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/linux/block/
H A Dgenhd.c59 void set_capacity(struct gendisk *disk, sector_t sectors) in set_capacity() argument
63 disk->disk_name, sectors, in set_capacity()
68 bdev_set_nr_sectors(disk->part0, sectors); in set_capacity()
76 bool set_capacity_and_notify(struct gendisk *disk, sector_t size) in set_capacity_and_notify() argument
78 sector_t capacity = get_capacity(disk); in set_capacity_and_notify()
81 set_capacity(disk, size); in set_capacity_and_notify()
89 !disk_live(disk) || in set_capacity_and_notify()
90 (disk->flags & GENHD_FL_HIDDEN)) in set_capacity_and_notify()
94 disk->disk_name, capacity, size); in set_capacity_and_notify()
102 kobject_uevent_env(&disk_to_dev(disk)->kobj, KOBJ_CHANGE, envp); in set_capacity_and_notify()
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H A Ddisk-events.c12 struct gendisk *disk; /* the associated disk */ member
41 static unsigned long disk_events_poll_jiffies(struct gendisk *disk) in disk_events_poll_jiffies() argument
43 struct disk_events *ev = disk->ev; in disk_events_poll_jiffies()
52 else if (disk->event_flags & DISK_EVENT_FLAG_POLL) in disk_events_poll_jiffies()
73 void disk_block_events(struct gendisk *disk) in disk_block_events() argument
75 struct disk_events *ev = disk->ev; in disk_block_events()
93 cancel_delayed_work_sync(&disk->ev->dwork); in disk_block_events()
98 static void __disk_unblock_events(struct gendisk *disk, bool check_now) in __disk_unblock_events() argument
100 struct disk_events *ev = disk->ev; in __disk_unblock_events()
112 intv = disk_events_poll_jiffies(disk); in __disk_unblock_events()
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H A Dblk-zoned.c68 struct gendisk *disk; member
77 static inline bool disk_need_zone_resources(struct gendisk *disk) in disk_need_zone_resources() argument
86 return queue_is_mq(disk->queue) || in disk_need_zone_resources()
87 queue_emulates_zone_append(disk->queue); in disk_need_zone_resources()
90 static inline unsigned int disk_zone_wplugs_hash_size(struct gendisk *disk) in disk_zone_wplugs_hash_size() argument
92 return 1U << disk->zone_wplugs_hash_bits; in disk_zone_wplugs_hash_size()
156 static void disk_zone_set_cond(struct gendisk *disk, sector_t sector, in disk_zone_set_cond() argument
162 zones_cond = rcu_dereference(disk->zones_cond); in disk_zone_set_cond()
164 unsigned int zno = disk_zone_no(disk, sector); in disk_zone_set_cond()
193 struct gendisk *disk = bdev->bd_disk; in bdev_zone_is_seq() local
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H A Dblk-sysfs.c25 ssize_t (*show)(struct gendisk *disk, char *page);
26 ssize_t (*show_limit)(struct gendisk *disk, char *page);
28 ssize_t (*store)(struct gendisk *disk, const char *page, size_t count);
29 int (*store_limit)(struct gendisk *disk, const char *page,
54 static ssize_t queue_requests_show(struct gendisk *disk, char *page) in queue_requests_show() argument
58 mutex_lock(&disk->queue->elevator_lock); in queue_requests_show()
59 ret = queue_var_show(disk->queue->nr_requests, page); in queue_requests_show()
60 mutex_unlock(&disk->queue->elevator_lock); in queue_requests_show()
65 queue_requests_store(struct gendisk *disk, const char *page, size_t count) in queue_requests_store() argument
67 struct request_queue *q = disk->queue; in queue_requests_store()
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H A Dblk-ia-ranges.c108 int disk_register_independent_access_ranges(struct gendisk *disk) in disk_register_independent_access_ranges() argument
110 struct blk_independent_access_ranges *iars = disk->ia_ranges; in disk_register_independent_access_ranges()
111 struct request_queue *q = disk->queue; in disk_register_independent_access_ranges()
