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zebra: add netlink tunnel msg to dump routine

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This patch parses vxlan vnifilter rtm tunnel
message which contains vni mapping to vxlan device.
The new notifications are RTM_NEWTUNNEL,
RTM_DELTUNNEL, and RTM_GETTUNNEL.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/
linux.git/commit/?h=v5.18-rc7&id=7b8135f4df98b155b23754b6065c157861e268f1

Testing Done:

2022/05/18 00:34:25 ZEBRA: netlink_recv_msg: << netlink message dump
[recv]
2022/05/18 00:34:25 ZEBRA: nlmsghdr [len=36 type=(120) NEWTUNNEL
flags=(0x0000) {} seq=0 pid=0]
2022/05/18 00:34:25 ZEBRA:   tnlm [family=(7) AF_BRIDGE ifindex=46
2022/05/18 00:34:25 ZEBRA:   vni_start 4001, vni_end 0

Signed-off-by: Chirag Shah <chirag@nvidia.com>
This commit is contained in:
Chirag Shah 2022-05-16 22:52:54 -07:00
parent 47e2eb270d
commit 42ed3bd77f
1 changed files with 59 additions and 0 deletions
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59
zebra/debug_nl.c
View File

@ -33,6 +33,7 @@
#include "zebra/rt_netlink.h"
#include "zebra/kernel_netlink.h"
#include "lib/vxlan.h"
const char *nlmsg_type2str(uint16_t type)
{
@ -92,6 +93,13 @@ const char *nlmsg_type2str(uint16_t type)
case RTM_GETNEXTHOP:
return "GETNEXTHOP";
case RTM_NEWTUNNEL:
return "NEWTUNNEL";
case RTM_DELTUNNEL:
return "DELTUNNEL";
case RTM_GETTUNNEL:
return "GETTUNNEL";
case RTM_NEWNETCONF:
return "RTM_NEWNETCONF";
case RTM_DELNETCONF:
@ -1235,6 +1243,44 @@ next_rta:
goto next_rta;
}
static void nltnl_dump(struct tunnel_msg *tnlm, size_t msglen)
{
struct rtattr *attr;
vni_t vni_start = 0, vni_end = 0;
struct rtattr *ttb[VXLAN_VNIFILTER_ENTRY_MAX + 1];
uint8_t rta_type;
attr = TUNNEL_RTA(tnlm);
next_attr:
/* Check the header for valid length and for outbound access. */
if (RTA_OK(attr, msglen) == 0)
return;
rta_type = attr->rta_type & NLA_TYPE_MASK;
if (rta_type != VXLAN_VNIFILTER_ENTRY) {
attr = RTA_NEXT(attr, msglen);
goto next_attr;
}
memset(ttb, 0, sizeof(ttb));
netlink_parse_rtattr_flags(ttb, VXLAN_VNIFILTER_ENTRY_MAX,
RTA_DATA(attr), RTA_PAYLOAD(attr),
NLA_F_NESTED);
if (ttb[VXLAN_VNIFILTER_ENTRY_START])
vni_start =
*(uint32_t *)RTA_DATA(ttb[VXLAN_VNIFILTER_ENTRY_START]);
if (ttb[VXLAN_VNIFILTER_ENTRY_END])
vni_end = *(uint32_t *)RTA_DATA(ttb[VXLAN_VNIFILTER_ENTRY_END]);
zlog_debug(" vni_start %u, vni_end %u", vni_start, vni_end);
attr = RTA_NEXT(attr, msglen);
goto next_attr;
}
static const char *lwt_type2str(uint16_t type)
{
switch (type) {
@ -1523,6 +1569,7 @@ void nl_dump(void *msg, size_t msglen)
struct nhmsg *nhm;
struct netconfmsg *ncm;
struct ifinfomsg *ifi;
struct tunnel_msg *tnlm;
struct fib_rule_hdr *frh;
char fbuf[128];
char ibuf[128];
@ -1639,6 +1686,18 @@ next_header:
nlnh_dump(nhm, nlmsg->nlmsg_len - NLMSG_LENGTH(sizeof(*nhm)));
break;
case RTM_NEWTUNNEL:
case RTM_DELTUNNEL:
case RTM_GETTUNNEL:
tnlm = NLMSG_DATA(nlmsg);
zlog_debug(" tnlm [family=(%d) %s ifindex=%d ", tnlm->family,
af_type2str(tnlm->family), tnlm->ifindex);
nltnl_dump(tnlm,
nlmsg->nlmsg_len -
NLMSG_LENGTH(sizeof(struct tunnel_msg)));
break;
case RTM_NEWNETCONF:
case RTM_DELNETCONF:
ncm = NLMSG_DATA(nlmsg);