xref: /openbmc/linux/fs/Kconfig (revision d28a1de5) 
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# File system configuration
4#
5
6menu "File systems"
7
8# Use unaligned word dcache accesses
9config DCACHE_WORD_ACCESS
10       bool
11
12config VALIDATE_FS_PARSER
13	bool "Validate filesystem parameter description"
14	help
15	  Enable this to perform validation of the parameter description for a
16	  filesystem when it is registered.
17
18config FS_IOMAP
19	bool
20
21if BLOCK
22
23source "fs/ext2/Kconfig"
24source "fs/ext4/Kconfig"
25source "fs/jbd2/Kconfig"
26
27config FS_MBCACHE
28# Meta block cache for Extended Attributes (ext2/ext3/ext4)
29	tristate
30	default y if EXT2_FS=y && EXT2_FS_XATTR
31	default y if EXT4_FS=y
32	default m if EXT2_FS_XATTR || EXT4_FS
33
34source "fs/reiserfs/Kconfig"
35source "fs/jfs/Kconfig"
36
37source "fs/xfs/Kconfig"
38source "fs/gfs2/Kconfig"
39source "fs/ocfs2/Kconfig"
40source "fs/btrfs/Kconfig"
41source "fs/nilfs2/Kconfig"
42source "fs/f2fs/Kconfig"
43source "fs/zonefs/Kconfig"
44
45endif # BLOCK
46
47config FS_DAX
48	bool "File system based Direct Access (DAX) support"
49	depends on MMU
50	depends on !(ARM || MIPS || SPARC)
51	depends on ZONE_DEVICE || FS_DAX_LIMITED
52	select FS_IOMAP
53	select DAX
54	help
55	  Direct Access (DAX) can be used on memory-backed block devices.
56	  If the block device supports DAX and the filesystem supports DAX,
57	  then you can avoid using the pagecache to buffer I/Os.  Turning
58	  on this option will compile in support for DAX.
59
60	  For a DAX device to support file system access it needs to have
61	  struct pages.  For the nfit based NVDIMMs this can be enabled
62	  using the ndctl utility:
63
64		# ndctl create-namespace --force --reconfig=namespace0.0 \
65			--mode=fsdax --map=mem
66
67	  See the 'create-namespace' man page for details on the overhead of
68	  --map=mem:
69	  https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
70
71          For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
72	  file systems DAX support needs to be manually enabled globally or
73	  per-inode using a mount option as well.  See the file documentation in
74	  Documentation/filesystems/dax.rst for details.
75
76	  If you do not have a block device that is capable of using this,
77	  or if unsure, say N.  Saying Y will increase the size of the kernel
78	  by about 5kB.
79
80config FS_DAX_PMD
81	bool
82	default FS_DAX
83	depends on FS_DAX
84	depends on ZONE_DEVICE
85	depends on TRANSPARENT_HUGEPAGE
86
87# Selected by DAX drivers that do not expect filesystem DAX to support
88# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
89# for fork() of processes with MAP_SHARED mappings or support for
90# direct-I/O to a DAX mapping.
91config FS_DAX_LIMITED
92	bool
93
94# Posix ACL utility routines
95#
96# Note: Posix ACLs can be implemented without these helpers.  Never use
97# this symbol for ifdefs in core code.
98#
99config FS_POSIX_ACL
100	def_bool n
101
102config EXPORTFS
103	tristate
104
105config EXPORTFS_BLOCK_OPS
106	bool "Enable filesystem export operations for block IO"
107	help
108	  This option enables the export operations for a filesystem to support
109	  external block IO.
110
111config FILE_LOCKING
112	bool "Enable POSIX file locking API" if EXPERT
113	default y
114	help
115	  This option enables standard file locking support, required
116          for filesystems like NFS and for the flock() system
117          call. Disabling this option saves about 11k.
