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/*
* Linux /proc/sys/fs metrics cluster
*
* Copyright (c) 2014 Red Hat.
* Copyright (c) 2003,2004 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "indom.h"
#include "proc_sys_fs.h"
int
refresh_proc_sys_fs(proc_sys_fs_t *proc_sys_fs)
{
static int err_reported;
char buf[MAXPATHLEN];
FILE *filesp = NULL;
FILE *inodep = NULL;
FILE *dentryp = NULL;
memset(proc_sys_fs, 0, sizeof(proc_sys_fs_t));
if ((filesp = linux_statsfile("/proc/sys/fs/file-nr", buf, sizeof(buf))) == NULL ||
(inodep = linux_statsfile("/proc/sys/fs/inode-state", buf, sizeof(buf))) == NULL ||
(dentryp = linux_statsfile("/proc/sys/fs/dentry-state", buf, sizeof(buf))) == NULL) {
proc_sys_fs->errcode = -oserror();
if (err_reported == 0)
fprintf(stderr, "Warning: vfs metrics are not available : %s\n",
osstrerror());
}
else {
proc_sys_fs->errcode = 0;
if (fscanf(filesp, "%d %d %d",
&proc_sys_fs->fs_files_count,
&proc_sys_fs->fs_files_free,
&proc_sys_fs->fs_files_max) != 3)
proc_sys_fs->errcode = PM_ERR_VALUE;
if (fscanf(inodep, "%d %d",
&proc_sys_fs->fs_inodes_count,
&proc_sys_fs->fs_inodes_free) != 2)
proc_sys_fs->errcode = PM_ERR_VALUE;
if (fscanf(dentryp, "%d %d",
&proc_sys_fs->fs_dentry_count,
&proc_sys_fs->fs_dentry_free) != 2)
proc_sys_fs->errcode = PM_ERR_VALUE;
#if PCP_DEBUG
if (pmDebug & DBG_TRACE_LIBPMDA) {
if (proc_sys_fs->errcode == 0)
fprintf(stderr, "refresh_proc_sys_fs: found vfs metrics\n");
else
fprintf(stderr, "refresh_proc_sys_fs: botch! missing vfs metrics\n");
}
#endif
}
if (filesp)
fclose(filesp);
if (inodep)
fclose(inodep);
if (dentryp)
fclose(dentryp);
if (!err_reported)
err_reported = 1;
if (proc_sys_fs->errcode == 0)
return 0;
return -1;
}
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