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tc_filter: add support for chain index 

Allow user to put filter to a specific chain identified by index.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
This commit is contained in:
Jiri Pirko 2017-05-16 19:29:35 +02:00 committed by Stephen Hemminger
parent cda81a4ea5
commit 732f03461b
1 changed files with 72 additions and 15 deletions
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87
tc/tc_filter.c
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@ -31,7 +31,7 @@ static void usage(void)
fprintf(stderr,
"Usage: tc filter [ add | del | change | replace | show ] dev STRING\n"
"Usage: tc filter get dev STRING parent CLASSID protocol PROTO handle FILTERID pref PRIO FILTER_TYPE\n"
" [ pref PRIO ] protocol PROTO\n"
" [ pref PRIO ] protocol PROTO [ chain CHAIN_INDEX ]\n"
" [ estimator INTERVAL TIME_CONSTANT ]\n"
" [ root | ingress | egress | parent CLASSID ]\n"
" [ handle FILTERID ] [ [ FILTER_TYPE ] [ help | OPTIONS ] ]\n"
@ -59,6 +59,8 @@ static int tc_filter_modify(int cmd, unsigned int flags, int argc, char **argv)
__u32 prio = 0;
__u32 protocol = 0;
int protocol_set = 0;
__u32 chain_index;
int chain_index_set = 0;
char *fhandle = NULL;
char d[16] = {};
char k[16] = {};
@ -127,6 +129,13 @@ static int tc_filter_modify(int cmd, unsigned int flags, int argc, char **argv)
invarg("invalid protocol", *argv);
protocol = id;
protocol_set = 1;
} else if (matches(*argv, "chain") == 0) {
NEXT_ARG();
if (chain_index_set)
duparg("chain", *argv);
if (get_u32(&chain_index, *argv, 0))
invarg("invalid chain index value", *argv);
chain_index_set = 1;
} else if (matches(*argv, "estimator") == 0) {
if (parse_estimator(&argc, &argv, &est) < 0)
return -1;
@ -146,6 +155,9 @@ static int tc_filter_modify(int cmd, unsigned int flags, int argc, char **argv)
req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);
if (chain_index_set)
addattr32(&req.n, sizeof(req), TCA_CHAIN, chain_index);
if (k[0])
addattr_l(&req.n, sizeof(req), TCA_KIND, k, strlen(k)+1);
@ -167,6 +179,7 @@ static int tc_filter_modify(int cmd, unsigned int flags, int argc, char **argv)
return -1;
}
}
if (est.ewma_log)
addattr_l(&req.n, sizeof(req), TCA_RATE, &est, sizeof(est));
@ -193,6 +206,8 @@ static __u32 filter_parent;
static int filter_ifindex;
static __u32 filter_prio;
static __u32 filter_protocol;
static __u32 filter_chain_index;
static int filter_chain_index_set;
__u16 f_proto;
int print_filter(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
@ -270,6 +285,15 @@ int print_filter(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
}
}
fprintf(fp, "%s ", rta_getattr_str(tb[TCA_KIND]));
if (tb[TCA_CHAIN]) {
__u32 chain_index = rta_getattr_u32(tb[TCA_CHAIN]);
if (!filter_chain_index_set ||
filter_chain_index != chain_index)
fprintf(fp, "chain %u ", chain_index);
}
q = get_filter_kind(RTA_DATA(tb[TCA_KIND]));
if (tb[TCA_OPTIONS]) {
if (q)
@ -311,6 +335,8 @@ static int tc_filter_get(int cmd, unsigned int flags, int argc, char **argv)
__u32 prio = 0;
__u32 protocol = 0;
int protocol_set = 0;
__u32 chain_index;
int chain_index_set = 0;
__u32 parent_handle = 0;
char *fhandle = NULL;
char d[16] = {};
@ -375,6 +401,13 @@ static int tc_filter_get(int cmd, unsigned int flags, int argc, char **argv)
invarg("invalid protocol", *argv);
protocol = id;
protocol_set = 1;
} else if (matches(*argv, "chain") == 0) {
NEXT_ARG();
if (chain_index_set)
duparg("chain", *argv);
if (get_u32(&chain_index, *argv, 0))
