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fs-verity: add Kconfig and the helper functions for hashing

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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>
This commit is contained in:
Eric Biggers
2019-07-22 09:26:21 -07:00
parent fe9918d3b2
commit 671e67b47e
7 changed files with 449 additions and 0 deletions
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fs/Makefile
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@@ -34,6 +34,7 @@ obj-$(CONFIG_AIO) += aio.o
obj-$(CONFIG_IO_URING) += io_uring.o
obj-$(CONFIG_FS_DAX) += dax.o
obj-$(CONFIG_FS_ENCRYPTION) += crypto/
obj-$(CONFIG_FS_VERITY) += verity/
obj-$(CONFIG_FILE_LOCKING) += locks.o
obj-$(CONFIG_COMPAT) += compat.o compat_ioctl.o
obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o