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/linux/block/
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-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 Dbdev.c473 struct block_device *bdev_alloc(struct gendisk *disk, u8 partno) in bdev_alloc() argument
492 bdev->bd_queue = disk->queue; in bdev_alloc()
493 if (partno && bdev_test_flag(disk->part0, BD_HAS_SUBMIT_BIO)) in bdev_alloc()
500 bdev->bd_disk = disk; in bdev_alloc()
743 struct gendisk *disk = bdev->bd_disk; in blkdev_get_whole() local
746 if (disk->fops->open) { in blkdev_get_whole()
747 ret = disk->fops->open(disk, mode); in blkdev_get_whole()
751 test_bit(GD_NEED_PART_SCAN, &disk->state)) in blkdev_get_whole()
752 bdev_disk_changed(disk, true); in blkdev_get_whole()
760 if (test_bit(GD_NEED_PART_SCAN, &disk->state)) { in blkdev_get_whole()
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H A Dblk-cgroup.c298 static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct gendisk *disk, in blkg_alloc() argument
305 blkg = kzalloc_node(sizeof(*blkg), gfp_mask, disk->queue->node); in blkg_alloc()
313 if (!blk_get_queue(disk->queue)) in blkg_alloc()
316 blkg->q = disk->queue; in blkg_alloc()
336 if (!blkcg_policy_enabled(disk->queue, pol)) in blkg_alloc()
340 pd = pol->pd_alloc_fn(disk, blkcg, gfp_mask); in blkg_alloc()
355 blk_put_queue(disk->queue); in blkg_alloc()
369 static struct blkcg_gq *blkg_create(struct blkcg *blkcg, struct gendisk *disk, in blkg_create() argument
375 lockdep_assert_held(&disk->queue->queue_lock); in blkg_create()
378 if (blk_queue_dying(disk->queue)) { in blkg_create()
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/linux/block/partitions/
H A Dcore.c132 state->disk = hd; in check_partition()
293 static struct block_device *add_partition(struct gendisk *disk, int partno, in add_partition() argument
298 struct device *ddev = disk_to_dev(disk); in add_partition()
304 lockdep_assert_held(&disk->open_mutex); in add_partition()
313 if (bdev_is_zoned(disk->part0)) { in add_partition()
315 disk->disk_name); in add_partition()
319 if (xa_load(&disk->part_tbl, partno)) in add_partition()
323 get_device(disk_to_dev(disk)); in add_partition()
326 bdev = bdev_alloc(disk, partno); in add_partition()
346 if (bdev_partno(bdev) < disk->minors) { in add_partition()
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H A Damiga.c56 state->disk->disk_name, blk); in amiga_partition()
78 state->disk->disk_name, blk); in amiga_partition()
97 state->disk->disk_name, blk, part); in amiga_partition()
103 state->disk->disk_name, blk); in amiga_partition()
127 state->disk->disk_name, cylblk); in amiga_partition()
134 state->disk->disk_name, cylblk, in amiga_partition()
144 state->disk->disk_name, part); in amiga_partition()
165 state->disk->disk_name, part, in amiga_partition()
171 state->disk->disk_name, part, in amiga_partition()
/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()
75 .disk = md->disk, in dm_blk_report_zones()
125 return disk_report_zone(args->disk, zone, args->zone_idx++, in dm_report_zones_cb()
172 struct gendisk *disk = md->disk; in dm_revalidate_zones() local
173 unsigned int nr_zones = disk->nr_zones; in dm_revalidate_zones()
176 if (!get_capacity(disk)) in dm_revalidate_zones()
186 DMINFO("%s using %s zone append", disk->disk_name, in dm_revalidate_zones()
196 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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H A Dldm.rst13 1MiB journalled database at the end of the physical disk. The size of
14 partitions is limited only by disk space. The maximum number of partitions is
25 Once the LDM driver has divided up the disk, you can use the MD driver to
28 To prevent legacy applications from repartitioning the disk, the LDM creates a
29 dummy MSDOS partition containing one disk-sized partition. This is what is
33 GPT label disk. This is not supported by the Linux LDM driver yet.
39 Below we have a 50MiB disk, divided into seven partitions.
43 The missing 1MiB at the end of the disk is where the LDM database is
67 disk, but the driver will sort them.
95 is a dummy MSDOS partition filling the whole disk. You won't be able to mount
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/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 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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H A Dnbd.c124 struct gendisk *disk; member
163 #define nbd_name(nbd) ((nbd)->disk->disk_name)
181 return disk_to_dev(nbd->disk); in nbd_to_dev()
239 struct gendisk *disk = dev_to_disk(dev); in pid_show() local
240 struct nbd_device *nbd = disk->private_data; in pid_show()
253 struct gendisk *disk = dev_to_disk(dev); in backend_show() local
254 struct nbd_device *nbd = disk->private_data; in backend_show()
266 struct gendisk *disk = nbd->disk; in nbd_dev_remove() local
268 del_gendisk(disk); in nbd_dev_remove()
279 put_disk(disk); in nbd_dev_remove()
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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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H A Dsysfs-fs-ext41 What: /sys/fs/ext4/<disk>/mb_stats
10 What: /sys/fs/ext4/<disk>/mb_group_prealloc
18 What: /sys/fs/ext4/<disk>/mb_max_to_scan
25 What: /sys/fs/ext4/<disk>/mb_min_to_scan
32 What: /sys/fs/ext4/<disk>/mb_order2_req
40 What: /sys/fs/ext4/<disk>/mb_stream_req
51 What: /sys/fs/ext4/<disk>/inode_readahead_blks
59 What: /sys/fs/ext4/<disk>/delayed_allocation_blocks
67 What: /sys/fs/ext4/<disk>/lifetime_write_kbytes
75 What: /sys/fs/ext4/<disk>/session_write_kbytes
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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/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/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/driver-api/md/
H A Draid5-cache.rst5 Raid 4/5/6 could include an extra disk for data cache besides normal RAID
6 disks. The role of RAID disks isn't changed with the cache disk. The cache disk
19 In both modes, all writes to the array will hit cache disk first. This means
20 the cache disk must be fast and sustainable.
34 The write-through cache will cache all data on cache disk first. After the data
35 is safe on the cache disk, the data will be flushed onto RAID disks. The
40 filesystems) after the data is safe on RAID disks, so cache disk failure
41 doesn't cause data loss. Of course cache disk failure means the array is
44 In write-through mode, the cache disk isn't required to be big. Several
51 cached on cache disk. But the main goal of 'write-back' cache is to speed up
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/linux/drivers/cdrom/
H A Dgdrom.c96 struct gendisk *disk; member
477 static int gdrom_bdops_open(struct gendisk *disk, blk_mode_t mode) in gdrom_bdops_open() argument
481 disk_check_media_change(disk); in gdrom_bdops_open()
489 static void gdrom_bdops_release(struct gendisk *disk) in gdrom_bdops_release() argument
496 static unsigned int gdrom_bdops_check_events(struct gendisk *disk, in gdrom_bdops_check_events() argument
718 gd.disk->major = gdrom_major; in probe_gdrom_setupdisk()
719 gd.disk->first_minor = 1; in probe_gdrom_setupdisk()
720 gd.disk->minors = 1; in probe_gdrom_setupdisk()
721 gd.disk->flags |= GENHD_FL_NO_PART; in probe_gdrom_setupdisk()
722 strcpy(gd.disk->disk_name, GDROM_DEV_NAME); in probe_gdrom_setupdisk()
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/linux/drivers/md/bcache/
H A Dwriteback.h82 int stripe = offset_to_stripe(&dc->disk, offset); in bcache_dev_stripe_dirty()
88 if (atomic_read(dc->disk.stripe_sectors_dirty + stripe)) in bcache_dev_stripe_dirty()
91 if (nr_sectors <= dc->disk.stripe_size) in bcache_dev_stripe_dirty()
94 nr_sectors -= dc->disk.stripe_size; in bcache_dev_stripe_dirty()
105 unsigned int in_use = dc->disk.c->gc_stats.in_use; in should_writeback()
108 test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) || in should_writeback()

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