linux-imx/fs/Kconfig

SPDX-License-Identifier: GPL-2.0-only

File system configuration

menu "File systems"

Use unaligned word dcache accesses

config 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.

if BLOCK

config FS_IOMAP bool

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/reiserfs/Kconfig" 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"

config FS_DAX bool "Direct Access (DAX) support" depends on MMU depends on !(ARM || MIPS || SPARC) select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED) 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; you will need to mount the filesystem using the -o dax option.

  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

Selected by DAX drivers that do not expect filesystem DAX to support

get_user_pages() of DAX mappings. I.e. "limited" indicates no support

for fork() of processes with MAP_SHARED mappings or support for

direct-I/O to a DAX mapping.

config FS_DAX_LIMITED bool

endif # BLOCK

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.

config MANDATORY_FILE_LOCKING bool "Enable Mandatory file locking" depends on FILE_LOCKING default y help This option enables files appropriately marked files on appropriely mounted filesystems to support mandatory locking.

  To the best of my knowledge this is dead code that no one cares about.

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/fscache/Kconfig" source "fs/cachefiles/Kconfig"

endmenu

if BLOCK menu "CD-ROM/DVD Filesystems"

source "fs/isofs/Kconfig" source "fs/udf/Kconfig"

endmenu endif # BLOCK

if BLOCK menu "DOS/FAT/EXFAT/NT Filesystems"

source "fs/fat/Kconfig" source "fs/exfat/Kconfig" source "fs/ntfs/Kconfig"

endmenu endif # 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 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.txt> 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).

  Currently this enables support for the trusted.* and
  security.* namespaces.

  You need this for POSIX ACL support on tmpfs.

  If unsure, say N.

config HUGETLBFS bool "HugeTLB file system support" depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) ||
SYS_SUPPORTS_HUGETLBFS || BROKEN 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.

config HUGETLB_PAGE def_bool HUGETLBFS

config MEMFD_CREATE def_bool TMPFS || HUGETLBFS

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/efs/Kconfig" source "fs/jffs2/Kconfig"

UBIFS File system configuration

source "fs/ubifs/Kconfig" source "fs/cramfs/Kconfig" source "fs/squashfs/Kconfig" source "fs/freevxfs/Kconfig" source "fs/minix/Kconfig" source "fs/omfs/Kconfig" source "fs/hpfs/Kconfig" source "fs/qnx4/Kconfig" source "fs/qnx6/Kconfig" source "fs/romfs/Kconfig" source "fs/pstore/Kconfig" source "fs/sysv/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 GRACE_PERIOD

config LOCKD_V4 bool depends on NFSD_V3 || 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

source "net/sunrpc/Kconfig" source "fs/ceph/Kconfig" source "fs/cifs/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