1 /**
2 * collectd - src/libvirt.c
3 * Copyright (C) 2006-2008 Red Hat Inc.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the license is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Richard W.M. Jones <rjones@redhat.com>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
25 #include "configfile.h"
26 #include "utils_ignorelist.h"
27 #include "utils_complain.h"
29 #include <libvirt/libvirt.h>
30 #include <libvirt/virterror.h>
31 #include <libxml/parser.h>
32 #include <libxml/tree.h>
33 #include <libxml/xpath.h>
35 static const char *config_keys[] = {
36 "Connection",
38 "RefreshInterval",
40 "Domain",
41 "BlockDevice",
42 "InterfaceDevice",
43 "IgnoreSelected",
45 "HostnameFormat",
46 "InterfaceFormat",
48 NULL
49 };
50 #define NR_CONFIG_KEYS ((sizeof config_keys / sizeof config_keys[0]) - 1)
52 /* Connection. */
53 static virConnectPtr conn = 0;
54 static char *conn_string = NULL;
55 static c_complain_t conn_complain = C_COMPLAIN_INIT_STATIC;
57 /* Seconds between list refreshes, 0 disables completely. */
58 static int interval = 60;
60 /* List of domains, if specified. */
61 static ignorelist_t *il_domains = NULL;
62 /* List of block devices, if specified. */
63 static ignorelist_t *il_block_devices = NULL;
64 /* List of network interface devices, if specified. */
65 static ignorelist_t *il_interface_devices = NULL;
67 static int ignore_device_match (ignorelist_t *,
68 const char *domname, const char *devpath);
70 /* Actual list of domains found on last refresh. */
71 static virDomainPtr *domains = NULL;
72 static int nr_domains = 0;
74 static void free_domains (void);
75 static int add_domain (virDomainPtr dom);
77 /* Actual list of block devices found on last refresh. */
78 struct block_device {
79 virDomainPtr dom; /* domain */
80 char *path; /* name of block device */
81 };
83 static struct block_device *block_devices = NULL;
84 static int nr_block_devices = 0;
86 static void free_block_devices (void);
87 static int add_block_device (virDomainPtr dom, const char *path);
89 /* Actual list of network interfaces found on last refresh. */
90 struct interface_device {
91 virDomainPtr dom; /* domain */
92 char *path; /* name of interface device */
93 char *address; /* mac address of interface device */
94 char *number; /* interface device number */
95 };
97 static struct interface_device *interface_devices = NULL;
98 static int nr_interface_devices = 0;
100 static void free_interface_devices (void);
101 static int add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number);
103 /* HostnameFormat. */
104 #define HF_MAX_FIELDS 3
106 enum hf_field {
107 hf_none = 0,
108 hf_hostname,
109 hf_name,
110 hf_uuid
111 };
113 static enum hf_field hostname_format[HF_MAX_FIELDS] =
114 { hf_name };
116 /* InterfaceFormat. */
117 enum if_field {
118 if_address,
119 if_name,
120 if_number
121 };
123 static enum if_field interface_format = if_name;
125 /* Time that we last refreshed. */
126 static time_t last_refresh = (time_t) 0;
128 static int refresh_lists (void);
130 /* ERROR(...) macro for virterrors. */
131 #define VIRT_ERROR(conn,s) do { \
132 virErrorPtr err; \
133 err = (conn) ? virConnGetLastError ((conn)) : virGetLastError (); \
134 if (err) ERROR ("%s: %s", (s), err->message); \
