![Linus Torvalds](/assets/img/avatar_default.png)
This series is slightly unusual because it includes Arnd's compat ioctl tree here:1c46a2cf2d
Merge tag 'block-ioctl-cleanup-5.6' into 5.6/scsi-queue Excluding Arnd's changes, this is mostly an update of the usual drivers: megaraid_sas, mpt3sas, qla2xxx, ufs, lpfc, hisi_sas. There are a couple of core and base updates around error propagation and atomicity in the attribute container base we use for the SCSI transport classes. The rest is minor changes and updates. Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCXjHQJyYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishZZ8AQC02N+v iUnTl1YxGPjIWBbnHuUxN2Qbb9D3C6gAT1LkigEArlk163K3A1XEQHF/VNCdAz/f 01XYTd3p1VHuegIBHlk= =Cn52 -----END PGP SIGNATURE----- Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI updates from James Bottomley: "This series is slightly unusual because it includes Arnd's compat ioctl tree here:1c46a2cf2d
Merge tag 'block-ioctl-cleanup-5.6' into 5.6/scsi-queue Excluding Arnd's changes, this is mostly an update of the usual drivers: megaraid_sas, mpt3sas, qla2xxx, ufs, lpfc, hisi_sas. There are a couple of core and base updates around error propagation and atomicity in the attribute container base we use for the SCSI transport classes. The rest is minor changes and updates" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (149 commits) scsi: hisi_sas: Rename hisi_sas_cq.pci_irq_mask scsi: hisi_sas: Add prints for v3 hw interrupt converge and automatic affinity scsi: hisi_sas: Modify the file permissions of trigger_dump to write only scsi: hisi_sas: Replace magic number when handle channel interrupt scsi: hisi_sas: replace spin_lock_irqsave/spin_unlock_restore with spin_lock/spin_unlock scsi: hisi_sas: use threaded irq to process CQ interrupts scsi: ufs: Use UFS device indicated maximum LU number scsi: ufs: Add max_lu_supported in struct ufs_dev_info scsi: ufs: Delete is_init_prefetch from struct ufs_hba scsi: ufs: Inline two functions into their callers scsi: ufs: Move ufshcd_get_max_pwr_mode() to ufshcd_device_params_init() scsi: ufs: Split ufshcd_probe_hba() based on its called flow scsi: ufs: Delete struct ufs_dev_desc scsi: ufs: Fix ufshcd_probe_hba() reture value in case ufshcd_scsi_add_wlus() fails scsi: ufs-mediatek: enable low-power mode for hibern8 state scsi: ufs: export some functions for vendor usage scsi: ufs-mediatek: add dbg_register_dump implementation scsi: qla2xxx: Fix a NULL pointer dereference in an error path scsi: qla1280: Make checking for 64bit support consistent scsi: megaraid_sas: Update driver version to 07.713.01.00-rc1 ...
1841 lines
52 KiB
C
1841 lines
52 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_BLKDEV_H
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#define _LINUX_BLKDEV_H
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#include <linux/sched.h>
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#include <linux/sched/clock.h>
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#ifdef CONFIG_BLOCK
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#include <linux/major.h>
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#include <linux/genhd.h>
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#include <linux/list.h>
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#include <linux/llist.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <linux/pagemap.h>
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#include <linux/backing-dev-defs.h>
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#include <linux/wait.h>
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#include <linux/mempool.h>
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#include <linux/pfn.h>
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#include <linux/bio.h>
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#include <linux/stringify.h>
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#include <linux/gfp.h>
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#include <linux/bsg.h>
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#include <linux/smp.h>
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#include <linux/rcupdate.h>
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#include <linux/percpu-refcount.h>
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#include <linux/scatterlist.h>
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#include <linux/blkzoned.h>
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struct module;
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struct scsi_ioctl_command;
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struct request_queue;
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struct elevator_queue;
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struct blk_trace;
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struct request;
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struct sg_io_hdr;
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struct bsg_job;
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struct blkcg_gq;
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struct blk_flush_queue;
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struct pr_ops;
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struct rq_qos;
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struct blk_queue_stats;
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struct blk_stat_callback;
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#define BLKDEV_MIN_RQ 4
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#define BLKDEV_MAX_RQ 128 /* Default maximum */
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/* Must be consistent with blk_mq_poll_stats_bkt() */
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#define BLK_MQ_POLL_STATS_BKTS 16
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/* Doing classic polling */
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#define BLK_MQ_POLL_CLASSIC -1
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/*
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* Maximum number of blkcg policies allowed to be registered concurrently.
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* Defined here to simplify include dependency.
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*/
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#define BLKCG_MAX_POLS 5
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typedef void (rq_end_io_fn)(struct request *, blk_status_t);
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/*
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* request flags */
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typedef __u32 __bitwise req_flags_t;
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/* elevator knows about this request */
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#define RQF_SORTED ((__force req_flags_t)(1 << 0))
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/* drive already may have started this one */
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#define RQF_STARTED ((__force req_flags_t)(1 << 1))
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/* may not be passed by ioscheduler */
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#define RQF_SOFTBARRIER ((__force req_flags_t)(1 << 3))
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/* request for flush sequence */
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#define RQF_FLUSH_SEQ ((__force req_flags_t)(1 << 4))
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/* merge of different types, fail separately */
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#define RQF_MIXED_MERGE ((__force req_flags_t)(1 << 5))
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/* track inflight for MQ */
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#define RQF_MQ_INFLIGHT ((__force req_flags_t)(1 << 6))
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/* don't call prep for this one */
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#define RQF_DONTPREP ((__force req_flags_t)(1 << 7))
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/* set for "ide_preempt" requests and also for requests for which the SCSI
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"quiesce" state must be ignored. */
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#define RQF_PREEMPT ((__force req_flags_t)(1 << 8))
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/* contains copies of user pages */
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#define RQF_COPY_USER ((__force req_flags_t)(1 << 9))
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/* vaguely specified driver internal error. Ignored by the block layer */
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#define RQF_FAILED ((__force req_flags_t)(1 << 10))
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/* don't warn about errors */
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#define RQF_QUIET ((__force req_flags_t)(1 << 11))
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/* elevator private data attached */
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#define RQF_ELVPRIV ((__force req_flags_t)(1 << 12))
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/* account into disk and partition IO statistics */
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#define RQF_IO_STAT ((__force req_flags_t)(1 << 13))
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/* request came from our alloc pool */
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#define RQF_ALLOCED ((__force req_flags_t)(1 << 14))
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/* runtime pm request */
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#define RQF_PM ((__force req_flags_t)(1 << 15))
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/* on IO scheduler merge hash */
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#define RQF_HASHED ((__force req_flags_t)(1 << 16))
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/* track IO completion time */
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#define RQF_STATS ((__force req_flags_t)(1 << 17))
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/* Look at ->special_vec for the actual data payload instead of the
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bio chain. */
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#define RQF_SPECIAL_PAYLOAD ((__force req_flags_t)(1 << 18))
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/* The per-zone write lock is held for this request */
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#define RQF_ZONE_WRITE_LOCKED ((__force req_flags_t)(1 << 19))
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/* already slept for hybrid poll */
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#define RQF_MQ_POLL_SLEPT ((__force req_flags_t)(1 << 20))
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/* ->timeout has been called, don't expire again */
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#define RQF_TIMED_OUT ((__force req_flags_t)(1 << 21))
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/* flags that prevent us from merging requests: */
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#define RQF_NOMERGE_FLAGS \
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(RQF_STARTED | RQF_SOFTBARRIER | RQF_FLUSH_SEQ | RQF_SPECIAL_PAYLOAD)
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/*
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* Request state for blk-mq.
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*/
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enum mq_rq_state {
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MQ_RQ_IDLE = 0,
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MQ_RQ_IN_FLIGHT = 1,
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MQ_RQ_COMPLETE = 2,
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};
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/*
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* Try to put the fields that are referenced together in the same cacheline.
