/*
* XDR functions for basic NFS types
*/
-u32 *
-xdr_encode_netobj(u32 *p, const struct xdr_netobj *obj)
+__be32 *
+xdr_encode_netobj(__be32 *p, const struct xdr_netobj *obj)
{
unsigned int quadlen = XDR_QUADLEN(obj->len);
return p + XDR_QUADLEN(obj->len);
}
-u32 *
-xdr_decode_netobj(u32 *p, struct xdr_netobj *obj)
+__be32 *
+xdr_decode_netobj(__be32 *p, struct xdr_netobj *obj)
{
unsigned int len;
* Returns the updated current XDR buffer position
*
*/
-u32 *xdr_encode_opaque_fixed(u32 *p, const void *ptr, unsigned int nbytes)
+__be32 *xdr_encode_opaque_fixed(__be32 *p, const void *ptr, unsigned int nbytes)
{
if (likely(nbytes != 0)) {
unsigned int quadlen = XDR_QUADLEN(nbytes);
*
* Returns the updated current XDR buffer position
*/
-u32 *xdr_encode_opaque(u32 *p, const void *ptr, unsigned int nbytes)
+__be32 *xdr_encode_opaque(__be32 *p, const void *ptr, unsigned int nbytes)
{
*p++ = htonl(nbytes);
return xdr_encode_opaque_fixed(p, ptr, nbytes);
}
EXPORT_SYMBOL(xdr_encode_opaque);
-u32 *
-xdr_encode_string(u32 *p, const char *string)
+__be32 *
+xdr_encode_string(__be32 *p, const char *string)
{
return xdr_encode_array(p, string, strlen(string));
}
-u32 *
-xdr_decode_string_inplace(u32 *p, char **sp, int *lenp, int maxlen)
+__be32 *
+xdr_decode_string_inplace(__be32 *p, char **sp, int *lenp, int maxlen)
{
unsigned int len;
do {
/* Are any pointers crossing a page boundary? */
if (pgto_base == 0) {
- flush_dcache_page(*pgto);
pgto_base = PAGE_CACHE_SIZE;
pgto--;
}
vto = kmap_atomic(*pgto, KM_USER0);
vfrom = kmap_atomic(*pgfrom, KM_USER1);
memmove(vto + pgto_base, vfrom + pgfrom_base, copy);
+ flush_dcache_page(*pgto);
kunmap_atomic(vfrom, KM_USER1);
kunmap_atomic(vto, KM_USER0);
} while ((len -= copy) != 0);
- flush_dcache_page(*pgto);
}
/*
* @buf: xdr_buf
* @len: bytes to remove from buf->head[0]
*
- * Shrinks XDR buffer's header kvec buf->head[0] by
+ * Shrinks XDR buffer's header kvec buf->head[0] by
* 'len' bytes. The extra data is not lost, but is instead
* moved into the inlined pages and/or the tail.
*/
* @buf: xdr_buf
* @len: bytes to remove from buf->pages
*
- * Shrinks XDR buffer's page array buf->pages by
+ * Shrinks XDR buffer's page array buf->pages by
* 'len' bytes. The extra data is not lost, but is instead
* moved into the tail.
*/
* of the buffer length, and takes care of adjusting the kvec
* length for us.
*/
-void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p)
+void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p)
{
struct kvec *iov = buf->head;
int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;
BUG_ON(scratch_len < 0);
xdr->buf = buf;
xdr->iov = iov;
- xdr->p = (uint32_t *)((char *)iov->iov_base + iov->iov_len);
- xdr->end = (uint32_t *)((char *)iov->iov_base + scratch_len);
+ xdr->p = (__be32 *)((char *)iov->iov_base + iov->iov_len);
+ xdr->end = (__be32 *)((char *)iov->iov_base + scratch_len);
BUG_ON(iov->iov_len > scratch_len);
if (p != xdr->p && p != NULL) {
* bytes of data. If so, update the total xdr_buf length, and
* adjust the length of the current kvec.
*/
-uint32_t * xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes)
+__be32 * xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes)
{
- uint32_t *p = xdr->p;
- uint32_t *q;
+ __be32 *p = xdr->p;
+ __be32 *q;
/* align nbytes on the next 32-bit boundary */
nbytes += 3;
* @buf: pointer to XDR buffer from which to decode data
* @p: current pointer inside XDR buffer
*/
-void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p)
+void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p)
{
struct kvec *iov = buf->head;
unsigned int len = iov->iov_len;
xdr->buf = buf;
xdr->iov = iov;
xdr->p = p;
- xdr->end = (uint32_t *)((char *)iov->iov_base + len);
+ xdr->end = (__be32 *)((char *)iov->iov_base + len);
}
EXPORT_SYMBOL(xdr_init_decode);
* If so return the current pointer, then update the current
* pointer position.
