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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
21if BLOCK
22
23source "fs/ext2/Kconfig"
24source "fs/ext4/Kconfig"
25source "fs/jbd2/Kconfig"
26
27config FS_MBCACHE
28# Meta block cache for Extended Attributes (ext2/ext3/ext4)
29 tristate
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
33
34source "fs/reiserfs/Kconfig"
35source "fs/jfs/Kconfig"
36
37source "fs/xfs/Kconfig"
38source "fs/gfs2/Kconfig"
39source "fs/ocfs2/Kconfig"
40source "fs/btrfs/Kconfig"
41source "fs/nilfs2/Kconfig"
42source "fs/f2fs/Kconfig"
43source "fs/zonefs/Kconfig"
44
45endif # BLOCK
46
47config FS_DAX
48 bool "File system based Direct Access (DAX) support"
49 depends on MMU
50 depends on !(ARM || MIPS || SPARC)
51 depends on ZONE_DEVICE || FS_DAX_LIMITED
52 select FS_IOMAP
53 select DAX
54 help
55 Direct Access (DAX) can be used on memory-backed block devices.
56 If the block device supports DAX and the filesystem supports DAX,
57 then you can avoid using the pagecache to buffer I/Os. Turning
58 on this option will compile in support for DAX.
59
60 For a DAX device to support file system access it needs to have
61 struct pages. For the nfit based NVDIMMs this can be enabled
62 using the ndctl utility:
63
64 # ndctl create-namespace --force --reconfig=namespace0.0 \
65 --mode=fsdax --map=mem
66
67 See the 'create-namespace' man page for details on the overhead of
68 --map=mem:
69 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
70
71 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
72 file systems DAX support needs to be manually enabled globally or
73 per-inode using a mount option as well. See the file documentation in
74 Documentation/filesystems/dax.rst for details.
75
76 If you do not have a block device that is capable of using this,
77 or if unsure, say N. Saying Y will increase the size of the kernel
78 by about 5kB.
79
80config FS_DAX_PMD
81 bool
82 default FS_DAX
83 depends on FS_DAX
84 depends on ZONE_DEVICE
85 depends on TRANSPARENT_HUGEPAGE
86
87# Selected by DAX drivers that do not expect filesystem DAX to support
88# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
89# for fork() of processes with MAP_SHARED mappings or support for
90# direct-I/O to a DAX mapping.
91config FS_DAX_LIMITED
92 bool
93
94# Posix ACL utility routines
95#
96# Note: Posix ACLs can be implemented without these helpers. Never use
97# this symbol for ifdefs in core code.
98#
99config FS_POSIX_ACL
100 def_bool n
101
102config EXPORTFS
103 tristate
104
105config EXPORTFS_BLOCK_OPS
106 bool "Enable filesystem export operations for block IO"
107 help
108 This option enables the export operations for a filesystem to support
109 external block IO.
110
111config FILE_LOCKING
112 bool "Enable POSIX file locking API" if EXPERT
113 default y
114 help
115 This option enables standard file locking support, required
116 for filesystems like NFS and for the flock() system
117 call. Disabling this option saves about 11k.
118
119source "fs/crypto/Kconfig"
120
121source "fs/verity/Kconfig"
122
123source "fs/notify/Kconfig"
124
125source "fs/quota/Kconfig"
126
127source "fs/autofs/Kconfig"
128source "fs/fuse/Kconfig"
129source "fs/overlayfs/Kconfig"
130
131menu "Caches"
132
133source "fs/netfs/Kconfig"
134source "fs/fscache/Kconfig"
135source "fs/cachefiles/Kconfig"
136
137endmenu
138
139if BLOCK
140menu "CD-ROM/DVD Filesystems"
141
142source "fs/isofs/Kconfig"
143source "fs/udf/Kconfig"
144
145endmenu
146endif # BLOCK
147
148if BLOCK
149menu "DOS/FAT/EXFAT/NT Filesystems"
150
151source "fs/fat/Kconfig"
152source "fs/exfat/Kconfig"
153source "fs/ntfs/Kconfig"
154source "fs/ntfs3/Kconfig"
155
156endmenu
157endif # BLOCK
158
159menu "Pseudo filesystems"
160
161source "fs/proc/Kconfig"
162source "fs/kernfs/Kconfig"
163source "fs/sysfs/Kconfig"
164
165config TMPFS
166 bool "Tmpfs virtual memory file system support (former shm fs)"
