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 253config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 254 def_bool HUGETLB_PAGE 255 depends on ARCH_WANT_OPTIMIZE_VMEMMAP 256 depends on SPARSEMEM_VMEMMAP 257 258config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON 259 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on" 260 default n 261 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP 262 help 263 The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to 264 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off 265 (boot command line) or hugetlb_optimize_vmemmap (sysctl). 266 267config MEMFD_CREATE 268 def_bool TMPFS || HUGETLBFS 269 270config ARCH_HAS_GIGANTIC_PAGE 271 bool 272 273source "fs/configfs/Kconfig" 274source "fs/efivarfs/Kconfig" 275 276endmenu 277 278menuconfig MISC_FILESYSTEMS 279 bool "Miscellaneous filesystems" 280 default y 281 help 282 Say Y here to get to see options for various miscellaneous 283 filesystems, such as filesystems that came from other 284 operating systems. 285 286 This option alone does not add any kernel code. 287 288 If you say N, all options in this submenu will be skipped and 289 disabled; if unsure, say Y here. 290 291if MISC_FILESYSTEMS 292 293source "fs/orangefs/Kconfig" 294source "fs/adfs/Kconfig" 295source "fs/affs/Kconfig" 296source "fs/ecryptfs/Kconfig" 297source "fs/hfs/Kconfig" 298source "fs/hfsplus/Kconfig" 299source "fs/befs/Kconfig" 300source "fs/bfs/Kconfig" 301source "fs/efs/Kconfig" 302source "fs/jffs2/Kconfig" 303# UBIFS File system configuration 304source "fs/ubifs/Kconfig" 305source "fs/cramfs/Kconfig" 306source "fs/squashfs/Kconfig" 307source "fs/freevxfs/Kconfig" 308source "fs/minix/Kconfig" 309source "fs/omfs/Kconfig" 310source "fs/hpfs/Kconfig" 311source "fs/qnx4/Kconfig" 312source "fs/qnx6/Kconfig" 313source "fs/romfs/Kconfig" 314source "fs/pstore/Kconfig" 315source "fs/sysv/Kconfig" 316source "fs/ufs/Kconfig" 317source "fs/erofs/Kconfig" 318source "fs/vboxsf/Kconfig" 319 320endif # MISC_FILESYSTEMS 321 322menuconfig NETWORK_FILESYSTEMS 323 bool "Network File Systems" 324 default y 325 depends on NET 326 help 327 Say Y here to get to see options for network filesystems and 328 filesystem-related networking code, such as NFS daemon and 329 RPCSEC security modules. 330 331 This option alone does not add any kernel code. 332 333 If you say N, all options in this submenu will be skipped and 334 disabled; if unsure, say Y here. 335 336if NETWORK_FILESYSTEMS 337 338source "fs/nfs/Kconfig" 339source "fs/nfsd/Kconfig" 340 341config GRACE_PERIOD 342 tristate 343 344config LOCKD 345 tristate 346 depends on FILE_LOCKING 347 select GRACE_PERIOD 348 349config LOCKD_V4 350 bool 351 depends on NFSD || NFS_V3 352 depends on FILE_LOCKING 353 default y 354 355config NFS_ACL_SUPPORT 356 tristate 357 select FS_POSIX_ACL 358 359config NFS_COMMON 360 bool 361 depends on NFSD || NFS_FS || LOCKD 362 default y 363 364config NFS_V4_2_SSC_HELPER 365 bool 366 default y if NFS_V4_2 367 368source "net/sunrpc/Kconfig" 369source "fs/ceph/Kconfig" 370 371source "fs/cifs/Kconfig" 372source "fs/ksmbd/Kconfig" 373 374config SMBFS_COMMON 375 tristate 376 default y if CIFS=y || SMB_SERVER=y 377 default m if CIFS=m || SMB_SERVER=m 378 379source "fs/coda/Kconfig" 380source "fs/afs/Kconfig" 381source "fs/9p/Kconfig" 382 383endif # NETWORK_FILESYSTEMS 384 385source "fs/nls/Kconfig" 386source "fs/dlm/Kconfig" 387source "fs/unicode/Kconfig" 388 389config IO_WQ 390 bool 391 392endmenu 393