projects/linux·blob 2c455ddc · refs

431 lines · 10.6 KiB

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/ntfs/Kconfig"
156source "fs/ntfs3/Kconfig"
157
158endmenu
159endif # BLOCK
160
161menu "Pseudo filesystems"
162
163source "fs/proc/Kconfig"
164source "fs/kernfs/Kconfig"
165source "fs/sysfs/Kconfig"
166
167config TMPFS
168 bool "Tmpfs virtual memory file system support (former shm fs)"
169 depends on SHMEM
170 select MEMFD_CREATE
171 help
172 Tmpfs is a file system which keeps all files in virtual memory.
173
174 Everything in tmpfs is temporary in the sense that no files will be
175 created on your hard drive. The files live in memory and swap
176 space. If you unmount a tmpfs instance, everything stored therein is
177 lost.
178
179 See <file:Documentation/filesystems/tmpfs.rst> for details.
180
181config TMPFS_POSIX_ACL
182 bool "Tmpfs POSIX Access Control Lists"
183 depends on TMPFS
184 select TMPFS_XATTR
185 select FS_POSIX_ACL
186 help
187 POSIX Access Control Lists (ACLs) support additional access rights
188 for users and groups beyond the standard owner/group/world scheme,
189 and this option selects support for ACLs specifically for tmpfs
190 filesystems.
191
192 If you've selected TMPFS, it's possible that you'll also need
193 this option as there are a number of Linux distros that require
194 POSIX ACL support under /dev for certain features to work properly.
195 For example, some distros need this feature for ALSA-related /dev
196 files for sound to work properly. In short, if you're not sure,
197 say Y.
198
199config TMPFS_XATTR
200 bool "Tmpfs extended attributes"
201 depends on TMPFS
202 default n
203 help
204 Extended attributes are name:value pairs associated with inodes by
205 the kernel or by users (see the attr(5) manual page for details).
206
207 This enables support for the trusted.*, security.* and user.*
208 namespaces.
209
210 You need this for POSIX ACL support on tmpfs.
211
212 If unsure, say N.
213
214config TMPFS_INODE64
215 bool "Use 64-bit ino_t by default in tmpfs"
216 depends on TMPFS && 64BIT
217 default n
218 help
219 tmpfs has historically used only inode numbers as wide as an unsigned
220 int. In some cases this can cause wraparound, potentially resulting
221 in multiple files with the same inode number on a single device. This
222 option makes tmpfs use the full width of ino_t by default, without
223 needing to specify the inode64 option when mounting.
224
225 But if a long-lived tmpfs is to be accessed by 32-bit applications so
226 ancient that opening a file larger than 2GiB fails with EINVAL, then
227 the INODE64 config option and inode64 mount option risk operations
228 failing with EOVERFLOW once 33-bit inode numbers are reached.
229
230 To override this configured default, use the inode32 or inode64
231 option when mounting.
232
233 If unsure, say N.
234
235config TMPFS_QUOTA
236 bool "Tmpfs quota support"
237 depends on TMPFS
238 select QUOTA
239 help
240 Quota support allows to set per user and group limits for tmpfs
241 usage. Say Y to enable quota support. Once enabled you can control
242 user and group quota enforcement with quota, usrquota and grpquota
243 mount options.
244
245 If unsure, say N.
246
247config ARCH_SUPPORTS_HUGETLBFS
248 def_bool n
249
250menuconfig HUGETLBFS
251 bool "HugeTLB file system support"
252 depends on ARCH_SUPPORTS_HUGETLBFS
253 select MEMFD_CREATE
254 select PADATA if SMP
255 help
256 hugetlbfs is a filesystem backing for HugeTLB pages, based on
257 ramfs. For architectures that support it, say Y here and read
258 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
259
260 If unsure, say N.
261
262if HUGETLBFS
263config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
264 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
265 default n
266 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
267 help
268 The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to
269 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
270 (boot command line) or hugetlb_optimize_vmemmap (sysctl).
271endif # HUGETLBFS
272
273config HUGETLB_PAGE
274 def_bool HUGETLBFS
275 select XARRAY_MULTI
276
277config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
278 def_bool HUGETLB_PAGE
279 depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
280 depends on SPARSEMEM_VMEMMAP
281 select SPARSEMEM_VMEMMAP_PREINIT if ARCH_WANT_HUGETLB_VMEMMAP_PREINIT
282
283config HUGETLB_PMD_PAGE_TABLE_SHARING
284 def_bool HUGETLB_PAGE
285 depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS
286
287config ARCH_HAS_GIGANTIC_PAGE
288 bool
289
290source "fs/configfs/Kconfig"
291source "fs/efivarfs/Kconfig"
292
293endmenu
294
295menuconfig MISC_FILESYSTEMS
296 bool "Miscellaneous filesystems"
297 default y
298 help
299 Say Y here to get to see options for various miscellaneous
300 filesystems, such as filesystems that came from other
301 operating systems.
