fs/ncpfs/inode.c

   1 /*
   2  *  inode.c
   3  *
   4  *  Copyright (C) 1995, 1996 by Volker Lendecke
   5  *  Modified for big endian by J.F. Chadima and David S. Miller
   6  *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
   7  *  Modified 1998 Wolfram Pienkoss for NLS
   8  *  Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
   9  *
  10  */
  11
  12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  13
  14 #include <linux/module.h>
  15
  16 #include <asm/uaccess.h>
  17 #include <asm/byteorder.h>
  18
  19 #include <linux/time.h>
  20 #include <linux/kernel.h>
  21 #include <linux/mm.h>
  22 #include <linux/string.h>
  23 #include <linux/stat.h>
  24 #include <linux/errno.h>
  25 #include <linux/file.h>
  26 #include <linux/fcntl.h>
  27 #include <linux/slab.h>
  28 #include <linux/vmalloc.h>
  29 #include <linux/init.h>
  30 #include <linux/vfs.h>
  31 #include <linux/mount.h>
  32 #include <linux/seq_file.h>
  33 #include <linux/namei.h>
  34
  35 #include <net/sock.h>
  36
  37 #include "ncp_fs.h"
  38 #include "getopt.h"
  39
  40 #define NCP_DEFAULT_FILE_MODE 0600
  41 #define NCP_DEFAULT_DIR_MODE 0700
  42 #define NCP_DEFAULT_TIME_OUT 10
  43 #define NCP_DEFAULT_RETRY_COUNT 20
  44
  45 static void ncp_evict_inode(struct inode *);
  46 static void ncp_put_super(struct super_block *);
  47 static int  ncp_statfs(struct dentry *, struct kstatfs *);
  48 static int  ncp_show_options(struct seq_file *, struct dentry *);
  49
  50 static struct kmem_cache * ncp_inode_cachep;
  51
  52 static struct inode *ncp_alloc_inode(struct super_block *sb)
  53 {
  54         struct ncp_inode_info *ei;
  55         ei = (struct ncp_inode_info *)kmem_cache_alloc(ncp_inode_cachep, GFP_KERNEL);
  56         if (!ei)
  57                 return NULL;
  58         return &ei->vfs_inode;
  59 }
  60
  61 static void ncp_i_callback(struct rcu_head *head)
  62 {
  63         struct inode *inode = container_of(head, struct inode, i_rcu);
  64         kmem_cache_free(ncp_inode_cachep, NCP_FINFO(inode));
  65 }
  66
  67 static void ncp_destroy_inode(struct inode *inode)
  68 {
  69         call_rcu(&inode->i_rcu, ncp_i_callback);
  70 }
  71
  72 static void init_once(void *foo)
  73 {
  74         struct ncp_inode_info *ei = (struct ncp_inode_info *) foo;
  75
  76         mutex_init(&ei->open_mutex);
  77         inode_init_once(&ei->vfs_inode);
  78 }
  79
  80 static int init_inodecache(void)
  81 {
  82         ncp_inode_cachep = kmem_cache_create("ncp_inode_cache",
  83                                              sizeof(struct ncp_inode_info),
  84                                              0, (SLAB_RECLAIM_ACCOUNT|
  85                                                 SLAB_MEM_SPREAD),
  86                                              init_once);
  87         if (ncp_inode_cachep == NULL)
  88                 return -ENOMEM;
  89         return 0;
  90 }
  91
  92 static void destroy_inodecache(void)
  93 {
  94         /*
  95          * Make sure all delayed rcu free inodes are flushed before we
  96          * destroy cache.
  97          */
  98         rcu_barrier();
  99         kmem_cache_destroy(ncp_inode_cachep);
 100 }
 101
 102 static int ncp_remount(struct super_block *sb, int *flags, char* data)
 103 {
 104         sync_filesystem(sb);
 105         *flags |= MS_NODIRATIME;
 106         return 0;
 107 }
 108
 109 static const struct super_operations ncp_sops =
 110 {
 111         .alloc_inode    = ncp_alloc_inode,
 112         .destroy_inode  = ncp_destroy_inode,
 113         .drop_inode     = generic_delete_inode,
 114         .evict_inode    = ncp_evict_inode,
 115         .put_super      = ncp_put_super,
 116         .statfs         = ncp_statfs,
 117         .remount_fs     = ncp_remount,
 118         .show_options   = ncp_show_options,
 119 };
 120
 121 /*
 122  * Fill in the ncpfs-specific information in the inode.
