diff options
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 73c183398e38..35b4c0f0a850 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -226,6 +226,8 @@ struct stripe_head { struct r5l_io_unit *log_io; struct list_head log_list; + sector_t log_start; /* first meta block on the journal */ + struct list_head r5c; /* for r5c_cache->stripe_in_journal */ /** * struct stripe_operations * @target - STRIPE_OP_COMPUTE_BLK target @@ -537,6 +539,27 @@ struct r5worker_group { int stripes_cnt; }; +enum r5_cache_state { + R5_INACTIVE_BLOCKED, /* release of inactive stripes blocked, + * waiting for 25% to be free + */ + R5_ALLOC_MORE, /* It might help to allocate another + * stripe. + */ + R5_DID_ALLOC, /* A stripe was allocated, don't allocate + * more until at least one has been + * released. This avoids flooding + * the cache. + */ + R5C_LOG_TIGHT, /* log device space tight, need to + * prioritize stripes at last_checkpoint + */ + R5C_LOG_CRITICAL, /* log device is running out of space, + * only process stripes that are already + * occupying the log + */ +}; + struct r5conf { struct hlist_head *stripe_hashtbl; /* only protect corresponding hash list and inactive_list */ @@ -636,17 +659,6 @@ struct r5conf { wait_queue_head_t wait_for_stripe; wait_queue_head_t wait_for_overlap; unsigned long cache_state; -#define R5_INACTIVE_BLOCKED 1 /* release of inactive stripes blocked, - * waiting for 25% to be free - */ -#define R5_ALLOC_MORE 2 /* It might help to allocate another - * stripe. - */ -#define R5_DID_ALLOC 4 /* A stripe was allocated, don't allocate - * more until at least one has been - * released. This avoids flooding - * the cache. - */ struct shrinker shrinker; int pool_size; /* number of disks in stripeheads in pool */ spinlock_t device_lock; @@ -752,8 +764,13 @@ extern void r5c_finish_stripe_write_out(struct r5conf *conf, struct stripe_head *sh, struct stripe_head_state *s); extern void r5c_release_extra_page(struct stripe_head *sh); +extern void r5l_wake_reclaim(struct r5l_log *log, sector_t space); extern void r5c_handle_cached_data_endio(struct r5conf *conf, struct stripe_head *sh, int disks, struct bio_list *return_bi); extern int r5c_cache_data(struct r5l_log *log, struct stripe_head *sh, struct stripe_head_state *s); +extern void r5c_make_stripe_write_out(struct stripe_head *sh); +extern void r5c_flush_cache(struct r5conf *conf, int num); +extern void r5c_check_stripe_cache_usage(struct r5conf *conf); +extern void r5c_check_cached_full_stripe(struct r5conf *conf); #endif |