2018-07-26 12:21:51 +00:00
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# SPDX-License-Identifier: GPL-2.0
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config EROFS_FS
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tristate "EROFS filesystem support"
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depends on BLOCK
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help
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EROFS(Enhanced Read-Only File System) is a lightweight
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read-only file system with modern designs (eg. page-sized
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blocks, inline xattrs/data, etc.) for scenarios which need
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high-performance read-only requirements, eg. firmwares in
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mobile phone or LIVECDs.
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It also provides VLE compression support, focusing on
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random read improvements, keeping relatively lower
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compression ratios, which is useful for high-performance
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devices with limited memory and ROM space.
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If unsure, say N.
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config EROFS_FS_DEBUG
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bool "EROFS debugging feature"
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depends on EROFS_FS
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help
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Print EROFS debugging messages and enable more BUG_ONs
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which check the filesystem consistency aggressively.
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For daily use, say N.
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2018-07-26 12:21:52 +00:00
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config EROFS_FS_XATTR
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bool "EROFS extended attributes"
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depends on EROFS_FS
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default y
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help
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Extended attributes are name:value pairs associated with inodes by
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the kernel or by users (see the attr(5) manual page, or visit
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<http://acl.bestbits.at/> for details).
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If unsure, say N.
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config EROFS_FS_POSIX_ACL
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bool "EROFS Access Control Lists"
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depends on EROFS_FS_XATTR
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select FS_POSIX_ACL
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default y
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help
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Posix Access Control Lists (ACLs) support permissions for users and
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groups beyond the owner/group/world scheme.
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To learn more about Access Control Lists, visit the POSIX ACLs for
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Linux website <http://acl.bestbits.at/>.
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If you don't know what Access Control Lists are, say N.
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config EROFS_FS_SECURITY
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bool "EROFS Security Labels"
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depends on EROFS_FS_XATTR
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help
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Security labels provide an access control facility to support Linux
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Security Models (LSMs) accepted by AppArmor, SELinux, Smack and TOMOYO
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Linux. This option enables an extended attribute handler for file
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security labels in the erofs filesystem, so that it requires enabling
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the extended attribute support in advance.
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If you are not using a security module, say N.
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2018-07-26 12:21:51 +00:00
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config EROFS_FS_USE_VM_MAP_RAM
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bool "EROFS VM_MAP_RAM Support"
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depends on EROFS_FS
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help
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use vm_map_ram/vm_unmap_ram instead of vmap/vunmap.
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If you don't know what these are, say N.
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2018-07-26 12:21:54 +00:00
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config EROFS_FAULT_INJECTION
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bool "EROFS fault injection facility"
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depends on EROFS_FS
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help
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Test EROFS to inject faults such as ENOMEM, EIO, and so on.
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If unsure, say N.
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