This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p. This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).
Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
+++ /dev/null
-/*
- * linux/fs/9p/9p.h
- *
- * 9P protocol definitions.
- *
- * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-/* Message Types */
-enum {
- TVERSION = 100,
- RVERSION,
- TAUTH = 102,
- RAUTH,
- TATTACH = 104,
- RATTACH,
- TERROR = 106,
- RERROR,
- TFLUSH = 108,
- RFLUSH,
- TWALK = 110,
- RWALK,
- TOPEN = 112,
- ROPEN,
- TCREATE = 114,
- RCREATE,
- TREAD = 116,
- RREAD,
- TWRITE = 118,
- RWRITE,
- TCLUNK = 120,
- RCLUNK,
- TREMOVE = 122,
- RREMOVE,
- TSTAT = 124,
- RSTAT,
- TWSTAT = 126,
- RWSTAT,
-};
-
-/* modes */
-enum {
- V9FS_OREAD = 0x00,
- V9FS_OWRITE = 0x01,
- V9FS_ORDWR = 0x02,
- V9FS_OEXEC = 0x03,
- V9FS_OEXCL = 0x04,
- V9FS_OTRUNC = 0x10,
- V9FS_OREXEC = 0x20,
- V9FS_ORCLOSE = 0x40,
- V9FS_OAPPEND = 0x80,
-};
-
-/* permissions */
-enum {
- V9FS_DMDIR = 0x80000000,
- V9FS_DMAPPEND = 0x40000000,
- V9FS_DMEXCL = 0x20000000,
- V9FS_DMMOUNT = 0x10000000,
- V9FS_DMAUTH = 0x08000000,
- V9FS_DMTMP = 0x04000000,
- V9FS_DMSYMLINK = 0x02000000,
- V9FS_DMLINK = 0x01000000,
- /* 9P2000.u extensions */
- V9FS_DMDEVICE = 0x00800000,
- V9FS_DMNAMEDPIPE = 0x00200000,
- V9FS_DMSOCKET = 0x00100000,
- V9FS_DMSETUID = 0x00080000,
- V9FS_DMSETGID = 0x00040000,
-};
-
-/* qid.types */
-enum {
- V9FS_QTDIR = 0x80,
- V9FS_QTAPPEND = 0x40,
- V9FS_QTEXCL = 0x20,
- V9FS_QTMOUNT = 0x10,
- V9FS_QTAUTH = 0x08,
- V9FS_QTTMP = 0x04,
- V9FS_QTSYMLINK = 0x02,
- V9FS_QTLINK = 0x01,
- V9FS_QTFILE = 0x00,
-};
-
-#define V9FS_NOTAG (u16)(~0)
-#define V9FS_NOFID (u32)(~0)
-#define V9FS_MAXWELEM 16
-
-/* ample room for Twrite/Rread header (iounit) */
-#define V9FS_IOHDRSZ 24
-
-struct v9fs_str {
- u16 len;
- char *str;
-};
-
-/* qids are the unique ID for a file (like an inode */
-struct v9fs_qid {
- u8 type;
- u32 version;
- u64 path;
-};
-
-/* Plan 9 file metadata (stat) structure */
-struct v9fs_stat {
- u16 size;
- u16 type;
- u32 dev;
- struct v9fs_qid qid;
- u32 mode;
- u32 atime;
- u32 mtime;
- u64 length;
- struct v9fs_str name;
- struct v9fs_str uid;
- struct v9fs_str gid;
- struct v9fs_str muid;
- struct v9fs_str extension; /* 9p2000.u extensions */
- u32 n_uid; /* 9p2000.u extensions */
- u32 n_gid; /* 9p2000.u extensions */
- u32 n_muid; /* 9p2000.u extensions */
-};
-
-/* file metadata (stat) structure used to create Twstat message
- The is similar to v9fs_stat, but the strings don't point to
- the same memory block and should be freed separately
-*/
-struct v9fs_wstat {
- u16 size;
- u16 type;
- u32 dev;
- struct v9fs_qid qid;
- u32 mode;
- u32 atime;
- u32 mtime;
- u64 length;
- char *name;
- char *uid;
- char *gid;
- char *muid;
- char *extension; /* 9p2000.u extensions */
- u32 n_uid; /* 9p2000.u extensions */
- u32 n_gid; /* 9p2000.u extensions */
- u32 n_muid; /* 9p2000.u extensions */
-};
-
-/* Structures for Protocol Operations */
-
-struct Tversion {
- u32 msize;
- struct v9fs_str version;
-};
-
-struct Rversion {
- u32 msize;
- struct v9fs_str version;
-};
-
-struct Tauth {
- u32 afid;
- struct v9fs_str uname;
- struct v9fs_str aname;
-};
-
-struct Rauth {
- struct v9fs_qid qid;
-};
-
-struct Rerror {
- struct v9fs_str error;
- u32 errno; /* 9p2000.u extension */
-};
-
-struct Tflush {
- u16 oldtag;
-};
-
-struct Rflush {
-};
-
-struct Tattach {
- u32 fid;
- u32 afid;
- struct v9fs_str uname;
- struct v9fs_str aname;
-};
-
-struct Rattach {
- struct v9fs_qid qid;
-};
-
-struct Twalk {
- u32 fid;
- u32 newfid;
- u16 nwname;
- struct v9fs_str wnames[16];
-};
-
-struct Rwalk {
- u16 nwqid;
- struct v9fs_qid wqids[16];
-};
-
-struct Topen {
- u32 fid;
- u8 mode;
-};
-
-struct Ropen {
- struct v9fs_qid qid;
- u32 iounit;
-};
-
-struct Tcreate {
- u32 fid;
- struct v9fs_str name;
- u32 perm;
- u8 mode;
- struct v9fs_str extension;
-};
-
-struct Rcreate {
- struct v9fs_qid qid;
- u32 iounit;
-};
-
-struct Tread {
- u32 fid;
- u64 offset;
- u32 count;
-};
-
-struct Rread {
- u32 count;
- u8 *data;
-};
-
-struct Twrite {
- u32 fid;
- u64 offset;
- u32 count;
- u8 *data;
-};
-
-struct Rwrite {
- u32 count;
-};
-
-struct Tclunk {
- u32 fid;
-};
-
-struct Rclunk {
-};
-
-struct Tremove {
- u32 fid;
-};
-
-struct Rremove {
-};
-
-struct Tstat {
- u32 fid;
-};
-
-struct Rstat {
- struct v9fs_stat stat;
-};
-
-struct Twstat {
- u32 fid;
- struct v9fs_stat stat;
-};
-
-struct Rwstat {
-};
-
-/*
- * fcall is the primary packet structure
- *
- */
-
-struct v9fs_fcall {
- u32 size;
- u8 id;
- u16 tag;
- void *sdata;
-
- union {
- struct Tversion tversion;
- struct Rversion rversion;
- struct Tauth tauth;
- struct Rauth rauth;
- struct Rerror rerror;
- struct Tflush tflush;
- struct Rflush rflush;
- struct Tattach tattach;
- struct Rattach rattach;
- struct Twalk twalk;
- struct Rwalk rwalk;
- struct Topen topen;
- struct Ropen ropen;
- struct Tcreate tcreate;
- struct Rcreate rcreate;
- struct Tread tread;
- struct Rread rread;
- struct Twrite twrite;
- struct Rwrite rwrite;
- struct Tclunk tclunk;
- struct Rclunk rclunk;
- struct Tremove tremove;
- struct Rremove rremove;
- struct Tstat tstat;
- struct Rstat rstat;
- struct Twstat twstat;
- struct Rwstat rwstat;
- } params;
-};
-
-#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \
- fcall?fcall->params.rerror.error.len:0, \
- fcall?fcall->params.rerror.error.str:"");
-
-int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
- char *version, struct v9fs_fcall **rcall);
-
-int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
- u32 fid, u32 afid, struct v9fs_fcall **rcall);
-
-int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid);
-
-int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **rcall);
-
-int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_wstat *wstat, struct v9fs_fcall **rcall);
-
-int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
- char *name, struct v9fs_fcall **rcall);
-
-int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
- struct v9fs_fcall **rcall);
-
-int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **rcall);
-
-int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name,
- u32 perm, u8 mode, char *extension, struct v9fs_fcall **rcall);
-
-int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid,
- u64 offset, u32 count, struct v9fs_fcall **rcall);
-
-int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
- u32 count, const char __user * data,
- struct v9fs_fcall **rcall);
-int v9fs_printfcall(char *, int, struct v9fs_fcall *, int);
obj-$(CONFIG_9P_FS) := 9p.o
9p-objs := \
- trans_fd.o \
- mux.o \
- fcall.o \
- conv.o \
vfs_super.o \
vfs_inode.o \
vfs_addr.o \
vfs_file.o \
vfs_dir.o \
vfs_dentry.o \
- error.o \
v9fs.o \
fid.o \
- fcprint.o
+++ /dev/null
-/*
- * linux/fs/9p/conv.c
- *
- * 9P protocol conversion functions
- *
- * Copyright (C) 2004, 2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/idr.h>
-#include <asm/uaccess.h>
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-
-/*
- * Buffer to help with string parsing
- */
-struct cbuf {
- unsigned char *sp;
- unsigned char *p;
- unsigned char *ep;
-};
-
-static inline void buf_init(struct cbuf *buf, void *data, int datalen)
-{
- buf->sp = buf->p = data;
- buf->ep = data + datalen;
-}
-
-static inline int buf_check_overflow(struct cbuf *buf)
-{
- return buf->p > buf->ep;
-}
-
-static int buf_check_size(struct cbuf *buf, int len)
-{
- if (buf->p + len > buf->ep) {
- if (buf->p < buf->ep) {
- eprintk(KERN_ERR, "buffer overflow: want %d has %d\n",
- len, (int)(buf->ep - buf->p));
- dump_stack();
- buf->p = buf->ep + 1;
- }
-
- return 0;
- }
-
- return 1;
-}
-
-static void *buf_alloc(struct cbuf *buf, int len)
-{
- void *ret = NULL;
-
- if (buf_check_size(buf, len)) {
- ret = buf->p;
- buf->p += len;
- }
-
- return ret;
-}
-
-static void buf_put_int8(struct cbuf *buf, u8 val)
-{
- if (buf_check_size(buf, 1)) {
- buf->p[0] = val;
- buf->p++;
- }
-}
-
-static void buf_put_int16(struct cbuf *buf, u16 val)
-{
- if (buf_check_size(buf, 2)) {
- *(__le16 *) buf->p = cpu_to_le16(val);
- buf->p += 2;
- }
-}
-
-static void buf_put_int32(struct cbuf *buf, u32 val)
-{
- if (buf_check_size(buf, 4)) {
- *(__le32 *)buf->p = cpu_to_le32(val);
- buf->p += 4;
- }
-}
-
-static void buf_put_int64(struct cbuf *buf, u64 val)
-{
- if (buf_check_size(buf, 8)) {
- *(__le64 *)buf->p = cpu_to_le64(val);
- buf->p += 8;
- }
-}
-
-static char *buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
-{
- char *ret;
-
- ret = NULL;
- if (buf_check_size(buf, slen + 2)) {
- buf_put_int16(buf, slen);
- ret = buf->p;
- memcpy(buf->p, s, slen);
- buf->p += slen;
- }
-
- return ret;
-}
-
-static inline void buf_put_string(struct cbuf *buf, const char *s)
-{
- buf_put_stringn(buf, s, strlen(s));
-}
-
-static u8 buf_get_int8(struct cbuf *buf)
-{
- u8 ret = 0;
-
- if (buf_check_size(buf, 1)) {
- ret = buf->p[0];
- buf->p++;
- }
-
- return ret;
-}
-
-static u16 buf_get_int16(struct cbuf *buf)
-{
- u16 ret = 0;
-
- if (buf_check_size(buf, 2)) {
- ret = le16_to_cpu(*(__le16 *)buf->p);
- buf->p += 2;
- }
-
- return ret;
-}
-
-static u32 buf_get_int32(struct cbuf *buf)
-{
- u32 ret = 0;
-
- if (buf_check_size(buf, 4)) {
- ret = le32_to_cpu(*(__le32 *)buf->p);
- buf->p += 4;
- }
-
- return ret;
-}
-
-static u64 buf_get_int64(struct cbuf *buf)
-{
- u64 ret = 0;
-
- if (buf_check_size(buf, 8)) {
- ret = le64_to_cpu(*(__le64 *)buf->p);
- buf->p += 8;
- }
-
- return ret;
-}
-
-static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr)
-{
- vstr->len = buf_get_int16(buf);
- if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
- vstr->str = buf->p;
- buf->p += vstr->len;
- } else {
- vstr->len = 0;
- vstr->str = NULL;
- }
-}
-
-static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid)
-{
- qid->type = buf_get_int8(bufp);
- qid->version = buf_get_int32(bufp);
- qid->path = buf_get_int64(bufp);
-}
-
-/**
- * v9fs_size_wstat - calculate the size of a variable length stat struct
- * @stat: metadata (stat) structure
- * @extended: non-zero if 9P2000.u
- *
- */
-
-static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended)
-{
- int size = 0;
-
- if (wstat == NULL) {
- eprintk(KERN_ERR, "v9fs_size_stat: got a NULL stat pointer\n");
- return 0;
- }
-
- size = /* 2 + *//* size[2] */
- 2 + /* type[2] */
- 4 + /* dev[4] */
- 1 + /* qid.type[1] */
- 4 + /* qid.vers[4] */
- 8 + /* qid.path[8] */
- 4 + /* mode[4] */
- 4 + /* atime[4] */
- 4 + /* mtime[4] */
- 8 + /* length[8] */
- 8; /* minimum sum of string lengths */
-
- if (wstat->name)
- size += strlen(wstat->name);
- if (wstat->uid)
- size += strlen(wstat->uid);
- if (wstat->gid)
- size += strlen(wstat->gid);
- if (wstat->muid)
- size += strlen(wstat->muid);
-
- if (extended) {
- size += 4 + /* n_uid[4] */
- 4 + /* n_gid[4] */
- 4 + /* n_muid[4] */
- 2; /* string length of extension[4] */
- if (wstat->extension)
- size += strlen(wstat->extension);
- }
-
- return size;
-}
-
-/**
- * buf_get_stat - safely decode a recieved metadata (stat) structure
- * @bufp: buffer to deserialize
- * @stat: metadata (stat) structure
- * @extended: non-zero if 9P2000.u
- *
- */
-
-static void
-buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended)
-{
- stat->size = buf_get_int16(bufp);
- stat->type = buf_get_int16(bufp);
- stat->dev = buf_get_int32(bufp);
- stat->qid.type = buf_get_int8(bufp);
- stat->qid.version = buf_get_int32(bufp);
- stat->qid.path = buf_get_int64(bufp);
- stat->mode = buf_get_int32(bufp);
- stat->atime = buf_get_int32(bufp);
- stat->mtime = buf_get_int32(bufp);
- stat->length = buf_get_int64(bufp);
- buf_get_str(bufp, &stat->name);
- buf_get_str(bufp, &stat->uid);
- buf_get_str(bufp, &stat->gid);
- buf_get_str(bufp, &stat->muid);
-
- if (extended) {
- buf_get_str(bufp, &stat->extension);
- stat->n_uid = buf_get_int32(bufp);
- stat->n_gid = buf_get_int32(bufp);
- stat->n_muid = buf_get_int32(bufp);
- }
-}
-
-/**
- * v9fs_deserialize_stat - decode a received metadata structure
- * @buf: buffer to deserialize
- * @buflen: length of received buffer
- * @stat: metadata structure to decode into
- * @extended: non-zero if 9P2000.u
- *
- * Note: stat will point to the buf region.
- */
-
-int
-v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
- int extended)
-{
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
- unsigned char *p;
-
- buf_init(bufp, buf, buflen);
- p = bufp->p;
- buf_get_stat(bufp, stat, extended);
-
- if (buf_check_overflow(bufp))
- return 0;
- else
- return bufp->p - p;
-}
-
-/**
- * deserialize_fcall - unmarshal a response
- * @buf: recieved buffer
- * @buflen: length of received buffer
- * @rcall: fcall structure to populate
- * @rcalllen: length of fcall structure to populate
- * @extended: non-zero if 9P2000.u
- *
- */
-
-int
-v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
- int extended)
-{
-
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
- int i = 0;
-
- buf_init(bufp, buf, buflen);
-
- rcall->size = buf_get_int32(bufp);
- rcall->id = buf_get_int8(bufp);
- rcall->tag = buf_get_int16(bufp);
-
- dprintk(DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, rcall->id,
- rcall->tag);
-
- switch (rcall->id) {
- default:
- eprintk(KERN_ERR, "unknown message type: %d\n", rcall->id);
- return -EPROTO;
- case RVERSION:
- rcall->params.rversion.msize = buf_get_int32(bufp);
- buf_get_str(bufp, &rcall->params.rversion.version);
- break;
- case RFLUSH:
- break;
- case RATTACH:
- rcall->params.rattach.qid.type = buf_get_int8(bufp);
- rcall->params.rattach.qid.version = buf_get_int32(bufp);
- rcall->params.rattach.qid.path = buf_get_int64(bufp);
- break;
- case RWALK:
- rcall->params.rwalk.nwqid = buf_get_int16(bufp);
- if (rcall->params.rwalk.nwqid > V9FS_MAXWELEM) {
- eprintk(KERN_ERR, "Rwalk with more than %d qids: %d\n",
- V9FS_MAXWELEM, rcall->params.rwalk.nwqid);
- return -EPROTO;
- }
-
- for (i = 0; i < rcall->params.rwalk.nwqid; i++)
- buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
- break;
- case ROPEN:
- buf_get_qid(bufp, &rcall->params.ropen.qid);
- rcall->params.ropen.iounit = buf_get_int32(bufp);
- break;
- case RCREATE:
- buf_get_qid(bufp, &rcall->params.rcreate.qid);
- rcall->params.rcreate.iounit = buf_get_int32(bufp);
- break;
- case RREAD:
- rcall->params.rread.count = buf_get_int32(bufp);
- rcall->params.rread.data = bufp->p;
- buf_check_size(bufp, rcall->params.rread.count);
- break;
- case RWRITE:
- rcall->params.rwrite.count = buf_get_int32(bufp);
- break;
- case RCLUNK:
- break;
- case RREMOVE:
- break;
- case RSTAT:
- buf_get_int16(bufp);
- buf_get_stat(bufp, &rcall->params.rstat.stat, extended);
- break;
- case RWSTAT:
- break;
- case RERROR:
- buf_get_str(bufp, &rcall->params.rerror.error);
- if (extended)
- rcall->params.rerror.errno = buf_get_int16(bufp);
- break;
- }
-
- if (buf_check_overflow(bufp)) {
- dprintk(DEBUG_ERROR, "buffer overflow\n");
- return -EIO;
- }
-
- return bufp->p - bufp->sp;
-}
-
-static inline void v9fs_put_int8(struct cbuf *bufp, u8 val, u8 * p)
-{
- *p = val;
- buf_put_int8(bufp, val);
-}
-
-static inline void v9fs_put_int16(struct cbuf *bufp, u16 val, u16 * p)
-{
- *p = val;
- buf_put_int16(bufp, val);
-}
-
-static inline void v9fs_put_int32(struct cbuf *bufp, u32 val, u32 * p)
-{
- *p = val;
- buf_put_int32(bufp, val);
-}
-
-static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p)
-{
- *p = val;
- buf_put_int64(bufp, val);
-}
-
-static void
-v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str)
-{
- int len;
- char *s;
-
- if (data)
- len = strlen(data);
- else
- len = 0;
-
- s = buf_put_stringn(bufp, data, len);
- if (str) {
- str->len = len;
- str->str = s;
- }
-}
-
-static int
-v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count,
- unsigned char **pdata)
-{
- *pdata = buf_alloc(bufp, count);
- return copy_from_user(*pdata, data, count);
-}
-
-static void
-v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat,
- struct v9fs_stat *stat, int statsz, int extended)
-{
- v9fs_put_int16(bufp, statsz, &stat->size);
- v9fs_put_int16(bufp, wstat->type, &stat->type);
- v9fs_put_int32(bufp, wstat->dev, &stat->dev);
- v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type);
- v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version);
- v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path);
- v9fs_put_int32(bufp, wstat->mode, &stat->mode);
- v9fs_put_int32(bufp, wstat->atime, &stat->atime);
- v9fs_put_int32(bufp, wstat->mtime, &stat->mtime);
- v9fs_put_int64(bufp, wstat->length, &stat->length);
-
- v9fs_put_str(bufp, wstat->name, &stat->name);
- v9fs_put_str(bufp, wstat->uid, &stat->uid);
- v9fs_put_str(bufp, wstat->gid, &stat->gid);
- v9fs_put_str(bufp, wstat->muid, &stat->muid);
-
- if (extended) {
- v9fs_put_str(bufp, wstat->extension, &stat->extension);
- v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid);
- v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid);
- v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid);
- }
-}
-
-static struct v9fs_fcall *
-v9fs_create_common(struct cbuf *bufp, u32 size, u8 id)
-{
- struct v9fs_fcall *fc;
-
- size += 4 + 1 + 2; /* size[4] id[1] tag[2] */
- fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL);
- if (!fc)
- return ERR_PTR(-ENOMEM);
-
- fc->sdata = (char *)fc + sizeof(*fc);
-
- buf_init(bufp, (char *)fc->sdata, size);
- v9fs_put_int32(bufp, size, &fc->size);
- v9fs_put_int8(bufp, id, &fc->id);
- v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag);
-
- return fc;
-}
-
-void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag)
-{
- fc->tag = tag;
- *(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
-}
-
-struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 2 + strlen(version); /* msize[4] version[s] */
- fc = v9fs_create_common(bufp, size, TVERSION);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, msize, &fc->params.tversion.msize);
- v9fs_put_str(bufp, version, &fc->params.tversion.version);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-#if 0
-struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 2 + strlen(uname) + 2 + strlen(aname); /* afid[4] uname[s] aname[s] */
- fc = v9fs_create_common(bufp, size, TAUTH);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, afid, &fc->params.tauth.afid);
- v9fs_put_str(bufp, uname, &fc->params.tauth.uname);
- v9fs_put_str(bufp, aname, &fc->params.tauth.aname);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-#endif /* 0 */
-
-struct v9fs_fcall *
-v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); /* fid[4] afid[4] uname[s] aname[s] */
- fc = v9fs_create_common(bufp, size, TATTACH);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tattach.fid);
- v9fs_put_int32(bufp, afid, &fc->params.tattach.afid);
- v9fs_put_str(bufp, uname, &fc->params.tattach.uname);
- v9fs_put_str(bufp, aname, &fc->params.tattach.aname);
-
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tflush(u16 oldtag)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 2; /* oldtag[2] */
- fc = v9fs_create_common(bufp, size, TFLUSH);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
- char **wnames)
-{
- int i, size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- if (nwname > V9FS_MAXWELEM) {
- dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_MAXWELEM);
- return NULL;
- }
-
- size = 4 + 4 + 2; /* fid[4] newfid[4] nwname[2] ... */
- for (i = 0; i < nwname; i++) {
- size += 2 + strlen(wnames[i]); /* wname[s] */
- }
-
- fc = v9fs_create_common(bufp, size, TWALK);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.twalk.fid);
- v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid);
- v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname);
- for (i = 0; i < nwname; i++) {
- v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
- }
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 1; /* fid[4] mode[1] */
- fc = v9fs_create_common(bufp, size, TOPEN);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.topen.fid);
- v9fs_put_int8(bufp, mode, &fc->params.topen.mode);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
- char *extension, int extended)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 2 + strlen(name) + 4 + 1; /* fid[4] name[s] perm[4] mode[1] */
- if (extended) {
- size += 2 + /* extension[s] */
- (extension == NULL ? 0 : strlen(extension));
- }
-
- fc = v9fs_create_common(bufp, size, TCREATE);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid);
- v9fs_put_str(bufp, name, &fc->params.tcreate.name);
- v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm);
- v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode);
- if (extended)
- v9fs_put_str(bufp, extension, &fc->params.tcreate.extension);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */
- fc = v9fs_create_common(bufp, size, TREAD);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tread.fid);
- v9fs_put_int64(bufp, offset, &fc->params.tread.offset);
- v9fs_put_int32(bufp, count, &fc->params.tread.count);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
- const char __user * data)
-{
- int size, err;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4 + 8 + 4 + count; /* fid[4] offset[8] count[4] data[count] */
- fc = v9fs_create_common(bufp, size, TWRITE);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.twrite.fid);
- v9fs_put_int64(bufp, offset, &fc->params.twrite.offset);
- v9fs_put_int32(bufp, count, &fc->params.twrite.count);
- err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data);
- if (err) {
- kfree(fc);
- fc = ERR_PTR(err);
- }
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tclunk(u32 fid)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4; /* fid[4] */
- fc = v9fs_create_common(bufp, size, TCLUNK);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tremove(u32 fid)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4; /* fid[4] */
- fc = v9fs_create_common(bufp, size, TREMOVE);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tremove.fid);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_tstat(u32 fid)
-{
- int size;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- size = 4; /* fid[4] */
- fc = v9fs_create_common(bufp, size, TSTAT);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.tstat.fid);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
-
-struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
- int extended)
-{
- int size, statsz;
- struct v9fs_fcall *fc;
- struct cbuf buffer;
- struct cbuf *bufp = &buffer;
-
- statsz = v9fs_size_wstat(wstat, extended);
- size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */
- fc = v9fs_create_common(bufp, size, TWSTAT);
- if (IS_ERR(fc))
- goto error;
-
- v9fs_put_int32(bufp, fid, &fc->params.twstat.fid);
- buf_put_int16(bufp, statsz + 2);
- v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended);
-
- if (buf_check_overflow(bufp)) {
- kfree(fc);
- fc = ERR_PTR(-ENOMEM);
- }
- error:
- return fc;
-}
+++ /dev/null
-/*
- * linux/fs/9p/conv.h
- *
- * 9P protocol conversion definitions.
- *
- * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat,
- int extended);
-int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall,
- int extended);
-
-void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag);
-
-struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version);
-struct v9fs_fcall *v9fs_create_tattach(u32 fid, u32 afid, char *uname,
- char *aname);
-struct v9fs_fcall *v9fs_create_tflush(u16 oldtag);
-struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname,
- char **wnames);
-struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode);
-struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
- char *extension, int extended);
-struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count);
-struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count,
- const char __user *data);
-struct v9fs_fcall *v9fs_create_tclunk(u32 fid);
-struct v9fs_fcall *v9fs_create_tremove(u32 fid);
-struct v9fs_fcall *v9fs_create_tstat(u32 fid);
-struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat,
- int extended);
+++ /dev/null
-/*
- * linux/fs/9p/debug.h - V9FS Debug Definitions
- *
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#define DEBUG_ERROR (1<<0)
-#define DEBUG_CURRENT (1<<1)
-#define DEBUG_9P (1<<2)
-#define DEBUG_VFS (1<<3)
-#define DEBUG_CONV (1<<4)
-#define DEBUG_MUX (1<<5)
-#define DEBUG_TRANS (1<<6)
-#define DEBUG_SLABS (1<<7)
-#define DEBUG_FCALL (1<<8)
-
-#define DEBUG_DUMP_PKT 0
-
-extern int v9fs_debug_level;
-
-#define dprintk(level, format, arg...) \
-do { \
- if((v9fs_debug_level & level)==level) \
- printk(KERN_NOTICE "-- %s (%d): " \
- format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#define eprintk(level, format, arg...) \
-do { \
- printk(level "v9fs: %s (%d): " \
- format , __FUNCTION__, current->pid , ## arg); \
-} while(0)
-
-#if DEBUG_DUMP_PKT
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
- int i, n;
- char buf[5*8];
-
- n = 0;
- i = 0;
- while (i < datalen) {
- n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]);
- if (i%4 == 0)
- n += snprintf(buf+n, sizeof(buf)-n, " ");
-
- if (i%16 == 0) {
- dprintk(DEBUG_ERROR, "%s\n", buf);
- n = 0;
- }
- }
-
- dprintk(DEBUG_ERROR, "%s\n", buf);
-}
-#else /* DEBUG_DUMP_PKT */
-static inline void dump_data(const unsigned char *data, unsigned int datalen)
-{
-
-}
-#endif /* DEBUG_DUMP_PKT */
+++ /dev/null
-/*
- * linux/fs/9p/error.c
- *
- * Error string handling
- *
- * Plan 9 uses error strings, Unix uses error numbers. These functions
- * try to help manage that and provide for dynamically adding error
- * mappings.
- *
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/module.h>
-
-#include <linux/list.h>
-#include <linux/jhash.h>
-
-#include "debug.h"
-#include "error.h"
-
-/**
- * v9fs_error_init - preload
- * @errstr: error string
- *
- */
-
-int v9fs_error_init(void)
-{
- struct errormap *c;
- int bucket;
-
- /* initialize hash table */
- for (bucket = 0; bucket < ERRHASHSZ; bucket++)
- INIT_HLIST_HEAD(&hash_errmap[bucket]);
-
- /* load initial error map into hash table */
- for (c = errmap; c->name != NULL; c++) {
- c->namelen = strlen(c->name);
- bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
- INIT_HLIST_NODE(&c->list);
- hlist_add_head(&c->list, &hash_errmap[bucket]);
- }
-
- return 1;
-}
-
-/**
- * errstr2errno - convert error string to error number
- * @errstr: error string
- *
- */
-
-int v9fs_errstr2errno(char *errstr, int len)
-{
- int errno = 0;
- struct hlist_node *p = NULL;
- struct errormap *c = NULL;
- int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
-
- hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
- if (c->namelen==len && !memcmp(c->name, errstr, len)) {
- errno = c->val;
- break;
- }
- }
-
- if (errno == 0) {
- /* TODO: if error isn't found, add it dynamically */
- errstr[len] = 0;
- printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
- errstr);
- errno = 1;
- }
-
- return -errno;
-}
+++ /dev/null
-/*
- * linux/fs/9p/error.h
- *
- * Huge Nasty Error Table
- *
- * Plan 9 uses error strings, Unix uses error numbers. This table tries to
- * match UNIX strings and Plan 9 strings to unix error numbers. It is used
- * to preload the dynamic error table which can also track user-specific error
- * strings.
