1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 # 2 #
3 # File system configuration 3 # File system configuration
4 # 4 #
5 5
6 menu "File systems" 6 menu "File systems"
7 7
8 # Use unaligned word dcache accesses 8 # Use unaligned word dcache accesses
9 config DCACHE_WORD_ACCESS 9 config DCACHE_WORD_ACCESS
10 bool 10 bool
11 11
12 config VALIDATE_FS_PARSER 12 config VALIDATE_FS_PARSER
13 bool "Validate filesystem parameter de 13 bool "Validate filesystem parameter description"
14 help 14 help
15 Enable this to perform validation of 15 Enable this to perform validation of the parameter description for a
16 filesystem when it is registered. 16 filesystem when it is registered.
17 17
18 config FS_IOMAP !! 18 if BLOCK
19 bool <<
20 <<
21 # Stackable filesystems <<
22 config FS_STACK <<
23 bool <<
24 <<
25 config BUFFER_HEAD <<
26 bool <<
27 19
28 # old blockdev_direct_IO implementation. Use !! 20 config FS_IOMAP
29 config LEGACY_DIRECT_IO <<
30 depends on BUFFER_HEAD <<
31 bool 21 bool
32 22
33 if BLOCK <<
34 <<
35 source "fs/ext2/Kconfig" 23 source "fs/ext2/Kconfig"
36 source "fs/ext4/Kconfig" 24 source "fs/ext4/Kconfig"
37 source "fs/jbd2/Kconfig" 25 source "fs/jbd2/Kconfig"
38 26
39 config FS_MBCACHE 27 config FS_MBCACHE
40 # Meta block cache for Extended Attributes (ex 28 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
41 tristate 29 tristate
42 default y if EXT2_FS=y && EXT2_FS_XATT 30 default y if EXT2_FS=y && EXT2_FS_XATTR
43 default y if EXT4_FS=y 31 default y if EXT4_FS=y
44 default m if EXT2_FS_XATTR || EXT4_FS 32 default m if EXT2_FS_XATTR || EXT4_FS
45 33
46 source "fs/reiserfs/Kconfig" 34 source "fs/reiserfs/Kconfig"
47 source "fs/jfs/Kconfig" 35 source "fs/jfs/Kconfig"
48 36
49 source "fs/xfs/Kconfig" 37 source "fs/xfs/Kconfig"
50 source "fs/gfs2/Kconfig" 38 source "fs/gfs2/Kconfig"
51 source "fs/ocfs2/Kconfig" 39 source "fs/ocfs2/Kconfig"
52 source "fs/btrfs/Kconfig" 40 source "fs/btrfs/Kconfig"
53 source "fs/nilfs2/Kconfig" 41 source "fs/nilfs2/Kconfig"
54 source "fs/f2fs/Kconfig" 42 source "fs/f2fs/Kconfig"
55 source "fs/bcachefs/Kconfig" <<
56 source "fs/zonefs/Kconfig" 43 source "fs/zonefs/Kconfig"
57 44
58 endif # BLOCK <<
59 <<
60 config FS_DAX 45 config FS_DAX
61 bool "File system based Direct Access !! 46 bool "Direct Access (DAX) support"
62 depends on MMU 47 depends on MMU
63 depends on ZONE_DEVICE || FS_DAX_LIMIT !! 48 depends on !(ARM || MIPS || SPARC)
>> 49 select DEV_PAGEMAP_OPS if (ZONE_DEVICE && !FS_DAX_LIMITED)
64 select FS_IOMAP 50 select FS_IOMAP
65 select DAX 51 select DAX
66 help 52 help
67 Direct Access (DAX) can be used on m 53 Direct Access (DAX) can be used on memory-backed block devices.
68 If the block device supports DAX and 54 If the block device supports DAX and the filesystem supports DAX,
69 then you can avoid using the pagecac 55 then you can avoid using the pagecache to buffer I/Os. Turning
70 on this option will compile in suppo !! 56 on this option will compile in support for DAX; you will need to
71 !! 57 mount the filesystem using the -o dax option.
