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 config FS_IOMAP
19 bool 19 bool
20 20
21 # Stackable filesystems 21 # Stackable filesystems
22 config FS_STACK 22 config FS_STACK
23 bool 23 bool
24 24
25 config BUFFER_HEAD 25 config BUFFER_HEAD
26 bool 26 bool
27 27
28 # old blockdev_direct_IO implementation. Use 28 # old blockdev_direct_IO implementation. Use iomap for new code instead
29 config LEGACY_DIRECT_IO 29 config LEGACY_DIRECT_IO
30 depends on BUFFER_HEAD 30 depends on BUFFER_HEAD
31 bool 31 bool
32 32
33 if BLOCK 33 if BLOCK
34 34
35 source "fs/ext2/Kconfig" 35 source "fs/ext2/Kconfig"
36 source "fs/ext4/Kconfig" 36 source "fs/ext4/Kconfig"
37 source "fs/jbd2/Kconfig" 37 source "fs/jbd2/Kconfig"
38 38
39 config FS_MBCACHE 39 config FS_MBCACHE
40 # Meta block cache for Extended Attributes (ex 40 # Meta block cache for Extended Attributes (ext2/ext3/ext4)
41 tristate 41 tristate
42 default y if EXT2_FS=y && EXT2_FS_XATT 42 default y if EXT2_FS=y && EXT2_FS_XATTR
43 default y if EXT4_FS=y 43 default y if EXT4_FS=y
44 default m if EXT2_FS_XATTR || EXT4_FS 44 default m if EXT2_FS_XATTR || EXT4_FS
45 45
46 source "fs/reiserfs/Kconfig" 46 source "fs/reiserfs/Kconfig"
47 source "fs/jfs/Kconfig" 47 source "fs/jfs/Kconfig"
48 48
49 source "fs/xfs/Kconfig" 49 source "fs/xfs/Kconfig"
50 source "fs/gfs2/Kconfig" 50 source "fs/gfs2/Kconfig"
51 source "fs/ocfs2/Kconfig" 51 source "fs/ocfs2/Kconfig"
52 source "fs/btrfs/Kconfig" 52 source "fs/btrfs/Kconfig"
53 source "fs/nilfs2/Kconfig" 53 source "fs/nilfs2/Kconfig"
54 source "fs/f2fs/Kconfig" 54 source "fs/f2fs/Kconfig"
55 source "fs/bcachefs/Kconfig" 55 source "fs/bcachefs/Kconfig"
56 source "fs/zonefs/Kconfig" 56 source "fs/zonefs/Kconfig"
57 57
58 endif # BLOCK 58 endif # BLOCK
59 59
60 config FS_DAX 60 config FS_DAX
61 bool "File system based Direct Access 61 bool "File system based Direct Access (DAX) support"
62 depends on MMU 62 depends on MMU
63 depends on ZONE_DEVICE || FS_DAX_LIMIT 63 depends on ZONE_DEVICE || FS_DAX_LIMITED
64 select FS_IOMAP 64 select FS_IOMAP
65 select DAX 65 select DAX
66 help 66 help
67 Direct Access (DAX) can be used on m 67 Direct Access (DAX) can be used on memory-backed block devices.
68 If the block device supports DAX and 68 If the block device supports DAX and the filesystem supports DAX,
69 then you can avoid using the pagecac 69 then you can avoid using the pagecache to buffer I/Os. Turning
70 on this option will compile in suppo 70 on this option will compile in support for DAX.
71 71
72 For a DAX device to support file sys 72 For a DAX device to support file system access it needs to have
73 struct pages. For the nfit based NV 73 struct pages. For the nfit based NVDIMMs this can be enabled
74 using the ndctl utility: 74 using the ndctl utility:
75 75
76 # ndctl create-namespace --for 76 # ndctl create-namespace --force --reconfig=namespace0.0 \
77 --mode=fsdax --map=mem 77 --mode=fsdax --map=mem
78 78
79 See the 'create-namespace' man page 79 See the 'create-namespace' man page for details on the overhead of
80 --map=mem: 80 --map=mem:
81 https://docs.pmem.io/ndctl-user-guid 81 https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
82 82
83 For ndctl to work CONFIG_DEV_DAX nee 83 For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
84 file systems DAX support needs to be 84 file systems DAX support needs to be manually enabled globally or
85 per-inode using a mount option as we 85 per-inode using a mount option as well. See the file documentation in
86 Documentation/filesystems/dax.rst fo 86 Documentation/filesystems/dax.rst for details.
87 87
88 If you do not have a block device th 88 If you do not have a block device that is capable of using this,
89 or if unsure, say N. Saying Y will 89 or if unsure, say N. Saying Y will increase the size of the kernel
90 by about 5kB. 90 by about 5kB.