125 &disk->queue_kobj, "%s", in disk_register_independent_access_ranges()
128 disk->ia_ranges = NULL; in disk_register_independent_access_ranges()
151 void disk_unregister_independent_access_ranges(struct gendisk *disk) in disk_unregister_independent_access_ranges() argument
153 struct request_queue *q = disk->queue; in disk_unregister_independent_access_ranges()
154 struct blk_independent_access_ranges *iars = disk->ia_ranges; in disk_unregister_independent_access_ranges()
171 disk->ia_ranges = NULL; in disk_unregister_independent_access_ranges()
191 static bool disk_check_ia_ranges(struct gendisk *disk, in disk_check_ia_ranges() argument
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H A Dholder.c14 struct gendisk *disk) in bd_find_holder_disk() argument
18 list_for_each_entry(holder, &disk->slave_bdevs, list) in bd_find_holder_disk()
62 int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk) in bd_link_disk_holder() argument
67 if (WARN_ON_ONCE(!disk->slave_dir)) in bd_link_disk_holder()
70 if (bdev->bd_disk == disk) in bd_link_disk_holder()
88 holder = bd_find_holder_disk(bdev, disk); in bd_link_disk_holder()
105 ret = add_symlink(disk->slave_dir, bdev_kobj(bdev)); in bd_link_disk_holder()
108 ret = add_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj); in bd_link_disk_holder()
111 list_add(&holder->list, &disk->slave_bdevs); in bd_link_disk_holder()
117 del_symlink(disk->slave_dir, bdev_kobj(bdev)); in bd_link_disk_holder()
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H A Dblk-wbt.h7 void wbt_init_enable_default(struct gendisk *disk);
8 void wbt_disable_default(struct gendisk *disk);
9 void wbt_enable_default(struct gendisk *disk);
13 int wbt_set_lat(struct gendisk *disk, s64 val);
17 static inline void wbt_init_enable_default(struct gendisk *disk) in wbt_init_enable_default() argument
21 static inline void wbt_disable_default(struct gendisk *disk) in wbt_disable_default() argument
24 static inline void wbt_enable_default(struct gendisk *disk) in wbt_enable_default() argument
/linux/block/partitions/
H A Dcore.c133 state->disk = hd; in check_partition()
294 static struct block_device *add_partition(struct gendisk *disk, int partno, in add_partition() argument
299 struct device *ddev = disk_to_dev(disk); in add_partition()
305 lockdep_assert_held(&disk->open_mutex); in add_partition()
314 if (bdev_is_zoned(disk->part0)) { in add_partition()
316 disk->disk_name); in add_partition()
320 if (xa_load(&disk->part_tbl, partno)) in add_partition()
324 get_device(disk_to_dev(disk)); in add_partition()
327 bdev = bdev_alloc(disk, partno); in add_partition()
347 if (bdev_partno(bdev) < disk->minors) { in add_partition()
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/linux/drivers/md/
H A Ddm-zone.c37 args->next_sector < get_capacity(md->disk)); in dm_blk_do_report_zones()
47 int dm_blk_report_zones(struct gendisk *disk, sector_t sector, in dm_blk_report_zones() argument
51 struct mapped_device *md = disk->private_data; in dm_blk_report_zones()
77 .disk = md->disk, in dm_blk_report_zones()
128 return disk_report_zone(args->disk, zone, args->zone_idx++, in dm_report_zones_cb()
175 struct gendisk *disk = md->disk; in dm_revalidate_zones() local
176 unsigned int nr_zones = disk->nr_zones; in dm_revalidate_zones()
179 if (!get_capacity(disk)) in dm_revalidate_zones()
189 DMINFO("%s using %s zone append", disk->disk_name, in dm_revalidate_zones()
199 ret = blk_revalidate_disk_zones(disk); in dm_revalidate_zones()
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H A Ddm-era-target.c203 struct superblock_disk *disk = dm_block_data(b); in sb_prepare_for_write() local
