diff options
author | Mike Snitzer <snitzer@redhat.com> | 2020-09-19 20:09:11 +0300 |
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committer | Mike Snitzer <snitzer@redhat.com> | 2020-09-29 23:33:07 +0300 |
commit | 33bd6f0693857492ab19869d79801437ac1e42ba (patch) | |
tree | 1ccd06964552349271e8a3b713ff190429ce588c | |
parent | 7465d7ac50edb3158c5eb957c5ecd3a5310e1c68 (diff) | |
download | linux-33bd6f0693857492ab19869d79801437ac1e42ba.tar.xz |
dm table: make 'struct dm_table' definition accessible to all of DM core
Move 'struct dm_table' definition from dm-table.c to dm-core.h and
update DM core to access its members directly.
Helps optimize max_io_len() and other methods slightly.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
-rw-r--r-- | drivers/md/dm-core.h | 56 | ||||
-rw-r--r-- | drivers/md/dm-rq.c | 2 | ||||
-rw-r--r-- | drivers/md/dm-table.c | 47 | ||||
-rw-r--r-- | drivers/md/dm.c | 23 | ||||
-rw-r--r-- | drivers/md/dm.h | 3 |
5 files changed, 61 insertions, 70 deletions
diff --git a/drivers/md/dm-core.h b/drivers/md/dm-core.h index c4ef1fceead6..d522093cb39d 100644 --- a/drivers/md/dm-core.h +++ b/drivers/md/dm-core.h @@ -11,6 +11,7 @@ #include <linux/kthread.h> #include <linux/ktime.h> +#include <linux/genhd.h> #include <linux/blk-mq.h> #include <trace/events/block.h> @@ -25,9 +26,11 @@ struct dm_kobject_holder { }; /* - * DM core internal structure that used directly by dm.c and dm-rq.c - * DM targets must _not_ deference a mapped_device to directly access its members! + * DM core internal structures used directly by dm.c, dm-rq.c and dm-table.c. + * DM targets must _not_ deference a mapped_device or dm_table to directly + * access their members! */ + struct mapped_device { struct mutex suspend_lock; @@ -119,6 +122,55 @@ void disable_discard(struct mapped_device *md); void disable_write_same(struct mapped_device *md); void disable_write_zeroes(struct mapped_device *md); +static inline sector_t dm_get_size(struct mapped_device *md) +{ + return get_capacity(md->disk); +} + +static inline struct dm_stats *dm_get_stats(struct mapped_device *md) +{ + return &md->stats; +} + +#define DM_TABLE_MAX_DEPTH 16 + +struct dm_table { + struct mapped_device *md; + enum dm_queue_mode type; + + /* btree table */ + unsigned int depth; + unsigned int counts[DM_TABLE_MAX_DEPTH]; /* in nodes */ + sector_t *index[DM_TABLE_MAX_DEPTH]; + + unsigned int num_targets; + unsigned int num_allocated; + sector_t *highs; + struct dm_target *targets; + + struct target_type *immutable_target_type; + + bool integrity_supported:1; + bool singleton:1; + unsigned integrity_added:1; + + /* + * Indicates the rw permissions for the new logical + * device. This should be a combination of FMODE_READ + * and FMODE_WRITE. + */ + fmode_t mode; + + /* a list of devices used by this table */ + struct list_head devices; + + /* events get handed up using this callback */ + void (*event_fn)(void *); + void *event_context; + + struct dm_md_mempools *mempools; +}; + static inline struct completion *dm_get_completion_from_kobject(struct kobject *kobj) { return &container_of(kobj, struct dm_kobject_holder, kobj)->completion; diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 6d743ff6a314..729a72ec30cc 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -175,7 +175,7 @@ static void __dm_mq_kick_requeue_list(struct request_queue *q, unsigned long mse void dm_mq_kick_requeue_list(struct mapped_device *md) { - __dm_mq_kick_requeue_list(dm_get_md_queue(md), 0); + __dm_mq_kick_requeue_list(md->queue, 0); } EXPORT_SYMBOL(dm_mq_kick_requeue_list); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 704345e95cc1..3ad22adf322d 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -25,48 +25,10 @@ #define DM_MSG_PREFIX "table" -#define MAX_DEPTH 16 #define NODE_SIZE L1_CACHE_BYTES #define