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/zonefs/Kconfig"
  52
  53 endif # BLOCK
  54
  55 config FS_DAX
  56         bool "File system based Direct Access (DAX) support"
  57         depends on MMU
  58         depends on !(ARM || MIPS || SPARC)
  59         depends on ZONE_DEVICE || FS_DAX_LIMITED
  60         select FS_IOMAP
  61         select DAX
  62         help
  63           Direct Access (DAX) can be used on memory-backed block devices.
  64           If the block device supports DAX and the filesystem supports DAX,
  65           then you can avoid using the pagecache to buffer I/Os.  Turning
  66           on this option will compile in support for DAX.
  67
  68           For a DAX device to support file system access it needs to have
  69           struct pages.  For the nfit based NVDIMMs this can be enabled
  70           using the ndctl utility:
  71
  72                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  73                         --mode=fsdax --map=mem
  74
  75           See the 'create-namespace' man page for details on the overhead of
  76           --map=mem:
  77           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  78
  79           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  80           file systems DAX support needs to be manually enabled globally or
  81           per-inode using a mount option as well.  See the file documentation in
  82           Documentation/filesystems/dax.rst for details.
  83
  84           If you do not have a block device that is capable of using this,
  85           or if unsure, say N.  Saying Y will increase the size of the kernel
  86           by about 5kB.
  87
  88 config FS_DAX_PMD
  89         bool
  90         default FS_DAX
  91         depends on FS_DAX
  92         depends on ZONE_DEVICE
  93         depends on TRANSPARENT_HUGEPAGE
  94
  95 # Selected by DAX drivers that do not expect filesystem DAX to support
  96 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  97 # for fork() of processes with MAP_SHARED mappings or support for
  98 # direct-I/O to a DAX mapping.
  99 config FS_DAX_LIMITED
 100         bool
 101
 102 # Posix ACL utility routines
 103 #
 104 # Note: Posix ACLs can be implemented without these helpers.  Never use
 105 # this symbol for ifdefs in core code.
 106 #
 107 config FS_POSIX_ACL
 108         def_bool n
 109
 110 config EXPORTFS
 111         tristate
 112
 113 config EXPORTFS_BLOCK_OPS
 114         bool "Enable filesystem export operations for block IO"
 115         help
 116           This option enables the export operations for a filesystem to support
 117           external block IO.
 118
 119 config FILE_LOCKING
 120         bool "Enable POSIX file locking API" if EXPERT
 121         default y
 122         help
 123           This option enables standard file locking support, required
 124           for filesystems like NFS and for the flock() system
 125           call. Disabling this option saves about 11k.
 126
 127 source "fs/crypto/Kconfig"
 128
 129 source "fs/verity/Kconfig"
 130
 131 source "fs/notify/Kconfig"
 132
 133 source "fs/quota/Kconfig"
 134
 135 source "fs/autofs/Kconfig"
 136 source "fs/fuse/Kconfig"
 137 source "fs/overlayfs/Kconfig"
 138
 139 menu "Caches"
 140
 141 source "fs/netfs/Kconfig"
 142 source "fs/fscache/Kconfig"
 143 source "fs/cachefiles/Kconfig"
 144
 145 endmenu
 146
 147 if BLOCK
 148 menu "CD-ROM/DVD Filesystems"
 149
 150 source "fs/isofs/Kconfig"
 151 source "fs/udf/Kconfig"
 152
 153 endmenu
 154 endif # BLOCK
 155
 156 if BLOCK
 157 menu "DOS/FAT/EXFAT/NT Filesystems"
 158
 159 source "fs/fat/Kconfig"
 160 source "fs/exfat/Kconfig"
 161 source "fs/ntfs/Kconfig"
 162 source "fs/ntfs3/Kconfig"
 163
 164 endmenu
 165 endif # BLOCK
 166
 167 menu "Pseudo filesystems"
 168
 169 source "fs/proc/Kconfig"
 170 source "fs/kernfs/Kconfig"
 171 source "fs/sysfs/Kconfig"
 172
 173 config TMPFS
 174         bool "Tmpfs virtual memory file system support (former shm fs)"
 175         depends on SHMEM
 176         select MEMFD_CREATE
 177         help
 178           Tmpfs is a file system which keeps all files in virtual memory.
 179
 180           Everything in tmpfs is temporary in the sense that no files will be
 181           created on your hard drive. The files live in memory and swap
 182           space. If you unmount a tmpfs instance, everything stored therein is
 183           lost.
