1 /**
2 * collectd - src/virt.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 /* Plugin name */
36 #define PLUGIN_NAME "virt"
38 static const char *config_keys[] = {
39 "Connection",
41 "RefreshInterval",
43 "Domain",
44 "BlockDevice",
45 "InterfaceDevice",
46 "IgnoreSelected",
48 "HostnameFormat",
49 "InterfaceFormat",
51 "PluginInstanceFormat",
53 NULL
54 };
55 #define NR_CONFIG_KEYS ((sizeof config_keys / sizeof config_keys[0]) - 1)
57 /* Connection. */
58 static virConnectPtr conn = 0;
59 static char *conn_string = NULL;
60 static c_complain_t conn_complain = C_COMPLAIN_INIT_STATIC;
62 /* Seconds between list refreshes, 0 disables completely. */
63 static int interval = 60;
65 /* List of domains, if specified. */
66 static ignorelist_t *il_domains = NULL;
67 /* List of block devices, if specified. */
68 static ignorelist_t *il_block_devices = NULL;
69 /* List of network interface devices, if specified. */
70 static ignorelist_t *il_interface_devices = NULL;
72 static int ignore_device_match (ignorelist_t *,
73 const char *domname, const char *devpath);
75 /* Actual list of domains found on last refresh. */
76 static virDomainPtr *domains = NULL;
77 static int nr_domains = 0;
79 static void free_domains (void);
80 static int add_domain (virDomainPtr dom);
82 /* Actual list of block devices found on last refresh. */
83 struct block_device {
84 virDomainPtr dom; /* domain */
85 char *path; /* name of block device */
86 };
88 static struct block_device *block_devices = NULL;
89 static int nr_block_devices = 0;
91 static void free_block_devices (void);
92 static int add_block_device (virDomainPtr dom, const char *path);
94 /* Actual list of network interfaces found on last refresh. */
95 struct interface_device {
96 virDomainPtr dom; /* domain */
97 char *path; /* name of interface device */
98 char *address; /* mac address of interface device */
99 char *number; /* interface device number */
100 };
102 static struct interface_device *interface_devices = NULL;
103 static int nr_interface_devices = 0;
105 static void free_interface_devices (void);
106 static int add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number);
108 /* HostnameFormat. */
109 #define HF_MAX_FIELDS 3
111 enum hf_field {
112 hf_none = 0,
113 hf_hostname,
114 hf_name,
115 hf_uuid
116 };
118 static enum hf_field hostname_format[HF_MAX_FIELDS] =
119 { hf_name };
121 /* PluginInstanceFormat */
122 #define PLGINST_MAX_FIELDS 2
124 enum plginst_field {
125 plginst_none = 0,
126 plginst_name,
127 plginst_uuid
128 };
130 static enum plginst_field plugin_instance_format[PLGINST_MAX_FIELDS] =
131 { plginst_name };
133 /* InterfaceFormat. */
134 enum if_field {
135 if_address,
136 if_name,
137 if_number
138 };
140 static enum if_field interface_format = if_name;
142 /* Time that we last refreshed. */
143 static time_t last_refresh = (time_t) 0;
145 static int refresh_lists (void);
147 /* ERROR(...) macro for virterrors. */
148 #define VIRT_ERROR(conn,s) do { \
149 virErrorPtr err; \
150 err = (conn) ? virConnGetLastError ((conn)) : virGetLastError (); \
151 if (err) ERROR ("%s: %s", (s), err->message); \
152 } while(0)
154 static void
155 init_value_list (value_list_t *vl, virDomainPtr dom)
156 {
157 int i, n;
158 const char *name;
159 char uuid[VIR_UUID_STRING_BUFLEN];
161 sstrncpy (vl->plugin, PLUGIN_NAME, sizeof (vl->plugin));
163 vl->host[0] = '\0';
165 /* Construct the hostname field according to HostnameFormat. */
166 for (i = 0; i < HF_MAX_FIELDS; ++i) {
167 if (hostname_format[i] == hf_none)
