1 # SPDX-License-Identifier: GPL-2.0-only
2
3 config EROFS_FS
4 tristate "EROFS filesystem support"
5 depends on BLOCK
6 select FS_IOMAP
7 select LIBCRC32C
8 help
9 EROFS (Enhanced Read-Only File Syste
10 file system with modern designs (e.g
11 xattrs/data, chunk-based deduplicati
12 scenarios which need high-performanc
13 smartphones with Android OS, LiveCDs
14 numerous containers;
15
16 It also provides fixed-sized output
17 improve storage density as well as k
18 ratios and implements in-place decom
19 for compressed data temporarily with
20 quite useful to ensure guaranteed en
21 performance under extremely memory p
22
23 See the documentation at <file:Docum
24 and the web pages at <https://erofs.
25
26 If unsure, say N.
27
28 config EROFS_FS_DEBUG
29 bool "EROFS debugging feature"
30 depends on EROFS_FS
31 help
32 Print debugging messages and enable
33 filesystem consistency and find pote
34 which can be used for Android eng bu
35
36 For daily use, say N.
37
38 config EROFS_FS_XATTR
39 bool "EROFS extended attributes"
40 depends on EROFS_FS
41 select XXHASH
42 default y
43 help
44 Extended attributes are name:value p
45 the kernel or by users (see the attr
46 <http://acl.bestbits.at/> for detail
47
48 If unsure, say N.
49
50 config EROFS_FS_POSIX_ACL
51 bool "EROFS Access Control Lists"
52 depends on EROFS_FS_XATTR
53 select FS_POSIX_ACL
54 default y
55 help
56 Posix Access Control Lists (ACLs) su
57 groups beyond the owner/group/world
58
59 To learn more about Access Control L
60 Linux website <http://acl.bestbits.a
61
62 If you don't know what Access Contro
63
64 config EROFS_FS_SECURITY
65 bool "EROFS Security Labels"
66 depends on EROFS_FS_XATTR
67 default y
68 help
69 Security labels provide an access co
70 Security Models (LSMs) accepted by A
71 Linux. This option enables an extend
72 security labels in the erofs filesys
73 the extended attribute support in ad
74
75 If you are not using a security modu
76
77 config EROFS_FS_ZIP
78 bool "EROFS Data Compression Support"
79 depends on EROFS_FS
80 select LZ4_DECOMPRESS
81 default y
82 help
83 Enable fixed-sized output compressio
84
85 If you don't want to enable compress
86
87 config EROFS_FS_ZIP_LZMA
88 bool "EROFS LZMA compressed data suppo
89 depends on EROFS_FS_ZIP
90 select XZ_DEC
91 select XZ_DEC_MICROLZMA
92 help
93 Saying Y here includes support for r
94 containing LZMA compressed data, spe
95 gives better compression ratios than
96 expense of more CPU overhead.
97
98 If unsure, say N.
99
100 config EROFS_FS_ZIP_DEFLATE
101 bool "EROFS DEFLATE compressed data su
102 depends on EROFS_FS_ZIP
103 select ZLIB_INFLATE
104 help
105 Saying Y here includes support for r
106 containing DEFLATE compressed data.
107 ratios than the default LZ4 format,
108 overhead.
109
110 DEFLATE support is an experimental f
111 file systems will be readable withou
112
113 If unsure, say N.
114
115 config EROFS_FS_ZIP_ZSTD
116 bool "EROFS Zstandard compressed data
117 depends on EROFS_FS_ZIP
118 select ZSTD_DECOMPRESS
119 help
120 Saying Y here includes support for r
121 containing Zstandard compressed data
122 ratios than the default LZ4 format,
123 overhead.
124
125 Zstandard support is an experimental
126 file systems will be readable withou
127
128 If unsure, say N.
129
130 config EROFS_FS_ONDEMAND
131 bool "EROFS fscache-based on-demand re
132 depends on EROFS_FS
133 select NETFS_SUPPORT
134 select FSCACHE
135 select CACHEFILES
136 select CACHEFILES_ONDEMAND
137 help
138 This permits EROFS to use fscache-ba
139 read support.
140
141 If unsure, say N.
142
143 config EROFS_FS_PCPU_KTHREAD
144 bool "EROFS per-cpu decompression kthr
145 depends on EROFS_FS_ZIP
146 help
147 Saying Y here enables per-CPU kthrea
148 async decompression for low latencie
149
150 If unsure, say N.
151
152 config EROFS_FS_PCPU_KTHREAD_HIPRI
153 bool "EROFS high priority per-CPU kthr
154 depends on EROFS_FS_ZIP && EROFS_FS_PC
155 default y
156 help
157 This permits EROFS to configure per-
158 at higher priority.
159
160 If unsure, say N.
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