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 21if BLOCK 22 23source "fs/ext2/Kconfig" 24source "fs/ext4/Kconfig" 25source "fs/jbd2/Kconfig" 26 27config 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 34source "fs/reiserfs/Kconfig" 35source "fs/jfs/Kconfig" 36 37source "fs/xfs/Kconfig" 38source "fs/gfs2/Kconfig" 39source "fs/ocfs2/Kconfig" 40source "fs/btrfs/Kconfig" 41source "fs/nilfs2/Kconfig" 42source "fs/f2fs/Kconfig" 43source "fs/zonefs/Kconfig" 44 45endif # BLOCK 46 47config 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 80config 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. 91config 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# 99config FS_POSIX_ACL 100 def_bool n 101 102config EXPORTFS 103 tristate 104 105config 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 111config 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 119source "fs/crypto/Kconfig" 120 121source "fs/verity/Kconfig" 122 123source "fs/notify/Kconfig" 124 125source "fs/quota/Kconfig" 126 127source "fs/autofs/Kconfig" 128source "fs/fuse/Kconfig" 129source "fs/overlayfs/Kconfig" 130 131menu "Caches" 132 133source "fs/netfs/Kconfig" 134source "fs/fscache/Kconfig" 135source "fs/cachefiles/Kconfig" 136 137endmenu 138 139if BLOCK 140menu "CD-ROM/DVD Filesystems" 141 142source "fs/isofs/Kconfig" 143source "fs/udf/Kconfig" 144 145endmenu 146endif # BLOCK 147 148if BLOCK 149menu "DOS/FAT/EXFAT/NT Filesystems" 150 151source "fs/fat/Kconfig" 152source "fs/exfat/Kconfig" 153source "fs/ntfs/Kconfig" 154source "fs/ntfs3/Kconfig" 155 156endmenu 157endif # BLOCK 158 159menu "Pseudo filesystems" 160 161source "fs/proc/Kconfig" 162source "fs/kernfs/Kconfig" 163source "fs/sysfs/Kconfig" 164 165config 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 178config 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 196config 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 211config 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 232config ARCH_SUPPORTS_HUGETLBFS 233 def_bool n 234 235config 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 245config 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 minimizing overhead of struct page associated with 251# each HugeTLB page. 252# 253config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP 254 bool 255 256config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 257 def_bool HUGETLB_PAGE 258 depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP 259 depends on SPARSEMEM_VMEMMAP 260 261config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON 262 bool "Default optimizing vmemmap pages of HugeTLB to on" 263 default n 264 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP 265 help 266 When using HUGETLB_PAGE_OPTIMIZE_VMEMMAP, the optimizing unused vmemmap 267 pages associated with each HugeTLB page is default off. Say Y here 268 to enable optimizing vmemmap pages of HugeTLB by default. It can then 269 be disabled on the command line via hugetlb_free_vmemmap=off. 270 271config MEMFD_CREATE 272 def_bool TMPFS || HUGETLBFS 273 274config ARCH_HAS_GIGANTIC_PAGE 275 bool 276 277source "fs/configfs/Kconfig" 278source "fs/efivarfs/Kconfig" 279 280endmenu 281 282menuconfig MISC_FILESYSTEMS 283 bool "Miscellaneous filesystems" 284 default y 285 help 286 Say Y here to get to see options for various miscellaneous 287 filesystems, such as filesystems that came from other 288 operating systems. 289 290 This option alone does not add any kernel code. 291 292 If you say N, all options in this submenu will be skipped and 293 disabled; if unsure, say Y here. 294 295if MISC_FILESYSTEMS 296 297source "fs/orangefs/Kconfig" 298source "fs/adfs/Kconfig" 299source "fs/affs/Kconfig" 300source "fs/ecryptfs/Kconfig" 301source "fs/hfs/Kconfig" 302source "fs/hfsplus/Kconfig" 303source "fs/befs/Kconfig" 304source "fs/bfs/Kconfig" 305source "fs/efs/Kconfig" 306source "fs/jffs2/Kconfig" 307# UBIFS File system configuration 308source "fs/ubifs/Kconfig" 309source "fs/cramfs/Kconfig" 310source "fs/squashfs/Kconfig" 311source "fs/freevxfs/Kconfig" 312source "fs/minix/Kconfig" 313source "fs/omfs/Kconfig" 314source "fs/hpfs/Kconfig" 315source "fs/qnx4/Kconfig" 316source "fs/qnx6/Kconfig" 317source "fs/romfs/Kconfig" 318source "fs/pstore/Kconfig" 319source "fs/sysv/Kconfig" 320source "fs/ufs/Kconfig" 321source "fs/erofs/Kconfig" 322source "fs/vboxsf/Kconfig" 323 324endif # MISC_FILESYSTEMS 325 326menuconfig NETWORK_FILESYSTEMS 327 bool "Network File Systems" 328 default y 329 depends on NET 330 help 331 Say Y here to get to see options for network filesystems and 332 filesystem-related networking code, such as NFS daemon and 333 RPCSEC security modules. 334 335 This option alone does not add any kernel code. 336 337 If you say N, all options in this submenu will be skipped and 338 disabled; if unsure, say Y here. 339 340if NETWORK_FILESYSTEMS 341 342source "fs/nfs/Kconfig" 343source "fs/nfsd/Kconfig" 344 345config GRACE_PERIOD 346 tristate 347 348config LOCKD 349 tristate 350 depends on FILE_LOCKING 351 select GRACE_PERIOD 352 353config LOCKD_V4 354 bool 355 depends on NFSD || NFS_V3 356 depends on FILE_LOCKING 357 default y 358 359config NFS_ACL_SUPPORT 360 tristate 361 select FS_POSIX_ACL 362 363config NFS_COMMON 364 bool 365 depends on NFSD || NFS_FS || LOCKD 366 default y 367 368config NFS_V4_2_SSC_HELPER 369 bool 370 default y if NFS_V4_2 371 372source "net/sunrpc/Kconfig" 373source "fs/ceph/Kconfig" 374 375source "fs/cifs/Kconfig" 376source "fs/ksmbd/Kconfig" 377 378config SMBFS_COMMON 379 tristate 380 default y if CIFS=y || SMB_SERVER=y 381 default m if CIFS=m || SMB_SERVER=m 382 383source "fs/coda/Kconfig" 384source "fs/afs/Kconfig" 385source "fs/9p/Kconfig" 386 387endif # NETWORK_FILESYSTEMS 388 389source "fs/nls/Kconfig" 390source "fs/dlm/Kconfig" 391source "fs/unicode/Kconfig" 392 393config IO_WQ 394 bool 395 396endmenu 397