From: Toshiyuki Okajima <toshi.okajima@xxxxxxxxxxxxxx>
ext4 doesn't log a record of having unmounted the filesystem. And ext4 doesn't
log a record when the filesystem is remounted also with read-only. Therefore
in the system log, we cannot judge whether or not at the certain time this
filesystem user touches it.
For enterprise users, they often want to know when a certain filesystem is
mounted/remounted/unmounted.
So, we output the message to the system log when the filesystem is
remounted/unmounted.
Signed-off-by: Toshiyuki Okajima <toshi.okajima@xxxxxxxxxxxxxx>
---
fs/ext4/super.c | 30 ++++++++++++++++++++++--------
1 file changed, 22 insertions(+), 8 deletions(-)
diff -Nurp linux-2.6.31.orig/fs/ext4/super.c linux-2.6.31/fs/ext4/super.c
--- linux-2.6.31.orig/fs/ext4/super.c 2009-09-10 07:13:59.000000000 +0900
+++ linux-2.6.31/fs/ext4/super.c 2009-09-11 17:11:07.658464956 +0900
@@ -508,6 +508,25 @@ void ext4_update_dynamic_rev(struct supe
*/
}
+static void ext4_print_mount_message(struct super_block *sb,
+ int is_remount)
+{
+ if (EXT4_SB(sb)->s_journal) {
+ ext4_msg(sb, KERN_INFO, "%s, %s journal on %s",
+ is_remount? "remounted": "mounted",
+ EXT4_SB(sb)->s_journal->j_inode ? "internal" :
+ "external", EXT4_SB(sb)->s_journal->j_devname);
+ } else {
+ ext4_msg(sb, KERN_INFO, "%s, no journal",
+ is_remount? "remounted": "mounted");
+ }
+}
+
+static void ext4_print_umount_message(struct super_block *sb)
+{
+ ext4_msg(sb, KERN_INFO, "unmounted");
+}
+
/*
* Open the external journal device
*/
@@ -645,6 +664,7 @@ static void ext4_put_super(struct super_
* Now that we are completely done shutting down the
* superblock, we need to actually destroy the kobject.
*/
+ ext4_print_umount_message(sb);
unlock_kernel();
unlock_super(sb);
kobject_put(&sbi->s_kobj);
@@ -1645,14 +1665,6 @@ static int ext4_setup_super(struct super
EXT4_BLOCKS_PER_GROUP(sb),
EXT4_INODES_PER_GROUP(sb),
sbi->s_mount_opt);
-
- if (EXT4_SB(sb)->s_journal) {
- ext4_msg(sb, KERN_INFO, "%s journal on %s",
- EXT4_SB(sb)->s_journal->j_inode ? "internal" :
- "external", EXT4_SB(sb)->s_journal->j_devname);
- } else {
- ext4_msg(sb, KERN_INFO, "no journal");
- }
return res;
}
@@ -2806,6 +2818,7 @@ no_journal:
}
ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY);
+ ext4_print_mount_message(sb, 0);
/* determine the minimum size of new large inodes, if present */
if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) {
@@ -3547,6 +3560,7 @@ static int ext4_remount(struct super_blo
old_opts.s_qf_names[i] != sbi->s_qf_names[i])
kfree(old_opts.s_qf_names[i]);
#endif
+ ext4_print_mount_message(sb, 1);
unlock_super(sb);
unlock_kernel();
return 0;
--
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