1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
|
/*
* virterror.c: implements error handling and reporting code for libvirt
*
* Copy: Copyright (C) 2006 Red Hat, Inc.
*
* See COPYING.LIB for the License of this software
*
* Author: Daniel Veillard <veillard@redhat.com>
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "internal.h"
#include "libvirt/virterror.h"
virError __lastErr = /* the last error */
{ .code = 0, .domain = 0, .message = NULL, .level = VIR_ERR_NONE,
.conn = NULL, .dom = NULL, .str1 = NULL, .str2 = NULL, .str3 = NULL,
.int1 = 0, .int2 = 0, .net = NULL };
static virErrorFunc virErrorHandler = NULL; /* global error handler */
static void *virUserData = NULL; /* associated data */
/*
* Macro used to format the message as a string in __virRaiseError
* and borrowed from libxml2.
*/
#define VIR_GET_VAR_STR(msg, str) { \
int size, prev_size = -1; \
int chars; \
char *larger; \
va_list ap; \
\
str = (char *) malloc(150); \
if (str != NULL) { \
\
size = 150; \
\
while (1) { \
va_start(ap, msg); \
chars = vsnprintf(str, size, msg, ap); \
va_end(ap); \
if ((chars > -1) && (chars < size)) { \
if (prev_size == chars) { \
break; \
} else { \
prev_size = chars; \
} \
} \
if (chars > -1) \
size += chars + 1; \
else \
size += 100; \
if ((larger = (char *) realloc(str, size)) == NULL) { \
break; \
} \
str = larger; \
}} \
}
/*
* virGetLastError:
*
* Provide a pointer to the last error caught at the library level
* Simpler but may not be suitable for multithreaded accesses, in which
* case use virCopyLastError()
*
* Returns a pointer to the last error or NULL if none occurred.
*/
virErrorPtr
virGetLastError(void)
{
if (__lastErr.code == VIR_ERR_OK)
return (NULL);
return (&__lastErr);
}
/*
* virCopyLastError:
* @to: target to receive the copy
*
* Copy the content of the last error caught at the library level
* One will need to free the result with virResetError()
*
* Returns 0 if no error was found and the error code otherwise and -1 in case
* of parameter error.
*/
int
virCopyLastError(virErrorPtr to)
{
if (to == NULL)
return (-1);
if (__lastErr.code == VIR_ERR_OK)
return (0);
memcpy(to, &__lastErr, sizeof(virError));
return (__lastErr.code);
}
/**
* virResetError:
* @err: pointer to the virError to clean up
*
* Reset the error being pointed to
*/
void
virResetError(virErrorPtr err)
{
if (err == NULL)
return;
free(err->message);
free(err->str1);
free(err->str2);
free(err->str3);
memset(err, 0, sizeof(virError));
}
/**
* virResetLastError:
*
* Reset the last error caught at the library level.
*/
void
virResetLastError(void)
{
virResetError(&__lastErr);
}
/**
* virConnGetLastError:
* @conn: pointer to the hypervisor connection
*
* Provide a pointer to the last error caught on that connection
* Simpler but may not be suitable for multithreaded accesses, in which
* case use virConnCopyLastError()
*
* Returns a pointer to the last error or NULL if none occurred.
*/
virErrorPtr
virConnGetLastError(virConnectPtr conn)
{
if (conn == NULL)
return (NULL);
return (&conn->err);
}
/**
* virConnCopyLastError:
* @conn: pointer to the hypervisor connection
* @to: target to receive the copy
*
* Copy the content of the last error caught on that connection
* One will need to free the result with virResetError()
*
* Returns 0 if no error was found and the error code otherwise and -1 in case
* of parameter error.
*/
int
virConnCopyLastError(virConnectPtr conn, virErrorPtr to)
{
if (conn == NULL)
return (-1);
if (to == NULL)
return (-1);
if (conn->err.code == VIR_ERR_OK)
return (0);
memcpy(to, &conn->err, sizeof(virError));
return (conn->err.code);
}
/**
* virConnResetLastError:
* @conn: pointer to the hypervisor connection
*
* Reset the last error caught on that connection
*/
void
virConnResetLastError(virConnectPtr conn)
{
if (conn == NULL)
return;
virResetError(&conn->err);
}
/**
* virSetErrorFunc:
* @userData: pointer to the user data provided in the handler callback
* @handler: the function to get called in case of error or NULL
*
* Set a library global error handling function, if @handler is NULL,
* it will reset to default printing on stderr. The error raised there
* are those for which no handler at the connection level could caught.
