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/netfs/Kconfig"
 147 source "fs/fscache/Kconfig"
 148 source "fs/cachefiles/Kconfig"
 149
 150 endmenu
 151
 152 if BLOCK
 153 menu "CD-ROM/DVD Filesystems"
 154
 155 source "fs/isofs/Kconfig"
 156 source "fs/udf/Kconfig"
 157
 158 endmenu
 159 endif # BLOCK
 160
 161 if BLOCK
 162 menu "DOS/FAT/EXFAT/NT Filesystems"
 163
 164 source "fs/fat/Kconfig"
 165 source "fs/exfat/Kconfig"
 166 source "fs/ntfs/Kconfig"
 167
 168 endmenu
 169 endif # BLOCK
 170
 171 menu "Pseudo filesystems"
 172
 173 source "fs/proc/Kconfig"
 174 source "fs/kernfs/Kconfig"
 175 source "fs/sysfs/Kconfig"
 176
 177 config TMPFS
 178         bool "Tmpfs virtual memory file system support (former shm fs)"
 179         depends on SHMEM
 180         help
 181           Tmpfs is a file system which keeps all files in virtual memory.
 182
 183           Everything in tmpfs is temporary in the sense that no files will be
 184           created on your hard drive. The files live in memory and swap
 185           space. If you unmount a tmpfs instance, everything stored therein is
 186           lost.
 187
 188           See <file:Documentation/filesystems/tmpfs.rst> for details.
 189
 190 config TMPFS_POSIX_ACL
 191         bool "Tmpfs POSIX Access Control Lists"
 192         depends on TMPFS
 193         select TMPFS_XATTR
 194         select FS_POSIX_ACL
 195         help
 196           POSIX Access Control Lists (ACLs) support additional access rights
 197           for users and groups beyond the standard owner/group/world scheme,
 198           and this option selects support for ACLs specifically for tmpfs
 199           filesystems.
 200
 201           If you've selected TMPFS, it's possible that you'll also need
 202           this option as there are a number of Linux distros that require
 203           POSIX ACL support under /dev for certain features to work properly.
 204           For example, some distros need this feature for ALSA-related /dev
 205           files for sound to work properly.  In short, if you're not sure,
 206           say Y.
 207
 208 config TMPFS_XATTR
 209         bool "Tmpfs extended attributes"
 210         depends on TMPFS
 211         default n
 212         help
 213           Extended attributes are name:value pairs associated with inodes by
 214           the kernel or by users (see the attr(5) manual page for details).
 215
 216           Currently this enables support for the trusted.* and
 217           security.* namespaces.
 218
 219           You need this for POSIX ACL support on tmpfs.
 220
 221           If unsure, say N.
 222
 223 config TMPFS_INODE64
 224         bool "Use 64-bit ino_t by default in tmpfs"
 225         depends on TMPFS && 64BIT
 226         default n
 227         help
 228           tmpfs has historically used only inode numbers as wide as an unsigned
 229           int. In some cases this can cause wraparound, potentially resulting
 230           in multiple files with the same inode number on a single device. This
 231           option makes tmpfs use the full width of ino_t by default, without
 232           needing to specify the inode64 option when mounting.
 233
 234           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 235           ancient that opening a file larger than 2GiB fails with EINVAL, then
 236           the INODE64 config option and inode64 mount option risk operations
 237           failing with EOVERFLOW once 33-bit inode numbers are reached.
 238
 239           To override this configured default, use the inode32 or inode64
 240           option when mounting.
