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 # Stackable filesystems
  22 config FS_STACK
  23         bool
  24
  25 config BUFFER_HEAD
  26         bool
  27
  28 # old blockdev_direct_IO implementation.  Use iomap for new code instead
  29 config LEGACY_DIRECT_IO
  30         depends on BUFFER_HEAD
  31         bool
  32
  33 if BLOCK
  34
  35 source "fs/ext2/Kconfig"
  36 source "fs/ext4/Kconfig"
  37 source "fs/jbd2/Kconfig"
  38
  39 config FS_MBCACHE
  40 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
  41         tristate
  42         default y if EXT2_FS=y && EXT2_FS_XATTR
  43         default y if EXT4_FS=y
  44         default m if EXT2_FS_XATTR || EXT4_FS
  45
  46 source "fs/reiserfs/Kconfig"
  47 source "fs/jfs/Kconfig"
  48
  49 source "fs/xfs/Kconfig"
  50 source "fs/gfs2/Kconfig"
  51 source "fs/ocfs2/Kconfig"
  52 source "fs/btrfs/Kconfig"
  53 source "fs/nilfs2/Kconfig"
  54 source "fs/f2fs/Kconfig"
  55 source "fs/bcachefs/Kconfig"
  56 source "fs/zonefs/Kconfig"
  57
  58 endif # BLOCK
  59
  60 config FS_DAX
  61         bool "File system based Direct Access (DAX) support"
  62         depends on MMU
  63         depends on ZONE_DEVICE || FS_DAX_LIMITED
  64         select FS_IOMAP
  65         select DAX
  66         help
  67           Direct Access (DAX) can be used on memory-backed block devices.
  68           If the block device supports DAX and the filesystem supports DAX,
  69           then you can avoid using the pagecache to buffer I/Os.  Turning
  70           on this option will compile in support for DAX.
  71
  72           For a DAX device to support file system access it needs to have
  73           struct pages.  For the nfit based NVDIMMs this can be enabled
  74           using the ndctl utility:
  75
  76                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  77                         --mode=fsdax --map=mem
  78
  79           See the 'create-namespace' man page for details on the overhead of
  80           --map=mem:
  81           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  82
  83           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  84           file systems DAX support needs to be manually enabled globally or
  85           per-inode using a mount option as well.  See the file documentation in
  86           Documentation/filesystems/dax.rst for details.
  87
  88           If you do not have a block device that is capable of using this,
  89           or if unsure, say N.  Saying Y will increase the size of the kernel
  90           by about 5kB.
  91
  92 config FS_DAX_PMD
  93         bool
  94         default FS_DAX
  95         depends on FS_DAX
  96         depends on ZONE_DEVICE
  97         depends on TRANSPARENT_HUGEPAGE
  98
  99 # Selected by DAX drivers that do not expect filesystem DAX to support
 100 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
 101 # for fork() of processes with MAP_SHARED mappings or support for
 102 # direct-I/O to a DAX mapping.
 103 config FS_DAX_LIMITED
 104         bool
 105
 106 # Posix ACL utility routines
 107 #
 108 # Note: Posix ACLs can be implemented without these helpers.  Never use
 109 # this symbol for ifdefs in core code.
 110 #
 111 config FS_POSIX_ACL
 112         def_bool n
 113
 114 config EXPORTFS
 115         tristate
 116
 117 config EXPORTFS_BLOCK_OPS
 118         bool "Enable filesystem export operations for block IO"
 119         help
 120           This option enables the export operations for a filesystem to support
 121           external block IO.
 122
 123 config FILE_LOCKING
 124         bool "Enable POSIX file locking API" if EXPERT
 125         default y
 126         help
 127           This option enables standard file locking support, required
 128           for filesystems like NFS and for the flock() system
 129           call. Disabling this option saves about 11k.
