* this, _but_ remember, it adds useless work on UP machines.
*/
-static void netlink_table_grab(void)
+void netlink_table_grab(void)
__acquires(nl_table_lock)
{
+ might_sleep();
+
write_lock_irq(&nl_table_lock);
if (atomic_read(&nl_table_users)) {
}
}
-static void netlink_table_ungrab(void)
+void netlink_table_ungrab(void)
__releases(nl_table_lock)
{
write_unlock_irq(&nl_table_lock);
return 0;
}
-static int netlink_create(struct net *net, struct socket *sock, int protocol)
+static int netlink_create(struct net *net, struct socket *sock, int protocol,
+ int kern)
{
struct module *module = NULL;
struct mutex *cb_mutex;
if (nl_table[protocol].registered &&
try_module_get(nl_table[protocol].module))
module = nl_table[protocol].module;
+ else
+ err = -EPROTONOSUPPORT;
cb_mutex = nl_table[protocol].cb_mutex;
netlink_unlock_table();
+ if (err < 0)
+ goto out;
+
err = __netlink_create(net, sock, cb_mutex, protocol);
if (err < 0)
goto out_module;
skb_queue_purge(&sk->sk_write_queue);
- if (nlk->pid && !nlk->subscriptions) {
+ if (nlk->pid) {
struct netlink_notify n = {
.net = sock_net(sk),
.protocol = sk->sk_protocol,
{
struct sock *sk = sock->sk;
struct netlink_sock *nlk = nlk_sk(sk);
- struct sockaddr_nl *nladdr = (struct sockaddr_nl *)addr;
+ DECLARE_SOCKADDR(struct sockaddr_nl *, nladdr, addr);
nladdr->nl_family = AF_NETLINK;
nladdr->nl_pad = 0;
struct netlink_set_err_data *p)
{
struct netlink_sock *nlk = nlk_sk(sk);
+ int ret = 0;
if (sk == p->exclude_sk)
goto out;
- if (sock_net(sk) != sock_net(p->exclude_sk))
+ if (!net_eq(sock_net(sk), sock_net(p->exclude_sk)))
goto out;
if (nlk->pid == p->pid || p->group - 1 >= nlk->ngroups ||
!test_bit(p->group - 1, nlk->groups))
goto out;
+ if (p->code == ENOBUFS && nlk->flags & NETLINK_RECV_NO_ENOBUFS) {
+ ret = 1;
+ goto out;
+ }
+
sk->sk_err = p->code;
sk->sk_error_report(sk);
out:
- return 0;
+ return ret;
}
/**
* @pid: the PID of a process that we want to skip (if any)
* @groups: the broadcast group that will notice the error
* @code: error code, must be negative (as usual in kernelspace)
+ *
+ * This function returns the number of broadcast listeners that have set the
+ * NETLINK_RECV_NO_ENOBUFS socket option.
*/
-void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
+int netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
{
struct netlink_set_err_data info;
struct hlist_node *node;
struct sock *sk;
+ int ret = 0;
info.exclude_sk = ssk;
info.pid = pid;
read_lock(&nl_table_lock);
sk_for_each_bound(sk, node, &nl_table[ssk->sk_protocol].mc_list)
- do_one_set_err(sk, &info);
+ ret += do_one_set_err(sk, &info);
read_unlock(&nl_table_lock);
+ return ret;
}
EXPORT_SYMBOL(netlink_set_err);
}
static int netlink_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct netlink_sock *nlk = nlk_sk(sk);
kfree(lrh->ptr);
}
-/**
- * netlink_change_ngroups - change number of multicast groups
- *
- * This changes the number of multicast groups that are available
- * on a certain netlink family. Note that it is not possible to
- * change the number of groups to below 32. Also note that it does
- * not implicitly call netlink_clear_multicast_users() when the
- * number of groups is reduced.
- *
- * @sk: The kernel netlink socket, as returned by netlink_kernel_create().
- * @groups: The new number of groups.
