crypto: api - Disallow cryptomgr as a module if algorithms are built-in

If we have at least one algorithm built-in then it no longer makes
sense to have the testing framework, and hence cryptomgr to be a
module.  It should be either on or off, i.e., built-in or disabled.

This just happens to stop a potential runaway modprobe loop that
seems to trigger on at least one distro.

With fixes from Evgeniy Polyakov.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 32 insertions, 4 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 39dbd8e4dde1..dc20a34ba5ef 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -31,35 +31,63 @@ config CRYPTO_FIPS
 
 config CRYPTO_ALGAPI
         tristate
+        select CRYPTO_ALGAPI2
         help
           This option provides the API for cryptographic algorithms.
 
+config CRYPTO_ALGAPI2
+        tristate
+
 config CRYPTO_AEAD
         tristate
+        select CRYPTO_AEAD2
         select CRYPTO_ALGAPI
 
+config CRYPTO_AEAD2
+        tristate
+        select CRYPTO_ALGAPI2
+
 config CRYPTO_BLKCIPHER
         tristate
+        select CRYPTO_BLKCIPHER2
         select CRYPTO_ALGAPI
-        select CRYPTO_RNG
+
+config CRYPTO_BLKCIPHER2
+        tristate
+        select CRYPTO_ALGAPI2
+        select CRYPTO_RNG2
 
 config CRYPTO_HASH
         tristate
+        select CRYPTO_HASH2
         select CRYPTO_ALGAPI
 
+config CRYPTO_HASH2
+        tristate
+        select CRYPTO_ALGAPI2
+
 config CRYPTO_RNG
         tristate
+        select CRYPTO_RNG2
         select CRYPTO_ALGAPI
 
+config CRYPTO_RNG2
+        tristate
+        select CRYPTO_ALGAPI2
+
 config CRYPTO_MANAGER
         tristate "Cryptographic algorithm manager"
-        select CRYPTO_AEAD
-        select CRYPTO_HASH
-        select CRYPTO_BLKCIPHER
+        select CRYPTO_MANAGER2
         help
           Create default cryptographic template instantiations such as
           cbc(aes).
 
+config CRYPTO_MANAGER2
+        def_tristate CRYPTO_MANAGER || (CRYPTO_MANAGER!=n && CRYPTO_ALGAPI=y)
+        select CRYPTO_AEAD2
+        select CRYPTO_HASH2
+        select CRYPTO_BLKCIPHER2
+
 config CRYPTO_GF128MUL
         tristate "GF(2^128) multiplication functions (EXPERIMENTAL)"
         depends on EXPERIMENTAL