lib: libyang.so.3 compatibilty layers

Let's support libyang 2.2.8 using libyang.so.3.0.8
It requires the commit ed277585ea from the libyang.

Signed-off-by: Vincent Jardin <vjardin@free.fr>

1 files changed, 45 insertions, 9 deletions

diff --git a/lib/yang.c b/lib/yang.c
index 013a76284..30b3d681a 100644
--- a/lib/yang.c
+++ b/lib/yang.c
@@ -11,6 +11,7 @@
 #include "lib_errors.h"
 #include "yang.h"
 #include "yang_translator.h"
+#include <libyang/version.h>
 #include "northbound.h"
 #include "frrstr.h"
 
@@ -19,6 +20,17 @@
 DEFINE_MTYPE_STATIC(LIB, YANG_MODULE, "YANG module");
 DEFINE_MTYPE_STATIC(LIB, YANG_DATA, "YANG data structure");
 
+/* Safe to remove after libyang 2.2.8 */
+#if (LY_VERSION_MAJOR < 3)
+#define yang_lyd_find_xpath3(ctx_node, tree, xpath, format, prefix_data, vars, \
+			     set)                                              \
+	lyd_find_xpath3(ctx_node, tree, xpath, vars, set)
+#else
+#define yang_lyd_find_xpath3(ctx_node, tree, xpath, format, prefix_data, vars, \
+			     set)                                              \
+	lyd_find_xpath3(ctx_node, tree, xpath, LY_VALUE_JSON, NULL, vars, set)
+#endif
+
 /* libyang container. */
 struct ly_ctx *ly_native_ctx;
 
@@ -702,7 +714,12 @@ struct yang_data *yang_data_list_find(const struct list *list,
 }
 
 /* Make libyang log its errors using FRR logging infrastructure. */
-static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path)
+static void ly_zlog_cb(LY_LOG_LEVEL level, const char *msg, const char *data_path
+#if !(LY_VERSION_MAJOR < 3)
+		       ,
+		       const char *schema_path, uint64_t line
+#endif
+)
 {
 	int priority = LOG_ERR;
 
@@ -719,8 +736,14 @@ static void ly_log_cb(LY_LOG_LEVEL level, const char *msg, const char *path)
 		break;
 	}
 
-	if (path)
-		zlog(priority, "libyang: %s (%s)", msg, path);
+	if (data_path)
+		zlog(priority, "libyang: %s (%s)", msg, data_path);
+#if !(LY_VERSION_MAJOR < 3)
+	else if (schema_path)
+		zlog(priority, "libyang %s (%s)\n", msg, schema_path);
+	else if (line)
+		zlog(priority, "libyang %s (line %" PRIu64 ")\n", msg, line);
+#endif
 	else
 		zlog(priority, "libyang: %s", msg);
 }
@@ -747,7 +770,8 @@ LY_ERR yang_parse_notification(const char *xpath, LYD_FORMAT format,
 		return err;
 	}
 
-	err = lyd_find_xpath3(NULL, tree, xpath, NULL, &set);
+	err = yang_lyd_find_xpath3(NULL, tree, xpath, LY_VALUE_JSON, NULL, NULL,
+				   &set);
 	if (err) {
 		zlog_err("Failed to parse notification: %s", ly_last_errmsg());
 		lyd_free_all(tree);
@@ -840,23 +864,29 @@ char *yang_convert_lyd_format(const char *data, size_t data_len,
 
 const char *yang_print_errors(struct ly_ctx *ly_ctx, char *buf, size_t buf_len)
 {
-	struct ly_err_item *ei;
+	const struct ly_err_item *ei;
 
 	ei = ly_err_first(ly_ctx);
 	if (!ei)
 		return "";
 
 	strlcpy(buf, "YANG error(s):\n", buf_len);
+#if (LY_VERSION_MAJOR < 3)
+#define data_path path
+#else
+#define data_path data_path
+#endif
 	for (; ei; ei = ei->next) {
-		if (ei->path) {
+		if (ei->data_path) {
 			strlcat(buf, " Path: ", buf_len);
-			strlcat(buf, ei->path, buf_len);
+			strlcat(buf, ei->data_path, buf_len);
 			strlcat(buf, "\n", buf_len);
 		}
 		strlcat(buf, " Error: ", buf_len);
 		strlcat(buf, ei->msg, buf_len);
 		strlcat(buf, "\n", buf_len);
 	}
+#undef data_path
 
 	ly_err_clean(ly_ctx, NULL);
 
@@ -908,7 +938,12 @@ struct ly_ctx *yang_ctx_new_setup(bool embedded_modules, bool explicit_compile)
 void yang_init(bool embedded_modules, bool defer_compile)
 {
 	/* Initialize libyang global parameters that affect all containers. */
-	ly_set_log_clb(ly_log_cb, 1);
+	ly_set_log_clb(ly_zlog_cb
+#if (LY_VERSION_MAJOR < 3)
+		       ,
+		       1
+#endif
+	);
 	ly_log_options(LY_LOLOG | LY_LOSTORE);
 
 	/* Initialize libyang container for native models. */
@@ -1246,7 +1281,8 @@ LY_ERR yang_lyd_trim_xpath(struct lyd_node **root, const char *xpath)
 
 	*root = lyd_first_sibling(*root);
 
-	err = lyd_find_xpath3(NULL, *root, xpath, NULL, &set);
+	err = yang_lyd_find_xpath3(NULL, *root, xpath, LY_VALUE_JSON, NULL,
+				   NULL, &set);
 	if (err) {
 		flog_err_sys(EC_LIB_LIBYANG,
 			     "cannot obtain specific result for xpath \"%s\": %s",