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 38*5ef16305SChristoph Hellwigconfig BLK_ICQ 39*5ef16305SChristoph Hellwig bool 40*5ef16305SChristoph Hellwig 41aa387cc8SMike Christieconfig BLK_DEV_BSGLIB 42aa387cc8SMike Christie bool "Block layer SG support v4 helper lib" 4378011042SChristoph Hellwig select BLK_DEV_BSG_COMMON 44aa387cc8SMike Christie help 45aa387cc8SMike Christie Subsystems will normally enable this if needed. Users will not 46aa387cc8SMike Christie normally need to manually enable this. 47aa387cc8SMike Christie 48aa387cc8SMike Christie If unsure, say N. 49aa387cc8SMike Christie 507ba1ba12SMartin K. Petersenconfig BLK_DEV_INTEGRITY 517ba1ba12SMartin K. Petersen bool "Block layer data integrity support" 52a7f7f624SMasahiro Yamada help 537ba1ba12SMartin K. Petersen Some storage devices allow extra information to be 547ba1ba12SMartin K. Petersen stored/retrieved to help protect the data. The block layer 557ba1ba12SMartin K. Petersen data integrity option provides hooks which can be used by 567ba1ba12SMartin K. Petersen filesystems to ensure better data integrity. 577ba1ba12SMartin K. Petersen 587ba1ba12SMartin K. Petersen Say yes here if you have a storage device that provides the 597ba1ba12SMartin K. Petersen T10/SCSI Data Integrity Field or the T13/ATA External Path 607ba1ba12SMartin K. Petersen Protection. If in doubt, say N. 617ba1ba12SMartin K. Petersen 62a754bd5fSHerbert Xuconfig BLK_DEV_INTEGRITY_T10 63a754bd5fSHerbert Xu tristate 64a754bd5fSHerbert Xu depends on BLK_DEV_INTEGRITY 65a754bd5fSHerbert Xu select CRC_T10DIF 66a754bd5fSHerbert Xu 676a0cb1bcSHannes Reineckeconfig BLK_DEV_ZONED 686a0cb1bcSHannes Reinecke bool "Zoned block device support" 69b9aef63aSDamien Le Moal select MQ_IOSCHED_DEADLINE 70a7f7f624SMasahiro Yamada help 716a0cb1bcSHannes Reinecke Block layer zoned block device support. This option enables 72240e6ee2SKeith Busch support for ZAC/ZBC/ZNS host-managed and host-aware zoned block 73240e6ee2SKeith Busch devices. 746a0cb1bcSHannes Reinecke 75240e6ee2SKeith Busch Say yes here if you have a ZAC, ZBC, or ZNS storage device. 766a0cb1bcSHannes Reinecke 77e43473b7SVivek Goyalconfig BLK_DEV_THROTTLING 78e43473b7SVivek Goyal bool "Block layer bio throttling support" 79df252bdeSMasahiro Yamada depends on BLK_CGROUP 801d156646STejun Heo select BLK_CGROUP_RWSTAT 81a7f7f624SMasahiro Yamada help 82e43473b7SVivek Goyal Block layer bio throttling support. It can be used to limit 83e43473b7SVivek Goyal the IO rate to a device. IO rate policies are per cgroup and 84e43473b7SVivek Goyal one needs to mount and use blkio cgroup controller for creating 85e43473b7SVivek Goyal cgroups and specifying per device IO rate policies. 86e43473b7SVivek Goyal 87da82c92fSMauro Carvalho Chehab See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. 88e43473b7SVivek Goyal 89327ffb9bSShaohua Liconfig BLK_DEV_THROTTLING_LOW 90327ffb9bSShaohua Li bool "Block throttling .low limit interface support (EXPERIMENTAL)" 91327ffb9bSShaohua Li depends on BLK_DEV_THROTTLING 92a7f7f624SMasahiro Yamada help 93327ffb9bSShaohua Li Add .low limit interface for block throttling. The low limit is a best 94327ffb9bSShaohua Li effort limit to prioritize cgroups. Depending on the setting, the limit 95327ffb9bSShaohua Li can be used to protect cgroups in terms of bandwidth/iops and better 96327ffb9bSShaohua Li utilize disk resource. 97327ffb9bSShaohua Li 98327ffb9bSShaohua Li Note, this is an experimental interface and could be changed someday. 