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 if BLOCK
  19
  20 config FS_IOMAP
  21         bool
  22
  23 source "fs/ext2/Kconfig"
  24 source "fs/ext4/Kconfig"
  25 source "fs/jbd2/Kconfig"
  26
  27 config FS_MBCACHE
  28 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
  29         tristate
  30         default y if EXT2_FS=y && EXT2_FS_XATTR
  31         default y if EXT4_FS=y
  32         default m if EXT2_FS_XATTR || EXT4_FS
  33
  34 source "fs/reiserfs/Kconfig"
  35 source "fs/jfs/Kconfig"
  36
  37 source "fs/xfs/Kconfig"
  38 source "fs/gfs2/Kconfig"
  39 source "fs/ocfs2/Kconfig"
  40 source "fs/btrfs/Kconfig"
  41 source "fs/nilfs2/Kconfig"
  42 source "fs/f2fs/Kconfig"
  43 source "fs/zonefs/Kconfig"
  44
  45 config FS_DAX
  46         bool "File system based Direct Access (DAX) support"
  47         depends on MMU
  48         depends on !(ARM || MIPS || SPARC)
  49         select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
  50         select FS_IOMAP
  51         select DAX
  52         help
  53           Direct Access (DAX) can be used on memory-backed block devices.
  54           If the block device supports DAX and the filesystem supports DAX,
  55           then you can avoid using the pagecache to buffer I/Os.  Turning
  56           on this option will compile in support for DAX.
  57
  58           For a DAX device to support file system access it needs to have
  59           struct pages.  For the nfit based NVDIMMs this can be enabled
  60           using the ndctl utility:
  61
  62                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  63                         --mode=fsdax --map=mem
  64
  65           See the 'create-namespace' man page for details on the overhead of
  66           --map=mem:
  67           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  68
  69           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  70           file systems DAX support needs to be manually enabled globally or
  71           per-inode using a mount option as well.  See the file documentation in
  72           Documentation/filesystems/dax.rst for details.
  73
  74           If you do not have a block device that is capable of using this,
  75           or if unsure, say N.  Saying Y will increase the size of the kernel
  76           by about 5kB.
  77
  78 config FS_DAX_PMD
  79         bool
  80         default FS_DAX
  81         depends on FS_DAX
  82         depends on ZONE_DEVICE
  83         depends on TRANSPARENT_HUGEPAGE
  84
  85 # Selected by DAX drivers that do not expect filesystem DAX to support
  86 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  87 # for fork() of processes with MAP_SHARED mappings or support for
  88 # direct-I/O to a DAX mapping.
  89 config FS_DAX_LIMITED
  90         bool
  91
  92 endif # BLOCK
  93
  94 # Posix ACL utility routines
  95 #
  96 # Note: Posix ACLs can be implemented without these helpers.  Never use
  97 # this symbol for ifdefs in core code.
  98 #
  99 config FS_POSIX_ACL
 100         def_bool n
 101
 102 config EXPORTFS
 103         tristate
 104
 105 config EXPORTFS_BLOCK_OPS
 106         bool "Enable filesystem export operations for block IO"
 107         help
 108           This option enables the export operations for a filesystem to support
 109           external block IO.
 110
 111 config FILE_LOCKING
 112         bool "Enable POSIX file locking API" if EXPERT
 113         default y
 114         help
 115           This option enables standard file locking support, required
 116           for filesystems like NFS and for the flock() system
 117           call. Disabling this option saves about 11k.
