| # 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. |
| |
| config FS_IOMAP |
| bool |
| |
| # Stackable filesystems |
| config FS_STACK |
| bool |
| |
| config BUFFER_HEAD |
| bool |
| |
| # old blockdev_direct_IO implementation. Use iomap for new code instead |
| config 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/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/bcachefs/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 || 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. |
| |
| 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 |
| |
| # 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 |
| |
| # 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 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/ntfs3/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 |
| 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 X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN |
| depends on (SYSFS || SYSCTL) |
| 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 HUGETLBFS |
| config 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 |
| |
| 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/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 || 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 |
| default n |
| 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 |
