From 8c1b456689ac0b27e8e16b35190e89a02fd1f121 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 9 May 2015 18:15:21 -0400 Subject: [PATCH] enable passing fast relative symlinks without dropping out of RCU mode Signed-off-by: Al Viro --- fs/namei.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/fs/namei.c b/fs/namei.c index d9f77ff60b55..bf46e1010a74 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -975,11 +975,6 @@ const char *get_link(struct nameidata *nd) touch_atime(&last->link); } - if (nd->flags & LOOKUP_RCU) { - if (unlikely(unlazy_walk(nd, NULL, 0))) - return ERR_PTR(-ECHILD); - } - error = security_inode_follow_link(dentry, inode, nd->flags & LOOKUP_RCU); if (unlikely(error)) @@ -988,6 +983,10 @@ const char *get_link(struct nameidata *nd) nd->last_type = LAST_BIND; res = inode->i_link; if (!res) { + if (nd->flags & LOOKUP_RCU) { + if (unlikely(unlazy_walk(nd, NULL, 0))) + return ERR_PTR(-ECHILD); + } res = inode->i_op->follow_link(dentry, &last->cookie); if (IS_ERR_OR_NULL(res)) { last->cookie = NULL; @@ -995,6 +994,10 @@ const char *get_link(struct nameidata *nd) } } if (*res == '/') { + if (nd->flags & LOOKUP_RCU) { + if (unlikely(unlazy_walk(nd, NULL, 0))) + return ERR_PTR(-ECHILD); + } if (!nd->root.mnt) set_root(nd); path_put(&nd->path); -- 2.20.1