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Diffstat (limited to 'drivers/md/dm-cache-target.c')
-rw-r--r--drivers/md/dm-cache-target.c59
1 files changed, 29 insertions, 30 deletions
diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index e04c61e0839e..9c689b34e6e7 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -179,6 +179,7 @@ enum cache_io_mode {
struct cache_features {
enum cache_metadata_mode mode;
enum cache_io_mode io_mode;
+ unsigned metadata_version;
};
struct cache_stats {
@@ -248,7 +249,7 @@ struct cache {
/*
* Fields for converting from sectors to blocks.
*/
- uint32_t sectors_per_block;
+ sector_t sectors_per_block;
int sectors_per_block_shift;
spinlock_t lock;
@@ -787,8 +788,7 @@ static void check_if_tick_bio_needed(struct cache *cache, struct bio *bio)
struct per_bio_data *pb = get_per_bio_data(bio, pb_data_size);
spin_lock_irqsave(&cache->lock, flags);
- if (cache->need_tick_bio &&
- !(bio->bi_opf & (REQ_FUA | REQ_PREFLUSH)) &&
+ if (cache->need_tick_bio && !op_is_flush(bio->bi_opf) &&
bio_op(bio) != REQ_OP_DISCARD) {
pb->tick = true;
cache->need_tick_bio = false;
@@ -828,11 +828,6 @@ static dm_oblock_t get_bio_block(struct cache *cache, struct bio *bio)
return to_oblock(block_nr);
}
-static int bio_triggers_commit(struct cache *cache, struct bio *bio)
-{
- return bio->bi_opf & (REQ_PREFLUSH | REQ_FUA);
-}
-
/*
* You must increment the deferred set whilst the prison cell is held. To
* encourage this, we ask for 'cell' to be passed in.
@@ -884,7 +879,7 @@ static void issue(struct cache *cache, struct bio *bio)
{
unsigned long flags;
- if (!bio_triggers_commit(cache, bio)) {
+ if (!op_is_flush(bio->bi_opf)) {
accounted_request(cache, bio);
return;
}
@@ -1069,8 +1064,7 @@ static void dec_io_migrations(struct cache *cache)
static bool discard_or_flush(struct bio *bio)
{
- return bio_op(bio) == REQ_OP_DISCARD ||
- bio->bi_opf & (REQ_PREFLUSH | REQ_FUA);
+ return bio_op(bio) == REQ_OP_DISCARD || op_is_flush(bio->bi_opf);
}
static void __cell_defer(struct cache *cache, struct dm_bio_prison_cell *cell)
@@ -2291,7 +2285,7 @@ static void do_waker(struct work_struct *ws)
static int is_congested(struct dm_dev *dev, int bdi_bits)
{
struct request_queue *q = bdev_get_queue(dev->bdev);
- return bdi_congested(&q->backing_dev_info, bdi_bits);
+ return bdi_congested(q->backing_dev_info, bdi_bits);
}
static int cache_is_congested(struct dm_target_callbacks *cb, int bdi_bits)
@@ -2541,13 +2535,14 @@ static void init_features(struct cache_features *cf)
{
cf->mode = CM_WRITE;
cf->io_mode = CM_IO_WRITEBACK;
+ cf->metadata_version = 1;
}
static int parse_features(struct cache_args *ca, struct dm_arg_set *as,
char **error)
{
static struct dm_arg _args[] = {
- {0, 1, "Invalid number of cache feature arguments"},
+ {0, 2, "Invalid number of cache feature arguments"},
};
int r;
@@ -2573,6 +2568,9 @@ static int parse_features(struct cache_args *ca, struct dm_arg_set *as,
else if (!strcasecmp(arg, "passthrough"))
cf->io_mode = CM_IO_PASSTHROUGH;
+ else if (!strcasecmp(arg, "metadata2"))
+ cf->metadata_version = 2;
+
else {
*error = "Unrecognised cache feature requested";
return -EINVAL;
@@ -2827,7 +2825,8 @@ static int cache_create(struct cache_args *ca, struct cache **result)
cmd = dm_cache_metadata_open(cache->metadata_dev->bdev,
ca->block_size, may_format,
- dm_cache_policy_get_hint_size(cache->policy));
+ dm_cache_policy_get_hint_size(cache->policy),
+ ca->features.metadata_version);
if (IS_ERR(cmd)) {
*error = "Error creating metadata object";
r = PTR_ERR(cmd);
@@ -3172,21 +3171,16 @@ static int cache_end_io(struct dm_target *ti, struct bio *bio, int error)
static int write_dirty_bitset(struct cache *cache)
{
- unsigned i, r;
+ int r;
if (get_cache_mode(cache) >= CM_READ_ONLY)
return -EINVAL;
- for (i = 0; i < from_cblock(cache->cache_size); i++) {
- r = dm_cache_set_dirty(cache->cmd, to_cblock(i),
- is_dirty(cache, to_cblock(i)));
- if (r) {
- metadata_operation_failed(cache, "dm_cache_set_dirty", r);
- return r;
- }
- }
+ r = dm_cache_set_dirty_bits(cache->cmd, from_cblock(cache->cache_size), cache->dirty_bitset);
+ if (r)
+ metadata_operation_failed(cache, "dm_cache_set_dirty_bits", r);
- return 0;
+ return r;
}
static int write_discard_bitset(struct cache *cache)
@@ -3547,11 +3541,11 @@ static void cache_status(struct dm_target *ti, status_type_t type,
residency = policy_residency(cache->policy);
- DMEMIT("%u %llu/%llu %u %llu/%llu %u %u %u %u %u %u %lu ",
+ DMEMIT("%u %llu/%llu %llu %llu/%llu %u %u %u %u %u %u %lu ",
(unsigned)DM_CACHE_METADATA_BLOCK_SIZE,
(unsigned long long)(nr_blocks_metadata - nr_free_blocks_metadata),
(unsigned long long)nr_blocks_metadata,
- cache->sectors_per_block,
+ (unsigned long long)cache->sectors_per_block,
(unsigned long long) from_cblock(residency),
(unsigned long long) from_cblock(cache->cache_size),
(unsigned) atomic_read(&cache->stats.read_hit),
@@ -3562,14 +3556,19 @@ static void cache_status(struct dm_target *ti, status_type_t type,
(unsigned) atomic_read(&cache->stats.promotion),
(unsigned long) atomic_read(&cache->nr_dirty));
+ if (cache->features.metadata_version == 2)
+ DMEMIT("2 metadata2 ");
+ else
+ DMEMIT("1 ");
+
if (writethrough_mode(&cache->features))
- DMEMIT("1 writethrough ");
+ DMEMIT("writethrough ");
else if (passthrough_mode(&cache->features))
- DMEMIT("1 passthrough ");
+ DMEMIT("passthrough ");
else if (writeback_mode(&cache->features))
- DMEMIT("1 writeback ");
+ DMEMIT("writeback ");
else {
DMERR("%s: internal error: unknown io mode: %d",
@@ -3817,7 +3816,7 @@ static void cache_io_hints(struct dm_target *ti, struct queue_limits *limits)
static struct target_type cache_target = {
.name = "cache",
- .version = {1, 9, 0},
+ .version = {1, 10, 0},
.module = THIS_MODULE,
.ctr = cache_ctr,
.dtr = cache_dtr,
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