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 "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; you will need to
  57           mount the filesystem using the -o dax option.
  58
  59           If you do not have a block device that is capable of using this,
  60           or if unsure, say N.  Saying Y will increase the size of the kernel
  61           by about 5kB.
  62
  63 config FS_DAX_PMD
  64         bool
  65         default FS_DAX
  66         depends on FS_DAX
  67         depends on ZONE_DEVICE
  68         depends on TRANSPARENT_HUGEPAGE
  69
  70 # Selected by DAX drivers that do not expect filesystem DAX to support
  71 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  72 # for fork() of processes with MAP_SHARED mappings or support for
  73 # direct-I/O to a DAX mapping.
  74 config FS_DAX_LIMITED
  75         bool
  76
  77 endif # BLOCK
  78
  79 # Posix ACL utility routines
  80 #
  81 # Note: Posix ACLs can be implemented without these helpers.  Never use
  82 # this symbol for ifdefs in core code.
  83 #
  84 config FS_POSIX_ACL
  85         def_bool n
  86
  87 config EXPORTFS
  88         tristate
  89
  90 config EXPORTFS_BLOCK_OPS
  91         bool "Enable filesystem export operations for block IO"
  92         help
  93           This option enables the export operations for a filesystem to support
  94           external block IO.
  95
  96 config FILE_LOCKING
  97         bool "Enable POSIX file locking API" if EXPERT
  98         default y
  99         help
 100           This option enables standard file locking support, required
 101           for filesystems like NFS and for the flock() system
 102           call. Disabling this option saves about 11k.
 103
 104 config MANDATORY_FILE_LOCKING
 105         bool "Enable Mandatory file locking"
 106         depends on FILE_LOCKING
 107         default y
 108         help
 109           This option enables files appropriately marked files on appropriely
 110           mounted filesystems to support mandatory locking.
 111
 112           To the best of my knowledge this is dead code that no one cares about.
 113
 114 source "fs/crypto/Kconfig"
 115
 116 source "fs/verity/Kconfig"
 117
 118 source "fs/notify/Kconfig"
 119
 120 source "fs/quota/Kconfig"
 121
 122 source "fs/autofs/Kconfig"
 123 source "fs/fuse/Kconfig"
 124 source "fs/overlayfs/Kconfig"
 125
 126 config SHIFT_FS
 127         tristate "UID/GID shifting overlay filesystem for containers"
 128         help
 129           This filesystem can overlay any mounted filesystem and shift
 130           the uid/gid the files appear at.  The idea is that
 131           unprivileged containers can use this to mount root volumes
 132           using this technique.
 133
 134 config SHIFT_FS_POSIX_ACL
 135         bool "shiftfs POSIX Access Control Lists"
 136         depends on SHIFT_FS
 137         select FS_POSIX_ACL
 138         help
 139           POSIX Access Control Lists (ACLs) support permissions for users and
 140           groups beyond the owner/group/world scheme.
 141
 142           If you don't know what Access Control Lists are, say N.
 143
 144 menu "Caches"
 145
 146 source "fs/fscache/Kconfig"
 147 source "fs/cachefiles/Kconfig"
 148
 149 endmenu
 150
 151 if BLOCK
 152 menu "CD-ROM/DVD Filesystems"
 153
 154 source "fs/isofs/Kconfig"
 155 source "fs/udf/Kconfig"
 156
 157 endmenu
 158 endif # BLOCK
 159
 160 if BLOCK
 161 menu "DOS/FAT/EXFAT/NT Filesystems"
 162
 163 source "fs/fat/Kconfig"
 164 source "fs/exfat/Kconfig"
 165 source "fs/ntfs/Kconfig"
 166
 167 endmenu
 168 endif # BLOCK
 169
 170 menu "Pseudo filesystems"
 171
 172 source "fs/proc/Kconfig"
 173 source "fs/kernfs/Kconfig"
 174 source "fs/sysfs/Kconfig"
 175
 176 config TMPFS
 177         bool "Tmpfs virtual memory file system support (former shm fs)"
 178         depends on SHMEM
 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           Currently this enables support for the trusted.* and
 216           security.* 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 && !(S390 || ALPHA)
 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 HUGETLBFS
 244         bool "HugeTLB file system support"
 245         depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
 246                    SYS_SUPPORTS_HUGETLBFS || BROKEN
 247         help
 248           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 249           ramfs. For architectures that support it, say Y here and read