 123  */
 124 static void ncp_update_dirent(struct inode *inode, struct ncp_entry_info *nwinfo)
 125 {
 126         NCP_FINFO(inode)->DosDirNum = nwinfo->i.DosDirNum;
 127         NCP_FINFO(inode)->dirEntNum = nwinfo->i.dirEntNum;
 128         NCP_FINFO(inode)->volNumber = nwinfo->volume;
 129 }
 130
 131 void ncp_update_inode(struct inode *inode, struct ncp_entry_info *nwinfo)
 132 {
 133         ncp_update_dirent(inode, nwinfo);
 134         NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
 135         NCP_FINFO(inode)->access = nwinfo->access;
 136         memcpy(NCP_FINFO(inode)->file_handle, nwinfo->file_handle,
 137                         sizeof(nwinfo->file_handle));
 138         ncp_dbg(1, "updated %s, volnum=%d, dirent=%u\n",
 139                 nwinfo->i.entryName, NCP_FINFO(inode)->volNumber,
 140                 NCP_FINFO(inode)->dirEntNum);
 141 }
 142
 143 static void ncp_update_dates(struct inode *inode, struct nw_info_struct *nwi)
 144 {
 145         /* NFS namespace mode overrides others if it's set. */
 146         ncp_dbg(1, "(%s) nfs.mode=0%o\n", nwi->entryName, nwi->nfs.mode);
 147         if (nwi->nfs.mode) {
 148                 /* XXX Security? */
 149                 inode->i_mode = nwi->nfs.mode;
 150         }
 151
 152         inode->i_blocks = (i_size_read(inode) + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT;
 153
 154         inode->i_mtime.tv_sec = ncp_date_dos2unix(nwi->modifyTime, nwi->modifyDate);
 155         inode->i_ctime.tv_sec = ncp_date_dos2unix(nwi->creationTime, nwi->creationDate);
 156         inode->i_atime.tv_sec = ncp_date_dos2unix(0, nwi->lastAccessDate);
 157         inode->i_atime.tv_nsec = 0;
 158         inode->i_mtime.tv_nsec = 0;
 159         inode->i_ctime.tv_nsec = 0;
 160 }
 161
 162 static void ncp_update_attrs(struct inode *inode, struct ncp_entry_info *nwinfo)
 163 {
 164         struct nw_info_struct *nwi = &nwinfo->i;
 165         struct ncp_server *server = NCP_SERVER(inode);
 166
 167         if (nwi->attributes & aDIR) {
 168                 inode->i_mode = server->m.dir_mode;
 169                 /* for directories dataStreamSize seems to be some
 170                    Object ID ??? */
 171                 i_size_write(inode, NCP_BLOCK_SIZE);
 172         } else {
 173                 u32 size;
 174
 175                 inode->i_mode = server->m.file_mode;
 176                 size = le32_to_cpu(nwi->dataStreamSize);
 177                 i_size_write(inode, size);
 178 #ifdef CONFIG_NCPFS_EXTRAS
 179                 if ((server->m.flags & (NCP_MOUNT_EXTRAS|NCP_MOUNT_SYMLINKS))
 180                  && (nwi->attributes & aSHARED)) {
 181                         switch (nwi->attributes & (aHIDDEN|aSYSTEM)) {
 182                                 case aHIDDEN:
 183                                         if (server->m.flags & NCP_MOUNT_SYMLINKS) {
 184                                                 if (/* (size >= NCP_MIN_SYMLINK_SIZE)
 185                                                  && */ (size <= NCP_MAX_SYMLINK_SIZE)) {
 186                                                         inode->i_mode = (inode->i_mode & ~S_IFMT) | S_IFLNK;
 187                                                         NCP_FINFO(inode)->flags |= NCPI_KLUDGE_SYMLINK;
 188                                                         break;
 189                                                 }
 190                                         }
 191                                         /* FALLTHROUGH */
 192                                 case 0:
 193                                         if (server->m.flags & NCP_MOUNT_EXTRAS)
 194                                                 inode->i_mode |= S_IRUGO;
 195                                         break;
 196                                 case aSYSTEM:
 197                                         if (server->m.flags & NCP_MOUNT_EXTRAS)
 198                                                 inode->i_mode |= (inode->i_mode >> 2) & S_IXUGO;
 199                                         break;
 200                                 /* case aSYSTEM|aHIDDEN: */
 201                                 default:
 202                                         /* reserved combination */
 203                                         break;
 204                         }
 205                 }
 206 #endif
 207         }
 208         if (nwi->attributes & aRONLY) inode->i_mode &= ~S_IWUGO;
 209 }
 210
 211 void ncp_update_inode2(struct inode* inode, struct ncp_entry_info *nwinfo)
 212 {
 213         NCP_FINFO(inode)->flags = 0;
 214         if (!atomic_read(&NCP_FINFO(inode)->opened)) {
 215                 NCP_FINFO(inode)->nwattr = nwinfo->i.attributes;
 216                 ncp_update_attrs(inode, nwinfo);
 217         }
 218
 219         ncp_update_dates(inode, &nwinfo->i);
 220         ncp_update_dirent(inode, nwinfo);
 221 }
 222
 223 /*
 224  * Fill in the inode based on the ncp_entry_info structure.  Used only for brand new inodes.
 225  */
 226 static void ncp_set_attr(struct inode *inode, struct ncp_entry_info *nwinfo)
 227 {
 228         struct ncp_server *server = NCP_SERVER(inode);
 229
 230         NCP_FINFO(inode)->flags = 0;
 231
 232         ncp_update_attrs(inode, nwinfo);
 233
 234         ncp_dbg(2, "inode->i_mode = %u\n", inode->i_mode);
 235
 236         set_nlink(inode, 1);
 237         inode->i_uid = server->m.uid;
 238         inode->i_gid = server->m.gid;
 239
 240         ncp_update_dates(inode, &nwinfo->i);
 241         ncp_update_inode(inode, nwinfo);
 242 }
 243
 244 #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
 245 static const struct inode_operations ncp_symlink_inode_operations = {
 246         .readlink       = generic_readlink,
 247         .follow_link    = page_follow_link_light,
 248         .put_link       = page_put_link,
 249         .setattr        = ncp_notify_change,
 250 };
 251 #endif
 252
 253 /*
 254  * Get a new inode.
