1545 lines
45 KiB
C
1545 lines
45 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Portions Copyright (C) 1992 Drew Eckhardt
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*/
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#ifndef _LINUX_BLKDEV_H
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#define _LINUX_BLKDEV_H
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#include <linux/types.h>
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#include <linux/blk_types.h>
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#include <linux/device.h>
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#include <linux/list.h>
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#include <linux/llist.h>
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#include <linux/minmax.h>
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#include <linux/timer.h>
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#include <linux/workqueue.h>
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#include <linux/wait.h>
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#include <linux/bio.h>
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#include <linux/gfp.h>
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#include <linux/kdev_t.h>
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#include <linux/rcupdate.h>
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#include <linux/percpu-refcount.h>
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#include <linux/blkzoned.h>
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#include <linux/sched.h>
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#include <linux/sbitmap.h>
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#include <linux/uuid.h>
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#include <linux/xarray.h>
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struct module;
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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 blkcg_gq;
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struct blk_flush_queue;
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struct kiocb;
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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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struct blk_crypto_profile;
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extern const struct device_type disk_type;
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extern struct device_type part_type;
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extern struct class block_class;
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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 6
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#define DISK_MAX_PARTS 256
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#define DISK_NAME_LEN 32
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#define PARTITION_META_INFO_VOLNAMELTH 64
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/*
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* Enough for the string representation of any kind of UUID plus NULL.
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* EFI UUID is 36 characters. MSDOS UUID is 11 characters.
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*/
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#define PARTITION_META_INFO_UUIDLTH (UUID_STRING_LEN + 1)
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struct partition_meta_info {
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char uuid[PARTITION_META_INFO_UUIDLTH];
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u8 volname[PARTITION_META_INFO_VOLNAMELTH];
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};
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/**
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* DOC: genhd capability flags
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*
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* ``GENHD_FL_REMOVABLE``: indicates that the block device gives access to
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* removable media. When set, the device remains present even when media is not
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* inserted. Shall not be set for devices which are removed entirely when the
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* media is removed.
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*
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* ``GENHD_FL_HIDDEN``: the block device is hidden; it doesn't produce events,
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* doesn't appear in sysfs, and can't be opened from userspace or using
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* blkdev_get*. Used for the underlying components of multipath devices.
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*
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* ``GENHD_FL_NO_PART``: partition support is disabled. The kernel will not
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* scan for partitions from add_disk, and users can't add partitions manually.
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*
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*/
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enum {
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GENHD_FL_REMOVABLE = 1 << 0,
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GENHD_FL_HIDDEN = 1 << 1,
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GENHD_FL_NO_PART = 1 << 2,
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};
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enum {
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DISK_EVENT_MEDIA_CHANGE = 1 << 0, /* media changed */
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DISK_EVENT_EJECT_REQUEST = 1 << 1, /* eject requested */
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};
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enum {
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/* Poll even if events_poll_msecs is unset */
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DISK_EVENT_FLAG_POLL = 1 << 0,
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/* Forward events to udev */
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DISK_EVENT_FLAG_UEVENT = 1 << 1,
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/* Block event polling when open for exclusive write */
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DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE = 1 << 2,
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};
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struct disk_events;
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struct badblocks;
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struct blk_integrity {
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const struct blk_integrity_profile *profile;
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unsigned char flags;
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unsigned char tuple_size;
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unsigned char interval_exp;
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unsigned char tag_size;
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};
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struct gendisk {
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/*
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* major/first_minor/minors should not be set by any new driver, the
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* block core will take care of allocating them automatically.
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*/
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int major;
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int first_minor;
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int minors;
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char disk_name[DISK_NAME_LEN]; /* name of major driver */
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unsigned short events; /* supported events */
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unsigned short event_flags; /* flags related to event processing */
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struct xarray part_tbl;
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struct block_device *part0;
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const struct block_device_operations *fops;
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struct request_queue *queue;
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void *private_data;
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struct bio_set bio_split;
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int flags;
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unsigned long state;
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#define GD_NEED_PART_SCAN 0
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#define GD_READ_ONLY 1
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#define GD_DEAD 2
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#define GD_NATIVE_CAPACITY 3
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#define GD_ADDED 4
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#define GD_SUPPRESS_PART_SCAN 5
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#define GD_OWNS_QUEUE 6
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struct mutex open_mutex; /* open/close mutex */
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unsigned open_partitions; /* number of open partitions */
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struct backing_dev_info *bdi;
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struct kobject queue_kobj; /* the queue/ directory */
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struct kobject *slave_dir;
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#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED
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struct list_head slave_bdevs;
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#endif
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struct timer_rand_state *random;
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atomic_t sync_io; /* RAID */
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struct disk_events *ev;
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#ifdef CONFIG_BLK_DEV_INTEGRITY
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struct kobject integrity_kobj;
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#endif /* CONFIG_BLK_DEV_INTEGRITY */
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#ifdef CONFIG_BLK_DEV_ZONED
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/*
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* Zoned block device information for request dispatch control.
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* nr_zones is the total number of zones of the device. This is always
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* 0 for regular block devices. conv_zones_bitmap is a bitmap of nr_zones
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* bits which indicates if a zone is conventional (bit set) or
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* sequential (bit clear). seq_zones_wlock is a bitmap of nr_zones
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* bits which indicates if a zone is write locked, that is, if a write
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* request targeting the zone was dispatched.
