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/*
* Linux LVM Devices Cluster
*
* Copyright (c) 2013-2014 Red Hat.
*
* 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 <sys/stat.h>
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "indom.h"
#include "devmapper.h"
int
refresh_dev_mapper(dev_mapper_t *lvs)
{
int i;
DIR *dirp;
struct dirent *dentry;
struct stat statbuf;
char path[MAXPATHLEN];
snprintf(path, sizeof(path), "%s/dev/mapper", linux_statspath);
if ((dirp = opendir(path)) == NULL)
return 1;
for (i = 0; i < lvs->nlv; i++) {
free(lvs->lv[i].dev_name);
free(lvs->lv[i].lv_name);
}
lvs->nlv = 0;
lvs->lv = NULL;
while ((dentry = readdir(dirp)) != NULL) {
char linkname[MAXPATHLEN];
int linkname_len;
snprintf(path, sizeof(path),
"%s/dev/mapper/%s", linux_statspath, dentry->d_name);
if (stat(path, &statbuf) == -1)
continue;
if (!S_ISBLK(statbuf.st_mode))
continue;
if ((linkname_len = readlink(path, linkname, sizeof(linkname)-1)) < 0)
continue;
linkname[linkname_len] = '\0';
i = lvs->nlv;
lvs->nlv++;
lvs->lv = (lv_entry_t *)realloc(lvs->lv, lvs->nlv * sizeof(lv_entry_t));
lvs->lv[i].id = lvs->nlv;
lvs->lv[i].dev_name = malloc(strlen(dentry->d_name)+1);
strcpy(lvs->lv[i].dev_name, dentry->d_name);
lvs->lv[i].lv_name = malloc(linkname_len+1);
strcpy(lvs->lv[i].lv_name, linkname);
}
closedir(dirp);
if (lvs->lv_indom->it_numinst != lvs->nlv) {
lvs->lv_indom->it_numinst = lvs->nlv;
lvs->lv_indom->it_set = (pmdaInstid *)
realloc(lvs->lv_indom->it_set, lvs->nlv * sizeof(pmdaInstid));
}
for (i = 0; i < lvs->nlv; i++) {
int skip_prefix = 0;
lvs->lv_indom->it_set[i].i_inst = lvs->lv[i].id;
if (strncmp(lvs->lv[i].lv_name, "../", 3) == 0)
skip_prefix = 3;
lvs->lv_indom->it_set[i].i_name = lvs->lv[i].lv_name + skip_prefix;
}
return 0;
}
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