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 # old blockdev_direct_IO implementation.  Use iomap for new code instead
  22 config LEGACY_DIRECT_IO
  23         bool
  24
  25 if BLOCK
  26
  27 source "fs/ext2/Kconfig"
  28 source "fs/ext4/Kconfig"
  29 source "fs/jbd2/Kconfig"
  30
  31 config FS_MBCACHE
  32 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
  33         tristate
  34         default y if EXT2_FS=y && EXT2_FS_XATTR
  35         default y if EXT4_FS=y
  36         default m if EXT2_FS_XATTR || EXT4_FS
  37
  38 source "fs/reiserfs/Kconfig"
  39 source "fs/jfs/Kconfig"
  40
  41 source "fs/xfs/Kconfig"
  42 source "fs/gfs2/Kconfig"
  43 source "fs/ocfs2/Kconfig"
  44 source "fs/btrfs/Kconfig"
  45 source "fs/nilfs2/Kconfig"
  46 source "fs/f2fs/Kconfig"
  47 source "fs/zonefs/Kconfig"
  48
  49 endif # BLOCK
  50
  51 config FS_DAX
  52         bool "File system based Direct Access (DAX) support"
  53         depends on MMU
  54         depends on !(ARM || MIPS || SPARC)
  55         depends on ZONE_DEVICE || FS_DAX_LIMITED
  56         select FS_IOMAP
  57         select DAX
  58         help
  59           Direct Access (DAX) can be used on memory-backed block devices.
  60           If the block device supports DAX and the filesystem supports DAX,
  61           then you can avoid using the pagecache to buffer I/Os.  Turning
  62           on this option will compile in support for DAX.
  63
  64           For a DAX device to support file system access it needs to have
  65           struct pages.  For the nfit based NVDIMMs this can be enabled
  66           using the ndctl utility:
  67
  68                 # ndctl create-namespace --force --reconfig=namespace0.0 \
  69                         --mode=fsdax --map=mem
  70
  71           See the 'create-namespace' man page for details on the overhead of
  72           --map=mem:
  73           https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
  74
  75           For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
  76           file systems DAX support needs to be manually enabled globally or
  77           per-inode using a mount option as well.  See the file documentation in
  78           Documentation/filesystems/dax.rst for details.
  79
  80           If you do not have a block device that is capable of using this,
  81           or if unsure, say N.  Saying Y will increase the size of the kernel
  82           by about 5kB.
  83
  84 config FS_DAX_PMD
  85         bool
  86         default FS_DAX
  87         depends on FS_DAX
  88         depends on ZONE_DEVICE
  89         depends on TRANSPARENT_HUGEPAGE
  90
  91 # Selected by DAX drivers that do not expect filesystem DAX to support
  92 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
  93 # for fork() of processes with MAP_SHARED mappings or support for
  94 # direct-I/O to a DAX mapping.
  95 config FS_DAX_LIMITED
  96         bool
  97
  98 # Posix ACL utility routines
  99 #
 100 # Note: Posix ACLs can be implemented without these helpers.  Never use
 101 # this symbol for ifdefs in core code.
 102 #
 103 config FS_POSIX_ACL
 104         def_bool n
 105
 106 config EXPORTFS
 107         tristate
 108
 109 config EXPORTFS_BLOCK_OPS
 110         bool "Enable filesystem export operations for block IO"
 111         help
 112           This option enables the export operations for a filesystem to support
 113           external block IO.
 114
 115 config FILE_LOCKING
 116         bool "Enable POSIX file locking API" if EXPERT
 117         default y
 118         help
 119           This option enables standard file locking support, required
 120           for filesystems like NFS and for the flock() system
 121           call. Disabling this option saves about 11k.