91 91
92 config FS_DAX_PMD 92 config FS_DAX_PMD
93 bool 93 bool
94 default FS_DAX 94 default FS_DAX
95 depends on FS_DAX 95 depends on FS_DAX
96 depends on ZONE_DEVICE 96 depends on ZONE_DEVICE
97 depends on TRANSPARENT_HUGEPAGE 97 depends on TRANSPARENT_HUGEPAGE
98 98
99 # Selected by DAX drivers that do not expect f 99 # Selected by DAX drivers that do not expect filesystem DAX to support
100 # get_user_pages() of DAX mappings. I.e. "limi 100 # get_user_pages() of DAX mappings. I.e. "limited" indicates no support
101 # for fork() of processes with MAP_SHARED mapp 101 # for fork() of processes with MAP_SHARED mappings or support for
102 # direct-I/O to a DAX mapping. 102 # direct-I/O to a DAX mapping.
103 config FS_DAX_LIMITED 103 config FS_DAX_LIMITED
104 bool 104 bool
105 105
106 # Posix ACL utility routines 106 # Posix ACL utility routines
107 # 107 #
108 # Note: Posix ACLs can be implemented without 108 # Note: Posix ACLs can be implemented without these helpers. Never use
109 # this symbol for ifdefs in core code. 109 # this symbol for ifdefs in core code.
110 # 110 #
111 config FS_POSIX_ACL 111 config FS_POSIX_ACL
112 def_bool n 112 def_bool n
113 113
114 config EXPORTFS 114 config EXPORTFS
115 tristate 115 tristate
116 116
117 config EXPORTFS_BLOCK_OPS 117 config EXPORTFS_BLOCK_OPS
118 bool "Enable filesystem export operati 118 bool "Enable filesystem export operations for block IO"
119 help 119 help
120 This option enables the export opera 120 This option enables the export operations for a filesystem to support
121 external block IO. 121 external block IO.
122 122
123 config FILE_LOCKING 123 config FILE_LOCKING
124 bool "Enable POSIX file locking API" i 124 bool "Enable POSIX file locking API" if EXPERT
125 default y 125 default y
126 help 126 help
127 This option enables standard file lo 127 This option enables standard file locking support, required
128 for filesystems like NFS and for the 128 for filesystems like NFS and for the flock() system
129 call. Disabling this option saves ab 129 call. Disabling this option saves about 11k.
130 130
131 source "fs/crypto/Kconfig" 131 source "fs/crypto/Kconfig"
132 132
133 source "fs/verity/Kconfig" 133 source "fs/verity/Kconfig"
134 134
135 source "fs/notify/Kconfig" 135 source "fs/notify/Kconfig"
136 136
137 source "fs/quota/Kconfig" 137 source "fs/quota/Kconfig"
138 138
139 source "fs/autofs/Kconfig" 139 source "fs/autofs/Kconfig"
140 source "fs/fuse/Kconfig" 140 source "fs/fuse/Kconfig"
141 source "fs/overlayfs/Kconfig" 141 source "fs/overlayfs/Kconfig"
142 142
143 menu "Caches" 143 menu "Caches"
144 144
145 source "fs/netfs/Kconfig" 145 source "fs/netfs/Kconfig"
146 source "fs/cachefiles/Kconfig" 146 source "fs/cachefiles/Kconfig"
147 147
148 endmenu 148 endmenu
149 149
150 if BLOCK 150 if BLOCK
151 menu "CD-ROM/DVD Filesystems" 151 menu "CD-ROM/DVD Filesystems"
152 152
153 source "fs/isofs/Kconfig" 153 source "fs/isofs/Kconfig"
154 source "fs/udf/Kconfig" 154 source "fs/udf/Kconfig"
155 155
156 endmenu 156 endmenu
157 endif # BLOCK 157 endif # BLOCK
158 158
159 if BLOCK 159 if BLOCK
160 menu "DOS/FAT/EXFAT/NT Filesystems" 160 menu "DOS/FAT/EXFAT/NT Filesystems"
161 161
162 source "fs/fat/Kconfig" 162 source "fs/fat/Kconfig"
163 source "fs/exfat/Kconfig" 163 source "fs/exfat/Kconfig"
164 source "fs/ntfs3/Kconfig" 164 source "fs/ntfs3/Kconfig"
165 165
166 endmenu 166 endmenu
167 endif # BLOCK 167 endif # BLOCK
168 168
169 menu "Pseudo filesystems" 169 menu "Pseudo filesystems"
170 170
171 source "fs/proc/Kconfig" 171 source "fs/proc/Kconfig"
172 source "fs/kernfs/Kconfig" 172 source "fs/kernfs/Kconfig"
173 source "fs/sysfs/Kconfig" 173 source "fs/sysfs/Kconfig"
174 174
175 config TMPFS 175 config TMPFS
176 bool "Tmpfs virtual memory file system 176 bool "Tmpfs virtual memory file system support (former shm fs)"
