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-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmRCvcIQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpk+JEACj01t7Xen2+Razagu3aTx9tmRGFnTNR3MY raFG6B1TADk1TgCWWa2C4Dj67SOispPLm8hbIcOxqB1UscDWCCwjmnr/debADFzW Ap6shv/IRwVGmDp+F7ocYas0ynwooOJg4WJTwkSKz2o4m4p3vzlwAKi4fLiSjbXp gJTrA7WEvDOVjzajlTFUtjr8rc6PdunbGm25cPIufAxUEhvttYex2VbVqjDmfNsE 8tyyk9RWbe4AY/ZYaGXVn4yQ/CgL/sXFkVc5noRXNfAQ/K3CVLQrFLJ3JlwUHpiA xXBor21TUWCZEo33Y2G5NConAYqE7etoPTkaTDO3/aZ+dAMFyhC/WAYLz1KZGMh1 +g1fDX1QKEd40H2lfDXvqF1ob7Ut8EzUx+gvBXcc3/AiRpJ5rjfOcj6LPUMUqQJk nucLLFTiMKecnDMBERbvixqbaTyrjvkFEj2wYJvgj1LKXAd+x/bj8SGajs9r88Nb 9YT9ai/+Yl7Ppfb67rCgXJU7oNZQSAQ2H+X/l2jbiqImOgq1u/45AmINnbanS7HH Y1I8pbH45AcnCgkJRoQwrNX3BnTOTBJ+D/4Fl4b8jsihq0D3UtwCwPCObHP4LW9S MUNPhP3tUuYsAgXqX80+Sao6SYvXDwnbWOM+LOaaZXgjb1ndwDUZXpto8Ra8WB1u 8kM6s6ZR7g== =W1Zb -----END PGP SIGNATURE----- Merge tag 'for-6.4/block-2023-04-21' of git://git.kernel.dk/linux Pull block updates from Jens Axboe: - drbd patches, bringing us closer to unifying the out-of-tree version and the in tree one (Andreas, Christoph) - support for auto-quiesce for the s390 dasd driver (Stefan) - MD pull request via Song: - md/bitmap: Optimal last page size (Jon Derrick) - Various raid10 fixes (Yu Kuai, Li Nan) - md: add error_handlers for raid0 and linear (Mariusz Tkaczyk) - NVMe pull request via Christoph: - Drop redundant pci_enable_pcie_error_reporting (Bjorn Helgaas) - Validate nvmet module parameters (Chaitanya Kulkarni) - Fence TCP socket on receive error (Chris Leech) - Fix async event trace event (Keith Busch) - Minor cleanups (Chaitanya Kulkarni, zhenwei pi) - Fix and cleanup nvmet Identify handling (Damien Le Moal, Christoph Hellwig) - Fix double blk_mq_complete_request race in the timeout handler (Lei Yin) - Fix irq locking in nvme-fcloop (Ming Lei) - Remove queue mapping helper for rdma devices (Sagi Grimberg) - use structured request attribute checks for nbd (Jakub) - fix blk-crypto race conditions between keyslot management (Eric) - add sed-opal support for reading read locking range attributes (Ondrej) - make fault injection configurable for null_blk (Akinobu) - clean up the request insertion API (Christoph) - clean up the queue running API (Christoph) - blkg config helper cleanups (Tejun) - lazy init support for blk-iolatency (Tejun) - various fixes and tweaks to ublk (Ming) - remove hybrid polling. It hasn't really been useful since we got async polled IO support, and these days we don't support sync polled IO at all (Keith) - misc fixes, cleanups, improvements (Zhong, Ondrej, Colin, Chengming, Chaitanya, me) * tag 'for-6.4/block-2023-04-21' of git://git.kernel.dk/linux: (118 commits) nbd: fix incomplete validation of ioctl arg ublk: don't return 0 in case of any failure sed-opal: geometry feature reporting command null_blk: Always check queue mode setting from configfs block: ublk: switch to ioctl command encoding blk-mq: fix the blk_mq_add_to_requeue_list call in blk_kick_flush block, bfq: Fix division by zero error on zero wsum fault-inject: fix build error when FAULT_INJECTION_CONFIGFS=y and CONFIGFS_FS=m block: store bdev->bd_disk->fops->submit_bio state in bdev block: re-arrange the struct block_device fields for better layout md/raid5: remove unused working_disks variable md/raid10: don't call bio_start_io_acct twice for bio which experienced read error md/raid10: fix memleak of md thread md/raid10: fix memleak for 'conf->bio_split' md/raid10: fix leak of 'r10bio->remaining' for recovery md/raid10: don't BUG_ON() in raise_barrier() md: fix soft lockup in status_resync md: add error_handlers for raid0 and linear md: Use optimal I/O size for last bitmap page md: Fix types in sb writer ...