118
119source "fs/crypto/Kconfig"
120
121source "fs/verity/Kconfig"
122
123source "fs/notify/Kconfig"
124
125source "fs/quota/Kconfig"
126
127source "fs/autofs/Kconfig"
128source "fs/fuse/Kconfig"
129source "fs/overlayfs/Kconfig"
130
131menu "Caches"
132
133source "fs/netfs/Kconfig"
134source "fs/fscache/Kconfig"
135source "fs/cachefiles/Kconfig"
136
137endmenu
138
139if BLOCK
140menu "CD-ROM/DVD Filesystems"
141
142source "fs/isofs/Kconfig"
143source "fs/udf/Kconfig"
144
145endmenu
146endif # BLOCK
147
148if BLOCK
149menu "DOS/FAT/EXFAT/NT Filesystems"
150
151source "fs/fat/Kconfig"
152source "fs/exfat/Kconfig"
153source "fs/ntfs/Kconfig"
154source "fs/ntfs3/Kconfig"
155
156endmenu
157endif # BLOCK
158
159menu "Pseudo filesystems"
160
161source "fs/proc/Kconfig"
162source "fs/kernfs/Kconfig"
163source "fs/sysfs/Kconfig"
164
165config TMPFS
166	bool "Tmpfs virtual memory file system support (former shm fs)"
167	depends on SHMEM
168	help
169	  Tmpfs is a file system which keeps all files in virtual memory.
170
171	  Everything in tmpfs is temporary in the sense that no files will be
172	  created on your hard drive. The files live in memory and swap
173	  space. If you unmount a tmpfs instance, everything stored therein is
174	  lost.
175
176	  See <file:Documentation/filesystems/tmpfs.rst> for details.
177
178config TMPFS_POSIX_ACL
179	bool "Tmpfs POSIX Access Control Lists"
180	depends on TMPFS
181	select TMPFS_XATTR
182	select FS_POSIX_ACL
183	help
184	  POSIX Access Control Lists (ACLs) support additional access rights
185	  for users and groups beyond the standard owner/group/world scheme,
186	  and this option selects support for ACLs specifically for tmpfs
187	  filesystems.
188
189	  If you've selected TMPFS, it's possible that you'll also need
190	  this option as there are a number of Linux distros that require
191	  POSIX ACL support under /dev for certain features to work properly.
192	  For example, some distros need this feature for ALSA-related /dev
193	  files for sound to work properly.  In short, if you're not sure,
194	  say Y.
195
196config TMPFS_XATTR
197	bool "Tmpfs extended attributes"
198	depends on TMPFS
199	default n
200	help
201	  Extended attributes are name:value pairs associated with inodes by
202	  the kernel or by users (see the attr(5) manual page for details).
203
204	  Currently this enables support for the trusted.* and
205	  security.* namespaces.
206
207	  You need this for POSIX ACL support on tmpfs.
208
209	  If unsure, say N.
210
211config TMPFS_INODE64
212	bool "Use 64-bit ino_t by default in tmpfs"
213	depends on TMPFS && 64BIT
214	default n
215	help
216	  tmpfs has historically used only inode numbers as wide as an unsigned
217	  int. In some cases this can cause wraparound, potentially resulting
218	  in multiple files with the same inode number on a single device. This
219	  option makes tmpfs use the full width of ino_t by default, without
220	  needing to specify the inode64 option when mounting.
221
222	  But if a long-lived tmpfs is to be accessed by 32-bit applications so
223	  ancient that opening a file larger than 2GiB fails with EINVAL, then
224	  the INODE64 config option and inode64 mount option risk operations
225	  failing with EOVERFLOW once 33-bit inode numbers are reached.
226
227	  To override this configured default, use the inode32 or inode64
228	  option when mounting.
229
230	  If unsure, say N.
231
232config ARCH_SUPPORTS_HUGETLBFS
233	def_bool n
234
235config HUGETLBFS
236	bool "HugeTLB file system support"
237	depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
238	depends on (SYSFS || SYSCTL)
239	help
240	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
241	  ramfs. For architectures that support it, say Y here and read
242	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
243
244	  If unsure, say N.
245
246config HUGETLB_PAGE
247	def_bool HUGETLBFS
248
249#
250# Select this config option from the architecture Kconfig, if it is preferred
251# to enable the feature of HugeTLB Vmemmap Optimization (HVO).
