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-rw-r--r--include/linux/blkdev.h245
1 files changed, 219 insertions, 26 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c47c358ba052..286b2a264383 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -24,6 +24,7 @@
#include <linux/rcupdate.h>
#include <linux/percpu-refcount.h>
#include <linux/scatterlist.h>
+#include <linux/blkzoned.h>
struct module;
struct scsi_ioctl_command;
@@ -37,6 +38,7 @@ struct bsg_job;
struct blkcg_gq;
struct blk_flush_queue;
struct pr_ops;
+struct rq_wb;
#define BLKDEV_MIN_RQ 4
#define BLKDEV_MAX_RQ 128 /* Default maximum */
@@ -77,6 +79,55 @@ enum rq_cmd_type_bits {
REQ_TYPE_DRV_PRIV, /* driver defined types from here */
};
+/*
+ * request flags */
+typedef __u32 __bitwise req_flags_t;
+
+/* elevator knows about this request */
+#define RQF_SORTED ((__force req_flags_t)(1 << 0))
+/* drive already may have started this one */
+#define RQF_STARTED ((__force req_flags_t)(1 << 1))
+/* uses tagged queueing */
+#define RQF_QUEUED ((__force req_flags_t)(1 << 2))
+/* may not be passed by ioscheduler */
+#define RQF_SOFTBARRIER ((__force req_flags_t)(1 << 3))
+/* request for flush sequence */
+#define RQF_FLUSH_SEQ ((__force req_flags_t)(1 << 4))
+/* merge of different types, fail separately */
+#define RQF_MIXED_MERGE ((__force req_flags_t)(1 << 5))
+/* track inflight for MQ */
+#define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6))
+/* don't call prep for this one */
+#define RQF_DONTPREP ((__force req_flags_t)(1 << 7))
+/* set for "ide_preempt" requests and also for requests for which the SCSI
+ "quiesce" state must be ignored. */
+#define RQF_PREEMPT ((__force req_flags_t)(1 << 8))
+/* contains copies of user pages */
+#define RQF_COPY_USER ((__force req_flags_t)(1 << 9))
+/* vaguely specified driver internal error. Ignored by the block layer */
+#define RQF_FAILED ((__force req_flags_t)(1 << 10))
+/* don't warn about errors */
+#define RQF_QUIET ((__force req_flags_t)(1 << 11))
+/* elevator private data attached */
+#define RQF_ELVPRIV ((__force req_flags_t)(1 << 12))
+/* account I/O stat */
+#define RQF_IO_STAT ((__force req_flags_t)(1 << 13))
+/* request came from our alloc pool */
+#define RQF_ALLOCED ((__force req_flags_t)(1 << 14))
+/* runtime pm request */
+#define RQF_PM ((__force req_flags_t)(1 << 15))
+/* on IO scheduler merge hash */
+#define RQF_HASHED ((__force req_flags_t)(1 << 16))
+/* IO stats tracking on */
+#define RQF_STATS ((__force req_flags_t)(1 << 17))
+/* Look at ->special_vec for the actual data payload instead of the
+ bio chain. */
+#define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18))
+
+/* flags that prevent us from merging requests: */
+#define RQF_NOMERGE_FLAGS \
+ (RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD)
+
#define BLK_MAX_CDB 16
/*
@@ -97,7 +148,8 @@ struct request {
int cpu;
unsigned cmd_type;
- u64 cmd_flags;
+ unsigned int cmd_flags; /* op and common flags */
+ req_flags_t rq_flags;
unsigned long atomic_flags;
/* the following two fields are internal, NEVER access directly */
@@ -126,6 +178,7 @@ struct request {
*/
union {
struct rb_node rb_node; /* sort/lookup */
+ struct bio_vec special_vec;
void *completion_data;
};
@@ -151,6 +204,7 @@ struct request {
struct gendisk *rq_disk;
struct hd_struct *part;
unsigned long start_time;
+ struct blk_issue_stat issue_stat;
#ifdef CONFIG_BLK_CGROUP
struct request_list *rl; /* rl this rq is alloced from */
unsigned long long start_time_ns;
@@ -198,20 +252,6 @@ struct request {
struct request *next_rq;
};
-#define REQ_OP_SHIFT (8 * sizeof(u64) - REQ_OP_BITS)
-#define req_op(req) ((req)->cmd_flags >> REQ_OP_SHIFT)
-
-#define req_set_op(req, op) do { \
- WARN_ON(op >= (1 << REQ_OP_BITS)); \
- (req)->cmd_flags &= ((1ULL << REQ_OP_SHIFT) - 1); \
- (req)->cmd_flags |= ((u64) (op) << REQ_OP_SHIFT); \
-} while (0)
-
-#define req_set_op_attrs(req, op, flags) do { \
- req_set_op(req, op); \
- (req)->cmd_flags |= flags; \
-} while (0)
-
static inline unsigned short req_get_ioprio(struct request *req)
{
return req->ioprio;
@@ -261,6 +301,15 @@ struct blk_queue_tag {
#define BLK_SCSI_MAX_CMDS (256)
#define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
+/*
+ * Zoned block device models (zoned limit).
