Fixed VolumePerf data collection.
[collectd.git] / src / netapp.c
index 55f449b..f47b036 100644 (file)
 
 #include "collectd.h"
 #include "common.h"
+#include "utils_ignorelist.h"
 
 #include <netapp_api.h>
+#include <netapp_errno.h>
 
 #define HAS_ALL_FLAGS(has,needs) (((has) & (needs)) == (needs))
 
@@ -41,21 +43,8 @@ struct cna_interval_s
 };
 typedef struct cna_interval_s cna_interval_t;
 
-/*!
- * \brief Persistent data for system performance counters
- */
-#define CFG_SYSTEM_CPU  0x01
-#define CFG_SYSTEM_NET  0x02
-#define CFG_SYSTEM_OPS  0x04
-#define CFG_SYSTEM_DISK 0x08
-#define CFG_SYSTEM_ALL  0x0F
-typedef struct {
-       uint32_t flags;
-       cna_interval_t interval;
-       na_elem_t *query;
-} cfg_system_t;
-
-/*!
+/*! Data types for WAFL statistics {{{
+ *
  * \brief Persistent data for WAFL performance counters. (a.k.a. cache performance)
  *
  * The cache counters use old counter values to calculate a hit ratio for each
@@ -100,8 +89,40 @@ typedef struct {
        uint64_t inode_cache_hit;
        uint64_t inode_cache_miss;
 } cfg_wafl_t;
+/* }}} cfg_wafl_t */
+
+/*! Data types for disk statistics {{{
+ *
+ * \brief A disk in the NetApp.
+ *
+ * A disk doesn't have any more information than its name at the moment.
+ * The name includes the "disk_" prefix.
+ */
+#define HAVE_DISK_BUSY   0x10
+#define HAVE_DISK_BASE   0x20
+#define HAVE_DISK_ALL    0x30
+typedef struct disk_s {
+       char *name;
+       uint32_t flags;
+       time_t timestamp;
+       uint64_t disk_busy;
+       uint64_t base_for_disk_busy;
+       double disk_busy_percent;
+       struct disk_s *next;
+} disk_t;
+
+#define CFG_DISK_BUSIEST 0x01
+#define CFG_DISK_ALL     0x01
+typedef struct {
+       uint32_t flags;
+       cna_interval_t interval;
+       na_elem_t *query;
+       disk_t *disks;
+} cfg_disk_t;
+/* }}} cfg_disk_t */
 
-/*!
+/*! Data types for volume performance statistics {{{
+ *
  * \brief Persistent data for volume performance data.
  *
  * The code below uses the difference of the operations and latency counters to
@@ -110,8 +131,8 @@ typedef struct {
  * kept for completeness sake. The "flags" member indicates if each counter is
  * valid or not.
  *
- * The "query_volume_perf_data" function will fill a new struct of this type
- * and pass both, old and new data, to "submit_volume_perf_data". In that
+ * The "cna_handle_volume_perf_data" function will fill a new struct of this
+ * type and pass both, old and new data, to "submit_volume_perf_data". In that
  * function, the per-operation latency is calculated and dispatched, then the
  * old counters are updated.
  */
@@ -127,88 +148,91 @@ typedef struct {
 #define HAVE_VOLUME_PERF_LATENCY_READ  0x0100
 #define HAVE_VOLUME_PERF_LATENCY_WRITE 0x0200
 #define HAVE_VOLUME_PERF_ALL           0x03F0
-typedef struct {
-       uint32_t flags;
-} cfg_volume_perf_t;
-
-typedef struct {
+struct data_volume_perf_s;
+typedef struct data_volume_perf_s data_volume_perf_t;
+struct data_volume_perf_s {
+       char *name;
        uint32_t flags;
        time_t timestamp;
+
        uint64_t read_bytes;
        uint64_t write_bytes;
        uint64_t read_ops;
        uint64_t write_ops;
        uint64_t read_latency;
        uint64_t write_latency;
-} data_volume_perf_t;
 
-/*!
+       data_volume_perf_t *next;
+};
+
+typedef struct {
+       cna_interval_t interval;
+       na_elem_t *query;
+
+       ignorelist_t *il_octets;
+       ignorelist_t *il_operations;
+       ignorelist_t *il_latency;
+
+       data_volume_perf_t *volumes;
+} cfg_volume_perf_t;
+/* }}} data_volume_perf_t */
+
+/*! Data types for volume usage statistics {{{
+ *
  * \brief Configuration struct for volume usage data (free / used).
  */
-#define CFG_VOLUME_USAGE_INIT           0x0001
 #define CFG_VOLUME_USAGE_DF             0x0002
 #define CFG_VOLUME_USAGE_SNAP           0x0004
-#define HAVE_VOLUME_USAGE_SNAP          0x0008
-typedef struct {
+#define CFG_VOLUME_USAGE_ALL            0x0006
+#define HAVE_VOLUME_USAGE_NORM_FREE     0x0010
+#define HAVE_VOLUME_USAGE_NORM_USED     0x0020
+#define HAVE_VOLUME_USAGE_SNAP_RSVD     0x0040
+#define HAVE_VOLUME_USAGE_SNAP_USED     0x0080
+#define HAVE_VOLUME_USAGE_SIS_SAVED     0x0100
+#define HAVE_VOLUME_USAGE_ALL           0x01f0
+struct data_volume_usage_s;
+typedef struct data_volume_usage_s data_volume_usage_t;
+struct data_volume_usage_s {
+       char *name;
        uint32_t flags;
+
+       na_elem_t *snap_query;
+
+       uint64_t norm_free;
+       uint64_t norm_used;
+       uint64_t snap_reserved;
        uint64_t snap_used;
-} cfg_volume_usage_t;
+       uint64_t sis_saved;
+
+       data_volume_usage_t *next;
+};
 
-typedef struct service_config_s {
+typedef struct {
+       cna_interval_t interval;
        na_elem_t *query;
-       service_handler_t *handler;
-       int multiplier;
-       int skip_countdown;
-       int interval;
-       void *data;
-       struct service_config_s *next;
-} cfg_service_t;
-#define SERVICE_INIT {0, 0, 1, 1, 0, 0, 0}
 
-/*!
- * \brief Struct representing a volume.
- *
- * A volume currently has a name and two sets of values:
- *
- *  - Performance data, such as bytes read/written, number of operations
- *    performed and average time per operation.
- *
- *  - Usage data, i. e. amount of used and free space in the volume.
- */
-typedef struct volume_s {
-       char *name;
-       data_volume_perf_t perf_data;
-       cfg_volume_usage_t cfg_volume_usage;
-       struct volume_s *next;
-} volume_t;
+       ignorelist_t *il_capacity;
+       ignorelist_t *il_snapshot;
 
-/*!
- * \brief A disk in the NetApp.
+       data_volume_usage_t *volumes;
+} cfg_volume_usage_t;
+/* }}} cfg_volume_usage_t */
+
+/*! Data types for system statistics {{{
  *
- * A disk doesn't have any more information than its name at the moment.
- * The name includes the "disk_" prefix.
+ * \brief Persistent data for system performance counters
  */
-#define HAVE_DISK_BUSY   0x10
-#define HAVE_DISK_BASE   0x20
-#define HAVE_DISK_ALL    0x30
-typedef struct disk_s {
-       char *name;
-       uint32_t flags;
-       time_t timestamp;
-       uint64_t disk_busy;
-       uint64_t base_for_disk_busy;
-       double disk_busy_percent;
-       struct disk_s *next;
-} disk_t;
-
-#define CFG_DISK_BUSIEST 0x01
-#define CFG_DISK_ALL     0x01
+#define CFG_SYSTEM_CPU  0x01
+#define CFG_SYSTEM_NET  0x02
+#define CFG_SYSTEM_OPS  0x04
+#define CFG_SYSTEM_DISK 0x08
+#define CFG_SYSTEM_ALL  0x0F
 typedef struct {
        uint32_t flags;
        cna_interval_t interval;
        na_elem_t *query;
-       disk_t *disks;
-} cfg_disk_t;
+} cfg_system_t;
+/* }}} cfg_system_t */
 
 struct host_config_s {
        char *name;
@@ -220,16 +244,16 @@ struct host_config_s {
        int interval;
 
        na_server_t *srv;
-       cfg_service_t *services;
-       cfg_disk_t *cfg_disk;
        cfg_wafl_t *cfg_wafl;
+       cfg_disk_t *cfg_disk;
+       cfg_volume_perf_t *cfg_volume_perf;
+       cfg_volume_usage_t *cfg_volume_usage;
        cfg_system_t *cfg_system;
-       volume_t *volumes;
 
        struct host_config_s *next;
 };
 #define HOST_INIT { NULL, NA_SERVER_TRANSPORT_HTTPS, NULL, 0, NULL, NULL, 0, \
-       NULL, NULL, NULL, NULL, \
+       NULL, NULL, NULL, NULL, NULL, NULL, \
        NULL}
 
 static host_config_t *global_host_config;
@@ -239,22 +263,13 @@ static host_config_t *global_host_config;
  *
  * Used to free the various structures above.
  */
-static void free_volume (volume_t *volume) /* {{{ */
-{
-       volume_t *next;
-
-       next = volume->next;
-
-       sfree (volume->name);
-       sfree (volume);
-
-       free_volume (next);
-} /* }}} void free_volume */
-
 static void free_disk (disk_t *disk) /* {{{ */
 {
        disk_t *next;
 
+       if (disk == NULL)
+               return;
+
        next = disk->next;
 
        sfree (disk->name);
@@ -286,33 +301,73 @@ static void free_cfg_disk (cfg_disk_t *cfg_disk) /* {{{ */
        sfree (cfg_disk);
 } /* }}} void free_cfg_disk */
 
