37e2d4843f
Convert setting of link proprieties to compat doit calls. Commands converted in this patch: TIPC_CMD_SET_LINK_TOL TIPC_CMD_SET_LINK_PRI TIPC_CMD_SET_LINK_WINDOW Signed-off-by: Richard Alpe <richard.alpe@ericsson.com> Reviewed-by: Erik Hugne <erik.hugne@ericsson.com> Reviewed-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
797 lines
21 KiB
C
797 lines
21 KiB
C
/*
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* Copyright (c) 2014, Ericsson AB
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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 "bearer.h"
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#include "link.h"
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#include <net/genetlink.h>
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#include <linux/tipc_config.h>
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/* The legacy API had an artificial message length limit called
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* ULTRA_STRING_MAX_LEN.
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*/
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#define ULTRA_STRING_MAX_LEN 32768
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#define TIPC_SKB_MAX TLV_SPACE(ULTRA_STRING_MAX_LEN)
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#define REPLY_TRUNCATED "<truncated>\n"
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struct tipc_nl_compat_msg {
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u16 cmd;
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int rep_type;
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int rep_size;
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int req_type;
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struct sk_buff *rep;
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struct tlv_desc *req;
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struct sock *dst_sk;
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};
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struct tipc_nl_compat_cmd_dump {
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int (*dumpit)(struct sk_buff *, struct netlink_callback *);
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int (*format)(struct tipc_nl_compat_msg *msg, struct nlattr **attrs);
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};
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struct tipc_nl_compat_cmd_doit {
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int (*doit)(struct sk_buff *skb, struct genl_info *info);
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int (*transcode)(struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
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};
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static int tipc_skb_tailroom(struct sk_buff *skb)
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{
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int tailroom;
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int limit;
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tailroom = skb_tailroom(skb);
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limit = TIPC_SKB_MAX - skb->len;
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if (tailroom < limit)
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return tailroom;
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return limit;
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}
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static int tipc_add_tlv(struct sk_buff *skb, u16 type, void *data, u16 len)
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{
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struct tlv_desc *tlv = (struct tlv_desc *)skb_tail_pointer(skb);
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if (tipc_skb_tailroom(skb) < TLV_SPACE(len))
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return -EMSGSIZE;
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skb_put(skb, TLV_SPACE(len));
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tlv->tlv_type = htons(type);
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tlv->tlv_len = htons(TLV_LENGTH(len));
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if (len && data)
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memcpy(TLV_DATA(tlv), data, len);
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return 0;
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}
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static void tipc_tlv_init(struct sk_buff *skb, u16 type)
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{
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struct tlv_desc *tlv = (struct tlv_desc *)skb->data;
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TLV_SET_LEN(tlv, 0);
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TLV_SET_TYPE(tlv, type);
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skb_put(skb, sizeof(struct tlv_desc));
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}
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static int tipc_tlv_sprintf(struct sk_buff *skb, const char *fmt, ...)
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{
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int n;
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u16 len;
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u32 rem;
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char *buf;
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struct tlv_desc *tlv;
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va_list args;
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rem = tipc_skb_tailroom(skb);
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tlv = (struct tlv_desc *)skb->data;
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len = TLV_GET_LEN(tlv);
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buf = TLV_DATA(tlv) + len;
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va_start(args, fmt);
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n = vscnprintf(buf, rem, fmt, args);
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va_end(args);
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TLV_SET_LEN(tlv, n + len);
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skb_put(skb, n);
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return n;
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}
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static struct sk_buff *tipc_tlv_alloc(int size)
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{
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int hdr_len;
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struct sk_buff *buf;
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size = TLV_SPACE(size);
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hdr_len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
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buf = alloc_skb(hdr_len + size, GFP_KERNEL);
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if (!buf)
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return NULL;
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skb_reserve(buf, hdr_len);
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return buf;
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}
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static struct sk_buff *tipc_get_err_tlv(char *str)
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{
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int str_len = strlen(str) + 1;
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struct sk_buff *buf;
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buf = tipc_tlv_alloc(TLV_SPACE(str_len));
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if (buf)
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tipc_add_tlv(buf, TIPC_TLV_ERROR_STRING, str, str_len);
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return buf;
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}
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static int __tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
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struct tipc_nl_compat_msg *msg,
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struct sk_buff *arg)
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{
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int len = 0;
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int err;
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struct sk_buff *buf;
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struct nlmsghdr *nlmsg;
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struct netlink_callback cb;
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memset(&cb, 0, sizeof(cb));
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cb.nlh = (struct nlmsghdr *)arg->data;
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cb.skb = arg;
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buf = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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buf->sk = msg->dst_sk;
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do {
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int rem;
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len = (*cmd->dumpit)(buf, &cb);
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nlmsg_for_each_msg(nlmsg, nlmsg_hdr(buf), len, rem) {
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struct nlattr **attrs;
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err = tipc_nlmsg_parse(nlmsg, &attrs);
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if (err)
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goto err_out;
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err = (*cmd->format)(msg, attrs);
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if (err)
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goto err_out;
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if (tipc_skb_tailroom(msg->rep) <= 1) {
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err = -EMSGSIZE;
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goto err_out;
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}
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}
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skb_reset_tail_pointer(buf);
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buf->len = 0;
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} while (len);
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err = 0;
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err_out:
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kfree_skb(buf);
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if (err == -EMSGSIZE) {
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/* The legacy API only considered messages filling
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* "ULTRA_STRING_MAX_LEN" to be truncated.
