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btrfs: factor out stripe length calculation into a helper

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Currently there are two locations which need to calculate the real
length of a stripe (which can be at the end of a chunk, and the chunk
size may not always be 64K aligned).

Factor them into a helper as we're going to have a third user soon.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2024-03-08 13:40:30 +10:30 committed by David Sterba
parent b8e947e9f6
commit 33eb1e5db3
1 changed files with 10 additions and 6 deletions
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16
fs/btrfs/scrub.c
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@ -1648,14 +1648,20 @@ static void scrub_reset_stripe(struct scrub_stripe *stripe)
}
}
static u32 stripe_length(const struct scrub_stripe *stripe)
{
ASSERT(stripe->bg);
return min(BTRFS_STRIPE_LEN,
stripe->bg->start + stripe->bg->length - stripe->logical);
}
static void scrub_submit_extent_sector_read(struct scrub_ctx *sctx,
struct scrub_stripe *stripe)
{
struct btrfs_fs_info *fs_info = stripe->bg->fs_info;
struct btrfs_bio *bbio = NULL;
unsigned int nr_sectors = min(BTRFS_STRIPE_LEN, stripe->bg->start +
stripe->bg->length - stripe->logical) >>
fs_info->sectorsize_bits;
unsigned int nr_sectors = stripe_length(stripe) >> fs_info->sectorsize_bits;
u64 stripe_len = BTRFS_STRIPE_LEN;
int mirror = stripe->mirror_num;
int i;
@ -1729,9 +1735,7 @@ static void scrub_submit_initial_read(struct scrub_ctx *sctx,
{
struct btrfs_fs_info *fs_info = sctx->fs_info;
struct btrfs_bio *bbio;
unsigned int nr_sectors = min(BTRFS_STRIPE_LEN, stripe->bg->start +
stripe->bg->length - stripe->logical) >>
fs_info->sectorsize_bits;
unsigned int nr_sectors = stripe_length(stripe) >> fs_info->sectorsize_bits;
int mirror = stripe->mirror_num;
ASSERT(stripe->bg);