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bridge: mdb: print source list when available

Browse Source 
Print the mdb entry's source list when it's available if the user
requested to show details (-d). Each source has an associated timer
which controls if traffic should be forwarded to that S,G entry (if the
timer is non-zero traffic is forwarded, otherwise it's not).
Currently the source list is kernel controlled and can't be changed by
user-space.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Nikolay Aleksandrov 2020-10-08 16:50:23 +03:00 committed by David Ahern
parent 1d28c48046
commit 2de81d1eff
1 changed files with 61 additions and 12 deletions
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65
bridge/mdb.c
View File

@ -41,15 +41,20 @@ static bool is_temp_mcast_rtr(__u8 type)
return type == MDB_RTR_TYPE_TEMP_QUERY || type == MDB_RTR_TYPE_TEMP;
}
static const char *format_timer(__u32 ticks)
static const char *format_timer(__u32 ticks, int align)
{
struct timeval tv;
static char tbuf[32];
__jiffies_to_tv(&tv, ticks);
if (align)
snprintf(tbuf, sizeof(tbuf), "%4lu.%.2lu",
(unsigned long)tv.tv_sec,
(unsigned long)tv.tv_usec / 10000);
else
snprintf(tbuf, sizeof(tbuf), "%lu.%.2lu",
(unsigned long)tv.tv_sec,
(unsigned long)tv.tv_usec / 10000);
return tbuf;
}
@ -65,7 +70,7 @@ static void __print_router_port_stats(FILE *f, struct rtattr *pattr)
__u32 timer = rta_getattr_u32(tb[MDBA_ROUTER_PATTR_TIMER]);
print_string(PRINT_ANY, "timer", " %s",
format_timer(timer));
format_timer(timer, 1));
}
if (tb[MDBA_ROUTER_PATTR_TYPE]) {
@ -115,6 +120,31 @@ static void br_print_router_ports(FILE *f, struct rtattr *attr,
close_json_array(PRINT_JSON, NULL);
}
static void print_src_entry(struct rtattr *src_attr, int af, const char *sep)
{
struct rtattr *stb[MDBA_MDB_SRCATTR_MAX + 1];
SPRINT_BUF(abuf);
const char *addr;
__u32 timer_val;
parse_rtattr_nested(stb, MDBA_MDB_SRCATTR_MAX, src_attr);
if (!stb[MDBA_MDB_SRCATTR_ADDRESS] || !stb[MDBA_MDB_SRCATTR_TIMER])
return;
addr = inet_ntop(af, RTA_DATA(stb[MDBA_MDB_SRCATTR_ADDRESS]), abuf,
sizeof(abuf));
if (!addr)
return;
timer_val = rta_getattr_u32(stb[MDBA_MDB_SRCATTR_TIMER]);
open_json_object(NULL);
print_string(PRINT_FP, NULL, "%s", sep);
print_color_string(PRINT_ANY, ifa_family_color(af),
"address", "%s", addr);
print_string(PRINT_ANY, "timer", "/%s", format_timer(timer_val, 0));
close_json_object();
}
static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e,
struct nlmsghdr *n, struct rtattr **tb)
{
@ -149,12 +179,30 @@ static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e,
}
print_string(PRINT_ANY, "state", " %s",
(e->state & MDB_PERMANENT) ? "permanent" : "temp");
if (show_details && tb && tb[MDBA_MDB_EATTR_GROUP_MODE]) {
if (show_details && tb) {
if (tb[MDBA_MDB_EATTR_GROUP_MODE]) {
__u8 mode = rta_getattr_u8(tb[MDBA_MDB_EATTR_GROUP_MODE]);
print_string(PRINT_ANY, "filter_mode", " filter_mode %s",
mode == MCAST_INCLUDE ? "include" : "exclude");
mode == MCAST_INCLUDE ? "include" :
"exclude");
}
if (tb[MDBA_MDB_EATTR_SRC_LIST]) {
struct rtattr *i, *attr = tb[MDBA_MDB_EATTR_SRC_LIST];
const char *sep = " ";
int rem;
open_json_array(PRINT_ANY, is_json_context() ?
"source_list" :
" source_list");
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem);
i = RTA_NEXT(i, rem)) {
print_src_entry(i, af, sep);
sep = ",";
}
close_json_array(PRINT_JSON, NULL);
}
}
open_json_array(PRINT_JSON, "flags");
@ -175,7 +223,7 @@ static void print_mdb_entry(FILE *f, int ifindex, const struct br_mdb_entry *e,
__u32 timer = rta_getattr_u32(tb[MDBA_MDB_EATTR_TIMER]);
print_string(PRINT_ANY, "timer", " %s",
format_timer(timer));
format_timer(timer, 1));
}
print_nl();
@ -193,8 +241,9 @@ static void br_print_mdb_entry(FILE *f, int ifindex, struct rtattr *attr,
rem = RTA_PAYLOAD(attr);
for (i = RTA_DATA(attr); RTA_OK(i, rem); i = RTA_NEXT(i, rem)) {
e = RTA_DATA(i);
parse_rtattr(etb, MDBA_MDB_EATTR_MAX, MDB_RTA(RTA_DATA(i)),
RTA_PAYLOAD(i) - RTA_ALIGN(sizeof(*e)));
parse_rtattr_flags(etb, MDBA_MDB_EATTR_MAX, MDB_RTA(RTA_DATA(i)),
RTA_PAYLOAD(i) - RTA_ALIGN(sizeof(*e)),
NLA_F_NESTED);
print_mdb_entry(f, ifindex, e, n, etb);
}
}