 255  */
 256 struct inode *
 257 ncp_iget(struct super_block *sb, struct ncp_entry_info *info)
 258 {
 259         struct inode *inode;
 260
 261         if (info == NULL) {
 262                 pr_err("%s: info is NULL\n", __func__);
 263                 return NULL;
 264         }
 265
 266         inode = new_inode(sb);
 267         if (inode) {
 268                 atomic_set(&NCP_FINFO(inode)->opened, info->opened);
 269
 270                 inode->i_mapping->backing_dev_info = sb->s_bdi;
 271                 inode->i_ino = info->ino;
 272                 ncp_set_attr(inode, info);
 273                 if (S_ISREG(inode->i_mode)) {
 274                         inode->i_op = &ncp_file_inode_operations;
 275                         inode->i_fop = &ncp_file_operations;
 276                 } else if (S_ISDIR(inode->i_mode)) {
 277                         inode->i_op = &ncp_dir_inode_operations;
 278                         inode->i_fop = &ncp_dir_operations;
 279 #ifdef CONFIG_NCPFS_NFS_NS
 280                 } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
 281                         init_special_inode(inode, inode->i_mode,
 282                                 new_decode_dev(info->i.nfs.rdev));
 283 #endif
 284 #if defined(CONFIG_NCPFS_EXTRAS) || defined(CONFIG_NCPFS_NFS_NS)
 285                 } else if (S_ISLNK(inode->i_mode)) {
 286                         inode->i_op = &ncp_symlink_inode_operations;
 287                         inode->i_data.a_ops = &ncp_symlink_aops;
 288 #endif
 289                 } else {
 290                         make_bad_inode(inode);
 291                 }
 292                 insert_inode_hash(inode);
 293         } else
 294                 pr_err("%s: iget failed!\n", __func__);
 295         return inode;
 296 }
 297
 298 static void
 299 ncp_evict_inode(struct inode *inode)
 300 {
 301         truncate_inode_pages_final(&inode->i_data);
 302         clear_inode(inode);
 303
 304         if (S_ISDIR(inode->i_mode)) {
 305                 ncp_dbg(2, "put directory %ld\n", inode->i_ino);
 306         }
 307
 308         if (ncp_make_closed(inode) != 0) {
 309                 /* We can't do anything but complain. */
 310                 pr_err("%s: could not close\n", __func__);
 311         }
 312 }
 313
 314 static void ncp_stop_tasks(struct ncp_server *server) {
 315         struct sock* sk = server->ncp_sock->sk;
 316
 317         lock_sock(sk);
 318         sk->sk_error_report = server->error_report;
 319         sk->sk_data_ready   = server->data_ready;
 320         sk->sk_write_space  = server->write_space;
 321         release_sock(sk);
 322         del_timer_sync(&server->timeout_tm);
 323
 324         flush_work(&server->rcv.tq);
 325         if (sk->sk_socket->type == SOCK_STREAM)
 326                 flush_work(&server->tx.tq);
 327         else
 328                 flush_work(&server->timeout_tq);
 329 }
 330
 331 static int  ncp_show_options(struct seq_file *seq, struct dentry *root)
 332 {
 333         struct ncp_server *server = NCP_SBP(root->d_sb);
 334         unsigned int tmp;
 335
 336         if (!uid_eq(server->m.uid, GLOBAL_ROOT_UID))
 337                 seq_printf(seq, ",uid=%u",
 338                            from_kuid_munged(&init_user_ns, server->m.uid));
 339         if (!gid_eq(server->m.gid, GLOBAL_ROOT_GID))
 340                 seq_printf(seq, ",gid=%u",
 341                            from_kgid_munged(&init_user_ns, server->m.gid));
 342         if (!uid_eq(server->m.mounted_uid, GLOBAL_ROOT_UID))
 343                 seq_printf(seq, ",owner=%u",
 344                            from_kuid_munged(&init_user_ns, server->m.mounted_uid));
 345         tmp = server->m.file_mode & S_IALLUGO;
 346         if (tmp != NCP_DEFAULT_FILE_MODE)
 347                 seq_printf(seq, ",mode=0%o", tmp);
 348         tmp = server->m.dir_mode & S_IALLUGO;
 349         if (tmp != NCP_DEFAULT_DIR_MODE)
 350                 seq_printf(seq, ",dirmode=0%o", tmp);
 351         if (server->m.time_out != NCP_DEFAULT_TIME_OUT * HZ / 100) {
 352                 tmp = server->m.time_out * 100 / HZ;
 353                 seq_printf(seq, ",timeout=%u", tmp);
 354         }
 355         if (server->m.retry_count != NCP_DEFAULT_RETRY_COUNT)
 356                 seq_printf(seq, ",retry=%u", server->m.retry_count);
 357         if (server->m.flags != 0)
 358                 seq_printf(seq, ",flags=%lu", server->m.flags);
 359         if (server->m.wdog_pid != NULL)
 360                 seq_printf(seq, ",wdogpid=%u", pid_vnr(server->m.wdog_pid));
 361
 362         return 0;
 363 }
 364
 365 static const struct ncp_option ncp_opts[] = {
 366         { "uid",        OPT_INT,        'u' },
 367         { "gid",        OPT_INT,        'g' },
 368         { "owner",      OPT_INT,        'o' },
 369         { "mode",       OPT_INT,        'm' },
 370         { "dirmode",    OPT_INT,        'd' },
 371         { "timeout",    OPT_INT,        't' },
 372         { "retry",      OPT_INT,        'r' },
 373         { "flags",      OPT_INT,        'f' },
 374         { "wdogpid",    OPT_INT,        'w' },
 375         { "ncpfd",      OPT_INT,        'n' },
 376         { "infofd",     OPT_INT,        'i' },  /* v5 */
 377         { "version",    OPT_INT,        'v' },
 378         { NULL,         0,              0 } };
 379
 380 static int ncp_parse_options(struct ncp_mount_data_kernel *data, char *options) {
 381         int optval;
 382         char *optarg;
 383         unsigned long optint;
 384         int version = 0;
 385         int ret;
 386
 387         data->flags = 0;
 388         data->int_flags = 0;
 389         data->mounted_uid = GLOBAL_ROOT_UID;
 390         data->wdog_pid = NULL;
