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
  44 config FS_DAX
  45         bool "Direct Access (DAX) support"
  46         depends on MMU
  47         depends on !(ARM || MIPS || SPARC)
  48         select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
  49         select FS_IOMAP
  50         select DAX
  51         help
  52           Direct Access (DAX) can be used on memory-backed block devices.
  53           If the block device supports DAX and the filesystem supports DAX,
  54           then you can avoid using the pagecache to buffer I/Os.  Turning
  55           on this option will compile in support for DAX; you will need to
  56           mount the filesystem using the -o dax option.
  57
  58           If you do not have a block device that is capable of using this,
  59           or if unsure, say N.  Saying Y will increase the size of the kernel
  60           by about 5kB.
  61
  62 config FS_DAX_PMD
  63         bool
  64         default FS_DAX
  65         depends on FS_DAX
  66         depends on ZONE_DEVICE
  67         depends on TRANSPARENT_HUGEPAGE
  68
  69 # Selected by DAX drivers that do not expect filesystem DAX to support
  70 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  71 # for fork() of processes with MAP_SHARED mappings or support for
  72 # direct-I/O to a DAX mapping.
  73 config FS_DAX_LIMITED
  74         bool
  75
  76 endif # BLOCK
  77
  78 # Posix ACL utility routines
  79 #
  80 # Note: Posix ACLs can be implemented without these helpers.  Never use
  81 # this symbol for ifdefs in core code.
  82 #
  83 config FS_POSIX_ACL
  84         def_bool n
  85
  86 config EXPORTFS
  87         tristate
  88
  89 config EXPORTFS_BLOCK_OPS
  90         bool "Enable filesystem export operations for block IO"
  91         help
  92           This option enables the export operations for a filesystem to support
  93           external block IO.
  94
  95 config FILE_LOCKING
  96         bool "Enable POSIX file locking API" if EXPERT
  97         default y
  98         help
  99           This option enables standard file locking support, required
 100           for filesystems like NFS and for the flock() system
 101           call. Disabling this option saves about 11k.
 102
 103 config MANDATORY_FILE_LOCKING
 104         bool "Enable Mandatory file locking"
 105         depends on FILE_LOCKING
 106         default y
 107         help
 108           This option enables files appropriately marked files on appropriely
 109           mounted filesystems to support mandatory locking.
 110
 111           To the best of my knowledge this is dead code that no one cares about.
 112
 113 source "fs/crypto/Kconfig"
 114
 115 source "fs/verity/Kconfig"
 116
 117 source "fs/notify/Kconfig"
 118
 119 source "fs/quota/Kconfig"
 120
 121 source "fs/autofs/Kconfig"
 122 source "fs/fuse/Kconfig"
 123 source "fs/overlayfs/Kconfig"
 124
 125 config SHIFT_FS
 126         tristate "UID/GID shifting overlay filesystem for containers"
 127         help
 128           This filesystem can overlay any mounted filesystem and shift
 129           the uid/gid the files appear at.  The idea is that
 130           unprivileged containers can use this to mount root volumes
 131           using this technique.
 132
 133 config SHIFT_FS_POSIX_ACL
 134         bool "shiftfs POSIX Access Control Lists"
 135         depends on SHIFT_FS
 136         select FS_POSIX_ACL
 137         help
 138           POSIX Access Control Lists (ACLs) support permissions for users and
 139           groups beyond the owner/group/world scheme.
 140
 141           If you don't know what Access Control Lists are, say N.
 142
 143 menu "Caches"
 144
 145 source "fs/fscache/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/NT Filesystems"
 161
 162 source "fs/fat/Kconfig"
 163 source "fs/ntfs/Kconfig"
 164
 165 endmenu
 166 endif # BLOCK
 167
 168 menu "Pseudo filesystems"
 169
 170 source "fs/proc/Kconfig"
 171 source "fs/kernfs/Kconfig"
 172 source "fs/sysfs/Kconfig"
 173
 174 config TMPFS
 175         bool "Tmpfs virtual memory file system support (former shm fs)"
 176         depends on SHMEM
 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.txt> 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           Currently this enables support for the trusted.* and
 214           security.* namespaces.
