Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | # SPDX-License-Identifier: GPL-2.0 |
Jens Axboe | 3a65dfe | 2005-11-04 08:43:35 +0100 | [diff] [blame] | 2 | # |
| 3 | # Block layer core configuration |
| 4 | # |
Jan Engelhardt | 16ed002 | 2007-07-10 12:24:11 +0200 | [diff] [blame] | 5 | menuconfig BLOCK |
David Rientjes | 6a108a1 | 2011-01-20 14:44:16 -0800 | [diff] [blame] | 6 | bool "Enable the block layer" if EXPERT |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 7 | default y |
Omar Sandoval | 8845964 | 2016-09-17 08:38:44 -0600 | [diff] [blame] | 8 | select SBITMAP |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 9 | help |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 10 | Provide block layer support for the kernel. |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 11 | |
Nick Andrew | ee86418 | 2008-04-21 09:51:04 +0200 | [diff] [blame] | 12 | Disable this option to remove the block layer support from the |
| 13 | kernel. This may be useful for embedded devices. |
| 14 | |
| 15 | If this option is disabled: |
| 16 | |
| 17 | - block device files will become unusable |
| 18 | - some filesystems (such as ext3) will become unavailable. |
| 19 | |
| 20 | Also, SCSI character devices and USB storage will be disabled since |
| 21 | they make use of various block layer definitions and facilities. |
David Howells | 9361401 | 2006-09-30 20:45:40 +0200 | [diff] [blame] | 22 | |
| 23 | Say Y here unless you know you really don't want to mount disks and |
| 24 | suchlike. |
| 25 | |
| 26 | if BLOCK |
| 27 | |
Christoph Hellwig | fbdee71 | 2022-01-04 08:16:47 +0100 | [diff] [blame] | 28 | config BLOCK_LEGACY_AUTOLOAD |
| 29 | bool "Legacy autoloading support" |
Christoph Hellwig | 451f0b6 | 2022-02-25 19:14:40 +0100 | [diff] [blame] | 30 | default y |
Christoph Hellwig | fbdee71 | 2022-01-04 08:16:47 +0100 | [diff] [blame] | 31 | help |
| 32 | Enable loading modules and creating block device instances based on |
| 33 | accesses through their device special file. This is a historic Linux |
| 34 | feature and makes no sense in a udev world where device files are |
Christoph Hellwig | 451f0b6 | 2022-02-25 19:14:40 +0100 | [diff] [blame] | 35 | created on demand, but scripts that manually create device nodes and |
| 36 | then call losetup might rely on this behavior. |
Christoph Hellwig | fbdee71 | 2022-01-04 08:16:47 +0100 | [diff] [blame] | 37 | |
Tejun Heo | 6f816b4 | 2019-08-28 15:05:57 -0700 | [diff] [blame] | 38 | config BLK_RQ_ALLOC_TIME |
| 39 | bool |
| 40 | |
Tejun Heo | 1d156646 | 2019-11-07 11:18:04 -0800 | [diff] [blame] | 41 | config BLK_CGROUP_RWSTAT |
| 42 | bool |
| 43 | |
Christoph Hellwig | 2c275af | 2023-03-27 09:49:53 +0900 | [diff] [blame] | 44 | config BLK_CGROUP_PUNT_BIO |
| 45 | bool |
| 46 | |
Christoph Hellwig | 7801104 | 2021-07-24 09:20:23 +0200 | [diff] [blame] | 47 | config BLK_DEV_BSG_COMMON |
| 48 | tristate |
Jens Axboe | 3d6392c | 2007-07-09 12:38:05 +0200 | [diff] [blame] | 49 | |
Christoph Hellwig | 5ef1630 | 2021-12-09 07:31:31 +0100 | [diff] [blame] | 50 | config BLK_ICQ |
| 51 | bool |
| 52 | |
Mike Christie | aa387cc | 2011-07-31 22:05:09 +0200 | [diff] [blame] | 53 | config BLK_DEV_BSGLIB |
| 54 | bool "Block layer SG support v4 helper lib" |
Christoph Hellwig | 7801104 | 2021-07-24 09:20:23 +0200 | [diff] [blame] | 55 | select BLK_DEV_BSG_COMMON |
Mike Christie | aa387cc | 2011-07-31 22:05:09 +0200 | [diff] [blame] | 56 | help |
| 57 | Subsystems will normally enable this if needed. Users will not |
| 58 | normally need to manually enable this. |
| 59 | |
| 60 | If unsure, say N. |
| 61 | |
Martin K. Petersen | 7ba1ba1 | 2008-06-30 20:04:41 +0200 | [diff] [blame] | 62 | config BLK_DEV_INTEGRITY |
