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| author | Shaohua Li <shli@fb.com> | 2015-10-08 21:54:08 -0700 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-11-01 13:48:29 +1100 |
| commit | 6e74a9cfb5a55b0a4214809321b67d7065e55555 (patch) | |
| tree | 30c3ed87535416ea84cc9698c4a00999598f9bbc /drivers/md/raid5.h | |
| parent | c2bb6242ece5a2a0b6bd415c1d58babe83e971a8 (diff) | |
| download | linux-6e74a9cfb5a55b0a4214809321b67d7065e55555.tar.bz2 | |
raid5-cache: IO error handling
There are 3 places the raid5-cache dispatches IO. The discard IO error
doesn't matter, so we ignore it. The superblock write IO error can be
handled in MD core. The remaining are log write and flush. When the IO
error happens, we mark log disk faulty and fail all write IO. Read IO is
still allowed to run. Userspace will get a notification too and
corresponding daemon can choose setting raid array readonly for example.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 1ab534c909fe..a415e1cd39b8 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -272,6 +272,7 @@ struct stripe_head_state { struct bio_list return_bi; struct md_rdev *blocked_rdev; int handle_bad_blocks; + int log_failed; }; /* Flags for struct r5dev.flags */ @@ -631,4 +632,5 @@ extern void r5l_flush_stripe_to_raid(struct r5l_log *log); extern void r5l_stripe_write_finished(struct stripe_head *sh); extern int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio); extern void r5l_quiesce(struct r5l_log *log, int state); +extern bool r5l_log_disk_error(struct r5conf *conf); #endif |