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TOMOYO Linux Cross Reference
Linux/block/Kconfig

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Diff markup

Differences between /block/Kconfig (Version linux-6.12-rc7) and /block/Kconfig (Version linux-4.20.17)


  1 # SPDX-License-Identifier: GPL-2.0                  1 # SPDX-License-Identifier: GPL-2.0
  2 #                                                   2 #
  3 # Block layer core configuration                    3 # Block layer core configuration
  4 #                                                   4 #
  5 menuconfig BLOCK                                    5 menuconfig BLOCK
  6        bool "Enable the block layer" if EXPERT      6        bool "Enable the block layer" if EXPERT
  7        default y                                    7        default y
  8        select FS_IOMAP                         << 
  9        select SBITMAP                               8        select SBITMAP
                                                   >>   9        select SRCU
 10        help                                        10        help
 11          Provide block layer support for the k     11          Provide block layer support for the kernel.
 12                                                    12 
 13          Disable this option to remove the blo     13          Disable this option to remove the block layer support from the
 14          kernel. This may be useful for embedd     14          kernel. This may be useful for embedded devices.
 15                                                    15 
 16          If this option is disabled:               16          If this option is disabled:
 17                                                    17 
 18            - block device files will become un     18            - block device files will become unusable
 19            - some filesystems (such as ext3) w     19            - some filesystems (such as ext3) will become unavailable.
 20                                                    20 
 21          Also, SCSI character devices and USB      21          Also, SCSI character devices and USB storage will be disabled since
 22          they make use of various block layer      22          they make use of various block layer definitions and facilities.
 23                                                    23 
 24          Say Y here unless you know you really     24          Say Y here unless you know you really don't want to mount disks and
 25          suchlike.                                 25          suchlike.
 26                                                    26 
 27 if BLOCK                                           27 if BLOCK
 28                                                    28 
 29 config BLOCK_LEGACY_AUTOLOAD                   !!  29 config LBDAF
 30         bool "Legacy autoloading support"      !!  30         bool "Support for large (2TB+) block devices and files"
                                                   >>  31         depends on !64BIT
 31         default y                                  32         default y
 32         help                                       33         help
 33           Enable loading modules and creating  !!  34           Enable block devices or files of size 2TB and larger.
 34           accesses through their device specia << 
 35           feature and makes no sense in a udev << 
 36           created on demand, but scripts that  << 
 37           then call losetup might rely on this << 
 38                                                    35 
 39 config BLK_RQ_ALLOC_TIME                       !!  36           This option is required to support the full capacity of large
 40         bool                                   !!  37           (2TB+) block devices, including RAID, disk, Network Block Device,
                                                   >>  38           Logical Volume Manager (LVM) and loopback.
                                                   >>  39         
                                                   >>  40           This option also enables support for single files larger than
                                                   >>  41           2TB.
 41                                                    42 
 42 config BLK_CGROUP_RWSTAT                       !!  43           The ext4 filesystem requires that this feature be enabled in
 43         bool                                   !!  44           order to support filesystems that have the huge_file feature
                                                   >>  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.
 44                                                    48 
 45 config BLK_CGROUP_PUNT_BIO                     !!  49           The GFS2 filesystem also requires this feature.
 46         bool                                   << 
 47                                                    50 
 48 config BLK_DEV_BSG_COMMON                      !!  51           If unsure, say Y.
 49         tristate                               << 
 50                                                    52 
 51 config BLK_ICQ                                 !!  53 config BLK_SCSI_REQUEST
 52         bool                                       54         bool
 53                                                    55 
                                                   >>  56 config BLK_DEV_BSG
                                                   >>  57         bool "Block layer SG support v4"
                                                   >>  58         default y
                                                   >>  59         select BLK_SCSI_REQUEST
                                                   >>  60         help
                                                   >>  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 
                                                   >>  70           This option is required by recent UDEV versions to properly
                                                   >>  71           access device serial numbers, etc.
                                                   >>  72 
                                                   >>  73           If unsure, say Y.