135 } while(0)
137 static void
138 init_value_list (value_list_t *vl, virDomainPtr dom)
139 {
140 int i, n;
141 const char *name;
142 char uuid[VIR_UUID_STRING_BUFLEN];
144 sstrncpy (vl->plugin, "libvirt", sizeof (vl->plugin));
146 vl->host[0] = '\0';
148 /* Construct the hostname field according to HostnameFormat. */
149 for (i = 0; i < HF_MAX_FIELDS; ++i) {
150 if (hostname_format[i] == hf_none)
151 continue;
153 n = DATA_MAX_NAME_LEN - strlen (vl->host) - 2;
155 if (i > 0 && n >= 1) {
156 strncat (vl->host, ":", 1);
157 n--;
158 }
160 switch (hostname_format[i]) {
161 case hf_none: break;
162 case hf_hostname:
163 strncat (vl->host, hostname_g, n);
164 break;
165 case hf_name:
166 name = virDomainGetName (dom);
167 if (name)
168 strncat (vl->host, name, n);
169 break;
170 case hf_uuid:
171 if (virDomainGetUUIDString (dom, uuid) == 0)
172 strncat (vl->host, uuid, n);
173 break;
174 }
175 }
177 vl->host[sizeof (vl->host) - 1] = '\0';
178 } /* void init_value_list */
180 static void
181 memory_submit (gauge_t memory, virDomainPtr dom)
182 {
183 value_t values[1];
184 value_list_t vl = VALUE_LIST_INIT;
186 init_value_list (&vl, dom);
188 values[0].gauge = memory;
190 vl.values = values;
191 vl.values_len = 1;
193 sstrncpy (vl.type, "memory", sizeof (vl.type));
194 sstrncpy (vl.type_instance, "total", sizeof (vl.type_instance));
196 plugin_dispatch_values (&vl);
197 }
199 static void
200 memory_stats_submit (gauge_t memory, virDomainPtr dom, int tag_index)
201 {
202 static const char *tags[] = { "swap_in", "swap_out", "major_fault", "minor_fault",
203 "unused", "available", "actual_balloon", "rss"};
205 value_t values[1];
206 value_list_t vl = VALUE_LIST_INIT;
208 init_value_list (&vl, dom);
210 values[0].gauge = memory;
212 vl.values = values;
213 vl.values_len = 1;
215 sstrncpy (vl.type, "memory", sizeof (vl.type));
216 sstrncpy (vl.type_instance, tags[tag_index], sizeof (vl.type_instance));
218 plugin_dispatch_values (&vl);
219 }
221 static void
222 cpu_submit (unsigned long long cpu_time,
223 virDomainPtr dom, const char *type)
224 {
225 value_t values[1];
226 value_list_t vl = VALUE_LIST_INIT;
228 init_value_list (&vl, dom);
230 values[0].derive = cpu_time;
232 vl.values = values;
233 vl.values_len = 1;
235 sstrncpy (vl.type, type, sizeof (vl.type));
237 plugin_dispatch_values (&vl);
238 }
240 static void
241 vcpu_submit (derive_t cpu_time,
242 virDomainPtr dom, int vcpu_nr, const char *type)
243 {
244 value_t values[1];
245 value_list_t vl = VALUE_LIST_INIT;
247 init_value_list (&vl, dom);
249 values[0].derive = cpu_time;
250 vl.values = values;
251 vl.values_len = 1;
253 sstrncpy (vl.type, type, sizeof (vl.type));
254 ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%d", vcpu_nr);
256 plugin_dispatch_values (&vl);
257 }
259 static void
260 submit_derive2 (const char *type, derive_t v0, derive_t v1,
261 virDomainPtr dom, const char *devname)
262 {
263 value_t values[2];
264 value_list_t vl = VALUE_LIST_INIT;
266 init_value_list (&vl, dom);
268 values[0].derive = v0;
269 values[1].derive = v1;
270 vl.values = values;
271 vl.values_len = 2;
273 sstrncpy (vl.type, type, sizeof (vl.type));
274 sstrncpy (vl.type_instance, devname, sizeof (vl.type_instance));
276 plugin_dispatch_values (&vl);
