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Commit | Line | Data |
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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> | |
2af8a1a7 | 5 | * Copyright (c) 2012-2013 Peter Lieven <pl@kamp.de> |
c589b249 RS |
6 | * |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include "config-host.h" | |
27 | ||
28 | #include <poll.h> | |
f4dfa67f | 29 | #include <arpa/inet.h> |
c589b249 | 30 | #include "qemu-common.h" |
1de7afc9 PB |
31 | #include "qemu/config-file.h" |
32 | #include "qemu/error-report.h" | |
737e150e | 33 | #include "block/block_int.h" |
c589b249 | 34 | #include "trace.h" |
0d09e41a | 35 | #include "block/scsi.h" |
0a53f010 | 36 | #include "qemu/iov.h" |
5accc840 PB |
37 | #include "sysemu/sysemu.h" |
38 | #include "qmp-commands.h" | |
c589b249 RS |
39 | |
40 | #include <iscsi/iscsi.h> | |
41 | #include <iscsi/scsi-lowlevel.h> | |
42 | ||
98392453 RS |
43 | #ifdef __linux__ |
44 | #include <scsi/sg.h> | |
0d09e41a | 45 | #include <block/scsi.h> |
98392453 | 46 | #endif |
c589b249 RS |
47 | |
48 | typedef struct IscsiLun { | |
49 | struct iscsi_context *iscsi; | |
50 | int lun; | |
dbfff6d7 | 51 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 52 | int block_size; |
c7b4a952 | 53 | uint64_t num_blocks; |
c9b9f682 | 54 | int events; |
5b5d34ec | 55 | QEMUTimer *nop_timer; |
f18a7cbb PL |
56 | uint8_t lbpme; |
57 | uint8_t lbprz; | |
fa6252b0 | 58 | uint8_t has_write_same; |
f18a7cbb PL |
59 | struct scsi_inquiry_logical_block_provisioning lbp; |
60 | struct scsi_inquiry_block_limits bl; | |
d4cd9615 | 61 | unsigned char *zeroblock; |
c589b249 RS |
62 | } IscsiLun; |
63 | ||
54a5c1d5 PL |
64 | typedef struct IscsiTask { |
65 | int status; | |
66 | int complete; | |
67 | int retries; | |
68 | int do_retry; | |
69 | struct scsi_task *task; | |
70 | Coroutine *co; | |
71 | } IscsiTask; | |
72 | ||
c589b249 RS |
73 | typedef struct IscsiAIOCB { |
74 | BlockDriverAIOCB common; | |
75 | QEMUIOVector *qiov; | |
76 | QEMUBH *bh; | |
77 | IscsiLun *iscsilun; | |
78 | struct scsi_task *task; | |
79 | uint8_t *buf; | |
80 | int status; | |
81 | int canceled; | |
1dde716e | 82 | int retries; |
1dde716e PL |
83 | int64_t sector_num; |
84 | int nb_sectors; | |
98392453 RS |
85 | #ifdef __linux__ |
86 | sg_io_hdr_t *ioh; | |
87 | #endif | |
c589b249 RS |
88 | } IscsiAIOCB; |
89 | ||
5b5d34ec PL |
90 | #define NOP_INTERVAL 5000 |
91 | #define MAX_NOP_FAILURES 3 | |
1dde716e | 92 | #define ISCSI_CMD_RETRIES 5 |
5b5d34ec | 93 | |
27cbd828 | 94 | static void |
cfb3f506 | 95 | iscsi_bh_cb(void *p) |
27cbd828 PB |
96 | { |
97 | IscsiAIOCB *acb = p; | |
98 | ||
99 | qemu_bh_delete(acb->bh); | |
100 | ||
4790b03d PB |
101 | g_free(acb->buf); |
102 | acb->buf = NULL; | |
103 | ||
27cbd828 PB |
104 | if (acb->canceled == 0) { |
105 | acb->common.cb(acb->common.opaque, acb->status); | |
106 | } | |
107 | ||
1bd075f2 PB |
108 | if (acb->task != NULL) { |
109 | scsi_free_scsi_task(acb->task); | |
110 | acb->task = NULL; | |
111 | } | |
112 | ||
27cbd828 PB |
113 | qemu_aio_release(acb); |
114 | } | |
115 | ||
cfb3f506 PB |
116 | static void |
117 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 118 | { |
1bd075f2 PB |
119 | if (acb->bh) { |
120 | return; | |
121 | } | |
cfb3f506 | 122 | acb->bh = qemu_bh_new(iscsi_bh_cb, acb); |
27cbd828 | 123 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
124 | } |
125 | ||
54a5c1d5 PL |
126 | static void |
127 | iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, | |
128 | void *command_data, void *opaque) | |
129 | { | |
130 | struct IscsiTask *iTask = opaque; | |
131 | struct scsi_task *task = command_data; | |
132 | ||
133 | iTask->complete = 1; | |
134 | iTask->status = status; | |
135 | iTask->do_retry = 0; | |
136 | iTask->task = task; | |
137 | ||
138 | if (iTask->retries-- > 0 && status == SCSI_STATUS_CHECK_CONDITION | |
139 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
140 | iTask->do_retry = 1; | |
141 | goto out; | |
142 | } | |
143 | ||
144 | if (status != SCSI_STATUS_GOOD) { | |
145 | error_report("iSCSI: Failure. %s", iscsi_get_error(iscsi)); | |
146 | } | |
147 | ||
148 | out: | |
149 | if (iTask->co) { | |
150 | qemu_coroutine_enter(iTask->co, NULL); | |
151 | } | |
152 | } | |
153 | ||
154 | static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) | |
155 | { | |
156 | *iTask = (struct IscsiTask) { | |
157 | .co = qemu_coroutine_self(), | |
158 | .retries = ISCSI_CMD_RETRIES, | |
159 | }; | |
160 | } | |
27cbd828 | 161 | |
c589b249 RS |
162 | static void |
163 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
164 | void *private_data) | |
165 | { | |