454 lines
13 KiB
C
454 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef INT_BLK_MQ_H
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#define INT_BLK_MQ_H
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#include <linux/blk-mq.h>
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#include "blk-stat.h"
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struct blk_mq_tag_set;
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struct blk_mq_ctxs {
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struct kobject kobj;
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struct blk_mq_ctx __percpu *queue_ctx;
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};
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/**
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* struct blk_mq_ctx - State for a software queue facing the submitting CPUs
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*/
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struct blk_mq_ctx {
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struct {
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spinlock_t lock;
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struct list_head rq_lists[HCTX_MAX_TYPES];
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} ____cacheline_aligned_in_smp;
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unsigned int cpu;
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unsigned short index_hw[HCTX_MAX_TYPES];
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struct blk_mq_hw_ctx *hctxs[HCTX_MAX_TYPES];
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struct request_queue *queue;
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struct blk_mq_ctxs *ctxs;
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struct kobject kobj;
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} ____cacheline_aligned_in_smp;
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enum {
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BLK_MQ_NO_TAG = -1U,
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BLK_MQ_TAG_MIN = 1,
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BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
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};
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typedef unsigned int __bitwise blk_insert_t;
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#define BLK_MQ_INSERT_AT_HEAD ((__force blk_insert_t)0x01)
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void blk_mq_submit_bio(struct bio *bio);
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int blk_mq_poll(struct request_queue *q, blk_qc_t cookie, struct io_comp_batch *iob,
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unsigned int flags);
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void blk_mq_exit_queue(struct request_queue *q);
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int blk_mq_update_nr_requests(struct request_queue *q, unsigned int nr);
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void blk_mq_wake_waiters(struct request_queue *q);
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bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *,
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unsigned int);
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void blk_mq_add_to_requeue_list(struct request *rq, blk_insert_t insert_flags);
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void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list);
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struct request *blk_mq_dequeue_from_ctx(struct blk_mq_hw_ctx *hctx,
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struct blk_mq_ctx *start);
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void blk_mq_put_rq_ref(struct request *rq);
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/*
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* Internal helpers for allocating/freeing the request map
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*/
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void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
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unsigned int hctx_idx);
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void blk_mq_free_rq_map(struct blk_mq_tags *tags);
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struct blk_mq_tags *blk_mq_alloc_map_and_rqs(struct blk_mq_tag_set *set,
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unsigned int hctx_idx, unsigned int depth);
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void blk_mq_free_map_and_rqs(struct blk_mq_tag_set *set,
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struct blk_mq_tags *tags,
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unsigned int hctx_idx);
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/*
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* Internal helpers for request insertion into sw queues
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*/
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void blk_mq_request_bypass_insert(struct request *rq, blk_insert_t flags);
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/*
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* CPU -> queue mappings
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*/
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extern int blk_mq_hw_queue_to_node(struct blk_mq_queue_map *qmap, unsigned int);
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/*
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* blk_mq_map_queue_type() - map (hctx_type,cpu) to hardware queue
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* @q: request queue
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* @type: the hctx type index
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* @cpu: CPU
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*/
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static inline struct blk_mq_hw_ctx *blk_mq_map_queue_type(struct request_queue *q,
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enum hctx_type type,
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unsigned int cpu)
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{
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return xa_load(&q->hctx_table, q->tag_set->map[type].mq_map[cpu]);
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}
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static inline enum hctx_type blk_mq_get_hctx_type(blk_opf_t opf)
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{
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enum hctx_type type = HCTX_TYPE_DEFAULT;
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/*
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* The caller ensure that if REQ_POLLED, poll must be enabled.