| 63 | bool "Block layer data integrity support" |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 64 | help |
Martin K. Petersen | 7ba1ba1 | 2008-06-30 20:04:41 +0200 | [diff] [blame] | 65 | Some storage devices allow extra information to be |
| 66 | stored/retrieved to help protect the data. The block layer |
| 67 | data integrity option provides hooks which can be used by |
| 68 | filesystems to ensure better data integrity. |
| 69 | |
| 70 | Say yes here if you have a storage device that provides the |
| 71 | T10/SCSI Data Integrity Field or the T13/ATA External Path |
| 72 | Protection. If in doubt, say N. |
| 73 | |
Herbert Xu | a754bd5 | 2019-12-23 16:13:51 +0800 | [diff] [blame] | 74 | config BLK_DEV_INTEGRITY_T10 |
| 75 | tristate |
| 76 | depends on BLK_DEV_INTEGRITY |
| 77 | select CRC_T10DIF |
Keith Busch | a7d4383 | 2022-03-03 12:13:11 -0800 | [diff] [blame] | 78 | select CRC64_ROCKSOFT |
Herbert Xu | a754bd5 | 2019-12-23 16:13:51 +0800 | [diff] [blame] | 79 | |
Hannes Reinecke | 6a0cb1b | 2016-10-18 15:40:33 +0900 | [diff] [blame] | 80 | config BLK_DEV_ZONED |
| 81 | bool "Zoned block device support" |
Damien Le Moal | b9aef63 | 2019-06-04 16:23:40 +0900 | [diff] [blame] | 82 | select MQ_IOSCHED_DEADLINE |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 83 | help |
Hannes Reinecke | 6a0cb1b | 2016-10-18 15:40:33 +0900 | [diff] [blame] | 84 | Block layer zoned block device support. This option enables |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 85 | support for ZAC/ZBC/ZNS host-managed and host-aware zoned block |
| 86 | devices. |
Hannes Reinecke | 6a0cb1b | 2016-10-18 15:40:33 +0900 | [diff] [blame] | 87 | |
Keith Busch | 240e6ee | 2020-06-29 12:06:41 -0700 | [diff] [blame] | 88 | Say yes here if you have a ZAC, ZBC, or ZNS storage device. |
Hannes Reinecke | 6a0cb1b | 2016-10-18 15:40:33 +0900 | [diff] [blame] | 89 | |
Vivek Goyal | e43473b | 2010-09-15 17:06:35 -0400 | [diff] [blame] | 90 | config BLK_DEV_THROTTLING |
| 91 | bool "Block layer bio throttling support" |
Masahiro Yamada | df252bd | 2021-09-27 22:59:57 +0900 | [diff] [blame] | 92 | depends on BLK_CGROUP |
Tejun Heo | 1d156646 | 2019-11-07 11:18:04 -0800 | [diff] [blame] | 93 | select BLK_CGROUP_RWSTAT |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 94 | help |
Vivek Goyal | e43473b | 2010-09-15 17:06:35 -0400 | [diff] [blame] | 95 | Block layer bio throttling support. It can be used to limit |
| 96 | the IO rate to a device. IO rate policies are per cgroup and |
| 97 | one needs to mount and use blkio cgroup controller for creating |
| 98 | cgroups and specifying per device IO rate policies. |
| 99 | |
Mauro Carvalho Chehab | da82c92 | 2019-06-27 13:08:35 -0300 | [diff] [blame] | 100 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
Vivek Goyal | e43473b | 2010-09-15 17:06:35 -0400 | [diff] [blame] | 101 | |
Shaohua Li | 327ffb9 | 2017-03-27 10:51:31 -0700 | [diff] [blame] | 102 | config BLK_DEV_THROTTLING_LOW |
| 103 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" |
| 104 | depends on BLK_DEV_THROTTLING |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 105 | help |
Shaohua Li | 327ffb9 | 2017-03-27 10:51:31 -0700 | [diff] [blame] | 106 | Add .low limit interface for block throttling. The low limit is a best |
| 107 | effort limit to prioritize cgroups. Depending on the setting, the limit |
| 108 | can be used to protect cgroups in terms of bandwidth/iops and better |
| 109 | utilize disk resource. |
| 110 | |
| 111 | Note, this is an experimental interface and could be changed someday. |
| 112 | |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 113 | config BLK_WBT |
