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"
24 #include "common.h"
25 #include "plugin.h"
26 #include "utils_complain.h"
27 #include "utils_ignorelist.h"
29 #include <libgen.h> /* for basename(3) */
30 #include <libvirt/libvirt.h>
31 #include <libvirt/virterror.h>
32 #include <libxml/parser.h>
33 #include <libxml/tree.h>
34 #include <libxml/xpath.h>
36 /* Plugin name */
37 #define PLUGIN_NAME "virt"
39 static const char *config_keys[] = {"Connection",
41 "RefreshInterval",
43 "Domain",
44 "BlockDevice",
45 "BlockDeviceFormat",
46 "BlockDeviceFormatBasename",
47 "InterfaceDevice",
48 "IgnoreSelected",
50 "HostnameFormat",
51 "InterfaceFormat",
53 "PluginInstanceFormat",
55 NULL};
56 #define NR_CONFIG_KEYS ((sizeof config_keys / sizeof config_keys[0]) - 1)
58 /* Connection. */
59 static virConnectPtr conn = 0;
60 static char *conn_string = NULL;
61 static c_complain_t conn_complain = C_COMPLAIN_INIT_STATIC;
63 /* Seconds between list refreshes, 0 disables completely. */
64 static int interval = 60;
66 /* List of domains, if specified. */
67 static ignorelist_t *il_domains = NULL;
68 /* List of block devices, if specified. */
69 static ignorelist_t *il_block_devices = NULL;
70 /* List of network interface devices, if specified. */
71 static ignorelist_t *il_interface_devices = NULL;
73 static int ignore_device_match(ignorelist_t *, const char *domname,
74 const char *devpath);
76 /* Actual list of block devices found on last refresh. */
77 struct block_device {
78 virDomainPtr dom; /* domain */
79 char *path; /* name of block device */
80 };
82 /* Actual list of network interfaces found on last refresh. */
83 struct interface_device {
84 virDomainPtr dom; /* domain */
85 char *path; /* name of interface device */
86 char *address; /* mac address of interface device */
87 char *number; /* interface device number */
88 };
90 struct lv_read_state {
91 /* Actual list of domains found on last refresh. */
92 virDomainPtr *domains;
93 int nr_domains;
95 struct block_device *block_devices;
96 int nr_block_devices;
98 struct interface_device *interface_devices;
99 int nr_interface_devices;
100 };
102 static struct lv_read_state read_state = {
103 NULL, 0, NULL, 0, NULL, 0,
104 };
106 static void free_domains(struct lv_read_state *state);
107 static int add_domain(struct lv_read_state *state, virDomainPtr dom);
109 static void free_block_devices(struct lv_read_state *state);
110 static int add_block_device(struct lv_read_state *state, virDomainPtr dom,
111 const char *path);
113 static void free_interface_devices(struct lv_read_state *state);
114 static int add_interface_device(struct lv_read_state *state, virDomainPtr dom,
115 const char *path, const char *address,
116 unsigned int number);
118 /* HostnameFormat. */
119 #define HF_MAX_FIELDS 3
121 enum hf_field { hf_none = 0, hf_hostname, hf_name, hf_uuid };
123 static enum hf_field hostname_format[HF_MAX_FIELDS] = {hf_name};
125 /* PluginInstanceFormat */
126 #define PLGINST_MAX_FIELDS 2
128 enum plginst_field { plginst_none = 0, plginst_name, plginst_uuid };
130 static enum plginst_field plugin_instance_format[PLGINST_MAX_FIELDS] = {
131 plginst_none};
133 /* BlockDeviceFormat */
134 enum bd_field { target, source };
136 /* InterfaceFormat. */
137 enum if_field { if_address, if_name, if_number };
