Commit 79add3a3 authored Nov 08, 2012 by Lukas Czerner Committed by Theodore Ts'o Nov 08, 2012

ext4: notify when discard is not supported



Notify user when mounting the file system with -o discard option, but
the device does not support discard. Obviously we do not want to fail
the mount or disable the options, because the underlying device might
change in future even without file system remount.

Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

parent d8ec0c39

fs/ext4/super.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -4015,6 +4015,14 @@ no_journal:
		}
		#endif /* CONFIG_QUOTA */

		if (test_opt(sb, DISCARD)) {
		struct request_queue *q = bdev_get_queue(sb->s_bdev);
		if (!blk_queue_discard(q))
		ext4_msg(sb, KERN_WARNING,
		"mounting with \"discard\" option, but "
		"the device does not support discard");
		}

		ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. "
		"Opts: %s%s%s", descr, sbi->s_es->s_mount_opts,
		*sbi->s_es->s_mount_opts ? "; " : "", orig_data);

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