+ */
+enum blk_zoned_model {
+ BLK_ZONED_NONE, /* Regular block device */
+ BLK_ZONED_HA, /* Host-aware zoned block device */
+ BLK_ZONED_HM, /* Host-managed zoned block device */
+};
+
struct queue_limits {
unsigned long bounce_pfn;
unsigned long seg_boundary_mask;
@@ -278,6 +327,7 @@ struct queue_limits {
unsigned int max_discard_sectors;
unsigned int max_hw_discard_sectors;
unsigned int max_write_same_sectors;
+ unsigned int max_write_zeroes_sectors;
unsigned int discard_granularity;
unsigned int discard_alignment;
@@ -290,8 +340,45 @@ struct queue_limits {
unsigned char cluster;
unsigned char discard_zeroes_data;
unsigned char raid_partial_stripes_expensive;
+ enum blk_zoned_model zoned;
};
+#ifdef CONFIG_BLK_DEV_ZONED
+
+struct blk_zone_report_hdr {
+ unsigned int nr_zones;
+ u8 padding[60];
+};
+
+extern int blkdev_report_zones(struct block_device *bdev,
+ sector_t sector, struct blk_zone *zones,
+ unsigned int *nr_zones, gfp_t gfp_mask);
+extern int blkdev_reset_zones(struct block_device *bdev, sector_t sectors,
+ sector_t nr_sectors, gfp_t gfp_mask);
+
+extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg);
+extern int blkdev_reset_zones_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg);
+
+#else /* CONFIG_BLK_DEV_ZONED */
+
+static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
+ fmode_t mode, unsigned int cmd,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+static inline int blkdev_reset_zones_ioctl(struct block_device *bdev,
+ fmode_t mode, unsigned int cmd,
+ unsigned long arg)
+{
+ return -ENOTTY;
+}
+
+#endif /* CONFIG_BLK_DEV_ZONED */
+
struct request_queue {
/*
* Together with queue_head for cacheline sharing
@@ -302,6 +389,8 @@ struct request_queue {
int nr_rqs[2]; /* # allocated [a]sync rqs */
int nr_rqs_elvpriv; /* # allocated rqs w/ elvpriv */
+ struct rq_wb *rq_wb;
+
/*
* If blkcg is not used, @q->root_rl serves all requests. If blkcg
* is used, root blkg allocates from @q->root_rl and all other
@@ -327,6 +416,8 @@ struct request_queue {
struct blk_mq_ctx __percpu *queue_ctx;
unsigned int nr_queues;
+ unsigned int queue_depth;
+
/* hw dispatch queues */
struct blk_mq_hw_ctx **queue_hw_ctx;
unsigned int nr_hw_queues;
@@ -412,6 +503,9 @@ struct request_queue {
unsigned int nr_sorted;
unsigned int in_flight[2];
+
+ struct blk_rq_stat rq_stats[2];
+
/*
* Number of active block driver functions for which blk_drain_queue()
* must wait. Must be incremented around functions that unlock the
@@ -420,6 +514,7 @@ struct request_queue {
unsigned int request_fn_active;
unsigned int rq_timeout;
+ int poll_nsec;
struct timer_list timeout;
struct work_struct timeout_work;
struct list_head timeout_list;
@@ -505,6 +600,7 @@ struct request_queue {
#define QUEUE_FLAG_FUA 24 /* device supports FUA writes */
#define QUEUE_FLAG_FLUSH_NQ 25 /* flush not queueuable */
#define QUEUE_FLAG_DAX 26 /* device supports DAX */
+#define QUEUE_FLAG_STATS 27 /* track rq completion times */
#define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
(1 << QUEUE_FLAG_STACKABLE) | \
@@ -601,7 +697,7 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q)
REQ_FAILFAST_DRIVER))
#define blk_account_rq(rq) \
- (((rq)->cmd_flags & REQ_STARTED) && \
+ (((rq)->rq_flags & RQF_STARTED) && \
((rq)->cmd_type == REQ_TYPE_FS))
#define blk_rq_cpu_valid(rq) ((rq)->cpu != -1)
@@ -627,17 +723,31 @@ static inline unsigned int blk_queue_cluster(struct request_queue *q)