- *
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/errno.h>
-#include <asm/errno.h>
-
-struct errormap {
- char *name;
- int val;
-
- int namelen;
- struct hlist_node list;
-};
-
-#define ERRHASHSZ 32
-static struct hlist_head hash_errmap[ERRHASHSZ];
-
-/* FixMe - reduce to a reasonable size */
-static struct errormap errmap[] = {
- {"Operation not permitted", EPERM},
- {"wstat prohibited", EPERM},
- {"No such file or directory", ENOENT},
- {"directory entry not found", ENOENT},
- {"file not found", ENOENT},
- {"Interrupted system call", EINTR},
- {"Input/output error", EIO},
- {"No such device or address", ENXIO},
- {"Argument list too long", E2BIG},
- {"Bad file descriptor", EBADF},
- {"Resource temporarily unavailable", EAGAIN},
- {"Cannot allocate memory", ENOMEM},
- {"Permission denied", EACCES},
- {"Bad address", EFAULT},
- {"Block device required", ENOTBLK},
- {"Device or resource busy", EBUSY},
- {"File exists", EEXIST},
- {"Invalid cross-device link", EXDEV},
- {"No such device", ENODEV},
- {"Not a directory", ENOTDIR},
- {"Is a directory", EISDIR},
- {"Invalid argument", EINVAL},
- {"Too many open files in system", ENFILE},
- {"Too many open files", EMFILE},
- {"Text file busy", ETXTBSY},
- {"File too large", EFBIG},
- {"No space left on device", ENOSPC},
- {"Illegal seek", ESPIPE},
- {"Read-only file system", EROFS},
- {"Too many links", EMLINK},
- {"Broken pipe", EPIPE},
- {"Numerical argument out of domain", EDOM},
- {"Numerical result out of range", ERANGE},
- {"Resource deadlock avoided", EDEADLK},
- {"File name too long", ENAMETOOLONG},
- {"No locks available", ENOLCK},
- {"Function not implemented", ENOSYS},
- {"Directory not empty", ENOTEMPTY},
- {"Too many levels of symbolic links", ELOOP},
- {"No message of desired type", ENOMSG},
- {"Identifier removed", EIDRM},
- {"No data available", ENODATA},
- {"Machine is not on the network", ENONET},
- {"Package not installed", ENOPKG},
- {"Object is remote", EREMOTE},
- {"Link has been severed", ENOLINK},
- {"Communication error on send", ECOMM},
- {"Protocol error", EPROTO},
- {"Bad message", EBADMSG},
- {"File descriptor in bad state", EBADFD},
- {"Streams pipe error", ESTRPIPE},
- {"Too many users", EUSERS},
- {"Socket operation on non-socket", ENOTSOCK},
- {"Message too long", EMSGSIZE},
- {"Protocol not available", ENOPROTOOPT},
- {"Protocol not supported", EPROTONOSUPPORT},
- {"Socket type not supported", ESOCKTNOSUPPORT},
- {"Operation not supported", EOPNOTSUPP},
- {"Protocol family not supported", EPFNOSUPPORT},
- {"Network is down", ENETDOWN},
- {"Network is unreachable", ENETUNREACH},
- {"Network dropped connection on reset", ENETRESET},
- {"Software caused connection abort", ECONNABORTED},
- {"Connection reset by peer", ECONNRESET},
- {"No buffer space available", ENOBUFS},
- {"Transport endpoint is already connected", EISCONN},
- {"Transport endpoint is not connected", ENOTCONN},
- {"Cannot send after transport endpoint shutdown", ESHUTDOWN},
- {"Connection timed out", ETIMEDOUT},
- {"Connection refused", ECONNREFUSED},
- {"Host is down", EHOSTDOWN},
- {"No route to host", EHOSTUNREACH},
- {"Operation already in progress", EALREADY},
- {"Operation now in progress", EINPROGRESS},
- {"Is a named type file", EISNAM},
- {"Remote I/O error", EREMOTEIO},
- {"Disk quota exceeded", EDQUOT},
-/* errors from fossil, vacfs, and u9fs */
- {"fid unknown or out of range", EBADF},
- {"permission denied", EACCES},
- {"file does not exist", ENOENT},
- {"authentication failed", ECONNREFUSED},
- {"bad offset in directory read", ESPIPE},
- {"bad use of fid", EBADF},
- {"wstat can't convert between files and directories", EPERM},
- {"directory is not empty", ENOTEMPTY},
- {"file exists", EEXIST},
- {"file already exists", EEXIST},
- {"file or directory already exists", EEXIST},
- {"fid already in use", EBADF},
- {"file in use", ETXTBSY},
- {"i/o error", EIO},
- {"file already open for I/O", ETXTBSY},
- {"illegal mode", EINVAL},
- {"illegal name", ENAMETOOLONG},
- {"not a directory", ENOTDIR},
- {"not a member of proposed group", EPERM},
- {"not owner", EACCES},
- {"only owner can change group in wstat", EACCES},
- {"read only file system", EROFS},
- {"no access to special file", EPERM},
- {"i/o count too large", EIO},
- {"unknown group", EINVAL},
- {"unknown user", EINVAL},
- {"bogus wstat buffer", EPROTO},
- {"exclusive use file already open", EAGAIN},
- {"corrupted directory entry", EIO},
- {"corrupted file entry", EIO},
- {"corrupted block label", EIO},
- {"corrupted meta data", EIO},
- {"illegal offset", EINVAL},
- {"illegal path element", ENOENT},
- {"root of file system is corrupted", EIO},
- {"corrupted super block", EIO},
- {"protocol botch", EPROTO},
- {"file system is full", ENOSPC},
- {"file is in use", EAGAIN},
- {"directory entry is not allocated", ENOENT},
- {"file is read only", EROFS},
- {"file has been removed", EIDRM},
- {"only support truncation to zero length", EPERM},
- {"cannot remove root", EPERM},
- {"file too big", EFBIG},
- {"venti i/o error", EIO},
- /* these are not errors */
- {"u9fs rhostsauth: no authentication required", 0},
- {"u9fs authnone: no authentication required", 0},
- {NULL, -1}
-};
-
-extern int v9fs_error_init(void);
+++ /dev/null
-/*
- * linux/fs/9p/fcall.c
- *
- * This file contains functions to perform synchronous 9P calls
- *
- * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/sched.h>
-#include <linux/idr.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-#include "mux.h"
-
-/**
- * v9fs_t_version - negotiate protocol parameters with sever
- * @v9ses: 9P2000 session information
- * @msize: requested max size packet
- * @version: requested version.extension string
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize,
- char *version, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version);
- tc = v9fs_create_tversion(msize, version);
-
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_attach - mount the server
- * @v9ses: 9P2000 session information
- * @uname: user name doing the attach
- * @aname: remote name being attached to
- * @fid: mount fid to attatch to root node
- * @afid: authentication fid (in this case result key)
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname,
- u32 fid, u32 afid, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall* tc;
-
- dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname,
- aname, fid, afid);
-
- tc = v9fs_create_tattach(fid, afid, uname, aname);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc,
- struct v9fs_fcall *rc, int err)
-{
- int fid, id;
- struct v9fs_session_info *v9ses;
-
- id = 0;
- fid = tc->params.tclunk.fid;
- if (rc)
- id = rc->id;
-
- kfree(tc);
- kfree(rc);
- if (id == RCLUNK) {
- v9ses = a;
- v9fs_put_idpool(fid, &v9ses->fidpool);
- }
-}
-
-/**
- * v9fs_t_clunk - release a fid (finish a transaction)
- * @v9ses: 9P2000 session information
- * @fid: fid to release
- * @fcall: pointer to response fcall pointer
- *
- */
-
-int
-v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid)
-{
- int ret;
- struct v9fs_fcall *tc, *rc;
-
- dprintk(DEBUG_9P, "fid %d\n", fid);
-
- rc = NULL;
- tc = v9fs_create_tclunk(fid);
- if (!IS_ERR(tc))
- ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
- else
- ret = PTR_ERR(tc);
-
- if (ret)
- dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret);
-
- v9fs_t_clunk_cb(v9ses, tc, rc, ret);
- return ret;
-}
-
-#if 0
-/**
- * v9fs_v9fs_t_flush - flush a pending transaction
- * @v9ses: 9P2000 session information
- * @tag: tag to release
- *
- */
-int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "oldtag %d\n", oldtag);
-
- tc = v9fs_create_tflush(oldtag);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, NULL);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-#endif
-
-/**
- * v9fs_t_stat - read a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to get info about
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "fid %d\n", fid);
-
- ret = -ENOMEM;
- tc = v9fs_create_tstat(fid);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_wstat - write a file's meta-data
- * @v9ses: 9P2000 session information
- * @fid: fid pointing to file or directory to write info about
- * @stat: metadata
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_wstat *wstat, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "fid %d\n", fid);
-
- tc = v9fs_create_twstat(fid, wstat, v9ses->extended);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_walk - walk a fid to a new file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to walk
- * @newfid: new fid (for clone operations)
- * @name: path to walk fid to
- * @fcall: pointer to response fcall
- *
- */
-
-/* TODO: support multiple walk */
-
-int
-v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid,
- char *name, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
- int nwname;
-
- dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name);
-
- if (name)
- nwname = 1;
- else
- nwname = 0;
-
- tc = v9fs_create_twalk(fid, newfid, nwname, &name);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_open - open a file
- *
- * @v9ses - 9P2000 session information
- * @fid - fid to open
- * @mode - mode to open file (R, RW, etc)
- * @fcall - pointer to response fcall
- *
- */
-
-int
-v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode,
- struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode);
-
- tc = v9fs_create_topen(fid, mode);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_remove - remove a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to remove
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid,
- struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "fid %d\n", fid);
-
- tc = v9fs_create_tremove(fid);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_create - create a file or directory
- * @v9ses: 9P2000 session information
- * @fid: fid to create
- * @name: name of the file or directory to create
- * @perm: permissions to create with
- * @mode: mode to open file (R, RW, etc)
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm,
- u8 mode, char *extension, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc;
-
- dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n",
- fid, name, perm, mode);
-
- tc = v9fs_create_tcreate(fid, name, perm, mode, extension,
- v9ses->extended);
-
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, rcp);
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_read - read data
- * @v9ses: 9P2000 session information
- * @fid: fid to read from
- * @offset: offset to start read at
- * @count: how many bytes to read
- * @fcall: pointer to response fcall (with data)
- *
- */
-
-int
-v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset,
- u32 count, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc, *rc;
-
- dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
- (long long unsigned) offset, count);
-
- tc = v9fs_create_tread(fid, offset, count);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
- if (!ret)
- ret = rc->params.rread.count;
- if (rcp)
- *rcp = rc;
- else
- kfree(rc);
-
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
-/**
- * v9fs_t_write - write data
- * @v9ses: 9P2000 session information
- * @fid: fid to write to
- * @offset: offset to start write at
- * @count: how many bytes to write
- * @fcall: pointer to response fcall
- *
- */
-
-int
-v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count,
- const char __user *data, struct v9fs_fcall **rcp)
-{
- int ret;
- struct v9fs_fcall *tc, *rc;
-
- dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid,
- (long long unsigned) offset, count);
-
- tc = v9fs_create_twrite(fid, offset, count, data);
- if (!IS_ERR(tc)) {
- ret = v9fs_mux_rpc(v9ses->mux, tc, &rc);
-
- if (!ret)
- ret = rc->params.rwrite.count;
- if (rcp)
- *rcp = rc;
- else
- kfree(rc);
-
- kfree(tc);
- } else
- ret = PTR_ERR(tc);
-
- return ret;
-}
-
+++ /dev/null
-/*
- * linux/fs/9p/fcprint.c
- *
- * Print 9P call.
- *
- * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/idr.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "mux.h"
-
-static int
-v9fs_printqid(char *buf, int buflen, struct v9fs_qid *q)
-{
- int n;
- char b[10];
-
- n = 0;
- if (q->type & V9FS_QTDIR)
- b[n++] = 'd';
- if (q->type & V9FS_QTAPPEND)
- b[n++] = 'a';
- if (q->type & V9FS_QTAUTH)
- b[n++] = 'A';
- if (q->type & V9FS_QTEXCL)
- b[n++] = 'l';
- if (q->type & V9FS_QTTMP)
- b[n++] = 't';
- if (q->type & V9FS_QTSYMLINK)
- b[n++] = 'L';
- b[n] = '\0';
-
- return scnprintf(buf, buflen, "(%.16llx %x %s)", (long long int) q->path,
- q->version, b);
-}
-
-static int
-v9fs_printperm(char *buf, int buflen, int perm)
-{
- int n;
- char b[15];
-
- n = 0;
- if (perm & V9FS_DMDIR)
- b[n++] = 'd';
- if (perm & V9FS_DMAPPEND)
- b[n++] = 'a';
- if (perm & V9FS_DMAUTH)
- b[n++] = 'A';
- if (perm & V9FS_DMEXCL)
- b[n++] = 'l';
- if (perm & V9FS_DMTMP)
- b[n++] = 't';
- if (perm & V9FS_DMDEVICE)
- b[n++] = 'D';
- if (perm & V9FS_DMSOCKET)
- b[n++] = 'S';
- if (perm & V9FS_DMNAMEDPIPE)
- b[n++] = 'P';
- if (perm & V9FS_DMSYMLINK)
- b[n++] = 'L';
- b[n] = '\0';
-
- return scnprintf(buf, buflen, "%s%03o", b, perm&077);
-}
-
-static int
-v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended)
-{
- int n;
-
- n = scnprintf(buf, buflen, "'%.*s' '%.*s'", st->name.len,
- st->name.str, st->uid.len, st->uid.str);
- if (extended)
- n += scnprintf(buf+n, buflen-n, "(%d)", st->n_uid);
-
- n += scnprintf(buf+n, buflen-n, " '%.*s'", st->gid.len, st->gid.str);
- if (extended)
- n += scnprintf(buf+n, buflen-n, "(%d)", st->n_gid);
-
- n += scnprintf(buf+n, buflen-n, " '%.*s'", st->muid.len, st->muid.str);
- if (extended)
- n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
-
- n += scnprintf(buf+n, buflen-n, " q ");
- n += v9fs_printqid(buf+n, buflen-n, &st->qid);
- n += scnprintf(buf+n, buflen-n, " m ");
- n += v9fs_printperm(buf+n, buflen-n, st->mode);
- n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld",
- st->atime, st->mtime, (long long int) st->length);
-
- if (extended)
- n += scnprintf(buf+n, buflen-n, " ext '%.*s'",
- st->extension.len, st->extension.str);
-
- return n;
-}
-
-static int
-v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen)
-{
- int i, n;
-
- i = n = 0;
- while (i < datalen) {
- n += scnprintf(buf + n, buflen - n, "%02x", data[i]);
- if (i%4 == 3)
- n += scnprintf(buf + n, buflen - n, " ");
- if (i%32 == 31)
- n += scnprintf(buf + n, buflen - n, "\n");
-
- i++;
- }
- n += scnprintf(buf + n, buflen - n, "\n");
-
- return n;
-}
-
-static int
-v9fs_printdata(char *buf, int buflen, u8 *data, int datalen)
-{
- return v9fs_dumpdata(buf, buflen, data, datalen<16?datalen:16);
-}
-
-int
-v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended)
-{
- int i, ret, type, tag;
-
- if (!fc)
- return scnprintf(buf, buflen, "<NULL>");
-
- type = fc->id;
- tag = fc->tag;
-
- ret = 0;
- switch (type) {
- case TVERSION:
- ret += scnprintf(buf+ret, buflen-ret,
- "Tversion tag %u msize %u version '%.*s'", tag,
- fc->params.tversion.msize, fc->params.tversion.version.len,
- fc->params.tversion.version.str);
- break;
-
- case RVERSION:
- ret += scnprintf(buf+ret, buflen-ret,
- "Rversion tag %u msize %u version '%.*s'", tag,
- fc->params.rversion.msize, fc->params.rversion.version.len,
- fc->params.rversion.version.str);
- break;
-
- case TAUTH:
- ret += scnprintf(buf+ret, buflen-ret,
- "Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag,
- fc->params.tauth.afid, fc->params.tauth.uname.len,
- fc->params.tauth.uname.str, fc->params.tauth.aname.len,
- fc->params.tauth.aname.str);
- break;
-
- case RAUTH:
- ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
- v9fs_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
- break;
-
- case TATTACH:
- ret += scnprintf(buf+ret, buflen-ret,
- "Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'",
- tag, fc->params.tattach.fid, fc->params.tattach.afid,
- fc->params.tattach.uname.len, fc->params.tattach.uname.str,
- fc->params.tattach.aname.len, fc->params.tattach.aname.str);
- break;
-
- case RATTACH:
- ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", tag);
- v9fs_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
- break;
-
- case RERROR:
- ret += scnprintf(buf+ret, buflen-ret, "Rerror tag %u ename '%.*s'",
- tag, fc->params.rerror.error.len,
- fc->params.rerror.error.str);
- if (extended)
- ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
- fc->params.rerror.errno);
- break;
-
- case TFLUSH:
- ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
- tag, fc->params.tflush.oldtag);
- break;
-
- case RFLUSH:
- ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
- break;
-
- case TWALK:
- ret += scnprintf(buf+ret, buflen-ret,
- "Twalk tag %u fid %d newfid %d nwname %d", tag,
- fc->params.twalk.fid, fc->params.twalk.newfid,
- fc->params.twalk.nwname);
- for(i = 0; i < fc->params.twalk.nwname; i++)
- ret += scnprintf(buf+ret, buflen-ret," '%.*s'",
- fc->params.twalk.wnames[i].len,
- fc->params.twalk.wnames[i].str);
- break;
-
- case RWALK:
- ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d",
- tag, fc->params.rwalk.nwqid);
- for(i = 0; i < fc->params.rwalk.nwqid; i++)
- ret += v9fs_printqid(buf+ret, buflen-ret,
- &fc->params.rwalk.wqids[i]);
- break;
-
- case TOPEN:
- ret += scnprintf(buf+ret, buflen-ret,
- "Topen tag %u fid %d mode %d", tag,
- fc->params.topen.fid, fc->params.topen.mode);
- break;
-
- case ROPEN:
- ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
- ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
- ret += scnprintf(buf+ret, buflen-ret," iounit %d",
- fc->params.ropen.iounit);
- break;
-
- case TCREATE:
- ret += scnprintf(buf+ret, buflen-ret,
- "Tcreate tag %u fid %d name '%.*s' perm ", tag,
- fc->params.tcreate.fid, fc->params.tcreate.name.len,
- fc->params.tcreate.name.str);
-
- ret += v9fs_printperm(buf+ret, buflen-ret, fc->params.tcreate.perm);
- ret += scnprintf(buf+ret, buflen-ret, " mode %d",
- fc->params.tcreate.mode);
- break;
-
- case RCREATE:
- ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
- ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.rcreate.qid);
- ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
- fc->params.rcreate.iounit);
- break;
-
- case TREAD:
- ret += scnprintf(buf+ret, buflen-ret,
- "Tread tag %u fid %d offset %lld count %u", tag,
- fc->params.tread.fid,
- (long long int) fc->params.tread.offset,
- fc->params.tread.count);
- break;
-
- case RREAD:
- ret += scnprintf(buf+ret, buflen-ret,
- "Rread tag %u count %u data ", tag,
- fc->params.rread.count);
- ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.rread.data,
- fc->params.rread.count);
- break;
-
- case TWRITE:
- ret += scnprintf(buf+ret, buflen-ret,
- "Twrite tag %u fid %d offset %lld count %u data ",
- tag, fc->params.twrite.fid,
- (long long int) fc->params.twrite.offset,
- fc->params.twrite.count);
- ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
- fc->params.twrite.count);
- break;
-
- case RWRITE:
- ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
- tag, fc->params.rwrite.count);
- break;
-
- case TCLUNK:
- ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
- tag, fc->params.tclunk.fid);
- break;
-
- case RCLUNK:
- ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
- break;
-
- case TREMOVE:
- ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
- tag, fc->params.tremove.fid);
- break;
-
- case RREMOVE:
- ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
- break;
-
- case TSTAT:
- ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
- tag, fc->params.tstat.fid);
- break;
-
- case RSTAT:
- ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
- ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
- extended);
- break;
-
- case TWSTAT:
- ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
- tag, fc->params.twstat.fid);
- ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.twstat.stat,
- extended);
- break;
-
- case RWSTAT:
- ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
- break;
-
- default:
- ret += scnprintf(buf+ret, buflen-ret, "unknown type %d", type);
- break;
- }
-
- return ret;
-}
#include <linux/sched.h>
#include <linux/idr.h>
#include <asm/semaphore.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
*
*/
-int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry)
+int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid)
{
- struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
- dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid,
- dentry->d_iname, dentry);
- if (dentry->d_fsdata == NULL) {
- dentry->d_fsdata =
- kmalloc(sizeof(struct list_head), GFP_KERNEL);
- if (dentry->d_fsdata == NULL) {
- dprintk(DEBUG_ERROR, "Out of memory\n");
- return -ENOMEM;
- }
- fid_list = (struct list_head *)dentry->d_fsdata;
- INIT_LIST_HEAD(fid_list); /* Initialize list head */
- }
+ struct v9fs_dentry *dent;
- fid->uid = current->uid;
- list_add(&fid->list, fid_list);
- return 0;
-}
+ P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n",
+ fid->fid, dentry->d_iname);
-/**
- * v9fs_fid_create - allocate a FID structure
- * @dentry - dentry to link newly created fid to
- *
- */
-
-struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid)
-{
- struct v9fs_fid *new;
+ dent = dentry->d_fsdata;
+ if (!dent) {
+ dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL);
+ if (!dent)
+ return -ENOMEM;
- dprintk(DEBUG_9P, "fid create fid %d\n", fid);
- new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL);
- if (new == NULL) {
- dprintk(DEBUG_ERROR, "Out of Memory\n");
- return ERR_PTR(-ENOMEM);
+ spin_lock_init(&dent->lock);
+ INIT_LIST_HEAD(&dent->fidlist);
+ dentry->d_fsdata = dent;
}
- new->fid = fid;
- new->v9ses = v9ses;
- new->fidopen = 0;
- new->fidclunked = 0;
- new->iounit = 0;
- new->rdir_pos = 0;
- new->rdir_fcall = NULL;
- init_MUTEX(&new->lock);
- INIT_LIST_HEAD(&new->list);
-
- return new;
-}
-
-/**
- * v9fs_fid_destroy - deallocate a FID structure
- * @fid: fid to destroy
- *
- */
+ spin_lock(&dent->lock);
+ list_add(&fid->dlist, &dent->fidlist);
+ spin_unlock(&dent->lock);
-void v9fs_fid_destroy(struct v9fs_fid *fid)
-{
- list_del(&fid->list);
- kfree(fid);
+ return 0;
}
/**
*
*/
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
+struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
{
- struct list_head *fid_list = (struct list_head *)dentry->d_fsdata;
- struct v9fs_fid *return_fid = NULL;
-
- dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry);
-
- if (fid_list)
- return_fid = list_entry(fid_list->next, struct v9fs_fid, list);
+ struct v9fs_dentry *dent;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ dent = dentry->d_fsdata;
+ if (dent)
+ fid = list_entry(dent->fidlist.next, struct p9_fid, dlist);
+ else
+ fid = ERR_PTR(-EBADF);
+
+ P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid);
+ return fid;
+}
- if (!return_fid) {
- dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n");
- return_fid = ERR_PTR(-EBADF);
+struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry)
+{
+ struct p9_fid *fid;
+ struct v9fs_dentry *dent;
+
+ dent = dentry->d_fsdata;
+ fid = v9fs_fid_lookup(dentry);
+ if (!IS_ERR(fid)) {
+ spin_lock(&dent->lock);
+ list_del(&fid->dlist);
+ spin_unlock(&dent->lock);
}
- if(down_interruptible(&return_fid->lock))
- return ERR_PTR(-EINTR);
-
- return return_fid;
+ return fid;
}
+
/**
* v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
- * release it
+ * release it
* @dentry: dentry to look for fid in
*
* find a fid in the dentry and then clone to a new private fid
*
*/
-struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry)
+struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
{
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *base_fid, *new_fid = ERR_PTR(-EBADF);
- struct v9fs_fcall *fcall = NULL;
- int fid, err;
-
- base_fid = v9fs_fid_lookup(dentry);
-
- if(IS_ERR(base_fid))
- return base_fid;
-
- if(base_fid) { /* clone fid */
- fid = v9fs_get_idpool(&v9ses->fidpool);
- if (fid < 0) {
- eprintk(KERN_WARNING, "newfid fails!\n");
- new_fid = ERR_PTR(-ENOSPC);
- goto Release_Fid;
- }
-
- err = v9fs_t_walk(v9ses, base_fid->fid, fid, NULL, &fcall);
- if (err < 0) {
- dprintk(DEBUG_ERROR, "clone walk didn't work\n");
- v9fs_put_idpool(fid, &v9ses->fidpool);
- new_fid = ERR_PTR(err);
- goto Free_Fcall;
- }
- new_fid = v9fs_fid_create(v9ses, fid);
- if (new_fid == NULL) {
- dprintk(DEBUG_ERROR, "out of memory\n");
- new_fid = ERR_PTR(-ENOMEM);
- }
-Free_Fcall:
- kfree(fcall);
- }
+ struct p9_fid *ofid, *fid;
-Release_Fid:
- up(&base_fid->lock);
- return new_fid;
-}
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ ofid = v9fs_fid_lookup(dentry);
+ if (IS_ERR(ofid))
+ return ofid;
-void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid)
-{
- v9fs_t_clunk(v9ses, fid->fid);
- v9fs_fid_destroy(fid);
+ fid = p9_client_walk(ofid, 0, NULL, 1);
+ return fid;
}
#include <linux/list.h>
-#define FID_OP 0
-#define FID_WALK 1
-#define FID_CREATE 2
-
-struct v9fs_fid {
- struct list_head list; /* list of fids associated with a dentry */
- struct list_head active; /* XXX - debug */
-
- struct semaphore lock;
-
- u32 fid;
- unsigned char fidopen; /* set when fid is opened */
- unsigned char fidclunked; /* set when fid has already been clunked */
-
- struct v9fs_qid qid;
- u32 iounit;
-
- /* readdir stuff */
- int rdir_fpos;
- loff_t rdir_pos;
- struct v9fs_fcall *rdir_fcall;
-
- /* management stuff */
- uid_t uid; /* user associated with this fid */
-
- /* private data */
- struct file *filp; /* backpointer to File struct for open files */
- struct v9fs_session_info *v9ses; /* session info for this FID */
+struct v9fs_dentry {
+ spinlock_t lock; /* protect fidlist */
+ struct list_head fidlist;
};
-struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
-struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
-void v9fs_fid_destroy(struct v9fs_fid *fid);
-struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid);
-int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry);
-struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry);
-void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid);
-
+struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
+struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry);
+struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
+int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
+++ /dev/null
-/*
- * linux/fs/9p/mux.c
- *
- * Protocol Multiplexer
- *
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/poll.h>
-#include <linux/kthread.h>
-#include <linux/idr.h>
-#include <linux/mutex.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
-#include "transport.h"
-#include "mux.h"
-
-#define ERREQFLUSH 1
-#define SCHED_TIMEOUT 10
-#define MAXPOLLWADDR 2
-
-enum {
- Rworksched = 1, /* read work scheduled or running */
- Rpending = 2, /* can read */
- Wworksched = 4, /* write work scheduled or running */
- Wpending = 8, /* can write */
-};
-
-enum {
- None,
- Flushing,
- Flushed,
-};
-
-struct v9fs_mux_poll_task;
-
-struct v9fs_req {
- spinlock_t lock;
- int tag;
- struct v9fs_fcall *tcall;
- struct v9fs_fcall *rcall;
- int err;
- v9fs_mux_req_callback cb;
- void *cba;
- int flush;
- struct list_head req_list;
-};
-
-struct v9fs_mux_data {
- spinlock_t lock;
- struct list_head mux_list;
- struct v9fs_mux_poll_task *poll_task;
- int msize;
- unsigned char *extended;
- struct v9fs_transport *trans;
- struct v9fs_idpool tagpool;
- int err;
- wait_queue_head_t equeue;
- struct list_head req_list;
- struct list_head unsent_req_list;
- struct v9fs_fcall *rcall;
- int rpos;
- char *rbuf;
- int wpos;
- int wsize;
- char *wbuf;
- wait_queue_t poll_wait[MAXPOLLWADDR];
- wait_queue_head_t *poll_waddr[MAXPOLLWADDR];
- poll_table pt;
- struct work_struct rq;
- struct work_struct wq;
- unsigned long wsched;
-};
-
-struct v9fs_mux_poll_task {
- struct task_struct *task;
- struct list_head mux_list;
- int muxnum;
-};
-
-struct v9fs_mux_rpc {
- struct v9fs_mux_data *m;
- int err;
- struct v9fs_fcall *tcall;
- struct v9fs_fcall *rcall;
- wait_queue_head_t wqueue;
-};
-
-static int v9fs_poll_proc(void *);
-static void v9fs_read_work(struct work_struct *work);
-static void v9fs_write_work(struct work_struct *work);
-static void v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
- poll_table * p);
-static u16 v9fs_mux_get_tag(struct v9fs_mux_data *);
-static void v9fs_mux_put_tag(struct v9fs_mux_data *, u16);
-
-static DEFINE_MUTEX(v9fs_mux_task_lock);
-static struct workqueue_struct *v9fs_mux_wq;
-
-static int v9fs_mux_num;
-static int v9fs_mux_poll_task_num;
-static struct v9fs_mux_poll_task v9fs_mux_poll_tasks[100];
-
-int v9fs_mux_global_init(void)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++)
- v9fs_mux_poll_tasks[i].task = NULL;
-
- v9fs_mux_wq = create_workqueue("v9fs");
- if (!v9fs_mux_wq) {
- printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
- return -ENOMEM;
- }
-
- return 0;
-}
-
-void v9fs_mux_global_exit(void)
-{
- destroy_workqueue(v9fs_mux_wq);
-}
-
-/**
- * v9fs_mux_calc_poll_procs - calculates the number of polling procs
- * based on the number of mounted v9fs filesystems.
- *
- * The current implementation returns sqrt of the number of mounts.
- */
-static int v9fs_mux_calc_poll_procs(int muxnum)
-{
- int n;
-
- if (v9fs_mux_poll_task_num)
- n = muxnum / v9fs_mux_poll_task_num +
- (muxnum % v9fs_mux_poll_task_num ? 1 : 0);
- else
- n = 1;
-
- if (n > ARRAY_SIZE(v9fs_mux_poll_tasks))
- n = ARRAY_SIZE(v9fs_mux_poll_tasks);
-
- return n;
-}
-
-static int v9fs_mux_poll_start(struct v9fs_mux_data *m)
-{
- int i, n;
- struct v9fs_mux_poll_task *vpt, *vptlast;
- struct task_struct *pproc;
-
- dprintk(DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, v9fs_mux_num,
- v9fs_mux_poll_task_num);
- mutex_lock(&v9fs_mux_task_lock);
-
- n = v9fs_mux_calc_poll_procs(v9fs_mux_num + 1);
- if (n > v9fs_mux_poll_task_num) {
- for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
- if (v9fs_mux_poll_tasks[i].task == NULL) {
- vpt = &v9fs_mux_poll_tasks[i];
- dprintk(DEBUG_MUX, "create proc %p\n", vpt);
- pproc = kthread_create(v9fs_poll_proc, vpt,
- "v9fs-poll");
-
- if (!IS_ERR(pproc)) {
- vpt->task = pproc;
- INIT_LIST_HEAD(&vpt->mux_list);
- vpt->muxnum = 0;
- v9fs_mux_poll_task_num++;
- wake_up_process(vpt->task);
- }
- break;
- }
- }
-
- if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks))
- dprintk(DEBUG_ERROR, "warning: no free poll slots\n");
- }
-
- n = (v9fs_mux_num + 1) / v9fs_mux_poll_task_num +
- ((v9fs_mux_num + 1) % v9fs_mux_poll_task_num ? 1 : 0);
-
- vptlast = NULL;
- for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) {
- vpt = &v9fs_mux_poll_tasks[i];
- if (vpt->task != NULL) {
- vptlast = vpt;
- if (vpt->muxnum < n) {
- dprintk(DEBUG_MUX, "put in proc %d\n", i);
- list_add(&m->mux_list, &vpt->mux_list);
- vpt->muxnum++;
- m->poll_task = vpt;
- memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
- init_poll_funcptr(&m->pt, v9fs_pollwait);
- break;
- }
- }
- }
-
- if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks)) {
- if (vptlast == NULL)
- return -ENOMEM;
-
- dprintk(DEBUG_MUX, "put in proc %d\n", i);
- list_add(&m->mux_list, &vptlast->mux_list);
- vptlast->muxnum++;
- m->poll_task = vptlast;
- memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
- init_poll_funcptr(&m->pt, v9fs_pollwait);
- }
-
- v9fs_mux_num++;
- mutex_unlock(&v9fs_mux_task_lock);
-
- return 0;
-}
-
-static void v9fs_mux_poll_stop(struct v9fs_mux_data *m)
-{
- int i;
- struct v9fs_mux_poll_task *vpt;
-
- mutex_lock(&v9fs_mux_task_lock);
- vpt = m->poll_task;
- list_del(&m->mux_list);
- for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
- if (m->poll_waddr[i] != NULL) {
- remove_wait_queue(m->poll_waddr[i], &m->poll_wait[i]);
- m->poll_waddr[i] = NULL;
- }
- }
- vpt->muxnum--;
- if (!vpt->muxnum) {
- dprintk(DEBUG_MUX, "destroy proc %p\n", vpt);
- kthread_stop(vpt->task);
- vpt->task = NULL;
- v9fs_mux_poll_task_num--;
- }
- v9fs_mux_num--;
- mutex_unlock(&v9fs_mux_task_lock);
-}
-
-/**
- * v9fs_mux_init - allocate and initialize the per-session mux data
- * Creates the polling task if this is the first session.