                                                   >>  74 
 54 config BLK_DEV_BSGLIB                              75 config BLK_DEV_BSGLIB
 55         bool "Block layer SG support v4 helper     76         bool "Block layer SG support v4 helper lib"
 56         select BLK_DEV_BSG_COMMON              !!  77         select BLK_DEV_BSG
                                                   >>  78         select BLK_SCSI_REQUEST
 57         help                                       79         help
 58           Subsystems will normally enable this     80           Subsystems will normally enable this if needed. Users will not
 59           normally need to manually enable thi     81           normally need to manually enable this.
 60                                                    82 
 61           If unsure, say N.                        83           If unsure, say N.
 62                                                    84 
 63 config BLK_DEV_INTEGRITY                           85 config BLK_DEV_INTEGRITY
 64         bool "Block layer data integrity suppo     86         bool "Block layer data integrity support"
 65         select CRC_T10DIF                      !!  87         select CRC_T10DIF if BLK_DEV_INTEGRITY
 66         select CRC64_ROCKSOFT                  !!  88         ---help---
 67         help                                   << 
 68         Some storage devices allow extra infor     89         Some storage devices allow extra information to be
 69         stored/retrieved to help protect the d     90         stored/retrieved to help protect the data.  The block layer
 70         data integrity option provides hooks w     91         data integrity option provides hooks which can be used by
 71         filesystems to ensure better data inte     92         filesystems to ensure better data integrity.
 72                                                    93 
 73         Say yes here if you have a storage dev     94         Say yes here if you have a storage device that provides the
 74         T10/SCSI Data Integrity Field or the T     95         T10/SCSI Data Integrity Field or the T13/ATA External Path
 75         Protection.  If in doubt, say N.           96         Protection.  If in doubt, say N.
 76                                                    97 
 77 config BLK_DEV_WRITE_MOUNTED                   << 
 78         bool "Allow writing to mounted block d << 
 79         default y                              << 
 80         help                                   << 
 81         When a block device is mounted, writin << 
 82         likely going to cause filesystem corru << 
 83         crash the kernel in this way since the << 
 84         of detecting these writes to buffer ca << 
 85         integrity. However there are some setu << 
 86         like running fsck on read-only mounted << 
 87         features on mounted ext4 filesystem, a << 
 88         kernel will prevent processes from wri << 
 89         mounted by filesystems which provides  << 
 90         privileged processes and generally mak << 
 91         filesystem drivers. Note however that  << 
 92         underlying device(s) from being modifi << 
 93         directly submitting SCSI commands or t << 
 94         storage stack. If in doubt, say Y. The << 
 95         with the bdev_allow_write_mounted boot << 
 96                                                << 
 97 config BLK_DEV_ZONED                               98 config BLK_DEV_ZONED
 98         bool "Zoned block device support"          99         bool "Zoned block device support"
 99         help                                   !! 100         ---help---
100         Block layer zoned block device support    101         Block layer zoned block device support. This option enables
101         support for ZAC/ZBC/ZNS host-managed a !! 102         support for ZAC/ZBC host-managed and host-aware zoned block devices.
102         devices.                               << 
103                                                   103 
104         Say yes here if you have a ZAC, ZBC, o !! 104         Say yes here if you have a ZAC or ZBC storage device.
105                                                   105 
106 config BLK_DEV_THROTTLING                         106 config BLK_DEV_THROTTLING
107         bool "Block layer bio throttling suppo    107         bool "Block layer bio throttling support"
108         depends on BLK_CGROUP                  !! 108         depends on BLK_CGROUP=y
109         select BLK_CGROUP_RWSTAT               !! 109         ---help---
110         help                                   << 
111         Block layer bio throttling support. It    110         Block layer bio throttling support. It can be used to limit
112         the IO rate to a device. IO rate polic    111         the IO rate to a device. IO rate policies are per cgroup and
113         one needs to mount and use blkio cgrou    112         one needs to mount and use blkio cgroup controller for creating
114         cgroups and specifying per device IO r    113         cgroups and specifying per device IO rate policies.
