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-rw-r--r--drivers/md/dm.c46
1 files changed, 27 insertions, 19 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 52b39f335bb3..4720f68f817e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -25,6 +25,16 @@
#define DM_MSG_PREFIX "core"
+#ifdef CONFIG_PRINTK
+/*
+ * ratelimit state to be used in DMXXX_LIMIT().
+ */
+DEFINE_RATELIMIT_STATE(dm_ratelimit_state,
+ DEFAULT_RATELIMIT_INTERVAL,
+ DEFAULT_RATELIMIT_BURST);
+EXPORT_SYMBOL(dm_ratelimit_state);
+#endif
+
/*
* Cookies are numeric values sent with CHANGE and REMOVE
* uevents while resuming, removing or renaming the device.
@@ -130,6 +140,8 @@ struct mapped_device {
/* Protect queue and type against concurrent access. */
struct mutex type_lock;
+ struct target_type *immutable_target_type;
+
struct gendisk *disk;
char name[16];
@@ -180,9 +192,6 @@ struct mapped_device {
/* forced geometry settings */
struct hd_geometry geometry;
- /* For saving the address of __make_request for request based dm */
- make_request_fn *saved_make_request_fn;
-
/* sysfs handle */
struct kobject kobj;
@@ -1391,7 +1400,7 @@ out:
* The request function that just remaps the bio built up by
* dm_merge_bvec.
*/
-static int _dm_request(struct request_queue *q, struct bio *bio)
+static void _dm_request(struct request_queue *q, struct bio *bio)
{
int rw = bio_data_dir(bio);
struct mapped_device *md = q->queuedata;
@@ -1412,19 +1421,12 @@ static int _dm_request(struct request_queue *q, struct bio *bio)
queue_io(md, bio);
else
bio_io_error(bio);
- return 0;
+ return;
}
__split_and_process_bio(md, bio);
up_read(&md->io_lock);
- return 0;
-}
-
-static int dm_make_request(struct request_queue *q, struct bio *bio)
-{
- struct mapped_device *md = q->queuedata;
-
- return md->saved_make_request_fn(q, bio); /* call __make_request() */
+ return;
}
static int dm_request_based(struct mapped_device *md)
@@ -1432,14 +1434,14 @@ static int dm_request_based(struct mapped_device *md)
return blk_queue_stackable(md->queue);
}
-static int dm_request(struct request_queue *q, struct bio *bio)
+static void dm_request(struct request_queue *q, struct bio *bio)
{
struct mapped_device *md = q->queuedata;
if (dm_request_based(md))
- return dm_make_request(q, bio);
-
- return _dm_request(q, bio);
+ blk_queue_bio(q, bio);
+ else
+ _dm_request(q, bio);
}
void dm_dispatch_request(struct request *rq)
@@ -2086,6 +2088,8 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t,
write_lock_irqsave(&md->map_lock, flags);
old_map = md->map;
md->map = t;
+ md->immutable_target_type = dm_table_get_immutable_target_type(t);
+
dm_table_set_restrictions(t, q, limits);
if (merge_is_optional)
set_bit(DMF_MERGE_IS_OPTIONAL, &md->flags);
@@ -2156,6 +2160,11 @@ unsigned dm_get_md_type(struct mapped_device *md)
return md->type;
}
+struct target_type *dm_get_immutable_target_type(struct mapped_device *md)
+{
+ return md->immutable_target_type;
+}
+
/*
* Fully initialize a request-based queue (->elevator, ->request_fn, etc).
*/
@@ -2172,7 +2181,6 @@ static int dm_init_request_based_queue(struct mapped_device *md)
return 0;
md->queue = q;
- md->saved_make_request_fn = md->queue->make_request_fn;
dm_init_md_queue(md);
blk_queue_softirq_done(md->queue, dm_softirq_done);
blk_queue_prep_rq(md->queue, dm_prep_fn);
@@ -2231,6 +2239,7 @@ struct mapped_device *dm_get_md(dev_t dev)
return md;
}
+EXPORT_SYMBOL_GPL(dm_get_md);
void *dm_get_mdptr(struct mapped_device *md)
{
@@ -2316,7 +2325,6 @@ static int dm_wait_for_completion(struct mapped_device *md, int interruptible)
while (1) {
set_current_state(interruptible);
- smp_mb();
if (!md_in_flight(md))
break;
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