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*
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* If you modify this structure, make sure to update blk_rq_init() and
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* especially blk_mq_rq_ctx_init() to take care of the added fields.
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*/
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struct request {
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struct request_queue *q;
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struct blk_mq_ctx *mq_ctx;
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struct blk_mq_hw_ctx *mq_hctx;
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unsigned int cmd_flags; /* op and common flags */
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req_flags_t rq_flags;
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int tag;
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int internal_tag;
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/* the following two fields are internal, NEVER access directly */
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unsigned int __data_len; /* total data len */
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sector_t __sector; /* sector cursor */
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struct bio *bio;
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struct bio *biotail;
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struct list_head queuelist;
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/*
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* The hash is used inside the scheduler, and killed once the
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* request reaches the dispatch list. The ipi_list is only used
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* to queue the request for softirq completion, which is long
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* after the request has been unhashed (and even removed from
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* the dispatch list).
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*/
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union {
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struct hlist_node hash; /* merge hash */
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struct list_head ipi_list;
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};
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/*
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* The rb_node is only used inside the io scheduler, requests
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* are pruned when moved to the dispatch queue. So let the
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* completion_data share space with the rb_node.
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*/
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union {
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struct rb_node rb_node; /* sort/lookup */
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struct bio_vec special_vec;
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void *completion_data;
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int error_count; /* for legacy drivers, don't use */
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};
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/*
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* Three pointers are available for the IO schedulers, if they need
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* more they have to dynamically allocate it. Flush requests are
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* never put on the IO scheduler. So let the flush fields share
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* space with the elevator data.
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*/
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union {
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struct {
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struct io_cq *icq;
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void *priv[2];
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} elv;
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struct {
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unsigned int seq;
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struct list_head list;
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rq_end_io_fn *saved_end_io;
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} flush;
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};
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struct gendisk *rq_disk;
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struct hd_struct *part;
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#ifdef CONFIG_BLK_RQ_ALLOC_TIME
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/* Time that the first bio started allocating this request. */
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u64 alloc_time_ns;
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#endif
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/* Time that this request was allocated for this IO. */
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u64 start_time_ns;
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/* Time that I/O was submitted to the device. */
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u64 io_start_time_ns;
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#ifdef CONFIG_BLK_WBT
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unsigned short wbt_flags;
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#endif
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/*
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* rq sectors used for blk stats. It has the same value
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* with blk_rq_sectors(rq), except that it never be zeroed
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* by completion.
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*/
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unsigned short stats_sectors;
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/*
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* Number of scatter-gather DMA addr+len pairs after
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* physical address coalescing is performed.
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*/
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unsigned short nr_phys_segments;
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#if defined(CONFIG_BLK_DEV_INTEGRITY)
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unsigned short nr_integrity_segments;
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#endif
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unsigned short write_hint;
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unsigned short ioprio;
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unsigned int extra_len; /* length of alignment and padding */
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enum mq_rq_state state;
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refcount_t ref;
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unsigned int timeout;
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unsigned long deadline;
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union {
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struct __call_single_data csd;
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u64 fifo_time;
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};
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/*
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* completion callback.
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*/
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rq_end_io_fn *end_io;
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void *end_io_data;
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};
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static inline bool blk_op_is_scsi(unsigned int op)
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{
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return op == REQ_OP_SCSI_IN || op == REQ_OP_SCSI_OUT;
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}
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static inline bool blk_op_is_private(unsigned int op)
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{
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return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT;
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}
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static inline bool blk_rq_is_scsi(struct request *rq)
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{
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return blk_op_is_scsi(req_op(rq));
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}
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static inline bool blk_rq_is_private(struct request *rq)
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{
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return blk_op_is_private(req_op(rq));
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}
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static inline bool blk_rq_is_passthrough(struct request *rq)
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{
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return blk_rq_is_scsi(rq) || blk_rq_is_private(rq);
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}
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static inline bool bio_is_passthrough(struct bio *bio)
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{
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unsigned op = bio_op(bio);
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return blk_op_is_scsi(op) || blk_op_is_private(op);
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}
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static inline unsigned short req_get_ioprio(struct request *req)
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{
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return req->ioprio;
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}
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#include <linux/elevator.h>
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struct blk_queue_ctx;
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typedef blk_qc_t (make_request_fn) (struct request_queue *q, struct bio *bio);
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struct bio_vec;
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typedef int (dma_drain_needed_fn)(struct request *);
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enum blk_eh_timer_return {
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BLK_EH_DONE, /* drivers has completed the command */
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BLK_EH_RESET_TIMER, /* reset timer and try again */
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};
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enum blk_queue_state {
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Queue_down,
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Queue_up,
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};
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#define BLK_TAG_ALLOC_FIFO 0 /* allocate starting from 0 */
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#define BLK_TAG_ALLOC_RR 1 /* allocate starting from last allocated tag */
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#define BLK_SCSI_MAX_CMDS (256)
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#define BLK_SCSI_CMD_PER_LONG (BLK_SCSI_MAX_CMDS / (sizeof(long) * 8))
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/*
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* Zoned block device models (zoned limit).
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*/
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enum blk_zoned_model {
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BLK_ZONED_NONE, /* Regular block device */
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BLK_ZONED_HA, /* Host-aware zoned block device */
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BLK_ZONED_HM, /* Host-managed zoned block device */
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};
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struct queue_limits {
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unsigned long bounce_pfn;
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unsigned long seg_boundary_mask;
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unsigned long virt_boundary_mask;
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unsigned int max_hw_sectors;
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unsigned int max_dev_sectors;
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unsigned int chunk_sectors;
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unsigned int max_sectors;
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unsigned int max_segment_size;
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unsigned int physical_block_size;
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unsigned int logical_block_size;
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unsigned int alignment_offset;
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unsigned int io_min;
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unsigned int io_opt;
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unsigned int max_discard_sectors;
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unsigned int max_hw_discard_sectors;
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unsigned int max_write_same_sectors;
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unsigned int max_write_zeroes_sectors;
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unsigned int discard_granularity;
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unsigned int discard_alignment;
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unsigned short max_segments;
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unsigned short max_integrity_segments;
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unsigned short max_discard_segments;
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unsigned char misaligned;
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unsigned char discard_misaligned;
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unsigned char raid_partial_stripes_expensive;
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enum blk_zoned_model zoned;
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};
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typedef int (*report_zones_cb)(struct blk_zone *zone, unsigned int idx,
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void *data);
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#ifdef CONFIG_BLK_DEV_ZONED
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#define BLK_ALL_ZONES ((unsigned int)-1)
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int blkdev_report_zones(struct block_device *bdev, sector_t sector,
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unsigned int nr_zones, report_zones_cb cb, void *data);
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unsigned int blkdev_nr_zones(struct gendisk *disk);
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extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_opf op,
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sector_t sectors, sector_t nr_sectors,
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gfp_t gfp_mask);
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extern int blk_revalidate_disk_zones(struct gendisk *disk);
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extern int blkdev_report_zones_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg);
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extern int blkdev_zone_mgmt_ioctl(struct block_device *bdev, fmode_t mode,
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unsigned int cmd, unsigned long arg);
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#else /* CONFIG_BLK_DEV_ZONED */
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static inline unsigned int blkdev_nr_zones(struct gendisk *disk)
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{
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return 0;
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}
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static inline int blkdev_report_zones_ioctl(struct block_device *bdev,
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fmode_t mode, unsigned int cmd,
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unsigned long arg)
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{
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return -ENOTTY;
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}
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static inline int blkdev_zone_mgmt_ioctl(struct block_device *bdev,
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fmode_t mode, unsigned int cmd,
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unsigned long arg)
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{
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return -ENOTTY;
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}
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#endif /* CONFIG_BLK_DEV_ZONED */
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struct request_queue {
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struct request *last_merge;
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struct elevator_queue *elevator;
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struct blk_queue_stats *stats;
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struct rq_qos *rq_qos;
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make_request_fn *make_request_fn;
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dma_drain_needed_fn *dma_drain_needed;
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const struct blk_mq_ops *mq_ops;
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/* sw queues */
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struct blk_mq_ctx __percpu *queue_ctx;
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unsigned int queue_depth;
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/* hw dispatch queues */
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struct blk_mq_hw_ctx **queue_hw_ctx;
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unsigned int nr_hw_queues;
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struct backing_dev_info *backing_dev_info;
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/*
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* The queue owner gets to use this for whatever they like.