- *
- * @trans - transport structure
- * @msize - maximum message size
- * @extended - pointer to the extended flag
- */
-struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
- unsigned char *extended)
-{
- int i, n;
- struct v9fs_mux_data *m, *mtmp;
-
- dprintk(DEBUG_MUX, "transport %p msize %d\n", trans, msize);
- m = kmalloc(sizeof(struct v9fs_mux_data), GFP_KERNEL);
- if (!m)
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&m->lock);
- INIT_LIST_HEAD(&m->mux_list);
- m->msize = msize;
- m->extended = extended;
- m->trans = trans;
- idr_init(&m->tagpool.pool);
- init_MUTEX(&m->tagpool.lock);
- m->err = 0;
- init_waitqueue_head(&m->equeue);
- INIT_LIST_HEAD(&m->req_list);
- INIT_LIST_HEAD(&m->unsent_req_list);
- m->rcall = NULL;
- m->rpos = 0;
- m->rbuf = NULL;
- m->wpos = m->wsize = 0;
- m->wbuf = NULL;
- INIT_WORK(&m->rq, v9fs_read_work);
- INIT_WORK(&m->wq, v9fs_write_work);
- m->wsched = 0;
- memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
- m->poll_task = NULL;
- n = v9fs_mux_poll_start(m);
- if (n)
- return ERR_PTR(n);
-
- n = trans->poll(trans, &m->pt);
- if (n & POLLIN) {
- dprintk(DEBUG_MUX, "mux %p can read\n", m);
- set_bit(Rpending, &m->wsched);
- }
-
- if (n & POLLOUT) {
- dprintk(DEBUG_MUX, "mux %p can write\n", m);
- set_bit(Wpending, &m->wsched);
- }
-
- for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
- if (IS_ERR(m->poll_waddr[i])) {
- v9fs_mux_poll_stop(m);
- mtmp = (void *)m->poll_waddr; /* the error code */
- kfree(m);
- m = mtmp;
- break;
- }
- }
-
- return m;
-}
-
-/**
- * v9fs_mux_destroy - cancels all pending requests and frees mux resources
- */
-void v9fs_mux_destroy(struct v9fs_mux_data *m)
-{
- dprintk(DEBUG_MUX, "mux %p prev %p next %p\n", m,
- m->mux_list.prev, m->mux_list.next);
- v9fs_mux_cancel(m, -ECONNRESET);
-
- if (!list_empty(&m->req_list)) {
- /* wait until all processes waiting on this session exit */
- dprintk(DEBUG_MUX, "mux %p waiting for empty request queue\n",
- m);
- wait_event_timeout(m->equeue, (list_empty(&m->req_list)), 5000);
- dprintk(DEBUG_MUX, "mux %p request queue empty: %d\n", m,
- list_empty(&m->req_list));
- }
-
- v9fs_mux_poll_stop(m);
- m->trans = NULL;
-
- kfree(m);
-}
-
-/**
- * v9fs_pollwait - called by files poll operation to add v9fs-poll task
- * to files wait queue
- */
-static void
-v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address,
- poll_table * p)
-{
- int i;
- struct v9fs_mux_data *m;
-
- m = container_of(p, struct v9fs_mux_data, pt);
- for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++)
- if (m->poll_waddr[i] == NULL)
- break;
-
- if (i >= ARRAY_SIZE(m->poll_waddr)) {
- dprintk(DEBUG_ERROR, "not enough wait_address slots\n");
- return;
- }
-
- m->poll_waddr[i] = wait_address;
-
- if (!wait_address) {
- dprintk(DEBUG_ERROR, "no wait_address\n");
- m->poll_waddr[i] = ERR_PTR(-EIO);
- return;
- }
-
- init_waitqueue_entry(&m->poll_wait[i], m->poll_task->task);
- add_wait_queue(wait_address, &m->poll_wait[i]);
-}
-
-/**
- * v9fs_poll_mux - polls a mux and schedules read or write works if necessary
- */
-static void v9fs_poll_mux(struct v9fs_mux_data *m)
-{
- int n;
-
- if (m->err < 0)
- return;
-
- n = m->trans->poll(m->trans, NULL);
- if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) {
- dprintk(DEBUG_MUX, "error mux %p err %d\n", m, n);
- if (n >= 0)
- n = -ECONNRESET;
- v9fs_mux_cancel(m, n);
- }
-
- if (n & POLLIN) {
- set_bit(Rpending, &m->wsched);
- dprintk(DEBUG_MUX, "mux %p can read\n", m);
- if (!test_and_set_bit(Rworksched, &m->wsched)) {
- dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
- queue_work(v9fs_mux_wq, &m->rq);
- }
- }
-
- if (n & POLLOUT) {
- set_bit(Wpending, &m->wsched);
- dprintk(DEBUG_MUX, "mux %p can write\n", m);
- if ((m->wsize || !list_empty(&m->unsent_req_list))
- && !test_and_set_bit(Wworksched, &m->wsched)) {
- dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
- queue_work(v9fs_mux_wq, &m->wq);
- }
- }
-}
-
-/**
- * v9fs_poll_proc - polls all v9fs transports for new events and queues
- * the appropriate work to the work queue
- */
-static int v9fs_poll_proc(void *a)
-{
- struct v9fs_mux_data *m, *mtmp;
- struct v9fs_mux_poll_task *vpt;
-
- vpt = a;
- dprintk(DEBUG_MUX, "start %p %p\n", current, vpt);
- while (!kthread_should_stop()) {
- set_current_state(TASK_INTERRUPTIBLE);
-
- list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
- v9fs_poll_mux(m);
- }
-
- dprintk(DEBUG_MUX, "sleeping...\n");
- schedule_timeout(SCHED_TIMEOUT * HZ);
- }
-
- __set_current_state(TASK_RUNNING);
- dprintk(DEBUG_MUX, "finish\n");
- return 0;
-}
-
-/**
- * v9fs_write_work - called when a transport can send some data
- */
-static void v9fs_write_work(struct work_struct *work)
-{
- int n, err;
- struct v9fs_mux_data *m;
- struct v9fs_req *req;
-
- m = container_of(work, struct v9fs_mux_data, wq);
-
- if (m->err < 0) {
- clear_bit(Wworksched, &m->wsched);
- return;
- }
-
- if (!m->wsize) {
- if (list_empty(&m->unsent_req_list)) {
- clear_bit(Wworksched, &m->wsched);
- return;
- }
-
- spin_lock(&m->lock);
-again:
- req = list_entry(m->unsent_req_list.next, struct v9fs_req,
- req_list);
- list_move_tail(&req->req_list, &m->req_list);
- if (req->err == ERREQFLUSH)
- goto again;
-
- m->wbuf = req->tcall->sdata;
- m->wsize = req->tcall->size;
- m->wpos = 0;
- dump_data(m->wbuf, m->wsize);
- spin_unlock(&m->lock);
- }
-
- dprintk(DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos, m->wsize);
- clear_bit(Wpending, &m->wsched);
- err = m->trans->write(m->trans, m->wbuf + m->wpos, m->wsize - m->wpos);
- dprintk(DEBUG_MUX, "mux %p sent %d bytes\n", m, err);
- if (err == -EAGAIN) {
- clear_bit(Wworksched, &m->wsched);
- return;
- }
-
- if (err <= 0)
- goto error;
-
- m->wpos += err;
- if (m->wpos == m->wsize)
- m->wpos = m->wsize = 0;
-
- if (m->wsize == 0 && !list_empty(&m->unsent_req_list)) {
- if (test_and_clear_bit(Wpending, &m->wsched))
- n = POLLOUT;
- else
- n = m->trans->poll(m->trans, NULL);
-
- if (n & POLLOUT) {
- dprintk(DEBUG_MUX, "schedule write work mux %p\n", m);
- queue_work(v9fs_mux_wq, &m->wq);
- } else
- clear_bit(Wworksched, &m->wsched);
- } else
- clear_bit(Wworksched, &m->wsched);
-
- return;
-
- error:
- v9fs_mux_cancel(m, err);
- clear_bit(Wworksched, &m->wsched);
-}
-
-static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
- int ecode;
- struct v9fs_str *ename;
-
- if (!req->err && req->rcall->id == RERROR) {
- ecode = req->rcall->params.rerror.errno;
- ename = &req->rcall->params.rerror.error;
-
- dprintk(DEBUG_MUX, "Rerror %.*s\n", ename->len, ename->str);
-
- if (*m->extended)
- req->err = -ecode;
-
- if (!req->err) {
- req->err = v9fs_errstr2errno(ename->str, ename->len);
-
- if (!req->err) { /* string match failed */
- PRINT_FCALL_ERROR("unknown error", req->rcall);
- }
-
- if (!req->err)
- req->err = -ESERVERFAULT;
- }
- } else if (req->tcall && req->rcall->id != req->tcall->id + 1) {
- dprintk(DEBUG_ERROR, "fcall mismatch: expected %d, got %d\n",
- req->tcall->id + 1, req->rcall->id);
- if (!req->err)
- req->err = -EIO;
- }
-}
-
-/**
- * v9fs_read_work - called when there is some data to be read from a transport
- */
-static void v9fs_read_work(struct work_struct *work)
-{
- int n, err;
- struct v9fs_mux_data *m;
- struct v9fs_req *req, *rptr, *rreq;
- struct v9fs_fcall *rcall;
- char *rbuf;
-
- m = container_of(work, struct v9fs_mux_data, rq);
-
- if (m->err < 0)
- return;
-
- rcall = NULL;
- dprintk(DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos);
-
- if (!m->rcall) {
- m->rcall =
- kmalloc(sizeof(struct v9fs_fcall) + m->msize, GFP_KERNEL);
- if (!m->rcall) {
- err = -ENOMEM;
- goto error;
- }
-
- m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
- m->rpos = 0;
- }
-
- clear_bit(Rpending, &m->wsched);
- err = m->trans->read(m->trans, m->rbuf + m->rpos, m->msize - m->rpos);
- dprintk(DEBUG_MUX, "mux %p got %d bytes\n", m, err);
- if (err == -EAGAIN) {
- clear_bit(Rworksched, &m->wsched);
- return;
- }
-
- if (err <= 0)
- goto error;
-
- m->rpos += err;
- while (m->rpos > 4) {
- n = le32_to_cpu(*(__le32 *) m->rbuf);
- if (n >= m->msize) {
- dprintk(DEBUG_ERROR,
- "requested packet size too big: %d\n", n);
- err = -EIO;
- goto error;
- }
-
- if (m->rpos < n)
- break;
-
- dump_data(m->rbuf, n);
- err =
- v9fs_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended);
- if (err < 0) {
- goto error;
- }
-
- if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
- char buf[150];
-
- v9fs_printfcall(buf, sizeof(buf), m->rcall,
- *m->extended);
- printk(KERN_NOTICE ">>> %p %s\n", m, buf);
- }
-
- rcall = m->rcall;
- rbuf = m->rbuf;
- if (m->rpos > n) {
- m->rcall = kmalloc(sizeof(struct v9fs_fcall) + m->msize,
- GFP_KERNEL);
- if (!m->rcall) {
- err = -ENOMEM;
- goto error;
- }
-
- m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall);
- memmove(m->rbuf, rbuf + n, m->rpos - n);
- m->rpos -= n;
- } else {
- m->rcall = NULL;
- m->rbuf = NULL;
- m->rpos = 0;
- }
-
- dprintk(DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, rcall->id,
- rcall->tag);
-
- req = NULL;
- spin_lock(&m->lock);
- list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
- if (rreq->tag == rcall->tag) {
- req = rreq;
- if (req->flush != Flushing)
- list_del(&req->req_list);
- break;
- }
- }
- spin_unlock(&m->lock);
-
- if (req) {
- req->rcall = rcall;
- process_request(m, req);
-
- if (req->flush != Flushing) {
- if (req->cb)
- (*req->cb) (req, req->cba);
- else
- kfree(req->rcall);
-
- wake_up(&m->equeue);
- }
- } else {
- if (err >= 0 && rcall->id != RFLUSH)
- dprintk(DEBUG_ERROR,
- "unexpected response mux %p id %d tag %d\n",
- m, rcall->id, rcall->tag);
- kfree(rcall);
- }
- }
-
- if (!list_empty(&m->req_list)) {
- if (test_and_clear_bit(Rpending, &m->wsched))
- n = POLLIN;
- else
- n = m->trans->poll(m->trans, NULL);
-
- if (n & POLLIN) {
- dprintk(DEBUG_MUX, "schedule read work mux %p\n", m);
- queue_work(v9fs_mux_wq, &m->rq);
- } else
- clear_bit(Rworksched, &m->wsched);
- } else
- clear_bit(Rworksched, &m->wsched);
-
- return;
-
- error:
- v9fs_mux_cancel(m, err);
- clear_bit(Rworksched, &m->wsched);
-}
-
-/**
- * v9fs_send_request - send 9P request
- * The function can sleep until the request is scheduled for sending.
- * The function can be interrupted. Return from the function is not
- * a guarantee that the request is sent successfully. Can return errors
- * that can be retrieved by PTR_ERR macros.
- *
- * @m: mux data
- * @tc: request to be sent
- * @cb: callback function to call when response is received
- * @cba: parameter to pass to the callback function
- */
-static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m,
- struct v9fs_fcall *tc,
- v9fs_mux_req_callback cb, void *cba)
-{
- int n;
- struct v9fs_req *req;
-
- dprintk(DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current,
- tc, tc->id);
- if (m->err < 0)
- return ERR_PTR(m->err);
-
- req = kmalloc(sizeof(struct v9fs_req), GFP_KERNEL);
- if (!req)
- return ERR_PTR(-ENOMEM);
-
- if (tc->id == TVERSION)
- n = V9FS_NOTAG;
- else
- n = v9fs_mux_get_tag(m);
-
- if (n < 0)
- return ERR_PTR(-ENOMEM);
-
- v9fs_set_tag(tc, n);
- if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) {
- char buf[150];
-
- v9fs_printfcall(buf, sizeof(buf), tc, *m->extended);
- printk(KERN_NOTICE "<<< %p %s\n", m, buf);
- }
-
- spin_lock_init(&req->lock);
- req->tag = n;
- req->tcall = tc;
- req->rcall = NULL;
- req->err = 0;
- req->cb = cb;
- req->cba = cba;
- req->flush = None;
-
- spin_lock(&m->lock);
- list_add_tail(&req->req_list, &m->unsent_req_list);
- spin_unlock(&m->lock);
-
- if (test_and_clear_bit(Wpending, &m->wsched))
- n = POLLOUT;
- else
- n = m->trans->poll(m->trans, NULL);
-
- if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched))
- queue_work(v9fs_mux_wq, &m->wq);
-
- return req;
-}
-
-static void v9fs_mux_free_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
- v9fs_mux_put_tag(m, req->tag);
- kfree(req);
-}
-
-static void v9fs_mux_flush_cb(struct v9fs_req *freq, void *a)
-{
- v9fs_mux_req_callback cb;
- int tag;
- struct v9fs_mux_data *m;
- struct v9fs_req *req, *rreq, *rptr;
-
- m = a;
- dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m,
- freq->tcall, freq->rcall, freq->err,
- freq->tcall->params.tflush.oldtag);
-
- spin_lock(&m->lock);
- cb = NULL;
- tag = freq->tcall->params.tflush.oldtag;
- req = NULL;
- list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
- if (rreq->tag == tag) {
- req = rreq;
- list_del(&req->req_list);
- break;
- }
- }
- spin_unlock(&m->lock);
-
- if (req) {
- spin_lock(&req->lock);
- req->flush = Flushed;
- spin_unlock(&req->lock);
-
- if (req->cb)
- (*req->cb) (req, req->cba);
- else
- kfree(req->rcall);
-
- wake_up(&m->equeue);
- }
-
- kfree(freq->tcall);
- kfree(freq->rcall);
- v9fs_mux_free_request(m, freq);
-}
-
-static int
-v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req)
-{
- struct v9fs_fcall *fc;
- struct v9fs_req *rreq, *rptr;
-
- dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
-
- /* if a response was received for a request, do nothing */
- spin_lock(&req->lock);
- if (req->rcall || req->err) {
- spin_unlock(&req->lock);
- dprintk(DEBUG_MUX, "mux %p req %p response already received\n", m, req);
- return 0;
- }
-
- req->flush = Flushing;
- spin_unlock(&req->lock);
-
- spin_lock(&m->lock);
- /* if the request is not sent yet, just remove it from the list */
- list_for_each_entry_safe(rreq, rptr, &m->unsent_req_list, req_list) {
- if (rreq->tag == req->tag) {
- dprintk(DEBUG_MUX, "mux %p req %p request is not sent yet\n", m, req);
- list_del(&rreq->req_list);
- req->flush = Flushed;
- spin_unlock(&m->lock);
- if (req->cb)
- (*req->cb) (req, req->cba);
- return 0;
- }
- }
- spin_unlock(&m->lock);
-
- clear_thread_flag(TIF_SIGPENDING);
- fc = v9fs_create_tflush(req->tag);
- v9fs_send_request(m, fc, v9fs_mux_flush_cb, m);
- return 1;
-}
-
-static void
-v9fs_mux_rpc_cb(struct v9fs_req *req, void *a)
-{
- struct v9fs_mux_rpc *r;
-
- dprintk(DEBUG_MUX, "req %p r %p\n", req, a);
- r = a;
- r->rcall = req->rcall;
- r->err = req->err;
-
- if (req->flush!=None && !req->err)
- r->err = -ERESTARTSYS;
-
- wake_up(&r->wqueue);
-}
-
-/**
- * v9fs_mux_rpc - sends 9P request and waits until a response is available.
- * The function can be interrupted.
- * @m: mux data
- * @tc: request to be sent
- * @rc: pointer where a pointer to the response is stored
- */
-int
-v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
- struct v9fs_fcall **rc)
-{
- int err, sigpending;
- unsigned long flags;
- struct v9fs_req *req;
- struct v9fs_mux_rpc r;
-
- r.err = 0;
- r.tcall = tc;
- r.rcall = NULL;
- r.m = m;
- init_waitqueue_head(&r.wqueue);
-
- if (rc)
- *rc = NULL;
-
- sigpending = 0;
- if (signal_pending(current)) {
- sigpending = 1;
- clear_thread_flag(TIF_SIGPENDING);
- }
-
- req = v9fs_send_request(m, tc, v9fs_mux_rpc_cb, &r);
- if (IS_ERR(req)) {
- err = PTR_ERR(req);
- dprintk(DEBUG_MUX, "error %d\n", err);
- return err;
- }
-
- err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
- if (r.err < 0)
- err = r.err;
-
- if (err == -ERESTARTSYS && m->trans->status == Connected && m->err == 0) {
- if (v9fs_mux_flush_request(m, req)) {
- /* wait until we get response of the flush message */
- do {
- clear_thread_flag(TIF_SIGPENDING);
- err = wait_event_interruptible(r.wqueue,
- r.rcall || r.err);
- } while (!r.rcall && !r.err && err==-ERESTARTSYS &&
- m->trans->status==Connected && !m->err);
-
- err = -ERESTARTSYS;
- }
- sigpending = 1;
- }
-
- if (sigpending) {
- spin_lock_irqsave(¤t->sighand->siglock, flags);
- recalc_sigpending();
- spin_unlock_irqrestore(¤t->sighand->siglock, flags);
- }
-
- if (rc)
- *rc = r.rcall;
- else
- kfree(r.rcall);
-
- v9fs_mux_free_request(m, req);
- if (err > 0)
- err = -EIO;
-
- return err;
-}
-
-#if 0
-/**
- * v9fs_mux_rpcnb - sends 9P request without waiting for response.
- * @m: mux data
- * @tc: request to be sent
- * @cb: callback function to be called when response arrives
- * @cba: value to pass to the callback function
- */
-int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
- v9fs_mux_req_callback cb, void *a)
-{
- int err;
- struct v9fs_req *req;
-
- req = v9fs_send_request(m, tc, cb, a);
- if (IS_ERR(req)) {
- err = PTR_ERR(req);
- dprintk(DEBUG_MUX, "error %d\n", err);
- return PTR_ERR(req);
- }
-
- dprintk(DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag);
- return 0;
-}
-#endif /* 0 */
-
-/**
- * v9fs_mux_cancel - cancel all pending requests with error
- * @m: mux data
- * @err: error code
- */
-void v9fs_mux_cancel(struct v9fs_mux_data *m, int err)
-{
- struct v9fs_req *req, *rtmp;
- LIST_HEAD(cancel_list);
-
- dprintk(DEBUG_ERROR, "mux %p err %d\n", m, err);
- m->err = err;
- spin_lock(&m->lock);
- list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) {
- list_move(&req->req_list, &cancel_list);
- }
- list_for_each_entry_safe(req, rtmp, &m->unsent_req_list, req_list) {
- list_move(&req->req_list, &cancel_list);
- }
- spin_unlock(&m->lock);
-
- list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) {
- list_del(&req->req_list);
- if (!req->err)
- req->err = err;
-
- if (req->cb)
- (*req->cb) (req, req->cba);
- else
- kfree(req->rcall);
- }
-
- wake_up(&m->equeue);
-}
-
-static u16 v9fs_mux_get_tag(struct v9fs_mux_data *m)
-{
- int tag;
-
- tag = v9fs_get_idpool(&m->tagpool);
- if (tag < 0)
- return V9FS_NOTAG;
- else
- return (u16) tag;
-}
-
-static void v9fs_mux_put_tag(struct v9fs_mux_data *m, u16 tag)
-{
- if (tag != V9FS_NOTAG && v9fs_check_idpool(tag, &m->tagpool))
- v9fs_put_idpool(tag, &m->tagpool);
-}
+++ /dev/null
-/*
- * linux/fs/9p/mux.h
- *
- * Multiplexer Definitions
- *
- * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-struct v9fs_mux_data;
-struct v9fs_req;
-
-/**
- * v9fs_mux_req_callback - callback function that is called when the
- * response of a request is received. The callback is called from
- * a workqueue and shouldn't block.
- *
- * @a - the pointer that was specified when the request was send to be
- * passed to the callback
- * @tc - request call
- * @rc - response call
- * @err - error code (non-zero if error occured)
- */
-typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a);
-
-int v9fs_mux_global_init(void);
-void v9fs_mux_global_exit(void);
-
-struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
- unsigned char *extended);
-void v9fs_mux_destroy(struct v9fs_mux_data *);
-
-int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
-struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
-int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
-
-void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
-void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);
-int v9fs_errstr2errno(char *errstr, int len);
+++ /dev/null
-/*
- * linux/fs/9p/trans_fd.c
- *
- * Fd transport layer. Includes deprecated socket layer.
- *
- * Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
- * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/in.h>
-#include <linux/module.h>
-#include <linux/net.h>
-#include <linux/ipv6.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/un.h>
-#include <asm/uaccess.h>
-#include <linux/inet.h>
-#include <linux/idr.h>
-#include <linux/file.h>
-
-#include "debug.h"
-#include "v9fs.h"
-#include "transport.h"
-
-#define V9FS_PORT 564
-
-struct v9fs_trans_fd {
- struct file *rd;
- struct file *wr;
-};
-
-/**
- * v9fs_fd_read- read from a fd
- * @v9ses: session information
- * @v: buffer to receive data into
- * @len: size of receive buffer
- *
- */
-static int v9fs_fd_read(struct v9fs_transport *trans, void *v, int len)
-{
- int ret;
- struct v9fs_trans_fd *ts;
-
- if (!trans || trans->status == Disconnected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!(ts->rd->f_flags & O_NONBLOCK))
- dprintk(DEBUG_ERROR, "blocking read ...\n");
-
- ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
- if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
- trans->status = Disconnected;
- return ret;
-}
-
-/**
- * v9fs_fd_write - write to a socket
- * @v9ses: session information
- * @v: buffer to send data from
- * @len: size of send buffer
- *
- */
-static int v9fs_fd_write(struct v9fs_transport *trans, void *v, int len)
-{
- int ret;
- mm_segment_t oldfs;
- struct v9fs_trans_fd *ts;
-
- if (!trans || trans->status == Disconnected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!(ts->wr->f_flags & O_NONBLOCK))
- dprintk(DEBUG_ERROR, "blocking write ...\n");
-
- oldfs = get_fs();
- set_fs(get_ds());
- /* The cast to a user pointer is valid due to the set_fs() */
- ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
- set_fs(oldfs);
-
- if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
- trans->status = Disconnected;
- return ret;
-}
-
-static unsigned int
-v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt)
-{
- int ret, n;
- struct v9fs_trans_fd *ts;
- mm_segment_t oldfs;
-
- if (!trans || trans->status != Connected || !(ts = trans->priv))
- return -EREMOTEIO;
-
- if (!ts->rd->f_op || !ts->rd->f_op->poll)
- return -EIO;
-
- if (!ts->wr->f_op || !ts->wr->f_op->poll)
- return -EIO;
-
- oldfs = get_fs();
- set_fs(get_ds());
-
- ret = ts->rd->f_op->poll(ts->rd, pt);
- if (ret < 0)
- goto end;
-
- if (ts->rd != ts->wr) {
- n = ts->wr->f_op->poll(ts->wr, pt);
- if (n < 0) {
- ret = n;
- goto end;
- }
- ret = (ret & ~POLLOUT) | (n & ~POLLIN);
- }
-
- end:
- set_fs(oldfs);
- return ret;
-}
-
-static int v9fs_fd_open(struct v9fs_session_info *v9ses, int rfd, int wfd)
-{
- struct v9fs_transport *trans = v9ses->transport;
- struct v9fs_trans_fd *ts = kmalloc(sizeof(struct v9fs_trans_fd),
- GFP_KERNEL);
- if (!ts)
- return -ENOMEM;
-
- ts->rd = fget(rfd);
- ts->wr = fget(wfd);
- if (!ts->rd || !ts->wr) {
- if (ts->rd)
- fput(ts->rd);
- if (ts->wr)
- fput(ts->wr);
- kfree(ts);
- return -EIO;
- }
-
- trans->priv = ts;
- trans->status = Connected;
-
- return 0;
-}
-
-static int v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr,
- char *data)
-{
- if (v9ses->rfdno == ~0 || v9ses->wfdno == ~0) {
- printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
- return -ENOPROTOOPT;
- }
-
- return v9fs_fd_open(v9ses, v9ses->rfdno, v9ses->wfdno);
-}
-
-static int v9fs_socket_open(struct v9fs_session_info *v9ses,
- struct socket *csocket)
-{
- int fd, ret;
-
- csocket->sk->sk_allocation = GFP_NOIO;
- if ((fd = sock_map_fd(csocket)) < 0) {
- eprintk(KERN_ERR, "v9fs_socket_open: failed to map fd\n");
- ret = fd;
- release_csocket:
- sock_release(csocket);
- return ret;
- }
-
- if ((ret = v9fs_fd_open(v9ses, fd, fd)) < 0) {
- sockfd_put(csocket);
- eprintk(KERN_ERR, "v9fs_socket_open: failed to open fd\n");
- goto release_csocket;
- }
-
- ((struct v9fs_trans_fd *)v9ses->transport->priv)->rd->f_flags |=
- O_NONBLOCK;
- return 0;
-}
-
-static int v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr,
- char *data)
-{
- int ret;
- struct socket *csocket = NULL;
- struct sockaddr_in sin_server;
-
- sin_server.sin_family = AF_INET;
- sin_server.sin_addr.s_addr = in_aton(addr);
- sin_server.sin_port = htons(v9ses->port);
- sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
-
- if (!csocket) {
- eprintk(KERN_ERR, "v9fs_trans_tcp: problem creating socket\n");
- return -1;
- }
-
- ret = csocket->ops->connect(csocket,
- (struct sockaddr *)&sin_server,
- sizeof(struct sockaddr_in), 0);
- if (ret < 0) {
- eprintk(KERN_ERR,
- "v9fs_trans_tcp: problem connecting socket to %s\n",
- addr);
- return ret;
- }
-
- return v9fs_socket_open(v9ses, csocket);
-}
-
-static int
-v9fs_unix_init(struct v9fs_session_info *v9ses, const char *addr, char *data)
-{
- int ret;
- struct socket *csocket;
- struct sockaddr_un sun_server;
-
- if (strlen(addr) > UNIX_PATH_MAX) {
- eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n",
- addr);
- return -ENAMETOOLONG;
- }
-
- sun_server.sun_family = PF_UNIX;
- strcpy(sun_server.sun_path, addr);
- sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
- ret = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
- sizeof(struct sockaddr_un) - 1, 0);
- if (ret < 0) {
- eprintk(KERN_ERR,
- "v9fs_trans_unix: problem connecting socket: %s: %d\n",
- addr, ret);
- return ret;
- }
-
- return v9fs_socket_open(v9ses, csocket);
-}
-
-/**
- * v9fs_sock_close - shutdown socket
- * @trans: private socket structure
- *
- */
-static void v9fs_fd_close(struct v9fs_transport *trans)
-{
- struct v9fs_trans_fd *ts;
-
- if (!trans)
- return;
-
- ts = xchg(&trans->priv, NULL);
-
- if (!ts)
- return;
-
- trans->status = Disconnected;
- if (ts->rd)
- fput(ts->rd);
- if (ts->wr)
- fput(ts->wr);
- kfree(ts);
-}
-
-struct v9fs_transport v9fs_trans_fd = {
- .init = v9fs_fd_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_tcp = {
- .init = v9fs_tcp_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
-
-struct v9fs_transport v9fs_trans_unix = {
- .init = v9fs_unix_init,
- .write = v9fs_fd_write,
- .read = v9fs_fd_read,
- .close = v9fs_fd_close,
- .poll = v9fs_fd_poll,
-};
+++ /dev/null
-/*
- * linux/fs/9p/transport.h
- *
- * Transport Definition
- *
- * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-enum v9fs_transport_status {
- Connected,
- Disconnected,
- Hung,
-};
-
-struct v9fs_transport {
- enum v9fs_transport_status status;
- void *priv;
-
- int (*init) (struct v9fs_session_info *, const char *, char *);
- int (*write) (struct v9fs_transport *, void *, int);
- int (*read) (struct v9fs_transport *, void *, int);
- void (*close) (struct v9fs_transport *);
- unsigned int (*poll)(struct v9fs_transport *, struct poll_table_struct *);
-};
-
-extern struct v9fs_transport v9fs_trans_tcp;
-extern struct v9fs_transport v9fs_trans_unix;
-extern struct v9fs_transport v9fs_trans_fd;
#include <linux/sched.h>
#include <linux/parser.h>
#include <linux/idr.h>
-
-#include "debug.h"
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+#include <net/9p/conn.h>
+#include <net/9p/client.h>
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
-#include "transport.h"
-#include "mux.h"
-
-/* TODO: sysfs or debugfs interface */
-int v9fs_debug_level = 0; /* feature-rific global debug level */
/*
* Option Parsing (code inspired by NFS code)
enum {
/* Options that take integer arguments */
- Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug,
+ Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid,
Opt_rfdno, Opt_wfdno,
/* String options */
Opt_uname, Opt_remotename,
/* Options that take no arguments */
- Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
+ Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, Opt_pci,
/* Cache options */
Opt_cache_loose,
/* Error token */
{Opt_afid, "afid=%u"},
{Opt_rfdno, "rfdno=%u"},
{Opt_wfdno, "wfdno=%u"},
- {Opt_debug, "debug=%x"},
{Opt_uname, "uname=%s"},
{Opt_remotename, "aname=%s"},
{Opt_unix, "proto=unix"},
{Opt_tcp, "proto=tcp"},
{Opt_fd, "proto=fd"},
+#ifdef CONFIG_PCI_9P
+ {Opt_pci, "proto=pci"},
+#endif
{Opt_tcp, "tcp"},
{Opt_unix, "unix"},
{Opt_fd, "fd"},
{Opt_err, NULL}
};
+extern struct p9_transport *p9pci_trans_create(void);
+
/*
* Parse option string.
*/
token = match_token(p, tokens, args);
if (token < Opt_uname) {
if ((ret = match_int(&args[0], &option)) < 0) {
- dprintk(DEBUG_ERROR,
+ P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
continue;
}
case Opt_wfdno:
v9ses->wfdno = option;
break;
- case Opt_debug:
- v9ses->debug = option;
- break;
case Opt_tcp:
v9ses->proto = PROTO_TCP;
break;
case Opt_unix:
v9ses->proto = PROTO_UNIX;
break;
+ case Opt_pci:
+ v9ses->proto = PROTO_PCI;
+ break;
case Opt_fd:
v9ses->proto = PROTO_FD;
break;
}
}
-/**
- * v9fs_inode2v9ses - safely extract v9fs session info from super block
- * @inode: inode to extract information from
- *
- * Paranoid function to extract v9ses information from superblock,
- * if anything is missing it will report an error.
- *
- */
-
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
-{
- return (inode->i_sb->s_fs_info);
-}
-
-/**
- * v9fs_get_idpool - allocate numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- * the lock included in struct idr?
- */
-
-int v9fs_get_idpool(struct v9fs_idpool *p)
-{
- int i = 0;
- int error;
-
-retry:
- if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
- return 0;
-
- if (down_interruptible(&p->lock) == -EINTR) {
- eprintk(KERN_WARNING, "Interrupted while locking\n");
- return -1;
- }
-
- /* no need to store exactly p, we just need something non-null */
- error = idr_get_new(&p->pool, p, &i);
- up(&p->lock);
-
- if (error == -EAGAIN)
- goto retry;
- else if (error)
- return -1;
-
- return i;
-}
-
-/**
- * v9fs_put_idpool - release numeric id from pool
- * @p - pool to allocate from
- *
- * XXX - This seems to be an awful generic function, should it be in idr.c with
- * the lock included in struct idr?
