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authorEric Biggers <ebiggers@google.com>2019-07-22 19:26:22 +0300
committerEric Biggers <ebiggers@google.com>2019-07-29 02:59:16 +0300
commit8a1d0f9cacc997bedc017056a94f35dc823394ed (patch)
tree90d55ad08622ed954361629d906d11469919abae /fs/verity/open.c
parentc1d9b584e2cf3f0562d8fcf34574c044d17853a1 (diff)
downloadlinux-8a1d0f9cacc997bedc017056a94f35dc823394ed.tar.xz
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>
Diffstat (limited to 'fs/verity/open.c')
-rw-r--r--fs/verity/open.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/verity/open.c b/fs/verity/open.c
index 2cb2fe8082bf..3636a1ed8e2c 100644
--- a/fs/verity/open.c
+++ b/fs/verity/open.c
@@ -337,3 +337,9 @@ int __init fsverity_init_info_cache(void)
return -ENOMEM;
return 0;
}
+
+void __init fsverity_exit_info_cache(void)
+{
+ kmem_cache_destroy(fsverity_info_cachep);
+ fsverity_info_cachep = NULL;
+}