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" 149 150endmenu 151endif # BLOCK 152 153menu "Pseudo filesystems" 154 155source "fs/proc/Kconfig" 156source "fs/kernfs/Kconfig" 157source "fs/sysfs/Kconfig" 158 159config TMPFS 160 bool "Tmpfs virtual memory file system support (former shm fs)" 161 depends on SHMEM 162 help 163 Tmpfs is a file system which keeps all files in virtual memory. 164 165 Everything in tmpfs is temporary in the sense that no files will be 166 created on your hard drive. The files live in memory and swap 167 space. If you unmount a tmpfs instance, everything stored therein is 168 lost. 169 170 See <file:Documentation/filesystems/tmpfs.rst> for details. 171 172config TMPFS_POSIX_ACL 173 bool "Tmpfs POSIX Access Control Lists" 174 depends on TMPFS 175 select TMPFS_XATTR 176 select FS_POSIX_ACL 177 help 178 POSIX Access Control Lists (ACLs) support additional access rights 179 for users and groups beyond the standard owner/group/world scheme, 180 and this option selects support for ACLs specifically for tmpfs 181 filesystems. 182 183 If you've selected TMPFS, it's possible that you'll also need 184 this option as there are a number of Linux distros that require 185 POSIX ACL support under /dev for certain features to work properly. 186 For example, some distros need this feature for ALSA-related /dev 187 files for sound to work properly. In short, if you're not sure, 188 say Y. 189 190config TMPFS_XATTR 191 bool "Tmpfs extended attributes" 192 depends on TMPFS 193 default n 194 help 195 Extended attributes are name:value pairs associated with inodes by 196 the kernel or by users (see the attr(5) manual page for details). 197 198 Currently this enables support for the trusted.* and 199 security.* namespaces. 200 201 You need this for POSIX ACL support on tmpfs. 202 203 If unsure, say N. 204 205config TMPFS_INODE64 206 bool "Use 64-bit ino_t by default in tmpfs" 207 depends on TMPFS && 64BIT 208 default n 209 help 210 tmpfs has historically used only inode numbers as wide as an unsigned 211 int. In some cases this can cause wraparound, potentially resulting 212 in multiple files with the same inode number on a single device. This 213 option makes tmpfs use the full width of ino_t by default, without 214 needing to specify the inode64 option when mounting. 215 216 But if a long-lived tmpfs is to be accessed by 32-bit applications so 217 ancient that opening a file larger than 2GiB fails with EINVAL, then 218 the INODE64 config option and inode64 mount option risk operations 219 failing with EOVERFLOW once 33-bit inode numbers are reached. 220 221 To override this configured default, use the inode32 or inode64 222 option when mounting. 223 224 If unsure, say N. 225 226config ARCH_SUPPORTS_HUGETLBFS 227 def_bool n 228 229config HUGETLBFS 230 bool "HugeTLB file system support" 231 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \ 232 ARCH_SUPPORTS_HUGETLBFS || BROKEN 233 help 234 hugetlbfs is a filesystem backing for HugeTLB pages, based on 235 ramfs. For architectures that support it, say Y here and read 236 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 237 238 If unsure, say N. 239 240config HUGETLB_PAGE 241 def_bool HUGETLBFS 242 243config HUGETLB_PAGE_FREE_VMEMMAP 244 def_bool HUGETLB_PAGE 245 depends on X86_64 246 depends on SPARSEMEM_VMEMMAP 247 248config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON 249 bool "Default freeing vmemmap pages of HugeTLB to on" 250 default n 251 depends on HUGETLB_PAGE_FREE_VMEMMAP 252 help 253 When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap 254 pages associated with each HugeTLB page is default off. Say Y here 255 to enable freeing vmemmap pages of HugeTLB by default. It can then 256 be disabled on the command line via hugetlb_free_vmemmap=off. 257 258config MEMFD_CREATE 259 def_bool TMPFS || HUGETLBFS 260 261config ARCH_HAS_GIGANTIC_PAGE 262 bool 263 264source "fs/configfs/Kconfig" 265source "fs/efivarfs/Kconfig" 266 267endmenu 268 269menuconfig MISC_FILESYSTEMS 270 bool "Miscellaneous filesystems" 271 default y 272 help 273 Say Y here to get to see options for various miscellaneous 274 filesystems, such as filesystems that came from other 275 operating systems. 276 277 This option alone does not add any kernel code. 278 279 If you say N, all options in this submenu will be skipped and 280 disabled; if unsure, say Y here. 281 282if MISC_FILESYSTEMS 283 284source "fs/orangefs/Kconfig" 285source "fs/adfs/Kconfig" 286source "fs/affs/Kconfig" 287source "fs/ecryptfs/Kconfig" 288source "fs/hfs/Kconfig" 289source "fs/hfsplus/Kconfig" 290source "fs/befs/Kconfig" 291source "fs/bfs/Kconfig" 292source "fs/efs/Kconfig" 293source "fs/jffs2/Kconfig" 294# UBIFS File system configuration 295source "fs/ubifs/Kconfig" 296source "fs/cramfs/Kconfig" 297source "fs/squashfs/Kconfig" 298source "fs/freevxfs/Kconfig" 299source "fs/minix/Kconfig" 300source "fs/omfs/Kconfig" 301source "fs/hpfs/Kconfig" 302source "fs/qnx4/Kconfig" 303source "fs/qnx6/Kconfig" 304source "fs/romfs/Kconfig" 305source "fs/pstore/Kconfig" 306source "fs/sysv/Kconfig" 307source "fs/ufs/Kconfig" 308source "fs/erofs/Kconfig" 309source "fs/vboxsf/Kconfig" 310 311endif # MISC_FILESYSTEMS 312 313menuconfig NETWORK_FILESYSTEMS 314 bool "Network File Systems" 315 default y 316 depends on NET 317 help 318 Say Y here to get to see options for network filesystems and 319 filesystem-related networking code, such as NFS daemon and 320 RPCSEC security modules. 321 322 This option alone does not add any kernel code. 323 324 If you say N, all options in this submenu will be skipped and 325 disabled; if unsure, say Y here. 326 327if NETWORK_FILESYSTEMS 328 329source "fs/nfs/Kconfig" 330source "fs/nfsd/Kconfig" 331 332config GRACE_PERIOD 333 tristate 334 335config LOCKD 336 tristate 337 depends on FILE_LOCKING 338 select GRACE_PERIOD 339 340config LOCKD_V4 341 bool 342 depends on NFSD_V3 || NFS_V3 343 depends on FILE_LOCKING 344 default y 345 346config NFS_ACL_SUPPORT 347 tristate 348 select FS_POSIX_ACL 349 350config NFS_COMMON 351 bool 352 depends on NFSD || NFS_FS || LOCKD 353 default y 354 355config NFS_V4_2_SSC_HELPER 356 bool 357 default y if NFS_V4_2 358 359source "net/sunrpc/Kconfig" 360source "fs/ceph/Kconfig" 361source "fs/cifs/Kconfig" 362source "fs/coda/Kconfig" 363source "fs/afs/Kconfig" 364source "fs/9p/Kconfig" 365 366endif # NETWORK_FILESYSTEMS 367 368source "fs/nls/Kconfig" 369source "fs/dlm/Kconfig" 370source "fs/unicode/Kconfig" 371 372config IO_WQ 373 bool 374 375endmenu 376