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authorAl Viro <viro@zeniv.linux.org.uk>2016-08-03 18:02:48 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2016-08-03 18:02:48 +0300
commit797fc16d8f00bf681b7f9969c0701725b472b11a (patch)
tree086e31f304992724b5e92eac90688601d29d7134 /fs/9p
parent6fa67e707559303e086303aeecc9e8b91ef497d5 (diff)
downloadlinux-797fc16d8f00bf681b7f9969c0701725b472b11a.tar.xz
9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()"
In v9fs_vfs_rename() we need to clone the parents' fids, not just find them. Spotted-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/fid.h4
-rw-r--r--fs/9p/vfs_inode.c4
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 12700df0bb51..d4c5002d56ad 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -31,4 +31,8 @@ static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
+static inline struct p9_fid *clone_fid(struct p9_fid *fid)
+{
+ return IS_ERR(fid) ? fid : p9_client_walk(fid, 0, NULL, 1);
+}
#endif
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 7da9a8354fad..26189eebcd1c 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -975,13 +975,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
- olddirfid = v9fs_parent_fid(old_dentry);
+ olddirfid = clone_fid(v9fs_parent_fid(old_dentry));
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
goto done;
}
- newdirfid = v9fs_parent_fid(new_dentry);
+ newdirfid = clone_fid(v9fs_parent_fid(new_dentry));
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
goto clunk_olddir;