| 114 | bool "Enable support for block device writeback throttling" |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 115 | help |
Jens Axboe | 87760e5 | 2016-11-09 12:38:14 -0700 | [diff] [blame] | 116 | Enabling this option enables the block layer to throttle buffered |
| 117 | background writeback from the VM, making it more smooth and having |
| 118 | less impact on foreground operations. The throttling is done |
| 119 | dynamically on an algorithm loosely based on CoDel, factoring in |
| 120 | the realtime performance of the disk. |
| 121 | |
Bart Van Assche | 5f6776b | 2021-06-17 17:44:41 -0700 | [diff] [blame] | 122 | config BLK_WBT_MQ |
| 123 | bool "Enable writeback throttling by default" |
| 124 | default y |
| 125 | depends on BLK_WBT |
| 126 | help |
| 127 | Enable writeback throttling by default for request-based block devices. |
| 128 | |
Josef Bacik | d706751 | 2018-07-03 11:15:01 -0400 | [diff] [blame] | 129 | config BLK_CGROUP_IOLATENCY |
| 130 | bool "Enable support for latency based cgroup IO protection" |
Masahiro Yamada | df252bd | 2021-09-27 22:59:57 +0900 | [diff] [blame] | 131 | depends on BLK_CGROUP |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 132 | help |
Josef Bacik | d706751 | 2018-07-03 11:15:01 -0400 | [diff] [blame] | 133 | Enabling this option enables the .latency interface for IO throttling. |
| 134 | The IO controller will attempt to maintain average IO latencies below |
| 135 | the configured latency target, throttling anybody with a higher latency |
| 136 | target than the victimized group. |
| 137 | |
| 138 | Note, this is an experimental interface and could be changed someday. |
| 139 | |
Muneendra Kumar | d2bcbea | 2021-06-08 10:05:45 +0530 | [diff] [blame] | 140 | config BLK_CGROUP_FC_APPID |
| 141 | bool "Enable support to track FC I/O Traffic across cgroup applications" |
Martin K. Petersen | d2500a0 | 2021-07-03 11:58:33 -0400 | [diff] [blame] | 142 | depends on BLK_CGROUP && NVME_FC |
Muneendra Kumar | d2bcbea | 2021-06-08 10:05:45 +0530 | [diff] [blame] | 143 | help |
| 144 | Enabling this option enables the support to track FC I/O traffic across |
| 145 | cgroup applications. It enables the Fabric and the storage targets to |
| 146 | identify, monitor, and handle FC traffic based on VM tags by inserting |
| 147 | application specific identification into the FC frame. |
| 148 | |
Tejun Heo | 7caa471 | 2019-08-28 15:05:58 -0700 | [diff] [blame] | 149 | config BLK_CGROUP_IOCOST |
| 150 | bool "Enable support for cost model based cgroup IO controller" |
Masahiro Yamada | df252bd | 2021-09-27 22:59:57 +0900 | [diff] [blame] | 151 | depends on BLK_CGROUP |
Tejun Heo | 7caa471 | 2019-08-28 15:05:58 -0700 | [diff] [blame] | 152 | select BLK_RQ_ALLOC_TIME |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 153 | help |
Tejun Heo | 7caa471 | 2019-08-28 15:05:58 -0700 | [diff] [blame] | 154 | Enabling this option enables the .weight interface for cost |
| 155 | model based proportional IO control. The IO controller |
| 156 | distributes IO capacity between different groups based on |
| 157 | their share of the overall weight distribution. |
| 158 | |
Bart Van Assche | 556910e | 2021-06-17 17:44:44 -0700 | [diff] [blame] | 159 | config BLK_CGROUP_IOPRIO |
| 160 | bool "Cgroup I/O controller for assigning an I/O priority class" |
| 161 | depends on BLK_CGROUP |
| 162 | help |
| 163 | Enable the .prio interface for assigning an I/O priority class to |
| 164 | requests. The I/O priority class affects the order in which an I/O |
| 165 | scheduler and block devices process requests. Only some I/O schedulers |
| 166 | and some block devices support I/O priorities. |
| 167 | |