 118
 119 source "fs/crypto/Kconfig"
 120
 121 source "fs/verity/Kconfig"
 122
 123 source "fs/notify/Kconfig"
 124
 125 source "fs/quota/Kconfig"
 126
 127 source "fs/autofs/Kconfig"
 128 source "fs/fuse/Kconfig"
 129 source "fs/overlayfs/Kconfig"
 130
 131 menu "Caches"
 132
 133 source "fs/netfs/Kconfig"
 134 source "fs/fscache/Kconfig"
 135 source "fs/cachefiles/Kconfig"
 136
 137 endmenu
 138
 139 if BLOCK
 140 menu "CD-ROM/DVD Filesystems"
 141
 142 source "fs/isofs/Kconfig"
 143 source "fs/udf/Kconfig"
 144
 145 endmenu
 146 endif # BLOCK
 147
 148 if BLOCK
 149 menu "DOS/FAT/EXFAT/NT Filesystems"
 150
 151 source "fs/fat/Kconfig"
 152 source "fs/exfat/Kconfig"
 153 source "fs/ntfs/Kconfig"
 154 source "fs/ntfs3/Kconfig"
 155
 156 endmenu
 157 endif # BLOCK
 158
 159 menu "Pseudo filesystems"
 160
 161 source "fs/proc/Kconfig"
 162 source "fs/kernfs/Kconfig"
 163 source "fs/sysfs/Kconfig"
 164
 165 config TMPFS
 166         bool "Tmpfs virtual memory file system support (former shm fs)"
 167         depends on SHMEM
 168         help
 169           Tmpfs is a file system which keeps all files in virtual memory.
 170
 171           Everything in tmpfs is temporary in the sense that no files will be
 172           created on your hard drive. The files live in memory and swap
 173           space. If you unmount a tmpfs instance, everything stored therein is
 174           lost.
 175
 176           See <file:Documentation/filesystems/tmpfs.rst> for details.
 177
 178 config TMPFS_POSIX_ACL
 179         bool "Tmpfs POSIX Access Control Lists"
 180         depends on TMPFS
 181         select TMPFS_XATTR
 182         select FS_POSIX_ACL
 183         help
 184           POSIX Access Control Lists (ACLs) support additional access rights
 185           for users and groups beyond the standard owner/group/world scheme,
 186           and this option selects support for ACLs specifically for tmpfs
 187           filesystems.
 188
 189           If you've selected TMPFS, it's possible that you'll also need
 190           this option as there are a number of Linux distros that require
 191           POSIX ACL support under /dev for certain features to work properly.
 192           For example, some distros need this feature for ALSA-related /dev
 193           files for sound to work properly.  In short, if you're not sure,
 194           say Y.
 195
 196 config TMPFS_XATTR
 197         bool "Tmpfs extended attributes"
 198         depends on TMPFS
 199         default n
 200         help
 201           Extended attributes are name:value pairs associated with inodes by
 202           the kernel or by users (see the attr(5) manual page for details).
 203
 204           Currently this enables support for the trusted.* and
 205           security.* namespaces.
 206
 207           You need this for POSIX ACL support on tmpfs.
 208
 209           If unsure, say N.
 210
 211 config TMPFS_INODE64
 212         bool "Use 64-bit ino_t by default in tmpfs"
 213         depends on TMPFS && 64BIT
 214         default n
 215         help
 216           tmpfs has historically used only inode numbers as wide as an unsigned
 217           int. In some cases this can cause wraparound, potentially resulting
 218           in multiple files with the same inode number on a single device. This
 219           option makes tmpfs use the full width of ino_t by default, without
 220           needing to specify the inode64 option when mounting.
 221
 222           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 223           ancient that opening a file larger than 2GiB fails with EINVAL, then
 224           the INODE64 config option and inode64 mount option risk operations
 225           failing with EOVERFLOW once 33-bit inode numbers are reached.
 226
 227           To override this configured default, use the inode32 or inode64
 228           option when mounting.
 229
 230           If unsure, say N.
 231
 232 config ARCH_SUPPORTS_HUGETLBFS
 233         def_bool n
 234
 235 config HUGETLBFS
 236         bool "HugeTLB file system support"
 237         depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 238         help
 239           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 240           ramfs. For architectures that support it, say Y here and read
 241           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 242
 243           If unsure, say N.
 244
 245 config HUGETLB_PAGE
 246         def_bool HUGETLBFS
 247
 248 config HUGETLB_PAGE_FREE_VMEMMAP
 249         def_bool HUGETLB_PAGE
 250         depends on X86_64
 251         depends on SPARSEMEM_VMEMMAP
 252
 253 config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
 254         bool "Default freeing vmemmap pages of HugeTLB to on"
 255         default n
 256         depends on HUGETLB_PAGE_FREE_VMEMMAP
 257         help
 258           When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
 259           pages associated with each HugeTLB page is default off. Say Y here
 260           to enable freeing vmemmap pages of HugeTLB by default. It can then
 261           be disabled on the command line via hugetlb_free_vmemmap=off.