139 /* BlockDeviceFormatBasename */
140 _Bool blockdevice_format_basename = 0;
141 static enum bd_field blockdevice_format = target;
142 static enum if_field interface_format = if_name;
144 /* Time that we last refreshed. */
145 static time_t last_refresh = (time_t)0;
147 static int refresh_lists(struct lv_read_state *state);
149 /* ERROR(...) macro for virterrors. */
150 #define VIRT_ERROR(conn, s) \
151 do { \
152 virErrorPtr err; \
153 err = (conn) ? virConnGetLastError((conn)) : virGetLastError(); \
154 if (err) \
155 ERROR("%s: %s", (s), err->message); \
156 } while (0)
158 static void init_value_list(value_list_t *vl, virDomainPtr dom) {
159 int n;
160 const char *name;
161 char uuid[VIR_UUID_STRING_BUFLEN];
163 sstrncpy(vl->plugin, PLUGIN_NAME, sizeof(vl->plugin));
165 vl->host[0] = '\0';
167 /* Construct the hostname field according to HostnameFormat. */
168 for (int i = 0; i < HF_MAX_FIELDS; ++i) {
169 if (hostname_format[i] == hf_none)
170 continue;
172 n = DATA_MAX_NAME_LEN - strlen(vl->host) - 2;
174 if (i > 0 && n >= 1) {
175 strncat(vl->host, ":", 1);
176 n--;
177 }
179 switch (hostname_format[i]) {
180 case hf_none:
181 break;
182 case hf_hostname:
183 strncat(vl->host, hostname_g, n);
184 break;
185 case hf_name:
186 name = virDomainGetName(dom);
187 if (name)
188 strncat(vl->host, name, n);
189 break;
190 case hf_uuid:
191 if (virDomainGetUUIDString(dom, uuid) == 0)
192 strncat(vl->host, uuid, n);
193 break;
194 }
195 }
197 vl->host[sizeof(vl->host) - 1] = '\0';
199 /* Construct the plugin instance field according to PluginInstanceFormat. */
200 for (int i = 0; i < PLGINST_MAX_FIELDS; ++i) {
201 if (plugin_instance_format[i] == plginst_none)
202 continue;
204 n = sizeof(vl->plugin_instance) - strlen(vl->plugin_instance) - 2;
206 if (i > 0 && n >= 1) {
207 strncat(vl->plugin_instance, ":", 1);
208 n--;
209 }
211 switch (plugin_instance_format[i]) {
212 case plginst_none:
213 break;
214 case plginst_name:
215 name = virDomainGetName(dom);
216 if (name)
217 strncat(vl->plugin_instance, name, n);
218 break;
219 case plginst_uuid:
220 if (virDomainGetUUIDString(dom, uuid) == 0)
221 strncat(vl->plugin_instance, uuid, n);
222 break;
223 }
224 }
226 vl->plugin_instance[sizeof(vl->plugin_instance) - 1] = '\0';
228 } /* void init_value_list */
230 static void submit(virDomainPtr dom, char const *type,
231 char const *type_instance, value_t *values,
232 size_t values_len) {
233 value_list_t vl = VALUE_LIST_INIT;
234 init_value_list(&vl, dom);
236 vl.values = values;
237 vl.values_len = values_len;
239 sstrncpy(vl.type, type, sizeof(vl.type));
240 if (type_instance != NULL)
241 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
243 plugin_dispatch_values(&vl);
244 }
246 static void memory_submit(gauge_t value, virDomainPtr dom) {
247 submit(dom, "memory", "total", &(value_t){.gauge = value}, 1);
248 }
250 static void memory_stats_submit(gauge_t value, virDomainPtr dom,
251 int tag_index) {
252 static const char *tags[] = {"swap_in", "swap_out", "major_fault",
253 "minor_fault", "unused", "available",
254 "actual_balloon", "rss"};
256 if ((tag_index < 0) || (tag_index >= STATIC_ARRAY_SIZE(tags))) {
257 ERROR("virt plugin: Array index out of bounds: tag_index = %d", tag_index);
258 return;
259 }
261 submit(dom, "memory", tags[tag_index], &(value_t){.gauge = value}, 1);
