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btrfs: open code need_full_stripe conditions

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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>
This commit is contained in:
Christoph Hellwig 2023-05-31 06:17:39 +02:00 committed by David Sterba
parent 723b8bb17e
commit 8680e58761
1 changed files with 12 additions and 17 deletions
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29
fs/btrfs/volumes.c
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@ -6173,11 +6173,6 @@ static void handle_ops_on_dev_replace(enum btrfs_map_op op,
bioc->replace_nr_stripes = nr_extra_stripes;
}
static bool need_full_stripe(enum btrfs_map_op op)
{
return (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS);
}
static u64 btrfs_max_io_len(struct map_lookup *map, enum btrfs_map_op op,
u64 offset, u32 *stripe_nr, u64 *stripe_offset,
u64 *full_stripe_start)
@ -6290,21 +6285,21 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
if (map->type & BTRFS_BLOCK_GROUP_RAID0) {
stripe_index = stripe_nr % map->num_stripes;
stripe_nr /= map->num_stripes;
if (!need_full_stripe(op))
if (op == BTRFS_MAP_READ)
mirror_num = 1;
} else if (map->type & BTRFS_BLOCK_GROUP_RAID1_MASK) {
if (need_full_stripe(op))
if (op != BTRFS_MAP_READ) {
num_stripes = map->num_stripes;
else if (mirror_num)
} else if (mirror_num) {
stripe_index = mirror_num - 1;
else {
} else {
stripe_index = find_live_mirror(fs_info, map, 0,
dev_replace_is_ongoing);
mirror_num = stripe_index + 1;
}
} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {
if (need_full_stripe(op)) {
if (op != BTRFS_MAP_READ) {
num_stripes = map->num_stripes;
} else if (mirror_num) {
stripe_index = mirror_num - 1;
@ -6318,7 +6313,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
stripe_index = (stripe_nr % factor) * map->sub_stripes;
stripe_nr /= factor;
if (need_full_stripe(op))
if (op != BTRFS_MAP_READ)
num_stripes = map->sub_stripes;
else if (mirror_num)
stripe_index += mirror_num - 1;
@ -6331,7 +6326,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
}
} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
if (need_raid_map && (need_full_stripe(op) || mirror_num > 1)) {
if (need_raid_map && (op != BTRFS_MAP_READ || mirror_num > 1)) {
/*
* Push stripe_nr back to the start of the full stripe
* For those cases needing a full stripe, @stripe_nr
@ -6366,7 +6361,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
/* We distribute the parity blocks across stripes */
stripe_index = (stripe_nr + stripe_index) % map->num_stripes;
if (!need_full_stripe(op) && mirror_num <= 1)
if (op == BTRFS_MAP_READ && mirror_num <= 1)
mirror_num = 1;
}
} else {
@ -6406,7 +6401,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
*/
if (smap && num_alloc_stripes == 1 &&
!((map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) && mirror_num > 1) &&
(!need_full_stripe(op) || !dev_replace_is_ongoing ||
(op == BTRFS_MAP_READ || !dev_replace_is_ongoing ||
!dev_replace->tgtdev)) {
set_io_stripe(smap, map, stripe_index, stripe_offset, stripe_nr);
*mirror_num_ret = mirror_num;
@ -6430,7 +6425,7 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
* It's still mostly the same as other profiles, just with extra rotation.
*/
if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK && need_raid_map &&
(need_full_stripe(op) || mirror_num > 1)) {
(op != BTRFS_MAP_READ || mirror_num > 1)) {
/*
* For RAID56 @stripe_nr is already the number of full stripes
* before us, which is also the rotation value (needs to modulo
@ -6457,11 +6452,11 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
}
}
if (need_full_stripe(op))
if (op != BTRFS_MAP_READ)
max_errors = btrfs_chunk_max_errors(map);
if (dev_replace_is_ongoing && dev_replace->tgtdev != NULL &&
need_full_stripe(op)) {
op != BTRFS_MAP_READ) {
handle_ops_on_dev_replace(op, bioc, dev_replace, logical,
&num_stripes, &max_errors);
}