115                                                   114 
116         See Documentation/admin-guide/cgroup-v !! 115         See Documentation/cgroup-v1/blkio-controller.txt for more information.
                                                   >> 116 
                                                   >> 117 config BLK_DEV_THROTTLING_LOW
                                                   >> 118         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
                                                   >> 119         depends on BLK_DEV_THROTTLING
                                                   >> 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 
                                                   >> 128 config BLK_CMDLINE_PARSER
                                                   >> 129         bool "Block device command line partition parser"
                                                   >> 130         ---help---
                                                   >> 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.
117                                                   137 
118 config BLK_WBT                                    138 config BLK_WBT
119         bool "Enable support for block device     139         bool "Enable support for block device writeback throttling"
120         help                                   !! 140         ---help---
121         Enabling this option enables the block    141         Enabling this option enables the block layer to throttle buffered
122         background writeback from the VM, maki    142         background writeback from the VM, making it more smooth and having
123         less impact on foreground operations.     143         less impact on foreground operations. The throttling is done
124         dynamically on an algorithm loosely ba    144         dynamically on an algorithm loosely based on CoDel, factoring in
125         the realtime performance of the disk.     145         the realtime performance of the disk.
126                                                   146 
127 config BLK_WBT_MQ                              << 
128         bool "Enable writeback throttling by d << 
129         default y                              << 
130         depends on BLK_WBT                     << 
131         help                                   << 
132         Enable writeback throttling by default << 
133                                                << 
134 config BLK_CGROUP_IOLATENCY                       147 config BLK_CGROUP_IOLATENCY
135         bool "Enable support for latency based    148         bool "Enable support for latency based cgroup IO protection"
136         depends on BLK_CGROUP                  !! 149         depends on BLK_CGROUP=y
137         help                                   !! 150         ---help---
138         Enabling this option enables the .late    151         Enabling this option enables the .latency interface for IO throttling.
139         The IO controller will attempt to main    152         The IO controller will attempt to maintain average IO latencies below
140         the configured latency target, throttl    153         the configured latency target, throttling anybody with a higher latency
141         target than the victimized group.         154         target than the victimized group.
142                                                   155 
143         Note, this is an experimental interfac    156         Note, this is an experimental interface and could be changed someday.
144                                                   157 
145 config BLK_CGROUP_FC_APPID                     !! 158 config BLK_WBT_SQ
146         bool "Enable support to track FC I/O T !! 159         bool "Single queue writeback throttling"
147         depends on BLK_CGROUP && NVME_FC       !! 160         depends on BLK_WBT
148         help                                   !! 161         ---help---
149           Enabling this option enables the sup !! 162         Enable writeback throttling by default on legacy single queue devices
150           cgroup applications. It enables the  !! 163 
151           identify, monitor, and handle FC tra !! 164 config BLK_WBT_MQ
152           application specific identification  !! 165         bool "Multiqueue writeback throttling"
153                                                !! 166         default y
154 config BLK_CGROUP_IOCOST                       !! 167         depends on BLK_WBT
155         bool "Enable support for cost model ba !! 168         ---help---
156         depends on BLK_CGROUP                  !! 169         Enable writeback throttling by default on multiqueue devices.
157         select BLK_RQ_ALLOC_TIME               !! 170         Multiqueue currently doesn't have support for IO scheduling,
158         help                                   !! 171         enabling this option is recommended.
159         Enabling this option enables the .weig << 
160         model based proportional IO control.   << 
161         distributes IO capacity between differ << 
162         their share of the overall weight dist << 
163                                                << 
164 config BLK_CGROUP_IOPRIO                       << 
165         bool "Cgroup I/O controller for assign << 
166         depends on BLK_CGROUP                  << 
167         help                                   << 
168         Enable the .prio interface for assigni << 
169         requests. The I/O priority class affec << 
170         scheduler and block devices process re << 
171         and some block devices support I/O pri << 
172                                                   172 
173 config BLK_DEBUG_FS                               173 config BLK_DEBUG_FS
174         bool "Block layer debugging informatio    174         bool "Block layer debugging information in debugfs"
175         default y                                 175         default y
176         depends on DEBUG_FS                       176         depends on DEBUG_FS
177         help                                   !! 177         ---help---
178         Include block layer debugging informat    178         Include block layer debugging information in debugfs. This information
179         is mostly useful for kernel developers    179         is mostly useful for kernel developers, but it doesn't incur any cost
180         at runtime.                               180         at runtime.