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*
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* Reads of this information must be protected with blk_queue_enter() /
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* blk_queue_exit(). Modifying this information is only allowed while
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* no requests are being processed. See also blk_mq_freeze_queue() and
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* blk_mq_unfreeze_queue().
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*/
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unsigned int nr_zones;
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unsigned int max_open_zones;
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unsigned int max_active_zones;
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unsigned long *conv_zones_bitmap;
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unsigned long *seq_zones_wlock;
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#endif /* CONFIG_BLK_DEV_ZONED */
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#if IS_ENABLED(CONFIG_CDROM)
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struct cdrom_device_info *cdi;
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#endif
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int node_id;
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struct badblocks *bb;
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struct lockdep_map lockdep_map;
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u64 diskseq;
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/*
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* Independent sector access ranges. This is always NULL for
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* devices that do not have multiple independent access ranges.
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*/
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struct blk_independent_access_ranges *ia_ranges;
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};
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static inline bool disk_live(struct gendisk *disk)
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{
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return !inode_unhashed(disk->part0->bd_inode);
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}
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/**
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* disk_openers - returns how many openers are there for a disk
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* @disk: disk to check
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*
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* This returns the number of openers for a disk. Note that this value is only
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* stable if disk->open_mutex is held.
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*
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* Note: Due to a quirk in the block layer open code, each open partition is
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* only counted once even if there are multiple openers.
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*/
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static inline unsigned int disk_openers(struct gendisk *disk)
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{
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return atomic_read(&disk->part0->bd_openers);
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}
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/*
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* The gendisk is refcounted by the part0 block_device, and the bd_device
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* therein is also used for device model presentation in sysfs.
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*/
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#define dev_to_disk(device) \
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(dev_to_bdev(device)->bd_disk)
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#define disk_to_dev(disk) \
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(&((disk)->part0->bd_device))
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#if IS_REACHABLE(CONFIG_CDROM)
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#define disk_to_cdi(disk) ((disk)->cdi)
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#else
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#define disk_to_cdi(disk) NULL
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#endif
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static inline dev_t disk_devt(struct gendisk *disk)
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{
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return MKDEV(disk->major, disk->first_minor);
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}
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static inline int blk_validate_block_size(unsigned long bsize)
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{
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if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize))
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return -EINVAL;
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return 0;
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}
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static inline bool blk_op_is_passthrough(blk_opf_t op)
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{
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op &= REQ_OP_MASK;
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return op == REQ_OP_DRV_IN || op == REQ_OP_DRV_OUT;
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}
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/*
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* Zoned block device models (zoned limit).
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*
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* Note: This needs to be ordered from the least to the most severe
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* restrictions for the inheritance in blk_stack_limits() to work.
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*/
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enum blk_zoned_model {
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BLK_ZONED_NONE = 0, /* 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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/*
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* BLK_BOUNCE_NONE: never bounce (default)
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* BLK_BOUNCE_HIGH: bounce all highmem pages
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*/
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enum blk_bounce {
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BLK_BOUNCE_NONE,
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BLK_BOUNCE_HIGH,
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};
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struct queue_limits {
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enum blk_bounce bounce;
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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_user_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_secure_erase_sectors;
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unsigned int max_write_zeroes_sectors;
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unsigned int max_zone_append_sectors;
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unsigned int discard_granularity;
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unsigned int discard_alignment;
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unsigned int zone_write_granularity;
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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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* Drivers that set dma_alignment to less than 511 must be prepared to
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* handle individual bvec's that are not a multiple of a SECTOR_SIZE
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* due to possible offsets.
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*/
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unsigned int dma_alignment;
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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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void disk_set_zoned(struct gendisk *disk, enum blk_zoned_model model);
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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 bdev_nr_zones(struct block_device *bdev);
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extern int blkdev_zone_mgmt(struct block_device *bdev, enum req_op op,
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sector_t sectors, sector_t nr_sectors,
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gfp_t gfp_mask);
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int blk_revalidate_disk_zones(struct gendisk *disk,
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void (*update_driver_data)(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 bdev_nr_zones(struct block_device *bdev)
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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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/*
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* Independent access ranges: struct blk_independent_access_range describes
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* a range of contiguous sectors that can be accessed using device command
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* execution resources that are independent from the resources used for
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* other access ranges. This is typically found with single-LUN multi-actuator
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* HDDs where each access range is served by a different set of heads.
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* The set of independent ranges supported by the device is defined using
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* struct blk_independent_access_ranges. The independent ranges must not overlap
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* and must include all sectors within the disk capacity (no sector holes
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* allowed).
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* For a device with multiple ranges, requests targeting sectors in different
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* ranges can be executed in parallel. A request can straddle an access range
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* boundary.