167 depends on SHMEM
168 help
169 Tmpfs is a file system which keeps all files in virtual memory.
170
171 Everything in tmpfs is temporary in the sense that no files will be
172 created on your hard drive. The files live in memory and swap
173 space. If you unmount a tmpfs instance, everything stored therein is
174 lost.
175
176 See <file:Documentation/filesystems/tmpfs.rst> for details.
177
178config TMPFS_POSIX_ACL
179 bool "Tmpfs POSIX Access Control Lists"
180 depends on TMPFS
181 select TMPFS_XATTR
182 select FS_POSIX_ACL
183 help
184 POSIX Access Control Lists (ACLs) support additional access rights
185 for users and groups beyond the standard owner/group/world scheme,
186 and this option selects support for ACLs specifically for tmpfs
187 filesystems.
188
189 If you've selected TMPFS, it's possible that you'll also need
190 this option as there are a number of Linux distros that require
191 POSIX ACL support under /dev for certain features to work properly.
192 For example, some distros need this feature for ALSA-related /dev
193 files for sound to work properly. In short, if you're not sure,
194 say Y.
195
196config TMPFS_XATTR
197 bool "Tmpfs extended attributes"
198 depends on TMPFS
199 default n
200 help
201 Extended attributes are name:value pairs associated with inodes by
202 the kernel or by users (see the attr(5) manual page for details).
203
204 Currently this enables support for the trusted.* and
205 security.* namespaces.
206
207 You need this for POSIX ACL support on tmpfs.
208
209 If unsure, say N.
210
211config TMPFS_INODE64
212 bool "Use 64-bit ino_t by default in tmpfs"
213 depends on TMPFS && 64BIT
214 default n
215 help
216 tmpfs has historically used only inode numbers as wide as an unsigned
217 int. In some cases this can cause wraparound, potentially resulting
218 in multiple files with the same inode number on a single device. This
219 option makes tmpfs use the full width of ino_t by default, without
220 needing to specify the inode64 option when mounting.
221
222 But if a long-lived tmpfs is to be accessed by 32-bit applications so
223 ancient that opening a file larger than 2GiB fails with EINVAL, then
224 the INODE64 config option and inode64 mount option risk operations
225 failing with EOVERFLOW once 33-bit inode numbers are reached.
226
227 To override this configured default, use the inode32 or inode64
228 option when mounting.
229
230 If unsure, say N.
231
232config ARCH_SUPPORTS_HUGETLBFS
233 def_bool n
234
235config HUGETLBFS
236 bool "HugeTLB file system support"
237 depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
238 depends on (SYSFS || SYSCTL)
239 help
240 hugetlbfs is a filesystem backing for HugeTLB pages, based on
241 ramfs. For architectures that support it, say Y here and read
242 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
243
244 If unsure, say N.
245
246config HUGETLB_PAGE
247 def_bool HUGETLBFS
248
249#
250# Select this config option from the architecture Kconfig, if it is preferred
251# to enable the feature of HugeTLB Vmemmap Optimization (HVO).
252#
253config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
254 bool
255
256config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
257 def_bool HUGETLB_PAGE
258 depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
259 depends on SPARSEMEM_VMEMMAP
260
261config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
262 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
263 default n
264 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
265 help
266 The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
267 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
268 (boot command line) or hugetlb_optimize_vmemmap (sysctl).
269
270config MEMFD_CREATE
271 def_bool TMPFS || HUGETLBFS
272
273config ARCH_HAS_GIGANTIC_PAGE
274 bool
275
276source "fs/configfs/Kconfig"
277source "fs/efivarfs/Kconfig"
278
279endmenu
280
281menuconfig MISC_FILESYSTEMS
282 bool "Miscellaneous filesystems"
283 default y
284 help
285 Say Y here to get to see options for various miscellaneous
286 filesystems, such as filesystems that came from other
287 operating systems.