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*/
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if ((TIPC_SKB_MAX - msg->rep->len) <= 1) {
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char *tail = skb_tail_pointer(msg->rep);
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if (*tail != '\0')
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sprintf(tail - sizeof(REPLY_TRUNCATED) - 1,
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REPLY_TRUNCATED);
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}
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return 0;
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}
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return err;
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}
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static int tipc_nl_compat_dumpit(struct tipc_nl_compat_cmd_dump *cmd,
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struct tipc_nl_compat_msg *msg)
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{
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int err;
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struct sk_buff *arg;
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if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
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return -EINVAL;
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msg->rep = tipc_tlv_alloc(msg->rep_size);
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if (!msg->rep)
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return -ENOMEM;
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if (msg->rep_type)
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tipc_tlv_init(msg->rep, msg->rep_type);
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arg = nlmsg_new(0, GFP_KERNEL);
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if (!arg) {
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kfree_skb(msg->rep);
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return -ENOMEM;
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}
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err = __tipc_nl_compat_dumpit(cmd, msg, arg);
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if (err)
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kfree_skb(msg->rep);
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kfree_skb(arg);
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return err;
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}
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static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
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struct tipc_nl_compat_msg *msg)
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{
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int err;
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struct sk_buff *doit_buf;
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struct sk_buff *trans_buf;
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struct nlattr **attrbuf;
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struct genl_info info;
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trans_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
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if (!trans_buf)
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return -ENOMEM;
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err = (*cmd->transcode)(trans_buf, msg);
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if (err)
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goto trans_out;
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attrbuf = kmalloc((tipc_genl_family.maxattr + 1) *
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sizeof(struct nlattr *), GFP_KERNEL);
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if (!attrbuf) {
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err = -ENOMEM;
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goto trans_out;
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}
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err = nla_parse(attrbuf, tipc_genl_family.maxattr,
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(const struct nlattr *)trans_buf->data,
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trans_buf->len, NULL);
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if (err)
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goto parse_out;
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doit_buf = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
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if (!doit_buf) {
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err = -ENOMEM;
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goto parse_out;
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}
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doit_buf->sk = msg->dst_sk;
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memset(&info, 0, sizeof(info));
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info.attrs = attrbuf;
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err = (*cmd->doit)(doit_buf, &info);
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kfree_skb(doit_buf);
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parse_out:
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kfree(attrbuf);
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trans_out:
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kfree_skb(trans_buf);
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return err;
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}
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static int tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
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struct tipc_nl_compat_msg *msg)
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{
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int err;
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if (msg->req_type && !TLV_CHECK_TYPE(msg->req, msg->req_type))
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return -EINVAL;
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err = __tipc_nl_compat_doit(cmd, msg);
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if (err)
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return err;
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/* The legacy API considered an empty message a success message */
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msg->rep = tipc_tlv_alloc(0);
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if (!msg->rep)
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return -ENOMEM;
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return 0;
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}
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static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
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struct nlattr **attrs)
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{
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struct nlattr *bearer[TIPC_NLA_BEARER_MAX + 1];
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nla_parse_nested(bearer, TIPC_NLA_BEARER_MAX, attrs[TIPC_NLA_BEARER],
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NULL);
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return tipc_add_tlv(msg->rep, TIPC_TLV_BEARER_NAME,
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nla_data(bearer[TIPC_NLA_BEARER_NAME]),
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nla_len(bearer[TIPC_NLA_BEARER_NAME]));
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}
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static int tipc_nl_compat_bearer_enable(struct sk_buff *skb,
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struct tipc_nl_compat_msg *msg)
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{
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struct nlattr *prop;
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struct nlattr *bearer;
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struct tipc_bearer_config *b;
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b = (struct tipc_bearer_config *)TLV_DATA(msg->req);
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bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
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if (!bearer)
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return -EMSGSIZE;
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if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, b->name))
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return -EMSGSIZE;
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if (nla_put_u32(skb, TIPC_NLA_BEARER_DOMAIN, ntohl(b->disc_domain)))
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return -EMSGSIZE;
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if (ntohl(b->priority) <= TIPC_MAX_LINK_PRI) {
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prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
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if (!prop)
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return -EMSGSIZE;
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if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(b->priority)))
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return -EMSGSIZE;
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nla_nest_end(skb, prop);
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}
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nla_nest_end(skb, bearer);
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return 0;
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}
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static int tipc_nl_compat_bearer_disable(struct sk_buff *skb,
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struct tipc_nl_compat_msg *msg)
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{
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char *name;
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struct nlattr *bearer;
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name = (char *)TLV_DATA(msg->req);
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bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
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if (!bearer)
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return -EMSGSIZE;
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if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, name))
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return -EMSGSIZE;
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nla_nest_end(skb, bearer);
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return 0;
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}
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static inline u32 perc(u32 count, u32 total)
