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