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authorTrond Myklebust2012-08-14 17:14:17 -0400
committerTrond Myklebust2012-08-16 16:15:51 -0400
commitcff298c721099c9ac4cea7196a37097ba2847946 (patch)
treeff196c4709a0ea206a9bc61d322cbb12d98cb400 /fs
parentb291f1b1c86aa0c7bc3df2994e6a1a4e53f1fde0 (diff)
NFSv4: Don't use private xdr_stream fields in decode_getacl
Instead of using the private field xdr->p from struct xdr_stream, use the public xdr_stream_pos(). Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4xdr.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 54d3f5a9faa6..1bfbd67c556d 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -5045,10 +5045,10 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
struct nfs_getaclres *res)
{
unsigned int savep;
- __be32 *bm_p;
uint32_t attrlen,
bitmap[3] = {0};
int status;
+ unsigned int pg_offset;
res->acl_len = 0;
if ((status = decode_op_hdr(xdr, OP_GETATTR)) != 0)
@@ -5056,7 +5056,8 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
xdr_enter_page(xdr, xdr->buf->page_len);
- bm_p = xdr->p;
+ /* Calculate the offset of the page data */
+ pg_offset = xdr->buf->head[0].iov_len;
if ((status = decode_attr_bitmap(xdr, bitmap)) != 0)
goto out;
@@ -5070,18 +5071,18 @@ static int decode_getacl(struct xdr_stream *xdr, struct rpc_rqst *req,
/* The bitmap (xdr len + bitmaps) and the attr xdr len words
* are stored with the acl data to handle the problem of
* variable length bitmaps.*/
- res->acl_data_offset = (xdr->p - bm_p) << 2;
+ res->acl_data_offset = xdr_stream_pos(xdr) - pg_offset;
/* We ignore &savep and don't do consistency checks on
* the attr length. Let userspace figure it out.... */
res->acl_len = attrlen;
- if (attrlen + res->acl_data_offset > xdr->buf->page_len) {
+ if (attrlen > (xdr->nwords << 2)) {
if (res->acl_flags & NFS4_ACL_LEN_REQUEST) {
/* getxattr interface called with a NULL buf */
goto out;
}
dprintk("NFS: acl reply: attrlen %u > page_len %u\n",
- attrlen, xdr->buf->page_len);
+ attrlen, xdr->nwords << 2);
return -EINVAL;
}
} else