[PATCH] record mount time and expose it in /proc/self/mounts

[Sean Neakums]

Not sure if this is even useful, never mind implemented correctly.
Against 2.6.0-test6.


diff -urN --exclude '*~' --exclude '*.orig' T6/fs/namespace.c edited/fs/namespace.c
--- T6/fs/namespace.c	2003-07-28 10:22:18.000000000 +0100
+++ edited/fs/namespace.c	2003-10-01 20:17:18.000000000 +0100
@@ -21,6 +21,7 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 #include <linux/mount.h>
+#include <linux/time.h>
 #include <asm/uaccess.h>
 
 extern int __init init_rootfs(void);
@@ -152,6 +153,7 @@
 		mnt->mnt_root = dget(root);
 		mnt->mnt_mountpoint = mnt->mnt_root;
 		mnt->mnt_parent = mnt;
+		do_gettimeofday(&mnt->mnt_when);
 	}
 	return mnt;
 }
@@ -236,6 +238,7 @@
 	}
 	if (mnt->mnt_sb->s_op->show_options)
 		err = mnt->mnt_sb->s_op->show_options(m, mnt);
+	seq_printf(m, ",when=%ld", (long)mnt->mnt_when.tv_sec);
 	seq_puts(m, " 0 0\n");
 	return err;
 }
diff -urN --exclude '*~' --exclude '*.orig' T6/fs/super.c edited/fs/super.c
--- T6/fs/super.c	2003-10-01 18:50:21.000000000 +0100
+++ edited/fs/super.c	2003-10-01 20:17:18.000000000 +0100
@@ -32,6 +32,7 @@
 #include <linux/security.h>
 #include <linux/vfs.h>
 #include <linux/writeback.h>		/* for the emergency remount stuff */
+#include <linux/time.h>
 #include <asm/uaccess.h>
 
 
@@ -693,6 +694,7 @@
 	mnt->mnt_parent = mnt;
 	up_write(&sb->s_umount);
 	put_filesystem(type);
+	do_gettimeofday(&mnt->mnt_when);
 	return mnt;
 out_sb:
 	up_write(&sb->s_umount);
diff -urN --exclude '*~' --exclude '*.orig' T6/include/linux/mount.h edited/include/linux/mount.h
--- T6/include/linux/mount.h	2003-07-14 04:30:35.000000000 +0100
+++ edited/include/linux/mount.h	2003-10-01 20:17:18.000000000 +0100
@@ -13,6 +13,7 @@
 #ifdef __KERNEL__
 
 #include <linux/list.h>
+#include <linux/time.h>
 
 #define MNT_NOSUID	1
 #define MNT_NODEV	2
@@ -30,6 +31,7 @@
 	atomic_t mnt_count;
 	int mnt_flags;
 	char *mnt_devname;		/* Name of device e.g. /dev/dsk/hda1 */
+	struct timeval mnt_when;
 	struct list_head mnt_list;
 };
 
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