diff options
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index ffc13c4d7e63..c9590a8e1425 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -264,6 +264,7 @@ struct stripe_head_state { int syncing, expanding, expanded, replacing; int locked, uptodate, to_read, to_write, failed, written; int to_fill, compute, req_compute, non_overwrite; + int injournal; int failed_num[2]; int p_failed, q_failed; int dec_preread_active; @@ -313,6 +314,11 @@ enum r5dev_flags { */ R5_Discard, /* Discard the stripe */ R5_SkipCopy, /* Don't copy data from bio to stripe cache */ + R5_InJournal, /* data being written is in the journal device. + * if R5_InJournal is set for parity pd_idx, all the + * data and parity being written are in the journal + * device + */ }; /* @@ -345,7 +351,23 @@ enum { STRIPE_BITMAP_PENDING, /* Being added to bitmap, don't add * to batch yet. */ - STRIPE_LOG_TRAPPED, /* trapped into log */ + STRIPE_LOG_TRAPPED, /* trapped into log (see raid5-cache.c) + * this bit is used in two scenarios: + * + * 1. write-out phase + * set in first entry of r5l_write_stripe + * clear in second entry of r5l_write_stripe + * used to bypass logic in handle_stripe + * + * 2. caching phase + * set in r5c_try_caching_write() + * clear when journal write is done + * used to initiate r5c_cache_data() + * also used to bypass logic in handle_stripe + */ + STRIPE_R5C_CACHING, /* the stripe is in caching phase + * see more detail in the raid5-cache.c + */ }; #define STRIPE_EXPAND_SYNC_FLAGS \ @@ -710,4 +732,11 @@ 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); +extern bool r5c_is_writeback(struct r5l_log *log); +extern int +r5c_try_caching_write(struct r5conf *conf, struct stripe_head *sh, + struct stripe_head_state *s, int disks); +extern void +r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh, + struct stripe_head_state *s); #endif |