*/
void
virSetErrorFunc(void *userData, virErrorFunc handler)
{
virErrorHandler = handler;
virUserData = userData;
}
/**
* virConnSetErrorFunc:
* @conn: pointer to the hypervisor connection
* @userData: pointer to the user data provided in the handler callback
* @handler: the function to get called in case of error or NULL
*
* Set a connection error handling function, if @handler is NULL
* it will reset to default which is to pass error back to the global
* library handler.
*/
void
virConnSetErrorFunc(virConnectPtr conn, void *userData,
virErrorFunc handler)
{
if (conn == NULL)
return;
conn->handler = handler;
conn->userData = userData;
}
/**
* virDefaultErrorFunc:
* @err: pointer to the error.
*
* Default routine reporting an error to stderr.
*/
void
virDefaultErrorFunc(virErrorPtr err)
{
const char *lvl = "", *dom = "", *domain = "", *network = "";
int len;
if ((err == NULL) || (err->code == VIR_ERR_OK))
return;
switch (err->level) {
case VIR_ERR_NONE:
lvl = "";
break;
case VIR_ERR_WARNING:
lvl = _("warning");
break;
case VIR_ERR_ERROR:
lvl = _("error");
break;
}
switch (err->domain) {
case VIR_FROM_NONE:
dom = "";
break;
case VIR_FROM_XEN:
dom = "Xen ";
break;
case VIR_FROM_XML:
dom = "XML ";
break;
case VIR_FROM_XEND:
dom = "Xen Daemon ";
break;
case VIR_FROM_XENSTORE:
dom = "Xen Store ";
break;
case VIR_FROM_DOM:
dom = "Domain ";
break;
case VIR_FROM_RPC:
dom = "XML-RPC ";
break;
case VIR_FROM_QEMU:
dom = "QEMU ";
break;
case VIR_FROM_NET:
dom = "Network ";
break;
case VIR_FROM_TEST:
dom = "Test ";
break;
case VIR_FROM_REMOTE:
dom = "Remote ";
break;
case VIR_FROM_SEXPR:
dom = "S-Expr ";
break;
case VIR_FROM_PROXY:
dom = "PROXY ";
break;
case VIR_FROM_CONF:
dom = "Config ";
break;
case VIR_FROM_OPENVZ:
dom = "OpenVZ ";
break;
case VIR_FROM_XENXM:
dom = "Xen XM ";
break;
case VIR_FROM_STATS_LINUX:
dom = "Linux Stats ";
break;
case VIR_FROM_LXC:
dom = "Linux Container ";
break;
case VIR_FROM_STORAGE:
dom = "Storage ";
break;
case VIR_FROM_NETWORK:
dom = "Network Config ";
break;
case VIR_FROM_DOMAIN:
dom = "Domain Config ";
break;
}
if ((err->dom != NULL) && (err->code != VIR_ERR_INVALID_DOMAIN)) {
domain = err->dom->name;
} else if ((err->net != NULL) && (err->code != VIR_ERR_INVALID_NETWORK)) {
network = err->net->name;
}
len = strlen(err->message);
if ((err->domain == VIR_FROM_XML) && (err->code == VIR_ERR_XML_DETAIL) &&
(err->int1 != 0))
fprintf(stderr, "libvir: %s%s %s%s: line %d: %s",
dom, lvl, domain, network, err->int1, err->message);
else if ((len == 0) || (err->message[len - 1] != '\n'))
fprintf(stderr, "libvir: %s%s %s%s: %s\n",
dom, lvl, domain, network, err->message);
else
fprintf(stderr, "libvir: %s%s %s%s: %s",
dom, lvl, domain, network, err->message);
}
/**
* __virRaiseError:
* @conn: the connection to the hypervisor if available
* @dom: the domain if available
* @net: the network if available
* @domain: the virErrorDomain indicating where it's coming from
* @code: the virErrorNumber code for the error
* @level: the virErrorLevel for the error
* @str1: extra string info
* @str2: extra string info
* @str3: extra string info
* @int1: extra int info
* @int2: extra int info
* @msg: the message to display/transmit
* @...: extra parameters for the message display
*
* Internal routine called when an error is detected. It will raise it
* immediately if a callback is found and store it for later handling.
*/
void
__virRaiseError(virConnectPtr conn, virDomainPtr dom, virNetworkPtr net,
int domain, int code, virErrorLevel level,
const char *str1, const char *str2, const char *str3,
int int1, int int2, const char *msg, ...)