- */
-
-void v9fs_put_idpool(int id, struct v9fs_idpool *p)
-{
- if (down_interruptible(&p->lock) == -EINTR) {
- eprintk(KERN_WARNING, "Interrupted while locking\n");
- return;
- }
- idr_remove(&p->pool, id);
- up(&p->lock);
-}
-
-/**
- * v9fs_check_idpool - check if the specified id is available
- * @id - id to check
- * @p - pool
- */
-int v9fs_check_idpool(int id, struct v9fs_idpool *p)
-{
- return idr_find(&p->pool, id) != NULL;
-}
-
/**
* v9fs_session_init - initialize session
* @v9ses: session information structure
*
*/
-int
-v9fs_session_init(struct v9fs_session_info *v9ses,
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
const char *dev_name, char *data)
{
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_transport *trans_proto;
- int n = 0;
- int newfid = -1;
int retval = -EINVAL;
- struct v9fs_str *version;
+ struct p9_transport *trans;
+ struct p9_fid *fid;
v9ses->name = __getname();
if (!v9ses->name)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
v9ses->remotename = __getname();
if (!v9ses->remotename) {
__putname(v9ses->name);
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
strcpy(v9ses->name, V9FS_DEFUSER);
v9fs_parse_options(data, v9ses);
- /* set global debug level */
- v9fs_debug_level = v9ses->debug;
-
- /* id pools that are session-dependent: fids and tags */
- idr_init(&v9ses->fidpool.pool);
- init_MUTEX(&v9ses->fidpool.lock);
-
switch (v9ses->proto) {
case PROTO_TCP:
- trans_proto = &v9fs_trans_tcp;
+ trans = p9_trans_create_tcp(dev_name, v9ses->port);
break;
case PROTO_UNIX:
- trans_proto = &v9fs_trans_unix;
+ trans = p9_trans_create_unix(dev_name);
*v9ses->remotename = 0;
break;
case PROTO_FD:
- trans_proto = &v9fs_trans_fd;
+ trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno);
+ *v9ses->remotename = 0;
+ break;
+#ifdef CONFIG_PCI_9P
+ case PROTO_PCI:
+ trans = p9pci_trans_create();
*v9ses->remotename = 0;
break;
+#endif
default:
printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto);
retval = -ENOPROTOOPT;
- goto SessCleanUp;
+ goto error;
};
- v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL);
- if (!v9ses->transport) {
- retval = -ENOMEM;
- goto SessCleanUp;
+ if (IS_ERR(trans)) {
+ retval = PTR_ERR(trans);
+ trans = NULL;
+ goto error;
}
- memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport));
+ v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ,
+ v9ses->extended);
- if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) {
- eprintk(KERN_ERR, "problem initializing transport\n");
- goto SessCleanUp;
+ if (IS_ERR(v9ses->clnt)) {
+ retval = PTR_ERR(v9ses->clnt);
+ v9ses->clnt = NULL;
+ P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n");
+ goto error;
}
- v9ses->inprogress = 0;
- v9ses->shutdown = 0;
- v9ses->session_hung = 0;
-
- v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ,
- &v9ses->extended);
-
- if (IS_ERR(v9ses->mux)) {
- retval = PTR_ERR(v9ses->mux);
- v9ses->mux = NULL;
- dprintk(DEBUG_ERROR, "problem initializing mux\n");
- goto SessCleanUp;
+ fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name,
+ v9ses->remotename);
+ if (IS_ERR(fid)) {
+ retval = PTR_ERR(fid);
+ fid = NULL;
+ P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n");
+ goto error;
}
- if (v9ses->afid == ~0) {
- if (v9ses->extended)
- retval =
- v9fs_t_version(v9ses, v9ses->maxdata, "9P2000.u",
- &fcall);
- else
- retval = v9fs_t_version(v9ses, v9ses->maxdata, "9P2000",
- &fcall);
-
- if (retval < 0) {
- dprintk(DEBUG_ERROR, "v9fs_t_version failed\n");
- goto FreeFcall;
- }
-
- version = &fcall->params.rversion.version;
- if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) {
- dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n");
- v9ses->extended = 1;
- } else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) {
- dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n");
- v9ses->extended = 0;
- } else {
- retval = -EREMOTEIO;
- goto FreeFcall;
- }
+ return fid;
- n = fcall->params.rversion.msize;
- kfree(fcall);
-
- if (n < v9ses->maxdata)
- v9ses->maxdata = n;
- }
-
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "couldn't allocate FID\n");
- retval = -ENOMEM;
- goto SessCleanUp;
- }
- /* it is a little bit ugly, but we have to prevent newfid */
- /* being the same as afid, so if it is, get a new fid */
- if (v9ses->afid != ~0 && newfid == v9ses->afid) {
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "couldn't allocate FID\n");
- retval = -ENOMEM;
- goto SessCleanUp;
- }
- }
-
- if ((retval =
- v9fs_t_attach(v9ses, v9ses->name, v9ses->remotename, newfid,
- v9ses->afid, NULL))
- < 0) {
- dprintk(DEBUG_ERROR, "cannot attach\n");
- goto SessCleanUp;
- }
-
- if (v9ses->afid != ~0) {
- dprintk(DEBUG_ERROR, "afid not equal to ~0\n");
- if (v9fs_t_clunk(v9ses, v9ses->afid))
- dprintk(DEBUG_ERROR, "clunk failed\n");
- }
-
- return newfid;
-
- FreeFcall:
- kfree(fcall);
-
- SessCleanUp:
+error:
v9fs_session_close(v9ses);
- return retval;
+ return ERR_PTR(retval);
}
/**
void v9fs_session_close(struct v9fs_session_info *v9ses)
{
- if (v9ses->mux) {
- v9fs_mux_destroy(v9ses->mux);
- v9ses->mux = NULL;
- }
-
- if (v9ses->transport) {
- v9ses->transport->close(v9ses->transport);
- kfree(v9ses->transport);
- v9ses->transport = NULL;
+ if (v9ses->clnt) {
+ p9_client_destroy(v9ses->clnt);
+ v9ses->clnt = NULL;
}
__putname(v9ses->name);
* and cancel all pending requests.
*/
void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
- dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses);
- v9ses->transport->status = Disconnected;
- v9fs_mux_cancel(v9ses->mux, -EIO);
+ P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses);
+ p9_client_disconnect(v9ses->clnt);
}
extern int v9fs_error_init(void);
static int __init init_v9fs(void)
{
- int ret;
-
- v9fs_error_init();
-
printk(KERN_INFO "Installing v9fs 9p2000 file system support\n");
- ret = v9fs_mux_global_init();
- if (ret) {
- printk(KERN_WARNING "v9fs: starting mux failed\n");
- return ret;
- }
- ret = register_filesystem(&v9fs_fs_type);
- if (ret) {
- printk(KERN_WARNING "v9fs: registering file system failed\n");
- v9fs_mux_global_exit();
- }
-
- return ret;
+ return register_filesystem(&v9fs_fs_type);
}
/**
static void __exit exit_v9fs(void)
{
- v9fs_mux_global_exit();
unregister_filesystem(&v9fs_fs_type);
}
module_init(init_v9fs)
module_exit(exit_v9fs)
+MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
MODULE_LICENSE("GPL");
*
*/
-/*
- * Idpool structure provides lock and id management
- *
- */
-
-struct v9fs_idpool {
- struct semaphore lock;
- struct idr pool;
-};
-
/*
* Session structure provides information for an opened session
*
unsigned int uid; /* default uid/muid for legacy support */
unsigned int gid; /* default gid for legacy support */
- /* book keeping */
- struct v9fs_idpool fidpool; /* The FID pool for file descriptors */
-
- struct v9fs_transport *transport;
- struct v9fs_mux_data *mux;
-
- int inprogress; /* session in progress => true */
- int shutdown; /* session shutting down. no more attaches. */
- unsigned char session_hung;
+ struct p9_client *clnt; /* 9p client */
struct dentry *debugfs_dir;
};
PROTO_TCP,
PROTO_UNIX,
PROTO_FD,
+ PROTO_PCI,
};
/* possible values of ->cache */
extern struct dentry *v9fs_debugfs_root;
-int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
-struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
+struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
+ char *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
-int v9fs_get_idpool(struct v9fs_idpool *p);
-void v9fs_put_idpool(int id, struct v9fs_idpool *p);
-int v9fs_check_idpool(int id, struct v9fs_idpool *p);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
+static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
+{
+ return (inode->i_sb->s_fs_info);
+}
extern struct dentry_operations v9fs_cached_dentry_operations;
struct inode *v9fs_get_inode(struct super_block *sb, int mode);
-ino_t v9fs_qid2ino(struct v9fs_qid *qid);
-void v9fs_stat2inode(struct v9fs_stat *, struct inode *, struct super_block *);
+ino_t v9fs_qid2ino(struct p9_qid *qid);
+void v9fs_stat2inode(struct p9_stat *, struct inode *, struct super_block *);
int v9fs_dir_release(struct inode *inode, struct file *filp);
int v9fs_file_open(struct inode *inode, struct file *file);
-void v9fs_inode2stat(struct inode *inode, struct v9fs_stat *stat);
+void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat);
void v9fs_dentry_release(struct dentry *);
int v9fs_uflags2omode(int uflags);
#include <linux/pagemap.h>
#include <linux/idr.h>
#include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
static int v9fs_vfs_readpage(struct file *filp, struct page *page)
{
- char *buffer = NULL;
- int retval = -EIO;
- loff_t offset = page_offset(page);
- int count = PAGE_CACHE_SIZE;
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- int rsize = v9ses->maxdata - V9FS_IOHDRSZ;
- struct v9fs_fid *v9f = filp->private_data;
- struct v9fs_fcall *fcall = NULL;
- int fid = v9f->fid;
- int total = 0;
- int result = 0;
-
- dprintk(DEBUG_VFS, "\n");
+ int retval;
+ loff_t offset;
+ char *buffer;
+ struct p9_fid *fid;
+ P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ fid = filp->private_data;
buffer = kmap(page);
- do {
- if (count < rsize)
- rsize = count;
-
- result = v9fs_t_read(v9ses, fid, offset, rsize, &fcall);
-
- if (result < 0) {
- printk(KERN_ERR "v9fs_t_read returned %d\n",
- result);
-
- kfree(fcall);
- goto UnmapAndUnlock;
- } else
- offset += result;
-
- memcpy(buffer, fcall->params.rread.data, result);
-
- count -= result;
- buffer += result;
- total += result;
-
- kfree(fcall);
+ offset = page_offset(page);
- if (result < rsize)
- break;
- } while (count);
+ retval = p9_client_readn(fid, buffer, offset, PAGE_CACHE_SIZE);
+ if (retval < 0)
+ goto done;
- memset(buffer, 0, count);
+ memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval);
flush_dcache_page(page);
SetPageUptodate(page);
retval = 0;
-UnmapAndUnlock:
+done:
kunmap(page);
unlock_page(page);
return retval;
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
static int v9fs_dentry_delete(struct dentry *dentry)
{
- dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
return 1;
}
static int v9fs_cached_dentry_delete(struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
- dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
if(!inode)
return 1;
void v9fs_dentry_release(struct dentry *dentry)
{
- int err;
-
- dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
-
- if (dentry->d_fsdata != NULL) {
- struct list_head *fid_list = dentry->d_fsdata;
- struct v9fs_fid *temp = NULL;
- struct v9fs_fid *current_fid = NULL;
-
- list_for_each_entry_safe(current_fid, temp, fid_list, list) {
- err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid);
-
- if (err < 0)
- dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n",
- err, dentry->d_iname);
-
- v9fs_fid_destroy(current_fid);
+ struct v9fs_dentry *dent;
+ struct p9_fid *temp, *current_fid;
+
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ dent = dentry->d_fsdata;
+ if (dent) {
+ list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
+ dlist) {
+ p9_client_clunk(current_fid);
}
- kfree(dentry->d_fsdata); /* free the list_head */
+ kfree(dent);
+ dentry->d_fsdata = NULL;
}
}
#include <linux/sched.h>
#include <linux/inet.h>
#include <linux/idr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
-#include "conv.h"
#include "v9fs_vfs.h"
#include "fid.h"
*
*/
-static inline int dt_type(struct v9fs_stat *mistat)
+static inline int dt_type(struct p9_stat *mistat)
{
unsigned long perm = mistat->mode;
int rettype = DT_REG;
- if (perm & V9FS_DMDIR)
+ if (perm & P9_DMDIR)
rettype = DT_DIR;
- if (perm & V9FS_DMSYMLINK)
+ if (perm & P9_DMSYMLINK)
rettype = DT_LNK;
return rettype;
static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
- struct v9fs_fcall *fcall = NULL;
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *file = filp->private_data;
- unsigned int i, n, s;
- int fid = -1;
- int ret = 0;
- struct v9fs_stat stat;
- int over = 0;
-
- dprintk(DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
-
- fid = file->fid;
-
- if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) {
- kfree(file->rdir_fcall);
- file->rdir_fcall = NULL;
- }
-
- if (file->rdir_fcall) {
- n = file->rdir_fcall->params.rread.count;
- i = file->rdir_fpos;
- while (i < n) {
- s = v9fs_deserialize_stat(
- file->rdir_fcall->params.rread.data + i,
- n - i, &stat, v9ses->extended);
-
- if (s == 0) {
- dprintk(DEBUG_ERROR,
- "error while deserializing stat\n");
- ret = -EIO;
- goto FreeStructs;
- }
-
- over = filldir(dirent, stat.name.str, stat.name.len,
- filp->f_pos, v9fs_qid2ino(&stat.qid),
- dt_type(&stat));
-
- if (over) {
- file->rdir_fpos = i;
- file->rdir_pos = filp->f_pos;
- break;
- }
-
- i += s;
- filp->f_pos += s;
- }
-
- if (!over) {
- kfree(file->rdir_fcall);
- file->rdir_fcall = NULL;
- }
- }
-
- while (!over) {
- ret = v9fs_t_read(v9ses, fid, filp->f_pos,
- v9ses->maxdata-V9FS_IOHDRSZ, &fcall);
- if (ret < 0) {
- dprintk(DEBUG_ERROR, "error while reading: %d: %p\n",
- ret, fcall);
- goto FreeStructs;
- } else if (ret == 0)
+ int over;
+ struct p9_fid *fid;
+ struct v9fs_session_info *v9ses;
+ struct inode *inode;
+ struct p9_stat *st;
+
+ P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
+ inode = filp->f_path.dentry->d_inode;
+ v9ses = v9fs_inode2v9ses(inode);
+ fid = filp->private_data;
+ while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) {
+ if (IS_ERR(st))
+ return PTR_ERR(st);
+
+ over = filldir(dirent, st->name.str, st->name.len, filp->f_pos,
+ v9fs_qid2ino(&st->qid), dt_type(st));
+
+ if (over)
break;
- n = ret;
- i = 0;
- while (i < n) {
- s = v9fs_deserialize_stat(fcall->params.rread.data + i,
- n - i, &stat, v9ses->extended);
-
- if (s == 0) {
- dprintk(DEBUG_ERROR,
- "error while deserializing stat\n");
- return -EIO;
- }
-
- over = filldir(dirent, stat.name.str, stat.name.len,
- filp->f_pos, v9fs_qid2ino(&stat.qid),
- dt_type(&stat));
-
- if (over) {
- file->rdir_fcall = fcall;
- file->rdir_fpos = i;
- file->rdir_pos = filp->f_pos;
- fcall = NULL;
- break;
- }
-
- i += s;
- filp->f_pos += s;
- }
-
- kfree(fcall);
+ filp->f_pos += st->size;
+ kfree(st);
+ st = NULL;
}
- FreeStructs:
- kfree(fcall);
- return ret;
+ kfree(st);
+ return 0;
}
+
/**
* v9fs_dir_release - close a directory
* @inode: inode of the directory
int v9fs_dir_release(struct inode *inode, struct file *filp)
{
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *fid = filp->private_data;
- int fidnum = -1;
-
- dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp,
- fid->fid);
- fidnum = fid->fid;
+ struct p9_fid *fid;
+ fid = filp->private_data;
+ P9_DPRINTK(P9_DEBUG_VFS,
+ "inode: %p filp: %p fid: %d\n", inode, filp, fid->fid);
filemap_write_and_wait(inode->i_mapping);
-
- if (fidnum >= 0) {
- dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen,
- fid->fid);
-
- if (v9fs_t_clunk(v9ses, fidnum))
- dprintk(DEBUG_ERROR, "clunk failed\n");
-
- kfree(fid->rdir_fcall);
- kfree(fid);
-
- filp->private_data = NULL;
- }
-
+ p9_client_clunk(fid);
return 0;
}
#include <linux/list.h>
#include <asm/uaccess.h>
#include <linux/idr.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
int v9fs_file_open(struct inode *inode, struct file *file)
{
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *vfid;
- struct v9fs_fcall *fcall = NULL;
- int omode;
int err;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ int omode;
- dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file);
-
- vfid = v9fs_fid_clone(file->f_path.dentry);
- if (IS_ERR(vfid))
- return PTR_ERR(vfid);
-
+ P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
+ v9ses = v9fs_inode2v9ses(inode);
omode = v9fs_uflags2omode(file->f_flags);
- err = v9fs_t_open(v9ses, vfid->fid, omode, &fcall);
+ fid = file->private_data;
+ if (!fid) {
+ fid = v9fs_fid_clone(file->f_path.dentry);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
+
+ err = p9_client_open(fid, omode);
if (err < 0) {
- PRINT_FCALL_ERROR("open failed", fcall);
- goto Clunk_Fid;
+ p9_client_clunk(fid);
+ return err;
+ }
}
- file->private_data = vfid;
- vfid->fidopen = 1;
- vfid->fidclunked = 0;
- vfid->iounit = fcall->params.ropen.iounit;
- vfid->rdir_pos = 0;
- vfid->rdir_fcall = NULL;
- vfid->filp = file;
- kfree(fcall);
-
- if((vfid->qid.version) && (v9ses->cache)) {
- dprintk(DEBUG_VFS, "cached");
+ file->private_data = fid;
+ if ((fid->qid.version) && (v9ses->cache)) {
+ P9_DPRINTK(P9_DEBUG_VFS, "cached");
/* enable cached file options */
if(file->f_op == &v9fs_file_operations)
file->f_op = &v9fs_cached_file_operations;
}
return 0;
-
-Clunk_Fid:
- v9fs_fid_clunk(v9ses, vfid);
- kfree(fcall);
-
- return err;
}
/**
int res = 0;
struct inode *inode = filp->f_path.dentry->d_inode;
- dprintk(DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
+ P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
/* No mandatory locks */
if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
v9fs_file_read(struct file *filp, char __user * data, size_t count,
loff_t * offset)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *v9f = filp->private_data;
- struct v9fs_fcall *fcall = NULL;
- int fid = v9f->fid;
- int rsize = 0;
- int result = 0;
- int total = 0;
- int n;
-
- dprintk(DEBUG_VFS, "\n");
-
- rsize = v9ses->maxdata - V9FS_IOHDRSZ;
- if (v9f->iounit != 0 && rsize > v9f->iounit)
- rsize = v9f->iounit;
-
- do {
- if (count < rsize)
- rsize = count;
+ int ret;
+ struct p9_fid *fid;
- result = v9fs_t_read(v9ses, fid, *offset, rsize, &fcall);
+ P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ fid = filp->private_data;
+ ret = p9_client_uread(fid, data, *offset, count);
+ if (ret > 0)
+ *offset += ret;
- if (result < 0) {
- printk(KERN_ERR "9P2000: v9fs_t_read returned %d\n",
- result);
-
- kfree(fcall);
- return total;
- } else
- *offset += result;
-
- n = copy_to_user(data, fcall->params.rread.data, result);
- if (n) {
- dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n);
- kfree(fcall);
- return -EFAULT;
- }
-
- count -= result;
- data += result;
- total += result;
-
- kfree(fcall);
-
- if (result < rsize)
- break;
- } while (count);
-
- return total;
+ return ret;
}
/**
v9fs_file_write(struct file *filp, const char __user * data,
size_t count, loff_t * offset)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);
- struct v9fs_fid *v9fid = filp->private_data;
- struct v9fs_fcall *fcall;
- int fid = v9fid->fid;
- int result = -EIO;
- int rsize = 0;
- int total = 0;
-
- dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count,
- (int)*offset);
- rsize = v9ses->maxdata - V9FS_IOHDRSZ;
- if (v9fid->iounit != 0 && rsize > v9fid->iounit)
- rsize = v9fid->iounit;
-
- do {
- if (count < rsize)
- rsize = count;
+ int ret;
+ struct p9_fid *fid;
- result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall);
- if (result < 0) {
- PRINT_FCALL_ERROR("error while writing", fcall);
- kfree(fcall);
- return result;
- } else
- *offset += result;
-
- kfree(fcall);
- fcall = NULL;
-
- if (result != rsize) {
- eprintk(KERN_ERR,
- "short write: v9fs_t_write returned %d\n",
- result);
- break;
- }
+ P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
+ (int)count, (int)*offset);
- count -= result;
- data += result;
- total += result;
- } while (count);
+ fid = filp->private_data;
+ ret = p9_client_uwrite(fid, data, *offset, count);
+ if (ret > 0)
+ *offset += ret;
- invalidate_inode_pages2(inode->i_mapping);
- return total;
+ invalidate_inode_pages2(filp->f_path.dentry->d_inode->i_mapping);
+ return ret;
}
static const struct file_operations v9fs_cached_file_operations = {
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
int res;
res = mode & 0777;
if (S_ISDIR(mode))
- res |= V9FS_DMDIR;
+ res |= P9_DMDIR;
if (v9ses->extended) {
if (S_ISLNK(mode))
- res |= V9FS_DMSYMLINK;
+ res |= P9_DMSYMLINK;
if (v9ses->nodev == 0) {
if (S_ISSOCK(mode))
- res |= V9FS_DMSOCKET;
+ res |= P9_DMSOCKET;
if (S_ISFIFO(mode))
- res |= V9FS_DMNAMEDPIPE;
+ res |= P9_DMNAMEDPIPE;
if (S_ISBLK(mode))
- res |= V9FS_DMDEVICE;
+ res |= P9_DMDEVICE;
if (S_ISCHR(mode))
- res |= V9FS_DMDEVICE;
+ res |= P9_DMDEVICE;
}
if ((mode & S_ISUID) == S_ISUID)
- res |= V9FS_DMSETUID;
+ res |= P9_DMSETUID;
if ((mode & S_ISGID) == S_ISGID)
- res |= V9FS_DMSETGID;
- if ((mode & V9FS_DMLINK))
- res |= V9FS_DMLINK;
+ res |= P9_DMSETGID;
+ if ((mode & P9_DMLINK))
+ res |= P9_DMLINK;
}
return res;
res = mode & 0777;
- if ((mode & V9FS_DMDIR) == V9FS_DMDIR)
+ if ((mode & P9_DMDIR) == P9_DMDIR)
res |= S_IFDIR;
- else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended))
+ else if ((mode & P9_DMSYMLINK) && (v9ses->extended))
res |= S_IFLNK;
- else if ((mode & V9FS_DMSOCKET) && (v9ses->extended)
+ else if ((mode & P9_DMSOCKET) && (v9ses->extended)
&& (v9ses->nodev == 0))
res |= S_IFSOCK;
- else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended)
+ else if ((mode & P9_DMNAMEDPIPE) && (v9ses->extended)
&& (v9ses->nodev == 0))
res |= S_IFIFO;
- else if ((mode & V9FS_DMDEVICE) && (v9ses->extended)
+ else if ((mode & P9_DMDEVICE) && (v9ses->extended)
&& (v9ses->nodev == 0))
res |= S_IFBLK;
else
res |= S_IFREG;
if (v9ses->extended) {
- if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID)
+ if ((mode & P9_DMSETUID) == P9_DMSETUID)
res |= S_ISUID;
- if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID)
+ if ((mode & P9_DMSETGID) == P9_DMSETGID)
res |= S_ISGID;
}
switch (uflags&3) {
default:
case O_RDONLY:
- ret = V9FS_OREAD;
+ ret = P9_OREAD;
break;
case O_WRONLY:
- ret = V9FS_OWRITE;
+ ret = P9_OWRITE;
break;
case O_RDWR:
- ret = V9FS_ORDWR;
+ ret = P9_ORDWR;
break;
}
if (uflags & O_EXCL)
- ret |= V9FS_OEXCL;
+ ret |= P9_OEXCL;
if (uflags & O_TRUNC)
- ret |= V9FS_OTRUNC;
+ ret |= P9_OTRUNC;
if (uflags & O_APPEND)
- ret |= V9FS_OAPPEND;
+ ret |= P9_OAPPEND;
return ret;
}
*/
static void
-v9fs_blank_wstat(struct v9fs_wstat *wstat)
+v9fs_blank_wstat(struct p9_wstat *wstat)
{
wstat->type = ~0;
wstat->dev = ~0;
struct inode *inode;
struct v9fs_session_info *v9ses = sb->s_fs_info;
- dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
+ P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode);
inode = new_inode(sb);
if (inode) {
case S_IFCHR:
case S_IFSOCK:
if(!v9ses->extended) {
- dprintk(DEBUG_ERROR, "special files without extended mode\n");
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "special files without extended mode\n");
return ERR_PTR(-EINVAL);
}
init_special_inode(inode, inode->i_mode,
break;
case S_IFLNK:
if(!v9ses->extended) {
- dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n");
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "extended modes used w/o 9P2000.u\n");
return ERR_PTR(-EINVAL);
}
inode->i_op = &v9fs_symlink_inode_operations;
inode->i_fop = &v9fs_dir_operations;
break;
default:
- dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n",
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "BAD mode 0x%x S_IFMT 0x%x\n",
mode, mode & S_IFMT);
return ERR_PTR(-EINVAL);
}
} else {
- eprintk(KERN_WARNING, "Problem allocating inode\n");
+ P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n");
return ERR_PTR(-ENOMEM);
}
return inode;
}
-static int
-v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm,
- u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit)
-{
- int fid;
- int err;
- struct v9fs_fcall *fcall;
-
- fid = v9fs_get_idpool(&v9ses->fidpool);
- if (fid < 0) {
- eprintk(KERN_WARNING, "no free fids available\n");
- return -ENOSPC;
- }
-
- err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall);
- if (err < 0) {
- PRINT_FCALL_ERROR("clone error", fcall);
- if (fcall && fcall->id == RWALK)
- goto clunk_fid;
- else
- goto put_fid;
- }
- kfree(fcall);
-
- err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall);
- if (err < 0) {
- PRINT_FCALL_ERROR("create fails", fcall);
- goto clunk_fid;
- }
-
- if (iounit)
- *iounit = fcall->params.rcreate.iounit;
-
- if (qid)
- *qid = fcall->params.rcreate.qid;
-
- if (fidp)
- *fidp = fid;
-
- kfree(fcall);
- return 0;
-
-clunk_fid:
- v9fs_t_clunk(v9ses, fid);
- fid = V9FS_NOFID;
-
-put_fid:
- if (fid != V9FS_NOFID)
- v9fs_put_idpool(fid, &v9ses->fidpool);
-
- kfree(fcall);
- return err;
-}
-
+/*
static struct v9fs_fid*
v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
{
kfree(fcall);
return ERR_PTR(err);
}
+*/
static struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid,
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
struct super_block *sb)
{
int err, umode;
struct inode *ret;
- struct v9fs_fcall *fcall;
+ struct p9_stat *st;
ret = NULL;
- err = v9fs_t_stat(v9ses, fid, &fcall);
- if (err) {
- PRINT_FCALL_ERROR("stat error", fcall);
+ st = p9_client_stat(fid);
+ if (IS_ERR(st)) {
+ err = PTR_ERR(st);
+ st = NULL;
goto error;
}
- umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode);
+ umode = p9mode2unixmode(v9ses, st->mode);
ret = v9fs_get_inode(sb, umode);
if (IS_ERR(ret)) {
err = PTR_ERR(ret);
goto error;
}
- v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb);
- kfree(fcall);
+ v9fs_stat2inode(st, ret, sb);
+ ret->i_ino = v9fs_qid2ino(&st->qid);
+ kfree(st);
return ret;
error:
- kfree(fcall);
+ kfree(st);
if (ret)
iput(ret);
static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
{
- struct v9fs_fcall *fcall = NULL;
- struct super_block *sb = NULL;
- struct v9fs_session_info *v9ses = NULL;
- struct v9fs_fid *v9fid = NULL;
- struct inode *file_inode = NULL;
- int fid = -1;
- int result = 0;
+ struct inode *file_inode;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *v9fid;
- dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
+ P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file,
rmdir);
file_inode = file->d_inode;
- sb = file_inode->i_sb;
v9ses = v9fs_inode2v9ses(file_inode);
v9fid = v9fs_fid_clone(file);
if(IS_ERR(v9fid))
return PTR_ERR(v9fid);
- fid = v9fid->fid;
- if (fid < 0) {
- dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n",
- file_inode->i_ino);
- return -EBADF;
- }
-
- result = v9fs_t_remove(v9ses, fid, &fcall);
- if (result < 0) {
- PRINT_FCALL_ERROR("remove fails", fcall);
- goto Error;
- }
-
- v9fs_put_idpool(fid, &v9ses->fidpool);
- v9fs_fid_destroy(v9fid);
-
-Error:
- kfree(fcall);
- return result;
+ return p9_client_remove(v9fid);
}
static int
return 0;
}
+
/**
- * v9fs_vfs_create - VFS hook to create files
- * @inode: directory inode that is being deleted
- * @dentry: dentry that is being deleted
- * @mode: create permissions
- * @nd: path information
+ * v9fs_create - Create a file
+ * @dentry: dentry that is being created
+ * @perm: create permissions
+ * @mode: open mode
*
*/
-
-static int
-v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
- struct nameidata *nd)
+static struct p9_fid *
+v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
+ struct dentry *dentry, char *extension, u32 perm, u8 mode)
{
int err;
- u32 fid, perm, iounit;
- int flags;
- struct v9fs_session_info *v9ses;
- struct v9fs_fid *dfid, *vfid, *ffid;
+ char *name;
+ struct p9_fid *dfid, *ofid, *fid;
struct inode *inode;
- struct v9fs_qid qid;
- struct file *filp;
- inode = NULL;
- vfid = NULL;
- v9ses = v9fs_inode2v9ses(dir);
+ err = 0;
+ ofid = NULL;
+ fid = NULL;
+ name = (char *) dentry->d_name.name;
dfid = v9fs_fid_clone(dentry->d_parent);
if(IS_ERR(dfid)) {
err = PTR_ERR(dfid);
+ dfid = NULL;
goto error;
}
- perm = unixmode2p9mode(v9ses, mode);
- if (nd && nd->flags & LOOKUP_OPEN)
- flags = nd->intent.open.flags - 1;
- else
- flags = O_RDWR;
-
- err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit);
+ /* clone a fid to use for creation */
+ ofid = p9_client_walk(dfid, 0, NULL, 1);
+ if (IS_ERR(ofid)) {
+ err = PTR_ERR(ofid);
+ ofid = NULL;
+ goto error;
+ }
- if (err)
- goto clunk_dfid;
+ err = p9_client_fcreate(ofid, name, perm, mode, extension);
+ if (err < 0)
+ goto error;
- vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
- v9fs_fid_clunk(v9ses, dfid);
- if (IS_ERR(vfid)) {
- err = PTR_ERR(vfid);
- vfid = NULL;
+ /* now walk from the parent so we can get unopened fid */
+ fid = p9_client_walk(dfid, 1, &name, 0);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
goto error;
- }
+ } else
+ dfid = NULL;
- inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
+ /* instantiate inode and assign the unopened fid to the dentry */
+ inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
- inode = NULL;
goto error;
}
dentry->d_op = &v9fs_cached_dentry_operations;
else
dentry->d_op = &v9fs_dentry_operations;
+
d_instantiate(dentry, inode);
+ v9fs_fid_add(dentry, fid);
+ return ofid;
- if (nd && nd->flags & LOOKUP_OPEN) {
- ffid = v9fs_fid_create(v9ses, fid);
- if (!ffid)
- return -ENOMEM;
+error:
+ if (dfid)
+ p9_client_clunk(dfid);
+
+ if (ofid)
+ p9_client_clunk(ofid);
+
+ if (fid)
+ p9_client_clunk(fid);
+
+ return ERR_PTR(err);
+}
+
+/**
+ * v9fs_vfs_create - VFS hook to create files
+ * @inode: directory inode that is being created
+ * @dentry: dentry that is being deleted
+ * @mode: create permissions
+ * @nd: path information
+ *
+ */
+static int
+v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
+ struct nameidata *nd)
+{
+ int err;
+ u32 perm;
+ int flags;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct file *filp;
+
+ err = 0;
+ fid = NULL;
+ v9ses = v9fs_inode2v9ses(dir);
+ perm = unixmode2p9mode(v9ses, mode);
+ if (nd && nd->flags & LOOKUP_OPEN)
+ flags = nd->intent.open.flags - 1;
+ else
+ flags = O_RDWR;
+
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
+ v9fs_uflags2omode(flags));
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ /* if we are opening a file, assign the open fid to the file */
+ if (nd && nd->flags & LOOKUP_OPEN) {
filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created);
if (IS_ERR(filp)) {
- v9fs_fid_destroy(ffid);
- return PTR_ERR(filp);
+ err = PTR_ERR(filp);
+ goto error;
}
- ffid->rdir_pos = 0;
- ffid->rdir_fcall = NULL;
- ffid->fidopen = 1;
- ffid->iounit = iounit;
- ffid->filp = filp;
- filp->private_data = ffid;
- }
+ filp->private_data = fid;
+ } else
+ p9_client_clunk(fid);
return 0;
-clunk_dfid:
- v9fs_fid_clunk(v9ses, dfid);
-
error:
- if (vfid)
- v9fs_fid_destroy(vfid);
+ if (fid)
+ p9_client_clunk(fid);
return err;
}
static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
int err;
- u32 fid, perm;
+ u32 perm;
struct v9fs_session_info *v9ses;
- struct v9fs_fid *dfid, *vfid;
- struct inode *inode;
+ struct p9_fid *fid;
- inode = NULL;
- vfid = NULL;
+ P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);
+ err = 0;
v9ses = v9fs_inode2v9ses(dir);
- dfid = v9fs_fid_clone(dentry->d_parent);
- if(IS_ERR(dfid)) {
- err = PTR_ERR(dfid);
- goto error;
- }
-
perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
-
- err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, V9FS_OREAD, NULL, &fid, NULL, NULL);
-
- if (err) {
- dprintk(DEBUG_ERROR, "create error %d\n", err);
- goto clean_up_dfid;
+ fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
}
- vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
- if (IS_ERR(vfid)) {
- err = PTR_ERR(vfid);
- vfid = NULL;
- goto clean_up_dfid;
- }
+ if (fid)
+ p9_client_clunk(fid);
- v9fs_fid_clunk(v9ses, dfid);
- inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- inode = NULL;
- v9fs_fid_destroy(vfid);
- goto error;
- }
-
- if(v9ses->cache)
- dentry->d_op = &v9fs_cached_dentry_operations;
- else
- dentry->d_op = &v9fs_dentry_operations;
- d_instantiate(dentry, inode);
- return 0;
-
-clean_up_dfid:
- v9fs_fid_clunk(v9ses, dfid);
-
-error:
return err;
}
{
struct super_block *sb;
struct v9fs_session_info *v9ses;
- struct v9fs_fid *dirfid;
- struct v9fs_fid *fid;
+ struct p9_fid *dfid, *fid;
struct inode *inode;
- struct v9fs_fcall *fcall = NULL;
- int dirfidnum = -1;
- int newfid = -1;
+ char *name;
int result = 0;
- dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
+ P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
dir, dentry->d_name.name, dentry, nameidata);
sb = dir->i_sb;
v9ses = v9fs_inode2v9ses(dir);
- dirfid = v9fs_fid_lookup(dentry->d_parent);
-
- if(IS_ERR(dirfid))
- return ERR_PTR(PTR_ERR(dirfid));
-
- dirfidnum = dirfid->fid;
-
- newfid = v9fs_get_idpool(&v9ses->fidpool);
- if (newfid < 0) {
- eprintk(KERN_WARNING, "newfid fails!\n");
- result = -ENOSPC;
- goto Release_Dirfid;
- }
-
- result = v9fs_t_walk(v9ses, dirfidnum, newfid,
- (char *)dentry->d_name.name, &fcall);
-
- up(&dirfid->lock);
-
- if (result < 0) {
- if (fcall && fcall->id == RWALK)
- v9fs_t_clunk(v9ses, newfid);
- else
- v9fs_put_idpool(newfid, &v9ses->fidpool);
-
+ dfid = v9fs_fid_lookup(dentry->d_parent);
+ if (IS_ERR(dfid))
+ return ERR_PTR(PTR_ERR(dfid));
+
+ name = (char *) dentry->d_name.name;
+ fid = p9_client_walk(dfid, 1, &name, 1);
+ if (IS_ERR(fid)) {
+ result = PTR_ERR(fid);
if (result == -ENOENT) {
d_add(dentry, NULL);
- dprintk(DEBUG_VFS,
- "Return negative dentry %p count %d\n",
- dentry, atomic_read(&dentry->d_count));
- kfree(fcall);
return NULL;
}
- dprintk(DEBUG_ERROR, "walk error:%d\n", result);
- goto FreeFcall;
- }
- kfree(fcall);
-
- result = v9fs_t_stat(v9ses, newfid, &fcall);
- if (result < 0) {
- dprintk(DEBUG_ERROR, "stat error\n");
- goto FreeFcall;
- }
-
- inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses,
- fcall->params.rstat.stat.mode));
- if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) {
- eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n",
- PTR_ERR(inode));
-
- result = -ENOSPC;
- goto FreeFcall;
+ return ERR_PTR(result);
}
- inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid);
-
- fid = v9fs_fid_create(v9ses, newfid);
- if (fid == NULL) {
- dprintk(DEBUG_ERROR, "couldn't insert\n");
- result = -ENOMEM;
- goto FreeFcall;
+ inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);
+ if (IS_ERR(inode)) {
+ result = PTR_ERR(inode);
+ inode = NULL;
+ goto error;
}
- result = v9fs_fid_insert(fid, dentry);
+ result = v9fs_fid_add(dentry, fid);
if (result < 0)
- goto FreeFcall;
+ goto error;
- fid->qid = fcall->params.rstat.stat.qid;
- v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
if((fid->qid.version)&&(v9ses->cache))
dentry->d_op = &v9fs_cached_dentry_operations;
else
dentry->d_op = &v9fs_dentry_operations;
d_add(dentry, inode);
- kfree(fcall);
-
return NULL;
-Release_Dirfid:
- up(&dirfid->lock);
-
-FreeFcall:
- kfree(fcall);
+error:
+ if (fid)
+ p9_client_clunk(fid);
return ERR_PTR(result);
}
v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
- struct inode *old_inode = old_dentry->d_inode;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode);
- struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry);
- struct v9fs_fid *olddirfid;
- struct v9fs_fid *newdirfid;
- struct v9fs_wstat wstat;
- struct v9fs_fcall *fcall = NULL;
- int fid = -1;
- int olddirfidnum = -1;
- int newdirfidnum = -1;
- int retval = 0;
-
- dprintk(DEBUG_VFS, "\n");
+ struct inode *old_inode;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *oldfid;
+ struct p9_fid *olddirfid;
+ struct p9_fid *newdirfid;
+ struct p9_wstat wstat;
+ int retval;
+ P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ retval = 0;
+ old_inode = old_dentry->d_inode;
+ v9ses = v9fs_inode2v9ses(old_inode);
+ oldfid = v9fs_fid_lookup(old_dentry);
if(IS_ERR(oldfid))
return PTR_ERR(oldfid);
olddirfid = v9fs_fid_clone(old_dentry->d_parent);
if(IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
- goto Release_lock;
+ goto done;
}
newdirfid = v9fs_fid_clone(new_dentry->d_parent);
if(IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
- goto Clunk_olddir;
+ goto clunk_olddir;
}
/* 9P can only handle file rename in the same directory */
if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {
- dprintk(DEBUG_ERROR, "old dir and new dir are different\n");
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "old dir and new dir are different\n");
retval = -EXDEV;
- goto Clunk_newdir;
- }
-
- fid = oldfid->fid;
- olddirfidnum = olddirfid->fid;
- newdirfidnum = newdirfid->fid;
-
- if (fid < 0) {
- dprintk(DEBUG_ERROR, "no fid for old file #%lu\n",
- old_inode->i_ino);
- retval = -EBADF;
- goto Clunk_newdir;
+ goto clunk_newdir;
}
v9fs_blank_wstat(&wstat);
wstat.muid = v9ses->name;
wstat.name = (char *) new_dentry->d_name.name;
+ retval = p9_client_wstat(oldfid, &wstat);
- retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall);
+clunk_newdir:
+ p9_client_clunk(olddirfid);
- if (retval < 0)
- PRINT_FCALL_ERROR("wstat error", fcall);
-
- kfree(fcall);
-
-Clunk_newdir:
- v9fs_fid_clunk(v9ses, newdirfid);
-
-Clunk_olddir:
- v9fs_fid_clunk(v9ses, olddirfid);
-
-Release_lock:
- up(&oldfid->lock);
+clunk_olddir:
+ p9_client_clunk(newdirfid);
+done:
return retval;
}
v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_clone(dentry);
- int err = -EPERM;
-
- dprintk(DEBUG_VFS, "dentry: %p\n", dentry);
- if(IS_ERR(fid))
+ int err;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_stat *st;
+
+ P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
+ err = -EPERM;
+ v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ fid = v9fs_fid_lookup(dentry);
+ if (IS_ERR(fid))
return PTR_ERR(fid);
- err = v9fs_t_stat(v9ses, fid->fid, &fcall);
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
- if (err < 0)
- dprintk(DEBUG_ERROR, "stat error\n");
- else {
- v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode,
- dentry->d_inode->i_sb);
+ v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb);
generic_fillattr(dentry->d_inode, stat);
- }
- kfree(fcall);
- v9fs_fid_clunk(v9ses, fid);
- return err;
+ kfree(st);
+ return 0;
}
/**
static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
{
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_clone(dentry);
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_wstat wstat;
- int res = -EPERM;
+ int retval;
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_wstat wstat;
- dprintk(DEBUG_VFS, "\n");
+ P9_DPRINTK(P9_DEBUG_VFS, "\n");
+ retval = -EPERM;
+ v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ fid = v9fs_fid_lookup(dentry);
if(IS_ERR(fid))
return PTR_ERR(fid);
wstat.n_gid = iattr->ia_gid;
}
- res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall);
+ retval = p9_client_wstat(fid, &wstat);
+ if (retval >= 0)
+ retval = inode_setattr(dentry->d_inode, iattr);
- if (res < 0)
- PRINT_FCALL_ERROR("wstat error", fcall);
-
- kfree(fcall);
- if (res >= 0)
- res = inode_setattr(dentry->d_inode, iattr);
-
- v9fs_fid_clunk(v9ses, fid);
- return res;
+ return retval;
}
/**
*/
void
-v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode,
+v9fs_stat2inode(struct p9_stat *stat, struct inode *inode,
struct super_block *sb)
{
int n;
case 'b':
break;
default:
- dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n",
- type, stat->extension.len, stat->extension.str);
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "Unknown special type %c (%.*s)\n", type,
+ stat->extension.len, stat->extension.str);
};
inode->i_rdev = MKDEV(major, minor);
} else
inode->i_size = stat->length;
- inode->i_blocks =
- (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+ /* not real number of blocks, but 512 byte ones ... */
+ inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
}
/**
* BUG: potential for inode number collisions?
