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9446b87add
tipc_msg_build() now copies message data from iovec to skb_buff using memcpy_fromiovecend(), which doesn't need to be passed the iovec length to perform the copying. So we remove the parameter indicating iovec length in all functions where TIPC messages are built and sent. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
102 lines
3.3 KiB
C
102 lines
3.3 KiB
C
/*
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* net/tipc/msg.c: TIPC message header routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2005, 2010-2011, 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 "msg.h"
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u32 tipc_msg_tot_importance(struct tipc_msg *m)
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{
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if (likely(msg_isdata(m))) {
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if (likely(msg_orignode(m) == tipc_own_addr))
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return msg_importance(m);
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return msg_importance(m) + 4;
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}
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if ((msg_user(m) == MSG_FRAGMENTER) &&
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(msg_type(m) == FIRST_FRAGMENT))
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return msg_importance(msg_get_wrapped(m));
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return msg_importance(m);
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}
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void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize,
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u32 destnode)
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{
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memset(m, 0, hsize);
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msg_set_version(m);
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msg_set_user(m, user);
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msg_set_hdr_sz(m, hsize);
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msg_set_size(m, hsize);
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msg_set_prevnode(m, tipc_own_addr);
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msg_set_type(m, type);
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msg_set_orignode(m, tipc_own_addr);
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msg_set_destnode(m, destnode);
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}
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/**
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* tipc_msg_build - create message using specified header and data
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*
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* Note: Caller must not hold any locks in case copy_from_user() is interrupted!
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*
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* Returns message data size or errno
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*/
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int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
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unsigned int len, int max_size, struct sk_buff **buf)
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{
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int dsz, sz, hsz;
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unsigned char *to;
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dsz = len;
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hsz = msg_hdr_sz(hdr);
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sz = hsz + dsz;
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msg_set_size(hdr, sz);
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if (unlikely(sz > max_size)) {
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*buf = NULL;
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return dsz;
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}
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*buf = tipc_buf_acquire(sz);
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if (!(*buf))
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return -ENOMEM;
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skb_copy_to_linear_data(*buf, hdr, hsz);
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to = (*buf)->data + hsz;
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if (len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) {
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kfree_skb(*buf);
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*buf = NULL;
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return -EFAULT;
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}
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return dsz;
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}
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