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c589b249 RS |
1 | /* |
2 | * QEMU Block driver for iSCSI images | |
3 | * | |
4 | * Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "config-host.h" | |
26 | ||
27 | #include <poll.h> | |
28 | #include "qemu-common.h" | |
29 | #include "qemu-error.h" | |
30 | #include "block_int.h" | |
31 | #include "trace.h" | |
32 | ||
33 | #include <iscsi/iscsi.h> | |
34 | #include <iscsi/scsi-lowlevel.h> | |
35 | ||
36 | ||
37 | typedef struct IscsiLun { | |
38 | struct iscsi_context *iscsi; | |
39 | int lun; | |
40 | int block_size; | |
41 | unsigned long num_blocks; | |
42 | } IscsiLun; | |
43 | ||
44 | typedef struct IscsiAIOCB { | |
45 | BlockDriverAIOCB common; | |
46 | QEMUIOVector *qiov; | |
47 | QEMUBH *bh; | |
48 | IscsiLun *iscsilun; | |
49 | struct scsi_task *task; | |
50 | uint8_t *buf; | |
51 | int status; | |
52 | int canceled; | |
53 | size_t read_size; | |
54 | size_t read_offset; | |
55 | } IscsiAIOCB; | |
56 | ||
57 | struct IscsiTask { | |
58 | IscsiLun *iscsilun; | |
59 | BlockDriverState *bs; | |
60 | int status; | |
61 | int complete; | |
62 | }; | |
63 | ||
64 | static void | |
65 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
66 | void *private_data) | |
67 | { | |
68 | } | |
69 | ||
70 | static void | |
71 | iscsi_aio_cancel(BlockDriverAIOCB *blockacb) | |
72 | { | |
73 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
74 | IscsiLun *iscsilun = acb->iscsilun; | |
75 | ||
76 | acb->common.cb(acb->common.opaque, -ECANCELED); | |
77 | acb->canceled = 1; | |
78 | ||
79 | /* send a task mgmt call to the target to cancel the task on the target */ | |
80 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, | |
81 | iscsi_abort_task_cb, NULL); | |
82 | ||
83 | /* then also cancel the task locally in libiscsi */ | |
84 | iscsi_scsi_task_cancel(iscsilun->iscsi, acb->task); | |
85 | } | |
86 | ||
87 | static AIOPool iscsi_aio_pool = { | |
88 | .aiocb_size = sizeof(IscsiAIOCB), | |
89 | .cancel = iscsi_aio_cancel, | |
90 | }; | |
91 | ||
92 | ||
93 | static void iscsi_process_read(void *arg); | |
94 | static void iscsi_process_write(void *arg); | |
95 | ||
96 | static int iscsi_process_flush(void *arg) | |
97 | { | |
98 | IscsiLun *iscsilun = arg; | |
99 | ||
100 | return iscsi_queue_length(iscsilun->iscsi) > 0; | |
101 | } | |
102 | ||
103 | static void | |
104 | iscsi_set_events(IscsiLun *iscsilun) | |
105 | { | |
106 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
107 | ||
108 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), iscsi_process_read, | |
109 | (iscsi_which_events(iscsi) & POLLOUT) | |
110 | ? iscsi_process_write : NULL, | |
111 | iscsi_process_flush, NULL, iscsilun); | |
112 | } | |
113 | ||
114 | static void | |
115 | iscsi_process_read(void *arg) | |
116 | { | |
117 | IscsiLun *iscsilun = arg; | |
118 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
119 | ||
120 | iscsi_service(iscsi, POLLIN); | |
121 | iscsi_set_events(iscsilun); | |
122 | } | |
123 | ||
124 | static void | |
125 | iscsi_process_write(void *arg) | |
126 | { | |
127 | IscsiLun *iscsilun = arg; | |
128 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
129 | ||
130 | iscsi_service(iscsi, POLLOUT); | |
131 | iscsi_set_events(iscsilun); | |
132 | } | |
133 | ||
134 | ||
135 | static int | |
136 | iscsi_schedule_bh(QEMUBHFunc *cb, IscsiAIOCB *acb) | |
137 | { | |
138 | acb->bh = qemu_bh_new(cb, acb); | |
139 | if (!acb->bh) { | |
140 | error_report("oom: could not create iscsi bh"); | |
141 | return -EIO; | |
142 | } | |
