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/*
* Linux Filesystem Cluster
*
* Copyright (c) 2014 Red Hat.
* Copyright (c) 2000,2004,2007-2008 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 "filesys.h"
char *
scan_filesys_options(const char *options, const char *option)
{
static char buffer[128];
char *s;
strncpy(buffer, options, sizeof(buffer));
buffer[sizeof(buffer)-1] = '\0';
s = strtok(buffer, ",");
while (s) {
if (strcmp(s, option) == 0)
return s;
s = strtok(NULL, ",");
}
return NULL;
}
int
refresh_filesys(pmInDom filesys_indom, pmInDom tmpfs_indom)
{
char buf[MAXPATHLEN];
char realdevice[MAXPATHLEN];
filesys_t *fs;
pmInDom indom;
FILE *fp;
char *path, *device, *type, *options;
int sts;
pmdaCacheOp(tmpfs_indom, PMDA_CACHE_INACTIVE);
pmdaCacheOp(filesys_indom, PMDA_CACHE_INACTIVE);
if ((fp = linux_statsfile("/proc/mounts", buf, sizeof(buf))) == NULL)
return -oserror();
while (fgets(buf, sizeof(buf), fp) != NULL) {
if ((device = strtok(buf, " ")) == 0)
continue;
path = strtok(NULL, " ");
type = strtok(NULL, " ");
options = strtok(NULL, " ");
if (strcmp(type, "proc") == 0 ||
strcmp(type, "nfs") == 0 ||
strcmp(type, "devfs") == 0 ||
strcmp(type, "devpts") == 0 ||
strcmp(type, "cgroup") == 0 ||
strncmp(type, "auto", 4) == 0)
continue;
indom = filesys_indom;
if (strcmp(type, "tmpfs") == 0) {
indom = tmpfs_indom;
device = path;
}
else if (strncmp(device, "/dev", 4) != 0)
continue;
if (realpath(device, realdevice) != NULL)
device = realdevice;
sts = pmdaCacheLookupName(indom, device, NULL, (void **)&fs);
if (sts == PMDA_CACHE_ACTIVE) /* repeated line in /proc/mounts? */
continue;
if (sts == PMDA_CACHE_INACTIVE) { /* re-activate an old mount */
pmdaCacheStore(indom, PMDA_CACHE_ADD, device, fs);
if (strcmp(path, fs->path) != 0) { /* old device, new path */
free(fs->path);
fs->path = strdup(path);
}
if (strcmp(options, fs->options) != 0) { /* old device, new opts */
free(fs->options);
fs->options = strdup(options);
}
}
else { /* new mount */
if ((fs = malloc(sizeof(filesys_t))) == NULL)
continue;
fs->device = strdup(device);
fs->path = strdup(path);
fs->options = strdup(options);
#if PCP_DEBUG
if (pmDebug & DBG_TRACE_LIBPMDA) {
fprintf(stderr, "refresh_filesys: add \"%s\" \"%s\"\n",
fs->path, device);
}
#endif
pmdaCacheStore(indom, PMDA_CACHE_ADD, device, fs);
}
fs->flags = 0;
}
/*
* success
* Note: we do not call statfs() here since only some instances
* may be requested (rather, we do it in linux_fetch, see pmda.c).
*/
fclose(fp);
return 0;
}
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