-static void free_cfg_system (cfg_system_t *cs) /* {{{ */
+static void free_cfg_volume_perf (cfg_volume_perf_t *cvp) /* {{{ */
 {
-       if (cs == NULL)
+       data_volume_perf_t *data;
+
+       if (cvp == NULL)
                return;
 
-       if (cs->query != NULL)
-               na_elem_free (cs->query);
+       /* Free the ignorelists */
+       ignorelist_free (cvp->il_octets);
+       ignorelist_free (cvp->il_operations);
+       ignorelist_free (cvp->il_latency);
 
-       sfree (cs);
-} /* }}} void free_cfg_system */
+       /* Free the linked list of volumes */
+       data = cvp->volumes;
+       while (data != NULL)
+       {
+               data_volume_perf_t *next = data->next;
+               sfree (data->name);
+               sfree (data);
+               data = next;
+       }
+
+       if (cvp->query != NULL)
+               na_elem_free (cvp->query);
+
+       sfree (cvp);
+} /* }}} void free_cfg_volume_perf */
 
-static void free_cfg_service (cfg_service_t *service) /* {{{ */
+static void free_cfg_volume_usage (cfg_volume_usage_t *cvu) /* {{{ */
 {
-       cfg_service_t *next;
+       data_volume_usage_t *data;
 
-       if (service == NULL)
+       if (cvu == NULL)
                return;
-       
-       next = service->next;
 
-       /* FIXME: Free service->data? */
-       na_elem_free(service->query);
-       
-       sfree (service);
+       /* Free the ignorelists */
+       ignorelist_free (cvu->il_capacity);
+       ignorelist_free (cvu->il_snapshot);
+
+       /* Free the linked list of volumes */
+       data = cvu->volumes;
+       while (data != NULL)
+       {
+               data_volume_usage_t *next = data->next;
+               sfree (data->name);
+               if (data->snap_query != NULL)
+                       na_elem_free(data->snap_query);
+               sfree (data);
+               data = next;
+       }
+
+       if (cvu->query != NULL)
+               na_elem_free (cvu->query);
+
+       sfree (cvu);
+} /* }}} void free_cfg_volume_usage */
+
+static void free_cfg_system (cfg_system_t *cs) /* {{{ */
+{
+       if (cs == NULL)
+               return;
 
-       free_cfg_service (next);
-} /* }}} void free_cfg_service */
+       if (cs->query != NULL)
+               na_elem_free (cs->query);
+
+       sfree (cs);
+} /* }}} void free_cfg_system */
 
 static void free_host_config (host_config_t *hc) /* {{{ */
 {
@@ -328,11 +383,14 @@ static void free_host_config (host_config_t *hc) /* {{{ */
        sfree (hc->username);
        sfree (hc->password);
 
-       free_cfg_service (hc->services);
        free_cfg_disk (hc->cfg_disk);
        free_cfg_wafl (hc->cfg_wafl);
+       free_cfg_volume_perf (hc->cfg_volume_perf);
+       free_cfg_volume_usage (hc->cfg_volume_usage);
        free_cfg_system (hc->cfg_system);
-       free_volume (hc->volumes);
+
+       if (hc->srv != NULL)
+               na_server_close (hc->srv);
 
        sfree (hc);
 
@@ -344,56 +402,6 @@ static void free_host_config (host_config_t *hc) /* {{{ */
  *
  * Used to look up volumes and disks or to handle flags.
  */
-static volume_t *get_volume (host_config_t *host, const char *name, /* {{{ */
-               uint32_t vol_usage_flags, uint32_t vol_perf_flags)
-{
-       volume_t *v;
-
-       if (name == NULL)
-               return (NULL);
-       
-       /* Make sure the default flags include the init-bit. */
-       if (vol_usage_flags != 0)
-               vol_usage_flags |= CFG_VOLUME_USAGE_INIT;
-       if (vol_perf_flags != 0)
-               vol_perf_flags |= CFG_VOLUME_PERF_INIT;
-
-       for (v = host->volumes; v; v = v->next) {
-               if (strcmp(v->name, name) != 0)
-                       continue;
-
-               /* Check if the flags have been initialized. */
-               if (((v->cfg_volume_usage.flags & CFG_VOLUME_USAGE_INIT) == 0)
-                               && (vol_usage_flags != 0))
-                       v->cfg_volume_usage.flags = vol_usage_flags;
-               if (((v->perf_data.flags & CFG_VOLUME_PERF_INIT) == 0)
-                               && (vol_perf_flags != 0))
-                       v->perf_data.flags = vol_perf_flags;
-
-               return v;
-       }
-
-       DEBUG ("netapp plugin: Allocating new entry for volume %s.", name);
-       v = malloc(sizeof(*v));
-       if (v == NULL)
-               return (NULL);
-       memset (v, 0, sizeof (*v));
-
-       v->cfg_volume_usage.flags = vol_usage_flags;
-       v->perf_data.flags = vol_perf_flags;
-
-       v->name = strdup(name);
-       if (v->name == NULL) {
-               sfree (v);
-               return (NULL);
-       }
-
-       v->next = host->volumes;
-       host->volumes = v;
-
-       return v;
-} /* }}} volume_t *get_volume */
-
 static disk_t *get_disk(cfg_disk_t *cd, const char *name) /* {{{ */
 {
        disk_t *d;
@@ -424,30 +432,133 @@ static disk_t *get_disk(cfg_disk_t *cd, const char *name) /* {{{ */
        return d;
 } /* }}} disk_t *get_disk */
 
-static void host_set_all_perf_data_flags(const host_config_t *host, /* {{{ */
-               uint32_t flag, _Bool set)
+static data_volume_usage_t *get_volume_usage (cfg_volume_usage_t *cvu, /* {{{ */
+               const char *name)
 {
-       volume_t *v;
-       
-       for (v = host->volumes; v; v = v->next) {
-               if (set)
-                       v->perf_data.flags |= flag;
-               else /* if (!set) */
-                       v->perf_data.flags &= ~flag;
+       data_volume_usage_t *last;
+       data_volume_usage_t *new;
+
+       int ignore_capacity = 0;
+       int ignore_snapshot = 0;
+
+       if ((cvu == NULL) || (name == NULL))
+               return (NULL);
+
+       last = cvu->volumes;
+       while (last != NULL)
+       {
+               if (strcmp (last->name, name) == 0)
+                       return (last);
+
+               if (last->next == NULL)
+                       break;
+
+               last = last->next;
        }
-} /* }}} void host_set_all_perf_data_flags */
 
-static void host_set_all_cfg_volume_usage_flags(const host_config_t *host, /* {{{ */
-               uint32_t flag, _Bool set) {
-       volume_t *v;
-       
-       for (v = host->volumes; v; v = v->next) {
-               if (set)
-                       v->cfg_volume_usage.flags |= flag;
-               else /* if (!set) */
-                       v->cfg_volume_usage.flags &= ~flag;
+       /* Check the ignorelists. If *both* tell us to ignore a volume, return NULL. */
+       ignore_capacity = ignorelist_match (cvu->il_capacity, name);
+       ignore_snapshot = ignorelist_match (cvu->il_snapshot, name);
+       if ((ignore_capacity != 0) && (ignore_snapshot != 0))
+               return (NULL);
+
+       /* Not found: allocate. */
+       new = malloc (sizeof (*new));
+       if (new == NULL)
+               return (NULL);
+       memset (new, 0, sizeof (*new));
+       new->next = NULL;
+
+       new->name = strdup (name);
+       if (new->name == NULL)
+       {
+               sfree (new);
+               return (NULL);
+       }
+
+       if (ignore_capacity == 0)
+               new->flags |= CFG_VOLUME_USAGE_DF;
+       if (ignore_snapshot == 0) {
+               new->flags |= CFG_VOLUME_USAGE_SNAP;
+               new->snap_query = na_elem_new ("snapshot-list-info");
+               na_child_add_string(new->snap_query, "target-type", "volume");
+               na_child_add_string(new->snap_query, "target-name", name);
+       } else {
+               new->snap_query = NULL;
+       }
+
+       /* Add to end of list. */
+       if (last == NULL)
+               cvu->volumes = new;
+       else
+               last->next = new;
+
+       return (new);
+} /* }}} data_volume_usage_t *get_volume_usage */
+
+static data_volume_perf_t *get_volume_perf (cfg_volume_perf_t *cvp, /* {{{ */
+               const char *name)
+{
+       data_volume_perf_t *last;
+       data_volume_perf_t *new;
+
+       int ignore_octets = 0;
+       int ignore_operations = 0;
+       int ignore_latency = 0;
+
+       if ((cvp == NULL) || (name == NULL))
+               return (NULL);
+
+       last = cvp->volumes;
+       while (last != NULL)
+       {
+               if (strcmp (last->name, name) == 0)
+                       return (last);
+
+               if (last->next == NULL)
+                       break;
+
+               last = last->next;
        }
-} /* }}} void host_set_all_cfg_volume_usage_flags */
+
+       /* Check the ignorelists. If *all three* tell us to ignore a volume, return
+        * NULL. */
+       ignore_octets = ignorelist_match (cvp->il_octets, name);
+       ignore_operations = ignorelist_match (cvp->il_operations, name);
+       ignore_latency = ignorelist_match (cvp->il_latency, name);
+       if ((ignore_octets != 0) || (ignore_operations != 0)
+                       || (ignore_latency != 0))
+               return (NULL);
+
+       /* Not found: allocate. */
+       new = malloc (sizeof (*new));
+       if (new == NULL)
+               return (NULL);
+       memset (new, 0, sizeof (*new));
+       new->next = NULL;
+
+       new->name = strdup (name);
+       if (new->name == NULL)
+       {
+               sfree (new);
+               return (NULL);
+       }
+
+       if (ignore_octets == 0)
+               new->flags |= CFG_VOLUME_PERF_IO;
+       if (ignore_operations == 0)
+               new->flags |= CFG_VOLUME_PERF_OPS;
+       if (ignore_latency == 0)
+               new->flags |= CFG_VOLUME_PERF_LATENCY;
+
+       /* Add to end of list. */
+       if (last == NULL)
+               cvp->volumes = new;
+       else
+               last->next = new;
+
+       return (new);
+} /* }}} data_volume_perf_t *get_volume_perf */
 