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* ll_rw_blk doesn't touch it.
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*/
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void *queuedata;
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/*
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* various queue flags, see QUEUE_* below
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*/
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unsigned long queue_flags;
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/*
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* Number of contexts that have called blk_set_pm_only(). If this
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* counter is above zero then only RQF_PM and RQF_PREEMPT requests are
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* processed.
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*/
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atomic_t pm_only;
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/*
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* ida allocated id for this queue. Used to index queues from
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* ioctx.
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*/
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int id;
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/*
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* queue needs bounce pages for pages above this limit
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*/
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gfp_t bounce_gfp;
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spinlock_t queue_lock;
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/*
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* queue kobject
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*/
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struct kobject kobj;
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/*
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* mq queue kobject
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*/
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struct kobject *mq_kobj;
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#ifdef CONFIG_BLK_DEV_INTEGRITY
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struct blk_integrity integrity;
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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#ifdef CONFIG_PM
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struct device *dev;
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|
int rpm_status;
|
|
unsigned int nr_pending;
|
|
#endif
|
|
|
|
/*
|
|
* queue settings
|
|
*/
|
|
unsigned long nr_requests; /* Max # of requests */
|
|
|
|
unsigned int dma_drain_size;
|
|
void *dma_drain_buffer;
|
|
unsigned int dma_pad_mask;
|
|
unsigned int dma_alignment;
|
|
|
|
unsigned int rq_timeout;
|
|
int poll_nsec;
|
|
|
|
struct blk_stat_callback *poll_cb;
|
|
struct blk_rq_stat poll_stat[BLK_MQ_POLL_STATS_BKTS];
|
|
|
|
struct timer_list timeout;
|
|
struct work_struct timeout_work;
|
|
|
|
struct list_head icq_list;
|
|
#ifdef CONFIG_BLK_CGROUP
|
|
DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS);
|
|
struct blkcg_gq *root_blkg;
|
|
struct list_head blkg_list;
|
|
#endif
|
|
|
|
struct queue_limits limits;
|
|
|
|
unsigned int required_elevator_features;
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
/*
|
|
* Zoned block device information for request dispatch control.
|
|
* nr_zones is the total number of zones of the device. This is always
|
|
* 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
|
|
* bits which indicates if a zone is conventional (bit set) or
|
|
* sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
|
|
* bits which indicates if a zone is write locked, that is, if a write
|
|
* request targeting the zone was dispatched. All three fields are
|
|
* initialized by the low level device driver (e.g. scsi/sd.c).
|
|
* Stacking drivers (device mappers) may or may not initialize
|
|
* these fields.
|
|
*
|
|
* Reads of this information must be protected with blk_queue_enter() /
|
|
* blk_queue_exit(). Modifying this information is only allowed while
|
|
* no requests are being processed. See also blk_mq_freeze_queue() and
|
|
* blk_mq_unfreeze_queue().
|
|
*/
|
|
unsigned int nr_zones;
|
|
unsigned long *conv_zones_bitmap;
|
|
unsigned long *seq_zones_wlock;
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
/*
|
|
* sg stuff
|
|
*/
|
|
unsigned int sg_timeout;
|
|
unsigned int sg_reserved_size;
|
|
int node;
|
|
#ifdef CONFIG_BLK_DEV_IO_TRACE
|
|
struct blk_trace *blk_trace;
|
|
struct mutex blk_trace_mutex;
|
|
#endif
|
|
/*
|
|
* for flush operations
|
|
*/
|
|
struct blk_flush_queue *fq;
|
|
|
|
struct list_head requeue_list;
|
|
spinlock_t requeue_lock;
|
|
struct delayed_work requeue_work;
|
|
|
|
struct mutex sysfs_lock;
|
|
struct mutex sysfs_dir_lock;
|
|
|
|
/*
|
|
* for reusing dead hctx instance in case of updating
|
|
* nr_hw_queues
|
|
*/
|
|
struct list_head unused_hctx_list;
|
|
spinlock_t unused_hctx_lock;
|
|
|
|
int mq_freeze_depth;
|
|
|
|
#if defined(CONFIG_BLK_DEV_BSG)
|
|
struct bsg_class_device bsg_dev;
|
|
#endif
|
|
|
|
#ifdef CONFIG_BLK_DEV_THROTTLING
|
|
/* Throttle data */
|
|
struct throtl_data *td;
|
|
#endif
|
|
struct rcu_head rcu_head;
|
|
wait_queue_head_t mq_freeze_wq;
|
|
/*
|
|
* Protect concurrent access to q_usage_counter by
|
|
* 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;
|
|
struct bio_set bio_split;
|
|
|
|
#ifdef CONFIG_BLK_DEBUG_FS
|
|
struct dentry *debugfs_dir;
|
|
struct dentry *sched_debugfs_dir;
|
|
struct dentry *rqos_debugfs_dir;
|
|
#endif
|
|
|
|
bool mq_sysfs_init_done;
|
|
|
|
size_t cmd_size;
|
|
|
|
struct work_struct release_work;
|
|
|
|
#define BLK_MAX_WRITE_HINTS 5
|
|
u64 write_hints[BLK_MAX_WRITE_HINTS];
|
|
};
|
|
|
|
#define QUEUE_FLAG_STOPPED 0 /* queue is stopped */
|
|
#define QUEUE_FLAG_DYING 1 /* queue being torn down */
|
|
#define QUEUE_FLAG_NOMERGES 3 /* disable merge attempts */
|
|
#define QUEUE_FLAG_SAME_COMP 4 /* complete on same CPU-group */
|
|
#define QUEUE_FLAG_FAIL_IO 5 /* fake timeout */
|
|
#define QUEUE_FLAG_NONROT 6 /* non-rotational device (SSD) */
|
|
#define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */
|
|
#define QUEUE_FLAG_IO_STAT 7 /* do disk/partitions IO accounting */
|
|
#define QUEUE_FLAG_DISCARD 8 /* supports DISCARD */
|
|
#define QUEUE_FLAG_NOXMERGES 9 /* No extended merges */
|
|
#define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
|
|
#define QUEUE_FLAG_SECERASE 11 /* supports secure erase */
|
|
#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_POLL 16 /* IO polling enabled if set */
|
|
