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/netfs/Kconfig"
>> 129 source "fs/fscache/Kconfig"
146 source "fs/cachefiles/Kconfig" 130 source "fs/cachefiles/Kconfig"
147 131
148 endmenu 132 endmenu
149 133
150 if BLOCK 134 if BLOCK
151 menu "CD-ROM/DVD Filesystems" 135 menu "CD-ROM/DVD Filesystems"
152 136
153 source "fs/isofs/Kconfig" 137 source "fs/isofs/Kconfig"
154 source "fs/udf/Kconfig" 138 source "fs/udf/Kconfig"
155 139
156 endmenu 140 endmenu
157 endif # BLOCK 141 endif # BLOCK
158 142
159 if BLOCK 143 if BLOCK
160 menu "DOS/FAT/EXFAT/NT Filesystems" 144 menu "DOS/FAT/EXFAT/NT Filesystems"
161 145
162 source "fs/fat/Kconfig" 146 source "fs/fat/Kconfig"
163 source "fs/exfat/Kconfig" 147 source "fs/exfat/Kconfig"
164 source "fs/ntfs3/Kconfig" !! 148 source "fs/ntfs/Kconfig"
165 149
166 endmenu 150 endmenu
167 endif # BLOCK 151 endif # BLOCK
168 152
169 menu "Pseudo filesystems" 153 menu "Pseudo filesystems"
170 154
171 source "fs/proc/Kconfig" 155 source "fs/proc/Kconfig"
172 source "fs/kernfs/Kconfig" 156 source "fs/kernfs/Kconfig"
173 source "fs/sysfs/Kconfig" 157 source "fs/sysfs/Kconfig"
174 158
175 config TMPFS 159 config TMPFS
176 bool "Tmpfs virtual memory file system 160 bool "Tmpfs virtual memory file system support (former shm fs)"
177 depends on SHMEM 161 depends on SHMEM
178 select MEMFD_CREATE <<
179 help 162 help
180 Tmpfs is a file system which keeps a 163 Tmpfs is a file system which keeps all files in virtual memory.
181 164
182 Everything in tmpfs is temporary in 165 Everything in tmpfs is temporary in the sense that no files will be
183 created on your hard drive. The file 166 created on your hard drive. The files live in memory and swap
184 space. If you unmount a tmpfs instan 167 space. If you unmount a tmpfs instance, everything stored therein is
185 lost. 168 lost.
186 169
187 See <file:Documentation/filesystems/ 170 See <file:Documentation/filesystems/tmpfs.rst> for details.
188 171
189 config TMPFS_POSIX_ACL 172 config TMPFS_POSIX_ACL
190 bool "Tmpfs POSIX Access Control Lists 173 bool "Tmpfs POSIX Access Control Lists"
191 depends on TMPFS 174 depends on TMPFS
192 select TMPFS_XATTR 175 select TMPFS_XATTR
193 select FS_POSIX_ACL 176 select FS_POSIX_ACL
194 help 177 help
195 POSIX Access Control Lists (ACLs) su 178 POSIX Access Control Lists (ACLs) support additional access rights
196 for users and groups beyond the stan 179 for users and groups beyond the standard owner/group/world scheme,
197 and this option selects support for 180 and this option selects support for ACLs specifically for tmpfs
198 filesystems. 181 filesystems.
199 182
200 If you've selected TMPFS, it's possi 183 If you've selected TMPFS, it's possible that you'll also need
201 this option as there are a number of 184 this option as there are a number of Linux distros that require
202 POSIX ACL support under /dev for cer 185 POSIX ACL support under /dev for certain features to work properly.
203 For example, some distros need this 186 For example, some distros need this feature for ALSA-related /dev
204 files for sound to work properly. I 187 files for sound to work properly. In short, if you're not sure,
205 say Y. 188 say Y.
206 189
207 config TMPFS_XATTR 190 config TMPFS_XATTR
208 bool "Tmpfs extended attributes" 191 bool "Tmpfs extended attributes"
209 depends on TMPFS 192 depends on TMPFS
210 default n 193 default n
211 help 194 help
212 Extended attributes are name:value p 195 Extended attributes are name:value pairs associated with inodes by
213 the kernel or by users (see the attr 196 the kernel or by users (see the attr(5) manual page for details).
214 197
215 This enables support for the trusted !! 198 Currently this enables support for the trusted.* and
216 namespaces. !! 199 security.* namespaces.
