1 files changed, 86 insertions, 0 deletions
diff --git a/src/pmdas/linux/devmapper.c b/src/pmdas/linux/devmapper.c
new file mode 100644
index 0000000..38f87d3
--- /dev/null
+++ b/src/pmdas/linux/devmapper.c
@@ -0,0 +1,86 @@
+/*
+ * 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;
+}