288
289 This option alone does not add any kernel code.
290
291 If you say N, all options in this submenu will be skipped and
292 disabled; if unsure, say Y here.
293
294if MISC_FILESYSTEMS
295
296source "fs/orangefs/Kconfig"
297source "fs/adfs/Kconfig"
298source "fs/affs/Kconfig"
299source "fs/ecryptfs/Kconfig"
300source "fs/hfs/Kconfig"
301source "fs/hfsplus/Kconfig"
302source "fs/befs/Kconfig"
303source "fs/bfs/Kconfig"
304source "fs/efs/Kconfig"
305source "fs/jffs2/Kconfig"
306# UBIFS File system configuration
307source "fs/ubifs/Kconfig"
308source "fs/cramfs/Kconfig"
309source "fs/squashfs/Kconfig"
310source "fs/freevxfs/Kconfig"
311source "fs/minix/Kconfig"
312source "fs/omfs/Kconfig"
313source "fs/hpfs/Kconfig"
314source "fs/qnx4/Kconfig"
315source "fs/qnx6/Kconfig"
316source "fs/romfs/Kconfig"
317source "fs/pstore/Kconfig"
318source "fs/sysv/Kconfig"
319source "fs/ufs/Kconfig"
320source "fs/erofs/Kconfig"
321source "fs/vboxsf/Kconfig"
322
323endif # MISC_FILESYSTEMS
324
325menuconfig NETWORK_FILESYSTEMS
326 bool "Network File Systems"
327 default y
328 depends on NET
329 help
330 Say Y here to get to see options for network filesystems and
331 filesystem-related networking code, such as NFS daemon and
332 RPCSEC security modules.
333
334 This option alone does not add any kernel code.
335
336 If you say N, all options in this submenu will be skipped and
337 disabled; if unsure, say Y here.
338
339if NETWORK_FILESYSTEMS
340
341source "fs/nfs/Kconfig"
342source "fs/nfsd/Kconfig"
343
344config GRACE_PERIOD
345 tristate
346
347config LOCKD
348 tristate
349 depends on FILE_LOCKING
350 select GRACE_PERIOD
351
352config LOCKD_V4
353 bool
354 depends on NFSD || NFS_V3
355 depends on FILE_LOCKING
356 default y
357
358config NFS_ACL_SUPPORT
359 tristate
360 select FS_POSIX_ACL
361
362config NFS_COMMON
363 bool
364 depends on NFSD || NFS_FS || LOCKD
365 default y
366
367config NFS_V4_2_SSC_HELPER
368 bool
369 default y if NFS_V4_2
370
371source "net/sunrpc/Kconfig"
372source "fs/ceph/Kconfig"
373
374source "fs/cifs/Kconfig"
375source "fs/ksmbd/Kconfig"
376
377config SMBFS_COMMON
378 tristate
379 default y if CIFS=y || SMB_SERVER=y
380 default m if CIFS=m || SMB_SERVER=m
381
382source "fs/coda/Kconfig"
383source "fs/afs/Kconfig"
384source "fs/9p/Kconfig"
385
386endif # NETWORK_FILESYSTEMS
387
388source "fs/nls/Kconfig"
389source "fs/dlm/Kconfig"
390source "fs/unicode/Kconfig"
391
392config IO_WQ
393 bool
394
395endmenu
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
18if BLOCK
19
20config FS_IOMAP
21 bool
22
23source "fs/ext2/Kconfig"
24source "fs/ext4/Kconfig"
25source "fs/jbd2/Kconfig"
26
27config FS_MBCACHE
28# Meta block cache for Extended Attributes (ext2/ext3/ext4)
29 tristate
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
33
34source "fs/reiserfs/Kconfig"
35source "fs/jfs/Kconfig"
36
37source "fs/xfs/Kconfig"
38source "fs/gfs2/Kconfig"
39source "fs/ocfs2/Kconfig"
40source "fs/btrfs/Kconfig"
41source "fs/nilfs2/Kconfig"
42source "fs/f2fs/Kconfig"
43
44config FS_DAX
45 bool "Direct Access (DAX) support"
46 depends on MMU
47 depends on !(ARM || MIPS || SPARC)
48 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
49 select FS_IOMAP
50 select DAX
51 help
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.
