NFS: Don't hash the negative dentry when optimising for an O_EXCL open
We don't want to leave an unverified hashed negative dentry if the
exclusive create fails to complete.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 3f0def6..166a833 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -992,9 +992,10 @@
}
dentry->d_op = NFS_PROTO(dir)->dentry_ops;
- /* Let vfs_create() deal with O_EXCL */
+ /* Let vfs_create() deal with O_EXCL. Instantiate, but don't hash
+ * the dentry. */
if (nd->intent.open.flags & O_EXCL) {
- d_add(dentry, NULL);
+ d_instantiate(dentry, NULL);
goto out;
}
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 796bc8e..0748c70 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1879,11 +1879,12 @@
}
state = nfs4_do_open(dir, &path, flags, sattr, cred);
put_rpccred(cred);
+ d_drop(dentry);
if (IS_ERR(state)) {
status = PTR_ERR(state);
goto out;
}
- d_instantiate(dentry, igrab(state->inode));
+ d_add(dentry, igrab(state->inode));
if (flags & O_EXCL) {
struct nfs_fattr fattr;
status = nfs4_do_setattr(state->inode, &fattr, sattr, state);