 /*
  * Various submit functions.
@@ -615,28 +726,28 @@ static int submit_wafl_data (const char *hostname, const char *instance, /* {{{
 
 /* Submits volume performance data to the daemon, taking care to honor and
  * update flags appropriately. */
-static int submit_volume_perf_data (const host_config_t *host, /* {{{ */
-               volume_t *volume,
+static int submit_volume_perf_data (const char *hostname, /* {{{ */
+               data_volume_perf_t *old_data,
                const data_volume_perf_t *new_data)
 {
        /* Check for and submit disk-octet values */
-       if (HAS_ALL_FLAGS (volume->perf_data.flags, CFG_VOLUME_PERF_IO)
+       if (HAS_ALL_FLAGS (old_data->flags, CFG_VOLUME_PERF_IO)
                        && HAS_ALL_FLAGS (new_data->flags, HAVE_VOLUME_PERF_BYTES_READ | HAVE_VOLUME_PERF_BYTES_WRITE))
        {
-               submit_two_counters (host->name, volume->name, "disk_octets", /* type instance = */ NULL,
+               submit_two_counters (hostname, old_data->name, "disk_octets", /* type instance = */ NULL,
                                (counter_t) new_data->read_bytes, (counter_t) new_data->write_bytes, new_data->timestamp);
        }
 
        /* Check for and submit disk-operations values */
-       if (HAS_ALL_FLAGS (volume->perf_data.flags, CFG_VOLUME_PERF_OPS)
+       if (HAS_ALL_FLAGS (old_data->flags, CFG_VOLUME_PERF_OPS)
                        && HAS_ALL_FLAGS (new_data->flags, HAVE_VOLUME_PERF_OPS_READ | HAVE_VOLUME_PERF_OPS_WRITE))
        {
-               submit_two_counters (host->name, volume->name, "disk_ops", /* type instance = */ NULL,
+               submit_two_counters (hostname, old_data->name, "disk_ops", /* type instance = */ NULL,
                                (counter_t) new_data->read_ops, (counter_t) new_data->write_ops, new_data->timestamp);
        }
 
        /* Check for, calculate and submit disk-latency values */
-       if (HAS_ALL_FLAGS (volume->perf_data.flags, CFG_VOLUME_PERF_LATENCY
+       if (HAS_ALL_FLAGS (old_data->flags, CFG_VOLUME_PERF_LATENCY
                                | HAVE_VOLUME_PERF_OPS_READ | HAVE_VOLUME_PERF_OPS_WRITE
                                | HAVE_VOLUME_PERF_LATENCY_READ | HAVE_VOLUME_PERF_LATENCY_WRITE)
                        && HAS_ALL_FLAGS (new_data->flags, HAVE_VOLUME_PERF_OPS_READ | HAVE_VOLUME_PERF_OPS_WRITE
@@ -649,50 +760,50 @@ static int submit_volume_perf_data (const host_config_t *host, /* {{{ */
                latency_per_op_write = NAN;
 
                /* Check if a counter wrapped around. */
-               if ((new_data->read_ops > volume->perf_data.read_ops)
-                               && (new_data->read_latency > volume->perf_data.read_latency))
+               if ((new_data->read_ops > old_data->read_ops)
+                               && (new_data->read_latency > old_data->read_latency))
                {
                        uint64_t diff_ops_read;
                        uint64_t diff_latency_read;
 
-                       diff_ops_read = new_data->read_ops - volume->perf_data.read_ops;
-                       diff_latency_read = new_data->read_latency - volume->perf_data.read_latency;
+                       diff_ops_read = new_data->read_ops - old_data->read_ops;
+                       diff_latency_read = new_data->read_latency - old_data->read_latency;
 
                        if (diff_ops_read > 0)
                                latency_per_op_read = ((gauge_t) diff_latency_read) / ((gauge_t) diff_ops_read);
                }
 
-               if ((new_data->write_ops > volume->perf_data.write_ops)
-                               && (new_data->write_latency > volume->perf_data.write_latency))
+               if ((new_data->write_ops > old_data->write_ops)
+                               && (new_data->write_latency > old_data->write_latency))
                {
                        uint64_t diff_ops_write;
                        uint64_t diff_latency_write;
 
-                       diff_ops_write = new_data->write_ops - volume->perf_data.write_ops;
-                       diff_latency_write = new_data->write_latency - volume->perf_data.write_latency;
+                       diff_ops_write = new_data->write_ops - old_data->write_ops;
+                       diff_latency_write = new_data->write_latency - old_data->write_latency;
 
                        if (diff_ops_write > 0)
                                latency_per_op_write = ((gauge_t) diff_latency_write) / ((gauge_t) diff_ops_write);
                }
 
-               submit_two_gauge (host->name, volume->name, "disk_latency", /* type instance = */ NULL,
+               submit_two_gauge (hostname, old_data->name, "disk_latency", /* type instance = */ NULL,
                                latency_per_op_read, latency_per_op_write, new_data->timestamp);
        }
 
        /* Clear all HAVE_* flags. */
-       volume->perf_data.flags &= ~HAVE_VOLUME_PERF_ALL;
+       old_data->flags &= ~HAVE_VOLUME_PERF_ALL;
 
        /* Copy all counters */
-       volume->perf_data.timestamp = new_data->timestamp;
-       volume->perf_data.read_bytes = new_data->read_bytes;
-       volume->perf_data.write_bytes = new_data->write_bytes;
-       volume->perf_data.read_ops = new_data->read_ops;
-       volume->perf_data.write_ops = new_data->write_ops;
-       volume->perf_data.read_latency = new_data->read_latency;
-       volume->perf_data.write_latency = new_data->write_latency;
+       old_data->timestamp = new_data->timestamp;
+       old_data->read_bytes = new_data->read_bytes;
+       old_data->write_bytes = new_data->write_bytes;
+       old_data->read_ops = new_data->read_ops;
+       old_data->write_ops = new_data->write_ops;
+       old_data->read_latency = new_data->read_latency;
+       old_data->write_latency = new_data->write_latency;
 
        /* Copy the HAVE_* flags */
-       volume->perf_data.flags |= (new_data->flags & HAVE_VOLUME_PERF_ALL);
+       old_data->flags |= (new_data->flags & HAVE_VOLUME_PERF_ALL);
 
        return (0);
 } /* }}} int submit_volume_perf_data */
@@ -1058,146 +1169,68 @@ static int cna_query_disk (host_config_t *host) /* {{{ */
        return (status);
 } /* }}} int cna_query_disk */
 
-/* Data corresponding to <GetVolumeData /> */
-static void collect_volume_data(host_config_t *host, na_elem_t *out, void *data) { /* {{{ */
-       na_elem_t *inst;
-       volume_t *volume;
-       cfg_volume_usage_t *cfg_volume_data = data;
-
-       out = na_elem_child(out, "volumes");
-       na_elem_iter_t inst_iter = na_child_iterator(out);
-       for (inst = na_iterator_next(&inst_iter); inst; inst = na_iterator_next(&inst_iter)) {
-               uint64_t size_free = 0, size_used = 0, snap_reserved = 0;
+/* Data corresponding to <VolumePerf /> */
+static int cna_handle_volume_perf_data (const char *hostname, /* {{{ */
+               cfg_volume_perf_t *cvp, na_elem_t *data)
+{
+       time_t timestamp;
+       na_elem_t *elem_instances;
+       na_elem_iter_t iter_instances;
+       na_elem_t *elem_instance;
+       
+       timestamp = (time_t) na_child_get_uint64(data, "timestamp", 0);
 
-               na_elem_t *sis;
-               const char *sis_state;
-               uint64_t sis_saved_reported;
-               uint64_t sis_saved;
+       elem_instances = na_elem_child(data, "instances");
+       if (elem_instances == NULL)
+       {
+               ERROR ("netapp plugin: handle_volume_perf_data: "
+                               "na_elem_child (\"instances\") failed.");
+               return (-1);
+       }
 
-               volume = get_volume(host, na_child_get_string(inst, "name"),
-                               cfg_volume_data->flags, /* perf_flags = */ 0);
-               if (volume == NULL)
-                       continue;
+       iter_instances = na_child_iterator (elem_instances);
+       for (elem_instance = na_iterator_next(&iter_instances);
+                       elem_instance != NULL;
+                       elem_instance = na_iterator_next(&iter_instances))
+       {
+               const char *name;
 
-               if (!(volume->cfg_volume_usage.flags & CFG_VOLUME_USAGE_DF))
-                       continue;
+               data_volume_perf_t perf_data;
+               data_volume_perf_t *v;
 
-               /* 2^4 exa-bytes? This will take a while ;) */
-               size_free = na_child_get_uint64(inst, "size-available", UINT64_MAX);
-               if (size_free != UINT64_MAX)
-                       submit_double (host->name, volume->name, "df_complex", "free",
-                                       (double) size_free, /* time = */ 0);
-
-               size_used = na_child_get_uint64(inst, "size-used", UINT64_MAX);
-               if (size_used != UINT64_MAX) {
-                       if ((volume->cfg_volume_usage.flags & HAVE_VOLUME_USAGE_SNAP)
-                                       && (size_used >= volume->cfg_volume_usage.snap_used))
-                               size_used -= volume->cfg_volume_usage.snap_used;
-                       submit_double (host->name, volume->name, "df_complex", "used",
-                                       (double) size_used, /* time = */ 0);
-               }
+               na_elem_t *elem_counters;
+               na_elem_iter_t iter_counters;
+               na_elem_t *elem_counter;
 
