fs/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # File system configuration
   4 #
   5
   6 menu "File systems"
   7
   8 # Use unaligned word dcache accesses
   9 config DCACHE_WORD_ACCESS
  10        bool
  11
  12 config VALIDATE_FS_PARSER
  13         bool "Validate filesystem parameter description"
  14         help
  15           Enable this to perform validation of the parameter description for a
  16           filesystem when it is registered.
  17
  18 config FS_IOMAP
  19         bool
  20
  21 config BUFFER_HEAD
  22         bool
  23
  24 # old blockdev_direct_IO implementation.  Use iomap for new code instead
  25 config LEGACY_DIRECT_IO
  26         depends on BUFFER_HEAD
  27         bool
  28
  29 if BLOCK
  30
  31 source "fs/ext2/Kconfig"
  32 source "fs/ext4/Kconfig"
  33 source "fs/jbd2/Kconfig"
  34
  35 config FS_MBCACHE
  36 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
  37         tristate
  38         default y if EXT2_FS=y && EXT2_FS_XATTR
  39         default y if EXT4_FS=y
  40         default m if EXT2_FS_XATTR || EXT4_FS
  41
  42 source "fs/reiserfs/Kconfig"
  43 source "fs/jfs/Kconfig"
  44
  45 source "fs/xfs/Kconfig"
  46 source "fs/gfs2/Kconfig"
  47 source "fs/ocfs2/Kconfig"
  48 source "fs/btrfs/Kconfig"
  49 source "fs/nilfs2/Kconfig"
  50 source "fs/f2fs/Kconfig"
  51 source "fs/bcachefs/Kconfig"
  52 source "fs/zonefs/Kconfig"
  53
  54 endif # BLOCK
  55
  56 config FS_DAX
  57         bool "File system based Direct Access (DAX) support"
  58         depends on MMU
  59         depends on !(ARM || MIPS || SPARC)
  60         depends on ZONE_DEVICE || FS_DAX_LIMITED
  61         select FS_IOMAP
  62         select DAX
  63         help
  64           Direct Access (DAX) can be used on memory-backed block devices.
  65           If the block device supports DAX and the filesystem supports DAX,
  66           then you can avoid using the pagecache to buffer I/Os.  Turning
  67           on this option will compile in support for DAX.
  68
  69           For a DAX device to support file system access it needs to have
  70           struct pages.  For the nfit based NVDIMMs this can be enabled
  71           using the ndctl utility:
  72
  73                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  74                         --mode=fsdax --map=mem
  75
  76           See the 'create-namespace' man page for details on the overhead of
  77           --map=mem:
  78           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  79
  80           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  81           file systems DAX support needs to be manually enabled globally or
  82           per-inode using a mount option as well.  See the file documentation in
  83           Documentation/filesystems/dax.rst for details.
  84
  85           If you do not have a block device that is capable of using this,
  86           or if unsure, say N.  Saying Y will increase the size of the kernel
  87           by about 5kB.
  88
  89 config FS_DAX_PMD
  90         bool
  91         default FS_DAX
  92         depends on FS_DAX
  93         depends on ZONE_DEVICE
  94         depends on TRANSPARENT_HUGEPAGE
  95
  96 # Selected by DAX drivers that do not expect filesystem DAX to support
  97 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  98 # for fork() of processes with MAP_SHARED mappings or support for
  99 # direct-I/O to a DAX mapping.
 100 config FS_DAX_LIMITED
 101         bool
 102
 103 # Posix ACL utility routines
 104 #
 105 # Note: Posix ACLs can be implemented without these helpers.  Never use
 106 # this symbol for ifdefs in core code.
 107 #
 108 config FS_POSIX_ACL
 109         def_bool n
 110
 111 config EXPORTFS
 112         tristate
 113
 114 config EXPORTFS_BLOCK_OPS
 115         bool "Enable filesystem export operations for block IO"
 116         help
 117           This option enables the export operations for a filesystem to support
 118           external block IO.
 119
 120 config FILE_LOCKING
 121         bool "Enable POSIX file locking API" if EXPERT
 122         default y
 123         help
 124           This option enables standard file locking support, required
 125           for filesystems like NFS and for the flock() system
 126           call. Disabling this option saves about 11k.
