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 21config BUFFER_HEAD 22 bool 23 24# old blockdev_direct_IO implementation. Use iomap for new code instead 25config LEGACY_DIRECT_IO 26 depends on BUFFER_HEAD 27 bool 28 29if BLOCK 30 31source "fs/ext2/Kconfig" 32source "fs/ext4/Kconfig" 33source "fs/hmdfs/Kconfig" 34source "fs/sharefs/Kconfig" 35source "fs/jbd2/Kconfig" 36 37config FS_MBCACHE 38# Meta block cache for Extended Attributes (ext2/ext3/ext4) 39 tristate 40 default y if EXT2_FS=y && EXT2_FS_XATTR 41 default y if EXT4_FS=y 42 default m if EXT2_FS_XATTR || EXT4_FS 43 44source "fs/reiserfs/Kconfig" 45source "fs/jfs/Kconfig" 46 47source "fs/xfs/Kconfig" 48source "fs/gfs2/Kconfig" 49source "fs/ocfs2/Kconfig" 50source "fs/btrfs/Kconfig" 51source "fs/nilfs2/Kconfig" 52source "fs/f2fs/Kconfig" 53source "fs/zonefs/Kconfig" 54source "fs/proc/memory_security/Kconfig" 55 56endif # BLOCK 57 58config FS_DAX 59 bool "File system based Direct Access (DAX) support" 60 depends on MMU 61 depends on !(ARM || MIPS || SPARC) 62 depends on ZONE_DEVICE || FS_DAX_LIMITED 63 select FS_IOMAP 64 select DAX 65 help 66 Direct Access (DAX) can be used on memory-backed block devices. 67 If the block device supports DAX and the filesystem supports DAX, 68 then you can avoid using the pagecache to buffer I/Os. Turning 69 on this option will compile in support for DAX. 70 71 For a DAX device to support file system access it needs to have 72 struct pages. For the nfit based NVDIMMs this can be enabled 73 using the ndctl utility: 74 75 # ndctl create-namespace --force --reconfig=namespace0.0 \ 76 --mode=fsdax --map=mem 77 78 See the 'create-namespace' man page for details on the overhead of 79 --map=mem: 80 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace 81 82 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most 83 file systems DAX support needs to be manually enabled globally or 84 per-inode using a mount option as well. See the file documentation in 85 Documentation/filesystems/dax.rst for details. 86 87 If you do not have a block device that is capable of using this, 88 or if unsure, say N. Saying Y will increase the size of the kernel 89 by about 5kB. 90 91config FS_DAX_PMD 92 bool 93 default FS_DAX 94 depends on FS_DAX 95 depends on ZONE_DEVICE 96 depends on TRANSPARENT_HUGEPAGE 97 98# Selected by DAX drivers that do not expect filesystem DAX to support 99# get_user_pages() of DAX mappings. I.e. "limited" indicates no support 100# for fork() of processes with MAP_SHARED mappings or support for 101# direct-I/O to a DAX mapping. 102config FS_DAX_LIMITED 103 bool 104 105# Posix ACL utility routines 106# 107# Note: Posix ACLs can be implemented without these helpers. Never use 108# this symbol for ifdefs in core code. 109# 110config FS_POSIX_ACL 111 def_bool n 112 113config EXPORTFS 114 tristate 115 116config EXPORTFS_BLOCK_OPS 117 bool "Enable filesystem export operations for block IO" 118 help 119 This option enables the export operations for a filesystem to support 120 external block IO. 121 122config FILE_LOCKING 123 bool "Enable POSIX file locking API" if EXPERT 124 default y 125 help 126 This option enables standard file locking support, required 127 for filesystems like NFS and for the flock() system 128 call. Disabling this option saves about 11k. 129 130source "fs/crypto/Kconfig" 131 132source "fs/code_sign/Kconfig" 133 134source "fs/verity/Kconfig" 135 136source "fs/notify/Kconfig" 137 138source "fs/quota/Kconfig" 139 140source "fs/autofs/Kconfig" 141source "fs/fuse/Kconfig" 142source "fs/overlayfs/Kconfig" 143 144menu "Caches" 145 146source "fs/netfs/Kconfig" 147source "fs/fscache/Kconfig" 148source "fs/cachefiles/Kconfig" 