 215
 216           You need this for POSIX ACL support on tmpfs.
 217
 218           If unsure, say N.
 219
 220 config HUGETLBFS
 221         bool "HugeTLB file system support"
 222         depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
 223                    SYS_SUPPORTS_HUGETLBFS || BROKEN
 224         help
 225           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 226           ramfs. For architectures that support it, say Y here and read
 227           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 228
 229           If unsure, say N.
 230
 231 config HUGETLB_PAGE
 232         def_bool HUGETLBFS
 233
 234 config MEMFD_CREATE
 235         def_bool TMPFS || HUGETLBFS
 236
 237 config ARCH_HAS_GIGANTIC_PAGE
 238         bool
 239
 240 source "fs/configfs/Kconfig"
 241 source "fs/efivarfs/Kconfig"
 242
 243 endmenu
 244
 245 menuconfig MISC_FILESYSTEMS
 246         bool "Miscellaneous filesystems"
 247         default y
 248         ---help---
 249           Say Y here to get to see options for various miscellaneous
 250           filesystems, such as filesystems that came from other
 251           operating systems.
 252
 253           This option alone does not add any kernel code.
 254
 255           If you say N, all options in this submenu will be skipped and
 256           disabled; if unsure, say Y here.
 257
 258 if MISC_FILESYSTEMS
 259
 260 source "fs/orangefs/Kconfig"
 261 source "fs/adfs/Kconfig"
 262 source "fs/affs/Kconfig"
 263 source "fs/ecryptfs/Kconfig"
 264 source "fs/hfs/Kconfig"
 265 source "fs/hfsplus/Kconfig"
 266 source "fs/befs/Kconfig"
 267 source "fs/bfs/Kconfig"
 268 source "fs/efs/Kconfig"
 269 source "fs/jffs2/Kconfig"
 270 # UBIFS File system configuration
 271 source "fs/ubifs/Kconfig"
 272 source "fs/cramfs/Kconfig"
 273 source "fs/squashfs/Kconfig"
 274 source "fs/freevxfs/Kconfig"
 275 source "fs/minix/Kconfig"
 276 source "fs/omfs/Kconfig"
 277 source "fs/hpfs/Kconfig"
 278 source "fs/qnx4/Kconfig"
 279 source "fs/qnx6/Kconfig"
 280 source "fs/romfs/Kconfig"
 281 source "fs/pstore/Kconfig"
 282 source "fs/sysv/Kconfig"
 283 source "fs/ufs/Kconfig"
 284 source "fs/erofs/Kconfig"
 285 source "fs/aufs/Kconfig"
 286
 287 endif # MISC_FILESYSTEMS
 288
 289 menuconfig NETWORK_FILESYSTEMS
 290         bool "Network File Systems"
 291         default y
 292         depends on NET
 293         ---help---
 294           Say Y here to get to see options for network filesystems and
 295           filesystem-related networking code, such as NFS daemon and
 296           RPCSEC security modules.
 297
 298           This option alone does not add any kernel code.
 299
 300           If you say N, all options in this submenu will be skipped and
 301           disabled; if unsure, say Y here.
 302
 303 if NETWORK_FILESYSTEMS
 304
 305 source "fs/nfs/Kconfig"
 306 source "fs/nfsd/Kconfig"
 307
 308 config GRACE_PERIOD
 309         tristate
 310
 311 config LOCKD
 312         tristate
 313         depends on FILE_LOCKING
 314         select GRACE_PERIOD
 315
 316 config LOCKD_V4
 317         bool
 318         depends on NFSD_V3 || NFS_V3
 319         depends on FILE_LOCKING
 320         default y
 321
 322 config NFS_ACL_SUPPORT
 323         tristate
 324         select FS_POSIX_ACL
 325
 326 config NFS_COMMON
 327         bool
 328         depends on NFSD || NFS_FS || LOCKD
 329         default y
 330
 331 source "net/sunrpc/Kconfig"
 332 source "fs/ceph/Kconfig"
 333 source "fs/cifs/Kconfig"
 334 source "fs/coda/Kconfig"
 335 source "fs/afs/Kconfig"
 336 source "fs/9p/Kconfig"
 337
 338 endif # NETWORK_FILESYSTEMS
 339
 340 source "fs/nls/Kconfig"
 341 source "fs/dlm/Kconfig"
 342 source "fs/unicode/Kconfig"
 343
 344 endmenu