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 18if BLOCK 19 20config FS_IOMAP 21 bool 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 45config FS_DAX 46 bool "Direct Access (DAX) support" 47 depends on MMU 48 depends on !(ARM || MIPS || SPARC) 49 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED) 50 select FS_IOMAP 51 select DAX 52 help 53 Direct Access (DAX) can be used on memory-backed block devices. 54 If the block device supports DAX and the filesystem supports DAX, 55 then you can avoid using the pagecache to buffer I/Os. Turning 56 on this option will compile in support for DAX; you will need to 57 mount the filesystem using the -o dax option. 58 59 If you do not have a block device that is capable of using this, 60 or if unsure, say N. Saying Y will increase the size of the kernel 61 by about 5kB. 62 63config FS_DAX_PMD 64 bool 65 default FS_DAX 66 depends on FS_DAX 67 depends on ZONE_DEVICE 68 depends on TRANSPARENT_HUGEPAGE 69 70# Selected by DAX drivers that do not expect filesystem DAX to support 71# get_user_pages() of DAX mappings. I.e. "limited" indicates no support 72# for fork() of processes with MAP_SHARED mappings or support for 73# direct-I/O to a DAX mapping. 74config FS_DAX_LIMITED 75 bool 76 77endif # BLOCK 78 79# Posix ACL utility routines 80# 81# Note: Posix ACLs can be implemented without these helpers. Never use 82# this symbol for ifdefs in core code. 83# 84config FS_POSIX_ACL 85 def_bool n 86 87config EXPORTFS 88 tristate 89 90config EXPORTFS_BLOCK_OPS 91 bool "Enable filesystem export operations for block IO" 92 help 93 This option enables the export operations for a filesystem to support 94 external block IO. 95 96config FILE_LOCKING 97 bool "Enable POSIX file locking API" if EXPERT 98 default y 99 help 100 This option enables standard file locking support, required 101 for filesystems like NFS and for the flock() system 102 call. Disabling this option saves about 11k. 103 104config MANDATORY_FILE_LOCKING 105 bool "Enable Mandatory file locking" 106 depends on FILE_LOCKING 107 default y 108 help 109 This option enables files appropriately marked files on appropriely 110 mounted filesystems to support mandatory locking. 111 112 To the best of my knowledge this is dead code that no one cares about. 113 114source "fs/crypto/Kconfig" 115 116source "fs/verity/Kconfig" 117 118source "fs/notify/Kconfig" 119 120source "fs/quota/Kconfig" 121 122source "fs/autofs/Kconfig" 123source "fs/fuse/Kconfig" 124source "fs/overlayfs/Kconfig" 125 126menu "Caches" 127 128source "fs/netfs/Kconfig" 129source "fs/fscache/Kconfig" 130source "fs/cachefiles/Kconfig" 131 132endmenu 133 134if BLOCK 135menu "CD-ROM/DVD Filesystems" 136 137source "fs/isofs/Kconfig" 138source "fs/udf/Kconfig" 139 140endmenu 141endif # BLOCK 142 143if BLOCK 144menu "DOS/FAT/EXFAT/NT Filesystems" 145 146source "fs/fat/Kconfig" 147source "fs/exfat/Kconfig" 148source "fs/ntfs/Kconfig" 149source "fs/ntfs3/Kconfig" 150 151endmenu 152endif # BLOCK 153 154menu "Pseudo filesystems" 155 156source "fs/proc/Kconfig" 157source "fs/kernfs/Kconfig" 158source "fs/sysfs/Kconfig" 159 160config TMPFS 161 bool "Tmpfs virtual memory file system support (former shm fs)" 162 depends on SHMEM 163 help 164 Tmpfs is a file system which keeps all files in virtual memory. 165 166 Everything in tmpfs is temporary in the sense that no files will be 167 created on your hard drive. The files live in memory and swap 168 space. If you unmount a tmpfs instance, everything stored therein is 169 lost. 170 171 See <file:Documentation/filesystems/tmpfs.rst> for details. 172 173config TMPFS_POSIX_ACL 174 bool "Tmpfs POSIX Access Control Lists" 175 depends on TMPFS 176 select TMPFS_XATTR 177 select FS_POSIX_ACL 178 help 179 POSIX Access Control Lists (ACLs) support additional access rights 180 for users and groups beyond the standard owner/group/world scheme, 181 and this option selects support for ACLs specifically for tmpfs 182 filesystems. 183 184 If you've selected TMPFS, it's possible that you'll also need 185 this option as there are a number of Linux distros that require 186 POSIX ACL support under /dev for certain features to work properly. 187 For example, some distros need this feature for ALSA-related /dev 188 files for sound to work properly. In short, if you're not sure, 189 say Y. 190 191config TMPFS_XATTR 192 bool "Tmpfs extended attributes" 193 depends on TMPFS 194 default n 195 help 196 Extended attributes are name:value pairs associated with inodes by 197 the kernel or by users (see the attr(5) manual page for details). 198 199 Currently this enables support for the trusted.* and 200 security.* namespaces. 201 202 You need this for POSIX ACL support on tmpfs. 