From: Jamal Hadi Salim <j...@mojatatu.com>
Seems like my old patches didnt make it into the tree - so here goes
Sample use case:
... add ingress qdisc
sudo $TC qdisc add dev $ETH ingress
... if we exceed rate of 1kbps (burst of 90K), do an absolute jump of 2 actions
sudo $TC actions add action police rate 1kbit burst 90k conform-exceed jump 2 /
pipe
sudo $TC -s actions ls action police
---
action order 0: police 0x4 rate 1Kbit burst 23440b mtu 2Kb action jump 2/pipe
overhead 0b
ref 1 bind 0 installed 41 sec used 41 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
--
... lets add a couple of marks so we can use them to mark exceed/not exceed
sudo $TC actions add action skbedit mark 11 ok index 11
sudo $TC actions add action skbedit mark 12 ok index 12
... if we dont exceed our rate we get a mark of 11, else mark of 12
sudo $TC filter add dev $ETH parent ffff: protocol ip prio 8 u32 \
match ip dst 127.0.0.8/32 flowid 1:10 \
action police index 4 \
action skbedit index 11 \
action skbedit index 12
Ok, lets keep this thing a little busy..
sudo ping -f -c 10000 127.0.0.8
... now lets see the filters..
sudo $TC -s filter ls dev $ETH parent ffff: protocol ip
----
filter pref 8 u32 chain 0
filter pref 8 u32 chain 0 fh 800: ht divisor 1
filter pref 8 u32 chain 0 fh 800::800 order 2048 key ht 800 bkt 0 flowid 1:10
not_in_hw (rule hit 20000 success 10000)
match 7f000008/ffffffff at 16 (success 10000 )
action order 1: police 0x4 rate 1Kbit burst 23440b mtu 2Kb action jump
2/pipe overhead 0b
ref 2 bind 1 installed 198 sec used 2 sec
Action statistics:
Sent 840000 bytes 10000 pkt (dropped 0, overlimits 9721 requeues 0)
backlog 0b 0p requeues 0
action order 2: skbedit mark 11 pass
index 11 ref 2 bind 1 installed 127 sec used 2 sec
Action statistics:
Sent 23436 bytes 279 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
action order 3: skbedit mark 12 pass
index 12 ref 2 bind 1 installed 127 sec used 2 sec
Action statistics:
Sent 816564 bytes 9721 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
-----
As can be seen 97.21% of the packets were marked as exceeding the allocated
rate; you could do something clever with the skb mark after this.
Signed-off-by: Jamal Hadi Salim <j...@mojatatu.com>
---
tc/m_gact.c | 6 ++++--
tc/tc_util.c | 16 ++++++++++++++++
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/tc/m_gact.c b/tc/m_gact.c
index df143c9..38949e9 100644
--- a/tc/m_gact.c
+++ b/tc/m_gact.c
@@ -46,18 +46,20 @@ explain(void)
fprintf(stderr, "Usage: ... gact <ACTION> [RAND] [INDEX]\n");
fprintf(stderr,
"Where: \tACTION := reclassify | drop | continue | pass | pipe
|\n"
- " \t goto chain <CHAIN_INDEX>\n"
+ " \t goto chain <CHAIN_INDEX> | jump
<JUMP_COUNT>\n"
"\tRAND := random <RANDTYPE> <ACTION> <VAL>\n"
"\tRANDTYPE := netrand | determ\n"
"\tVAL : = value not exceeding 10000\n"
+ "\tJUMP_COUNT := Absolute jump from start of action
list\n"
"\tINDEX := index value used\n"
"\n");
#else
fprintf(stderr, "Usage: ... gact <ACTION> [INDEX]\n");
fprintf(stderr,
"Where: \tACTION := reclassify | drop | continue | pass | pipe
|\n"
- " \t goto chain <CHAIN_INDEX>\n"
+ " \t goto chain <CHAIN_INDEX> | jump
<JUMP_COUNT>\n"
"\tINDEX := index value used\n"
+ "\tJUMP_COUNT := Absolute jump from start of action list\n"
"\n");
#endif
}
diff --git a/tc/tc_util.c b/tc/tc_util.c
index 50d3550..b39e550 100644
--- a/tc/tc_util.c
+++ b/tc/tc_util.c
@@ -417,6 +417,8 @@ static const char *action_n2a(int action)
if (TC_ACT_EXT_CMP(action, TC_ACT_GOTO_CHAIN))
return "goto";
+ if (TC_ACT_EXT_CMP(action, TC_ACT_JUMP))
+ return "jump";
switch (action) {
case TC_ACT_UNSPEC:
return "continue";
@@ -463,6 +465,7 @@ static int action_a2n(char *arg, int *result, bool
allow_num)
{"reclassify", TC_ACT_RECLASSIFY},
{"pipe", TC_ACT_PIPE},
{"goto", TC_ACT_GOTO_CHAIN},
+ {"jump", TC_ACT_JUMP},
{"trap", TC_ACT_TRAP},
{ NULL },
}, *iter;
@@ -510,6 +513,17 @@ static int __parse_action_control(int *argc_p, char
***argv_p, int *result_p,
}
result |= chain_index;
}
+ if (result == TC_ACT_JUMP) {
+ __u32 jump_cnt = 0;
+
+ NEXT_ARG();
+ if (get_u32(&jump_cnt, *argv, 10) ||
+ jump_cnt > TC_ACT_EXT_VAL_MASK) {
+ fprintf(stderr, "Invalid \"jump count\" (%s)\n", *argv);
+ return -1;
+ }
+ result |= jump_cnt;
+ }
NEXT_ARG_FWD();
*argc_p = argc;
*argv_p = argv;
@@ -637,6 +651,8 @@ void print_action_control(FILE *f, const char *prefix,
fprintf(f, "%s%s", prefix, action_n2a(action));
if (TC_ACT_EXT_CMP(action, TC_ACT_GOTO_CHAIN))
fprintf(f, " chain %u", action & TC_ACT_EXT_VAL_MASK);
+ if (TC_ACT_EXT_CMP(action, TC_ACT_JUMP))
+ fprintf(f, " %u", action & TC_ACT_EXT_VAL_MASK);
fprintf(f, "%s", suffix);
}
--
1.9.1
