1# SPDX-License-Identifier: GPL-2.0-only 2# 3# File system configuration 4# 5 6menu "File systems" 7 8# Use unaligned word dcache accesses 9config DCACHE_WORD_ACCESS 10 bool 11 12config 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 18config FS_IOMAP 19 bool 20 21# old blockdev_direct_IO implementation. Use iomap for new code instead 22config LEGACY_DIRECT_IO 23 bool 24 25if BLOCK 26 27source "fs/ext2/Kconfig" 28source "fs/ext4/Kconfig" 29source "fs/jbd2/Kconfig" 30 31config 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 38source "fs/reiserfs/Kconfig" 39source "fs/jfs/Kconfig" 40 41source "fs/xfs/Kconfig" 42source "fs/gfs2/Kconfig" 43source "fs/ocfs2/Kconfig" 44source "fs/btrfs/Kconfig" 45source "fs/nilfs2/Kconfig" 46source "fs/f2fs/Kconfig" 47source "fs/zonefs/Kconfig" 48 49endif # BLOCK 50 51config 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 84config 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. 95config 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# 103config FS_POSIX_ACL 104 def_bool n 105 106config EXPORTFS 107 tristate 108 109config 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 115config 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 123source "fs/crypto/Kconfig" 124 125source "fs/verity/Kconfig" 126 127source "fs/notify/Kconfig" 128 129source "fs/quota/Kconfig" 130 131source "fs/autofs/Kconfig" 132source "fs/fuse/Kconfig" 133source "fs/overlayfs/Kconfig" 134 135menu "Caches" 136 137source "fs/netfs/Kconfig" 138source "fs/fscache/Kconfig" 139source "fs/cachefiles/Kconfig" 140 141endmenu 142 143if BLOCK 144menu "CD-ROM/DVD Filesystems" 145 146source "fs/isofs/Kconfig" 147source "fs/udf/Kconfig" 148 149endmenu 150endif # BLOCK 151 152if BLOCK 153menu "DOS/FAT/EXFAT/NT Filesystems" 154 155source "fs/fat/Kconfig" 156source "fs/exfat/Kconfig" 157source "fs/ntfs/Kconfig" 158source "fs/ntfs3/Kconfig" 159 160endmenu 161endif # BLOCK 162 163menu "Pseudo filesystems" 164 165source "fs/proc/Kconfig" 166source "fs/kernfs/Kconfig" 167source "fs/sysfs/Kconfig" 168 169config 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 182config 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 200config 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 This enables support for the trusted.*, security.* and user.* 209 namespaces. 210 211 You need this for POSIX ACL support on tmpfs. 212 213 If unsure, say N. 214 215config 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 236config TMPFS_QUOTA 237 bool "Tmpfs quota support" 238 depends on TMPFS 239 select QUOTA 240 help 241 Quota support allows to set per user and group limits for tmpfs 242 usage. Say Y to enable quota support. Once enabled you can control 243 user and group quota enforcement with quota, usrquota and grpquota 244 mount options. 245 246 If unsure, say N. 247 248config ARCH_SUPPORTS_HUGETLBFS 249 def_bool n 250 251config HUGETLBFS 252 bool "HugeTLB file system support" 253 depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN 254 depends on (SYSFS || SYSCTL) 255 help 256 hugetlbfs is a filesystem backing for HugeTLB pages, based on 257 ramfs. For architectures that support it, say Y here and read 258 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 259 260 If unsure, say N. 261 262config HUGETLB_PAGE 263 def_bool HUGETLBFS 264 265config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 266 def_bool HUGETLB_PAGE 267 depends on ARCH_WANT_OPTIMIZE_VMEMMAP 268 depends on SPARSEMEM_VMEMMAP 269 270config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON 271 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on" 272 default n 273 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP 274 help 275 The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to 276 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off 277 (boot command line) or hugetlb_optimize_vmemmap (sysctl). 278 279config MEMFD_CREATE 280 def_bool TMPFS || HUGETLBFS 281 282config ARCH_HAS_GIGANTIC_PAGE 283 bool 284 285source "fs/configfs/Kconfig" 286source "fs/efivarfs/Kconfig" 287 288endmenu 289 290menuconfig MISC_FILESYSTEMS 291 bool "Miscellaneous filesystems" 292 default y 293 help 294 Say Y here to get to see options for various miscellaneous 295 filesystems, such as filesystems that came from other 296 operating systems. 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 303if MISC_FILESYSTEMS 304 305source "fs/orangefs/Kconfig" 306source "fs/adfs/Kconfig" 307source "fs/affs/Kconfig" 308source "fs/ecryptfs/Kconfig" 309source "fs/hfs/Kconfig" 310source "fs/hfsplus/Kconfig" 311source "fs/befs/Kconfig" 312source "fs/bfs/Kconfig" 313source "fs/efs/Kconfig" 314source "fs/jffs2/Kconfig" 315# UBIFS File system configuration 316source "fs/ubifs/Kconfig" 317source "fs/cramfs/Kconfig" 318source "fs/squashfs/Kconfig" 319source "fs/freevxfs/Kconfig" 320source "fs/minix/Kconfig" 321source "fs/omfs/Kconfig" 322source "fs/hpfs/Kconfig" 323source "fs/qnx4/Kconfig" 324source "fs/qnx6/Kconfig" 325source "fs/romfs/Kconfig" 326source "fs/pstore/Kconfig" 327source "fs/sysv/Kconfig" 328source "fs/ufs/Kconfig" 329source "fs/erofs/Kconfig" 330source "fs/vboxsf/Kconfig" 331 332endif # MISC_FILESYSTEMS 333 334menuconfig NETWORK_FILESYSTEMS 335 bool "Network File Systems" 336 default y 337 depends on NET 338 help 339 Say Y here to get to see options for network filesystems and 340 filesystem-related networking code, such as NFS daemon and 341 RPCSEC security modules. 342 343 This option alone does not add any kernel code. 344 345 If you say N, all options in this submenu will be skipped and 346 disabled; if unsure, say Y here. 347 348if NETWORK_FILESYSTEMS 349 350source "fs/nfs/Kconfig" 351source "fs/nfsd/Kconfig" 352 353config GRACE_PERIOD 354 tristate 355 356config LOCKD 357 tristate 358 depends on FILE_LOCKING 359 select GRACE_PERIOD 360 361config LOCKD_V4 362 bool 363 depends on NFSD || NFS_V3 364 depends on FILE_LOCKING 365 default y 366 367config NFS_ACL_SUPPORT 368 tristate 369 select FS_POSIX_ACL 370 371config NFS_COMMON 372 bool 373 depends on NFSD || NFS_FS || LOCKD 374 default y 375 376config NFS_V4_2_SSC_HELPER 377 bool 378 default y if NFS_V4_2 379 380source "net/sunrpc/Kconfig" 381source "fs/ceph/Kconfig" 382 383source "fs/smb/Kconfig" 384source "fs/coda/Kconfig" 385source "fs/afs/Kconfig" 386source "fs/9p/Kconfig" 387 388endif # NETWORK_FILESYSTEMS 389 390source "fs/nls/Kconfig" 391source "fs/dlm/Kconfig" 392source "fs/unicode/Kconfig" 393 394config IO_WQ 395 bool 396 397endmenu 398