-               snap_reserved = na_child_get_uint64(inst, "snapshot-blocks-reserved", UINT64_MAX);
-               if (!(volume->cfg_volume_usage.flags & HAVE_VOLUME_USAGE_SNAP) && (snap_reserved != UINT64_MAX))
-                       /* If we have snap usage data this value has already been submitted. */
-                       /* 1 block == 1024 bytes  as per API docs */
-                       submit_double (host->name, volume->name, "df_complex", "snap_reserved",
-                                       (double) (1024 * snap_reserved), /* time = */ 0);
+               memset (&perf_data, 0, sizeof (perf_data));
+               perf_data.timestamp = timestamp;
 
-               sis = na_elem_child(inst, "sis");
-               if (sis == NULL)
+               name = na_child_get_string (elem_instance, "name");
+               if (name == NULL)
                        continue;
 
-               sis_state = na_child_get_string(sis, "state");
-               if ((sis_state == NULL)
-                               || (strcmp ("enabled", sis_state) != 0))
+               /* get_volume_perf may return NULL if this volume is to be ignored. */
+               v = get_volume_perf (cvp, name);
+               if (v == NULL)
                        continue;
 
-               sis_saved_reported = na_child_get_uint64(sis, "size-saved", UINT64_MAX);
-               if (sis_saved_reported == UINT64_MAX)
+               elem_counters = na_elem_child (elem_instance, "counters");
+               if (elem_counters == NULL)
                        continue;
 
-               /* size-saved is actually a 32 bit number, so ... time for some guesswork. */
-               if ((sis_saved_reported >> 32) != 0) {
-                       /* In case they ever fix this bug. */
-                       sis_saved = sis_saved_reported;
-               } else {
-                       uint64_t sis_saved_percent;
-                       uint64_t sis_saved_guess;
-                       uint64_t overflow_guess;
-                       uint64_t guess1, guess2, guess3;
+               iter_counters = na_child_iterator (elem_counters);
+               for (elem_counter = na_iterator_next(&iter_counters);
+                               elem_counter != NULL;
+                               elem_counter = na_iterator_next(&iter_counters))
+               {
+                       const char *name;
+                       uint64_t value;
 
-                       sis_saved_percent = na_child_get_uint64(sis, "percentage-saved", UINT64_MAX);
-                       if (sis_saved_percent > 100)
+                       name = na_child_get_string (elem_counter, "name");
+                       if (name == NULL)
                                continue;
 
-                       /* The "size-saved" value is a 32bit unsigned integer. This is a bug and
-                        * will hopefully be fixed in later versions. To work around the bug, try
-                        * to figure out how often the 32bit integer wrapped around by using the
-                        * "percentage-saved" value. Because the percentage is in the range
-                        * [0-100], this should work as long as the saved space does not exceed
-                        * 400 GBytes. */
-                       /* percentage-saved = size-saved / (size-saved + size-used) */
-                       if (sis_saved_percent < 100)
-                               sis_saved_guess = size_used * sis_saved_percent / (100 - sis_saved_percent);
-                       else
-                               sis_saved_guess = size_used;
-
-                       overflow_guess = sis_saved_guess >> 32;
-                       guess1 = overflow_guess ? ((overflow_guess - 1) << 32) + sis_saved_reported : sis_saved_reported;
-                       guess2 = (overflow_guess << 32) + sis_saved_reported;
-                       guess3 = ((overflow_guess + 1) << 32) + sis_saved_reported;
-
-                       if (sis_saved_guess < guess2) {
-                               if ((sis_saved_guess - guess1) < (guess2 - sis_saved_guess))
-                                       sis_saved = guess1;
-                               else
-                                       sis_saved = guess2;
-                       } else {
-                               if ((sis_saved_guess - guess2) < (guess3 - sis_saved_guess))
-                                       sis_saved = guess2;
-                               else
-                                       sis_saved = guess3;
-                       }
-               } /* end of 32-bit workaround */
-
-               submit_double (host->name, volume->name, "df_complex", "sis_saved",
-                               (double) sis_saved, /* time = */ 0);
-       }
-} /* }}} void collect_volume_data */
-
-/* Data corresponding to <GetVolumePerfData /> */
-static void query_volume_perf_data(host_config_t *host, na_elem_t *out, void *data) { /* {{{ */
-       cfg_volume_perf_t *cfg_volume_perf = data;
-       time_t timestamp;
-       na_elem_t *counter, *inst;
-       
-       timestamp = (time_t) na_child_get_uint64(out, "timestamp", 0);
-
-       out = na_elem_child(out, "instances");
-       na_elem_iter_t inst_iter = na_child_iterator(out);
-       for (inst = na_iterator_next(&inst_iter); inst; inst = na_iterator_next(&inst_iter)) {
-               data_volume_perf_t perf_data;
-               volume_t *volume;
-
-               memset (&perf_data, 0, sizeof (perf_data));
-               perf_data.timestamp = timestamp;
-
-               volume = get_volume(host, na_child_get_string(inst, "name"),
-                               /* data_flags = */ 0, cfg_volume_perf->flags);
-               if (volume == NULL)
-                       continue;
-
-               na_elem_iter_t count_iter = na_child_iterator(na_elem_child(inst, "counters"));
-               for (counter = na_iterator_next(&count_iter); counter; counter = na_iterator_next(&count_iter)) {
-                       const char *name;
-                       uint64_t value;
-
-                       name = na_child_get_string(counter, "name");
-                       if (name == NULL)
-                               continue;
-
-                       value = na_child_get_uint64(counter, "value", UINT64_MAX);
+                       value = na_child_get_uint64 (elem_counter, "value", UINT64_MAX);
                        if (value == UINT64_MAX)
                                continue;
 
@@ -1220,11 +1253,399 @@ static void query_volume_perf_data(host_config_t *host, na_elem_t *out, void *da
                                perf_data.write_latency = value;
                                perf_data.flags |= HAVE_VOLUME_PERF_LATENCY_WRITE;
                        }
-               }
+               } /* for (elem_counter) */
 