 391         data->ncp_fd = ~0;
 392         data->time_out = NCP_DEFAULT_TIME_OUT;
 393         data->retry_count = NCP_DEFAULT_RETRY_COUNT;
 394         data->uid = GLOBAL_ROOT_UID;
 395         data->gid = GLOBAL_ROOT_GID;
 396         data->file_mode = NCP_DEFAULT_FILE_MODE;
 397         data->dir_mode = NCP_DEFAULT_DIR_MODE;
 398         data->info_fd = -1;
 399         data->mounted_vol[0] = 0;
 400
 401         while ((optval = ncp_getopt("ncpfs", &options, ncp_opts, NULL, &optarg, &optint)) != 0) {
 402                 ret = optval;
 403                 if (ret < 0)
 404                         goto err;
 405                 switch (optval) {
 406                         case 'u':
 407                                 data->uid = make_kuid(current_user_ns(), optint);
 408                                 if (!uid_valid(data->uid)) {
 409                                         ret = -EINVAL;
 410                                         goto err;
 411                                 }
 412                                 break;
 413                         case 'g':
 414                                 data->gid = make_kgid(current_user_ns(), optint);
 415                                 if (!gid_valid(data->gid)) {
 416                                         ret = -EINVAL;
 417                                         goto err;
 418                                 }
 419                                 break;
 420                         case 'o':
 421                                 data->mounted_uid = make_kuid(current_user_ns(), optint);
 422                                 if (!uid_valid(data->mounted_uid)) {
 423                                         ret = -EINVAL;
 424                                         goto err;
 425                                 }
 426                                 break;
 427                         case 'm':
 428                                 data->file_mode = optint;
 429                                 break;
 430                         case 'd':
 431                                 data->dir_mode = optint;
 432                                 break;
 433                         case 't':
 434                                 data->time_out = optint;
 435                                 break;
 436                         case 'r':
 437                                 data->retry_count = optint;
 438                                 break;
 439                         case 'f':
 440                                 data->flags = optint;
 441                                 break;
 442                         case 'w':
 443                                 data->wdog_pid = find_get_pid(optint);
 444                                 break;
 445                         case 'n':
 446                                 data->ncp_fd = optint;
 447                                 break;
 448                         case 'i':
 449                                 data->info_fd = optint;
 450                                 break;
 451                         case 'v':
 452                                 ret = -ECHRNG;
 453                                 if (optint < NCP_MOUNT_VERSION_V4)
 454                                         goto err;
 455                                 if (optint > NCP_MOUNT_VERSION_V5)
 456                                         goto err;
 457                                 version = optint;
 458                                 break;
 459
 460                 }
 461         }
 462         return 0;
 463 err:
 464         put_pid(data->wdog_pid);
 465         data->wdog_pid = NULL;
 466         return ret;
 467 }
 468
 469 static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
 470 {
 471         struct ncp_mount_data_kernel data;
 472         struct ncp_server *server;
 473         struct file *ncp_filp;
 474         struct inode *root_inode;
 475         struct inode *sock_inode;
 476         struct socket *sock;
 477         int error;
 478         int default_bufsize;
 479 #ifdef CONFIG_NCPFS_PACKET_SIGNING
 480         int options;
 481 #endif
 482         struct ncp_entry_info finfo;
 483
 484         memset(&data, 0, sizeof(data));
 485         server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
 486         if (!server)
 487                 return -ENOMEM;
 488         sb->s_fs_info = server;
 489
 490         error = -EFAULT;
 491         if (raw_data == NULL)
 492                 goto out;
 493         switch (*(int*)raw_data) {
 494                 case NCP_MOUNT_VERSION:
 495                         {
 496                                 struct ncp_mount_data* md = (struct ncp_mount_data*)raw_data;
 497
 498                                 data.flags = md->flags;
 499                                 data.int_flags = NCP_IMOUNT_LOGGEDIN_POSSIBLE;
 500                                 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
 501                                 data.wdog_pid = find_get_pid(md->wdog_pid);
 502                                 data.ncp_fd = md->ncp_fd;
 503                                 data.time_out = md->time_out;
 504                                 data.retry_count = md->retry_count;
 505                                 data.uid = make_kuid(current_user_ns(), md->uid);
 506                                 data.gid = make_kgid(current_user_ns(), md->gid);
 507                                 data.file_mode = md->file_mode;
 508                                 data.dir_mode = md->dir_mode;
 509                                 data.info_fd = -1;
 510                                 memcpy(data.mounted_vol, md->mounted_vol,
 511                                         NCP_VOLNAME_LEN+1);