72 For a DAX device to support file sys <<
73 struct pages. For the nfit based NV <<
74 using the ndctl utility: <<
75 <<
76 # ndctl create-namespace --for <<
77 --mode=fsdax --map=mem <<
78 <<
79 See the 'create-namespace' man page <<
80 --map=mem: <<
81 https://docs.pmem.io/ndctl-user-guid <<
82 <<
83 For ndctl to work CONFIG_DEV_DAX nee <<
84 file systems DAX support needs to be <<
85 per-inode using a mount option as we <<
86 Documentation/filesystems/dax.rst fo <<
87 58
88 If you do not have a block device th 59 If you do not have a block device that is capable of using this,
89 or if unsure, say N. Saying Y will 60 or if unsure, say N. Saying Y will increase the size of the kernel
90 by about 5kB. 61 by about 5kB.
91 62
92 config FS_DAX_PMD 63 config FS_DAX_PMD
93 bool 64 bool
94 default FS_DAX 65 default FS_DAX
95 depends on FS_DAX 66 depends on FS_DAX
96 depends on ZONE_DEVICE 67 depends on ZONE_DEVICE
97 depends on TRANSPARENT_HUGEPAGE 68 depends on TRANSPARENT_HUGEPAGE
98 69
99 # Selected by DAX drivers that do not expect f 70 # Selected by DAX drivers that do not expect filesystem DAX to support
100 # get_user_pages() of DAX mappings. I.e. "limi 71 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
101 # for fork() of processes with MAP_SHARED mapp 72 # for fork() of processes with MAP_SHARED mappings or support for
102 # direct-I/O to a DAX mapping. 73 # direct-I/O to a DAX mapping.
103 config FS_DAX_LIMITED 74 config FS_DAX_LIMITED
104 bool 75 bool
105 76
>> 77 endif # BLOCK
>> 78
106 # Posix ACL utility routines 79 # Posix ACL utility routines
107 # 80 #
108 # Note: Posix ACLs can be implemented without 81 # Note: Posix ACLs can be implemented without these helpers. Never use
109 # this symbol for ifdefs in core code. 82 # this symbol for ifdefs in core code.
110 # 83 #
111 config FS_POSIX_ACL 84 config FS_POSIX_ACL
112 def_bool n 85 def_bool n
113 86
114 config EXPORTFS 87 config EXPORTFS
115 tristate 88 tristate
116 89
117 config EXPORTFS_BLOCK_OPS 90 config EXPORTFS_BLOCK_OPS
118 bool "Enable filesystem export operati 91 bool "Enable filesystem export operations for block IO"
119 help 92 help
120 This option enables the export opera 93 This option enables the export operations for a filesystem to support
121 external block IO. 94 external block IO.
122 95
123 config FILE_LOCKING 96 config FILE_LOCKING
124 bool "Enable POSIX file locking API" i 97 bool "Enable POSIX file locking API" if EXPERT
125 default y 98 default y
126 help 99 help
127 This option enables standard file lo 100 This option enables standard file locking support, required
128 for filesystems like NFS and for the 101 for filesystems like NFS and for the flock() system
129 call. Disabling this option saves ab 102 call. Disabling this option saves about 11k.
130 103
>> 104 config MANDATORY_FILE_LOCKING
>> 105 bool "Enable Mandatory file locking"
>> 106 depends on FILE_LOCKING
>> 107 default y
>> 108 help
>> 109 This option enables files appropriately marked files on appropriely
>> 110 mounted filesystems to support mandatory locking.
>> 111
>> 112 To the best of my knowledge this is dead code that no one cares about.