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{
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return (count * 100 + (total / 2)) / total;
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}
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static void __fill_bc_link_stat(struct tipc_nl_compat_msg *msg,
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struct nlattr *prop[], struct nlattr *stats[])
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{
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tipc_tlv_sprintf(msg->rep, " Window:%u packets\n",
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nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
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tipc_tlv_sprintf(msg->rep,
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" RX packets:%u fragments:%u/%u bundles:%u/%u\n",
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nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
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nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
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nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
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nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
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nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
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tipc_tlv_sprintf(msg->rep,
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" TX packets:%u fragments:%u/%u bundles:%u/%u\n",
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nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
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nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
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nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
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nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
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nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
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tipc_tlv_sprintf(msg->rep, " RX naks:%u defs:%u dups:%u\n",
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nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
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nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
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nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
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tipc_tlv_sprintf(msg->rep, " TX naks:%u acks:%u dups:%u\n",
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nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
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nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
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nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
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tipc_tlv_sprintf(msg->rep,
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" Congestion link:%u Send queue max:%u avg:%u",
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nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
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nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
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nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
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}
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static int tipc_nl_compat_link_stat_dump(struct tipc_nl_compat_msg *msg,
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struct nlattr **attrs)
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{
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char *name;
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struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
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struct nlattr *prop[TIPC_NLA_PROP_MAX + 1];
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struct nlattr *stats[TIPC_NLA_STATS_MAX + 1];
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nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
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nla_parse_nested(prop, TIPC_NLA_PROP_MAX, link[TIPC_NLA_LINK_PROP],
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NULL);
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nla_parse_nested(stats, TIPC_NLA_STATS_MAX, link[TIPC_NLA_LINK_STATS],
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NULL);
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name = (char *)TLV_DATA(msg->req);
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if (strcmp(name, nla_data(link[TIPC_NLA_LINK_NAME])) != 0)
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return 0;
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tipc_tlv_sprintf(msg->rep, "\nLink <%s>\n",
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nla_data(link[TIPC_NLA_LINK_NAME]));
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if (link[TIPC_NLA_LINK_BROADCAST]) {
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__fill_bc_link_stat(msg, prop, stats);
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return 0;
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}