177 depends on SHMEM 177 depends on SHMEM
178 select MEMFD_CREATE 178 select MEMFD_CREATE
179 help 179 help
180 Tmpfs is a file system which keeps a 180 Tmpfs is a file system which keeps all files in virtual memory.
181 181
182 Everything in tmpfs is temporary in 182 Everything in tmpfs is temporary in the sense that no files will be
183 created on your hard drive. The file 183 created on your hard drive. The files live in memory and swap
184 space. If you unmount a tmpfs instan 184 space. If you unmount a tmpfs instance, everything stored therein is
185 lost. 185 lost.
186 186
187 See <file:Documentation/filesystems/ 187 See <file:Documentation/filesystems/tmpfs.rst> for details.
188 188
189 config TMPFS_POSIX_ACL 189 config TMPFS_POSIX_ACL
190 bool "Tmpfs POSIX Access Control Lists 190 bool "Tmpfs POSIX Access Control Lists"
191 depends on TMPFS 191 depends on TMPFS
192 select TMPFS_XATTR 192 select TMPFS_XATTR
193 select FS_POSIX_ACL 193 select FS_POSIX_ACL
194 help 194 help
195 POSIX Access Control Lists (ACLs) su 195 POSIX Access Control Lists (ACLs) support additional access rights
196 for users and groups beyond the stan 196 for users and groups beyond the standard owner/group/world scheme,
197 and this option selects support for 197 and this option selects support for ACLs specifically for tmpfs
198 filesystems. 198 filesystems.
199 199
200 If you've selected TMPFS, it's possi 200 If you've selected TMPFS, it's possible that you'll also need
201 this option as there are a number of 201 this option as there are a number of Linux distros that require
202 POSIX ACL support under /dev for cer 202 POSIX ACL support under /dev for certain features to work properly.
203 For example, some distros need this 203 For example, some distros need this feature for ALSA-related /dev
204 files for sound to work properly. I 204 files for sound to work properly. In short, if you're not sure,
205 say Y. 205 say Y.
206 206
207 config TMPFS_XATTR 207 config TMPFS_XATTR
208 bool "Tmpfs extended attributes" 208 bool "Tmpfs extended attributes"
209 depends on TMPFS 209 depends on TMPFS
210 default n 210 default n
211 help 211 help
212 Extended attributes are name:value p 212 Extended attributes are name:value pairs associated with inodes by
213 the kernel or by users (see the attr 213 the kernel or by users (see the attr(5) manual page for details).
214 214
215 This enables support for the trusted 215 This enables support for the trusted.*, security.* and user.*
216 namespaces. 216 namespaces.
217 217
218 You need this for POSIX ACL support 218 You need this for POSIX ACL support on tmpfs.
219 219
220 If unsure, say N. 220 If unsure, say N.
221 221
222 config TMPFS_INODE64 222 config TMPFS_INODE64
223 bool "Use 64-bit ino_t by default in t 223 bool "Use 64-bit ino_t by default in tmpfs"
224 depends on TMPFS && 64BIT 224 depends on TMPFS && 64BIT
225 default n 225 default n
226 help 226 help
227 tmpfs has historically used only ino 227 tmpfs has historically used only inode numbers as wide as an unsigned
228 int. In some cases this can cause wr 228 int. In some cases this can cause wraparound, potentially resulting
229 in multiple files with the same inod 229 in multiple files with the same inode number on a single device. This
230 option makes tmpfs use the full widt 230 option makes tmpfs use the full width of ino_t by default, without
231 needing to specify the inode64 optio 231 needing to specify the inode64 option when mounting.
