diff options
| author | Lorenzo Colitti <lorenzo@google.com> | 2015-12-16 12:30:03 +0900 |
|---|---|---|
| committer | Lorenzo Colitti <lorenzo@google.com> | 2016-02-25 09:01:21 +0900 |
| commit | f340b7c9ecf2daeb454df421b7cc4b0ca74bc545 (patch) | |
| tree | 94e3cf522ea5d737ca6422201a29e3d806518dd5 /net | |
| parent | 6b3d21c649a8b71c44543dc5933f7aa1c2a7a390 (diff) | |
net: diag: Add the ability to destroy a socket.
This patch adds a SOCK_DESTROY operation, a destroy function
pointer to sock_diag_handler, and a diag_destroy function
pointer. It does not include any implementation code.
[backport of net-next 64be0aed59ad519d6f2160868734f7e278290ac1]
Change-Id: Ic5327ff14b39dd268083ee4c1dc2c934b2820df5
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/sock_diag.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c index 0c1d58d43f67..3963c3872c69 100644 --- a/net/core/sock_diag.c +++ b/net/core/sock_diag.c @@ -214,7 +214,7 @@ void sock_diag_unregister(const struct sock_diag_handler *hnld) } EXPORT_SYMBOL_GPL(sock_diag_unregister); -static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) +static int __sock_diag_cmd(struct sk_buff *skb, struct nlmsghdr *nlh) { int err; struct sock_diag_req *req = nlmsg_data(nlh); @@ -234,8 +234,12 @@ static int __sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) hndl = sock_diag_handlers[req->sdiag_family]; if (hndl == NULL) err = -ENOENT; - else + else if (nlh->nlmsg_type == SOCK_DIAG_BY_FAMILY) err = hndl->dump(skb, nlh); + else if (nlh->nlmsg_type == SOCK_DESTROY_BACKPORT && hndl->destroy) + err = hndl->destroy(skb, nlh); + else + err = -EOPNOTSUPP; mutex_unlock(&sock_diag_table_mutex); return err; @@ -261,7 +265,8 @@ static int sock_diag_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) return ret; case SOCK_DIAG_BY_FAMILY: - return __sock_diag_rcv_msg(skb, nlh); + case SOCK_DESTROY_BACKPORT: + return __sock_diag_cmd(skb, nlh); default: return -EINVAL; } @@ -295,6 +300,18 @@ static int sock_diag_bind(struct net *net, int group) return 0; } +int sock_diag_destroy(struct sock *sk, int err) +{ + if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) + return -EPERM; + + if (!sk->sk_prot->diag_destroy) + return -EOPNOTSUPP; + + return sk->sk_prot->diag_destroy(sk, err); +} +EXPORT_SYMBOL_GPL(sock_diag_destroy); + static int __net_init diag_net_init(struct net *net) { struct netlink_kernel_cfg cfg = { |