277 } /* void submit_derive2 */
279 static int
280 lv_init (void)
281 {
282 if (virInitialize () != 0)
283 return -1;
285 return 0;
286 }
288 static int
289 lv_config (const char *key, const char *value)
290 {
291 if (virInitialize () != 0)
292 return 1;
294 if (il_domains == NULL)
295 il_domains = ignorelist_create (1);
296 if (il_block_devices == NULL)
297 il_block_devices = ignorelist_create (1);
298 if (il_interface_devices == NULL)
299 il_interface_devices = ignorelist_create (1);
301 if (strcasecmp (key, "Connection") == 0) {
302 char *tmp = strdup (value);
303 if (tmp == NULL) {
304 ERROR ("libvirt plugin: Connection strdup failed.");
305 return 1;
306 }
307 sfree (conn_string);
308 conn_string = tmp;
309 return 0;
310 }
312 if (strcasecmp (key, "RefreshInterval") == 0) {
313 char *eptr = NULL;
314 interval = strtol (value, &eptr, 10);
315 if (eptr == NULL || *eptr != '\0') return 1;
316 return 0;
317 }
319 if (strcasecmp (key, "Domain") == 0) {
320 if (ignorelist_add (il_domains, value)) return 1;
321 return 0;
322 }
323 if (strcasecmp (key, "BlockDevice") == 0) {
324 if (ignorelist_add (il_block_devices, value)) return 1;
325 return 0;
326 }
327 if (strcasecmp (key, "InterfaceDevice") == 0) {
328 if (ignorelist_add (il_interface_devices, value)) return 1;
329 return 0;
330 }
332 if (strcasecmp (key, "IgnoreSelected") == 0) {
333 if (IS_TRUE (value))
334 {
335 ignorelist_set_invert (il_domains, 0);
336 ignorelist_set_invert (il_block_devices, 0);
337 ignorelist_set_invert (il_interface_devices, 0);
338 }
339 else
340 {
341 ignorelist_set_invert (il_domains, 1);
342 ignorelist_set_invert (il_block_devices, 1);
343 ignorelist_set_invert (il_interface_devices, 1);
344 }
345 return 0;
346 }
348 if (strcasecmp (key, "HostnameFormat") == 0) {
349 char *value_copy;
350 char *fields[HF_MAX_FIELDS];
351 int i, n;
353 value_copy = strdup (value);
354 if (value_copy == NULL) {
355 ERROR ("libvirt plugin: strdup failed.");
356 return -1;
357 }
359 n = strsplit (value_copy, fields, HF_MAX_FIELDS);
360 if (n < 1) {
361 sfree (value_copy);
362 ERROR ("HostnameFormat: no fields");
363 return -1;
364 }
366 for (i = 0; i < n; ++i) {
367 if (strcasecmp (fields[i], "hostname") == 0)
368 hostname_format[i] = hf_hostname;
369 else if (strcasecmp (fields[i], "name") == 0)
370 hostname_format[i] = hf_name;
371 else if (strcasecmp (fields[i], "uuid") == 0)
372 hostname_format[i] = hf_uuid;
373 else {
374 sfree (value_copy);
375 ERROR ("unknown HostnameFormat field: %s", fields[i]);
376 return -1;
377 }
378 }
379 sfree (value_copy);
381 for (i = n; i < HF_MAX_FIELDS; ++i)
382 hostname_format[i] = hf_none;
384 return 0;
385 }
387 if (strcasecmp (key, "InterfaceFormat") == 0) {
388 if (strcasecmp (value, "name") == 0)
389 interface_format = if_name;
390 else if (strcasecmp (value, "address") == 0)
391 interface_format = if_address;
392 else if (strcasecmp (value, "number") == 0)
393 interface_format = if_number;
394 else {
395 ERROR ("unknown InterfaceFormat: %s", value);
396 return -1;
397 }
398 return 0;
399 }
401 /* Unrecognised option. */
402 return -1;
403 }
405 static int
406 lv_read (void)
407 {
408 time_t t;
409 int i;
411 if (conn == NULL) {
412 /* `conn_string == NULL' is acceptable. */