>> 113
131 source "fs/crypto/Kconfig" 114 source "fs/crypto/Kconfig"
132 115
133 source "fs/verity/Kconfig" 116 source "fs/verity/Kconfig"
134 117
135 source "fs/notify/Kconfig" 118 source "fs/notify/Kconfig"
136 119
137 source "fs/quota/Kconfig" 120 source "fs/quota/Kconfig"
138 121
139 source "fs/autofs/Kconfig" 122 source "fs/autofs/Kconfig"
140 source "fs/fuse/Kconfig" 123 source "fs/fuse/Kconfig"
141 source "fs/overlayfs/Kconfig" 124 source "fs/overlayfs/Kconfig"
142 125
143 menu "Caches" 126 menu "Caches"
144 127
145 source "fs/netfs/Kconfig" !! 128 source "fs/fscache/Kconfig"
146 source "fs/cachefiles/Kconfig" 129 source "fs/cachefiles/Kconfig"
147 130
148 endmenu 131 endmenu
149 132
150 if BLOCK 133 if BLOCK
151 menu "CD-ROM/DVD Filesystems" 134 menu "CD-ROM/DVD Filesystems"
152 135
153 source "fs/isofs/Kconfig" 136 source "fs/isofs/Kconfig"
154 source "fs/udf/Kconfig" 137 source "fs/udf/Kconfig"
155 138
156 endmenu 139 endmenu
157 endif # BLOCK 140 endif # BLOCK
158 141
159 if BLOCK 142 if BLOCK
160 menu "DOS/FAT/EXFAT/NT Filesystems" 143 menu "DOS/FAT/EXFAT/NT Filesystems"
161 144
162 source "fs/fat/Kconfig" 145 source "fs/fat/Kconfig"
163 source "fs/exfat/Kconfig" 146 source "fs/exfat/Kconfig"
164 source "fs/ntfs3/Kconfig" !! 147 source "fs/ntfs/Kconfig"
165 148
166 endmenu 149 endmenu
167 endif # BLOCK 150 endif # BLOCK
168 151
169 menu "Pseudo filesystems" 152 menu "Pseudo filesystems"
170 153
171 source "fs/proc/Kconfig" 154 source "fs/proc/Kconfig"
172 source "fs/kernfs/Kconfig" 155 source "fs/kernfs/Kconfig"
173 source "fs/sysfs/Kconfig" 156 source "fs/sysfs/Kconfig"
174 157
175 config TMPFS 158 config TMPFS
176 bool "Tmpfs virtual memory file system 159 bool "Tmpfs virtual memory file system support (former shm fs)"
177 depends on SHMEM 160 depends on SHMEM
178 select MEMFD_CREATE <<
179 help 161 help
180 Tmpfs is a file system which keeps a 162 Tmpfs is a file system which keeps all files in virtual memory.
181 163
182 Everything in tmpfs is temporary in 164 Everything in tmpfs is temporary in the sense that no files will be
183 created on your hard drive. The file 165 created on your hard drive. The files live in memory and swap
184 space. If you unmount a tmpfs instan 166 space. If you unmount a tmpfs instance, everything stored therein is
185 lost. 167 lost.
186 168
187 See <file:Documentation/filesystems/ 169 See <file:Documentation/filesystems/tmpfs.rst> for details.
188 170
189 config TMPFS_POSIX_ACL 171 config TMPFS_POSIX_ACL
190 bool "Tmpfs POSIX Access Control Lists 172 bool "Tmpfs POSIX Access Control Lists"
191 depends on TMPFS 173 depends on TMPFS
192 select TMPFS_XATTR 174 select TMPFS_XATTR
193 select FS_POSIX_ACL 175 select FS_POSIX_ACL
194 help 176 help
195 POSIX Access Control Lists (ACLs) su 177 POSIX Access Control Lists (ACLs) support additional access rights
196 for users and groups beyond the stan 178 for users and groups beyond the standard owner/group/world scheme,
197 and this option selects support for 179 and this option selects support for ACLs specifically for tmpfs
198 filesystems. 180 filesystems.
199 181
200 If you've selected TMPFS, it's possi 182 If you've selected TMPFS, it's possible that you'll also need
201 this option as there are a number of 183 this option as there are a number of Linux distros that require
202 POSIX ACL support under /dev for cer 184 POSIX ACL support under /dev for certain features to work properly.
203 For example, some distros need this 185 For example, some distros need this feature for ALSA-related /dev
204 files for sound to work properly. I 186 files for sound to work properly. In short, if you're not sure,
205 say Y. 187 say Y.
206 188
207 config TMPFS_XATTR 189 config TMPFS_XATTR
208 bool "Tmpfs extended attributes" 190 bool "Tmpfs extended attributes"
209 depends on TMPFS 191 depends on TMPFS
210 default n 192 default n
211 help 193 help
212 Extended attributes are name:value p 194 Extended attributes are name:value pairs associated with inodes by
213 the kernel or by users (see the attr 195 the kernel or by users (see the attr(5) manual page for details).
