@@ -767,4 +767,17 @@ enum {
TCF_EM_OPND_LT
};
+/* skbhash filter */
+
+enum {
+ TCA_SKBHASH_UNSPEC,
+ TCA_SKBHASH_CLASSID,
+ TCA_SKBHASH_POLICE,
+ TCA_SKBHASH_ACT,
+ TCA_SKBHASH_MASK,
+ __TCA_SKBHASH_MAX
+};
+
+#define TCA_SKBHASH_MAX (__TCA_SKBHASH_MAX - 1)
+
#endif
@@ -29,6 +29,7 @@ TCMODULES += f_bpf.o
TCMODULES += f_flow.o
TCMODULES += f_cgroup.o
TCMODULES += f_flower.o
+TCMODULES += f_skbhash.o
TCMODULES += q_dsmark.o
TCMODULES += q_gred.o
TCMODULES += f_tcindex.o
new file mode 100644
@@ -0,0 +1,140 @@
+/*
+ * f_skbhash.c SKBHASH filter.
+ *
+ * This program is free software; you can redistribute 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: J Hadi Salim <jhs@mojatatu.com>
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h> /* IFNAMSIZ */
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr,
+ "Usage: ... skbhash [ classid CLASSID ] [ indev DEV ] [ action ACTION_SPEC ]\n"
+ " CLASSID := Push matching packets to the class identified by CLASSID with format X:Y\n"
+ " CLASSID is parsed as hexadecimal input.\n"
+ " ACTION_SPEC := Apply an action on matching packets.\n"
+ " NOTE: handle is represented as HANDLE[/SKBHASHMASK].\n"
+ " SKBHASHMASK is 0xffffffff by default.\n");
+}
+
+static int skbhash_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 mask = 0;
+ int mask_set = 0;
+
+ if (handle) {
+ char *slash;
+
+ if ((slash = strchr(handle, '/')) != NULL)
+ *slash = '\0';
+ if (get_u32(&t->tcm_handle, handle, 0)) {
+ fprintf(stderr, "Illegal \"handle\"\n");
+ return -1;
+ }
+ if (slash) {
+ if (get_u32(&mask, slash+1, 0)) {
+ fprintf(stderr, "Illegal \"handle\" mask\n");
+ return -1;
+ }
+ mask_set = 1;
+ }
+ }
+
+ if (argc == 0)
+ return 0;
+
+ tail = addattr_nest(n, 4096, TCA_OPTIONS);
+
+ if (mask_set)
+ addattr32(n, MAX_MSG, TCA_SKBHASH_MASK, mask);
+
+ while (argc > 0) {
+ if (matches(*argv, "classid") == 0 ||
+ matches(*argv, "flowid") == 0) {
+ unsigned int handle;
+
+ NEXT_ARG();
+ if (get_tc_classid(&handle, *argv)) {
+ fprintf(stderr, "Illegal \"classid\"\n");
+ return -1;
+ }
+ addattr_l(n, 4096, TCA_SKBHASH_CLASSID, &handle, 4);
+ } else if (matches(*argv, "action") == 0) {
+ NEXT_ARG();
+ if (parse_action(&argc, &argv, TCA_SKBHASH_ACT, n)) {
+ fprintf(stderr, "Illegal skbhash \"action\"\n");
+ return -1;
+ }
+ continue;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+ addattr_nest_end(n, tail);
+ return 0;
+}
+
+static int skbhash_print_opt(struct filter_util *qu, FILE *f,
+ struct rtattr *opt, __u32 handle)
+{
+ struct rtattr *tb[TCA_SKBHASH_MAX+1];
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_SKBHASH_MAX, opt);
+
+ if (handle || tb[TCA_SKBHASH_MASK]) {
+ __u32 mark = 0, mask = 0;
+
+ if (handle)
+ mark = handle;
+ if (tb[TCA_SKBHASH_MASK] &&
+ (mask = rta_getattr_u32(tb[TCA_SKBHASH_MASK])) != 0xFFFFFFFF)
+ fprintf(f, "handle 0x%x/0x%x ", mark, mask);
+ else
+ fprintf(f, "handle 0x%x ", handle);
+ }
+
+ if (tb[TCA_SKBHASH_CLASSID]) {
+ SPRINT_BUF(b1);
+ fprintf(f, "classid %s ", sprint_tc_classid(rta_getattr_u32(tb[TCA_SKBHASH_CLASSID]), b1));
+ }
+
+ if (tb[TCA_SKBHASH_ACT]) {
+ fprintf(f, "\n");
+ tc_print_action(f, tb[TCA_SKBHASH_ACT], 0);
+ }
+ return 0;
+}
+
+struct filter_util skbhash_filter_util = {
+ .id = "skbhash",
+ .parse_fopt = skbhash_parse_opt,
+ .print_fopt = skbhash_print_opt,
+};