Fix compile time issues

[collectd.git] / src / zfs_arc.c

diff --git a/src/zfs_arc.c b/src/zfs_arc.c
index 730d304..a3c2451 100644 (file)
--- a/src/zfs_arc.c
+++ b/src/zfs_arc.c
@@ -29,12 +29,16 @@
 
 #include "collectd.h"
 
-#include "common.h"
 #include "plugin.h"
+#include "utils/common/common.h"
 
 /*
  * Global variables
  */
+static value_to_rate_state_t arc_hits_state;
+static value_to_rate_state_t arc_misses_state;
+static value_to_rate_state_t l2_hits_state;
+static value_to_rate_state_t l2_misses_state;
 
 #if defined(KERNEL_LINUX)
 #include "utils_llist.h"
@@ -95,6 +99,11 @@ static void free_zfs_values(kstat_t *ksp) {
 }
 
 #elif defined(KERNEL_SOLARIS)
+
+#if HAVE_KSTAT_H
+#include <kstat.h>
+#endif
+
 extern kstat_ctl_t *kc;
 
 static long long get_zfs_value(kstat_t *ksp, char *name) {
@@ -118,7 +127,7 @@ static long long get_zfs_value(kstat_t *dummy __attribute__((unused)),
   size_t valuelen = sizeof(value);
   int rv;
 
-  snprintf(buffer, sizeof(buffer), "%s%s", zfs_arcstat, name);
+  ssnprintf(buffer, sizeof(buffer), "%s%s", zfs_arcstat, name);
   rv = sysctlbyname(buffer, (void *)&value, &valuelen,
                     /* new value = */ NULL, /* new length = */ (size_t)0);
   if (rv == 0)
@@ -198,9 +207,20 @@ static int za_read(void) {
 
   fh = fopen(ZOL_ARCSTATS_FILE, "r");
   if (fh == NULL) {
-    char errbuf[1024];
     ERROR("zfs_arc plugin: Opening \"%s\" failed: %s", ZOL_ARCSTATS_FILE,
-          sstrerror(errno, errbuf, sizeof(errbuf)));
+          STRERRNO);
+    return -1;
+  }
+
+  /* Ignore the first two lines because they contain information about the rest
+   * of the file.
+   * See kstat_seq_show_headers module/spl/spl-kstat.c of the spl kernel module.
+   */
+  if ((fgets(buffer, sizeof(buffer), fh) == NULL) ||
+      (fgets(buffer, sizeof(buffer), fh) == NULL)) {
+    ERROR("zfs_arc plugin: \"%s\" does not contain at least two lines.",
+          ZOL_ARCSTATS_FILE);
+    fclose(fh);
     return -1;
   }
 
@@ -219,13 +239,13 @@ static int za_read(void) {
     ERROR("zfs_arc plugin: \"%s\" does not contain a single line.",
           ZOL_ARCSTATS_FILE);
     fclose(fh);
-    return -1;
+    return (-1);
   }
   if (fgets(buffer, sizeof(buffer), fh) == NULL) {
     ERROR("zfs_arc plugin: \"%s\" does not contain at least two lines.",
           ZOL_ARCSTATS_FILE);
     fclose(fh);
-    return -1;
+    return (-1);
   }
 
   while (fgets(buffer, sizeof(buffer), fh) != NULL) {
@@ -313,14 +333,25 @@ static int za_read(void) {
   za_read_derive(ksp, "mru_hits", "cache_result", "mru-hit");
   za_read_derive(ksp, "mru_ghost_hits", "cache_result", "mru_ghost-hit");
 
+  cdtime_t now = cdtime();
+
   /* Ratios */
-  arc_hits = (gauge_t)get_zfs_value(ksp, "hits");
-  arc_misses = (gauge_t)get_zfs_value(ksp, "misses");
-  l2_hits = (gauge_t)get_zfs_value(ksp, "l2_hits");
-  l2_misses = (gauge_t)get_zfs_value(ksp, "l2_misses");
+  if ((value_to_rate(&arc_hits, (value_t){.derive = get_zfs_value(ksp, "hits")},
+                     DS_TYPE_DERIVE, now, &arc_hits_state) == 0) &&
+      (value_to_rate(&arc_misses,
+                     (value_t){.derive = get_zfs_value(ksp, "misses")},
+                     DS_TYPE_DERIVE, now, &arc_misses_state) == 0)) {
+    za_submit_ratio("arc", arc_hits, arc_misses);
+  }
 
-  za_submit_ratio("arc", arc_hits, arc_misses);
-  za_submit_ratio("L2", l2_hits, l2_misses);
+  if ((value_to_rate(&l2_hits,
+                     (value_t){.derive = get_zfs_value(ksp, "l2_hits")},
+                     DS_TYPE_DERIVE, now, &l2_hits_state) == 0) &&
+      (value_to_rate(&l2_misses,
+                     (value_t){.derive = get_zfs_value(ksp, "l2_misses")},
+                     DS_TYPE_DERIVE, now, &l2_misses_state) == 0)) {
+    za_submit_ratio("L2", l2_hits, l2_misses);
+  }
 
   /* I/O */
   value_t l2_io[] = {