262 }
264 static void cpu_submit(unsigned long long value, virDomainPtr dom,
265 const char *type) {
266 submit(dom, type, NULL, &(value_t){.derive = (derive_t)value}, 1);
267 }
269 static void vcpu_submit(derive_t value, virDomainPtr dom, int vcpu_nr,
270 const char *type) {
271 char type_instance[DATA_MAX_NAME_LEN];
273 ssnprintf(type_instance, sizeof(type_instance), "%d", vcpu_nr);
275 submit(dom, type, type_instance, &(value_t){.derive = value}, 1);
276 }
278 static void submit_derive2(const char *type, derive_t v0, derive_t v1,
279 virDomainPtr dom, const char *devname) {
280 value_t values[] = {
281 {.derive = v0}, {.derive = v1},
282 };
284 submit(dom, type, devname, values, STATIC_ARRAY_SIZE(values));
285 } /* void submit_derive2 */
287 static int lv_init(void) {
288 if (virInitialize() != 0)
289 return -1;
290 else
291 return 0;
292 }
294 static int lv_config(const char *key, const char *value) {
295 if (virInitialize() != 0)
296 return 1;
298 if (il_domains == NULL)
299 il_domains = ignorelist_create(1);
300 if (il_block_devices == NULL)
301 il_block_devices = ignorelist_create(1);
302 if (il_interface_devices == NULL)
303 il_interface_devices = ignorelist_create(1);
305 if (strcasecmp(key, "Connection") == 0) {
306 char *tmp = strdup(value);
307 if (tmp == NULL) {
308 ERROR(PLUGIN_NAME " plugin: Connection strdup failed.");
309 return 1;
310 }
311 sfree(conn_string);
312 conn_string = tmp;
313 return 0;
314 }
316 if (strcasecmp(key, "RefreshInterval") == 0) {
317 char *eptr = NULL;
318 interval = strtol(value, &eptr, 10);
319 if (eptr == NULL || *eptr != '\0')
320 return 1;
321 return 0;
322 }
324 if (strcasecmp(key, "Domain") == 0) {
325 if (ignorelist_add(il_domains, value))
326 return 1;
327 return 0;
328 }
329 if (strcasecmp(key, "BlockDevice") == 0) {
330 if (ignorelist_add(il_block_devices, value))
331 return 1;
332 return 0;
333 }
335 if (strcasecmp(key, "BlockDeviceFormat") == 0) {
336 if (strcasecmp(value, "target") == 0)
337 blockdevice_format = target;
338 else if (strcasecmp(value, "source") == 0)
339 blockdevice_format = source;
340 else {
341 ERROR(PLUGIN_NAME " plugin: unknown BlockDeviceFormat: %s", value);
342 return -1;
343 }
344 return 0;
345 }
346 if (strcasecmp(key, "BlockDeviceFormatBasename") == 0) {
347 blockdevice_format_basename = IS_TRUE(value);
348 return 0;
349 }
350 if (strcasecmp(key, "InterfaceDevice") == 0) {
351 if (ignorelist_add(il_interface_devices, value))
352 return 1;
353 return 0;
354 }
356 if (strcasecmp(key, "IgnoreSelected") == 0) {
357 if (IS_TRUE(value)) {
358 ignorelist_set_invert(il_domains, 0);
359 ignorelist_set_invert(il_block_devices, 0);
360 ignorelist_set_invert(il_interface_devices, 0);
361 } else {
362 ignorelist_set_invert(il_domains, 1);
363 ignorelist_set_invert(il_block_devices, 1);
364 ignorelist_set_invert(il_interface_devices, 1);
365 }
366 return 0;
367 }
369 if (strcasecmp(key, "HostnameFormat") == 0) {
370 char *value_copy;
371 char *fields[HF_MAX_FIELDS];
372 int n;
374 value_copy = strdup(value);
375 if (value_copy == NULL) {
376 ERROR(PLUGIN_NAME " plugin: strdup failed.");
377 return -1;
378 }
380 n = strsplit(value_copy, fields, HF_MAX_FIELDS);
381 if (n < 1) {
382 sfree(value_copy);
383 ERROR(PLUGIN_NAME " plugin: HostnameFormat: no fields");
384 return -1;
385 }