 184
 185           See <file:Documentation/filesystems/tmpfs.rst> for details.
 186
 187 config TMPFS_POSIX_ACL
 188         bool "Tmpfs POSIX Access Control Lists"
 189         depends on TMPFS
 190         select TMPFS_XATTR
 191         select FS_POSIX_ACL
 192         help
 193           POSIX Access Control Lists (ACLs) support additional access rights
 194           for users and groups beyond the standard owner/group/world scheme,
 195           and this option selects support for ACLs specifically for tmpfs
 196           filesystems.
 197
 198           If you've selected TMPFS, it's possible that you'll also need
 199           this option as there are a number of Linux distros that require
 200           POSIX ACL support under /dev for certain features to work properly.
 201           For example, some distros need this feature for ALSA-related /dev
 202           files for sound to work properly.  In short, if you're not sure,
 203           say Y.
 204
 205 config TMPFS_XATTR
 206         bool "Tmpfs extended attributes"
 207         depends on TMPFS
 208         default n
 209         help
 210           Extended attributes are name:value pairs associated with inodes by
 211           the kernel or by users (see the attr(5) manual page for details).
 212
 213           This enables support for the trusted.*, security.* and user.*
 214           namespaces.
 215
 216           You need this for POSIX ACL support on tmpfs.
 217
 218           If unsure, say N.
 219
 220 config TMPFS_INODE64
 221         bool "Use 64-bit ino_t by default in tmpfs"
 222         depends on TMPFS && 64BIT
 223         default n
 224         help
 225           tmpfs has historically used only inode numbers as wide as an unsigned
 226           int. In some cases this can cause wraparound, potentially resulting
 227           in multiple files with the same inode number on a single device. This
 228           option makes tmpfs use the full width of ino_t by default, without
 229           needing to specify the inode64 option when mounting.
 230
 231           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 232           ancient that opening a file larger than 2GiB fails with EINVAL, then
 233           the INODE64 config option and inode64 mount option risk operations
 234           failing with EOVERFLOW once 33-bit inode numbers are reached.
 235
 236           To override this configured default, use the inode32 or inode64
 237           option when mounting.
 238
 239           If unsure, say N.
 240
 241 config TMPFS_QUOTA
 242         bool "Tmpfs quota support"
 243         depends on TMPFS
 244         select QUOTA
 245         help
 246           Quota support allows to set per user and group limits for tmpfs
 247           usage.  Say Y to enable quota support. Once enabled you can control
 248           user and group quota enforcement with quota, usrquota and grpquota
 249           mount options.
 250
 251           If unsure, say N.
 252
 253 config ARCH_SUPPORTS_HUGETLBFS
 254         def_bool n
 255
 256 config HUGETLBFS
 257         bool "HugeTLB file system support"
 258         depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 259         depends on (SYSFS || SYSCTL)
 260         select MEMFD_CREATE
 261         help
 262           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 263           ramfs. For architectures that support it, say Y here and read
 264           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 265
 266           If unsure, say N.
 267
 268 config HUGETLB_PAGE
 269         def_bool HUGETLBFS
 270
 271 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 272         def_bool HUGETLB_PAGE
 273         depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 274         depends on SPARSEMEM_VMEMMAP
 275
 276 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
 277         bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
 278         default n
 279         depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 280         help
 281           The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
 282           enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
 283           (boot command line) or hugetlb_optimize_vmemmap (sysctl).
