xref: /linux/block/Kconfig (revision 488f6682c832e9549d28b30075f00c76328eb1be)
1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0
23a65dfe8SJens Axboe#
33a65dfe8SJens Axboe# Block layer core configuration
43a65dfe8SJens Axboe#
516ed002fSJan Engelhardtmenuconfig BLOCK
66a108a14SDavid Rientjes       bool "Enable the block layer" if EXPERT
79361401eSDavid Howells       default y
888459642SOmar Sandoval       select SBITMAP
96a83e74dSBart Van Assche       select SRCU
109361401eSDavid Howells       help
11ee86418dSNick Andrew	 Provide block layer support for the kernel.
129361401eSDavid Howells
13ee86418dSNick Andrew	 Disable this option to remove the block layer support from the
14ee86418dSNick Andrew	 kernel. This may be useful for embedded devices.
15ee86418dSNick Andrew
16ee86418dSNick Andrew	 If this option is disabled:
17ee86418dSNick Andrew
18ee86418dSNick Andrew	   - block device files will become unusable
19ee86418dSNick Andrew	   - some filesystems (such as ext3) will become unavailable.
20ee86418dSNick Andrew
21ee86418dSNick Andrew	 Also, SCSI character devices and USB storage will be disabled since
22ee86418dSNick Andrew	 they make use of various block layer definitions and facilities.
239361401eSDavid Howells
249361401eSDavid Howells	 Say Y here unless you know you really don't want to mount disks and
259361401eSDavid Howells	 suchlike.
269361401eSDavid Howells
279361401eSDavid Howellsif BLOCK
289361401eSDavid Howells
296f816b4bSTejun Heoconfig BLK_RQ_ALLOC_TIME
306f816b4bSTejun Heo	bool
316f816b4bSTejun Heo
3272148aecSChristoph Hellwigconfig BLK_SCSI_REQUEST
3372148aecSChristoph Hellwig	bool
3472148aecSChristoph Hellwig
351d156646STejun Heoconfig BLK_CGROUP_RWSTAT
361d156646STejun Heo	bool
371d156646STejun Heo
383d6392cfSJens Axboeconfig BLK_DEV_BSG
3914d9fa35SJohn Stoffel	bool "Block layer SG support v4"
4014d9fa35SJohn Stoffel	default y
4172148aecSChristoph Hellwig	select BLK_SCSI_REQUEST
4214d9fa35SJohn Stoffel	help
43319a7b7fSFUJITA Tomonori	  Saying Y here will enable generic SG (SCSI generic) v4 support
44319a7b7fSFUJITA Tomonori	  for any block device.
45319a7b7fSFUJITA Tomonori
46319a7b7fSFUJITA Tomonori	  Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4
47319a7b7fSFUJITA Tomonori	  can handle complicated SCSI commands: tagged variable length cdbs
48319a7b7fSFUJITA Tomonori	  with bidirectional data transfers and generic request/response
49319a7b7fSFUJITA Tomonori	  protocols (e.g. Task Management Functions and SMP in Serial
50319a7b7fSFUJITA Tomonori	  Attached SCSI).
513d6392cfSJens Axboe
5214d9fa35SJohn Stoffel	  This option is required by recent UDEV versions to properly
5314d9fa35SJohn Stoffel	  access device serial numbers, etc.
5414d9fa35SJohn Stoffel
5514d9fa35SJohn Stoffel	  If unsure, say Y.
56ee86418dSNick Andrew
57aa387cc8SMike Christieconfig BLK_DEV_BSGLIB
58aa387cc8SMike Christie	bool "Block layer SG support v4 helper lib"
59aa387cc8SMike Christie	select BLK_DEV_BSG
6072148aecSChristoph Hellwig	select BLK_SCSI_REQUEST
61aa387cc8SMike Christie	help
62aa387cc8SMike Christie	  Subsystems will normally enable this if needed. Users will not
63aa387cc8SMike Christie	  normally need to manually enable this.
