Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
3a65dfe8 JA |
2 | # |
3 | # Block layer core configuration | |
4 | # | |
16ed002f | 5 | menuconfig BLOCK |
6a108a14 | 6 | bool "Enable the block layer" if EXPERT |
9361401e | 7 | default y |
487c607d | 8 | select FS_IOMAP |
88459642 | 9 | select SBITMAP |
9361401e | 10 | help |
ee86418d | 11 | Provide block layer support for the kernel. |
9361401e | 12 | |
ee86418d NA |
13 | Disable this option to remove the block layer support from the |
14 | kernel. This may be useful for embedded devices. | |
15 | ||
16 | If this option is disabled: | |
17 | ||
18 | - block device files will become unusable | |
19 | - some filesystems (such as ext3) will become unavailable. | |
20 | ||
21 | Also, SCSI character devices and USB storage will be disabled since | |
22 | they make use of various block layer definitions and facilities. | |
9361401e DH |
23 | |
24 | Say Y here unless you know you really don't want to mount disks and | |
25 | suchlike. | |
26 | ||
27 | if BLOCK | |
3a65dfe8 | 28 | |
fbdee71b CH |
29 | config BLOCK_LEGACY_AUTOLOAD |
30 | bool "Legacy autoloading support" | |
451f0b6f | 31 | default y |
fbdee71b CH |
32 | help |
33 | Enable loading modules and creating block device instances based on | |
34 | accesses through their device special file. This is a historic Linux | |
35 | feature and makes no sense in a udev world where device files are | |
451f0b6f CH |
36 | created on demand, but scripts that manually create device nodes and |
37 | then call losetup might rely on this behavior. | |
fbdee71b | 38 | |
6f816b4b TH |
39 | config BLK_RQ_ALLOC_TIME |
40 | bool | |
41 | ||
1d156646 TH |
42 | config BLK_CGROUP_RWSTAT |
43 | bool | |
44 | ||
2c275afe CH |
45 | config BLK_CGROUP_PUNT_BIO |
46 | bool | |
47 | ||
78011042 CH |
48 | config BLK_DEV_BSG_COMMON |
49 | tristate | |
3d6392cf | 50 | |
5ef16305 CH |
51 | config BLK_ICQ |
52 | bool | |
53 | ||
aa387cc8 MC |
54 | config BLK_DEV_BSGLIB |
55 | bool "Block layer SG support v4 helper lib" | |
78011042 | 56 | select BLK_DEV_BSG_COMMON |
aa387cc8 MC |
57 | help |
58 | Subsystems will normally enable this if needed. Users will not | |
59 | normally need to manually enable this. | |
60 | ||
61 | If unsure, say N. | |
62 | ||
7ba1ba12 MP |
63 | config BLK_DEV_INTEGRITY |
64 | bool "Block layer data integrity support" | |
e9f5f44a CH |
65 | select CRC_T10DIF |
66 | select CRC64_ROCKSOFT | |
a7f7f624 | 67 | help |
7ba1ba12 MP |
68 | Some storage devices allow extra information to be |
69 | stored/retrieved to help protect the data. The block layer | |
70 | data integrity option provides hooks which can be used by | |
71 | filesystems to ensure better data integrity. | |
72 | ||
73 | Say yes here if you have a storage device that provides the | |
74 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
75 | Protection. If in doubt, say N. | |
76 | ||
ed5cc702 JK |
77 | config BLK_DEV_WRITE_MOUNTED |
78 | bool "Allow writing to mounted block devices" | |
79 | default y | |
80 | help | |
81 | When a block device is mounted, writing to its buffer cache is very | |
82 | likely going to cause filesystem corruption. It is also rather easy to | |
83 | crash the kernel in this way since the filesystem has no practical way | |
84 | of detecting these writes to buffer cache and verifying its metadata | |
85 | integrity. However there are some setups that need this capability | |
86 | like running fsck on read-only mounted root device, modifying some | |