99327ffb9bSShaohua Li 10087760e5eSJens Axboeconfig BLK_WBT 10187760e5eSJens Axboe bool "Enable support for block device writeback throttling" 102a7f7f624SMasahiro Yamada help 10387760e5eSJens Axboe Enabling this option enables the block layer to throttle buffered 10487760e5eSJens Axboe background writeback from the VM, making it more smooth and having 10587760e5eSJens Axboe less impact on foreground operations. The throttling is done 10687760e5eSJens Axboe dynamically on an algorithm loosely based on CoDel, factoring in 10787760e5eSJens Axboe the realtime performance of the disk. 10887760e5eSJens Axboe 1095f6776baSBart Van Asscheconfig BLK_WBT_MQ 1105f6776baSBart Van Assche bool "Enable writeback throttling by default" 1115f6776baSBart Van Assche default y 1125f6776baSBart Van Assche depends on BLK_WBT 1135f6776baSBart Van Assche help 1145f6776baSBart Van Assche Enable writeback throttling by default for request-based block devices. 1155f6776baSBart Van Assche 116d7067512SJosef Bacikconfig BLK_CGROUP_IOLATENCY 117d7067512SJosef Bacik bool "Enable support for latency based cgroup IO protection" 118df252bdeSMasahiro Yamada depends on BLK_CGROUP 119a7f7f624SMasahiro Yamada help 120d7067512SJosef Bacik Enabling this option enables the .latency interface for IO throttling. 121d7067512SJosef Bacik The IO controller will attempt to maintain average IO latencies below 122d7067512SJosef Bacik the configured latency target, throttling anybody with a higher latency 123d7067512SJosef Bacik target than the victimized group. 124d7067512SJosef Bacik 125d7067512SJosef Bacik Note, this is an experimental interface and could be changed someday. 126d7067512SJosef Bacik 127d2bcbeabSMuneendra Kumarconfig BLK_CGROUP_FC_APPID 128d2bcbeabSMuneendra Kumar bool "Enable support to track FC I/O Traffic across cgroup applications" 129d2500a0cSMartin K. Petersen depends on BLK_CGROUP && NVME_FC 130d2bcbeabSMuneendra Kumar help 131d2bcbeabSMuneendra Kumar Enabling this option enables the support to track FC I/O traffic across 132d2bcbeabSMuneendra Kumar cgroup applications. It enables the Fabric and the storage targets to 133d2bcbeabSMuneendra Kumar identify, monitor, and handle FC traffic based on VM tags by inserting 134d2bcbeabSMuneendra Kumar application specific identification into the FC frame. 135d2bcbeabSMuneendra Kumar 1367caa4715STejun Heoconfig BLK_CGROUP_IOCOST 1377caa4715STejun Heo bool "Enable support for cost model based cgroup IO controller" 138df252bdeSMasahiro Yamada depends on BLK_CGROUP 139cd006509STejun Heo select BLK_RQ_IO_DATA_LEN 1407caa4715STejun Heo select BLK_RQ_ALLOC_TIME 141a7f7f624SMasahiro Yamada help 1427caa4715STejun Heo Enabling this option enables the .weight interface for cost 1437caa4715STejun Heo model based proportional IO control. The IO controller 1447caa4715STejun Heo distributes IO capacity between different groups based on 1457caa4715STejun Heo their share of the overall weight distribution. 1467caa4715STejun Heo 147556910e3SBart Van Asscheconfig BLK_CGROUP_IOPRIO 148556910e3SBart Van Assche bool "Cgroup I/O controller for assigning an I/O priority class" 149556910e3SBart Van Assche depends on BLK_CGROUP 150556910e3SBart Van Assche help 151556910e3SBart Van Assche Enable the .prio interface for assigning an I/O priority class to 152556910e3SBart Van Assche requests. The I/O priority class affects the order in which an I/O 153556910e3SBart Van Assche scheduler and block devices process requests. Only some I/O schedulers 154556910e3SBart Van Assche and some block devices support I/O priorities. 