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*/
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struct blk_independent_access_range {
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struct kobject kobj;
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sector_t sector;
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sector_t nr_sectors;
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};
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struct blk_independent_access_ranges {
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struct kobject kobj;
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bool sysfs_registered;
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unsigned int nr_ia_ranges;
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struct blk_independent_access_range ia_range[];
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};
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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 percpu_ref q_usage_counter;
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struct blk_queue_stats *stats;
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struct rq_qos *rq_qos;
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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 xarray hctx_table;
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unsigned int nr_hw_queues;
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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 requests are 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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spinlock_t queue_lock;
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struct gendisk *disk;
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refcount_t refs;
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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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enum rpm_status rpm_status;
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#endif
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/*
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* queue settings
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*/
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unsigned long nr_requests; /* Max # of requests */
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unsigned int dma_pad_mask;
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#ifdef CONFIG_BLK_INLINE_ENCRYPTION
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struct blk_crypto_profile *crypto_profile;
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struct kobject *crypto_kobject;
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#endif
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unsigned int rq_timeout;
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int poll_nsec;
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struct blk_stat_callback *poll_cb;
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struct blk_rq_stat *poll_stat;
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struct timer_list timeout;
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struct work_struct timeout_work;
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atomic_t nr_active_requests_shared_tags;
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struct blk_mq_tags *sched_shared_tags;
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struct list_head icq_list;
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#ifdef CONFIG_BLK_CGROUP
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DECLARE_BITMAP (blkcg_pols, BLKCG_MAX_POLS);
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struct blkcg_gq *root_blkg;
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struct list_head blkg_list;
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struct mutex blkcg_mutex;
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#endif
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struct queue_limits limits;
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unsigned int required_elevator_features;
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int node;
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#ifdef CONFIG_BLK_DEV_IO_TRACE
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struct blk_trace __rcu *blk_trace;
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#endif
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/*
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* for flush operations
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*/
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struct blk_flush_queue *fq;
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struct list_head requeue_list;
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spinlock_t requeue_lock;
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struct delayed_work requeue_work;
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struct mutex sysfs_lock;
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struct mutex sysfs_dir_lock;
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/*
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* for reusing dead hctx instance in case of updating
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* nr_hw_queues
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*/
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struct list_head unused_hctx_list;
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spinlock_t unused_hctx_lock;
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int mq_freeze_depth;
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#ifdef CONFIG_BLK_DEV_THROTTLING
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/* Throttle data */
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struct throtl_data *td;
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#endif
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struct rcu_head rcu_head;
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wait_queue_head_t mq_freeze_wq;
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/*
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* Protect concurrent access to q_usage_counter by
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* percpu_ref_kill() and percpu_ref_reinit().
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*/
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struct mutex mq_freeze_lock;
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int quiesce_depth;
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struct blk_mq_tag_set *tag_set;
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struct list_head tag_set_list;
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|
|
|
struct dentry *debugfs_dir;
|
|
struct dentry *sched_debugfs_dir;
|
|
struct dentry *rqos_debugfs_dir;
|
|
/*
|
|
* Serializes all debugfs metadata operations using the above dentries.
|
|
*/
|
|
struct mutex debugfs_mutex;
|
|
|
|
bool mq_sysfs_init_done;
|
|
};
|
|
|
|
/* Keep blk_queue_flag_name[] in sync with the definitions below */
|
|
#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_NOXMERGES 9 /* No extended merges */
|
|
#define QUEUE_FLAG_ADD_RANDOM 10 /* Contributes to random pool */
|
|
#define QUEUE_FLAG_SYNCHRONOUS 11 /* always completes in submit context */
|
|
#define QUEUE_FLAG_SAME_FORCE 12 /* force complete on same CPU */