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if (link[TIPC_NLA_LINK_ACTIVE])
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tipc_tlv_sprintf(msg->rep, " ACTIVE");
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else if (link[TIPC_NLA_LINK_UP])
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tipc_tlv_sprintf(msg->rep, " STANDBY");
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else
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tipc_tlv_sprintf(msg->rep, " DEFUNCT");
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tipc_tlv_sprintf(msg->rep, " MTU:%u Priority:%u",
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nla_get_u32(link[TIPC_NLA_LINK_MTU]),
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nla_get_u32(prop[TIPC_NLA_PROP_PRIO]));
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tipc_tlv_sprintf(msg->rep, " Tolerance:%u ms Window:%u packets\n",
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nla_get_u32(prop[TIPC_NLA_PROP_TOL]),
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|
nla_get_u32(prop[TIPC_NLA_PROP_WIN]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" RX packets:%u fragments:%u/%u bundles:%u/%u\n",
|
|
nla_get_u32(link[TIPC_NLA_LINK_RX]) -
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_INFO]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_FRAGMENTED]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_BUNDLED]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" TX packets:%u fragments:%u/%u bundles:%u/%u\n",
|
|
nla_get_u32(link[TIPC_NLA_LINK_TX]) -
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_INFO]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_FRAGMENTED]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_BUNDLED]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" TX profile sample:%u packets average:%u octets\n",
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_CNT]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_TOT]) /
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" 0-64:%u%% -256:%u%% -1024:%u%% -4096:%u%% ",
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P0]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P1]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P2]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P3]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
|
|
|
|
tipc_tlv_sprintf(msg->rep, "-16384:%u%% -32768:%u%% -66000:%u%%\n",
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P4]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P5]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])),
|
|
perc(nla_get_u32(stats[TIPC_NLA_STATS_MSG_LEN_P6]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MSG_PROF_TOT])));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" RX states:%u probes:%u naks:%u defs:%u dups:%u\n",
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_STATES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_PROBES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_NACKS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RX_DEFERRED]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_DUPLICATES]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" TX states:%u probes:%u naks:%u acks:%u dups:%u\n",
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_STATES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_PROBES]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_NACKS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_TX_ACKS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_RETRANSMITTED]));
|
|
|
|
tipc_tlv_sprintf(msg->rep,
|
|
" Congestion link:%u Send queue max:%u avg:%u",
|
|
nla_get_u32(stats[TIPC_NLA_STATS_LINK_CONGS]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_MAX_QUEUE]),
|
|
nla_get_u32(stats[TIPC_NLA_STATS_AVG_QUEUE]));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
|
|
struct nlattr **attrs)
|
|
{
|
|
struct nlattr *link[TIPC_NLA_LINK_MAX + 1];
|
|
struct tipc_link_info link_info;
|
|
|
|
nla_parse_nested(link, TIPC_NLA_LINK_MAX, attrs[TIPC_NLA_LINK], NULL);
|
|
|
|
link_info.dest = nla_get_flag(link[TIPC_NLA_LINK_DEST]);
|
|
link_info.up = htonl(nla_get_flag(link[TIPC_NLA_LINK_UP]));
|
|
strcpy(link_info.str, nla_data(link[TIPC_NLA_LINK_NAME]));
|
|
|
|
return tipc_add_tlv(msg->rep, TIPC_TLV_LINK_INFO,
|
|
&link_info, sizeof(link_info));
|
|
}
|
|
|
|
static int tipc_nl_compat_link_set(struct sk_buff *skb,
|
|
struct tipc_nl_compat_msg *msg)
|
|
{
|
|
struct nlattr *link;
|
|
struct nlattr *prop;
|
|
struct tipc_link_config *lc;
|
|
|
|
lc = (struct tipc_link_config *)TLV_DATA(msg->req);
|
|
|
|
link = nla_nest_start(skb, TIPC_NLA_LINK);
|
|
if (!link)
|
|
return -EMSGSIZE;
|
|
|
|
if (nla_put_string(skb, TIPC_NLA_LINK_NAME, lc->name))
|
|
return -EMSGSIZE;
|
|
|
|
prop = nla_nest_start(skb, TIPC_NLA_LINK_PROP);
|
|
if (!prop)
|
|
return -EMSGSIZE;
|
|
|
|
if (msg->cmd == TIPC_CMD_SET_LINK_PRI) {
|
|
if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)))
|
|
return -EMSGSIZE;
|
|
} else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) {
|
|
if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)))
|
|
return -EMSGSIZE;
|
|
} else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) {
|
|
if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)))
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
nla_nest_end(skb, prop);
|
|
nla_nest_end(skb, link);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tipc_nl_compat_handle(struct tipc_nl_compat_msg *msg)
|
|
{
|
|
struct tipc_nl_compat_cmd_dump dump;
