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 menu "Caches"
 127
 128 source "fs/fscache/Kconfig"
 129 source "fs/cachefiles/Kconfig"
 130
 131 endmenu
 132
 133 if BLOCK
 134 menu "CD-ROM/DVD Filesystems"
 135
 136 source "fs/isofs/Kconfig"
 137 source "fs/udf/Kconfig"
 138
 139 endmenu
 140 endif # BLOCK
 141
 142 if BLOCK
 143 menu "DOS/FAT/EXFAT/NT Filesystems"
 144
 145 source "fs/fat/Kconfig"
 146 source "fs/exfat/Kconfig"
 147 source "fs/ntfs/Kconfig"
 148
 149 endmenu
 150 endif # BLOCK
 151
 152 menu "Pseudo filesystems"
 153
 154 source "fs/proc/Kconfig"
 155 source "fs/kernfs/Kconfig"
 156 source "fs/sysfs/Kconfig"
 157
 158 config TMPFS
 159         bool "Tmpfs virtual memory file system support (former shm fs)"
 160         depends on SHMEM
 161         help
 162           Tmpfs is a file system which keeps all files in virtual memory.
 163
 164           Everything in tmpfs is temporary in the sense that no files will be
 165           created on your hard drive. The files live in memory and swap
 166           space. If you unmount a tmpfs instance, everything stored therein is
 167           lost.
 168
 169           See <file:Documentation/filesystems/tmpfs.rst> for details.
 170
 171 config TMPFS_POSIX_ACL
 172         bool "Tmpfs POSIX Access Control Lists"
 173         depends on TMPFS
 174         select TMPFS_XATTR
 175         select FS_POSIX_ACL
 176         help
 177           POSIX Access Control Lists (ACLs) support additional access rights
 178           for users and groups beyond the standard owner/group/world scheme,
 179           and this option selects support for ACLs specifically for tmpfs
 180           filesystems.
 181
 182           If you've selected TMPFS, it's possible that you'll also need
 183           this option as there are a number of Linux distros that require
 184           POSIX ACL support under /dev for certain features to work properly.
 185           For example, some distros need this feature for ALSA-related /dev
 186           files for sound to work properly.  In short, if you're not sure,
 187           say Y.
 188
 189 config TMPFS_XATTR
 190         bool "Tmpfs extended attributes"
 191         depends on TMPFS
 192         default n
 193         help
 194           Extended attributes are name:value pairs associated with inodes by
 195           the kernel or by users (see the attr(5) manual page for details).
 196
 197           Currently this enables support for the trusted.* and
 198           security.* namespaces.
 199
 200           You need this for POSIX ACL support on tmpfs.
 201
 202           If unsure, say N.
 203
 204 config TMPFS_INODE64
 205         bool "Use 64-bit ino_t by default in tmpfs"
 206         depends on TMPFS && 64BIT
 207         default n
 208         help
 209           tmpfs has historically used only inode numbers as wide as an unsigned
 210           int. In some cases this can cause wraparound, potentially resulting
 211           in multiple files with the same inode number on a single device. This
 212           option makes tmpfs use the full width of ino_t by default, without
 213           needing to specify the inode64 option when mounting.
 214
 215           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 216           ancient that opening a file larger than 2GiB fails with EINVAL, then
 217           the INODE64 config option and inode64 mount option risk operations
 218           failing with EOVERFLOW once 33-bit inode numbers are reached.
 219
 220           To override this configured default, use the inode32 or inode64
 221           option when mounting.