413 conn = virConnectOpenReadOnly (conn_string);
414 if (conn == NULL) {
415 c_complain (LOG_ERR, &conn_complain,
416 "libvirt plugin: Unable to connect: "
417 "virConnectOpenReadOnly failed.");
418 return -1;
419 }
420 }
421 c_release (LOG_NOTICE, &conn_complain,
422 "libvirt plugin: Connection established.");
424 time (&t);
426 /* Need to refresh domain or device lists? */
427 if ((last_refresh == (time_t) 0) ||
428 ((interval > 0) && ((last_refresh + interval) <= t))) {
429 if (refresh_lists () != 0) {
430 if (conn != NULL)
431 virConnectClose (conn);
432 conn = NULL;
433 return -1;
434 }
435 last_refresh = t;
436 }
438 #if 0
439 for (i = 0; i < nr_domains; ++i)
440 fprintf (stderr, "domain %s\n", virDomainGetName (domains[i]));
441 for (i = 0; i < nr_block_devices; ++i)
442 fprintf (stderr, "block device %d %s:%s\n",
443 i, virDomainGetName (block_devices[i].dom),
444 block_devices[i].path);
445 for (i = 0; i < nr_interface_devices; ++i)
446 fprintf (stderr, "interface device %d %s:%s\n",
447 i, virDomainGetName (interface_devices[i].dom),
448 interface_devices[i].path);
449 #endif
451 /* Get CPU usage, memory, VCPU usage for each domain. */
452 for (i = 0; i < nr_domains; ++i) {
453 virDomainInfo info;
454 virVcpuInfoPtr vinfo = NULL;
455 virDomainMemoryStatPtr minfo = NULL;
456 int status;
457 int j;
459 status = virDomainGetInfo (domains[i], &info);
460 if (status != 0)
461 {
462 ERROR ("libvirt plugin: virDomainGetInfo failed with status %i.",
463 status);
464 continue;
465 }
467 cpu_submit (info.cpuTime, domains[i], "virt_cpu_total");
468 memory_submit ((gauge_t) info.memory * 1024, domains[i]);
470 vinfo = malloc (info.nrVirtCpu * sizeof (vinfo[0]));
471 if (vinfo == NULL) {
472 ERROR ("libvirt plugin: malloc failed.");
473 continue;
474 }
476 status = virDomainGetVcpus (domains[i], vinfo, info.nrVirtCpu,
477 /* cpu map = */ NULL, /* cpu map length = */ 0);
478 if (status < 0)
479 {
480 ERROR ("libvirt plugin: virDomainGetVcpus failed with status %i.",
481 status);
482 sfree (vinfo);
483 continue;
484 }
486 for (j = 0; j < info.nrVirtCpu; ++j)
487 vcpu_submit (vinfo[j].cpuTime,
488 domains[i], vinfo[j].number, "virt_vcpu");
490 sfree (vinfo);
492 minfo = malloc (VIR_DOMAIN_MEMORY_STAT_NR * sizeof (virDomainMemoryStatStruct));
493 if (minfo == NULL) {
494 ERROR ("libvirt plugin: malloc failed.");
495 continue;
496 }
498 status = virDomainMemoryStats (domains[i], minfo, VIR_DOMAIN_MEMORY_STAT_NR, 0);
500 if (status < 0) {
501 ERROR ("libvirt plugin: virDomainMemoryStats failed with status %i.",
502 status);
503 sfree (minfo);
504 continue;
505 }
507 for (j = 0; j < status; j++) {
508 memory_stats_submit ((gauge_t) minfo[j].val, domains[i], minfo[j].tag);
509 }
511 sfree (minfo);
512 }
515 /* Get block device stats for each domain. */
516 for (i = 0; i < nr_block_devices; ++i) {
517 struct _virDomainBlockStats stats;
519 if (virDomainBlockStats (block_devices[i].dom, block_devices[i].path,
520 &stats, sizeof stats) != 0)
521 continue;
523 if ((stats.rd_req != -1) && (stats.wr_req != -1))
524 submit_derive2 ("disk_ops",
525 (derive_t) stats.rd_req, (derive_t) stats.wr_req,
526 block_devices[i].dom, block_devices[i].path);
528 if ((stats.rd_bytes != -1) && (stats.wr_bytes != -1))
529 submit_derive2 ("disk_octets",