168 continue;
170 n = DATA_MAX_NAME_LEN - strlen (vl->host) - 2;
172 if (i > 0 && n >= 1) {
173 strncat (vl->host, ":", 1);
174 n--;
175 }
177 switch (hostname_format[i]) {
178 case hf_none: break;
179 case hf_hostname:
180 strncat (vl->host, hostname_g, n);
181 break;
182 case hf_name:
183 name = virDomainGetName (dom);
184 if (name)
185 strncat (vl->host, name, n);
186 break;
187 case hf_uuid:
188 if (virDomainGetUUIDString (dom, uuid) == 0)
189 strncat (vl->host, uuid, n);
190 break;
191 }
192 }
194 vl->host[sizeof (vl->host) - 1] = '\0';
196 /* Construct the plugin instance field according to PluginInstanceFormat. */
197 for (i = 0; i < PLGINST_MAX_FIELDS; ++i) {
198 if (plugin_instance_format[i] == plginst_none)
199 continue;
201 n = sizeof(vl->plugin_instance) - strlen (vl->plugin_instance) - 2;
203 if (i > 0 && n >= 1) {
204 strncat (vl->plugin_instance, ":", 1);
205 n--;
206 }
208 switch (plugin_instance_format[i]) {
209 case plginst_none: break;
210 case plginst_name:
211 name = virDomainGetName (dom);
212 if (name)
213 strncat (vl->plugin_instance, name, n);
214 break;
215 case plginst_uuid:
216 if (virDomainGetUUIDString (dom, uuid) == 0)
217 strncat (vl->plugin_instance, uuid, n);
218 break;
219 }
220 }
222 vl->plugin_instance[sizeof (vl->plugin_instance) - 1] = '\0';
224 } /* void init_value_list */
226 static void
227 memory_submit (gauge_t memory, virDomainPtr dom)
228 {
229 value_t values[1];
230 value_list_t vl = VALUE_LIST_INIT;
232 init_value_list (&vl, dom);
234 values[0].gauge = memory;
236 vl.values = values;
237 vl.values_len = 1;
239 sstrncpy (vl.type, "memory", sizeof (vl.type));
240 sstrncpy (vl.type_instance, "total", sizeof (vl.type_instance));
242 plugin_dispatch_values (&vl);
243 }
245 static void
246 memory_stats_submit (gauge_t memory, virDomainPtr dom, int tag_index)
247 {
248 static const char *tags[] = { "swap_in", "swap_out", "major_fault", "minor_fault",
249 "unused", "available", "actual_balloon", "rss"};
251 value_t values[1];
252 value_list_t vl = VALUE_LIST_INIT;
254 init_value_list (&vl, dom);
256 values[0].gauge = memory;
258 vl.values = values;
259 vl.values_len = 1;
261 sstrncpy (vl.type, "memory", sizeof (vl.type));
262 sstrncpy (vl.type_instance, tags[tag_index], sizeof (vl.type_instance));
264 plugin_dispatch_values (&vl);
265 }
267 static void
268 cpu_submit (unsigned long long cpu_time,
269 virDomainPtr dom, const char *type)
270 {
271 value_t values[1];
272 value_list_t vl = VALUE_LIST_INIT;
274 init_value_list (&vl, dom);
276 values[0].derive = cpu_time;
278 vl.values = values;
279 vl.values_len = 1;
281 sstrncpy (vl.type, type, sizeof (vl.type));
283 plugin_dispatch_values (&vl);
284 }
286 static void
287 vcpu_submit (derive_t cpu_time,
288 virDomainPtr dom, int vcpu_nr, const char *type)
289 {
290 value_t values[1];
291 value_list_t vl = VALUE_LIST_INIT;
293 init_value_list (&vl, dom);
295 values[0].derive = cpu_time;
296 vl.values = values;
297 vl.values_len = 1;
299 sstrncpy (vl.type, type, sizeof (vl.type));
300 ssnprintf (vl.type_instance, sizeof (vl.type_instance), "%d", vcpu_nr);
302 plugin_dispatch_values (&vl);
303 }
305 static void
306 submit_derive2 (const char *type, derive_t v0, derive_t v1,
307 virDomainPtr dom, const char *devname)
308 {
309 value_t values[2];
310 value_list_t vl = VALUE_LIST_INIT;
312 init_value_list (&vl, dom);
314 values[0].derive = v0;
315 values[1].derive = v1;
316 vl.values = values;
317 vl.values_len = 2;
319 sstrncpy (vl.type, type, sizeof (vl.type));
