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authorOmar Sandoval <osandov@fb.com>2015-06-19 21:52:50 +0300
committerChris Mason <clm@fb.com>2015-08-09 17:34:26 +0300
commitb4ee1782686d5b7a97826d67fdeaefaedbca23ce (patch)
tree74da39569b9efe1f48cb1c14bd72617f54128cef /fs/btrfs/scrub.c
parent7cb2c4202ed5730ecbf13c5d34c2cadff4cbe88f (diff)
downloadlinux-b4ee1782686d5b7a97826d67fdeaefaedbca23ce.tar.xz
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/scrub.c')
-rw-r--r--fs/btrfs/scrub.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index a12c450e55fa..038162456cfa 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -2720,8 +2720,7 @@ static void scrub_parity_check_and_repair(struct scrub_parity *sparity)
goto rbio_out;
list_for_each_entry(spage, &sparity->spages, list)
- raid56_parity_add_scrub_pages(rbio, spage->page,
- spage->logical);
+ raid56_add_scrub_pages(rbio, spage->page, spage->logical);
scrub_pending_bio_inc(sctx);
raid56_parity_submit_scrub_rbio(rbio);