151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*
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* Copyright (C) 2017 THL A29 Limited, a Tencent company.
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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 notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <string.h>
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#include <sys/socket.h>
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#include <rte_malloc.h>
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#include "ff_ipc.h"
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int
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sysctl(int *name, unsigned namelen, void *old,
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size_t *oldlenp, const void *new, size_t newlen)
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{
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struct ff_msg *msg, *retmsg = NULL;
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char *extra_buf = NULL, *original_buf = NULL;
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size_t total_len, original_buf_len;
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if (old != NULL && oldlenp == NULL) {
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errno = EINVAL;
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return -1;
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}
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msg = ff_ipc_msg_alloc();
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if (msg == NULL) {
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errno = ENOMEM;
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return -1;
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}
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size_t oldlen = 0;
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if (old && oldlenp) {
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oldlen = *oldlenp;
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}
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total_len = namelen + oldlen + newlen;
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if (total_len > msg->buf_len) {
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extra_buf = rte_malloc(NULL, total_len, 0);
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if (extra_buf == NULL) {
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errno = ENOMEM;
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ff_ipc_msg_free(msg);
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return -1;
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}
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original_buf = msg->buf_addr;
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original_buf_len = msg->buf_len;
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msg->buf_addr = extra_buf;
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msg->buf_len = total_len;
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}
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char *buf_addr = msg->buf_addr;
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msg->msg_type = FF_SYSCTL;
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msg->sysctl.name = (int *)buf_addr;
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msg->sysctl.namelen = namelen;
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memcpy(msg->sysctl.name, name, namelen * sizeof(int));
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buf_addr += namelen * sizeof(int);
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if (new != NULL && newlen != 0) {
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msg->sysctl.new = buf_addr;
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msg->sysctl.newlen = newlen;
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memcpy(msg->sysctl.new, new, newlen);
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buf_addr += newlen;
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} else {
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msg->sysctl.new = NULL;
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msg->sysctl.newlen = 0;
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}
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if (oldlenp != NULL) {
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msg->sysctl.oldlenp = (size_t *)buf_addr;
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memcpy(msg->sysctl.oldlenp, oldlenp, sizeof(size_t));
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buf_addr += sizeof(size_t);
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if (old != NULL) {
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msg->sysctl.old = (void *)buf_addr;
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memcpy(msg->sysctl.old, old, *oldlenp);
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buf_addr += *oldlenp;
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} else {
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msg->sysctl.old = NULL;
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}
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} else {
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msg->sysctl.oldlenp = NULL;
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msg->sysctl.old = NULL;
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}
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int ret = ff_ipc_send(msg);
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if (ret < 0) {
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errno = EPIPE;
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goto error;
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}
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do {
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if (retmsg != NULL) {
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ff_ipc_msg_free(retmsg);
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}
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ret = ff_ipc_recv(&retmsg, msg->msg_type);
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if (ret < 0) {
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errno = EPIPE;
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goto error;
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}
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} while (msg != retmsg);
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if (retmsg->result == 0) {
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ret = 0;
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if (oldlenp && retmsg->sysctl.oldlenp) {
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*oldlenp = *retmsg->sysctl.oldlenp;
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}
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if (old && retmsg->sysctl.old && oldlenp) {
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memcpy(old, retmsg->sysctl.old, *oldlenp);
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}
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} else {
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ret = -1;
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errno = retmsg->result;
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}
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error:
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if (original_buf) {
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msg->buf_addr = original_buf;
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msg->buf_len = original_buf_len;
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}
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ff_ipc_msg_free(msg);
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if (extra_buf) {
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rte_free(extra_buf);
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}
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return ret;
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}
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