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 if BLOCK
  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 endif # BLOCK
  46
  47 config FS_DAX
  48         bool "File system based Direct Access (DAX) support"
  49         depends on MMU
  50         depends on !(ARM || MIPS || SPARC)
  51         depends on ZONE_DEVICE || FS_DAX_LIMITED
  52         select FS_IOMAP
  53         select DAX
  54         help
  55           Direct Access (DAX) can be used on memory-backed block devices.
  56           If the block device supports DAX and the filesystem supports DAX,
  57           then you can avoid using the pagecache to buffer I/Os.  Turning
  58           on this option will compile in support for DAX.
  59
  60           For a DAX device to support file system access it needs to have
  61           struct pages.  For the nfit based NVDIMMs this can be enabled
  62           using the ndctl utility:
  63
  64                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  65                         --mode=fsdax --map=mem
  66
  67           See the 'create-namespace' man page for details on the overhead of
  68           --map=mem:
  69           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  70
  71           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  72           file systems DAX support needs to be manually enabled globally or
  73           per-inode using a mount option as well.  See the file documentation in
  74           Documentation/filesystems/dax.rst for details.
  75
  76           If you do not have a block device that is capable of using this,
  77           or if unsure, say N.  Saying Y will increase the size of the kernel
  78           by about 5kB.
  79
  80 config FS_DAX_PMD
  81         bool
  82         default FS_DAX
  83         depends on FS_DAX
  84         depends on ZONE_DEVICE
  85         depends on TRANSPARENT_HUGEPAGE
  86
  87 # Selected by DAX drivers that do not expect filesystem DAX to support
  88 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  89 # for fork() of processes with MAP_SHARED mappings or support for
  90 # direct-I/O to a DAX mapping.
  91 config FS_DAX_LIMITED
  92         bool
  93
  94 # Posix ACL utility routines
  95 #
  96 # Note: Posix ACLs can be implemented without these helpers.  Never use
  97 # this symbol for ifdefs in core code.
  98 #
  99 config FS_POSIX_ACL
 100         def_bool n
 101
 102 config EXPORTFS
 103         tristate
 104
 105 config EXPORTFS_BLOCK_OPS
 106         bool "Enable filesystem export operations for block IO"
 107         help
 108           This option enables the export operations for a filesystem to support
 109           external block IO.
 110
 111 config FILE_LOCKING
 112         bool "Enable POSIX file locking API" if EXPERT
 113         default y
 114         help
 115           This option enables standard file locking support, required
 116           for filesystems like NFS and for the flock() system
 117           call. Disabling this option saves about 11k.
 118
 119 source "fs/crypto/Kconfig"
 120
 121 source "fs/verity/Kconfig"
 122
 123 source "fs/notify/Kconfig"
 124
 125 source "fs/quota/Kconfig"
 126
 127 source "fs/autofs/Kconfig"
 128 source "fs/fuse/Kconfig"
 129 source "fs/overlayfs/Kconfig"
 130
 131 menu "Caches"
 132
 133 source "fs/netfs/Kconfig"
 134 source "fs/fscache/Kconfig"
 135 source "fs/cachefiles/Kconfig"
 136
 137 endmenu
 138
 139 if BLOCK
 140 menu "CD-ROM/DVD Filesystems"
 141
 142 source "fs/isofs/Kconfig"
 143 source "fs/udf/Kconfig"
 144
 145 endmenu
 146 endif # BLOCK
 147
 148 if BLOCK
 149 menu "DOS/FAT/EXFAT/NT Filesystems"
 150
 151 source "fs/fat/Kconfig"
 152 source "fs/exfat/Kconfig"
 153 source "fs/ntfs/Kconfig"
 154 source "fs/ntfs3/Kconfig"
 155
 156 endmenu
 157 endif # BLOCK
 158
 159 menu "Pseudo filesystems"
 160
 161 source "fs/proc/Kconfig"
 162 source "fs/kernfs/Kconfig"
 163 source "fs/sysfs/Kconfig"
 164
 165 config TMPFS
 166         bool "Tmpfs virtual memory file system support (former shm fs)"
 167         depends on SHMEM
 168         help
 169           Tmpfs is a file system which keeps all files in virtual memory.
 170
 171           Everything in tmpfs is temporary in the sense that no files will be
 172           created on your hard drive. The files live in memory and swap
 173           space. If you unmount a tmpfs instance, everything stored therein is
 174           lost.
