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authorIlya Dryomov <idryomov@gmail.com>2011-04-09 14:27:01 +0300
committerArne Jansen <sensille@gmx.net>2011-05-12 14:48:28 +0200
commit96e369208e65a7d017a52361fd572df41fde8472 (patch)
treeb72e4aafce997d87934a15f3b5594d8d162b1eef /fs/9p/fid.h
parent475f63874d739d7842a56da94687f18d583ae654 (diff)
btrfs scrub: make fixups sync
btrfs scrub - make fixups sync, don't reuse fixup bios Fixups are already sync for csum failures, this patch makes them sync for EIO case as well. Fixups are now sharing pages with the parent sbio - instead of allocating a separate page to do a fixup we grab the page from the sbio buffer. Fixup bios are no longer reused. struct fixup is no longer needed, instead pass [sbio pointer, index]. Originally this was added to look at the possibility of sharing the code between drive swap and scrub, but it actually fixes a serious bug in scrub code where errors that could be corrected were ignored and reported as uncorrectable. btrfs scrub - restore bios properly after media errors The current code reallocates a bio after a media error. This is a temporary measure introduced in v3 after a serious problem related to bio reuse was found in v2 of scrub patchset. Basically we did not reset bv_offset and bv_len fields of the bio_vec structure. They are changed in case I/O error happens, for example, at offset 512 or 1024 into the page. Also bi_flags field wasn't properly setup before reusing the bio. Signed-off-by: Arne Jansen <sensille@gmx.net>
Diffstat (limited to 'fs/9p/fid.h')
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