nl-class-add tool

Adds a cli based tool to add/update traffic classes. This tool requires
each class to be supported via the respetive qdisc module in
pkglibdir/cli/qdisc/$name.so.

Syntax:
nl-class-add --dev eth2 --parent 1: --id 1:1 htb --rate 100mbit
nl-class-add --update --dev eth2 --id 1:1 htb --rate 200mbit

7 files changed, 240 insertions, 2 deletions

diff --git a/src/.gitignore b/src/.gitignore
index 12859cb..cacaa3c 100644
--- a/src/.gitignore
+++ b/src/.gitignore
@@ -21,6 +21,7 @@ nl-neightbl-list
 nl-qdisc-add
 nl-qdisc-delete
 nl-qdisc-list
+nl-class-add
 nl-route-add
 nl-route-delete
 nl-route-list
diff --git a/src/Makefile.am b/src/Makefile.am
index 4a7f98f..1a6f080 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -7,6 +7,7 @@ AM_LDFLAGS = -L${top_builddir}/lib -L${top_builddir}/src/lib -lnl-cli
 
 sbin_PROGRAMS = \
 	nl-qdisc-add \
+	nl-class-add \
 	nl-classid-lookup
 
 noinst_PROGRAMS = \
@@ -77,6 +78,9 @@ nl_qdisc_delete_LDADD = -lnl-route
 nl_qdisc_list_SOURCES = nl-qdisc-list.c
 nl_qdisc_list_LDADD = -lnl-route
 
+nl_class_add_SOURCES = nl-class-add.c
+nl_class_add_LDADD = -lnl-route
+
 nl_route_add_SOURCES = nl-route-add.c
 nl_route_add_LDADD = -lnl-route
 nl_route_delete_SOURCES = nl-route-delete.c
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 2b48876..1ed5912 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -34,6 +34,6 @@ libnl_cli_la_LIBADD  = ${top_builddir}/lib/libnl.la \
 		       ${top_builddir}/lib/libnl-genl.la
 
 libnl_cli_la_SOURCES = \
-	utils.c addr.c ct.c link.c neigh.c qdisc.c rule.c route.c
+	utils.c addr.c ct.c link.c neigh.c qdisc.c class.c rule.c route.c
 #	cls/ematch_syntax.c cls/ematch_grammar.c cls/ematch.c
 #	cls/pktloc_syntax.c cls/pktloc_grammar.c cls/utils.c
diff --git a/src/lib/class.c b/src/lib/class.c
new file mode 100644
index 0000000..93346d5
--- /dev/null
+++ b/src/lib/class.c
@@ -0,0 +1,71 @@
+/*
+ * src/lib/class.c     CLI Class Helpers
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation version 2.1
+ *	of the License.
+ *
+ * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
+ */
+
+/**
+ * @ingroup cli
+ * @defgroup cli_class Traffic Classes
+ * @{
+ */
+
+#include <netlink/cli/utils.h>
+#include <netlink/cli/class.h>
+
+struct rtnl_class *nl_cli_class_alloc(void)
+{
+	struct rtnl_class *class;
+
+	class = rtnl_class_alloc();
+	if (!class)
+		nl_cli_fatal(ENOMEM, "Unable to allocate class object");
+
+	return class;
+}
+
+void nl_cli_class_parse_dev(struct rtnl_class *class, struct nl_cache *link_cache, char *arg)
+{
+	int ival;
+
+	if (!(ival = rtnl_link_name2i(link_cache, arg)))
+		nl_cli_fatal(ENOENT, "Link \"%s\" does not exist", arg);
+
+	rtnl_class_set_ifindex(class, ival);
+}
+
+void nl_cli_class_parse_parent(struct rtnl_class *class, char *arg)
+{
+	uint32_t parent;
+	int err;
+
+	if ((err = rtnl_tc_str2handle(arg, &parent)) < 0)
+		nl_cli_fatal(err, "Unable to parse handle \"%s\": %s",
+		      arg, nl_geterror(err));
+
+	rtnl_class_set_parent(class, parent);
+}
+
+void nl_cli_class_parse_handle(struct rtnl_class *class, char *arg)
+{
+	uint32_t handle;
+	int err;
+
+	if ((err = rtnl_tc_str2handle(arg, &handle)) < 0)
+		nl_cli_fatal(err, "Unable to parse classid \"%s\": %s",
+		      arg, nl_geterror(err));
+
+	rtnl_class_set_handle(class, handle);
+}
+
+void nl_cli_class_parse_kind(struct rtnl_class *class, char *arg)
+{
+	rtnl_class_set_kind(class, arg);
+}
+
+/** @} */
diff --git a/src/lib/qdisc.c b/src/lib/qdisc.c
index 52b7a6a..8b16f3f 100644
--- a/src/lib/qdisc.c
+++ b/src/lib/qdisc.c
@@ -17,6 +17,8 @@
 