143 | ||
144 | qemu_bh_schedule(acb->bh); | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static void | |
149 | iscsi_readv_writev_bh_cb(void *p) | |
150 | { | |
151 | IscsiAIOCB *acb = p; | |
152 | ||
153 | qemu_bh_delete(acb->bh); | |
154 | ||
155 | if (acb->canceled == 0) { | |
156 | acb->common.cb(acb->common.opaque, acb->status); | |
157 | } | |
158 | ||
159 | qemu_aio_release(acb); | |
160 | } | |
161 | ||
162 | ||
163 | static void | |
164 | iscsi_aio_write10_cb(struct iscsi_context *iscsi, int status, | |
165 | void *command_data, void *opaque) | |
166 | { | |
167 | IscsiAIOCB *acb = opaque; | |
168 | ||
169 | trace_iscsi_aio_write10_cb(iscsi, status, acb, acb->canceled); | |
170 | ||
171 | g_free(acb->buf); | |
172 | ||
173 | if (acb->canceled != 0) { | |
174 | qemu_aio_release(acb); | |
175 | scsi_free_scsi_task(acb->task); | |
176 | acb->task = NULL; | |
177 | return; | |
178 | } | |
179 | ||
180 | acb->status = 0; | |
181 | if (status < 0) { | |
182 | error_report("Failed to write10 data to iSCSI lun. %s", | |
183 | iscsi_get_error(iscsi)); | |
184 | acb->status = -EIO; | |
185 | } | |
186 | ||
187 | iscsi_schedule_bh(iscsi_readv_writev_bh_cb, acb); | |
188 | scsi_free_scsi_task(acb->task); | |
189 | acb->task = NULL; | |
190 | } | |
191 | ||
192 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) | |
193 | { | |
194 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
195 | } | |
196 | ||
197 | static BlockDriverAIOCB * | |
198 | iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
199 | QEMUIOVector *qiov, int nb_sectors, | |
200 | BlockDriverCompletionFunc *cb, | |
201 | void *opaque) | |
202 | { | |
203 | IscsiLun *iscsilun = bs->opaque; | |
204 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
205 | IscsiAIOCB *acb; | |
206 | size_t size; | |
207 | int fua = 0; | |
208 | ||
209 | /* set FUA on writes when cache mode is write through */ | |
210 | if (!(bs->open_flags & BDRV_O_CACHE_WB)) { | |
211 | fua = 1; | |
212 | } | |
213 | ||
214 | acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque); | |
215 | trace_iscsi_aio_writev(iscsi, sector_num, nb_sectors, opaque, acb); | |
216 | ||
217 | acb->iscsilun = iscsilun; | |
218 | acb->qiov = qiov; | |
219 | ||
220 | acb->canceled = 0; | |
221 | ||
222 | /* XXX we should pass the iovec to write10 to avoid the extra copy */ | |
223 | /* this will allow us to get rid of 'buf' completely */ | |
224 | size = nb_sectors * BDRV_SECTOR_SIZE; | |
225 | acb->buf = g_malloc(size); | |
226 | qemu_iovec_to_buffer(acb->qiov, acb->buf); | |
227 | acb->task = iscsi_write10_task(iscsi, iscsilun->lun, acb->buf, size, | |
228 | sector_qemu2lun(sector_num, iscsilun), | |
229 | fua, 0, iscsilun->block_size, | |
230 | iscsi_aio_write10_cb, acb); | |
231 | if (acb->task == NULL) { | |
232 | error_report("iSCSI: Failed to send write10 command. %s", | |
233 | iscsi_get_error(iscsi)); | |
234 | g_free(acb->buf); | |
235 | qemu_aio_release(acb); | |
236 | return NULL; | |
237 | } | |
238 | ||
239 | iscsi_set_events(iscsilun); | |
240 | ||
241 | return &acb->common; | |
242 | } | |
243 | ||
244 | static void | |
245 | iscsi_aio_read10_cb(struct iscsi_context *iscsi, int status, | |
246 | void *command_data, void *opaque) | |
247 | { | |
248 | IscsiAIOCB *acb = opaque; | |
249 | ||
250 | trace_iscsi_aio_read10_cb(iscsi, status, acb, acb->canceled); | |
251 | ||
252 | if (acb->canceled != 0) { | |
253 | qemu_aio_release(acb); | |
254 | scsi_free_scsi_task(acb->task); | |
255 | acb->task = NULL; | |
256 | return; | |
257 | } | |
258 | ||
