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1# SPDX-License-Identifier: GPL-2.0-only2#3# File system configuration4#5 6menu "File systems"7 8# Use unaligned word dcache accesses9config DCACHE_WORD_ACCESS10 bool11 12config VALIDATE_FS_PARSER13 bool "Validate filesystem parameter description"14 help15 Enable this to perform validation of the parameter description for a16 filesystem when it is registered.17 18config FS_IOMAP19 bool20 21# Stackable filesystems22config FS_STACK23 bool24 25config BUFFER_HEAD26 bool27 28# old blockdev_direct_IO implementation. Use iomap for new code instead29config LEGACY_DIRECT_IO30 depends on BUFFER_HEAD31 bool32 33if BLOCK34 35source "fs/ext2/Kconfig"36source "fs/ext4/Kconfig"37source "fs/jbd2/Kconfig"38 39config FS_MBCACHE40# Meta block cache for Extended Attributes (ext2/ext3/ext4)41 tristate42 default y if EXT2_FS=y && EXT2_FS_XATTR43 default y if EXT4_FS=y44 default m if EXT2_FS_XATTR || EXT4_FS45 46source "fs/reiserfs/Kconfig"47source "fs/jfs/Kconfig"48 49source "fs/xfs/Kconfig"50source "fs/gfs2/Kconfig"51source "fs/ocfs2/Kconfig"52source "fs/btrfs/Kconfig"53source "fs/nilfs2/Kconfig"54source "fs/f2fs/Kconfig"55source "fs/bcachefs/Kconfig"56source "fs/zonefs/Kconfig"57 58endif # BLOCK59 60config FS_DAX61 bool "File system based Direct Access (DAX) support"62 depends on MMU63 depends on ZONE_DEVICE || FS_DAX_LIMITED64 select FS_IOMAP65 select DAX66 help67 Direct Access (DAX) can be used on memory-backed block devices.68 If the block device supports DAX and the filesystem supports DAX,69 then you can avoid using the pagecache to buffer I/Os. Turning70 on this option will compile in support for DAX.71 72 For a DAX device to support file system access it needs to have73 struct pages. For the nfit based NVDIMMs this can be enabled74 using the ndctl utility:75 76 # ndctl create-namespace --force --reconfig=namespace0.0 \77 --mode=fsdax --map=mem78 79 See the 'create-namespace' man page for details on the overhead of80 --map=mem:81 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace82 83 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most84 file systems DAX support needs to be manually enabled globally or85 per-inode using a mount option as well. See the file documentation in86 Documentation/filesystems/dax.rst for details.87 88 If you do not have a block device that is capable of using this,89 or if unsure, say N. Saying Y will increase the size of the kernel90 by about 5kB.91 92config FS_DAX_PMD93 bool94 default FS_DAX95 depends on FS_DAX96 depends on ZONE_DEVICE97 depends on TRANSPARENT_HUGEPAGE98 99# Selected by DAX drivers that do not expect filesystem DAX to support100# get_user_pages() of DAX mappings. I.e. "limited" indicates no support101# for fork() of processes with MAP_SHARED mappings or support for102# direct-I/O to a DAX mapping.103config FS_DAX_LIMITED104 bool105 106# Posix ACL utility routines107#108# Note: Posix ACLs can be implemented without these helpers. Never use109# this symbol for ifdefs in core code.110#111config FS_POSIX_ACL112 def_bool n113 114config EXPORTFS115 tristate116 117config EXPORTFS_BLOCK_OPS118 bool "Enable filesystem export operations for block IO"119 help120 This option enables the export operations for a filesystem to support121 external block IO.122 123config FILE_LOCKING124 bool "Enable POSIX file locking API" if EXPERT125 default y126 help127 This option enables standard file locking support, required128 for filesystems like NFS and for the flock() system129 call. Disabling this option saves about 11k.130 131source "fs/crypto/Kconfig"132 133source "fs/verity/Kconfig"134 135source "fs/notify/Kconfig"136 137source "fs/quota/Kconfig"138 139source "fs/autofs/Kconfig"140source "fs/fuse/Kconfig"141source "fs/overlayfs/Kconfig"142 143menu "Caches"144 145source "fs/netfs/Kconfig"146source "fs/cachefiles/Kconfig"147 148endmenu149 150if BLOCK151menu "CD-ROM/DVD Filesystems"152 153source "fs/isofs/Kconfig"154source "fs/udf/Kconfig"155 156endmenu157endif # BLOCK158 159if BLOCK160menu "DOS/FAT/EXFAT/NT Filesystems"161 162source "fs/fat/Kconfig"163source "fs/exfat/Kconfig"164source "fs/ntfs3/Kconfig"165 166endmenu167endif # BLOCK168 169menu "Pseudo filesystems"170 171source "fs/proc/Kconfig"172source "fs/kernfs/Kconfig"173source "fs/sysfs/Kconfig"174 175config TMPFS176 bool "Tmpfs virtual memory file system support (former shm fs)"177 depends on SHMEM178 select MEMFD_CREATE179 help180 Tmpfs is a file system which keeps all files in virtual memory.181 182 Everything in tmpfs is temporary in the sense that no files will be183 created on your hard drive. The files live in memory and swap184 space. If you unmount a tmpfs instance, everything stored therein is185 lost.186 187 See <file:Documentation/filesystems/tmpfs.rst> for details.188 189config TMPFS_POSIX_ACL190 bool "Tmpfs POSIX Access Control Lists"191 depends on TMPFS192 select TMPFS_XATTR193 select FS_POSIX_ACL194 help195 POSIX Access Control Lists (ACLs) support additional access rights196 for users and groups beyond the standard owner/group/world scheme,197 and this option selects support for ACLs specifically for tmpfs198 filesystems.199 200 If you've selected TMPFS, it's possible that you'll also need201 this option as there are a number of Linux distros that require202 POSIX ACL support under /dev for certain features to work properly.203 For example, some distros need this feature for ALSA-related /dev204 files for sound to work properly. In short, if you're not sure,205 say Y.206 207config TMPFS_XATTR208 bool "Tmpfs extended attributes"209 depends on TMPFS210 default n211 help212 Extended attributes are name:value pairs associated with inodes by213 the kernel or by users (see the attr(5) manual page for details).214 215 This enables support for the trusted.*, security.* and user.*216 namespaces.217 218 You need this for POSIX ACL support on tmpfs.219 220 If unsure, say N.221 222config TMPFS_INODE64223 bool "Use 64-bit ino_t by default in tmpfs"224 depends on TMPFS && 64BIT225 default n226 help227 tmpfs has historically used only inode numbers as wide as an unsigned228 int. In some cases this can cause wraparound, potentially resulting229 in multiple files with the same inode number on a single device. This230 option makes tmpfs use the full width of ino_t by default, without231 needing to specify the inode64 option when mounting.232 233 But if a long-lived tmpfs is to be accessed by 32-bit applications so234 ancient that opening a file larger than 2GiB fails with EINVAL, then235 the INODE64 config option and inode64 mount option risk operations236 failing with EOVERFLOW once 33-bit inode numbers are reached.237 238 To override this configured default, use the inode32 or inode64239 option when mounting.240 241 If unsure, say N.242 243config TMPFS_QUOTA244 bool "Tmpfs quota support"245 depends on TMPFS246 select QUOTA247 help248 Quota support allows to set per user and group limits for tmpfs249 usage. Say Y to enable quota support. Once enabled you can control250 user and group quota enforcement with quota, usrquota and grpquota251 mount options.252 253 If unsure, say N.254 255config ARCH_SUPPORTS_HUGETLBFS256 def_bool n257 258menuconfig HUGETLBFS259 bool "HugeTLB file system support"260 depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN261 depends on (SYSFS || SYSCTL)262 select MEMFD_CREATE263 select PADATA if SMP264 help265 hugetlbfs is a filesystem backing for HugeTLB pages, based on266 ramfs. For architectures that support it, say Y here and read267 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.268 269 If unsure, say N.270 271if HUGETLBFS272config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON273 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"274 default n275 