Linux kernel mirror (for testing)
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linux
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# File system configuration
4#
5
6menu "File systems"
7
8# Use unaligned word dcache accesses
9config DCACHE_WORD_ACCESS
10 bool
11
12config VALIDATE_FS_PARSER
13 bool "Validate filesystem parameter description"
14 help
15 Enable this to perform validation of the parameter description for a
16 filesystem when it is registered.
17
18config FS_IOMAP
19 bool
20
21# Stackable filesystems
22config FS_STACK
23 bool
24
25config BUFFER_HEAD
26 bool
27
28# old blockdev_direct_IO implementation. Use iomap for new code instead
29config LEGACY_DIRECT_IO
30 depends on BUFFER_HEAD
31 bool
32
33if BLOCK
34
35source "fs/ext2/Kconfig"
36source "fs/ext4/Kconfig"
37source "fs/jbd2/Kconfig"
38
39config FS_MBCACHE
40# Meta block cache for Extended Attributes (ext2/ext3/ext4)
41 tristate
42 default y if EXT2_FS=y && EXT2_FS_XATTR
43 default y if EXT4_FS=y
44 default m if EXT2_FS_XATTR || EXT4_FS
45
46source "fs/jfs/Kconfig"
47
48source "fs/xfs/Kconfig"
49source "fs/gfs2/Kconfig"
50source "fs/ocfs2/Kconfig"
51source "fs/btrfs/Kconfig"
52source "fs/nilfs2/Kconfig"
53source "fs/f2fs/Kconfig"
54source "fs/zonefs/Kconfig"
55
56endif # BLOCK
57
58config FS_DAX
59 bool "File system based Direct Access (DAX) support"
60 depends on MMU
61 depends on ZONE_DEVICE
62 select FS_IOMAP
63 select DAX
64 help
65 Direct Access (DAX) can be used on memory-backed block devices.
66 If the block device supports DAX and the filesystem supports DAX,
67 then you can avoid using the pagecache to buffer I/Os. Turning
68 on this option will compile in support for DAX.
69
70 For a DAX device to support file system access it needs to have
71 struct pages. For the nfit based NVDIMMs this can be enabled
72 using the ndctl utility:
73
74 # ndctl create-namespace --force --reconfig=namespace0.0 \
75 --mode=fsdax --map=mem
76
77 See the 'create-namespace' man page for details on the overhead of
78 --map=mem:
79 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
80
81 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
82 file systems DAX support needs to be manually enabled globally or
83 per-inode using a mount option as well. See the file documentation in
84 Documentation/filesystems/dax.rst for details.
85
86 If you do not have a block device that is capable of using this,
87 or if unsure, say N. Saying Y will increase the size of the kernel
88 by about 5kB.
89
90config FS_DAX_PMD
91 bool
92 default FS_DAX
93 depends on FS_DAX
94 depends on ZONE_DEVICE
95 depends on TRANSPARENT_HUGEPAGE
96
97# Posix ACL utility routines
98#
99# Note: Posix ACLs can be implemented without these helpers. Never use
100# this symbol for ifdefs in core code.
101#
102config FS_POSIX_ACL
103 def_bool n
104
105config EXPORTFS
106 tristate
107
108config EXPORTFS_BLOCK_OPS
109 bool "Enable filesystem export operations for block IO"
110 help
111 This option enables the export operations for a filesystem to support
112 external block IO.
113
114config FILE_LOCKING
115 bool "Enable POSIX file locking API" if EXPERT
116 default y
117 help
118 This option enables standard file locking support, required
119 for filesystems like NFS and for the flock() system
120 call. Disabling this option saves about 11k.
121
122source "fs/crypto/Kconfig"
123
124source "fs/verity/Kconfig"
125
126source "fs/notify/Kconfig"
127
128source "fs/quota/Kconfig"
129
130source "fs/autofs/Kconfig"
131source "fs/fuse/Kconfig"
132source "fs/overlayfs/Kconfig"
133
134menu "Caches"
135
136source "fs/netfs/Kconfig"
137source "fs/cachefiles/Kconfig"
138
139endmenu
140
141if BLOCK
142menu "CD-ROM/DVD Filesystems"
143
144source "fs/isofs/Kconfig"
145source "fs/udf/Kconfig"
146
147endmenu
148endif # BLOCK
149
150if BLOCK
151menu "DOS/FAT/EXFAT/NT Filesystems"
152
153source "fs/fat/Kconfig"
154source "fs/exfat/Kconfig"
155source "fs/ntfs3/Kconfig"
156
157endmenu
158endif # BLOCK
159
160menu "Pseudo filesystems"
161
162source "fs/proc/Kconfig"
163source "fs/kernfs/Kconfig"
164source "fs/sysfs/Kconfig"
165
166config TMPFS
167 bool "Tmpfs virtual memory file system support (former shm fs)"
168 depends on SHMEM
169 select MEMFD_CREATE
170 help
171 Tmpfs is a file system which keeps all files in virtual memory.
172
173 Everything in tmpfs is temporary in the sense that no files will be
174 created on your hard drive. The files live in memory and swap
175 space. If you unmount a tmpfs instance, everything stored therein is
176 lost.
177
178 See <file:Documentation/filesystems/tmpfs.rst> for details.
179
180config TMPFS_POSIX_ACL
181 bool "Tmpfs POSIX Access Control Lists"
182 depends on TMPFS
183 select TMPFS_XATTR
184 select FS_POSIX_ACL
185 help
186 POSIX Access Control Lists (ACLs) support additional access rights
187 for users and groups beyond the standard owner/group/world scheme,
188 and this option selects support for ACLs specifically for tmpfs
189 filesystems.
190
191 If you've selected TMPFS, it's possible that you'll also need
192 this option as there are a number of Linux distros that require
193 POSIX ACL support under /dev for certain features to work properly.
194 For example, some distros need this feature for ALSA-related /dev
195 files for sound to work properly. In short, if you're not sure,
196 say Y.
197
198config TMPFS_XATTR
199 bool "Tmpfs extended attributes"
200 depends on TMPFS
201 default n
202 help
203 Extended attributes are name:value pairs associated with inodes by
204 the kernel or by users (see the attr(5) manual page for details).
205
206 This enables support for the trusted.*, security.* and user.*
207 namespaces.
208
209 You need this for POSIX ACL support on tmpfs.
210
211 If unsure, say N.
212
213config TMPFS_INODE64
214 bool "Use 64-bit ino_t by default in tmpfs"
215 depends on TMPFS && 64BIT
216 default n
217 help
218 tmpfs has historically used only inode numbers as wide as an unsigned
219 int. In some cases this can cause wraparound, potentially resulting
220 in multiple files with the same inode number on a single device. This
221 option makes tmpfs use the full width of ino_t by default, without
222 needing to specify the inode64 option when mounting.
223
224 But if a long-lived tmpfs is to be accessed by 32-bit applications so
225 ancient that opening a file larger than 2GiB fails with EINVAL, then
226 the INODE64 config option and inode64 mount option risk operations
227 failing with EOVERFLOW once 33-bit inode numbers are reached.
228
229 To override this configured default, use the inode32 or inode64
230 option when mounting.
231
232 If unsure, say N.
233
234config TMPFS_QUOTA
235 bool "Tmpfs quota support"
236 depends on TMPFS
237 select QUOTA
238 help
239 Quota support allows to set per user and group limits for tmpfs
240 usage. Say Y to enable quota support. Once enabled you can control
241 user and group quota enforcement with quota, usrquota and grpquota
242 mount options.
243
244 If unsure, say N.
245
246config ARCH_SUPPORTS_HUGETLBFS
247 def_bool n
248
249menuconfig HUGETLBFS
250 bool "HugeTLB file system support"
251 depends on ARCH_SUPPORTS_HUGETLBFS
252 select MEMFD_CREATE
253 select PADATA if SMP
254 help
255 hugetlbfs is a filesystem backing for HugeTLB pages, based on
256 ramfs. For architectures that support it, say Y here and read
257 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
258
259 If unsure, say N.
260
261if HUGETLBFS
262config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
263 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
264 default n
265 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
266 help
267 The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to
268 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
269 (boot command line) or hugetlb_optimize_vmemmap (sysctl).
270endif # HUGETLBFS
271
272config HUGETLB_PAGE
273 def_bool HUGETLBFS
274 select XARRAY_MULTI
275
276config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
277 def_bool HUGETLB_PAGE
278 depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
279 depends on SPARSEMEM_VMEMMAP
280 select SPARSEMEM_VMEMMAP_PREINIT if ARCH_WANT_HUGETLB_VMEMMAP_PREINIT
281
282config HUGETLB_PMD_PAGE_TABLE_SHARING
283 def_bool HUGETLB_PAGE
284 depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS
285
286config ARCH_HAS_GIGANTIC_PAGE
287 bool
288
289source "fs/configfs/Kconfig"
290source "fs/efivarfs/Kconfig"
291
292endmenu
293
294menuconfig MISC_FILESYSTEMS
295 bool "Miscellaneous filesystems"
296 default y
297 help
298 Say Y here to get to see options for various miscellaneous
299 filesystems, such as filesystems that came from other
300 operating systems.
301
302 This option alone does not add any kernel code.
303
304 If you say N, all options in this submenu will be skipped and
305 disabled; if unsure, say Y here.
306
307if MISC_FILESYSTEMS
308
309source "fs/orangefs/Kconfig"
310source "fs/adfs/Kconfig"
311source "fs/affs/Kconfig"
312source "fs/ecryptfs/Kconfig"
313source "fs/hfs/Kconfig"
314source "fs/hfsplus/Kconfig"
315source "fs/befs/Kconfig"
316source "fs/bfs/Kconfig"
317source "fs/efs/Kconfig"
318source "fs/jffs2/Kconfig"
319# UBIFS File system configuration
320source "fs/ubifs/Kconfig"
321source "fs/cramfs/Kconfig"
322source "fs/squashfs/Kconfig"
323source "fs/freevxfs/Kconfig"
324source "fs/minix/Kconfig"
325source "fs/omfs/Kconfig"
326source "fs/hpfs/Kconfig"
327source "fs/qnx4/Kconfig"
328source "fs/qnx6/Kconfig"
329source "fs/resctrl/Kconfig"
330source "fs/romfs/Kconfig"
331source "fs/pstore/Kconfig"
332source "fs/ufs/Kconfig"
333source "fs/erofs/Kconfig"
334source "fs/vboxsf/Kconfig"
335
336endif # MISC_FILESYSTEMS
337
338menuconfig NETWORK_FILESYSTEMS
339 bool "Network File Systems"
340 default y
341 depends on NET
342 help
343 Say Y here to get to see options for network filesystems and
344 filesystem-related networking code, such as NFS daemon and
345 RPCSEC security modules.
346
347 This option alone does not add any kernel code.
348
349 If you say N, all options in this submenu will be skipped and
350 disabled; if unsure, say Y here.
351
352if NETWORK_FILESYSTEMS
353
354source "fs/nfs/Kconfig"
355source "fs/nfsd/Kconfig"
356
357config GRACE_PERIOD
358 tristate
359
360config LOCKD
361 tristate
362 depends on FILE_LOCKING
363 select CRC32
364 select GRACE_PERIOD
365
366config LOCKD_V4
367 bool
368 depends on NFSD || NFS_V3
369 depends on FILE_LOCKING
370 default y
371
372config NFS_ACL_SUPPORT
373 tristate
374 select FS_POSIX_ACL
375
376config NFS_COMMON
377 bool
378 depends on NFSD || NFS_FS || LOCKD
379 default y
380
381config NFS_COMMON_LOCALIO_SUPPORT
382 tristate
383 depends on NFS_LOCALIO
384 default y if NFSD=y || NFS_FS=y
385 default m if NFSD=m && NFS_FS=m
386 select SUNRPC
387
388config NFS_LOCALIO
389 bool "NFS client and server support for LOCALIO auxiliary protocol"
390 depends on NFSD && NFS_FS
391 select NFS_COMMON_LOCALIO_SUPPORT
392 default n
393 help
394 Some NFS servers support an auxiliary NFS LOCALIO protocol
395 that is not an official part of the NFS protocol.
396
397 This option enables support for the LOCALIO protocol in the
398 kernel's NFS server and client. Enable this to permit local
399 NFS clients to bypass the network when issuing reads and
400 writes to the local NFS server.
401
402 If unsure, say N.
403
404config NFS_V4_2_SSC_HELPER
405 bool
406 default y if NFS_V4_2
407
408source "net/sunrpc/Kconfig"
409source "fs/ceph/Kconfig"
410
411source "fs/smb/Kconfig"
412source "fs/coda/Kconfig"
413source "fs/afs/Kconfig"
414source "fs/9p/Kconfig"
415
416endif # NETWORK_FILESYSTEMS
417
418source "fs/nls/Kconfig"
419source "fs/dlm/Kconfig"
420source "fs/unicode/Kconfig"
421
422config IO_WQ
423 bool
424
425endmenu