include: wrap header files in extern "C" for c++

Update all the header files in include/spdk to include
extern "C" declarations.

Change-Id: I43299f68e962d0df18c1b23fbbaa19bc924fcb96
Signed-off-by: Dave Boutcher <dboutcher@ocient.com>
Reviewed-on: https://review.gerrithub.io/390896
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

include/spdk/bdev.h

@@ -44,6 +44,10 @@
 #include "spdk/scsi_spec.h"
 #include "spdk/nvme_spec.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SPDK_BDEV_SMALL_BUF_MAX_SIZE 8192
 #define SPDK_BDEV_LARGE_BUF_MAX_SIZE (64 * 1024)
 
@@ -751,4 +755,8 @@ void spdk_bdev_io_get_scsi_status(const struct spdk_bdev_io *bdev_io,
  */
 void spdk_bdev_io_get_iovec(struct spdk_bdev_io *bdev_io, struct iovec **iovp, int *iovcntp);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_BDEV_H_ */

include/spdk/blob.h

@@ -68,6 +68,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef uint64_t spdk_blob_id;
 #define SPDK_BLOBID_INVALID	(uint64_t)-1
 #define SPDK_BLOBSTORE_TYPE_LENGTH 16
@@ -305,4 +309,8 @@ void spdk_xattr_names_free(struct spdk_xattr_names *names);
 struct spdk_bs_type spdk_bs_get_bstype(struct spdk_blob_store *bs);
 void spdk_bs_set_bstype(struct spdk_blob_store *bs, struct spdk_bs_type bstype);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_BLOB_H_ */

include/spdk/blobfs.h

@@ -42,6 +42,10 @@
 
 #include "spdk/blob.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SPDK_FILE_NAME_MAX	255
 
 struct spdk_file;
@@ -129,4 +133,8 @@ void spdk_file_set_priority(struct spdk_file *file, uint32_t priority);
 
 int spdk_file_sync(struct spdk_file *file, struct spdk_io_channel *channel);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_FS_H_ */

include/spdk/conf.h

@@ -41,6 +41,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct spdk_conf_value;
 struct spdk_conf_item;
 struct spdk_conf_section;
@@ -67,4 +71,8 @@ bool spdk_conf_section_get_boolval(struct spdk_conf_section *sp, const char *key
 
 void spdk_conf_set_as_default(struct spdk_conf *cp);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/copy_engine.h

@@ -40,6 +40,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef void (*spdk_copy_completion_cb)(void *ref, int status);
 typedef void (*spdk_copy_fini_cb)(void *cb_arg);
 
@@ -58,4 +62,8 @@ int spdk_copy_submit_fill(struct spdk_copy_task *copy_req, struct spdk_io_channe
 			  void *dst, uint8_t fill, uint64_t nbytes, spdk_copy_completion_cb cb);
 size_t spdk_copy_task_size(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/crc32.h

@@ -42,6 +42,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * IEEE CRC-32 polynomial (bit reflected)
  */
@@ -98,4 +102,8 @@ uint32_t spdk_crc32_ieee_update(const void *buf, size_t len, uint32_t crc);
  */
 uint32_t spdk_crc32c_update(const void *buf, size_t len, uint32_t crc);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_CRC32_H */

include/spdk/event.h

@@ -46,6 +46,10 @@
 #include "spdk/queue.h"
 #include "spdk/log.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef void (*spdk_event_fn)(void *arg1, void *arg2);
 
 /**
@@ -193,4 +197,8 @@ void spdk_reactor_enable_context_switch_monitor(bool enabled);
  */
 bool spdk_reactor_context_switch_monitor_enabled(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/io_channel.h

@@ -42,6 +42,10 @@
 
 #include "spdk/queue.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct spdk_thread;
 struct spdk_io_channel;
 struct spdk_poller;
@@ -220,4 +224,8 @@ struct spdk_thread *spdk_io_channel_get_thread(struct spdk_io_channel *ch);
 void spdk_for_each_channel(void *io_device, spdk_channel_msg fn, void *ctx,
 			   spdk_channel_for_each_cpl cpl);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_IO_CHANNEL_H_ */

include/spdk/json.h

@@ -41,6 +41,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 enum spdk_json_val_type {
 	SPDK_JSON_VAL_INVALID,
 	SPDK_JSON_VAL_NULL,
@@ -237,4 +241,8 @@ int spdk_json_write_val(struct spdk_json_write_ctx *w, const struct spdk_json_va
  */
 int spdk_json_write_val_raw(struct spdk_json_write_ctx *w, const void *data, size_t len);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/jsonrpc.h

@@ -43,6 +43,10 @@
 
 #include "spdk/json.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SPDK_JSONRPC_ERROR_PARSE_ERROR		-32700
 #define SPDK_JSONRPC_ERROR_INVALID_REQUEST	-32600
 #define SPDK_JSONRPC_ERROR_METHOD_NOT_FOUND	-32601
@@ -103,4 +107,8 @@ void spdk_jsonrpc_end_result(struct spdk_jsonrpc_request *request, struct spdk_j
 void spdk_jsonrpc_send_error_response(struct spdk_jsonrpc_request *request,
 				      int error_code, const char *msg);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/log.h

@@ -41,6 +41,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Initialize the logging module. Messages prior
  * to this call will be dropped.
@@ -102,4 +106,8 @@ int spdk_log_clear_trace_flag(const char *flag);
 
 void spdk_tracelog_usage(FILE *f, const char *trace_arg);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_LOG_H */

include/spdk/lvol.h

@@ -40,6 +40,10 @@
 
 #include "spdk/stdinc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct spdk_bs_dev;
 struct spdk_lvol_store;
 struct spdk_lvol;
@@ -173,5 +177,8 @@ void spdk_lvs_load(struct spdk_bs_dev *bs_dev, spdk_lvs_op_with_handle_complete
 		   void *cb_arg);
 void spdk_lvol_open(struct spdk_lvol *lvol, spdk_lvol_op_with_handle_complete cb_fn, void *cb_arg);
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif  /* SPDK_LVOL_H */

include/spdk/nbd.h

@@ -34,6 +34,10 @@
 #ifndef SPDK_NBD_H_
 #define SPDK_NBD_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct spdk_bdev;
 struct spdk_nbd_disk;
 
@@ -45,4 +49,8 @@ struct spdk_nbd_disk *spdk_nbd_start(const char *bdev_name, const char *nbd_path
 
 void spdk_nbd_stop(struct spdk_nbd_disk *nbd);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/net.h

@@ -42,6 +42,10 @@
 
 #include "spdk/queue.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define IDLE_INTERVAL_TIME_IN_US 5000
 
 int spdk_interface_init(void);
@@ -83,4 +87,8 @@ int spdk_sock_set_sendbuf(int sock, int sz);
 bool spdk_sock_is_ipv6(int sock);
 bool spdk_sock_is_ipv4(int sock);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_NET_FRAMEWORK_H */

include/spdk/nvmf.h

@@ -45,6 +45,10 @@
 #include "spdk/nvmf_spec.h"
 #include "spdk/queue.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct spdk_nvmf_tgt;
 struct spdk_nvmf_subsystem;
 struct spdk_nvmf_ctrlr;
@@ -322,4 +326,8 @@ void spdk_nvmf_handle_connect(struct spdk_nvmf_request *req);
 
 void spdk_nvmf_ctrlr_disconnect(struct spdk_nvmf_qpair *qpair);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/rpc.h

@@ -38,6 +38,10 @@
 
 #include "spdk/jsonrpc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int spdk_rpc_listen(const char *listen_addr);
 void spdk_rpc_accept(void);
 void spdk_rpc_close(void);
@@ -53,4 +57,8 @@ static void __attribute__((constructor)) rpc_register_##func(void) \
 	spdk_rpc_register_method(method, func); \
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

include/spdk/scsi.h

@@ -43,6 +43,10 @@
 
 #include "spdk/queue.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Defines for SPDK tracing framework */
 #define OWNER_SCSI_DEV				0x10
 #define OBJECT_SCSI_TASK			0x10
@@ -266,4 +270,8 @@ spdk_scsi_task_get_primary(struct spdk_scsi_task *task)
 	}
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_SCSI_H */

include/spdk/vhost.h

@@ -43,6 +43,10 @@
 
 #include "spdk/event.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int spdk_vhost_init(void);
 void spdk_vhost_fini(void);
 
@@ -291,4 +295,8 @@ void spdk_vhost_call_external_event(const char *vdev_name, spdk_vhost_event_fn f
  */
 void spdk_vhost_call_external_event_foreach(spdk_vhost_event_fn fn, void *arg);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* SPDK_VHOST_H */