205 disk->blocknr = cpu_to_le64(dm_block_location(b)); in sb_prepare_for_write()
206 disk->csum = cpu_to_le32(dm_bm_checksum(&disk->flags, in sb_prepare_for_write()
211 static int check_metadata_version(struct superblock_disk *disk) in check_metadata_version() argument
213 uint32_t metadata_version = le32_to_cpu(disk->version); in check_metadata_version()
228 struct superblock_disk *disk = dm_block_data(b); in sb_check() local
231 if (dm_block_location(b) != le64_to_cpu(disk->blocknr)) { in sb_check()
233 __func__, le64_to_cpu(disk->blocknr), in sb_check()
238 if (le64_to_cpu(disk->magic) != SUPERBLOCK_MAGIC) { in sb_check()
240 __func__, le64_to_cpu(disk->magic), in sb_check()
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/linux/Documentation/admin-guide/
H A Ddevices.txt20 1 block RAM disk
21 0 = /dev/ram0 First RAM disk
22 1 = /dev/ram1 Second RAM disk
24 250 = /dev/initrd Initial RAM disk
27 /dev/initrd refers to a RAM disk which was preloaded
115 3 block First MFM, RLL and IDE hard disk/CD-ROM interface
116 0 = /dev/hda Master: whole disk (or CD-ROM)
117 64 = /dev/hdb Slave: whole disk (or CD-ROM)
119 For partitions, add to the whole disk device number:
120 0 = /dev/hd? Whole disk
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/linux/arch/m68k/emu/
H A Dnfblock.c57 struct gendisk *disk; member
80 static int nfhd_getgeo(struct gendisk *disk, struct hd_geometry *geo) in nfhd_getgeo() argument
82 struct nfhd_device *dev = disk->private_data; in nfhd_getgeo()
124 dev->disk = blk_alloc_disk(&lim, NUMA_NO_NODE); in nfhd_init_one()
125 if (IS_ERR(dev->disk)) { in nfhd_init_one()
126 err = PTR_ERR(dev->disk); in nfhd_init_one()
130 dev->disk->major = major_num; in nfhd_init_one()
131 dev->disk->first_minor = dev_id * 16; in nfhd_init_one()
132 dev->disk->minors = 16; in nfhd_init_one()
133 dev->disk->fops = &nfhd_ops; in nfhd_init_one()
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/linux/include/linux/
H A Dblkdev.h237 static inline unsigned int disk_openers(struct gendisk *disk) in disk_openers() argument
239 return atomic_read(&disk->part0->bd_openers); in disk_openers()
249 static inline bool disk_has_partscan(struct gendisk *disk) in disk_has_partscan() argument
251 return !(disk->flags & (GENHD_FL_NO_PART | GENHD_FL_HIDDEN)) && in disk_has_partscan()
252 !test_bit(GD_SUPPRESS_PART_SCAN, &disk->state); in disk_has_partscan()
261 #define disk_to_dev(disk) \ argument
262 (&((disk)->part0->bd_device))
265 #define disk_to_cdi(disk) ((disk)->cdi) argument
267 #define disk_to_cdi(disk) NULL argument
270 static inline dev_t disk_devt(struct gendisk *disk) in disk_devt() argument
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/linux/drivers/block/null_blk/
H A Dtrace.h24 static inline void __assign_disk_name(char *name, struct gendisk *disk) in __assign_disk_name() argument
26 if (disk) in __assign_disk_name()
27 memcpy(name, disk->disk_name, DISK_NAME_LEN); in __assign_disk_name()
38 __array(char, disk, DISK_NAME_LEN)
52 __assign_disk_name(__entry->disk,
53 blk_mq_rq_from_pdu(cmd)->q->disk);
56 __print_disk_name(__entry->disk),
66 __array(char, disk, DISK_NAME_LEN)
71 __assign_disk_name(__entry->disk, nullb->disk);
74 __print_disk_name(__entry->disk), __entry->nr_zones)
/linux/drivers/block/
H A Dn64cart.c121 struct gendisk *disk; in n64cart_probe() local
138 disk = blk_alloc_disk(&lim, NUMA_NO_NODE); in n64cart_probe()
139 if (IS_ERR(disk)) { in n64cart_probe()
140 err = PTR_ERR(disk); in n64cart_probe()
144 disk->first_minor = 0; in n64cart_probe()
145 disk->flags = GENHD_FL_NO_PART; in n64cart_probe()
146 disk->fops = &n64cart_fops; in n64cart_probe()
147 disk->private_data = &pdev->dev; in n64cart_probe()
148 strcpy(disk->disk_name, "n64cart"); in n64cart_probe()