232 232
233 But if a long-lived tmpfs is to be a 233 But if a long-lived tmpfs is to be accessed by 32-bit applications so
234 ancient that opening a file larger t 234 ancient that opening a file larger than 2GiB fails with EINVAL, then
235 the INODE64 config option and inode6 235 the INODE64 config option and inode64 mount option risk operations
236 failing with EOVERFLOW once 33-bit i 236 failing with EOVERFLOW once 33-bit inode numbers are reached.
237 237
238 To override this configured default, 238 To override this configured default, use the inode32 or inode64
239 option when mounting. 239 option when mounting.
240 240
241 If unsure, say N. 241 If unsure, say N.
242 242
243 config TMPFS_QUOTA 243 config TMPFS_QUOTA
244 bool "Tmpfs quota support" 244 bool "Tmpfs quota support"
245 depends on TMPFS 245 depends on TMPFS
246 select QUOTA 246 select QUOTA
247 help 247 help
248 Quota support allows to set per user 248 Quota support allows to set per user and group limits for tmpfs
249 usage. Say Y to enable quota suppor 249 usage. Say Y to enable quota support. Once enabled you can control
250 user and group quota enforcement wit 250 user and group quota enforcement with quota, usrquota and grpquota
251 mount options. 251 mount options.
252 252
253 If unsure, say N. 253 If unsure, say N.
254 254
255 config ARCH_SUPPORTS_HUGETLBFS 255 config ARCH_SUPPORTS_HUGETLBFS
256 def_bool n 256 def_bool n
257 257
258 menuconfig HUGETLBFS 258 menuconfig HUGETLBFS
259 bool "HugeTLB file system support" 259 bool "HugeTLB file system support"
260 depends on X86 || SPARC64 || ARCH_SUPP 260 depends on X86 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
261 depends on (SYSFS || SYSCTL) 261 depends on (SYSFS || SYSCTL)
262 select MEMFD_CREATE 262 select MEMFD_CREATE
263 select PADATA if SMP 263 select PADATA if SMP
264 help 264 help
265 hugetlbfs is a filesystem backing fo 265 hugetlbfs is a filesystem backing for HugeTLB pages, based on
266 ramfs. For architectures that suppor 266 ramfs. For architectures that support it, say Y here and read
267 <file:Documentation/admin-guide/mm/h 267 <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
268 268
269 If unsure, say N. 269 If unsure, say N.
270 270
271 if HUGETLBFS 271 if HUGETLBFS
272 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_O 272 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
273 bool "HugeTLB Vmemmap Optimization (HV 273 bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
274 default n 274 default n
275 depends on HUGETLB_PAGE_OPTIMIZE_VMEMM 275 depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
276 help 276 help
277 The HugeTLB Vmemmap Optimization (HV 277 The HugeTLB Vmemmap Optimization (HVO) defaults to off. Say Y here to
278 enable HVO by default. It can be dis 278 enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
279 (boot command line) or hugetlb_optim 279 (boot command line) or hugetlb_optimize_vmemmap (sysctl).
280 endif # HUGETLBFS 280 endif # HUGETLBFS
281 281
282 config HUGETLB_PAGE 282 config HUGETLB_PAGE
283 def_bool HUGETLBFS 283 def_bool HUGETLBFS
284 select XARRAY_MULTI 284 select XARRAY_MULTI
285 285
286 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP 286 config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
287 def_bool HUGETLB_PAGE 287 def_bool HUGETLB_PAGE
288 depends on ARCH_WANT_OPTIMIZE_HUGETLB_ 288 depends on ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
289 depends on SPARSEMEM_VMEMMAP 289 depends on SPARSEMEM_VMEMMAP
290 290
291 config HUGETLB_PMD_PAGE_TABLE_SHARING 291 config HUGETLB_PMD_PAGE_TABLE_SHARING
292 def_bool HUGETLB_PAGE 292 def_bool HUGETLB_PAGE
293 depends on ARCH_WANT_HUGE_PMD_SHARE && 293 depends on ARCH_WANT_HUGE_PMD_SHARE && SPLIT_PMD_PTLOCKS
294 294
295 config ARCH_HAS_GIGANTIC_PAGE 295 config ARCH_HAS_GIGANTIC_PAGE
296 bool 296 bool
297 297
298 source "fs/configfs/Kconfig" 298 source "fs/configfs/Kconfig"
299 source "fs/efivarfs/Kconfig" 299 source "fs/efivarfs/Kconfig"
300 300
301 endmenu 301 endmenu
302 302
303 menuconfig MISC_FILESYSTEMS 303 menuconfig MISC_FILESYSTEMS
304 bool "Miscellaneous filesystems" 304 bool "Miscellaneous filesystems"
305 default y 305 default y
306 help 306 help
307 Say Y here to get to see options for 307 Say Y here to get to see options for various miscellaneous
308 filesystems, such as filesystems tha 308 filesystems, such as filesystems that came from other
309 operating systems. 309 operating systems.