return q->limits.cluster;
}
-/*
- * We regard a request as sync, if either a read or a sync write
- */
-static inline bool rw_is_sync(int op, unsigned int rw_flags)
+static inline enum blk_zoned_model
+blk_queue_zoned_model(struct request_queue *q)
+{
+ return q->limits.zoned;
+}
+
+static inline bool blk_queue_is_zoned(struct request_queue *q)
+{
+ switch (blk_queue_zoned_model(q)) {
+ case BLK_ZONED_HA:
+ case BLK_ZONED_HM:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline unsigned int blk_queue_zone_size(struct request_queue *q)
{
- return op == REQ_OP_READ || (rw_flags & REQ_SYNC);
+ return blk_queue_is_zoned(q) ? q->limits.chunk_sectors : 0;
}
static inline bool rq_is_sync(struct request *rq)
{
- return rw_is_sync(req_op(rq), rq->cmd_flags);
+ return op_is_sync(rq->cmd_flags);
}
static inline bool blk_rl_full(struct request_list *rl, bool sync)
@@ -669,8 +779,13 @@ static inline bool rq_mergeable(struct request *rq)
if (req_op(rq) == REQ_OP_FLUSH)
return false;
+ if (req_op(rq) == REQ_OP_WRITE_ZEROES)
+ return false;
+
if (rq->cmd_flags & REQ_NOMERGE_FLAGS)
return false;
+ if (rq->rq_flags & RQF_NOMERGE_FLAGS)
+ return false;
return true;
}
@@ -683,6 +798,14 @@ static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b)
return false;
}
+static inline unsigned int blk_queue_depth(struct request_queue *q)
+{
+ if (q->queue_depth)
+ return q->queue_depth;
+
+ return q->nr_requests;
+}
+
/*
* q->prep_rq_fn return values
*/
@@ -790,8 +913,6 @@ extern void __blk_put_request(struct request_queue *, struct request *);
extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
extern void blk_rq_set_block_pc(struct request *);
extern void blk_requeue_request(struct request_queue *, struct request *);
-extern void blk_add_request_payload(struct request *rq, struct page *page,
- int offset, unsigned int len);
extern int blk_lld_busy(struct request_queue *q);
extern int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
struct bio_set *bs, gfp_t gfp_mask,
@@ -824,6 +945,7 @@ extern void __blk_run_queue(struct request_queue *q);
extern void __blk_run_queue_uncond(struct request_queue *q);
extern void blk_run_queue(struct request_queue *);
extern void blk_run_queue_async(struct request_queue *q);
+extern void blk_mq_quiesce_queue(struct request_queue *q);
extern int blk_rq_map_user(struct request_queue *, struct request *,
struct rq_map_data *, void __user *, unsigned long,
gfp_t);
@@ -837,7 +959,7 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *,
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
struct request *, int, rq_end_io_fn *);
-bool blk_poll(struct request_queue *q, blk_qc_t cookie);
+bool blk_mq_poll(struct request_queue *q, blk_qc_t cookie);
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
{
@@ -888,6 +1010,9 @@ static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
if (unlikely(op == REQ_OP_WRITE_SAME))
return q->limits.max_write_same_sectors;
+ if (unlikely(op == REQ_OP_WRITE_ZEROES))
+ return q->limits.max_write_zeroes_sectors;
+
return q->limits.max_sectors;
}
@@ -934,6 +1059,20 @@ static inline unsigned int blk_rq_count_bios(struct request *rq)
}
/*
+ * blk_rq_set_prio - associate a request with prio from ioc
+ * @rq: request of interest
+ * @ioc: target iocontext
+ *
+ * Assocate request prio with ioc prio so request based drivers
+ * can leverage priority information.