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP276 help277 The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to278 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off279 (boot command line) or hugetlb_optimize_vmemmap (sysctl).280endif # HUGETLBFS281 282config HUGETLB_PAGE283 def_bool HUGETLBFS284 select XARRAY_MULTI285 286config HUGETLB_PAGE_OPTIMIZE_VMEMMAP287 def_bool HUGETLB_PAGE288 depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP289 depends on SPARSEMEM_VMEMMAP290 291config HUGETLB_PMD_PAGE_TABLE_SHARING292 def_bool HUGETLB_PAGE293 depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS294 295config ARCH_HAS_GIGANTIC_PAGE296 bool297 298source "fs/configfs/Kconfig"299source "fs/efivarfs/Kconfig"300 301endmenu302 303menuconfig MISC_FILESYSTEMS304 bool "Miscellaneous filesystems"305 default y306 help307 Say Y here to get to see options for various miscellaneous308 filesystems, such as filesystems that came from other309 operating systems.310 311 This option alone does not add any kernel code.312 313 If you say N, all options in this submenu will be skipped and314 disabled; if unsure, say Y here.315 316if MISC_FILESYSTEMS317 318source "fs/orangefs/Kconfig"319source "fs/adfs/Kconfig"320source "fs/affs/Kconfig"321source "fs/ecryptfs/Kconfig"322source "fs/hfs/Kconfig"323source "fs/hfsplus/Kconfig"324source "fs/befs/Kconfig"325source "fs/bfs/Kconfig"326source "fs/efs/Kconfig"327source "fs/jffs2/Kconfig"328# UBIFS File system configuration329source "fs/ubifs/Kconfig"330source "fs/cramfs/Kconfig"331source "fs/squashfs/Kconfig"332source "fs/freevxfs/Kconfig"333source "fs/minix/Kconfig"334source "fs/omfs/Kconfig"335source "fs/hpfs/Kconfig"336source "fs/qnx4/Kconfig"337source "fs/qnx6/Kconfig"338source "fs/romfs/Kconfig"339source "fs/pstore/Kconfig"340source "fs/sysv/Kconfig"341source "fs/ufs/Kconfig"342source "fs/erofs/Kconfig"343source "fs/vboxsf/Kconfig"344 345endif # MISC_FILESYSTEMS346 347menuconfig NETWORK_FILESYSTEMS348 bool "Network File Systems"349 default y350 depends on NET351 help352 Say Y here to get to see options for network filesystems and353 filesystem-related networking code, such as NFS daemon and354 RPCSEC security modules.355 356 This option alone does not add any kernel code.357 358 If you say N, all options in this submenu will be skipped and359 disabled; if unsure, say Y here.360 361if NETWORK_FILESYSTEMS362 363source "fs/nfs/Kconfig"364source "fs/nfsd/Kconfig"365 366config GRACE_PERIOD367 tristate368 369config LOCKD370 tristate371 depends on FILE_LOCKING372 select GRACE_PERIOD373 374config LOCKD_V4375 bool376 depends on NFSD || NFS_V3377 depends on FILE_LOCKING378 default y379 380config NFS_ACL_SUPPORT381 tristate382 select FS_POSIX_ACL383 384config NFS_COMMON385 bool386 depends on NFSD || NFS_FS || LOCKD387 default y388 389config NFS_COMMON_LOCALIO_SUPPORT390 tristate391 depends on NFS_LOCALIO392 default y if NFSD=y || NFS_FS=y393 default m if NFSD=m && NFS_FS=m394 select SUNRPC395 396config NFS_LOCALIO397 bool "NFS client and server support for LOCALIO auxiliary protocol"398 depends on NFSD && NFS_FS399 select NFS_COMMON_LOCALIO_SUPPORT400 default n401 help402 Some NFS servers support an auxiliary NFS LOCALIO protocol403 that is not an official part of the NFS protocol.404 405 This option enables support for the LOCALIO protocol in the406 kernel's NFS server and client. Enable this to permit local407 NFS clients to bypass the network when issuing reads and408 writes to the local NFS server.409 410 If unsure, say N.411 412config NFS_V4_2_SSC_HELPER413 bool414 default y if NFS_V4_2415 416source "net/sunrpc/Kconfig"417source "fs/ceph/Kconfig"418 419source "fs/smb/Kconfig"420source "fs/coda/Kconfig"421source "fs/afs/Kconfig"422source "fs/9p/Kconfig"423 424endif # NETWORK_FILESYSTEMS425 426source "fs/nls/Kconfig"427source "fs/dlm/Kconfig"428source "fs/unicode/Kconfig"429 430config IO_WQ431 bool432 433endmenu434