259 | acb->status = 0; | |
260 | if (status != 0) { | |
261 | error_report("Failed to read10 data from iSCSI lun. %s", | |
262 | iscsi_get_error(iscsi)); | |
263 | acb->status = -EIO; | |
264 | } | |
265 | ||
266 | iscsi_schedule_bh(iscsi_readv_writev_bh_cb, acb); | |
267 | scsi_free_scsi_task(acb->task); | |
268 | acb->task = NULL; | |
269 | } | |
270 | ||
271 | static BlockDriverAIOCB * | |
272 | iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
273 | QEMUIOVector *qiov, int nb_sectors, | |
274 | BlockDriverCompletionFunc *cb, | |
275 | void *opaque) | |
276 | { | |
277 | IscsiLun *iscsilun = bs->opaque; | |
278 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
279 | IscsiAIOCB *acb; | |
280 | size_t qemu_read_size, lun_read_size; | |
281 | int i; | |
282 | ||
283 | qemu_read_size = BDRV_SECTOR_SIZE * (size_t)nb_sectors; | |
284 | ||
285 | acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque); | |
286 | trace_iscsi_aio_readv(iscsi, sector_num, nb_sectors, opaque, acb); | |
287 | ||
288 | acb->iscsilun = iscsilun; | |
289 | acb->qiov = qiov; | |
290 | ||
291 | acb->canceled = 0; | |
292 | acb->read_size = qemu_read_size; | |
293 | acb->buf = NULL; | |
294 | ||
295 | /* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU | |
296 | * may be misaligned to the LUN, so we may need to read some extra | |
297 | * data. | |
298 | */ | |
299 | acb->read_offset = 0; | |
300 | if (iscsilun->block_size > BDRV_SECTOR_SIZE) { | |
301 | uint64_t bdrv_offset = BDRV_SECTOR_SIZE * sector_num; | |
302 | ||
303 | acb->read_offset = bdrv_offset % iscsilun->block_size; | |
304 | } | |
305 | ||
306 | lun_read_size = (qemu_read_size + iscsilun->block_size | |
307 | + acb->read_offset - 1) | |
308 | / iscsilun->block_size * iscsilun->block_size; | |
309 | acb->task = iscsi_read10_task(iscsi, iscsilun->lun, | |
310 | sector_qemu2lun(sector_num, iscsilun), | |
311 | lun_read_size, iscsilun->block_size, | |
312 | iscsi_aio_read10_cb, acb); | |
313 | if (acb->task == NULL) { | |
314 | error_report("iSCSI: Failed to send read10 command. %s", | |
315 | iscsi_get_error(iscsi)); | |
316 | qemu_aio_release(acb); | |
317 | return NULL; | |
318 | } | |
319 | ||
320 | for (i = 0; i < acb->qiov->niov; i++) { | |
321 | scsi_task_add_data_in_buffer(acb->task, | |
322 | acb->qiov->iov[i].iov_len, | |
323 | acb->qiov->iov[i].iov_base); | |
324 | } | |
325 | ||
326 | iscsi_set_events(iscsilun); | |
327 | ||
328 | return &acb->common; | |
329 | } | |
330 | ||
331 | ||
332 | static void | |
333 | iscsi_synccache10_cb(struct iscsi_context *iscsi, int status, | |
334 | void *command_data, void *opaque) | |
335 | { | |
336 | IscsiAIOCB *acb = opaque; | |
337 | ||
338 | if (acb->canceled != 0) { | |
339 | qemu_aio_release(acb); | |
340 | scsi_free_scsi_task(acb->task); | |
341 | acb->task = NULL; | |
342 | return; | |
343 | } | |
344 | ||
345 | acb->status = 0; | |
346 | if (status < 0) { | |
347 | error_report("Failed to sync10 data on iSCSI lun. %s", | |
348 | iscsi_get_error(iscsi)); | |
349 | acb->status = -EIO; | |
350 | } | |
351 | ||
352 | iscsi_schedule_bh(iscsi_readv_writev_bh_cb, acb); | |
353 | scsi_free_scsi_task(acb->task); | |
354 | acb->task = NULL; | |
355 | } | |
356 | ||
357 | static BlockDriverAIOCB * | |
358 | iscsi_aio_flush(BlockDriverState *bs, | |
359 | BlockDriverCompletionFunc *cb, void *opaque) | |
360 | { | |
361 | IscsiLun *iscsilun = bs->opaque; | |
362 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
363 | IscsiAIOCB *acb; | |
364 | ||
365 | acb = qemu_aio_get(&iscsi_aio_pool, bs, cb, opaque); | |