1bd075f2 PB |
166 | IscsiAIOCB *acb = private_data; |
167 | ||
168 | acb->status = -ECANCELED; | |
169 | iscsi_schedule_bh(acb); | |
c589b249 RS |
170 | } |
171 | ||
172 | static void | |
173 | iscsi_aio_cancel(BlockDriverAIOCB *blockacb) | |
174 | { | |
175 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
176 | IscsiLun *iscsilun = acb->iscsilun; | |
177 | ||
1bd075f2 PB |
178 | if (acb->status != -EINPROGRESS) { |
179 | return; | |
180 | } | |
181 | ||
b2090919 | 182 | acb->canceled = 1; |
c589b249 | 183 | |
b2090919 | 184 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 185 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 186 | iscsi_abort_task_cb, acb); |
b2090919 | 187 | |
1bd075f2 PB |
188 | while (acb->status == -EINPROGRESS) { |
189 | qemu_aio_wait(); | |
190 | } | |
c589b249 RS |
191 | } |
192 | ||
d7331bed | 193 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 RS |
194 | .aiocb_size = sizeof(IscsiAIOCB), |
195 | .cancel = iscsi_aio_cancel, | |
196 | }; | |
197 | ||
198 | ||
199 | static void iscsi_process_read(void *arg); | |
200 | static void iscsi_process_write(void *arg); | |
201 | ||
c589b249 RS |
202 | static void |
203 | iscsi_set_events(IscsiLun *iscsilun) | |
204 | { | |
205 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
c9b9f682 RS |
206 | int ev; |
207 | ||
208 | /* We always register a read handler. */ | |
209 | ev = POLLIN; | |
210 | ev |= iscsi_which_events(iscsi); | |
211 | if (ev != iscsilun->events) { | |
212 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), | |
213 | iscsi_process_read, | |
214 | (ev & POLLOUT) ? iscsi_process_write : NULL, | |
c9b9f682 RS |
215 | iscsilun); |
216 | ||
217 | } | |
218 | ||
c9b9f682 | 219 | iscsilun->events = ev; |
c589b249 RS |
220 | } |
221 | ||
222 | static void | |
223 | iscsi_process_read(void *arg) | |
224 | { | |
225 | IscsiLun *iscsilun = arg; | |
226 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
227 | ||
228 | iscsi_service(iscsi, POLLIN); | |
229 | iscsi_set_events(iscsilun); | |
230 | } | |
231 | ||
232 | static void | |
233 | iscsi_process_write(void *arg) | |
234 | { | |
235 | IscsiLun *iscsilun = arg; | |
236 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
237 | ||
238 | iscsi_service(iscsi, POLLOUT); | |
239 | iscsi_set_events(iscsilun); | |
240 | } | |
241 | ||
0777b5dd PL |
242 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
243 | { | |
244 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
245 | } | |
246 | ||
c589b249 RS |
247 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
248 | { | |
249 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
250 | } | |
251 | ||
91bea4e2 PL |
252 | static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
253 | IscsiLun *iscsilun) | |
254 | { | |
255 | if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size || | |
256 | (nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { | |
f5075224 RJ |
257 | error_report("iSCSI misaligned request: " |
258 | "iscsilun->block_size %u, sector_num %" PRIi64 | |
259 | ", nb_sectors %d", | |
91bea4e2 PL |
260 | iscsilun->block_size, sector_num, nb_sectors); |
261 | return 0; | |
262 | } | |
263 | return 1; | |
264 | } | |
265 | ||
063c3378 PL |
266 | static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, |
267 | int64_t sector_num, int nb_sectors, | |
268 | QEMUIOVector *iov) | |
c589b249 | 269 | { |
063c3378 PL |
270 | IscsiLun *iscsilun = bs->opaque; |
271 | struct IscsiTask iTask; | |
f4dfa67f | 272 | uint64_t lba; |
063c3378 PL |
273 | uint32_t num_sectors; |
274 | uint8_t *data = NULL; | |
275 | uint8_t *buf = NULL; | |
c589b249 | 276 | |
063c3378 PL |
277 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
278 | return -EINVAL; | |
279 | } | |
7371d56f | 280 | |
063c3378 PL |
281 | lba = sector_qemu2lun(sector_num, iscsilun); |
282 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
7371d56f | 283 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
4cc841b5 | 284 | /* if the iovec only contains one buffer we can pass it directly */ |
063c3378 PL |
285 | if (iov->niov == 1) { |
286 | data = iov->iov[0].iov_base; | |
4cc841b5 | 287 | } else { |
063c3378 PL |
288 | size_t size = MIN(nb_sectors * BDRV_SECTOR_SIZE, iov->size); |
289 | buf = g_malloc(size); | |
290 | qemu_iovec_to_buf(iov, 0, buf, size); | |
291 | data = buf; | |
4cc841b5 | 292 | } |
7371d56f | 293 | #endif |
063c3378 PL |
294 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
295 | retry: | |
296 | iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
297 | data, num_sectors * iscsilun->block_size, | |
298 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
299 | iscsi_co_generic_cb, &iTask); | |