214 196
215 This enables support for the trusted !! 197 Currently this enables support for the trusted.* and
216 namespaces. !! 198 security.* namespaces.
217 199
218 You need this for POSIX ACL support 200 You need this for POSIX ACL support on tmpfs.
219 201
220 If unsure, say N. 202 If unsure, say N.
221 203
222 config TMPFS_INODE64 204 config TMPFS_INODE64
223 bool "Use 64-bit ino_t by default in t 205 bool "Use 64-bit ino_t by default in tmpfs"
224 depends on TMPFS && 64BIT 206 depends on TMPFS && 64BIT
225 default n 207 default n
226 help 208 help
227 tmpfs has historically used only ino 209 tmpfs has historically used only inode numbers as wide as an unsigned
228 int. In some cases this can cause wr 210 int. In some cases this can cause wraparound, potentially resulting
229 in multiple files with the same inod 211 in multiple files with the same inode number on a single device. This
230 option makes tmpfs use the full widt 212 option makes tmpfs use the full width of ino_t by default, without
231 needing to specify the inode64 optio 213 needing to specify the inode64 option when mounting.
232 214
233 But if a long-lived tmpfs is to be a 215 But if a long-lived tmpfs is to be accessed by 32-bit applications so
234 ancient that opening a file larger t 216 ancient that opening a file larger than 2GiB fails with EINVAL, then
235 the INODE64 config option and inode6 217 the INODE64 config option and inode64 mount option risk operations
236 failing with EOVERFLOW once 33-bit i 218 failing with EOVERFLOW once 33-bit inode numbers are reached.
237 219
238 To override this configured default, 220 To override this configured default, use the inode32 or inode64
239 option when mounting. 221 option when mounting.
240 222
241 If unsure, say N. 223 If unsure, say N.
242 224
243 config TMPFS_QUOTA !! 225 config HUGETLBFS
244 bool "Tmpfs quota support" <<
245 depends on TMPFS <<
246 select QUOTA <<
247 help <<
248 Quota support allows to set per user <<
249 usage. Say Y to enable quota suppor <<
250 user and group quota enforcement wit <<
251 mount options. <<
252 <<
253 If unsure, say N. <<
254 <<
255 config ARCH_SUPPORTS_HUGETLBFS <<
256 def_bool n <<
257 <<
258 menuconfig HUGETLBFS <<
259 bool "HugeTLB file system support" 226 bool "HugeTLB file system support"
260 depends on X86 || SPARC64 || ARCH_SUPP !! 227 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
261 depends on (SYSFS || SYSCTL) !! 228 SYS_SUPPORTS_HUGETLBFS || BROKEN
262 select MEMFD_CREATE <<
263 select PADATA if SMP <<
264 help 229 help
265 hugetlbfs is a filesystem backing fo 230 hugetlbfs is a filesystem backing for HugeTLB pages, based on
266 ramfs. For architectures that suppor 231 ramfs. For architectures that support it, say Y here and read
267 <file:Documentation/admin-guide/mm/h 232 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
