| From: xu xin <cgel.zte@gmail.com> |
| Subject: kernel/taskstats.c: make taskstats available via genetlink per namespace |
| |
| Currently, the application getdelays cannot get taskstats in a net |
| namespace. The returned error is just like the following: |
| |
| -sh-4.4# ps -ef | tail -5 |
| root 186 2 0 09:23 ? 00:00:00 [kworker/2:1H] |
| root 187 2 0 09:23 ? 00:00:00 [kworker/0:2-eve] |
| root 190 183 0 09:23 ? 00:00:00 -sh |
| root 198 190 0 09:25 ? 00:00:00 ps -ef |
| root 199 190 0 09:25 ? 00:00:00 tail -5 |
| -sh-4.4# |
| -sh-4.4# ./getdelays -d -p 186 -v |
| print delayacct stats ON |
| debug on |
| Error getting family id, errno 0 |
| |
| As more and more applications are deployed in containers like Docker, it |
| is necessary to support getdelays to be used in net namespace. Taskstats |
| is safe for use per namespace as genetlink checks the capability of |
| namespace message by netlink_ns_capable(). |
| |
| Make taskstats available via genetlink per namespace. |
| |
| Link: https://lkml.kernel.org/r/20220221032202.1925507-1-xu.xin16@zte.com.cn |
| Signed-off-by: xu xin <xu.xin16@zte.com.cn> |
| Reported-by: Changcheng Deng <deng.changcheng@zte.com.cn> |
| Cc: Balbir Singh <bsingharora@gmail.com> |
| Cc: "Eric W. Biederman" <ebiederm@xmission.com> |
| Cc: David Miller <davem@davemloft.net> |
| Cc: Eric Dumazet <edumazet@google.com> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| kernel/taskstats.c | 1 + |
| 1 file changed, 1 insertion(+) |
| |
| --- a/kernel/taskstats.c~kernel-make-taskstats-available-via-genetlink-per-namespace |
| +++ a/kernel/taskstats.c |
| @@ -664,6 +664,7 @@ static struct genl_family family __ro_af |
| .module = THIS_MODULE, |
| .ops = taskstats_ops, |
| .n_ops = ARRAY_SIZE(taskstats_ops), |
| + .netnsok = true, |
| }; |
| |
| /* Needed early in initialization */ |
| _ |