 512                         }
 513                         break;
 514                 case NCP_MOUNT_VERSION_V4:
 515                         {
 516                                 struct ncp_mount_data_v4* md = (struct ncp_mount_data_v4*)raw_data;
 517
 518                                 data.flags = md->flags;
 519                                 data.mounted_uid = make_kuid(current_user_ns(), md->mounted_uid);
 520                                 data.wdog_pid = find_get_pid(md->wdog_pid);
 521                                 data.ncp_fd = md->ncp_fd;
 522                                 data.time_out = md->time_out;
 523                                 data.retry_count = md->retry_count;
 524                                 data.uid = make_kuid(current_user_ns(), md->uid);
 525                                 data.gid = make_kgid(current_user_ns(), md->gid);
 526                                 data.file_mode = md->file_mode;
 527                                 data.dir_mode = md->dir_mode;
 528                                 data.info_fd = -1;
 529                         }
 530                         break;
 531                 default:
 532                         error = -ECHRNG;
 533                         if (memcmp(raw_data, "vers", 4) == 0) {
 534                                 error = ncp_parse_options(&data, raw_data);
 535                         }
 536                         if (error)
 537                                 goto out;
 538                         break;
 539         }
 540         error = -EINVAL;
 541         if (!uid_valid(data.mounted_uid) || !uid_valid(data.uid) ||
 542             !gid_valid(data.gid))
 543                 goto out;
 544         error = -EBADF;
 545         ncp_filp = fget(data.ncp_fd);
 546         if (!ncp_filp)
 547                 goto out;
 548         error = -ENOTSOCK;
 549         sock_inode = file_inode(ncp_filp);
 550         if (!S_ISSOCK(sock_inode->i_mode))
 551                 goto out_fput;
 552         sock = SOCKET_I(sock_inode);
 553         if (!sock)
 554                 goto out_fput;
 555
 556         if (sock->type == SOCK_STREAM)
 557                 default_bufsize = 0xF000;
 558         else
 559                 default_bufsize = 1024;
 560
 561         sb->s_flags |= MS_NODIRATIME;   /* probably even noatime */
 562         sb->s_maxbytes = 0xFFFFFFFFU;
 563         sb->s_blocksize = 1024; /* Eh...  Is this correct? */
 564         sb->s_blocksize_bits = 10;
 565         sb->s_magic = NCP_SUPER_MAGIC;
 566         sb->s_op = &ncp_sops;
 567         sb->s_d_op = &ncp_dentry_operations;
 568         sb->s_bdi = &server->bdi;
 569
 570         server = NCP_SBP(sb);
 571         memset(server, 0, sizeof(*server));
 572
 573         error = bdi_setup_and_register(&server->bdi, "ncpfs", BDI_CAP_MAP_COPY);
 574         if (error)
 575                 goto out_fput;
 576
 577         server->ncp_filp = ncp_filp;
 578         server->ncp_sock = sock;
 579
 580         if (data.info_fd != -1) {
 581                 struct socket *info_sock;
 582
 583                 error = -EBADF;
 584                 server->info_filp = fget(data.info_fd);
 585                 if (!server->info_filp)
 586                         goto out_bdi;
 587                 error = -ENOTSOCK;
 588                 sock_inode = file_inode(server->info_filp);
 589                 if (!S_ISSOCK(sock_inode->i_mode))
 590                         goto out_fput2;
 591                 info_sock = SOCKET_I(sock_inode);
 592                 if (!info_sock)
 593                         goto out_fput2;
 594                 error = -EBADFD;
 595                 if (info_sock->type != SOCK_STREAM)
 596                         goto out_fput2;
 597                 server->info_sock = info_sock;
 598         }
 599
 600 /*      server->lock = 0;       */
 601         mutex_init(&server->mutex);
 602         server->packet = NULL;
 603 /*      server->buffer_size = 0;        */
 604 /*      server->conn_status = 0;        */
 605 /*      server->root_dentry = NULL;     */
 606 /*      server->root_setuped = 0;       */
 607         mutex_init(&server->root_setup_lock);
 608 #ifdef CONFIG_NCPFS_PACKET_SIGNING
 609 /*      server->sign_wanted = 0;        */
 610 /*      server->sign_active = 0;        */
 611 #endif
 612         init_rwsem(&server->auth_rwsem);
 613         server->auth.auth_type = NCP_AUTH_NONE;
 614 /*      server->auth.object_name_len = 0;       */
 615 /*      server->auth.object_name = NULL;        */
 616 /*      server->auth.object_type = 0;           */
 617 /*      server->priv.len = 0;                   */
 618 /*      server->priv.data = NULL;               */
 619
 620         server->m = data;
 621         /* Although anything producing this is buggy, it happens
 622            now because of PATH_MAX changes.. */
 623         if (server->m.time_out < 1) {
 624                 server->m.time_out = 10;
 625                 pr_info("You need to recompile your ncpfs utils..\n");
 626         }
 627         server->m.time_out = server->m.time_out * HZ / 100;
 628         server->m.file_mode = (server->m.file_mode & S_IRWXUGO) | S_IFREG;
 629         server->m.dir_mode = (server->m.dir_mode & S_IRWXUGO) | S_IFDIR;
 630
 631 #ifdef CONFIG_NCPFS_NLS
 632         /* load the default NLS charsets */
 633         server->nls_vol = load_nls_default();
 634         server->nls_io = load_nls_default();
 635 #endif /* CONFIG_NCPFS_NLS */
 636
 637         atomic_set(&server->dentry_ttl, 0);     /* no caching */
 638
 639         INIT_LIST_HEAD(&server->tx.requests);
 640         mutex_init(&server->rcv.creq_mutex);
 641         server->tx.creq         = NULL;
