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dm integrity: fix recalculation when moving from journal mode to bitmap mode 

If we resume a device in bitmap mode and the on-disk format is in journal
mode, we must recalculate anything above ic->sb->recalc_sector. Otherwise,
there would be non-recalculated blocks which would cause I/O errors.

Fixes: 468dfca38b ("dm integrity: add a bitmap mode")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2020-02-07 11:42:30 -05:00 committed by Mike Snitzer
parent 47ace7e012
commit d5bdf66108
1 changed files with 12 additions and 5 deletions
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17
drivers/md/dm-integrity.c
View File

@ -2888,17 +2888,24 @@ static void dm_integrity_resume(struct dm_target *ti)
} else {
replay_journal(ic);
if (ic->mode == 'B') {
int mode;
ic->sb->flags |= cpu_to_le32(SB_FLAG_DIRTY_BITMAP);
ic->sb->log2_blocks_per_bitmap_bit = ic->log2_blocks_per_bitmap_bit;
r = sync_rw_sb(ic, REQ_OP_WRITE, REQ_FUA);
if (unlikely(r))
dm_integrity_io_error(ic, "writing superblock", r);
mode = ic->recalculate_flag ? BITMAP_OP_SET : BITMAP_OP_CLEAR;
block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, mode);
block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, mode);
block_bitmap_op(ic, ic->may_write_bitmap, 0, ic->provided_data_sectors, mode);
block_bitmap_op(ic, ic->journal, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR);
block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR);
block_bitmap_op(ic, ic->may_write_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR);
if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING) &&
le64_to_cpu(ic->sb->recalc_sector) < ic->provided_data_sectors) {
block_bitmap_op(ic, ic->journal, le64_to_cpu(ic->sb->recalc_sector),
ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET);
block_bitmap_op(ic, ic->recalc_bitmap, le64_to_cpu(ic->sb->recalc_sector),
ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET);
block_bitmap_op(ic, ic->may_write_bitmap, le64_to_cpu(ic->sb->recalc_sector),
ic->provided_data_sectors - le64_to_cpu(ic->sb->recalc_sector), BITMAP_OP_SET);
}
rw_journal_sectors(ic, REQ_OP_WRITE, REQ_FUA | REQ_SYNC, 0,
ic->n_bitmap_blocks * (BITMAP_BLOCK_SIZE >> SECTOR_SHIFT), NULL);
}