300 | if (iTask.task == NULL) { | |
301 | g_free(buf); | |
302 | return -EIO; | |
f4dfa67f | 303 | } |
7371d56f | 304 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
063c3378 PL |
305 | scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, |
306 | iov->niov); | |
7371d56f | 307 | #endif |
063c3378 PL |
308 | while (!iTask.complete) { |
309 | iscsi_set_events(iscsilun); | |
310 | qemu_coroutine_yield(); | |
c589b249 RS |
311 | } |
312 | ||
063c3378 PL |
313 | if (iTask.task != NULL) { |
314 | scsi_free_scsi_task(iTask.task); | |
315 | iTask.task = NULL; | |
91bea4e2 PL |
316 | } |
317 | ||
063c3378 PL |
318 | if (iTask.do_retry) { |
319 | goto retry; | |
1dde716e PL |
320 | } |
321 | ||
063c3378 | 322 | g_free(buf); |
c589b249 | 323 | |
063c3378 PL |
324 | if (iTask.status != SCSI_STATUS_GOOD) { |
325 | return -EIO; | |
c589b249 RS |
326 | } |
327 | ||
063c3378 | 328 | return 0; |
c589b249 RS |
329 | } |
330 | ||
063c3378 PL |
331 | static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
332 | int64_t sector_num, int nb_sectors, | |
333 | QEMUIOVector *iov) | |
c589b249 | 334 | { |
063c3378 PL |
335 | IscsiLun *iscsilun = bs->opaque; |
336 | struct IscsiTask iTask; | |
1dde716e PL |
337 | uint64_t lba; |
338 | uint32_t num_sectors; | |
7371d56f | 339 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
c589b249 | 340 | int i; |
7371d56f | 341 | #endif |
c589b249 | 342 | |
063c3378 PL |
343 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
344 | return -EINVAL; | |
f4dfa67f | 345 | } |
f4dfa67f | 346 | |
063c3378 PL |
347 | lba = sector_qemu2lun(sector_num, iscsilun); |
348 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
f4dfa67f | 349 | |
063c3378 PL |
350 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
351 | retry: | |
352 | switch (iscsilun->type) { | |
f4dfa67f | 353 | case TYPE_DISK: |
063c3378 PL |
354 | iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
355 | num_sectors * iscsilun->block_size, | |
356 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
357 | iscsi_co_generic_cb, &iTask); | |
f4dfa67f RS |
358 | break; |
359 | default: | |
063c3378 PL |
360 | iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
361 | num_sectors * iscsilun->block_size, | |
362 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
363 | iscsi_co_generic_cb, &iTask); | |
f4dfa67f RS |
364 | break; |
365 | } | |
063c3378 PL |
366 | if (iTask.task == NULL) { |
367 | return -EIO; | |
c589b249 | 368 | } |
7371d56f | 369 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
063c3378 | 370 | scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); |
7371d56f | 371 | #else |
063c3378 PL |
372 | for (i = 0; i < iov->niov; i++) { |
373 | scsi_task_add_data_in_buffer(iTask.task, | |
374 | iov->iov[i].iov_len, | |
375 | iov->iov[i].iov_base); | |
c589b249 | 376 | } |
7371d56f | 377 | #endif |
91bea4e2 | 378 | |
063c3378 PL |
379 | while (!iTask.complete) { |
380 | iscsi_set_events(iscsilun); | |
381 | qemu_coroutine_yield(); | |
1dde716e | 382 | } |
c589b249 | 383 | |
063c3378 PL |
384 | if (iTask.task != NULL) { |
385 | scsi_free_scsi_task(iTask.task); | |
386 | iTask.task = NULL; | |
c589b249 RS |
387 | } |
388 | ||
063c3378 PL |
389 | if (iTask.do_retry) { |
390 | goto retry; | |
c589b249 RS |
391 | } |
392 | ||
063c3378 PL |
393 | if (iTask.status != SCSI_STATUS_GOOD) { |
394 | return -EIO; | |
1dde716e PL |
395 | } |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
063c3378 | 400 | static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
1dde716e PL |
401 | { |
402 | IscsiLun *iscsilun = bs->opaque; | |
063c3378 | 403 | struct IscsiTask iTask; |
1dde716e | 404 | |
063c3378 | 405 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
1dde716e | 406 | |
063c3378 PL |
407 | retry: |
408 | if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, | |
409 | 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
410 | return -EIO; | |
411 | } | |
1dde716e | 412 | |
063c3378 PL |
413 | while (!iTask.complete) { |
414 | iscsi_set_events(iscsilun); | |
415 | qemu_coroutine_yield(); | |
416 | } | |
1dde716e | 417 | |
063c3378 PL |
418 | if (iTask.task != NULL) { |
419 | scsi_free_scsi_task(iTask.task); | |
420 | iTask.task = NULL; | |
c589b249 RS |
421 | } |
422 | ||
063c3378 PL |
423 | if (iTask.do_retry) { |
424 | goto retry; | |
425 | } | |
c589b249 | 426 | |
063c3378 PL |
427 | if (iTask.status != SCSI_STATUS_GOOD) { |
428 | return -EIO; | |
429 | } | |
430 | ||
431 | return 0; | |
c589b249 RS |
432 | } |
433 | ||
98392453 RS |
434 | #ifdef __linux__ |
435 | static void | |
436 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
