From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 18 Oct 2005 21:20:18 +0000 (-0700)
Subject: VFS: Make link_path_walk set LOOKUP_CONTINUE before calling permission().
X-Git-Tag: v2.6.15-rc1~733^2~55^2~6
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cdce5d6b94b6182f6d8a5b7b52923933e98cbc92;p=linux-2.6

VFS: Make link_path_walk set LOOKUP_CONTINUE before calling permission().

 This will allow nfs_permission() to perform additional optimizations when
 walking the path, by folding the ACCESS(MAY_EXEC) call on the directory
 into the lookup revalidation.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---

diff --git a/fs/namei.c b/fs/namei.c
index 0d1dff7d3d..aaaa810362 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -763,6 +763,7 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd)
 		struct qstr this;
 		unsigned int c;
 
+		nd->flags |= LOOKUP_CONTINUE;
 		err = exec_permission_lite(inode, nd);
 		if (err == -EAGAIN) { 
 			err = permission(inode, MAY_EXEC, nd);
@@ -815,7 +816,6 @@ static fastcall int __link_path_walk(const char * name, struct nameidata *nd)
 			if (err < 0)
 				break;
 		}
-		nd->flags |= LOOKUP_CONTINUE;
 		/* This does the actual lookups.. */
 		err = do_lookup(nd, &this, &next);
 		if (err)