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-rw-r--r--include/linux/blkdev.h91
1 files changed, 58 insertions, 33 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bb5636cc17b9..639cae2c158b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -8,6 +8,7 @@
#include <linux/genhd.h>
#include <linux/list.h>
#include <linux/llist.h>
+#include <linux/minmax.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include <linux/pagemap.h>
@@ -24,6 +25,7 @@
#include <linux/percpu-refcount.h>
#include <linux/scatterlist.h>
#include <linux/blkzoned.h>
+#include <linux/pm.h>
struct module;
struct scsi_ioctl_command;
@@ -352,6 +354,8 @@ struct queue_limits {
typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx,
void *data);
+void blk_queue_set_zoned(struct gendisk *disk, enum blk_zoned_model model);
+
#ifdef CONFIG_BLK_DEV_ZONED
#define BLK_ALL_ZONES ((unsigned int)-1)
@@ -396,6 +400,8 @@ struct request_queue {
struct request *last_merge;
struct elevator_queue *elevator;
+ struct percpu_ref q_usage_counter;
+
struct blk_queue_stats *stats;
struct rq_qos *rq_qos;
@@ -458,7 +464,7 @@ struct request_queue {
#ifdef CONFIG_PM
struct device *dev;
- int rpm_status;
+ enum rpm_status rpm_status;
unsigned int nr_pending;
#endif
@@ -484,6 +490,8 @@ struct request_queue {
struct timer_list timeout;
struct work_struct timeout_work;
+ atomic_t nr_active_requests_shared_sbitmap;
+
struct list_head icq_list;
#ifdef CONFIG_BLK_CGROUP
DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS);
@@ -566,7 +574,6 @@ struct request_queue {
* percpu_ref_kill() and percpu_ref_reinit().
*/
struct mutex mq_freeze_lock;
- struct percpu_ref q_usage_counter;
struct blk_mq_tag_set *tag_set;
struct list_head tag_set_list;
@@ -603,6 +610,7 @@ struct request_queue {
#define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
#define QUEUE_FLAG_DEAD 13 /* queue tear-down finished */
#define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
+#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
#define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
#define QUEUE_FLAG_WC 17 /* Write back caching */
#define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
@@ -615,9 +623,12 @@ struct request_queue {
#define QUEUE_FLAG_PCI_P2PDMA 25 /* device supports PCI p2p requests */
#define QUEUE_FLAG_ZONE_RESETALL 26 /* supports Zone Reset All */
#define QUEUE_FLAG_RQ_ALLOC_TIME 27 /* record rq->alloc_time_ns */
+#define QUEUE_FLAG_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
+#define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
#define QUEUE_FLAG_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
- (1 << QUEUE_FLAG_SAME_COMP))
+ (1 << QUEUE_FLAG_SAME_COMP) | \
+ (1 << QUEUE_FLAG_NOWAIT))
void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
@@ -631,6 +642,8 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
#define blk_queue_noxmerges(q) \
test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags)
#define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags)
+#define blk_queue_stable_writes(q) \
+ test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags)
#define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
#define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
#define blk_queue_discard(q) test_bit(QUEUE_FLAG_DISCARD, &(q)->queue_flags)
@@ -657,6 +670,7 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
#define blk_queue_pm_only(q) atomic_read(&(q)->pm_only)
#define blk_queue_fua(q) test_bit(QUEUE_FLAG_FUA, &(q)->queue_flags)
#define blk_queue_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags)
+#define blk_queue_nowait(q) test_bit(QUEUE_FLAG_NOWAIT, &(q)->queue_flags)
extern void blk_set_pm_only(struct request_queue *q);
extern void blk_clear_pm_only(struct request_queue *q);
@@ -685,7 +699,9 @@ static inline bool queue_is_mq(struct request_queue *q)
static inline enum blk_zoned_model
blk_queue_zoned_model(struct request_queue *q)
{
- return q->limits.zoned;
+ if (IS_ENABLED(CONFIG_BLK_DEV_ZONED))
+ return q->limits.zoned;
+ return BLK_ZONED_NONE;
}
static inline bool blk_queue_is_zoned(struct request_queue *q)
@@ -1059,11 +1075,17 @@ static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
static inline unsigned int blk_max_size_offset(struct request_queue *q,
sector_t offset)
{
- if (!q->limits.chunk_sectors)
+ unsigned int chunk_sectors = q->limits.chunk_sectors;
+
+ if (!chunk_sectors)
return q->limits.max_sectors;
- return min(q->limits.max_sectors, (unsigned int)(q->limits.chunk_sectors -
- (offset & (q->limits.chunk_sectors - 1))));
+ if (likely(is_power_of_2(chunk_sectors)))
+ chunk_sectors -= offset & (chunk_sectors - 1);
+ else
+ chunk_sectors -= sector_div(offset, chunk_sectors);
+
+ return min(q->limits.max_sectors, chunk_sectors);
