1 # SPDX-License-Identifier: GPL-2.0-only
3 # File system configuration
8 # Use unaligned word dcache accesses
9 config DCACHE_WORD_ACCESS
12 config VALIDATE_FS_PARSER
13 bool "Validate filesystem parameter description"
15 Enable this to perform validation of the parameter description for a
16 filesystem when it is registered.
23 source "fs/ext2/Kconfig"
24 source "fs/ext4/Kconfig"
25 source "fs/jbd2/Kconfig"
28 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
30 default y if EXT2_FS=y && EXT2_FS_XATTR
31 default y if EXT4_FS=y
32 default m if EXT2_FS_XATTR || EXT4_FS
34 source "fs/reiserfs/Kconfig"
35 source "fs/jfs/Kconfig"
37 source "fs/xfs/Kconfig"
38 source "fs/gfs2/Kconfig"
39 source "fs/ocfs2/Kconfig"
40 source "fs/btrfs/Kconfig"
41 source "fs/nilfs2/Kconfig"
42 source "fs/f2fs/Kconfig"
43 source "fs/zonefs/Kconfig"
46 bool "Direct Access (DAX) support"
48 depends on !(ARM || MIPS || SPARC)
49 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
53 Direct Access (DAX) can be used on memory-backed block devices.
54 If the block device supports DAX and the filesystem supports DAX,
55 then you can avoid using the pagecache to buffer I/Os. Turning
56 on this option will compile in support for DAX; you will need to
57 mount the filesystem using the -o dax option.
59 If you do not have a block device that is capable of using this,
60 or if unsure, say N. Saying Y will increase the size of the kernel
67 depends on ZONE_DEVICE
68 depends on TRANSPARENT_HUGEPAGE
70 # Selected by DAX drivers that do not expect filesystem DAX to support
71 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
72 # for fork() of processes with MAP_SHARED mappings or support for
73 # direct-I/O to a DAX mapping.
79 # Posix ACL utility routines
81 # Note: Posix ACLs can be implemented without these helpers. Never use
82 # this symbol for ifdefs in core code.
90 config EXPORTFS_BLOCK_OPS
91 bool "Enable filesystem export operations for block IO"
93 This option enables the export operations for a filesystem to support
97 bool "Enable POSIX file locking API" if EXPERT
100 This option enables standard file locking support, required
101 for filesystems like NFS and for the flock() system
102 call. Disabling this option saves about 11k.
104 source "fs/crypto/Kconfig"
106 source "fs/verity/Kconfig"
108 source "fs/notify/Kconfig"
110 source "fs/quota/Kconfig"
112 source "fs/autofs/Kconfig"
113 source "fs/fuse/Kconfig"
114 source "fs/overlayfs/Kconfig"
118 source "fs/netfs/Kconfig"
119 source "fs/fscache/Kconfig"
120 source "fs/cachefiles/Kconfig"
125 menu "CD-ROM/DVD Filesystems"
127 source "fs/isofs/Kconfig"
128 source "fs/udf/Kconfig"
134 menu "DOS/FAT/EXFAT/NT Filesystems"
136 source "fs/fat/Kconfig"
137 source "fs/exfat/Kconfig"
138 source "fs/ntfs/Kconfig"
143 menu "Pseudo filesystems"
145 source "fs/proc/Kconfig"
146 source "fs/kernfs/Kconfig"
147 source "fs/sysfs/Kconfig"
150 bool "Tmpfs virtual memory file system support (former shm fs)"
153 Tmpfs is a file system which keeps all files in virtual memory.
155 Everything in tmpfs is temporary in the sense that no files will be
156 created on your hard drive. The files live in memory and swap
157 space. If you unmount a tmpfs instance, everything stored therein is
160 See <file:Documentation/filesystems/tmpfs.rst> for details.
162 config TMPFS_POSIX_ACL
163 bool "Tmpfs POSIX Access Control Lists"
168 POSIX Access Control Lists (ACLs) support additional access rights
169 for users and groups beyond the standard owner/group/world scheme,
170 and this option selects support for ACLs specifically for tmpfs
173 If you've selected TMPFS, it's possible that you'll also need
174 this option as there are a number of Linux distros that require
175 POSIX ACL support under /dev for certain features to work properly.
176 For example, some distros need this feature for ALSA-related /dev
177 files for sound to work properly. In short, if you're not sure,
181 bool "Tmpfs extended attributes"
185 Extended attributes are name:value pairs associated with inodes by
186 the kernel or by users (see the attr(5) manual page for details).
188 Currently this enables support for the trusted.* and
189 security.* namespaces.