 175
 176           See <file:Documentation/filesystems/tmpfs.rst> for details.
 177
 178 config TMPFS_POSIX_ACL
 179         bool "Tmpfs POSIX Access Control Lists"
 180         depends on TMPFS
 181         select TMPFS_XATTR
 182         select FS_POSIX_ACL
 183         help
 184           POSIX Access Control Lists (ACLs) support additional access rights
 185           for users and groups beyond the standard owner/group/world scheme,
 186           and this option selects support for ACLs specifically for tmpfs
 187           filesystems.
 188
 189           If you've selected TMPFS, it's possible that you'll also need
 190           this option as there are a number of Linux distros that require
 191           POSIX ACL support under /dev for certain features to work properly.
 192           For example, some distros need this feature for ALSA-related /dev
 193           files for sound to work properly.  In short, if you're not sure,
 194           say Y.
 195
 196 config TMPFS_XATTR
 197         bool "Tmpfs extended attributes"
 198         depends on TMPFS
 199         default n
 200         help
 201           Extended attributes are name:value pairs associated with inodes by
 202           the kernel or by users (see the attr(5) manual page for details).
 203
 204           Currently this enables support for the trusted.* and
 205           security.* namespaces.
 206
 207           You need this for POSIX ACL support on tmpfs.
 208
 209           If unsure, say N.
 210
 211 config TMPFS_INODE64
 212         bool "Use 64-bit ino_t by default in tmpfs"
 213         depends on TMPFS && 64BIT
 214         default n
 215         help
 216           tmpfs has historically used only inode numbers as wide as an unsigned
 217           int. In some cases this can cause wraparound, potentially resulting
 218           in multiple files with the same inode number on a single device. This
 219           option makes tmpfs use the full width of ino_t by default, without
 220           needing to specify the inode64 option when mounting.
 221
 222           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 223           ancient that opening a file larger than 2GiB fails with EINVAL, then
 224           the INODE64 config option and inode64 mount option risk operations
 225           failing with EOVERFLOW once 33-bit inode numbers are reached.
 226
 227           To override this configured default, use the inode32 or inode64
 228           option when mounting.
 229
 230           If unsure, say N.
 231
 232 config ARCH_SUPPORTS_HUGETLBFS
 233         def_bool n
 234
 235 config HUGETLBFS
 236         bool "HugeTLB file system support"
 237         depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 238         help
 239           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 240           ramfs. For architectures that support it, say Y here and read
 241           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 242
 243           If unsure, say N.
 244
 245 config HUGETLB_PAGE
 246         def_bool HUGETLBFS
 247
 248 #
 249 # Select this config option from the architecture Kconfig, if it is preferred
 250 # to enable the feature of HugeTLB Vmemmap Optimization (HVO).
 251 #
 252 config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 253         bool
 254
 255 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 256         def_bool HUGETLB_PAGE
 257         depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 258         depends on SPARSEMEM_VMEMMAP
 259
 260 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
 261         bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
 262         default n
 263         depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 264         help
 265           The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
 266           enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
 267           (boot command line) or hugetlb_optimize_vmemmap (sysctl).
 268
 269 config MEMFD_CREATE
 270         def_bool TMPFS || HUGETLBFS
 271
 272 config ARCH_HAS_GIGANTIC_PAGE
 273         bool
 274
 275 source "fs/configfs/Kconfig"
 276 source "fs/efivarfs/Kconfig"
 277
 278 endmenu
 279
 280 menuconfig MISC_FILESYSTEMS
 281         bool "Miscellaneous filesystems"
 282         default y
 283         help
 284           Say Y here to get to see options for various miscellaneous
 285           filesystems, such as filesystems that came from other
 286           operating systems.