#define QUEUE_FLAG_WC 17 /* Write back caching */
|
|
#define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
|
|
#define QUEUE_FLAG_DAX 19 /* device supports DAX */
|
|
#define QUEUE_FLAG_STATS 20 /* track IO start and completion times */
|
|
#define QUEUE_FLAG_POLL_STATS 21 /* collecting stats for hybrid polling */
|
|
#define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */
|
|
#define QUEUE_FLAG_SCSI_PASSTHROUGH 23 /* queue supports SCSI commands */
|
|
#define QUEUE_FLAG_QUIESCED 24 /* queue has been quiesced */
|
|
#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_MQ_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \
|
|
(1 << QUEUE_FLAG_SAME_COMP))
|
|
|
|
void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
|
|
void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
|
|
bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q);
|
|
|
|
#define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags)
|
|
#define blk_queue_dying(q) test_bit(QUEUE_FLAG_DYING, &(q)->queue_flags)
|
|
#define blk_queue_dead(q) test_bit(QUEUE_FLAG_DEAD, &(q)->queue_flags)
|
|
#define blk_queue_init_done(q) test_bit(QUEUE_FLAG_INIT_DONE, &(q)->queue_flags)
|
|
#define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags)
|
|
#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_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)
|
|
#define blk_queue_zone_resetall(q) \
|
|
test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags)
|
|
#define blk_queue_secure_erase(q) \
|
|
(test_bit(QUEUE_FLAG_SECERASE, &(q)->queue_flags))
|
|
#define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags)
|
|
#define blk_queue_scsi_passthrough(q) \
|
|
test_bit(QUEUE_FLAG_SCSI_PASSTHROUGH, &(q)->queue_flags)
|
|
#define blk_queue_pci_p2pdma(q) \
|
|
test_bit(QUEUE_FLAG_PCI_P2PDMA, &(q)->queue_flags)
|
|
#ifdef CONFIG_BLK_RQ_ALLOC_TIME
|
|
#define blk_queue_rq_alloc_time(q) \
|
|
test_bit(QUEUE_FLAG_RQ_ALLOC_TIME, &(q)->queue_flags)
|
|
#else
|
|
#define blk_queue_rq_alloc_time(q) false
|
|
#endif
|
|
|
|
#define blk_noretry_request(rq) \
|
|
((rq)->cmd_flags & (REQ_FAILFAST_DEV|REQ_FAILFAST_TRANSPORT| \
|
|
REQ_FAILFAST_DRIVER))
|
|
#define blk_queue_quiesced(q) test_bit(QUEUE_FLAG_QUIESCED, &(q)->queue_flags)
|
|
#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)
|
|
|
|
extern void blk_set_pm_only(struct request_queue *q);
|
|
extern void blk_clear_pm_only(struct request_queue *q);
|
|
|
|
static inline bool blk_account_rq(struct request *rq)
|
|
{
|
|
return (rq->rq_flags & RQF_STARTED) && !blk_rq_is_passthrough(rq);
|
|
}
|
|
|
|
#define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist)
|
|
|
|
#define rq_data_dir(rq) (op_is_write(req_op(rq)) ? WRITE : READ)
|
|
|
|
#define rq_dma_dir(rq) \
|
|
(op_is_write(req_op(rq)) ? DMA_TO_DEVICE : DMA_FROM_DEVICE)
|
|
|
|
#define dma_map_bvec(dev, bv, dir, attrs) \
|
|
dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \
|
|
(dir), (attrs))
|
|
|
|
static inline bool queue_is_mq(struct request_queue *q)
|
|
{
|
|
return q->mq_ops;
|
|
}
|
|
|
|
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 sector_t blk_queue_zone_sectors(struct request_queue *q)
|
|
{
|
|
return blk_queue_is_zoned(q) ? q->limits.chunk_sectors : 0;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
static inline unsigned int blk_queue_nr_zones(struct request_queue *q)
|
|
{
|
|
return blk_queue_is_zoned(q) ? q->nr_zones : 0;
|
|
}
|
|
|
|
static inline unsigned int blk_queue_zone_no(struct request_queue *q,
|
|
sector_t sector)
|
|
{
|
|
if (!blk_queue_is_zoned(q))
|
|
return 0;
|
|
return sector >> ilog2(q->limits.chunk_sectors);
|
|
}
|
|
|
|
static inline bool blk_queue_zone_is_seq(struct request_queue *q,
|
|
sector_t sector)
|
|
{
|
|
if (!blk_queue_is_zoned(q))
|
|
return false;
|
|
if (!q->conv_zones_bitmap)
|
|
return true;
|
|
return !test_bit(blk_queue_zone_no(q, sector), q->conv_zones_bitmap);
|
|
}
|
|
#else /* CONFIG_BLK_DEV_ZONED */
|
|
static inline unsigned int blk_queue_nr_zones(struct request_queue *q)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
static inline bool rq_is_sync(struct request *rq)
|
|
{
|
|
return op_is_sync(rq->cmd_flags);
|
|
}
|
|
|
|
static inline bool rq_mergeable(struct request *rq)
|
|
{
|
|
if (blk_rq_is_passthrough(rq))
|
|
return false;
|
|
|
|
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;
|
|
}
|
|
|
|
static inline bool blk_write_same_mergeable(struct bio *a, struct bio *b)
|
|
{
|
|
if (bio_page(a) == bio_page(b) &&
|
|
bio_offset(a) == bio_offset(b))
|
|
return true;
|
|
|
|
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;
|
|
}
|
|
|
|
extern unsigned long blk_max_low_pfn, blk_max_pfn;
|
|
|
|
/*
|
|
* standard bounce addresses:
|
|
*
|
|
* BLK_BOUNCE_HIGH : bounce all highmem pages
|
|
* BLK_BOUNCE_ANY : don't bounce anything
|
|
* BLK_BOUNCE_ISA : bounce pages above ISA DMA boundary
|
|
*/
|
|
|
|
#if BITS_PER_LONG == 32
|
|
#define BLK_BOUNCE_HIGH ((u64)blk_max_low_pfn << PAGE_SHIFT)
|
|
#else
|
|
#define BLK_BOUNCE_HIGH -1ULL
|
|
#endif
|
|
#define BLK_BOUNCE_ANY (-1ULL)
|
|
#define BLK_BOUNCE_ISA (DMA_BIT_MASK(24))
|
|
|
|
/*
|
|
* default timeout for SG_IO if none specified
|
|
*/
|
|
#define BLK_DEFAULT_SG_TIMEOUT (60 * HZ)
|
|
#define BLK_MIN_SG_TIMEOUT (7 * HZ)
|
|
|
|
struct rq_map_data {
|
|
struct page **pages;
|
|
int page_order;
|
|
int nr_entries;
|
|
unsigned long offset;
|
|
int null_mapped;
|
|
int from_user;
|
|
};
|
|
|
|
struct req_iterator {
|
|
struct bvec_iter iter;
|
|
struct bio *bio;
|
|
};
|
|
|
|
/* This should not be used directly - use rq_for_each_segment */
|
|
#define for_each_bio(_bio) \
|
|
for (; _bio; _bio = _bio->bi_next)
|
|
#define __rq_for_each_bio(_bio, rq) \
|
|
if ((rq->bio)) \
|
|
for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
|
|
|
|
#define rq_for_each_segment(bvl, _rq, _iter) \
|
|
__rq_for_each_bio(_iter.bio, _rq) \
|
|
bio_for_each_segment(bvl, _iter.bio, _iter.iter)
|
|
|
|
#define rq_for_each_bvec(bvl, _rq, _iter) \
|
|
__rq_for_each_bio(_iter.bio, _rq) \
|
|
bio_for_each_bvec(bvl, _iter.bio, _iter.iter)
|
|
|
|
#define rq_iter_last(bvec, _iter) \
|
|
(_iter.bio->bi_next == NULL && \
|
|
bio_iter_last(bvec, _iter.iter))
|
|
|
|
#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
|
|
# error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
|
|
#endif
|
|
#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
|
|
extern void rq_flush_dcache_pages(struct request *rq);
|
|
#else
|
|
static inline void rq_flush_dcache_pages(struct request *rq)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
extern int blk_register_queue(struct gendisk *disk);
|
|
extern void blk_unregister_queue(struct gendisk *disk);
|
|
extern blk_qc_t generic_make_request(struct bio *bio);
|
|
extern blk_qc_t direct_make_request(struct bio *bio);