 642         server->rcv.creq        = NULL;
 643
 644         init_timer(&server->timeout_tm);
 645 #undef NCP_PACKET_SIZE
 646 #define NCP_PACKET_SIZE 131072
 647         error = -ENOMEM;
 648         server->packet_size = NCP_PACKET_SIZE;
 649         server->packet = vmalloc(NCP_PACKET_SIZE);
 650         if (server->packet == NULL)
 651                 goto out_nls;
 652         server->txbuf = vmalloc(NCP_PACKET_SIZE);
 653         if (server->txbuf == NULL)
 654                 goto out_packet;
 655         server->rxbuf = vmalloc(NCP_PACKET_SIZE);
 656         if (server->rxbuf == NULL)
 657                 goto out_txbuf;
 658
 659         lock_sock(sock->sk);
 660         server->data_ready      = sock->sk->sk_data_ready;
 661         server->write_space     = sock->sk->sk_write_space;
 662         server->error_report    = sock->sk->sk_error_report;
 663         sock->sk->sk_user_data  = server;
 664         sock->sk->sk_data_ready   = ncp_tcp_data_ready;
 665         sock->sk->sk_error_report = ncp_tcp_error_report;
 666         if (sock->type == SOCK_STREAM) {
 667                 server->rcv.ptr = (unsigned char*)&server->rcv.buf;
 668                 server->rcv.len = 10;
 669                 server->rcv.state = 0;
 670                 INIT_WORK(&server->rcv.tq, ncp_tcp_rcv_proc);
 671                 INIT_WORK(&server->tx.tq, ncp_tcp_tx_proc);
 672                 sock->sk->sk_write_space = ncp_tcp_write_space;
 673         } else {
 674                 INIT_WORK(&server->rcv.tq, ncpdgram_rcv_proc);
 675                 INIT_WORK(&server->timeout_tq, ncpdgram_timeout_proc);
 676                 server->timeout_tm.data = (unsigned long)server;
 677                 server->timeout_tm.function = ncpdgram_timeout_call;
 678         }
 679         release_sock(sock->sk);
 680
 681         ncp_lock_server(server);
 682         error = ncp_connect(server);
 683         ncp_unlock_server(server);
 684         if (error < 0)
 685                 goto out_rxbuf;
 686         ncp_dbg(1, "NCP_SBP(sb) = %p\n", NCP_SBP(sb));
 687
 688         error = -EMSGSIZE;      /* -EREMOTESIDEINCOMPATIBLE */
 689 #ifdef CONFIG_NCPFS_PACKET_SIGNING
 690         if (ncp_negotiate_size_and_options(server, default_bufsize,
 691                 NCP_DEFAULT_OPTIONS, &(server->buffer_size), &options) == 0)
 692         {
 693                 if (options != NCP_DEFAULT_OPTIONS)
 694                 {
 695                         if (ncp_negotiate_size_and_options(server,
 696                                 default_bufsize,
 697                                 options & 2,
 698                                 &(server->buffer_size), &options) != 0)
 699
 700                         {
 701                                 goto out_disconnect;
 702                         }
 703                 }
 704                 ncp_lock_server(server);
 705                 if (options & 2)
 706                         server->sign_wanted = 1;
 707                 ncp_unlock_server(server);
 708         }
 709         else
 710 #endif  /* CONFIG_NCPFS_PACKET_SIGNING */
 711         if (ncp_negotiate_buffersize(server, default_bufsize,
 712                                      &(server->buffer_size)) != 0)
 713                 goto out_disconnect;
 714         ncp_dbg(1, "bufsize = %d\n", server->buffer_size);
 715
 716         memset(&finfo, 0, sizeof(finfo));
 717         finfo.i.attributes      = aDIR;
 718         finfo.i.dataStreamSize  = 0;    /* ignored */
 719         finfo.i.dirEntNum       = 0;
 720         finfo.i.DosDirNum       = 0;
 721 #ifdef CONFIG_NCPFS_SMALLDOS
 722         finfo.i.NSCreator       = NW_NS_DOS;
 723 #endif
 724         finfo.volume            = NCP_NUMBER_OF_VOLUMES;
 725         /* set dates of mountpoint to Jan 1, 1986; 00:00 */
 726         finfo.i.creationTime    = finfo.i.modifyTime
 727                                 = cpu_to_le16(0x0000);
 728         finfo.i.creationDate    = finfo.i.modifyDate
 729                                 = finfo.i.lastAccessDate
 730                                 = cpu_to_le16(0x0C21);
 731         finfo.i.nameLen         = 0;
 732         finfo.i.entryName[0]    = '\0';
 733
 734         finfo.opened            = 0;
 735         finfo.ino               = 2;    /* tradition */
 736
 737         server->name_space[finfo.volume] = NW_NS_DOS;
 738
 739         error = -ENOMEM;
 740         root_inode = ncp_iget(sb, &finfo);
 741         if (!root_inode)
 742                 goto out_disconnect;
 743         ncp_dbg(1, "root vol=%d\n", NCP_FINFO(root_inode)->volNumber);
 744         sb->s_root = d_make_root(root_inode);
 745         if (!sb->s_root)
 746                 goto out_disconnect;
 747         return 0;
 748
 749 out_disconnect:
 750         ncp_lock_server(server);
 751         ncp_disconnect(server);
 752         ncp_unlock_server(server);
 753 out_rxbuf:
 754         ncp_stop_tasks(server);
 755         vfree(server->rxbuf);
 756 out_txbuf:
 757         vfree(server->txbuf);
 758 out_packet:
 759         vfree(server->packet);
 760 out_nls:
 761 #ifdef CONFIG_NCPFS_NLS
 762         unload_nls(server->nls_io);
 763         unload_nls(server->nls_vol);
 764 #endif
 765         mutex_destroy(&server->rcv.creq_mutex);
 766         mutex_destroy(&server->root_setup_lock);
 767         mutex_destroy(&server->mutex);
 768 out_fput2:
 769         if (server->info_filp)
 770                 fput(server->info_filp);
 771 out_bdi:
 772         bdi_destroy(&server->bdi);
 773 out_fput:
 774         /* 23/12/1998 Marcin Dalecki <dalecki@cs.net.pl>:
 775          *
 776          * The previously used put_filp(ncp_filp); was bogus, since
 777          * it doesn't perform proper unlocking.
