From: Mike Waychison <michael.waychison@sun.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: raven@themaw.net
Subject: [PATCH 26/28] VFS: Introduce MNT_NOFOLLOW
Date: Mon, 25 Oct 2004 10:51:42 -0400 [thread overview]
Message-ID: <1098715902968@sun.com> (raw)
In-Reply-To: <10987158711277@sun.com>
Umounting direct mounts requires the ability to umount without following
->follow_link. We do this by adding a new flag called MNT_NOFOLLOW to
umount2.
Signed-off-by: Mike Waychison <michael.waychison@sun.com>
---
fs/namespace.c | 3 ++-
include/linux/fs.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
Index: linux-2.6.9-quilt/include/linux/fs.h
===================================================================
--- linux-2.6.9-quilt.orig/include/linux/fs.h 2004-10-22 17:17:43.766810576 -0400
+++ linux-2.6.9-quilt/include/linux/fs.h 2004-10-22 17:17:47.808196192 -0400
@@ -735,6 +735,7 @@ extern int send_sigurg(struct fown_struc
#define MNT_FORCE 0x00000001 /* Attempt to forcibily umount */
#define MNT_DETACH 0x00000002 /* Just detach from the tree */
+#define MNT_NOFOLLOW 0x00000004 /* Do not follow symlinks */
extern struct list_head super_blocks;
extern spinlock_t sb_lock;
Index: linux-2.6.9-quilt/fs/namespace.c
===================================================================
--- linux-2.6.9-quilt.orig/fs/namespace.c 2004-10-22 17:17:45.491548376 -0400
+++ linux-2.6.9-quilt/fs/namespace.c 2004-10-22 17:17:47.809196040 -0400
@@ -693,8 +693,9 @@ asmlinkage long sys_umount(char __user *
{
struct nameidata nd;
int retval;
+ int walk_flags = flags & MNT_NOFOLLOW ? 0 : LOOKUP_FOLLOW;
- retval = __user_walk(name, LOOKUP_FOLLOW, &nd);
+ retval = __user_walk(name, walk_flags, &nd);
if (retval)
goto out;
retval = -EINVAL;
next prev parent reply other threads:[~2004-10-25 15:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <10987155332448@sun.com>
2004-10-25 14:46 ` [PATCH 15/28] VFS: Mountpoint file descriptor umount support Mike Waychison
2004-10-25 14:46 ` [PATCH 16/28] VFS: Mountpoint file descriptor attach support Mike Waychison
2004-10-25 14:47 ` [PATCH 17/28] VFS: Mountpoint file descriptor walking Mike Waychison
2004-10-25 14:47 ` [PATCH 18/28] VFS: Mountpoint file descriptor read properties Mike Waychison
2004-10-25 14:48 ` [PATCH 19/28] VFS: Mountpoint file descriptor expiry support Mike Waychison
2004-10-25 14:48 ` [PATCH 20/28] HOTPLUG: call_usermodehelper callback support Mike Waychison
2004-10-25 14:49 ` [PATCH 21/28] HOTPLUG: Hack to allow for call to execve Mike Waychison
2004-10-25 14:49 ` [PATCH 22/28] VFS: Export put_namespace Mike Waychison
2004-10-25 14:50 ` [PATCH 23/28] VFS: Export get_sb_pseudo Mike Waychison
2004-10-25 14:50 ` [PATCH 24/28] VFS: Fixup for ->follow_link on root of filesystem Mike Waychison
2004-10-25 14:51 ` [PATCH 25/28] VFS: statfs(64) shouldn't follow last component symlink Mike Waychison
2004-10-25 14:51 ` Mike Waychison [this message]
2004-10-25 14:52 ` [PATCH 27/28] Testing syscall for expiry Mike Waychison
2004-10-25 15:01 ` Christoph Hellwig
2004-10-25 15:37 ` [PATCH 28/28] AUTOFSNG: New autofs filesystem (resend) Mike Waychison
2004-10-25 15:14 ` [PATCH 25/28] VFS: statfs(64) shouldn't follow last component symlink Christoph Hellwig
2004-10-25 15:21 ` Mike Waychison
2004-10-25 15:18 ` [PATCH 20/28] HOTPLUG: call_usermodehelper callback support Christoph Hellwig
2004-10-25 15:29 ` Mike Waychison
2004-10-26 10:28 ` [PATCH 15/28] VFS: Mountpoint file descriptor umount support Christoph Hellwig
2004-10-26 14:16 ` Mike Waychison
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