217 200
218 You need this for POSIX ACL support 201 You need this for POSIX ACL support on tmpfs.
219 202
220 If unsure, say N. 203 If unsure, say N.
221 204
222 config TMPFS_INODE64 205 config TMPFS_INODE64
223 bool "Use 64-bit ino_t by default in t 206 bool "Use 64-bit ino_t by default in tmpfs"
224 depends on TMPFS && 64BIT 207 depends on TMPFS && 64BIT
225 default n 208 default n
226 help 209 help
227 tmpfs has historically used only ino 210 tmpfs has historically used only inode numbers as wide as an unsigned
228 int. In some cases this can cause wr 211 int. In some cases this can cause wraparound, potentially resulting
229 in multiple files with the same inod 212 in multiple files with the same inode number on a single device. This
230 option makes tmpfs use the full widt 213 option makes tmpfs use the full width of ino_t by default, without
231 needing to specify the inode64 optio 214 needing to specify the inode64 option when mounting.
232 215
233 But if a long-lived tmpfs is to be a 216 But if a long-lived tmpfs is to be accessed by 32-bit applications so
234 ancient that opening a file larger t 217 ancient that opening a file larger than 2GiB fails with EINVAL, then
235 the INODE64 config option and inode6 218 the INODE64 config option and inode64 mount option risk operations
236 failing with EOVERFLOW once 33-bit i 219 failing with EOVERFLOW once 33-bit inode numbers are reached.
237 220
238 To override this configured default, 221 To override this configured default, use the inode32 or inode64
239 option when mounting. 222 option when mounting.
240 223
241 If unsure, say N. 224 If unsure, say N.
242 225
243 config TMPFS_QUOTA <<
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 226 config ARCH_SUPPORTS_HUGETLBFS
256 def_bool n 227 def_bool n
257 228
258 menuconfig HUGETLBFS !! 229 config HUGETLBFS
259 bool "HugeTLB file system support" 230 bool "HugeTLB file system support"
260 depends on X86 || SPARC64 || ARCH_SUPP !! 231 depends on X86 || IA64 || SPARC64 || (S390 && 64BIT) || \
261 depends on (SYSFS || SYSCTL) !! 232 ARCH_SUPPORTS_HUGETLBFS || BROKEN
262 select MEMFD_CREATE <<
263 select PADATA if SMP <<
264 help 233 help
265 hugetlbfs is a filesystem backing fo 234 hugetlbfs is a filesystem backing for HugeTLB pages, based on
266 ramfs. For architectures that suppor 235 ramfs. For architectures that support it, say Y here and read
267 <file:Documentation/admin-guide/mm/h 236 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
268 237
269 If unsure, say N. 238 If unsure, say N.
270 239
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 240 config HUGETLB_PAGE
283 def_bool HUGETLBFS 241 def_bool HUGETLBFS
284 select XARRAY_MULTI <<
285 242
286 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP !! 243 config MEMFD_CREATE
287 def_bool HUGETLB_PAGE !! 244 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 && <<
294 245
295 config ARCH_HAS_GIGANTIC_PAGE 246 config ARCH_HAS_GIGANTIC_PAGE
296 bool 247 bool
297 248
298 source "fs/configfs/Kconfig" 249 source "fs/configfs/Kconfig"
299 source "fs/efivarfs/Kconfig" 250 source "fs/efivarfs/Kconfig"
300 251
301 endmenu 252 endmenu
302 253
303 menuconfig MISC_FILESYSTEMS 254 menuconfig MISC_FILESYSTEMS
304 bool "Miscellaneous filesystems" 255 bool "Miscellaneous filesystems"
305 default y 256 default y
306 help 257 help
307 Say Y here to get to see options for 258 Say Y here to get to see options for various miscellaneous
308 filesystems, such as filesystems tha 259 filesystems, such as filesystems that came from other
309 operating systems. 260 operating systems.
310 261
311 This option alone does not add any k 262 This option alone does not add any kernel code.
312 263
313 If you say N, all options in this su 264 If you say N, all options in this submenu will be skipped and
314 disabled; if unsure, say Y here. 265 disabled; if unsure, say Y here.