|
|
extern void blk_rq_init(struct request_queue *q, struct request *rq);
|
|
extern void blk_put_request(struct request *);
|
|
extern struct request *blk_get_request(struct request_queue *, unsigned int op,
|
|
blk_mq_req_flags_t flags);
|
|
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,
|
|
int (*bio_ctr)(struct bio *, struct bio *, void *),
|
|
void *data);
|
|
extern void blk_rq_unprep_clone(struct request *rq);
|
|
extern blk_status_t blk_insert_cloned_request(struct request_queue *q,
|
|
struct request *rq);
|
|
extern int blk_rq_append_bio(struct request *rq, struct bio **bio);
|
|
extern void blk_queue_split(struct request_queue *, struct bio **);
|
|
extern int scsi_verify_blk_ioctl(struct block_device *, unsigned int);
|
|
extern int scsi_cmd_blk_ioctl(struct block_device *, fmode_t,
|
|
unsigned int, void __user *);
|
|
extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
|
|
unsigned int, void __user *);
|
|
extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
|
|
struct scsi_ioctl_command __user *);
|
|
extern int get_sg_io_hdr(struct sg_io_hdr *hdr, const void __user *argp);
|
|
extern int put_sg_io_hdr(const struct sg_io_hdr *hdr, void __user *argp);
|
|
|
|
extern int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags);
|
|
extern void blk_queue_exit(struct request_queue *q);
|
|
extern void blk_sync_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);
|
|
extern int blk_rq_unmap_user(struct bio *);
|
|
extern int blk_rq_map_kern(struct request_queue *, struct request *, void *, unsigned int, gfp_t);
|
|
extern int blk_rq_map_user_iov(struct request_queue *, struct request *,
|
|
struct rq_map_data *, const struct iov_iter *,
|
|
gfp_t);
|
|
extern void blk_execute_rq(struct request_queue *, struct gendisk *,
|
|
struct request *, int);
|
|
extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
|
|
struct request *, int, rq_end_io_fn *);
|
|
|
|
/* Helper to convert REQ_OP_XXX to its string format XXX */
|
|
extern const char *blk_op_str(unsigned int op);
|
|
|
|
int blk_status_to_errno(blk_status_t status);
|
|
blk_status_t errno_to_blk_status(int errno);
|
|
|
|
int blk_poll(struct request_queue *q, blk_qc_t cookie, bool spin);
|
|
|
|
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_disk->queue; /* this is never NULL */
|
|
}
|
|
|
|
/*
|
|
* The basic unit of block I/O is a sector. It is used in a number of contexts
|
|
* in Linux (blk, bio, genhd). The size of one sector is 512 = 2**9
|
|
* bytes. Variables of type sector_t represent an offset or size that is a
|
|
* multiple of 512 bytes. Hence these two constants.
|
|
*/
|
|
#ifndef SECTOR_SHIFT
|
|
#define SECTOR_SHIFT 9
|
|
#endif
|
|
#ifndef SECTOR_SIZE
|
|
#define SECTOR_SIZE (1 << SECTOR_SHIFT)
|
|
#endif
|
|
|
|
/*
|
|
* blk_rq_pos() : the current sector
|
|
* blk_rq_bytes() : bytes left in the entire request
|
|
* blk_rq_cur_bytes() : bytes left in the current segment
|
|
* blk_rq_err_bytes() : bytes left till the next error boundary
|
|
* blk_rq_sectors() : sectors left in the entire request
|
|
* blk_rq_cur_sectors() : sectors left in the current segment
|
|
* blk_rq_stats_sectors() : sectors of the entire request used for stats
|
|
*/
|
|
static inline sector_t blk_rq_pos(const struct request *rq)
|
|
{
|
|
return rq->__sector;
|
|
}
|
|
|
|
static inline unsigned int blk_rq_bytes(const struct request *rq)
|
|
{
|
|
return rq->__data_len;
|
|
}
|
|
|
|
static inline int blk_rq_cur_bytes(const struct request *rq)
|
|
{
|
|
return rq->bio ? bio_cur_bytes(rq->bio) : 0;
|
|
}
|
|
|
|
extern unsigned int blk_rq_err_bytes(const struct request *rq);
|
|
|
|
static inline unsigned int blk_rq_sectors(const struct request *rq)
|
|
{
|
|
return blk_rq_bytes(rq) >> SECTOR_SHIFT;
|
|
}
|
|
|
|
static inline unsigned int blk_rq_cur_sectors(const struct request *rq)
|
|
{
|
|
return blk_rq_cur_bytes(rq) >> SECTOR_SHIFT;
|
|
}
|
|
|
|
static inline unsigned int blk_rq_stats_sectors(const struct request *rq)
|
|
{
|
|
return rq->stats_sectors;
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
static inline unsigned int blk_rq_zone_no(struct request *rq)
|
|
{
|
|
return blk_queue_zone_no(rq->q, blk_rq_pos(rq));
|
|
}
|
|
|
|
static inline unsigned int blk_rq_zone_is_seq(struct request *rq)
|
|
{
|
|
return blk_queue_zone_is_seq(rq->q, blk_rq_pos(rq));
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
/*
|
|
* Some commands like WRITE SAME have a payload or data transfer size which
|
|
* is different from the size of the request. Any driver that supports such
|
|
* commands using the RQF_SPECIAL_PAYLOAD flag needs to use this helper to
|
|
* calculate the data transfer size.
|
|
*/
|
|
static inline unsigned int blk_rq_payload_bytes(struct request *rq)
|
|
{
|
|
if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
|
|
return rq->special_vec.bv_len;
|
|
return blk_rq_bytes(rq);
|
|
}
|
|
|
|
/*
|
|
* Return the first full biovec in the request. The caller needs to check that
|
|
* there are any bvecs before calling this helper.
|
|
*/
|
|
static inline struct bio_vec req_bvec(struct request *rq)
|
|
{
|
|
if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
|
|
return rq->special_vec;
|
|
return mp_bvec_iter_bvec(rq->bio->bi_io_vec, rq->bio->bi_iter);
|
|
}
|
|
|
|
static inline unsigned int blk_queue_get_max_sectors(struct request_queue *q,
|
|
int op)
|
|
{
|
|
if (unlikely(op == REQ_OP_DISCARD || op == REQ_OP_SECURE_ERASE))
|
|
return min(q->limits.max_discard_sectors,
|
|
UINT_MAX >> SECTOR_SHIFT);
|
|
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Return maximum size of a request at given offset. Only valid for
|
|
* file system requests.
|
|
*/
|
|
static inline unsigned int blk_max_size_offset(struct request_queue *q,
|
|
sector_t offset)
|
|
{
|
|
if (!q->limits.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))));
|
|
}
|
|
|
|
static inline unsigned int blk_rq_get_max_sectors(struct request *rq,
|
|
sector_t offset)
|
|
{
|
|
struct request_queue *q = rq->q;
|
|
|
|
if (blk_rq_is_passthrough(rq))
|
|
return q->limits.max_hw_sectors;
|
|
|
|
if (!q->limits.chunk_sectors ||
|
|
req_op(rq) == REQ_OP_DISCARD ||
|
|
req_op(rq) == REQ_OP_SECURE_ERASE)
|
|
return blk_queue_get_max_sectors(q, req_op(rq));
|
|
|
|
return min(blk_max_size_offset(q, offset),
|
|
blk_queue_get_max_sectors(q, req_op(rq)));
|
|
}
|
|
|
|
static inline unsigned int blk_rq_count_bios(struct request *rq)
|
|
{
|
|
unsigned int nr_bios = 0;
|
|
struct bio *bio;
|
|
|
|
__rq_for_each_bio(bio, rq)
|
|
nr_bios++;
|
|
|
|
return nr_bios;
|
|
}
|
|
|
|
void blk_steal_bios(struct bio_list *list, struct request *rq);
|
|
|
|
/*
|
|
* Request completion related functions.
|
|
*
|
|
* blk_update_request() completes given number of bytes and updates
|
|
* the request without completing it.
