xref: /openbmc/linux/fs/Kconfig (revision 9a32dd32) 
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
21# old blockdev_direct_IO implementation.  Use iomap for new code instead
22config LEGACY_DIRECT_IO
23	bool
24
25if BLOCK
26
27source "fs/ext2/Kconfig"
28source "fs/ext4/Kconfig"
29source "fs/jbd2/Kconfig"
30
31config FS_MBCACHE
32# Meta block cache for Extended Attributes (ext2/ext3/ext4)
33	tristate
34	default y if EXT2_FS=y && EXT2_FS_XATTR
35	default y if EXT4_FS=y
36	default m if EXT2_FS_XATTR || EXT4_FS
37
38source "fs/reiserfs/Kconfig"
39source "fs/jfs/Kconfig"
40
41source "fs/xfs/Kconfig"
42source "fs/gfs2/Kconfig"
43source "fs/ocfs2/Kconfig"
44source "fs/btrfs/Kconfig"
45source "fs/nilfs2/Kconfig"
46source "fs/f2fs/Kconfig"
47source "fs/zonefs/Kconfig"
48
49endif # BLOCK
50
51config FS_DAX
52	bool "File system based Direct Access (DAX) support"
53	depends on MMU
54	depends on !(ARM || MIPS || SPARC)
55	depends on ZONE_DEVICE || FS_DAX_LIMITED
56	select FS_IOMAP
57	select DAX
58	help
59	  Direct Access (DAX) can be used on memory-backed block devices.
60	  If the block device supports DAX and the filesystem supports DAX,
61	  then you can avoid using the pagecache to buffer I/Os.  Turning
62	  on this option will compile in support for DAX.
63
64	  For a DAX device to support file system access it needs to have
65	  struct pages.  For the nfit based NVDIMMs this can be enabled
66	  using the ndctl utility:
67
68		# ndctl create-namespace --force --reconfig=namespace0.0 \
69			--mode=fsdax --map=mem
70
71	  See the 'create-namespace' man page for details on the overhead of
72	  --map=mem:
73	  https://docs.pmem.io/ndctl-user-guide/ndctl-man-pages/ndctl-create-namespace
74
75          For ndctl to work CONFIG_DEV_DAX needs to be enabled as well. For most
76	  file systems DAX support needs to be manually enabled globally or
77	  per-inode using a mount option as well.  See the file documentation in
78	  Documentation/filesystems/dax.rst for details.
79
80	  If you do not have a block device that is capable of using this,
81	  or if unsure, say N.  Saying Y will increase the size of the kernel
82	  by about 5kB.
83
84config FS_DAX_PMD
85	bool
86	default FS_DAX
87	depends on FS_DAX
88	depends on ZONE_DEVICE
89	depends on TRANSPARENT_HUGEPAGE
90
91# Selected by DAX drivers that do not expect filesystem DAX to support
92# get_user_pages() of DAX mappings. I.e. "limited" indicates no support
93# for fork() of processes with MAP_SHARED mappings or support for
94# direct-I/O to a DAX mapping.
95config FS_DAX_LIMITED
96	bool
97
98# Posix ACL utility routines
99#
100# Note: Posix ACLs can be implemented without these helpers.  Never use
101# this symbol for ifdefs in core code.
102#
103config FS_POSIX_ACL
104	def_bool n
105
106config EXPORTFS
107	tristate
108
109config EXPORTFS_BLOCK_OPS
110	bool "Enable filesystem export operations for block IO"
111	help
112	  This option enables the export operations for a filesystem to support
113	  external block IO.
114
115config FILE_LOCKING
116	bool "Enable POSIX file locking API" if EXPERT
117	default y
118	help
119	  This option enables standard file locking support, required
120          for filesystems like NFS and for the flock() system
121          call. Disabling this option saves about 11k.