 222
 223           If unsure, say N.
 224
 225 config HUGETLBFS
 226         bool "HugeTLB file system support"
 227         depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
 228                    SYS_SUPPORTS_HUGETLBFS || BROKEN
 229         help
 230           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 231           ramfs. For architectures that support it, say Y here and read
 232           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 233
 234           If unsure, say N.
 235
 236 config HUGETLB_PAGE
 237         def_bool HUGETLBFS
 238
 239 config MEMFD_CREATE
 240         def_bool TMPFS || HUGETLBFS
 241
 242 config ARCH_HAS_GIGANTIC_PAGE
 243         bool
 244
 245 source "fs/configfs/Kconfig"
 246 source "fs/efivarfs/Kconfig"
 247
 248 endmenu
 249
 250 menuconfig MISC_FILESYSTEMS
 251         bool "Miscellaneous filesystems"
 252         default y
 253         help
 254           Say Y here to get to see options for various miscellaneous
 255           filesystems, such as filesystems that came from other
 256           operating systems.
 257
 258           This option alone does not add any kernel code.
 259
 260           If you say N, all options in this submenu will be skipped and
 261           disabled; if unsure, say Y here.
 262
 263 if MISC_FILESYSTEMS
 264
 265 source "fs/orangefs/Kconfig"
 266 source "fs/adfs/Kconfig"
 267 source "fs/affs/Kconfig"
 268 source "fs/ecryptfs/Kconfig"
 269 source "fs/hfs/Kconfig"
 270 source "fs/hfsplus/Kconfig"
 271 source "fs/befs/Kconfig"
 272 source "fs/bfs/Kconfig"
 273 source "fs/efs/Kconfig"
 274 source "fs/jffs2/Kconfig"
 275 # UBIFS File system configuration
 276 source "fs/ubifs/Kconfig"
 277 source "fs/cramfs/Kconfig"
 278 source "fs/squashfs/Kconfig"
 279 source "fs/freevxfs/Kconfig"
 280 source "fs/minix/Kconfig"
 281 source "fs/omfs/Kconfig"
 282 source "fs/hpfs/Kconfig"
 283 source "fs/qnx4/Kconfig"
 284 source "fs/qnx6/Kconfig"
 285 source "fs/romfs/Kconfig"
 286 source "fs/pstore/Kconfig"
 287 source "fs/sysv/Kconfig"
 288 source "fs/ufs/Kconfig"
 289 source "fs/erofs/Kconfig"
 290 source "fs/vboxsf/Kconfig"
 291
 292 endif # MISC_FILESYSTEMS
 293
 294 menuconfig NETWORK_FILESYSTEMS
 295         bool "Network File Systems"
 296         default y
 297         depends on NET
 298         help
 299           Say Y here to get to see options for network filesystems and
 300           filesystem-related networking code, such as NFS daemon and
 301           RPCSEC security modules.
 302
 303           This option alone does not add any kernel code.
 304
 305           If you say N, all options in this submenu will be skipped and
 306           disabled; if unsure, say Y here.
 307
 308 if NETWORK_FILESYSTEMS
 309
 310 source "fs/nfs/Kconfig"
 311 source "fs/nfsd/Kconfig"
 312
 313 config GRACE_PERIOD
 314         tristate
 315
 316 config LOCKD
 317         tristate
 318         depends on FILE_LOCKING
 319         select GRACE_PERIOD
 320
 321 config LOCKD_V4
 322         bool
 323         depends on NFSD_V3 || NFS_V3
 324         depends on FILE_LOCKING
 325         default y
 326
 327 config NFS_ACL_SUPPORT
 328         tristate
 329         select FS_POSIX_ACL
 330
 331 config NFS_COMMON
 332         bool
 333         depends on NFSD || NFS_FS || LOCKD
 334         default y
 335
 336 source "net/sunrpc/Kconfig"
 337 source "fs/ceph/Kconfig"
 338 source "fs/cifs/Kconfig"
 339 source "fs/coda/Kconfig"
 340 source "fs/afs/Kconfig"
 341 source "fs/9p/Kconfig"
 342
 343 endif # NETWORK_FILESYSTEMS
 344
 345 source "fs/nls/Kconfig"
 346 source "fs/dlm/Kconfig"
 347 source "fs/unicode/Kconfig"
 348
 349 config IO_WQ
 350         bool
 351
 352 endmenu