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*/
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if (opf & REQ_POLLED)
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type = HCTX_TYPE_POLL;
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else if ((opf & REQ_OP_MASK) == REQ_OP_READ)
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type = HCTX_TYPE_READ;
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return type;
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}
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/*
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* blk_mq_map_queue() - map (cmd_flags,type) to hardware queue
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* @q: request queue
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* @opf: operation type (REQ_OP_*) and flags (e.g. REQ_POLLED).
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* @ctx: software queue cpu ctx
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*/
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static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
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blk_opf_t opf,
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struct blk_mq_ctx *ctx)
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{
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return ctx->hctxs[blk_mq_get_hctx_type(opf)];
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}
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/*
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* sysfs helpers
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*/
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extern void blk_mq_sysfs_init(struct request_queue *q);
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extern void blk_mq_sysfs_deinit(struct request_queue *q);
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int blk_mq_sysfs_register(struct gendisk *disk);
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void blk_mq_sysfs_unregister(struct gendisk *disk);
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int blk_mq_sysfs_register_hctxs(struct request_queue *q);
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void blk_mq_sysfs_unregister_hctxs(struct request_queue *q);
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extern void blk_mq_hctx_kobj_init(struct blk_mq_hw_ctx *hctx);
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void blk_mq_free_plug_rqs(struct blk_plug *plug);
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void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
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void blk_mq_cancel_work_sync(struct request_queue *q);
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void blk_mq_release(struct request_queue *q);
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static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,
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unsigned int cpu)
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{
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return per_cpu_ptr(q->queue_ctx, cpu);
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}
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/*
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* This assumes per-cpu software queueing queues. They could be per-node
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* as well, for instance. For now this is hardcoded as-is. Note that we don't
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* care about preemption, since we know the ctx's are persistent. This does
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* mean that we can't rely on ctx always matching the currently running CPU.
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*/
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static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)
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{
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return __blk_mq_get_ctx(q, raw_smp_processor_id());
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}
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struct blk_mq_alloc_data {
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/* input parameter */
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struct request_queue *q;
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blk_mq_req_flags_t flags;
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unsigned int shallow_depth;
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blk_opf_t cmd_flags;
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req_flags_t rq_flags;
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/* allocate multiple requests/tags in one go */
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unsigned int nr_tags;
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struct request **cached_rq;
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/* input & output parameter */
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struct blk_mq_ctx *ctx;
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struct blk_mq_hw_ctx *hctx;
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};
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struct blk_mq_tags *blk_mq_init_tags(unsigned int nr_tags,
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unsigned int reserved_tags, int node, int alloc_policy);
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void blk_mq_free_tags(struct blk_mq_tags *tags);
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int blk_mq_init_bitmaps(struct sbitmap_queue *bitmap_tags,
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struct sbitmap_queue *breserved_tags, unsigned int queue_depth,
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unsigned int reserved, int node, int alloc_policy);
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unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
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unsigned long blk_mq_get_tags(struct blk_mq_alloc_data *data, int nr_tags,
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unsigned int *offset);
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void blk_mq_put_tag(struct blk_mq_tags *tags, struct blk_mq_ctx *ctx,
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unsigned int tag);
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void blk_mq_put_tags(struct blk_mq_tags *tags, int *tag_array, int nr_tags);
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int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
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struct blk_mq_tags **tags, unsigned int depth, bool can_grow);
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void blk_mq_tag_resize_shared_tags(struct blk_mq_tag_set *set,
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unsigned int size);
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void blk_mq_tag_update_sched_shared_tags(struct request_queue *q);
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void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
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void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_tag_iter_fn *fn,
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void *priv);
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void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
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void *priv);
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static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
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struct blk_mq_hw_ctx *hctx)
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{
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if (!hctx)
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return &bt->ws[0];
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return sbq_wait_ptr(bt, &hctx->wait_index);
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}
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void __blk_mq_tag_busy(struct blk_mq_hw_ctx *);
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void __blk_mq_tag_idle(struct blk_mq_hw_ctx *);
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static inline void blk_mq_tag_busy(struct blk_mq_hw_ctx *hctx)
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{
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if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
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__blk_mq_tag_busy(hctx);
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}
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static inline void blk_mq_tag_idle(struct blk_mq_hw_ctx *hctx)
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{
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if (hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)
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__blk_mq_tag_idle(hctx);
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}
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static inline bool blk_mq_tag_is_reserved(struct blk_mq_tags *tags,
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unsigned int tag)
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{
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return tag < tags->nr_reserved_tags;
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}
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static inline bool blk_mq_is_shared_tags(unsigned int flags)
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{
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return flags & BLK_MQ_F_TAG_HCTX_SHARED;
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}
