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Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c71
1 files changed, 51 insertions, 20 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 5475081dcbd6..9e7765ea73a9 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/sched/mm.h>
#include <linux/sched/signal.h>
#include <linux/blkpg.h>
#include <linux/bio.h>
@@ -140,6 +141,7 @@ EXPORT_SYMBOL_GPL(dm_bio_get_target_bio_nr);
#define DMF_NOFLUSH_SUSPENDING 5
#define DMF_DEFERRED_REMOVE 6
#define DMF_SUSPENDED_INTERNALLY 7
+#define DMF_POST_SUSPENDING 8
#define DM_NUMA_NODE NUMA_NO_NODE
static int dm_numa_node = DM_NUMA_NODE;
@@ -1438,9 +1440,6 @@ static int __send_empty_flush(struct clone_info *ci)
BUG_ON(bio_has_data(ci->bio));
while ((ti = dm_table_get_target(ci->map, target_nr++)))
__send_duplicate_bios(ci, ti, ti->num_flush_bios, NULL);
-
- bio_disassociate_blkg(ci->bio);
-
return 0;
}
@@ -1628,6 +1627,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
ci.bio = &flush_bio;
ci.sector_count = 0;
error = __send_empty_flush(&ci);
+ bio_uninit(ci.bio);
/* dec_pending submits any data associated with flush */
} else if (bio_op(bio) == REQ_OP_ZONE_RESET) {
ci.bio = bio;
@@ -1702,6 +1702,7 @@ static blk_qc_t __process_bio(struct mapped_device *md, struct dm_table *map,
ci.bio = &flush_bio;
ci.sector_count = 0;
error = __send_empty_flush(&ci);
+ bio_uninit(ci.bio);
/* dec_pending submits any data associated with flush */
} else {
struct dm_target_io *tio;
@@ -1762,8 +1763,9 @@ static blk_qc_t dm_process_bio(struct mapped_device *md,
* won't be imposed.
*/
if (current->bio_list) {
- blk_queue_split(md->queue, &bio);
- if (!is_abnormal_io(bio))
+ if (is_abnormal_io(bio))
+ blk_queue_split(md->queue, &bio);
+ else
dm_queue_split(md, ti, &bio);
}
@@ -1811,7 +1813,8 @@ static int dm_any_congested(void *congested_data, int bdi_bits)
* With request-based DM we only need to check the
* top-level queue for congestion.
*/
- r = md->queue->backing_dev_info->wb.state & bdi_bits;
+ struct backing_dev_info *bdi = md->queue->backing_dev_info;
+ r = bdi->wb.congested->state & bdi_bits;
} else {
map = dm_get_live_table_fast(md);
if (map)
@@ -1877,14 +1880,6 @@ static const struct dax_operations dm_dax_ops;
static void dm_wq_work(struct work_struct *work);
-static void dm_init_normal_md_queue(struct mapped_device *md)
-{
- /*
- * Initialize aspects of queue that aren't relevant for blk-mq
- */
- md->queue->backing_dev_info->congested_fn = dm_any_congested;
-}
-
static void cleanup_mapped_device(struct mapped_device *md)
{
if (md->wq)
@@ -1972,7 +1967,12 @@ static struct mapped_device *alloc_dev(int minor)
if (!md->queue)
goto bad;
md->queue->queuedata = md;
- md->queue->backing_dev_info->congested_data = md;
+ /*
+ * default to bio-based required ->make_request_fn until DM
+ * table is loaded and md->type established. If request-based
+ * table is loaded: blk-mq will override accordingly.
