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 config MANDATORY_FILE_LOCKING
105 bool "Enable Mandatory file locking"
106 depends on FILE_LOCKING
109 This option enables files appropriately marked files on appropriely
110 mounted filesystems to support mandatory locking.
112 To the best of my knowledge this is dead code that no one cares about.
114 source "fs/crypto/Kconfig"
116 source "fs/verity/Kconfig"
118 source "fs/notify/Kconfig"
120 source "fs/quota/Kconfig"
122 source "fs/autofs/Kconfig"
123 source "fs/fuse/Kconfig"
124 source "fs/overlayfs/Kconfig"
128 source "fs/netfs/Kconfig"
129 source "fs/fscache/Kconfig"
130 source "fs/cachefiles/Kconfig"
135 menu "CD-ROM/DVD Filesystems"
137 source "fs/isofs/Kconfig"
138 source "fs/udf/Kconfig"
144 menu "DOS/FAT/EXFAT/NT Filesystems"
146 source "fs/fat/Kconfig"
147 source "fs/exfat/Kconfig"
148 source "fs/ntfs/Kconfig"
153 menu "Pseudo filesystems"
155 source "fs/proc/Kconfig"
156 source "fs/kernfs/Kconfig"
157 source "fs/sysfs/Kconfig"
160 bool "Tmpfs virtual memory file system support (former shm fs)"
163 Tmpfs is a file system which keeps all files in virtual memory.
165 Everything in tmpfs is temporary in the sense that no files will be
166 created on your hard drive. The files live in memory and swap
167 space. If you unmount a tmpfs instance, everything stored therein is
170 See <file:Documentation/filesystems/tmpfs.rst> for details.
172 config TMPFS_POSIX_ACL
173 bool "Tmpfs POSIX Access Control Lists"
178 POSIX Access Control Lists (ACLs) support additional access rights
179 for users and groups beyond the standard owner/group/world scheme,
180 and this option selects support for ACLs specifically for tmpfs
183 If you've selected TMPFS, it's possible that you'll also need
184 this option as there are a number of Linux distros that require
185 POSIX ACL support under /dev for certain features to work properly.
186 For example, some distros need this feature for ALSA-related /dev
187 files for sound to work properly. In short, if you're not sure,
191 bool "Tmpfs extended attributes"
195 Extended attributes are name:value pairs associated with inodes by
196 the kernel or by users (see the attr(5) manual page for details).
198 Currently this enables support for the trusted.* and
199 security.* namespaces.
201 You need this for POSIX ACL support on tmpfs.
206 bool "Use 64-bit ino_t by default in tmpfs"
207 depends on TMPFS && 64BIT
210 tmpfs has historically used only inode numbers as wide as an unsigned
211 int. In some cases this can cause wraparound, potentially resulting
212 in multiple files with the same inode number on a single device. This
213 option makes tmpfs use the full width of ino_t by default, without
214 needing to specify the inode64 option when mounting.
216 But if a long-lived tmpfs is to be accessed by 32-bit applications so
217 ancient that opening a file larger than 2GiB fails with EINVAL, then
218 the INODE64 config option and inode64 mount option risk operations
219 failing with EOVERFLOW once 33-bit inode numbers are reached.
221 To override this configured default, use the inode32 or inode64
222 option when mounting.
227 bool "HugeTLB file system support"
228 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
229 SYS_SUPPORTS_HUGETLBFS || BROKEN
231 hugetlbfs is a filesystem backing for HugeTLB pages, based on
232 ramfs. For architectures that support it, say Y here and read
233 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
241 def_bool TMPFS || HUGETLBFS
243 config ARCH_HAS_GIGANTIC_PAGE
246 source "fs/configfs/Kconfig"
247 source "fs/efivarfs/Kconfig"
251 menuconfig MISC_FILESYSTEMS
252 bool "Miscellaneous filesystems"
255 Say Y here to get to see options for various miscellaneous
256 filesystems, such as filesystems that came from other
259 This option alone does not add any kernel code.
261 If you say N, all options in this submenu will be skipped and
262 disabled; if unsure, say Y here.
266 source "fs/orangefs/Kconfig"
267 source "fs/adfs/Kconfig"
268 source "fs/affs/Kconfig"
269 source "fs/ecryptfs/Kconfig"
270 source "fs/hfs/Kconfig"
271 source "fs/hfsplus/Kconfig"
272 source "fs/befs/Kconfig"
273 source "fs/bfs/Kconfig"
274 source "fs/efs/Kconfig"
275 source "fs/jffs2/Kconfig"
276 # UBIFS File system configuration
277 source "fs/ubifs/Kconfig"
278 source "fs/cramfs/Kconfig"
279 source "fs/squashfs/Kconfig"
280 source "fs/freevxfs/Kconfig"
281 source "fs/minix/Kconfig"
282 source "fs/omfs/Kconfig"
283 source "fs/hpfs/Kconfig"
284 source "fs/qnx4/Kconfig"
285 source "fs/qnx6/Kconfig"
286 source "fs/romfs/Kconfig"
287 source "fs/pstore/Kconfig"
288 source "fs/sysv/Kconfig"
289 source "fs/ufs/Kconfig"
290 source "fs/erofs/Kconfig"
291 source "fs/vboxsf/Kconfig"
293 endif # MISC_FILESYSTEMS
295 menuconfig NETWORK_FILESYSTEMS
296 bool "Network File Systems"
300 Say Y here to get to see options for network filesystems and
301 filesystem-related networking code, such as NFS daemon and
302 RPCSEC security modules.
304 This option alone does not add any kernel code.
306 If you say N, all options in this submenu will be skipped and
307 disabled; if unsure, say Y here.
309 if NETWORK_FILESYSTEMS
311 source "fs/nfs/Kconfig"
312 source "fs/nfsd/Kconfig"
319 depends on FILE_LOCKING
324 depends on NFSD_V3 || NFS_V3
325 depends on FILE_LOCKING
328 config NFS_ACL_SUPPORT
334 depends on NFSD || NFS_FS || LOCKD
337 config NFS_V4_2_SSC_HELPER
339 default y if NFS_V4=y || NFS_FS=y
341 source "net/sunrpc/Kconfig"
342 source "fs/ceph/Kconfig"
343 source "fs/cifs/Kconfig"
344 source "fs/coda/Kconfig"
345 source "fs/afs/Kconfig"
346 source "fs/9p/Kconfig"
348 endif # NETWORK_FILESYSTEMS
350 source "fs/nls/Kconfig"
351 source "fs/dlm/Kconfig"
352 source "fs/unicode/Kconfig"