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 321d156646STejun Heoconfig BLK_CGROUP_RWSTAT 331d156646STejun Heo bool 341d156646STejun Heo 3578011042SChristoph Hellwigconfig BLK_DEV_BSG_COMMON 3678011042SChristoph Hellwig tristate 37ee86418dSNick Andrew 38aa387cc8SMike Christieconfig BLK_DEV_BSGLIB 39aa387cc8SMike Christie bool "Block layer SG support v4 helper lib" 4078011042SChristoph Hellwig select BLK_DEV_BSG_COMMON 41aa387cc8SMike Christie help 42aa387cc8SMike Christie Subsystems will normally enable this if needed. Users will not 43aa387cc8SMike Christie normally need to manually enable this. 44aa387cc8SMike Christie 45aa387cc8SMike Christie If unsure, say N. 46aa387cc8SMike Christie 477ba1ba12SMartin K. Petersenconfig BLK_DEV_INTEGRITY 487ba1ba12SMartin K. Petersen bool "Block layer data integrity support" 49a7f7f624SMasahiro Yamada help 507ba1ba12SMartin K. Petersen Some storage devices allow extra information to be 517ba1ba12SMartin K. Petersen stored/retrieved to help protect the data. The block layer 527ba1ba12SMartin K. Petersen data integrity option provides hooks which can be used by 537ba1ba12SMartin K. Petersen filesystems to ensure better data integrity. 547ba1ba12SMartin K. Petersen 557ba1ba12SMartin K. Petersen Say yes here if you have a storage device that provides the 567ba1ba12SMartin K. Petersen T10/SCSI Data Integrity Field or the T13/ATA External Path 577ba1ba12SMartin K. Petersen Protection. If in doubt, say N. 587ba1ba12SMartin K. Petersen 59a754bd5fSHerbert Xuconfig BLK_DEV_INTEGRITY_T10 60a754bd5fSHerbert Xu tristate 61a754bd5fSHerbert Xu depends on BLK_DEV_INTEGRITY 62a754bd5fSHerbert Xu select CRC_T10DIF 63a754bd5fSHerbert Xu 646a0cb1bcSHannes Reineckeconfig BLK_DEV_ZONED 656a0cb1bcSHannes Reinecke bool "Zoned block device support" 66b9aef63aSDamien Le Moal select MQ_IOSCHED_DEADLINE 67a7f7f624SMasahiro Yamada help 686a0cb1bcSHannes Reinecke Block layer zoned block device support. This option enables 69240e6ee2SKeith Busch support for ZAC/ZBC/ZNS host-managed and host-aware zoned block 70240e6ee2SKeith Busch devices. 716a0cb1bcSHannes Reinecke 72240e6ee2SKeith Busch Say yes here if you have a ZAC, ZBC, or ZNS storage device. 736a0cb1bcSHannes Reinecke 74e43473b7SVivek Goyalconfig BLK_DEV_THROTTLING 75e43473b7SVivek Goyal bool "Block layer bio throttling support" 76*df252bdeSMasahiro Yamada depends on BLK_CGROUP 771d156646STejun Heo select BLK_CGROUP_RWSTAT 78a7f7f624SMasahiro Yamada help 79e43473b7SVivek Goyal Block layer bio throttling support. It can be used to limit 80e43473b7SVivek Goyal the IO rate to a device. IO rate policies are per cgroup and 81e43473b7SVivek Goyal one needs to mount and use blkio cgroup controller for creating 82e43473b7SVivek Goyal cgroups and specifying per device IO rate policies. 83e43473b7SVivek Goyal 84da82c92fSMauro Carvalho Chehab See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. 85e43473b7SVivek Goyal 86327ffb9bSShaohua Liconfig BLK_DEV_THROTTLING_LOW 87327ffb9bSShaohua Li bool "Block throttling .low limit interface support (EXPERIMENTAL)" 88327ffb9bSShaohua Li depends on BLK_DEV_THROTTLING 89a7f7f624SMasahiro Yamada help 90327ffb9bSShaohua Li Add .low limit interface for block throttling. The low limit is a best 91327ffb9bSShaohua Li effort limit to prioritize cgroups. Depending on the setting, the limit 92327ffb9bSShaohua Li can be used to protect cgroups in terms of bandwidth/iops and better 93327ffb9bSShaohua Li utilize disk resource. 94327ffb9bSShaohua Li 95327ffb9bSShaohua Li Note, this is an experimental interface and could be changed someday. 