OpenCloudOS-Kernel/fs/verity/Makefile

# SPDX-License-Identifier: GPL-2.0

obj-$(CONFIG_FS_VERITY) += hash_algs.o \
			   init.o \
			   open.o \
			   verify.o
fs-verity: add Kconfig and the helper functions for hashing Add the beginnings of the fs/verity/ support layer, including the Kconfig option and various helper functions for hashing. To start, only SHA-256 is supported, but other hash algorithms can easily be added. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> 2019-07-23 00:26:21 +08:00			`# SPDX-License-Identifier: GPL-2.0`

			`obj-$(CONFIG_FS_VERITY) += hash_algs.o \`
fs-verity: add the hook for file ->open() Add the fsverity_file_open() function, which prepares an fs-verity file to be read from. If not already done, it loads the fs-verity descriptor from the filesystem and sets up an fsverity_info structure for the inode which describes the Merkle tree and contains the file measurement. It also denies all attempts to open verity files for writing. This commit also begins the include/linux/fsverity.h header, which declares the interface between fs/verity/ and filesystems. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> 2019-07-23 00:26:22 +08:00			`init.o \`
fs-verity: add data verification hooks for ->readpages() Add functions that verify data pages that have been read from a fs-verity file, against that file's Merkle tree. These will be called from filesystems' ->readpage() and ->readpages() methods. Since data verification can block, a workqueue is provided for these methods to enqueue verification work from their bio completion callback. See the "Verifying data" section of Documentation/filesystems/fsverity.rst for more information. Reviewed-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> 2019-07-23 00:26:22 +08:00			`open.o \`
			`verify.o`