320 sstrncpy (vl.type_instance, devname, sizeof (vl.type_instance));
322 plugin_dispatch_values (&vl);
323 } /* void submit_derive2 */
325 static int
326 lv_init (void)
327 {
328 if (virInitialize () != 0)
329 return -1;
331 return 0;
332 }
334 static int
335 lv_config (const char *key, const char *value)
336 {
337 if (virInitialize () != 0)
338 return 1;
340 if (il_domains == NULL)
341 il_domains = ignorelist_create (1);
342 if (il_block_devices == NULL)
343 il_block_devices = ignorelist_create (1);
344 if (il_interface_devices == NULL)
345 il_interface_devices = ignorelist_create (1);
347 if (strcasecmp (key, "Connection") == 0) {
348 char *tmp = strdup (value);
349 if (tmp == NULL) {
350 ERROR (PLUGIN_NAME " plugin: Connection strdup failed.");
351 return 1;
352 }
353 sfree (conn_string);
354 conn_string = tmp;
355 return 0;
356 }
358 if (strcasecmp (key, "RefreshInterval") == 0) {
359 char *eptr = NULL;
360 interval = strtol (value, &eptr, 10);
361 if (eptr == NULL || *eptr != '\0') return 1;
362 return 0;
363 }
365 if (strcasecmp (key, "Domain") == 0) {
366 if (ignorelist_add (il_domains, value)) return 1;
367 return 0;
368 }
369 if (strcasecmp (key, "BlockDevice") == 0) {
370 if (ignorelist_add (il_block_devices, value)) return 1;
371 return 0;
372 }
373 if (strcasecmp (key, "InterfaceDevice") == 0) {
374 if (ignorelist_add (il_interface_devices, value)) return 1;
375 return 0;
376 }
378 if (strcasecmp (key, "IgnoreSelected") == 0) {
379 if (IS_TRUE (value))
380 {
381 ignorelist_set_invert (il_domains, 0);
382 ignorelist_set_invert (il_block_devices, 0);
383 ignorelist_set_invert (il_interface_devices, 0);
384 }
385 else
386 {
387 ignorelist_set_invert (il_domains, 1);
388 ignorelist_set_invert (il_block_devices, 1);
389 ignorelist_set_invert (il_interface_devices, 1);
390 }
391 return 0;
392 }
394 if (strcasecmp (key, "HostnameFormat") == 0) {
395 char *value_copy;
396 char *fields[HF_MAX_FIELDS];
397 int i, n;
399 value_copy = strdup (value);
400 if (value_copy == NULL) {
401 ERROR (PLUGIN_NAME " plugin: strdup failed.");
402 return -1;
403 }
405 n = strsplit (value_copy, fields, HF_MAX_FIELDS);
406 if (n < 1) {
407 sfree (value_copy);
408 ERROR (PLUGIN_NAME " plugin: HostnameFormat: no fields");
409 return -1;
410 }
412 for (i = 0; i < n; ++i) {
413 if (strcasecmp (fields[i], "hostname") == 0)
414 hostname_format[i] = hf_hostname;
415 else if (strcasecmp (fields[i], "name") == 0)
416 hostname_format[i] = hf_name;
417 else if (strcasecmp (fields[i], "uuid") == 0)
418 hostname_format[i] = hf_uuid;
419 else {
420 sfree (value_copy);
421 ERROR (PLUGIN_NAME " plugin: unknown HostnameFormat field: %s", fields[i]);
422 return -1;
423 }
424 }
425 sfree (value_copy);
427 for (i = n; i < HF_MAX_FIELDS; ++i)
428 hostname_format[i] = hf_none;
430 return 0;
431 }
433 if (strcasecmp (key, "PluginInstanceFormat") == 0) {
434 char *value_copy;
435 char *fields[PLGINST_MAX_FIELDS];
436 int i, n;
438 value_copy = strdup (value);
439 if (value_copy == NULL) {
440 ERROR (PLUGIN_NAME " plugin: strdup failed.");
441 return -1;
442 }
444 n = strsplit (value_copy, fields, PLGINST_MAX_FIELDS);
445 if (n < 1) {
446 sfree (value_copy);
447 ERROR (PLUGIN_NAME " plugin: PluginInstanceFormat: no fields");
448 return -1;
449 }
451 for (i = 0; i < n; ++i) {
452 if (strcasecmp (fields[i], "name") == 0)
453 plugin_instance_format[i] = plginst_name;
454 else if (strcasecmp (fields[i], "uuid") == 0)
455 plugin_instance_format[i] = plginst_uuid;
456 else {
457 sfree (value_copy);
