Add noatime option to not update atime on files in a filesystem (unless

ctime or mtime has changed).  Useful for laptops and news servers.

4 files changed, 21 insertions, 14 deletions

diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c
index ebfa0276489..74d914ee7e8 100644
--- a/sys/kern/vfs_syscalls.c
+++ b/sys/kern/vfs_syscalls.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfs_syscalls.c,v 1.24 1997/02/26 16:38:20 niklas Exp $	*/
+/*	$OpenBSD: vfs_syscalls.c,v 1.25 1997/03/02 09:38:35 millert Exp $	*/
 /*	$NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $	*/
 
 /*
@@ -251,9 +251,9 @@ update:
 	else if (mp->mnt_flag & MNT_RDONLY)
 		mp->mnt_flag |= MNT_WANTRDWR;
 	mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
-	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
+	    MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME);
 	mp->mnt_flag |= SCARG(uap, flags) & (MNT_NOSUID | MNT_NOEXEC |
-	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC);
+	    MNT_NODEV | MNT_SYNCHRONOUS | MNT_UNION | MNT_ASYNC | MNT_NOATIME);
 	/*
 	 * Mount the filesystem.
 	 */
diff --git a/sys/sys/mount.h b/sys/sys/mount.h
index 6a1d52a1023..85aa43e7286 100644
--- a/sys/sys/mount.h
+++ b/sys/sys/mount.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: mount.h,v 1.12 1996/12/24 20:14:35 dm Exp $	*/
+/*	$OpenBSD: mount.h,v 1.13 1997/03/02 09:38:22 millert Exp $	*/
 /*	$NetBSD: mount.h,v 1.48 1996/02/18 11:55:47 fvdl Exp $	*/
 
 /*
@@ -133,22 +133,23 @@ struct mount {
 #define	MNT_NODEV	0x00000010	/* don't interpret special files */
 #define	MNT_UNION	0x00000020	/* union with underlying filesystem */
 #define	MNT_ASYNC	0x00000040	/* file system written asynchronously */
+#define	MNT_NOATIME	0x00000080	/* don't update atime on files */
 
 /*
  * exported mount flags.
  */
-#define	MNT_EXRDONLY	0x00000080	/* exported read only */
-#define	MNT_EXPORTED	0x00000100	/* file system is exported */
-#define	MNT_DEFEXPORTED	0x00000200	/* exported to the world */
-#define	MNT_EXPORTANON	0x00000400	/* use anon uid mapping for everyone */
-#define	MNT_EXKERB	0x00000800	/* exported with Kerberos uid mapping */
+#define	MNT_EXRDONLY	0x00000100	/* exported read only */
+#define	MNT_EXPORTED	0x00000200	/* file system is exported */
+#define	MNT_DEFEXPORTED	0x00000400	/* exported to the world */
+#define	MNT_EXPORTANON	0x00000800	/* use anon uid mapping for everyone */
+#define	MNT_EXKERB	0x00001000	/* exported with Kerberos uid mapping */
 
 /*
  * Flags set by internal operations.
  */
-#define	MNT_LOCAL	0x00001000	/* filesystem is stored locally */
-#define	MNT_QUOTA	0x00002000	/* quotas are enabled on filesystem */
-#define	MNT_ROOTFS	0x00004000	/* identifies the root filesystem */
+#define	MNT_LOCAL	0x00002000	/* filesystem is stored locally */
+#define	MNT_QUOTA	0x00004000	/* quotas are enabled on filesystem */
+#define	MNT_ROOTFS	0x00008000	/* identifies the root filesystem */
 
 /*
  * Mask of flags that are visible to statfs()
diff --git a/sys/ufs/ffs/ffs_inode.c b/sys/ufs/ffs/ffs_inode.c
index 6c33e684cbc..1b1081e5ee2 100644
--- a/sys/ufs/ffs/ffs_inode.c
+++ b/sys/ufs/ffs/ffs_inode.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ffs_inode.c,v 1.4 1996/11/05 03:30:12 tholo Exp $	*/
+/*	$OpenBSD: ffs_inode.c,v 1.5 1997/03/02 09:38:13 millert Exp $	*/
 /*	$NetBSD: ffs_inode.c,v 1.10 1996/05/11 18:27:19 mycroft Exp $	*/
 
 /*
@@ -96,6 +96,9 @@ ffs_update(v)
 		ip->i_flag &=
 		    ~(IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE);
 		return (0);
+	} else if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) &&
+	    !(ip->i_flag & (IN_CHANGE | IN_UPDATE))) {
+		ip->i_flag &= ~IN_ACCESS;
 	}
 	if ((ip->i_flag &
 	    (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0)
diff --git a/sys/ufs/lfs/lfs_inode.c b/sys/ufs/lfs/lfs_inode.c
index b778b7db9fd..e8fd0be7baa 100644
--- a/sys/ufs/lfs/lfs_inode.c
+++ b/sys/ufs/lfs/lfs_inode.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: lfs_inode.c,v 1.4 1996/07/01 07:41:51 downsj Exp $	*/
+/*	$OpenBSD: lfs_inode.c,v 1.5 1997/03/02 09:38:18 millert Exp $	*/
 /*	$NetBSD: lfs_inode.c,v 1.5 1996/05/11 18:27:35 mycroft Exp $	*/
 
 /*
@@ -90,6 +90,9 @@ lfs_update(v)
 	if (vp->v_mount->mnt_flag & MNT_RDONLY)
 		return (0);
 	ip = VTOI(vp);
+	if ((ap->a_vp->v_mount->mnt_flag & MNT_NOATIME) &&
+	    !(ip->i_flag & (IN_CHANGE | IN_UPDATE)))
+		ip->i_flag &= ~IN_ACCESS;
 	if ((ip->i_flag &
 	    (IN_ACCESS | IN_CHANGE | IN_MODIFIED | IN_UPDATE)) == 0)
 		return (0);