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btrfs: open code need_full_stripe conditions
need_full_stripe is just a somewhat complicated way to say "op != BTRFS_MAP_READ". Just spell that explicit check out, which makes a lot of the code currently using the helper easier to understand. Reviewed-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -6173,11 +6173,6 @@ static void handle_ops_on_dev_replace(enum btrfs_map_op op,
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bioc->replace_nr_stripes = nr_extra_stripes;
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}
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static bool need_full_stripe(enum btrfs_map_op op)
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{
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return (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS);
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}
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static u64 btrfs_max_io_len(struct map_lookup *map, enum btrfs_map_op op,
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u64 offset, u32 *stripe_nr, u64 *stripe_offset,
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u64 *full_stripe_start)
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@ -6290,21 +6285,21 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
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stripe_index = stripe_nr % map->num_stripes;
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stripe_nr /= map->num_stripes;
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if (!need_full_stripe(op))
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if (op == BTRFS_MAP_READ)
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mirror_num = 1;
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} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
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if (need_full_stripe(op))
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if (op != BTRFS_MAP_READ) {
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num_stripes = map->num_stripes;
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else if (mirror_num)
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} else if (mirror_num) {
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stripe_index = mirror_num - 1;
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else {
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} else {
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stripe_index = find_live_mirror(fs_info, map, 0,
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dev_replace_is_ongoing);
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mirror_num = stripe_index + 1;
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}
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} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
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if (need_full_stripe(op)) {
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if (op != BTRFS_MAP_READ) {
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num_stripes = map->num_stripes;
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} else if (mirror_num) {
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stripe_index = mirror_num - 1;
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@ -6318,7 +6313,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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stripe_index = (stripe_nr % factor) * map->sub_stripes;
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stripe_nr /= factor;
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if (need_full_stripe(op))
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if (op != BTRFS_MAP_READ)
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num_stripes = map->sub_stripes;
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else if (mirror_num)
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stripe_index += mirror_num - 1;
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@ -6331,7 +6326,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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}
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} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
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if (need_raid_map && (need_full_stripe(op) || mirror_num > 1)) {
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if (need_raid_map && (op != BTRFS_MAP_READ || mirror_num > 1)) {
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/*
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* Push stripe_nr back to the start of the full stripe
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* For those cases needing a full stripe, @stripe_nr
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@ -6366,7 +6361,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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/* We distribute the parity blocks across stripes */
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stripe_index = (stripe_nr + stripe_index) % map->num_stripes;
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if (!need_full_stripe(op) && mirror_num <= 1)
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if (op == BTRFS_MAP_READ && mirror_num <= 1)
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mirror_num = 1;
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}
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} else {
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@ -6406,7 +6401,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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*/
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if (smap && num_alloc_stripes == 1 &&
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!((map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) && mirror_num > 1) &&
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(!need_full_stripe(op) || !dev_replace_is_ongoing ||
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(op == BTRFS_MAP_READ || !dev_replace_is_ongoing ||
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!dev_replace->tgtdev)) {
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set_io_stripe(smap, map, stripe_index, stripe_offset, stripe_nr);
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*mirror_num_ret = mirror_num;
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@ -6430,7 +6425,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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* It's still mostly the same as other profiles, just with extra rotation.
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*/
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if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK && need_raid_map &&
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(need_full_stripe(op) || mirror_num > 1)) {
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(op != BTRFS_MAP_READ || mirror_num > 1)) {
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/*
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* For RAID56 @stripe_nr is already the number of full stripes
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* before us, which is also the rotation value (needs to modulo
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@ -6457,11 +6452,11 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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}
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}
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if (need_full_stripe(op))
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if (op != BTRFS_MAP_READ)
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max_errors = btrfs_chunk_max_errors(map);
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if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL &&
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need_full_stripe(op)) {
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op != BTRFS_MAP_READ) {
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handle_ops_on_dev_replace(op, bioc, dev_replace, logical,
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&num_stripes, &max_errors);
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}
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