}
static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
@@ -1130,6 +1152,7 @@ extern void blk_queue_max_zone_append_sectors(struct request_queue *q,
extern void blk_queue_physical_block_size(struct request_queue *, unsigned int);
extern void blk_queue_alignment_offset(struct request_queue *q,
unsigned int alignment);
+void blk_queue_update_readahead(struct request_queue *q);
extern void blk_limits_io_min(struct queue_limits *limits, unsigned int min);
extern void blk_queue_io_min(struct request_queue *q, unsigned int min);
extern void blk_limits_io_opt(struct queue_limits *limits, unsigned int opt);
@@ -1339,6 +1362,11 @@ static inline int sb_issue_zeroout(struct super_block *sb, sector_t block,
extern int blk_verify_command(unsigned char *cmd, fmode_t mode);
+static inline bool bdev_is_partition(struct block_device *bdev)
+{
+ return bdev->bd_partno;
+}
+
enum blk_default_limits {
BLK_MAX_SEGMENTS = 128,
BLK_SAFE_MAX_SECTORS = 255,
@@ -1384,7 +1412,10 @@ static inline unsigned int queue_max_segment_size(const struct request_queue *q)
static inline unsigned int queue_max_zone_append_sectors(const struct request_queue *q)
{
- return q->limits.max_zone_append_sectors;
+
+ const struct queue_limits *l = &q->limits;
+
+ return min(l->max_zone_append_sectors, l->max_sectors);
}
static inline unsigned queue_logical_block_size(const struct request_queue *q)
@@ -1455,10 +1486,9 @@ static inline int bdev_alignment_offset(struct block_device *bdev)
if (q->limits.misaligned)
return -1;
-
- if (bdev != bdev->bd_contains)
- return bdev->bd_part->alignment_offset;
-
+ if (bdev_is_partition(bdev))
+ return queue_limit_alignment_offset(&q->limits,
+ bdev->bd_part->start_sect);
return q->limits.alignment_offset;
}
@@ -1497,9 +1527,9 @@ static inline int bdev_discard_alignment(struct block_device *bdev)
{
struct request_queue *q = bdev_get_queue(bdev);
- if (bdev != bdev->bd_contains)
- return bdev->bd_part->discard_alignment;
-
+ if (bdev_is_partition(bdev))
+ return queue_limit_discard_alignment(&q->limits,
+ bdev->bd_part->start_sect);
return q->limits.discard_alignment;
}
@@ -1642,10 +1672,6 @@ extern int blk_integrity_compare(struct gendisk *, struct gendisk *);
extern int blk_rq_map_integrity_sg(struct request_queue *, struct bio *,
struct scatterlist *);
extern int blk_rq_count_integrity_sg(struct request_queue *, struct bio *);
-extern bool blk_integrity_merge_rq(struct request_queue *, struct request *,
- struct request *);
-extern bool blk_integrity_merge_bio(struct request_queue *, struct request *,
- struct bio *);
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
{
@@ -1773,18 +1799,6 @@ static inline unsigned short queue_max_integrity_segments(const struct request_q
{
return 0;
}
-static inline bool blk_integrity_merge_rq(struct request_queue *rq,
- struct request *r1,
- struct request *r2)
-{
- return true;
-}
-static inline bool blk_integrity_merge_bio(struct request_queue *rq,
- struct request *r,
- struct bio *b)
-{
- return true;
-}
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
unsigned int sectors)
@@ -1930,6 +1944,11 @@ unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
void disk_end_io_acct(struct gendisk *disk, unsigned int op,
unsigned long start_time);
+unsigned long part_start_io_acct(struct gendisk *disk, struct hd_struct **part,
+ struct bio *bio);
+void part_end_io_acct(struct hd_struct *part, struct bio *bio,
+ unsigned long start_time);
+
/**
* bio_start_io_acct - start I/O accounting for bio based drivers
* @bio: bio to start account for
@@ -1967,7 +1986,6 @@ void blkdev_show(struct seq_file *seqf, off_t offset);
#define BLKDEV_MAJOR_MAX 0
#endif
-int blkdev_get(struct block_device *bdev, fmode_t mode, void *holder);
struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
void *holder);
struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder);
@@ -1978,17 +1996,24 @@ void bd_abort_claiming(struct block_device *bdev, struct block_device *whole,
void blkdev_put(struct block_device *bdev, fmode_t mode);
struct block_device *I_BDEV(struct inode *inode);
-struct block_device *bdget(dev_t);
+struct block_device *bdget_part(struct hd_struct *part);
struct block_device *bdgrab(struct block_device *bdev);
void bdput(struct block_device *);
#ifdef CONFIG_BLOCK
void invalidate_bdev(struct block_device *bdev);
+int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
+ loff_t lend);
int sync_blockdev(struct block_device *bdev);
#else
static inline void invalidate_bdev(struct block_device *bdev)
{
}
+static inline int truncate_bdev_range(struct block_device *bdev, fmode_t mode,
+ loff_t lstart, loff_t lend)
+{
+ return 0;
+}
static inline int sync_blockdev(struct block_device *bdev)
{
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.