# SPDX-License-Identifier: GPL-2.0-only## File system configuration# menu "File systems" # Use unaligned word dcache accessesconfig DCACHE_WORD_ACCESS       bool config VALIDATE_FS_PARSER	bool "Validate filesystem parameter description"	help	  Enable this to perform validation of the parameter description for a	  filesystem when it is registered. config FS_IOMAP	bool # Stackable filesystemsconfig FS_STACK	bool config BUFFER_HEAD	bool # old blockdev_direct_IO implementation.  Use iomap for new code insteadconfig LEGACY_DIRECT_IO	depends on BUFFER_HEAD	bool if BLOCK source "fs/ext2/Kconfig"source "fs/ext4/Kconfig"source "fs/jbd2/Kconfig" config FS_MBCACHE# Meta block cache for Extended Attributes (ext2/ext3/ext4)	tristate	default y if EXT2_FS=y && EXT2_FS_XATTR	default y if EXT4_FS=y	default m if EXT2_FS_XATTR || EXT4_FS source "fs/jfs/Kconfig" source "fs/xfs/Kconfig"source "fs/gfs2/Kconfig"source "fs/ocfs2/Kconfig"source "fs/btrfs/Kconfig"source "fs/nilfs2/Kconfig"source "fs/f2fs/Kconfig"source "fs/zonefs/Kconfig" endif # BLOCK config FS_DAX	bool "File system based Direct Access (DAX) support"	depends on MMU	depends on ZONE_DEVICE	select FS_IOMAP	select DAX	help	  Direct Access (DAX) can be used on memory-backed block devices.	  If the block device supports DAX and the filesystem supports DAX,	  then you can avoid using the pagecache to buffer I/Os.  Turning	  on this option will compile in support for DAX. 	  For a DAX device to support file system access it needs to have	  struct pages.  For the nfit based NVDIMMs this can be enabled	  using the ndctl utility: 		# ndctl create-namespace --force --reconfig=namespace0.0 \			--mode=fsdax --map=mem 	  See the 'create-namespace' man page for details on the overhead of	  --map=mem:	  https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace 	  For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most	  file systems DAX support needs to be manually enabled globally or	  per-inode using a mount option as well.  See the file documentation in	  Documentation/filesystems/dax.rst for details. 	  If you do not have a block device that is capable of using this,	  or if unsure, say N.  Saying Y will increase the size of the kernel	  by about 5kB. config FS_DAX_PMD	bool	default FS_DAX	depends on FS_DAX	depends on ZONE_DEVICE	depends on TRANSPARENT_HUGEPAGE # Posix ACL utility routines## Note: Posix ACLs can be implemented without these helpers.  Never use# this symbol for ifdefs in core code.#config FS_POSIX_ACL	def_bool n config EXPORTFS	tristate config EXPORTFS_BLOCK_OPS	bool "Enable filesystem export operations for block IO"	help	  This option enables the export operations for a filesystem to support	  external block IO. config FILE_LOCKING	bool "Enable POSIX file locking API" if EXPERT	default y	help	  This option enables standard file locking support, required	  for filesystems like NFS and for the flock() system	  call. Disabling this option saves about 11k. source "fs/crypto/Kconfig" source "fs/verity/Kconfig" source "fs/notify/Kconfig" source "fs/quota/Kconfig" source "fs/autofs/Kconfig"source "fs/fuse/Kconfig"source "fs/overlayfs/Kconfig" menu "Caches" source "fs/netfs/Kconfig"source "fs/cachefiles/Kconfig" endmenu if BLOCKmenu "CD-ROM/DVD Filesystems" source "fs/isofs/Kconfig"source "fs/udf/Kconfig" endmenuendif # BLOCK if BLOCKmenu "DOS/FAT/EXFAT/NT Filesystems" source "fs/fat/Kconfig"source "fs/exfat/Kconfig"source "fs/ntfs/Kconfig"source "fs/ntfs3/Kconfig" endmenuendif # BLOCK menu "Pseudo filesystems" source "fs/proc/Kconfig"source "fs/kernfs/Kconfig"source "fs/sysfs/Kconfig" config TMPFS	bool "Tmpfs virtual memory file system support (former shm fs)"	depends on SHMEM	select MEMFD_CREATE	help	  Tmpfs is a file system which keeps all files in virtual memory. 	  Everything in tmpfs is temporary in the sense that no files will be	  created on your hard drive. The files live in memory and swap	  space. If you unmount a tmpfs instance, everything stored therein is	  lost. 	  See <file:Documentation/filesystems/tmpfs.rst> for details. config TMPFS_POSIX_ACL	bool "Tmpfs POSIX Access Control Lists"	depends on TMPFS	select TMPFS_XATTR	select FS_POSIX_ACL	help	  POSIX Access Control Lists (ACLs) support additional access rights	  for users and groups beyond the standard owner/group/world scheme,	  and this option selects support for ACLs specifically for tmpfs	  filesystems. 	  If you've selected TMPFS, it's possible that you'll also need	  this option as there are a number of Linux distros that require	  POSIX ACL support under /dev for certain features to work properly.	  For example, some distros need this feature for ALSA-related /dev	  files for sound to work properly.  In short, if you're not sure,	  say Y. config TMPFS_XATTR	bool "Tmpfs extended attributes"	depends on TMPFS	default n	help	  Extended attributes are name:value pairs associated with inodes by	  the kernel or by users (see the attr(5) manual page for details). 	  This enables support for the trusted.*, security.* and user.*	  namespaces. 	  You need this for POSIX ACL support on tmpfs. 	  