366 | ||
367 | acb->iscsilun = iscsilun; | |
368 | acb->canceled = 0; | |
369 | ||
370 | acb->task = iscsi_synchronizecache10_task(iscsi, iscsilun->lun, | |
371 | 0, 0, 0, 0, | |
372 | iscsi_synccache10_cb, | |
373 | acb); | |
374 | if (acb->task == NULL) { | |
375 | error_report("iSCSI: Failed to send synchronizecache10 command. %s", | |
376 | iscsi_get_error(iscsi)); | |
377 | qemu_aio_release(acb); | |
378 | return NULL; | |
379 | } | |
380 | ||
381 | iscsi_set_events(iscsilun); | |
382 | ||
383 | return &acb->common; | |
384 | } | |
385 | ||
386 | static int64_t | |
387 | iscsi_getlength(BlockDriverState *bs) | |
388 | { | |
389 | IscsiLun *iscsilun = bs->opaque; | |
390 | int64_t len; | |
391 | ||
392 | len = iscsilun->num_blocks; | |
393 | len *= iscsilun->block_size; | |
394 | ||
395 | return len; | |
396 | } | |
397 | ||
398 | static void | |
399 | iscsi_readcapacity10_cb(struct iscsi_context *iscsi, int status, | |
400 | void *command_data, void *opaque) | |
401 | { | |
402 | struct IscsiTask *itask = opaque; | |
403 | struct scsi_readcapacity10 *rc10; | |
404 | struct scsi_task *task = command_data; | |
405 | ||
406 | if (status != 0) { | |
407 | error_report("iSCSI: Failed to read capacity of iSCSI lun. %s", | |
408 | iscsi_get_error(iscsi)); | |
409 | itask->status = 1; | |
410 | itask->complete = 1; | |
411 | scsi_free_scsi_task(task); | |
412 | return; | |
413 | } | |
414 | ||
415 | rc10 = scsi_datain_unmarshall(task); | |
416 | if (rc10 == NULL) { | |
417 | error_report("iSCSI: Failed to unmarshall readcapacity10 data."); | |
418 | itask->status = 1; | |
419 | itask->complete = 1; | |
420 | scsi_free_scsi_task(task); | |
421 | return; | |
422 | } | |
423 | ||
424 | itask->iscsilun->block_size = rc10->block_size; | |
425 | itask->iscsilun->num_blocks = rc10->lba; | |
426 | itask->bs->total_sectors = (uint64_t)rc10->lba * | |
427 | rc10->block_size / BDRV_SECTOR_SIZE ; | |
428 | ||
429 | itask->status = 0; | |
430 | itask->complete = 1; | |
431 | scsi_free_scsi_task(task); | |
432 | } | |
433 | ||
434 | ||
435 | static void | |
436 | iscsi_connect_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
437 | void *opaque) | |
438 | { | |
439 | struct IscsiTask *itask = opaque; | |
440 | struct scsi_task *task; | |
441 | ||
442 | if (status != 0) { | |
443 | itask->status = 1; | |
444 | itask->complete = 1; | |
445 | return; | |
446 | } | |
447 | ||
448 | task = iscsi_readcapacity10_task(iscsi, itask->iscsilun->lun, 0, 0, | |
449 | iscsi_readcapacity10_cb, opaque); | |
450 | if (task == NULL) { | |
451 | error_report("iSCSI: failed to send readcapacity command."); | |
452 | itask->status = 1; | |
453 | itask->complete = 1; | |
454 | return; | |
455 | } | |
456 | } | |
457 | ||
f9dadc98 RS |
458 | static int parse_chap(struct iscsi_context *iscsi, const char *target) |
459 | { | |
460 | QemuOptsList *list; | |
461 | QemuOpts *opts; | |
462 | const char *user = NULL; | |
463 | const char *password = NULL; | |
464 | ||
465 | list = qemu_find_opts("iscsi"); | |
466 | if (!list) { | |
467 | return 0; | |
468 | } | |
469 | ||
470 | opts = qemu_opts_find(list, target); | |
471 | if (opts == NULL) { | |
472 | opts = QTAILQ_FIRST(&list->head); | |
473 | if (!opts) { | |
474 | return 0; | |
475 | } | |
476 | } | |
477 | ||
478 | user = qemu_opt_get(opts, "user"); | |
479 | if (!user) { | |
480 | return 0; | |
481 | } | |
482 | ||
483 | password = qemu_opt_get(opts, "password"); | |
484 | if (!password) { | |
485 | error_report("CHAP username specified but no password was given"); | |
