(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 <[email protected]>
----
diff -urN RC12-rc4-3/fs/namei.c RC12-rc4-4/fs/namei.c
--- RC12-rc4-3/fs/namei.c 2005-05-19 16:39:31.314263905 -0400
+++ RC12-rc4-4/fs/namei.c 2005-05-19 16:39:32.418043961 -0400
@@ -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;
-
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