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enable passing fast relative symlinks without dropping out of RCU mode 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2015-05-09 18:15:21 -04:00
parent 8fa9dd2466
commit 8c1b456689
1 changed files with 8 additions and 5 deletions
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13
fs/namei.c
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@ -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);