diff options
Diffstat (limited to 'drivers/md/dm-cache-target.c')
| -rw-r--r-- | drivers/md/dm-cache-target.c | 58 |
1 files changed, 37 insertions, 21 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 4733105a130f..bb511cb89f83 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -525,9 +525,11 @@ static unsigned int lock_level(struct bio *bio) READ_WRITE_LOCK_LEVEL; } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * Per bio data - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ static struct per_bio_data *get_per_bio_data(struct bio *bio) { @@ -706,9 +708,11 @@ static bool is_discarded_oblock(struct cache *cache, dm_oblock_t b) return r; } -/*---------------------------------------------------------------- +/* + * ------------------------------------------------------------- * Remapping - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ static void remap_to_origin(struct cache *cache, struct bio *bio) { bio_set_dev(bio, cache->origin_dev->bdev); @@ -834,9 +838,11 @@ static void remap_to_origin_and_cache(struct cache *cache, struct bio *bio, remap_to_cache(cache, bio, cblock); } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * Failure modes - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ static enum cache_metadata_mode get_cache_mode(struct cache *cache) { return cache->features.mode; @@ -973,13 +979,14 @@ static void update_stats(struct cache_stats *stats, enum policy_operation op) } } -/*---------------------------------------------------------------- +/* + *--------------------------------------------------------------------- * Migration processing * * Migration covers moving data from the origin device to the cache, or * vice versa. - *--------------------------------------------------------------*/ - + *--------------------------------------------------------------------- + */ static void inc_io_migrations(struct cache *cache) { atomic_inc(&cache->nr_io_migrations); @@ -1431,9 +1438,11 @@ static int mg_start(struct cache *cache, struct policy_work *op, struct bio *bio return mg_lock_writes(mg); } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * invalidation processing - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ static void invalidate_complete(struct dm_cache_migration *mg, bool success) { @@ -1554,9 +1563,11 @@ static int invalidate_start(struct cache *cache, dm_cblock_t cblock, return invalidate_lock(mg); } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * bio processing - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ enum busy { IDLE, @@ -1764,9 +1775,11 @@ static bool process_discard_bio(struct cache *cache, struct bio *bio) { dm_dblock_t b, e; - // FIXME: do we need to lock the region? Or can we just assume the - // user wont be so foolish as to issue discard concurrently with - // other IO? + /* + * FIXME: do we need to lock the region? Or can we just assume the + * user wont be so foolish as to issue discard concurrently with + * other IO? + */ calc_discard_block_range(cache, bio, &b, &e); while (b != e) { set_discard(cache, b); @@ -1812,10 +1825,11 @@ static void process_deferred_bios(struct work_struct *ws) schedule_commit(&cache->committer); } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * Main worker loop - *--------------------------------------------------------------*/ - + *-------------------------------------------------------------- + */ static void requeue_deferred_bios(struct cache *cache) { struct bio *bio; @@ -1871,9 +1885,11 @@ static void check_migrations(struct work_struct *ws) } } -/*---------------------------------------------------------------- +/* + *-------------------------------------------------------------- * Target methods - *--------------------------------------------------------------*/ + *-------------------------------------------------------------- + */ /* * This function gets called on the error paths of the constructor, so we |