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 "File system based 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. 57 58 For a DAX device to support file system access it needs to have 59 struct pages. For the nfit based NVDIMMs this can be enabled 60 using the ndctl utility: 61 62 # ndctl create-namespace --force --reconfig=namespace0.0 \ 63 --mode=fsdax --map=mem 64 65 See the 'create-namespace' man page for details on the overhead of 66 --map=mem: 67 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace 68 69 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most 70 file systems DAX support needs to be manually enabled globally or 71 per-inode using a mount option as well. See the file documentation in 72 Documentation/filesystems/dax.rst for details. 73 74 If you do not have a block device that is capable of using this, 75 or if unsure, say N. Saying Y will increase the size of the kernel 76 by about 5kB. 77 78config FS_DAX_PMD 79 bool 80 default FS_DAX 81 depends on FS_DAX 82 depends on ZONE_DEVICE 83 depends on TRANSPARENT_HUGEPAGE 84 85# Selected by DAX drivers that do not expect filesystem DAX to support 86# get_user_pages() of DAX mappings. I.e. "limited" indicates no support 87# for fork() of processes with MAP_SHARED mappings or support for 88# direct-I/O to a DAX mapping. 89config FS_DAX_LIMITED 90 bool 91 92endif # BLOCK 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 248config HUGETLB_PAGE_FREE_VMEMMAP 249 def_bool HUGETLB_PAGE 250 depends on X86_64 251 depends on SPARSEMEM_VMEMMAP 252 253config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON 254 bool "Default freeing vmemmap pages of HugeTLB to on" 255 default n 256 depends on HUGETLB_PAGE_FREE_VMEMMAP 257 help 258 When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap 259 pages associated with each HugeTLB page is default off. Say Y here 260 to enable freeing vmemmap pages of HugeTLB by default. It can then 261 be disabled on the command line via hugetlb_free_vmemmap=off. 262 263config MEMFD_CREATE 264 def_bool TMPFS || HUGETLBFS 265 266config ARCH_HAS_GIGANTIC_PAGE 267 bool 268 269source "fs/configfs/Kconfig" 270source "fs/efivarfs/Kconfig" 271 272endmenu 273 274menuconfig MISC_FILESYSTEMS 275 bool "Miscellaneous filesystems" 276 default y 277 help 278 Say Y here to get to see options for various miscellaneous 279 filesystems, such as filesystems that came from other 280 operating systems. 281 282 This option alone does not add any kernel code. 283 284 If you say N, all options in this submenu will be skipped and 285 disabled; if unsure, say Y here. 286 287if MISC_FILESYSTEMS 288 289source "fs/orangefs/Kconfig" 290source "fs/adfs/Kconfig" 291source "fs/affs/Kconfig" 292source "fs/ecryptfs/Kconfig" 293source "fs/hfs/Kconfig" 294source "fs/hfsplus/Kconfig" 295source "fs/befs/Kconfig" 296source "fs/bfs/Kconfig" 297source "fs/efs/Kconfig" 298source "fs/jffs2/Kconfig" 299# UBIFS File system configuration 300source "fs/ubifs/Kconfig" 301source "fs/cramfs/Kconfig" 302source "fs/squashfs/Kconfig" 303source "fs/freevxfs/Kconfig" 304source "fs/minix/Kconfig" 305source "fs/omfs/Kconfig" 306source "fs/hpfs/Kconfig" 307source "fs/qnx4/Kconfig" 308source "fs/qnx6/Kconfig" 309source "fs/romfs/Kconfig" 310source "fs/pstore/Kconfig" 311source "fs/sysv/Kconfig" 312source "fs/ufs/Kconfig" 313source "fs/erofs/Kconfig" 314source "fs/vboxsf/Kconfig" 315 316endif # MISC_FILESYSTEMS 317 318menuconfig NETWORK_FILESYSTEMS 319 bool "Network File Systems" 320 default y 321 depends on NET 322 help 323 Say Y here to get to see options for network filesystems and 324 filesystem-related networking code, such as NFS daemon and 325 RPCSEC security modules. 326 327 This option alone does not add any kernel code. 328 329 If you say N, all options in this submenu will be skipped and 330 disabled; if unsure, say Y here. 331 332if NETWORK_FILESYSTEMS 333 334source "fs/nfs/Kconfig" 335source "fs/nfsd/Kconfig" 336 337config GRACE_PERIOD 338 tristate 339 340config LOCKD 341 tristate 342 depends on FILE_LOCKING 343 select GRACE_PERIOD 344 345config LOCKD_V4 346 bool 347 depends on NFSD_V3 || NFS_V3 348 depends on FILE_LOCKING 349 default y 350 351config NFS_ACL_SUPPORT 352 tristate 353 select FS_POSIX_ACL 354 355config NFS_COMMON 356 bool 357 depends on NFSD || NFS_FS || LOCKD 358 default y 359 360config NFS_V4_2_SSC_HELPER 361 bool 362 default y if NFS_V4_2 363 364source "net/sunrpc/Kconfig" 365source "fs/ceph/Kconfig" 366 367source "fs/cifs/Kconfig" 368source "fs/ksmbd/Kconfig" 369 370config SMBFS_COMMON 371 tristate 372 default y if CIFS=y 373 default m if CIFS=m 374 375source "fs/coda/Kconfig" 376source "fs/afs/Kconfig" 377source "fs/9p/Kconfig" 378 379endif # NETWORK_FILESYSTEMS 380 381source "fs/nls/Kconfig" 382source "fs/dlm/Kconfig" 383source "fs/unicode/Kconfig" 384 385config IO_WQ 386 bool 387 388endmenu 389