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authorTrond Myklebust <Trond.Myklebust@netapp.com>2011-06-16 21:15:41 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-06-16 21:24:47 +0400
commitee7b75fc4f3ae49e1f25bf56219bb5de3c29afaf (patch)
tree929f8cb07d4e974f5cfa8952a8d6643edfb5a2f5 /fs/nfs
parent9e2dfdb3081edfae66a49013517e80dd8a0469fa (diff)
downloadlinux-ee7b75fc4f3ae49e1f25bf56219bb5de3c29afaf.tar.xz
NFSv4: Fix a readdir regression
Commit 7ebb9315 (NFS: use secinfo when crossing mountpoints) introduces a regression when decoding an NFSv4 readdir entry that sets the rdattr_error field. By treating the resulting value as if it is a decoding error, the current code may cause us to skip valid readdir entries. Reported-by: Andy Adamson <andros@netapp.com> Cc: stable@kernel.org [2.6.39] Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/nfs4xdr.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index c4b7d6c04948..5db44a8dddf9 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -3098,7 +3098,7 @@ out_overflow:
return -EIO;
}
-static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
+static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
{
__be32 *p;
@@ -3109,7 +3109,7 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap)
if (unlikely(!p))
goto out_overflow;
bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
- return -be32_to_cpup(p);
+ *res = -be32_to_cpup(p);
}
return 0;
out_overflow:
@@ -4070,6 +4070,7 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
int status;
umode_t fmode = 0;
uint32_t type;
+ int32_t err;
status = decode_attr_type(xdr, bitmap, &type);
if (status < 0)
@@ -4095,13 +4096,12 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
goto xdr_error;
fattr->valid |= status;
- status = decode_attr_error(xdr, bitmap);
- if (status == -NFS4ERR_WRONGSEC) {
- nfs_fixup_secinfo_attributes(fattr, fh);
- status = 0;
- }
+ err = 0;
+ status = decode_attr_error(xdr, bitmap, &err);
if (status < 0)
goto xdr_error;
+ if (err == -NFS4ERR_WRONGSEC)
+ nfs_fixup_secinfo_attributes(fattr, fh);
status = decode_attr_filehandle(xdr, bitmap, fh);
if (status < 0)