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authorAl Viro <viro@zeniv.linux.org.uk>2015-05-12 04:10:18 (GMT)
committerAl Viro <viro@zeniv.linux.org.uk>2015-05-15 05:10:36 (GMT)
commit5a8d87e8ed1d6aabdb865fea31e337b2c627dbe0 (patch)
treeed93c5bf6dd9c08425b7b1697b48bbcdb94b7450 /fs/namei.c
parent203bc643db59e2538e9a3f19be1636cdfd2bb2db (diff)
downloadlinux-5a8d87e8ed1d6aabdb865fea31e337b2c627dbe0.tar.xz
namei: unlazy_walk() doesn't need to mess with current->fs anymore
now that we have ->root_seq, legitimize_path(&nd->root, nd->root_seq) will do just fine... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/namei.c b/fs/namei.c
index a5ed0d0..0cccb24 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -651,7 +651,6 @@ static bool legitimize_links(struct nameidata *nd)
*/
static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq)
{
- struct fs_struct *fs = current->fs;
struct dentry *parent = nd->path.dentry;
BUG_ON(!(nd->flags & LOOKUP_RCU));
@@ -691,13 +690,11 @@ static int unlazy_walk(struct nameidata *nd, struct dentry *dentry, unsigned seq
* still valid and get it if required.
*/
if (nd->root.mnt && !(nd->flags & LOOKUP_ROOT)) {
- spin_lock(&fs->lock);
- if (unlikely(!path_equal(&nd->root, &fs->root))) {
- spin_unlock(&fs->lock);
- goto drop_dentry;
+ if (unlikely(!legitimize_path(nd, &nd->root, nd->root_seq))) {
+ rcu_read_unlock();
+ dput(dentry);
+ return -ECHILD;
}
- path_get(&nd->root);
- spin_unlock(&fs->lock);
}
rcu_read_unlock();