Omar Sandoval | 400f73b | 2017-01-27 15:03:01 -0700 | [diff] [blame] | 168 | config BLK_DEBUG_FS |
| 169 | bool "Block layer debugging information in debugfs" |
| 170 | default y |
| 171 | depends on DEBUG_FS |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 172 | help |
Omar Sandoval | 400f73b | 2017-01-27 15:03:01 -0700 | [diff] [blame] | 173 | Include block layer debugging information in debugfs. This information |
| 174 | is mostly useful for kernel developers, but it doesn't incur any cost |
| 175 | at runtime. |
| 176 | |
| 177 | Unless you are building a kernel for a tiny system, you should |
| 178 | say Y here. |
| 179 | |
Bart Van Assche | 6a5ac98 | 2018-06-15 14:55:21 -0700 | [diff] [blame] | 180 | config BLK_DEBUG_FS_ZONED |
| 181 | bool |
| 182 | default BLK_DEBUG_FS && BLK_DEV_ZONED |
| 183 | |
Scott Bauer | 455a7b2 | 2017-02-03 12:50:31 -0700 | [diff] [blame] | 184 | config BLK_SED_OPAL |
| 185 | bool "Logic for interfacing with Opal enabled SEDs" |
Masahiro Yamada | a7f7f62 | 2020-06-14 01:50:22 +0900 | [diff] [blame] | 186 | help |
Scott Bauer | 455a7b2 | 2017-02-03 12:50:31 -0700 | [diff] [blame] | 187 | Builds Logic for interfacing with Opal enabled controllers. |
| 188 | Enabling this option enables users to setup/unlock/lock |
| 189 | Locking ranges for SED devices using the Opal protocol. |
| 190 | |
Satya Tangirala | 1b26283 | 2020-05-14 00:37:17 +0000 | [diff] [blame] | 191 | config BLK_INLINE_ENCRYPTION |
| 192 | bool "Enable inline encryption support in block layer" |
| 193 | help |
| 194 | Build the blk-crypto subsystem. Enabling this lets the |
| 195 | block layer handle encryption, so users can take |
| 196 | advantage of inline encryption hardware if present. |
| 197 | |
Satya Tangirala | 488f668 | 2020-05-14 00:37:20 +0000 | [diff] [blame] | 198 | config BLK_INLINE_ENCRYPTION_FALLBACK |
| 199 | bool "Enable crypto API fallback for blk-crypto" |
| 200 | depends on BLK_INLINE_ENCRYPTION |
| 201 | select CRYPTO |
| 202 | select CRYPTO_SKCIPHER |
| 203 | help |
| 204 | Enabling this lets the block layer handle inline encryption |
| 205 | by falling back to the kernel crypto API when inline |
| 206 | encryption hardware is not present. |
| 207 | |
Al Viro | 9be96f3 | 2011-09-16 00:25:05 -0400 | [diff] [blame] | 208 | source "block/partitions/Kconfig" |
| 209 | |
Stephen Rothwell | 8ec2ef2 | 2016-09-19 15:50:16 +1000 | [diff] [blame] | 210 | config BLK_MQ_PCI |
Masahiro Yamada | c50fca5 | 2021-09-27 22:59:58 +0900 | [diff] [blame] | 211 | def_bool PCI |
Stephen Rothwell | 8ec2ef2 | 2016-09-19 15:50:16 +1000 | [diff] [blame] | 212 | |
Christoph Hellwig | 7347342 | 2017-02-05 18:15:24 +0100 | [diff] [blame] | 213 | config BLK_MQ_VIRTIO |
| 214 | bool |
Masahiro Yamada | c50fca5 | 2021-09-27 22:59:58 +0900 | [diff] [blame] | 215 | depends on VIRTIO |
Christoph Hellwig | 7347342 | 2017-02-05 18:15:24 +0100 | [diff] [blame] | 216 | default y |
| 217 | |
Bart Van Assche | bca6b06 | 2018-09-26 14:01:03 -0700 | [diff] [blame] | 218 | config BLK_PM |
Masahiro Yamada | c50fca5 | 2021-09-27 22:59:58 +0900 | [diff] [blame] | 219 | def_bool PM |
Bart Van Assche | bca6b06 | 2018-09-26 14:01:03 -0700 | [diff] [blame] | 220 | |
Christoph Hellwig | c66fd01 | 2021-08-04 11:41:40 +0200 | [diff] [blame] | 221 | # do not use in new code |
| 222 | config BLOCK_HOLDER_DEPRECATED |
| 223 | bool |
| 224 | |
Christoph Hellwig | 248c793 | 2022-02-15 11:05:36 +0100 | [diff] [blame] | 225 | config BLK_MQ_STACKING |
| 226 | bool |
| 227 | |
Masahiro Yamada | 8636a1f | 2018-12-11 20:01:04 +0900 | [diff] [blame] | 228 | source "block/Kconfig.iosched" |
Masahiro Yamada | c50fca5 | 2021-09-27 22:59:58 +0900 | [diff] [blame] | 229 | |
| 230 | endif # BLOCK |