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 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 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 ARCH_SUPPORTS_HUGETLBFS 237 def_bool n 238 239config 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 250config 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# 257config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP 258 bool 259 260config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 261 def_bool HUGETLB_PAGE 262 depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP 263 depends on SPARSEMEM_VMEMMAP 264 265config 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 274config MEMFD_CREATE 275 def_bool TMPFS || HUGETLBFS 276 277config ARCH_HAS_GIGANTIC_PAGE 278 bool 279 280source "fs/configfs/Kconfig" 281source "fs/efivarfs/Kconfig" 282 283endmenu 284 285menuconfig 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 298if MISC_FILESYSTEMS 299 300source "fs/orangefs/Kconfig" 301source "fs/adfs/Kconfig" 302source "fs/affs/Kconfig" 303source "fs/ecryptfs/Kconfig" 304source "fs/hfs/Kconfig" 305source "fs/hfsplus/Kconfig" 306source "fs/befs/Kconfig" 307source "fs/bfs/Kconfig" 308source "fs/efs/Kconfig" 309source "fs/jffs2/Kconfig" 310# UBIFS File system configuration 311source "fs/ubifs/Kconfig" 312source "fs/cramfs/Kconfig" 313source "fs/squashfs/Kconfig" 314source "fs/freevxfs/Kconfig" 315source "fs/minix/Kconfig" 316source "fs/omfs/Kconfig" 317source "fs/hpfs/Kconfig" 318source "fs/qnx4/Kconfig" 319source "fs/qnx6/Kconfig" 320source "fs/romfs/Kconfig" 321source "fs/pstore/Kconfig" 322source "fs/sysv/Kconfig" 323source "fs/ufs/Kconfig" 324source "fs/erofs/Kconfig" 325source "fs/vboxsf/Kconfig" 326 327endif # MISC_FILESYSTEMS 328 329menuconfig 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 343if NETWORK_FILESYSTEMS 344 345source "fs/nfs/Kconfig" 346source "fs/nfsd/Kconfig" 347 348config GRACE_PERIOD 349 tristate 350 351config LOCKD 352 tristate 353 depends on FILE_LOCKING 354 select GRACE_PERIOD 355 356config LOCKD_V4 357 bool 358 depends on NFSD || NFS_V3 359 depends on FILE_LOCKING 360 default y 361 362config NFS_ACL_SUPPORT 363 tristate 364 select FS_POSIX_ACL 365 366config NFS_COMMON 367 bool 368 depends on NFSD || NFS_FS || LOCKD 369 default y 370 371config NFS_V4_2_SSC_HELPER 372 bool 373 default y if NFS_V4_2 374 375source "net/sunrpc/Kconfig" 376source "fs/ceph/Kconfig" 377 378source "fs/cifs/Kconfig" 379source "fs/ksmbd/Kconfig" 380 381config SMBFS_COMMON 382 tristate 383 default y if CIFS=y || SMB_SERVER=y 384 default m if CIFS=m || SMB_SERVER=m 385 386source "fs/coda/Kconfig" 387source "fs/afs/Kconfig" 388source "fs/9p/Kconfig" 389 390endif # NETWORK_FILESYSTEMS 391 392source "fs/nls/Kconfig" 393source "fs/dlm/Kconfig" 394source "fs/unicode/Kconfig" 395 396config IO_WQ 397 bool 398 399endmenu 400