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author | Herbert Xu <herbert@gondor.apana.org.au> | 2008-09-13 18:19:03 -0700 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-12-25 11:01:23 +1100 |
commit | 4a7794860ba2b56693b1d89fd485fd08cdc763e3 (patch) | |
tree | d97f46fe980ac79e226b429a61c5328fae9bf882 /crypto | |
parent | 2566578a6feb9d9e39da41326afe8ed6022db3c5 (diff) | |
download | lwn-4a7794860ba2b56693b1d89fd485fd08cdc763e3.tar.gz lwn-4a7794860ba2b56693b1d89fd485fd08cdc763e3.zip |
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 'crypto')
-rw-r--r-- | crypto/api.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/crypto/api.c b/crypto/api.c index 0444d242e985..cbaaf346ad13 100644 --- a/crypto/api.c +++ b/crypto/api.c @@ -300,8 +300,8 @@ static void crypto_exit_ops(struct crypto_tfm *tfm) const struct crypto_type *type = tfm->__crt_alg->cra_type; if (type) { - if (type->exit) - type->exit(tfm); + if (tfm->exit) + tfm->exit(tfm); return; } @@ -379,17 +379,16 @@ struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 type, if (err) goto out_free_tfm; - if (alg->cra_init && (err = alg->cra_init(tfm))) { - if (err == -EAGAIN) - crypto_shoot_alg(alg); + if (!tfm->exit && alg->cra_init && (err = alg->cra_init(tfm))) goto cra_init_failed; - } goto out; cra_init_failed: crypto_exit_ops(tfm); out_free_tfm: + if (err == -EAGAIN) + crypto_shoot_alg(alg); kfree(tfm); out_err: tfm = ERR_PTR(err); @@ -469,7 +468,7 @@ void crypto_free_tfm(struct crypto_tfm *tfm) alg = tfm->__crt_alg; size = sizeof(*tfm) + alg->cra_ctxsize; - if (alg->cra_exit) + if (!tfm->exit && alg->cra_exit) alg->cra_exit(tfm); crypto_exit_ops(tfm); crypto_mod_put(alg); |