458 ERROR (PLUGIN_NAME " plugin: unknown HostnameFormat field: %s", fields[i]);
459 return -1;
460 }
461 }
462 sfree (value_copy);
464 for (i = n; i < PLGINST_MAX_FIELDS; ++i)
465 plugin_instance_format[i] = plginst_none;
467 return 0;
468 }
470 if (strcasecmp (key, "InterfaceFormat") == 0) {
471 if (strcasecmp (value, "name") == 0)
472 interface_format = if_name;
473 else if (strcasecmp (value, "address") == 0)
474 interface_format = if_address;
475 else if (strcasecmp (value, "number") == 0)
476 interface_format = if_number;
477 else {
478 ERROR (PLUGIN_NAME " plugin: unknown InterfaceFormat: %s", value);
479 return -1;
480 }
481 return 0;
482 }
484 /* Unrecognised option. */
485 return -1;
486 }
488 static int
489 lv_read (void)
490 {
491 time_t t;
492 int i;
494 if (conn == NULL) {
495 /* `conn_string == NULL' is acceptable. */
496 conn = virConnectOpenReadOnly (conn_string);
497 if (conn == NULL) {
498 c_complain (LOG_ERR, &conn_complain,
499 PLUGIN_NAME " plugin: Unable to connect: "
500 "virConnectOpenReadOnly failed.");
501 return -1;
502 }
503 }
504 c_release (LOG_NOTICE, &conn_complain,
505 PLUGIN_NAME " plugin: Connection established.");
507 time (&t);
509 /* Need to refresh domain or device lists? */
510 if ((last_refresh == (time_t) 0) ||
511 ((interval > 0) && ((last_refresh + interval) <= t))) {
512 if (refresh_lists () != 0) {
513 if (conn != NULL)
514 virConnectClose (conn);
515 conn = NULL;
516 return -1;
517 }
518 last_refresh = t;
519 }
521 #if 0
522 for (i = 0; i < nr_domains; ++i)
523 fprintf (stderr, "domain %s\n", virDomainGetName (domains[i]));
524 for (i = 0; i < nr_block_devices; ++i)
525 fprintf (stderr, "block device %d %s:%s\n",
526 i, virDomainGetName (block_devices[i].dom),
527 block_devices[i].path);
528 for (i = 0; i < nr_interface_devices; ++i)
529 fprintf (stderr, "interface device %d %s:%s\n",
530 i, virDomainGetName (interface_devices[i].dom),
531 interface_devices[i].path);
532 #endif
534 /* Get CPU usage, memory, VCPU usage for each domain. */
535 for (i = 0; i < nr_domains; ++i) {
536 virDomainInfo info;
537 virVcpuInfoPtr vinfo = NULL;
538 virDomainMemoryStatPtr minfo = NULL;
539 int status;
540 int j;
542 status = virDomainGetInfo (domains[i], &info);
543 if (status != 0)
544 {
545 ERROR (PLUGIN_NAME " plugin: virDomainGetInfo failed with status %i.",
546 status);
547 continue;
548 }
550 if (info.state != VIR_DOMAIN_RUNNING)
551 {
552 /* only gather stats for running domains */
553 continue;
554 }
556 cpu_submit (info.cpuTime, domains[i], "virt_cpu_total");
557 memory_submit ((gauge_t) info.memory * 1024, domains[i]);
559 vinfo = malloc (info.nrVirtCpu * sizeof (vinfo[0]));
560 if (vinfo == NULL) {
561 ERROR (PLUGIN_NAME " plugin: malloc failed.");
562 continue;
563 }
565 status = virDomainGetVcpus (domains[i], vinfo, info.nrVirtCpu,
566 /* cpu map = */ NULL, /* cpu map length = */ 0);
567 if (status < 0)
568 {
569 ERROR (PLUGIN_NAME " plugin: virDomainGetVcpus failed with status %i.",
570 status);
571 sfree (vinfo);
572 continue;
573 }
575 for (j = 0; j < info.nrVirtCpu; ++j)
576 vcpu_submit (vinfo[j].cpuTime,
577 domains[i], vinfo[j].number, "virt_vcpu");
579 sfree (vinfo);
581 minfo = malloc (VIR_DOMAIN_MEMORY_STAT_NR * sizeof (virDomainMemoryStatStruct));
582 if (minfo == NULL) {
583 ERROR ("virt plugin: malloc failed.");
584 continue;
585 }
587 status = virDomainMemoryStats (domains[i], minfo, VIR_DOMAIN_MEMORY_STAT_NR, 0);
589 if (status < 0) {
590 ERROR ("virt plugin: virDomainMemoryStats failed with status %i.",