-               submit_volume_perf_data (host, volume, &perf_data);
+               submit_volume_perf_data (hostname, v, &perf_data);
        } /* for (volume) */
-} /* }}} void query_volume_perf_data */
+
+       return (0);
+} /* }}} int cna_handle_volume_perf_data */
+
+static int cna_setup_volume_perf (cfg_volume_perf_t *cd) /* {{{ */
+{
+       na_elem_t *e;
+
+       if (cd == NULL)
+               return (EINVAL);
+
+       if (cd->query != NULL)
+               return (0);
+
+       cd->query = na_elem_new ("perf-object-get-instances");
+       if (cd->query == NULL)
+       {
+               ERROR ("netapp plugin: na_elem_new failed.");
+               return (-1);
+       }
+       na_child_add_string (cd->query, "objectname", "volume");
+
+       e = na_elem_new("counters");
+       if (e == NULL)
+       {
+               na_elem_free (cd->query);
+               cd->query = NULL;
+               ERROR ("netapp plugin: na_elem_new failed.");
+               return (-1);
+       }
+       /* "foo" means: This string has to be here but the content doesn't matter. */
+       na_child_add_string(e, "foo", "read_ops");
+       na_child_add_string(e, "foo", "write_ops");
+       na_child_add_string(e, "foo", "read_data");
+       na_child_add_string(e, "foo", "write_data");
+       na_child_add_string(e, "foo", "read_latency");
+       na_child_add_string(e, "foo", "write_latency");
+       na_child_add(cd->query, e);
+
+       return (0);
+} /* }}} int cna_setup_volume_perf */
+
+static int cna_query_volume_perf (host_config_t *host) /* {{{ */
+{
+       na_elem_t *data;
+       int status;
+       time_t now;
+
+       if (host == NULL)
+               return (EINVAL);
+
+       /* If the user did not configure volume performance statistics, return
+        * without doing anything. */
+       if (host->cfg_volume_perf == NULL)
+               return (0);
+
+       now = time (NULL);
+       if ((host->cfg_volume_perf->interval.interval + host->cfg_volume_perf->interval.last_read) > now)
+               return (0);
+
+       status = cna_setup_volume_perf (host->cfg_volume_perf);
+       if (status != 0)
+               return (status);
+       assert (host->cfg_volume_perf->query != NULL);
+
+       data = na_server_invoke_elem (host->srv, host->cfg_volume_perf->query);
+       if (na_results_status (data) != NA_OK)
+       {
+               ERROR ("netapp plugin: cna_query_volume_perf: na_server_invoke_elem failed: %s",
+                               na_results_reason (data));
+               na_elem_free (data);
+               return (-1);
+       }
+
+       status = cna_handle_volume_perf_data (host->name, host->cfg_volume_perf, data);
+
+       if (status == 0)
+               host->cfg_volume_perf->interval.last_read = now;
+
+       na_elem_free (data);
+       return (status);
+} /* }}} int cna_query_volume_perf */
+
+/* Data corresponding to <VolumeUsage /> */
+static int cna_submit_volume_usage_data (const char *hostname, /* {{{ */
+               cfg_volume_usage_t *cfg_volume)
+{
+       data_volume_usage_t *v;
+
+       for (v = cfg_volume->volumes; v != NULL; v = v->next)
+       {
+               uint64_t norm_used = v->norm_used;
+               uint64_t norm_free = v->norm_free;
+               uint64_t sis_saved = v->sis_saved;
+               uint64_t snap_reserve_used = 0;
+               uint64_t snap_reserve_free = v->snap_reserved;
+               uint64_t snap_norm_used = v->snap_used;
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_SNAP_USED | HAVE_VOLUME_USAGE_SNAP_RSVD)) {
+                       if (v->snap_reserved > v->snap_used) {
+                               snap_reserve_free = v->snap_reserved - v->snap_used;
+                               snap_reserve_used = v->snap_used;
+                               snap_norm_used = 0;
+                       } else {
+                               snap_reserve_free = 0;
+                               snap_reserve_used = v->snap_reserved;
+                               snap_norm_used = v->snap_used - v->snap_reserved;
+                               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_NORM_USED)
+                                               && (norm_used >= snap_norm_used))
+                                       norm_used -= snap_norm_used;
+                       }
+               }
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_NORM_FREE))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "free",
+                                       (double) norm_free, /* timestamp = */ 0);
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_SIS_SAVED))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "sis_saved",
+                                       (double) sis_saved, /* timestamp = */ 0);
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_NORM_USED))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "used",
+                                       (double) norm_used, /* timestamp = */ 0);
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_SNAP_RSVD))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "snap_reserved",
+                                       (double) snap_reserve_free, /* timestamp = */ 0);
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_SNAP_USED | HAVE_VOLUME_USAGE_SNAP_RSVD))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "snap_reserve_used",
+                                       (double) snap_reserve_used, /* timestamp = */ 0);
+
+               if (HAS_ALL_FLAGS (v->flags, HAVE_VOLUME_USAGE_SNAP_USED))
+                       submit_double (hostname, /* plugin instance = */ v->name,
+                                       "df_complex", "snap_normal_used",
+                                       (double) snap_norm_used, /* timestamp = */ 0);
+
+               /* Clear all the HAVE_* flags */
+               v->flags &= ~HAVE_VOLUME_USAGE_ALL;
+       } /* for (v = cfg_volume->volumes) */
+
+       return (0);
+} /* }}} int cna_submit_volume_usage_data */
+
+static void cna_handle_volume_snap_usage(const host_config_t *host, data_volume_usage_t *v)
+{
+       uint64_t snap_used = 0, value;
+       na_elem_t *data, *elem_snap, *elem_snapshots;
+       na_elem_iter_t iter_snap;
+
+       data = na_server_invoke_elem(host->srv, v->snap_query);
+       if (na_results_status(data) != NA_OK)
+       {
+               if (na_results_errno(data) != EVOLUMEOFFLINE)
+                       ERROR ("netapp plugin: cna_handle_volume_snap_usage: na_server_invoke_elem for "
+                                       "volume \"%s\" failed with error %d: %s", v->name,
+                                       na_results_errno(data), na_results_reason(data));
+               na_elem_free(data);
+               return;
+       }
+
+       elem_snapshots = na_elem_child (data, "snapshots");
+       if (elem_snapshots == NULL)
+       {
+               ERROR ("netapp plugin: cna_handle_volume_snap_usage: "
+                               "na_elem_child (\"snapshots\") failed.");
+               na_elem_free(data);
+               return;
+       }
+
+       iter_snap = na_child_iterator (elem_snapshots);
+       for (elem_snap = na_iterator_next (&iter_snap);
+                       elem_snap != NULL;
+                       elem_snap = na_iterator_next (&iter_snap))
+       {
+               value = na_child_get_uint64(elem_snap, "cumulative-total", 0);
+               if (value > snap_used)
+                       snap_used = value;
+       }
+       na_elem_free (data);
+       /* snap_used is the total size of the oldest snapshot plus all
+        * newer ones in blocks (1KB). */
+       v->snap_used = snap_used * 1024;
+       v->flags |= HAVE_VOLUME_USAGE_SNAP_USED;
+}
+
+static int cna_handle_volume_usage_data (const host_config_t *host, /* {{{ */
+               cfg_volume_usage_t *cfg_volume, na_elem_t *data)
+{
+       na_elem_t *elem_volume;
+       na_elem_t *elem_volumes;
+       na_elem_iter_t iter_volume;
+
+       elem_volumes = na_elem_child (data, "volumes");
+       if (elem_volumes == NULL)
+       {
+               ERROR ("netapp plugin: cna_handle_volume_usage_data: "
+                               "na_elem_child (\"volumes\") failed.");
+               return (-1);
+       }
+
+       iter_volume = na_child_iterator (elem_volumes);
+       for (elem_volume = na_iterator_next (&iter_volume);
+                       elem_volume != NULL;
+                       elem_volume = na_iterator_next (&iter_volume))
+       {
+               const char *volume_name, *state;
+
+               data_volume_usage_t *v;
+               uint64_t value;
+
+               na_elem_t *sis;
+               const char *sis_state;
+               uint64_t sis_saved_reported;
+
+               volume_name = na_child_get_string (elem_volume, "name");
+               if (volume_name == NULL)
+                       continue;
+
+               state = na_child_get_string (elem_volume, "state");
+               if ((state == NULL) || (strcmp(state, "online") != 0))
+                       continue;
+
+               /* get_volume_usage may return NULL if the volume is to be ignored. */
+               v = get_volume_usage (cfg_volume, volume_name);
+               if (v == NULL)
+                       continue;
+
+               if ((v->flags & CFG_VOLUME_USAGE_SNAP) != 0)
+                       cna_handle_volume_snap_usage(host, v);
+               
+               if ((v->flags & CFG_VOLUME_USAGE_DF) == 0)
+                       continue;
+
+               /* 2^4 exa-bytes? This will take a while ;) */
+               value = na_child_get_uint64(elem_volume, "size-available", UINT64_MAX);
+               if (value != UINT64_MAX) {
+                       v->norm_free = value;
+                       v->flags |= HAVE_VOLUME_USAGE_NORM_FREE;
+               }
+
+               value = na_child_get_uint64(elem_volume, "size-used", UINT64_MAX);
+               if (value != UINT64_MAX) {
+                       v->norm_used = value;
+                       v->flags |= HAVE_VOLUME_USAGE_NORM_USED;
+               }
+
+               value = na_child_get_uint64(elem_volume, "snapshot-blocks-reserved", UINT64_MAX);
+               if (value != UINT64_MAX) {
+                       /* 1 block == 1024 bytes  as per API docs */
+                       v->snap_reserved = 1024 * value;
+                       v->flags |= HAVE_VOLUME_USAGE_SNAP_RSVD;
+               }
+
+               sis = na_elem_child(elem_volume, "sis");
+               if (sis == NULL)
+                       continue;
+
+               sis_state = na_child_get_string(sis, "state");
+               if (sis_state == NULL)
+                       continue;
+
+               /* If SIS is not enabled, there's nothing left to do for this volume. */
+               if (strcmp ("enabled", sis_state) != 0)
+                       continue;
+
+               sis_saved_reported = na_child_get_uint64(sis, "size-saved", UINT64_MAX);
+               if (sis_saved_reported == UINT64_MAX)
+                       continue;
+
+               /* size-saved is actually a 32 bit number, so ... time for some guesswork. */
+               if ((sis_saved_reported >> 32) != 0) {
+                       /* In case they ever fix this bug. */
+                       v->sis_saved = sis_saved_reported;
+                       v->flags |= HAVE_VOLUME_USAGE_SIS_SAVED;
+               } else { /* really hacky work-around code. {{{ */
+                       uint64_t sis_saved_percent;
+                       uint64_t sis_saved_guess;
+                       uint64_t overflow_guess;
+                       uint64_t guess1, guess2, guess3;
+
+                       /* Check if we have v->norm_used. Without it, we cannot calculate
+                        * sis_saved_guess. */
+                       if ((v->flags & HAVE_VOLUME_USAGE_NORM_USED) == 0)
+                               continue;
+
+                       sis_saved_percent = na_child_get_uint64(sis, "percentage-saved", UINT64_MAX);
+                       if (sis_saved_percent > 100)
+                               continue;
+
+                       /* The "size-saved" value is a 32bit unsigned integer. This is a bug and
+                        * will hopefully be fixed in later versions. To work around the bug, try
+                        * to figure out how often the 32bit integer wrapped around by using the
+                        * "percentage-saved" value. Because the percentage is in the range
+                        * [0-100], this should work as long as the saved space does not exceed
+                        * 400 GBytes. */
+                       /* percentage-saved = size-saved / (size-saved + size-used) */
+                       if (sis_saved_percent < 100)
+                               sis_saved_guess = v->norm_used * sis_saved_percent / (100 - sis_saved_percent);
+                       else
+                               sis_saved_guess = v->norm_used;
+
+                       overflow_guess = sis_saved_guess >> 32;
+                       guess1 = overflow_guess ? ((overflow_guess - 1) << 32) + sis_saved_reported : sis_saved_reported;
+                       guess2 = (overflow_guess << 32) + sis_saved_reported;
+                       guess3 = ((overflow_guess + 1) << 32) + sis_saved_reported;
+
+                       if (sis_saved_guess < guess2) {
+                               if ((sis_saved_guess - guess1) < (guess2 - sis_saved_guess))
+                                       v->sis_saved = guess1;
+                               else
+                                       v->sis_saved = guess2;
+                       } else {
+                               if ((sis_saved_guess - guess2) < (guess3 - sis_saved_guess))
+                                       v->sis_saved = guess2;
+                               else
+                                       v->sis_saved = guess3;
+                       }
+                       v->flags |= HAVE_VOLUME_USAGE_SIS_SAVED;
+               } /* }}} end of 32-bit workaround */
+       } /* for (elem_volume) */
+
+       return (cna_submit_volume_usage_data (host->name, cfg_volume));
+} /* }}} int cna_handle_volume_usage_data */
+
+static int cna_setup_volume_usage (cfg_volume_usage_t *cvu) /* {{{ */
+{
+       if (cvu == NULL)
+               return (EINVAL);
+
+       if (cvu->query != NULL)
+               return (0);
+
+       cvu->query = na_elem_new ("volume-list-info");
+       if (cvu->query == NULL)
+       {
+               ERROR ("netapp plugin: na_elem_new failed.");
+               return (-1);
+       }
+
+       return (0);
+} /* }}} int cna_setup_volume_usage */
+
+static int cna_query_volume_usage (host_config_t *host) /* {{{ */
+{
+       na_elem_t *data;
+       int status;
+       time_t now;
+
+       if (host == NULL)
+               return (EINVAL);
+
+       /* If the user did not configure volume_usage statistics, return without
+        * doing anything. */
+       if (host->cfg_volume_usage == NULL)
+               return (0);
+
+       now = time (NULL);
+       if ((host->cfg_volume_usage->interval.interval + host->cfg_volume_usage->interval.last_read) > now)
+               return (0);
+
+       status = cna_setup_volume_usage (host->cfg_volume_usage);
+       if (status != 0)
+               return (status);
+       assert (host->cfg_volume_usage->query != NULL);
+
+       data = na_server_invoke_elem(host->srv, host->cfg_volume_usage->query);
+       if (na_results_status (data) != NA_OK)
+       {
+               ERROR ("netapp plugin: cna_query_volume_usage: na_server_invoke_elem failed: %s",
+                               na_results_reason (data));
+               na_elem_free (data);
+               return (-1);
+       }
+
+       status = cna_handle_volume_usage_data (host, host->cfg_volume_usage, data);
+
+       if (status == 0)
+               host->cfg_volume_usage->interval.last_read = now;
+
+       na_elem_free (data);
+       return (status);
+} /* }}} int cna_query_volume_usage */
 
