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"
139 source "fs/ntfs3/Kconfig"
144 menu "Pseudo filesystems"
146 source "fs/proc/Kconfig"
147 source "fs/kernfs/Kconfig"
148 source "fs/sysfs/Kconfig"
151 bool "Tmpfs virtual memory file system support (former shm fs)"
154 Tmpfs is a file system which keeps all files in virtual memory.
156 Everything in tmpfs is temporary in the sense that no files will be
157 created on your hard drive. The files live in memory and swap
158 space. If you unmount a tmpfs instance, everything stored therein is
161 See <file:Documentation/filesystems/tmpfs.rst> for details.
163 config TMPFS_POSIX_ACL
164 bool "Tmpfs POSIX Access Control Lists"
169 POSIX Access Control Lists (ACLs) support additional access rights
170 for users and groups beyond the standard owner/group/world scheme,
171 and this option selects support for ACLs specifically for tmpfs
174 If you've selected TMPFS, it's possible that you'll also need
175 this option as there are a number of Linux distros that require
176 POSIX ACL support under /dev for certain features to work properly.
177 For example, some distros need this feature for ALSA-related /dev
178 files for sound to work properly. In short, if you're not sure,
182 bool "Tmpfs extended attributes"
186 Extended attributes are name:value pairs associated with inodes by
187 the kernel or by users (see the attr(5) manual page for details).
189 Currently this enables support for the trusted.* and
190 security.* namespaces.
192 You need this for POSIX ACL support on tmpfs.
197 bool "Use 64-bit ino_t by default in tmpfs"
198 depends on TMPFS && 64BIT
201 tmpfs has historically used only inode numbers as wide as an unsigned
202 int. In some cases this can cause wraparound, potentially resulting
203 in multiple files with the same inode number on a single device. This
204 option makes tmpfs use the full width of ino_t by default, without
205 needing to specify the inode64 option when mounting.
207 But if a long-lived tmpfs is to be accessed by 32-bit applications so
208 ancient that opening a file larger than 2GiB fails with EINVAL, then
209 the INODE64 config option and inode64 mount option risk operations
210 failing with EOVERFLOW once 33-bit inode numbers are reached.
212 To override this configured default, use the inode32 or inode64
213 option when mounting.
217 config ARCH_SUPPORTS_HUGETLBFS
221 bool "HugeTLB file system support"
222 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
223 ARCH_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.
234 config HUGETLB_PAGE_FREE_VMEMMAP
235 def_bool HUGETLB_PAGE
237 depends on SPARSEMEM_VMEMMAP
239 config HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
240 bool "Default freeing vmemmap pages of HugeTLB to on"
242 depends on HUGETLB_PAGE_FREE_VMEMMAP
244 When using HUGETLB_PAGE_FREE_VMEMMAP, the freeing unused vmemmap
245 pages associated with each HugeTLB page is default off. Say Y here
246 to enable freeing vmemmap pages of HugeTLB by default. It can then
247 be disabled on the command line via hugetlb_free_vmemmap=off.
250 def_bool TMPFS || HUGETLBFS
252 config ARCH_HAS_GIGANTIC_PAGE
255 source "fs/configfs/Kconfig"
256 source "fs/efivarfs/Kconfig"
260 menuconfig MISC_FILESYSTEMS
261 bool "Miscellaneous filesystems"
264 Say Y here to get to see options for various miscellaneous
265 filesystems, such as filesystems that came from other
268 This option alone does not add any kernel code.
270 If you say N, all options in this submenu will be skipped and
271 disabled; if unsure, say Y here.
275 source "fs/orangefs/Kconfig"
276 source "fs/adfs/Kconfig"
277 source "fs/affs/Kconfig"
278 source "fs/ecryptfs/Kconfig"
279 source "fs/hfs/Kconfig"
280 source "fs/hfsplus/Kconfig"
281 source "fs/befs/Kconfig"
282 source "fs/bfs/Kconfig"
283 source "fs/efs/Kconfig"
284 source "fs/jffs2/Kconfig"
285 # UBIFS File system configuration
286 source "fs/ubifs/Kconfig"
287 source "fs/cramfs/Kconfig"
288 source "fs/squashfs/Kconfig"
289 source "fs/freevxfs/Kconfig"
290 source "fs/minix/Kconfig"
291 source "fs/omfs/Kconfig"
292 source "fs/hpfs/Kconfig"
293 source "fs/qnx4/Kconfig"
294 source "fs/qnx6/Kconfig"
295 source "fs/romfs/Kconfig"
296 source "fs/pstore/Kconfig"
297 source "fs/sysv/Kconfig"
298 source "fs/ufs/Kconfig"
299 source "fs/erofs/Kconfig"
300 source "fs/vboxsf/Kconfig"
302 endif # MISC_FILESYSTEMS
304 menuconfig NETWORK_FILESYSTEMS
305 bool "Network File Systems"
309 Say Y here to get to see options for network filesystems and
310 filesystem-related networking code, such as NFS daemon and
311 RPCSEC security modules.
313 This option alone does not add any kernel code.
315 If you say N, all options in this submenu will be skipped and
316 disabled; if unsure, say Y here.
318 if NETWORK_FILESYSTEMS
320 source "fs/nfs/Kconfig"
321 source "fs/nfsd/Kconfig"
328 depends on FILE_LOCKING
333 depends on NFSD_V3 || NFS_V3
334 depends on FILE_LOCKING
337 config NFS_ACL_SUPPORT
343 depends on NFSD || NFS_FS || LOCKD
346 config NFS_V4_2_SSC_HELPER
348 default y if NFS_V4_2
350 source "net/sunrpc/Kconfig"
351 source "fs/ceph/Kconfig"
353 source "fs/cifs/Kconfig"
354 source "fs/ksmbd/Kconfig"
361 source "fs/coda/Kconfig"
362 source "fs/afs/Kconfig"
363 source "fs/9p/Kconfig"
365 endif # NETWORK_FILESYSTEMS
367 source "fs/nls/Kconfig"
368 source "fs/dlm/Kconfig"
369 source "fs/unicode/Kconfig"