1 files changed, 122 insertions, 0 deletions
diff --git a/src/pmdas/linux/filesys.c b/src/pmdas/linux/filesys.c
new file mode 100644
index 0000000..3c06c13
--- /dev/null
+++ b/src/pmdas/linux/filesys.c
@@ -0,0 +1,122 @@
+/*
+ * 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;
+}