chore: opts create helper and base bdev helper

Signed-off-by: Diwakar Sharma <diwakar.sharma@datacore.com>

Author: dsharma-dc

module/bdev/crypto/vbdev_crypto.c

@@ -600,6 +600,34 @@ vbdev_crypto_delete_name(struct bdev_names *name)
 	free(name);
 }
 
+/* For the named crypto vbdev and the named base bdev, create the crypto opts */
+struct vbdev_crypto_opts *
+create_crypto_opts_by_name(char *name, char *base_bdev_name, struct spdk_accel_crypto_key *key,
+			   bool key_owner)
+{
+	struct vbdev_crypto_opts *opts = calloc(1, sizeof(*opts));
+
+	if (!opts) {
+		return NULL;
+	}
+
+	opts->bdev_name = strdup(base_bdev_name);
+	if (!opts->bdev_name) {
+		free_crypto_opts(opts);
+		return NULL;
+	}
+	opts->vbdev_name = strdup(name);
+	if (!opts->vbdev_name) {
+		free_crypto_opts(opts);
+		return NULL;
+	}
+
+	opts->key = key;
+	opts->key_owner = key_owner;
+
+	return opts;
+}
+
 /* RPC entry point for crypto creation. */
 int
 create_crypto_disk(struct vbdev_crypto_opts *opts)
@@ -929,6 +957,21 @@ delete_crypto_disk(const char *bdev_name, spdk_delete_crypto_complete cb_fn,
 	}
 }
 
+/* Get the base bdev corresponding to the given vbdev name. */
+struct spdk_bdev *
+vbdev_crypto_disk_get_base_bdev(const char *vbdev_name)
+{
+	struct vbdev_crypto *crypto_vbdev;
+
+	TAILQ_FOREACH(crypto_vbdev, &g_vbdev_crypto, link) {
+		if (strcmp(crypto_vbdev->crypto_bdev.name, vbdev_name) == 0) {
+			return crypto_vbdev->base_bdev;
+		}
+	}
+
+	return NULL;
+}
+
 /* Because we specified this function in our crypto bdev function table when we
  * registered our crypto bdev, we'll get this call anytime a new bdev shows up.
  * Here we need to decide if we care about it and if so what to do. We

module/bdev/crypto/vbdev_crypto.h

@@ -47,11 +47,33 @@ int create_crypto_disk(struct vbdev_crypto_opts *opts);
 void delete_crypto_disk(const char *bdev_name, spdk_delete_crypto_complete cb_fn,
 			void *cb_arg);
 
+/**
+ * Create crypto opts for the given crypto vbdev name and base bdev name.
+ *
+ * \param name Name of crypto vbdev
+ * \param base_bdev_name Name of base bdev for crypto vbdev
+ * \param key crypto key for the vbdev
+ * \param key_owner Is key created by application/RPC.
+ * \return Handle to created vbdev_crypto_opts or NULL if failed ot create.
+ */
+struct vbdev_crypto_opts *
+create_crypto_opts_by_name(char *name, char *base_bdev_name, struct spdk_accel_crypto_key *key,
+			   bool key_owner);
+
 /**
  * Release crypto opts created with create_crypto_opts()
  *
  * \param opts Crypto opts to release
  */
 void free_crypto_opts(struct vbdev_crypto_opts *opts);
 
+/**
+ * Given a vbdev crypto name, get the handle for base bdev of the vbdev.
+ *
+ * \param vbdev_name Name of crypto vbdev.
+ * \return Handle to base bdev or NULL if not found.
+ */
+struct spdk_bdev *
+vbdev_crypto_disk_get_base_bdev(const char *vbdev_name);
+
 #endif /* SPDK_VBDEV_CRYPTO_H */