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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 |
88459642 | 8 | select SBITMAP |
6a83e74d | 9 | select SRCU |
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 | |
28 | ||
90c699a9 BZ |
29 | config LBDAF |
30 | bool "Support for large (2TB+) block devices and files" | |
e6243863 | 31 | depends on !64BIT |
db29a6b4 | 32 | default y |
3a65dfe8 | 33 | help |
b3a6ffe1 | 34 | Enable block devices or files of size 2TB and larger. |
ee86418d NA |
35 | |
36 | This option is required to support the full capacity of large | |
37 | (2TB+) block devices, including RAID, disk, Network Block Device, | |
38 | Logical Volume Manager (LVM) and loopback. | |
b3a6ffe1 JA |
39 | |
40 | This option also enables support for single files larger than | |
41 | 2TB. | |
ee86418d | 42 | |
4d783b09 TT |
43 | The ext4 filesystem requires that this feature be enabled in |
44 | order to support filesystems that have the huge_file feature | |
db29a6b4 BZ |
45 | enabled. Otherwise, it will refuse to mount in the read-write |
46 | mode any filesystems that use the huge_file feature, which is | |
47 | enabled by default by mke2fs.ext4. | |
4d783b09 | 48 | |
db29a6b4 BZ |
49 | The GFS2 filesystem also requires this feature. |
50 | ||
51 | If unsure, say Y. | |
3a65dfe8 | 52 | |
72148aec CH |
53 | config BLK_SCSI_REQUEST |
54 | bool | |
55 | ||
3d6392cf | 56 | config BLK_DEV_BSG |
14d9fa35 JS |
57 | bool "Block layer SG support v4" |
58 | default y | |
72148aec | 59 | select BLK_SCSI_REQUEST |
14d9fa35 | 60 | help |
ee86418d NA |
61 | Saying Y here will enable generic SG (SCSI generic) v4 support |
62 | for any block device. | |
63 | ||
64 | Unlike SG v3 (aka block/scsi_ioctl.c drivers/scsi/sg.c), SG v4 | |
65 | can handle complicated SCSI commands: tagged variable length cdbs | |
66 | with bidirectional data transfers and generic request/response | |
67 | protocols (e.g. Task Management Functions and SMP in Serial | |
68 | Attached SCSI). | |
69 | ||
14d9fa35 JS |
70 | This option is required by recent UDEV versions to properly |
71 | access device serial numbers, etc. | |
72 | ||
73 | If unsure, say Y. | |
3d6392cf | 74 | |
aa387cc8 MC |
75 | config BLK_DEV_BSGLIB |
76 | bool "Block layer SG support v4 helper lib" | |
aa387cc8 | 77 | select BLK_DEV_BSG |
72148aec | 78 | select BLK_SCSI_REQUEST |
aa387cc8 MC |
79 | help |
80 | Subsystems will normally enable this if needed. Users will not | |
81 | normally need to manually enable this. | |
82 | ||
83 | If unsure, say N. | |
84 | ||
7ba1ba12 MP |
85 | config BLK_DEV_INTEGRITY |
86 | bool "Block layer data integrity support" | |
2341c2f8 | 87 | select CRC_T10DIF if BLK_DEV_INTEGRITY |
7ba1ba12 MP |
88 | ---help--- |
89 | Some storage devices allow extra information to be | |
90 | stored/retrieved to help protect the data. The block layer | |
91 | data integrity option provides hooks which can be used by | |
92 | filesystems to ensure better data integrity. | |
93 | ||
94 | Say yes here if you have a storage device that provides the | |
95 | T10/SCSI Data Integrity Field or the T13/ATA External Path | |
96 | Protection. If in doubt, say N. | |
97 | ||
6a0cb1bc HR |
98 | config BLK_DEV_ZONED |
99 | bool "Zoned block device support" | |
100 | ---help--- | |
101 | Block layer zoned block device support. This option enables | |
102 | support for ZAC/ZBC host-managed and host-aware zoned block devices. | |
103 | ||
104 | Say yes here if you have a ZAC or ZBC storage device. | |
105 | ||
e43473b7 VG |
106 | config BLK_DEV_THROTTLING |
107 | bool "Block layer bio throttling support" | |
8e42e0a2 | 108 | depends on BLK_CGROUP=y |
e43473b7 VG |
109 | ---help--- |
110 | Block layer bio throttling support. It can be used to limit | |
111 | the IO rate to a device. IO rate policies are per cgroup and | |
112 | one needs to mount and use blkio cgroup controller for creating | |
113 | cgroups and specifying per device IO rate policies. | |
114 | ||
5fb94e9c | 115 | See Documentation/cgroup-v1/blkio-controller.txt for more information. |
e43473b7 | 116 | |
327ffb9b SL |
117 | config BLK_DEV_THROTTLING_LOW |
118 | bool "Block throttling .low limit interface support (EXPERIMENTAL)" | |
