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Obtain detailed IOB information by parsing the /proc/iobinfo file. Signed-off-by: meijian <meijian@xiaomi.com>
108 lines
No EOL
3.1 KiB
C
108 lines
No EOL
3.1 KiB
C
/****************************************************************************
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* apps/netutils/netlib/netlib_getiobinfo.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <netinet/in.h>
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#include <net/if.h>
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#include "netutils/netlib.h"
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#ifdef CONFIG_MM_IOB
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Determines the size of an intermediate buffer that must be large enough
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* to handle the longest line generated by this logic.
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*/
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#define PROCFS_LINELEN 80
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#define PROCFS_IOB_PATH "/proc/iobinfo"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netlib_get_iobinfo
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*
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* Description:
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* Get the network iob info.
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*
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* Parameters:
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* iob The pointer to return iobinfo.
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*
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* Return:
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* 0 on success; a nagtive on failure.
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*
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****************************************************************************/
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int netlib_get_iobinfo(FAR struct iob_stats_s *iob)
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{
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int ret = OK;
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FAR FILE *stream;
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char line[PROCFS_LINELEN];
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stream = fopen(PROCFS_IOB_PATH, "r");
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if (stream == NULL)
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{
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fprintf(stderr, "ERROR: Failed to open path:%s \n", PROCFS_IOB_PATH);
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return -errno;
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}
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/* Read ioninfo header and next is the data */
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if (fgets(line, sizeof(line), stream) != NULL)
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{
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if (fgets(line, sizeof(line), stream) == NULL)
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{
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ret = -EINVAL;
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fclose(stream);
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return ret;
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}
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if (sscanf(line, "%d %d %d %d", &iob->ntotal, &iob->nfree,
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&iob->nwait, &iob->nthrottle) <= 0)
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{
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ret = -errno;
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fclose(stream);
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return ret;
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}
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}
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fclose(stream);
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return ret;
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}
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#endif /* CONFIG_MM_IOB */ |