310 310
311 This option alone does not add any k 311 This option alone does not add any kernel code.
312 312
313 If you say N, all options in this su 313 If you say N, all options in this submenu will be skipped and
314 disabled; if unsure, say Y here. 314 disabled; if unsure, say Y here.
315 315
316 if MISC_FILESYSTEMS 316 if MISC_FILESYSTEMS
317 317
318 source "fs/orangefs/Kconfig" 318 source "fs/orangefs/Kconfig"
319 source "fs/adfs/Kconfig" 319 source "fs/adfs/Kconfig"
320 source "fs/affs/Kconfig" 320 source "fs/affs/Kconfig"
321 source "fs/ecryptfs/Kconfig" 321 source "fs/ecryptfs/Kconfig"
322 source "fs/hfs/Kconfig" 322 source "fs/hfs/Kconfig"
323 source "fs/hfsplus/Kconfig" 323 source "fs/hfsplus/Kconfig"
324 source "fs/befs/Kconfig" 324 source "fs/befs/Kconfig"
325 source "fs/bfs/Kconfig" 325 source "fs/bfs/Kconfig"
326 source "fs/efs/Kconfig" 326 source "fs/efs/Kconfig"
327 source "fs/jffs2/Kconfig" 327 source "fs/jffs2/Kconfig"
328 # UBIFS File system configuration 328 # UBIFS File system configuration
329 source "fs/ubifs/Kconfig" 329 source "fs/ubifs/Kconfig"
330 source "fs/cramfs/Kconfig" 330 source "fs/cramfs/Kconfig"
331 source "fs/squashfs/Kconfig" 331 source "fs/squashfs/Kconfig"
332 source "fs/freevxfs/Kconfig" 332 source "fs/freevxfs/Kconfig"
333 source "fs/minix/Kconfig" 333 source "fs/minix/Kconfig"
334 source "fs/omfs/Kconfig" 334 source "fs/omfs/Kconfig"
335 source "fs/hpfs/Kconfig" 335 source "fs/hpfs/Kconfig"
336 source "fs/qnx4/Kconfig" 336 source "fs/qnx4/Kconfig"
337 source "fs/qnx6/Kconfig" 337 source "fs/qnx6/Kconfig"
338 source "fs/romfs/Kconfig" 338 source "fs/romfs/Kconfig"
339 source "fs/pstore/Kconfig" 339 source "fs/pstore/Kconfig"
340 source "fs/sysv/Kconfig" 340 source "fs/sysv/Kconfig"
341 source "fs/ufs/Kconfig" 341 source "fs/ufs/Kconfig"
342 source "fs/erofs/Kconfig" 342 source "fs/erofs/Kconfig"
343 source "fs/vboxsf/Kconfig" 343 source "fs/vboxsf/Kconfig"
344 344
345 endif # MISC_FILESYSTEMS 345 endif # MISC_FILESYSTEMS
346 346
347 menuconfig NETWORK_FILESYSTEMS 347 menuconfig NETWORK_FILESYSTEMS
348 bool "Network File Systems" 348 bool "Network File Systems"
349 default y 349 default y
350 depends on NET 350 depends on NET
351 help 351 help
352 Say Y here to get to see options for 352 Say Y here to get to see options for network filesystems and
353 filesystem-related networking code, 353 filesystem-related networking code, such as NFS daemon and
354 RPCSEC security modules. 354 RPCSEC security modules.
355 355
356 This option alone does not add any k 356 This option alone does not add any kernel code.
357 357
358 If you say N, all options in this su 358 If you say N, all options in this submenu will be skipped and
359 disabled; if unsure, say Y here. 359 disabled; if unsure, say Y here.