 /* Data corresponding to <System /> */
 static int cna_handle_system_data (const char *hostname, /* {{{ */
@@ -1409,34 +1830,6 @@ static int cna_config_bool_to_flag (const oconfig_item_t *ci, /* {{{ */
        return (0);
 } /* }}} int cna_config_bool_to_flag */
 
-/* Handling of the "Multiplier" option which is allowed in every block. */
-static int cna_config_get_multiplier (const oconfig_item_t *ci, /* {{{ */
-               cfg_service_t *service)
-{
-       int tmp;
-
-       if ((ci == NULL) || (service == NULL))
-               return (EINVAL);
-
-       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
-       {
-               WARNING ("netapp plugin: The `Multiplier' option needs exactly one numeric argument.");
-               return (-1);
-       }
-
-       tmp = (int) (ci->values[0].value.number + .5);
-       if (tmp < 1)
-       {
-               WARNING ("netapp plugin: The `Multiplier' option needs a positive integer argument.");
-               return (-1);
-       }
-
-       service->multiplier = tmp;
-       service->skip_countdown = tmp;
-
-       return (0);
-} /* }}} int cna_config_get_multiplier */
-
 /* Handling of the "Interval" option which is allowed in every block. */
 static int cna_config_get_interval (const oconfig_item_t *ci, /* {{{ */
                cna_interval_t *out_interval)
@@ -1448,14 +1841,14 @@ static int cna_config_get_interval (const oconfig_item_t *ci, /* {{{ */
 
        if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
        {
-               WARNING ("netapp plugin: The `Multiplier' option needs exactly one numeric argument.");
+               WARNING ("netapp plugin: The `Interval' option needs exactly one numeric argument.");
                return (-1);
        }
 
        tmp = (time_t) (ci->values[0].value.number + .5);
        if (tmp < 1)
        {
-               WARNING ("netapp plugin: The `Multiplier' option needs a positive integer argument.");
+               WARNING ("netapp plugin: The `Interval' option needs a positive integer argument.");
                return (-1);
        }
 
@@ -1466,183 +1859,207 @@ static int cna_config_get_interval (const oconfig_item_t *ci, /* {{{ */
 } /* }}} int cna_config_get_interval */
 
 /* Handling of the "GetIO", "GetOps" and "GetLatency" options within a
- * <GetVolumePerfData /> block. */
-static void cna_config_volume_performance_option (host_config_t *host, /* {{{ */
-               cfg_volume_perf_t *perf_volume, const oconfig_item_t *item,
-               uint32_t flag)
+ * <VolumePerf /> block. */
+static void cna_config_volume_perf_option (cfg_volume_perf_t *cvp, /* {{{ */
+               const oconfig_item_t *ci)
 {
-       int i;
-       
-       for (i = 0; i < item->values_num; ++i) {
-               const char *name;
-               volume_t *v;
-               _Bool set = true;
+       char *name;
+       ignorelist_t * il;
 
-               if (item->values[i].type != OCONFIG_TYPE_STRING) {
-                       WARNING("netapp plugin: Ignoring non-string argument in "
-                                       "\"GetVolumePerfData\" block for host %s", host->name);
-                       continue;
-               }
+       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+       {
+               WARNING ("netapp plugin: The %s option requires exactly one string argument.",
+                               ci->key);
+               return;
+       }
 
-               name = item->values[i].value.string;
-               if (name[0] == '+') {
-                       set = true;
-                       ++name;
-               } else if (name[0] == '-') {
-                       set = false;
-                       ++name;
-               }
+       name = ci->values[0].value.string;
 
-               if (!name[0]) {
-                       if (set)
-                               perf_volume->flags |= flag;
-                       else /* if (!set) */
-                               perf_volume->flags &= ~flag;
+       if (strcasecmp ("GetIO", ci->key) == 0)
+               il = cvp->il_octets;
+       else if (strcasecmp ("GetOps", ci->key) == 0)
+               il = cvp->il_operations;
+       else if (strcasecmp ("GetLatency", ci->key) == 0)
+               il = cvp->il_latency;
+       else
+               return;
 
-                       host_set_all_perf_data_flags(host, flag, set);
-                       continue;
-               }
+       ignorelist_add (il, name);
+} /* }}} void cna_config_volume_perf_option */
 
-               v = get_volume (host, name, /* data_flags = */ 0, perf_volume->flags);
-               if (v == NULL)
-                       continue;
+/* Handling of the "IgnoreSelectedIO", "IgnoreSelectedOps" and
+ * "IgnoreSelectedLatency" options within a <VolumePerf /> block. */
+static void cna_config_volume_perf_default (cfg_volume_perf_t *cvp, /* {{{ */
+               const oconfig_item_t *ci)
+{
+       ignorelist_t *il;
 
-               if (set)
-                       v->perf_data.flags |= flag;
-               else /* if (!set) */
-                       v->perf_data.flags &= ~flag;
-       } /* for (i = 0 .. item->values_num) */
-} /* }}} void cna_config_volume_performance_option */
-
-/* Corresponds to a <GetVolumePerfData /> block */
-static void cna_config_volume_performance(host_config_t *host, const oconfig_item_t *ci) { /* {{{ */
-       int i, had_io = 0, had_ops = 0, had_latency = 0;
-       cfg_service_t *service;
-       cfg_volume_perf_t *perf_volume;
-       
-       service = malloc(sizeof(*service));
-       service->query = 0;
-       service->handler = query_volume_perf_data;
-       perf_volume = service->data = malloc(sizeof(*perf_volume));
-       perf_volume->flags = CFG_VOLUME_PERF_INIT;
-       service->next = host->services;
-       host->services = service;
-       for (i = 0; i < ci->children_num; ++i) {
-               oconfig_item_t *item = ci->children + i;
-               
-               /* if (!item || !item->key || !*item->key) continue; */
-               if (!strcasecmp(item->key, "Multiplier")) {
-                       cna_config_get_multiplier (item, service);
-               } else if (!strcasecmp(item->key, "GetIO")) {
-                       had_io = 1;
-                       cna_config_volume_performance_option(host, perf_volume, item, CFG_VOLUME_PERF_IO);
-               } else if (!strcasecmp(item->key, "GetOps")) {
-                       had_ops = 1;
-                       cna_config_volume_performance_option(host, perf_volume, item, CFG_VOLUME_PERF_OPS);
-               } else if (!strcasecmp(item->key, "GetLatency")) {
-                       had_latency = 1;
-                       cna_config_volume_performance_option(host, perf_volume, item, CFG_VOLUME_PERF_LATENCY);
-               }
-       }
-       if (!had_io) {
-               perf_volume->flags |= CFG_VOLUME_PERF_IO;
-               host_set_all_perf_data_flags(host, CFG_VOLUME_PERF_IO, /* set = */ true);
-       }
-       if (!had_ops) {
-               perf_volume->flags |= CFG_VOLUME_PERF_OPS;
-               host_set_all_perf_data_flags(host, CFG_VOLUME_PERF_OPS, /* set = */ true);
-       }
-       if (!had_latency) {
-               perf_volume->flags |= CFG_VOLUME_PERF_LATENCY;
-               host_set_all_perf_data_flags(host, CFG_VOLUME_PERF_LATENCY, /* set = */ true);
+       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
+       {
+               WARNING ("netapp plugin: The %s option requires exactly one string argument.",
+                               ci->key);
+               return;
        }
-} /* }}} void cna_config_volume_performance */
 
