path: root/include/linux/crypto.h
diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2008-09-14 01:19:03 (GMT)
committerHerbert Xu <herbert@gondor.apana.org.au>2008-12-25 00:01:23 (GMT)
commit4a7794860ba2b56693b1d89fd485fd08cdc763e3 (patch)
treed97f46fe980ac79e226b429a61c5328fae9bf882 /include/linux/crypto.h
parent2566578a6feb9d9e39da41326afe8ed6022db3c5 (diff)
crypto: api - Move type exit function into crypto_tfm
The type exit function needs to undo any allocations done by the type init function. However, the type init function may differ depending on the upper-level type of the transform (e.g., a crypto_blkcipher instantiated as a crypto_ablkcipher). So we need to move the exit function out of the lower-level structure and into crypto_tfm itself. As it stands this is a no-op since nobody uses exit functions at all. However, all cases where a lower-level type is instantiated as a different upper-level type (such as blkcipher as ablkcipher) will be converted such that they allocate the underlying transform and use that instead of casting (e.g., crypto_ablkcipher casted into crypto_blkcipher). That will need to use a different exit function depending on the upper-level type. This patch also allows the type init/exit functions to call (or not) cra_init/cra_exit instead of always calling them from the top level. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/linux/crypto.h')
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 3d2317e..ea52cd9 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -480,6 +480,8 @@ struct crypto_tfm {
struct compress_tfm compress;
struct rng_tfm rng;
} crt_u;
+ void (*exit)(struct crypto_tfm *tfm);
struct crypto_alg *__crt_alg;

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