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net: inet: diag: expose sockets cgroup classid

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This is useful for directly looking up a task based on class id rather than
having to scan through all open file descriptors.

Signed-off-by: Sasha Levin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Levin, Alexander (Sasha Levin) authored and David S. Miller committed 2017-08-18 16:10:50 -07:00
1 parent f21e507701
commit 0888e372c3
2 files changed
+12
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include/uapi/linux/inet_diag.h
+1
View File
@@ -142,6 +142,7 @@ enum {
INET_DIAG_PAD,
INET_DIAG_MARK,
INET_DIAG_BBRINFO,
INET_DIAG_CLASS_ID,
__INET_DIAG_MAX,
};
net/ipv4/inet_diag.c
+11
View File
@@ -274,6 +274,17 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
goto errout;
}
if (ext & (1 << (INET_DIAG_CLASS_ID - 1))) {
u32 classid = 0;
#ifdef CONFIG_SOCK_CGROUP_DATA
classid = sock_cgroup_classid(&sk->sk_cgrp_data);
#endif
if (nla_put_u32(skb, INET_DIAG_CLASS_ID, classid))
goto errout;
}
out:
nlmsg_end(skb, nlh);
return 0;