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/hmdfs/Kconfig" 26source "fs/jbd2/Kconfig" 27 28config FS_MBCACHE 29# Meta block cache for Extended Attributes (ext2/ext3/ext4) 30 tristate 31 default y if EXT2_FS=y && EXT2_FS_XATTR 32 default y if EXT4_FS=y 33 default m if EXT2_FS_XATTR || EXT4_FS 34 35source "fs/reiserfs/Kconfig" 36source "fs/jfs/Kconfig" 37 38source "fs/xfs/Kconfig" 39source "fs/gfs2/Kconfig" 40source "fs/ocfs2/Kconfig" 41source "fs/btrfs/Kconfig" 42source "fs/nilfs2/Kconfig" 43source "fs/f2fs/Kconfig" 44source "fs/zonefs/Kconfig" 45 46config FS_DAX 47 bool "Direct Access (DAX) support" 48 depends on MMU 49 depends on !(ARM || MIPS || SPARC) 50 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED) 51 select FS_IOMAP 52 select DAX 53 help 54 Direct Access (DAX) can be used on memory-backed block devices. 55 If the block device supports DAX and the filesystem supports DAX, 56 then you can avoid using the pagecache to buffer I/Os. Turning 57 on this option will compile in support for DAX; you will need to 58 mount the filesystem using the -o dax option. 59 60 If you do not have a block device that is capable of using this, 61 or if unsure, say N. Saying Y will increase the size of the kernel 62 by about 5kB. 63 64config FS_DAX_PMD 65 bool 66 default FS_DAX 67 depends on FS_DAX 68 depends on ZONE_DEVICE 69 depends on TRANSPARENT_HUGEPAGE 70 71# Selected by DAX drivers that do not expect filesystem DAX to support 72# get_user_pages() of DAX mappings. I.e. "limited" indicates no support 73# for fork() of processes with MAP_SHARED mappings or support for 74# direct-I/O to a DAX mapping. 75config FS_DAX_LIMITED 76 bool 77 78endif # BLOCK 79 80# Posix ACL utility routines 81# 82# Note: Posix ACLs can be implemented without these helpers. Never use 83# this symbol for ifdefs in core code. 84# 85config FS_POSIX_ACL 86 def_bool n 87 88config EXPORTFS 89 tristate 90 91config EXPORTFS_BLOCK_OPS 92 bool "Enable filesystem export operations for block IO" 93 help 94 This option enables the export operations for a filesystem to support 95 external block IO. 96 97config FILE_LOCKING 98 bool "Enable POSIX file locking API" if EXPERT 99 default y 100 help 101 This option enables standard file locking support, required 102 for filesystems like NFS and for the flock() system 103 call. Disabling this option saves about 11k. 104 105config MANDATORY_FILE_LOCKING 106 bool "Enable Mandatory file locking" 107 depends on FILE_LOCKING 108 default y 109 help 110 This option enables files appropriately marked files on appropriely 111 mounted filesystems to support mandatory locking. 112 113 To the best of my knowledge this is dead code that no one cares about. 114 115source "fs/crypto/Kconfig" 116 117source "fs/verity/Kconfig" 118 119source "fs/notify/Kconfig" 120 121source "fs/quota/Kconfig" 122 123source "fs/autofs/Kconfig" 124source "fs/fuse/Kconfig" 125source "fs/overlayfs/Kconfig" 126 127menu "Caches" 128 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 && !(S390 || ALPHA) 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 HUGETLBFS 227 bool "HugeTLB file system support" 228 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \ 229 SYS_SUPPORTS_HUGETLBFS || BROKEN 230 help 231 hugetlbfs is a filesystem backing for HugeTLB pages, based on 232 ramfs. For architectures that support it, say Y here and read 233 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 234 235 If unsure, say N. 236 237config HUGETLB_PAGE 238 def_bool HUGETLBFS 239 240config MEMFD_CREATE 241 def_bool TMPFS || HUGETLBFS 242 243config ARCH_HAS_GIGANTIC_PAGE 244 bool 245 246source "fs/configfs/Kconfig" 247source "fs/efivarfs/Kconfig" 248 249endmenu 250 251menuconfig MISC_FILESYSTEMS 252 bool "Miscellaneous filesystems" 253 default y 254 help 255 Say Y here to get to see options for various miscellaneous 256 filesystems, such as filesystems that came from other 257 operating systems. 258 259 This option alone does not add any kernel code. 260 261 If you say N, all options in this submenu will be skipped and 262 disabled; if unsure, say Y here. 263 264if MISC_FILESYSTEMS 265 266source "fs/orangefs/Kconfig" 267source "fs/adfs/Kconfig" 268source "fs/affs/Kconfig" 269source "fs/ecryptfs/Kconfig" 270source "fs/hfs/Kconfig" 271source "fs/hfsplus/Kconfig" 272source "fs/befs/Kconfig" 273source "fs/bfs/Kconfig" 274source "fs/efs/Kconfig" 275source "fs/jffs2/Kconfig" 276# UBIFS File system configuration 277source "fs/ubifs/Kconfig" 278source "fs/cramfs/Kconfig" 279source "fs/squashfs/Kconfig" 280source "fs/freevxfs/Kconfig" 281source "fs/minix/Kconfig" 282source "fs/omfs/Kconfig" 283source "fs/hpfs/Kconfig" 284source "fs/qnx4/Kconfig" 285source "fs/qnx6/Kconfig" 286source "fs/romfs/Kconfig" 287source "fs/pstore/Kconfig" 288source "fs/sysv/Kconfig" 289source "fs/ufs/Kconfig" 290source "fs/erofs/Kconfig" 291source "fs/vboxsf/Kconfig" 292 293endif # MISC_FILESYSTEMS 294 295menuconfig NETWORK_FILESYSTEMS 296 bool "Network File Systems" 297 default y 298 depends on NET 299 help 300 Say Y here to get to see options for network filesystems and 301 filesystem-related networking code, such as NFS daemon and 302 RPCSEC security modules. 303 304 This option alone does not add any kernel code. 305 306 If you say N, all options in this submenu will be skipped and 307 disabled; if unsure, say Y here. 308 309if NETWORK_FILESYSTEMS 310 311source "fs/nfs/Kconfig" 312source "fs/nfsd/Kconfig" 313 314config GRACE_PERIOD 315 tristate 316 317config LOCKD 318 tristate 319 depends on FILE_LOCKING 320 select GRACE_PERIOD 321 322config LOCKD_V4 323 bool 324 depends on NFSD_V3 || NFS_V3 325 depends on FILE_LOCKING 326 default y 327 328config NFS_ACL_SUPPORT 329 tristate 330 select FS_POSIX_ACL 331 332config NFS_COMMON 333 bool 334 depends on NFSD || NFS_FS || LOCKD 335 default y 336 337source "net/sunrpc/Kconfig" 338source "fs/ceph/Kconfig" 339source "fs/cifs/Kconfig" 340source "fs/coda/Kconfig" 341source "fs/afs/Kconfig" 342source "fs/9p/Kconfig" 343 344endif # NETWORK_FILESYSTEMS 345 346source "fs/nls/Kconfig" 347source "fs/dlm/Kconfig" 348source "fs/unicode/Kconfig" 349 350config IO_WQ 351 bool 352 353endmenu 354