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>

2 files changed, 41 insertions, 13 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
diff --git a/crypto/Makefile b/crypto/Makefile
index 5862b807334e..cd4a4ed078ff 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -9,24 +9,24 @@ obj-$(CONFIG_CRYPTO_FIPS) += fips.o
 
 crypto_algapi-$(CONFIG_PROC_FS) += proc.o
 crypto_algapi-objs := algapi.o scatterwalk.o $(crypto_algapi-y)
-obj-$(CONFIG_CRYPTO_ALGAPI) += crypto_algapi.o
+obj-$(CONFIG_CRYPTO_ALGAPI2) += crypto_algapi.o
 
-obj-$(CONFIG_CRYPTO_AEAD) += aead.o
+obj-$(CONFIG_CRYPTO_AEAD2) += aead.o
 
 crypto_blkcipher-objs := ablkcipher.o
 crypto_blkcipher-objs += blkcipher.o
-obj-$(CONFIG_CRYPTO_BLKCIPHER) += crypto_blkcipher.o
-obj-$(CONFIG_CRYPTO_BLKCIPHER) += chainiv.o
-obj-$(CONFIG_CRYPTO_BLKCIPHER) += eseqiv.o
+obj-$(CONFIG_CRYPTO_BLKCIPHER2) += crypto_blkcipher.o
+obj-$(CONFIG_CRYPTO_BLKCIPHER2) += chainiv.o
+obj-$(CONFIG_CRYPTO_BLKCIPHER2) += eseqiv.o
 obj-$(CONFIG_CRYPTO_SEQIV) += seqiv.o
 
 crypto_hash-objs := hash.o
 crypto_hash-objs += ahash.o
-obj-$(CONFIG_CRYPTO_HASH) += crypto_hash.o
+obj-$(CONFIG_CRYPTO_HASH2) += crypto_hash.o
 
 cryptomgr-objs := algboss.o testmgr.o
 
-obj-$(CONFIG_CRYPTO_MANAGER) += cryptomgr.o
+obj-$(CONFIG_CRYPTO_MANAGER2) += cryptomgr.o
 obj-$(CONFIG_CRYPTO_HMAC) += hmac.o
 obj-$(CONFIG_CRYPTO_XCBC) += xcbc.o
 obj-$(CONFIG_CRYPTO_NULL) += crypto_null.o
@@ -73,8 +73,8 @@ obj-$(CONFIG_CRYPTO_MICHAEL_MIC) += michael_mic.o
 obj-$(CONFIG_CRYPTO_CRC32C) += crc32c.o
 obj-$(CONFIG_CRYPTO_AUTHENC) += authenc.o
 obj-$(CONFIG_CRYPTO_LZO) += lzo.o
-obj-$(CONFIG_CRYPTO_RNG) += rng.o
-obj-$(CONFIG_CRYPTO_RNG) += krng.o
+obj-$(CONFIG_CRYPTO_RNG2) += rng.o
+obj-$(CONFIG_CRYPTO_RNG2) += krng.o
 obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
 obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o