 284
 285 config ARCH_HAS_GIGANTIC_PAGE
 286         bool
 287
 288 source "fs/configfs/Kconfig"
 289 source "fs/efivarfs/Kconfig"
 290
 291 endmenu
 292
 293 menuconfig MISC_FILESYSTEMS
 294         bool "Miscellaneous filesystems"
 295         default y
 296         help
 297           Say Y here to get to see options for various miscellaneous
 298           filesystems, such as filesystems that came from other
 299           operating systems.
 300
 301           This option alone does not add any kernel code.
 302
 303           If you say N, all options in this submenu will be skipped and
 304           disabled; if unsure, say Y here.
 305
 306 if MISC_FILESYSTEMS
 307
 308 source "fs/orangefs/Kconfig"
 309 source "fs/adfs/Kconfig"
 310 source "fs/affs/Kconfig"
 311 source "fs/ecryptfs/Kconfig"
 312 source "fs/hfs/Kconfig"
 313 source "fs/hfsplus/Kconfig"
 314 source "fs/befs/Kconfig"
 315 source "fs/bfs/Kconfig"
 316 source "fs/efs/Kconfig"
 317 source "fs/jffs2/Kconfig"
 318 # UBIFS File system configuration
 319 source "fs/ubifs/Kconfig"
 320 source "fs/cramfs/Kconfig"
 321 source "fs/squashfs/Kconfig"
 322 source "fs/freevxfs/Kconfig"
 323 source "fs/minix/Kconfig"
 324 source "fs/omfs/Kconfig"
 325 source "fs/hpfs/Kconfig"
 326 source "fs/qnx4/Kconfig"
 327 source "fs/qnx6/Kconfig"
 328 source "fs/romfs/Kconfig"
 329 source "fs/pstore/Kconfig"
 330 source "fs/sysv/Kconfig"
 331 source "fs/ufs/Kconfig"
 332 source "fs/erofs/Kconfig"
 333 source "fs/vboxsf/Kconfig"
 334
 335 endif # MISC_FILESYSTEMS
 336
 337 menuconfig NETWORK_FILESYSTEMS
 338         bool "Network File Systems"
 339         default y
 340         depends on NET
 341         help
 342           Say Y here to get to see options for network filesystems and
 343           filesystem-related networking code, such as NFS daemon and
 344           RPCSEC security modules.
 345
 346           This option alone does not add any kernel code.
 347
 348           If you say N, all options in this submenu will be skipped and
 349           disabled; if unsure, say Y here.
 350
 351 if NETWORK_FILESYSTEMS
 352
 353 source "fs/nfs/Kconfig"
 354 source "fs/nfsd/Kconfig"
 355
 356 config GRACE_PERIOD
 357         tristate
 358
 359 config LOCKD
 360         tristate
 361         depends on FILE_LOCKING
 362         select GRACE_PERIOD
 363
 364 config LOCKD_V4
 365         bool
 366         depends on NFSD || NFS_V3
 367         depends on FILE_LOCKING
 368         default y
 369
 370 config NFS_ACL_SUPPORT
 371         tristate
 372         select FS_POSIX_ACL
 373
 374 config NFS_COMMON
 375         bool
 376         depends on NFSD || NFS_FS || LOCKD
 377         default y
 378
 379 config NFS_V4_2_SSC_HELPER
 380         bool
 381         default y if NFS_V4_2
 382
 383 source "net/sunrpc/Kconfig"
 384 source "fs/ceph/Kconfig"
 385
 386 source "fs/smb/Kconfig"
 387 source "fs/coda/Kconfig"
 388 source "fs/afs/Kconfig"
 389 source "fs/9p/Kconfig"
 390
 391 endif # NETWORK_FILESYSTEMS
 392
 393 source "fs/nls/Kconfig"
 394 source "fs/dlm/Kconfig"
 395 source "fs/unicode/Kconfig"
 396
 397 config IO_WQ
 398         bool
 399
 400 endmenu