 778          */
 779         fput(ncp_filp);
 780 out:
 781         put_pid(data.wdog_pid);
 782         sb->s_fs_info = NULL;
 783         kfree(server);
 784         return error;
 785 }
 786
 787 static void delayed_free(struct rcu_head *p)
 788 {
 789         struct ncp_server *server = container_of(p, struct ncp_server, rcu);
 790 #ifdef CONFIG_NCPFS_NLS
 791         /* unload the NLS charsets */
 792         unload_nls(server->nls_vol);
 793         unload_nls(server->nls_io);
 794 #endif /* CONFIG_NCPFS_NLS */
 795         kfree(server);
 796 }
 797
 798 static void ncp_put_super(struct super_block *sb)
 799 {
 800         struct ncp_server *server = NCP_SBP(sb);
 801
 802         ncp_lock_server(server);
 803         ncp_disconnect(server);
 804         ncp_unlock_server(server);
 805
 806         ncp_stop_tasks(server);
 807
 808         mutex_destroy(&server->rcv.creq_mutex);
 809         mutex_destroy(&server->root_setup_lock);
 810         mutex_destroy(&server->mutex);
 811
 812         if (server->info_filp)
 813                 fput(server->info_filp);
 814         fput(server->ncp_filp);
 815         kill_pid(server->m.wdog_pid, SIGTERM, 1);
 816         put_pid(server->m.wdog_pid);
 817
 818         bdi_destroy(&server->bdi);
 819         kfree(server->priv.data);
 820         kfree(server->auth.object_name);
 821         vfree(server->rxbuf);
 822         vfree(server->txbuf);
 823         vfree(server->packet);
 824         call_rcu(&server->rcu, delayed_free);
 825 }
 826
 827 static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf)
 828 {
 829         struct dentry* d;
 830         struct inode* i;
 831         struct ncp_inode_info* ni;
 832         struct ncp_server* s;
 833         struct ncp_volume_info vi;
 834         struct super_block *sb = dentry->d_sb;
 835         int err;
 836         __u8 dh;
 837
 838         d = sb->s_root;
 839         if (!d) {
 840                 goto dflt;
 841         }
 842         i = d->d_inode;
 843         if (!i) {
 844                 goto dflt;
 845         }
 846         ni = NCP_FINFO(i);
 847         if (!ni) {
 848                 goto dflt;
 849         }
 850         s = NCP_SBP(sb);
 851         if (!s) {
 852                 goto dflt;
 853         }
 854         if (!s->m.mounted_vol[0]) {
 855                 goto dflt;
 856         }
 857
 858         err = ncp_dirhandle_alloc(s, ni->volNumber, ni->DosDirNum, &dh);
 859         if (err) {
 860                 goto dflt;
 861         }
 862         err = ncp_get_directory_info(s, dh, &vi);
 863         ncp_dirhandle_free(s, dh);
 864         if (err) {
 865                 goto dflt;
 866         }
 867         buf->f_type = NCP_SUPER_MAGIC;
 868         buf->f_bsize = vi.sectors_per_block * 512;
 869         buf->f_blocks = vi.total_blocks;
 870         buf->f_bfree = vi.free_blocks;
 871         buf->f_bavail = vi.free_blocks;
 872         buf->f_files = vi.total_dir_entries;
 873         buf->f_ffree = vi.available_dir_entries;
 874         buf->f_namelen = 12;
 875         return 0;
 876
 877         /* We cannot say how much disk space is left on a mounted
 878            NetWare Server, because free space is distributed over
 879            volumes, and the current user might have disk quotas. So
 880            free space is not that simple to determine. Our decision
 881            here is to err conservatively. */
 882
 883 dflt:;
 884         buf->f_type = NCP_SUPER_MAGIC;
 885         buf->f_bsize = NCP_BLOCK_SIZE;
 886         buf->f_blocks = 0;
 887         buf->f_bfree = 0;
 888         buf->f_bavail = 0;
 889         buf->f_namelen = 12;
 890         return 0;
 891 }
 892
 893 int ncp_notify_change(struct dentry *dentry, struct iattr *attr)
 894 {
 895         struct inode *inode = dentry->d_inode;
 896         int result = 0;
 897         __le32 info_mask;
 898         struct nw_modify_dos_info info;
 899         struct ncp_server *server;
 900
 901         result = -EIO;
 902
 903         server = NCP_SERVER(inode);
 904         if (!server)    /* How this could happen? */
 905                 goto out;
 906
 907         result = -EPERM;
 908         if (IS_DEADDIR(dentry->d_inode))
 909                 goto out;
 910
 911         /* ageing the dentry to force validation */
 912         ncp_age_dentry(server, dentry);
 913
 914         result = inode_change_ok(inode, attr);
 915         if (result < 0)
 916                 goto out;
 917
 918         result = -EPERM;
 919         if ((attr->ia_valid & ATTR_UID) && !uid_eq(attr->ia_uid, server->m.uid))
 920                 goto out;
 921
 922         if ((attr->ia_valid & ATTR_GID) && !gid_eq(attr->ia_gid, server->m.gid))
 923                 goto out;
 924
 925         if (((attr->ia_valid & ATTR_MODE) &&
 926              (attr->ia_mode &
 927               ~(S_IFREG | S_IFDIR | S_IRWXUGO))))
 928                 goto out;
 929
 930         info_mask = 0;
 931         memset(&info, 0, sizeof(info));
 932
 933 #if 1
 934         if ((attr->ia_valid & ATTR_MODE) != 0)
 935         {
 936                 umode_t newmode = attr->ia_mode;
 937
 938                 info_mask |= DM_ATTRIBUTES;
 939
 940                 if (S_ISDIR(inode->i_mode)) {
 941                         newmode &= server->m.dir_mode;
 942                 } else {
 943 #ifdef CONFIG_NCPFS_EXTRAS
 944                         if (server->m.flags & NCP_MOUNT_EXTRAS) {
 945                                 /* any non-default execute bit set */
 946                                 if (newmode & ~server->m.file_mode & S_IXUGO)
 947                                         info.attributes |= aSHARED | aSYSTEM;
 948                                 /* read for group/world and not in default file_mode */
 949                                 else if (newmode & ~server->m.file_mode & S_IRUGO)
 950                                         info.attributes |= aSHARED;
 951                         } else
 952 #endif
 953                                 newmode &= server->m.file_mode;
 954                 }
 955                 if (newmode & S_IWUGO)
 956                         info.attributes &= ~(aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
 957                 else
 958                         info.attributes |=  (aRONLY|aRENAMEINHIBIT|aDELETEINHIBIT);
 959
 960 #ifdef CONFIG_NCPFS_NFS_NS
 961                 if (ncp_is_nfs_extras(server, NCP_FINFO(inode)->volNumber)) {
 962                         result = ncp_modify_nfs_info(server,
 963                                                      NCP_FINFO(inode)->volNumber,
 964                                                      NCP_FINFO(inode)->dirEntNum,
 965                                                      attr->ia_mode, 0);
 966                         if (result != 0)
 967                                 goto out;
 968                         info.attributes &= ~(aSHARED | aSYSTEM);
 969                         {
 970                                 /* mark partial success */
 971                                 struct iattr tmpattr;
 972
 973                                 tmpattr.ia_valid = ATTR_MODE;
 974                                 tmpattr.ia_mode = attr->ia_mode;
 975
 976                                 setattr_copy(inode, &tmpattr);
 977                                 mark_inode_dirty(inode);
 978                         }
 979                 }
 980 #endif
 981         }
 982 #endif
 983
 984         /* Do SIZE before attributes, otherwise mtime together with size does not work...