387 for (int i = 0; i < n; ++i) {
388 if (strcasecmp(fields[i], "hostname") == 0)
389 hostname_format[i] = hf_hostname;
390 else if (strcasecmp(fields[i], "name") == 0)
391 hostname_format[i] = hf_name;
392 else if (strcasecmp(fields[i], "uuid") == 0)
393 hostname_format[i] = hf_uuid;
394 else {
395 ERROR(PLUGIN_NAME " plugin: unknown HostnameFormat field: %s",
396 fields[i]);
397 sfree(value_copy);
398 return -1;
399 }
400 }
401 sfree(value_copy);
403 for (int i = n; i < HF_MAX_FIELDS; ++i)
404 hostname_format[i] = hf_none;
406 return 0;
407 }
409 if (strcasecmp(key, "PluginInstanceFormat") == 0) {
410 char *value_copy;
411 char *fields[PLGINST_MAX_FIELDS];
412 int n;
414 value_copy = strdup(value);
415 if (value_copy == NULL) {
416 ERROR(PLUGIN_NAME " plugin: strdup failed.");
417 return -1;
418 }
420 n = strsplit(value_copy, fields, PLGINST_MAX_FIELDS);
421 if (n < 1) {
422 sfree(value_copy);
423 ERROR(PLUGIN_NAME " plugin: PluginInstanceFormat: no fields");
424 return -1;
425 }
427 for (int i = 0; i < n; ++i) {
428 if (strcasecmp(fields[i], "none") == 0) {
429 plugin_instance_format[i] = plginst_none;
430 break;
431 } else if (strcasecmp(fields[i], "name") == 0)
432 plugin_instance_format[i] = plginst_name;
433 else if (strcasecmp(fields[i], "uuid") == 0)
434 plugin_instance_format[i] = plginst_uuid;
435 else {
436 ERROR(PLUGIN_NAME " plugin: unknown PluginInstanceFormat field: %s",
437 fields[i]);
438 sfree(value_copy);
439 return -1;
440 }
441 }
442 sfree(value_copy);
444 for (int i = n; i < PLGINST_MAX_FIELDS; ++i)
445 plugin_instance_format[i] = plginst_none;
447 return 0;
448 }
450 if (strcasecmp(key, "InterfaceFormat") == 0) {
451 if (strcasecmp(value, "name") == 0)
452 interface_format = if_name;
453 else if (strcasecmp(value, "address") == 0)
454 interface_format = if_address;
455 else if (strcasecmp(value, "number") == 0)
456 interface_format = if_number;
457 else {
458 ERROR(PLUGIN_NAME " plugin: unknown InterfaceFormat: %s", value);
459 return -1;
460 }
461 return 0;
462 }
464 /* Unrecognised option. */
465 return -1;
466 }
468 static int lv_read(void) {
469 time_t t;
470 struct lv_read_state *state = &read_state;
472 if (conn == NULL) {
473 /* `conn_string == NULL' is acceptable. */
474 conn = virConnectOpenReadOnly(conn_string);
475 if (conn == NULL) {
476 c_complain(LOG_ERR, &conn_complain,
477 PLUGIN_NAME " plugin: Unable to connect: "
478 "virConnectOpenReadOnly failed.");
479 return -1;
480 }
481 }
482 c_release(LOG_NOTICE, &conn_complain,
483 PLUGIN_NAME " plugin: Connection established.");
485 time(&t);
487 /* Need to refresh domain or device lists? */
488 if ((last_refresh == (time_t)0) ||
489 ((interval > 0) && ((last_refresh + interval) <= t))) {
490 if (refresh_lists(state) != 0) {
491 if (conn != NULL)
492 virConnectClose(conn);
493 conn = NULL;
494 return -1;
495 }
496 last_refresh = t;
497 }
499 #if 0
500 for (int i = 0; i < nr_domains; ++i)
501 fprintf (stderr, "domain %s\n", virDomainGetName (domains[i]));
502 for (int i = 0; i < nr_block_devices; ++i)
503 fprintf (stderr, "block device %d %s:%s\n",
504 i, virDomainGetName (block_devices[i].dom),
505 block_devices[i].path);
506 for (int i = 0; i < nr_interface_devices; ++i)
507 fprintf (stderr, "interface device %d %s:%s\n",
508 i, virDomainGetName (interface_devices[i].dom),
509 interface_devices[i].path);
