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authorJ. Bruce Fields <bfields@redhat.com>2011-11-07 16:37:57 -0500
committerJ. Bruce Fields <bfields@redhat.com>2011-11-07 21:10:47 -0500
commitb93d87c19821ba7d3ee11557403d782e541071ad (patch)
tree982cdf816584c05131e497e3d79503e91260db8f /fs/nfsd
parentf8e6defe7f4456d8700e5a3796a1e9fb54a88543 (diff)
downloadlinux-b93d87c19821ba7d3ee11557403d782e541071ad.tar.bz2
nfsd4: fix lockowner matching
Lockowners are looked up by file as well as by owner, but we were forgetting to do a comparison on the file. This could cause an incorrect result from lockt. (Note looking up the inode from the lockowner is pretty awkward here. The data structures need fixing.) Cc: stable@kernel.org Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 47e94e33a975..5abced7a7408 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3809,16 +3809,29 @@ nevermind:
deny->ld_type = NFS4_WRITE_LT;
}
+static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner)
+{
+ struct nfs4_ol_stateid *lst;
+
+ if (!same_owner_str(&lo->lo_owner, owner, clid))
+ return false;
+ lst = list_first_entry(&lo->lo_owner.so_stateids,
+ struct nfs4_ol_stateid, st_perstateowner);
+ return lst->st_file->fi_inode == inode;
+}
+
static struct nfs4_lockowner *
find_lockowner_str(struct inode *inode, clientid_t *clid,
struct xdr_netobj *owner)
{
unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner);
+ struct nfs4_lockowner *lo;
struct nfs4_stateowner *op;
list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) {
- if (same_owner_str(op, owner, clid))
- return lockowner(op);
+ lo = lockowner(op);
+ if (same_lockowner_ino(lo, inode, clid, owner))
+ return lo;
}
return NULL;
}