 122
 123 source "fs/crypto/Kconfig"
 124
 125 source "fs/verity/Kconfig"
 126
 127 source "fs/notify/Kconfig"
 128
 129 source "fs/quota/Kconfig"
 130
 131 source "fs/autofs/Kconfig"
 132 source "fs/fuse/Kconfig"
 133 source "fs/overlayfs/Kconfig"
 134
 135 menu "Caches"
 136
 137 source "fs/netfs/Kconfig"
 138 source "fs/fscache/Kconfig"
 139 source "fs/cachefiles/Kconfig"
 140
 141 endmenu
 142
 143 if BLOCK
 144 menu "CD-ROM/DVD Filesystems"
 145
 146 source "fs/isofs/Kconfig"
 147 source "fs/udf/Kconfig"
 148
 149 endmenu
 150 endif # BLOCK
 151
 152 if BLOCK
 153 menu "DOS/FAT/EXFAT/NT Filesystems"
 154
 155 source "fs/fat/Kconfig"
 156 source "fs/exfat/Kconfig"
 157 source "fs/ntfs/Kconfig"
 158 source "fs/ntfs3/Kconfig"
 159
 160 endmenu
 161 endif # BLOCK
 162
 163 menu "Pseudo filesystems"
 164
 165 source "fs/proc/Kconfig"
 166 source "fs/kernfs/Kconfig"
 167 source "fs/sysfs/Kconfig"
 168
 169 config TMPFS
 170         bool "Tmpfs virtual memory file system support (former shm fs)"
 171         depends on SHMEM
 172         help
 173           Tmpfs is a file system which keeps all files in virtual memory.
 174
 175           Everything in tmpfs is temporary in the sense that no files will be
 176           created on your hard drive. The files live in memory and swap
 177           space. If you unmount a tmpfs instance, everything stored therein is
 178           lost.
 179
 180           See <file:Documentation/filesystems/tmpfs.rst> for details.
 181
 182 config TMPFS_POSIX_ACL
 183         bool "Tmpfs POSIX Access Control Lists"
 184         depends on TMPFS
 185         select TMPFS_XATTR
 186         select FS_POSIX_ACL
 187         help
 188           POSIX Access Control Lists (ACLs) support additional access rights
 189           for users and groups beyond the standard owner/group/world scheme,
 190           and this option selects support for ACLs specifically for tmpfs
 191           filesystems.
 192
 193           If you've selected TMPFS, it's possible that you'll also need
 194           this option as there are a number of Linux distros that require
 195           POSIX ACL support under /dev for certain features to work properly.
 196           For example, some distros need this feature for ALSA-related /dev
 197           files for sound to work properly.  In short, if you're not sure,
 198           say Y.
 199
 200 config TMPFS_XATTR
 201         bool "Tmpfs extended attributes"
 202         depends on TMPFS
 203         default n
 204         help
 205           Extended attributes are name:value pairs associated with inodes by
 206           the kernel or by users (see the attr(5) manual page for details).
 207
 208           Currently this enables support for the trusted.* and
 209           security.* namespaces.
 210
 211           You need this for POSIX ACL support on tmpfs.
 212
 213           If unsure, say N.
 214
 215 config TMPFS_INODE64
 216         bool "Use 64-bit ino_t by default in tmpfs"
 217         depends on TMPFS && 64BIT
 218         default n
 219         help
 220           tmpfs has historically used only inode numbers as wide as an unsigned
 221           int. In some cases this can cause wraparound, potentially resulting
 222           in multiple files with the same inode number on a single device. This
 223           option makes tmpfs use the full width of ino_t by default, without
 224           needing to specify the inode64 option when mounting.
 225
 226           But if a long-lived tmpfs is to be accessed by 32-bit applications so
 227           ancient that opening a file larger than 2GiB fails with EINVAL, then
 228           the INODE64 config option and inode64 mount option risk operations
 229           failing with EOVERFLOW once 33-bit inode numbers are reached.
 230
 231           To override this configured default, use the inode32 or inode64
 232           option when mounting.
 233
 234           If unsure, say N.
 235
 236 config ARCH_SUPPORTS_HUGETLBFS
 237         def_bool n
 238
 239 config HUGETLBFS
 240         bool "HugeTLB file system support"
 241         depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
 242         depends on (SYSFS || SYSCTL)
 243         help
 244           hugetlbfs is a filesystem backing for HugeTLB pages, based on
 245           ramfs. For architectures that support it, say Y here and read
 246           <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
 247
 248           If unsure, say N.
 249
 250 config HUGETLB_PAGE
 251         def_bool HUGETLBFS
 252
 253 #
 254 # Select this config option from the architecture Kconfig, if it is preferred
 255 # to enable the feature of HugeTLB Vmemmap Optimization (HVO).
 256 #
 257 config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 258         bool
 259
 260 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 261         def_bool HUGETLB_PAGE
 262         depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 263         depends on SPARSEMEM_VMEMMAP
 264
 265 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
 266         bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
 267         default n
 268         depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 269         help
 270           The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
 271           enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
 272           (boot command line) or hugetlb_optimize_vmemmap (sysctl).