437 | void *command_data, void *opaque) | |
438 | { | |
439 | IscsiAIOCB *acb = opaque; | |
440 | ||
0a53f010 RS |
441 | g_free(acb->buf); |
442 | acb->buf = NULL; | |
443 | ||
b2090919 | 444 | if (acb->canceled != 0) { |
98392453 RS |
445 | return; |
446 | } | |
447 | ||
448 | acb->status = 0; | |
449 | if (status < 0) { | |
450 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
451 | iscsi_get_error(iscsi)); | |
452 | acb->status = -EIO; | |
453 | } | |
454 | ||
455 | acb->ioh->driver_status = 0; | |
456 | acb->ioh->host_status = 0; | |
457 | acb->ioh->resid = 0; | |
458 | ||
459 | #define SG_ERR_DRIVER_SENSE 0x08 | |
460 | ||
461 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
462 | int ss; | |
463 | ||
464 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
465 | ||
466 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
467 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
468 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
469 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
470 | } | |
471 | ||
cfb3f506 | 472 | iscsi_schedule_bh(acb); |
98392453 RS |
473 | } |
474 | ||
475 | static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, | |
476 | unsigned long int req, void *buf, | |
477 | BlockDriverCompletionFunc *cb, void *opaque) | |
478 | { | |
479 | IscsiLun *iscsilun = bs->opaque; | |
480 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
481 | struct iscsi_data data; | |
482 | IscsiAIOCB *acb; | |
483 | ||
484 | assert(req == SG_IO); | |
485 | ||
d7331bed | 486 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
487 | |
488 | acb->iscsilun = iscsilun; | |
489 | acb->canceled = 0; | |
1bd075f2 PB |
490 | acb->bh = NULL; |
491 | acb->status = -EINPROGRESS; | |
98392453 RS |
492 | acb->buf = NULL; |
493 | acb->ioh = buf; | |
494 | ||
495 | acb->task = malloc(sizeof(struct scsi_task)); | |
496 | if (acb->task == NULL) { | |
497 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
498 | iscsi_get_error(iscsi)); | |
499 | qemu_aio_release(acb); | |
500 | return NULL; | |
501 | } | |
502 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
503 | ||
504 | switch (acb->ioh->dxfer_direction) { | |
505 | case SG_DXFER_TO_DEV: | |
506 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
507 | break; | |
508 | case SG_DXFER_FROM_DEV: | |
509 | acb->task->xfer_dir = SCSI_XFER_READ; | |
510 | break; | |
511 | default: | |
512 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
513 | break; | |
514 | } | |
515 | ||
516 | acb->task->cdb_size = acb->ioh->cmd_len; | |
517 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
518 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
519 | ||
0a53f010 | 520 | data.size = 0; |
98392453 | 521 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
522 | if (acb->ioh->iovec_count == 0) { |
523 | data.data = acb->ioh->dxferp; | |
524 | data.size = acb->ioh->dxfer_len; | |
525 | } else { | |
526 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
527 | scsi_task_set_iov_out(acb->task, | |
528 | (struct scsi_iovec *) acb->ioh->dxferp, | |
529 | acb->ioh->iovec_count); | |
530 | #else | |
531 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
532 | ||
533 | acb->buf = g_malloc(acb->ioh->dxfer_len); | |
534 | data.data = acb->buf; | |
535 | data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0, | |
536 | acb->buf, acb->ioh->dxfer_len); | |
537 | #endif | |
538 | } | |
98392453 | 539 | } |
0a53f010 | 540 | |
98392453 RS |
541 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
542 | iscsi_aio_ioctl_cb, | |
0a53f010 | 543 | (data.size > 0) ? &data : NULL, |
98392453 RS |
544 | acb) != 0) { |
545 | scsi_free_scsi_task(acb->task); | |
546 | qemu_aio_release(acb); | |
547 | return NULL; | |
548 | } | |
549 | ||
550 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
551 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
552 | if (acb->ioh->iovec_count == 0) { |
553 | scsi_task_add_data_in_buffer(acb->task, | |
554 | acb->ioh->dxfer_len, | |
555 | acb->ioh->dxferp); | |
556 | } else { | |
557 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
558 | scsi_task_set_iov_in(acb->task, | |
559 | (struct scsi_iovec *) acb->ioh->dxferp, | |
560 | acb->ioh->iovec_count); | |
561 | #else | |
562 | int i; | |
563 | for (i = 0; i < acb->ioh->iovec_count; i++) { | |
564 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
565 | ||
566 | scsi_task_add_data_in_buffer(acb->task, | |
567 | iov[i].iov_len, | |
568 | iov[i].iov_base); | |
569 | } | |
570 | #endif | |
571 | } | |
98392453 RS |
572 | } |
573 | ||
574 | iscsi_set_events(iscsilun); | |
575 | ||
576 | return &acb->common; | |
577 | } | |
578 | ||
f1a12821 RS |
579 | |
