nvme: rework NVME_AUTH Kconfig selection

Having a single Kconfig symbol NVME_AUTH conflates the selection
of the authentication functions from nvme/common and nvme/host,
causing kbuild robot to complain when building the nvme target
only. So introduce a Kconfig symbol NVME_HOST_AUTH for the nvme
host bits and use NVME_AUTH for the common functions only.
And move the CRYPTO selection into nvme/common to make it
easier to read.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310120733.TlPOVeJm-lkp@intel.com/
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>

Author: hreinecke

drivers/nvme/common/Kconfig

@@ -6,3 +6,12 @@ config NVME_COMMON
 config NVME_KEYRING
        bool
        select KEYS
+
+config NVME_AUTH
+	bool
+	select CRYPTO
+	select CRYPTO_HMAC
+	select CRYPTO_SHA256
+	select CRYPTO_SHA512
+	select CRYPTO_DH
+	select CRYPTO_DH_RFC7919_GROUPS

drivers/nvme/host/Kconfig

@@ -107,16 +107,11 @@ config NVME_TCP_TLS
 
 	  If unsure, say N.
 
-config NVME_AUTH
+config NVME_HOST_AUTH
 	bool "NVM Express over Fabrics In-Band Authentication"
 	depends on NVME_CORE
 	select NVME_COMMON
-	select CRYPTO
-	select CRYPTO_HMAC
-	select CRYPTO_SHA256
-	select CRYPTO_SHA512
-	select CRYPTO_DH
-	select CRYPTO_DH_RFC7919_GROUPS
+	select NVME_AUTH
 	help
 	  This provides support for NVMe over Fabrics In-Band Authentication.
 

drivers/nvme/host/Makefile

@@ -17,7 +17,7 @@ nvme-core-$(CONFIG_NVME_MULTIPATH)	+= multipath.o
 nvme-core-$(CONFIG_BLK_DEV_ZONED)	+= zns.o
 nvme-core-$(CONFIG_FAULT_INJECTION_DEBUG_FS)	+= fault_inject.o
 nvme-core-$(CONFIG_NVME_HWMON)		+= hwmon.o
-nvme-core-$(CONFIG_NVME_AUTH)		+= auth.o
+nvme-core-$(CONFIG_NVME_HOST_AUTH)	+= auth.o
 
 nvme-y					+= pci.o
 

drivers/nvme/host/core.c

@@ -421,7 +421,7 @@ void nvme_complete_rq(struct request *req)
 		nvme_failover_req(req);
 		return;
 	case AUTHENTICATE:
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 		queue_work(nvme_wq, &ctrl->dhchap_auth_work);
 		nvme_retry_req(req);
 #else

drivers/nvme/host/nvme.h

@@ -349,7 +349,7 @@ struct nvme_ctrl {
 	struct work_struct ana_work;
 #endif
 
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 	struct work_struct dhchap_auth_work;
 	struct mutex dhchap_auth_mutex;
 	struct nvme_dhchap_queue_context *dhchap_ctxs;
@@ -1049,7 +1049,7 @@ static inline bool nvme_ctrl_sgl_supported(struct nvme_ctrl *ctrl)
 	return ctrl->sgls & ((1 << 0) | (1 << 1));
 }
 
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 int __init nvme_init_auth(void);
 void __exit nvme_exit_auth(void);
 int nvme_auth_init_ctrl(struct nvme_ctrl *ctrl);

drivers/nvme/host/sysfs.c

@@ -409,7 +409,7 @@ static ssize_t dctype_show(struct device *dev,
 }
 static DEVICE_ATTR_RO(dctype);
 
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 static ssize_t nvme_ctrl_dhchap_secret_show(struct device *dev,
 		struct device_attribute *attr, char *buf)
 {
@@ -563,7 +563,7 @@ static struct attribute *nvme_dev_attrs[] = {
 	&dev_attr_kato.attr,
 	&dev_attr_cntrltype.attr,
 	&dev_attr_dctype.attr,
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 	&dev_attr_dhchap_secret.attr,
 	&dev_attr_dhchap_ctrl_secret.attr,
 #endif
@@ -593,7 +593,7 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj,
 		return 0;
 	if (a == &dev_attr_fast_io_fail_tmo.attr && !ctrl->opts)
 		return 0;
-#ifdef CONFIG_NVME_AUTH
+#ifdef CONFIG_NVME_HOST_AUTH
 	if (a == &dev_attr_dhchap_secret.attr && !ctrl->opts)
 		return 0;
 	if (a == &dev_attr_dhchap_ctrl_secret.attr && !ctrl->opts)

drivers/nvme/target/Kconfig

@@ -103,12 +103,7 @@ config NVME_TARGET_AUTH
 	bool "NVMe over Fabrics In-band Authentication support"
 	depends on NVME_TARGET
 	select NVME_COMMON
-	select CRYPTO
-	select CRYPTO_HMAC
-	select CRYPTO_SHA256
-	select CRYPTO_SHA512
-	select CRYPTO_DH
-	select CRYPTO_DH_RFC7919_GROUPS
+	select NVME_AUTH
 	help
 	  This enables support for NVMe over Fabrics In-band Authentication