87 | features on mounted ext4 filesystem, and similar. If you say N, the | |
88 | kernel will prevent processes from writing to block devices that are | |
89 | mounted by filesystems which provides some more protection from runaway | |
90 | privileged processes and generally makes it much harder to crash | |
91 | filesystem drivers. Note however that this does not prevent | |
92 | underlying device(s) from being modified by other means, e.g. by | |
93 | directly submitting SCSI commands or through access to lower layers of | |
94 | storage stack. If in doubt, say Y. The configuration can be overridden | |
95 | with the bdev_allow_write_mounted boot option. | |
96 | ||
6a0cb1bc HR |
97 | config BLK_DEV_ZONED |
98 | bool "Zoned block device support" | |
a7f7f624 | 99 | help |
6a0cb1bc | 100 | Block layer zoned block device support. This option enables |
240e6ee2 KB |
101 | support for ZAC/ZBC/ZNS host-managed and host-aware zoned block |
102 | devices. | |
6a0cb1bc | 103 | |
240e6ee2 | 104 | Say yes here if you have a ZAC, ZBC, or ZNS storage device. |
6a0cb1bc | 105 | |
e43473b7 VG |
106 | config BLK_DEV_THROTTLING |
107 | bool "Block layer bio throttling support" | |
df252bde | 108 | depends on BLK_CGROUP |
1d156646 | 109 | select BLK_CGROUP_RWSTAT |
a7f7f624 | 110 | help |
e43473b7 VG |
111 | Block layer bio throttling support. It can be used to limit |
112 | the IO rate to a device. IO rate policies are per cgroup and | |
113 | one needs to mount and use blkio cgroup controller for creating | |
114 | cgroups and specifying per device IO rate policies. | |
115 | ||
da82c92f | 116 | See Documentation/admin-guide/cgroup-v1/blkio-controller.rst for more information. |
e43473b7 | 117 | |
87760e5e JA |
118 | config BLK_WBT |
119 | bool "Enable support for block device writeback throttling" | |
a7f7f624 | 120 | help |
87760e5e JA |
121 | Enabling this option enables the block layer to throttle buffered |
122 | background writeback from the VM, making it more smooth and having | |
123 | less impact on foreground operations. The throttling is done | |
124 | dynamically on an algorithm loosely based on CoDel, factoring in | |
125 | the realtime performance of the disk. | |
126 | ||
5f6776ba BVA |
127 | config BLK_WBT_MQ |
128 | bool "Enable writeback throttling by default" | |
129 | default y | |
130 | depends on BLK_WBT | |
131 | help | |
132 | Enable writeback throttling by default for request-based block devices. | |
133 | ||
d7067512 JB |
134 | config BLK_CGROUP_IOLATENCY |
135 | bool "Enable support for latency based cgroup IO protection" | |
df252bde | 136 | depends on BLK_CGROUP |
a7f7f624 | 137 | help |
d7067512 JB |
138 | Enabling this option enables the .latency interface for IO throttling. |
139 | The IO controller will attempt to maintain average IO latencies below | |
140 | the configured latency target, throttling anybody with a higher latency | |
141 | target than the victimized group. | |
142 | ||
143 | Note, this is an experimental interface and could be changed someday. | |
144 | ||
d2bcbeab MK |
145 | config BLK_CGROUP_FC_APPID |
146 | bool "Enable support to track FC I/O Traffic across cgroup applications" | |
d2500a0c | 147 | depends on BLK_CGROUP && NVME_FC |
d2bcbeab MK |
148 | help |
149 | Enabling this option enables the support to track FC I/O traffic across | |
150 | cgroup applications. It enables the Fabric and the storage targets to | |
151 | identify, monitor, and handle FC traffic based on VM tags by inserting | |
152 | application specific identification into the FC frame. | |
153 | ||
7caa4715 TH |
154 | config BLK_CGROUP_IOCOST |
155 | bool "Enable support for cost model based cgroup IO controller" | |
df252bde | 156 | depends on BLK_CGROUP |
7caa4715 | 157 | select BLK_RQ_ALLOC_TIME |
a7f7f624 | 158 | help |
7caa4715 TH |
159 | Enabling this option enables the .weight interface for cost |
160 | model based proportional IO control. The IO controller | |
161 | distributes IO capacity between different groups based on | |
162 | their share of the overall weight distribution. | |
163 | ||
556910e3 BVA |
164 | config BLK_CGROUP_IOPRIO |
165 | bool "Cgroup I/O controller for assigning an I/O priority class" | |
166 | depends on BLK_CGROUP | |
167 | help | |
168 | Enable the .prio interface for assigning an I/O priority class to | |
169 | requests. The I/O priority class affects the order in which an I/O | |
170 | scheduler and block devices process requests. Only some I/O schedulers | |
171 | and some block devices support I/O priorities. | |
172 | ||
400f73b2 OS |
173 | config BLK_DEBUG_FS |
174 | bool "Block layer debugging information in debugfs" | |
175 | default y | |
176 | depends on DEBUG_FS | |
a7f7f624 | 177 | help |
400f73b2 OS |
178 | Include block layer debugging information in debugfs. This information |
179 | is mostly useful for kernel developers, but it doesn't incur any cost | |
180 | at runtime. | |
181 | ||
182 | Unless you are building a kernel for a tiny system, you should | |
183 | say Y here. | |
184 | ||
455a7b23 SB |
185 | config BLK_SED_OPAL |
186 | bool "Logic for interfacing with Opal enabled SEDs" | |
3bfeb612 GJ |
187 | depends on KEYS |
188 | select PSERIES_PLPKS if PPC_PSERIES | |
ec8cf230 | 189 | select PSERIES_PLPKS_SED if PPC_PSERIES |
a7f7f624 | 190 | help |
455a7b23 SB |
191 | Builds Logic for interfacing with Opal enabled controllers. |
192 | Enabling this option enables users to setup/unlock/lock | |
193 | Locking ranges for SED devices using the Opal protocol. | |
194 | ||
1b262839 ST |
195 | config BLK_INLINE_ENCRYPTION |
196 | bool "Enable inline encryption support in block layer" | |
197 | help | |
198 | Build the blk-crypto subsystem. Enabling this lets the | |
199 | block layer handle encryption, so users can take | |
200 | advantage of inline encryption hardware if present. | |
201 | ||
488f6682 ST |
202 | config BLK_INLINE_ENCRYPTION_FALLBACK |
203 | bool "Enable crypto API fallback for blk-crypto" | |
204 | depends on BLK_INLINE_ENCRYPTION | |
205 | select CRYPTO | |
206 | select CRYPTO_SKCIPHER | |
207 | help | |
208 | Enabling this lets the block layer handle inline encryption | |
209 | by falling back to the kernel crypto API when inline | |
210 | encryption hardware is not present. | |
211 | ||
9be96f3f AV |
212 | source "block/partitions/Kconfig" |
213 | ||
8ec2ef2b | 214 | config BLK_MQ_PCI |
c50fca55 | 215 | def_bool PCI |
8ec2ef2b | 216 | |
73473427 CH |
217 | config BLK_MQ_VIRTIO |
218 | bool | |
c50fca55 | 219 | depends on VIRTIO |
73473427 CH |
220 | default y |
221 | ||
bca6b067 | 222 | config BLK_PM |
c50fca55 | 223 | def_bool PM |
bca6b067 | 224 | |
c66fd019 CH |
225 | # do not use in new code |
226 | config BLOCK_HOLDER_DEPRECATED | |
227 | bool | |
228 | ||
248c7933 CH |
229 | config BLK_MQ_STACKING |
230 | bool | |
231 | ||
8636a1f9 | 232 | source "block/Kconfig.iosched" |
c50fca55 MY |
233 | |
234 | endif # BLOCK |