|
|
#define QUEUE_FLAG_INIT_DONE 14 /* queue is initialized */
|
|
#define QUEUE_FLAG_STABLE_WRITES 15 /* don't modify blks until WB is done */
|
|
#define QUEUE_FLAG_POLL 16 /* IO polling enabled if set */
|
|
#define QUEUE_FLAG_WC 17 /* Write back caching */
|
|
#define QUEUE_FLAG_FUA 18 /* device supports FUA writes */
|
|
#define QUEUE_FLAG_DAX 19 /* device supports DAX */
|
|
#define QUEUE_FLAG_STATS 20 /* track IO start and completion times */
|
|
#define QUEUE_FLAG_REGISTERED 22 /* queue has been registered to a disk */
|
|
#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_HCTX_ACTIVE 28 /* at least one blk-mq hctx is active */
|
|
#define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */
|
|
#define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */
|
|
#define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/
|
|
|
|
#define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \
|
|
(1UL << QUEUE_FLAG_SAME_COMP) | \
|
|
(1UL << QUEUE_FLAG_NOWAIT))
|
|
|
|
void blk_queue_flag_set(unsigned int flag, struct request_queue *q);
|
|
void blk_queue_flag_clear(unsigned int flag, struct request_queue *q);
|
|
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_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_stable_writes(q) \
|
|
test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags)
|
|
#define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags)
|
|
#define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags)
|
|
#define blk_queue_zone_resetall(q) \
|
|
test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags)
|
|
#define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(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_registered(q) test_bit(QUEUE_FLAG_REGISTERED, &(q)->queue_flags)
|
|
#define blk_queue_sq_sched(q) test_bit(QUEUE_FLAG_SQ_SCHED, &(q)->queue_flags)
|
|
#define blk_queue_skip_tagset_quiesce(q) \
|
|
test_bit(QUEUE_FLAG_SKIP_TAGSET_QUIESCE, &(q)->queue_flags)
|
|
|
|
extern void blk_set_pm_only(struct request_queue *q);
|
|
extern void blk_clear_pm_only(struct request_queue *q);
|
|
|
|
#define list_entry_rq(ptr) list_entry((ptr), struct request, queuelist)
|
|
|
|
#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;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static inline enum rpm_status queue_rpm_status(struct request_queue *q)
|
|
{
|
|
return q->rpm_status;
|
|
}
|
|
#else
|
|
static inline enum rpm_status queue_rpm_status(struct request_queue *q)
|
|
{
|
|
return RPM_ACTIVE;
|
|
}
|
|
#endif
|
|
|
|
static inline enum blk_zoned_model
|
|
blk_queue_zoned_model(struct request_queue *q)
|
|
{
|
|
if (IS_ENABLED(CONFIG_BLK_DEV_ZONED))
|
|
return q->limits.zoned;
|
|
return BLK_ZONED_NONE;
|
|
}
|
|
|
|
static inline bool blk_queue_is_zoned(struct request_queue *q)
|
|
{
|
|
switch (blk_queue_zoned_model(q)) {
|
|
case BLK_ZONED_HA:
|
|
case BLK_ZONED_HM:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_BLK_DEV_ZONED
|
|
static inline unsigned int disk_nr_zones(struct gendisk *disk)
|
|
{
|
|
return blk_queue_is_zoned(disk->queue) ? disk->nr_zones : 0;
|
|
}
|
|
|
|
static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector)
|
|
{
|
|
if (!blk_queue_is_zoned(disk->queue))
|
|
return 0;
|
|
return sector >> ilog2(disk->queue->limits.chunk_sectors);
|
|
}
|
|
|
|
static inline bool disk_zone_is_seq(struct gendisk *disk, sector_t sector)
|
|
{
|
|
if (!blk_queue_is_zoned(disk->queue))
|
|
return false;
|
|
if (!disk->conv_zones_bitmap)
|
|
return true;
|
|
return !test_bit(disk_zone_no(disk, sector), disk->conv_zones_bitmap);
|
|
}
|
|
|
|
static inline void disk_set_max_open_zones(struct gendisk *disk,
|
|
unsigned int max_open_zones)
|
|
{
|
|
disk->max_open_zones = max_open_zones;
|
|
}
|
|
|
|
static inline void disk_set_max_active_zones(struct gendisk *disk,
|
|
unsigned int max_active_zones)
|
|
{
|
|
disk->max_active_zones = max_active_zones;
|
|
}
|
|
|
|
static inline unsigned int bdev_max_open_zones(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_disk->max_open_zones;
|
|
}
|
|
|
|
static inline unsigned int bdev_max_active_zones(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_disk->max_active_zones;
|
|
}
|
|
|
|
#else /* CONFIG_BLK_DEV_ZONED */
|
|
static inline unsigned int disk_nr_zones(struct gendisk *disk)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline bool disk_zone_is_seq(struct gendisk *disk, sector_t sector)
|
|
{
|
|
return false;
|
|
}
|
|
static inline unsigned int disk_zone_no(struct gendisk *disk, sector_t sector)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline unsigned int bdev_max_open_zones(struct block_device *bdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline unsigned int bdev_max_active_zones(struct block_device *bdev)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_BLK_DEV_ZONED */
|
|
|
|
static inline unsigned int blk_queue_depth(struct request_queue *q)
|
|
{
|
|
if (q->queue_depth)
|
|
return q->queue_depth;
|
|
|
|
return q->nr_requests;
|
|
}
|
|
|
|
/*
|
|
* default timeout for SG_IO if none specified
|
|
*/
|
|
#define BLK_DEFAULT_SG_TIMEOUT (60 * HZ)
|
|
#define BLK_MIN_SG_TIMEOUT (7 * HZ)
|
|
|
|
/* This should not be used directly - use rq_for_each_segment */
|
|
#define for_each_bio(_bio) \
|
|
for (; _bio; _bio = _bio->bi_next)
|
|
|
|
int __must_check device_add_disk(struct device *parent, struct gendisk *disk,
|
|
const struct attribute_group **groups);
|
|
static inline int __must_check add_disk(struct gendisk *disk)
|
|
{
|
|
return device_add_disk(NULL, disk, NULL);
|
|
}
|
|
void del_gendisk(struct gendisk *gp);
|
|
void invalidate_disk(struct gendisk *disk);
|
|
void set_disk_ro(struct gendisk *disk, bool read_only);
|
|
void disk_uevent(struct gendisk *disk, enum kobject_action action);
|
|
|
|
static inline int get_disk_ro(struct gendisk *disk)
|
|
{
|
|
return disk->part0->bd_read_only ||
|
|
test_bit(GD_READ_ONLY, &disk->state);
|
|
}
|
|
|
|
static inline int bdev_read_only(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_read_only || get_disk_ro(bdev->bd_disk);
|
|
}
|
|
|
|
bool set_capacity_and_notify(struct gendisk *disk, sector_t size);
|
|
bool disk_force_media_change(struct gendisk *disk, unsigned int events);
|
|
|
|
void add_disk_randomness(struct gendisk *disk) __latent_entropy;
|
|
void rand_initialize_disk(struct gendisk *disk);
|
|
|
|
static inline sector_t get_start_sect(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_start_sect;
|
|
}
|
|
|
|
static inline sector_t bdev_nr_sectors(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_nr_sectors;
|
|
}
|
|
|
|
static inline loff_t bdev_nr_bytes(struct block_device *bdev)
|
|
{
|
|
return (loff_t)bdev_nr_sectors(bdev) << SECTOR_SHIFT;
|
|
}
|
|
|
|
static inline sector_t get_capacity(struct gendisk *disk)
|
|
{
|
|
return bdev_nr_sectors(disk->part0);
|
|
}
|
|
|
|
static inline u64 sb_bdev_nr_blocks(struct super_block *sb)
|
|
{
|
|
return bdev_nr_sectors(sb->s_bdev) >>
|
|
(sb->s_blocksize_bits - SECTOR_SHIFT);
|
|
}
|
|
|
|
int bdev_disk_changed(struct gendisk *disk, bool invalidate);
|
|
|
|
void put_disk(struct gendisk *disk);
|
|
struct gendisk *__blk_alloc_disk(int node, struct lock_class_key *lkclass);
|
|
|
|
/**
|
|
* blk_alloc_disk - allocate a gendisk structure
|
|
* @node_id: numa node to allocate on
|
|
*
|
|
* Allocate and pre-initialize a gendisk structure for use with BIO based
|
|
* drivers.