510 #endif
512 /* Get CPU usage, memory, VCPU usage for each domain. */
513 for (int i = 0; i < state->nr_domains; ++i) {
514 virDomainInfo info;
515 virVcpuInfoPtr vinfo = NULL;
516 virDomainMemoryStatPtr minfo = NULL;
517 int status;
519 status = virDomainGetInfo(state->domains[i], &info);
520 if (status != 0) {
521 ERROR(PLUGIN_NAME " plugin: virDomainGetInfo failed with status %i.",
522 status);
523 continue;
524 }
526 if (info.state != VIR_DOMAIN_RUNNING) {
527 /* only gather stats for running domains */
528 continue;
529 }
531 cpu_submit(info.cpuTime, state->domains[i], "virt_cpu_total");
532 memory_submit((gauge_t)info.memory * 1024, state->domains[i]);
534 vinfo = malloc(info.nrVirtCpu * sizeof(vinfo[0]));
535 if (vinfo == NULL) {
536 ERROR(PLUGIN_NAME " plugin: malloc failed.");
537 continue;
538 }
540 status = virDomainGetVcpus(state->domains[i], vinfo, info.nrVirtCpu,
541 /* cpu map = */ NULL, /* cpu map length = */ 0);
542 if (status < 0) {
543 ERROR(PLUGIN_NAME " plugin: virDomainGetVcpus failed with status %i.",
544 status);
545 sfree(vinfo);
546 continue;
547 }
549 for (int j = 0; j < info.nrVirtCpu; ++j)
550 vcpu_submit(vinfo[j].cpuTime, state->domains[i], vinfo[j].number,
551 "virt_vcpu");
553 sfree(vinfo);
555 minfo =
556 malloc(VIR_DOMAIN_MEMORY_STAT_NR * sizeof(virDomainMemoryStatStruct));
557 if (minfo == NULL) {
558 ERROR("virt plugin: malloc failed.");
559 continue;
560 }
562 status = virDomainMemoryStats(state->domains[i], minfo,
563 VIR_DOMAIN_MEMORY_STAT_NR, 0);
565 if (status < 0) {
566 ERROR("virt plugin: virDomainMemoryStats failed with status %i.", status);
567 sfree(minfo);
568 continue;
569 }
571 for (int j = 0; j < status; j++) {
572 memory_stats_submit((gauge_t)minfo[j].val * 1024, state->domains[i],
573 minfo[j].tag);
574 }
576 sfree(minfo);
577 }
579 /* Get block device stats for each domain. */
580 for (int i = 0; i < state->nr_block_devices; ++i) {
581 struct _virDomainBlockStats stats;
583 if (virDomainBlockStats(state->block_devices[i].dom,
584 state->block_devices[i].path, &stats,
585 sizeof stats) != 0)
586 continue;
588 char *type_instance = NULL;
589 if (blockdevice_format_basename && blockdevice_format == source)
590 type_instance = strdup(basename(state->block_devices[i].path));
591 else
592 type_instance = strdup(state->block_devices[i].path);
594 if ((stats.rd_req != -1) && (stats.wr_req != -1))
595 submit_derive2("disk_ops", (derive_t)stats.rd_req, (derive_t)stats.wr_req,
596 state->block_devices[i].dom, type_instance);
598 if ((stats.rd_bytes != -1) && (stats.wr_bytes != -1))
599 submit_derive2("disk_octets", (derive_t)stats.rd_bytes,
600 (derive_t)stats.wr_bytes, state->block_devices[i].dom,
601 type_instance);
603 sfree(type_instance);
604 } /* for (nr_block_devices) */
606 /* Get interface stats for each domain. */
607 for (int i = 0; i < state->nr_interface_devices; ++i) {
608 struct _virDomainInterfaceStats stats;
609 char *display_name = NULL;
611 switch (interface_format) {
612 case if_address:
613 display_name = state->interface_devices[i].address;
614 break;
615 case if_number:
616 display_name = state->interface_devices[i].number;
617 break;
618 case if_name:
619 default:
620 display_name = state->interface_devices[i].path;
621 }
623 if (virDomainInterfaceStats(state->interface_devices[i].dom,