580 | static void ioctl_cb(void *opaque, int status) | |
581 | { | |
582 | int *p_status = opaque; | |
583 | *p_status = status; | |
584 | } | |
585 | ||
98392453 RS |
586 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
587 | { | |
588 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 589 | int status; |
98392453 RS |
590 | |
591 | switch (req) { | |
592 | case SG_GET_VERSION_NUM: | |
593 | *(int *)buf = 30000; | |
594 | break; | |
595 | case SG_GET_SCSI_ID: | |
596 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
597 | break; | |
f1a12821 RS |
598 | case SG_IO: |
599 | status = -EINPROGRESS; | |
600 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
601 | ||
602 | while (status == -EINPROGRESS) { | |
603 | qemu_aio_wait(); | |
604 | } | |
605 | ||
606 | return 0; | |
98392453 RS |
607 | default: |
608 | return -1; | |
609 | } | |
610 | return 0; | |
611 | } | |
612 | #endif | |
613 | ||
c589b249 RS |
614 | static int64_t |
615 | iscsi_getlength(BlockDriverState *bs) | |
616 | { | |
617 | IscsiLun *iscsilun = bs->opaque; | |
618 | int64_t len; | |
619 | ||
620 | len = iscsilun->num_blocks; | |
621 | len *= iscsilun->block_size; | |
622 | ||
623 | return len; | |
624 | } | |
625 | ||
24c7608a | 626 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
f35c934a | 627 | |
54a5c1d5 PL |
628 | static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, |
629 | int64_t sector_num, | |
630 | int nb_sectors, int *pnum) | |
631 | { | |
632 | IscsiLun *iscsilun = bs->opaque; | |
633 | struct scsi_get_lba_status *lbas = NULL; | |
634 | struct scsi_lba_status_descriptor *lbasd = NULL; | |
635 | struct IscsiTask iTask; | |
636 | int64_t ret; | |
637 | ||
638 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
639 | ||
640 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
641 | ret = -EINVAL; | |
642 | goto out; | |
643 | } | |
644 | ||
645 | /* default to all sectors allocated */ | |
646 | ret = BDRV_BLOCK_DATA; | |
647 | ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; | |
648 | *pnum = nb_sectors; | |
649 | ||
650 | /* LUN does not support logical block provisioning */ | |
651 | if (iscsilun->lbpme == 0) { | |
652 | goto out; | |
653 | } | |
654 | ||
655 | retry: | |
656 | if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun, | |
657 | sector_qemu2lun(sector_num, iscsilun), | |
658 | 8 + 16, iscsi_co_generic_cb, | |
659 | &iTask) == NULL) { | |
660 | ret = -EIO; | |
661 | goto out; | |
662 | } | |
663 | ||
664 | while (!iTask.complete) { | |
665 | iscsi_set_events(iscsilun); | |
666 | qemu_coroutine_yield(); | |
667 | } | |
668 | ||
669 | if (iTask.do_retry) { | |
670 | if (iTask.task != NULL) { | |
671 | scsi_free_scsi_task(iTask.task); | |
672 | iTask.task = NULL; | |
673 | } | |
674 | goto retry; | |
675 | } | |
676 | ||
677 | if (iTask.status != SCSI_STATUS_GOOD) { | |
678 | /* in case the get_lba_status_callout fails (i.e. | |
679 | * because the device is busy or the cmd is not | |
680 | * supported) we pretend all blocks are allocated | |
73f395fa | 681 | * for backwards compatibility */ |
54a5c1d5 PL |
682 | goto out; |
683 | } | |
684 | ||
685 | lbas = scsi_datain_unmarshall(iTask.task); | |
686 | if (lbas == NULL) { | |
687 | ret = -EIO; | |
688 | goto out; | |
689 | } | |
690 | ||
691 | lbasd = &lbas->descriptors[0]; | |
692 | ||
693 | if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) { | |
694 | ret = -EIO; | |
695 | goto out; | |
696 | } | |
697 | ||
698 | *pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); | |
699 | if (*pnum > nb_sectors) { | |
700 | *pnum = nb_sectors; | |
701 | } | |
702 | ||
703 | if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED || | |
704 | lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { | |
705 | ret &= ~BDRV_BLOCK_DATA; | |
706 | if (iscsilun->lbprz) { | |
707 | ret |= BDRV_BLOCK_ZERO; | |
708 | } | |
709 | } | |
710 | ||
711 | out: | |
712 | if (iTask.task != NULL) { | |
713 | scsi_free_scsi_task(iTask.task); | |
714 | } | |
715 | return ret; | |
716 | } | |
717 | ||
24c7608a | 718 | #endif /* LIBISCSI_FEATURE_IOVECTOR */ |
f35c934a | 719 | |
65f3e339 PL |
720 | static int |
721 | coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, | |
722 | int nb_sectors) | |
723 | { | |
724 | IscsiLun *iscsilun = bs->opaque; | |
725 | struct IscsiTask iTask; | |
726 | struct unmap_list list; | |
65f3e339 PL |
727 | |
728 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
729 | return -EINVAL; | |
730 | } | |
731 | ||
732 | if (!iscsilun->lbp.lbpu) { | |
733 | /* UNMAP is not supported by the target */ | |
734 | return 0; | |
735 | } | |
736 | ||
737 | list.lba = sector_qemu2lun(sector_num, iscsilun); | |