- */
-int netlink_change_ngroups(struct sock *sk, unsigned int groups)
+int __netlink_change_ngroups(struct sock *sk, unsigned int groups)
{
unsigned long *listeners, *old = NULL;
struct listeners_rcu_head *old_rcu_head;
struct netlink_table *tbl = &nl_table[sk->sk_protocol];
- int err = 0;
if (groups < 32)
groups = 32;
- netlink_table_grab();
if (NLGRPSZ(tbl->groups) < NLGRPSZ(groups)) {
listeners = kzalloc(NLGRPSZ(groups) +
sizeof(struct listeners_rcu_head),
GFP_ATOMIC);
- if (!listeners) {
- err = -ENOMEM;
- goto out_ungrab;
- }
+ if (!listeners)
+ return -ENOMEM;
old = tbl->listeners;
memcpy(listeners, old, NLGRPSZ(tbl->groups));
rcu_assign_pointer(tbl->listeners, listeners);
}
tbl->groups = groups;
- out_ungrab:
+ return 0;
+}
+
+/**
+ * netlink_change_ngroups - change number of multicast groups
+ *
+ * This changes the number of multicast groups that are available
+ * on a certain netlink family. Note that it is not possible to
+ * change the number of groups to below 32. Also note that it does
+ * not implicitly call netlink_clear_multicast_users() when the
+ * number of groups is reduced.
+ *
+ * @sk: The kernel netlink socket, as returned by netlink_kernel_create().
+ * @groups: The new number of groups.
+ */
+int netlink_change_ngroups(struct sock *sk, unsigned int groups)
+{
+ int err;
+
+ netlink_table_grab();
+ err = __netlink_change_ngroups(sk, groups);
netlink_table_ungrab();
+
return err;
}
+void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
+{
+ struct sock *sk;
+ struct hlist_node *node;
+ struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
+
+ sk_for_each_bound(sk, node, &tbl->mc_list)
+ netlink_update_socket_mc(nlk_sk(sk), group, 0);
+}
+
/**
* netlink_clear_multicast_users - kick off multicast listeners
*
*/
void netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
{
- struct sock *sk;
- struct hlist_node *node;
- struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
-
netlink_table_grab();
-
- sk_for_each_bound(sk, node, &tbl->mc_list)
- netlink_update_socket_mc(nlk_sk(sk), group, 0);
-
+ __netlink_clear_multicast_users(ksk, group);
netlink_table_ungrab();
}
}
rep = __nlmsg_put(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
- NLMSG_ERROR, sizeof(struct nlmsgerr), 0);
+ NLMSG_ERROR, payload, 0);
errmsg = nlmsg_data(rep);
errmsg->error = err;
memcpy(&errmsg->msg, nlh, err ? nlh->nlmsg_len : sizeof(*nlh));
if (v == SEQ_START_TOKEN)
seq_puts(seq,
"sk Eth Pid Groups "
- "Rmem Wmem Dump Locks Drops\n");
+ "Rmem Wmem Dump Locks Drops Inode\n");
else {
struct sock *s = v;
struct netlink_sock *nlk = nlk_sk(s);
- seq_printf(seq, "%p %-3d %-6d %08x %-8d %-8d %p %-8d %-8d\n",
+ seq_printf(seq, "%p %-3d %-6d %08x %-8d %-8d %p %-8d %-8d %-8lu\n",
s,
s->sk_protocol,
nlk->pid,
sk_wmem_alloc_get(s),
nlk->cb,
atomic_read(&s->sk_refcnt),
- atomic_read(&s->sk_drops)
+ atomic_read(&s->sk_drops),
+ sock_i_ino(s)
);
}
.sendpage = sock_no_sendpage,
};
-static struct net_proto_family netlink_family_ops = {
+static const struct net_proto_family netlink_family_ops = {
.family = PF_NETLINK,
.create = netlink_create,
.owner = THIS_MODULE, /* for consistency 8) */
if (!nl_table)
goto panic;
- if (num_physpages >= (128 * 1024))
- limit = num_physpages >> (21 - PAGE_SHIFT);
+ if (totalram_pages >= (128 * 1024))
+ limit = totalram_pages >> (21 - PAGE_SHIFT);
else
- limit = num_physpages >> (23 - PAGE_SHIFT);
+ limit = totalram_pages >> (23 - PAGE_SHIFT);
order = get_bitmask_order(limit) - 1 + PAGE_SHIFT;
limit = (1UL << order) / sizeof(struct hlist_head);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff