Ilya Dryomov 7e513d4366 rbd: enable extended devt in single-major mode ...

If single-major device number allocation scheme is turned on, instead
of reserving 256 minors per device, which imposes a limit of 4096
images mapped at once, reserve 16 minors per device and enable extended
devt feature.  This results in a theoretical limit of 65536 images
mapped at once, and still allows to have more than 15 partititions:
partitions starting with 16th are mapped under major 259 (Block
Extended Major):

$ rbd showmapped
id pool image snap device
0  rbd  b5    -    /dev/rbd0    # no partitions
1  rbd  b2    -    /dev/rbd1    # 40 partitions
2  rbd  b3    -    /dev/rbd2    #  2 partitions

$ cat /proc/partitions
 251        0       1024 rbd0
 251       16       1024 rbd1
 251       17          0 rbd1p1
 251       18          0 rbd1p2
 ...
 251       30          0 rbd1p14
 251       31          0 rbd1p15
 259        0          0 rbd1p16
 259        1          0 rbd1p17
 ...
 259       23          0 rbd1p39
 259       24          0 rbd1p40
 251       32       1024 rbd2
 251       33          0 rbd2p1
 251       34          0 rbd2p2

(major 251 was assigned dynamically at module load time)

Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

2013-12-31 20:32:04 +02:00

..

aoe

aoe: do not BUG if memory pressure prevented debugfs file creation

2013-09-11 15:59:28 -07:00

drbd

drbd: avoid to shrink max_bio_size due to peer re-configuration

2013-11-08 09:10:29 -07:00

mtip32xx

mtip32xx: dynamically allocate buffer in debugfs functions

2013-11-08 09:10:28 -07:00

paride

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

rsxx

rsxx: Fix possible kernel panic with invalid config.

2013-11-08 09:10:29 -07:00

xen-blkback

xen/blkback: fix reference counting

2013-11-08 09:10:27 -07:00

amiflop.c

tree-wide: use reinit_completion instead of INIT_COMPLETION

2013-11-15 09:32:21 +09:00

ataflop.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

brd.c

block: fix a probe argument to blk_register_region

2013-11-08 08:59:39 -07:00

cciss_cmd.h

cciss: use new doorbell-bit-5 reset method

2011-05-06 08:23:55 -06:00

cciss_scsi.c

cciss: switch to ->show_info()

2013-04-09 14:13:19 -04:00

cciss_scsi.h

cciss: add cciss_tape_cmds module paramter

2011-05-06 08:23:59 -06:00

cciss.c

tree-wide: use reinit_completion instead of INIT_COMPLETION

2013-11-15 09:32:21 +09:00

cciss.h

cciss: Adds simple mode functionality

2011-08-08 11:40:15 +02:00

cpqarray.c

cpqarray: fix info leak in ida_locked_ioctl()

2013-09-24 17:00:26 -07:00

cpqarray.h

…

cryptoloop.c

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

DAC960.c

procfs: new helper - PDE_DATA(inode)

2013-04-09 14:13:32 -04:00

DAC960.h

…

floppy.c

block: make rq->cmd_flags be 64-bit

2013-10-25 11:55:59 +01:00

hd.c

Remove all #inclusions of asm/system.h

2012-03-28 18:30:03 +01:00

ida_cmd.h

…

ida_ioctl.h

…

Kconfig

Merge branch 'for-3.13/post-mq-drivers' into for-linus

2013-11-14 08:29:01 -07:00

loop.c

loop: fix crash when using unassigned loop device

2013-11-08 09:10:28 -07:00

loop.h

move linux/loop.h to drivers/block

2013-06-29 12:46:45 +04:00

Makefile

Merge branch 'for-3.13/post-mq-drivers' into for-linus

2013-11-14 08:29:01 -07:00

mg_disk.c

mg_disk: remove deprecated IRQF_DISABLED

2013-11-08 09:10:27 -07:00

nbd.c

nbd: correct disconnect behavior

2013-07-03 16:08:05 -07:00

null_blk.c

kernel: remove CONFIG_USE_GENERIC_SMP_HELPERS cleanly

2013-11-21 16:42:27 -08:00

nvme-core.c

DMA-API: block: nvme-core: replace dma_set_mask()+dma_set_coherent_mask() with new helper

2013-09-21 21:02:24 +01:00

nvme-scsi.c

NVMe: Use kzalloc instead of kmalloc+memset

2013-06-19 13:24:27 -04:00

osdblk.c

block: replace strict_strtoul() with kstrtoul()

2013-09-11 15:56:56 -07:00

pktcdvd.c

pktcdvd: debugfs functions return NULL on error

2013-11-08 09:10:31 -07:00

ps3disk.c

Drivers: block: remove __dev* attributes.

2013-01-03 15:57:15 -08:00

ps3vram.c

procfs: new helper - PDE_DATA(inode)

2013-04-09 14:13:32 -04:00

rbd_types.h

rbd: get rid of RBD_MAX_SEG_NAME_LEN

2012-12-17 08:37:29 -06:00

rbd.c

rbd: enable extended devt in single-major mode

2013-12-31 20:32:04 +02:00

skd_main.c

skd: reorder construct/destruct code

2013-11-08 09:10:30 -07:00

skd_s1120.h

skd: fix formatting in skd_s1120.h

2013-11-08 09:10:30 -07:00

smart1,2.h

fix typos 'comamnd' -> 'command' in comments

2011-02-02 11:31:21 +01:00

sunvdc.c

sunvdc: Fix off-by-one in generic_request().

2013-02-14 11:49:01 -08:00

swim3.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00

swim_asm.S

m68k: mac - Add SWIM floppy support

2009-03-26 21:15:27 +01:00

swim.c

drivers/block/swim.c: remove unnecessary platform_set_drvdata()

2013-09-11 15:56:59 -07:00

sx8.c

block, sx8: fix pointer math issue getting fw version

2012-03-03 19:44:39 +01:00

umem.c

Drivers: block: remove __dev* attributes.

2013-01-03 15:57:15 -08:00

umem.h

drivers/block/umem: trim trailing whitespace

2007-10-10 09:25:59 +02:00

virtio_blk.c

virtio-blk: virtqueue_kick() must be ordered with other virtqueue operations

2013-11-19 19:00:45 -07:00

xen-blkfront.c

block: xen-blkfront: Fix possible NULL ptr dereference

2013-11-26 11:24:01 -05:00

xsysace.c

xilinx systemace: Fix sparse warnings

2013-07-10 07:47:12 +02:00

z2ram.c

block_device_operations->release() should return void

2013-05-07 02:16:21 -04:00