64aa387cc8SMike Christie
65aa387cc8SMike Christie	  If unsure, say N.
66aa387cc8SMike Christie
677ba1ba12SMartin K. Petersenconfig BLK_DEV_INTEGRITY
687ba1ba12SMartin K. Petersen	bool "Block layer data integrity support"
697ba1ba12SMartin K. Petersen	---help---
707ba1ba12SMartin K. Petersen	Some storage devices allow extra information to be
717ba1ba12SMartin K. Petersen	stored/retrieved to help protect the data.  The block layer
727ba1ba12SMartin K. Petersen	data integrity option provides hooks which can be used by
737ba1ba12SMartin K. Petersen	filesystems to ensure better data integrity.
747ba1ba12SMartin K. Petersen
757ba1ba12SMartin K. Petersen	Say yes here if you have a storage device that provides the
767ba1ba12SMartin K. Petersen	T10/SCSI Data Integrity Field or the T13/ATA External Path
777ba1ba12SMartin K. Petersen	Protection.  If in doubt, say N.
787ba1ba12SMartin K. Petersen
79a754bd5fSHerbert Xuconfig BLK_DEV_INTEGRITY_T10
80a754bd5fSHerbert Xu	tristate
81a754bd5fSHerbert Xu	depends on BLK_DEV_INTEGRITY
82a754bd5fSHerbert Xu	select CRC_T10DIF
83a754bd5fSHerbert Xu
846a0cb1bcSHannes Reineckeconfig BLK_DEV_ZONED
856a0cb1bcSHannes Reinecke	bool "Zoned block device support"
86b9aef63aSDamien Le Moal	select MQ_IOSCHED_DEADLINE
876a0cb1bcSHannes Reinecke	---help---
886a0cb1bcSHannes Reinecke	Block layer zoned block device support. This option enables
896a0cb1bcSHannes Reinecke	support for ZAC/ZBC host-managed and host-aware zoned block devices.
906a0cb1bcSHannes Reinecke
916a0cb1bcSHannes Reinecke	Say yes here if you have a ZAC or ZBC storage device.
926a0cb1bcSHannes Reinecke
93e43473b7SVivek Goyalconfig BLK_DEV_THROTTLING
94e43473b7SVivek Goyal	bool "Block layer bio throttling support"
958e42e0a2SKees Cook	depends on BLK_CGROUP=y
961d156646STejun Heo	select BLK_CGROUP_RWSTAT
97e43473b7SVivek Goyal	---help---
98e43473b7SVivek Goyal	Block layer bio throttling support. It can be used to limit
99e43473b7SVivek Goyal	the IO rate to a device. IO rate policies are per cgroup and
100e43473b7SVivek Goyal	one needs to mount and use blkio cgroup controller for creating
101e43473b7SVivek Goyal	cgroups and specifying per device IO rate policies.
102e43473b7SVivek Goyal
103da82c92fSMauro Carvalho Chehab	See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information.
104e43473b7SVivek Goyal
105327ffb9bSShaohua Liconfig BLK_DEV_THROTTLING_LOW
106327ffb9bSShaohua Li	bool "Block throttling .low limit interface support (EXPERIMENTAL)"
107327ffb9bSShaohua Li	depends on BLK_DEV_THROTTLING
108327ffb9bSShaohua Li	---help---
109327ffb9bSShaohua Li	Add .low limit interface for block throttling. The low limit is a best
110327ffb9bSShaohua Li	effort limit to prioritize cgroups. Depending on the setting, the limit
111327ffb9bSShaohua Li	can be used to protect cgroups in terms of bandwidth/iops and better
112327ffb9bSShaohua Li	utilize disk resource.
113327ffb9bSShaohua Li
114327ffb9bSShaohua Li	Note, this is an experimental interface and could be changed someday.