 130
 131 source "fs/crypto/Kconfig"
 132
 133 source "fs/verity/Kconfig"
 134
 135 source "fs/notify/Kconfig"
 136
 137 source "fs/quota/Kconfig"
 138
 139 source "fs/autofs/Kconfig"
 140 source "fs/fuse/Kconfig"
 141 source "fs/overlayfs/Kconfig"
 142
 143 menu "Caches"
 144
 145 source "fs/netfs/Kconfig"
 146 source "fs/cachefiles/Kconfig"
 147
 148 endmenu
 149
 150 if BLOCK
 151 menu "CD-ROM/DVD Filesystems"
 152
 153 source "fs/isofs/Kconfig"
 154 source "fs/udf/Kconfig"
 155
 156 endmenu
 157 endif # BLOCK
 158
 159 if BLOCK
 160 menu "DOS/FAT/EXFAT/NT Filesystems"
 161
 162 source "fs/fat/Kconfig"
 163 source "fs/exfat/Kconfig"
 164 source "fs/ntfs3/Kconfig"
 165
 166 endmenu
 167 endif # BLOCK
 168
 169 menu "Pseudo filesystems"
 170
 171 source "fs/proc/Kconfig"
 172 source "fs/kernfs/Kconfig"
 173 source "fs/sysfs/Kconfig"
 174
 175 config TMPFS
 176         bool "Tmpfs virtual memory file system support (former shm fs)"
 177         depends on SHMEM
 178         select MEMFD_CREATE
 179         help
 180           Tmpfs is a file system which keeps all files in virtual memory.
 181
 182           Everything in tmpfs is temporary in the sense that no files will be
 183           created on your hard drive. The files live in memory and swap
 184           space. If you unmount a tmpfs instance, everything stored therein is
 185           lost.
 186
 187           See <file:Documentation/filesystems/tmpfs.rst> for details.
 188
 189 config TMPFS_POSIX_ACL
 190         bool "Tmpfs POSIX Access Control Lists"
 191         depends on TMPFS
 192         select TMPFS_XATTR
 193         select FS_POSIX_ACL
 194         help
 195           POSIX Access Control Lists (ACLs) support additional access rights
 196           for users and groups beyond the standard owner/group/world scheme,
 197           and this option selects support for ACLs specifically for tmpfs
 198           filesystems.
 199
 200           If you've selected TMPFS, it's possible that you'll also need
 201           this option as there are a number of Linux distros that require
 202           POSIX ACL support under /dev for certain features to work properly.
 203           For example, some distros need this feature for ALSA-related /dev
 204           files for sound to work properly.  In short, if you're not sure,
 205           say Y.
 206
 207 config TMPFS_XATTR
 208         bool "Tmpfs extended attributes"
 209         depends on TMPFS
 210         default n
 211         help
 212           Extended attributes are name:value pairs associated with inodes by
 213           the kernel or by users (see the attr(5) manual page for details).
 214
 215           This enables support for the trusted.*, security.* and user.*
 216           namespaces.
 217
 218           You need this for POSIX ACL support on tmpfs.
 219
 220           If unsure, say N.
 221
 222 config TMPFS_INODE64
 223         bool "Use 64-bit ino_t by default in tmpfs"
 224         depends on TMPFS && 64BIT
 225         default n
 226         help
 227           tmpfs has historically used only inode numbers as wide as an unsigned
 228           int. In some cases this can cause wraparound, potentially resulting
 229           in multiple files with the same inode number on a single device. This
 230           option makes tmpfs use the full width of ino_t by default, without
 231           needing to specify the inode64 option when mounting.
 232
 233           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 234           ancient that opening a file larger than 2GiB fails with EINVAL, then
 235           the INODE64 config option and inode64 mount option risk operations
 236           failing with EOVERFLOW once 33-bit inode numbers are reached.
 237
 238           To override this configured default, use the inode32 or inode64
 239           option when mounting.
 240
 241           If unsure, say N.
 242
 243 config TMPFS_QUOTA
 244         bool "Tmpfs quota support"
 245         depends on TMPFS
 246         select QUOTA
 247         help
 248           Quota support allows to set per user and group limits for tmpfs
 249           usage.  Say Y to enable quota support. Once enabled you can control
 250           user and group quota enforcement with quota, usrquota and grpquota
 251           mount options.
 252
 253           If unsure, say N.
 254
 255 config ARCH_SUPPORTS_HUGETLBFS
 256         def_bool n
 257
 258 menuconfig HUGETLBFS
 259         bool "HugeTLB file system support"
 260         depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 261         depends on (SYSFS || SYSCTL)
 262         select MEMFD_CREATE
 263         select PADATA if SMP
 264         help
 265           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 266           ramfs. For architectures that support it, say Y here and read
 267           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 268
 269           If unsure, say N.
 270
 271 if HUGETLBFS
 272 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
 273         bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
 274         default n
 275         depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 276         help
 277           The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to
 278           enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
 279           (boot command line) or hugetlb_optimize_vmemmap (sysctl).
