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/fscache/Kconfig" 129source "fs/cachefiles/Kconfig" 130 131endmenu 132 133if BLOCK 134menu "CD-ROM/DVD Filesystems" 135 136source "fs/isofs/Kconfig" 137source "fs/udf/Kconfig" 138 139endmenu 140endif # BLOCK 141 142if BLOCK 143menu "DOS/FAT/EXFAT/NT Filesystems" 144 145source "fs/fat/Kconfig" 146source "fs/exfat/Kconfig" 147source "fs/ntfs/Kconfig" 148 149endmenu 150endif # BLOCK 151 152menu "Pseudo filesystems" 153 154source "fs/proc/Kconfig" 155source "fs/kernfs/Kconfig" 156source "fs/sysfs/Kconfig" 157 158config TMPFS 159 bool "Tmpfs virtual memory file system support (former shm fs)" 160 depends on SHMEM 161 help 162 Tmpfs is a file system which keeps all files in virtual memory. 163 164 Everything in tmpfs is temporary in the sense that no files will be 165 created on your hard drive. The files live in memory and swap 166 space. If you unmount a tmpfs instance, everything stored therein is 167 lost. 168 169 See <file:Documentation/filesystems/tmpfs.rst> for details. 170 171config TMPFS_POSIX_ACL 172 bool "Tmpfs POSIX Access Control Lists" 173 depends on TMPFS 174 select TMPFS_XATTR 175 select FS_POSIX_ACL 176 help 177 POSIX Access Control Lists (ACLs) support additional access rights 178 for users and groups beyond the standard owner/group/world scheme, 179 and this option selects support for ACLs specifically for tmpfs 180 filesystems. 181 182 If you've selected TMPFS, it's possible that you'll also need 183 this option as there are a number of Linux distros that require 184 POSIX ACL support under /dev for certain features to work properly. 185 For example, some distros need this feature for ALSA-related /dev 186 files for sound to work properly. In short, if you're not sure, 187 say Y. 188 189config TMPFS_XATTR 190 bool "Tmpfs extended attributes" 191 depends on TMPFS 192 default n 193 help 194 Extended attributes are name:value pairs associated with inodes by 195 the kernel or by users (see the attr(5) manual page for details). 196 197 Currently this enables support for the trusted.* and 198 security.* namespaces. 199 200 You need this for POSIX ACL support on tmpfs. 201 202 If unsure, say N. 203 204config TMPFS_INODE64 205 bool "Use 64-bit ino_t by default in tmpfs" 206 depends on TMPFS && 64BIT && !(S390 || ALPHA) 207 default n 208 help 209 tmpfs has historically used only inode numbers as wide as an unsigned 210 int. In some cases this can cause wraparound, potentially resulting 211 in multiple files with the same inode number on a single device. This 212 option makes tmpfs use the full width of ino_t by default, without 213 needing to specify the inode64 option when mounting. 214 215 But if a long-lived tmpfs is to be accessed by 32-bit applications so 216 ancient that opening a file larger than 2GiB fails with EINVAL, then 217 the INODE64 config option and inode64 mount option risk operations 218 failing with EOVERFLOW once 33-bit inode numbers are reached. 219 220 To override this configured default, use the inode32 or inode64 221 option when mounting. 222 223 If unsure, say N. 224 225config HUGETLBFS 226 bool "HugeTLB file system support" 227 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \ 228 SYS_SUPPORTS_HUGETLBFS || BROKEN 229 help 230 hugetlbfs is a filesystem backing for HugeTLB pages, based on 231 ramfs. For architectures that support it, say Y here and read 232 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 233 234 If unsure, say N. 235 236config HUGETLB_PAGE 237 def_bool HUGETLBFS 238 239config MEMFD_CREATE 240 def_bool TMPFS || HUGETLBFS 241 242config ARCH_HAS_GIGANTIC_PAGE 243 bool 244 245source "fs/configfs/Kconfig" 246source "fs/efivarfs/Kconfig" 247 248endmenu 249 250menuconfig MISC_FILESYSTEMS 251 bool "Miscellaneous filesystems" 252 default y 253 help 254 Say Y here to get to see options for various miscellaneous 255 filesystems, such as filesystems that came from other 256 operating systems. 257 258 This option alone does not add any kernel code. 259 260 If you say N, all options in this submenu will be skipped and 261 disabled; if unsure, say Y here. 262 263if MISC_FILESYSTEMS 264 265source "fs/orangefs/Kconfig" 266source "fs/adfs/Kconfig" 267source "fs/affs/Kconfig" 268source "fs/ecryptfs/Kconfig" 269source "fs/hfs/Kconfig" 270source "fs/hfsplus/Kconfig" 271source "fs/befs/Kconfig" 272source "fs/bfs/Kconfig" 273source "fs/efs/Kconfig" 274source "fs/jffs2/Kconfig" 275# UBIFS File system configuration 276source "fs/ubifs/Kconfig" 277source "fs/cramfs/Kconfig" 278source "fs/squashfs/Kconfig" 279source "fs/freevxfs/Kconfig" 280source "fs/minix/Kconfig" 281source "fs/omfs/Kconfig" 282source "fs/hpfs/Kconfig" 283source "fs/qnx4/Kconfig" 284source "fs/qnx6/Kconfig" 285source "fs/romfs/Kconfig" 286source "fs/pstore/Kconfig" 287source "fs/sysv/Kconfig" 288source "fs/ufs/Kconfig" 289source "fs/erofs/Kconfig" 290source "fs/vboxsf/Kconfig" 291 292endif # MISC_FILESYSTEMS 293 294menuconfig NETWORK_FILESYSTEMS 295 bool "Network File Systems" 296 default y 297 depends on NET 298 help 299 Say Y here to get to see options for network filesystems and 300 filesystem-related networking code, such as NFS daemon and 301 RPCSEC security modules. 302 303 This option alone does not add any kernel code. 304 305 If you say N, all options in this submenu will be skipped and 306 disabled; if unsure, say Y here. 307 308if NETWORK_FILESYSTEMS 309 310source "fs/nfs/Kconfig" 311source "fs/nfsd/Kconfig" 312 313config GRACE_PERIOD 314 tristate 315 316config LOCKD 317 tristate 318 depends on FILE_LOCKING 319 select GRACE_PERIOD 320 321config LOCKD_V4 322 bool 323 depends on NFSD_V3 || NFS_V3 324 depends on FILE_LOCKING 325 default y 326 327config NFS_ACL_SUPPORT 328 tristate 329 select FS_POSIX_ACL 330 331config NFS_COMMON 332 bool 333 depends on NFSD || NFS_FS || LOCKD 334 default y 335 336config NFS_V4_2_SSC_HELPER 337 tristate 338 default y if NFS_V4=y || NFS_FS=y 339 340source "net/sunrpc/Kconfig" 341source "fs/ceph/Kconfig" 342source "fs/cifs/Kconfig" 343source "fs/coda/Kconfig" 344source "fs/afs/Kconfig" 345source "fs/9p/Kconfig" 346 347endif # NETWORK_FILESYSTEMS 348 349source "fs/nls/Kconfig" 350source "fs/dlm/Kconfig" 351source "fs/unicode/Kconfig" 352 353config IO_WQ 354 bool 355 356endmenu 357