{
virErrorPtr to = &__lastErr;
void *userData = virUserData;
virErrorFunc handler = virErrorHandler;
char *str;
if (code == VIR_ERR_OK)
return;
/*
* try to find the best place to save and report the error
*/
if (conn != NULL) {
to = &conn->err;
if (conn->handler != NULL) {
handler = conn->handler;
userData = conn->userData;
}
}
/*
* formats the message
*/
if (msg == NULL) {
str = strdup(_("No error message provided"));
} else {
VIR_GET_VAR_STR(msg, str);
}
/*
* Save the information about the error
*/
virResetError(to);
to->conn = conn;
to->dom = dom;
to->net = net;
to->domain = domain;
to->code = code;
to->message = str;
to->level = level;
if (str1 != NULL)
to->str1 = strdup(str1);
if (str2 != NULL)
to->str2 = strdup(str2);
if (str3 != NULL)
to->str3 = strdup(str3);
to->int1 = int1;
to->int2 = int2;
/*
* now, report it
*/
if (handler != NULL) {
handler(userData, to);
} else {
virDefaultErrorFunc(to);
}
}
/**
* __virErrorMsg:
* @error: the virErrorNumber
* @info: usually the first parameter string
*
* Internal routine to get the message associated to an error raised
* from the library
*
* Returns the constant string associated to @error
*/
const char *
__virErrorMsg(virErrorNumber error, const char *info)
{
const char *errmsg = NULL;
switch (error) {
case VIR_ERR_OK:
return (NULL);
case VIR_ERR_INTERNAL_ERROR:
if (info != NULL)
errmsg = _("internal error %s");
else
errmsg = _("internal error");
break;
case VIR_ERR_NO_MEMORY:
errmsg = _("out of memory");
break;
case VIR_ERR_NO_SUPPORT:
if (info == NULL)
errmsg = _("this function is not supported by the hypervisor");
else
errmsg = _("this function is not supported by the hypervisor: %s");
break;
case VIR_ERR_NO_CONNECT:
if (info == NULL)
errmsg = _("could not connect to hypervisor");
else
errmsg = _("could not connect to %s");
break;
case VIR_ERR_INVALID_CONN:
if (info == NULL)
errmsg = _("invalid connection pointer in");
else
errmsg = _("invalid connection pointer in %s");
break;
case VIR_ERR_INVALID_DOMAIN:
if (info == NULL)
errmsg = _("invalid domain pointer in");
else
errmsg = _("invalid domain pointer in %s");
break;
case VIR_ERR_INVALID_ARG:
if (info == NULL)
errmsg = _("invalid argument in");
else
errmsg = _("invalid argument in %s");
break;
case VIR_ERR_OPERATION_FAILED:
if (info != NULL)
errmsg = _("operation failed: %s");
else
errmsg = _("operation failed");
break;
case VIR_ERR_GET_FAILED:
if (info != NULL)
errmsg = _("GET operation failed: %s");
else
errmsg = _("GET operation failed");
break;
case VIR_ERR_POST_FAILED:
if (info != NULL)
errmsg = _("POST operation failed: %s");
else
errmsg = _("POST operation failed");
break;
case VIR_ERR_HTTP_ERROR:
errmsg = _("got unknown HTTP error code %d");
break;
case VIR_ERR_UNKNOWN_HOST:
if (info != NULL)
errmsg = _("unknown host %s");
else
errmsg = _("unknown host");
break;
case VIR_ERR_SEXPR_SERIAL:
if (info != NULL)
errmsg = _("failed to serialize S-Expr: %s");
else
errmsg = _("failed to serialize S-Expr");
break;
case VIR_ERR_NO_XEN:
if (info == NULL)
errmsg = _("could not use Xen hypervisor entry");
else
errmsg = _("could not use Xen hypervisor entry %s");
break;
case VIR_ERR_NO_XENSTORE:
if (info == NULL)
errmsg = _("could not connect to Xen Store");
else
errmsg = _("could not connect to Xen Store %s");
break;
case VIR_ERR_XEN_CALL:
errmsg = _("failed Xen syscall %s %d");
break;
case VIR_ERR_OS_TYPE:
if (info == NULL)
errmsg = _("unknown OS type");
else
errmsg = _("unknown OS type %s");
break;
case VIR_ERR_NO_KERNEL:
errmsg = _("missing kernel information");
break;
case VIR_ERR_NO_ROOT:
if (info == NULL)
errmsg = _("missing root device information");
else
errmsg = _("missing root device information in %s");
break;
case VIR_ERR_NO_SOURCE:
if (info == NULL)
errmsg = _("missing source information for device");
else
errmsg = _("missing source information for device %s");
break;
case VIR_ERR_NO_TARGET:
if (info == NULL)
errmsg = _("missing target information for device");
else
errmsg = _("missing target information for device %s");
break;
case VIR_ERR_NO_NAME:
if (info == NULL)
errmsg = _("missing domain name information");
else