 250           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 251
 252           If unsure, say N.
 253
 254 config HUGETLB_PAGE
 255         def_bool HUGETLBFS
 256
 257 config MEMFD_CREATE
 258         def_bool TMPFS || HUGETLBFS
 259
 260 config ARCH_HAS_GIGANTIC_PAGE
 261         bool
 262
 263 source "fs/configfs/Kconfig"
 264 source "fs/efivarfs/Kconfig"
 265
 266 endmenu
 267
 268 menuconfig MISC_FILESYSTEMS
 269         bool "Miscellaneous filesystems"
 270         default y
 271         help
 272           Say Y here to get to see options for various miscellaneous
 273           filesystems, such as filesystems that came from other
 274           operating systems.
 275
 276           This option alone does not add any kernel code.
 277
 278           If you say N, all options in this submenu will be skipped and
 279           disabled; if unsure, say Y here.
 280
 281 if MISC_FILESYSTEMS
 282
 283 source "fs/orangefs/Kconfig"
 284 source "fs/adfs/Kconfig"
 285 source "fs/affs/Kconfig"
 286 source "fs/ecryptfs/Kconfig"
 287 source "fs/hfs/Kconfig"
 288 source "fs/hfsplus/Kconfig"
 289 source "fs/befs/Kconfig"
 290 source "fs/bfs/Kconfig"
 291 source "fs/efs/Kconfig"
 292 source "fs/jffs2/Kconfig"
 293 # UBIFS File system configuration
 294 source "fs/ubifs/Kconfig"
 295 source "fs/cramfs/Kconfig"
 296 source "fs/squashfs/Kconfig"
 297 source "fs/freevxfs/Kconfig"
 298 source "fs/minix/Kconfig"
 299 source "fs/omfs/Kconfig"
 300 source "fs/hpfs/Kconfig"
 301 source "fs/qnx4/Kconfig"
 302 source "fs/qnx6/Kconfig"
 303 source "fs/romfs/Kconfig"
 304 source "fs/pstore/Kconfig"
 305 source "fs/sysv/Kconfig"
 306 source "fs/ufs/Kconfig"
 307 source "fs/erofs/Kconfig"
 308 source "fs/vboxsf/Kconfig"
 309 source "fs/aufs/Kconfig"
 310
 311 endif # MISC_FILESYSTEMS
 312
 313 menuconfig NETWORK_FILESYSTEMS
 314         bool "Network File Systems"
 315         default y
 316         depends on NET
 317         help
 318           Say Y here to get to see options for network filesystems and
 319           filesystem-related networking code, such as NFS daemon and
 320           RPCSEC security modules.
 321
 322           This option alone does not add any kernel code.
 323
 324           If you say N, all options in this submenu will be skipped and
 325           disabled; if unsure, say Y here.
 326
 327 if NETWORK_FILESYSTEMS
 328
 329 source "fs/nfs/Kconfig"
 330 source "fs/nfsd/Kconfig"
 331
 332 config GRACE_PERIOD
 333         tristate
 334
 335 config LOCKD
 336         tristate
 337         depends on FILE_LOCKING
 338         select GRACE_PERIOD
 339
 340 config LOCKD_V4
 341         bool
 342         depends on NFSD_V3 || NFS_V3
 343         depends on FILE_LOCKING
 344         default y
 345
 346 config NFS_ACL_SUPPORT
 347         tristate
 348         select FS_POSIX_ACL
 349
 350 config NFS_COMMON
 351         bool
 352         depends on NFSD || NFS_FS || LOCKD
 353         default y
 354
 355 source "net/sunrpc/Kconfig"
 356 source "fs/ceph/Kconfig"
 357 source "fs/cifs/Kconfig"
 358 source "fs/coda/Kconfig"
 359 source "fs/afs/Kconfig"
 360 source "fs/9p/Kconfig"
 361
 362 endif # NETWORK_FILESYSTEMS
 363
 364 source "fs/nls/Kconfig"
 365 source "fs/dlm/Kconfig"
 366 source "fs/unicode/Kconfig"
 367
 368 config IO_WQ
 369         bool
 370
 371 endmenu