fs-verity: add data verification hooks for ->readpages()

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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>

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This commit is contained in:

Eric Biggers 2019-07-22 09:26:22 -07:00

parent c1d9b584e2

commit 8a1d0f9cac

6 changed files with 352 additions and 1 deletions

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3

fs/verity/Makefile

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5

fs/verity/fsverity_private.h

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8

fs/verity/init.c

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6

fs/verity/open.c

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275

fs/verity/verify.c

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56

include/linux/fsverity.h

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