155556910e3SBart Van Assche 156400f73b2SOmar Sandovalconfig BLK_DEBUG_FS 157400f73b2SOmar Sandoval bool "Block layer debugging information in debugfs" 158400f73b2SOmar Sandoval default y 159400f73b2SOmar Sandoval depends on DEBUG_FS 160a7f7f624SMasahiro Yamada help 161400f73b2SOmar Sandoval Include block layer debugging information in debugfs. This information 162400f73b2SOmar Sandoval is mostly useful for kernel developers, but it doesn't incur any cost 163400f73b2SOmar Sandoval at runtime. 164400f73b2SOmar Sandoval 165400f73b2SOmar Sandoval Unless you are building a kernel for a tiny system, you should 166400f73b2SOmar Sandoval say Y here. 167400f73b2SOmar Sandoval 1686a5ac984SBart Van Asscheconfig BLK_DEBUG_FS_ZONED 1696a5ac984SBart Van Assche bool 1706a5ac984SBart Van Assche default BLK_DEBUG_FS && BLK_DEV_ZONED 1716a5ac984SBart Van Assche 172455a7b23SScott Bauerconfig BLK_SED_OPAL 173455a7b23SScott Bauer bool "Logic for interfacing with Opal enabled SEDs" 174a7f7f624SMasahiro Yamada help 175455a7b23SScott Bauer Builds Logic for interfacing with Opal enabled controllers. 176455a7b23SScott Bauer Enabling this option enables users to setup/unlock/lock 177455a7b23SScott Bauer Locking ranges for SED devices using the Opal protocol. 178455a7b23SScott Bauer 1791b262839SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION 1801b262839SSatya Tangirala bool "Enable inline encryption support in block layer" 1811b262839SSatya Tangirala help 1821b262839SSatya Tangirala Build the blk-crypto subsystem. Enabling this lets the 1831b262839SSatya Tangirala block layer handle encryption, so users can take 1841b262839SSatya Tangirala advantage of inline encryption hardware if present. 1851b262839SSatya Tangirala 186488f6682SSatya Tangiralaconfig BLK_INLINE_ENCRYPTION_FALLBACK 187488f6682SSatya Tangirala bool "Enable crypto API fallback for blk-crypto" 188488f6682SSatya Tangirala depends on BLK_INLINE_ENCRYPTION 189488f6682SSatya Tangirala select CRYPTO 190488f6682SSatya Tangirala select CRYPTO_SKCIPHER 191488f6682SSatya Tangirala help 192488f6682SSatya Tangirala Enabling this lets the block layer handle inline encryption 193488f6682SSatya Tangirala by falling back to the kernel crypto API when inline 194488f6682SSatya Tangirala encryption hardware is not present. 195488f6682SSatya Tangirala 1969be96f3fSAl Virosource "block/partitions/Kconfig" 1979be96f3fSAl Viro 19899874d50SJens Axboeconfig BLOCK_COMPAT 199c50fca55SMasahiro Yamada def_bool COMPAT 20099874d50SJens Axboe 2018ec2ef2bSStephen Rothwellconfig BLK_MQ_PCI 202c50fca55SMasahiro Yamada def_bool PCI 2038ec2ef2bSStephen Rothwell 20473473427SChristoph Hellwigconfig BLK_MQ_VIRTIO 20573473427SChristoph Hellwig bool 206c50fca55SMasahiro Yamada depends on VIRTIO 20773473427SChristoph Hellwig default y 20873473427SChristoph Hellwig 20924c5dc66SSagi Grimbergconfig BLK_MQ_RDMA 21024c5dc66SSagi Grimberg bool 211c50fca55SMasahiro Yamada depends on INFINIBAND 21224c5dc66SSagi Grimberg default y 21324c5dc66SSagi Grimberg 214bca6b067SBart Van Asscheconfig BLK_PM 215c50fca55SMasahiro Yamada def_bool PM 216bca6b067SBart Van Assche 217c66fd019SChristoph Hellwig# do not use in new code 218c66fd019SChristoph Hellwigconfig BLOCK_HOLDER_DEPRECATED 219c66fd019SChristoph Hellwig bool 220c66fd019SChristoph Hellwig 2218636a1f9SMasahiro Yamadasource "block/Kconfig.iosched" 222c50fca55SMasahiro Yamada 223c50fca55SMasahiro Yamadaendif # BLOCK 224