01a6a238 | 738 | list.num = sector_qemu2lun(nb_sectors, iscsilun); |
65f3e339 | 739 | |
01a6a238 | 740 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
65f3e339 | 741 | retry: |
01a6a238 PL |
742 | if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
743 | iscsi_co_generic_cb, &iTask) == NULL) { | |
744 | return -EIO; | |
745 | } | |
65f3e339 | 746 | |
01a6a238 PL |
747 | while (!iTask.complete) { |
748 | iscsi_set_events(iscsilun); | |
749 | qemu_coroutine_yield(); | |
750 | } | |
65f3e339 | 751 | |
01a6a238 PL |
752 | if (iTask.task != NULL) { |
753 | scsi_free_scsi_task(iTask.task); | |
754 | iTask.task = NULL; | |
755 | } | |
65f3e339 | 756 | |
01a6a238 PL |
757 | if (iTask.do_retry) { |
758 | goto retry; | |
759 | } | |
65f3e339 | 760 | |
01a6a238 PL |
761 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION) { |
762 | /* the target might fail with a check condition if it | |
763 | is not happy with the alignment of the UNMAP request | |
764 | we silently fail in this case */ | |
765 | return 0; | |
766 | } | |
65f3e339 | 767 | |
01a6a238 PL |
768 | if (iTask.status != SCSI_STATUS_GOOD) { |
769 | return -EIO; | |
65f3e339 PL |
770 | } |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
d4cd9615 PL |
775 | #if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED) |
776 | ||
777 | static int | |
778 | coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, | |
779 | int nb_sectors, BdrvRequestFlags flags) | |
780 | { | |
781 | IscsiLun *iscsilun = bs->opaque; | |
782 | struct IscsiTask iTask; | |
783 | uint64_t lba; | |
784 | uint32_t nb_blocks; | |
785 | ||
786 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
787 | return -EINVAL; | |
788 | } | |
789 | ||
fa6252b0 PB |
790 | if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) { |
791 | /* WRITE SAME without UNMAP is not supported by the target */ | |
792 | return -ENOTSUP; | |
793 | } | |
794 | ||
795 | if ((flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->lbp.lbpws) { | |
796 | /* WRITE SAME with UNMAP is not supported by the target */ | |
d4cd9615 PL |
797 | return -ENOTSUP; |
798 | } | |
799 | ||
800 | lba = sector_qemu2lun(sector_num, iscsilun); | |
801 | nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); | |
802 | ||
803 | if (iscsilun->zeroblock == NULL) { | |
804 | iscsilun->zeroblock = g_malloc0(iscsilun->block_size); | |
805 | } | |
806 | ||
807 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
808 | retry: | |
809 | if (iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
810 | iscsilun->zeroblock, iscsilun->block_size, | |
811 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
812 | 0, 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
813 | return -EIO; | |
814 | } | |
815 | ||
816 | while (!iTask.complete) { | |
817 | iscsi_set_events(iscsilun); | |
818 | qemu_coroutine_yield(); | |
819 | } | |
820 | ||
821 | if (iTask.task != NULL) { | |
822 | scsi_free_scsi_task(iTask.task); | |
823 | iTask.task = NULL; | |
824 | } | |
825 | ||
826 | if (iTask.do_retry) { | |
827 | goto retry; | |
828 | } | |
829 | ||
830 | if (iTask.status != SCSI_STATUS_GOOD) { | |
fa6252b0 PB |
831 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION && |
832 | iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && | |
833 | iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) { | |
834 | /* WRITE SAME is not supported by the target */ | |
835 | iscsilun->has_write_same = false; | |
836 | return -ENOTSUP; | |
837 | } | |
838 | ||
d4cd9615 PL |
839 | return -EIO; |
840 | } | |
841 | ||
842 | return 0; | |
843 | } | |
844 | ||
845 | #endif /* SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED */ | |
846 | ||
f9dadc98 RS |
847 | static int parse_chap(struct iscsi_context *iscsi, const char *target) |
848 | { | |
849 | QemuOptsList *list; | |
850 | QemuOpts *opts; | |
851 | const char *user = NULL; | |
852 | const char *password = NULL; | |
853 | ||
854 | list = qemu_find_opts("iscsi"); | |
855 | if (!list) { | |
856 | return 0; | |
857 | } | |
858 | ||
859 | opts = qemu_opts_find(list, target); | |
860 | if (opts == NULL) { | |
861 | opts = QTAILQ_FIRST(&list->head); | |
862 | if (!opts) { | |
863 | return 0; | |
864 | } | |
865 | } | |
866 | ||
867 | user = qemu_opt_get(opts, "user"); | |
868 | if (!user) { | |
869 | return 0; | |
870 | } | |
871 | ||
872 | password = qemu_opt_get(opts, "password"); | |
873 | if (!password) { | |
874 | error_report("CHAP username specified but no password was given"); | |
875 | return -1; | |
876 | } | |
877 | ||
878 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
879 | error_report("Failed to set initiator username and password"); | |
