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btrfs: remove unused raid56 functions which were dedicated for scrub

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Since the scrub rework, the following RAID56 functions are no longer
called:

- raid56_add_scrub_pages()
- raid56_alloc_missing_rbio()
- raid56_submit_missing_rbio()

Those functions are all utilized by scrub to handle missing device cases
for RAID56.

However the new scrub code handle them in a completely different way:

- If it's data stripe, go recovery path through btrfs_submit_bio()
- If it's P/Q stripe, it would be handled through
  raid56_parity_submit_scrub_rbio()
  And that function would handle dev-replace and repair properly.

Thus we can safely remove those functions.

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 2023-04-12 14:47:50 +08:00 committed by David Sterba
parent 13a62fd997
commit aca43fe839
2 changed files with 0 additions and 54 deletions
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47
fs/btrfs/raid56.c
View File

@ -2376,23 +2376,6 @@ struct btrfs_raid_bio *raid56_parity_alloc_scrub_rbio(struct bio *bio,
return rbio;
}
/* Used for both parity scrub and missing. */
void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
unsigned int pgoff, u64 logical)
{
const u32 sectorsize = rbio->bioc->fs_info->sectorsize;
int stripe_offset;
int index;
ASSERT(logical >= rbio->bioc->full_stripe_logical);
ASSERT(logical + sectorsize <= rbio->bioc->full_stripe_logical +
BTRFS_STRIPE_LEN * rbio->nr_data);
stripe_offset = (int)(logical - rbio->bioc->full_stripe_logical);
index = stripe_offset / sectorsize;
rbio->bio_sectors[index].page = page;
rbio->bio_sectors[index].pgoff = pgoff;
}
/*
* We just scrub the parity that we have correct data on the same horizontal,
* so we needn't allocate all pages for all the stripes.
@ -2764,33 +2747,3 @@ void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio)
if (!lock_stripe_add(rbio))
start_async_work(rbio, scrub_rbio_work_locked);
}
/* The following code is used for dev replace of a missing RAID 5/6 device. */
struct btrfs_raid_bio *
raid56_alloc_missing_rbio(struct bio *bio, struct btrfs_io_context *bioc)
{
struct btrfs_fs_info *fs_info = bioc->fs_info;
struct btrfs_raid_bio *rbio;
rbio = alloc_rbio(fs_info, bioc);
if (IS_ERR(rbio))
return NULL;
rbio->operation = BTRFS_RBIO_REBUILD_MISSING;
bio_list_add(&rbio->bio_list, bio);
/*
* This is a special bio which is used to hold the completion handler
* and make the scrub rbio is similar to the other types
*/
ASSERT(!bio->bi_iter.bi_size);
set_rbio_range_error(rbio, bio);
return rbio;
}
void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio)
{
start_async_work(rbio, recover_rbio_work);
}

7
fs/btrfs/raid56.h
View File

@ -187,19 +187,12 @@ void raid56_parity_recover(struct bio *bio, struct btrfs_io_context *bioc,
int mirror_num);
void raid56_parity_write(struct bio *bio, struct btrfs_io_context *bioc);
void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page,
unsigned int pgoff, u64 logical);
struct btrfs_raid_bio *raid56_parity_alloc_scrub_rbio(struct bio *bio,
struct btrfs_io_context *bioc,
struct btrfs_device *scrub_dev,
unsigned long *dbitmap, int stripe_nsectors);
void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio);
struct btrfs_raid_bio *
raid56_alloc_missing_rbio(struct bio *bio, struct btrfs_io_context *bioc);
void raid56_submit_missing_rbio(struct btrfs_raid_bio *rbio);
int btrfs_alloc_stripe_hash_table(struct btrfs_fs_info *info);
void btrfs_free_stripe_hash_table(struct btrfs_fs_info *info);