268 233
269 If unsure, say N. 234 If unsure, say N.
270 235
271 if HUGETLBFS <<
272 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_O <<
273 bool "HugeTLB Vmemmap Optimization (HV <<
274 default n <<
275 depends on HUGETLB_PAGE_OPTIMIZE_VMEMM <<
276 help <<
277 The HugeTLB Vmemmap Optimization (HV <<
278 enable HVO by default. It can be dis <<
279 (boot command line) or hugetlb_optim <<
280 endif # HUGETLBFS <<
281 <<
282 config HUGETLB_PAGE 236 config HUGETLB_PAGE
283 def_bool HUGETLBFS 237 def_bool HUGETLBFS
284 select XARRAY_MULTI <<
285 238
286 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP !! 239 config MEMFD_CREATE
287 def_bool HUGETLB_PAGE !! 240 def_bool TMPFS || HUGETLBFS
288 depends on ARCH_WANT_OPTIMIZE_HUGETLB_ <<
289 depends on SPARSEMEM_VMEMMAP <<
290 <<
291 config HUGETLB_PMD_PAGE_TABLE_SHARING <<
292 def_bool HUGETLB_PAGE <<
293 depends on ARCH_WANT_HUGE_PMD_SHARE && <<
294 241
295 config ARCH_HAS_GIGANTIC_PAGE 242 config ARCH_HAS_GIGANTIC_PAGE
296 bool 243 bool
297 244
298 source "fs/configfs/Kconfig" 245 source "fs/configfs/Kconfig"
299 source "fs/efivarfs/Kconfig" 246 source "fs/efivarfs/Kconfig"
300 247
301 endmenu 248 endmenu
302 249
303 menuconfig MISC_FILESYSTEMS 250 menuconfig MISC_FILESYSTEMS
304 bool "Miscellaneous filesystems" 251 bool "Miscellaneous filesystems"
305 default y 252 default y
306 help 253 help
307 Say Y here to get to see options for 254 Say Y here to get to see options for various miscellaneous
308 filesystems, such as filesystems tha 255 filesystems, such as filesystems that came from other
309 operating systems. 256 operating systems.
310 257
311 This option alone does not add any k 258 This option alone does not add any kernel code.
312 259
313 If you say N, all options in this su 260 If you say N, all options in this submenu will be skipped and
314 disabled; if unsure, say Y here. 261 disabled; if unsure, say Y here.
315 262
316 if MISC_FILESYSTEMS 263 if MISC_FILESYSTEMS
317 264
318 source "fs/orangefs/Kconfig" 265 source "fs/orangefs/Kconfig"
319 source "fs/adfs/Kconfig" 266 source "fs/adfs/Kconfig"
320 source "fs/affs/Kconfig" 267 source "fs/affs/Kconfig"
321 source "fs/ecryptfs/Kconfig" 268 source "fs/ecryptfs/Kconfig"
322 source "fs/hfs/Kconfig" 269 source "fs/hfs/Kconfig"
323 source "fs/hfsplus/Kconfig" 270 source "fs/hfsplus/Kconfig"
324 source "fs/befs/Kconfig" 271 source "fs/befs/Kconfig"
325 source "fs/bfs/Kconfig" 272 source "fs/bfs/Kconfig"
326 source "fs/efs/Kconfig" 273 source "fs/efs/Kconfig"
327 source "fs/jffs2/Kconfig" 274 source "fs/jffs2/Kconfig"
328 # UBIFS File system configuration 275 # UBIFS File system configuration
329 source "fs/ubifs/Kconfig" 276 source "fs/ubifs/Kconfig"
330 source "fs/cramfs/Kconfig" 277 source "fs/cramfs/Kconfig"
331 source "fs/squashfs/Kconfig" 278 source "fs/squashfs/Kconfig"
332 source "fs/freevxfs/Kconfig" 279 source "fs/freevxfs/Kconfig"
333 source "fs/minix/Kconfig" 280 source "fs/minix/Kconfig"
334 source "fs/omfs/Kconfig" 281 source "fs/omfs/Kconfig"
335 source "fs/hpfs/Kconfig" 282 source "fs/hpfs/Kconfig"
336 source "fs/qnx4/Kconfig" 283 source "fs/qnx4/Kconfig"
337 source "fs/qnx6/Kconfig" 284 source "fs/qnx6/Kconfig"
338 source "fs/romfs/Kconfig" 285 source "fs/romfs/Kconfig"
339 source "fs/pstore/Kconfig" 286 source "fs/pstore/Kconfig"
340 source "fs/sysv/Kconfig" 287 source "fs/sysv/Kconfig"
341 source "fs/ufs/Kconfig" 288 source "fs/ufs/Kconfig"
342 source "fs/erofs/Kconfig" 289 source "fs/erofs/Kconfig"
343 source "fs/vboxsf/Kconfig" 290 source "fs/vboxsf/Kconfig"
344 291
345 endif # MISC_FILESYSTEMS 292 endif # MISC_FILESYSTEMS
346 293
347 menuconfig NETWORK_FILESYSTEMS 294 menuconfig NETWORK_FILESYSTEMS
348 bool "Network File Systems" 295 bool "Network File Systems"
349 default y 296 default y
350 depends on NET 297 depends on NET
351 help 298 help
352 Say Y here to get to see options for 299 Say Y here to get to see options for network filesystems and
353 filesystem-related networking code, 300 filesystem-related networking code, such as NFS daemon and
