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