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9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()"

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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>
This commit is contained in:
Al Viro 2016-08-03 11:02:48 -04:00
parent 6fa67e7075
commit 797fc16d8f
2 changed files with 6 additions and 2 deletions
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4
fs/9p/fid.h
View File

@ -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

4
fs/9p/vfs_inode.c
View File

@ -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;