block/nbd: Use URI parsing code from glib

Since version 2.66, glib has useful URI parsing functions, too.
Use those instead of the QEMU-internal ones to be finally able
to get rid of the latter. The g_uri_get_host() also takes care
of removing the square brackets from IPv6 addresses, so we can
drop that part of the QEMU code now, too.

Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-ID: <20240418101056.302103-11-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

block/nbd.c

@@ -31,7 +31,6 @@
 #include "qemu/osdep.h"
 
 #include "trace.h"
-#include "qemu/uri.h"
 #include "qemu/option.h"
 #include "qemu/cutils.h"
 #include "qemu/main-loop.h"
@@ -1514,30 +1513,31 @@ static void nbd_client_close(BlockDriverState *bs)
 
 static int nbd_parse_uri(const char *filename, QDict *options)
 {
-    URI *uri;
+    g_autoptr(GUri) uri = g_uri_parse(filename, G_URI_FLAGS_NONE, NULL);
+    g_autoptr(GHashTable) qp = NULL;
     const char *p;
-    QueryParams *qp = NULL;
+    int qp_n;
-    int ret = 0;
     bool is_unix;
+    const char *uri_scheme, *uri_query, *uri_server;
+    int uri_port;
 
-    uri = uri_parse(filename);
     if (!uri) {
         return -EINVAL;
     }
 
     /* transport */
-    if (!g_strcmp0(uri->scheme, "nbd")) {
+    uri_scheme = g_uri_get_scheme(uri);
+    if (!g_strcmp0(uri_scheme, "nbd")) {
         is_unix = false;
-    } else if (!g_strcmp0(uri->scheme, "nbd+tcp")) {
+    } else if (!g_strcmp0(uri_scheme, "nbd+tcp")) {
         is_unix = false;
-    } else if (!g_strcmp0(uri->scheme, "nbd+unix")) {
+    } else if (!g_strcmp0(uri_scheme, "nbd+unix")) {
         is_unix = true;
     } else {
-        ret = -EINVAL;
+        return -EINVAL;
-        goto out;
     }
 
-    p = uri->path ? uri->path : "";
+    p = g_uri_get_path(uri) ?: "";
     if (p[0] == '/') {
         p++;
     }
@@ -1545,52 +1545,50 @@ static int nbd_parse_uri(const char *filename, QDict *options)
         qdict_put_str(options, "export", p);
     }
 
-    qp = query_params_parse(uri->query);
+    uri_query = g_uri_get_query(uri);
-    if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) {
+    if (uri_query) {
-        ret = -EINVAL;
+        qp = g_uri_parse_params(uri_query, -1, "&", G_URI_PARAMS_NONE, NULL);
-        goto out;
+        if (!qp) {
+            return -EINVAL;
+        }
+        qp_n = g_hash_table_size(qp);
+        if (qp_n > 1 || (is_unix && !qp_n) || (!is_unix && qp_n)) {
+            return -EINVAL;
+        }
+     }
+
+    uri_server = g_uri_get_host(uri);
+    if (uri_server && !uri_server[0]) {
+        uri_server = NULL;
     }
+    uri_port = g_uri_get_port(uri);
 
     if (is_unix) {
         /* nbd+unix:///export?socket=path */
-        if (uri->server || uri->port || strcmp(qp->p[0].name, "socket")) {
+        const char *uri_socket = g_hash_table_lookup(qp, "socket");
-            ret = -EINVAL;
+        if (uri_server || uri_port != -1 || !uri_socket) {
-            goto out;
+            return -EINVAL;
         }
         qdict_put_str(options, "server.type", "unix");
-        qdict_put_str(options, "server.path", qp->p[0].value);
+        qdict_put_str(options, "server.path", uri_socket);
     } else {
-        QString *host;
         char *port_str;
 
         /* nbd[+tcp]://host[:port]/export */
-        if (!uri->server) {
+        if (!uri_server) {
-            ret = -EINVAL;
+            return -EINVAL;
-            goto out;
-        }
-
-        /* strip braces from literal IPv6 address */
-        if (uri->server[0] == '[') {
-            host = qstring_from_substr(uri->server, 1,
-                                       strlen(uri->server) - 1);
-        } else {
-            host = qstring_from_str(uri->server);
         }
 
         qdict_put_str(options, "server.type", "inet");
-        qdict_put(options, "server.host", host);
+        qdict_put_str(options, "server.host", uri_server);
 
-        port_str = g_strdup_printf("%d", uri->port ?: NBD_DEFAULT_PORT);
+        port_str = g_strdup_printf("%d", uri_port > 0 ? uri_port
+                                                      : NBD_DEFAULT_PORT);
         qdict_put_str(options, "server.port", port_str);
         g_free(port_str);
     }
 
-out:
+    return 0;
-    if (qp) {
-        query_params_free(qp);
-    }
-    uri_free(uri);
-    return ret;
 }
 
 static bool nbd_has_filename_options_conflict(QDict *options, Error **errp)