KEYS_PER_NODE (NODE_SIZE / sizeof(sector_t)) #define CHILDREN_PER_NODE (KEYS_PER_NODE + 1) -struct dm_table { - struct mapped_device *md; - enum dm_queue_mode type; - - /* btree table */ - unsigned int depth; - unsigned int counts[MAX_DEPTH]; /* in nodes */ - sector_t *index[MAX_DEPTH]; - - unsigned int num_targets; - unsigned int num_allocated; - sector_t *highs; - struct dm_target *targets; - - struct target_type *immutable_target_type; - - bool integrity_supported:1; - bool singleton:1; - unsigned integrity_added:1; - - /* - * Indicates the rw permissions for the new logical - * device. This should be a combination of FMODE_READ - * and FMODE_WRITE. - */ - fmode_t mode; - - /* a list of devices used by this table */ - struct list_head devices; - - /* events get handed up using this callback */ - void (*event_fn)(void *); - void *event_context; - - struct dm_md_mempools *mempools; -}; - /* * Similar to ceiling(log_size(n)) */ @@ -2085,16 +2047,11 @@ EXPORT_SYMBOL_GPL(dm_table_device_name); void dm_table_run_md_queue_async(struct dm_table *t) { - struct mapped_device *md; - struct request_queue *queue; - if (!dm_table_request_based(t)) return; - md = dm_table_get_md(t); - queue = dm_get_md_queue(md); - if (queue) - blk_mq_run_hw_queues(queue, true); + if (t->md->queue) + blk_mq_run_hw_queues(t->md->queue, true); } EXPORT_SYMBOL(dm_table_run_md_queue_async); diff --git a/drivers/md/dm.c b/drivers/md/dm.c index b5b18bafd865..a1adcf0ab821 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -422,21 +422,6 @@ static void do_deferred_remove(struct work_struct *w) dm_deferred_remove(); } -sector_t dm_get_size(struct mapped_device *md) -{ - return get_capacity(md->disk); -} - -struct request_queue *dm_get_md_queue(struct mapped_device *md) -{ - return md->queue; -} - -struct dm_stats *dm_get_stats(struct mapped_device *md) -{ - return &md->stats; -} - static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) { struct mapped_device *md = bdev->bd_disk->private_data; @@ -1057,7 +1042,7 @@ static sector_t max_io_len(struct dm_target *ti, sector_t sector) * blk_max_size_offset() provides required splitting. * - blk_max_size_offset() also respects q->limits.max_sectors */ - max_len = blk_max_size_offset(dm_table_get_md(ti->table)->queue, + max_len = blk_max_size_offset(ti->table->md->queue, target_offset); if (len > max_len) len = max_len; @@ -2931,19 +2916,19 @@ int dm_test_deferred_remove_flag(struct mapped_device *md) int dm_suspended(struct dm_target *ti) { - return dm_suspended_md(dm_table_get_md(ti->table)); + return dm_suspended_md(ti->table->md); } EXPORT_SYMBOL_GPL(dm_suspended); int dm_post_suspending(struct dm_target *ti) { - return dm_post_suspending_md(dm_table_get_md(ti->table)); + return dm_post_suspending_md(ti->table->md); } EXPORT_SYMBOL_GPL(dm_post_suspending); int dm_noflush_suspending(struct dm_target *ti) { - return __noflush_suspending(dm_table_get_md(ti->table)); + return __noflush_suspending(ti->table->md); } EXPORT_SYMBOL_GPL(dm_noflush_suspending); diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 4f5fe664d05a..fffe1e289c53 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -179,12 +179,9 @@ int dm_open_count(struct mapped_device *md); int dm_lock_for_deletion(struct mapped_device *md, bool mark_deferred, bool only_deferred); int dm_cancel_deferred_remove(struct mapped_device *md); int dm_request_based(struct mapped_device *md); -sector_t dm_get_size(struct mapped_device *md); -struct request_queue *dm_get_md_queue(struct mapped_device *md); int dm_get_table_device(struct mapped_device *md, dev_t dev, fmode_t mode, struct dm_dev **result); void dm_put_table_device(struct mapped_device *md, struct dm_dev *d); -struct dm_stats *dm_get_stats(struct mapped_device *md); int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, unsigned cookie); |