591 status);
592 sfree (minfo);
593 continue;
594 }
596 for (j = 0; j < status; j++) {
597 memory_stats_submit ((gauge_t) minfo[j].val * 1024, domains[i], minfo[j].tag);
598 }
600 sfree (minfo);
601 }
604 /* Get block device stats for each domain. */
605 for (i = 0; i < nr_block_devices; ++i) {
606 struct _virDomainBlockStats stats;
608 if (virDomainBlockStats (block_devices[i].dom, block_devices[i].path,
609 &stats, sizeof stats) != 0)
610 continue;
612 if ((stats.rd_req != -1) && (stats.wr_req != -1))
613 submit_derive2 ("disk_ops",
614 (derive_t) stats.rd_req, (derive_t) stats.wr_req,
615 block_devices[i].dom, block_devices[i].path);
617 if ((stats.rd_bytes != -1) && (stats.wr_bytes != -1))
618 submit_derive2 ("disk_octets",
619 (derive_t) stats.rd_bytes, (derive_t) stats.wr_bytes,
620 block_devices[i].dom, block_devices[i].path);
621 } /* for (nr_block_devices) */
623 /* Get interface stats for each domain. */
624 for (i = 0; i < nr_interface_devices; ++i) {
625 struct _virDomainInterfaceStats stats;
626 char *display_name = NULL;
629 switch (interface_format) {
630 case if_address:
631 display_name = interface_devices[i].address;
632 break;
633 case if_number:
634 display_name = interface_devices[i].number;
635 break;
636 case if_name:
637 default:
638 display_name = interface_devices[i].path;
639 }
641 if (virDomainInterfaceStats (interface_devices[i].dom,
642 interface_devices[i].path,
643 &stats, sizeof stats) != 0)
644 continue;
646 if ((stats.rx_bytes != -1) && (stats.tx_bytes != -1))
647 submit_derive2 ("if_octets",
648 (derive_t) stats.rx_bytes, (derive_t) stats.tx_bytes,
649 interface_devices[i].dom, display_name);
651 if ((stats.rx_packets != -1) && (stats.tx_packets != -1))
652 submit_derive2 ("if_packets",
653 (derive_t) stats.rx_packets, (derive_t) stats.tx_packets,
654 interface_devices[i].dom, display_name);
656 if ((stats.rx_errs != -1) && (stats.tx_errs != -1))
657 submit_derive2 ("if_errors",
658 (derive_t) stats.rx_errs, (derive_t) stats.tx_errs,
659 interface_devices[i].dom, display_name);
661 if ((stats.rx_drop != -1) && (stats.tx_drop != -1))
662 submit_derive2 ("if_dropped",
663 (derive_t) stats.rx_drop, (derive_t) stats.tx_drop,
664 interface_devices[i].dom, display_name);
665 } /* for (nr_interface_devices) */
667 return 0;
668 }
670 static int
671 refresh_lists (void)
672 {
673 int n;
675 n = virConnectNumOfDomains (conn);
676 if (n < 0) {
677 VIRT_ERROR (conn, "reading number of domains");
678 return -1;
679 }
681 if (n > 0) {
682 int i;
683 int *domids;
685 /* Get list of domains. */
686 domids = malloc (sizeof (int) * n);
687 if (domids == 0) {
688 ERROR (PLUGIN_NAME " plugin: malloc failed.");
689 return -1;
690 }
692 n = virConnectListDomains (conn, domids, n);
693 if (n < 0) {
694 VIRT_ERROR (conn, "reading list of domains");
695 sfree (domids);
696 return -1;
697 }
699 free_block_devices ();
700 free_interface_devices ();
701 free_domains ();
703 /* Fetch each domain and add it to the list, unless ignore. */
704 for (i = 0; i < n; ++i) {
705 virDomainPtr dom = NULL;
706 const char *name;
707 char *xml = NULL;
708 xmlDocPtr xml_doc = NULL;
709 xmlXPathContextPtr xpath_ctx = NULL;
710 xmlXPathObjectPtr xpath_obj = NULL;
711 int j;
713 dom = virDomainLookupByID (conn, domids[i]);
714 if (dom == NULL) {
715 VIRT_ERROR (conn, "virDomainLookupByID");
716 /* Could be that the domain went away -- ignore it anyway. */
717 continue;
718 }
720 name = virDomainGetName (dom);
721 if (name == NULL) {
722 VIRT_ERROR (conn, "virDomainGetName");