*/
-uint32_t * xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
+__be32 * xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
{
- uint32_t *p = xdr->p;
- uint32_t *q = p + XDR_QUADLEN(nbytes);
+ __be32 *p = xdr->p;
+ __be32 *q = p + XDR_QUADLEN(nbytes);
if (unlikely(q > xdr->end || q < p))
return NULL;
* Position current pointer at beginning of tail, and
* set remaining message length.
*/
- xdr->p = (uint32_t *)((char *)iov->iov_base + padding);
- xdr->end = (uint32_t *)((char *)iov->iov_base + end);
+ xdr->p = (__be32 *)((char *)iov->iov_base + padding);
+ xdr->end = (__be32 *)((char *)iov->iov_base + end);
}
EXPORT_SYMBOL(xdr_read_pages);
*/
if (len > PAGE_CACHE_SIZE - xdr->buf->page_base)
len = PAGE_CACHE_SIZE - xdr->buf->page_base;
- xdr->p = (uint32_t *)(kaddr + xdr->buf->page_base);
- xdr->end = (uint32_t *)((char *)xdr->p + len);
+ xdr->p = (__be32 *)(kaddr + xdr->buf->page_base);
+ xdr->end = (__be32 *)((char *)xdr->p + len);
}
EXPORT_SYMBOL(xdr_enter_page);
buf->buflen = buf->len = iov->iov_len;
}
-/* Sets subiov to the intersection of iov with the buffer of length len
- * starting base bytes after iov. Indicates empty intersection by setting
- * length of subiov to zero. Decrements len by length of subiov, sets base
- * to zero (or decrements it by length of iov if subiov is empty). */
-static void
-iov_subsegment(struct kvec *iov, struct kvec *subiov, int *base, int *len)
-{
- if (*base > iov->iov_len) {
- subiov->iov_base = NULL;
- subiov->iov_len = 0;
- *base -= iov->iov_len;
- } else {
- subiov->iov_base = iov->iov_base + *base;
- subiov->iov_len = min(*len, (int)iov->iov_len - *base);
- *base = 0;
- }
- *len -= subiov->iov_len;
-}
-
/* Sets subbuf to the portion of buf of length len beginning base bytes
* from the start of buf. Returns -1 if base of length are out of bounds. */
int
xdr_buf_subsegment(struct xdr_buf *buf, struct xdr_buf *subbuf,
- int base, int len)
+ unsigned int base, unsigned int len)
{
- int i;
-
subbuf->buflen = subbuf->len = len;
- iov_subsegment(buf->head, subbuf->head, &base, &len);
+ if (base < buf->head[0].iov_len) {
+ subbuf->head[0].iov_base = buf->head[0].iov_base + base;
+ subbuf->head[0].iov_len = min_t(unsigned int, len,
+ buf->head[0].iov_len - base);
+ len -= subbuf->head[0].iov_len;
+ base = 0;
+ } else {
+ subbuf->head[0].iov_base = NULL;
+ subbuf->head[0].iov_len = 0;
+ base -= buf->head[0].iov_len;
+ }
if (base < buf->page_len) {
- i = (base + buf->page_base) >> PAGE_CACHE_SHIFT;
- subbuf->pages = &buf->pages[i];
- subbuf->page_base = (base + buf->page_base) & ~PAGE_CACHE_MASK;
- subbuf->page_len = min((int)buf->page_len - base, len);
+ subbuf->page_len = min(buf->page_len - base, len);
+ base += buf->page_base;
+ subbuf->page_base = base & ~PAGE_CACHE_MASK;
+ subbuf->pages = &buf->pages[base >> PAGE_CACHE_SHIFT];
len -= subbuf->page_len;
base = 0;
} else {
subbuf->page_len = 0;
}
- iov_subsegment(buf->tail, subbuf->tail, &base, &len);
+ if (base < buf->tail[0].iov_len) {
+ subbuf->tail[0].iov_base = buf->tail[0].iov_base + base;
+ subbuf->tail[0].iov_len = min_t(unsigned int, len,
+ buf->tail[0].iov_len - base);
+ len -= subbuf->tail[0].iov_len;
+ base = 0;
+ } else {
+ subbuf->tail[0].iov_base = NULL;
+ subbuf->tail[0].iov_len = 0;
+ base -= buf->tail[0].iov_len;
+ }
+
if (base || len)
return -1;
return 0;
}
-/* obj is assumed to point to allocated memory of size at least len: */
-int
-read_bytes_from_xdr_buf(struct xdr_buf *buf, int base, void *obj, int len)
+static void __read_bytes_from_xdr_buf(struct xdr_buf *subbuf, void *obj, unsigned int len)
{
- struct xdr_buf subbuf;
- int this_len;
- int status;
+ unsigned int this_len;
- status = xdr_buf_subsegment(buf, &subbuf, base, len);
- if (status)
- goto out;
- this_len = min(len, (int)subbuf.head[0].iov_len);
- memcpy(obj, subbuf.head[0].iov_base, this_len);
+ this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);