|
|
*/
|
|
extern bool blk_update_request(struct request *rq, blk_status_t error,
|
|
unsigned int nr_bytes);
|
|
|
|
extern void __blk_complete_request(struct request *);
|
|
extern void blk_abort_request(struct request *);
|
|
|
|
/*
|
|
* Access functions for manipulating queue properties
|
|
*/
|
|
extern void blk_cleanup_queue(struct request_queue *);
|
|
extern void blk_queue_make_request(struct request_queue *, make_request_fn *);
|
|
extern void blk_queue_bounce_limit(struct request_queue *, u64);
|
|
extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int);
|
|
extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int);
|
|
extern void blk_queue_max_segments(struct request_queue *, unsigned short);
|
|
extern void blk_queue_max_discard_segments(struct request_queue *,
|
|
unsigned short);
|
|
extern void blk_queue_max_segment_size(struct request_queue *, unsigned int);
|
|
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 int);
|
|
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);
|
|
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,
|
|
sector_t offset);
|
|
extern int bdev_stack_limits(struct queue_limits *t, struct block_device *bdev,
|
|
sector_t offset);
|
|
extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
|
|
sector_t offset);
|
|
extern void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b);
|
|
extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int);
|
|
extern int blk_queue_dma_drain(struct request_queue *q,
|
|
dma_drain_needed_fn *dma_drain_needed,
|
|
void *buf, unsigned int size);
|
|
extern void blk_queue_segment_boundary(struct request_queue *, unsigned long);
|
|
extern void blk_queue_virt_boundary(struct request_queue *, unsigned long);
|
|
extern void blk_queue_dma_alignment(struct request_queue *, int);
|
|
extern void blk_queue_update_dma_alignment(struct request_queue *, int);
|
|
extern void blk_queue_rq_timeout(struct request_queue *, unsigned int);
|
|
extern void blk_queue_write_cache(struct request_queue *q, bool enabled, bool fua);
|
|
extern void blk_queue_required_elevator_features(struct request_queue *q,
|
|
unsigned int features);
|
|
extern bool blk_queue_can_use_dma_map_merging(struct request_queue *q,
|
|
struct device *dev);
|
|
|
|
/*
|
|
* Number of physical segments as sent to the device.
|
|
*
|
|
* Normally this is the number of discontiguous data segments sent by the
|
|
* submitter. But for data-less command like discard we might have no
|
|
* actual data segments submitted, but the driver might have to add it's
|
|
* own special payload. In that case we still return 1 here so that this
|
|
* special payload will be mapped.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* Number of discard segments (or ranges) the driver needs to fill in.
|
|
* Each discard bio merged into a request is counted as one segment.
|
|
*/
|
|
static inline unsigned short blk_rq_nr_discard_segments(struct request *rq)
|
|
{
|
|
return max_t(unsigned short, rq->nr_phys_segments, 1);
|
|
}
|
|
|
|
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);
|
|
|
|
bool __must_check blk_get_queue(struct request_queue *);
|
|
struct request_queue *blk_alloc_queue(gfp_t);
|
|
struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id);
|
|
extern void blk_put_queue(struct request_queue *);
|
|
extern void blk_set_queue_dying(struct request_queue *);
|
|
|
|
/*
|
|
* blk_plug permits building a queue of related requests by holding the I/O
|
|
* fragments for a short period. This allows merging of sequential requests
|
|
* into single larger request. As the requests are moved from a per-task list to
|
|
* the device's request_queue in a batch, this results in improved scalability
|
|
* as the lock contention for request_queue lock is reduced.
|
|
*
|
|
* It is ok not to disable preemption when adding the request to the plug list
|
|
* or when attempting a merge, because blk_schedule_flush_list() will only flush
|
|
* the plug list when the task sleeps by itself. For details, please see
|
|
* schedule() where blk_schedule_flush_plug() is called.
|
|
*/
|
|
struct blk_plug {
|
|
struct list_head mq_list; /* blk-mq requests */
|
|
struct list_head cb_list; /* md requires an unplug callback */
|
|
unsigned short rq_count;
|
|
bool multiple_queues;
|
|
};
|
|
#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);
|
|
struct blk_plug_cb {
|
|
struct list_head list;
|
|
blk_plug_cb_fn callback;
|
|
void *data;
|
|
};
|
|
extern struct blk_plug_cb *blk_check_plugged(blk_plug_cb_fn unplug,
|
|
void *data, int size);
|
|
extern void blk_start_plug(struct blk_plug *);
|
|
extern void blk_finish_plug(struct blk_plug *);
|
|
extern void blk_flush_plug_list(struct blk_plug *, bool);
|
|
|
|
static inline void blk_flush_plug(struct task_struct *tsk)
|
|
{
|
|
struct blk_plug *plug = tsk->plug;
|
|
|
|
if (plug)
|
|
blk_flush_plug_list(plug, false);
|
|
}
|
|
|
|
static inline void blk_schedule_flush_plug(struct task_struct *tsk)
|
|
{
|
|
struct blk_plug *plug = tsk->plug;
|
|
|
|
if (plug)
|
|
blk_flush_plug_list(plug, true);
|
|
}
|
|
|
|
static inline bool blk_needs_flush_plug(struct task_struct *tsk)
|
|
{
|
|
struct blk_plug *plug = tsk->plug;
|
|
|
|
return plug &&
|
|
(!list_empty(&plug->mq_list) ||
|
|
!list_empty(&plug->cb_list));
|
|
}
|
|
|
|
extern int blkdev_issue_flush(struct block_device *, gfp_t, sector_t *);
|
|
extern int blkdev_issue_write_same(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, struct page *page);
|
|
|
|
#define BLKDEV_DISCARD_SECURE (1 << 0) /* issue a secure erase */
|
|
|
|
extern int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, unsigned long flags);
|
|
extern int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, int flags,
|
|
struct bio **biop);
|
|
|
|
#define BLKDEV_ZERO_NOUNMAP (1 << 0) /* do not free blocks */
|
|
#define BLKDEV_ZERO_NOFALLBACK (1 << 1) /* don't write explicit zeroes */
|
|
|
|
extern int __blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, struct bio **biop,
|
|
unsigned flags);
|
|
extern int blkdev_issue_zeroout(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, unsigned flags);
|
|
|
|
static inline int sb_issue_discard(struct super_block *sb, sector_t block,
|
|
sector_t nr_blocks, gfp_t gfp_mask, unsigned long flags)
|
|
{
|
|
return blkdev_issue_discard(sb->s_bdev,
|
|
block << (sb->s_blocksize_bits -
|
|
SECTOR_SHIFT),
|
|
nr_blocks << (sb->s_blocksize_bits -
|
|
SECTOR_SHIFT),
|
|
gfp_mask, flags);
|
|
}
|
|
static inline int sb_issue_zeroout(struct super_block *sb, sector_t block,
|
|
sector_t nr_blocks, gfp_t gfp_mask)
|
|
{
|
|
return blkdev_issue_zeroout(sb->s_bdev,
|
|
block << (sb->s_blocksize_bits -
|
|
SECTOR_SHIFT),
|
|
nr_blocks << (sb->s_blocksize_bits -
|
|
SECTOR_SHIFT),
|
|
gfp_mask, 0);
|
|
}
|
|
|
|
extern int blk_verify_command(unsigned char *cmd, fmode_t mode);
|
|
|
|
enum blk_default_limits {
|
|
BLK_MAX_SEGMENTS = 128,
|
|
BLK_SAFE_MAX_SECTORS = 255,
|
|
BLK_DEF_MAX_SECTORS = 2560,
|
|
BLK_MAX_SEGMENT_SIZE = 65536,
|
|
BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL,
|
|
};
|
|
|
|
static inline unsigned long queue_segment_boundary(const struct request_queue *q)
|
|
{
|
|
return q->limits.seg_boundary_mask;
|
|
}
|
|
|
|
static inline unsigned long queue_virt_boundary(const struct request_queue *q)
|
|
{
|
|
return q->limits.virt_boundary_mask;
|
|
}
|
|
|
|
static inline unsigned int queue_max_sectors(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_sectors;
|
|
}
|
|
|
|
static inline unsigned int queue_max_hw_sectors(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_hw_sectors;