723 goto cont;
724 }
726 if (il_domains && ignorelist_match (il_domains, name) != 0)
727 goto cont;
729 if (add_domain (dom) < 0) {
730 ERROR (PLUGIN_NAME " plugin: malloc failed.");
731 goto cont;
732 }
734 /* Get a list of devices for this domain. */
735 xml = virDomainGetXMLDesc (dom, 0);
736 if (!xml) {
737 VIRT_ERROR (conn, "virDomainGetXMLDesc");
738 goto cont;
739 }
741 /* Yuck, XML. Parse out the devices. */
742 xml_doc = xmlReadDoc ((xmlChar *) xml, NULL, NULL, XML_PARSE_NONET);
743 if (xml_doc == NULL) {
744 VIRT_ERROR (conn, "xmlReadDoc");
745 goto cont;
746 }
748 xpath_ctx = xmlXPathNewContext (xml_doc);
750 /* Block devices. */
751 xpath_obj = xmlXPathEval
752 ((xmlChar *) "/domain/devices/disk/target[@dev]",
753 xpath_ctx);
754 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
755 xpath_obj->nodesetval == NULL)
756 goto cont;
758 for (j = 0; j < xpath_obj->nodesetval->nodeNr; ++j) {
759 xmlNodePtr node;
760 char *path = NULL;
762 node = xpath_obj->nodesetval->nodeTab[j];
763 if (!node) continue;
764 path = (char *) xmlGetProp (node, (xmlChar *) "dev");
765 if (!path) continue;
767 if (il_block_devices &&
768 ignore_device_match (il_block_devices, name, path) != 0)
769 goto cont2;
771 add_block_device (dom, path);
772 cont2:
773 if (path) xmlFree (path);
774 }
775 xmlXPathFreeObject (xpath_obj);
777 /* Network interfaces. */
778 xpath_obj = xmlXPathEval
779 ((xmlChar *) "/domain/devices/interface[target[@dev]]",
780 xpath_ctx);
781 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
782 xpath_obj->nodesetval == NULL)
783 goto cont;
785 xmlNodeSetPtr xml_interfaces = xpath_obj->nodesetval;
787 for (j = 0; j < xml_interfaces->nodeNr; ++j) {
788 char *path = NULL;
789 char *address = NULL;
790 xmlNodePtr xml_interface;
792 xml_interface = xml_interfaces->nodeTab[j];
793 if (!xml_interface) continue;
794 xmlNodePtr child = NULL;
796 for (child = xml_interface->children; child; child = child->next) {
797 if (child->type != XML_ELEMENT_NODE) continue;
799 if (xmlStrEqual(child->name, (const xmlChar *) "target")) {
800 path = (char *) xmlGetProp (child, (const xmlChar *) "dev");
801 if (!path) continue;
802 } else if (xmlStrEqual(child->name, (const xmlChar *) "mac")) {
803 address = (char *) xmlGetProp (child, (const xmlChar *) "address");
804 if (!address) continue;
805 }
806 }
808 if (il_interface_devices &&
809 (ignore_device_match (il_interface_devices, name, path) != 0 ||
810 ignore_device_match (il_interface_devices, name, address) != 0))
811 goto cont3;
813 add_interface_device (dom, path, address, j+1);
814 cont3:
815 if (path) xmlFree (path);
816 if (address) xmlFree (address);
817 }
819 cont:
820 if (xpath_obj) xmlXPathFreeObject (xpath_obj);
821 if (xpath_ctx) xmlXPathFreeContext (xpath_ctx);
822 if (xml_doc) xmlFreeDoc (xml_doc);
823 sfree (xml);
824 }
826 sfree (domids);
827 }
829 return 0;
830 }
832 static void
833 free_domains ()
834 {
835 int i;
837 if (domains) {
838 for (i = 0; i < nr_domains; ++i)
839 virDomainFree (domains[i]);
840 sfree (domains);
841 }
842 domains = NULL;
843 nr_domains = 0;
844 }
846 static int
847 add_domain (virDomainPtr dom)
848 {
849 virDomainPtr *new_ptr;
850 int new_size = sizeof (domains[0]) * (nr_domains+1);
852 if (domains)
853 new_ptr = realloc (domains, new_size);
854 else
855 new_ptr = malloc (new_size);
857 if (new_ptr == NULL)
858 return -1;
860 domains = new_ptr;
861 domains[nr_domains] = dom;
862 return nr_domains++;
863 }
865 static void
866 free_block_devices ()
867 {
868 int i;