880 | return -1; | |
881 | } | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target) | |
887 | { | |
888 | QemuOptsList *list; | |
889 | QemuOpts *opts; | |
890 | const char *digest = NULL; | |
891 | ||
892 | list = qemu_find_opts("iscsi"); | |
893 | if (!list) { | |
894 | return; | |
895 | } | |
896 | ||
897 | opts = qemu_opts_find(list, target); | |
898 | if (opts == NULL) { | |
899 | opts = QTAILQ_FIRST(&list->head); | |
900 | if (!opts) { | |
901 | return; | |
902 | } | |
903 | } | |
904 | ||
905 | digest = qemu_opt_get(opts, "header-digest"); | |
906 | if (!digest) { | |
907 | return; | |
908 | } | |
909 | ||
910 | if (!strcmp(digest, "CRC32C")) { | |
911 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
912 | } else if (!strcmp(digest, "NONE")) { | |
913 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
914 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
915 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
916 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
917 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
918 | } else { | |
919 | error_report("Invalid header-digest setting : %s", digest); | |
920 | } | |
921 | } | |
922 | ||
923 | static char *parse_initiator_name(const char *target) | |
924 | { | |
925 | QemuOptsList *list; | |
926 | QemuOpts *opts; | |
5accc840 PB |
927 | const char *name; |
928 | char *iscsi_name; | |
929 | UuidInfo *uuid_info; | |
f9dadc98 RS |
930 | |
931 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
932 | if (list) { |
933 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 934 | if (!opts) { |
f2ef4a6d PB |
935 | opts = QTAILQ_FIRST(&list->head); |
936 | } | |
937 | if (opts) { | |
938 | name = qemu_opt_get(opts, "initiator-name"); | |
5accc840 PB |
939 | if (name) { |
940 | return g_strdup(name); | |
941 | } | |
f9dadc98 RS |
942 | } |
943 | } | |
944 | ||
5accc840 PB |
945 | uuid_info = qmp_query_uuid(NULL); |
946 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
947 | name = qemu_get_vm_name(); | |
f2ef4a6d | 948 | } else { |
5accc840 | 949 | name = uuid_info->UUID; |
f9dadc98 | 950 | } |
5accc840 PB |
951 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
952 | name ? ":" : "", name ? name : ""); | |
953 | qapi_free_UuidInfo(uuid_info); | |
954 | return iscsi_name; | |
f9dadc98 RS |
955 | } |
956 | ||
5b5d34ec PL |
957 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
958 | static void iscsi_nop_timed_event(void *opaque) | |
959 | { | |
960 | IscsiLun *iscsilun = opaque; | |
961 | ||
962 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
963 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
964 | iscsi_reconnect(iscsilun->iscsi); | |
965 | } | |
966 | ||
967 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
968 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
969 | return; | |
970 | } | |
971 | ||
bc72ad67 | 972 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec PL |
973 | iscsi_set_events(iscsilun); |
974 | } | |
975 | #endif | |
976 | ||
cb1b83e7 PL |
977 | static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
978 | { | |
979 | struct scsi_task *task = NULL; | |
980 | struct scsi_readcapacity10 *rc10 = NULL; | |
981 | struct scsi_readcapacity16 *rc16 = NULL; | |
982 | int ret = 0; | |
983 | int retries = ISCSI_CMD_RETRIES; | |
984 | ||
1288844e PB |
985 | do { |
986 | if (task != NULL) { | |
987 | scsi_free_scsi_task(task); | |
988 | task = NULL; | |
cb1b83e7 | 989 | } |
1288844e PB |
990 | |
991 | switch (iscsilun->type) { | |
992 | case TYPE_DISK: | |
993 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
994 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
995 | rc16 = scsi_datain_unmarshall(task); | |
996 | if (rc16 == NULL) { | |
997 | error_report("iSCSI: Failed to unmarshall readcapacity16 data."); | |
998 | ret = -EINVAL; | |
999 | } else { | |
1000 | iscsilun->block_size = rc16->block_length; | |
1001 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
f18a7cbb PL |
1002 | iscsilun->lbpme = rc16->lbpme; |
1003 | iscsilun->lbprz = rc16->lbprz; | |
1288844e PB |
1004 | } |
1005 | } | |
1006 | break; | |
1007 | case TYPE_ROM: | |
1008 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1009 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1010 | rc10 = scsi_datain_unmarshall(task); | |
1011 | if (rc10 == NULL) { | |
1012 | error_report("iSCSI: Failed to unmarshall readcapacity10 data."); | |
1013 | ret = -EINVAL; | |
1014 | } else { | |
1015 | iscsilun->block_size = rc10->block_size; | |
1016 | if (rc10->lba == 0) { | |
1017 | /* blank disk loaded */ | |
1018 | iscsilun->num_blocks = 0; | |
1019 | } else { | |