115327ffb9bSShaohua Li
116080506adSPaul Gortmakerconfig BLK_CMDLINE_PARSER
117bab55417SCai Zhiyong	bool "Block device command line partition parser"
118bab55417SCai Zhiyong	---help---
119080506adSPaul Gortmaker	Enabling this option allows you to specify the partition layout from
120080506adSPaul Gortmaker	the kernel boot args.  This is typically of use for embedded devices
121080506adSPaul Gortmaker	which don't otherwise have any standardized method for listing the
122080506adSPaul Gortmaker	partitions on a block device.
123080506adSPaul Gortmaker
124898bd37aSMauro Carvalho Chehab	See Documentation/block/cmdline-partition.rst for more information.
125bab55417SCai Zhiyong
12687760e5eSJens Axboeconfig BLK_WBT
12787760e5eSJens Axboe	bool "Enable support for block device writeback throttling"
12887760e5eSJens Axboe	---help---
12987760e5eSJens Axboe	Enabling this option enables the block layer to throttle buffered
13087760e5eSJens Axboe	background writeback from the VM, making it more smooth and having
13187760e5eSJens Axboe	less impact on foreground operations. The throttling is done
13287760e5eSJens Axboe	dynamically on an algorithm loosely based on CoDel, factoring in
13387760e5eSJens Axboe	the realtime performance of the disk.
13487760e5eSJens Axboe
135d7067512SJosef Bacikconfig BLK_CGROUP_IOLATENCY
136d7067512SJosef Bacik	bool "Enable support for latency based cgroup IO protection"
137d7067512SJosef Bacik	depends on BLK_CGROUP=y
138d7067512SJosef Bacik	---help---
139d7067512SJosef Bacik	Enabling this option enables the .latency interface for IO throttling.
140d7067512SJosef Bacik	The IO controller will attempt to maintain average IO latencies below
141d7067512SJosef Bacik	the configured latency target, throttling anybody with a higher latency
142d7067512SJosef Bacik	target than the victimized group.
143d7067512SJosef Bacik
144d7067512SJosef Bacik	Note, this is an experimental interface and could be changed someday.
145d7067512SJosef Bacik
1467caa4715STejun Heoconfig BLK_CGROUP_IOCOST
1477caa4715STejun Heo	bool "Enable support for cost model based cgroup IO controller"
1487caa4715STejun Heo	depends on BLK_CGROUP=y
149cd006509STejun Heo	select BLK_RQ_IO_DATA_LEN
1507caa4715STejun Heo	select BLK_RQ_ALLOC_TIME
1517caa4715STejun Heo	---help---
1527caa4715STejun Heo	Enabling this option enables the .weight interface for cost
1537caa4715STejun Heo	model based proportional IO control.  The IO controller
1547caa4715STejun Heo	distributes IO capacity between different groups based on
1557caa4715STejun Heo	their share of the overall weight distribution.
1567caa4715STejun Heo
15787760e5eSJens Axboeconfig BLK_WBT_MQ
15887760e5eSJens Axboe	bool "Multiqueue writeback throttling"
15987760e5eSJens Axboe	default y
16087760e5eSJens Axboe	depends on BLK_WBT
16187760e5eSJens Axboe	---help---
16287760e5eSJens Axboe	Enable writeback throttling by default on multiqueue devices.
16387760e5eSJens Axboe	Multiqueue currently doesn't have support for IO scheduling,
16487760e5eSJens Axboe	enabling this option is recommended.
16587760e5eSJens Axboe
166400f73b2SOmar Sandovalconfig BLK_DEBUG_FS
167400f73b2SOmar Sandoval	bool "Block layer debugging information in debugfs"
168400f73b2SOmar Sandoval	default y
169400f73b2SOmar Sandoval	depends on DEBUG_FS
170400f73b2SOmar Sandoval	---help---
171400f73b2SOmar Sandoval	Include block layer debugging information in debugfs. This information
172400f73b2SOmar Sandoval	is mostly useful for kernel developers, but it doesn't incur any cost
173400f73b2SOmar Sandoval	at runtime.