150 set_capacity(disk, size >> SECTOR_SHIFT); in n64cart_probe()
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H A Dz2ram.c143 static int z2_open(struct gendisk *disk, blk_mode_t mode) in z2_open() argument
145 int device = disk->first_minor; in z2_open()
290 static void z2_release(struct gendisk *disk) in z2_release() argument
317 struct gendisk *disk; in z2ram_register_disk() local
320 disk = blk_mq_alloc_disk(&tag_set, NULL, NULL); in z2ram_register_disk()
321 if (IS_ERR(disk)) in z2ram_register_disk()
322 return PTR_ERR(disk); in z2ram_register_disk()
324 disk->major = Z2RAM_MAJOR; in z2ram_register_disk()
325 disk->first_minor = minor; in z2ram_register_disk()
326 disk->minors = 1; in z2ram_register_disk()
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H A Dataflop.c301 struct gendisk *disk[NUM_DISK_MINORS]; member
450 static int floppy_open(struct gendisk *disk, blk_mode_t mode);
451 static void floppy_release(struct gendisk *disk);
761 q = unit[drive].disk[type]->queue; in do_format()
1185 set_capacity(unit[SelectedDrive].disk[0], in fd_rwsec_done1()
1200 set_capacity(unit[SelectedDrive].disk[0], in fd_rwsec_done1()
1436 static unsigned int floppy_check_events(struct gendisk *disk, in floppy_check_events() argument
1439 struct atari_floppy_struct *p = disk->private_data; in floppy_check_events()
1459 static int floppy_revalidate(struct gendisk *disk) in floppy_revalidate() argument
1461 struct atari_floppy_struct *p = disk->private_data; in floppy_revalidate()
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/linux/drivers/nvme/host/
H A Dmultipath.c113 if (h->disk) in nvme_mpath_unfreeze()
114 blk_mq_unfreeze_queue_nomemrestore(h->disk->queue); in nvme_mpath_unfreeze()
123 if (h->disk) in nvme_mpath_wait_freeze()
124 blk_mq_freeze_queue_wait(h->disk->queue); in nvme_mpath_wait_freeze()
133 if (h->disk) in nvme_mpath_start_freeze()
134 blk_freeze_queue_start(h->disk->queue); in nvme_mpath_start_freeze()
158 bio_set_dev(bio, ns->head->disk->part0); in nvme_failover_req()
183 struct gendisk *disk = ns->head->disk; in nvme_mpath_start_request() local
191 if (!blk_queue_io_stat(disk->queue) || blk_rq_is_passthrough(rq) || in nvme_mpath_start_request()
196 nvme_req(rq)->start_time = bdev_start_io_acct(disk->part0, req_op(rq), in nvme_mpath_start_request()
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H A Dtrace.h38 static inline void __assign_disk_name(char *name, struct gendisk *disk) in __assign_disk_name() argument
40 if (disk) in __assign_disk_name()
41 memcpy(name, disk->disk_name, DISK_NAME_LEN); in __assign_disk_name()
51 __array(char, disk, DISK_NAME_LEN)
71 __assign_disk_name(__entry->disk, req->q->disk);
76 __entry->ctrl_id, __print_disk_name(__entry->disk),
89 __array(char, disk, DISK_NAME_LEN)
106 __assign_disk_name(__entry->disk, req->q->disk);
109 __entry->ctrl_id, __print_disk_name(__entry->disk),
146 __array(char, disk, DISK_NAME_LEN)
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/linux/Documentation/ABI/testing/
H A Dsysfs-fs-f2fs1 What: /sys/fs/f2fs/<disk>/gc_max_sleep_time
7 What: /sys/fs/f2fs/<disk>/gc_min_sleep_time
13 What: /sys/fs/f2fs/<disk>/gc_no_gc_sleep_time
19 What: /sys/fs/f2fs/<disk>/gc_idle
31 What: /sys/fs/f2fs/<disk>/reclaim_segments
41 What: /sys/fs/f2fs/<disk>/main_blkaddr
46 What: /sys/fs/f2fs/<disk>/ipu_policy
72 What: /sys/fs/f2fs/<disk>/min_ipu_util
78 What: /sys/fs/f2fs/<disk>/min_fsync_blocks
84 What: /sys/fs/f2fs/<disk>/min_seq_blocks
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/linux/drivers/scsi/
H A Dsr.c140 static inline struct scsi_cd *scsi_cd(struct gendisk *disk) in scsi_cd() argument
142 return disk->private_data; in scsi_cd()