203 204 If unsure, say N. 205 206config TMPFS_INODE64 207 bool "Use 64-bit ino_t by default in tmpfs" 208 depends on TMPFS && 64BIT 209 default n 210 help 211 tmpfs has historically used only inode numbers as wide as an unsigned 212 int. In some cases this can cause wraparound, potentially resulting 213 in multiple files with the same inode number on a single device. This 214 option makes tmpfs use the full width of ino_t by default, without 215 needing to specify the inode64 option when mounting. 216 217 But if a long-lived tmpfs is to be accessed by 32-bit applications so 218 ancient that opening a file larger than 2GiB fails with EINVAL, then 219 the INODE64 config option and inode64 mount option risk operations 220 failing with EOVERFLOW once 33-bit inode numbers are reached. 221 222 To override this configured default, use the inode32 or inode64 223 option when mounting. 224 225 If unsure, say N. 226 227config ARCH_SUPPORTS_HUGETLBFS 228 def_bool n 229 230config HUGETLBFS 231 bool "HugeTLB file system support" 232 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \ 233 ARCH_SUPPORTS_HUGETLBFS || BROKEN 234 help 235 hugetlbfs is a filesystem backing for HugeTLB pages, based on 236 ramfs. For architectures that support it, say Y here and read 237 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 238 239 If unsure, say N. 240 241config HUGETLB_PAGE 242 def_bool HUGETLBFS 243 244config HUGETLB_PAGE_FREE_VMEMMAP 245 def_bool HUGETLB_PAGE 246 depends on X86_64 247 depends on SPARSEMEM_VMEMMAP 248 249config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON 250 bool "Default freeing vmemmap pages of HugeTLB to on" 251 default n 252 depends on HUGETLB_PAGE_FREE_VMEMMAP 253 help 254 When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap 255 pages associated with each HugeTLB page is default off. Say Y here 256 to enable freeing vmemmap pages of HugeTLB by default. It can then 257 be disabled on the command line via hugetlb_free_vmemmap=off. 258 259config MEMFD_CREATE 260 def_bool TMPFS || HUGETLBFS 261 262config ARCH_HAS_GIGANTIC_PAGE 263 bool 264 265source "fs/configfs/Kconfig" 266source "fs/efivarfs/Kconfig" 267 268endmenu 269 270menuconfig MISC_FILESYSTEMS 271 bool "Miscellaneous filesystems" 272 default y 273 help 274 Say Y here to get to see options for various miscellaneous 275 filesystems, such as filesystems that came from other 276 operating systems. 277 278 This option alone does not add any kernel code. 279 280 If you say N, all options in this submenu will be skipped and 281 disabled; if unsure, say Y here. 282 283if MISC_FILESYSTEMS 284 285source "fs/orangefs/Kconfig" 286source "fs/adfs/Kconfig" 287source "fs/affs/Kconfig" 288source "fs/ecryptfs/Kconfig" 289source "fs/hfs/Kconfig" 290source "fs/hfsplus/Kconfig" 291source "fs/befs/Kconfig" 292source "fs/bfs/Kconfig" 293source "fs/efs/Kconfig" 294source "fs/jffs2/Kconfig" 295# UBIFS File system configuration 296source "fs/ubifs/Kconfig" 297source "fs/cramfs/Kconfig" 298source "fs/squashfs/Kconfig" 299source "fs/freevxfs/Kconfig" 300source "fs/minix/Kconfig" 301source "fs/omfs/Kconfig" 302source "fs/hpfs/Kconfig" 303source "fs/qnx4/Kconfig" 304source "fs/qnx6/Kconfig" 305source "fs/romfs/Kconfig" 306source "fs/pstore/Kconfig" 307source "fs/sysv/Kconfig" 308source "fs/ufs/Kconfig" 309source "fs/erofs/Kconfig" 310source "fs/vboxsf/Kconfig" 311 312endif # MISC_FILESYSTEMS 313 314menuconfig NETWORK_FILESYSTEMS 315 bool "Network File Systems" 316 default y 317 depends on NET 318 help 319 Say Y here to get to see options for network filesystems and 320 filesystem-related networking code, such as NFS daemon and 321 RPCSEC security modules. 322 323 This option alone does not add any kernel code. 324 325 If you say N, all options in this submenu will be skipped and 326 disabled; if unsure, say Y here. 327 328if NETWORK_FILESYSTEMS 329 330source "fs/nfs/Kconfig" 331source "fs/nfsd/Kconfig" 332 333config GRACE_PERIOD 334 tristate 335 336config LOCKD 337 tristate 338 depends on FILE_LOCKING 339 select GRACE_PERIOD 340 341config LOCKD_V4 342 bool 343 depends on NFSD_V3 || NFS_V3 344 depends on FILE_LOCKING 345 default y 346 347config NFS_ACL_SUPPORT 348 tristate 349 select FS_POSIX_ACL 350 351config NFS_COMMON 352 bool 353 depends on NFSD || NFS_FS || LOCKD 354 default y 355 356config NFS_V4_2_SSC_HELPER 357 bool 358 default y if NFS_V4_2 359 360source "net/sunrpc/Kconfig" 361source "fs/ceph/Kconfig" 362source "fs/cifs/Kconfig" 363source "fs/coda/Kconfig" 364source "fs/afs/Kconfig" 365source "fs/9p/Kconfig" 366 367endif # NETWORK_FILESYSTEMS 368 369source "fs/nls/Kconfig" 370source "fs/dlm/Kconfig" 371source "fs/unicode/Kconfig" 372 373config IO_WQ 374 bool 375 376endmenu 377