530 (derive_t) stats.rd_bytes, (derive_t) stats.wr_bytes,
531 block_devices[i].dom, block_devices[i].path);
532 } /* for (nr_block_devices) */
534 /* Get interface stats for each domain. */
535 for (i = 0; i < nr_interface_devices; ++i) {
536 struct _virDomainInterfaceStats stats;
537 char *display_name = NULL;
540 switch (interface_format) {
541 case if_address:
542 display_name = interface_devices[i].address;
543 break;
544 case if_number:
545 display_name = interface_devices[i].number;
546 break;
547 case if_name:
548 default:
549 display_name = interface_devices[i].path;
550 }
552 if (virDomainInterfaceStats (interface_devices[i].dom,
553 interface_devices[i].path,
554 &stats, sizeof stats) != 0)
555 continue;
557 if ((stats.rx_bytes != -1) && (stats.tx_bytes != -1))
558 submit_derive2 ("if_octets",
559 (derive_t) stats.rx_bytes, (derive_t) stats.tx_bytes,
560 interface_devices[i].dom, display_name);
562 if ((stats.rx_packets != -1) && (stats.tx_packets != -1))
563 submit_derive2 ("if_packets",
564 (derive_t) stats.rx_packets, (derive_t) stats.tx_packets,
565 interface_devices[i].dom, display_name);
567 if ((stats.rx_errs != -1) && (stats.tx_errs != -1))
568 submit_derive2 ("if_errors",
569 (derive_t) stats.rx_errs, (derive_t) stats.tx_errs,
570 interface_devices[i].dom, display_name);
572 if ((stats.rx_drop != -1) && (stats.tx_drop != -1))
573 submit_derive2 ("if_dropped",
574 (derive_t) stats.rx_drop, (derive_t) stats.tx_drop,
575 interface_devices[i].dom, display_name);
576 } /* for (nr_interface_devices) */
578 return 0;
579 }
581 static int
582 refresh_lists (void)
583 {
584 int n;
586 n = virConnectNumOfDomains (conn);
587 if (n < 0) {
588 VIRT_ERROR (conn, "reading number of domains");
589 return -1;
590 }
592 if (n > 0) {
593 int i;
594 int *domids;
596 /* Get list of domains. */
597 domids = malloc (sizeof (int) * n);
598 if (domids == 0) {
599 ERROR ("libvirt plugin: malloc failed.");
600 return -1;
601 }
603 n = virConnectListDomains (conn, domids, n);
604 if (n < 0) {
605 VIRT_ERROR (conn, "reading list of domains");
606 sfree (domids);
607 return -1;
608 }
610 free_block_devices ();
611 free_interface_devices ();
612 free_domains ();
614 /* Fetch each domain and add it to the list, unless ignore. */
615 for (i = 0; i < n; ++i) {
616 virDomainPtr dom = NULL;
617 const char *name;
618 char *xml = NULL;
619 xmlDocPtr xml_doc = NULL;
620 xmlXPathContextPtr xpath_ctx = NULL;
621 xmlXPathObjectPtr xpath_obj = NULL;
622 int j;
624 dom = virDomainLookupByID (conn, domids[i]);
625 if (dom == NULL) {
626 VIRT_ERROR (conn, "virDomainLookupByID");
627 /* Could be that the domain went away -- ignore it anyway. */
628 continue;
629 }
631 name = virDomainGetName (dom);
632 if (name == NULL) {
633 VIRT_ERROR (conn, "virDomainGetName");
634 goto cont;
635 }
637 if (il_domains && ignorelist_match (il_domains, name) != 0)
638 goto cont;
640 if (add_domain (dom) < 0) {
641 ERROR ("libvirt plugin: malloc failed.");
642 goto cont;
643 }
645 /* Get a list of devices for this domain. */
646 xml = virDomainGetXMLDesc (dom, 0);
647 if (!xml) {
648 VIRT_ERROR (conn, "virDomainGetXMLDesc");
649 goto cont;
650 }
652 /* Yuck, XML. Parse out the devices. */
653 xml_doc = xmlReadDoc ((xmlChar *) xml, NULL, NULL, XML_PARSE_NONET);