302 struct scsi_cd *cd = scsi_cd(rq->q->disk); in sr_done()
342 if (error_sector < get_capacity(cd->disk) && in sr_done()
344 set_capacity(cd->disk, error_sector); in sr_done()
369 cd = scsi_cd(rq->q->disk); in sr_init_command()
495 static int sr_block_open(struct gendisk *disk, blk_mode_t mode) in sr_block_open() argument
497 struct scsi_cd *cd = scsi_cd(disk); in sr_block_open()
505 if (disk_check_media_change(disk)) { in sr_block_open()
521 static void sr_block_release(struct gendisk *disk) in sr_block_release() argument
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/linux/drivers/md/bcache/
H A Dwriteback.c32 struct cache_set *c = dc->disk.c; in __calc_target_rate()
84 int64_t dirty = bcache_dev_sectors_dirty(&dc->disk); in __update_writeback_rate()
101 struct cache_set *c = dc->disk.c; in __update_writeback_rate()
247 struct cache_set *c = dc->disk.c; in update_writeback_rate()
253 set_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
261 if (!test_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags) || in update_writeback_rate()
263 clear_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
297 if (test_bit(BCACHE_DEV_WB_RUNNING, &dc->disk.flags) && in update_writeback_rate()
307 clear_bit(BCACHE_DEV_RATE_DW_RUNNING, &dc->disk.flags); in update_writeback_rate()
315 if (test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) || in writeback_delay()
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/linux/Documentation/admin-guide/blockdev/
H A Dramdisk.rst2 Using the RAM disk block device with Linux
16 The RAM disk driver is a way to use main system memory as a block device. It
22 The RAM disk dynamically grows as more space is required. It does this by using
26 The RAM disk supports up to 16 RAM disks by default, and can be reconfigured
31 To use RAM disk support with your system, run './MAKEDEV ram' from the /dev
35 The new RAM disk also has the ability to load compressed RAM disk images,
37 rescue floppy disk.
48 This parameter tells the RAM disk driver to set up RAM disks of N k size. The
80 If you make a boot disk that has LILO, then for the above, you would use::
87 To create a RAM disk image, you will need a spare block device to
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/linux/drivers/block/drbd/
H A Ddrbd_state.c127 device_state_change->disk_state[OLD] = device->state.disk; in remember_old_state()
178 device_state_change->disk_state[NEW] = device->state.disk; in remember_new_state()
303 if (device->state.disk != D_DISKLESS || in conn_all_vols_unconf()
376 disk_state = max_t(enum drbd_disk_state, disk_state, device->state.disk); in conn_highest_disk()
392 disk_state = min_t(enum drbd_disk_state, disk_state, device->state.disk); in conn_lowest_disk()
474 (os.disk != D_FAILED && ns.disk == D_FAILED))) || in cl_wide_st_chg()
675 return drbd_req_state(device, NS(disk, D_FAILED), in request_detach()
689 device->state.disk != D_FAILED); in drbd_request_detach_interruptible()
722 drbd_disk_str(ns.disk), in print_st()
762 if (ns.disk != os.disk && flags & CS_DC_DISK) in print_state_change()
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/linux/Documentation/ABI/stable/
H A Dsysfs-block1 What: /sys/block/<disk>/alignment_offset
10 offset from the disk's natural alignment.
13 What: /sys/block/<disk>/discard_alignment
24 What: /sys/block/<disk>/atomic_write_max_bytes
42 What: /sys/block/<disk>/atomic_write_unit_min_bytes
53 What: /sys/block/<disk>/atomic_write_unit_max_bytes
64 What: /sys/block/<disk>/atomic_write_boundary_bytes
78 What: /sys/block/<disk>/diskseq
82 The /sys/block/<disk>/diskseq files reports the disk
90 What: /sys/block/<disk>/inflight
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