 262
 263 config MEMFD_CREATE
 264         def_bool TMPFS || HUGETLBFS
 265
 266 config ARCH_HAS_GIGANTIC_PAGE
 267         bool
 268
 269 source "fs/configfs/Kconfig"
 270 source "fs/efivarfs/Kconfig"
 271
 272 endmenu
 273
 274 menuconfig MISC_FILESYSTEMS
 275         bool "Miscellaneous filesystems"
 276         default y
 277         help
 278           Say Y here to get to see options for various miscellaneous
 279           filesystems, such as filesystems that came from other
 280           operating systems.
 281
 282           This option alone does not add any kernel code.
 283
 284           If you say N, all options in this submenu will be skipped and
 285           disabled; if unsure, say Y here.
 286
 287 if MISC_FILESYSTEMS
 288
 289 source "fs/orangefs/Kconfig"
 290 source "fs/adfs/Kconfig"
 291 source "fs/affs/Kconfig"
 292 source "fs/ecryptfs/Kconfig"
 293 source "fs/hfs/Kconfig"
 294 source "fs/hfsplus/Kconfig"
 295 source "fs/befs/Kconfig"
 296 source "fs/bfs/Kconfig"
 297 source "fs/efs/Kconfig"
 298 source "fs/jffs2/Kconfig"
 299 # UBIFS File system configuration
 300 source "fs/ubifs/Kconfig"
 301 source "fs/cramfs/Kconfig"
 302 source "fs/squashfs/Kconfig"
 303 source "fs/freevxfs/Kconfig"
 304 source "fs/minix/Kconfig"
 305 source "fs/omfs/Kconfig"
 306 source "fs/hpfs/Kconfig"
 307 source "fs/qnx4/Kconfig"
 308 source "fs/qnx6/Kconfig"
 309 source "fs/romfs/Kconfig"
 310 source "fs/pstore/Kconfig"
 311 source "fs/sysv/Kconfig"
 312 source "fs/ufs/Kconfig"
 313 source "fs/erofs/Kconfig"
 314 source "fs/vboxsf/Kconfig"
 315
 316 endif # MISC_FILESYSTEMS
 317
 318 menuconfig NETWORK_FILESYSTEMS
 319         bool "Network File Systems"
 320         default y
 321         depends on NET
 322         help
 323           Say Y here to get to see options for network filesystems and
 324           filesystem-related networking code, such as NFS daemon and
 325           RPCSEC security modules.
 326
 327           This option alone does not add any kernel code.
 328
 329           If you say N, all options in this submenu will be skipped and
 330           disabled; if unsure, say Y here.
 331
 332 if NETWORK_FILESYSTEMS
 333
 334 source "fs/nfs/Kconfig"
 335 source "fs/nfsd/Kconfig"
 336
 337 config GRACE_PERIOD
 338         tristate
 339
 340 config LOCKD
 341         tristate
 342         depends on FILE_LOCKING
 343         select GRACE_PERIOD
 344
 345 config LOCKD_V4
 346         bool
 347         depends on NFSD_V3 || NFS_V3
 348         depends on FILE_LOCKING
 349         default y
 350
 351 config NFS_ACL_SUPPORT
 352         tristate
 353         select FS_POSIX_ACL
 354
 355 config NFS_COMMON
 356         bool
 357         depends on NFSD || NFS_FS || LOCKD
 358         default y
 359
 360 config NFS_V4_2_SSC_HELPER
 361         bool
 362         default y if NFS_V4_2
 363
 364 source "net/sunrpc/Kconfig"
 365 source "fs/ceph/Kconfig"
 366
 367 source "fs/cifs/Kconfig"
 368 source "fs/ksmbd/Kconfig"
 369
 370 config SMBFS_COMMON
 371         tristate
 372         default y if CIFS=y
 373         default m if CIFS=m
 374
 375 source "fs/coda/Kconfig"
 376 source "fs/afs/Kconfig"
 377 source "fs/9p/Kconfig"
 378
 379 endif # NETWORK_FILESYSTEMS
 380
 381 source "fs/nls/Kconfig"
 382 source "fs/dlm/Kconfig"
 383 source "fs/unicode/Kconfig"
 384
 385 config IO_WQ
 386         bool
 387
 388 endmenu