315 266
316 if MISC_FILESYSTEMS 267 if MISC_FILESYSTEMS
317 268
318 source "fs/orangefs/Kconfig" 269 source "fs/orangefs/Kconfig"
319 source "fs/adfs/Kconfig" 270 source "fs/adfs/Kconfig"
320 source "fs/affs/Kconfig" 271 source "fs/affs/Kconfig"
321 source "fs/ecryptfs/Kconfig" 272 source "fs/ecryptfs/Kconfig"
322 source "fs/hfs/Kconfig" 273 source "fs/hfs/Kconfig"
323 source "fs/hfsplus/Kconfig" 274 source "fs/hfsplus/Kconfig"
324 source "fs/befs/Kconfig" 275 source "fs/befs/Kconfig"
325 source "fs/bfs/Kconfig" 276 source "fs/bfs/Kconfig"
326 source "fs/efs/Kconfig" 277 source "fs/efs/Kconfig"
327 source "fs/jffs2/Kconfig" 278 source "fs/jffs2/Kconfig"
328 # UBIFS File system configuration 279 # UBIFS File system configuration
329 source "fs/ubifs/Kconfig" 280 source "fs/ubifs/Kconfig"
330 source "fs/cramfs/Kconfig" 281 source "fs/cramfs/Kconfig"
331 source "fs/squashfs/Kconfig" 282 source "fs/squashfs/Kconfig"
332 source "fs/freevxfs/Kconfig" 283 source "fs/freevxfs/Kconfig"
333 source "fs/minix/Kconfig" 284 source "fs/minix/Kconfig"
334 source "fs/omfs/Kconfig" 285 source "fs/omfs/Kconfig"
335 source "fs/hpfs/Kconfig" 286 source "fs/hpfs/Kconfig"
336 source "fs/qnx4/Kconfig" 287 source "fs/qnx4/Kconfig"
337 source "fs/qnx6/Kconfig" 288 source "fs/qnx6/Kconfig"
338 source "fs/romfs/Kconfig" 289 source "fs/romfs/Kconfig"
339 source "fs/pstore/Kconfig" 290 source "fs/pstore/Kconfig"
340 source "fs/sysv/Kconfig" 291 source "fs/sysv/Kconfig"
341 source "fs/ufs/Kconfig" 292 source "fs/ufs/Kconfig"
342 source "fs/erofs/Kconfig" 293 source "fs/erofs/Kconfig"
343 source "fs/vboxsf/Kconfig" 294 source "fs/vboxsf/Kconfig"
344 295
345 endif # MISC_FILESYSTEMS 296 endif # MISC_FILESYSTEMS
346 297
347 menuconfig NETWORK_FILESYSTEMS 298 menuconfig NETWORK_FILESYSTEMS
348 bool "Network File Systems" 299 bool "Network File Systems"
349 default y 300 default y
350 depends on NET 301 depends on NET
351 help 302 help
352 Say Y here to get to see options for 303 Say Y here to get to see options for network filesystems and
353 filesystem-related networking code, 304 filesystem-related networking code, such as NFS daemon and
354 RPCSEC security modules. 305 RPCSEC security modules.
355 306
356 This option alone does not add any k 307 This option alone does not add any kernel code.
357 308
358 If you say N, all options in this su 309 If you say N, all options in this submenu will be skipped and
359 disabled; if unsure, say Y here. 310 disabled; if unsure, say Y here.
360 311
361 if NETWORK_FILESYSTEMS 312 if NETWORK_FILESYSTEMS
362 313
363 source "fs/nfs/Kconfig" 314 source "fs/nfs/Kconfig"
364 source "fs/nfsd/Kconfig" 315 source "fs/nfsd/Kconfig"
365 316
366 config GRACE_PERIOD 317 config GRACE_PERIOD
367 tristate 318 tristate
368 319
369 config LOCKD 320 config LOCKD
370 tristate 321 tristate
371 depends on FILE_LOCKING 322 depends on FILE_LOCKING
372 select GRACE_PERIOD 323 select GRACE_PERIOD
373 324
374 config LOCKD_V4 325 config LOCKD_V4
375 bool 326 bool
376 depends on NFSD || NFS_V3 !! 327 depends on NFSD_V3 || NFS_V3
377 depends on FILE_LOCKING 328 depends on FILE_LOCKING
378 default y 329 default y
379 330
380 config NFS_ACL_SUPPORT 331 config NFS_ACL_SUPPORT
381 tristate 332 tristate
382 select FS_POSIX_ACL 333 select FS_POSIX_ACL
383 334
384 config NFS_COMMON 335 config NFS_COMMON
385 bool 336 bool
386 depends on NFSD || NFS_FS || LOCKD 337 depends on NFSD || NFS_FS || LOCKD
387 default y 338 default y
388 339
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 340 config NFS_V4_2_SSC_HELPER
413 bool 341 bool
414 default y if NFS_V4_2 342 default y if NFS_V4_2
415 343
416 source "net/sunrpc/Kconfig" 344 source "net/sunrpc/Kconfig"
417 source "fs/ceph/Kconfig" 345 source "fs/ceph/Kconfig"
418 !! 346 source "fs/cifs/Kconfig"
419 source "fs/smb/Kconfig" <<
420 source "fs/coda/Kconfig" 347 source "fs/coda/Kconfig"
421 source "fs/afs/Kconfig" 348 source "fs/afs/Kconfig"
422 source "fs/9p/Kconfig" 349 source "fs/9p/Kconfig"
423 350
424 endif # NETWORK_FILESYSTEMS 351 endif # NETWORK_FILESYSTEMS
425 352
426 source "fs/nls/Kconfig" 353 source "fs/nls/Kconfig"
427 source "fs/dlm/Kconfig" 354 source "fs/dlm/Kconfig"
428 source "fs/unicode/Kconfig" 355 source "fs/unicode/Kconfig"
429 356
430 config IO_WQ 357 config IO_WQ
431 bool 358 bool
432 359
433 endmenu 360 endmenu
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