486 | return -1; | |
487 | } | |
488 | ||
489 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
490 | error_report("Failed to set initiator username and password"); | |
491 | return -1; | |
492 | } | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
497 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target) | |
498 | { | |
499 | QemuOptsList *list; | |
500 | QemuOpts *opts; | |
501 | const char *digest = NULL; | |
502 | ||
503 | list = qemu_find_opts("iscsi"); | |
504 | if (!list) { | |
505 | return; | |
506 | } | |
507 | ||
508 | opts = qemu_opts_find(list, target); | |
509 | if (opts == NULL) { | |
510 | opts = QTAILQ_FIRST(&list->head); | |
511 | if (!opts) { | |
512 | return; | |
513 | } | |
514 | } | |
515 | ||
516 | digest = qemu_opt_get(opts, "header-digest"); | |
517 | if (!digest) { | |
518 | return; | |
519 | } | |
520 | ||
521 | if (!strcmp(digest, "CRC32C")) { | |
522 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
523 | } else if (!strcmp(digest, "NONE")) { | |
524 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
525 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
526 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
527 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
528 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
529 | } else { | |
530 | error_report("Invalid header-digest setting : %s", digest); | |
531 | } | |
532 | } | |
533 | ||
534 | static char *parse_initiator_name(const char *target) | |
535 | { | |
536 | QemuOptsList *list; | |
537 | QemuOpts *opts; | |
538 | const char *name = NULL; | |
539 | ||
540 | list = qemu_find_opts("iscsi"); | |
541 | if (!list) { | |
542 | return g_strdup("iqn.2008-11.org.linux-kvm"); | |
543 | } | |
544 | ||
545 | opts = qemu_opts_find(list, target); | |
546 | if (opts == NULL) { | |
547 | opts = QTAILQ_FIRST(&list->head); | |
548 | if (!opts) { | |
549 | return g_strdup("iqn.2008-11.org.linux-kvm"); | |
550 | } | |
551 | } | |
552 | ||
553 | name = qemu_opt_get(opts, "initiator-name"); | |
554 | if (!name) { | |
555 | return g_strdup("iqn.2008-11.org.linux-kvm"); | |
556 | } | |
557 | ||
558 | return g_strdup(name); | |
559 | } | |
560 | ||
c589b249 RS |
561 | /* |
562 | * We support iscsi url's on the form | |
563 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
564 | */ | |
565 | static int iscsi_open(BlockDriverState *bs, const char *filename, int flags) | |
566 | { | |
567 | IscsiLun *iscsilun = bs->opaque; | |
568 | struct iscsi_context *iscsi = NULL; | |
569 | struct iscsi_url *iscsi_url = NULL; | |
570 | struct IscsiTask task; | |
f9dadc98 | 571 | char *initiator_name = NULL; |
c589b249 RS |
572 | int ret; |
573 | ||
574 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
575 | error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. " | |
576 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
577 | "of 512", BDRV_SECTOR_SIZE); | |
578 | return -EINVAL; | |
579 | } | |
580 | ||
c589b249 RS |
581 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
582 | if (iscsi_url == NULL) { | |
583 | error_report("Failed to parse URL : %s %s", filename, | |
584 | iscsi_get_error(iscsi)); | |
585 | ret = -EINVAL; | |
586 | goto failed; | |
587 | } | |
588 | ||
f9dadc98 RS |
589 | memset(iscsilun, 0, sizeof(IscsiLun)); |
590 | ||
591 | initiator_name = parse_initiator_name(iscsi_url->target); | |
592 | ||
593 | iscsi = iscsi_create_context(initiator_name); | |
594 | if (iscsi == NULL) { | |
595 | error_report("iSCSI: Failed to create iSCSI context."); | |
596 | ret = -ENOMEM; | |