624 state->interface_devices[i].path, &stats,
625 sizeof stats) != 0)
626 continue;
628 if ((stats.rx_bytes != -1) && (stats.tx_bytes != -1))
629 submit_derive2("if_octets", (derive_t)stats.rx_bytes,
630 (derive_t)stats.tx_bytes, state->interface_devices[i].dom,
631 display_name);
633 if ((stats.rx_packets != -1) && (stats.tx_packets != -1))
634 submit_derive2("if_packets", (derive_t)stats.rx_packets,
635 (derive_t)stats.tx_packets,
636 state->interface_devices[i].dom, display_name);
638 if ((stats.rx_errs != -1) && (stats.tx_errs != -1))
639 submit_derive2("if_errors", (derive_t)stats.rx_errs,
640 (derive_t)stats.tx_errs, state->interface_devices[i].dom,
641 display_name);
643 if ((stats.rx_drop != -1) && (stats.tx_drop != -1))
644 submit_derive2("if_dropped", (derive_t)stats.rx_drop,
645 (derive_t)stats.tx_drop, state->interface_devices[i].dom,
646 display_name);
647 } /* for (nr_interface_devices) */
649 return 0;
650 }
652 static int refresh_lists(struct lv_read_state *state) {
653 int n;
655 n = virConnectNumOfDomains(conn);
656 if (n < 0) {
657 VIRT_ERROR(conn, "reading number of domains");
658 return -1;
659 }
661 if (n > 0) {
662 int *domids;
664 /* Get list of domains. */
665 domids = malloc(sizeof(*domids) * n);
666 if (domids == NULL) {
667 ERROR(PLUGIN_NAME " plugin: malloc failed.");
668 return -1;
669 }
671 n = virConnectListDomains(conn, domids, n);
672 if (n < 0) {
673 VIRT_ERROR(conn, "reading list of domains");
674 sfree(domids);
675 return -1;
676 }
678 free_block_devices(state);
679 free_interface_devices(state);
680 free_domains(state);
682 /* Fetch each domain and add it to the list, unless ignore. */
683 for (int i = 0; i < n; ++i) {
684 virDomainPtr dom = NULL;
685 const char *name;
686 char *xml = NULL;
687 xmlDocPtr xml_doc = NULL;
688 xmlXPathContextPtr xpath_ctx = NULL;
689 xmlXPathObjectPtr xpath_obj = NULL;
691 dom = virDomainLookupByID(conn, domids[i]);
692 if (dom == NULL) {
693 VIRT_ERROR(conn, "virDomainLookupByID");
694 /* Could be that the domain went away -- ignore it anyway. */
695 continue;
696 }
698 name = virDomainGetName(dom);
699 if (name == NULL) {
700 VIRT_ERROR(conn, "virDomainGetName");
701 goto cont;
702 }
704 if (il_domains && ignorelist_match(il_domains, name) != 0)
705 goto cont;
707 if (add_domain(state, dom) < 0) {
708 ERROR(PLUGIN_NAME " plugin: malloc failed.");
709 goto cont;
710 }
712 /* Get a list of devices for this domain. */
713 xml = virDomainGetXMLDesc(dom, 0);
714 if (!xml) {
715 VIRT_ERROR(conn, "virDomainGetXMLDesc");
716 goto cont;
717 }
719 /* Yuck, XML. Parse out the devices. */
720 xml_doc = xmlReadDoc((xmlChar *)xml, NULL, NULL, XML_PARSE_NONET);
721 if (xml_doc == NULL) {
722 VIRT_ERROR(conn, "xmlReadDoc");
723 goto cont;
724 }
726 xpath_ctx = xmlXPathNewContext(xml_doc);
728 /* Block devices. */
729 char *bd_xmlpath = "/domain/devices/disk/target[@dev]";
730 if (blockdevice_format == source)
731 bd_xmlpath = "/domain/devices/disk/source[@dev]";
732 xpath_obj = xmlXPathEval((xmlChar *)bd_xmlpath, xpath_ctx);
734 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
735 xpath_obj->nodesetval == NULL)
736 goto cont;
738 for (int j = 0; j < xpath_obj->nodesetval->nodeNr; ++j) {
739 xmlNodePtr node;
740 char *path = NULL;
742 node = xpath_obj->nodesetval->nodeTab[j];
743 if (!node)