 241
 242           If unsure, say N.
 243
 244 config ARCH_SUPPORTS_HUGETLBFS
 245         def_bool n
 246
 247 config HUGETLBFS
 248         bool "HugeTLB file system support"
 249         depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
 250                    ARCH_SUPPORTS_HUGETLBFS || BROKEN
 251         help
 252           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 253           ramfs. For architectures that support it, say Y here and read
 254           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 255
 256           If unsure, say N.
 257
 258 config HUGETLB_PAGE
 259         def_bool HUGETLBFS
 260
 261 config MEMFD_CREATE
 262         def_bool TMPFS || HUGETLBFS
 263
 264 config ARCH_HAS_GIGANTIC_PAGE
 265         bool
 266
 267 source "fs/configfs/Kconfig"
 268 source "fs/efivarfs/Kconfig"
 269
 270 endmenu
 271
 272 menuconfig MISC_FILESYSTEMS
 273         bool "Miscellaneous filesystems"
 274         default y
 275         help
 276           Say Y here to get to see options for various miscellaneous
 277           filesystems, such as filesystems that came from other
 278           operating systems.
 279
 280           This option alone does not add any kernel code.
 281
 282           If you say N, all options in this submenu will be skipped and
 283           disabled; if unsure, say Y here.
 284
 285 if MISC_FILESYSTEMS
 286
 287 source "fs/orangefs/Kconfig"
 288 source "fs/adfs/Kconfig"
 289 source "fs/affs/Kconfig"
 290 source "fs/ecryptfs/Kconfig"
 291 source "fs/hfs/Kconfig"
 292 source "fs/hfsplus/Kconfig"
 293 source "fs/befs/Kconfig"
 294 source "fs/bfs/Kconfig"
 295 source "fs/efs/Kconfig"
 296 source "fs/jffs2/Kconfig"
 297 # UBIFS File system configuration
 298 source "fs/ubifs/Kconfig"
 299 source "fs/cramfs/Kconfig"
 300 source "fs/squashfs/Kconfig"
 301 source "fs/freevxfs/Kconfig"
 302 source "fs/minix/Kconfig"
 303 source "fs/omfs/Kconfig"
 304 source "fs/hpfs/Kconfig"
 305 source "fs/qnx4/Kconfig"
 306 source "fs/qnx6/Kconfig"
 307 source "fs/romfs/Kconfig"
 308 source "fs/pstore/Kconfig"
 309 source "fs/sysv/Kconfig"
 310 source "fs/ufs/Kconfig"
 311 source "fs/erofs/Kconfig"
 312 source "fs/vboxsf/Kconfig"
 313
 314 endif # MISC_FILESYSTEMS
 315
 316 menuconfig NETWORK_FILESYSTEMS
 317         bool "Network File Systems"
 318         default y
 319         depends on NET
 320         help
 321           Say Y here to get to see options for network filesystems and
 322           filesystem-related networking code, such as NFS daemon and
 323           RPCSEC security modules.
 324
 325           This option alone does not add any kernel code.
 326
 327           If you say N, all options in this submenu will be skipped and
 328           disabled; if unsure, say Y here.
 329
 330 if NETWORK_FILESYSTEMS
 331
 332 source "fs/nfs/Kconfig"
 333 source "fs/nfsd/Kconfig"
 334
 335 config GRACE_PERIOD
 336         tristate
 337
 338 config LOCKD
 339         tristate
 340         depends on FILE_LOCKING
 341         select GRACE_PERIOD
 342
 343 config LOCKD_V4
 344         bool
 345         depends on NFSD_V3 || NFS_V3
 346         depends on FILE_LOCKING
 347         default y
 348
 349 config NFS_ACL_SUPPORT
 350         tristate
 351         select FS_POSIX_ACL
 352
 353 config NFS_COMMON
 354         bool
 355         depends on NFSD || NFS_FS || LOCKD
 356         default y
 357
 358 config NFS_V4_2_SSC_HELPER
 359         bool
 360         default y if NFS_V4_2
 361
 362 source "net/sunrpc/Kconfig"
 363 source "fs/ceph/Kconfig"
 364 source "fs/cifs/Kconfig"
 365 source "fs/coda/Kconfig"
 366 source "fs/afs/Kconfig"
 367 source "fs/9p/Kconfig"
 368
 369 endif # NETWORK_FILESYSTEMS
 370
 371 source "fs/nls/Kconfig"
 372 source "fs/dlm/Kconfig"
 373 source "fs/unicode/Kconfig"
 374
 375 config IO_WQ
 376         bool
 377
 378 endmenu