| Message ID | a01c188bcbbb0f5f53e333ed9175f938eb2736be.1675359453.git.petrm@nvidia.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | None | expand |
On 02/02/2023 19:59, Petr Machata wrote: > The following patch will add two more maximum MDB allowances to the global > one, mcast_hash_max, that exists today. In all these cases, attempts to add > MDB entries above the configured maximums through netlink, fail noisily and > obviously. Such visibility is missing when adding entries through the > control plane traffic, by IGMP or MLD packets. > > To improve visibility in those cases, add a trace point that reports the > violation, including the relevant netdevice (be it a slave or the bridge > itself), and the MDB entry parameters: > > # perf record -e bridge:br_mdb_full & > # [...] > # perf script | cut -d: -f4- > dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 0 > dev v2 af 10 src :: grp ff0e::112/00:00:00:00:00:00 vid 0 > dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 10 > dev v2 af 10 src 2001:db8:1::1 grp ff0e::1/00:00:00:00:00:00 vid 10 > dev v2 af 2 src ::ffff:192.0.2.1 grp ::ffff:239.1.1.1/00:00:00:00:00:00 vid 10 > > CC: Steven Rostedt <rostedt@goodmis.org> > CC: linux-trace-kernel@vger.kernel.org > Signed-off-by: Petr Machata <petrm@nvidia.com> > Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> > --- > > Notes: > v2: > - Report IPv4 as an IPv6-mapped address through the IPv6 buffer > as well, to save ring buffer space. > > include/trace/events/bridge.h | 58 +++++++++++++++++++++++++++++++++++ > net/core/net-traces.c | 1 + > 2 files changed, 59 insertions(+) > Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
diff --git a/include/trace/events/bridge.h b/include/trace/events/bridge.h index 6b200059c2c5..a6b3a4e409f0 100644 --- a/include/trace/events/bridge.h +++ b/include/trace/events/bridge.h @@ -122,6 +122,64 @@ TRACE_EVENT(br_fdb_update, __entry->flags) ); +TRACE_EVENT(br_mdb_full, + + TP_PROTO(const struct net_device *dev, + const struct br_ip *group), + + TP_ARGS(dev, group), + + TP_STRUCT__entry( + __string(dev, dev->name) + __field(int, af) + __field(u16, vid) + __array(__u8, src, 16) + __array(__u8, grp, 16) + __array(__u8, grpmac, ETH_ALEN) /* For af == 0. */ + ), + + TP_fast_assign( + struct in6_addr *in6; + + __assign_str(dev, dev->name); + __entry->vid = group->vid; + + if (!group->proto) { + __entry->af = 0; + + memset(__entry->src, 0, sizeof(__entry->src)); + memset(__entry->grp, 0, sizeof(__entry->grp)); + memcpy(__entry->grpmac, group->dst.mac_addr, ETH_ALEN); + } else if (group->proto == htons(ETH_P_IP)) { + __entry->af = AF_INET; + + in6 = (struct in6_addr *)__entry->src; + ipv6_addr_set_v4mapped(group->src.ip4, in6); + + in6 = (struct in6_addr *)__entry->grp; + ipv6_addr_set_v4mapped(group->dst.ip4, in6); + + memset(__entry->grpmac, 0, ETH_ALEN); + +#if IS_ENABLED(CONFIG_IPV6) + } else { + __entry->af = AF_INET6; + + in6 = (struct in6_addr *)__entry->src; + *in6 = group->src.ip6; + + in6 = (struct in6_addr *)__entry->grp; + *in6 = group->dst.ip6; + + memset(__entry->grpmac, 0, ETH_ALEN); +#endif + } + ), + + TP_printk("dev %s af %u src %pI6c grp %pI6c/%pM vid %u", + __get_str(dev), __entry->af, __entry->src, __entry->grp, + __entry->grpmac, __entry->vid) +); #endif /* _TRACE_BRIDGE_H */ diff --git a/net/core/net-traces.c b/net/core/net-traces.c index c40cd8dd75c7..c6820ad2183f 100644 --- a/net/core/net-traces.c +++ b/net/core/net-traces.c @@ -41,6 +41,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_add); EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_external_learn_add); EXPORT_TRACEPOINT_SYMBOL_GPL(fdb_delete); EXPORT_TRACEPOINT_SYMBOL_GPL(br_fdb_update); +EXPORT_TRACEPOINT_SYMBOL_GPL(br_mdb_full); #endif #if IS_ENABLED(CONFIG_PAGE_POOL)