From: Mike Waychison <michael.waychison@sun.com>
To: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: raven@themaw.net
Subject: [PATCH 27/28] Testing syscall for expiry
Date: Mon, 25 Oct 2004 10:52:12 -0400 [thread overview]
Message-ID: <1098715932358@sun.com> (raw)
In-Reply-To: <1098715902968@sun.com>
This patch adds a temporary syscall (to x86 only) that allows for quick
testing to make sure that mnt_expire works properly. Tests can be found in
the autofsng userspace package.
Signed-off-by: Mike Waychison <michael.waychison@sun.com>
---
arch/i386/kernel/entry.S | 1 +
fs/namespace.c | 32 ++++++++++++++++++++++++++++++++
include/asm-i386/unistd.h | 3 ++-
3 files changed, 35 insertions(+), 1 deletion(-)
Index: linux-2.6.9-quilt/arch/i386/kernel/entry.S
===================================================================
--- linux-2.6.9-quilt.orig/arch/i386/kernel/entry.S 2004-10-22 17:17:40.735271440 -0400
+++ linux-2.6.9-quilt/arch/i386/kernel/entry.S 2004-10-22 17:17:48.436100736 -0400
@@ -903,5 +903,6 @@ ENTRY(sys_call_table)
.long sys_ni_syscall
.long sys_ni_syscall
.long sys_mountfd /* 300 */
+ .long sys_mnt_expire
syscall_table_size=(.-sys_call_table)
Index: linux-2.6.9-quilt/include/asm-i386/unistd.h
===================================================================
--- linux-2.6.9-quilt.orig/include/asm-i386/unistd.h 2004-10-22 17:17:40.735271440 -0400
+++ linux-2.6.9-quilt/include/asm-i386/unistd.h 2004-10-22 17:17:48.436100736 -0400
@@ -290,8 +290,9 @@
#define __NR_mq_getsetattr (__NR_mq_open+5)
#define __NR_sys_kexec_load 283
#define __NR_mountfd 300
+#define __NR_mnt_expire 301
-#define NR_syscalls 301
+#define NR_syscalls 302
/* user-visible error numbers are in the range -1 - -124: see <asm-i386/errno.h> */
Index: linux-2.6.9-quilt/fs/namespace.c
===================================================================
--- linux-2.6.9-quilt.orig/fs/namespace.c 2004-10-22 17:17:47.809196040 -0400
+++ linux-2.6.9-quilt/fs/namespace.c 2004-10-22 17:17:48.437100584 -0400
@@ -1119,6 +1119,38 @@ static void bump_expiry_counter(struct v
parent->mnt_expiry_countdown = diff;
}
+/* TESTING PURPOSES ONLY: THIS IS NOT A REAL SYSCALL!! - IT WILL GO AWAY */
+asmlinkage int sys_mnt_expire(char __user *_path, int ticks)
+{
+ struct nameidata nd;
+ char *path;
+ int err;
+
+ path = getname(_path);
+ err = PTR_ERR(path);
+ if (IS_ERR(path))
+ goto out;
+
+ err = path_lookup(path, LOOKUP_FOLLOW|LOOKUP_DIRECTORY|LOOKUP_NOALT, &nd);
+ if (err)
+ goto out_name;
+
+ err = -EINVAL;
+ if (nd.mnt->mnt_root != nd.dentry)
+ goto out_nd;
+
+ err = -EBUSY;
+ if (!mnt_expire(nd.mnt, ticks))
+ err = 0;
+
+out_nd:
+ path_release(&nd);
+out_name:
+ putname(path);
+out:
+ return err;
+}
+
/*
* process a list of expirable mountpoints with the intent of discarding any
* mountpoints that aren't in use and haven't been touched since last we came
next prev parent reply other threads:[~2004-10-26 0:15 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 ` [PATCH 26/28] VFS: Introduce MNT_NOFOLLOW Mike Waychison
2004-10-25 14:52 ` Mike Waychison [this message]
2004-10-25 15:01 ` [PATCH 27/28] Testing syscall for expiry 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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