/* Starts a Netlink "dump" operation, by sending 'request' to the kernel on a
* Netlink socket created with the given 'protocol', and initializes 'dump' to
* reflect the state of the operation.
*
* nlmsg_len in 'msg' will be finalized to match msg->size, and nlmsg_pid will
* be set to the Netlink socket's pid, before the message is sent. NLM_F_DUMP
* and NLM_F_ACK will be set in nlmsg_flags.
*
* The design of this Netlink socket library ensures that the dump is reliable.
*
* This function provides no status indication. An error status for the entire
* dump operation is provided when it is completed by calling nl_dump_done().
*
* The caller is responsible for destroying 'request'.
*/
void
nl_dump_start(struct nl_dump *dump, int protocol, const struct ofpbuf *request)
{
ofpbuf_init(&dump->buffer, 4096);
dump->status = nl_pool_alloc(protocol, &dump->sock);
if (dump->status) {
return;
}
nl_msg_nlmsghdr(request)->nlmsg_flags |= NLM_F_DUMP | NLM_F_ACK;
dump->status = nl_sock_send__(dump->sock, request,
nl_sock_allocate_seq(dump->sock, 1), true);
dump->seq = nl_msg_nlmsghdr(request)->nlmsg_seq;
}
/* Starts a Netlink "dump" operation, by sending 'request' to the kernel on a
* Netlink socket created with the given 'protocol', and initializes 'dump' to
* reflect the state of the operation.
*
* 'request' must contain a Netlink message. Before sending the message,
* nlmsg_len will be finalized to match request->size, and nlmsg_pid will be
* set to the Netlink socket's pid. NLM_F_DUMP and NLM_F_ACK will be set in
* nlmsg_flags.
*
* The design of this Netlink socket library ensures that the dump is reliable.
*
* This function provides no status indication. nl_dump_done() provides an
* error status for the entire dump operation.
*
* The caller must eventually destroy 'request'.
*/
void
nl_dump_start(struct nl_dump *dump, int protocol, const struct ofpbuf *request)
{
nl_msg_nlmsghdr(request)->nlmsg_flags |= NLM_F_DUMP | NLM_F_ACK;
ovs_mutex_init(&dump->mutex);
ovs_mutex_lock(&dump->mutex);
dump->status = nl_pool_alloc(protocol, &dump->sock);
if (!dump->status) {
dump->status = nl_sock_send__(dump->sock, request,
nl_sock_allocate_seq(dump->sock, 1),
true);
}
dump->nl_seq = nl_msg_nlmsghdr(request)->nlmsg_seq;
ovs_mutex_unlock(&dump->mutex);
}