57
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
60 by about 5kB.
61
62config FS_DAX_PMD
63 bool
64 default FS_DAX
65 depends on FS_DAX
66 depends on ZONE_DEVICE
67 depends on TRANSPARENT_HUGEPAGE
68
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.
73config FS_DAX_LIMITED
74 bool
75
76endif # BLOCK
77
78# Posix ACL utility routines
79#
80# Note: Posix ACLs can be implemented without these helpers. Never use
81# this symbol for ifdefs in core code.
82#
83config FS_POSIX_ACL
84 def_bool n
85
86config EXPORTFS
87 tristate
88
89config EXPORTFS_BLOCK_OPS
90 bool "Enable filesystem export operations for block IO"
91 help
92 This option enables the export operations for a filesystem to support
93 external block IO.
94
95config FILE_LOCKING
96 bool "Enable POSIX file locking API" if EXPERT
97 default y
98 help
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.
102
103config MANDATORY_FILE_LOCKING
104 bool "Enable Mandatory file locking"
105 depends on FILE_LOCKING
106 default y
107 help
108 This option enables files appropriately marked files on appropriely
109 mounted filesystems to support mandatory locking.
110
111 To the best of my knowledge this is dead code that no one cares about.
112
113source "fs/crypto/Kconfig"
114
115source "fs/verity/Kconfig"
116
117source "fs/notify/Kconfig"
118
119source "fs/quota/Kconfig"
120
121source "fs/autofs/Kconfig"
122source "fs/fuse/Kconfig"
123source "fs/overlayfs/Kconfig"
124
125menu "Caches"
126
127source "fs/fscache/Kconfig"
128source "fs/cachefiles/Kconfig"
129
130endmenu
131
132if BLOCK
133menu "CD-ROM/DVD Filesystems"
134
135source "fs/isofs/Kconfig"
136source "fs/udf/Kconfig"
137
138endmenu
139endif # BLOCK
140
141if BLOCK
142menu "DOS/FAT/NT Filesystems"
143
144source "fs/fat/Kconfig"
145source "fs/ntfs/Kconfig"
146
147endmenu
148endif # BLOCK
149
150menu "Pseudo filesystems"
151
152source "fs/proc/Kconfig"
153source "fs/kernfs/Kconfig"
154source "fs/sysfs/Kconfig"
155
156config TMPFS
157 bool "Tmpfs virtual memory file system support (former shm fs)"
158 depends on SHMEM
159 help
160 Tmpfs is a file system which keeps all files in virtual memory.
161
162 Everything in tmpfs is temporary in the sense that no files will be
163 created on your hard drive. The files live in memory and swap
164 space. If you unmount a tmpfs instance, everything stored therein is
165 lost.
166
167 See <file:Documentation/filesystems/tmpfs.txt> for details.
168
169config TMPFS_POSIX_ACL
170 bool "Tmpfs POSIX Access Control Lists"
171 depends on TMPFS
172 select TMPFS_XATTR
173 select FS_POSIX_ACL
174 help
175 POSIX Access Control Lists (ACLs) support additional access rights
176 for users and groups beyond the standard owner/group/world scheme,
177 and this option selects support for ACLs specifically for tmpfs
178 filesystems.
179
180 If you've selected TMPFS, it's possible that you'll also need
181 this option as there are a number of Linux distros that require
182 POSIX ACL support under /dev for certain features to work properly.
183 For example, some distros need this feature for ALSA-related /dev
184 files for sound to work properly. In short, if you're not sure,
185 say Y.
186
187config TMPFS_XATTR
188 bool "Tmpfs extended attributes"
189 depends on TMPFS
190 default n
191 help
192 Extended attributes are name:value pairs associated with inodes by
193 the kernel or by users (see the attr(5) manual page for details).
