[PATCH] namei fixes (4/19)
path.mnt in open_namei() set to mirror nd->mnt.
nd->mnt is set in 3 places in that function - path_lookup() in the beginning,
__follow_down() loop after do_last: and __do_follow_link() call after
do_link:.
We set path.mnt to nd->mnt after path_lookup() and __do_follow_link(). In
__follow_down() loop we use &path.mnt instead of &nd->mnt and set nd->mnt to
path.mnt immediately after that loop.
Obviously equivalent transformation.
Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/namei.c b/fs/namei.c
index 167f19b..e42f7c3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1442,6 +1442,7 @@
nd->flags &= ~LOOKUP_PARENT;
down(&dir->d_inode->i_sem);
path.dentry = __lookup_hash(&nd->last, nd->dentry, nd);
+ path.mnt = nd->mnt;
do_last:
error = PTR_ERR(path.dentry);
@@ -1479,7 +1480,8 @@
error = -ELOOP;
if (flag & O_NOFOLLOW)
goto exit_dput;
- while (__follow_down(&nd->mnt,&path.dentry) && d_mountpoint(path.dentry));
+ while (__follow_down(&path.mnt,&path.dentry) && d_mountpoint(path.dentry));
+ nd->mnt = path.mnt;
}
error = -ENOENT;
if (!path.dentry->d_inode)
@@ -1524,6 +1526,7 @@
goto exit_dput;
error = __do_follow_link(path.dentry, nd);
dput(path.dentry);
+ path.mnt = nd->mnt;
if (error)
return error;
nd->flags &= ~LOOKUP_PARENT;