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iproute2: fix the link group name getting error 

In the situation where more than one entry live in the same hash bucket,
loop to get the correct one.

Before:
$ cat /etc/iproute2/group
0	default
256     test

$ sudo ip link set group test dummy1

$ ip link show type dummy
11: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group 0 qlen 1000
    link/ether 4e:3b:d3:6c:f0:e6 brd ff:ff:ff:ff:ff:ff
12: dummy1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group test qlen 1000
    link/ether d6:9c:a4:1f:e7:e5 brd ff:ff:ff:ff:ff:ff

After:
$ ip link show type dummy
11: dummy0: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 4e:3b:d3:6c:f0:e6 brd ff:ff:ff:ff:ff:ff
12: dummy1: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN mode DEFAULT group test qlen 1000
    link/ether d6:9c:a4:1f:e7:e5 brd ff:ff:ff:ff:ff:ff

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
This commit is contained in:
Zhang Shengju 2016-11-18 09:12:53 +08:00 committed by Stephen Hemminger
parent ba7b97776e
commit 2d98dd4821
1 changed files with 6 additions and 2 deletions
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8
lib/rt_names.c
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@ -559,8 +559,12 @@ const char *rtnl_group_n2a(int id, char *buf, int len)
for (i = 0; i < 256; i++) {
entry = rtnl_group_hash[i];
if (entry && entry->id == id)
return entry->name;
while (entry) {
if (entry->id == id)
return entry->name;
entry = entry->next;
}
}
snprintf(buf, len, "%d", id);