122
123source "fs/crypto/Kconfig"
124
125source "fs/verity/Kconfig"
126
127source "fs/notify/Kconfig"
128
129source "fs/quota/Kconfig"
130
131source "fs/autofs/Kconfig"
132source "fs/fuse/Kconfig"
133source "fs/overlayfs/Kconfig"
134
135menu "Caches"
136
137source "fs/netfs/Kconfig"
138source "fs/fscache/Kconfig"
139source "fs/cachefiles/Kconfig"
140
141endmenu
142
143if BLOCK
144menu "CD-ROM/DVD Filesystems"
145
146source "fs/isofs/Kconfig"
147source "fs/udf/Kconfig"
148
149endmenu
150endif # BLOCK
151
152if BLOCK
153menu "DOS/FAT/EXFAT/NT Filesystems"
154
155source "fs/fat/Kconfig"
156source "fs/exfat/Kconfig"
157source "fs/ntfs/Kconfig"
158source "fs/ntfs3/Kconfig"
159
160endmenu
161endif # BLOCK
162
163menu "Pseudo filesystems"
164
165source "fs/proc/Kconfig"
166source "fs/kernfs/Kconfig"
167source "fs/sysfs/Kconfig"
168
169config TMPFS
170	bool "Tmpfs virtual memory file system support (former shm fs)"
171	depends on SHMEM
172	help
173	  Tmpfs is a file system which keeps all files in virtual memory.
174
175	  Everything in tmpfs is temporary in the sense that no files will be
176	  created on your hard drive. The files live in memory and swap
177	  space. If you unmount a tmpfs instance, everything stored therein is
178	  lost.
179
180	  See <file:Documentation/filesystems/tmpfs.rst> for details.
181
182config TMPFS_POSIX_ACL
183	bool "Tmpfs POSIX Access Control Lists"
184	depends on TMPFS
185	select TMPFS_XATTR
186	select FS_POSIX_ACL
187	help
188	  POSIX Access Control Lists (ACLs) support additional access rights
189	  for users and groups beyond the standard owner/group/world scheme,
190	  and this option selects support for ACLs specifically for tmpfs
191	  filesystems.
192
193	  If you've selected TMPFS, it's possible that you'll also need
194	  this option as there are a number of Linux distros that require
195	  POSIX ACL support under /dev for certain features to work properly.
196	  For example, some distros need this feature for ALSA-related /dev
197	  files for sound to work properly.  In short, if you're not sure,
198	  say Y.
199
200config TMPFS_XATTR
201	bool "Tmpfs extended attributes"
202	depends on TMPFS
203	default n
204	help
205	  Extended attributes are name:value pairs associated with inodes by
206	  the kernel or by users (see the attr(5) manual page for details).
207
208	  Currently this enables support for the trusted.* and
209	  security.* namespaces.
210
211	  You need this for POSIX ACL support on tmpfs.
212
213	  If unsure, say N.
214
215config TMPFS_INODE64
216	bool "Use 64-bit ino_t by default in tmpfs"
217	depends on TMPFS && 64BIT
218	default n
219	help
220	  tmpfs has historically used only inode numbers as wide as an unsigned
221	  int. In some cases this can cause wraparound, potentially resulting
222	  in multiple files with the same inode number on a single device. This
223	  option makes tmpfs use the full width of ino_t by default, without
224	  needing to specify the inode64 option when mounting.
225
226	  But if a long-lived tmpfs is to be accessed by 32-bit applications so
227	  ancient that opening a file larger than 2GiB fails with EINVAL, then
228	  the INODE64 config option and inode64 mount option risk operations
229	  failing with EOVERFLOW once 33-bit inode numbers are reached.
230
231	  To override this configured default, use the inode32 or inode64
232	  option when mounting.
233
234	  If unsure, say N.
235
236config ARCH_SUPPORTS_HUGETLBFS
237	def_bool n
238
239config HUGETLBFS
240	bool "HugeTLB file system support"
241	depends on X86 || IA64 || SPARC64 || ARCH_SUPPORTS_HUGETLBFS || BROKEN
242	depends on (SYSFS || SYSCTL)
243	help
244	  hugetlbfs is a filesystem backing for HugeTLB pages, based on
245	  ramfs. For architectures that support it, say Y here and read
246	  <file:Documentation/admin-guide/mm/hugetlbpage.rst> for details.
247
248	  If unsure, say N.
249
250config HUGETLB_PAGE
251	def_bool HUGETLBFS
252
253config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
254	def_bool HUGETLB_PAGE
255	depends on ARCH_WANT_OPTIMIZE_VMEMMAP
256	depends on SPARSEMEM_VMEMMAP
257
258config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
259	bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
260	default n
261	depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
262	help
263	  The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
264	  enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
265	  (boot command line) or hugetlb_optimize_vmemmap (sysctl).
266
267config MEMFD_CREATE
268	def_bool TMPFS || HUGETLBFS
269
270config ARCH_HAS_GIGANTIC_PAGE
271	bool
272
273source "fs/configfs/Kconfig"
274source "fs/efivarfs/Kconfig"
275
276endmenu
277
278menuconfig MISC_FILESYSTEMS
279	bool "Miscellaneous filesystems"
280	default y
281	help
282	  Say Y here to get to see options for various miscellaneous
283	  filesystems, such as filesystems that came from other
284	  operating systems.
285
286	  This option alone does not add any kernel code.
287
288	  If you say N, all options in this submenu will be skipped and
289	  disabled; if unsure, say Y here.
290
291if MISC_FILESYSTEMS
292
293source "fs/orangefs/Kconfig"
294source "fs/adfs/Kconfig"
295source "fs/affs/Kconfig"
296source "fs/ecryptfs/Kconfig"
297source "fs/hfs/Kconfig"
298source "fs/hfsplus/Kconfig"
299source "fs/befs/Kconfig"
300source "fs/bfs/Kconfig"
301source "fs/efs/Kconfig"
302source "fs/jffs2/Kconfig"
303# UBIFS File system configuration
304source "fs/ubifs/Kconfig"
305source "fs/cramfs/Kconfig"
306source "fs/squashfs/Kconfig"
307source "fs/freevxfs/Kconfig"
308source "fs/minix/Kconfig"
309source "fs/omfs/Kconfig"
310source "fs/hpfs/Kconfig"
311source "fs/qnx4/Kconfig"
312source "fs/qnx6/Kconfig"
313source "fs/romfs/Kconfig"
314source "fs/pstore/Kconfig"
315source "fs/sysv/Kconfig"
316source "fs/ufs/Kconfig"
317source "fs/erofs/Kconfig"
318source "fs/vboxsf/Kconfig"
319
320endif # MISC_FILESYSTEMS
321
322menuconfig NETWORK_FILESYSTEMS
323	bool "Network File Systems"
324	default y
325	depends on NET
326	help
327	  Say Y here to get to see options for network filesystems and
328	  filesystem-related networking code, such as NFS daemon and
329	  RPCSEC security modules.
330
331	  This option alone does not add any kernel code.
332
333	  If you say N, all options in this submenu will be skipped and
334	  disabled; if unsure, say Y here.
335
336if NETWORK_FILESYSTEMS
337
338source "fs/nfs/Kconfig"
339source "fs/nfsd/Kconfig"
340
341config GRACE_PERIOD
342	tristate
343
344config LOCKD
345	tristate
346	depends on FILE_LOCKING
347	select GRACE_PERIOD
348
349config LOCKD_V4
350	bool
351	depends on NFSD || NFS_V3
352	depends on FILE_LOCKING
353	default y
354
355config NFS_ACL_SUPPORT
356	tristate
357	select FS_POSIX_ACL
358
359config NFS_COMMON
360	bool
361	depends on NFSD || NFS_FS || LOCKD
362	default y
363
364config NFS_V4_2_SSC_HELPER
365	bool
366	default y if NFS_V4_2
367
368source "net/sunrpc/Kconfig"
369source "fs/ceph/Kconfig"
370
371source "fs/cifs/Kconfig"
372source "fs/ksmbd/Kconfig"
373
374config SMBFS_COMMON
375	tristate
376	default y if CIFS=y || SMB_SERVER=y
377	default m if CIFS=m || SMB_SERVER=m
378
379source "fs/coda/Kconfig"
380source "fs/afs/Kconfig"
381source "fs/9p/Kconfig"
382
383endif # NETWORK_FILESYSTEMS
384
385source "fs/nls/Kconfig"
386source "fs/dlm/Kconfig"
387source "fs/unicode/Kconfig"
388
389config IO_WQ
390	bool
391
392endmenu
393