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47393901fb
This patch adds the renamed functions moved from the f2fs crypto files. [Backporting to 3.10] - Removed d_is_negative() in fscrypt_d_revalidate(). 1. definitions for per-file encryption used by ext4 and f2fs. 2. crypto.c for encrypt/decrypt functions a. IO preparation: - fscrypt_get_ctx / fscrypt_release_ctx b. before IOs: - fscrypt_encrypt_page - fscrypt_decrypt_page - fscrypt_zeroout_range c. after IOs: - fscrypt_decrypt_bio_pages - fscrypt_pullback_bio_page - fscrypt_restore_control_page 3. policy.c supporting context management. a. For ioctls: - fscrypt_process_policy - fscrypt_get_policy b. For context permission - fscrypt_has_permitted_context - fscrypt_inherit_context 4. keyinfo.c to handle permissions - fscrypt_get_encryption_info - fscrypt_free_encryption_info 5. fname.c to support filename encryption a. general wrapper functions - fscrypt_fname_disk_to_usr - fscrypt_fname_usr_to_disk - fscrypt_setup_filename - fscrypt_free_filename b. specific filename handling functions - fscrypt_fname_alloc_buffer - fscrypt_fname_free_buffer 6. Makefile and Kconfig Cc: Al Viro <viro@ftp.linux.org.uk> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Conflicts: fs/f2fs/f2fs.h fs/f2fs/inode.c fs/f2fs/super.c include/linux/fs.h Change-Id: I162f3562aed66e7e377ec38714fae96c651fbdd7
94 lines
3 KiB
Text
94 lines
3 KiB
Text
config F2FS_FS
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tristate "F2FS filesystem support"
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depends on BLOCK
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help
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F2FS is based on Log-structured File System (LFS), which supports
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versatile "flash-friendly" features. The design has been focused on
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addressing the fundamental issues in LFS, which are snowball effect
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of wandering tree and high cleaning overhead.
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Since flash-based storages show different characteristics according to
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the internal geometry or flash memory management schemes aka FTL, F2FS
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and tools support various parameters not only for configuring on-disk
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layout, but also for selecting allocation and cleaning algorithms.
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If unsure, say N.
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config F2FS_STAT_FS
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bool "F2FS Status Information"
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depends on F2FS_FS && DEBUG_FS
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default y
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help
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/sys/kernel/debug/f2fs/ contains information about all the partitions
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mounted as f2fs. Each file shows the whole f2fs information.
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/sys/kernel/debug/f2fs/status includes:
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- major filesystem information managed by f2fs currently
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- average SIT information about whole segments
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- current memory footprint consumed by f2fs.
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config F2FS_FS_XATTR
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bool "F2FS extended attributes"
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depends on F2FS_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 F2FS_FS_POSIX_ACL
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bool "F2FS Access Control Lists"
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depends on F2FS_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 F2FS_FS_SECURITY
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bool "F2FS Security Labels"
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depends on F2FS_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 f2fs 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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config F2FS_CHECK_FS
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bool "F2FS consistency checking feature"
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depends on F2FS_FS
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help
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Enables BUG_ONs which check the filesystem consistency in runtime.
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If you want to improve the performance, say N.
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config F2FS_FS_ENCRYPTION
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bool "F2FS Encryption"
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depends on F2FS_FS
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depends on F2FS_FS_XATTR
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select FS_ENCRYPTION
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help
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Enable encryption of f2fs files and directories. This
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feature is similar to ecryptfs, but it is more memory
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efficient since it avoids caching the encrypted and
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decrypted pages in the page cache.
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config F2FS_IO_TRACE
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bool "F2FS IO tracer"
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depends on F2FS_FS
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depends on FUNCTION_TRACER
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help
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F2FS IO trace is based on a function trace, which gathers process
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information and block IO patterns in the filesystem level.
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If unsure, say N.
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