The Mirred/redirect action is extended to accept a traffic
class on the device in addition to the device's ifindex.
Usage: mirred <DIRECTION> <ACTION> <dev DEVICENAME> <tclass TC_INDEX>
Example:
# tc qdisc add dev eth0 ingress
# tc filter add dev eth0 protocol ip parent ffff: prio 1 flower\
dst_ip 192.168.1.1/32 ip_proto udp dst_port 22\
skip_sw action mirred ingress redirect dev eth0 tclass 1
v2: Renamed the parameter 'tc' to 'tclass'. Replaced atoi with
strtoul and used NEXT_ARG() construct.
Signed-off-by: Amritha Nambiar <amritha.namb...@intel.com>
---
include/linux/tc_act/tc_mirred.h | 3 +++
tc/m_mirred.c | 35 +++++++++++++++++++++++++++++++----
2 files changed, 34 insertions(+), 4 deletions(-)
diff --git a/include/linux/tc_act/tc_mirred.h b/include/linux/tc_act/tc_mirred.h
index 3d7a2b3..ea06a47 100644
--- a/include/linux/tc_act/tc_mirred.h
+++ b/include/linux/tc_act/tc_mirred.h
@@ -9,6 +9,8 @@
#define TCA_EGRESS_MIRROR 2 /* mirror packet to EGRESS */
#define TCA_INGRESS_REDIR 3 /* packet redirect to INGRESS*/
#define TCA_INGRESS_MIRROR 4 /* mirror packet to INGRESS */
+
+#define MIRRED_F_TCLASS 0x1
struct tc_mirred {
tc_gen;
@@ -21,6 +23,7 @@ enum {
TCA_MIRRED_TM,
TCA_MIRRED_PARMS,
TCA_MIRRED_PAD,
+ TCA_MIRRED_TCLASS,
__TCA_MIRRED_MAX
};
#define TCA_MIRRED_MAX (__TCA_MIRRED_MAX - 1)
diff --git a/tc/m_mirred.c b/tc/m_mirred.c
index 2384bda..1cb477a 100644
--- a/tc/m_mirred.c
+++ b/tc/m_mirred.c
@@ -29,12 +29,13 @@
static void
explain(void)
{
- fprintf(stderr, "Usage: mirred <DIRECTION> <ACTION> [index INDEX] <dev
DEVICENAME>\n");
+ fprintf(stderr, "Usage: mirred <DIRECTION> <ACTION> [index INDEX] <dev
DEVICENAME> [tclass TCINDEX]\n");
fprintf(stderr, "where:\n");
fprintf(stderr, "\tDIRECTION := <ingress | egress>\n");
fprintf(stderr, "\tACTION := <mirror | redirect>\n");
fprintf(stderr, "\tINDEX is the specific policy instance id\n");
fprintf(stderr, "\tDEVICENAME is the devicename\n");
+ fprintf(stderr, "\tTCINDEX is the traffic class index\n");
}
@@ -72,6 +73,9 @@ parse_direction(struct action_util *a, int *argc_p, char
***argv_p,
struct tc_mirred p = {};
struct rtattr *tail;
char d[16] = {};
+ __u32 flags = 0;
+ char *end;
+ __u8 tc;
while (argc > 0) {
@@ -139,9 +143,23 @@ parse_direction(struct action_util *a, int *argc_p, char
***argv_p,
duparg("dev", *argv);
strncpy(d, *argv, sizeof(d)-1);
- argc--;
- argv++;
-
+ NEXT_ARG_FWD();
+
+ if (argc > 0 && matches(*argv, "tclass") == 0) {
+ NEXT_ARG();
+ tc = strtoul(*argv, &end, 0);
+ if (*end) {
+ fprintf(stderr, "Illegal TC
index\n");
+ return -1;
+ }
+ if (tc >= TC_QOPT_MAX_QUEUE) {
+ fprintf(stderr, "TC index
exceeds max range\n");
+ return -1;
+ }
+ flags |= MIRRED_F_TCLASS;
+ ok++;
+ NEXT_ARG_FWD();
+ }
break;
}
@@ -193,6 +211,9 @@ parse_direction(struct action_util *a, int *argc_p, char
***argv_p,
tail = NLMSG_TAIL(n);
addattr_l(n, MAX_MSG, tca_id, NULL, 0);
addattr_l(n, MAX_MSG, TCA_MIRRED_PARMS, &p, sizeof(p));
+ if (flags & MIRRED_F_TCLASS)
+ addattr_l(n, MAX_MSG, TCA_MIRRED_TCLASS,
+ &tc, sizeof(tc));
tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
*argc_p = argc;
@@ -248,6 +269,7 @@ print_mirred(struct action_util *au, FILE * f, struct
rtattr *arg)
struct tc_mirred *p;
struct rtattr *tb[TCA_MIRRED_MAX + 1];
const char *dev;
+ __u8 *tc;
if (arg == NULL)
return -1;
@@ -273,6 +295,11 @@ print_mirred(struct action_util *au, FILE * f, struct
rtattr *arg)
fprintf(f, "mirred (%s to device %s)", mirred_n2a(p->eaction), dev);
print_action_control(f, " ", p->action, "");
+ if (tb[TCA_MIRRED_TCLASS]) {
+ tc = RTA_DATA(tb[TCA_MIRRED_TCLASS]);
+ fprintf(f, " tclass %u", *tc);
+ }
+
fprintf(f, "\n ");
fprintf(f, "\tindex %u ref %d bind %d", p->index, p->refcnt,
p->bindcnt);