+ memcpy(obj, subbuf->head[0].iov_base, this_len);
len -= this_len;
obj += this_len;
- this_len = min(len, (int)subbuf.page_len);
+ this_len = min_t(unsigned int, len, subbuf->page_len);
if (this_len)
- _copy_from_pages(obj, subbuf.pages, subbuf.page_base, this_len);
+ _copy_from_pages(obj, subbuf->pages, subbuf->page_base, this_len);
len -= this_len;
obj += this_len;
- this_len = min(len, (int)subbuf.tail[0].iov_len);
- memcpy(obj, subbuf.tail[0].iov_base, this_len);
-out:
- return status;
+ this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);
+ memcpy(obj, subbuf->tail[0].iov_base, this_len);
}
/* obj is assumed to point to allocated memory of size at least len: */
-int
-write_bytes_to_xdr_buf(struct xdr_buf *buf, int base, void *obj, int len)
+int read_bytes_from_xdr_buf(struct xdr_buf *buf, unsigned int base, void *obj, unsigned int len)
{
struct xdr_buf subbuf;
- int this_len;
int status;
status = xdr_buf_subsegment(buf, &subbuf, base, len);
- if (status)
- goto out;
- this_len = min(len, (int)subbuf.head[0].iov_len);
- memcpy(subbuf.head[0].iov_base, obj, this_len);
+ if (status != 0)
+ return status;
+ __read_bytes_from_xdr_buf(&subbuf, obj, len);
+ return 0;
+}
+
+static void __write_bytes_to_xdr_buf(struct xdr_buf *subbuf, void *obj, unsigned int len)
+{
+ unsigned int this_len;
+
+ this_len = min_t(unsigned int, len, subbuf->head[0].iov_len);
+ memcpy(subbuf->head[0].iov_base, obj, this_len);
len -= this_len;
obj += this_len;
- this_len = min(len, (int)subbuf.page_len);
+ this_len = min_t(unsigned int, len, subbuf->page_len);
if (this_len)
- _copy_to_pages(subbuf.pages, subbuf.page_base, obj, this_len);
+ _copy_to_pages(subbuf->pages, subbuf->page_base, obj, this_len);
len -= this_len;
obj += this_len;
- this_len = min(len, (int)subbuf.tail[0].iov_len);
- memcpy(subbuf.tail[0].iov_base, obj, this_len);
-out:
- return status;
+ this_len = min_t(unsigned int, len, subbuf->tail[0].iov_len);
+ memcpy(subbuf->tail[0].iov_base, obj, this_len);
+}
+
+/* obj is assumed to point to allocated memory of size at least len: */
+int write_bytes_to_xdr_buf(struct xdr_buf *buf, unsigned int base, void *obj, unsigned int len)
+{
+ struct xdr_buf subbuf;
+ int status;
+
+ status = xdr_buf_subsegment(buf, &subbuf, base, len);
+ if (status != 0)
+ return status;
+ __write_bytes_to_xdr_buf(&subbuf, obj, len);
+ return 0;
}
int
-xdr_decode_word(struct xdr_buf *buf, int base, u32 *obj)
+xdr_decode_word(struct xdr_buf *buf, unsigned int base, u32 *obj)
{
- u32 raw;
+ __be32 raw;
int status;
status = read_bytes_from_xdr_buf(buf, base, &raw, sizeof(*obj));
}
int
-xdr_encode_word(struct xdr_buf *buf, int base, u32 obj)
+xdr_encode_word(struct xdr_buf *buf, unsigned int base, u32 obj)
{
- u32 raw = htonl(obj);
+ __be32 raw = htonl(obj);
return write_bytes_to_xdr_buf(buf, base, &raw, sizeof(obj));
}
* entirely in the head or the tail, set object to point to it; otherwise
* try to find space for it at the end of the tail, copy it there, and
* set obj to point to it. */
-int
-xdr_buf_read_netobj(struct xdr_buf *buf, struct xdr_netobj *obj, int offset)
+int xdr_buf_read_netobj(struct xdr_buf *buf, struct xdr_netobj *obj, unsigned int offset)
{
- u32 tail_offset = buf->head[0].iov_len + buf->page_len;
- u32 obj_end_offset;
+ struct xdr_buf subbuf;
if (xdr_decode_word(buf, offset, &obj->len))
- goto out;
- obj_end_offset = offset + 4 + obj->len;
-
- if (obj_end_offset <= buf->head[0].iov_len) {
- /* The obj is contained entirely in the head: */
- obj->data = buf->head[0].iov_base + offset + 4;
- } else if (offset + 4 >= tail_offset) {
- if (obj_end_offset - tail_offset
- > buf->tail[0].iov_len)
- goto out;
- /* The obj is contained entirely in the tail: */
- obj->data = buf->tail[0].iov_base
- + offset - tail_offset + 4;
- } else {
- /* use end of tail as storage for obj:
- * (We don't copy to the beginning because then we'd have
- * to worry about doing a potentially overlapping copy.