181                                                   181 
182         Unless you are building a kernel for a    182         Unless you are building a kernel for a tiny system, you should
183         say Y here.                               183         say Y here.
184                                                   184 
                                                   >> 185 config BLK_DEBUG_FS_ZONED
                                                   >> 186        bool
                                                   >> 187        default BLK_DEBUG_FS && BLK_DEV_ZONED
                                                   >> 188 
185 config BLK_SED_OPAL                               189 config BLK_SED_OPAL
186         bool "Logic for interfacing with Opal     190         bool "Logic for interfacing with Opal enabled SEDs"
187         depends on KEYS                        !! 191         ---help---
188         select PSERIES_PLPKS if PPC_PSERIES    << 
189         select PSERIES_PLPKS_SED if PPC_PSERIE << 
190         help                                   << 
191         Builds Logic for interfacing with Opal    192         Builds Logic for interfacing with Opal enabled controllers.
192         Enabling this option enables users to     193         Enabling this option enables users to setup/unlock/lock
193         Locking ranges for SED devices using t    194         Locking ranges for SED devices using the Opal protocol.
194                                                   195 
195 config BLK_INLINE_ENCRYPTION                   !! 196 menu "Partition Types"
196         bool "Enable inline encryption support << 
197         help                                   << 
198           Build the blk-crypto subsystem. Enab << 
199           block layer handle encryption, so us << 
200           advantage of inline encryption hardw << 
201                                                << 
202 config BLK_INLINE_ENCRYPTION_FALLBACK          << 
203         bool "Enable crypto API fallback for b << 
204         depends on BLK_INLINE_ENCRYPTION       << 
205         select CRYPTO                          << 
206         select CRYPTO_SKCIPHER                 << 
207         help                                   << 
208           Enabling this lets the block layer h << 
209           by falling back to the kernel crypto << 
210           encryption hardware is not present.  << 
211                                                   197 
212 source "block/partitions/Kconfig"                 198 source "block/partitions/Kconfig"
213                                                   199 
214 config BLK_MQ_PCI                              !! 200 endmenu
215         def_bool PCI                           << 
216                                                   201 
217 config BLK_MQ_VIRTIO                           !! 202 endif # BLOCK
                                                   >> 203 
                                                   >> 204 config BLOCK_COMPAT
218         bool                                      205         bool
219         depends on VIRTIO                      !! 206         depends on BLOCK && COMPAT
220         default y                                 207         default y
221                                                   208 
222 config BLK_PM                                  !! 209 config BLK_MQ_PCI
223         def_bool PM                            !! 210         bool
                                                   >> 211         depends on BLOCK && PCI
                                                   >> 212         default y
224                                                   213 
225 # do not use in new code                       !! 214 config BLK_MQ_VIRTIO
226 config BLOCK_HOLDER_DEPRECATED                 << 
227         bool                                      215         bool
                                                   >> 216         depends on BLOCK && VIRTIO
                                                   >> 217         default y
228                                                   218 
229 config BLK_MQ_STACKING                         !! 219 config BLK_MQ_RDMA
230         bool                                      220         bool
                                                   >> 221         depends on BLOCK && INFINIBAND
                                                   >> 222         default y
231                                                   223 
232 source "block/Kconfig.iosched"                 !! 224 config BLK_PM
                                                   >> 225         def_bool BLOCK && PM
233                                                   226 
234 endif # BLOCK                                  !! 227 source block/Kconfig.iosched
                                                      

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