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/fscache/Kconfig"
129 source "fs/cachefiles/Kconfig"
134 menu "CD-ROM/DVD Filesystems"
136 source "fs/isofs/Kconfig"
137 source "fs/udf/Kconfig"
143 menu "DOS/FAT/EXFAT/NT Filesystems"
145 source "fs/fat/Kconfig"
146 source "fs/exfat/Kconfig"
147 source "fs/ntfs/Kconfig"
152 menu "Pseudo filesystems"
154 source "fs/proc/Kconfig"
155 source "fs/kernfs/Kconfig"
156 source "fs/sysfs/Kconfig"
159 bool "Tmpfs virtual memory file system support (former shm fs)"
162 Tmpfs is a file system which keeps all files in virtual memory.
164 Everything in tmpfs is temporary in the sense that no files will be
165 created on your hard drive. The files live in memory and swap
166 space. If you unmount a tmpfs instance, everything stored therein is
169 See <file:Documentation/filesystems/tmpfs.rst> for details.
171 config TMPFS_POSIX_ACL
172 bool "Tmpfs POSIX Access Control Lists"
177 POSIX Access Control Lists (ACLs) support additional access rights
178 for users and groups beyond the standard owner/group/world scheme,
179 and this option selects support for ACLs specifically for tmpfs
182 If you've selected TMPFS, it's possible that you'll also need
183 this option as there are a number of Linux distros that require
184 POSIX ACL support under /dev for certain features to work properly.
185 For example, some distros need this feature for ALSA-related /dev
186 files for sound to work properly. In short, if you're not sure,
190 bool "Tmpfs extended attributes"
194 Extended attributes are name:value pairs associated with inodes by
195 the kernel or by users (see the attr(5) manual page for details).
197 Currently this enables support for the trusted.* and
198 security.* namespaces.
200 You need this for POSIX ACL support on tmpfs.
205 bool "Use 64-bit ino_t by default in tmpfs"
206 depends on TMPFS && 64BIT
209 tmpfs has historically used only inode numbers as wide as an unsigned
210 int. In some cases this can cause wraparound, potentially resulting
211 in multiple files with the same inode number on a single device. This
212 option makes tmpfs use the full width of ino_t by default, without
213 needing to specify the inode64 option when mounting.
215 But if a long-lived tmpfs is to be accessed by 32-bit applications so
216 ancient that opening a file larger than 2GiB fails with EINVAL, then
217 the INODE64 config option and inode64 mount option risk operations
218 failing with EOVERFLOW once 33-bit inode numbers are reached.
220 To override this configured default, use the inode32 or inode64
221 option when mounting.
226 bool "HugeTLB file system support"
227 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
228 SYS_SUPPORTS_HUGETLBFS || BROKEN
230 hugetlbfs is a filesystem backing for HugeTLB pages, based on
231 ramfs. For architectures that support it, say Y here and read
232 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
240 def_bool TMPFS || HUGETLBFS
242 config ARCH_HAS_GIGANTIC_PAGE
245 source "fs/configfs/Kconfig"
246 source "fs/efivarfs/Kconfig"
250 menuconfig MISC_FILESYSTEMS
251 bool "Miscellaneous filesystems"
254 Say Y here to get to see options for various miscellaneous
255 filesystems, such as filesystems that came from other
258 This option alone does not add any kernel code.
260 If you say N, all options in this submenu will be skipped and
261 disabled; if unsure, say Y here.
265 source "fs/orangefs/Kconfig"
266 source "fs/adfs/Kconfig"
267 source "fs/affs/Kconfig"
268 source "fs/ecryptfs/Kconfig"
269 source "fs/hfs/Kconfig"
270 source "fs/hfsplus/Kconfig"
271 source "fs/befs/Kconfig"
272 source "fs/bfs/Kconfig"
273 source "fs/efs/Kconfig"
274 source "fs/jffs2/Kconfig"
275 # UBIFS File system configuration
276 source "fs/ubifs/Kconfig"
277 source "fs/cramfs/Kconfig"
278 source "fs/squashfs/Kconfig"
279 source "fs/freevxfs/Kconfig"
280 source "fs/minix/Kconfig"
281 source "fs/omfs/Kconfig"
282 source "fs/hpfs/Kconfig"
283 source "fs/qnx4/Kconfig"
284 source "fs/qnx6/Kconfig"
285 source "fs/romfs/Kconfig"
286 source "fs/pstore/Kconfig"
287 source "fs/sysv/Kconfig"
288 source "fs/ufs/Kconfig"
289 source "fs/erofs/Kconfig"
290 source "fs/vboxsf/Kconfig"
292 endif # MISC_FILESYSTEMS
294 menuconfig NETWORK_FILESYSTEMS
295 bool "Network File Systems"
299 Say Y here to get to see options for network filesystems and
300 filesystem-related networking code, such as NFS daemon and
301 RPCSEC security modules.
303 This option alone does not add any kernel code.
305 If you say N, all options in this submenu will be skipped and
306 disabled; if unsure, say Y here.
308 if NETWORK_FILESYSTEMS
310 source "fs/nfs/Kconfig"
311 source "fs/nfsd/Kconfig"
318 depends on FILE_LOCKING
323 depends on NFSD_V3 || NFS_V3
324 depends on FILE_LOCKING
327 config NFS_ACL_SUPPORT
333 depends on NFSD || NFS_FS || LOCKD
336 source "net/sunrpc/Kconfig"
337 source "fs/ceph/Kconfig"
338 source "fs/cifs/Kconfig"
339 source "fs/coda/Kconfig"
340 source "fs/afs/Kconfig"
341 source "fs/9p/Kconfig"
343 endif # NETWORK_FILESYSTEMS
345 source "fs/nls/Kconfig"
346 source "fs/dlm/Kconfig"
347 source "fs/unicode/Kconfig"