96327ffb9bSShaohua Li 9787760e5eSJens Axboeconfig BLK_WBT 9887760e5eSJens Axboe bool "Enable support for block device writeback throttling" 99a7f7f624SMasahiro Yamada help 10087760e5eSJens Axboe Enabling this option enables the block layer to throttle buffered 10187760e5eSJens Axboe background writeback from the VM, making it more smooth and having 10287760e5eSJens Axboe less impact on foreground operations. The throttling is done 10387760e5eSJens Axboe dynamically on an algorithm loosely based on CoDel, factoring in 10487760e5eSJens Axboe the realtime performance of the disk. 10587760e5eSJens Axboe 1065f6776baSBart Van Asscheconfig BLK_WBT_MQ 1075f6776baSBart Van Assche bool "Enable writeback throttling by default" 1085f6776baSBart Van Assche default y 1095f6776baSBart Van Assche depends on BLK_WBT 1105f6776baSBart Van Assche help 1115f6776baSBart Van Assche Enable writeback throttling by default for request-based block devices. 1125f6776baSBart Van Assche 113d7067512SJosef Bacikconfig BLK_CGROUP_IOLATENCY 114d7067512SJosef Bacik bool "Enable support for latency based cgroup IO protection" 115*df252bdeSMasahiro Yamada depends on BLK_CGROUP 116a7f7f624SMasahiro Yamada help 117d7067512SJosef Bacik Enabling this option enables the .latency interface for IO throttling. 118d7067512SJosef Bacik The IO controller will attempt to maintain average IO latencies below 119d7067512SJosef Bacik the configured latency target, throttling anybody with a higher latency 120d7067512SJosef Bacik target than the victimized group. 121d7067512SJosef Bacik 122d7067512SJosef Bacik Note, this is an experimental interface and could be changed someday. 123d7067512SJosef Bacik 124d2bcbeabSMuneendra Kumarconfig BLK_CGROUP_FC_APPID 125d2bcbeabSMuneendra Kumar bool "Enable support to track FC I/O Traffic across cgroup applications" 126d2500a0cSMartin K. Petersen depends on BLK_CGROUP && NVME_FC 127d2bcbeabSMuneendra Kumar help 128d2bcbeabSMuneendra Kumar Enabling this option enables the support to track FC I/O traffic across 129d2bcbeabSMuneendra Kumar cgroup applications. It enables the Fabric and the storage targets to 130d2bcbeabSMuneendra Kumar identify, monitor, and handle FC traffic based on VM tags by inserting 131d2bcbeabSMuneendra Kumar application specific identification into the FC frame. 132d2bcbeabSMuneendra Kumar 1337caa4715STejun Heoconfig BLK_CGROUP_IOCOST 1347caa4715STejun Heo bool "Enable support for cost model based cgroup IO controller" 135*df252bdeSMasahiro Yamada depends on BLK_CGROUP 136cd006509STejun Heo select BLK_RQ_IO_DATA_LEN 1377caa4715STejun Heo select BLK_RQ_ALLOC_TIME 138a7f7f624SMasahiro Yamada help 1397caa4715STejun Heo Enabling this option enables the .weight interface for cost 1407caa4715STejun Heo model based proportional IO control. The IO controller 1417caa4715STejun Heo distributes IO capacity between different groups based on 1427caa4715STejun Heo their share of the overall weight distribution. 1437caa4715STejun Heo 144556910e3SBart Van Asscheconfig BLK_CGROUP_IOPRIO 145556910e3SBart Van Assche bool "Cgroup I/O controller for assigning an I/O priority class" 146556910e3SBart Van Assche depends on BLK_CGROUP 147556910e3SBart Van Assche help 148556910e3SBart Van Assche Enable the .prio interface for assigning an I/O priority class to 149556910e3SBart Van Assche requests. The I/O priority class affects the order in which an I/O 150556910e3SBart Van Assche scheduler and block devices process requests. Only some I/O schedulers 151556910e3SBart Van Assche and some block devices support I/O priorities. 