invarg("invalid chain index value", *argv);
chain_index_set = 1;
} else if (matches(*argv, "help") == 0) {
usage();
return 0;
@ -401,6 +434,9 @@ static int tc_filter_get(int cmd, unsigned int flags, int argc, char **argv)
req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);
if (chain_index_set)
addattr32(&req.n, sizeof(req), TCA_CHAIN, chain_index);
if (req.t.tcm_parent == TC_H_UNSPEC) {
fprintf(stderr, "Must specify filter parent\n");
return -1;
@ -457,10 +493,20 @@ static int tc_filter_get(int cmd, unsigned int flags, int argc, char **argv)
static int tc_filter_list(int argc, char **argv)
{
struct tcmsg t = { .tcm_family = AF_UNSPEC };
struct {
struct nlmsghdr n;
struct tcmsg t;
char buf[MAX_MSG];
} req = {
.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct tcmsg)),
.n.nlmsg_type = RTM_GETTFILTER,
.t.tcm_parent = TC_H_UNSPEC,
.t.tcm_family = AF_UNSPEC,
};
char d[16] = {};
__u32 prio = 0;
__u32 protocol = 0;
__u32 chain_index;
char *fhandle = NULL;
while (argc > 0) {
@ -470,39 +516,39 @@ static int tc_filter_list(int argc, char **argv)
duparg("dev", *argv);
strncpy(d, *argv, sizeof(d)-1);
} else if (strcmp(*argv, "root") == 0) {
if (t.tcm_parent) {
if (req.t.tcm_parent) {
fprintf(stderr,
"Error: \"root\" is duplicate parent ID\n");
return -1;
}
filter_parent = t.tcm_parent = TC_H_ROOT;
filter_parent = req.t.tcm_parent = TC_H_ROOT;
} else if (strcmp(*argv, "ingress") == 0) {
if (t.tcm_parent) {
if (req.t.tcm_parent) {
fprintf(stderr,
"Error: \"ingress\" is duplicate parent ID\n");
return -1;
}
filter_parent = TC_H_MAKE(TC_H_CLSACT,
TC_H_MIN_INGRESS);
t.tcm_parent = filter_parent;
req.t.tcm_parent = filter_parent;
} else if (strcmp(*argv, "egress") == 0) {
if (t.tcm_parent) {
if (req.t.tcm_parent) {
fprintf(stderr,
"Error: \"egress\" is duplicate parent ID\n");
return -1;
}
filter_parent = TC_H_MAKE(TC_H_CLSACT,
TC_H_MIN_EGRESS);
t.tcm_parent = filter_parent;
req.t.tcm_parent = filter_parent;
} else if (strcmp(*argv, "parent") == 0) {
__u32 handle;
NEXT_ARG();
if (t.tcm_parent)
if (req.t.tcm_parent)
duparg("parent", *argv);
if (get_tc_classid(&handle, *argv))
invarg("invalid parent ID", *argv);
filter_parent = t.tcm_parent = handle;
filter_parent = req.t.tcm_parent = handle;
} else if (strcmp(*argv, "handle") == 0) {
NEXT_ARG();
if (fhandle)
@ -526,6 +572,14 @@ static int tc_filter_list(int argc, char **argv)
invarg("invalid protocol", *argv);
protocol = res;
filter_protocol = protocol;
} else if (matches(*argv, "chain") == 0) {
NEXT_ARG();
if (filter_chain_index_set)
duparg("chain", *argv);
if (get_u32(&chain_index, *argv, 0))
invarg("invalid chain index value", *argv);
filter_chain_index_set = 1;
filter_chain_index = chain_index;
} else if (matches(*argv, "help") == 0) {
usage();
} else {
@ -538,20 +592,23 @@ static int tc_filter_list(int argc, char **argv)
argc--; argv++;
}
t.tcm_info = TC_H_MAKE(prio<<16, protocol);
req.t.tcm_info = TC_H_MAKE(prio<<16, protocol);
ll_init_map(&rth);
if (d[0]) {
t.tcm_ifindex = ll_name_to_index(d);
if (t.tcm_ifindex == 0) {
req.t.tcm_ifindex = ll_name_to_index(d);
if (req.t.tcm_ifindex == 0) {
fprintf(stderr, "Cannot find device \"%s\"\n", d);
return 1;
}
filter_ifindex = t.tcm_ifindex;
filter_ifindex = req.t.tcm_ifindex;
}
if (rtnl_dump_request(&rth, RTM_GETTFILTER, &t, sizeof(t)) < 0) {
if (filter_chain_index_set)
addattr32(&req.n, sizeof(req), TCA_CHAIN, chain_index);
if (rtnl_dump_request_n(&rth, &req.n) < 0) {
perror("Cannot send dump request");
return 1;
}