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