diff options
| -rw-r--r-- | fs/9p/fid.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c index 73ca55042cb0..616abaf1c6cd 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -41,10 +41,15 @@ * */ +static inline void __add_fid(struct dentry *dentry, struct p9_fid *fid) +{ + hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata); +} + void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid) { spin_lock(&dentry->d_lock); - hlist_add_head(&fid->dlist, (struct hlist_head *)&dentry->d_fsdata); + __add_fid(dentry, fid); spin_unlock(&dentry->d_lock); } @@ -198,8 +203,17 @@ static struct p9_fid *v9fs_fid_lookup_with_uid(struct dentry *dentry, } kfree(wnames); fid_out: - if (!IS_ERR(fid)) - v9fs_fid_add(dentry, fid); + if (!IS_ERR(fid)) { + spin_lock(&dentry->d_lock); + if (d_unhashed(dentry)) { + spin_unlock(&dentry->d_lock); + p9_client_clunk(fid); + fid = ERR_PTR(-ENOENT); + } else { + __add_fid(dentry, fid); + spin_unlock(&dentry->d_lock); + } + } err_out: up_read(&v9ses->rename_sem); return fid; |