744 continue;
745 path = (char *)xmlGetProp(node, (xmlChar *)"dev");
746 if (!path)
747 continue;
749 if (il_block_devices &&
750 ignore_device_match(il_block_devices, name, path) != 0)
751 goto cont2;
753 add_block_device(state, dom, path);
754 cont2:
755 if (path)
756 xmlFree(path);
757 }
758 xmlXPathFreeObject(xpath_obj);
760 /* Network interfaces. */
761 xpath_obj = xmlXPathEval(
762 (xmlChar *)"/domain/devices/interface[target[@dev]]", xpath_ctx);
763 if (xpath_obj == NULL || xpath_obj->type != XPATH_NODESET ||
764 xpath_obj->nodesetval == NULL)
765 goto cont;
767 xmlNodeSetPtr xml_interfaces = xpath_obj->nodesetval;
769 for (int j = 0; j < xml_interfaces->nodeNr; ++j) {
770 char *path = NULL;
771 char *address = NULL;
772 xmlNodePtr xml_interface;
774 xml_interface = xml_interfaces->nodeTab[j];
775 if (!xml_interface)
776 continue;
778 for (xmlNodePtr child = xml_interface->children; child;
779 child = child->next) {
780 if (child->type != XML_ELEMENT_NODE)
781 continue;
783 if (xmlStrEqual(child->name, (const xmlChar *)"target")) {
784 path = (char *)xmlGetProp(child, (const xmlChar *)"dev");
785 if (!path)
786 continue;
787 } else if (xmlStrEqual(child->name, (const xmlChar *)"mac")) {
788 address = (char *)xmlGetProp(child, (const xmlChar *)"address");
789 if (!address)
790 continue;
791 }
792 }
794 if (il_interface_devices &&
795 (ignore_device_match(il_interface_devices, name, path) != 0 ||
796 ignore_device_match(il_interface_devices, name, address) != 0))
797 goto cont3;
799 add_interface_device(state, dom, path, address, j + 1);
800 cont3:
801 if (path)
802 xmlFree(path);
803 if (address)
804 xmlFree(address);
805 }
807 cont:
808 if (xpath_obj)
809 xmlXPathFreeObject(xpath_obj);
810 if (xpath_ctx)
811 xmlXPathFreeContext(xpath_ctx);
812 if (xml_doc)
813 xmlFreeDoc(xml_doc);
814 sfree(xml);
815 }
817 sfree(domids);
818 }
820 return 0;
821 }
823 static void free_domains(struct lv_read_state *state) {
824 if (state->domains) {
825 for (int i = 0; i < state->nr_domains; ++i)
826 virDomainFree(state->domains[i]);
827 sfree(state->domains);
828 }
829 state->domains = NULL;
830 state->nr_domains = 0;
831 }
833 static int add_domain(struct lv_read_state *state, virDomainPtr dom) {
834 virDomainPtr *new_ptr;
835 int new_size = sizeof(state->domains[0]) * (state->nr_domains + 1);
837 if (state->domains)
838 new_ptr = realloc(state->domains, new_size);
839 else
840 new_ptr = malloc(new_size);
842 if (new_ptr == NULL)
843 return -1;
845 state->domains = new_ptr;
846 state->domains[state->nr_domains] = dom;
847 return state->nr_domains++;
848 }
850 static void free_block_devices(struct lv_read_state *state) {
851 if (state->block_devices) {
852 for (int i = 0; i < state->nr_block_devices; ++i)
853 sfree(state->block_devices[i].path);
854 sfree(state->block_devices);
855 }
856 state->block_devices = NULL;
857 state->nr_block_devices = 0;
858 }
860 static int add_block_device(struct lv_read_state *state, virDomainPtr dom,
861 const char *path) {
862 struct block_device *new_ptr;
863 int new_size =
864 sizeof(state->block_devices[0]) * (state->nr_block_devices + 1);
865 char *path_copy;
867 path_copy = strdup(path);
868 if (!path_copy)
869 return -1;
871 if (state->block_devices)
872 new_ptr = realloc(state->block_devices, new_size);
873 else
874 new_ptr = malloc(new_size);