149 150endmenu 151 152if BLOCK 153menu "CD-ROM/DVD Filesystems" 154 155source "fs/isofs/Kconfig" 156source "fs/udf/Kconfig" 157 158endmenu 159endif # BLOCK 160 161if BLOCK 162menu "DOS/FAT/EXFAT/NT Filesystems" 163 164source "fs/fat/Kconfig" 165source "fs/exfat/Kconfig" 166source "fs/ntfs/Kconfig" 167source "fs/ntfs3/Kconfig" 168 169endmenu 170endif # BLOCK 171 172menu "Pseudo filesystems" 173 174source "fs/proc/Kconfig" 175source "fs/kernfs/Kconfig" 176source "fs/sysfs/Kconfig" 177 178config TMPFS 179 bool "Tmpfs virtual memory file system support (former shm fs)" 180 depends on SHMEM 181 select MEMFD_CREATE 182 help 183 Tmpfs is a file system which keeps all files in virtual memory. 184 185 Everything in tmpfs is temporary in the sense that no files will be 186 created on your hard drive. The files live in memory and swap 187 space. If you unmount a tmpfs instance, everything stored therein is 188 lost. 189 190 See <file:Documentation/filesystems/tmpfs.rst> for details. 191 192config TMPFS_POSIX_ACL 193 bool "Tmpfs POSIX Access Control Lists" 194 depends on TMPFS 195 select TMPFS_XATTR 196 select FS_POSIX_ACL 197 help 198 POSIX Access Control Lists (ACLs) support additional access rights 199 for users and groups beyond the standard owner/group/world scheme, 200 and this option selects support for ACLs specifically for tmpfs 201 filesystems. 202 203 If you've selected TMPFS, it's possible that you'll also need 204 this option as there are a number of Linux distros that require 205 POSIX ACL support under /dev for certain features to work properly. 206 For example, some distros need this feature for ALSA-related /dev 207 files for sound to work properly. In short, if you're not sure, 208 say Y. 209 210config TMPFS_XATTR 211 bool "Tmpfs extended attributes" 212 depends on TMPFS 213 default n 214 help 215 Extended attributes are name:value pairs associated with inodes by 216 the kernel or by users (see the attr(5) manual page for details). 217 218 This enables support for the trusted.*, security.* and user.* 219 namespaces. 220 221 You need this for POSIX ACL support on tmpfs. 222 223 If unsure, say N. 224 225config TMPFS_INODE64 226 bool "Use 64-bit ino_t by default in tmpfs" 227 depends on TMPFS && 64BIT 228 default n 229 help 230 tmpfs has historically used only inode numbers as wide as an unsigned 231 int. In some cases this can cause wraparound, potentially resulting 232 in multiple files with the same inode number on a single device. This 233 option makes tmpfs use the full width of ino_t by default, without 234 needing to specify the inode64 option when mounting. 235 236 But if a long-lived tmpfs is to be accessed by 32-bit applications so 237 ancient that opening a file larger than 2GiB fails with EINVAL, then 238 the INODE64 config option and inode64 mount option risk operations 239 failing with EOVERFLOW once 33-bit inode numbers are reached. 240 241 To override this configured default, use the inode32 or inode64 242 option when mounting. 243 244 If unsure, say N. 245 246config TMPFS_QUOTA 247 bool "Tmpfs quota support" 248 depends on TMPFS 249 select QUOTA 250 help 251 Quota support allows to set per user and group limits for tmpfs 252 usage. Say Y to enable quota support. Once enabled you can control 253 user and group quota enforcement with quota, usrquota and grpquota 254 mount options. 