|
|
*
|
|
* Context: can sleep
|
|
*/
|
|
#define blk_alloc_disk(node_id) \
|
|
({ \
|
|
static struct lock_class_key __key; \
|
|
\
|
|
__blk_alloc_disk(node_id, &__key); \
|
|
})
|
|
|
|
int __register_blkdev(unsigned int major, const char *name,
|
|
void (*probe)(dev_t devt));
|
|
#define register_blkdev(major, name) \
|
|
__register_blkdev(major, name, NULL)
|
|
void unregister_blkdev(unsigned int major, const char *name);
|
|
|
|
bool bdev_check_media_change(struct block_device *bdev);
|
|
int __invalidate_device(struct block_device *bdev, bool kill_dirty);
|
|
void set_capacity(struct gendisk *disk, sector_t size);
|
|
|
|
#ifdef CONFIG_BLOCK_HOLDER_DEPRECATED
|
|
int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk);
|
|
void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk);
|
|
#else
|
|
static inline int bd_link_disk_holder(struct block_device *bdev,
|
|
struct gendisk *disk)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void bd_unlink_disk_holder(struct block_device *bdev,
|
|
struct gendisk *disk)
|
|
{
|
|
}
|
|
#endif /* CONFIG_BLOCK_HOLDER_DEPRECATED */
|
|
|
|
dev_t part_devt(struct gendisk *disk, u8 partno);
|
|
void inc_diskseq(struct gendisk *disk);
|
|
dev_t blk_lookup_devt(const char *name, int partno);
|
|
void blk_request_module(dev_t devt);
|
|
|
|
extern int blk_register_queue(struct gendisk *disk);
|
|
extern void blk_unregister_queue(struct gendisk *disk);
|
|
void submit_bio_noacct(struct bio *bio);
|
|
struct bio *bio_split_to_limits(struct bio *bio);
|
|
|
|
extern int blk_lld_busy(struct request_queue *q);
|
|
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);
|
|
|
|
/* Helper to convert REQ_OP_XXX to its string format XXX */
|
|
extern const char *blk_op_str(enum req_op op);
|
|
|
|
int blk_status_to_errno(blk_status_t status);
|
|
blk_status_t errno_to_blk_status(int errno);
|
|
|
|
/* only poll the hardware once, don't continue until a completion was found */
|
|
#define BLK_POLL_ONESHOT (1 << 0)
|
|
/* do not sleep to wait for the expected completion time */
|
|
#define BLK_POLL_NOSLEEP (1 << 1)
|
|
int bio_poll(struct bio *bio, struct io_comp_batch *iob, unsigned int flags);
|
|
int iocb_bio_iopoll(struct kiocb *kiocb, struct io_comp_batch *iob,
|
|
unsigned int flags);
|
|
|
|
static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_queue; /* this is never NULL */
|
|
}
|
|
|
|
/* Helper to convert BLK_ZONE_ZONE_XXX to its string format XXX */
|
|
const char *blk_zone_cond_str(enum blk_zone_cond zone_cond);
|
|
|
|
static inline unsigned int bio_zone_no(struct bio *bio)
|
|
{
|
|
return disk_zone_no(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector);
|
|
}
|
|
|
|
static inline unsigned int bio_zone_is_seq(struct bio *bio)
|
|
{
|
|
return disk_zone_is_seq(bio->bi_bdev->bd_disk, bio->bi_iter.bi_sector);
|
|
}
|
|
|
|
/*
|
|
* Return how much of the chunk is left to be used for I/O at a given offset.