174400f73b2SOmar Sandoval
175400f73b2SOmar Sandoval	Unless you are building a kernel for a tiny system, you should
176400f73b2SOmar Sandoval	say Y here.
177400f73b2SOmar Sandoval
1786a5ac984SBart Van Asscheconfig BLK_DEBUG_FS_ZONED
1796a5ac984SBart Van Assche       bool
1806a5ac984SBart Van Assche       default BLK_DEBUG_FS && BLK_DEV_ZONED
1816a5ac984SBart Van Assche
182455a7b23SScott Bauerconfig BLK_SED_OPAL
183455a7b23SScott Bauer	bool "Logic for interfacing with Opal enabled SEDs"
184455a7b23SScott Bauer	---help---
185455a7b23SScott Bauer	Builds Logic for interfacing with Opal enabled controllers.
186455a7b23SScott Bauer	Enabling this option enables users to setup/unlock/lock
187455a7b23SScott Bauer	Locking ranges for SED devices using the Opal protocol.
188455a7b23SScott Bauer
1891b262839SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION
1901b262839SSatya Tangirala	bool "Enable inline encryption support in block layer"
1911b262839SSatya Tangirala	help
1921b262839SSatya Tangirala	  Build the blk-crypto subsystem. Enabling this lets the
1931b262839SSatya Tangirala	  block layer handle encryption, so users can take
1941b262839SSatya Tangirala	  advantage of inline encryption hardware if present.
1951b262839SSatya Tangirala
196*488f6682SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION_FALLBACK
197*488f6682SSatya Tangirala	bool "Enable crypto API fallback for blk-crypto"
198*488f6682SSatya Tangirala	depends on BLK_INLINE_ENCRYPTION
199*488f6682SSatya Tangirala	select CRYPTO
200*488f6682SSatya Tangirala	select CRYPTO_SKCIPHER
201*488f6682SSatya Tangirala	help
202*488f6682SSatya Tangirala	  Enabling this lets the block layer handle inline encryption
203*488f6682SSatya Tangirala	  by falling back to the kernel crypto API when inline
204*488f6682SSatya Tangirala	  encryption hardware is not present.
205*488f6682SSatya Tangirala
2069be96f3fSAl Viromenu "Partition Types"
2079be96f3fSAl Viro
2089be96f3fSAl Virosource "block/partitions/Kconfig"
2099be96f3fSAl Viro
2109be96f3fSAl Viroendmenu
2119be96f3fSAl Viro
2122b9e0aaeSLinus Torvaldsendif # BLOCK
2132b9e0aaeSLinus Torvalds
21499874d50SJens Axboeconfig BLOCK_COMPAT
21599874d50SJens Axboe	bool
2162b9e0aaeSLinus Torvalds	depends on BLOCK && COMPAT
21799874d50SJens Axboe	default y
21899874d50SJens Axboe
2198ec2ef2bSStephen Rothwellconfig BLK_MQ_PCI
2208ec2ef2bSStephen Rothwell	bool
2218ec2ef2bSStephen Rothwell	depends on BLOCK && PCI
2228ec2ef2bSStephen Rothwell	default y
2238ec2ef2bSStephen Rothwell
22473473427SChristoph Hellwigconfig BLK_MQ_VIRTIO
22573473427SChristoph Hellwig	bool
22673473427SChristoph Hellwig	depends on BLOCK && VIRTIO
22773473427SChristoph Hellwig	default y
22873473427SChristoph Hellwig
22924c5dc66SSagi Grimbergconfig BLK_MQ_RDMA
23024c5dc66SSagi Grimberg	bool
23124c5dc66SSagi Grimberg	depends on BLOCK && INFINIBAND
23224c5dc66SSagi Grimberg	default y
23324c5dc66SSagi Grimberg
234bca6b067SBart Van Asscheconfig BLK_PM
235bca6b067SBart Van Assche	def_bool BLOCK && PM
236bca6b067SBart Van Assche
2378636a1f9SMasahiro Yamadasource "block/Kconfig.iosched"
238