252#
253config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
254	bool
255
256config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
257	def_bool HUGETLB_PAGE
258	depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
259	depends on SPARSEMEM_VMEMMAP
260
261config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
262	bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
263	default n
264	depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
265	help
266	  The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
267	  enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
268	  (boot command line) or hugetlb_optimize_vmemmap (sysctl).
269
270config MEMFD_CREATE
271	def_bool TMPFS || HUGETLBFS
272
273config ARCH_HAS_GIGANTIC_PAGE
274	bool
275
276source "fs/configfs/Kconfig"
277source "fs/efivarfs/Kconfig"
278
279endmenu
280
281menuconfig MISC_FILESYSTEMS
282	bool "Miscellaneous filesystems"
283	default y
284	help
285	  Say Y here to get to see options for various miscellaneous
286	  filesystems, such as filesystems that came from other
287	  operating systems.
288
289	  This option alone does not add any kernel code.
290
291	  If you say N, all options in this submenu will be skipped and
292	  disabled; if unsure, say Y here.
293
294if MISC_FILESYSTEMS
295
296source "fs/orangefs/Kconfig"
297source "fs/adfs/Kconfig"
298source "fs/affs/Kconfig"
299source "fs/ecryptfs/Kconfig"
300source "fs/hfs/Kconfig"
301source "fs/hfsplus/Kconfig"
302source "fs/befs/Kconfig"
303source "fs/bfs/Kconfig"
304source "fs/efs/Kconfig"
305source "fs/jffs2/Kconfig"
306# UBIFS File system configuration
307source "fs/ubifs/Kconfig"
308source "fs/cramfs/Kconfig"
309source "fs/squashfs/Kconfig"
310source "fs/freevxfs/Kconfig"
311source "fs/minix/Kconfig"
312source "fs/omfs/Kconfig"
313source "fs/hpfs/Kconfig"
314source "fs/qnx4/Kconfig"
315source "fs/qnx6/Kconfig"
316source "fs/romfs/Kconfig"
317source "fs/pstore/Kconfig"
318source "fs/sysv/Kconfig"
319source "fs/ufs/Kconfig"
320source "fs/erofs/Kconfig"
321source "fs/vboxsf/Kconfig"
322
323endif # MISC_FILESYSTEMS
324
325menuconfig NETWORK_FILESYSTEMS
326	bool "Network File Systems"
327	default y
328	depends on NET
329	help
330	  Say Y here to get to see options for network filesystems and
331	  filesystem-related networking code, such as NFS daemon and
332	  RPCSEC security modules.
333
334	  This option alone does not add any kernel code.
335
336	  If you say N, all options in this submenu will be skipped and
337	  disabled; if unsure, say Y here.
338
339if NETWORK_FILESYSTEMS
340
341source "fs/nfs/Kconfig"
342source "fs/nfsd/Kconfig"
343
344config GRACE_PERIOD
345	tristate
346
347config LOCKD
348	tristate
349	depends on FILE_LOCKING
350	select GRACE_PERIOD
351
352config LOCKD_V4
353	bool
354	depends on NFSD || NFS_V3
355	depends on FILE_LOCKING
356	default y
357
358config NFS_ACL_SUPPORT
359	tristate
360	select FS_POSIX_ACL
361
362config NFS_COMMON
363	bool
364	depends on NFSD || NFS_FS || LOCKD
365	default y
366
367config NFS_V4_2_SSC_HELPER
368	bool
369	default y if NFS_V4_2
370
371source "net/sunrpc/Kconfig"
372source "fs/ceph/Kconfig"
373
374source "fs/cifs/Kconfig"
375source "fs/ksmbd/Kconfig"
376
377config SMBFS_COMMON
378	tristate
379	default y if CIFS=y || SMB_SERVER=y
380	default m if CIFS=m || SMB_SERVER=m
381
382source "fs/coda/Kconfig"
383source "fs/afs/Kconfig"
384source "fs/9p/Kconfig"
385
386endif # NETWORK_FILESYSTEMS
387
388source "fs/nls/Kconfig"
389source "fs/dlm/Kconfig"
390source "fs/unicode/Kconfig"
391
392config IO_WQ
393	bool
394
395endmenu
396