From bb0fbc782ee9fa8c970c8e8e17c1a52ff9419182 Mon Sep 17 00:00:00 2001 From: Lukas Czerner Date: Tue, 8 Nov 2022 15:50:42 +0100 Subject: [PATCH] ext4: print file system UUID on mount, remount and unmount The device names are not necessarily consistent across reboots which can make it more difficult to identify the right file system when tracking down issues using system logs. Print file system UUID string on every mount, remount and unmount to make this task easier. This is similar to the functionality recently propsed for XFS. Signed-off-by: Lukas Czerner Cc: Lukas Herbolt Reviewed-by: Darrick J. Wong Link: https://lore.kernel.org/r/20221108145042.85770-1-lczerner@redhat.com Signed-off-by: Theodore Ts'o --- fs/ext4/super.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9185131e01e57..f5e6919ea650a 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1206,7 +1206,8 @@ static void ext4_put_super(struct super_block *sb) ext4_unregister_sysfs(sb); if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) - ext4_msg(sb, KERN_INFO, "unmounting filesystem."); + ext4_msg(sb, KERN_INFO, "unmounting filesystem %pU.", + &sb->s_uuid); ext4_unregister_li_request(sb); ext4_quota_off_umount(sb); @@ -5655,8 +5656,9 @@ static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) descr = "out journal"; if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) - ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " - "Quota mode: %s.", descr, ext4_quota_mode(sb)); + ext4_msg(sb, KERN_INFO, "mounted filesystem %pU with%s. " + "Quota mode: %s.", &sb->s_uuid, descr, + ext4_quota_mode(sb)); /* Update the s_overhead_clusters if necessary */ ext4_update_overhead(sb, false); @@ -6611,8 +6613,8 @@ static int ext4_reconfigure(struct fs_context *fc) if (ret < 0) return ret; - ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", - ext4_quota_mode(sb)); + ext4_msg(sb, KERN_INFO, "re-mounted %pU. Quota mode: %s.", + &sb->s_uuid, ext4_quota_mode(sb)); return 0; } -- 2.30.2