diff options
Diffstat (limited to 'drivers/md/raid5-cache.c')
| -rw-r--r-- | drivers/md/raid5-cache.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index 6479f15a5434..ea1480392eba 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -507,6 +507,24 @@ void r5l_write_stripe_run(struct r5l_log *log) mutex_unlock(&log->io_mutex); } +int r5l_handle_flush_request(struct r5l_log *log, struct bio *bio) +{ + if (!log) + return -ENODEV; + /* + * we flush log disk cache first, then write stripe data to raid disks. + * So if bio is finished, the log disk cache is flushed already. The + * recovery guarantees we can recovery the bio from log disk, so we + * don't need to flush again + */ + if (bio->bi_iter.bi_size == 0) { + bio_endio(bio); + return 0; + } + bio->bi_rw &= ~REQ_FLUSH; + return -EAGAIN; +} + /* This will run after log space is reclaimed */ static void r5l_run_no_space_stripes(struct r5l_log *log) { |