*/
-ino_t v9fs_qid2ino(struct v9fs_qid *qid)
+ino_t v9fs_qid2ino(struct p9_qid *qid)
{
u64 path = qid->path + 2;
ino_t i = 0;
static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
{
- int retval = -EPERM;
+ int retval;
- struct v9fs_fcall *fcall = NULL;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
- struct v9fs_fid *fid = v9fs_fid_clone(dentry);
+ struct v9fs_session_info *v9ses;
+ struct p9_fid *fid;
+ struct p9_stat *st;
+ P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name);
+ retval = -EPERM;
+ v9ses = v9fs_inode2v9ses(dentry->d_inode);
+ fid = v9fs_fid_lookup(dentry);
if(IS_ERR(fid))
return PTR_ERR(fid);
- if (!v9ses->extended) {
- retval = -EBADF;
- dprintk(DEBUG_ERROR, "not extended\n");
- goto ClunkFid;
- }
-
- dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name);
- retval = v9fs_t_stat(v9ses, fid->fid, &fcall);
-
- if (retval < 0) {
- dprintk(DEBUG_ERROR, "stat error\n");
- goto FreeFcall;
- }
+ if (!v9ses->extended)
+ return -EBADF;
- if (!fcall) {
- retval = -EIO;
- goto ClunkFid;
- }
+ st = p9_client_stat(fid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
- if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) {
+ if (!(st->mode & P9_DMSYMLINK)) {
retval = -EINVAL;
- goto FreeFcall;
+ goto done;
}
/* copy extension buffer into buffer */
- if (fcall->params.rstat.stat.extension.len < buflen)
- buflen = fcall->params.rstat.stat.extension.len + 1;
+ if (st->extension.len < buflen)
+ buflen = st->extension.len + 1;
- memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1);
+ memmove(buffer, st->extension.str, buflen - 1);
buffer[buflen-1] = 0;
- dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len,
- fcall->params.rstat.stat.extension.str, buffer);
- retval = buflen;
+ P9_DPRINTK(P9_DEBUG_VFS,
+ "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len,
+ st->extension.str, buffer);
-FreeFcall:
- kfree(fcall);
-
-ClunkFid:
- v9fs_fid_clunk(v9ses, fid);
+ retval = buflen;
+done:
+ kfree(st);
return retval;
}
if (buflen > PATH_MAX)
buflen = PATH_MAX;
- dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+ P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
retval = v9fs_readlink(dentry, link, buflen);
if (retval > 0) {
if ((ret = copy_to_user(buffer, link, retval)) != 0) {
- dprintk(DEBUG_ERROR, "problem copying to user: %d\n",
- ret);
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "problem copying to user: %d\n", ret);
retval = ret;
}
}
int len = 0;
char *link = __getname();
- dprintk(DEBUG_VFS, "%s n", dentry->d_name.name);
+ P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name);
if (!link)
link = ERR_PTR(-ENOMEM);
{
char *s = nd_get_link(nd);
- dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
+ P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s);
if (!IS_ERR(s))
__putname(s);
}
static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
int mode, const char *extension)
{
- int err;
- u32 fid, perm;
+ u32 perm;
struct v9fs_session_info *v9ses;
- struct v9fs_fid *dfid, *vfid = NULL;
- struct inode *inode = NULL;
+ struct p9_fid *fid;
v9ses = v9fs_inode2v9ses(dir);
if (!v9ses->extended) {
- dprintk(DEBUG_ERROR, "not extended\n");
+ P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
return -EPERM;
}
- dfid = v9fs_fid_clone(dentry->d_parent);
- if(IS_ERR(dfid)) {
- err = PTR_ERR(dfid);
- goto error;
- }
-
perm = unixmode2p9mode(v9ses, mode);
+ fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm,
+ P9_OREAD);
+ if (IS_ERR(fid))
+ return PTR_ERR(fid);
- err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name,
- perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL);
-
- if (err)
- goto clunk_dfid;
-
- err = v9fs_t_clunk(v9ses, fid);
- if (err)
- goto clunk_dfid;
-
- vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry);
- if (IS_ERR(vfid)) {
- err = PTR_ERR(vfid);
- vfid = NULL;
- goto clunk_dfid;
- }
-
- inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- inode = NULL;
- goto free_vfid;
- }
-
- if(v9ses->cache)
- dentry->d_op = &v9fs_cached_dentry_operations;
- else
- dentry->d_op = &v9fs_dentry_operations;
- d_instantiate(dentry, inode);
+ p9_client_clunk(fid);
return 0;
-
-free_vfid:
- v9fs_fid_destroy(vfid);
-
-clunk_dfid:
- v9fs_fid_clunk(v9ses, dfid);
-
-error:
- return err;
-
}
/**
static int
v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
{
- dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
- symname);
+ P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino,
+ dentry->d_name.name, symname);
return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname);
}
struct dentry *dentry)
{
int retval;
- struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
- struct v9fs_fid *oldfid;
+ struct p9_fid *oldfid;
char *name;
- dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
+ P9_DPRINTK(P9_DEBUG_VFS,
+ " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
old_dentry->d_name.name);
oldfid = v9fs_fid_clone(old_dentry);
}
sprintf(name, "%d\n", oldfid->fid);
- retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name);
+ retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name);
__putname(name);
clunk_fid:
- v9fs_fid_clunk(v9ses, oldfid);
+ p9_client_clunk(oldfid);
return retval;
}
int retval;
char *name;
- dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
+ P9_DPRINTK(P9_DEBUG_VFS,
+ " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
if (!new_valid_dev(rdev))
#include <linux/mount.h>
#include <linux/idr.h>
#include <linux/sched.h>
+#include <net/9p/9p.h>
+#include <net/9p/client.h>
-#include "debug.h"
#include "v9fs.h"
-#include "9p.h"
#include "v9fs_vfs.h"
#include "fid.h"
struct vfsmount *mnt)
{
struct super_block *sb = NULL;
- struct v9fs_fcall *fcall = NULL;
struct inode *inode = NULL;
struct dentry *root = NULL;
struct v9fs_session_info *v9ses = NULL;
- struct v9fs_fid *root_fid = NULL;
+ struct p9_stat *st = NULL;
int mode = S_IRWXUGO | S_ISVTX;
uid_t uid = current->fsuid;
gid_t gid = current->fsgid;
- int stat_result = 0;
- int newfid = 0;
+ struct p9_fid *fid;
int retval = 0;
- dprintk(DEBUG_VFS, " \n");
+ P9_DPRINTK(P9_DEBUG_VFS, " \n");
v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL);
if (!v9ses)
return -ENOMEM;
- if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) {
- dprintk(DEBUG_ERROR, "problem initiating session\n");
- retval = newfid;
- goto out_free_session;
+ fid = v9fs_session_init(v9ses, dev_name, data);
+ if (IS_ERR(fid)) {
+ retval = PTR_ERR(fid);
+ fid = NULL;
+ kfree(v9ses);
+ v9ses = NULL;
+ goto error;
+ }
+
+ st = p9_client_stat(fid);
+ if (IS_ERR(st)) {
+ retval = PTR_ERR(st);
+ goto error;
}
sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
if (IS_ERR(sb)) {
retval = PTR_ERR(sb);
- goto out_close_session;
+ goto error;
}
v9fs_fill_super(sb, v9ses, flags);
inode = v9fs_get_inode(sb, S_IFDIR | mode);
if (IS_ERR(inode)) {
retval = PTR_ERR(inode);
- goto put_back_sb;
+ goto error;
}
inode->i_uid = uid;
root = d_alloc_root(inode);
if (!root) {
retval = -ENOMEM;
- goto put_back_sb;
+ goto error;
}
sb->s_root = root;
+ root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+ v9fs_stat2inode(st, root->d_inode, sb);
+ v9fs_fid_add(root, fid);
- stat_result = v9fs_t_stat(v9ses, newfid, &fcall);
- if (stat_result < 0) {
- dprintk(DEBUG_ERROR, "stat error\n");
- v9fs_t_clunk(v9ses, newfid);
- } else {
- /* Setup the Root Inode */
- root_fid = v9fs_fid_create(v9ses, newfid);
- if (root_fid == NULL) {
- retval = -ENOMEM;
- goto put_back_sb;
- }
-
- retval = v9fs_fid_insert(root_fid, root);
- if (retval < 0) {
- kfree(fcall);
- goto put_back_sb;
- }
-
- root_fid->qid = fcall->params.rstat.stat.qid;
- root->d_inode->i_ino =
- v9fs_qid2ino(&fcall->params.rstat.stat.qid);
- v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb);
- }
+ return simple_set_mnt(mnt, sb);
- kfree(fcall);
+error:
+ if (fid)
+ p9_client_clunk(fid);
- if (stat_result < 0) {
- retval = stat_result;
- goto put_back_sb;
+ if (v9ses) {
+ v9fs_session_close(v9ses);
+ kfree(v9ses);
}
- return simple_set_mnt(mnt, sb);
-
-out_close_session:
- v9fs_session_close(v9ses);
-out_free_session:
- kfree(v9ses);
- return retval;
+ if (sb) {
+ up_write(&sb->s_umount);
+ deactivate_super(sb);
+ }
-put_back_sb:
- /* deactivate_super calls v9fs_kill_super which will frees the rest */
- up_write(&sb->s_umount);
- deactivate_super(sb);
return retval;
}
{
struct v9fs_session_info *v9ses = s->s_fs_info;
- dprintk(DEBUG_VFS, " %p\n", s);
+ P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s);
v9fs_dentry_release(s->s_root); /* clunk root */
v9fs_session_close(v9ses);
kfree(v9ses);
- dprintk(DEBUG_VFS, "exiting kill_super\n");
+ P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n");
}
/**
config 9P_FS
tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
- depends on INET && EXPERIMENTAL
+ depends on INET && NET_9P && EXPERIMENTAL
help
If you say Y here, you will get experimental support for
Plan 9 resource sharing via the 9P2000 protocol.
--- /dev/null
+/*
+ * include/net/9p/9p.h
+ *
+ * 9P protocol definitions.
+ *
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#ifndef NET_9P_H
+#define NET_9P_H
+
+#ifdef CONFIG_NET_9P_DEBUG
+
+#define P9_DEBUG_ERROR (1<<0)
+#define P9_DEBUG_9P (1<<2)
+#define P9_DEBUG_VFS (1<<3)
+#define P9_DEBUG_CONV (1<<4)
+#define P9_DEBUG_MUX (1<<5)
+#define P9_DEBUG_TRANS (1<<6)
+#define P9_DEBUG_SLABS (1<<7)
+#define P9_DEBUG_FCALL (1<<8)
+
+extern unsigned int p9_debug_level;
+
+#define P9_DPRINTK(level, format, arg...) \
+do { \
+ if ((p9_debug_level & level) == level) \
+ printk(KERN_NOTICE "-- %s (%d): " \
+ format , __FUNCTION__, current->pid , ## arg); \
+} while (0)
+
+#define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR, \
+ "%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \
+ fcall?fcall->params.rerror.error.str:"");
+
+#else
+#define P9_DPRINTK(level, format, arg...) do { } while (0)
+#define PRINT_FCALL_ERROR(s, fcall) do { } while (0)
+#endif
+
+#define P9_EPRINTK(level, format, arg...) \
+do { \
+ printk(level "9p: %s (%d): " \
+ format , __FUNCTION__, current->pid , ## arg); \
+} while (0)
+
+
+/* Message Types */
+enum {
+ P9_TVERSION = 100,
+ P9_RVERSION,
+ P9_TAUTH = 102,
+ P9_RAUTH,
+ P9_TATTACH = 104,
+ P9_RATTACH,
+ P9_TERROR = 106,
+ P9_RERROR,
+ P9_TFLUSH = 108,
+ P9_RFLUSH,
+ P9_TWALK = 110,
+ P9_RWALK,
+ P9_TOPEN = 112,
+ P9_ROPEN,
+ P9_TCREATE = 114,
+ P9_RCREATE,
+ P9_TREAD = 116,
+ P9_RREAD,
+ P9_TWRITE = 118,
+ P9_RWRITE,
+ P9_TCLUNK = 120,
+ P9_RCLUNK,
+ P9_TREMOVE = 122,
+ P9_RREMOVE,
+ P9_TSTAT = 124,
+ P9_RSTAT,
+ P9_TWSTAT = 126,
+ P9_RWSTAT,
+};
+
+/* open modes */
+enum {
+ P9_OREAD = 0x00,
+ P9_OWRITE = 0x01,
+ P9_ORDWR = 0x02,
+ P9_OEXEC = 0x03,
+ P9_OEXCL = 0x04,
+ P9_OTRUNC = 0x10,
+ P9_OREXEC = 0x20,
+ P9_ORCLOSE = 0x40,
+ P9_OAPPEND = 0x80,
+};
+
+/* permissions */
+enum {
+ P9_DMDIR = 0x80000000,
+ P9_DMAPPEND = 0x40000000,
+ P9_DMEXCL = 0x20000000,
+ P9_DMMOUNT = 0x10000000,
+ P9_DMAUTH = 0x08000000,
+ P9_DMTMP = 0x04000000,
+ P9_DMSYMLINK = 0x02000000,
+ P9_DMLINK = 0x01000000,
+ /* 9P2000.u extensions */
+ P9_DMDEVICE = 0x00800000,
+ P9_DMNAMEDPIPE = 0x00200000,
+ P9_DMSOCKET = 0x00100000,
+ P9_DMSETUID = 0x00080000,
+ P9_DMSETGID = 0x00040000,
+};
+
+/* qid.types */
+enum {
+ P9_QTDIR = 0x80,
+ P9_QTAPPEND = 0x40,
+ P9_QTEXCL = 0x20,
+ P9_QTMOUNT = 0x10,
+ P9_QTAUTH = 0x08,
+ P9_QTTMP = 0x04,
+ P9_QTSYMLINK = 0x02,
+ P9_QTLINK = 0x01,
+ P9_QTFILE = 0x00,
+};
+
+#define P9_NOTAG (u16)(~0)
+#define P9_NOFID (u32)(~0)
+#define P9_MAXWELEM 16
+
+/* ample room for Twrite/Rread header */
+#define P9_IOHDRSZ 24
+
+struct p9_str {
+ u16 len;
+ char *str;
+};
+
+/* qids are the unique ID for a file (like an inode */
+struct p9_qid {
+ u8 type;
+ u32 version;
+ u64 path;
+};
+
+/* Plan 9 file metadata (stat) structure */
+struct p9_stat {
+ u16 size;
+ u16 type;
+ u32 dev;
+ struct p9_qid qid;
+ u32 mode;
+ u32 atime;
+ u32 mtime;
+ u64 length;
+ struct p9_str name;
+ struct p9_str uid;
+ struct p9_str gid;
+ struct p9_str muid;
+ struct p9_str extension; /* 9p2000.u extensions */
+ u32 n_uid; /* 9p2000.u extensions */
+ u32 n_gid; /* 9p2000.u extensions */
+ u32 n_muid; /* 9p2000.u extensions */
+};
+
+/* file metadata (stat) structure used to create Twstat message
+ The is similar to p9_stat, but the strings don't point to
+ the same memory block and should be freed separately
+*/
+struct p9_wstat {
+ u16 size;
+ u16 type;
+ u32 dev;
+ struct p9_qid qid;
+ u32 mode;
+ u32 atime;
+ u32 mtime;
+ u64 length;
+ char *name;
+ char *uid;
+ char *gid;
+ char *muid;
+ char *extension; /* 9p2000.u extensions */
+ u32 n_uid; /* 9p2000.u extensions */
+ u32 n_gid; /* 9p2000.u extensions */
+ u32 n_muid; /* 9p2000.u extensions */
+};
+
+/* Structures for Protocol Operations */
+struct p9_tversion {
+ u32 msize;
+ struct p9_str version;
+};
+
+struct p9_rversion {
+ u32 msize;
+ struct p9_str version;
+};
+
+struct p9_tauth {
+ u32 afid;
+ struct p9_str uname;
+ struct p9_str aname;
+};
+
+struct p9_rauth {
+ struct p9_qid qid;
+};
+
+struct p9_rerror {
+ struct p9_str error;
+ u32 errno; /* 9p2000.u extension */
+};
+
+struct p9_tflush {
+ u16 oldtag;
+};
+
+struct p9_rflush {
+};
+
+struct p9_tattach {
+ u32 fid;
+ u32 afid;
+ struct p9_str uname;
+ struct p9_str aname;
+};
+
+struct p9_rattach {
+ struct p9_qid qid;
+};
+
+struct p9_twalk {
+ u32 fid;
+ u32 newfid;
+ u16 nwname;
+ struct p9_str wnames[16];
+};
+
+struct p9_rwalk {
+ u16 nwqid;
+ struct p9_qid wqids[16];
+};
+
+struct p9_topen {
+ u32 fid;
+ u8 mode;
+};
+
+struct p9_ropen {
+ struct p9_qid qid;
+ u32 iounit;
+};
+
+struct p9_tcreate {
+ u32 fid;
+ struct p9_str name;
+ u32 perm;
+ u8 mode;
+ struct p9_str extension;
+};
+
+struct p9_rcreate {
+ struct p9_qid qid;
+ u32 iounit;
+};
+
+struct p9_tread {
+ u32 fid;
+ u64 offset;
+ u32 count;
+};
+
+struct p9_rread {
+ u32 count;
+ u8 *data;
+};
+
+struct p9_twrite {
+ u32 fid;
+ u64 offset;
+ u32 count;
+ u8 *data;
+};
+
+struct p9_rwrite {
+ u32 count;
+};
+
+struct p9_tclunk {
+ u32 fid;
+};
+
+struct p9_rclunk {
+};
+
+struct p9_tremove {
+ u32 fid;
+};
+
+struct p9_rremove {
+};
+
+struct p9_tstat {
+ u32 fid;
+};
+
+struct p9_rstat {
+ struct p9_stat stat;
+};
+
+struct p9_twstat {
+ u32 fid;
+ struct p9_stat stat;
+};
+
+struct p9_rwstat {
+};
+
+/*
+ * fcall is the primary packet structure
+ *
+ */
+
+struct p9_fcall {
+ u32 size;
+ u8 id;
+ u16 tag;
+ void *sdata;
+
+ union {
+ struct p9_tversion tversion;
+ struct p9_rversion rversion;
+ struct p9_tauth tauth;
+ struct p9_rauth rauth;
+ struct p9_rerror rerror;
+ struct p9_tflush tflush;
+ struct p9_rflush rflush;
+ struct p9_tattach tattach;
+ struct p9_rattach rattach;
+ struct p9_twalk twalk;
+ struct p9_rwalk rwalk;
+ struct p9_topen topen;
+ struct p9_ropen ropen;
+ struct p9_tcreate tcreate;
+ struct p9_rcreate rcreate;
+ struct p9_tread tread;
+ struct p9_rread rread;
+ struct p9_twrite twrite;
+ struct p9_rwrite rwrite;
+ struct p9_tclunk tclunk;
+ struct p9_rclunk rclunk;
+ struct p9_tremove tremove;
+ struct p9_rremove rremove;
+ struct p9_tstat tstat;
+ struct p9_rstat rstat;
+ struct p9_twstat twstat;
+ struct p9_rwstat rwstat;
+ } params;
+};
+
+struct p9_idpool;
+
+int p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
+ int dotu);
+int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu);
+void p9_set_tag(struct p9_fcall *fc, u16 tag);
+struct p9_fcall *p9_create_tversion(u32 msize, char *version);
+struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname,
+ char *aname);
+struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname);
+struct p9_fcall *p9_create_tflush(u16 oldtag);
+struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
+ char **wnames);
+struct p9_fcall *p9_create_topen(u32 fid, u8 mode);
+struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
+ char *extension, int dotu);
+struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count);
+struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
+ const char *data);
+struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
+ const char __user *data);
+struct p9_fcall *p9_create_tclunk(u32 fid);
+struct p9_fcall *p9_create_tremove(u32 fid);
+struct p9_fcall *p9_create_tstat(u32 fid);
+struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
+ int dotu);
+
+int p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int dotu);
+int p9_errstr2errno(char *errstr, int len);
+
+struct p9_idpool *p9_idpool_create(void);
+void p9_idpool_destroy(struct p9_idpool *);
+int p9_idpool_get(struct p9_idpool *p);
+void p9_idpool_put(int id, struct p9_idpool *p);
+int p9_idpool_check(int id, struct p9_idpool *p);
+
+int p9_error_init(void);
+int p9_errstr2errno(char *, int);
+int __init p9_sysctl_register(void);
+void __exit p9_sysctl_unregister(void);
+#endif /* NET_9P_H */
--- /dev/null
+/*
+ * include/net/9p/client.h
+ *
+ * 9P Client Definitions
+ *
+ * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#ifndef NET_9P_CLIENT_H
+#define NET_9P_CLIENT_H
+
+struct p9_client {
+ spinlock_t lock; /* protect client structure */
+ int msize;
+ unsigned char dotu;
+ struct p9_transport *trans;
+ struct p9_conn *conn;
+
+ struct p9_idpool *fidpool;
+ struct list_head fidlist;
+};
+
+struct p9_fid {
+ struct p9_client *clnt;
+ u32 fid;
+ int mode;
+ struct p9_qid qid;
+ u32 iounit;
+ uid_t uid;
+ void *aux;
+
+ int rdir_fpos;
+ int rdir_pos;
+ struct p9_fcall *rdir_fcall;
+ struct list_head flist;
+ struct list_head dlist; /* list of all fids attached to a dentry */
+};
+
+struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
+ int dotu);
+void p9_client_destroy(struct p9_client *clnt);
+void p9_client_disconnect(struct p9_client *clnt);
+struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
+ char *uname, char *aname);
+struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname);
+struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
+ int clone);
+int p9_client_open(struct p9_fid *fid, int mode);
+int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
+ char *extension);
+int p9_client_clunk(struct p9_fid *fid);
+int p9_client_remove(struct p9_fid *fid);
+int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count);
+int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count);
+int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count);
+int p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset,
+ u32 count);
+int p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
+ u32 count);
+struct p9_stat *p9_client_stat(struct p9_fid *fid);
+int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);
+struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset);
+
+#endif /* NET_9P_CLIENT_H */
--- /dev/null
+/*
+ * include/net/9p/conn.h
+ *
+ * Connection Definitions
+ *
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#ifndef NET_9P_CONN_H
+#define NET_9P_CONN_H
+
+#undef P9_NONBLOCK
+
+struct p9_conn;
+struct p9_req;
+
+/**
+ * p9_mux_req_callback - callback function that is called when the
+ * response of a request is received. The callback is called from
+ * a workqueue and shouldn't block.
+ *
+ * @req - request
+ * @a - the pointer that was specified when the request was send to be
+ * passed to the callback
+ */
+typedef void (*p9_conn_req_callback)(struct p9_req *req, void *a);
+
+struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
+ unsigned char *dotu);
+void p9_conn_destroy(struct p9_conn *);
+int p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc, struct p9_fcall **rc);
+
+#ifdef P9_NONBLOCK
+int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc,
+ p9_conn_req_callback cb, void *a);
+#endif /* P9_NONBLOCK */
+
+void p9_conn_cancel(struct p9_conn *m, int err);
+
+#endif /* NET_9P_CONN_H */
--- /dev/null
+/*
+ * include/net/9p/transport.h
+ *
+ * Transport Definition
+ *
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#ifndef NET_9P_TRANSPORT_H
+#define NET_9P_TRANSPORT_H
+
+enum p9_transport_status {
+ Connected,
+ Disconnected,
+ Hung,
+};
+
+struct p9_transport {
+ enum p9_transport_status status;
+ void *priv;
+
+ int (*write) (struct p9_transport *, void *, int);
+ int (*read) (struct p9_transport *, void *, int);
+ void (*close) (struct p9_transport *);
+ unsigned int (*poll)(struct p9_transport *, struct poll_table_struct *);
+};
+
+struct p9_transport *p9_trans_create_tcp(const char *addr, int port);
+struct p9_transport *p9_trans_create_unix(const char *addr);
+struct p9_transport *p9_trans_create_fd(int rfd, int wfd);
+
+#endif /* NET_9P_TRANSPORT_H */
--- /dev/null
+#
+# 9P protocol configuration
+#
+
+menuconfig NET_9P
+ depends on NET && EXPERIMENTAL
+ tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)"
+ help
+ If you say Y here, you will get experimental support for
+ Plan 9 resource sharing via the 9P2000 protocol.
