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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2015-05-12 00:10:18 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-15 01:10:36 -0400 |
| commit | 5a8d87e8ed1d6aabdb865fea31e337b2c627dbe0 (patch) | |
| tree | ed93c5bf6dd9c08425b7b1697b48bbcdb94b7450 /fs/namei.c | |
| parent | update Documentation/filesystems/ regarding the follow_link/put_link changes (diff) | |
| download | linux-dev-5a8d87e8ed1d6aabdb865fea31e337b2c627dbe0.tar.xz linux-dev-5a8d87e8ed1d6aabdb865fea31e337b2c627dbe0.zip | |
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.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/namei.c b/fs/namei.c index a5ed0d070a20..0cccb24ac0b7 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(); |