|
|
*/
|
|
static inline unsigned int blk_chunk_sectors_left(sector_t offset,
|
|
unsigned int chunk_sectors)
|
|
{
|
|
if (unlikely(!is_power_of_2(chunk_sectors)))
|
|
return chunk_sectors - sector_div(offset, chunk_sectors);
|
|
return chunk_sectors - (offset & (chunk_sectors - 1));
|
|
}
|
|
|
|
/*
|
|
* Access functions for manipulating queue properties
|
|
*/
|
|
void blk_queue_bounce_limit(struct request_queue *q, enum blk_bounce limit);
|
|
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);
|
|
void blk_queue_max_secure_erase_sectors(struct request_queue *q,
|
|
unsigned int max_sectors);
|
|
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_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_max_zone_append_sectors(struct request_queue *q,
|
|
unsigned int max_zone_append_sectors);
|
|
extern void blk_queue_physical_block_size(struct request_queue *, unsigned int);
|
|
void blk_queue_zone_write_granularity(struct request_queue *q,
|
|
unsigned int size);
|
|
extern void blk_queue_alignment_offset(struct request_queue *q,
|
|
unsigned int alignment);
|
|
void disk_update_readahead(struct gendisk *disk);
|
|
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_stacking_limits(struct queue_limits *lim);
|
|
extern int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
|
|
sector_t offset);
|
|
extern void disk_stack_limits(struct gendisk *disk, struct block_device *bdev,
|
|
sector_t offset);
|
|
extern void blk_queue_update_dma_pad(struct request_queue *, unsigned int);
|
|
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);
|
|
|
|
struct blk_independent_access_ranges *
|
|
disk_alloc_independent_access_ranges(struct gendisk *disk, int nr_ia_ranges);
|
|
void disk_set_independent_access_ranges(struct gendisk *disk,
|
|
struct blk_independent_access_ranges *iars);
|
|
|
|
/*
|
|
* Elevator features for blk_queue_required_elevator_features:
|
|
*/
|
|
/* Supports zoned block devices sequential write constraint */
|
|
#define ELEVATOR_F_ZBD_SEQ_WRITE (1U << 0)
|
|
|
|
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);
|
|
|
|
bool __must_check blk_get_queue(struct request_queue *);
|
|
extern void blk_put_queue(struct request_queue *);
|
|
|
|
void blk_mark_disk_dead(struct gendisk *disk);
|
|
|
|
#ifdef CONFIG_BLOCK
|
|
/*
|
|
* 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. For details, please see schedule() where
|
|
* blk_flush_plug() is called.
|
|
*/
|
|
struct blk_plug {
|
|
struct request *mq_list; /* blk-mq requests */
|
|
|
|
/* if ios_left is > 1, we can batch tag/rq allocations */
|
|
struct request *cached_rq;
|
|
unsigned short nr_ios;
|
|
|
|
unsigned short rq_count;
|
|
|
|
bool multiple_queues;
|
|
bool has_elevator;
|
|
bool nowait;
|
|
|
|
struct list_head cb_list; /* md requires an unplug callback */
|
|
};
|
|
|
|
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_start_plug_nr_ios(struct blk_plug *, unsigned short);
|
|
extern void blk_finish_plug(struct blk_plug *);
|
|
|
|
void __blk_flush_plug(struct blk_plug *plug, bool from_schedule);
|
|
static inline void blk_flush_plug(struct blk_plug *plug, bool async)
|
|
{
|
|
if (plug)
|
|
__blk_flush_plug(plug, async);
|
|
}
|
|
|
|
int blkdev_issue_flush(struct block_device *bdev);
|
|
long nr_blockdev_pages(void);
|
|
#else /* CONFIG_BLOCK */
|
|
struct blk_plug {
|
|
};
|
|
|
|
static inline void blk_start_plug_nr_ios(struct blk_plug *plug,
|
|
unsigned short nr_ios)
|
|
{
|
|
}
|
|
|
|
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 blk_plug *plug, bool async)
|
|
{
|
|
}
|
|
|
|
static inline int blkdev_issue_flush(struct block_device *bdev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline long nr_blockdev_pages(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
extern void blk_io_schedule(void);
|
|
|
|
int blkdev_issue_discard(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask);
|
|
int __blkdev_issue_discard(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp_mask, struct bio **biop);
|
|
int blkdev_issue_secure_erase(struct block_device *bdev, sector_t sector,
|
|
sector_t nr_sects, gfp_t gfp);
|
|
|
|
#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);
|
|
}
|
|
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);
|
|
}
|
|
|
|
static inline bool bdev_is_partition(struct block_device *bdev)
|
|
{
|
|
return bdev->bd_partno;
|
|
}
|
|
|
|
enum blk_default_limits {
|
|
BLK_MAX_SEGMENTS = 128,
|
|
BLK_SAFE_MAX_SECTORS = 255,
|
|
BLK_MAX_SEGMENT_SIZE = 65536,
|
|
BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL,
|
|
};
|
|
|
|
#define BLK_DEF_MAX_SECTORS 2560u
|
|
|
|
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_bytes(struct request_queue *q)
|
|
{
|
|
return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9;
|
|
}
|
|
|
|
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 int queue_max_zone_append_sectors(const struct request_queue *q)
|
|
{
|
|
|
|
const struct queue_limits *l = &q->limits;
|
|
|
|
return min(l->max_zone_append_sectors, l->max_sectors);
|
|
}
|
|
|
|
static inline unsigned int
|
|
bdev_max_zone_append_sectors(struct block_device *bdev)
|
|
{
|
|
return queue_max_zone_append_sectors(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline unsigned int bdev_max_segments(struct block_device *bdev)
|
|
{
|
|
return queue_max_segments(bdev_get_queue(bdev));
|
|
}
|
|
|
|
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 unsigned int
|
|
queue_zone_write_granularity(const struct request_queue *q)
|
|
{
|
