util: move nvme_strerror to libraray

This is a useful helper which can be reused inside the library as well.

Signed-off-by: Daniel Wagner <[email protected]>

Author: igaw

libnvme/src/libnvme.map

@@ -247,6 +247,7 @@ LIBNVME_2_0 {
 		nvme_skip_namespaces;
 		nvme_status_to_errno;
 		nvme_status_to_string;
+		nvme_strerror;
 		nvme_submit_admin_passthru;
 		nvme_submit_io_passthru;
 		nvme_subsys_filter;

libnvme/src/nvme/util.c

@@ -641,6 +641,13 @@ const char *nvme_errno_to_string(int status)
 	return s;
 }
 
+const char *nvme_strerror(int errnum)
+{
+	if (errnum >= ENVME_CONNECT_RESOLVE)
+		return nvme_errno_to_string(errnum);
+	return strerror(errnum);
+}
+
 #ifdef HAVE_NETDB
 int hostname2traddr(struct nvme_global_ctx *ctx, const char *traddr,
 		    char **hostname)

libnvme/src/nvme/util.h

@@ -95,6 +95,15 @@ const char *nvme_status_to_string(int status, bool fabrics);
  */
 const char *nvme_errno_to_string(int err);
 
+/**
+ * nvme_strerror() - Returns string describing nvme errors and errno
+ * @err: Returned error codes from all libnvme functions
+ *
+ * Return: String representation of either the nvme connect error codes
+ * (positive values) or errno string (negative values)
+ */
+const char *nvme_strerror(int errnum);
+
 /**
  * nvme_init_ctrl_list() - Initialize an nvme_ctrl_list structure from an array.
  * @cntlist:   The controller list structure to initialize

nvme.c

@@ -314,13 +314,6 @@ static OPT_VALS(feature_name) = {
 	VAL_END()
 };
 
-const char *nvme_strerror(int errnum)
-{
-	if (errnum >= ENVME_CONNECT_RESOLVE)
-		return nvme_errno_to_string(errnum);
-	return strerror(errnum);
-}
-
 static ssize_t getrandom_bytes(void *buf, size_t buflen)
 {
 	ssize_t result;