+ */
+static inline void blk_rq_set_prio(struct request *rq, struct io_context *ioc)
+{
+ if (ioc)
+ rq->ioprio = ioc->ioprio;
+}
+
+/*
* Request issue related functions.
*/
extern struct request *blk_peek_request(struct request_queue *q);
@@ -991,6 +1130,8 @@ extern void blk_queue_max_discard_sectors(struct request_queue *q,
unsigned int max_discard_sectors);
extern void blk_queue_max_write_same_sectors(struct request_queue *q,
unsigned int max_write_same_sectors);
+extern void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
+ unsigned int max_write_same_sectors);
extern void blk_queue_logical_block_size(struct request_queue *, unsigned short);
extern void blk_queue_physical_block_size(struct request_queue *, unsigned int);
extern void blk_queue_alignment_offset(struct request_queue *q,
@@ -999,6 +1140,7 @@ 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);
extern void blk_queue_io_opt(struct request_queue *q, unsigned int opt);
+extern void blk_set_queue_depth(struct request_queue *q, unsigned int depth);
extern void blk_set_default_limits(struct queue_limits *lim);
extern void blk_set_stacking_limits(struct queue_limits *lim);
extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
@@ -1027,6 +1169,13 @@ extern void blk_queue_flush_queueable(struct request_queue *q, bool queueable);
extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
+static inline unsigned short blk_rq_nr_phys_segments(struct request *rq)
+{
+ if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
+ return 1;
+ return rq->nr_phys_segments;
+}
+
extern int blk_rq_map_sg(struct request_queue *, struct request *, struct scatterlist *);
extern void blk_dump_rq_flags(struct request *, char *);
extern long nr_blockdev_pages(void);
@@ -1057,7 +1206,7 @@ static inline int blk_pre_runtime_suspend(struct request_queue *q)
static inline void blk_post_runtime_suspend(struct request_queue *q, int err) {}
static inline void blk_pre_runtime_resume(struct request_queue *q) {}
static inline void blk_post_runtime_resume(struct request_queue *q, int err) {}
-extern inline void blk_set_runtime_active(struct request_queue *q) {}
+static inline void blk_set_runtime_active(struct request_queue *q) {}
#endif
/*
@@ -1078,6 +1227,7 @@ struct blk_plug {
struct list_head cb_list; /* md requires an unplug callback */
};
#define BLK_MAX_REQUEST_COUNT 16
+#define BLK_PLUG_FLUSH_SIZE (128 * 1024)
struct blk_plug_cb;
typedef void (*blk_plug_cb_fn)(struct blk_plug_cb *, bool);
@@ -1151,6 +1301,9 @@ extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
struct bio **biop);
extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, struct page *page);
+extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
+ sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,
+ bool discard);
extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
sector_t nr_sects, gfp_t gfp_mask, bool discard);
static inline int sb_issue_discard(struct super_block *sb, sector_t block,
@@ -1354,6 +1507,46 @@ static inline unsigned int bdev_write_same(struct block_device *bdev)
return 0;
}
+static inline unsigned int bdev_write_zeroes_sectors(struct block_device *bdev)
+{
+ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q)
+ return q->limits.max_write_zeroes_sectors;
+
+ return 0;
+}
+
+static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev)
+{
+ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q)
+ return blk_queue_zoned_model(q);
+
+ return BLK_ZONED_NONE;
+}
+
+static inline bool bdev_is_zoned(struct block_device *bdev)
+{
+ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q)
+ return blk_queue_is_zoned(q);
+
+ return false;
+}
+
+static inline unsigned int bdev_zone_size(struct block_device *bdev)
+{
+ struct request_queue *q = bdev_get_queue(bdev);
+
+ if (q)
+ return blk_queue_zone_size(q);
+
+ return 0;
+}
+
static inline int queue_dma_alignment(struct request_queue *q)
{
return q ? q->dma_alignment : 511;
generated by cgit (git 2.34.1) at 2024-07-04 05:19:13 +0000