|
return q->limits.zone_write_granularity;
|
|
}
|
|
|
|
static inline unsigned int
|
|
bdev_zone_write_granularity(struct block_device *bdev)
|
|
{
|
|
return queue_zone_write_granularity(bdev_get_queue(bdev));
|
|
}
|
|
|
|
int bdev_alignment_offset(struct block_device *bdev);
|
|
unsigned int bdev_discard_alignment(struct block_device *bdev);
|
|
|
|
static inline unsigned int bdev_max_discard_sectors(struct block_device *bdev)
|
|
{
|
|
return bdev_get_queue(bdev)->limits.max_discard_sectors;
|
|
}
|
|
|
|
static inline unsigned int bdev_discard_granularity(struct block_device *bdev)
|
|
{
|
|
return bdev_get_queue(bdev)->limits.discard_granularity;
|
|
}
|
|
|
|
static inline unsigned int
|
|
bdev_max_secure_erase_sectors(struct block_device *bdev)
|
|
{
|
|
return bdev_get_queue(bdev)->limits.max_secure_erase_sectors;
|
|
}
|
|
|
|
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 bool bdev_nonrot(struct block_device *bdev)
|
|
{
|
|
return blk_queue_nonrot(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline bool bdev_synchronous(struct block_device *bdev)
|
|
{
|
|
return test_bit(QUEUE_FLAG_SYNCHRONOUS,
|
|
&bdev_get_queue(bdev)->queue_flags);
|
|
}
|
|
|
|
static inline bool bdev_stable_writes(struct block_device *bdev)
|
|
{
|
|
return test_bit(QUEUE_FLAG_STABLE_WRITES,
|
|
&bdev_get_queue(bdev)->queue_flags);
|
|
}
|
|
|
|
static inline bool bdev_write_cache(struct block_device *bdev)
|
|
{
|
|
return test_bit(QUEUE_FLAG_WC, &bdev_get_queue(bdev)->queue_flags);
|
|
}
|
|
|
|
static inline bool bdev_fua(struct block_device *bdev)
|
|
{
|
|
return test_bit(QUEUE_FLAG_FUA, &bdev_get_queue(bdev)->queue_flags);
|
|
}
|
|
|
|
static inline bool bdev_nowait(struct block_device *bdev)
|
|
{
|
|
return test_bit(QUEUE_FLAG_NOWAIT, &bdev_get_queue(bdev)->queue_flags);
|
|
}
|
|
|
|
static inline enum blk_zoned_model bdev_zoned_model(struct block_device *bdev)
|
|
{
|
|
return blk_queue_zoned_model(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline bool bdev_is_zoned(struct block_device *bdev)
|
|
{
|
|
return blk_queue_is_zoned(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline unsigned int bdev_zone_no(struct block_device *bdev, sector_t sec)
|
|
{
|
|
return disk_zone_no(bdev->bd_disk, sec);
|
|
}
|
|
|
|
static inline bool bdev_op_is_zoned_write(struct block_device *bdev,
|
|
blk_opf_t op)
|
|
{
|
|
if (!bdev_is_zoned(bdev))
|
|
return false;
|
|
|
|
return op == REQ_OP_WRITE || op == REQ_OP_WRITE_ZEROES;
|
|
}
|
|
|
|
static inline sector_t bdev_zone_sectors(struct block_device *bdev)
|
|
{
|
|
struct request_queue *q = bdev_get_queue(bdev);
|
|
|
|
if (!blk_queue_is_zoned(q))
|
|
return 0;
|
|
return q->limits.chunk_sectors;
|
|
}
|
|
|
|
static inline sector_t bdev_offset_from_zone_start(struct block_device *bdev,
|
|
sector_t sector)
|
|
{
|
|
return sector & (bdev_zone_sectors(bdev) - 1);
|
|
}
|
|
|
|
static inline bool bdev_is_zone_start(struct block_device *bdev,
|
|
sector_t sector)
|
|
{
|
|
return bdev_offset_from_zone_start(bdev, sector) == 0;
|
|
}
|
|
|
|
static inline int queue_dma_alignment(const struct request_queue *q)
|
|
{
|
|
return q ? q->limits.dma_alignment : 511;
|
|
}
|
|
|
|
static inline unsigned int bdev_dma_alignment(struct block_device *bdev)
|
|
{
|
|
return queue_dma_alignment(bdev_get_queue(bdev));
|
|
}
|
|
|
|
static inline bool bdev_iter_is_aligned(struct block_device *bdev,
|
|
struct iov_iter *iter)
|
|
{
|
|
return iov_iter_is_aligned(iter, bdev_dma_alignment(bdev),
|
|
bdev_logical_block_size(bdev) - 1);
|
|
}
|
|
|
|
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)
|
|
{
|
|
return order_base_2(size >> SECTOR_SHIFT) + SECTOR_SHIFT;
|
|
}
|
|
|
|
static inline unsigned int block_size(struct block_device *bdev)
|
|
{
|
|
return 1 << bdev->bd_inode->i_blkbits;
|
|
}
|
|
|
|
int kblockd_schedule_work(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) "-*")
|
|
|
|
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
|
|
|
|
bool blk_crypto_register(struct blk_crypto_profile *profile,
|
|
struct request_queue *q);
|
|
|
|
#else /* CONFIG_BLK_INLINE_ENCRYPTION */
|
|
|
|
static inline bool blk_crypto_register(struct blk_crypto_profile *profile,
|
|
struct request_queue *q)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
#endif /* CONFIG_BLK_INLINE_ENCRYPTION */
|
|
|
|
enum blk_unique_id {
|
|
/* these match the Designator Types specified in SPC */
|
|
BLK_UID_T10 = 1,
|
|
BLK_UID_EUI64 = 2,
|
|
BLK_UID_NAA = 3,
|
|
};
|
|
|
|
#define NFL4_UFLG_MASK 0x0000003F
|
|
|
|
struct block_device_operations {
|
|
void (*submit_bio)(struct bio *bio);
|
|
int (*poll_bio)(struct bio *bio, struct io_comp_batch *iob,
|
|
unsigned int flags);
|
|
int (*open) (struct block_device *, fmode_t);
|
|
void (*release) (struct gendisk *, fmode_t);
|
|
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);
|
|
void (*unlock_native_capacity) (struct gendisk *);
|
|
int (*getgeo)(struct block_device *, struct hd_geometry *);
|
|
int (*set_read_only)(struct block_device *bdev, bool ro);
|
|
void (*free_disk)(struct gendisk *disk);
|
|
/* 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);
|
|
char *(*devnode)(struct gendisk *disk, umode_t *mode);
|
|
/* returns the length of the identifier or a negative errno: */
|
|
int (*get_unique_id)(struct gendisk *disk, u8 id[16],
|
|
enum blk_unique_id id_type);
|
|
struct module *owner;
|
|
const struct pr_ops *pr_ops;
|
|
|
|
/*
|
|
* Special callback for probing GPT entry at a given sector.
