diff options
| author | Omar Sandoval <osandov@fb.com> | 2015-06-19 11:52:50 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-08-09 07:34:26 -0700 |
| commit | b4ee1782686d5b7a97826d67fdeaefaedbca23ce (patch) | |
| tree | 74da39569b9efe1f48cb1c14bd72617f54128cef /fs/btrfs/raid56.h | |
| parent | 7cb2c4202ed5730ecbf13c5d34c2cadff4cbe88f (diff) | |
Btrfs: add RAID 5/6 BTRFS_RBIO_REBUILD_MISSING operation
The current RAID 5/6 recovery code isn't quite prepared to handle
missing devices. In particular, it expects a bio that we previously
attempted to use in the read path, meaning that it has valid pages
allocated. However, missing devices have a NULL blkdev, and we can't
call bio_add_page() on a bio with a NULL blkdev. We could do manual
manipulation of bio->bi_io_vec, but that's pretty gross. So instead, add
a separate path that allows us to manually add pages to the rbio.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/raid56.h')
| -rw-r--r-- | fs/btrfs/raid56.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/btrfs/raid56.h b/fs/btrfs/raid56.h index 2b5d7977d83b..8b694699d502 100644 --- a/fs/btrfs/raid56.h +++ b/fs/btrfs/raid56.h @@ -48,15 +48,21 @@ int raid56_parity_recover(struct btrfs_root *root, struct bio *bio, int raid56_parity_write(struct btrfs_root *root, struct bio *bio, struct btrfs_bio *bbio, u64 stripe_len); +void raid56_add_scrub_pages(struct btrfs_raid_bio *rbio, struct page *page, + u64 logical); + struct btrfs_raid_bio * raid56_parity_alloc_scrub_rbio(struct btrfs_root *root, struct bio *bio, struct btrfs_bio *bbio, u64 stripe_len, struct btrfs_device *scrub_dev, unsigned long *dbitmap, int stripe_nsectors); -void raid56_parity_add_scrub_pages(struct btrfs_raid_bio *rbio, - struct page *page, u64 logical); void raid56_parity_submit_scrub_rbio(struct btrfs_raid_bio *rbio); +struct btrfs_raid_bio * +raid56_alloc_missing_rbio(struct btrfs_root *root, struct bio *bio, + struct btrfs_bio *bbio, u64 length); +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); #endif |