354 RPCSEC security modules. 301 RPCSEC security modules.
355 302
356 This option alone does not add any k 303 This option alone does not add any kernel code.
357 304
358 If you say N, all options in this su 305 If you say N, all options in this submenu will be skipped and
359 disabled; if unsure, say Y here. 306 disabled; if unsure, say Y here.
360 307
361 if NETWORK_FILESYSTEMS 308 if NETWORK_FILESYSTEMS
362 309
363 source "fs/nfs/Kconfig" 310 source "fs/nfs/Kconfig"
364 source "fs/nfsd/Kconfig" 311 source "fs/nfsd/Kconfig"
365 312
366 config GRACE_PERIOD 313 config GRACE_PERIOD
367 tristate 314 tristate
368 315
369 config LOCKD 316 config LOCKD
370 tristate 317 tristate
371 depends on FILE_LOCKING 318 depends on FILE_LOCKING
372 select GRACE_PERIOD 319 select GRACE_PERIOD
373 320
374 config LOCKD_V4 321 config LOCKD_V4
375 bool 322 bool
376 depends on NFSD || NFS_V3 !! 323 depends on NFSD_V3 || NFS_V3
377 depends on FILE_LOCKING 324 depends on FILE_LOCKING
378 default y 325 default y
379 326
380 config NFS_ACL_SUPPORT 327 config NFS_ACL_SUPPORT
381 tristate 328 tristate
382 select FS_POSIX_ACL 329 select FS_POSIX_ACL
383 330
384 config NFS_COMMON 331 config NFS_COMMON
385 bool 332 bool
386 depends on NFSD || NFS_FS || LOCKD 333 depends on NFSD || NFS_FS || LOCKD
387 default y 334 default y
388 335
389 config NFS_COMMON_LOCALIO_SUPPORT <<
390 tristate <<
391 depends on NFS_LOCALIO <<
392 default y if NFSD=y || NFS_FS=y <<
393 default m if NFSD=m && NFS_FS=m <<
394 select SUNRPC <<
395 <<
396 config NFS_LOCALIO <<
397 bool "NFS client and server support fo <<
398 depends on NFSD && NFS_FS <<
399 select NFS_COMMON_LOCALIO_SUPPORT <<
400 default n <<
401 help <<
402 Some NFS servers support an auxiliar <<
403 that is not an official part of the <<
404 <<
405 This option enables support for the <<
406 kernel's NFS server and client. Enab <<
407 NFS clients to bypass the network wh <<
408 writes to the local NFS server. <<
409 <<
410 If unsure, say N. <<
411 <<
412 config NFS_V4_2_SSC_HELPER <<
413 bool <<
414 default y if NFS_V4_2 <<
415 <<
416 source "net/sunrpc/Kconfig" 336 source "net/sunrpc/Kconfig"
417 source "fs/ceph/Kconfig" 337 source "fs/ceph/Kconfig"
418 !! 338 source "fs/cifs/Kconfig"
419 source "fs/smb/Kconfig" <<
420 source "fs/coda/Kconfig" 339 source "fs/coda/Kconfig"
421 source "fs/afs/Kconfig" 340 source "fs/afs/Kconfig"
422 source "fs/9p/Kconfig" 341 source "fs/9p/Kconfig"
423 342
424 endif # NETWORK_FILESYSTEMS 343 endif # NETWORK_FILESYSTEMS
425 344
426 source "fs/nls/Kconfig" 345 source "fs/nls/Kconfig"
427 source "fs/dlm/Kconfig" 346 source "fs/dlm/Kconfig"
428 source "fs/unicode/Kconfig" 347 source "fs/unicode/Kconfig"
429 348
430 config IO_WQ 349 config IO_WQ
431 bool 350 bool
432 351
433 endmenu 352 endmenu
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.