-/* Handling of the "GetDiskUtil" option within a <GetVolumeData /> block. */
-static void cna_config_volume_usage_option (host_config_t *host, /* {{{ */
-               cfg_volume_usage_t *cfg_volume_data, const oconfig_item_t *item, uint32_t flag)
+       if (strcasecmp ("IgnoreSelectedIO", ci->key) == 0)
+               il = cvp->il_octets;
+       else if (strcasecmp ("IgnoreSelectedOps", ci->key) == 0)
+               il = cvp->il_operations;
+       else if (strcasecmp ("IgnoreSelectedLatency", ci->key) == 0)
+               il = cvp->il_latency;
+       else
+               return;
+
+       if (ci->values[0].value.boolean)
+               ignorelist_set_invert (il, /* invert = */ 0);
+       else
+               ignorelist_set_invert (il, /* invert = */ 1);
+} /* }}} void cna_config_volume_perf_default */
+
+/* Corresponds to a <Disks /> block */
+/*
+ * <VolumePerf>
+ *   GetIO "vol0"
+ *   GetIO "vol1"
+ *   IgnoreSelectedIO false
+ *
+ *   GetOps "vol0"
+ *   GetOps "vol2"
+ *   IgnoreSelectedOps false
+ *
+ *   GetLatency "vol2"
+ *   GetLatency "vol3"
+ *   IgnoreSelectedLatency false
+ * </VolumePerf>
+ */
+/* Corresponds to a <VolumePerf /> block */
+static int cna_config_volume_performance (host_config_t *host, /* {{{ */
+               const oconfig_item_t *ci)
 {
+       cfg_volume_perf_t *cfg_volume_perf;
        int i;
-       
-       for (i = 0; i < item->values_num; ++i) {
-               const char *name;
-               volume_t *v;
-               _Bool set = true;
 
-               if (item->values[i].type != OCONFIG_TYPE_STRING) {
-                       WARNING("netapp plugin: Ignoring non-string argument in \"GetVolData\""
-                                       "block for host %s", host->name);
-                       continue;
-               }
+       if ((host == NULL) || (ci == NULL))
+               return (EINVAL);
 
-               name = item->values[i].value.string;
-               if (name[0] == '+') {
-                       set = true;
-                       ++name;
-               } else if (name[0] == '-') {
-                       set = false;
-                       ++name;
-               }
+       if (host->cfg_volume_perf == NULL)
+       {
+               cfg_volume_perf = malloc (sizeof (*cfg_volume_perf));
+               if (cfg_volume_perf == NULL)
+                       return (ENOMEM);
+               memset (cfg_volume_perf, 0, sizeof (*cfg_volume_perf));
 
-               if (!name[0]) {
-                       if (set)
-                               cfg_volume_data->flags |= flag;
-                       else /* if (!set) */
-                               cfg_volume_data->flags &= ~flag;
+               /* Set default flags */
+               cfg_volume_perf->query = NULL;
+               cfg_volume_perf->volumes = NULL;
 
-                       host_set_all_cfg_volume_usage_flags(host, flag, set);
-                       continue;
+               cfg_volume_perf->il_octets = ignorelist_create (/* invert = */ 1);
+               if (cfg_volume_perf->il_octets == NULL)
+               {
+                       sfree (cfg_volume_perf);
+                       return (ENOMEM);
                }
 
-               v = get_volume(host, name, cfg_volume_data->flags, /* perf_flags = */ 0);
-               if (v == NULL)
-                       continue;
+               cfg_volume_perf->il_operations = ignorelist_create (/* invert = */ 1);
+               if (cfg_volume_perf->il_operations == NULL)
+               {
+                       ignorelist_free (cfg_volume_perf->il_octets);
+                       sfree (cfg_volume_perf);
+                       return (ENOMEM);
+               }
 
-               if (!v->cfg_volume_usage.flags)
-                       v->cfg_volume_usage.flags = cfg_volume_data->flags;
+               cfg_volume_perf->il_latency = ignorelist_create (/* invert = */ 1);
+               if (cfg_volume_perf->il_latency == NULL)
+               {
+                       ignorelist_free (cfg_volume_perf->il_octets);
+                       ignorelist_free (cfg_volume_perf->il_operations);
+                       sfree (cfg_volume_perf);
+                       return (ENOMEM);
+               }
 
-               if (set)
-                       v->cfg_volume_usage.flags |= flag;
-               else /* if (!set) */
-                       v->cfg_volume_usage.flags &= ~flag;
+               host->cfg_volume_perf = cfg_volume_perf;
        }
-} /* }}} void cna_config_volume_usage_option */
-
-/* Corresponds to a <GetVolumeData /> block */
-static void cna_config_volume_usage(host_config_t *host, oconfig_item_t *ci) { /* {{{ */
-       int i, had_df = 0;
-       cfg_service_t *service;
-       cfg_volume_usage_t *cfg_volume_data;
+       cfg_volume_perf = host->cfg_volume_perf;
        
-       service = malloc(sizeof(*service));
-       service->query = 0;
-       service->handler = collect_volume_data;
-       cfg_volume_data = service->data = malloc(sizeof(*cfg_volume_data));
-       cfg_volume_data->flags = CFG_VOLUME_USAGE_INIT;
-       service->next = host->services;
-       host->services = service;
        for (i = 0; i < ci->children_num; ++i) {
                oconfig_item_t *item = ci->children + i;
                
                /* if (!item || !item->key || !*item->key) continue; */
-               if (!strcasecmp(item->key, "Multiplier")) {
-                       cna_config_get_multiplier (item, service);
-               } else if (!strcasecmp(item->key, "GetDiskUtil")) {
-                       had_df = 1;
-                       cna_config_volume_usage_option(host, cfg_volume_data, item, CFG_VOLUME_USAGE_DF);
-               } else if (!strcasecmp(item->key, "GetSnapUtil")) {
-                       had_df = 1;
-                       cna_config_volume_usage_option(host, cfg_volume_data, item, CFG_VOLUME_USAGE_SNAP);
-               }
+               if (strcasecmp(item->key, "Interval") == 0)
+                       cna_config_get_interval (item, &cfg_volume_perf->interval);
+               else if (!strcasecmp(item->key, "GetIO"))
+                       cna_config_volume_perf_option (cfg_volume_perf, item);
+               else if (!strcasecmp(item->key, "GetOps"))
+                       cna_config_volume_perf_option (cfg_volume_perf, item);
+               else if (!strcasecmp(item->key, "GetLatency"))
+                       cna_config_volume_perf_option (cfg_volume_perf, item);
+               else if (!strcasecmp(item->key, "IgnoreSelectedIO"))
+                       cna_config_volume_perf_default (cfg_volume_perf, item);
+               else if (!strcasecmp(item->key, "IgnoreSelectedOps"))
+                       cna_config_volume_perf_default (cfg_volume_perf, item);
+               else if (!strcasecmp(item->key, "IgnoreSelectedLatency"))
+                       cna_config_volume_perf_default (cfg_volume_perf, item);
+               else
+                       WARNING ("netapp plugin: The option %s is not allowed within "
+                                       "`VolumePerf' blocks.", item->key);
        }
-       if (!had_df) {
-               cfg_volume_data->flags |= CFG_VOLUME_USAGE_DF;
-               host_set_all_cfg_volume_usage_flags(host, CFG_VOLUME_USAGE_DF, /* set = */ true);
+
+       return (0);
+} /* }}} int cna_config_volume_performance */
+
+/* Handling of the "GetCapacity" and "GetSnapshot" options within a
+ * <VolumeUsage /> block. */
+static void cna_config_volume_usage_option (cfg_volume_usage_t *cvu, /* {{{ */
+               const oconfig_item_t *ci)
+{
+       char *name;
+       ignorelist_t * il;
+
+       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_STRING))
+       {
+               WARNING ("netapp plugin: The %s option requires exactly one string argument.",
+                               ci->key);
+               return;
        }
-       if (cfg_volume_data->flags & CFG_VOLUME_USAGE_SNAP) {
-               WARNING("netapp plugin: The \"GetSnapUtil\" option does not support the \"+\" wildcard.");
+
+       name = ci->values[0].value.string;
+
+       if (strcasecmp ("GetCapacity", ci->key) == 0)
+               il = cvu->il_capacity;
+       else if (strcasecmp ("GetSnapshot", ci->key) == 0)
+               il = cvu->il_snapshot;
+       else
+               return;
+
+       ignorelist_add (il, name);
+} /* }}} void cna_config_volume_usage_option */
+
+/* Handling of the "IgnoreSelectedCapacity" and "IgnoreSelectedSnapshot"
+ * options within a <VolumeUsage /> block. */
+static void cna_config_volume_usage_default (cfg_volume_usage_t *cvu, /* {{{ */
+               const oconfig_item_t *ci)
+{
+       ignorelist_t *il;
+
+       if ((ci->values_num != 1) || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
+       {
+               WARNING ("netapp plugin: The %s option requires exactly one string argument.",
+                               ci->key);
+               return;
        }
-} /* }}} void cna_config_volume_usage */
+
+       if (strcasecmp ("IgnoreSelectedCapacity", ci->key) == 0)
+               il = cvu->il_capacity;
+       else if (strcasecmp ("IgnoreSelectedSnapshot", ci->key) == 0)
+               il = cvu->il_snapshot;
+       else
+               return;
+
+       if (ci->values[0].value.boolean)
+               ignorelist_set_invert (il, /* invert = */ 0);
+       else
+               ignorelist_set_invert (il, /* invert = */ 1);
+} /* }}} void cna_config_volume_usage_default */
 
 /* Corresponds to a <Disks /> block */
 static int cna_config_disk(host_config_t *host, oconfig_item_t *ci) { /* {{{ */
@@ -1741,9 +2158,87 @@ static int cna_config_wafl(host_config_t *host, oconfig_item_t *ci) /* {{{ */
        return (0);
 } /* }}} int cna_config_wafl */
 
