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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-10 00:15:21 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-05-15 07:06:28 +0200 |
| commit | 8c1b456689ac0b27e8e16b35190e89a02fd1f121 (patch) | |
| tree | 7dd6bf6f5a3651986aea1f2066b5690c19197853 | |
| parent | VFS/namei: make the use of touch_atime() in get_link() RCU-safe. (diff) | |
| download | linux-8c1b456689ac0b27e8e16b35190e89a02fd1f121.tar.xz linux-8c1b456689ac0b27e8e16b35190e89a02fd1f121.zip | |
enable passing fast relative symlinks without dropping out of RCU mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | fs/namei.c | 13 |
1 files 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); |