xref: /openbmc/linux/fs/Kconfig (revision 8e7a49e0) 
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
253#
254# Select this config option from the architecture Kconfig, if it is preferred
255# to enable the feature of HugeTLB Vmemmap Optimization (HVO).
256#
257config ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
258	bool
259
260config HUGETLB_PAGE_OPTIMIZE_VMEMMAP
261	def_bool HUGETLB_PAGE
262	depends on ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
263	depends on SPARSEMEM_VMEMMAP
264
265config HUGETLB_PAGE_OPTIMIZE_VMEMMAP_DEFAULT_ON
266	bool "HugeTLB Vmemmap Optimization (HVO) defaults to on"
267	default n
268	depends on HUGETLB_PAGE_OPTIMIZE_VMEMMAP
269	help
270	  The HugeTLB VmemmapvOptimization (HVO) defaults to off. Say Y here to
271	  enable HVO by default. It can be disabled via hugetlb_free_vmemmap=off
272	  (boot command line) or hugetlb_optimize_vmemmap (sysctl).
273
274config MEMFD_CREATE
275	def_bool TMPFS || HUGETLBFS
276
277config ARCH_HAS_GIGANTIC_PAGE
278	bool
279
280source "fs/configfs/Kconfig"
281source "fs/efivarfs/Kconfig"
282
283endmenu
284
285menuconfig MISC_FILESYSTEMS
286	bool "Miscellaneous filesystems"
287	default y
288	help
289	  Say Y here to get to see options for various miscellaneous
290	  filesystems, such as filesystems that came from other
291	  operating systems.
292
293	  This option alone does not add any kernel code.
294
295	  If you say N, all options in this submenu will be skipped and
296	  disabled; if unsure, say Y here.
297
298if MISC_FILESYSTEMS
299
300source "fs/orangefs/Kconfig"
301source "fs/adfs/Kconfig"
302source "fs/affs/Kconfig"
303source "fs/ecryptfs/Kconfig"
304source "fs/hfs/Kconfig"
305source "fs/hfsplus/Kconfig"
306source "fs/befs/Kconfig"
307source "fs/bfs/Kconfig"
308source "fs/efs/Kconfig"
309source "fs/jffs2/Kconfig"
310# UBIFS File system configuration
311source "fs/ubifs/Kconfig"
312source "fs/cramfs/Kconfig"
313source "fs/squashfs/Kconfig"
314source "fs/freevxfs/Kconfig"
315source "fs/minix/Kconfig"
316source "fs/omfs/Kconfig"
317source "fs/hpfs/Kconfig"
318source "fs/qnx4/Kconfig"
319source "fs/qnx6/Kconfig"
320source "fs/romfs/Kconfig"
321source "fs/pstore/Kconfig"
322source "fs/sysv/Kconfig"
323source "fs/ufs/Kconfig"
324source "fs/erofs/Kconfig"
325source "fs/vboxsf/Kconfig"
326
327endif # MISC_FILESYSTEMS
328
329menuconfig NETWORK_FILESYSTEMS
330	bool "Network File Systems"
331	default y
332	depends on NET
333	help
334	  Say Y here to get to see options for network filesystems and
335	  filesystem-related networking code, such as NFS daemon and
336	  RPCSEC security modules.
337
338	  This option alone does not add any kernel code.
339
340	  If you say N, all options in this submenu will be skipped and
341	  disabled; if unsure, say Y here.
342
343if NETWORK_FILESYSTEMS
344
345source "fs/nfs/Kconfig"
346source "fs/nfsd/Kconfig"
347
348config GRACE_PERIOD
349	tristate
350
351config LOCKD
352	tristate
353	depends on FILE_LOCKING
354	select GRACE_PERIOD
355
356config LOCKD_V4
357	bool
358	depends on NFSD || NFS_V3
359	depends on FILE_LOCKING
360	default y
361
362config NFS_ACL_SUPPORT
363	tristate
364	select FS_POSIX_ACL
365
366config NFS_COMMON
367	bool
368	depends on NFSD || NFS_FS || LOCKD
369	default y
370
371config NFS_V4_2_SSC_HELPER
372	bool
373	default y if NFS_V4_2
374
375source "net/sunrpc/Kconfig"
376source "fs/ceph/Kconfig"
377
378source "fs/cifs/Kconfig"
379source "fs/ksmbd/Kconfig"
380
381config SMBFS_COMMON
382	tristate
383	default y if CIFS=y || SMB_SERVER=y
384	default m if CIFS=m || SMB_SERVER=m
385
386source "fs/coda/Kconfig"
387source "fs/afs/Kconfig"
388source "fs/9p/Kconfig"
389
390endif # NETWORK_FILESYSTEMS
391
392source "fs/nls/Kconfig"
393source "fs/dlm/Kconfig"
394source "fs/unicode/Kconfig"
395
396config IO_WQ
397	bool
398
399endmenu
400