|
|
struct tipc_nl_compat_cmd_doit doit;
|
|
|
|
memset(&dump, 0, sizeof(dump));
|
|
memset(&doit, 0, sizeof(doit));
|
|
|
|
switch (msg->cmd) {
|
|
case TIPC_CMD_GET_BEARER_NAMES:
|
|
msg->rep_size = MAX_BEARERS * TLV_SPACE(TIPC_MAX_BEARER_NAME);
|
|
dump.dumpit = tipc_nl_bearer_dump;
|
|
dump.format = tipc_nl_compat_bearer_dump;
|
|
return tipc_nl_compat_dumpit(&dump, msg);
|
|
case TIPC_CMD_ENABLE_BEARER:
|
|
msg->req_type = TIPC_TLV_BEARER_CONFIG;
|
|
doit.doit = tipc_nl_bearer_enable;
|
|
doit.transcode = tipc_nl_compat_bearer_enable;
|
|
return tipc_nl_compat_doit(&doit, msg);
|
|
case TIPC_CMD_DISABLE_BEARER:
|
|
msg->req_type = TIPC_TLV_BEARER_NAME;
|
|
doit.doit = tipc_nl_bearer_disable;
|
|
doit.transcode = tipc_nl_compat_bearer_disable;
|
|
return tipc_nl_compat_doit(&doit, msg);
|
|
case TIPC_CMD_SHOW_LINK_STATS:
|
|
msg->req_type = TIPC_TLV_LINK_NAME;
|
|
msg->rep_size = ULTRA_STRING_MAX_LEN;
|
|
msg->rep_type = TIPC_TLV_ULTRA_STRING;
|
|
dump.dumpit = tipc_nl_link_dump;
|
|
dump.format = tipc_nl_compat_link_stat_dump;
|
|
return tipc_nl_compat_dumpit(&dump, msg);
|
|
case TIPC_CMD_GET_LINKS:
|
|
msg->req_type = TIPC_TLV_NET_ADDR;
|
|
msg->rep_size = ULTRA_STRING_MAX_LEN;
|
|
dump.dumpit = tipc_nl_link_dump;
|
|
dump.format = tipc_nl_compat_link_dump;
|
|
return tipc_nl_compat_dumpit(&dump, msg);
|
|
case TIPC_CMD_SET_LINK_TOL:
|
|
case TIPC_CMD_SET_LINK_PRI:
|
|
case TIPC_CMD_SET_LINK_WINDOW:
|
|
msg->req_type = TIPC_TLV_LINK_CONFIG;
|
|
doit.doit = tipc_nl_link_set;
|
|
doit.transcode = tipc_nl_compat_link_set;
|
|
return tipc_nl_compat_doit(&doit, msg);
|
|
}
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
int err;
|
|
int len;
|
|
struct tipc_nl_compat_msg msg;
|
|
struct nlmsghdr *req_nlh;
|
|
struct nlmsghdr *rep_nlh;
|
|
struct tipc_genlmsghdr *req_userhdr = info->userhdr;
|
|
struct net *net = genl_info_net(info);
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
|
|
req_nlh = (struct nlmsghdr *)skb->data;
|
|
msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
|
|
msg.cmd = req_userhdr->cmd;
|
|
msg.dst_sk = info->dst_sk;
|
|
|
|
if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
|
|
msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
|
|
err = -EACCES;
|
|
goto send;
|
|
}
|
|
|
|
len = nlmsg_attrlen(req_nlh, GENL_HDRLEN + TIPC_GENL_HDRLEN);
|
|
if (TLV_GET_LEN(msg.req) && !TLV_OK(msg.req, len)) {
|
|
msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
|
|
err = -EOPNOTSUPP;
|
|
goto send;
|
|
}
|
|
|
|
err = tipc_nl_compat_handle(&msg);
|
|
if (err == -EOPNOTSUPP)
|
|
msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
|
|
else if (err == -EINVAL)
|
|
msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
|
|
send:
|
|
if (!msg.rep)
|
|
return err;
|
|
|
|
len = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
|
|
skb_push(msg.rep, len);
|
|
rep_nlh = nlmsg_hdr(msg.rep);
|
|
memcpy(rep_nlh, info->nlhdr, len);
|
|
rep_nlh->nlmsg_len = msg.rep->len;
|
|
genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int handle_cmd(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct net *net = genl_info_net(info);
|
|
struct sk_buff *rep_buf;
|
|
struct nlmsghdr *rep_nlh;
|
|
struct nlmsghdr *req_nlh = info->nlhdr;
|
|
struct tipc_genlmsghdr *req_userhdr = info->userhdr;
|
|
int hdr_space = nlmsg_total_size(GENL_HDRLEN + TIPC_GENL_HDRLEN);
|
|
u16 cmd;
|
|
|
|
if ((req_userhdr->cmd & 0xC000) &&
|
|
(!netlink_net_capable(skb, CAP_NET_ADMIN)))
|
|
cmd = TIPC_CMD_NOT_NET_ADMIN;
|
|
else
|
|
cmd = req_userhdr->cmd;
|
|
|
|
rep_buf = tipc_cfg_do_cmd(net, req_userhdr->dest, cmd,
|
|
nlmsg_data(req_nlh) + GENL_HDRLEN +
|
|
TIPC_GENL_HDRLEN,
|
|
nlmsg_attrlen(req_nlh, GENL_HDRLEN +
|
|
TIPC_GENL_HDRLEN), hdr_space);
|
|
|
|
if (rep_buf) {
|
|
skb_push(rep_buf, hdr_space);
|
|
rep_nlh = nlmsg_hdr(rep_buf);
|
|
memcpy(rep_nlh, req_nlh, hdr_space);
|
|
rep_nlh->nlmsg_len = rep_buf->len;
|
|
genlmsg_unicast(net, rep_buf, NETLINK_CB(skb).portid);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Temporary function to keep functionality throughout the patchset
|
|
* without having to mess with the global variables and other trickery
|
|
* of the old API.
|
|
*/
|
|
static int tipc_nl_compat_tmp_wrap(struct sk_buff *skb, struct genl_info *info)
|
|
{
|
|
struct tipc_genlmsghdr *req = info->userhdr;
|
|
|
|
switch (req->cmd) {
|
|
case TIPC_CMD_GET_BEARER_NAMES:
|
|
case TIPC_CMD_ENABLE_BEARER:
|
|
case TIPC_CMD_DISABLE_BEARER:
|
|
case TIPC_CMD_SHOW_LINK_STATS:
|
|
case TIPC_CMD_GET_LINKS:
|
|
case TIPC_CMD_SET_LINK_TOL:
|
|
case TIPC_CMD_SET_LINK_PRI:
|
|
case TIPC_CMD_SET_LINK_WINDOW:
|
|
return tipc_nl_compat_recv(skb, info);
|
|
}
|
|
|
|
return handle_cmd(skb, info);
|
|
}
|
|
|
|
static struct genl_family tipc_genl_compat_family = {
|
|
.id = GENL_ID_GENERATE,
|
|
.name = TIPC_GENL_NAME,
|
|
.version = TIPC_GENL_VERSION,
|
|
.hdrsize = TIPC_GENL_HDRLEN,
|
|
.maxattr = 0,
|
|
.netnsok = true,
|
|
};
|
|
|
|
static struct genl_ops tipc_genl_compat_ops[] = {
|
|
{
|
|
.cmd = TIPC_GENL_CMD,
|
|
.doit = tipc_nl_compat_tmp_wrap,
|
|
},
|
|
};
|
|
|
|
int tipc_netlink_compat_start(void)
|
|
{
|
|
int res;
|
|
|
|
res = genl_register_family_with_ops(&tipc_genl_compat_family,
|
|
tipc_genl_compat_ops);
|
|
if (res) {
|
|
pr_err("Failed to register legacy compat interface\n");
|
|
return res;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void tipc_netlink_compat_stop(void)
|
|
{
|
|
genl_unregister_family(&tipc_genl_compat_family);
|
|
}
|