302
303 This option alone does not add any kernel code.
304
305 If you say N, all options in this submenu will be skipped and
306 disabled; if unsure, say Y here.
307
308if MISC_FILESYSTEMS
309
310source "fs/orangefs/Kconfig"
311source "fs/adfs/Kconfig"
312source "fs/affs/Kconfig"
313source "fs/ecryptfs/Kconfig"
314source "fs/hfs/Kconfig"
315source "fs/hfsplus/Kconfig"
316source "fs/befs/Kconfig"
317source "fs/jffs2/Kconfig"
318# UBIFS File system configuration
319source "fs/ubifs/Kconfig"
320source "fs/cramfs/Kconfig"
321source "fs/squashfs/Kconfig"
322source "fs/minix/Kconfig"
323source "fs/omfs/Kconfig"
324source "fs/hpfs/Kconfig"
325source "fs/qnx4/Kconfig"
326source "fs/qnx6/Kconfig"
327source "fs/resctrl/Kconfig"
328source "fs/romfs/Kconfig"
329source "fs/pstore/Kconfig"
330source "fs/ufs/Kconfig"
331source "fs/erofs/Kconfig"
332source "fs/vboxsf/Kconfig"
333
334endif # MISC_FILESYSTEMS
335
336menuconfig NETWORK_FILESYSTEMS
337 bool "Network File Systems"
338 default y
339 depends on NET
340 help
341 Say Y here to get to see options for network filesystems and
342 filesystem-related networking code, such as NFS daemon and
343 RPCSEC security modules.
344
345 This option alone does not add any kernel code.
346
347 If you say N, all options in this submenu will be skipped and
348 disabled; if unsure, say Y here.
349
350if NETWORK_FILESYSTEMS
351
352source "fs/nfs/Kconfig"
353source "fs/nfsd/Kconfig"
354
355config GRACE_PERIOD
356 tristate
357
358config LOCKD
359 tristate
360 depends on FILE_LOCKING
361 select CRC32
362 select GRACE_PERIOD
363
364config LOCKD_V4
365 bool
366 depends on NFSD || NFS_V3
367 depends on FILE_LOCKING
368 default y
369
370config NFS_ACL_SUPPORT
371 tristate
372 select FS_POSIX_ACL
373
374config NFS_COMMON
375 bool
376 depends on NFSD || NFS_FS || LOCKD
377 default y
378
379config NFS_COMMON_LOCALIO_SUPPORT
380 tristate
381 depends on NFS_LOCALIO
382 default y if NFSD=y || NFS_FS=y
383 default m if NFSD=m && NFS_FS=m
384 select SUNRPC
385
386config NFS_LOCALIO
387 bool "NFS client and server support for LOCALIO auxiliary protocol"
388 depends on NFSD && NFS_FS
389 select NFS_COMMON_LOCALIO_SUPPORT
390 default n
391 help
392 Some NFS servers support an auxiliary NFS LOCALIO protocol
393 that is not an official part of the NFS protocol.
394
395 This option enables support for the LOCALIO protocol in the
396 kernel's NFS server and client. Enable this to permit local
397 NFS clients to bypass the network when issuing reads and
398 writes to the local NFS server.
399
400 If unsure, say N.
401
402config NFS_V4_2_SSC_HELPER
403 bool
404 default y if NFS_V4_2
405
406source "net/sunrpc/Kconfig"
407source "fs/ceph/Kconfig"
408
409source "fs/smb/Kconfig"
410source "fs/coda/Kconfig"
411source "fs/afs/Kconfig"
412source "fs/9p/Kconfig"
413
414endif # NETWORK_FILESYSTEMS
415
416source "fs/nls/Kconfig"
417source "fs/dlm/Kconfig"
418source "fs/unicode/Kconfig"
419
420config IO_WQ
421 bool
422
423config FDTABLE_KUNIT_TEST
424 bool "KUnit test for fdtable" if !KUNIT_ALL_TESTS
425 depends on KUNIT=y
426 default KUNIT_ALL_TESTS
427 help
428 This builds the fdtable KUnit tests, which tests various aspects
429 of the fdtable structure and allocation.
430
431endmenu