build: compile API functions with missing deps

We should always build all function that are part of the API, even if
some of the libraries they depend on are missing.  In that case, they
can return an error instead.

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I72b450b3a1d62e222bd843e45be547d926414775
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15414
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

include/spdk/blobfs_bdev.h

@@ -47,7 +47,6 @@ void spdk_blobfs_bdev_detect(const char *bdev_name,
 void spdk_blobfs_bdev_create(const char *bdev_name, uint32_t cluster_sz,
 			     spdk_blobfs_bdev_op_complete cb_fn, void *cb_arg);
 
-#ifdef SPDK_CONFIG_FUSE
 /**
  * Mount a blobfs on given device to a host path by FUSE
  *
@@ -61,7 +60,6 @@ void spdk_blobfs_bdev_create(const char *bdev_name, uint32_t cluster_sz,
  */
 void spdk_blobfs_bdev_mount(const char *bdev_name, const char *mountpoint,
 			    spdk_blobfs_bdev_op_complete cb_fn, void *cb_arg);
-#endif
 
 #ifdef __cplusplus
 }

lib/nvme/Makefile

@@ -13,12 +13,12 @@ C_SRCS = nvme_ctrlr_cmd.c nvme_ctrlr.c nvme_fabric.c nvme_ns_cmd.c \
 	nvme_ns.c nvme_pcie_common.c nvme_pcie.c nvme_qpair.c nvme.c \
 	nvme_quirks.c nvme_transport.c nvme_discovery.c \
 	nvme_ctrlr_ocssd_cmd.c nvme_ns_ocssd_cmd.c nvme_tcp.c \
-	nvme_opal.c nvme_io_msg.c nvme_poll_group.c nvme_zns.c
+	nvme_opal.c nvme_io_msg.c nvme_poll_group.c nvme_zns.c \
+	nvme_cuse.c
 ifeq ($(OS),Linux)
 C_SRCS += nvme_vfio_user.c
 endif
 C_SRCS-$(CONFIG_RDMA) += nvme_rdma.c
-C_SRCS-$(CONFIG_NVME_CUSE) += nvme_cuse.c
 
 LIBNAME = nvme
 LOCAL_SYS_LIBS =

lib/nvme/nvme_cuse.c

@@ -2,7 +2,12 @@
  *   Copyright (C) 2019 Intel Corporation.
  *   All rights reserved.
  */
+#include "spdk/stdinc.h"
+#include "spdk/config.h"
+#include "spdk/log.h"
+#include "spdk/nvme.h"
 
+#ifdef SPDK_CONFIG_NVME_CUSE
 #define FUSE_USE_VERSION 31
 
 #include <fuse3/cuse_lowlevel.h>
@@ -1345,3 +1350,41 @@ spdk_nvme_cuse_get_ns_name(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid, char *n
 }
 
 SPDK_LOG_REGISTER_COMPONENT(nvme_cuse)
+
+#else /* SPDK_CONFIG_NVME_CUSE */
+
+int
+spdk_nvme_cuse_get_ctrlr_name(struct spdk_nvme_ctrlr *ctrlr, char *name, size_t *size)
+{
+	SPDK_ERRLOG("spdk_nvme_cuse_get_ctrlr_name() is unsupported\n");
+	return -ENOTSUP;
+}
+
+int
+spdk_nvme_cuse_get_ns_name(struct spdk_nvme_ctrlr *ctrlr, uint32_t nsid, char *name, size_t *size)
+{
+	SPDK_ERRLOG("spdk_nvme_cuse_get_ns_name() is unsupported\n");
+	return -ENOTSUP;
+}
+
+int
+spdk_nvme_cuse_register(struct spdk_nvme_ctrlr *ctrlr)
+{
+	SPDK_ERRLOG("spdk_nvme_cuse_register() is unsupported\n");
+	return -ENOTSUP;
+}
+
+int
+spdk_nvme_cuse_unregister(struct spdk_nvme_ctrlr *ctrlr)
+{
+	SPDK_ERRLOG("spdk_nvme_cuse_unregister() is unsupported\n");
+	return -ENOTSUP;
+}
+
+void
+spdk_nvme_cuse_update_namespaces(struct spdk_nvme_ctrlr *ctrlr)
+{
+	SPDK_ERRLOG("spdk_nvme_cuse_update_namespaces() is unsupported\n");
+}
+
+#endif

module/blobfs/bdev/blobfs_bdev.c

@@ -297,4 +297,14 @@ invalid:
 	cb_fn(cb_arg, rc);
 }
 
+#else /* SPDK_CONFIG_FUSE */
+
+void
+spdk_blobfs_bdev_mount(const char *bdev_name, const char *mountpoint,
+		       spdk_blobfs_bdev_op_complete cb_fn, void *cb_arg)
+{
+	SPDK_ERRLOG("spdk_blobfs_bdev_mount() is unsupported\n");
+	cb_fn(cb_arg, -ENOTSUP);
+}
+
 #endif