diff mbox

[39/79] link_path_walk: don't bother with walk_component() after jumping link

Message ID 1430803373-4948-39-git-send-email-viro@ZenIV.linux.org.uk (mailing list archive)
State New, archived
Headers show

Commit Message

Al Viro May 5, 2015, 5:22 a.m. UTC 
From: Al Viro <viro@zeniv.linux.org.uk>

... it does nothing if nd->last_type is LAST_BIND.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/namei.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/fs/namei.c b/fs/namei.c
index ea528ca..d6235ea 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1789,7 +1789,11 @@  static int link_path_walk(const char *name, struct nameidata *nd)
 					return err;
 				}
 				err = 0;
-				if (likely(s)) {
+				if (unlikely(!s)) {
+					/* jumped */
+					put_link(nd, &link, cookie);
+					break;
+				} else {
 					if (*s == '/') {
 						if (!nd->root.mnt)
 							set_root(nd);
@@ -1804,9 +1808,9 @@  static int link_path_walk(const char *name, struct nameidata *nd)
 						put_link(nd, &link, cookie);
 						break;
 					}
+					err = walk_component(nd, LOOKUP_FOLLOW);
+					put_link(nd, &link, cookie);
 				}
-				err = walk_component(nd, LOOKUP_FOLLOW);
-				put_link(nd, &link, cookie);
 			} while (err > 0);
 
 			current->link_count--;