 287
 288           This option alone does not add any kernel code.
 289
 290           If you say N, all options in this submenu will be skipped and
 291           disabled; if unsure, say Y here.
 292
 293 if MISC_FILESYSTEMS
 294
 295 source "fs/orangefs/Kconfig"
 296 source "fs/adfs/Kconfig"
 297 source "fs/affs/Kconfig"
 298 source "fs/ecryptfs/Kconfig"
 299 source "fs/hfs/Kconfig"
 300 source "fs/hfsplus/Kconfig"
 301 source "fs/befs/Kconfig"
 302 source "fs/bfs/Kconfig"
 303 source "fs/efs/Kconfig"
 304 source "fs/jffs2/Kconfig"
 305 # UBIFS File system configuration
 306 source "fs/ubifs/Kconfig"
 307 source "fs/cramfs/Kconfig"
 308 source "fs/squashfs/Kconfig"
 309 source "fs/freevxfs/Kconfig"
 310 source "fs/minix/Kconfig"
 311 source "fs/omfs/Kconfig"
 312 source "fs/hpfs/Kconfig"
 313 source "fs/qnx4/Kconfig"
 314 source "fs/qnx6/Kconfig"
 315 source "fs/romfs/Kconfig"
 316 source "fs/pstore/Kconfig"
 317 source "fs/sysv/Kconfig"
 318 source "fs/ufs/Kconfig"
 319 source "fs/erofs/Kconfig"
 320 source "fs/vboxsf/Kconfig"
 321
 322 endif # MISC_FILESYSTEMS
 323
 324 menuconfig NETWORK_FILESYSTEMS
 325         bool "Network File Systems"
 326         default y
 327         depends on NET
 328         help
 329           Say Y here to get to see options for network filesystems and
 330           filesystem-related networking code, such as NFS daemon and
 331           RPCSEC security modules.
 332
 333           This option alone does not add any kernel code.
 334
 335           If you say N, all options in this submenu will be skipped and
 336           disabled; if unsure, say Y here.
 337
 338 if NETWORK_FILESYSTEMS
 339
 340 source "fs/nfs/Kconfig"
 341 source "fs/nfsd/Kconfig"
 342
 343 config GRACE_PERIOD
 344         tristate
 345
 346 config LOCKD
 347         tristate
 348         depends on FILE_LOCKING
 349         select GRACE_PERIOD
 350
 351 config LOCKD_V4
 352         bool
 353         depends on NFSD || NFS_V3
 354         depends on FILE_LOCKING
 355         default y
 356
 357 config NFS_ACL_SUPPORT
 358         tristate
 359         select FS_POSIX_ACL
 360
 361 config NFS_COMMON
 362         bool
 363         depends on NFSD || NFS_FS || LOCKD
 364         default y
 365
 366 config NFS_V4_2_SSC_HELPER
 367         bool
 368         default y if NFS_V4_2
 369
 370 source "net/sunrpc/Kconfig"
 371 source "fs/ceph/Kconfig"
 372
 373 source "fs/cifs/Kconfig"
 374 source "fs/ksmbd/Kconfig"
 375
 376 config SMBFS_COMMON
 377         tristate
 378         default y if CIFS=y || SMB_SERVER=y
 379         default m if CIFS=m || SMB_SERVER=m
 380
 381 source "fs/coda/Kconfig"
 382 source "fs/afs/Kconfig"
 383 source "fs/9p/Kconfig"
 384
 385 endif # NETWORK_FILESYSTEMS
 386
 387 source "fs/nls/Kconfig"
 388 source "fs/dlm/Kconfig"
 389 source "fs/unicode/Kconfig"
 390
 391 config IO_WQ
 392         bool
 393
 394 endmenu