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static inline struct blk_mq_tags *blk_mq_tags_from_data(struct blk_mq_alloc_data *data)
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{
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if (!(data->rq_flags & RQF_ELV))
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return data->hctx->tags;
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return data->hctx->sched_tags;
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}
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static inline bool blk_mq_hctx_stopped(struct blk_mq_hw_ctx *hctx)
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{
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return test_bit(BLK_MQ_S_STOPPED, &hctx->state);
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}
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static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx)
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{
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return hctx->nr_ctx && hctx->tags;
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}
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unsigned int blk_mq_in_flight(struct request_queue *q,
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struct block_device *part);
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void blk_mq_in_flight_rw(struct request_queue *q, struct block_device *part,
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unsigned int inflight[2]);
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static inline void blk_mq_put_dispatch_budget(struct request_queue *q,
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int budget_token)
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{
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if (q->mq_ops->put_budget)
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q->mq_ops->put_budget(q, budget_token);
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}
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static inline int blk_mq_get_dispatch_budget(struct request_queue *q)
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{
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if (q->mq_ops->get_budget)
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return q->mq_ops->get_budget(q);
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return 0;
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}
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static inline void blk_mq_set_rq_budget_token(struct request *rq, int token)
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{
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if (token < 0)
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return;
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if (rq->q->mq_ops->set_rq_budget_token)
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rq->q->mq_ops->set_rq_budget_token(rq, token);
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}
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static inline int blk_mq_get_rq_budget_token(struct request *rq)
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{
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if (rq->q->mq_ops->get_rq_budget_token)
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return rq->q->mq_ops->get_rq_budget_token(rq);
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return -1;
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}
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static inline void __blk_mq_inc_active_requests(struct blk_mq_hw_ctx *hctx)
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{
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if (blk_mq_is_shared_tags(hctx->flags))
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atomic_inc(&hctx->queue->nr_active_requests_shared_tags);
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else
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atomic_inc(&hctx->nr_active);
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}
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static inline void __blk_mq_sub_active_requests(struct blk_mq_hw_ctx *hctx,
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int val)
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{
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if (blk_mq_is_shared_tags(hctx->flags))
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atomic_sub(val, &hctx->queue->nr_active_requests_shared_tags);
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else
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atomic_sub(val, &hctx->nr_active);
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}
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static inline void __blk_mq_dec_active_requests(struct blk_mq_hw_ctx *hctx)
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{
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__blk_mq_sub_active_requests(hctx, 1);
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}
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static inline int __blk_mq_active_requests(struct blk_mq_hw_ctx *hctx)
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{
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if (blk_mq_is_shared_tags(hctx->flags))
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return atomic_read(&hctx->queue->nr_active_requests_shared_tags);
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return atomic_read(&hctx->nr_active);
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}
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static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
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struct request *rq)
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{
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blk_mq_put_tag(hctx->tags, rq->mq_ctx, rq->tag);
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rq->tag = BLK_MQ_NO_TAG;
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if (rq->rq_flags & RQF_MQ_INFLIGHT) {
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rq->rq_flags &= ~RQF_MQ_INFLIGHT;
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__blk_mq_dec_active_requests(hctx);
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}
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}
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static inline void blk_mq_put_driver_tag(struct request *rq)
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{
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if (rq->tag == BLK_MQ_NO_TAG || rq->internal_tag == BLK_MQ_NO_TAG)
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return;
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__blk_mq_put_driver_tag(rq->mq_hctx, rq);
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}
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bool __blk_mq_get_driver_tag(struct blk_mq_hw_ctx *hctx, struct request *rq);
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static inline bool blk_mq_get_driver_tag(struct request *rq)
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{
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struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
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if (rq->tag != BLK_MQ_NO_TAG &&
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!(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED)) {
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hctx->tags->rqs[rq->tag] = rq;
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return true;
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}
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return __blk_mq_get_driver_tag(hctx, rq);
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}
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static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap)
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{
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int cpu;
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for_each_possible_cpu(cpu)
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qmap->mq_map[cpu] = 0;
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}
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/*
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* blk_mq_plug() - Get caller context plug
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* @bio : the bio being submitted by the caller context
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*
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* Plugging, by design, may delay the insertion of BIOs into the elevator in
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* order to increase BIO merging opportunities. This however can cause BIO
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* insertion order to change from the order in which submit_bio() is being
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* executed in the case of multiple contexts concurrently issuing BIOs to a
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* device, even if these context are synchronized to tightly control BIO issuing
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* order. While this is not a problem with regular block devices, this ordering
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* change can cause write BIO failures with zoned block devices as these
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* require sequential write patterns to zones. Prevent this from happening by
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* ignoring the plug state of a BIO issuing context if it is for a zoned block
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* device and the BIO to plug is a write operation.
