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Diffstat (limited to 'block/Kconfig')
| -rw-r--r-- | block/Kconfig | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/block/Kconfig b/block/Kconfig new file mode 100644 index 000000000..444c5ab3b --- /dev/null +++ b/block/Kconfig @@ -0,0 +1,236 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Block layer core configuration +# +menuconfig BLOCK + bool "Enable the block layer" if EXPERT + default y + select SBITMAP + select SRCU + help + Provide block layer support for the kernel. + + Disable this option to remove the block layer support from the + kernel. This may be useful for embedded devices. + + If this option is disabled: + + - block device files will become unusable + - some filesystems (such as ext3) will become unavailable. + + Also, SCSI character devices and USB storage will be disabled since + they make use of various block layer definitions and facilities. + + Say Y here unless you know you really don't want to mount disks and + suchlike. + +if BLOCK + +config BLOCK_LEGACY_AUTOLOAD + bool "Legacy autoloading support" + default y + help + Enable loading modules and creating block device instances based on + accesses through their device special file. This is a historic Linux + feature and makes no sense in a udev world where device files are + created on demand, but scripts that manually create device nodes and + then call losetup might rely on this behavior. + +config BLK_RQ_ALLOC_TIME + bool + +config BLK_CGROUP_RWSTAT + bool + +config BLK_DEV_BSG_COMMON + tristate + +config BLK_ICQ + bool + +config BLK_DEV_BSGLIB + bool "Block layer SG support v4 helper lib" + select BLK_DEV_BSG_COMMON + help + Subsystems will normally enable this if needed. Users will not + normally need to manually enable this. + + If unsure, say N. + +config BLK_DEV_INTEGRITY + bool "Block layer data integrity support" + help + Some storage devices allow extra information to be + stored/retrieved to help protect the data. The block layer + data integrity option provides hooks which can be used by + filesystems to ensure better data integrity. + + Say yes here if you have a storage device that provides the + T10/SCSI Data Integrity Field or the T13/ATA External Path + Protection. If in doubt, say N. + +config BLK_DEV_INTEGRITY_T10 + tristate + depends on BLK_DEV_INTEGRITY + select CRC_T10DIF + select CRC64_ROCKSOFT + +config BLK_DEV_ZONED + bool "Zoned block device support" + select MQ_IOSCHED_DEADLINE + help + Block layer zoned block device support. This option enables + support for ZAC/ZBC/ZNS host-managed and host-aware zoned block + devices. + + Say yes here if you have a ZAC, ZBC, or ZNS storage device. + +config BLK_DEV_THROTTLING + bool "Block layer bio throttling support" + depends on BLK_CGROUP + select BLK_CGROUP_RWSTAT + help + Block layer bio throttling support. It can be used to limit + the IO rate to a device. IO rate policies are per cgroup and + one needs to mount and use blkio cgroup controller for creating + cgroups and specifying per device IO rate policies. + + See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. + +config BLK_DEV_THROTTLING_LOW + bool "Block throttling .low limit interface support (EXPERIMENTAL)" + depends on BLK_DEV_THROTTLING + help + Add .low limit interface for block throttling. The low limit is a best + effort limit to prioritize cgroups. Depending on the setting, the limit + can be used to protect cgroups in terms of bandwidth/iops and better + utilize disk resource. + + Note, this is an experimental interface and could be changed someday. + +config BLK_WBT + bool "Enable support for block device writeback throttling" + help + Enabling this option enables the block layer to throttle buffered + background writeback from the VM, making it more smooth and having + less impact on foreground operations. The throttling is done + dynamically on an algorithm loosely based on CoDel, factoring in + the realtime performance of the disk. + +config BLK_WBT_MQ + bool "Enable writeback throttling by default" + default y + depends on BLK_WBT + help + Enable writeback throttling by default for request-based block devices. + +config BLK_CGROUP_IOLATENCY + bool "Enable support for latency based cgroup IO protection" + depends on BLK_CGROUP + help + Enabling this option enables the .latency interface for IO throttling. + The IO controller will attempt to maintain average IO latencies below + the configured latency target, throttling anybody with a higher latency + target than the victimized group. + + Note, this is an experimental interface and could be changed someday. + +config BLK_CGROUP_FC_APPID + bool "Enable support to track FC I/O Traffic across cgroup applications" + depends on BLK_CGROUP && NVME_FC + help + Enabling this option enables the support to track FC I/O traffic across + cgroup applications. It enables the Fabric and the storage targets to + identify, monitor, and handle FC traffic based on VM tags by inserting + application specific identification into the FC frame. + +config BLK_CGROUP_IOCOST + bool "Enable support for cost model based cgroup IO controller" + depends on BLK_CGROUP + select BLK_RQ_ALLOC_TIME + help + Enabling this option enables the .weight interface for cost + model based proportional IO control. The IO controller + distributes IO capacity between different groups based on + their share of the overall weight distribution. + +config BLK_CGROUP_IOPRIO + bool "Cgroup I/O controller for assigning an I/O priority class" + depends on BLK_CGROUP + help + Enable the .prio interface for assigning an I/O priority class to + requests. The I/O priority class affects the order in which an I/O + scheduler and block devices process requests. Only some I/O schedulers + and some block devices support I/O priorities. + +config BLK_DEBUG_FS + bool "Block layer debugging information in debugfs" + default y + depends on DEBUG_FS + help + Include block layer debugging information in debugfs. This information + is mostly useful for kernel developers, but it doesn't incur any cost + at runtime. + + Unless you are building a kernel for a tiny system, you should + say Y here. + +config BLK_DEBUG_FS_ZONED + bool + default BLK_DEBUG_FS && BLK_DEV_ZONED + +config BLK_SED_OPAL + bool "Logic for interfacing with Opal enabled SEDs" + help + Builds Logic for interfacing with Opal enabled controllers. + Enabling this option enables users to setup/unlock/lock + Locking ranges for SED devices using the Opal protocol. + +config BLK_INLINE_ENCRYPTION + bool "Enable inline encryption support in block layer" + help + Build the blk-crypto subsystem. Enabling this lets the + block layer handle encryption, so users can take + advantage of inline encryption hardware if present. + +config BLK_INLINE_ENCRYPTION_FALLBACK + bool "Enable crypto API fallback for blk-crypto" + depends on BLK_INLINE_ENCRYPTION + select CRYPTO + select CRYPTO_SKCIPHER + help + Enabling this lets the block layer handle inline encryption + by falling back to the kernel crypto API when inline + encryption hardware is not present. + +source "block/partitions/Kconfig" + +config BLOCK_COMPAT + def_bool COMPAT + +config BLK_MQ_PCI + def_bool PCI + +config BLK_MQ_VIRTIO + bool + depends on VIRTIO + default y + +config BLK_MQ_RDMA + bool + depends on INFINIBAND + default y + +config BLK_PM + def_bool PM + +# do not use in new code +config BLOCK_HOLDER_DEPRECATED + bool + +config BLK_MQ_STACKING + bool + +source "block/Kconfig.iosched" + +endif # BLOCK |