255 256 If unsure, say N. 257 258config ARCH_SUPPORTS_HUGETLBFS 259 def_bool n 260 261menuconfig HUGETLBFS 262 bool "HugeTLB file system support" 263 depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN 264 depends on (SYSFS || SYSCTL) 265 select MEMFD_CREATE 266 help 267 hugetlbfs is a filesystem backing for HugeTLB pages, based on 268 ramfs. For architectures that support it, say Y here and read 269 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 270 271 If unsure, say N. 272 273if HUGETLBFS 274config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON 275 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on" 276 default n 277 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP 278 help 279 The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to 280 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off 281 (boot command line) or hugetlb_optimize_vmemmap (sysctl). 282endif # HUGETLBFS 283 284config HUGETLB_PAGE 285 def_bool HUGETLBFS 286 287config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 288 def_bool HUGETLB_PAGE 289 depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP 290 depends on SPARSEMEM_VMEMMAP 291 292config HUGETLB_PMD_PAGE_TABLE_SHARING 293 def_bool HUGETLB_PAGE 294 depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS 295 296config ARCH_HAS_GIGANTIC_PAGE 297 bool 298 299source "fs/configfs/Kconfig" 300source "fs/efivarfs/Kconfig" 301 302endmenu 303 304menuconfig MISC_FILESYSTEMS 305 bool "Miscellaneous filesystems" 306 default y 307 help 308 Say Y here to get to see options for various miscellaneous 309 filesystems, such as filesystems that came from other 310 operating systems. 311 312 This option alone does not add any kernel code. 313 314 If you say N, all options in this submenu will be skipped and 315 disabled; if unsure, say Y here. 316 317if MISC_FILESYSTEMS 318 319source "fs/orangefs/Kconfig" 320source "fs/adfs/Kconfig" 321source "fs/affs/Kconfig" 322source "fs/ecryptfs/Kconfig" 323source "fs/hfs/Kconfig" 324source "fs/hfsplus/Kconfig" 325source "fs/befs/Kconfig" 326source "fs/bfs/Kconfig" 327source "fs/efs/Kconfig" 328source "fs/jffs2/Kconfig" 329# UBIFS File system configuration 330source "fs/ubifs/Kconfig" 331source "fs/cramfs/Kconfig" 332source "fs/squashfs/Kconfig" 333source "fs/freevxfs/Kconfig" 334source "fs/minix/Kconfig" 335source "fs/omfs/Kconfig" 336source "fs/hpfs/Kconfig" 337source "fs/qnx4/Kconfig" 338source "fs/qnx6/Kconfig" 339source "fs/romfs/Kconfig" 340source "fs/pstore/Kconfig" 341source "fs/sysv/Kconfig" 342source "fs/ufs/Kconfig" 343source "fs/erofs/Kconfig" 344source "fs/vboxsf/Kconfig" 345 346endif # MISC_FILESYSTEMS 347 348menuconfig NETWORK_FILESYSTEMS 349 bool "Network File Systems" 350 default y 351 depends on NET 352 help 353 Say Y here to get to see options for network filesystems and 354 filesystem-related networking code, such as NFS daemon and 355 RPCSEC security modules. 356 357 This option alone does not add any kernel code. 358 359 If you say N, all options in this submenu will be skipped and 360 disabled; if unsure, say Y here. 361 362if NETWORK_FILESYSTEMS 363 364source "fs/nfs/Kconfig" 365source "fs/nfsd/Kconfig" 366 367config GRACE_PERIOD 368 tristate 369 370config LOCKD 371 tristate 372 depends on FILE_LOCKING 373 select GRACE_PERIOD 374 375config LOCKD_V4 376 bool 377 depends on NFSD || NFS_V3 378 depends on FILE_LOCKING 379 default y 380 381config NFS_ACL_SUPPORT 382 tristate 383 select FS_POSIX_ACL 384 385config NFS_COMMON 386 bool 387 depends on NFSD || NFS_FS || LOCKD 388 default y 389 390config NFS_V4_2_SSC_HELPER 391 bool 392 default y if NFS_V4_2 393 394source "net/sunrpc/Kconfig" 395source "fs/ceph/Kconfig" 396 397source "fs/smb/Kconfig" 398source "fs/coda/Kconfig" 399source "fs/afs/Kconfig" 400source "fs/9p/Kconfig" 401 402endif # NETWORK_FILESYSTEMS 403 404source "fs/nls/Kconfig" 405source "fs/dlm/Kconfig" 406source "fs/unicode/Kconfig" 407source "fs/epfs/Kconfig" 408 409config IO_WQ 410 bool 411 412endmenu 413