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dm raid: support to change bitmap region size
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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1 changed files with 11 additions and 0 deletions
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@ -217,6 +217,7 @@ struct raid_set {
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int delta_disks;
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int data_offset;
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int raid10_copies;
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int requested_bitmap_chunk_sectors;
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struct mddev md;
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struct raid_type *raid_type;
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@ -1277,6 +1278,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
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}
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region_size = value;
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rs->requested_bitmap_chunk_sectors = value;
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} else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_RAID10_COPIES))) {
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if (test_and_set_bit(__CTR_FLAG_RAID10_COPIES, &rs->ctr_flags)) {
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rs->ti->error = "Only one raid10_copies argument pair allowed";
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@ -3401,6 +3403,15 @@ static int raid_preresume(struct dm_target *ti)
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if (r)
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return r;
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/* Resize bitmap to adjust to changed region size (aka MD bitmap chunksize) */
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if (test_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags) &&
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mddev->bitmap_info.chunksize != to_bytes(rs->requested_bitmap_chunk_sectors)) {
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r = bitmap_resize(mddev->bitmap, mddev->dev_sectors,
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to_bytes(rs->requested_bitmap_chunk_sectors), 0);
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if (r)
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DMERR("Failed to resize bitmap");
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}
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/* Check for any resize/reshape on @rs and adjust/initiate */
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/* Be prepared for mddev_resume() in raid_resume() */
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set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
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