memcpy(p, obj->data, obj->len);
return p + XDR_QUADLEN(obj->len);
}
+EXPORT_SYMBOL_GPL(xdr_encode_netobj);
__be32 *
xdr_decode_netobj(__be32 *p, struct xdr_netobj *obj)
obj->data = (u8 *) p;
return p + XDR_QUADLEN(len);
}
+EXPORT_SYMBOL_GPL(xdr_decode_netobj);
/**
* xdr_encode_opaque_fixed - Encode fixed length opaque data
}
return p;
}
-EXPORT_SYMBOL(xdr_encode_opaque_fixed);
+EXPORT_SYMBOL_GPL(xdr_encode_opaque_fixed);
/**
* xdr_encode_opaque - Encode variable length opaque data
*p++ = htonl(nbytes);
return xdr_encode_opaque_fixed(p, ptr, nbytes);
}
-EXPORT_SYMBOL(xdr_encode_opaque);
+EXPORT_SYMBOL_GPL(xdr_encode_opaque);
__be32 *
xdr_encode_string(__be32 *p, const char *string)
{
return xdr_encode_array(p, string, strlen(string));
}
+EXPORT_SYMBOL_GPL(xdr_encode_string);
__be32 *
-xdr_decode_string_inplace(__be32 *p, char **sp, int *lenp, int maxlen)
+xdr_decode_string_inplace(__be32 *p, char **sp,
+ unsigned int *lenp, unsigned int maxlen)
{
- unsigned int len;
+ u32 len;
- if ((len = ntohl(*p++)) > maxlen)
+ len = ntohl(*p++);
+ if (len > maxlen)
return NULL;
*lenp = len;
*sp = (char *) p;
return p + XDR_QUADLEN(len);
}
+EXPORT_SYMBOL_GPL(xdr_decode_string_inplace);
void
xdr_encode_pages(struct xdr_buf *xdr, struct page **pages, unsigned int base,
xdr->buflen += len;
xdr->len += len;
}
+EXPORT_SYMBOL_GPL(xdr_encode_pages);
void
xdr_inline_pages(struct xdr_buf *xdr, unsigned int offset,
xdr->buflen += len;
}
-
+EXPORT_SYMBOL_GPL(xdr_inline_pages);
/*
* Helper routines for doing 'memmove' like operations on a struct xdr_buf
pgto = pages + (pgbase >> PAGE_CACHE_SHIFT);
pgbase &= ~PAGE_CACHE_MASK;
- do {
+ for (;;) {
copy = PAGE_CACHE_SIZE - pgbase;
if (copy > len)
copy = len;
memcpy(vto + pgbase, p, copy);
kunmap_atomic(vto, KM_USER0);
+ len -= copy;
+ if (len == 0)
+ break;
+
pgbase += copy;
if (pgbase == PAGE_CACHE_SIZE) {
flush_dcache_page(*pgto);
pgto++;
}
p += copy;
-
- } 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.
*/
{
xdr_shrink_bufhead(buf, len);
}
+EXPORT_SYMBOL_GPL(xdr_shift_buf);
/**
* xdr_init_encode - Initialize a struct xdr_stream for sending data.
iov->iov_len += len;
}
}
-EXPORT_SYMBOL(xdr_init_encode);
+EXPORT_SYMBOL_GPL(xdr_init_encode);
/**
* xdr_reserve_space - Reserve buffer space for sending
xdr->buf->len += nbytes;
return p;
}
-EXPORT_SYMBOL(xdr_reserve_space);
+EXPORT_SYMBOL_GPL(xdr_reserve_space);
/**
* xdr_write_pages - Insert a list of pages into an XDR buffer for sending
buf->buflen += len;
buf->len += len;
}
-EXPORT_SYMBOL(xdr_write_pages);
+EXPORT_SYMBOL_GPL(xdr_write_pages);
/**
* xdr_init_decode - Initialize an xdr_stream for decoding data.
