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23b0ca5bf5
Increasing the module ref count at registration will block the module from ever being unloaded. In fact, genetlink should not care about the owner at all. This patch removes the owner field from the struct registered with genetlink. Signed-off-by: Per Liden <per.liden@ericsson.com> Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
113 lines
3.5 KiB
C
113 lines
3.5 KiB
C
/*
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* net/tipc/netlink.c: TIPC configuration handling
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*
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* Copyright (c) 2005-2006, Ericsson AB
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* Copyright (c) 2005, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "core.h"
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#include "config.h"
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#include <net/genetlink.h>
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static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
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{
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struct sk_buff *rep_buf;
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struct nlmsghdr *rep_nlh;
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struct nlmsghdr *req_nlh = info->nlhdr;
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struct tipc_genlmsghdr *req_userhdr = info->userhdr;
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int hdr_space = NLMSG_SPACE(GENL_HDRLEN + TIPC_GENL_HDRLEN);
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if ((req_userhdr->cmd & 0xC000) && (!capable(CAP_NET_ADMIN)))
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rep_buf = cfg_reply_error_string(TIPC_CFG_NOT_NET_ADMIN);
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else
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rep_buf = cfg_do_cmd(req_userhdr->dest,
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req_userhdr->cmd,
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NLMSG_DATA(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN,
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NLMSG_PAYLOAD(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN),
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hdr_space);
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if (rep_buf) {
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skb_push(rep_buf, hdr_space);
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rep_nlh = (struct nlmsghdr *)rep_buf->data;
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memcpy(rep_nlh, req_nlh, hdr_space);
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rep_nlh->nlmsg_len = rep_buf->len;
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genlmsg_unicast(rep_buf, req_nlh->nlmsg_pid);
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}
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return 0;
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}
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static struct genl_family family = {
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.id = GENL_ID_GENERATE,
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.name = TIPC_GENL_NAME,
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.version = TIPC_GENL_VERSION,
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.hdrsize = TIPC_GENL_HDRLEN,
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.maxattr = 0,
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};
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static struct genl_ops ops = {
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.cmd = TIPC_GENL_CMD,
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.doit = handle_cmd,
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};
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static int family_registered = 0;
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int netlink_start(void)
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{
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if (genl_register_family(&family))
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goto err;
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family_registered = 1;
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if (genl_register_ops(&family, &ops))
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goto err_unregister;
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return 0;
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err_unregister:
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genl_unregister_family(&family);
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family_registered = 0;
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err:
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err("Failed to register netlink interface\n");
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return -EFAULT;
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}
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void netlink_stop(void)
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{
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if (family_registered) {
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genl_unregister_family(&family);
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family_registered = 0;
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}
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}
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