119 | depends on BLK_DEV_THROTTLING | |
327ffb9b SL |
120 | ---help--- |
121 | Add .low limit interface for block throttling. The low limit is a best | |
122 | effort limit to prioritize cgroups. Depending on the setting, the limit | |
123 | can be used to protect cgroups in terms of bandwidth/iops and better | |
124 | utilize disk resource. | |
125 | ||
126 | Note, this is an experimental interface and could be changed someday. | |
127 | ||
080506ad | 128 | config BLK_CMDLINE_PARSER |
bab55417 | 129 | bool "Block device command line partition parser" |
bab55417 | 130 | ---help--- |
080506ad PG |
131 | Enabling this option allows you to specify the partition layout from |
132 | the kernel boot args. This is typically of use for embedded devices | |
133 | which don't otherwise have any standardized method for listing the | |
134 | partitions on a block device. | |
135 | ||
136 | See Documentation/block/cmdline-partition.txt for more information. | |
bab55417 | 137 | |
87760e5e JA |
138 | config BLK_WBT |
139 | bool "Enable support for block device writeback throttling" | |
87760e5e JA |
140 | ---help--- |
141 | Enabling this option enables the block layer to throttle buffered | |
142 | background writeback from the VM, making it more smooth and having | |
143 | less impact on foreground operations. The throttling is done | |
144 | dynamically on an algorithm loosely based on CoDel, factoring in | |
145 | the realtime performance of the disk. | |
146 | ||
d7067512 JB |
147 | config BLK_CGROUP_IOLATENCY |
148 | bool "Enable support for latency based cgroup IO protection" | |
149 | depends on BLK_CGROUP=y | |
d7067512 JB |
150 | ---help--- |
151 | Enabling this option enables the .latency interface for IO throttling. | |
152 | The IO controller will attempt to maintain average IO latencies below | |
153 | the configured latency target, throttling anybody with a higher latency | |
154 | target than the victimized group. | |
155 | ||
156 | Note, this is an experimental interface and could be changed someday. | |
157 | ||
87760e5e JA |
158 | config BLK_WBT_MQ |
159 | bool "Multiqueue writeback throttling" | |
160 | default y | |
161 | depends on BLK_WBT | |
162 | ---help--- | |
163 | Enable writeback throttling by default on multiqueue devices. | |
164 | Multiqueue currently doesn't have support for IO scheduling, | |
165 | enabling this option is recommended. | |
166 | ||
400f73b2 OS |
167 | config BLK_DEBUG_FS |
168 | bool "Block layer debugging information in debugfs" | |
169 | default y | |
170 | depends on DEBUG_FS | |
171 | ---help--- | |
172 | Include block layer debugging information in debugfs. This information | |
173 | is mostly useful for kernel developers, but it doesn't incur any cost | |
174 | at runtime. | |
175 | ||
176 | Unless you are building a kernel for a tiny system, you should | |
177 | say Y here. | |
178 | ||
6a5ac984 BVA |
179 | config BLK_DEBUG_FS_ZONED |
180 | bool | |
181 | default BLK_DEBUG_FS && BLK_DEV_ZONED | |
182 | ||
455a7b23 SB |
183 | config BLK_SED_OPAL |
184 | bool "Logic for interfacing with Opal enabled SEDs" | |
185 | ---help--- | |
186 | Builds Logic for interfacing with Opal enabled controllers. | |
187 | Enabling this option enables users to setup/unlock/lock | |
188 | Locking ranges for SED devices using the Opal protocol. | |
189 | ||
9be96f3f AV |
190 | menu "Partition Types" |
191 | ||
192 | source "block/partitions/Kconfig" | |
193 | ||
194 | endmenu | |
195 | ||
2b9e0aae LT |
196 | endif # BLOCK |
197 | ||
99874d50 JA |
198 | config BLOCK_COMPAT |
199 | bool | |
2b9e0aae | 200 | depends on BLOCK && COMPAT |
99874d50 JA |
201 | default y |
202 | ||
8ec2ef2b SR |
203 | config BLK_MQ_PCI |
204 | bool | |
205 | depends on BLOCK && PCI | |
206 | default y | |
207 | ||
73473427 CH |
208 | config BLK_MQ_VIRTIO |
209 | bool | |
210 | depends on BLOCK && VIRTIO | |
211 | default y | |
212 | ||
24c5dc66 SG |
213 | config BLK_MQ_RDMA |
214 | bool | |
215 | depends on BLOCK && INFINIBAND | |
216 | default y | |
217 | ||
bca6b067 BVA |
218 | config BLK_PM |
219 | def_bool BLOCK && PM | |
220 | ||
8636a1f9 | 221 | source "block/Kconfig.iosched" |