 127
 128 source "fs/crypto/Kconfig"
 129
 130 source "fs/verity/Kconfig"
 131
 132 source "fs/notify/Kconfig"
 133
 134 source "fs/quota/Kconfig"
 135
 136 source "fs/autofs/Kconfig"
 137 source "fs/fuse/Kconfig"
 138 source "fs/overlayfs/Kconfig"
 139
 140 menu "Caches"
 141
 142 source "fs/netfs/Kconfig"
 143 source "fs/fscache/Kconfig"
 144 source "fs/cachefiles/Kconfig"
 145
 146 endmenu
 147
 148 if BLOCK
 149 menu "CD-ROM/DVD Filesystems"
 150
 151 source "fs/isofs/Kconfig"
 152 source "fs/udf/Kconfig"
 153
 154 endmenu
 155 endif # BLOCK
 156
 157 if BLOCK
 158 menu "DOS/FAT/EXFAT/NT Filesystems"
 159
 160 source "fs/fat/Kconfig"
 161 source "fs/exfat/Kconfig"
 162 source "fs/ntfs/Kconfig"
 163 source "fs/ntfs3/Kconfig"
 164
 165 endmenu
 166 endif # BLOCK
 167
 168 menu "Pseudo filesystems"
 169
 170 source "fs/proc/Kconfig"
 171 source "fs/kernfs/Kconfig"
 172 source "fs/sysfs/Kconfig"
 173
 174 config TMPFS
 175         bool "Tmpfs virtual memory file system support (former shm fs)"
 176         depends on SHMEM
 177         select MEMFD_CREATE
 178         help
 179           Tmpfs is a file system which keeps all files in virtual memory.
 180
 181           Everything in tmpfs is temporary in the sense that no files will be
 182           created on your hard drive. The files live in memory and swap
 183           space. If you unmount a tmpfs instance, everything stored therein is
 184           lost.
 185
 186           See <file:Documentation/filesystems/tmpfs.rst> for details.
 187
 188 config TMPFS_POSIX_ACL
 189         bool "Tmpfs POSIX Access Control Lists"
 190         depends on TMPFS
 191         select TMPFS_XATTR
 192         select FS_POSIX_ACL
 193         help
 194           POSIX Access Control Lists (ACLs) support additional access rights
 195           for users and groups beyond the standard owner/group/world scheme,
 196           and this option selects support for ACLs specifically for tmpfs
 197           filesystems.
 198
 199           If you've selected TMPFS, it's possible that you'll also need
 200           this option as there are a number of Linux distros that require
 201           POSIX ACL support under /dev for certain features to work properly.
 202           For example, some distros need this feature for ALSA-related /dev
 203           files for sound to work properly.  In short, if you're not sure,
 204           say Y.
 205
 206 config TMPFS_XATTR
 207         bool "Tmpfs extended attributes"
 208         depends on TMPFS
 209         default n
 210         help
 211           Extended attributes are name:value pairs associated with inodes by
 212           the kernel or by users (see the attr(5) manual page for details).
 213
 214           This enables support for the trusted.*, security.* and user.*
 215           namespaces.
 216
 217           You need this for POSIX ACL support on tmpfs.
 218
 219           If unsure, say N.
 220
 221 config TMPFS_INODE64
 222         bool "Use 64-bit ino_t by default in tmpfs"
 223         depends on TMPFS && 64BIT
 224         default n
 225         help
 226           tmpfs has historically used only inode numbers as wide as an unsigned
 227           int. In some cases this can cause wraparound, potentially resulting
 228           in multiple files with the same inode number on a single device. This
 229           option makes tmpfs use the full width of ino_t by default, without
 230           needing to specify the inode64 option when mounting.
 231
 232           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 233           ancient that opening a file larger than 2GiB fails with EINVAL, then
 234           the INODE64 config option and inode64 mount option risk operations
 235           failing with EOVERFLOW once 33-bit inode numbers are reached.
 236
 237           To override this configured default, use the inode32 or inode64
 238           option when mounting.
 239
 240           If unsure, say N.
 241
 242 config TMPFS_QUOTA
 243         bool "Tmpfs quota support"
 244         depends on TMPFS
 245         select QUOTA
 246         help
 247           Quota support allows to set per user and group limits for tmpfs
 248           usage.  Say Y to enable quota support. Once enabled you can control
 249           user and group quota enforcement with quota, usrquota and grpquota
 250           mount options.
