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Commit 2b19a1fe authored by Liu Bo's avatar Liu Bo Committed by David Sterba
Browse files

Btrfs: helper for ops that requires full stripe 



This adds a helper to show directly whether ops require full stripe.

Reviewed-by: default avatarQu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 6fad823f

fs/btrfs/volumes.c

+10 −8
Original line number Diff line number Diff line
@@ -5627,6 +5627,11 @@ static void handle_ops_on_dev_replace(enum btrfs_map_op op, 
	*bbio_ret = bbio;

}



static bool need_full_stripe(enum btrfs_map_op op)

{

	return (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS);

}



static int __btrfs_map_block(struct btrfs_fs_info *fs_info,

			     enum btrfs_map_op op,

			     u64 logical, u64 *length,
@@ -5729,8 +5734,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		btrfs_dev_replace_set_lock_blocking(dev_replace);



	if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 &&

	    op != BTRFS_MAP_WRITE && op != BTRFS_MAP_GET_READ_MIRRORS &&

	    dev_replace->tgtdev != NULL) {

	    !need_full_stripe(op) && dev_replace->tgtdev != NULL) {

		ret = get_extra_mirror_from_replace(fs_info, logical, *length,

						    dev_replace->srcdev->devid,

						    &mirror_num,
@@ -5863,10 +5867,8 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		bbio->tgtdev_map = (int *)(bbio->stripes + num_alloc_stripes);



	/* build raid_map */

	if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK &&

	    need_raid_map &&

	    ((op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS) ||

	    mirror_num > 1)) {

	if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK && need_raid_map &&

	    (need_full_stripe(op) || mirror_num > 1)) {

		u64 tmp;

		unsigned rot;
@@ -5901,14 +5903,14 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		stripe_index++;

	}



	if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)

	if (need_full_stripe(op))

		max_errors = btrfs_chunk_max_errors(map);



	if (bbio->raid_map)

		sort_parity_stripes(bbio, num_stripes);



	if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL &&

	    (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)) {

	    need_full_stripe(op)) {

		handle_ops_on_dev_replace(op, &bbio, dev_replace, &num_stripes,

					  &max_errors);

	}