654 if (xml_doc == NULL) {
655 VIRT_ERROR (conn, "xmlReadDoc");
656 goto cont;
657 }
659 xpath_ctx = xmlXPathNewContext (xml_doc);
661 /* Block devices. */
662 xpath_obj = xmlXPathEval
663 ((xmlChar *) "/domain/devices/disk/target[@dev]",
664 xpath_ctx);
665 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
666 xpath_obj->nodesetval == NULL)
667 goto cont;
669 for (j = 0; j < xpath_obj->nodesetval->nodeNr; ++j) {
670 xmlNodePtr node;
671 char *path = NULL;
673 node = xpath_obj->nodesetval->nodeTab[j];
674 if (!node) continue;
675 path = (char *) xmlGetProp (node, (xmlChar *) "dev");
676 if (!path) continue;
678 if (il_block_devices &&
679 ignore_device_match (il_block_devices, name, path) != 0)
680 goto cont2;
682 add_block_device (dom, path);
683 cont2:
684 if (path) xmlFree (path);
685 }
686 xmlXPathFreeObject (xpath_obj);
688 /* Network interfaces. */
689 xpath_obj = xmlXPathEval
690 ((xmlChar *) "/domain/devices/interface[target[@dev]]",
691 xpath_ctx);
692 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
693 xpath_obj->nodesetval == NULL)
694 goto cont;
696 xmlNodeSetPtr xml_interfaces = xpath_obj->nodesetval;
698 for (j = 0; j < xml_interfaces->nodeNr; ++j) {
699 char *path = NULL;
700 char *address = NULL;
701 xmlNodePtr xml_interface;
703 xml_interface = xml_interfaces->nodeTab[j];
704 if (!xml_interface) continue;
705 xmlNodePtr child = NULL;
707 for (child = xml_interface->children; child; child = child->next) {
708 if (child->type != XML_ELEMENT_NODE) continue;
710 if (xmlStrEqual(child->name, (const xmlChar *) "target")) {
711 path = (char *) xmlGetProp (child, (const xmlChar *) "dev");
712 if (!path) continue;
713 } else if (xmlStrEqual(child->name, (const xmlChar *) "mac")) {
714 address = (char *) xmlGetProp (child, (const xmlChar *) "address");
715 if (!address) continue;
716 }
717 }
719 if (il_interface_devices &&
720 (ignore_device_match (il_interface_devices, name, path) != 0 ||
721 ignore_device_match (il_interface_devices, name, address) != 0))
722 goto cont3;
724 add_interface_device (dom, path, address, j+1);
725 cont3:
726 if (path) xmlFree (path);
727 if (address) xmlFree (address);
728 }
730 cont:
731 if (xpath_obj) xmlXPathFreeObject (xpath_obj);
732 if (xpath_ctx) xmlXPathFreeContext (xpath_ctx);
733 if (xml_doc) xmlFreeDoc (xml_doc);
734 sfree (xml);
735 }
737 sfree (domids);
738 }
740 return 0;
741 }
743 static void
744 free_domains ()
745 {
746 int i;
748 if (domains) {
749 for (i = 0; i < nr_domains; ++i)
750 virDomainFree (domains[i]);
751 sfree (domains);
752 }
753 domains = NULL;
754 nr_domains = 0;
755 }
757 static int
758 add_domain (virDomainPtr dom)
759 {
760 virDomainPtr *new_ptr;
761 int new_size = sizeof (domains[0]) * (nr_domains+1);
763 if (domains)
764 new_ptr = realloc (domains, new_size);
765 else
766 new_ptr = malloc (new_size);
768 if (new_ptr == NULL)
769 return -1;
771 domains = new_ptr;
772 domains[nr_domains] = dom;
773 return nr_domains++;
774 }
776 static void
777 free_block_devices ()
778 {
779 int i;
781 if (block_devices) {
782 for (i = 0; i < nr_block_devices; ++i)
783 sfree (block_devices[i].path);
784 sfree (block_devices);
785 }
786 block_devices = NULL;
787 nr_block_devices = 0;
788 }
790 static int