xdr->p = p;
xdr->end = (__be32 *)((char *)iov->iov_base + len);
}
-EXPORT_SYMBOL(xdr_init_decode);
+EXPORT_SYMBOL_GPL(xdr_init_decode);
/**
* xdr_inline_decode - Retrieve non-page XDR data to decode
xdr->p = q;
return p;
}
-EXPORT_SYMBOL(xdr_inline_decode);
+EXPORT_SYMBOL_GPL(xdr_inline_decode);
/**
* xdr_read_pages - Ensure page-based XDR data to decode is aligned at current pointer position
xdr->p = (__be32 *)((char *)iov->iov_base + padding);
xdr->end = (__be32 *)((char *)iov->iov_base + end);
}
-EXPORT_SYMBOL(xdr_read_pages);
+EXPORT_SYMBOL_GPL(xdr_read_pages);
/**
* xdr_enter_page - decode data from the XDR page
xdr->p = (__be32 *)(kaddr + xdr->buf->page_base);
xdr->end = (__be32 *)((char *)xdr->p + len);
}
-EXPORT_SYMBOL(xdr_enter_page);
+EXPORT_SYMBOL_GPL(xdr_enter_page);
static struct kvec empty_iov = {.iov_base = NULL, .iov_len = 0};
buf->page_len = 0;
buf->buflen = buf->len = iov->iov_len;
}
+EXPORT_SYMBOL_GPL(xdr_buf_from_iov);
/* 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. */
return -1;
return 0;
}
+EXPORT_SYMBOL_GPL(xdr_buf_subsegment);
-/* obj is assumed to point to allocated memory of size at least len: */
-int
-read_bytes_from_xdr_buf(struct xdr_buf *buf, unsigned int base, void *obj, unsigned int len)
+static void __read_bytes_from_xdr_buf(struct xdr_buf *subbuf, void *obj, unsigned int len)
{
- struct xdr_buf subbuf;
unsigned int this_len;
- int status;
- status = xdr_buf_subsegment(buf, &subbuf, base, len);
- if (status)
- goto out;
- this_len = min_t(unsigned int, len, 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_t(unsigned int, len, 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_t(unsigned int, len, 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, unsigned int base, void *obj, unsigned int len)
+int read_bytes_from_xdr_buf(struct xdr_buf *buf, unsigned int base, void *obj, unsigned int len)
{
struct xdr_buf subbuf;
- unsigned int this_len;
int status;
status = xdr_buf_subsegment(buf, &subbuf, base, len);
- if (status)
- goto out;
- this_len = min_t(unsigned int, len, 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;
+}
+EXPORT_SYMBOL_GPL(read_bytes_from_xdr_buf);
+
+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_t(unsigned int, len, 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_t(unsigned int, len, 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
*obj = ntohl(raw);
return 0;
}
+EXPORT_SYMBOL_GPL(xdr_decode_word);
int
xdr_encode_word(struct xdr_buf *buf, unsigned int base, u32 obj)
return write_bytes_to_xdr_buf(buf, base, &raw, sizeof(obj));
}
+EXPORT_SYMBOL_GPL(xdr_encode_word);
/* If the netobj starting offset bytes from the start of xdr_buf is contained
* 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, unsigned int offset)
+int xdr_buf_read_netobj(struct xdr_buf *buf, struct xdr_netobj *obj, unsigned int offset)
{
- unsigned int tail_offset = buf->head[0].iov_len + buf->page_len;
- unsigned int 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;
}
+EXPORT_SYMBOL_GPL(xdr_buf_read_netobj);
/* Returns 0 on success, or else a negative error code. */
static int
return xdr_xcode_array2(buf, base, desc, 0);
}
+EXPORT_SYMBOL_GPL(xdr_decode_array2);
int
xdr_encode_array2(struct xdr_buf *buf, unsigned int base,
return xdr_xcode_array2(buf, base, desc, 1);
}
+EXPORT_SYMBOL_GPL(xdr_encode_array2);
+
+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];
+
+ sg_init_table(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_set_page(sg, buf->pages[i], thislen, page_offset);
+ 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_GPL(xdr_process_buf);
+
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff