Merge branch 'master' into net-next

man/man8/Makefile

@@ -14,7 +14,7 @@ MAN8PAGES = $(TARGETS) ip.8 arpd.8 lnstat.8 routel.8 rtacct.8 rtmon.8 rtpr.8 ss.
 	tipc.8 tipc-bearer.8 tipc-link.8 tipc-media.8 tipc-nametable.8 \
 	tipc-node.8 tipc-socket.8 \
 	tc-basic.8 tc-cgroup.8 tc-flow.8 tc-flower.8 tc-fw.8 tc-route.8 \
-	tc-tcindex.8 tc-u32.8 \
+	tc-tcindex.8 tc-u32.8 tc-matchall.8 \
 	tc-connmark.8 tc-csum.8 tc-mirred.8 tc-nat.8 tc-pedit.8 tc-police.8 \
 	tc-simple.8 tc-skbedit.8 tc-vlan.8 tc-xt.8 \
 	devlink.8 devlink-dev.8 devlink-monitor.8 devlink-port.8 devlink-sb.8

man/man8/tc-matchall.8

@@ -0,0 +1,76 @@
+.TH "Match-all classifier in tc" 8 "21 Oct 2015" "iproute2" "Linux"
+
+.SH NAME
+matchall \- traffic control filter that matches every packet
+.SH SYNOPSIS
+.in +8
+.ti -8
+.BR tc " " filter " ... " matchall " [ "
+.BR skip_sw " | " skip_hw
+.R " ] [ "
+.B action
+.IR ACTION_SPEC " ] [ "
+.B classid
+.IR CLASSID " ]"
+.SH DESCRIPTION
+The
+.B matchall
+filter allows to classify every packet that flows on the port and run a
+action on it.
+.SH OPTIONS
+.TP
+.BI action " ACTION_SPEC"
+Apply an action from the generic actions framework on matching packets.
+.TP
+.BI classid " CLASSID"
+Push matching packets into the class identified by
+.IR CLASSID .
+.TP
+.BI skip_sw
+Do not process filter by software. If hardware has no offload support for this
+filter, or TC offload is not enabled for the interface, operation will fail.
+.TP
+.BI skip_hw
+Do not process filter by hardware.
+.SH EXAMPLES
+To create ingress mirroring from port eth1 to port eth2:
+.RS
+.EX
+
+tc qdisc  add dev eth1 handle ffff: ingress
+tc filter add dev eth1 parent ffff:           \\
+        matchall skip_sw                      \\
+        action mirred egress mirror           \\
+        dev eth2
+.EE
+.RE
+
+The first command creats an ingress qdisc with handle
+.BR ffff:
+on device
+.BR eth1
+where the second command attaches a matchall filters on it that mirrors the
+packets to device eth2.
+
+To create egress mirroring from port eth1 to port eth2:
+.EX
+
+tc qdisc add dev eth1 handle 1: root prio
+tc filter add dev eth1 parent 1:               \\
+        matchall skip_sw                       \\
+        action mirred egress mirror            \\
+        dev eth2
+.EE
+.RE
+
+The first command creats an egress qdisc with handle
+.BR 1:
+that replaces the root qdisc on device
+.BR eth1
+where the second command attaches a matchall filters on it that mirrors the
+packets to device eth2.
+
+
+.EE
+.SH SEE ALSO
+.BR tc (8),

man/man8/tc.8

@@ -187,6 +187,11 @@ u32
 Generic filtering on arbitrary packet data, assisted by syntax to abstract common operations. See
 .BR tc-u32 (8)
 for details.
+.TP
+matchall
+Traffic control filter that matches every packet. See
+.BR tc-matchall (8)
+for details.
 
 .SH CLASSLESS QDISCS
 The classless qdiscs are:

tc/Makefile

@@ -67,6 +67,7 @@ TCMODULES += q_pie.o
 TCMODULES += q_hhf.o
 TCMODULES += q_clsact.o
 TCMODULES += e_bpf.o
+TCMODULES += f_matchall.o
 
 ifeq ($(TC_CONFIG_IPSET), y)
   ifeq ($(TC_CONFIG_XT), y)

tc/f_matchall.c

@@ -0,0 +1,143 @@
+/*
+ * f_matchall.c		Match-all Classifier
+ *
+ *		This program is free software; you can distribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ *
+ * Authors:	Jiri Pirko <jiri@mellanox.com>, Yotam Gigi <yotamg@mellanox.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+	fprintf(stderr, "Usage: ... matchall [skip_sw | skip_hw]\n");
+	fprintf(stderr, "                 [ action ACTION_SPEC ] [ classid CLASSID ]\n");
+	fprintf(stderr, "\n");
+	fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n");
+	fprintf(stderr, "       FILTERID := X:Y:Z\n");
+	fprintf(stderr, "       ACTION_SPEC := ... look at individual actions\n");
+	fprintf(stderr, "\nNOTE: CLASSID is parsed as hexadecimal input.\n");
+}
+
+static int matchall_parse_opt(struct filter_util *qu, char *handle,
+			   int argc, char **argv, struct nlmsghdr *n)
+{
+	struct tcmsg *t = NLMSG_DATA(n);
+	struct rtattr *tail;
+	__u32 flags = 0;
+	long h = 0;
+
+	if (handle) {
+		h = strtol(handle, NULL, 0);
+		if (h == LONG_MIN || h == LONG_MAX) {
+			fprintf(stderr, "Illegal handle \"%s\", must be numeric.\n",
+			    handle);
+			return -1;
+		}
+	}
+	t->tcm_handle = h;
+
+	if (argc == 0)
+		return 0;
+
+	tail = (struct rtattr *)(((void *)n)+NLMSG_ALIGN(n->nlmsg_len));
+	addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
+
+	while (argc > 0) {
+		if (matches(*argv, "classid") == 0 ||
+			   strcmp(*argv, "flowid") == 0) {
+			unsigned int handle;
+
+			NEXT_ARG();
+			if (get_tc_classid(&handle, *argv)) {
+				fprintf(stderr, "Illegal \"classid\"\n");
+				return -1;
+			}
+			addattr_l(n, MAX_MSG, TCA_MATCHALL_CLASSID, &handle, 4);
+		} else if (matches(*argv, "action") == 0) {
+			NEXT_ARG();
+			if (parse_action(&argc, &argv, TCA_MATCHALL_ACT, n)) {
+				fprintf(stderr, "Illegal \"action\"\n");
+				return -1;
+			}
+			continue;
+
+		} else if (strcmp(*argv, "skip_hw") == 0) {
+			NEXT_ARG();
+			flags |= TCA_CLS_FLAGS_SKIP_HW;
+			continue;
+		} else if (strcmp(*argv, "skip_sw") == 0) {
+			NEXT_ARG();
+			flags |= TCA_CLS_FLAGS_SKIP_SW;
+			continue;
+		} else if (strcmp(*argv, "help") == 0) {
+			explain();
+			return -1;
+		} else {
+			fprintf(stderr, "What is \"%s\"?\n", *argv);
+			explain();
+			return -1;
+		}
+		argc--; argv++;
+	}
+
+	if (flags) {
+		if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW |
+			       TCA_CLS_FLAGS_SKIP_SW))) {
+			fprintf(stderr,
+				"skip_hw and skip_sw are mutually exclusive\n");
+			return -1;
+		}
+		addattr_l(n, MAX_MSG, TCA_MATCHALL_FLAGS, &flags, 4);
+	}
+
+	tail->rta_len = (((void *)n)+n->nlmsg_len) - (void *)tail;
+	return 0;
+}
+
+static int matchall_print_opt(struct filter_util *qu, FILE *f,
+			   struct rtattr *opt, __u32 handle)
+{
+	struct rtattr *tb[TCA_MATCHALL_MAX+1];
+
+	if (opt == NULL)
+		return 0;
+
+	parse_rtattr_nested(tb, TCA_MATCHALL_MAX, opt);
+
+	if (handle)
+		fprintf(f, "handle 0x%x ", handle);
+
+	if (tb[TCA_MATCHALL_CLASSID]) {
+		SPRINT_BUF(b1);
+		fprintf(f, "flowid %s ",
+			sprint_tc_classid(rta_getattr_u32(tb[TCA_MATCHALL_CLASSID]), b1));
+	}
+
+	if (tb[TCA_MATCHALL_ACT])
+		tc_print_action(f, tb[TCA_MATCHALL_ACT]);
+
+	return 0;
+}
+
+struct filter_util matchall_filter_util = {
+	.id = "matchall",
+	.parse_fopt = matchall_parse_opt,
+	.print_fopt = matchall_print_opt,
+};