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-rw-r--r--fs/9p/fid.c20
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;