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authorLorenzo Colitti <lorenzo@google.com>2015-12-16 12:30:04 +0900
committerDavid S. Miller <davem@davemloft.net>2015-12-15 23:26:51 -0500
commit6eb5d2e08f071c05ecbe135369c9ad418826cab2 (patch)
tree90fd2b057e3d8abc29a694a9190bcb9765310afc /net/ipv4
parentnet: diag: Add the ability to destroy a socket. (diff)
downloadlinux-dev-6eb5d2e08f071c05ecbe135369c9ad418826cab2.tar.xz
linux-dev-6eb5d2e08f071c05ecbe135369c9ad418826cab2.zip
net: diag: Support SOCK_DESTROY for inet sockets.
This passes the SOCK_DESTROY operation to the underlying protocol diag handler, or returns -EOPNOTSUPP if that handler does not define a destroy operation. Most of this patch is just renaming functions. This is not strictly necessary, but it would be fairly counterintuitive to have the code to destroy inet sockets be in a function whose name starts with inet_diag_get. 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/ipv4')
-rw-r--r--net/ipv4/inet_diag.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index cfabb8f8f0a0..8bb8e7ad8548 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -426,7 +426,7 @@ out:
}
EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
-static int inet_diag_get_exact(struct sk_buff *in_skb,
+static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
const struct inet_diag_req_v2 *req)
{
@@ -436,8 +436,12 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
handler = inet_diag_lock_handler(req->sdiag_protocol);
if (IS_ERR(handler))
err = PTR_ERR(handler);
- else
+ else if (cmd == SOCK_DIAG_BY_FAMILY)
err = handler->dump_one(in_skb, nlh, req);
+ else if (cmd == SOCK_DESTROY && handler->destroy)
+ err = handler->destroy(in_skb, req);
+ else
+ err = -EOPNOTSUPP;
inet_diag_unlock_handler(handler);
return err;
@@ -950,7 +954,7 @@ static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
req.idiag_states = rc->idiag_states;
req.id = rc->id;
- return inet_diag_get_exact(in_skb, nlh, &req);
+ return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
}
static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
@@ -984,7 +988,7 @@ static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
return inet_diag_get_exact_compat(skb, nlh);
}
-static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
+static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
{
int hdrlen = sizeof(struct inet_diag_req_v2);
struct net *net = sock_net(skb->sk);
@@ -992,7 +996,8 @@ static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
if (nlmsg_len(h) < hdrlen)
return -EINVAL;
- if (h->nlmsg_flags & NLM_F_DUMP) {
+ if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
+ h->nlmsg_flags & NLM_F_DUMP) {
if (nlmsg_attrlen(h, hdrlen)) {
struct nlattr *attr;
@@ -1011,7 +1016,7 @@ static int inet_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
}
}
- return inet_diag_get_exact(skb, h, nlmsg_data(h));
+ return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
}
static
@@ -1062,14 +1067,16 @@ int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
static const struct sock_diag_handler inet_diag_handler = {
.family = AF_INET,
- .dump = inet_diag_handler_dump,
+ .dump = inet_diag_handler_cmd,
.get_info = inet_diag_handler_get_info,
+ .destroy = inet_diag_handler_cmd,
};
static const struct sock_diag_handler inet6_diag_handler = {
.family = AF_INET6,
- .dump = inet_diag_handler_dump,
+ .dump = inet_diag_handler_cmd,
.get_info = inet_diag_handler_get_info,
+ .destroy = inet_diag_handler_cmd,
};
int inet_diag_register(const struct inet_diag_handler *h)