|
|
}
|
|
|
|
static inline unsigned short queue_max_segments(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_segments;
|
|
}
|
|
|
|
static inline unsigned short queue_max_discard_segments(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_discard_segments;
|
|
}
|
|
|
|
static inline unsigned int queue_max_segment_size(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_segment_size;
|
|
}
|
|
|
|
static inline unsigned queue_logical_block_size(const struct request_queue *q)
|
|
{
|
|
int retval = 512;
|
|
|
|
if (q && q->limits.logical_block_size)
|
|
retval = q->limits.logical_block_size;
|
|
|
|
return retval;
|
|
}
|
|
|
|
static inline unsigned int bdev_logical_block_size(struct block_device *bdev)
|
|
{
|
|
return queue_logical_block_size(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline unsigned int queue_physical_block_size(const struct request_queue *q)
|
|
{
|
|
return q->limits.physical_block_size;
|
|
}
|
|
|
|
static inline unsigned int bdev_physical_block_size(struct block_device *bdev)
|
|
{
|
|
return queue_physical_block_size(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline unsigned int queue_io_min(const struct request_queue *q)
|
|
{
|
|
return q->limits.io_min;
|
|
}
|
|
|
|
static inline int bdev_io_min(struct block_device *bdev)
|
|
{
|
|
return queue_io_min(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline unsigned int queue_io_opt(const struct request_queue *q)
|
|
{
|
|
return q->limits.io_opt;
|
|
}
|
|
|
|
static inline int bdev_io_opt(struct block_device *bdev)
|
|
{
|
|
return queue_io_opt(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline int queue_alignment_offset(const struct request_queue *q)
|
|
{
|
|
if (q->limits.misaligned)
|
|
return -1;
|
|
|
|
return q->limits.alignment_offset;
|
|
}
|
|
|
|
static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector)
|
|
{
|
|
unsigned int granularity = max(lim->physical_block_size, lim->io_min);
|
|
unsigned int alignment = sector_div(sector, granularity >> SECTOR_SHIFT)
|
|
<< SECTOR_SHIFT;
|
|
|
|
return (granularity + lim->alignment_offset - alignment) % granularity;
|
|
}
|
|
|
|
static inline int bdev_alignment_offset(struct block_device *bdev)
|
|
{
|
|
struct request_queue *q = bdev_get_queue(bdev);
|
|
|
|
if (q->limits.misaligned)
|
|
return -1;
|
|
|
|
if (bdev != bdev->bd_contains)
|
|
return bdev->bd_part->alignment_offset;
|
|
|
|
return q->limits.alignment_offset;
|
|
}
|
|
|
|
static inline int queue_discard_alignment(const struct request_queue *q)
|
|
{
|
|
if (q->limits.discard_misaligned)
|
|
return -1;
|
|
|
|
return q->limits.discard_alignment;
|
|
}
|
|
|
|
static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector)
|
|
{
|
|
unsigned int alignment, granularity, offset;
|
|
|
|
if (!lim->max_discard_sectors)
|
|
return 0;
|
|
|
|
/* Why are these in bytes, not sectors? */
|
|
alignment = lim->discard_alignment >> SECTOR_SHIFT;
|
|
granularity = lim->discard_granularity >> SECTOR_SHIFT;
|
|
if (!granularity)
|
|
return 0;
|
|
|
|
/* Offset of the partition start in 'granularity' sectors */
|
|
offset = sector_div(sector, granularity);
|
|
|
|
/* And why do we do this modulus *again* in blkdev_issue_discard()? */
|
|
offset = (granularity + alignment - offset) % granularity;
|
|
|
|
/* Turn it back into bytes, gaah */
|
|
return offset << SECTOR_SHIFT;
|
|
}
|
|
|
|
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;
|
|
|
|
return q->limits.discard_alignment;
|
|
}
|
|
|
|
static inline unsigned int bdev_write_same(struct block_device *bdev)
|
|
{
|
|
struct request_queue *q = bdev_get_queue(bdev);
|
|
|
|
if (q)
|
|
return q->limits.max_write_same_sectors;
|
|
|
|
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 sector_t bdev_zone_sectors(struct block_device *bdev)
|
|
{
|
|
struct request_queue *q = bdev_get_queue(bdev);
|
|
|
|
if (q)
|
|
return blk_queue_zone_sectors(q);
|
|
return 0;
|
|
}
|
|
|
|
static inline int queue_dma_alignment(const struct request_queue *q)
|
|
{
|
|
return q ? q->dma_alignment : 511;
|
|
}
|
|
|
|
static inline int blk_rq_aligned(struct request_queue *q, unsigned long addr,
|
|
unsigned int len)
|
|
{
|
|
unsigned int alignment = queue_dma_alignment(q) | q->dma_pad_mask;
|
|
return !(addr & alignment) && !(len & alignment);
|
|
}
|
|
|
|
/* assumes size > 256 */
|
|
static inline unsigned int blksize_bits(unsigned int size)
|
|
{
|
|
unsigned int bits = 8;
|
|
do {
|
|
bits++;
|
|
size >>= 1;
|
|
} while (size > 256);
|
|
return bits;
|
|
}
|
|
|
|
static inline unsigned int block_size(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_block_size;
|
|
}
|
|
|
|
typedef struct {struct page *v;} Sector;
|
|
|
|
unsigned char *read_dev_sector(struct block_device *, sector_t, Sector *);
|
|
|
|
static inline void put_dev_sector(Sector p)
|
|
{
|
|
put_page(p.v);
|
|
}
|
|
|
|
int kblockd_schedule_work(struct work_struct *work);
|
|
int kblockd_schedule_work_on(int cpu, struct work_struct *work);
|
|
int kblockd_mod_delayed_work_on(int cpu, struct delayed_work *dwork, unsigned long delay);
|
|
|
|
#define MODULE_ALIAS_BLOCKDEV(major,minor) \
|
|
MODULE_ALIAS("block-major-" __stringify(major) "-" __stringify(minor))
|
|
#define MODULE_ALIAS_BLOCKDEV_MAJOR(major) \
|
|
MODULE_ALIAS("block-major-" __stringify(major) "-*")
|
|
|
|
#if defined(CONFIG_BLK_DEV_INTEGRITY)
|
|
|
|
enum blk_integrity_flags {
|
|
BLK_INTEGRITY_VERIFY = 1 << 0,
|
|
BLK_INTEGRITY_GENERATE = 1 << 1,
|
|
BLK_INTEGRITY_DEVICE_CAPABLE = 1 << 2,
|
|
BLK_INTEGRITY_IP_CHECKSUM = 1 << 3,
|
|
};
|
|
|
|
struct blk_integrity_iter {
|
|
void *prot_buf;
|
|
void *data_buf;
|
|
sector_t seed;
|
|
unsigned int data_size;
|
|
unsigned short interval;
|
|
const char *disk_name;
|
|
};
|
|
|
|
typedef blk_status_t (integrity_processing_fn) (struct blk_integrity_iter *);
|
|
typedef void (integrity_prepare_fn) (struct request *);
|
|
typedef void (integrity_complete_fn) (struct request *, unsigned int);
|
|
|
|
struct blk_integrity_profile {
|
|
integrity_processing_fn *generate_fn;
|
|
integrity_processing_fn *verify_fn;
|
|
integrity_prepare_fn *prepare_fn;
|
|
integrity_complete_fn *complete_fn;
|
|
const char *name;
|
|
};
|
|
|
|
extern void blk_integrity_register(struct gendisk *, struct blk_integrity *);
|
|
extern void blk_integrity_unregister(struct gendisk *);
|
|
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)
|
|
{
|
|
struct blk_integrity *bi = &disk->queue->integrity;
|
|
|
|
if (!bi->profile)
|
|
return NULL;
|
|
|
|
return bi;
|
|
}
|
|
|
|
static inline
|
|
struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
|
|
{
|
|
return blk_get_integrity(bdev->bd_disk);
|
|
}
|
|
|
|
static inline bool blk_integrity_rq(struct request *rq)
|
|
{
|
|
return rq->cmd_flags & REQ_INTEGRITY;
|
|
}
|
|
|
|
static inline void blk_queue_max_integrity_segments(struct request_queue *q,
|
|
unsigned int segs)
|
|
{
|
|
q->limits.max_integrity_segments = segs;
|
|
}
|
|
|
|
static inline unsigned short
|
|
queue_max_integrity_segments(const struct request_queue *q)
|
|
{
|
|
return q->limits.max_integrity_segments;
|
|
}
|
|
|
|
/**
|
|
* bio_integrity_intervals - Return number of integrity intervals for a bio
|
|
* @bi: blk_integrity profile for device
|
|
* @sectors: Size of the bio in 512-byte sectors
|
|
*
|
|
* Description: The block layer calculates everything in 512 byte
|
|
* sectors but integrity metadata is done in terms of the data integrity
|
|
* interval size of the storage device. Convert the block layer sectors
|
|
* to the appropriate number of integrity intervals.