191 You need this for POSIX ACL support on tmpfs.
196 bool "Use 64-bit ino_t by default in tmpfs"
197 depends on TMPFS && 64BIT
200 tmpfs has historically used only inode numbers as wide as an unsigned
201 int. In some cases this can cause wraparound, potentially resulting
202 in multiple files with the same inode number on a single device. This
203 option makes tmpfs use the full width of ino_t by default, without
204 needing to specify the inode64 option when mounting.
206 But if a long-lived tmpfs is to be accessed by 32-bit applications so
207 ancient that opening a file larger than 2GiB fails with EINVAL, then
208 the INODE64 config option and inode64 mount option risk operations
209 failing with EOVERFLOW once 33-bit inode numbers are reached.
211 To override this configured default, use the inode32 or inode64
212 option when mounting.
216 config ARCH_SUPPORTS_HUGETLBFS
220 bool "HugeTLB file system support"
221 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
222 ARCH_SUPPORTS_HUGETLBFS || BROKEN
224 hugetlbfs is a filesystem backing for HugeTLB pages, based on
225 ramfs. For architectures that support it, say Y here and read
226 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
233 config HUGETLB_PAGE_FREE_VMEMMAP
234 def_bool HUGETLB_PAGE
236 depends on SPARSEMEM_VMEMMAP
238 config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
239 bool "Default freeing vmemmap pages of HugeTLB to on"
241 depends on HUGETLB_PAGE_FREE_VMEMMAP
243 When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
244 pages associated with each HugeTLB page is default off. Say Y here
245 to enable freeing vmemmap pages of HugeTLB by default. It can then
246 be disabled on the command line via hugetlb_free_vmemmap=off.
249 def_bool TMPFS || HUGETLBFS
251 config ARCH_HAS_GIGANTIC_PAGE
254 source "fs/configfs/Kconfig"
255 source "fs/efivarfs/Kconfig"
259 menuconfig MISC_FILESYSTEMS
260 bool "Miscellaneous filesystems"
263 Say Y here to get to see options for various miscellaneous
264 filesystems, such as filesystems that came from other
267 This option alone does not add any kernel code.
269 If you say N, all options in this submenu will be skipped and
270 disabled; if unsure, say Y here.
274 source "fs/orangefs/Kconfig"
275 source "fs/adfs/Kconfig"
276 source "fs/affs/Kconfig"
277 source "fs/ecryptfs/Kconfig"
278 source "fs/hfs/Kconfig"
279 source "fs/hfsplus/Kconfig"
280 source "fs/befs/Kconfig"
281 source "fs/bfs/Kconfig"
282 source "fs/efs/Kconfig"
283 source "fs/jffs2/Kconfig"
284 # UBIFS File system configuration
285 source "fs/ubifs/Kconfig"
286 source "fs/cramfs/Kconfig"
287 source "fs/squashfs/Kconfig"
288 source "fs/freevxfs/Kconfig"
289 source "fs/minix/Kconfig"
290 source "fs/omfs/Kconfig"
291 source "fs/hpfs/Kconfig"
292 source "fs/qnx4/Kconfig"
293 source "fs/qnx6/Kconfig"
294 source "fs/romfs/Kconfig"
295 source "fs/pstore/Kconfig"
296 source "fs/sysv/Kconfig"
297 source "fs/ufs/Kconfig"
298 source "fs/erofs/Kconfig"
299 source "fs/vboxsf/Kconfig"
301 endif # MISC_FILESYSTEMS
303 menuconfig NETWORK_FILESYSTEMS
304 bool "Network File Systems"
308 Say Y here to get to see options for network filesystems and
309 filesystem-related networking code, such as NFS daemon and
310 RPCSEC security modules.
312 This option alone does not add any kernel code.
314 If you say N, all options in this submenu will be skipped and
315 disabled; if unsure, say Y here.
317 if NETWORK_FILESYSTEMS
319 source "fs/nfs/Kconfig"
320 source "fs/nfsd/Kconfig"
327 depends on FILE_LOCKING
332 depends on NFSD_V3 || NFS_V3
333 depends on FILE_LOCKING
336 config NFS_ACL_SUPPORT
342 depends on NFSD || NFS_FS || LOCKD
345 config NFS_V4_2_SSC_HELPER
347 default y if NFS_V4_2
349 source "net/sunrpc/Kconfig"
350 source "fs/ceph/Kconfig"
352 source "fs/cifs/Kconfig"
353 source "fs/ksmbd/Kconfig"
360 source "fs/coda/Kconfig"
361 source "fs/afs/Kconfig"
362 source "fs/9p/Kconfig"
364 endif # NETWORK_FILESYSTEMS
366 source "fs/nls/Kconfig"
367 source "fs/dlm/Kconfig"
368 source "fs/unicode/Kconfig"