 985          */
 986         if ((attr->ia_valid & ATTR_SIZE) != 0) {
 987                 int written;
 988
 989                 ncp_dbg(1, "trying to change size to %llu\n", attr->ia_size);
 990
 991                 if ((result = ncp_make_open(inode, O_WRONLY)) < 0) {
 992                         result = -EACCES;
 993                         goto out;
 994                 }
 995                 ncp_write_kernel(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle,
 996                           attr->ia_size, 0, "", &written);
 997
 998                 /* According to ndir, the changes only take effect after
 999                    closing the file */
1000                 ncp_inode_close(inode);
1001                 result = ncp_make_closed(inode);
1002                 if (result)
1003                         goto out;
1004
1005                 if (attr->ia_size != i_size_read(inode)) {
1006                         truncate_setsize(inode, attr->ia_size);
1007                         mark_inode_dirty(inode);
1008                 }
1009         }
1010         if ((attr->ia_valid & ATTR_CTIME) != 0) {
1011                 info_mask |= (DM_CREATE_TIME | DM_CREATE_DATE);
1012                 ncp_date_unix2dos(attr->ia_ctime.tv_sec,
1013                              &info.creationTime, &info.creationDate);
1014         }
1015         if ((attr->ia_valid & ATTR_MTIME) != 0) {
1016                 info_mask |= (DM_MODIFY_TIME | DM_MODIFY_DATE);
1017                 ncp_date_unix2dos(attr->ia_mtime.tv_sec,
1018                                   &info.modifyTime, &info.modifyDate);
1019         }
1020         if ((attr->ia_valid & ATTR_ATIME) != 0) {
1021                 __le16 dummy;
1022                 info_mask |= (DM_LAST_ACCESS_DATE);
1023                 ncp_date_unix2dos(attr->ia_atime.tv_sec,
1024                                   &dummy, &info.lastAccessDate);
1025         }
1026         if (info_mask != 0) {
1027                 result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode),
1028                                       inode, info_mask, &info);
1029                 if (result != 0) {
1030                         if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) {
1031                                 /* NetWare seems not to allow this. I
1032                                    do not know why. So, just tell the
1033                                    user everything went fine. This is
1034                                    a terrible hack, but I do not know
1035                                    how to do this correctly. */
1036                                 result = 0;
1037                         } else
1038                                 goto out;
1039                 }
1040 #ifdef CONFIG_NCPFS_STRONG
1041                 if ((!result) && (info_mask & DM_ATTRIBUTES))
1042                         NCP_FINFO(inode)->nwattr = info.attributes;
1043 #endif
1044         }
1045         if (result)
1046                 goto out;
1047
1048         setattr_copy(inode, attr);
1049         mark_inode_dirty(inode);
1050
1051 out:
1052         if (result > 0)
1053                 result = -EACCES;
1054         return result;
1055 }
1056
1057 static struct dentry *ncp_mount(struct file_system_type *fs_type,
1058         int flags, const char *dev_name, void *data)
1059 {
1060         return mount_nodev(fs_type, flags, data, ncp_fill_super);
1061 }
1062
1063 static struct file_system_type ncp_fs_type = {
1064         .owner          = THIS_MODULE,
1065         .name           = "ncpfs",
1066         .mount          = ncp_mount,
1067         .kill_sb        = kill_anon_super,
1068         .fs_flags       = FS_BINARY_MOUNTDATA,
1069 };
1070 MODULE_ALIAS_FS("ncpfs");
1071
1072 static int __init init_ncp_fs(void)
1073 {
1074         int err;
1075         ncp_dbg(1, "called\n");
1076
1077         err = init_inodecache();
1078         if (err)
1079                 goto out1;
1080         err = register_filesystem(&ncp_fs_type);
1081         if (err)
1082                 goto out;
1083         return 0;
1084 out:
1085         destroy_inodecache();
1086 out1:
1087         return err;
1088 }
1089
1090 static void __exit exit_ncp_fs(void)
1091 {
1092         ncp_dbg(1, "called\n");
1093         unregister_filesystem(&ncp_fs_type);
1094         destroy_inodecache();
1095 }
1096
1097 module_init(init_ncp_fs)
1098 module_exit(exit_ncp_fs)
1099 MODULE_LICENSE("GPL");