+
+ See <http://v9fs.sf.net> for more information.
+
+ If unsure, say N.
+
+config NET_9P_DEBUG
+ bool "Debug information"
+ depends on NET_9P
+ help
+ Say Y if you want the 9P subsistem to log debug information.
+
--- /dev/null
+obj-$(CONFIG_NET_9P) := 9p.o
+
+9p-objs := \
+ mod.o \
+ trans_fd.o \
+ mux.o \
+ client.o \
+ conv.o \
+ error.o \
+ fcprint.o \
+ util.o \
+
+9p-$(CONFIG_SYSCTL) += sysctl.o
--- /dev/null
+/*
+ * net/9p/clnt.c
+ *
+ * 9P Client
+ *
+ * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+#include <net/9p/conn.h>
+#include <net/9p/client.h>
+
+static struct p9_fid *p9_fid_create(struct p9_client *clnt);
+static void p9_fid_destroy(struct p9_fid *fid);
+static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu);
+
+struct p9_client *p9_client_create(struct p9_transport *trans, int msize,
+ int dotu)
+{
+ int err, n;
+ struct p9_client *clnt;
+ struct p9_fcall *tc, *rc;
+ struct p9_str *version;
+
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
+ if (!clnt)
+ return ERR_PTR(-ENOMEM);
+
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n",
+ clnt, trans, msize, dotu);
+ spin_lock_init(&clnt->lock);
+ clnt->trans = trans;
+ clnt->msize = msize;
+ clnt->dotu = dotu;
+ INIT_LIST_HEAD(&clnt->fidlist);
+ clnt->fidpool = p9_idpool_create();
+ if (!clnt->fidpool) {
+ err = PTR_ERR(clnt->fidpool);
+ clnt->fidpool = NULL;
+ goto error;
+ }
+
+ clnt->conn = p9_conn_create(clnt->trans, clnt->msize, &clnt->dotu);
+ if (IS_ERR(clnt->conn)) {
+ err = PTR_ERR(clnt->conn);
+ clnt->conn = NULL;
+ goto error;
+ }
+
+ tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000");
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ version = &rc->params.rversion.version;
+ if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8))
+ clnt->dotu = 1;
+ else if (version->len == 6 && !memcmp(version->str, "9P2000", 6))
+ clnt->dotu = 0;
+ else {
+ err = -EREMOTEIO;
+ goto error;
+ }
+
+ n = rc->params.rversion.msize;
+ if (n < clnt->msize)
+ clnt->msize = n;
+
+ kfree(tc);
+ kfree(rc);
+ return clnt;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ p9_client_destroy(clnt);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_create);
+
+void p9_client_destroy(struct p9_client *clnt)
+{
+ struct p9_fid *fid, *fidptr;
+
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
+ if (clnt->conn) {
+ p9_conn_destroy(clnt->conn);
+ clnt->conn = NULL;
+ }
+
+ if (clnt->trans) {
+ clnt->trans->close(clnt->trans);
+ kfree(clnt->trans);
+ clnt->trans = NULL;
+ }
+
+ if (clnt->fidpool)
+ p9_idpool_destroy(clnt->fidpool);
+
+ list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist)
+ p9_fid_destroy(fid);
+
+ kfree(clnt);
+}
+EXPORT_SYMBOL(p9_client_destroy);
+
+void p9_client_disconnect(struct p9_client *clnt)
+{
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
+ clnt->trans->status = Disconnected;
+ p9_conn_cancel(clnt->conn, -EIO);
+}
+EXPORT_SYMBOL(p9_client_disconnect);
+
+struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
+ char *uname, char *aname)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p afid %d uname %s aname %s\n",
+ clnt, afid?afid->fid:-1, uname, aname);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+
+ fid = p9_fid_create(clnt);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ memmove(&fid->qid, &rc->params.rattach.qid, sizeof(struct p9_qid));
+ kfree(tc);
+ kfree(rc);
+ return fid;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ if (fid)
+ p9_fid_destroy(fid);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_attach);
+
+struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p uname %s aname %s\n", clnt, uname,
+ aname);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+
+ fid = p9_fid_create(clnt);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ tc = p9_create_tauth(fid->fid, uname, aname);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ memmove(&fid->qid, &rc->params.rauth.qid, sizeof(struct p9_qid));
+ kfree(tc);
+ kfree(rc);
+ return fid;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ if (fid)
+ p9_fid_destroy(fid);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_auth);
+
+struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
+ int clone)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d nwname %d wname[0] %s\n",
+ oldfid->fid, nwname, wnames?wnames[0]:NULL);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = oldfid->clnt;
+ if (clone) {
+ fid = p9_fid_create(clnt);
+ if (IS_ERR(fid)) {
+ err = PTR_ERR(fid);
+ fid = NULL;
+ goto error;
+ }
+
+ fid->uid = oldfid->uid;
+ } else
+ fid = oldfid;
+
+ tc = p9_create_twalk(oldfid->fid, fid->fid, nwname, wnames);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err) {
+ if (rc && rc->id == P9_RWALK)
+ goto clunk_fid;
+ else
+ goto error;
+ }
+
+ if (rc->params.rwalk.nwqid != nwname) {
+ err = -ENOENT;
+ goto clunk_fid;
+ }
+
+ if (nwname)
+ memmove(&fid->qid,
+ &rc->params.rwalk.wqids[rc->params.rwalk.nwqid - 1],
+ sizeof(struct p9_qid));
+ else
+ fid->qid = oldfid->qid;
+
+ kfree(tc);
+ kfree(rc);
+ return fid;
+
+clunk_fid:
+ kfree(tc);
+ kfree(rc);
+ rc = NULL;
+ tc = p9_create_tclunk(fid->fid);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ p9_conn_rpc(clnt->conn, tc, &rc);
+
+error:
+ kfree(tc);
+ kfree(rc);
+ if (fid && (fid != oldfid))
+ p9_fid_destroy(fid);
+
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_walk);
+
+int p9_client_open(struct p9_fid *fid, int mode)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d mode %d\n", fid->fid, mode);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+
+ if (fid->mode != -1)
+ return -EINVAL;
+
+ tc = p9_create_topen(fid->fid, mode);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto done;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto done;
+
+ fid->mode = mode;
+ fid->iounit = rc->params.ropen.iounit;
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_open);
+
+int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
+ char *extension)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d name %s perm %d mode %d\n", fid->fid,
+ name, perm, mode);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+
+ if (fid->mode != -1)
+ return -EINVAL;
+
+ tc = p9_create_tcreate(fid->fid, name, perm, mode, extension,
+ clnt->dotu);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto done;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto done;
+
+ fid->mode = mode;
+ fid->iounit = rc->params.ropen.iounit;
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_fcreate);
+
+int p9_client_clunk(struct p9_fid *fid)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+
+ tc = p9_create_tclunk(fid->fid);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto done;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto done;
+
+ p9_fid_destroy(fid);
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_clunk);
+
+int p9_client_remove(struct p9_fid *fid)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+
+ tc = p9_create_tremove(fid->fid);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto done;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto done;
+
+ p9_fid_destroy(fid);
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_remove);
+
+int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count)
+{
+ int err, n, rsize, total;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu %d\n", fid->fid,
+ (long long unsigned) offset, count);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+ total = 0;
+
+ rsize = fid->iounit;
+ if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+ rsize = clnt->msize - P9_IOHDRSZ;
+
+ do {
+ if (count < rsize)
+ rsize = count;
+
+ tc = p9_create_tread(fid->fid, offset, rsize);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ n = rc->params.rread.count;
+ if (n > count)
+ n = count;
+
+ memmove(data, rc->params.rread.data, n);
+ count -= n;
+ data += n;
+ offset += n;
+ total += n;
+ kfree(tc);
+ tc = NULL;
+ kfree(rc);
+ rc = NULL;
+ } while (count > 0 && n == rsize);
+
+ return total;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_read);
+
+int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count)
+{
+ int err, n, rsize, total;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+ (long long unsigned) offset, count);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+ total = 0;
+
+ rsize = fid->iounit;
+ if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+ rsize = clnt->msize - P9_IOHDRSZ;
+
+ do {
+ if (count < rsize)
+ rsize = count;
+
+ tc = p9_create_twrite(fid->fid, offset, rsize, data);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ n = rc->params.rread.count;
+ count -= n;
+ data += n;
+ offset += n;
+ total += n;
+ kfree(tc);
+ tc = NULL;
+ kfree(rc);
+ rc = NULL;
+ } while (count > 0);
+
+ return total;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_write);
+
+int
+p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count)
+{
+ int err, n, rsize, total;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+ (long long unsigned) offset, count);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+ total = 0;
+
+ rsize = fid->iounit;
+ if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+ rsize = clnt->msize - P9_IOHDRSZ;
+
+ do {
+ if (count < rsize)
+ rsize = count;
+
+ tc = p9_create_tread(fid->fid, offset, rsize);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ n = rc->params.rread.count;
+ if (n > count)
+ n = count;
+
+ err = copy_to_user(data, rc->params.rread.data, n);
+ if (err) {
+ err = -EFAULT;
+ goto error;
+ }
+
+ count -= n;
+ data += n;
+ offset += n;
+ total += n;
+ kfree(tc);
+ tc = NULL;
+ kfree(rc);
+ rc = NULL;
+ } while (count > 0 && n == rsize);
+
+ return total;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_uread);
+
+int
+p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset,
+ u32 count)
+{
+ int err, n, rsize, total;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+ (long long unsigned) offset, count);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+ total = 0;
+
+ rsize = fid->iounit;
+ if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+ rsize = clnt->msize - P9_IOHDRSZ;
+
+ do {
+ if (count < rsize)
+ rsize = count;
+
+ tc = p9_create_twrite_u(fid->fid, offset, rsize, data);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ n = rc->params.rread.count;
+ count -= n;
+ data += n;
+ offset += n;
+ total += n;
+ kfree(tc);
+ tc = NULL;
+ kfree(rc);
+ rc = NULL;
+ } while (count > 0);
+
+ return total;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_uwrite);
+
+int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count)
+{
+ int n, total;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+ (long long unsigned) offset, count);
+ n = 0;
+ total = 0;
+ while (count) {
+ n = p9_client_read(fid, data, offset, count);
+ if (n <= 0)
+ break;
+
+ data += n;
+ offset += n;
+ count -= n;
+ total += n;
+ }
+
+ if (n < 0)
+ total = n;
+
+ return total;
+}
+EXPORT_SYMBOL(p9_client_readn);
+
+struct p9_stat *p9_client_stat(struct p9_fid *fid)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+ struct p9_stat *ret;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ ret = NULL;
+ clnt = fid->clnt;
+
+ tc = p9_create_tstat(fid->fid);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ ret = p9_clone_stat(&rc->params.rstat.stat, clnt->dotu);
+ if (IS_ERR(ret)) {
+ err = PTR_ERR(ret);
+ ret = NULL;
+ goto error;
+ }
+
+ kfree(tc);
+ kfree(rc);
+ return ret;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ kfree(ret);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_stat);
+
+int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst)
+{
+ int err;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ clnt = fid->clnt;
+
+ tc = p9_create_twstat(fid->fid, wst, clnt->dotu);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto done;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return err;
+}
+EXPORT_SYMBOL(p9_client_wstat);
+
+struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset)
+{
+ int err, n, m;
+ struct p9_fcall *tc, *rc;
+ struct p9_client *clnt;
+ struct p9_stat st, *ret;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu\n", fid->fid,
+ (long long unsigned) offset);
+ err = 0;
+ tc = NULL;
+ rc = NULL;
+ ret = NULL;
+ clnt = fid->clnt;
+
+ /* if the offset is below or above the current response, free it */
+ if (offset < fid->rdir_fpos || (fid->rdir_fcall &&
+ offset >= fid->rdir_fpos+fid->rdir_fcall->params.rread.count)) {
+ fid->rdir_pos = 0;
+ if (fid->rdir_fcall)
+ fid->rdir_fpos += fid->rdir_fcall->params.rread.count;
+
+ kfree(fid->rdir_fcall);
+ fid->rdir_fcall = NULL;
+ if (offset < fid->rdir_fpos)
+ fid->rdir_fpos = 0;
+ }
+
+ if (!fid->rdir_fcall) {
+ n = fid->iounit;
+ if (!n || n > clnt->msize-P9_IOHDRSZ)
+ n = clnt->msize - P9_IOHDRSZ;
+
+ while (1) {
+ if (fid->rdir_fcall) {
+ fid->rdir_fpos +=
+ fid->rdir_fcall->params.rread.count;
+ kfree(fid->rdir_fcall);
+ fid->rdir_fcall = NULL;
+ }
+
+ tc = p9_create_tread(fid->fid, fid->rdir_fpos, n);
+ if (IS_ERR(tc)) {
+ err = PTR_ERR(tc);
+ tc = NULL;
+ goto error;
+ }
+
+ err = p9_conn_rpc(clnt->conn, tc, &rc);
+ if (err)
+ goto error;
+
+ n = rc->params.rread.count;
+ if (n == 0)
+ goto done;
+
+ fid->rdir_fcall = rc;
+ rc = NULL;
+ if (offset >= fid->rdir_fpos &&
+ offset < fid->rdir_fpos+n)
+ break;
+ }
+
+ fid->rdir_pos = 0;
+ }
+
+ m = offset - fid->rdir_fpos;
+ if (m < 0)
+ goto done;
+
+ n = p9_deserialize_stat(fid->rdir_fcall->params.rread.data + m,
+ fid->rdir_fcall->params.rread.count - m, &st, clnt->dotu);
+
+ if (!n) {
+ err = -EIO;
+ goto error;
+ }
+
+ fid->rdir_pos += n;
+ st.size = n;
+ ret = p9_clone_stat(&st, clnt->dotu);
+ if (IS_ERR(ret)) {
+ err = PTR_ERR(ret);
+ ret = NULL;
+ goto error;
+ }
+
+done:
+ kfree(tc);
+ kfree(rc);
+ return ret;
+
+error:
+ kfree(tc);
+ kfree(rc);
+ kfree(ret);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_client_dirread);
+
+static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu)
+{
+ int n;
+ char *p;
+ struct p9_stat *ret;
+
+ n = sizeof(struct p9_stat) + st->name.len + st->uid.len + st->gid.len +
+ st->muid.len;
+
+ if (dotu)
+ n += st->extension.len;
+
+ ret = kmalloc(n, GFP_KERNEL);
+ if (!ret)
+ return ERR_PTR(-ENOMEM);
+
+ memmove(ret, st, sizeof(struct p9_stat));
+ p = ((char *) ret) + sizeof(struct p9_stat);
+ memmove(p, st->name.str, st->name.len);
+ p += st->name.len;
+ memmove(p, st->uid.str, st->uid.len);
+ p += st->uid.len;
+ memmove(p, st->gid.str, st->gid.len);
+ p += st->gid.len;
+ memmove(p, st->muid.str, st->muid.len);
+ p += st->muid.len;
+
+ if (dotu) {
+ memmove(p, st->extension.str, st->extension.len);
+ p += st->extension.len;
+ }
+
+ return ret;
+}
+
+static struct p9_fid *p9_fid_create(struct p9_client *clnt)
+{
+ int err;
+ struct p9_fid *fid;
+
+ P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt);
+ fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL);
+ if (!fid)
+ return ERR_PTR(-ENOMEM);
+
+ fid->fid = p9_idpool_get(clnt->fidpool);
+ if (fid->fid < 0) {
+ err = -ENOSPC;
+ goto error;
+ }
+
+ memset(&fid->qid, 0, sizeof(struct p9_qid));
+ fid->mode = -1;
+ fid->rdir_fpos = 0;
+ fid->rdir_pos = 0;
+ fid->rdir_fcall = NULL;
+ fid->uid = current->fsuid;
+ fid->clnt = clnt;
+ fid->aux = NULL;
+
+ spin_lock(&clnt->lock);
+ list_add(&fid->flist, &clnt->fidlist);
+ spin_unlock(&clnt->lock);
+
+ return fid;
+
+error:
+ kfree(fid);
+ return ERR_PTR(err);
+}
+
+static void p9_fid_destroy(struct p9_fid *fid)
+{
+ struct p9_client *clnt;
+
+ P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid);
+ clnt = fid->clnt;
+ p9_idpool_put(fid->fid, clnt->fidpool);
+ spin_lock(&clnt->lock);
+ list_del(&fid->flist);
+ spin_unlock(&clnt->lock);
+ kfree(fid->rdir_fcall);
+ kfree(fid);
+}
--- /dev/null
+/*
+ * net/9p/conv.c
+ *
+ * 9P protocol conversion functions
+ *
+ * Copyright (C) 2004, 2005 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/idr.h>
+#include <linux/uaccess.h>
+#include <net/9p/9p.h>
+
+/*
+ * Buffer to help with string parsing
+ */
+struct cbuf {
+ unsigned char *sp;
+ unsigned char *p;
+ unsigned char *ep;
+};
+
+static inline void buf_init(struct cbuf *buf, void *data, int datalen)
+{
+ buf->sp = buf->p = data;
+ buf->ep = data + datalen;
+}
+
+static inline int buf_check_overflow(struct cbuf *buf)
+{
+ return buf->p > buf->ep;
+}
+
+static int buf_check_size(struct cbuf *buf, int len)
+{
+ if (buf->p + len > buf->ep) {
+ if (buf->p < buf->ep) {
+ P9_EPRINTK(KERN_ERR,
+ "buffer overflow: want %d has %d\n", len,
+ (int)(buf->ep - buf->p));
+ dump_stack();
+ buf->p = buf->ep + 1;
+ }
+
+ return 0;
+ }
+
+ return 1;
+}
+
+static void *buf_alloc(struct cbuf *buf, int len)
+{
+ void *ret = NULL;
+
+ if (buf_check_size(buf, len)) {
+ ret = buf->p;
+ buf->p += len;
+ }
+
+ return ret;
+}
+
+static void buf_put_int8(struct cbuf *buf, u8 val)
+{
+ if (buf_check_size(buf, 1)) {
+ buf->p[0] = val;
+ buf->p++;
+ }
+}
+
+static void buf_put_int16(struct cbuf *buf, u16 val)
+{
+ if (buf_check_size(buf, 2)) {
+ *(__le16 *) buf->p = cpu_to_le16(val);
+ buf->p += 2;
+ }
+}
+
+static void buf_put_int32(struct cbuf *buf, u32 val)
+{
+ if (buf_check_size(buf, 4)) {
+ *(__le32 *)buf->p = cpu_to_le32(val);
+ buf->p += 4;
+ }
+}
+
+static void buf_put_int64(struct cbuf *buf, u64 val)
+{
+ if (buf_check_size(buf, 8)) {
+ *(__le64 *)buf->p = cpu_to_le64(val);
+ buf->p += 8;
+ }
+}
+
+static char *buf_put_stringn(struct cbuf *buf, const char *s, u16 slen)
+{
+ char *ret;
+
+ ret = NULL;
+ if (buf_check_size(buf, slen + 2)) {
+ buf_put_int16(buf, slen);
+ ret = buf->p;
+ memcpy(buf->p, s, slen);
+ buf->p += slen;
+ }
+
+ return ret;
+}
+
+static inline void buf_put_string(struct cbuf *buf, const char *s)
+{
+ buf_put_stringn(buf, s, strlen(s));
+}
+
+static u8 buf_get_int8(struct cbuf *buf)
+{
+ u8 ret = 0;
+
+ if (buf_check_size(buf, 1)) {
+ ret = buf->p[0];
+ buf->p++;
+ }
+
+ return ret;
+}
+
+static u16 buf_get_int16(struct cbuf *buf)
+{
+ u16 ret = 0;
+
+ if (buf_check_size(buf, 2)) {
+ ret = le16_to_cpu(*(__le16 *)buf->p);
+ buf->p += 2;
+ }
+
+ return ret;
+}
+
+static u32 buf_get_int32(struct cbuf *buf)
+{
+ u32 ret = 0;
+
+ if (buf_check_size(buf, 4)) {
+ ret = le32_to_cpu(*(__le32 *)buf->p);
+ buf->p += 4;
+ }
+
+ return ret;
+}
+
+static u64 buf_get_int64(struct cbuf *buf)
+{
+ u64 ret = 0;
+
+ if (buf_check_size(buf, 8)) {
+ ret = le64_to_cpu(*(__le64 *)buf->p);
+ buf->p += 8;
+ }
+
+ return ret;
+}
+
+static void buf_get_str(struct cbuf *buf, struct p9_str *vstr)
+{
+ vstr->len = buf_get_int16(buf);
+ if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) {
+ vstr->str = buf->p;
+ buf->p += vstr->len;
+ } else {
+ vstr->len = 0;
+ vstr->str = NULL;
+ }
+}
+
+static void buf_get_qid(struct cbuf *bufp, struct p9_qid *qid)
+{
+ qid->type = buf_get_int8(bufp);
+ qid->version = buf_get_int32(bufp);
+ qid->path = buf_get_int64(bufp);
+}
+
+/**
+ * p9_size_wstat - calculate the size of a variable length stat struct
+ * @stat: metadata (stat) structure
+ * @dotu: non-zero if 9P2000.u
+ *
+ */
+
+static int p9_size_wstat(struct p9_wstat *wstat, int dotu)
+{
+ int size = 0;
+
+ if (wstat == NULL) {
+ P9_EPRINTK(KERN_ERR, "p9_size_stat: got a NULL stat pointer\n");
+ return 0;
+ }
+
+ size = /* 2 + *//* size[2] */
+ 2 + /* type[2] */
+ 4 + /* dev[4] */
+ 1 + /* qid.type[1] */
+ 4 + /* qid.vers[4] */
+ 8 + /* qid.path[8] */
+ 4 + /* mode[4] */
+ 4 + /* atime[4] */
+ 4 + /* mtime[4] */
+ 8 + /* length[8] */
+ 8; /* minimum sum of string lengths */
+
+ if (wstat->name)
+ size += strlen(wstat->name);
+ if (wstat->uid)
+ size += strlen(wstat->uid);
+ if (wstat->gid)
+ size += strlen(wstat->gid);
+ if (wstat->muid)
+ size += strlen(wstat->muid);
+
+ if (dotu) {
+ size += 4 + /* n_uid[4] */
+ 4 + /* n_gid[4] */
+ 4 + /* n_muid[4] */
+ 2; /* string length of extension[4] */
+ if (wstat->extension)
+ size += strlen(wstat->extension);
+ }
+
+ return size;
+}
+
+/**
+ * buf_get_stat - safely decode a recieved metadata (stat) structure
+ * @bufp: buffer to deserialize
+ * @stat: metadata (stat) structure
+ * @dotu: non-zero if 9P2000.u
+ *
+ */
+
+static void
+buf_get_stat(struct cbuf *bufp, struct p9_stat *stat, int dotu)
+{
+ stat->size = buf_get_int16(bufp);
+ stat->type = buf_get_int16(bufp);
+ stat->dev = buf_get_int32(bufp);
+ stat->qid.type = buf_get_int8(bufp);
+ stat->qid.version = buf_get_int32(bufp);
+ stat->qid.path = buf_get_int64(bufp);
+ stat->mode = buf_get_int32(bufp);
+ stat->atime = buf_get_int32(bufp);
+ stat->mtime = buf_get_int32(bufp);
+ stat->length = buf_get_int64(bufp);
+ buf_get_str(bufp, &stat->name);
+ buf_get_str(bufp, &stat->uid);
+ buf_get_str(bufp, &stat->gid);
+ buf_get_str(bufp, &stat->muid);
+
+ if (dotu) {
+ buf_get_str(bufp, &stat->extension);
+ stat->n_uid = buf_get_int32(bufp);
+ stat->n_gid = buf_get_int32(bufp);
+ stat->n_muid = buf_get_int32(bufp);
+ }
+}
+
+/**
+ * p9_deserialize_stat - decode a received metadata structure
+ * @buf: buffer to deserialize
+ * @buflen: length of received buffer
+ * @stat: metadata structure to decode into
+ * @dotu: non-zero if 9P2000.u
+ *
+ * Note: stat will point to the buf region.
+ */
+
+int
+p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat,
+ int dotu)
+{
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+ unsigned char *p;
+
+ buf_init(bufp, buf, buflen);
+ p = bufp->p;
+ buf_get_stat(bufp, stat, dotu);
+
+ if (buf_check_overflow(bufp))
+ return 0;
+ else
+ return bufp->p - p;
+}
+EXPORT_SYMBOL(p9_deserialize_stat);
+
+/**
+ * deserialize_fcall - unmarshal a response
+ * @buf: recieved buffer
+ * @buflen: length of received buffer
+ * @rcall: fcall structure to populate
+ * @rcalllen: length of fcall structure to populate
+ * @dotu: non-zero if 9P2000.u
+ *
+ */
+
+int
+p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *rcall,
+ int dotu)
+{
+
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+ int i = 0;
+
+ buf_init(bufp, buf, buflen);
+
+ rcall->size = buf_get_int32(bufp);
+ rcall->id = buf_get_int8(bufp);
+ rcall->tag = buf_get_int16(bufp);
+
+ P9_DPRINTK(P9_DEBUG_CONV, "size %d id %d tag %d\n", rcall->size,
+ rcall->id, rcall->tag);
+
+ switch (rcall->id) {
+ default:
+ P9_EPRINTK(KERN_ERR, "unknown message type: %d\n", rcall->id);
+ return -EPROTO;
+ case P9_RVERSION:
+ rcall->params.rversion.msize = buf_get_int32(bufp);
+ buf_get_str(bufp, &rcall->params.rversion.version);
+ break;
+ case P9_RFLUSH:
+ break;
+ case P9_RATTACH:
+ rcall->params.rattach.qid.type = buf_get_int8(bufp);
+ rcall->params.rattach.qid.version = buf_get_int32(bufp);
+ rcall->params.rattach.qid.path = buf_get_int64(bufp);
+ break;
+ case P9_RWALK:
+ rcall->params.rwalk.nwqid = buf_get_int16(bufp);
+ if (rcall->params.rwalk.nwqid > P9_MAXWELEM) {
+ P9_EPRINTK(KERN_ERR,
+ "Rwalk with more than %d qids: %d\n",
+ P9_MAXWELEM, rcall->params.rwalk.nwqid);
+ return -EPROTO;
+ }
+
+ for (i = 0; i < rcall->params.rwalk.nwqid; i++)
+ buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]);
+ break;
+ case P9_ROPEN:
+ buf_get_qid(bufp, &rcall->params.ropen.qid);
+ rcall->params.ropen.iounit = buf_get_int32(bufp);
+ break;
+ case P9_RCREATE:
+ buf_get_qid(bufp, &rcall->params.rcreate.qid);
+ rcall->params.rcreate.iounit = buf_get_int32(bufp);
+ break;
+ case P9_RREAD:
+ rcall->params.rread.count = buf_get_int32(bufp);
+ rcall->params.rread.data = bufp->p;
+ buf_check_size(bufp, rcall->params.rread.count);
+ break;
+ case P9_RWRITE:
+ rcall->params.rwrite.count = buf_get_int32(bufp);
+ break;
+ case P9_RCLUNK:
+ break;
+ case P9_RREMOVE:
+ break;
+ case P9_RSTAT:
+ buf_get_int16(bufp);
+ buf_get_stat(bufp, &rcall->params.rstat.stat, dotu);
+ break;
+ case P9_RWSTAT:
+ break;
+ case P9_RERROR:
+ buf_get_str(bufp, &rcall->params.rerror.error);
+ if (dotu)
+ rcall->params.rerror.errno = buf_get_int16(bufp);
+ break;
+ }
+
+ if (buf_check_overflow(bufp)) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "buffer overflow\n");
+ return -EIO;
+ }
+
+ return bufp->p - bufp->sp;
+}
+EXPORT_SYMBOL(p9_deserialize_fcall);
+
+static inline void p9_put_int8(struct cbuf *bufp, u8 val, u8 * p)
+{
+ *p = val;
+ buf_put_int8(bufp, val);
+}
+
+static inline void p9_put_int16(struct cbuf *bufp, u16 val, u16 * p)
+{
+ *p = val;
+ buf_put_int16(bufp, val);
+}
+
+static inline void p9_put_int32(struct cbuf *bufp, u32 val, u32 * p)
+{
+ *p = val;
+ buf_put_int32(bufp, val);
+}
+
+static inline void p9_put_int64(struct cbuf *bufp, u64 val, u64 * p)
+{
+ *p = val;
+ buf_put_int64(bufp, val);
+}
+
+static void
+p9_put_str(struct cbuf *bufp, char *data, struct p9_str *str)
+{
+ int len;
+ char *s;
+
+ if (data)
+ len = strlen(data);
+ else
+ len = 0;
+
+ s = buf_put_stringn(bufp, data, len);
+ if (str) {
+ str->len = len;
+ str->str = s;
+ }
+}
+
+static int
+p9_put_data(struct cbuf *bufp, const char *data, int count,
+ unsigned char **pdata)
+{
+ *pdata = buf_alloc(bufp, count);
+ memmove(*pdata, data, count);
+ return count;
+}
+
+static int
+p9_put_user_data(struct cbuf *bufp, const char __user *data, int count,
+ unsigned char **pdata)
+{
+ *pdata = buf_alloc(bufp, count);
+ return copy_from_user(*pdata, data, count);
+}
+
+static void
+p9_put_wstat(struct cbuf *bufp, struct p9_wstat *wstat,
+ struct p9_stat *stat, int statsz, int dotu)
+{
+ p9_put_int16(bufp, statsz, &stat->size);
+ p9_put_int16(bufp, wstat->type, &stat->type);
+ p9_put_int32(bufp, wstat->dev, &stat->dev);
+ p9_put_int8(bufp, wstat->qid.type, &stat->qid.type);
+ p9_put_int32(bufp, wstat->qid.version, &stat->qid.version);
+ p9_put_int64(bufp, wstat->qid.path, &stat->qid.path);
+ p9_put_int32(bufp, wstat->mode, &stat->mode);
+ p9_put_int32(bufp, wstat->atime, &stat->atime);
+ p9_put_int32(bufp, wstat->mtime, &stat->mtime);
+ p9_put_int64(bufp, wstat->length, &stat->length);
+
+ p9_put_str(bufp, wstat->name, &stat->name);
+ p9_put_str(bufp, wstat->uid, &stat->uid);
+ p9_put_str(bufp, wstat->gid, &stat->gid);
+ p9_put_str(bufp, wstat->muid, &stat->muid);
+
+ if (dotu) {
+ p9_put_str(bufp, wstat->extension, &stat->extension);
+ p9_put_int32(bufp, wstat->n_uid, &stat->n_uid);
+ p9_put_int32(bufp, wstat->n_gid, &stat->n_gid);
+ p9_put_int32(bufp, wstat->n_muid, &stat->n_muid);
+ }
+}
+
+static struct p9_fcall *
+p9_create_common(struct cbuf *bufp, u32 size, u8 id)
+{
+ struct p9_fcall *fc;
+
+ size += 4 + 1 + 2; /* size[4] id[1] tag[2] */
+ fc = kmalloc(sizeof(struct p9_fcall) + size, GFP_KERNEL);
+ if (!fc)
+ return ERR_PTR(-ENOMEM);
+
+ fc->sdata = (char *)fc + sizeof(*fc);
+
+ buf_init(bufp, (char *)fc->sdata, size);
+ p9_put_int32(bufp, size, &fc->size);
+ p9_put_int8(bufp, id, &fc->id);
+ p9_put_int16(bufp, P9_NOTAG, &fc->tag);
+
+ return fc;
+}
+
+void p9_set_tag(struct p9_fcall *fc, u16 tag)
+{
+ fc->tag = tag;
+ *(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag);
+}
+EXPORT_SYMBOL(p9_set_tag);
+
+struct p9_fcall *p9_create_tversion(u32 msize, char *version)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 2 + strlen(version); /* msize[4] version[s] */
+ fc = p9_create_common(bufp, size, P9_TVERSION);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, msize, &fc->params.tversion.msize);
+ p9_put_str(bufp, version, &fc->params.tversion.version);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tversion);
+
+struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ /* afid[4] uname[s] aname[s] */
+ size = 4 + 2 + strlen(uname) + 2 + strlen(aname);
+ fc = p9_create_common(bufp, size, P9_TAUTH);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, afid, &fc->params.tauth.afid);
+ p9_put_str(bufp, uname, &fc->params.tauth.uname);
+ p9_put_str(bufp, aname, &fc->params.tauth.aname);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tauth);
+
+struct p9_fcall *
+p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ /* fid[4] afid[4] uname[s] aname[s] */
+ size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname);
+ fc = p9_create_common(bufp, size, P9_TATTACH);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tattach.fid);
+ p9_put_int32(bufp, afid, &fc->params.tattach.afid);
+ p9_put_str(bufp, uname, &fc->params.tattach.uname);
+ p9_put_str(bufp, aname, &fc->params.tattach.aname);
+
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tattach);
+
+struct p9_fcall *p9_create_tflush(u16 oldtag)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 2; /* oldtag[2] */
+ fc = p9_create_common(bufp, size, P9_TFLUSH);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int16(bufp, oldtag, &fc->params.tflush.oldtag);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tflush);
+
+struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname,
+ char **wnames)
+{
+ int i, size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ if (nwname > P9_MAXWELEM) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "nwname > %d\n", P9_MAXWELEM);
+ return NULL;
+ }
+
+ size = 4 + 4 + 2; /* fid[4] newfid[4] nwname[2] ... */
+ for (i = 0; i < nwname; i++) {
+ size += 2 + strlen(wnames[i]); /* wname[s] */
+ }
+
+ fc = p9_create_common(bufp, size, P9_TWALK);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.twalk.fid);
+ p9_put_int32(bufp, newfid, &fc->params.twalk.newfid);
+ p9_put_int16(bufp, nwname, &fc->params.twalk.nwname);
+ for (i = 0; i < nwname; i++) {
+ p9_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_twalk);
+
+struct p9_fcall *p9_create_topen(u32 fid, u8 mode)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 1; /* fid[4] mode[1] */
+ fc = p9_create_common(bufp, size, P9_TOPEN);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.topen.fid);
+ p9_put_int8(bufp, mode, &fc->params.topen.mode);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_topen);
+
+struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode,
+ char *extension, int dotu)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ /* fid[4] name[s] perm[4] mode[1] */
+ size = 4 + 2 + strlen(name) + 4 + 1;
+ if (dotu) {
+ size += 2 + /* extension[s] */
+ (extension == NULL ? 0 : strlen(extension));
+ }
+
+ fc = p9_create_common(bufp, size, P9_TCREATE);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tcreate.fid);
+ p9_put_str(bufp, name, &fc->params.tcreate.name);
+ p9_put_int32(bufp, perm, &fc->params.tcreate.perm);
+ p9_put_int8(bufp, mode, &fc->params.tcreate.mode);
+ if (dotu)
+ p9_put_str(bufp, extension, &fc->params.tcreate.extension);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tcreate);
+
+struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */
+ fc = p9_create_common(bufp, size, P9_TREAD);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tread.fid);
+ p9_put_int64(bufp, offset, &fc->params.tread.offset);
+ p9_put_int32(bufp, count, &fc->params.tread.count);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tread);
+
+struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count,
+ const char *data)
+{
+ int size, err;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ /* fid[4] offset[8] count[4] data[count] */
+ size = 4 + 8 + 4 + count;
+ fc = p9_create_common(bufp, size, P9_TWRITE);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.twrite.fid);
+ p9_put_int64(bufp, offset, &fc->params.twrite.offset);
+ p9_put_int32(bufp, count, &fc->params.twrite.count);
+ err = p9_put_data(bufp, data, count, &fc->params.twrite.data);
+ if (err) {
+ kfree(fc);
+ fc = ERR_PTR(err);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_twrite);
+
+struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count,
+ const char __user *data)
+{
+ int size, err;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ /* fid[4] offset[8] count[4] data[count] */
+ size = 4 + 8 + 4 + count;
+ fc = p9_create_common(bufp, size, P9_TWRITE);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.twrite.fid);
+ p9_put_int64(bufp, offset, &fc->params.twrite.offset);
+ p9_put_int32(bufp, count, &fc->params.twrite.count);
+ err = p9_put_user_data(bufp, data, count, &fc->params.twrite.data);
+ if (err) {
+ kfree(fc);
+ fc = ERR_PTR(err);
+ }
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_twrite_u);
+
+struct p9_fcall *p9_create_tclunk(u32 fid)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = p9_create_common(bufp, size, P9_TCLUNK);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tclunk.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tclunk);
+
+struct p9_fcall *p9_create_tremove(u32 fid)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = p9_create_common(bufp, size, P9_TREMOVE);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tremove.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tremove);
+
+struct p9_fcall *p9_create_tstat(u32 fid)
+{
+ int size;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ size = 4; /* fid[4] */
+ fc = p9_create_common(bufp, size, P9_TSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.tstat.fid);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_tstat);
+
+struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat,
+ int dotu)
+{
+ int size, statsz;
+ struct p9_fcall *fc;
+ struct cbuf buffer;
+ struct cbuf *bufp = &buffer;
+
+ statsz = p9_size_wstat(wstat, dotu);
+ size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */
+ fc = p9_create_common(bufp, size, P9_TWSTAT);
+ if (IS_ERR(fc))
+ goto error;
+
+ p9_put_int32(bufp, fid, &fc->params.twstat.fid);
+ buf_put_int16(bufp, statsz + 2);
+ p9_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, dotu);
+
+ if (buf_check_overflow(bufp)) {
+ kfree(fc);
+ fc = ERR_PTR(-ENOMEM);
+ }
+error:
+ return fc;
+}
+EXPORT_SYMBOL(p9_create_twstat);
--- /dev/null
+/*
+ * linux/fs/9p/error.c
+ *
+ * Error string handling
+ *
+ * Plan 9 uses error strings, Unix uses error numbers. These functions
+ * try to help manage that and provide for dynamically adding error
+ * mappings.