597 | goto failed; | |
598 | } | |
599 | ||
c589b249 RS |
600 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
601 | error_report("iSCSI: Failed to set target name."); | |
602 | ret = -EINVAL; | |
603 | goto failed; | |
604 | } | |
605 | ||
606 | if (iscsi_url->user != NULL) { | |
607 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
608 | iscsi_url->passwd); | |
609 | if (ret != 0) { | |
610 | error_report("Failed to set initiator username and password"); | |
611 | ret = -EINVAL; | |
612 | goto failed; | |
613 | } | |
614 | } | |
f9dadc98 RS |
615 | |
616 | /* check if we got CHAP username/password via the options */ | |
617 | if (parse_chap(iscsi, iscsi_url->target) != 0) { | |
618 | error_report("iSCSI: Failed to set CHAP user/password"); | |
619 | ret = -EINVAL; | |
620 | goto failed; | |
621 | } | |
622 | ||
c589b249 RS |
623 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
624 | error_report("iSCSI: Failed to set session type to normal."); | |
625 | ret = -EINVAL; | |
626 | goto failed; | |
627 | } | |
628 | ||
629 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
630 | ||
f9dadc98 RS |
631 | /* check if we got HEADER_DIGEST via the options */ |
632 | parse_header_digest(iscsi, iscsi_url->target); | |
633 | ||
c589b249 RS |
634 | task.iscsilun = iscsilun; |
635 | task.status = 0; | |
636 | task.complete = 0; | |
637 | task.bs = bs; | |
638 | ||
639 | iscsilun->iscsi = iscsi; | |
640 | iscsilun->lun = iscsi_url->lun; | |
641 | ||
642 | if (iscsi_full_connect_async(iscsi, iscsi_url->portal, iscsi_url->lun, | |
643 | iscsi_connect_cb, &task) | |
644 | != 0) { | |
645 | error_report("iSCSI: Failed to start async connect."); | |
646 | ret = -EINVAL; | |
647 | goto failed; | |
648 | } | |
649 | ||
650 | while (!task.complete) { | |
651 | iscsi_set_events(iscsilun); | |
652 | qemu_aio_wait(); | |
653 | } | |
654 | if (task.status != 0) { | |
655 | error_report("iSCSI: Failed to connect to LUN : %s", | |
656 | iscsi_get_error(iscsi)); | |
657 | ret = -EINVAL; | |
658 | goto failed; | |
659 | } | |
660 | ||
661 | if (iscsi_url != NULL) { | |
662 | iscsi_destroy_url(iscsi_url); | |
663 | } | |
664 | return 0; | |
665 | ||
666 | failed: | |
f9dadc98 RS |
667 | if (initiator_name != NULL) { |
668 | g_free(initiator_name); | |
669 | } | |
c589b249 RS |
670 | if (iscsi_url != NULL) { |
671 | iscsi_destroy_url(iscsi_url); | |
672 | } | |
673 | if (iscsi != NULL) { | |
674 | iscsi_destroy_context(iscsi); | |
675 | } | |
676 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
677 | return ret; | |
678 | } | |
679 | ||
680 | static void iscsi_close(BlockDriverState *bs) | |
681 | { | |
682 | IscsiLun *iscsilun = bs->opaque; | |
683 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
684 | ||
685 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL, NULL, NULL); | |
686 | iscsi_destroy_context(iscsi); | |
687 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
688 | } | |
689 | ||
690 | static BlockDriver bdrv_iscsi = { | |
691 | .format_name = "iscsi", | |
692 | .protocol_name = "iscsi", | |
693 | ||
694 | .instance_size = sizeof(IscsiLun), | |
695 | .bdrv_file_open = iscsi_open, | |
696 | .bdrv_close = iscsi_close, | |
697 | ||
698 | .bdrv_getlength = iscsi_getlength, | |
699 | ||
700 | .bdrv_aio_readv = iscsi_aio_readv, | |
701 | .bdrv_aio_writev = iscsi_aio_writev, | |
702 | .bdrv_aio_flush = iscsi_aio_flush, | |
703 | }; | |
704 | ||
705 | static void iscsi_block_init(void) | |
706 | { | |
707 | bdrv_register(&bdrv_iscsi); | |
708 | } | |
709 | ||
710 | block_init(iscsi_block_init); |