194
195 Currently this enables support for the trusted.* and
196 security.* namespaces.
197
198 You need this for POSIX ACL support on tmpfs.
199
200 If unsure, say N.
201
202config HUGETLBFS
203 bool "HugeTLB file system support"
204 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
205 SYS_SUPPORTS_HUGETLBFS || BROKEN
206 help
207 hugetlbfs is a filesystem backing for HugeTLB pages, based on
208 ramfs. For architectures that support it, say Y here and read
209 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
210
211 If unsure, say N.
212
213config HUGETLB_PAGE
214 def_bool HUGETLBFS
215
216config MEMFD_CREATE
217 def_bool TMPFS || HUGETLBFS
218
219config ARCH_HAS_GIGANTIC_PAGE
220 bool
221
222source "fs/configfs/Kconfig"
223source "fs/efivarfs/Kconfig"
224
225endmenu
226
227menuconfig MISC_FILESYSTEMS
228 bool "Miscellaneous filesystems"
229 default y
230 ---help---
231 Say Y here to get to see options for various miscellaneous
232 filesystems, such as filesystems that came from other
233 operating systems.
234
235 This option alone does not add any kernel code.
236
237 If you say N, all options in this submenu will be skipped and
238 disabled; if unsure, say Y here.
239
240if MISC_FILESYSTEMS
241
242source "fs/orangefs/Kconfig"
243source "fs/adfs/Kconfig"
244source "fs/affs/Kconfig"
245source "fs/ecryptfs/Kconfig"
246source "fs/hfs/Kconfig"
247source "fs/hfsplus/Kconfig"
248source "fs/befs/Kconfig"
249source "fs/bfs/Kconfig"
250source "fs/efs/Kconfig"
251source "fs/jffs2/Kconfig"
252# UBIFS File system configuration
253source "fs/ubifs/Kconfig"
254source "fs/cramfs/Kconfig"
255source "fs/squashfs/Kconfig"
256source "fs/freevxfs/Kconfig"
257source "fs/minix/Kconfig"
258source "fs/omfs/Kconfig"
259source "fs/hpfs/Kconfig"
260source "fs/qnx4/Kconfig"
261source "fs/qnx6/Kconfig"
262source "fs/romfs/Kconfig"
263source "fs/pstore/Kconfig"
264source "fs/sysv/Kconfig"
265source "fs/ufs/Kconfig"
266source "fs/erofs/Kconfig"
267
268endif # MISC_FILESYSTEMS
269
270menuconfig NETWORK_FILESYSTEMS
271 bool "Network File Systems"
272 default y
273 depends on NET
274 ---help---
275 Say Y here to get to see options for network filesystems and
276 filesystem-related networking code, such as NFS daemon and
277 RPCSEC security modules.
278
279 This option alone does not add any kernel code.
280
281 If you say N, all options in this submenu will be skipped and
282 disabled; if unsure, say Y here.
283
284if NETWORK_FILESYSTEMS
285
286source "fs/nfs/Kconfig"
287source "fs/nfsd/Kconfig"
288
289config GRACE_PERIOD
290 tristate
291
292config LOCKD
293 tristate
294 depends on FILE_LOCKING
295 select GRACE_PERIOD
296
297config LOCKD_V4
298 bool
299 depends on NFSD_V3 || NFS_V3
300 depends on FILE_LOCKING
301 default y
302
303config NFS_ACL_SUPPORT
304 tristate
305 select FS_POSIX_ACL
306
307config NFS_COMMON
308 bool
309 depends on NFSD || NFS_FS || LOCKD
310 default y
311
312source "net/sunrpc/Kconfig"
313source "fs/ceph/Kconfig"
314source "fs/cifs/Kconfig"
315source "fs/coda/Kconfig"
316source "fs/afs/Kconfig"
317source "fs/9p/Kconfig"
318
319endif # NETWORK_FILESYSTEMS
320
321source "fs/nls/Kconfig"
322source "fs/dlm/Kconfig"
323source "fs/unicode/Kconfig"
324
325endmenu