+ *
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/jhash.h>
+#include <linux/errno.h>
+#include <net/9p/9p.h>
+
+struct errormap {
+ char *name;
+ int val;
+
+ int namelen;
+ struct hlist_node list;
+};
+
+#define ERRHASHSZ 32
+static struct hlist_head hash_errmap[ERRHASHSZ];
+
+/* FixMe - reduce to a reasonable size */
+static struct errormap errmap[] = {
+ {"Operation not permitted", EPERM},
+ {"wstat prohibited", EPERM},
+ {"No such file or directory", ENOENT},
+ {"directory entry not found", ENOENT},
+ {"file not found", ENOENT},
+ {"Interrupted system call", EINTR},
+ {"Input/output error", EIO},
+ {"No such device or address", ENXIO},
+ {"Argument list too long", E2BIG},
+ {"Bad file descriptor", EBADF},
+ {"Resource temporarily unavailable", EAGAIN},
+ {"Cannot allocate memory", ENOMEM},
+ {"Permission denied", EACCES},
+ {"Bad address", EFAULT},
+ {"Block device required", ENOTBLK},
+ {"Device or resource busy", EBUSY},
+ {"File exists", EEXIST},
+ {"Invalid cross-device link", EXDEV},
+ {"No such device", ENODEV},
+ {"Not a directory", ENOTDIR},
+ {"Is a directory", EISDIR},
+ {"Invalid argument", EINVAL},
+ {"Too many open files in system", ENFILE},
+ {"Too many open files", EMFILE},
+ {"Text file busy", ETXTBSY},
+ {"File too large", EFBIG},
+ {"No space left on device", ENOSPC},
+ {"Illegal seek", ESPIPE},
+ {"Read-only file system", EROFS},
+ {"Too many links", EMLINK},
+ {"Broken pipe", EPIPE},
+ {"Numerical argument out of domain", EDOM},
+ {"Numerical result out of range", ERANGE},
+ {"Resource deadlock avoided", EDEADLK},
+ {"File name too long", ENAMETOOLONG},
+ {"No locks available", ENOLCK},
+ {"Function not implemented", ENOSYS},
+ {"Directory not empty", ENOTEMPTY},
+ {"Too many levels of symbolic links", ELOOP},
+ {"No message of desired type", ENOMSG},
+ {"Identifier removed", EIDRM},
+ {"No data available", ENODATA},
+ {"Machine is not on the network", ENONET},
+ {"Package not installed", ENOPKG},
+ {"Object is remote", EREMOTE},
+ {"Link has been severed", ENOLINK},
+ {"Communication error on send", ECOMM},
+ {"Protocol error", EPROTO},
+ {"Bad message", EBADMSG},
+ {"File descriptor in bad state", EBADFD},
+ {"Streams pipe error", ESTRPIPE},
+ {"Too many users", EUSERS},
+ {"Socket operation on non-socket", ENOTSOCK},
+ {"Message too long", EMSGSIZE},
+ {"Protocol not available", ENOPROTOOPT},
+ {"Protocol not supported", EPROTONOSUPPORT},
+ {"Socket type not supported", ESOCKTNOSUPPORT},
+ {"Operation not supported", EOPNOTSUPP},
+ {"Protocol family not supported", EPFNOSUPPORT},
+ {"Network is down", ENETDOWN},
+ {"Network is unreachable", ENETUNREACH},
+ {"Network dropped connection on reset", ENETRESET},
+ {"Software caused connection abort", ECONNABORTED},
+ {"Connection reset by peer", ECONNRESET},
+ {"No buffer space available", ENOBUFS},
+ {"Transport endpoint is already connected", EISCONN},
+ {"Transport endpoint is not connected", ENOTCONN},
+ {"Cannot send after transport endpoint shutdown", ESHUTDOWN},
+ {"Connection timed out", ETIMEDOUT},
+ {"Connection refused", ECONNREFUSED},
+ {"Host is down", EHOSTDOWN},
+ {"No route to host", EHOSTUNREACH},
+ {"Operation already in progress", EALREADY},
+ {"Operation now in progress", EINPROGRESS},
+ {"Is a named type file", EISNAM},
+ {"Remote I/O error", EREMOTEIO},
+ {"Disk quota exceeded", EDQUOT},
+/* errors from fossil, vacfs, and u9fs */
+ {"fid unknown or out of range", EBADF},
+ {"permission denied", EACCES},
+ {"file does not exist", ENOENT},
+ {"authentication failed", ECONNREFUSED},
+ {"bad offset in directory read", ESPIPE},
+ {"bad use of fid", EBADF},
+ {"wstat can't convert between files and directories", EPERM},
+ {"directory is not empty", ENOTEMPTY},
+ {"file exists", EEXIST},
+ {"file already exists", EEXIST},
+ {"file or directory already exists", EEXIST},
+ {"fid already in use", EBADF},
+ {"file in use", ETXTBSY},
+ {"i/o error", EIO},
+ {"file already open for I/O", ETXTBSY},
+ {"illegal mode", EINVAL},
+ {"illegal name", ENAMETOOLONG},
+ {"not a directory", ENOTDIR},
+ {"not a member of proposed group", EPERM},
+ {"not owner", EACCES},
+ {"only owner can change group in wstat", EACCES},
+ {"read only file system", EROFS},
+ {"no access to special file", EPERM},
+ {"i/o count too large", EIO},
+ {"unknown group", EINVAL},
+ {"unknown user", EINVAL},
+ {"bogus wstat buffer", EPROTO},
+ {"exclusive use file already open", EAGAIN},
+ {"corrupted directory entry", EIO},
+ {"corrupted file entry", EIO},
+ {"corrupted block label", EIO},
+ {"corrupted meta data", EIO},
+ {"illegal offset", EINVAL},
+ {"illegal path element", ENOENT},
+ {"root of file system is corrupted", EIO},
+ {"corrupted super block", EIO},
+ {"protocol botch", EPROTO},
+ {"file system is full", ENOSPC},
+ {"file is in use", EAGAIN},
+ {"directory entry is not allocated", ENOENT},
+ {"file is read only", EROFS},
+ {"file has been removed", EIDRM},
+ {"only support truncation to zero length", EPERM},
+ {"cannot remove root", EPERM},
+ {"file too big", EFBIG},
+ {"venti i/o error", EIO},
+ /* these are not errors */
+ {"u9fs rhostsauth: no authentication required", 0},
+ {"u9fs authnone: no authentication required", 0},
+ {NULL, -1}
+};
+
+/**
+ * p9_error_init - preload
+ * @errstr: error string
+ *
+ */
+
+int p9_error_init(void)
+{
+ struct errormap *c;
+ int bucket;
+
+ /* initialize hash table */
+ for (bucket = 0; bucket < ERRHASHSZ; bucket++)
+ INIT_HLIST_HEAD(&hash_errmap[bucket]);
+
+ /* load initial error map into hash table */
+ for (c = errmap; c->name != NULL; c++) {
+ c->namelen = strlen(c->name);
+ bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
+ INIT_HLIST_NODE(&c->list);
+ hlist_add_head(&c->list, &hash_errmap[bucket]);
+ }
+
+ return 1;
+}
+EXPORT_SYMBOL(p9_error_init);
+
+/**
+ * errstr2errno - convert error string to error number
+ * @errstr: error string
+ *
+ */
+
+int p9_errstr2errno(char *errstr, int len)
+{
+ int errno;
+ struct hlist_node *p;
+ struct errormap *c;
+ int bucket;
+
+ errno = 0;
+ p = NULL;
+ c = NULL;
+ bucket = jhash(errstr, len, 0) % ERRHASHSZ;
+ hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
+ if (c->namelen == len && !memcmp(c->name, errstr, len)) {
+ errno = c->val;
+ break;
+ }
+ }
+
+ if (errno == 0) {
+ /* TODO: if error isn't found, add it dynamically */
+ errstr[len] = 0;
+ printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__,
+ errstr);
+ errno = 1;
+ }
+
+ return -errno;
+}
+EXPORT_SYMBOL(p9_errstr2errno);
--- /dev/null
+/*
+ * net/9p/fcprint.c
+ *
+ * Print 9P call.
+ *
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/idr.h>
+#include <net/9p/9p.h>
+
+#ifdef CONFIG_NET_9P_DEBUG
+
+static int
+p9_printqid(char *buf, int buflen, struct p9_qid *q)
+{
+ int n;
+ char b[10];
+
+ n = 0;
+ if (q->type & P9_QTDIR)
+ b[n++] = 'd';
+ if (q->type & P9_QTAPPEND)
+ b[n++] = 'a';
+ if (q->type & P9_QTAUTH)
+ b[n++] = 'A';
+ if (q->type & P9_QTEXCL)
+ b[n++] = 'l';
+ if (q->type & P9_QTTMP)
+ b[n++] = 't';
+ if (q->type & P9_QTSYMLINK)
+ b[n++] = 'L';
+ b[n] = '\0';
+
+ return scnprintf(buf, buflen, "(%.16llx %x %s)",
+ (long long int) q->path, q->version, b);
+}
+
+static int
+p9_printperm(char *buf, int buflen, int perm)
+{
+ int n;
+ char b[15];
+
+ n = 0;
+ if (perm & P9_DMDIR)
+ b[n++] = 'd';
+ if (perm & P9_DMAPPEND)
+ b[n++] = 'a';
+ if (perm & P9_DMAUTH)
+ b[n++] = 'A';
+ if (perm & P9_DMEXCL)
+ b[n++] = 'l';
+ if (perm & P9_DMTMP)
+ b[n++] = 't';
+ if (perm & P9_DMDEVICE)
+ b[n++] = 'D';
+ if (perm & P9_DMSOCKET)
+ b[n++] = 'S';
+ if (perm & P9_DMNAMEDPIPE)
+ b[n++] = 'P';
+ if (perm & P9_DMSYMLINK)
+ b[n++] = 'L';
+ b[n] = '\0';
+
+ return scnprintf(buf, buflen, "%s%03o", b, perm&077);
+}
+
+static int
+p9_printstat(char *buf, int buflen, struct p9_stat *st, int extended)
+{
+ int n;
+
+ n = scnprintf(buf, buflen, "'%.*s' '%.*s'", st->name.len,
+ st->name.str, st->uid.len, st->uid.str);
+ if (extended)
+ n += scnprintf(buf+n, buflen-n, "(%d)", st->n_uid);
+
+ n += scnprintf(buf+n, buflen-n, " '%.*s'", st->gid.len, st->gid.str);
+ if (extended)
+ n += scnprintf(buf+n, buflen-n, "(%d)", st->n_gid);
+
+ n += scnprintf(buf+n, buflen-n, " '%.*s'", st->muid.len, st->muid.str);
+ if (extended)
+ n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid);
+
+ n += scnprintf(buf+n, buflen-n, " q ");
+ n += p9_printqid(buf+n, buflen-n, &st->qid);
+ n += scnprintf(buf+n, buflen-n, " m ");
+ n += p9_printperm(buf+n, buflen-n, st->mode);
+ n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld",
+ st->atime, st->mtime, (long long int) st->length);
+
+ if (extended)
+ n += scnprintf(buf+n, buflen-n, " ext '%.*s'",
+ st->extension.len, st->extension.str);
+
+ return n;
+}
+
+static int
+p9_dumpdata(char *buf, int buflen, u8 *data, int datalen)
+{
+ int i, n;
+
+ i = n = 0;
+ while (i < datalen) {
+ n += scnprintf(buf + n, buflen - n, "%02x", data[i]);
+ if (i%4 == 3)
+ n += scnprintf(buf + n, buflen - n, " ");
+ if (i%32 == 31)
+ n += scnprintf(buf + n, buflen - n, "\n");
+
+ i++;
+ }
+ n += scnprintf(buf + n, buflen - n, "\n");
+
+ return n;
+}
+
+static int
+p9_printdata(char *buf, int buflen, u8 *data, int datalen)
+{
+ return p9_dumpdata(buf, buflen, data, datalen < 16?datalen:16);
+}
+
+int
+p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
+{
+ int i, ret, type, tag;
+
+ if (!fc)
+ return scnprintf(buf, buflen, "<NULL>");
+
+ type = fc->id;
+ tag = fc->tag;
+
+ ret = 0;
+ switch (type) {
+ case P9_TVERSION:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Tversion tag %u msize %u version '%.*s'", tag,
+ fc->params.tversion.msize,
+ fc->params.tversion.version.len,
+ fc->params.tversion.version.str);
+ break;
+
+ case P9_RVERSION:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Rversion tag %u msize %u version '%.*s'", tag,
+ fc->params.rversion.msize,
+ fc->params.rversion.version.len,
+ fc->params.rversion.version.str);
+ break;
+
+ case P9_TAUTH:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag,
+ fc->params.tauth.afid, fc->params.tauth.uname.len,
+ fc->params.tauth.uname.str, fc->params.tauth.aname.len,
+ fc->params.tauth.aname.str);
+ break;
+
+ case P9_RAUTH:
+ ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag);
+ p9_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid);
+ break;
+
+ case P9_TATTACH:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'", tag,
+ fc->params.tattach.fid, fc->params.tattach.afid,
+ fc->params.tattach.uname.len, fc->params.tattach.uname.str,
+ fc->params.tattach.aname.len, fc->params.tattach.aname.str);
+ break;
+
+ case P9_RATTACH:
+ ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ",
+ tag);
+ p9_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid);
+ break;
+
+ case P9_RERROR:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Rerror tag %u ename '%.*s'", tag,
+ fc->params.rerror.error.len,
+ fc->params.rerror.error.str);
+ if (extended)
+ ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n",
+ fc->params.rerror.errno);
+ break;
+
+ case P9_TFLUSH:
+ ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u",
+ tag, fc->params.tflush.oldtag);
+ break;
+
+ case P9_RFLUSH:
+ ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag);
+ break;
+
+ case P9_TWALK:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Twalk tag %u fid %d newfid %d nwname %d", tag,
+ fc->params.twalk.fid, fc->params.twalk.newfid,
+ fc->params.twalk.nwname);
+ for (i = 0; i < fc->params.twalk.nwname; i++)
+ ret += scnprintf(buf+ret, buflen-ret, " '%.*s'",
+ fc->params.twalk.wnames[i].len,
+ fc->params.twalk.wnames[i].str);
+ break;
+
+ case P9_RWALK:
+ ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d",
+ tag, fc->params.rwalk.nwqid);
+ for (i = 0; i < fc->params.rwalk.nwqid; i++)
+ ret += p9_printqid(buf+ret, buflen-ret,
+ &fc->params.rwalk.wqids[i]);
+ break;
+
+ case P9_TOPEN:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Topen tag %u fid %d mode %d", tag,
+ fc->params.topen.fid, fc->params.topen.mode);
+ break;
+
+ case P9_ROPEN:
+ ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag);
+ ret += p9_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid);
+ ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
+ fc->params.ropen.iounit);
+ break;
+
+ case P9_TCREATE:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Tcreate tag %u fid %d name '%.*s' perm ", tag,
+ fc->params.tcreate.fid, fc->params.tcreate.name.len,
+ fc->params.tcreate.name.str);
+
+ ret += p9_printperm(buf+ret, buflen-ret,
+ fc->params.tcreate.perm);
+ ret += scnprintf(buf+ret, buflen-ret, " mode %d",
+ fc->params.tcreate.mode);
+ break;
+
+ case P9_RCREATE:
+ ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag);
+ ret += p9_printqid(buf+ret, buflen-ret,
+ &fc->params.rcreate.qid);
+ ret += scnprintf(buf+ret, buflen-ret, " iounit %d",
+ fc->params.rcreate.iounit);
+ break;
+
+ case P9_TREAD:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Tread tag %u fid %d offset %lld count %u", tag,
+ fc->params.tread.fid,
+ (long long int) fc->params.tread.offset,
+ fc->params.tread.count);
+ break;
+
+ case P9_RREAD:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Rread tag %u count %u data ", tag,
+ fc->params.rread.count);
+ ret += p9_printdata(buf+ret, buflen-ret, fc->params.rread.data,
+ fc->params.rread.count);
+ break;
+
+ case P9_TWRITE:
+ ret += scnprintf(buf+ret, buflen-ret,
+ "Twrite tag %u fid %d offset %lld count %u data ",
+ tag, fc->params.twrite.fid,
+ (long long int) fc->params.twrite.offset,
+ fc->params.twrite.count);
+ ret += p9_printdata(buf+ret, buflen-ret, fc->params.twrite.data,
+ fc->params.twrite.count);
+ break;
+
+ case P9_RWRITE:
+ ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u",
+ tag, fc->params.rwrite.count);
+ break;
+
+ case P9_TCLUNK:
+ ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d",
+ tag, fc->params.tclunk.fid);
+ break;
+
+ case P9_RCLUNK:
+ ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag);
+ break;
+
+ case P9_TREMOVE:
+ ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d",
+ tag, fc->params.tremove.fid);
+ break;
+
+ case P9_RREMOVE:
+ ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag);
+ break;
+
+ case P9_TSTAT:
+ ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d",
+ tag, fc->params.tstat.fid);
+ break;
+
+ case P9_RSTAT:
+ ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag);
+ ret += p9_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat,
+ extended);
+ break;
+
+ case P9_TWSTAT:
+ ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ",
+ tag, fc->params.twstat.fid);
+ ret += p9_printstat(buf+ret, buflen-ret,
+ &fc->params.twstat.stat, extended);
+ break;
+
+ case P9_RWSTAT:
+ ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag);
+ break;
+
+ default:
+ ret += scnprintf(buf+ret, buflen-ret, "unknown type %d", type);
+ break;
+ }
+
+ return ret;
+}
+
+#else
+int
+p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended)
+{
+ return 0;
+}
+EXPORT_SYMBOL(p9_printfcall);
+#endif /* CONFIG_NET_9P_DEBUG */
--- /dev/null
+/*
+ * net/9p/9p.c
+ *
+ * 9P entry point
+ *
+ * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <net/9p/9p.h>
+
+#ifdef CONFIG_NET_9P_DEBUG
+unsigned int p9_debug_level = 0; /* feature-rific global debug level */
+EXPORT_SYMBOL(p9_debug_level);
+module_param_named(debug, p9_debug_level, uint, 0);
+MODULE_PARM_DESC(debug, "9P debugging level");
+#endif
+
+extern int p9_mux_global_init(void);
+extern void p9_mux_global_exit(void);
+extern int p9_sysctl_register(void);
+extern void p9_sysctl_unregister(void);
+
+/**
+ * v9fs_init - Initialize module
+ *
+ */
+static int __init init_p9(void)
+{
+ int ret;
+
+ p9_error_init();
+ printk(KERN_INFO "Installing 9P2000 support\n");
+ ret = p9_mux_global_init();
+ if (ret) {
+ printk(KERN_WARNING "9p: starting mux failed\n");
+ return ret;
+ }
+
+ ret = p9_sysctl_register();
+ if (ret) {
+ printk(KERN_WARNING "9p: registering sysctl failed\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+/**
+ * v9fs_init - shutdown module
+ *
+ */
+
+static void __exit exit_p9(void)
+{
+ p9_sysctl_unregister();
+ p9_mux_global_exit();
+}
+
+module_init(init_p9)
+module_exit(exit_p9)
+
+MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
+MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
+MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>");
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * net/9p/mux.c
+ *
+ * Protocol Multiplexer
+ *
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/poll.h>
+#include <linux/kthread.h>
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+#include <net/9p/conn.h>
+
+#define ERREQFLUSH 1
+#define SCHED_TIMEOUT 10
+#define MAXPOLLWADDR 2
+
+enum {
+ Rworksched = 1, /* read work scheduled or running */
+ Rpending = 2, /* can read */
+ Wworksched = 4, /* write work scheduled or running */
+ Wpending = 8, /* can write */
+};
+
+enum {
+ None,
+ Flushing,
+ Flushed,
+};
+
+struct p9_mux_poll_task;
+
+struct p9_req {
+ spinlock_t lock; /* protect request structure */
+ int tag;
+ struct p9_fcall *tcall;
+ struct p9_fcall *rcall;
+ int err;
+ p9_conn_req_callback cb;
+ void *cba;
+ int flush;
+ struct list_head req_list;
+};
+
+struct p9_conn {
+ spinlock_t lock; /* protect lock structure */
+ struct list_head mux_list;
+ struct p9_mux_poll_task *poll_task;
+ int msize;
+ unsigned char *extended;
+ struct p9_transport *trans;
+ struct p9_idpool *tagpool;
+ int err;
+ wait_queue_head_t equeue;
+ struct list_head req_list;
+ struct list_head unsent_req_list;
+ struct p9_fcall *rcall;
+ int rpos;
+ char *rbuf;
+ int wpos;
+ int wsize;
+ char *wbuf;
+ wait_queue_t poll_wait[MAXPOLLWADDR];
+ wait_queue_head_t *poll_waddr[MAXPOLLWADDR];
+ poll_table pt;
+ struct work_struct rq;
+ struct work_struct wq;
+ unsigned long wsched;
+};
+
+struct p9_mux_poll_task {
+ struct task_struct *task;
+ struct list_head mux_list;
+ int muxnum;
+};
+
+struct p9_mux_rpc {
+ struct p9_conn *m;
+ int err;
+ struct p9_fcall *tcall;
+ struct p9_fcall *rcall;
+ wait_queue_head_t wqueue;
+};
+
+static int p9_poll_proc(void *);
+static void p9_read_work(struct work_struct *work);
+static void p9_write_work(struct work_struct *work);
+static void p9_pollwait(struct file *filp, wait_queue_head_t *wait_address,
+ poll_table * p);
+static u16 p9_mux_get_tag(struct p9_conn *);
+static void p9_mux_put_tag(struct p9_conn *, u16);
+
+static DEFINE_MUTEX(p9_mux_task_lock);
+static struct workqueue_struct *p9_mux_wq;
+
+static int p9_mux_num;
+static int p9_mux_poll_task_num;
+static struct p9_mux_poll_task p9_mux_poll_tasks[100];
+
+int p9_mux_global_init(void)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++)
+ p9_mux_poll_tasks[i].task = NULL;
+
+ p9_mux_wq = create_workqueue("v9fs");
+ if (!p9_mux_wq) {
+ printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void p9_mux_global_exit(void)
+{
+ destroy_workqueue(p9_mux_wq);
+}
+
+/**
+ * p9_mux_calc_poll_procs - calculates the number of polling procs
+ * based on the number of mounted v9fs filesystems.
+ *
+ * The current implementation returns sqrt of the number of mounts.
+ */
+static int p9_mux_calc_poll_procs(int muxnum)
+{
+ int n;
+
+ if (p9_mux_poll_task_num)
+ n = muxnum / p9_mux_poll_task_num +
+ (muxnum % p9_mux_poll_task_num ? 1 : 0);
+ else
+ n = 1;
+
+ if (n > ARRAY_SIZE(p9_mux_poll_tasks))
+ n = ARRAY_SIZE(p9_mux_poll_tasks);
+
+ return n;
+}
+
+static int p9_mux_poll_start(struct p9_conn *m)
+{
+ int i, n;
+ struct p9_mux_poll_task *vpt, *vptlast;
+ struct task_struct *pproc;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, p9_mux_num,
+ p9_mux_poll_task_num);
+ mutex_lock(&p9_mux_task_lock);
+
+ n = p9_mux_calc_poll_procs(p9_mux_num + 1);
+ if (n > p9_mux_poll_task_num) {
+ for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++) {
+ if (p9_mux_poll_tasks[i].task == NULL) {
+ vpt = &p9_mux_poll_tasks[i];
+ P9_DPRINTK(P9_DEBUG_MUX, "create proc %p\n",
+ vpt);
+ pproc = kthread_create(p9_poll_proc, vpt,
+ "v9fs-poll");
+
+ if (!IS_ERR(pproc)) {
+ vpt->task = pproc;
+ INIT_LIST_HEAD(&vpt->mux_list);
+ vpt->muxnum = 0;
+ p9_mux_poll_task_num++;
+ wake_up_process(vpt->task);
+ }
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(p9_mux_poll_tasks))
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "warning: no free poll slots\n");
+ }
+
+ n = (p9_mux_num + 1) / p9_mux_poll_task_num +
+ ((p9_mux_num + 1) % p9_mux_poll_task_num ? 1 : 0);
+
+ vptlast = NULL;
+ for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++) {
+ vpt = &p9_mux_poll_tasks[i];
+ if (vpt->task != NULL) {
+ vptlast = vpt;
+ if (vpt->muxnum < n) {
+ P9_DPRINTK(P9_DEBUG_MUX, "put in proc %d\n", i);
+ list_add(&m->mux_list, &vpt->mux_list);
+ vpt->muxnum++;
+ m->poll_task = vpt;
+ memset(&m->poll_waddr, 0,
+ sizeof(m->poll_waddr));
+ init_poll_funcptr(&m->pt, p9_pollwait);
+ break;
+ }
+ }
+ }
+
+ if (i >= ARRAY_SIZE(p9_mux_poll_tasks)) {
+ if (vptlast == NULL)
+ return -ENOMEM;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "put in proc %d\n", i);
+ list_add(&m->mux_list, &vptlast->mux_list);
+ vptlast->muxnum++;
+ m->poll_task = vptlast;
+ memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
+ init_poll_funcptr(&m->pt, p9_pollwait);
+ }
+
+ p9_mux_num++;
+ mutex_unlock(&p9_mux_task_lock);
+
+ return 0;
+}
+
+static void p9_mux_poll_stop(struct p9_conn *m)
+{
+ int i;
+ struct p9_mux_poll_task *vpt;
+
+ mutex_lock(&p9_mux_task_lock);
+ vpt = m->poll_task;
+ list_del(&m->mux_list);
+ for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
+ if (m->poll_waddr[i] != NULL) {
+ remove_wait_queue(m->poll_waddr[i], &m->poll_wait[i]);
+ m->poll_waddr[i] = NULL;
+ }
+ }
+ vpt->muxnum--;
+ if (!vpt->muxnum) {
+ P9_DPRINTK(P9_DEBUG_MUX, "destroy proc %p\n", vpt);
+ kthread_stop(vpt->task);
+ vpt->task = NULL;
+ p9_mux_poll_task_num--;
+ }
+ p9_mux_num--;
+ mutex_unlock(&p9_mux_task_lock);
+}
+
+/**
+ * p9_conn_create - allocate and initialize the per-session mux data
+ * Creates the polling task if this is the first session.