 #include <netlink/cli/utils.h>
 #include <netlink/cli/qdisc.h>
+#include <netlink/route/class.h>
+#include <netlink/route/class-modules.h>
 
 struct rtnl_qdisc *nl_cli_qdisc_alloc(void)
 {
@@ -81,6 +83,17 @@ struct nl_cli_qdisc_module *__nl_cli_qdisc_lookup(struct rtnl_qdisc_ops *ops)
 	return NULL;
 }
 
+struct nl_cli_qdisc_module *__nl_cli_class_lookup(struct rtnl_class_ops *ops)
+{
+	struct nl_cli_qdisc_module *qm;
+
+	nl_list_for_each_entry(qm, &qdisc_modules, qm_list)
+		if (qm->qm_class_ops == ops)
+			return qm;
+
+	return NULL;
+}
+
 struct nl_cli_qdisc_module *nl_cli_qdisc_lookup(struct rtnl_qdisc_ops *ops)
 {
 	struct nl_cli_qdisc_module *qm;
@@ -99,6 +112,24 @@ struct nl_cli_qdisc_module *nl_cli_qdisc_lookup(struct rtnl_qdisc_ops *ops)
 	return qm;
 }
 
+struct nl_cli_qdisc_module *nl_cli_qdisc_lookup_by_class(struct rtnl_class_ops *ops)
+{
+	struct nl_cli_qdisc_module *qm;
+
+	if ((qm = __nl_cli_class_lookup(ops)))
+		return qm;
+
+	nl_cli_load_module("cli/qdisc", ops->co_kind);
+
+	if (!(qm = __nl_cli_class_lookup(ops)))  {
+		nl_cli_fatal(EINVAL, "Application bug: The shared library for "
+			"the class \"%s\" was successfully loaded but it "
+			"seems that module did not register itself");
+	}
+
+	return qm;
+}
+
 void nl_cli_qdisc_register(struct nl_cli_qdisc_module *qm)
 {
 	struct rtnl_qdisc_ops *ops;
@@ -114,6 +145,8 @@ void nl_cli_qdisc_register(struct nl_cli_qdisc_module *qm)
 	}
 
 	qm->qm_ops = ops;
+	qm->qm_class_ops = __rtnl_class_lookup_ops(qm->qm_name);
+
 	nl_list_add_tail(&qm->qm_list, &qdisc_modules);
 }
 
diff --git a/src/nl-class-add.c b/src/nl-class-add.c
new file mode 100644
index 0000000..6e1c402
--- /dev/null
+++ b/src/nl-class-add.c
@@ -0,0 +1,129 @@
+/*
+ * src/nl-class-add.c     Add/Update/Replace Traffic Class
+ *
+ *	This library is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU Lesser General Public
+ *	License as published by the Free Software Foundation version 2.1
+ *	of the License.
+ *
+ * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
+ */
+
+#include <netlink/cli/utils.h>
+#include <netlink/cli/qdisc.h>
+#include <netlink/cli/class.h>
+#include <netlink/cli/link.h>
+
+static int quiet = 0;
+
+static void print_usage(void)
+{
+	printf(
+"Usage: nl-class-add [OPTIONS]... class [CONFIGURATION]...\n"
+"\n"
+"OPTIONS\n"
+" -q, --quiet               Do not print informal notifications.\n"
+" -h, --help                Show this help text.\n"
+" -v, --version             Show versioning information.\n"
+"     --update              Update class if it exists.\n"
+"     --update-only         Only update class, never create it.\n"
+" -d, --dev=DEV             Network device the class should be attached to.\n"
+" -i, --id=ID               ID of new class (default: auto-generated)r\n"
+" -p, --parent=ID           ID of parent { root | ingress | class-ID }\n"
+"\n"
+"CONFIGURATION\n"
+" -h, --help                Show help text of class specific options.\n"
+"\n"
+"EXAMPLE\n"
+"   $ nl-class-add --dev=eth1 --parent=root htb --rate=100mbit\n"
+"\n"
+	);
+	exit(0);
+}
+
+int main(int argc, char *argv[])
+{
+	struct nl_sock *sock;
+	struct rtnl_class *class;
+	struct nl_cache *link_cache;
+	struct nl_dump_params dp = {
+		.dp_type = NL_DUMP_DETAILS,
+		.dp_fd = stdout,
+	};
+	struct nl_cli_qdisc_module *qm;
+	struct rtnl_class_ops *ops;
+	int err, flags = NLM_F_CREATE | NLM_F_EXCL;
+	char *kind;
+ 
+	sock = nl_cli_alloc_socket();
+	nl_cli_connect(sock, NETLINK_ROUTE);
+
+	link_cache = nl_cli_link_alloc_cache(sock);
+
+ 	class = nl_cli_class_alloc();
+ 
+	for (;;) {
+		int c, optidx = 0;
+		enum {
+			ARG_UPDATE = 257,
+			ARG_UPDATE_ONLY = 258,
+		};
+		static struct option long_opts[] = {
+			{ "quiet", 0, 0, 'q' },
+			{ "help", 0, 0, 'h' },
+			{ "version", 0, 0, 'v' },
+			{ "dev", 1, 0, 'd' },
+			{ "parent", 1, 0, 'p' },
+			{ "id", 1, 0, 'i' },
+			{ "update", 0, 0, ARG_UPDATE },
+			{ "update-only", 0, 0, ARG_UPDATE_ONLY },
+			{ 0, 0, 0, 0 }
+		};
+	
+		c = getopt_long(argc, argv, "+qhvd:p:i:",
+				long_opts, &optidx);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'q': quiet = 1; break;
+		case 'h': print_usage(); break;
+		case 'v': nl_cli_print_version(); break;
+		case 'd': nl_cli_class_parse_dev(class, link_cache, optarg); break;
+		case 'p': nl_cli_class_parse_parent(class, optarg); break;
+		case 'i': nl_cli_class_parse_handle(class, optarg); break;
+		case ARG_UPDATE: flags = NLM_F_CREATE; break;
+		case ARG_UPDATE_ONLY: flags = 0; break;
+		}
+ 	}
+
+	if (optind >= argc)
+		print_usage();
+
+	if (!rtnl_class_get_ifindex(class))
+		nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
+
+	if (!rtnl_class_get_parent(class))
+		nl_cli_fatal(EINVAL, "You must specify a parent (--parent=XXX)");
+
+	kind = argv[optind++];
+	rtnl_class_set_kind(class, kind);
+
+	if (!(ops = rtnl_class_lookup_ops(class)))
+		nl_cli_fatal(ENOENT, "Unknown class \"%s\"", kind);
+
+	if (!(qm = nl_cli_qdisc_lookup_by_class(ops)))
+		nl_cli_fatal(ENOTSUP, "class type \"%s\" not supported.", kind);
+
+	qm->qm_parse_class_argv(class, argc, argv);
+
+	if (!quiet) {
+		printf("Adding ");
+		nl_object_dump(OBJ_CAST(class), &dp);
+ 	}
+
+	if ((err = rtnl_class_add(sock, class, flags)) < 0)
+		nl_cli_fatal(EINVAL, "Unable to add class: %s", nl_geterror(err));
+
+	return 0;
+}
diff --git a/src/nl-qdisc-add.c b/src/nl-qdisc-add.c
index cb2b129..739a6ed 100644
--- a/src/nl-qdisc-add.c
+++ b/src/nl-qdisc-add.c
@@ -122,7 +122,7 @@ int main(int argc, char *argv[])
 	if (!(qm = nl_cli_qdisc_lookup(ops)))
 		nl_cli_fatal(ENOTSUP, "Qdisc type \"%s\" not supported.", kind);
 
-	qm->qm_parse_argv(qdisc, argc, argv);
+	qm->qm_parse_qdisc_argv(qdisc, argc, argv);
 
 	if (!quiet) {
 		printf("Adding ");