+ */
+ blk_queue_make_request(md->queue, dm_make_request);
md->disk = alloc_disk_node(1, md->numa_node_id);
if (!md->disk)
@@ -2265,6 +2265,12 @@ struct queue_limits *dm_get_queue_limits(struct mapped_device *md)
}
EXPORT_SYMBOL_GPL(dm_get_queue_limits);
+static void dm_init_congested_fn(struct mapped_device *md)
+{
+ md->queue->backing_dev_info->congested_data = md;
+ md->queue->backing_dev_info->congested_fn = dm_any_congested;
+}
+
/*
* Setup the DM device's queue based on md's type
*/
@@ -2281,12 +2287,12 @@ int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t)
DMERR("Cannot initialize queue for request-based dm-mq mapped device");
return r;
}
+ dm_init_congested_fn(md);
break;
case DM_TYPE_BIO_BASED:
case DM_TYPE_DAX_BIO_BASED:
case DM_TYPE_NVME_BIO_BASED:
- dm_init_normal_md_queue(md);
- blk_queue_make_request(md->queue, dm_make_request);
+ dm_init_congested_fn(md);
break;
case DM_TYPE_NONE:
WARN_ON_ONCE(true);
@@ -2385,6 +2391,8 @@ static void __dm_destroy(struct mapped_device *md, bool wait)
map = dm_get_live_table(md, &srcu_idx);
if (!dm_suspended_md(md)) {
dm_table_presuspend_targets(map);
+ set_bit(DMF_SUSPENDED, &md->flags);
+ set_bit(DMF_POST_SUSPENDING, &md->flags);
dm_table_postsuspend_targets(map);
}
/* dm_put_live_table must be before msleep, otherwise deadlock is possible */
@@ -2707,7 +2715,9 @@ retry:
if (r)
goto out_unlock;
+ set_bit(DMF_POST_SUSPENDING, &md->flags);
dm_table_postsuspend_targets(map);
+ clear_bit(DMF_POST_SUSPENDING, &md->flags);
out_unlock:
mutex_unlock(&md->suspend_lock);
@@ -2804,7 +2814,9 @@ static void __dm_internal_suspend(struct mapped_device *md, unsigned suspend_fla
(void) __dm_suspend(md, map, suspend_flags, TASK_UNINTERRUPTIBLE,
DMF_SUSPENDED_INTERNALLY);
+ set_bit(DMF_POST_SUSPENDING, &md->flags);
dm_table_postsuspend_targets(map);
+ clear_bit(DMF_POST_SUSPENDING, &md->flags);
}
static void __dm_internal_resume(struct mapped_device *md)
@@ -2881,17 +2893,25 @@ EXPORT_SYMBOL_GPL(dm_internal_resume_fast);
int dm_kobject_uevent(struct mapped_device *md, enum kobject_action action,
unsigned cookie)
{
+ int r;
+ unsigned noio_flag;
char udev_cookie[DM_COOKIE_LENGTH];
char *envp[] = { udev_cookie, NULL };
+ noio_flag = memalloc_noio_save();
+
if (!cookie)
- return kobject_uevent(&disk_to_dev(md->disk)->kobj, action);
+ r = kobject_uevent(&disk_to_dev(md->disk)->kobj, action);
else {
snprintf(udev_cookie, DM_COOKIE_LENGTH, "%s=%u",
DM_COOKIE_ENV_VAR_NAME, cookie);
- return kobject_uevent_env(&disk_to_dev(md->disk)->kobj,
- action, envp);
+ r = kobject_uevent_env(&disk_to_dev(md->disk)->kobj,
+ action, envp);
}
+
+ memalloc_noio_restore(noio_flag);
+
+ return r;
}
uint32_t dm_next_uevent_seq(struct mapped_device *md)
@@ -2957,6 +2977,11 @@ int dm_suspended_md(struct mapped_device *md)
return test_bit(DMF_SUSPENDED, &md->flags);
}
+static int dm_post_suspending_md(struct mapped_device *md)
+{
+ return test_bit(DMF_POST_SUSPENDING, &md->flags);
+}
+
int dm_suspended_internally_md(struct mapped_device *md)
{
return test_bit(DMF_SUSPENDED_INTERNALLY, &md->flags);
@@ -2973,6 +2998,12 @@ int dm_suspended(struct dm_target *ti)
}
EXPORT_SYMBOL_GPL(dm_suspended);
+int dm_post_suspending(struct dm_target *ti)
+{
+ return dm_post_suspending_md(dm_table_get_md(ti->table));
+}
+EXPORT_SYMBOL_GPL(dm_post_suspending);
+
int dm_noflush_suspending(struct dm_target *ti)
{
return __noflush_suspending(dm_table_get_md(ti->table));
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-26 09:03:38 +0000