+ *
+ * @trans - transport structure
+ * @msize - maximum message size
+ * @extended - pointer to the extended flag
+ */
+struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize,
+ unsigned char *extended)
+{
+ int i, n;
+ struct p9_conn *m, *mtmp;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "transport %p msize %d\n", trans, msize);
+ m = kmalloc(sizeof(struct p9_conn), GFP_KERNEL);
+ if (!m)
+ return ERR_PTR(-ENOMEM);
+
+ spin_lock_init(&m->lock);
+ INIT_LIST_HEAD(&m->mux_list);
+ m->msize = msize;
+ m->extended = extended;
+ m->trans = trans;
+ m->tagpool = p9_idpool_create();
+ if (!m->tagpool) {
+ kfree(m);
+ return ERR_PTR(PTR_ERR(m->tagpool));
+ }
+
+ m->err = 0;
+ init_waitqueue_head(&m->equeue);
+ INIT_LIST_HEAD(&m->req_list);
+ INIT_LIST_HEAD(&m->unsent_req_list);
+ m->rcall = NULL;
+ m->rpos = 0;
+ m->rbuf = NULL;
+ m->wpos = m->wsize = 0;
+ m->wbuf = NULL;
+ INIT_WORK(&m->rq, p9_read_work);
+ INIT_WORK(&m->wq, p9_write_work);
+ m->wsched = 0;
+ memset(&m->poll_waddr, 0, sizeof(m->poll_waddr));
+ m->poll_task = NULL;
+ n = p9_mux_poll_start(m);
+ if (n)
+ return ERR_PTR(n);
+
+ n = trans->poll(trans, &m->pt);
+ if (n & POLLIN) {
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m);
+ set_bit(Rpending, &m->wsched);
+ }
+
+ if (n & POLLOUT) {
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m);
+ set_bit(Wpending, &m->wsched);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) {
+ if (IS_ERR(m->poll_waddr[i])) {
+ p9_mux_poll_stop(m);
+ mtmp = (void *)m->poll_waddr; /* the error code */
+ kfree(m);
+ m = mtmp;
+ break;
+ }
+ }
+
+ return m;
+}
+EXPORT_SYMBOL(p9_conn_create);
+
+/**
+ * p9_mux_destroy - cancels all pending requests and frees mux resources
+ */
+void p9_conn_destroy(struct p9_conn *m)
+{
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p prev %p next %p\n", m,
+ m->mux_list.prev, m->mux_list.next);
+ p9_conn_cancel(m, -ECONNRESET);
+
+ if (!list_empty(&m->req_list)) {
+ /* wait until all processes waiting on this session exit */
+ P9_DPRINTK(P9_DEBUG_MUX,
+ "mux %p waiting for empty request queue\n", m);
+ wait_event_timeout(m->equeue, (list_empty(&m->req_list)), 5000);
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p request queue empty: %d\n", m,
+ list_empty(&m->req_list));
+ }
+
+ p9_mux_poll_stop(m);
+ m->trans = NULL;
+ p9_idpool_destroy(m->tagpool);
+ kfree(m);
+}
+EXPORT_SYMBOL(p9_conn_destroy);
+
+/**
+ * p9_pollwait - called by files poll operation to add v9fs-poll task
+ * to files wait queue
+ */
+static void
+p9_pollwait(struct file *filp, wait_queue_head_t *wait_address,
+ poll_table * p)
+{
+ int i;
+ struct p9_conn *m;
+
+ m = container_of(p, struct p9_conn, pt);
+ for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++)
+ if (m->poll_waddr[i] == NULL)
+ break;
+
+ if (i >= ARRAY_SIZE(m->poll_waddr)) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "not enough wait_address slots\n");
+ return;
+ }
+
+ m->poll_waddr[i] = wait_address;
+
+ if (!wait_address) {
+ P9_DPRINTK(P9_DEBUG_ERROR, "no wait_address\n");
+ m->poll_waddr[i] = ERR_PTR(-EIO);
+ return;
+ }
+
+ init_waitqueue_entry(&m->poll_wait[i], m->poll_task->task);
+ add_wait_queue(wait_address, &m->poll_wait[i]);
+}
+
+/**
+ * p9_poll_mux - polls a mux and schedules read or write works if necessary
+ */
+static void p9_poll_mux(struct p9_conn *m)
+{
+ int n;
+
+ if (m->err < 0)
+ return;
+
+ n = m->trans->poll(m->trans, NULL);
+ if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) {
+ P9_DPRINTK(P9_DEBUG_MUX, "error mux %p err %d\n", m, n);
+ if (n >= 0)
+ n = -ECONNRESET;
+ p9_conn_cancel(m, n);
+ }
+
+ if (n & POLLIN) {
+ set_bit(Rpending, &m->wsched);
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m);
+ if (!test_and_set_bit(Rworksched, &m->wsched)) {
+ P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m);
+ queue_work(p9_mux_wq, &m->rq);
+ }
+ }
+
+ if (n & POLLOUT) {
+ set_bit(Wpending, &m->wsched);
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m);
+ if ((m->wsize || !list_empty(&m->unsent_req_list))
+ && !test_and_set_bit(Wworksched, &m->wsched)) {
+ P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m);
+ queue_work(p9_mux_wq, &m->wq);
+ }
+ }
+}
+
+/**
+ * p9_poll_proc - polls all v9fs transports for new events and queues
+ * the appropriate work to the work queue
+ */
+static int p9_poll_proc(void *a)
+{
+ struct p9_conn *m, *mtmp;
+ struct p9_mux_poll_task *vpt;
+
+ vpt = a;
+ P9_DPRINTK(P9_DEBUG_MUX, "start %p %p\n", current, vpt);
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
+ p9_poll_mux(m);
+ }
+
+ P9_DPRINTK(P9_DEBUG_MUX, "sleeping...\n");
+ schedule_timeout(SCHED_TIMEOUT * HZ);
+ }
+
+ __set_current_state(TASK_RUNNING);
+ P9_DPRINTK(P9_DEBUG_MUX, "finish\n");
+ return 0;
+}
+
+/**
+ * p9_write_work - called when a transport can send some data
+ */
+static void p9_write_work(struct work_struct *work)
+{
+ int n, err;
+ struct p9_conn *m;
+ struct p9_req *req;
+
+ m = container_of(work, struct p9_conn, wq);
+
+ if (m->err < 0) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
+
+ if (!m->wsize) {
+ if (list_empty(&m->unsent_req_list)) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
+
+ spin_lock(&m->lock);
+again:
+ req = list_entry(m->unsent_req_list.next, struct p9_req,
+ req_list);
+ list_move_tail(&req->req_list, &m->req_list);
+ if (req->err == ERREQFLUSH)
+ goto again;
+
+ m->wbuf = req->tcall->sdata;
+ m->wsize = req->tcall->size;
+ m->wpos = 0;
+ spin_unlock(&m->lock);
+ }
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos,
+ m->wsize);
+ clear_bit(Wpending, &m->wsched);
+ err = m->trans->write(m->trans, m->wbuf + m->wpos, m->wsize - m->wpos);
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p sent %d bytes\n", m, err);
+ if (err == -EAGAIN) {
+ clear_bit(Wworksched, &m->wsched);
+ return;
+ }
+
+ if (err <= 0)
+ goto error;
+
+ m->wpos += err;
+ if (m->wpos == m->wsize)
+ m->wpos = m->wsize = 0;
+
+ if (m->wsize == 0 && !list_empty(&m->unsent_req_list)) {
+ if (test_and_clear_bit(Wpending, &m->wsched))
+ n = POLLOUT;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLOUT) {
+ P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m);
+ queue_work(p9_mux_wq, &m->wq);
+ } else
+ clear_bit(Wworksched, &m->wsched);
+ } else
+ clear_bit(Wworksched, &m->wsched);
+
+ return;
+
+error:
+ p9_conn_cancel(m, err);
+ clear_bit(Wworksched, &m->wsched);
+}
+
+static void process_request(struct p9_conn *m, struct p9_req *req)
+{
+ int ecode;
+ struct p9_str *ename;
+
+ if (!req->err && req->rcall->id == P9_RERROR) {
+ ecode = req->rcall->params.rerror.errno;
+ ename = &req->rcall->params.rerror.error;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "Rerror %.*s\n", ename->len,
+ ename->str);
+
+ if (*m->extended)
+ req->err = -ecode;
+
+ if (!req->err) {
+ req->err = p9_errstr2errno(ename->str, ename->len);
+
+ if (!req->err) { /* string match failed */
+ PRINT_FCALL_ERROR("unknown error", req->rcall);
+ }
+
+ if (!req->err)
+ req->err = -ESERVERFAULT;
+ }
+ } else if (req->tcall && req->rcall->id != req->tcall->id + 1) {
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "fcall mismatch: expected %d, got %d\n",
+ req->tcall->id + 1, req->rcall->id);
+ if (!req->err)
+ req->err = -EIO;
+ }
+}
+
+/**
+ * p9_read_work - called when there is some data to be read from a transport
+ */
+static void p9_read_work(struct work_struct *work)
+{
+ int n, err;
+ struct p9_conn *m;
+ struct p9_req *req, *rptr, *rreq;
+ struct p9_fcall *rcall;
+ char *rbuf;
+
+ m = container_of(work, struct p9_conn, rq);
+
+ if (m->err < 0)
+ return;
+
+ rcall = NULL;
+ P9_DPRINTK(P9_DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos);
+
+ if (!m->rcall) {
+ m->rcall =
+ kmalloc(sizeof(struct p9_fcall) + m->msize, GFP_KERNEL);
+ if (!m->rcall) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ m->rbuf = (char *)m->rcall + sizeof(struct p9_fcall);
+ m->rpos = 0;
+ }
+
+ clear_bit(Rpending, &m->wsched);
+ err = m->trans->read(m->trans, m->rbuf + m->rpos, m->msize - m->rpos);
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p got %d bytes\n", m, err);
+ if (err == -EAGAIN) {
+ clear_bit(Rworksched, &m->wsched);
+ return;
+ }
+
+ if (err <= 0)
+ goto error;
+
+ m->rpos += err;
+ while (m->rpos > 4) {
+ n = le32_to_cpu(*(__le32 *) m->rbuf);
+ if (n >= m->msize) {
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "requested packet size too big: %d\n", n);
+ err = -EIO;
+ goto error;
+ }
+
+ if (m->rpos < n)
+ break;
+
+ err =
+ p9_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended);
+ if (err < 0) {
+ goto error;
+ }
+
+#ifdef CONFIG_NET_9P_DEBUG
+ if ((p9_debug_level&P9_DEBUG_FCALL) == P9_DEBUG_FCALL) {
+ char buf[150];
+
+ p9_printfcall(buf, sizeof(buf), m->rcall,
+ *m->extended);
+ printk(KERN_NOTICE ">>> %p %s\n", m, buf);
+ }
+#endif
+
+ rcall = m->rcall;
+ rbuf = m->rbuf;
+ if (m->rpos > n) {
+ m->rcall = kmalloc(sizeof(struct p9_fcall) + m->msize,
+ GFP_KERNEL);
+ if (!m->rcall) {
+ err = -ENOMEM;
+ goto error;
+ }
+
+ m->rbuf = (char *)m->rcall + sizeof(struct p9_fcall);
+ memmove(m->rbuf, rbuf + n, m->rpos - n);
+ m->rpos -= n;
+ } else {
+ m->rcall = NULL;
+ m->rbuf = NULL;
+ m->rpos = 0;
+ }
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p fcall id %d tag %d\n", m,
+ rcall->id, rcall->tag);
+
+ req = NULL;
+ spin_lock(&m->lock);
+ list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
+ if (rreq->tag == rcall->tag) {
+ req = rreq;
+ if (req->flush != Flushing)
+ list_del(&req->req_list);
+ break;
+ }
+ }
+ spin_unlock(&m->lock);
+
+ if (req) {
+ req->rcall = rcall;
+ process_request(m, req);
+
+ if (req->flush != Flushing) {
+ if (req->cb)
+ (*req->cb) (req, req->cba);
+ else
+ kfree(req->rcall);
+
+ wake_up(&m->equeue);
+ }
+ } else {
+ if (err >= 0 && rcall->id != P9_RFLUSH)
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "unexpected response mux %p id %d tag %d\n",
+ m, rcall->id, rcall->tag);
+ kfree(rcall);
+ }
+ }
+
+ if (!list_empty(&m->req_list)) {
+ if (test_and_clear_bit(Rpending, &m->wsched))
+ n = POLLIN;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLIN) {
+ P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m);
+ queue_work(p9_mux_wq, &m->rq);
+ } else
+ clear_bit(Rworksched, &m->wsched);
+ } else
+ clear_bit(Rworksched, &m->wsched);
+
+ return;
+
+error:
+ p9_conn_cancel(m, err);
+ clear_bit(Rworksched, &m->wsched);
+}
+
+/**
+ * p9_send_request - send 9P request
+ * The function can sleep until the request is scheduled for sending.
+ * The function can be interrupted. Return from the function is not
+ * a guarantee that the request is sent successfully. Can return errors
+ * that can be retrieved by PTR_ERR macros.
+ *
+ * @m: mux data
+ * @tc: request to be sent
+ * @cb: callback function to call when response is received
+ * @cba: parameter to pass to the callback function
+ */
+static struct p9_req *p9_send_request(struct p9_conn *m,
+ struct p9_fcall *tc,
+ p9_conn_req_callback cb, void *cba)
+{
+ int n;
+ struct p9_req *req;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current,
+ tc, tc->id);
+ if (m->err < 0)
+ return ERR_PTR(m->err);
+
+ req = kmalloc(sizeof(struct p9_req), GFP_KERNEL);
+ if (!req)
+ return ERR_PTR(-ENOMEM);
+
+ if (tc->id == P9_TVERSION)
+ n = P9_NOTAG;
+ else
+ n = p9_mux_get_tag(m);
+
+ if (n < 0)
+ return ERR_PTR(-ENOMEM);
+
+ p9_set_tag(tc, n);
+
+#ifdef CONFIG_NET_9P_DEBUG
+ if ((p9_debug_level&P9_DEBUG_FCALL) == P9_DEBUG_FCALL) {
+ char buf[150];
+
+ p9_printfcall(buf, sizeof(buf), tc, *m->extended);
+ printk(KERN_NOTICE "<<< %p %s\n", m, buf);
+ }
+#endif
+
+ spin_lock_init(&req->lock);
+ req->tag = n;
+ req->tcall = tc;
+ req->rcall = NULL;
+ req->err = 0;
+ req->cb = cb;
+ req->cba = cba;
+ req->flush = None;
+
+ spin_lock(&m->lock);
+ list_add_tail(&req->req_list, &m->unsent_req_list);
+ spin_unlock(&m->lock);
+
+ if (test_and_clear_bit(Wpending, &m->wsched))
+ n = POLLOUT;
+ else
+ n = m->trans->poll(m->trans, NULL);
+
+ if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched))
+ queue_work(p9_mux_wq, &m->wq);
+
+ return req;
+}
+
+static void p9_mux_free_request(struct p9_conn *m, struct p9_req *req)
+{
+ p9_mux_put_tag(m, req->tag);
+ kfree(req);
+}
+
+static void p9_mux_flush_cb(struct p9_req *freq, void *a)
+{
+ p9_conn_req_callback cb;
+ int tag;
+ struct p9_conn *m;
+ struct p9_req *req, *rreq, *rptr;
+
+ m = a;
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m,
+ freq->tcall, freq->rcall, freq->err,
+ freq->tcall->params.tflush.oldtag);
+
+ spin_lock(&m->lock);
+ cb = NULL;
+ tag = freq->tcall->params.tflush.oldtag;
+ req = NULL;
+ list_for_each_entry_safe(rreq, rptr, &m->req_list, req_list) {
+ if (rreq->tag == tag) {
+ req = rreq;
+ list_del(&req->req_list);
+ break;
+ }
+ }
+ spin_unlock(&m->lock);
+
+ if (req) {
+ spin_lock(&req->lock);
+ req->flush = Flushed;
+ spin_unlock(&req->lock);
+
+ if (req->cb)
+ (*req->cb) (req, req->cba);
+ else
+ kfree(req->rcall);
+
+ wake_up(&m->equeue);
+ }
+
+ kfree(freq->tcall);
+ kfree(freq->rcall);
+ p9_mux_free_request(m, freq);
+}
+
+static int
+p9_mux_flush_request(struct p9_conn *m, struct p9_req *req)
+{
+ struct p9_fcall *fc;
+ struct p9_req *rreq, *rptr;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
+
+ /* if a response was received for a request, do nothing */
+ spin_lock(&req->lock);
+ if (req->rcall || req->err) {
+ spin_unlock(&req->lock);
+ P9_DPRINTK(P9_DEBUG_MUX,
+ "mux %p req %p response already received\n", m, req);
+ return 0;
+ }
+
+ req->flush = Flushing;
+ spin_unlock(&req->lock);
+
+ spin_lock(&m->lock);
+ /* if the request is not sent yet, just remove it from the list */
+ list_for_each_entry_safe(rreq, rptr, &m->unsent_req_list, req_list) {
+ if (rreq->tag == req->tag) {
+ P9_DPRINTK(P9_DEBUG_MUX,
+ "mux %p req %p request is not sent yet\n", m, req);
+ list_del(&rreq->req_list);
+ req->flush = Flushed;
+ spin_unlock(&m->lock);
+ if (req->cb)
+ (*req->cb) (req, req->cba);
+ return 0;
+ }
+ }
+ spin_unlock(&m->lock);
+
+ clear_thread_flag(TIF_SIGPENDING);
+ fc = p9_create_tflush(req->tag);
+ p9_send_request(m, fc, p9_mux_flush_cb, m);
+ return 1;
+}
+
+static void
+p9_conn_rpc_cb(struct p9_req *req, void *a)
+{
+ struct p9_mux_rpc *r;
+
+ P9_DPRINTK(P9_DEBUG_MUX, "req %p r %p\n", req, a);
+ r = a;
+ r->rcall = req->rcall;
+ r->err = req->err;
+
+ if (req->flush != None && !req->err)
+ r->err = -ERESTARTSYS;
+
+ wake_up(&r->wqueue);
+}
+
+/**
+ * p9_mux_rpc - sends 9P request and waits until a response is available.
+ * The function can be interrupted.
+ * @m: mux data
+ * @tc: request to be sent
+ * @rc: pointer where a pointer to the response is stored
+ */
+int
+p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc,
+ struct p9_fcall **rc)
+{
+ int err, sigpending;
+ unsigned long flags;
+ struct p9_req *req;
+ struct p9_mux_rpc r;
+
+ r.err = 0;
+ r.tcall = tc;
+ r.rcall = NULL;
+ r.m = m;
+ init_waitqueue_head(&r.wqueue);
+
+ if (rc)
+ *rc = NULL;
+
+ sigpending = 0;
+ if (signal_pending(current)) {
+ sigpending = 1;
+ clear_thread_flag(TIF_SIGPENDING);
+ }
+
+ req = p9_send_request(m, tc, p9_conn_rpc_cb, &r);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ P9_DPRINTK(P9_DEBUG_MUX, "error %d\n", err);
+ return err;
+ }
+
+ err = wait_event_interruptible(r.wqueue, r.rcall != NULL || r.err < 0);
+ if (r.err < 0)
+ err = r.err;
+
+ if (err == -ERESTARTSYS && m->trans->status == Connected
+ && m->err == 0) {
+ if (p9_mux_flush_request(m, req)) {
+ /* wait until we get response of the flush message */
+ do {
+ clear_thread_flag(TIF_SIGPENDING);
+ err = wait_event_interruptible(r.wqueue,
+ r.rcall || r.err);
+ } while (!r.rcall && !r.err && err == -ERESTARTSYS &&
+ m->trans->status == Connected && !m->err);
+
+ err = -ERESTARTSYS;
+ }
+ sigpending = 1;
+ }
+
+ if (sigpending) {
+ spin_lock_irqsave(¤t->sighand->siglock, flags);
+ recalc_sigpending();
+ spin_unlock_irqrestore(¤t->sighand->siglock, flags);
+ }
+
+ if (rc)
+ *rc = r.rcall;
+ else
+ kfree(r.rcall);
+
+ p9_mux_free_request(m, req);
+ if (err > 0)
+ err = -EIO;
+
+ return err;
+}
+EXPORT_SYMBOL(p9_conn_rpc);
+
+#ifdef P9_NONBLOCK
+/**
+ * p9_conn_rpcnb - sends 9P request without waiting for response.
+ * @m: mux data
+ * @tc: request to be sent
+ * @cb: callback function to be called when response arrives
+ * @cba: value to pass to the callback function
+ */
+int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc,
+ p9_conn_req_callback cb, void *a)
+{
+ int err;
+ struct p9_req *req;
+
+ req = p9_send_request(m, tc, cb, a);
+ if (IS_ERR(req)) {
+ err = PTR_ERR(req);
+ P9_DPRINTK(P9_DEBUG_MUX, "error %d\n", err);
+ return PTR_ERR(req);
+ }
+
+ P9_DPRINTK(P9_DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag);
+ return 0;
+}
+EXPORT_SYMBOL(p9_conn_rpcnb);
+#endif /* P9_NONBLOCK */
+
+/**
+ * p9_conn_cancel - cancel all pending requests with error
+ * @m: mux data
+ * @err: error code
+ */
+void p9_conn_cancel(struct p9_conn *m, int err)
+{
+ struct p9_req *req, *rtmp;
+ LIST_HEAD(cancel_list);
+
+ P9_DPRINTK(P9_DEBUG_ERROR, "mux %p err %d\n", m, err);
+ m->err = err;
+ spin_lock(&m->lock);
+ list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) {
+ list_move(&req->req_list, &cancel_list);
+ }
+ list_for_each_entry_safe(req, rtmp, &m->unsent_req_list, req_list) {
+ list_move(&req->req_list, &cancel_list);
+ }
+ spin_unlock(&m->lock);
+
+ list_for_each_entry_safe(req, rtmp, &cancel_list, req_list) {
+ list_del(&req->req_list);
+ if (!req->err)
+ req->err = err;
+
+ if (req->cb)
+ (*req->cb) (req, req->cba);
+ else
+ kfree(req->rcall);
+ }
+
+ wake_up(&m->equeue);
+}
+EXPORT_SYMBOL(p9_conn_cancel);
+
+static u16 p9_mux_get_tag(struct p9_conn *m)
+{
+ int tag;
+
+ tag = p9_idpool_get(m->tagpool);
+ if (tag < 0)
+ return P9_NOTAG;
+ else
+ return (u16) tag;
+}
+
+static void p9_mux_put_tag(struct p9_conn *m, u16 tag)
+{
+ if (tag != P9_NOTAG && p9_idpool_check(tag, m->tagpool))
+ p9_idpool_put(tag, m->tagpool);
+}
--- /dev/null
+/*
+ * net/9p/sysctl.c
+ *
+ * 9P sysctl interface
+ *
+ * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/init.h>
+#include <net/9p/9p.h>
+
+enum {
+ P9_SYSCTL_NET = 487,
+ P9_SYSCTL_DEBUG = 1,
+};
+
+static ctl_table p9_table[] = {
+#ifdef CONFIG_NET_9P_DEBUG
+ {
+ .ctl_name = P9_SYSCTL_DEBUG,
+ .procname = "debug",
+ .data = &p9_debug_level,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+#endif
+ { .ctl_name = 0 },
+};
+
+static ctl_table p9_net_table[] = {
+ {
+ .ctl_name = P9_SYSCTL_NET,
+ .procname = "9p",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = p9_table,
+ },
+ { .ctl_name = 0 },
+};
+
+static ctl_table p9_ctl_table[] = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = p9_net_table,
+ },
+ { .ctl_name = 0 },
+};
+
+static struct ctl_table_header *p9_table_header;
+
+int __init p9_sysctl_register(void)
+{
+ p9_table_header = register_sysctl_table(p9_ctl_table);
+ if (!p9_table_header)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void __exit p9_sysctl_unregister(void)
+{
+ unregister_sysctl_table(p9_table_header);
+}
--- /dev/null
+/*
+ * linux/fs/9p/trans_fd.c
+ *
+ * Fd transport layer. Includes deprecated socket layer.
+ *
+ * Copyright (C) 2006 by Russ Cox <rsc@swtch.com>
+ * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/in.h>
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/ipv6.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/un.h>
+#include <linux/uaccess.h>
+#include <linux/inet.h>
+#include <linux/idr.h>
+#include <linux/file.h>
+#include <net/9p/9p.h>
+#include <net/9p/transport.h>
+
+#define P9_PORT 564
+
+struct p9_trans_fd {
+ struct file *rd;
+ struct file *wr;
+};
+
+static int p9_socket_open(struct p9_transport *trans, struct socket *csocket);
+static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd);
+static int p9_fd_read(struct p9_transport *trans, void *v, int len);
+static int p9_fd_write(struct p9_transport *trans, void *v, int len);
+static unsigned int p9_fd_poll(struct p9_transport *trans,
+ struct poll_table_struct *pt);
+static void p9_fd_close(struct p9_transport *trans);
+
+struct p9_transport *p9_trans_create_tcp(const char *addr, int port)
+{
+ int err;
+ struct p9_transport *trans;
+ struct socket *csocket;
+ struct sockaddr_in sin_server;
+
+ csocket = NULL;
+ trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ sin_server.sin_family = AF_INET;
+ sin_server.sin_addr.s_addr = in_aton(addr);
+ sin_server.sin_port = htons(port);
+ sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket);
+
+ if (!csocket) {
+ P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n");
+ err = -EIO;
+ goto error;
+ }
+
+ err = csocket->ops->connect(csocket,
+ (struct sockaddr *)&sin_server,
+ sizeof(struct sockaddr_in), 0);
+ if (err < 0) {
+ P9_EPRINTK(KERN_ERR,
+ "p9_trans_tcp: problem connecting socket to %s\n",
+ addr);
+ goto error;
+ }
+
+ err = p9_socket_open(trans, csocket);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ if (csocket)
+ sock_release(csocket);
+
+ kfree(trans);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_trans_create_tcp);
+
+struct p9_transport *p9_trans_create_unix(const char *addr)
+{
+ int err;
+ struct socket *csocket;
+ struct sockaddr_un sun_server;
+ struct p9_transport *trans;
+
+ csocket = NULL;
+ trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ if (strlen(addr) > UNIX_PATH_MAX) {
+ P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n",
+ addr);
+ err = -ENAMETOOLONG;
+ goto error;
+ }
+
+ sun_server.sun_family = PF_UNIX;
+ strcpy(sun_server.sun_path, addr);
+ sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket);
+ err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server,
+ sizeof(struct sockaddr_un) - 1, 0);
+ if (err < 0) {
+ P9_EPRINTK(KERN_ERR,
+ "p9_trans_unix: problem connecting socket: %s: %d\n",
+ addr, err);
+ goto error;
+ }
+
+ err = p9_socket_open(trans, csocket);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ if (csocket)
+ sock_release(csocket);
+
+ kfree(trans);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_trans_create_unix);
+
+struct p9_transport *p9_trans_create_fd(int rfd, int wfd)
+{
+ int err;
+ struct p9_transport *trans;
+
+ if (rfd == ~0 || wfd == ~0) {
+ printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n");
+ return ERR_PTR(-ENOPROTOOPT);
+ }
+
+ trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL);
+ if (!trans)
+ return ERR_PTR(-ENOMEM);
+
+ trans->write = p9_fd_write;
+ trans->read = p9_fd_read;
+ trans->close = p9_fd_close;
+ trans->poll = p9_fd_poll;
+
+ err = p9_fd_open(trans, rfd, wfd);
+ if (err < 0)
+ goto error;
+
+ return trans;
+
+error:
+ kfree(trans);
+ return ERR_PTR(err);
+}
+EXPORT_SYMBOL(p9_trans_create_fd);
+
+static int p9_socket_open(struct p9_transport *trans, struct socket *csocket)
+{
+ int fd, ret;
+
+ csocket->sk->sk_allocation = GFP_NOIO;
+ fd = sock_map_fd(csocket);
+ if (fd < 0) {
+ P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n");
+ return fd;
+ }
+
+ ret = p9_fd_open(trans, fd, fd);
+ if (ret < 0) {
+ P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n");
+ sockfd_put(csocket);
+ return ret;
+ }
+
+ ((struct p9_trans_fd *)trans->priv)->rd->f_flags |= O_NONBLOCK;
+
+ return 0;
+}
+
+static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd)
+{
+ struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd),
+ GFP_KERNEL);
+ if (!ts)
+ return -ENOMEM;
+
+ ts->rd = fget(rfd);
+ ts->wr = fget(wfd);
+ if (!ts->rd || !ts->wr) {
+ if (ts->rd)
+ fput(ts->rd);
+ if (ts->wr)
+ fput(ts->wr);
+ kfree(ts);
+ return -EIO;
+ }
+
+ trans->priv = ts;
+ trans->status = Connected;
+
+ return 0;
+}
+
+/**
+ * p9_fd_read- read from a fd
+ * @v9ses: session information
+ * @v: buffer to receive data into
+ * @len: size of receive buffer
+ *
+ */
+static int p9_fd_read(struct p9_transport *trans, void *v, int len)
+{
+ int ret;
+ struct p9_trans_fd *ts = NULL;
+
+ if (trans && trans->status != Disconnected)
+ ts = trans->priv;
+
+ if (!ts)
+ return -EREMOTEIO;
+
+ if (!(ts->rd->f_flags & O_NONBLOCK))
+ P9_DPRINTK(P9_DEBUG_ERROR, "blocking read ...\n");
+
+ ret = kernel_read(ts->rd, ts->rd->f_pos, v, len);
+ if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
+ trans->status = Disconnected;
+ return ret;
+}
+
+/**
+ * p9_fd_write - write to a socket
+ * @v9ses: session information
+ * @v: buffer to send data from
+ * @len: size of send buffer
+ *
+ */
+static int p9_fd_write(struct p9_transport *trans, void *v, int len)
+{
+ int ret;
+ mm_segment_t oldfs;
+ struct p9_trans_fd *ts = NULL;
+
+ if (trans && trans->status != Disconnected)
+ ts = trans->priv;
+
+ if (!ts)
+ return -EREMOTEIO;
+
+ if (!(ts->wr->f_flags & O_NONBLOCK))
+ P9_DPRINTK(P9_DEBUG_ERROR, "blocking write ...\n");
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+ /* The cast to a user pointer is valid due to the set_fs() */
+ ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos);
+ set_fs(oldfs);
+
+ if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN)
+ trans->status = Disconnected;
+ return ret;
+}
+
+static unsigned int
+p9_fd_poll(struct p9_transport *trans, struct poll_table_struct *pt)
+{
+ int ret, n;
+ struct p9_trans_fd *ts = NULL;
+ mm_segment_t oldfs;
+
+ if (trans && trans->status == Connected)
+ ts = trans->priv;
+
+ if (!ts)
+ return -EREMOTEIO;
+
+ if (!ts->rd->f_op || !ts->rd->f_op->poll)
+ return -EIO;
+
+ if (!ts->wr->f_op || !ts->wr->f_op->poll)
+ return -EIO;
+
+ oldfs = get_fs();
+ set_fs(get_ds());
+
+ ret = ts->rd->f_op->poll(ts->rd, pt);
+ if (ret < 0)
+ goto end;
+
+ if (ts->rd != ts->wr) {
+ n = ts->wr->f_op->poll(ts->wr, pt);
+ if (n < 0) {
+ ret = n;
+ goto end;
+ }
+ ret = (ret & ~POLLOUT) | (n & ~POLLIN);
+ }
+
+end:
+ set_fs(oldfs);
+ return ret;
+}
+
+/**
+ * p9_sock_close - shutdown socket
+ * @trans: private socket structure
+ *
+ */
+static void p9_fd_close(struct p9_transport *trans)
+{
+ struct p9_trans_fd *ts;
+
+ if (!trans)
+ return;
+
+ ts = xchg(&trans->priv, NULL);
+
+ if (!ts)
+ return;
+
+ trans->status = Disconnected;
+ if (ts->rd)
+ fput(ts->rd);
+ if (ts->wr)
+ fput(ts->wr);
+ kfree(ts);
+}
+
--- /dev/null
+/*
+ * net/9p/util.c
+ *
+ * This file contains some helper functions
+ *
+ * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
+ * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
+ * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to:
+ * Free Software Foundation
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA 02111-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/parser.h>
+#include <linux/idr.h>
+#include <net/9p/9p.h>
+
+struct p9_idpool {
+ struct semaphore lock;
+ struct idr pool;
+};
+
+struct p9_idpool *p9_idpool_create(void)
+{
+ struct p9_idpool *p;
+
+ p = kmalloc(sizeof(struct p9_idpool), GFP_KERNEL);
+ if (!p)
+ return ERR_PTR(-ENOMEM);
+
+ init_MUTEX(&p->lock);
+ idr_init(&p->pool);
+
+ return p;
+}
+EXPORT_SYMBOL(p9_idpool_create);
+
+void p9_idpool_destroy(struct p9_idpool *p)
+{
+ idr_destroy(&p->pool);
+ kfree(p);
+}
+EXPORT_SYMBOL(p9_idpool_destroy);
+
+/**
+ * p9_idpool_get - allocate numeric id from pool
+ * @p - pool to allocate from
+ *
+ * XXX - This seems to be an awful generic function, should it be in idr.c with
+ * the lock included in struct idr?
+ */
+
+int p9_idpool_get(struct p9_idpool *p)
+{
+ int i = 0;
+ int error;
+
+retry:
+ if (idr_pre_get(&p->pool, GFP_KERNEL) == 0)
+ return 0;
+
+ if (down_interruptible(&p->lock) == -EINTR) {
+ P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n");
+ return -1;
+ }
+
+ /* no need to store exactly p, we just need something non-null */
+ error = idr_get_new(&p->pool, p, &i);
+ up(&p->lock);
+
+ if (error == -EAGAIN)
+ goto retry;
+ else if (error)
+ return -1;
+
+ return i;
+}
+EXPORT_SYMBOL(p9_idpool_get);
+
+/**
+ * p9_idpool_put - release numeric id from pool
+ * @p - pool to allocate from
+ *
+ * XXX - This seems to be an awful generic function, should it be in idr.c with
+ * the lock included in struct idr?
+ */
+
+void p9_idpool_put(int id, struct p9_idpool *p)
+{
+ if (down_interruptible(&p->lock) == -EINTR) {
+ P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n");
+ return;
+ }
+ idr_remove(&p->pool, id);
+ up(&p->lock);
+}
+EXPORT_SYMBOL(p9_idpool_put);
+
+/**
+ * p9_idpool_check - check if the specified id is available
+ * @id - id to check
+ * @p - pool
+ */
+int p9_idpool_check(int id, struct p9_idpool *p)
+{
+ return idr_find(&p->pool, id) != NULL;
+}
+EXPORT_SYMBOL(p9_idpool_check);
endmenu
source "net/rfkill/Kconfig"
+source "net/9p/Kconfig"
endif # if NET
endmenu # Networking
obj-$(CONFIG_NETLABEL) += netlabel/
obj-$(CONFIG_IUCV) += iucv/
obj-$(CONFIG_RFKILL) += rfkill/
+obj-$(CONFIG_NET_9P) += 9p/
ifeq ($(CONFIG_NET),y)
obj-$(CONFIG_SYSCTL) += sysctl_net.o
projects / linux-drm-fsl-dcu.git / commitdiff