Zhang Yi <yi.zhang@xxxxxxxxxx> writes: > Now that we have kernel message at mount time, system administrator > could acquire the mount time, device and options easily. But we don't > have corresponding unmounting message at umount time, so we cannot know > if someone umount a filesystem easily. Some of the modern filesystems > (e.g. xfs) have the umounting kernel message, so add one for ext4 > filesystem for convenience. > > EXT4-fs (sdb): mounted filesystem with ordered data mode. Quota mode: none. > EXT4-fs (sdb): unmounting filesystem. I don't think sysadmins should be relying on the kernel log for this, since the information can easily be overwritten by new messages there. Is there a reason why you can't just monitor /proc/self/mountinfo? > Signed-off-by: Zhang Yi <yi.zhang@xxxxxxxxxx> > --- > fs/ext4/super.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/fs/ext4/super.c b/fs/ext4/super.c > index 81749eaddf4c..bdecf62f4b55 100644 > --- a/fs/ext4/super.c > +++ b/fs/ext4/super.c > @@ -1199,6 +1199,9 @@ static void ext4_put_super(struct super_block *sb) > int aborted = 0; > int i, err; > > + if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) > + ext4_msg(sb, KERN_INFO, "unmounting filesystem."); > + > ext4_unregister_li_request(sb); > ext4_quota_off_umount(sb); -- Gabriel Krisman Bertazi