If unsure, say N. config TMPFS_INODE64	bool "Use 64-bit ino_t by default in tmpfs"	depends on TMPFS && 64BIT	default n	help	  tmpfs has historically used only inode numbers as wide as an unsigned	  int. In some cases this can cause wraparound, potentially resulting	  in multiple files with the same inode number on a single device. This	  option makes tmpfs use the full width of ino_t by default, without	  needing to specify the inode64 option when mounting. 	  But if a long-lived tmpfs is to be accessed by 32-bit applications so	  ancient that opening a file larger than 2GiB fails with EINVAL, then	  the INODE64 config option and inode64 mount option risk operations	  failing with EOVERFLOW once 33-bit inode numbers are reached. 	  To override this configured default, use the inode32 or inode64	  option when mounting. 	  If unsure, say N. config TMPFS_QUOTA	bool "Tmpfs quota support"	depends on TMPFS	select QUOTA	help	  Quota support allows to set per user and group limits for tmpfs	  usage.  Say Y to enable quota support. Once enabled you can control	  user and group quota enforcement with quota, usrquota and grpquota	  mount options. 	  If unsure, say N. config ARCH_SUPPORTS_HUGETLBFS	def_bool n menuconfig HUGETLBFS	bool "HugeTLB file system support"	depends on ARCH_SUPPORTS_HUGETLBFS	select MEMFD_CREATE	select PADATA if SMP	help	  hugetlbfs is a filesystem backing for HugeTLB pages, based on	  ramfs. For architectures that support it, say Y here and read	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details. 	  If unsure, say N. if HUGETLBFSconfig HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON	bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"	default n	depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP	help	  The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to	  enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off	  (boot command line) or hugetlb_optimize_vmemmap (sysctl).endif # HUGETLBFS config HUGETLB_PAGE	def_bool HUGETLBFS	select XARRAY_MULTI config HUGETLB_PAGE_OPTIMIZE_VMEMMAP	def_bool HUGETLB_PAGE	depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP	depends on SPARSEMEM_VMEMMAP	select SPARSEMEM_VMEMMAP_PREINIT if ARCH_WANT_HUGETLB_VMEMMAP_PREINIT config HUGETLB_PMD_PAGE_TABLE_SHARING	def_bool HUGETLB_PAGE	depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS config ARCH_HAS_GIGANTIC_PAGE	bool source "fs/configfs/Kconfig"source "fs/efivarfs/Kconfig" endmenu menuconfig MISC_FILESYSTEMS	bool "Miscellaneous filesystems"	default y	help	  Say Y here to get to see options for various miscellaneous	  filesystems, such as filesystems that came from other	  operating systems. 	  This option alone does not add any kernel code. 	  If you say N, all options in this submenu will be skipped and	  disabled; if unsure, say Y here. if MISC_FILESYSTEMS source "fs/orangefs/Kconfig"source "fs/adfs/Kconfig"source "fs/affs/Kconfig"source "fs/ecryptfs/Kconfig"source "fs/hfs/Kconfig"source "fs/hfsplus/Kconfig"source "fs/befs/Kconfig"source "fs/bfs/Kconfig"source "fs/jffs2/Kconfig"# UBIFS File system configurationsource "fs/ubifs/Kconfig"source "fs/cramfs/Kconfig"source "fs/squashfs/Kconfig"source "fs/minix/Kconfig"source "fs/omfs/Kconfig"source "fs/hpfs/Kconfig"source "fs/qnx4/Kconfig"source "fs/qnx6/Kconfig"source "fs/resctrl/Kconfig"source "fs/romfs/Kconfig"source "fs/pstore/Kconfig"source "fs/ufs/Kconfig"source "fs/erofs/Kconfig"source "fs/vboxsf/Kconfig" endif # MISC_FILESYSTEMS menuconfig NETWORK_FILESYSTEMS	bool "Network File Systems"	default y	depends on NET	help	  Say Y here to get to see options for network filesystems and	  filesystem-related networking code, such as NFS daemon and	  RPCSEC security modules. 	  This option alone does not add any kernel code. 	  If you say N, all options in this submenu will be skipped and	  disabled; if unsure, say Y here. if NETWORK_FILESYSTEMS source "fs/nfs/Kconfig"source "fs/nfsd/Kconfig" config GRACE_PERIOD	tristate config LOCKD	tristate	depends on FILE_LOCKING	select CRC32	select GRACE_PERIOD config LOCKD_V4	bool	depends on NFSD || NFS_V3	depends on FILE_LOCKING	default y config NFS_ACL_SUPPORT	tristate	select FS_POSIX_ACL config NFS_COMMON	bool	depends on NFSD || NFS_FS || LOCKD	default y config NFS_COMMON_LOCALIO_SUPPORT	tristate	depends on NFS_LOCALIO	default y if NFSD=y || NFS_FS=y	default m if NFSD=m && NFS_FS=m	select SUNRPC config NFS_LOCALIO	bool "NFS client and server support for LOCALIO auxiliary protocol"	depends on NFSD && NFS_FS	select NFS_COMMON_LOCALIO_SUPPORT	default n	help	  Some NFS servers support an auxiliary NFS LOCALIO protocol	  that is not an official part of the NFS protocol. 	  This option enables support for the LOCALIO protocol in the	  kernel's NFS server and client. Enable this to permit local	  NFS clients to bypass the network when issuing reads and	  writes to the local NFS server. 	  If unsure, say N. config NFS_V4_2_SSC_HELPER	bool	default y if NFS_V4_2 source "net/sunrpc/Kconfig"source "fs/ceph/Kconfig" source "fs/smb/Kconfig"source "fs/coda/Kconfig"source "fs/afs/Kconfig"source "fs/9p/Kconfig" endif # NETWORK_FILESYSTEMS source "fs/nls/Kconfig"source "fs/dlm/Kconfig"source "fs/unicode/Kconfig" config IO_WQ	bool endmenu