360 360
361 if NETWORK_FILESYSTEMS 361 if NETWORK_FILESYSTEMS
362 362
363 source "fs/nfs/Kconfig" 363 source "fs/nfs/Kconfig"
364 source "fs/nfsd/Kconfig" 364 source "fs/nfsd/Kconfig"
365 365
366 config GRACE_PERIOD 366 config GRACE_PERIOD
367 tristate 367 tristate
368 368
369 config LOCKD 369 config LOCKD
370 tristate 370 tristate
371 depends on FILE_LOCKING 371 depends on FILE_LOCKING
372 select GRACE_PERIOD 372 select GRACE_PERIOD
373 373
374 config LOCKD_V4 374 config LOCKD_V4
375 bool 375 bool
376 depends on NFSD || NFS_V3 376 depends on NFSD || NFS_V3
377 depends on FILE_LOCKING 377 depends on FILE_LOCKING
378 default y 378 default y
379 379
380 config NFS_ACL_SUPPORT 380 config NFS_ACL_SUPPORT
381 tristate 381 tristate
382 select FS_POSIX_ACL 382 select FS_POSIX_ACL
383 383
384 config NFS_COMMON 384 config NFS_COMMON
385 bool 385 bool
386 depends on NFSD || NFS_FS || LOCKD 386 depends on NFSD || NFS_FS || LOCKD
387 default y 387 default y
388 388
389 config NFS_COMMON_LOCALIO_SUPPORT 389 config NFS_COMMON_LOCALIO_SUPPORT
390 tristate 390 tristate
391 depends on NFS_LOCALIO 391 depends on NFS_LOCALIO
392 default y if NFSD=y || NFS_FS=y 392 default y if NFSD=y || NFS_FS=y
393 default m if NFSD=m && NFS_FS=m 393 default m if NFSD=m && NFS_FS=m
394 select SUNRPC 394 select SUNRPC
395 395
396 config NFS_LOCALIO 396 config NFS_LOCALIO
397 bool "NFS client and server support fo 397 bool "NFS client and server support for LOCALIO auxiliary protocol"
398 depends on NFSD && NFS_FS 398 depends on NFSD && NFS_FS
399 select NFS_COMMON_LOCALIO_SUPPORT 399 select NFS_COMMON_LOCALIO_SUPPORT
400 default n 400 default n
401 help 401 help
402 Some NFS servers support an auxiliar 402 Some NFS servers support an auxiliary NFS LOCALIO protocol
403 that is not an official part of the 403 that is not an official part of the NFS protocol.
404 404
405 This option enables support for the 405 This option enables support for the LOCALIO protocol in the
406 kernel's NFS server and client. Enab 406 kernel's NFS server and client. Enable this to permit local
407 NFS clients to bypass the network wh 407 NFS clients to bypass the network when issuing reads and
408 writes to the local NFS server. 408 writes to the local NFS server.
409 409
410 If unsure, say N. 410 If unsure, say N.
411 411
412 config NFS_V4_2_SSC_HELPER 412 config NFS_V4_2_SSC_HELPER
413 bool 413 bool
414 default y if NFS_V4_2 414 default y if NFS_V4_2
415 415
416 source "net/sunrpc/Kconfig" 416 source "net/sunrpc/Kconfig"
417 source "fs/ceph/Kconfig" 417 source "fs/ceph/Kconfig"
418 418
419 source "fs/smb/Kconfig" 419 source "fs/smb/Kconfig"
420 source "fs/coda/Kconfig" 420 source "fs/coda/Kconfig"
421 source "fs/afs/Kconfig" 421 source "fs/afs/Kconfig"
422 source "fs/9p/Kconfig" 422 source "fs/9p/Kconfig"
423 423
424 endif # NETWORK_FILESYSTEMS 424 endif # NETWORK_FILESYSTEMS
425 425
426 source "fs/nls/Kconfig" 426 source "fs/nls/Kconfig"
427 source "fs/dlm/Kconfig" 427 source "fs/dlm/Kconfig"
428 source "fs/unicode/Kconfig" 428 source "fs/unicode/Kconfig"
429 429
430 config IO_WQ 430 config IO_WQ
431 bool 431 bool
432 432
433 endmenu 433 endmenu
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