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Date: Wed, 21 Jul 2010 11:42:50 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: Stephen Hemminger <shemminger@...tta.com>
Cc: netdev <netdev@...r.kernel.org>, David Miller <davem@...emloft.net>
Subject: [PATCH iproute2] ip: add RTA_MARK support
Adds support for RTA_MARK rt attribute added in linux-2.6.36
$ ip route get ADDR mark 4
192.168.20.110 dev eth1 src 192.168.20.108 mark 4
cache mtu 1500 advmss 1460 hoplimit 64
$ ip route get 192.168.20.108 from ADDR iif STRING mark 256
local 192.168.20.108 from 192.168.20.110 dev lo src 192.168.20.108 mark 0x100
cache <local,src-direct> iif eth1
$ ip route list cache [ADDR] mark NUMBER
Hexadecimal output if mark >= 16
null marks are not displayed.
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
include/linux/rtnetlink.h | 1 +
ip/iproute.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 0d8ef9e..a3ccbe4 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -282,6 +282,7 @@ enum rtattr_type_t {
RTA_SESSION, /* no longer used */
RTA_MP_ALGO, /* no longer used */
RTA_TABLE,
+ RTA_MARK,
__RTA_MAX
};
diff --git a/ip/iproute.c b/ip/iproute.c
index 8252e18..cbb89c5 100644
--- a/ip/iproute.c
+++ b/ip/iproute.c
@@ -55,6 +55,7 @@ static void usage(void)
fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
+ fprintf(stderr, " [ mark NUMBER ]\n");
fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n");
fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
@@ -96,6 +97,7 @@ static struct
int tos, tosmask;
int iif, iifmask;
int oif, oifmask;
+ int mark, markmask;
int realm, realmmask;
inet_prefix rprefsrc;
inet_prefix rvia;
@@ -273,6 +275,13 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
if ((oif^filter.oif)&filter.oifmask)
return 0;
}
+ if (filter.markmask) {
+ int mark = 0;
+ if (tb[RTA_MARK])
+ mark = *(int *)RTA_DATA(tb[RTA_MARK]);
+ if ((mark ^ filter.mark) & filter.markmask)
+ return 0;
+ }
if (filter.flushb &&
r->rtm_family == AF_INET6 &&
r->rtm_dst_len == 0 &&
@@ -384,6 +393,15 @@ int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
fprintf(fp, "pervasive ");
if (r->rtm_flags & RTM_F_NOTIFY)
fprintf(fp, "notify ");
+ if (tb[RTA_MARK]) {
+ unsigned int mark = *(unsigned int*)RTA_DATA(tb[RTA_MARK]);
+ if (mark) {
+ if (mark >= 16)
+ fprintf(fp, " mark 0x%x", mark);
+ else
+ fprintf(fp, " mark %u", mark);
+ }
+ }
if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
__u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
@@ -1047,6 +1065,7 @@ static int iproute_list_or_flush(int argc, char **argv, int flush)
int do_ipv6 = preferred_family;
char *id = NULL;
char *od = NULL;
+ unsigned int mark = 0;
iproute_reset_filter();
filter.tb = RT_TABLE_MAIN;
@@ -1119,6 +1138,10 @@ static int iproute_list_or_flush(int argc, char **argv, int flush)
} else if (strcmp(*argv, "iif") == 0) {
NEXT_ARG();
id = *argv;
+ } else if (strcmp(*argv, "mark") == 0) {
+ NEXT_ARG();
+ get_unsigned(&mark, *argv, 0);
+ filter.markmask = -1;
} else if (strcmp(*argv, "via") == 0) {
NEXT_ARG();
get_prefix(&filter.rvia, *argv, do_ipv6);
@@ -1200,6 +1223,7 @@ static int iproute_list_or_flush(int argc, char **argv, int flush)
filter.oifmask = -1;
}
}
+ filter.mark = mark;
if (flush) {
int round = 0;
@@ -1289,6 +1313,7 @@ int iproute_get(int argc, char **argv)
char *odev = NULL;
int connected = 0;
int from_ok = 0;
+ unsigned int mark = 0;
memset(&req, 0, sizeof(req));
@@ -1329,6 +1354,9 @@ int iproute_get(int argc, char **argv)
} else if (matches(*argv, "iif") == 0) {
NEXT_ARG();
idev = *argv;
+ } else if (matches(*argv, "mark") == 0) {
+ NEXT_ARG();
+ get_unsigned(&mark, *argv, 0);
} else if (matches(*argv, "oif") == 0 ||
strcmp(*argv, "dev") == 0) {
NEXT_ARG();
@@ -1379,6 +1407,8 @@ int iproute_get(int argc, char **argv)
addattr32(&req.n, sizeof(req), RTA_OIF, idx);
}
}
+ if (mark)
+ addattr32(&req.n, sizeof(req), RTA_MARK, mark);
if (req.r.rtm_family == AF_UNSPEC)
req.r.rtm_family = AF_INET;
--
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