 280 endif # HUGETLBFS
 281
 282 config HUGETLB_PAGE
 283         def_bool HUGETLBFS
 284         select XARRAY_MULTI
 285
 286 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 287         def_bool HUGETLB_PAGE
 288         depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 289         depends on SPARSEMEM_VMEMMAP
 290
 291 config ARCH_HAS_GIGANTIC_PAGE
 292         bool
 293
 294 source "fs/configfs/Kconfig"
 295 source "fs/efivarfs/Kconfig"
 296
 297 endmenu
 298
 299 menuconfig MISC_FILESYSTEMS
 300         bool "Miscellaneous filesystems"
 301         default y
 302         help
 303           Say Y here to get to see options for various miscellaneous
 304           filesystems, such as filesystems that came from other
 305           operating systems.
 306
 307           This option alone does not add any kernel code.
 308
 309           If you say N, all options in this submenu will be skipped and
 310           disabled; if unsure, say Y here.
 311
 312 if MISC_FILESYSTEMS
 313
 314 source "fs/orangefs/Kconfig"
 315 source "fs/adfs/Kconfig"
 316 source "fs/affs/Kconfig"
 317 source "fs/ecryptfs/Kconfig"
 318 source "fs/hfs/Kconfig"
 319 source "fs/hfsplus/Kconfig"
 320 source "fs/befs/Kconfig"
 321 source "fs/bfs/Kconfig"
 322 source "fs/efs/Kconfig"
 323 source "fs/jffs2/Kconfig"
 324 # UBIFS File system configuration
 325 source "fs/ubifs/Kconfig"
 326 source "fs/cramfs/Kconfig"
 327 source "fs/squashfs/Kconfig"
 328 source "fs/freevxfs/Kconfig"
 329 source "fs/minix/Kconfig"
 330 source "fs/omfs/Kconfig"
 331 source "fs/hpfs/Kconfig"
 332 source "fs/qnx4/Kconfig"
 333 source "fs/qnx6/Kconfig"
 334 source "fs/romfs/Kconfig"
 335 source "fs/pstore/Kconfig"
 336 source "fs/sysv/Kconfig"
 337 source "fs/ufs/Kconfig"
 338 source "fs/erofs/Kconfig"
 339 source "fs/vboxsf/Kconfig"
 340
 341 endif # MISC_FILESYSTEMS
 342
 343 menuconfig NETWORK_FILESYSTEMS
 344         bool "Network File Systems"
 345         default y
 346         depends on NET
 347         help
 348           Say Y here to get to see options for network filesystems and
 349           filesystem-related networking code, such as NFS daemon and
 350           RPCSEC security modules.
 351
 352           This option alone does not add any kernel code.
 353
 354           If you say N, all options in this submenu will be skipped and
 355           disabled; if unsure, say Y here.
 356
 357 if NETWORK_FILESYSTEMS
 358
 359 source "fs/nfs/Kconfig"
 360 source "fs/nfsd/Kconfig"
 361
 362 config GRACE_PERIOD
 363         tristate
 364
 365 config LOCKD
 366         tristate
 367         depends on FILE_LOCKING
 368         select GRACE_PERIOD
 369
 370 config LOCKD_V4
 371         bool
 372         depends on NFSD || NFS_V3
 373         depends on FILE_LOCKING
 374         default y
 375
 376 config NFS_ACL_SUPPORT
 377         tristate
 378         select FS_POSIX_ACL
 379
 380 config NFS_COMMON
 381         bool
 382         depends on NFSD || NFS_FS || LOCKD
 383         default y
 384
 385 config NFS_V4_2_SSC_HELPER
 386         bool
 387         default y if NFS_V4_2
 388
 389 source "net/sunrpc/Kconfig"
 390 source "fs/ceph/Kconfig"
 391
 392 source "fs/smb/Kconfig"
 393 source "fs/coda/Kconfig"
 394 source "fs/afs/Kconfig"
 395 source "fs/9p/Kconfig"
 396
 397 endif # NETWORK_FILESYSTEMS
 398
 399 source "fs/nls/Kconfig"
 400 source "fs/dlm/Kconfig"
 401 source "fs/unicode/Kconfig"
 402
 403 config IO_WQ
 404         bool
 405
 406 endmenu