|
|
* Needed by Android devices, used by GPT scanner and MMC blk
|
|
* driver.
|
|
*/
|
|
int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector);
|
|
};
|
|
|
|
#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
|
|
|
|
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);
|
|
}
|
|
|
|
unsigned long bdev_start_io_acct(struct block_device *bdev, enum req_op op,
|
|
unsigned long start_time);
|
|
void bdev_end_io_acct(struct block_device *bdev, enum req_op op,
|
|
unsigned int sectors, unsigned long start_time);
|
|
|
|
unsigned long bio_start_io_acct(struct bio *bio);
|
|
void bio_end_io_acct_remapped(struct bio *bio, unsigned long start_time,
|
|
struct block_device *orig_bdev);
|
|
|
|
/**
|
|
* bio_end_io_acct - end I/O accounting for bio based drivers
|
|
* @bio: bio to end account for
|
|
* @start_time: start time returned by bio_start_io_acct()
|
|
*/
|
|
static inline void bio_end_io_acct(struct bio *bio, unsigned long start_time)
|
|
{
|
|
return bio_end_io_acct_remapped(bio, start_time, bio->bi_bdev);
|
|
}
|
|
|
|
int bdev_read_only(struct block_device *bdev);
|
|
int set_blocksize(struct block_device *bdev, int size);
|
|
|
|
int lookup_bdev(const char *pathname, dev_t *dev);
|
|
|
|
void blkdev_show(struct seq_file *seqf, off_t offset);
|
|
|
|
#define BDEVNAME_SIZE 32 /* Largest string for a blockdev identifier */
|
|
#define BDEVT_SIZE 10 /* Largest string for MAJ:MIN for blkdev */
|
|
#ifdef CONFIG_BLOCK
|
|
#define BLKDEV_MAJOR_MAX 512
|
|
#else
|
|
#define BLKDEV_MAJOR_MAX 0
|
|
#endif
|
|
|
|
struct block_device *blkdev_get_by_path(const char *path, fmode_t mode,
|
|
void *holder);
|
|
struct block_device *blkdev_get_by_dev(dev_t dev, fmode_t mode, void *holder);
|
|
int bd_prepare_to_claim(struct block_device *bdev, void *holder);
|
|
void bd_abort_claiming(struct block_device *bdev, void *holder);
|
|
void blkdev_put(struct block_device *bdev, fmode_t mode);
|
|
|
|
/* just for blk-cgroup, don't use elsewhere */
|
|
struct block_device *blkdev_get_no_open(dev_t dev);
|
|
void blkdev_put_no_open(struct block_device *bdev);
|
|
|
|
struct block_device *bdev_alloc(struct gendisk *disk, u8 partno);
|
|
void bdev_add(struct block_device *bdev, dev_t dev);
|
|
struct block_device *I_BDEV(struct inode *inode);
|
|
int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart,
|
|
loff_t lend);
|
|
|
|
#ifdef CONFIG_BLOCK
|
|
void invalidate_bdev(struct block_device *bdev);
|
|
int sync_blockdev(struct block_device *bdev);
|
|
int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend);
|
|
int sync_blockdev_nowait(struct block_device *bdev);
|
|
void sync_bdevs(bool wait);
|
|
void bdev_statx_dioalign(struct inode *inode, struct kstat *stat);
|
|
void printk_all_partitions(void);
|
|
#else
|
|
static inline void invalidate_bdev(struct block_device *bdev)
|
|
{
|
|
}
|
|
static inline int sync_blockdev(struct block_device *bdev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline int sync_blockdev_nowait(struct block_device *bdev)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void sync_bdevs(bool wait)
|
|
{
|
|
}
|
|
static inline void bdev_statx_dioalign(struct inode *inode, struct kstat *stat)
|
|
{
|
|
}
|
|
static inline void printk_all_partitions(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_BLOCK */
|
|
|
|
int fsync_bdev(struct block_device *bdev);
|
|
|
|
int freeze_bdev(struct block_device *bdev);
|
|
int thaw_bdev(struct block_device *bdev);
|
|
|
|
struct io_comp_batch {
|
|
struct request *req_list;
|
|
bool need_ts;
|
|
void (*complete)(struct io_comp_batch *);
|
|
};
|
|
|
|
#define DEFINE_IO_COMP_BATCH(name) struct io_comp_batch name = { }
|
|
|
|
#endif /* _LINUX_BLKDEV_H */
|