 251
 252           If unsure, say N.
 253
 254 config ARCH_SUPPORTS_HUGETLBFS
 255         def_bool n
 256
 257 config HUGETLBFS
 258         bool "HugeTLB file system support"
 259         depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 260         depends on (SYSFS || SYSCTL)
 261         select MEMFD_CREATE
 262         help
 263           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 264           ramfs. For architectures that support it, say Y here and read
 265           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 266
 267           If unsure, say N.
 268
 269 config HUGETLB_PAGE
 270         def_bool HUGETLBFS
 271         select XARRAY_MULTI
 272
 273 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 274         def_bool HUGETLB_PAGE
 275         depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 276         depends on SPARSEMEM_VMEMMAP
 277
 278 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
 279         bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
 280         default n
 281         depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 282         help
 283           The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
 284           enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
 285           (boot command line) or hugetlb_optimize_vmemmap (sysctl).
 286
 287 config ARCH_HAS_GIGANTIC_PAGE
 288         bool
 289
 290 source "fs/configfs/Kconfig"
 291 source "fs/efivarfs/Kconfig"
 292
 293 endmenu
 294
 295 menuconfig MISC_FILESYSTEMS
 296         bool "Miscellaneous filesystems"
 297         default y
 298         help
 299           Say Y here to get to see options for various miscellaneous
 300           filesystems, such as filesystems that came from other
 301           operating systems.
 302
 303           This option alone does not add any kernel code.
 304
 305           If you say N, all options in this submenu will be skipped and
 306           disabled; if unsure, say Y here.
 307
 308 if MISC_FILESYSTEMS
 309
 310 source "fs/orangefs/Kconfig"
 311 source "fs/adfs/Kconfig"
 312 source "fs/affs/Kconfig"
 313 source "fs/ecryptfs/Kconfig"
 314 source "fs/hfs/Kconfig"
 315 source "fs/hfsplus/Kconfig"
 316 source "fs/befs/Kconfig"
 317 source "fs/bfs/Kconfig"
 318 source "fs/efs/Kconfig"
 319 source "fs/jffs2/Kconfig"
 320 # UBIFS File system configuration
 321 source "fs/ubifs/Kconfig"
 322 source "fs/cramfs/Kconfig"
 323 source "fs/squashfs/Kconfig"
 324 source "fs/freevxfs/Kconfig"
 325 source "fs/minix/Kconfig"
 326 source "fs/omfs/Kconfig"
 327 source "fs/hpfs/Kconfig"
 328 source "fs/qnx4/Kconfig"
 329 source "fs/qnx6/Kconfig"
 330 source "fs/romfs/Kconfig"
 331 source "fs/pstore/Kconfig"
 332 source "fs/sysv/Kconfig"
 333 source "fs/ufs/Kconfig"
 334 source "fs/erofs/Kconfig"
 335 source "fs/vboxsf/Kconfig"
 336
 337 endif # MISC_FILESYSTEMS
 338
 339 menuconfig NETWORK_FILESYSTEMS
 340         bool "Network File Systems"
 341         default y
 342         depends on NET
 343         help
 344           Say Y here to get to see options for network filesystems and
 345           filesystem-related networking code, such as NFS daemon and
 346           RPCSEC security modules.
 347
 348           This option alone does not add any kernel code.
 349
 350           If you say N, all options in this submenu will be skipped and
 351           disabled; if unsure, say Y here.
 352
 353 if NETWORK_FILESYSTEMS
 354
 355 source "fs/nfs/Kconfig"
 356 source "fs/nfsd/Kconfig"
 357
 358 config GRACE_PERIOD
 359         tristate
 360
 361 config LOCKD
 362         tristate
 363         depends on FILE_LOCKING
 364         select GRACE_PERIOD
 365
 366 config LOCKD_V4
 367         bool
 368         depends on NFSD || NFS_V3
 369         depends on FILE_LOCKING
 370         default y
 371
 372 config NFS_ACL_SUPPORT
 373         tristate
 374         select FS_POSIX_ACL
 375
 376 config NFS_COMMON
 377         bool
 378         depends on NFSD || NFS_FS || LOCKD
 379         default y
 380
 381 config NFS_V4_2_SSC_HELPER
 382         bool
 383         default y if NFS_V4_2
 384
 385 source "net/sunrpc/Kconfig"
 386 source "fs/ceph/Kconfig"
 387
 388 source "fs/smb/Kconfig"
 389 source "fs/coda/Kconfig"
 390 source "fs/afs/Kconfig"
 391 source "fs/9p/Kconfig"
 392
 393 endif # NETWORK_FILESYSTEMS
 394
 395 source "fs/nls/Kconfig"
 396 source "fs/dlm/Kconfig"
 397 source "fs/unicode/Kconfig"
 398
 399 config IO_WQ
 400         bool
 401
 402 endmenu