791 add_block_device (virDomainPtr dom, const char *path)
792 {
793 struct block_device *new_ptr;
794 int new_size = sizeof (block_devices[0]) * (nr_block_devices+1);
795 char *path_copy;
797 path_copy = strdup (path);
798 if (!path_copy)
799 return -1;
801 if (block_devices)
802 new_ptr = realloc (block_devices, new_size);
803 else
804 new_ptr = malloc (new_size);
806 if (new_ptr == NULL) {
807 sfree (path_copy);
808 return -1;
809 }
810 block_devices = new_ptr;
811 block_devices[nr_block_devices].dom = dom;
812 block_devices[nr_block_devices].path = path_copy;
813 return nr_block_devices++;
814 }
816 static void
817 free_interface_devices ()
818 {
819 int i;
821 if (interface_devices) {
822 for (i = 0; i < nr_interface_devices; ++i) {
823 sfree (interface_devices[i].path);
824 sfree (interface_devices[i].address);
825 sfree (interface_devices[i].number);
826 }
827 sfree (interface_devices);
828 }
829 interface_devices = NULL;
830 nr_interface_devices = 0;
831 }
833 static int
834 add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number)
835 {
836 struct interface_device *new_ptr;
837 int new_size = sizeof (interface_devices[0]) * (nr_interface_devices+1);
838 char *path_copy, *address_copy, number_string[15];
840 path_copy = strdup (path);
841 if (!path_copy) return -1;
843 address_copy = strdup (address);
844 if (!address_copy) {
845 sfree(path_copy);
846 return -1;
847 }
849 snprintf(number_string, sizeof (number_string), "interface-%u", number);
851 if (interface_devices)
852 new_ptr = realloc (interface_devices, new_size);
853 else
854 new_ptr = malloc (new_size);
856 if (new_ptr == NULL) {
857 sfree (path_copy);
858 sfree (address_copy);
859 return -1;
860 }
861 interface_devices = new_ptr;
862 interface_devices[nr_interface_devices].dom = dom;
863 interface_devices[nr_interface_devices].path = path_copy;
864 interface_devices[nr_interface_devices].address = address_copy;
865 interface_devices[nr_interface_devices].number = strdup(number_string);
866 return nr_interface_devices++;
867 }
869 static int
870 ignore_device_match (ignorelist_t *il, const char *domname, const char *devpath)
871 {
872 char *name;
873 int n, r;
875 n = sizeof (char) * (strlen (domname) + strlen (devpath) + 2);
876 name = malloc (n);
877 if (name == NULL) {
878 ERROR ("libvirt plugin: malloc failed.");
879 return 0;
880 }
881 ssnprintf (name, n, "%s:%s", domname, devpath);
882 r = ignorelist_match (il, name);
883 sfree (name);
884 return r;
885 }
887 static int
888 lv_shutdown (void)
889 {
890 free_block_devices ();
891 free_interface_devices ();
892 free_domains ();
894 if (conn != NULL)
895 virConnectClose (conn);
896 conn = NULL;
898 ignorelist_free (il_domains);
899 il_domains = NULL;
900 ignorelist_free (il_block_devices);
901 il_block_devices = NULL;
902 ignorelist_free (il_interface_devices);
903 il_interface_devices = NULL;
905 return 0;
906 }
908 void
909 module_register (void)
910 {
911 plugin_register_config ("libvirt",
912 lv_config,
913 config_keys, NR_CONFIG_KEYS);
914 plugin_register_init ("libvirt", lv_init);
915 plugin_register_read ("libvirt", lv_read);
916 plugin_register_shutdown ("libvirt", lv_shutdown);
917 }
919 /*
920 * vim: shiftwidth=4 tabstop=8 softtabstop=4 expandtab fdm=marker
921 */