- * This assumes the object is at most half the length of the
- * tail.) */
- if (obj->len > buf->tail[0].iov_len)
- goto out;
- obj->data = buf->tail[0].iov_base + buf->tail[0].iov_len -
- obj->len;
- if (read_bytes_from_xdr_buf(buf, offset + 4,
- obj->data, obj->len))
- goto out;
+ return -EFAULT;
+ if (xdr_buf_subsegment(buf, &subbuf, offset + 4, obj->len))
+ return -EFAULT;
- }
+ /* Is the obj contained entirely in the head? */
+ obj->data = subbuf.head[0].iov_base;
+ if (subbuf.head[0].iov_len == obj->len)
+ return 0;
+ /* ..or is the obj contained entirely in the tail? */
+ obj->data = subbuf.tail[0].iov_base;
+ if (subbuf.tail[0].iov_len == obj->len)
+ return 0;
+
+ /* use end of tail as storage for obj:
+ * (We don't copy to the beginning because then we'd have
+ * to worry about doing a potentially overlapping copy.
+ * This assumes the object is at most half the length of the
+ * tail.) */
+ if (obj->len > buf->buflen - buf->len)
+ return -ENOMEM;
+ if (buf->tail[0].iov_len != 0)
+ obj->data = buf->tail[0].iov_base + buf->tail[0].iov_len;
+ else
+ obj->data = buf->head[0].iov_base + buf->head[0].iov_len;
+ __read_bytes_from_xdr_buf(&subbuf, obj->data, obj->len);
return 0;
-out:
- return -1;
}
/* Returns 0 on success, or else a negative error code. */
return xdr_xcode_array2(buf, base, desc, 1);
}
+
+int
+xdr_process_buf(struct xdr_buf *buf, unsigned int offset, unsigned int len,
+ int (*actor)(struct scatterlist *, void *), void *data)
+{
+ int i, ret = 0;
+ unsigned page_len, thislen, page_offset;
+ struct scatterlist sg[1];
+
+ if (offset >= buf->head[0].iov_len) {
+ offset -= buf->head[0].iov_len;
+ } else {
+ thislen = buf->head[0].iov_len - offset;
+ if (thislen > len)
+ thislen = len;
+ sg_set_buf(sg, buf->head[0].iov_base + offset, thislen);
+ ret = actor(sg, data);
+ if (ret)
+ goto out;
+ offset = 0;
+ len -= thislen;
+ }
+ if (len == 0)
+ goto out;
+
+ if (offset >= buf->page_len) {
+ offset -= buf->page_len;
+ } else {
+ page_len = buf->page_len - offset;
+ if (page_len > len)
+ page_len = len;
+ len -= page_len;
+ page_offset = (offset + buf->page_base) & (PAGE_CACHE_SIZE - 1);
+ i = (offset + buf->page_base) >> PAGE_CACHE_SHIFT;
+ thislen = PAGE_CACHE_SIZE - page_offset;
+ do {
+ if (thislen > page_len)
+ thislen = page_len;
+ sg->page = buf->pages[i];
+ sg->offset = page_offset;
+ sg->length = thislen;
+ ret = actor(sg, data);
+ if (ret)
+ goto out;
+ page_len -= thislen;
+ i++;
+ page_offset = 0;
+ thislen = PAGE_CACHE_SIZE;
+ } while (page_len != 0);
+ offset = 0;
+ }
+ if (len == 0)
+ goto out;
+ if (offset < buf->tail[0].iov_len) {
+ thislen = buf->tail[0].iov_len - offset;
+ if (thislen > len)
+ thislen = len;
+ sg_set_buf(sg, buf->tail[0].iov_base + offset, thislen);
+ ret = actor(sg, data);
+ len -= thislen;
+ }
+ if (len != 0)
+ ret = -EINVAL;
+out:
+ return ret;
+}
+EXPORT_SYMBOL(xdr_process_buf);
+
projects / linux-drm-fsl-dcu.git / blobdiff