errmsg = _("missing domain name information in %s");
break;
case VIR_ERR_NO_OS:
if (info == NULL)
errmsg = _("missing operating system information");
else
errmsg = _("missing operating system information for %s");
break;
case VIR_ERR_NO_DEVICE:
if (info == NULL)
errmsg = _("missing devices information");
else
errmsg = _("missing devices information for %s");
break;
case VIR_ERR_DRIVER_FULL:
if (info == NULL)
errmsg = _("too many drivers registered");
else
errmsg = _("too many drivers registered in %s");
break;
case VIR_ERR_CALL_FAILED: /* DEPRECATED, use VIR_ERR_NO_SUPPORT */
if (info == NULL)
errmsg = _("library call failed, possibly not supported");
else
errmsg = _("library call %s failed, possibly not supported");
break;
case VIR_ERR_XML_ERROR:
if (info == NULL)
errmsg = _("XML description not well formed or invalid");
else
errmsg = _("XML description for %s is not well formed or invalid");
break;
case VIR_ERR_DOM_EXIST:
if (info == NULL)
errmsg = _("this domain exists already");
else
errmsg = _("domain %s exists already");
break;
case VIR_ERR_OPERATION_DENIED:
if (info == NULL)
errmsg = _("operation forbidden for read only access");
else
errmsg = _("operation %s forbidden for read only access");
break;
case VIR_ERR_OPEN_FAILED:
if (info == NULL)
errmsg = _("failed to open configuration file for reading");
else
errmsg = _("failed to open %s for reading");
break;
case VIR_ERR_READ_FAILED:
if (info == NULL)
errmsg = _("failed to read configuration file");
else
errmsg = _("failed to read configuration file %s");
break;
case VIR_ERR_PARSE_FAILED:
if (info == NULL)
errmsg = _("failed to parse configuration file");
else
errmsg = _("failed to parse configuration file %s");
break;
case VIR_ERR_CONF_SYNTAX:
if (info == NULL)
errmsg = _("configuration file syntax error");
else
errmsg = _("configuration file syntax error: %s");
break;
case VIR_ERR_WRITE_FAILED:
if (info == NULL)
errmsg = _("failed to write configuration file");
else
errmsg = _("failed to write configuration file: %s");
break;
case VIR_ERR_XML_DETAIL:
if (info == NULL)
errmsg = _("parser error");
else
errmsg = "%s";
break;
case VIR_ERR_INVALID_NETWORK:
if (info == NULL)
errmsg = _("invalid network pointer in");
else
errmsg = _("invalid network pointer in %s");
break;
case VIR_ERR_NETWORK_EXIST:
if (info == NULL)
errmsg = _("this network exists already");
else
errmsg = _("network %s exists already");
break;
case VIR_ERR_SYSTEM_ERROR:
if (info == NULL)
errmsg = _("system call error");
else
errmsg = "%s";
break;
case VIR_ERR_RPC:
if (info == NULL)
errmsg = _("RPC error");
else
errmsg = "%s";
break;
case VIR_ERR_GNUTLS_ERROR:
if (info == NULL)
errmsg = _("GNUTLS call error");
else
errmsg = "%s";
break;
case VIR_WAR_NO_NETWORK:
if (info == NULL)
errmsg = _("Failed to find the network");
else
errmsg = _("Failed to find the network: %s");
break;
case VIR_ERR_NO_DOMAIN:
if (info == NULL)
errmsg = _("Domain not found");
else
errmsg = _("Domain not found: %s");
break;
case VIR_ERR_NO_NETWORK:
if (info == NULL)
errmsg = _("Network not found");
else
errmsg = _("Network not found: %s");
break;
case VIR_ERR_INVALID_MAC:
if (info == NULL)
errmsg = _("invalid MAC address");
else
errmsg = _("invalid MAC address: %s");
break;
case VIR_ERR_AUTH_FAILED:
if (info == NULL)
errmsg = _("authentication failed");
else
errmsg = _("authentication failed: %s");
break;
case VIR_ERR_NO_STORAGE_POOL:
if (info == NULL)
errmsg = _("Storage pool not found");
else
errmsg = _("Storage pool not found: %s");
break;
case VIR_ERR_NO_STORAGE_VOL:
if (info == NULL)
errmsg = _("Storage volume not found");
else
errmsg = _("Storage volume not found: %s");
break;
case VIR_ERR_INVALID_STORAGE_POOL:
if (info == NULL)
errmsg = _("invalid storage pool pointer in");
else
errmsg = _("invalid storage pool pointer in %s");
break;
case VIR_ERR_INVALID_STORAGE_VOL:
if (info == NULL)
errmsg = _("invalid storage volume pointer in");
else
errmsg = _("invalid storage volume pointer in %s");
break;
case VIR_WAR_NO_STORAGE:
if (info == NULL)
errmsg = _("Failed to find a storage driver");
else
errmsg = _("Failed to find a storage driver: %s");
break;
}
return (errmsg);
}
|