+/*
+ * <VolumeUsage>
+ *   GetCapacity "vol0"
+ *   GetCapacity "vol1"
+ *   GetCapacity "vol2"
+ *   GetCapacity "vol3"
+ *   GetCapacity "vol4"
+ *   IgnoreSelectedCapacity false
+ *
+ *   GetSnapshot "vol0"
+ *   GetSnapshot "vol3"
+ *   GetSnapshot "vol4"
+ *   GetSnapshot "vol7"
+ *   IgnoreSelectedSnapshot false
+ * </VolumeUsage>
+ */
+/* Corresponds to a <VolumeUsage /> block */
+static int cna_config_volume_usage(host_config_t *host, /* {{{ */
+               const oconfig_item_t *ci)
+{
+       cfg_volume_usage_t *cfg_volume_usage;
+       int i;
+
+       if ((host == NULL) || (ci == NULL))
+               return (EINVAL);
+
+       if (host->cfg_volume_usage == NULL)
+       {
+               cfg_volume_usage = malloc (sizeof (*cfg_volume_usage));
+               if (cfg_volume_usage == NULL)
+                       return (ENOMEM);
+               memset (cfg_volume_usage, 0, sizeof (*cfg_volume_usage));
+
+               /* Set default flags */
+               cfg_volume_usage->query = NULL;
+               cfg_volume_usage->volumes = NULL;
+
+               cfg_volume_usage->il_capacity = ignorelist_create (/* invert = */ 1);
+               if (cfg_volume_usage->il_capacity == NULL)
+               {
+                       sfree (cfg_volume_usage);
+                       return (ENOMEM);
+               }
+
+               cfg_volume_usage->il_snapshot = ignorelist_create (/* invert = */ 1);
+               if (cfg_volume_usage->il_snapshot == NULL)
+               {
+                       ignorelist_free (cfg_volume_usage->il_capacity);
+                       sfree (cfg_volume_usage);
+                       return (ENOMEM);
+               }
+
+               host->cfg_volume_usage = cfg_volume_usage;
+       }
+       cfg_volume_usage = host->cfg_volume_usage;
+       
+       for (i = 0; i < ci->children_num; ++i) {
+               oconfig_item_t *item = ci->children + i;
+               
+               /* if (!item || !item->key || !*item->key) continue; */
+               if (strcasecmp(item->key, "Interval") == 0)
+                       cna_config_get_interval (item, &cfg_volume_usage->interval);
+               else if (!strcasecmp(item->key, "GetCapacity"))
+                       cna_config_volume_usage_option (cfg_volume_usage, item);
+               else if (!strcasecmp(item->key, "GetSnapshot"))
+                       cna_config_volume_usage_option (cfg_volume_usage, item);
+               else if (!strcasecmp(item->key, "IgnoreSelectedCapacity"))
+                       cna_config_volume_usage_default (cfg_volume_usage, item);
+               else if (!strcasecmp(item->key, "IgnoreSelectedSnapshot"))
+                       cna_config_volume_usage_default (cfg_volume_usage, item);
+               else
+                       WARNING ("netapp plugin: The option %s is not allowed within "
+                                       "`VolumeUsage' blocks.", item->key);
+       }
+
+       return (0);
+} /* }}} int cna_config_volume_usage */
+
 /* Corresponds to a <System /> block */
 static int cna_config_system (host_config_t *host, /* {{{ */
-               oconfig_item_t *ci, const cfg_service_t *default_service)
+               oconfig_item_t *ci)
 {
        cfg_system_t *cfg_system;
        int i;
@@ -1798,11 +2293,10 @@ static int cna_config_system (host_config_t *host, /* {{{ */
 
 /* Corresponds to a <Host /> block. */
 static host_config_t *cna_config_host (const oconfig_item_t *ci, /* {{{ */
-               const host_config_t *default_host, const cfg_service_t *def_def_service)
+               const host_config_t *default_host)
 {
        oconfig_item_t *item;
        host_config_t *host;
-       cfg_service_t default_service = *def_def_service;
        int status;
        int i;
        
@@ -1851,16 +2345,16 @@ static host_config_t *cna_config_host (const oconfig_item_t *ci, /* {{{ */
                                continue;
                        }
                        host->interval = item->values[0].value.number;
-               } else if (!strcasecmp(item->key, "GetVolumePerfData")) {
-                       cna_config_volume_performance(host, item);
-               } else if (!strcasecmp(item->key, "System")) {
-                       cna_config_system(host, item, &default_service);
                } else if (!strcasecmp(item->key, "WAFL")) {
                        cna_config_wafl(host, item);
                } else if (!strcasecmp(item->key, "Disks")) {
                        cna_config_disk(host, item);
-               } else if (!strcasecmp(item->key, "GetVolumeData")) {
+               } else if (!strcasecmp(item->key, "VolumePerf")) {
+                       cna_config_volume_performance(host, item);
+               } else if (!strcasecmp(item->key, "VolumeUsage")) {
                        cna_config_volume_usage(host, item);
+               } else if (!strcasecmp(item->key, "System")) {
+                       cna_config_system(host, item);
                } else {
                        WARNING("netapp plugin: Ignoring unknown config option \"%s\" in host block \"%s\".",
                                        item->key, ci->values[0].value.string);
@@ -1901,9 +2395,7 @@ static host_config_t *cna_config_host (const oconfig_item_t *ci, /* {{{ */
  */
 static int cna_init(void) { /* {{{ */
        char err[256];
-       na_elem_t *e;
        host_config_t *host;
-       cfg_service_t *service;
        
        if (!global_host_config) {
                WARNING("netapp plugin: Plugin loaded but no hosts defined.");
@@ -1935,30 +2427,6 @@ static int cna_init(void) { /* {{{ */
                na_server_style(host->srv, NA_STYLE_LOGIN_PASSWORD);
                na_server_adminuser(host->srv, host->username, host->password);
                na_server_set_timeout(host->srv, 5 /* seconds */);
-
-               for (service = host->services; service; service = service->next) {
-                       service->interval = host->interval * service->multiplier;
-
-                       if (service->handler == query_volume_perf_data) {
-                               service->query = na_elem_new("perf-object-get-instances");
-                               na_child_add_string(service->query, "objectname", "volume");
-                               e = na_elem_new("counters");
-                               /* "foo" means: This string has to be here but
-                                  the content doesn't matter. */
-                               na_child_add_string(e, "foo", "read_ops");
-                               na_child_add_string(e, "foo", "write_ops");
-                               na_child_add_string(e, "foo", "read_data");
-                               na_child_add_string(e, "foo", "write_data");
-                               na_child_add_string(e, "foo", "read_latency");
-                               na_child_add_string(e, "foo", "write_latency");
-                               na_child_add(service->query, e);
-                       } else if (service->handler == collect_volume_data) {
-                               service->query = na_elem_new("volume-list-info");
-                               /* na_child_add_string(service->query, "objectname", "volume"); */
-                               /* } else if (service->handler == collect_snapshot_data) { */
-                               /* service->query = na_elem_new("snapshot-list-info"); */
-                       }
-               } /* for (host->services) */
        }
        return 0;
 } /* }}} int cna_init */
@@ -1967,7 +2435,6 @@ static int cna_config (oconfig_item_t *ci) { /* {{{ */
        int i;
        oconfig_item_t *item;
        host_config_t default_host = HOST_INIT;
-       cfg_service_t default_service = SERVICE_INIT;
        
        for (i = 0; i < ci->children_num; ++i) {
                item = ci->children + i;
@@ -1976,7 +2443,7 @@ static int cna_config (oconfig_item_t *ci) { /* {{{ */
                        host_config_t *host;
                        host_config_t *tmp;
 
-                       host = cna_config_host(item, &default_host, &default_service);
+                       host = cna_config_host(item, &default_host);
                        if (host == NULL)
                                continue;
 
@@ -2003,41 +2470,32 @@ static int cna_config (oconfig_item_t *ci) { /* {{{ */
        return 0;
 } /* }}} int cna_config */
 
-static int cna_read(void) { /* {{{ */
-       na_elem_t *out;
+static int cna_read (void) { /* {{{ */
        host_config_t *host;
-       cfg_service_t *service;
        
        for (host = global_host_config; host; host = host->next) {
-               for (service = host->services; service; service = service->next) {
-                       if (--service->skip_countdown > 0) continue;
-                       service->skip_countdown = service->multiplier;
-                       out = na_server_invoke_elem(host->srv, service->query);
-                       if (na_results_status(out) != NA_OK) {
-                               int netapp_errno = na_results_errno(out);
-                               ERROR("netapp plugin: Error %d from host %s: %s", netapp_errno, host->name, na_results_reason(out));
-                               na_elem_free(out);
-                               if (netapp_errno == EIO || netapp_errno == ETIMEDOUT) {
-                                       /* Network problems. Just give up on all other services on this host. */
-                                       break;
-                               }
-                               continue;
-                       }
-                       service->handler(host, out, service->data);
-                       na_elem_free(out);
-               } /* for (host->services) */
-
                cna_query_wafl (host);
                cna_query_disk (host);
+               cna_query_volume_perf (host);
+               cna_query_volume_usage (host);
                cna_query_system (host);
        }
        return 0;
 } /* }}} int cna_read */
 
+static int cna_shutdown (void) /* {{{ */
+{
+       free_host_config (global_host_config);
+       global_host_config = NULL;
+
+       return (0);
+} /* }}} int cna_shutdown */
+
 void module_register(void) {
        plugin_register_complex_config("netapp", cna_config);
        plugin_register_init("netapp", cna_init);
        plugin_register_read("netapp", cna_read);
+       plugin_register_shutdown("netapp", cna_shutdown);
 }
 
 /* vim: set sw=2 ts=2 noet fdm=marker : */