|
|
*/
|
|
static inline unsigned int bio_integrity_intervals(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return sectors >> (bi->interval_exp - 9);
|
|
}
|
|
|
|
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return bio_integrity_intervals(bi, sectors) * bi->tuple_size;
|
|
}
|
|
|
|
/*
|
|
* Return the first bvec that contains integrity data. Only drivers that are
|
|
* limited to a single integrity segment should use this helper.
|
|
*/
|
|
static inline struct bio_vec *rq_integrity_vec(struct request *rq)
|
|
{
|
|
if (WARN_ON_ONCE(queue_max_integrity_segments(rq->q) > 1))
|
|
return NULL;
|
|
return rq->bio->bi_integrity->bip_vec;
|
|
}
|
|
|
|
#else /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
struct bio;
|
|
struct block_device;
|
|
struct gendisk;
|
|
struct blk_integrity;
|
|
|
|
static inline int blk_integrity_rq(struct request *rq)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int blk_rq_count_integrity_sg(struct request_queue *q,
|
|
struct bio *b)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int blk_rq_map_integrity_sg(struct request_queue *q,
|
|
struct bio *b,
|
|
struct scatterlist *s)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline struct blk_integrity *bdev_get_integrity(struct block_device *b)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline struct blk_integrity *blk_get_integrity(struct gendisk *disk)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline int blk_integrity_compare(struct gendisk *a, struct gendisk *b)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void blk_integrity_register(struct gendisk *d,
|
|
struct blk_integrity *b)
|
|
{
|
|
}
|
|
static inline void blk_integrity_unregister(struct gendisk *d)
|
|
{
|
|
}
|
|
static inline void blk_queue_max_integrity_segments(struct request_queue *q,
|
|
unsigned int segs)
|
|
{
|
|
}
|
|
static inline unsigned short queue_max_integrity_segments(const struct request_queue *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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi,
|
|
unsigned int sectors)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct bio_vec *rq_integrity_vec(struct request *rq)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_DEV_INTEGRITY */
|
|
|
|
struct block_device_operations {
|
|
int (*open) (struct block_device *, fmode_t);
|
|
void (*release) (struct gendisk *, fmode_t);
|
|
int (*rw_page)(struct block_device *, sector_t, struct page *, unsigned int);
|
|
int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
|
|
int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
|
|
unsigned int (*check_events) (struct gendisk *disk,
|
|
unsigned int clearing);
|
|
/* ->media_changed() is DEPRECATED, use ->check_events() instead */
|
|
int (*media_changed) (struct gendisk *);
|
|
void (*unlock_native_capacity) (struct gendisk *);
|
|
int (*revalidate_disk) (struct gendisk *);
|
|
int (*getgeo)(struct block_device *, struct hd_geometry *);
|
|
/* this callback is with swap_lock and sometimes page table lock held */
|
|
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
|
|
int (*report_zones)(struct gendisk *, sector_t sector,
|
|
unsigned int nr_zones, report_zones_cb cb, void *data);
|
|
struct module *owner;
|
|
const struct pr_ops *pr_ops;
|
|
};
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
extern int blkdev_compat_ptr_ioctl(struct block_device *, fmode_t,
|
|
unsigned int, unsigned long);
|
|
#else
|
|
#define blkdev_compat_ptr_ioctl NULL
|
|
#endif
|
|
|
|
extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
|
|
unsigned long);
|
|
extern int bdev_read_page(struct block_device *, sector_t, struct page *);
|
|
extern int bdev_write_page(struct block_device *, sector_t, struct page *,
|
|
struct writeback_control *);
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
bool blk_req_needs_zone_write_lock(struct request *rq);
|
|
void __blk_req_zone_write_lock(struct request *rq);
|
|
void __blk_req_zone_write_unlock(struct request *rq);
|
|
|
|
static inline void blk_req_zone_write_lock(struct request *rq)
|
|
{
|
|
if (blk_req_needs_zone_write_lock(rq))
|
|
__blk_req_zone_write_lock(rq);
|
|
}
|
|
|
|
static inline void blk_req_zone_write_unlock(struct request *rq)
|
|
{
|
|
if (rq->rq_flags & RQF_ZONE_WRITE_LOCKED)
|
|
__blk_req_zone_write_unlock(rq);
|
|
}
|
|
|
|
static inline bool blk_req_zone_is_write_locked(struct request *rq)
|
|
{
|
|
return rq->q->seq_zones_wlock &&
|
|
test_bit(blk_rq_zone_no(rq), rq->q->seq_zones_wlock);
|
|
}
|
|
|
|
static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
|
|
{
|
|
if (!blk_req_needs_zone_write_lock(rq))
|
|
return true;
|
|
return !blk_req_zone_is_write_locked(rq);
|
|
}
|
|
#else
|
|
static inline bool blk_req_needs_zone_write_lock(struct request *rq)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline void blk_req_zone_write_lock(struct request *rq)
|
|
{
|
|
}
|
|
|
|
static inline void blk_req_zone_write_unlock(struct request *rq)
|
|
{
|
|
}
|
|
static inline bool blk_req_zone_is_write_locked(struct request *rq)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline bool blk_req_can_dispatch_to_zone(struct request *rq)
|
|
{
|
|
return true;
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
#else /* CONFIG_BLOCK */
|
|
|
|
struct block_device;
|
|
|
|
/*
|
|
* stubs for when the block layer is configured out
|
|
*/
|
|
#define buffer_heads_over_limit 0
|
|
|
|
static inline long nr_blockdev_pages(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct blk_plug {
|
|
};
|
|
|
|
static inline void blk_start_plug(struct blk_plug *plug)
|
|
{
|
|
}
|
|
|
|
static inline void blk_finish_plug(struct blk_plug *plug)
|
|
{
|
|
}
|
|
|
|
static inline void blk_flush_plug(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
static inline void blk_schedule_flush_plug(struct task_struct *task)
|
|
{
|
|
}
|
|
|
|
|
|
static inline bool blk_needs_flush_plug(struct task_struct *tsk)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
|
|
sector_t *error_sector)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
static inline void blk_wake_io_task(struct task_struct *waiter)
|
|
{
|
|
/*
|
|
* If we're polling, the task itself is doing the completions. For
|
|
* that case, we don't need to signal a wakeup, it's enough to just
|
|
* mark us as RUNNING.
|
|
*/
|
|
if (waiter == current)
|
|
__set_current_state(TASK_RUNNING);
|
|
else
|
|
wake_up_process(waiter);
|
|
}
|
|
|
|
#endif
|