 273
 274 config MEMFD_CREATE
 275         def_bool TMPFS || HUGETLBFS
 276
 277 config ARCH_HAS_GIGANTIC_PAGE
 278         bool
 279
 280 source "fs/configfs/Kconfig"
 281 source "fs/efivarfs/Kconfig"
 282
 283 endmenu
 284
 285 menuconfig MISC_FILESYSTEMS
 286         bool "Miscellaneous filesystems"
 287         default y
 288         help
 289           Say Y here to get to see options for various miscellaneous
 290           filesystems, such as filesystems that came from other
 291           operating systems.
 292
 293           This option alone does not add any kernel code.
 294
 295           If you say N, all options in this submenu will be skipped and
 296           disabled; if unsure, say Y here.
 297
 298 if MISC_FILESYSTEMS
 299
 300 source "fs/orangefs/Kconfig"
 301 source "fs/adfs/Kconfig"
 302 source "fs/affs/Kconfig"
 303 source "fs/ecryptfs/Kconfig"
 304 source "fs/hfs/Kconfig"
 305 source "fs/hfsplus/Kconfig"
 306 source "fs/befs/Kconfig"
 307 source "fs/bfs/Kconfig"
 308 source "fs/efs/Kconfig"
 309 source "fs/jffs2/Kconfig"
 310 # UBIFS File system configuration
 311 source "fs/ubifs/Kconfig"
 312 source "fs/cramfs/Kconfig"
 313 source "fs/squashfs/Kconfig"
 314 source "fs/freevxfs/Kconfig"
 315 source "fs/minix/Kconfig"
 316 source "fs/omfs/Kconfig"
 317 source "fs/hpfs/Kconfig"
 318 source "fs/qnx4/Kconfig"
 319 source "fs/qnx6/Kconfig"
 320 source "fs/romfs/Kconfig"
 321 source "fs/pstore/Kconfig"
 322 source "fs/sysv/Kconfig"
 323 source "fs/ufs/Kconfig"
 324 source "fs/erofs/Kconfig"
 325 source "fs/vboxsf/Kconfig"
 326
 327 endif # MISC_FILESYSTEMS
 328
 329 menuconfig NETWORK_FILESYSTEMS
 330         bool "Network File Systems"
 331         default y
 332         depends on NET
 333         help
 334           Say Y here to get to see options for network filesystems and
 335           filesystem-related networking code, such as NFS daemon and
 336           RPCSEC security modules.
 337
 338           This option alone does not add any kernel code.
 339
 340           If you say N, all options in this submenu will be skipped and
 341           disabled; if unsure, say Y here.
 342
 343 if NETWORK_FILESYSTEMS
 344
 345 source "fs/nfs/Kconfig"
 346 source "fs/nfsd/Kconfig"
 347
 348 config GRACE_PERIOD
 349         tristate
 350
 351 config LOCKD
 352         tristate
 353         depends on FILE_LOCKING
 354         select GRACE_PERIOD
 355
 356 config LOCKD_V4
 357         bool
 358         depends on NFSD || NFS_V3
 359         depends on FILE_LOCKING
 360         default y
 361
 362 config NFS_ACL_SUPPORT
 363         tristate
 364         select FS_POSIX_ACL
 365
 366 config NFS_COMMON
 367         bool
 368         depends on NFSD || NFS_FS || LOCKD
 369         default y
 370
 371 config NFS_V4_2_SSC_HELPER
 372         bool
 373         default y if NFS_V4_2
 374
 375 source "net/sunrpc/Kconfig"
 376 source "fs/ceph/Kconfig"
 377
 378 source "fs/cifs/Kconfig"
 379 source "fs/ksmbd/Kconfig"
 380
 381 config SMBFS_COMMON
 382         tristate
 383         default y if CIFS=y || SMB_SERVER=y
 384         default m if CIFS=m || SMB_SERVER=m
 385
 386 source "fs/coda/Kconfig"
 387 source "fs/afs/Kconfig"
 388 source "fs/9p/Kconfig"
 389
 390 endif # NETWORK_FILESYSTEMS
 391
 392 source "fs/nls/Kconfig"
 393 source "fs/dlm/Kconfig"
 394 source "fs/unicode/Kconfig"
 395
 396 config IO_WQ
 397         bool
 398
 399 endmenu