876 if (new_ptr == NULL) {
877 sfree(path_copy);
878 return -1;
879 }
880 state->block_devices = new_ptr;
881 state->block_devices[state->nr_block_devices].dom = dom;
882 state->block_devices[state->nr_block_devices].path = path_copy;
883 return state->nr_block_devices++;
884 }
886 static void free_interface_devices(struct lv_read_state *state) {
887 if (state->interface_devices) {
888 for (int i = 0; i < state->nr_interface_devices; ++i) {
889 sfree(state->interface_devices[i].path);
890 sfree(state->interface_devices[i].address);
891 sfree(state->interface_devices[i].number);
892 }
893 sfree(state->interface_devices);
894 }
895 state->interface_devices = NULL;
896 state->nr_interface_devices = 0;
897 }
899 static int add_interface_device(struct lv_read_state *state, virDomainPtr dom,
900 const char *path, const char *address,
901 unsigned int number) {
902 struct interface_device *new_ptr;
903 int new_size =
904 sizeof(state->interface_devices[0]) * (state->nr_interface_devices + 1);
905 char *path_copy, *address_copy, number_string[15];
907 if ((path == NULL) || (address == NULL))
908 return EINVAL;
910 path_copy = strdup(path);
911 if (!path_copy)
912 return -1;
914 address_copy = strdup(address);
915 if (!address_copy) {
916 sfree(path_copy);
917 return -1;
918 }
920 snprintf(number_string, sizeof(number_string), "interface-%u", number);
922 if (state->interface_devices)
923 new_ptr = realloc(state->interface_devices, new_size);
924 else
925 new_ptr = malloc(new_size);
927 if (new_ptr == NULL) {
928 sfree(path_copy);
929 sfree(address_copy);
930 return -1;
931 }
932 state->interface_devices = new_ptr;
933 state->interface_devices[state->nr_interface_devices].dom = dom;
934 state->interface_devices[state->nr_interface_devices].path = path_copy;
935 state->interface_devices[state->nr_interface_devices].address = address_copy;
936 state->interface_devices[state->nr_interface_devices].number =
937 strdup(number_string);
938 return state->nr_interface_devices++;
939 }
941 static int ignore_device_match(ignorelist_t *il, const char *domname,
942 const char *devpath) {
943 char *name;
944 int n, r;
946 if ((domname == NULL) || (devpath == NULL))
947 return 0;
949 n = sizeof(char) * (strlen(domname) + strlen(devpath) + 2);
950 name = malloc(n);
951 if (name == NULL) {
952 ERROR(PLUGIN_NAME " plugin: malloc failed.");
953 return 0;
954 }
955 ssnprintf(name, n, "%s:%s", domname, devpath);
956 r = ignorelist_match(il, name);
957 sfree(name);
958 return r;
959 }
961 static int lv_shutdown(void) {
962 struct lv_read_state *state = &read_state;
963 free_block_devices(state);
964 free_interface_devices(state);
965 free_domains(state);
967 if (conn != NULL)
968 virConnectClose(conn);
969 conn = NULL;
971 ignorelist_free(il_domains);
972 il_domains = NULL;
973 ignorelist_free(il_block_devices);
974 il_block_devices = NULL;
975 ignorelist_free(il_interface_devices);
976 il_interface_devices = NULL;
978 return 0;
979 }
981 void module_register(void) {
982 plugin_register_config(PLUGIN_NAME, lv_config, config_keys, NR_CONFIG_KEYS);
983 plugin_register_init(PLUGIN_NAME, lv_init);
984 plugin_register_read(PLUGIN_NAME, lv_read);
985 plugin_register_shutdown(PLUGIN_NAME, lv_shutdown);
986 }
988 /*
989 * vim: shiftwidth=4 tabstop=8 softtabstop=4 expandtab fdm=marker
990 */