On Tue, Nov 24, 2015 at 03:57:14PM -0700, Andreas Dilger wrote:
> From: Jim Garlick <garlick@xxxxxxxx>
>
> Running tune2fs on a filesystem with an unrecovered journal can
> cause the tune2fs settings changes in the superblock to be reverted
> when the journal is replayed if it contains an uncommitted copy of
> the superblock. Print a warning if this is detected so that the
> user isn't surprised if it happens.
>
> Signed-off-by: Jim Garlick <garlick@xxxxxxxx>
> Signed-off-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>
> ---
> misc/tune2fs.c | 12 ++++++++++++
> 1 files changed, 12 insertions(+), 0 deletions(-)
>
> diff --git a/misc/tune2fs.c b/misc/tune2fs.c
> index cd1d17f..fcb963a 100644
> --- a/misc/tune2fs.c
> +++ b/misc/tune2fs.c
> @@ -2397,6 +2397,7 @@ retry_open:
> ext2fs_mark_super_dirty(fs);
> printf(_("Setting stripe width to %d\n"), stripe_width);
> }
> +
> if (ext_mount_opts) {
> strncpy((char *)(fs->super->s_mount_opts), ext_mount_opts,
> sizeof(fs->super->s_mount_opts));
> @@ -2406,6 +2407,17 @@ retry_open:
> ext_mount_opts);
> free(ext_mount_opts);
> }
> +
> + /* Warn if file system needs recovery and it is opened for writing. */
> + if ((open_flag & EXT2_FLAG_RW) && !(mount_flags & EXT2_MF_MOUNTED) &&
> + (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
> + (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER)) {
ext2fs_has_feature_journal(sb) &&
ext2fs_has_feature_journal_needs_recovery(sb)
> + fprintf(stderr,
> + _("Warning: needs_recovery flag is set. You may wish\n"
> + "replay the journal then rerun this command, or any\n"
"You may wish to replay the journal..."
> + "changes may be overwritten by journal recovery.\n"));
I wonder if we ought simply to replay the journal in this situation, since
debugfs/fuse2fs can do it.
...or at least tell the user how to replay? ("e2fsck -E journal_only"/mount)
--D
> + }
> +
> free(device_name);
> remove_error_table(&et_ext2_error_table);
>
> --
> 1.7.3.4
>
> --
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