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flower: Represent HW traffic classes as classid values 

This patch was previously submitted as RFC. Submitting this as
non-RFC now that the classid reservation scheme for hardware
traffic classes and offloads to route packets to a hardware
traffic class are accepted in net-next.

HW traffic classes 0 through 15 are represented using the
reserved classid values :ffe0 - :ffef.

Example:
Match Dst IPv4,Dst Port and route to TC1:
# tc filter add dev eth0 protocol ip parent ffff:\
  prio 1 flower dst_ip 192.168.1.1/32\
  ip_proto udp dst_port 12000 skip_sw\
  hw_tc 1

# tc filter show dev eth0 parent ffff:
filter pref 1 flower chain 0
filter pref 1 flower chain 0 handle 0x1 hw_tc 1
  eth_type ipv4
  ip_proto udp
  dst_ip 192.168.1.1
  dst_port 12000
  skip_sw
  in_hw

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
This commit is contained in:
Amritha Nambiar 2017-11-03 01:54:01 -07:00 committed by Stephen Hemminger
parent ba914908eb
commit 0d575c4dac
1 changed files with 29 additions and 4 deletions
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33
tc/f_flower.c
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@ -619,6 +619,25 @@ static int flower_parse_opt(struct filter_util *qu, char *handle,
return -1;
}
addattr_l(n, MAX_MSG, TCA_FLOWER_CLASSID, &handle, 4);
} else if (matches(*argv, "hw_tc") == 0) {
unsigned int handle;
__u32 tc;
char *end;
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;
}
handle = TC_H_MAKE(TC_H_MAJ(t->tcm_parent),
TC_H_MIN(tc + TC_H_MIN_PRIORITY));
addattr_l(n, MAX_MSG, TCA_FLOWER_CLASSID, &handle,
sizeof(handle));
} else if (matches(*argv, "ip_flags") == 0) {
NEXT_ARG();
ret = flower_parse_matching_flags(*argv,
@ -1273,10 +1292,16 @@ static int flower_print_opt(struct filter_util *qu, FILE *f,
fprintf(f, "handle 0x%x ", handle);
if (tb[TCA_FLOWER_CLASSID]) {
SPRINT_BUF(b1);
fprintf(f, "classid %s ",
sprint_tc_classid(rta_getattr_u32(tb[TCA_FLOWER_CLASSID]),
b1));
__u32 h = rta_getattr_u32(tb[TCA_FLOWER_CLASSID]);
if (TC_H_MIN(h) < TC_H_MIN_PRIORITY ||
TC_H_MIN(h) > (TC_H_MIN_PRIORITY + TC_QOPT_MAX_QUEUE - 1)) {
SPRINT_BUF(b1);
fprintf(f, "classid %s ", sprint_tc_classid(h, b1));
} else {
fprintf(f, "hw_tc %u ",
TC_H_MIN(h) - TC_H_MIN_PRIORITY);
}
}
if (tb[TCA_FLOWER_INDEV]) {