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"
45 bool "Direct Access (DAX) support"
47 depends on !(ARM || MIPS || SPARC)
48 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
52 Direct Access (DAX) can be used on memory-backed block devices.
53 If the block device supports DAX and the filesystem supports DAX,
54 then you can avoid using the pagecache to buffer I/Os. Turning
55 on this option will compile in support for DAX; you will need to
56 mount the filesystem using the -o dax option.
58 If you do not have a block device that is capable of using this,
59 or if unsure, say N. Saying Y will increase the size of the kernel
66 depends on ZONE_DEVICE
67 depends on TRANSPARENT_HUGEPAGE
69 # Selected by DAX drivers that do not expect filesystem DAX to support
70 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
71 # for fork() of processes with MAP_SHARED mappings or support for
72 # direct-I/O to a DAX mapping.
78 # Posix ACL utility routines
80 # Note: Posix ACLs can be implemented without these helpers. Never use
81 # this symbol for ifdefs in core code.
89 config EXPORTFS_BLOCK_OPS
90 bool "Enable filesystem export operations for block IO"
92 This option enables the export operations for a filesystem to support
96 bool "Enable POSIX file locking API" if EXPERT
99 This option enables standard file locking support, required
100 for filesystems like NFS and for the flock() system
101 call. Disabling this option saves about 11k.
103 config MANDATORY_FILE_LOCKING
104 bool "Enable Mandatory file locking"
105 depends on FILE_LOCKING
108 This option enables files appropriately marked files on appropriely
109 mounted filesystems to support mandatory locking.
111 To the best of my knowledge this is dead code that no one cares about.
113 source "fs/crypto/Kconfig"
115 source "fs/verity/Kconfig"
117 source "fs/notify/Kconfig"
119 source "fs/quota/Kconfig"
121 source "fs/autofs/Kconfig"
122 source "fs/fuse/Kconfig"
123 source "fs/overlayfs/Kconfig"
126 tristate "UID/GID shifting overlay filesystem for containers"
128 This filesystem can overlay any mounted filesystem and shift
129 the uid/gid the files appear at. The idea is that
130 unprivileged containers can use this to mount root volumes
131 using this technique.
133 config SHIFT_FS_POSIX_ACL
134 bool "shiftfs POSIX Access Control Lists"
138 POSIX Access Control Lists (ACLs) support permissions for users and
139 groups beyond the owner/group/world scheme.
141 If you don't know what Access Control Lists are, say N.
145 source "fs/fscache/Kconfig"
146 source "fs/cachefiles/Kconfig"
151 menu "CD-ROM/DVD Filesystems"
153 source "fs/isofs/Kconfig"
154 source "fs/udf/Kconfig"
160 menu "DOS/FAT/NT Filesystems"
162 source "fs/fat/Kconfig"
163 source "fs/ntfs/Kconfig"
168 menu "Pseudo filesystems"
170 source "fs/proc/Kconfig"
171 source "fs/kernfs/Kconfig"
172 source "fs/sysfs/Kconfig"
175 bool "Tmpfs virtual memory file system support (former shm fs)"
178 Tmpfs is a file system which keeps all files in virtual memory.
180 Everything in tmpfs is temporary in the sense that no files will be
181 created on your hard drive. The files live in memory and swap
182 space. If you unmount a tmpfs instance, everything stored therein is
185 See <file:Documentation/filesystems/tmpfs.txt> for details.
187 config TMPFS_POSIX_ACL
188 bool "Tmpfs POSIX Access Control Lists"
193 POSIX Access Control Lists (ACLs) support additional access rights
194 for users and groups beyond the standard owner/group/world scheme,
195 and this option selects support for ACLs specifically for tmpfs
198 If you've selected TMPFS, it's possible that you'll also need
199 this option as there are a number of Linux distros that require
200 POSIX ACL support under /dev for certain features to work properly.
201 For example, some distros need this feature for ALSA-related /dev
202 files for sound to work properly. In short, if you're not sure,
206 bool "Tmpfs extended attributes"
210 Extended attributes are name:value pairs associated with inodes by
211 the kernel or by users (see the attr(5) manual page for details).
213 Currently this enables support for the trusted.* and
214 security.* namespaces.
216 You need this for POSIX ACL support on tmpfs.
221 bool "HugeTLB file system support"
222 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
223 SYS_SUPPORTS_HUGETLBFS || BROKEN
225 hugetlbfs is a filesystem backing for HugeTLB pages, based on
226 ramfs. For architectures that support it, say Y here and read
227 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
235 def_bool TMPFS || HUGETLBFS
237 config ARCH_HAS_GIGANTIC_PAGE
240 source "fs/configfs/Kconfig"
241 source "fs/efivarfs/Kconfig"
245 menuconfig MISC_FILESYSTEMS
246 bool "Miscellaneous filesystems"
249 Say Y here to get to see options for various miscellaneous
250 filesystems, such as filesystems that came from other
253 This option alone does not add any kernel code.
255 If you say N, all options in this submenu will be skipped and
256 disabled; if unsure, say Y here.
260 source "fs/orangefs/Kconfig"
261 source "fs/adfs/Kconfig"
262 source "fs/affs/Kconfig"
263 source "fs/ecryptfs/Kconfig"
264 source "fs/hfs/Kconfig"
265 source "fs/hfsplus/Kconfig"
266 source "fs/befs/Kconfig"
267 source "fs/bfs/Kconfig"
268 source "fs/efs/Kconfig"
269 source "fs/jffs2/Kconfig"
270 # UBIFS File system configuration
271 source "fs/ubifs/Kconfig"
272 source "fs/cramfs/Kconfig"
273 source "fs/squashfs/Kconfig"
274 source "fs/freevxfs/Kconfig"
275 source "fs/minix/Kconfig"
276 source "fs/omfs/Kconfig"
277 source "fs/hpfs/Kconfig"
278 source "fs/qnx4/Kconfig"
279 source "fs/qnx6/Kconfig"
280 source "fs/romfs/Kconfig"
281 source "fs/pstore/Kconfig"
282 source "fs/sysv/Kconfig"
283 source "fs/ufs/Kconfig"
284 source "fs/erofs/Kconfig"
285 source "fs/aufs/Kconfig"
287 endif # MISC_FILESYSTEMS
289 menuconfig NETWORK_FILESYSTEMS
290 bool "Network File Systems"
294 Say Y here to get to see options for network filesystems and
295 filesystem-related networking code, such as NFS daemon and
296 RPCSEC security modules.
298 This option alone does not add any kernel code.
300 If you say N, all options in this submenu will be skipped and
301 disabled; if unsure, say Y here.
303 if NETWORK_FILESYSTEMS
305 source "fs/nfs/Kconfig"
306 source "fs/nfsd/Kconfig"
313 depends on FILE_LOCKING
318 depends on NFSD_V3 || NFS_V3
319 depends on FILE_LOCKING
322 config NFS_ACL_SUPPORT
328 depends on NFSD || NFS_FS || LOCKD
331 source "net/sunrpc/Kconfig"
332 source "fs/ceph/Kconfig"
333 source "fs/cifs/Kconfig"
334 source "fs/coda/Kconfig"
335 source "fs/afs/Kconfig"
336 source "fs/9p/Kconfig"
338 endif # NETWORK_FILESYSTEMS
340 source "fs/nls/Kconfig"
341 source "fs/dlm/Kconfig"
342 source "fs/unicode/Kconfig"