870 if (block_devices) {
871 for (i = 0; i < nr_block_devices; ++i)
872 sfree (block_devices[i].path);
873 sfree (block_devices);
874 }
875 block_devices = NULL;
876 nr_block_devices = 0;
877 }
879 static int
880 add_block_device (virDomainPtr dom, const char *path)
881 {
882 struct block_device *new_ptr;
883 int new_size = sizeof (block_devices[0]) * (nr_block_devices+1);
884 char *path_copy;
886 path_copy = strdup (path);
887 if (!path_copy)
888 return -1;
890 if (block_devices)
891 new_ptr = realloc (block_devices, new_size);
892 else
893 new_ptr = malloc (new_size);
895 if (new_ptr == NULL) {
896 sfree (path_copy);
897 return -1;
898 }
899 block_devices = new_ptr;
900 block_devices[nr_block_devices].dom = dom;
901 block_devices[nr_block_devices].path = path_copy;
902 return nr_block_devices++;
903 }
905 static void
906 free_interface_devices ()
907 {
908 int i;
910 if (interface_devices) {
911 for (i = 0; i < nr_interface_devices; ++i) {
912 sfree (interface_devices[i].path);
913 sfree (interface_devices[i].address);
914 sfree (interface_devices[i].number);
915 }
916 sfree (interface_devices);
917 }
918 interface_devices = NULL;
919 nr_interface_devices = 0;
920 }
922 static int
923 add_interface_device (virDomainPtr dom, const char *path, const char *address, unsigned int number)
924 {
925 struct interface_device *new_ptr;
926 int new_size = sizeof (interface_devices[0]) * (nr_interface_devices+1);
927 char *path_copy, *address_copy, number_string[15];
929 path_copy = strdup (path);
930 if (!path_copy) return -1;
932 address_copy = strdup (address);
933 if (!address_copy) {
934 sfree(path_copy);
935 return -1;
936 }
938 snprintf(number_string, sizeof (number_string), "interface-%u", number);
940 if (interface_devices)
941 new_ptr = realloc (interface_devices, new_size);
942 else
943 new_ptr = malloc (new_size);
945 if (new_ptr == NULL) {
946 sfree (path_copy);
947 sfree (address_copy);
948 return -1;
949 }
950 interface_devices = new_ptr;
951 interface_devices[nr_interface_devices].dom = dom;
952 interface_devices[nr_interface_devices].path = path_copy;
953 interface_devices[nr_interface_devices].address = address_copy;
954 interface_devices[nr_interface_devices].number = strdup(number_string);
955 return nr_interface_devices++;
956 }
958 static int
959 ignore_device_match (ignorelist_t *il, const char *domname, const char *devpath)
960 {
961 char *name;
962 int n, r;
964 n = sizeof (char) * (strlen (domname) + strlen (devpath) + 2);
965 name = malloc (n);
966 if (name == NULL) {
967 ERROR (PLUGIN_NAME " plugin: malloc failed.");
968 return 0;
969 }
970 ssnprintf (name, n, "%s:%s", domname, devpath);
971 r = ignorelist_match (il, name);
972 sfree (name);
973 return r;
974 }
976 static int
977 lv_shutdown (void)
978 {
979 free_block_devices ();
980 free_interface_devices ();
981 free_domains ();
983 if (conn != NULL)
984 virConnectClose (conn);
985 conn = NULL;
987 ignorelist_free (il_domains);
988 il_domains = NULL;
989 ignorelist_free (il_block_devices);
990 il_block_devices = NULL;
991 ignorelist_free (il_interface_devices);
992 il_interface_devices = NULL;
994 return 0;
995 }
997 void
998 module_register (void)
999 {
1000 plugin_register_config (PLUGIN_NAME,
1001 lv_config,
1002 config_keys, NR_CONFIG_KEYS);
1003 plugin_register_init (PLUGIN_NAME, lv_init);
1004 plugin_register_read (PLUGIN_NAME, lv_read);
1005 plugin_register_shutdown (PLUGIN_NAME, lv_shutdown);
1006 }
1008 /*
1009 * vim: shiftwidth=4 tabstop=8 softtabstop=4 expandtab fdm=marker
1010 */