152556910e3SBart Van Assche 153400f73b2SOmar Sandovalconfig BLK_DEBUG_FS 154400f73b2SOmar Sandoval bool "Block layer debugging information in debugfs" 155400f73b2SOmar Sandoval default y 156400f73b2SOmar Sandoval depends on DEBUG_FS 157a7f7f624SMasahiro Yamada help 158400f73b2SOmar Sandoval Include block layer debugging information in debugfs. This information 159400f73b2SOmar Sandoval is mostly useful for kernel developers, but it doesn't incur any cost 160400f73b2SOmar Sandoval at runtime. 161400f73b2SOmar Sandoval 162400f73b2SOmar Sandoval Unless you are building a kernel for a tiny system, you should 163400f73b2SOmar Sandoval say Y here. 164400f73b2SOmar Sandoval 1656a5ac984SBart Van Asscheconfig BLK_DEBUG_FS_ZONED 1666a5ac984SBart Van Assche bool 1676a5ac984SBart Van Assche default BLK_DEBUG_FS && BLK_DEV_ZONED 1686a5ac984SBart Van Assche 169455a7b23SScott Bauerconfig BLK_SED_OPAL 170455a7b23SScott Bauer bool "Logic for interfacing with Opal enabled SEDs" 171a7f7f624SMasahiro Yamada help 172455a7b23SScott Bauer Builds Logic for interfacing with Opal enabled controllers. 173455a7b23SScott Bauer Enabling this option enables users to setup/unlock/lock 174455a7b23SScott Bauer Locking ranges for SED devices using the Opal protocol. 175455a7b23SScott Bauer 1761b262839SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION 1771b262839SSatya Tangirala bool "Enable inline encryption support in block layer" 1781b262839SSatya Tangirala help 1791b262839SSatya Tangirala Build the blk-crypto subsystem. Enabling this lets the 1801b262839SSatya Tangirala block layer handle encryption, so users can take 1811b262839SSatya Tangirala advantage of inline encryption hardware if present. 1821b262839SSatya Tangirala 183488f6682SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION_FALLBACK 184488f6682SSatya Tangirala bool "Enable crypto API fallback for blk-crypto" 185488f6682SSatya Tangirala depends on BLK_INLINE_ENCRYPTION 186488f6682SSatya Tangirala select CRYPTO 187488f6682SSatya Tangirala select CRYPTO_SKCIPHER 188488f6682SSatya Tangirala help 189488f6682SSatya Tangirala Enabling this lets the block layer handle inline encryption 190488f6682SSatya Tangirala by falling back to the kernel crypto API when inline 191488f6682SSatya Tangirala encryption hardware is not present. 192488f6682SSatya Tangirala 1939be96f3fSAl Viromenu "Partition Types" 1949be96f3fSAl Viro 1959be96f3fSAl Virosource "block/partitions/Kconfig" 1969be96f3fSAl Viro 1979be96f3fSAl Viroendmenu 1989be96f3fSAl Viro 1992b9e0aaeSLinus Torvaldsendif # BLOCK 2002b9e0aaeSLinus Torvalds 20199874d50SJens Axboeconfig BLOCK_COMPAT 20299874d50SJens Axboe bool 2032b9e0aaeSLinus Torvalds depends on BLOCK && COMPAT 20499874d50SJens Axboe default y 20599874d50SJens Axboe 2068ec2ef2bSStephen Rothwellconfig BLK_MQ_PCI 2078ec2ef2bSStephen Rothwell bool 2088ec2ef2bSStephen Rothwell depends on BLOCK && PCI 2098ec2ef2bSStephen Rothwell default y 2108ec2ef2bSStephen Rothwell 21173473427SChristoph Hellwigconfig BLK_MQ_VIRTIO 21273473427SChristoph Hellwig bool 21373473427SChristoph Hellwig depends on BLOCK && VIRTIO 21473473427SChristoph Hellwig default y 21573473427SChristoph Hellwig 21624c5dc66SSagi Grimbergconfig BLK_MQ_RDMA 21724c5dc66SSagi Grimberg bool 21824c5dc66SSagi Grimberg depends on BLOCK && INFINIBAND 21924c5dc66SSagi Grimberg default y 22024c5dc66SSagi Grimberg 221bca6b067SBart Van Asscheconfig BLK_PM 222bca6b067SBart Van Assche def_bool BLOCK && PM 223bca6b067SBart Van Assche 224c66fd019SChristoph Hellwig# do not use in new code 225c66fd019SChristoph Hellwigconfig BLOCK_HOLDER_DEPRECATED 226c66fd019SChristoph Hellwig bool 227c66fd019SChristoph Hellwig 2288636a1f9SMasahiro Yamadasource "block/Kconfig.iosched" 229