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*
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* Return current->plug if the bio can be plugged and NULL otherwise
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*/
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static inline struct blk_plug *blk_mq_plug( struct bio *bio)
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{
|
|
/* Zoned block device write operation case: do not plug the BIO */
|
|
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
|
|
bdev_op_is_zoned_write(bio->bi_bdev, bio_op(bio)))
|
|
return NULL;
|
|
|
|
/*
|
|
* For regular block devices or read operations, use the context plug
|
|
* which may be NULL if blk_start_plug() was not executed.
|
|
*/
|
|
return current->plug;
|
|
}
|
|
|
|
/* Free all requests on the list */
|
|
static inline void blk_mq_free_requests(struct list_head *list)
|
|
{
|
|
while (!list_empty(list)) {
|
|
struct request *rq = list_entry_rq(list->next);
|
|
|
|
list_del_init(&rq->queuelist);
|
|
blk_mq_free_request(rq);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For shared tag users, we track the number of currently active users
|
|
* and attempt to provide a fair share of the tag depth for each of them.
|
|
*/
|
|
static inline bool hctx_may_queue(struct blk_mq_hw_ctx *hctx,
|
|
struct sbitmap_queue *bt)
|
|
{
|
|
unsigned int depth, users;
|
|
|
|
if (!hctx || !(hctx->flags & BLK_MQ_F_TAG_QUEUE_SHARED))
|
|
return true;
|
|
|
|
/*
|
|
* Don't try dividing an ant
|
|
*/
|
|
if (bt->sb.depth == 1)
|
|
return true;
|
|
|
|
if (blk_mq_is_shared_tags(hctx->flags)) {
|
|
struct request_queue *q = hctx->queue;
|
|
|
|
if (!test_bit(QUEUE_FLAG_HCTX_ACTIVE, &q->queue_flags))
|
|
return true;
|
|
} else {
|
|
if (!test_bit(BLK_MQ_S_TAG_ACTIVE, &hctx->state))
|
|
return true;
|
|
}
|
|
|
|
users = atomic_read(&hctx->tags->active_queues);
|
|
|
|
if (!users)
|
|
return true;
|
|
|
|
/*
|
|
* Allow at least some tags
|
|
*/
|
|
depth = max((bt->sb.depth + users - 1) / users, 4U);
|
|
return __blk_mq_active_requests(hctx) < depth;
|
|
}
|
|
|
|
/* run the code block in @dispatch_ops with rcu/srcu read lock held */
|
|
#define __blk_mq_run_dispatch_ops(q, check_sleep, dispatch_ops) \
|
|
do { \
|
|
if ((q)->tag_set->flags & BLK_MQ_F_BLOCKING) { \
|
|
struct blk_mq_tag_set *__tag_set = (q)->tag_set; \
|
|
int srcu_idx; \
|
|
\
|
|
might_sleep_if(check_sleep); \
|
|
srcu_idx = srcu_read_lock(__tag_set->srcu); \
|
|
(dispatch_ops); \
|
|
srcu_read_unlock(__tag_set->srcu, srcu_idx); \
|
|
} else { \
|
|
rcu_read_lock(); \
|
|
(dispatch_ops); \
|
|
rcu_read_unlock(); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define blk_mq_run_dispatch_ops(q, dispatch_ops) \
|
|
__blk_mq_run_dispatch_ops(q, true, dispatch_ops) \
|
|
|
|
#endif
|