1020 | iscsilun->num_blocks = rc10->lba + 1; | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | break; | |
1025 | default: | |
1026 | return 0; | |
cb1b83e7 | 1027 | } |
1288844e PB |
1028 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1029 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1030 | && retries-- > 0); | |
cb1b83e7 | 1031 | |
1288844e PB |
1032 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1033 | error_report("iSCSI: failed to send readcapacity10 command."); | |
1034 | ret = -EINVAL; | |
1035 | } | |
cb1b83e7 PL |
1036 | if (task) { |
1037 | scsi_free_scsi_task(task); | |
1038 | } | |
cb1b83e7 PL |
1039 | return ret; |
1040 | } | |
1041 | ||
60beb341 KW |
1042 | /* TODO Convert to fine grained options */ |
1043 | static QemuOptsList runtime_opts = { | |
1044 | .name = "iscsi", | |
1045 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1046 | .desc = { | |
1047 | { | |
1048 | .name = "filename", | |
1049 | .type = QEMU_OPT_STRING, | |
1050 | .help = "URL to the iscsi image", | |
1051 | }, | |
1052 | { /* end of list */ } | |
1053 | }, | |
1054 | }; | |
1055 | ||
f18a7cbb PL |
1056 | static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, |
1057 | int lun, int evpd, int pc) { | |
1058 | int full_size; | |
1059 | struct scsi_task *task = NULL; | |
1060 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64); | |
1061 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1062 | goto fail; | |
1063 | } | |
1064 | full_size = scsi_datain_getfullsize(task); | |
1065 | if (full_size > task->datain.size) { | |
1066 | scsi_free_scsi_task(task); | |
1067 | ||
1068 | /* we need more data for the full list */ | |
1069 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); | |
1070 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1071 | goto fail; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | return task; | |
1076 | ||
1077 | fail: | |
1078 | error_report("iSCSI: Inquiry command failed : %s", | |
1079 | iscsi_get_error(iscsi)); | |
1080 | if (task) { | |
1081 | scsi_free_scsi_task(task); | |
1082 | return NULL; | |
1083 | } | |
1084 | return NULL; | |
1085 | } | |
1086 | ||
c589b249 RS |
1087 | /* |
1088 | * We support iscsi url's on the form | |
1089 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1090 | */ | |
015a1036 HR |
1091 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1092 | Error **errp) | |
c589b249 RS |
1093 | { |
1094 | IscsiLun *iscsilun = bs->opaque; | |
1095 | struct iscsi_context *iscsi = NULL; | |
1096 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1097 | struct scsi_task *task = NULL; |
1098 | struct scsi_inquiry_standard *inq = NULL; | |
f9dadc98 | 1099 | char *initiator_name = NULL; |
60beb341 KW |
1100 | QemuOpts *opts; |
1101 | Error *local_err = NULL; | |
1102 | const char *filename; | |
c589b249 RS |
1103 | int ret; |
1104 | ||
1105 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
1106 | error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. " | |
1107 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
1108 | "of 512", BDRV_SECTOR_SIZE); | |
1109 | return -EINVAL; | |
1110 | } | |
1111 | ||
60beb341 KW |
1112 | opts = qemu_opts_create_nofail(&runtime_opts); |
1113 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
1114 | if (error_is_set(&local_err)) { | |
1115 | qerror_report_err(local_err); | |
1116 | error_free(local_err); | |
1117 | ret = -EINVAL; | |
1118 | goto out; | |
1119 | } | |
1120 | ||
1121 | filename = qemu_opt_get(opts, "filename"); | |
1122 | ||
1123 | ||
c589b249 RS |
1124 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1125 | if (iscsi_url == NULL) { | |
8da1e18b | 1126 | error_report("Failed to parse URL : %s", filename); |
c589b249 | 1127 | ret = -EINVAL; |
b93c94f7 | 1128 | goto out; |
c589b249 RS |
1129 | } |
1130 | ||
f9dadc98 RS |
1131 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1132 | ||
1133 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1134 | ||
1135 | iscsi = iscsi_create_context(initiator_name); | |
1136 | if (iscsi == NULL) { | |
1137 | error_report("iSCSI: Failed to create iSCSI context."); | |
1138 | ret = -ENOMEM; | |
b93c94f7 | 1139 | goto out; |
f9dadc98 RS |
1140 | } |
1141 | ||
c589b249 RS |
1142 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
1143 | error_report("iSCSI: Failed to set target name."); | |
1144 | ret = -EINVAL; | |
b93c94f7 | 1145 | goto out; |
c589b249 RS |
1146 | } |
1147 | ||
1148 | if (iscsi_url->user != NULL) { | |
1149 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
1150 | iscsi_url->passwd); | |
1151 | if (ret != 0) { | |
1152 | error_report("Failed to set initiator username and password"); | |
1153 | ret = -EINVAL; | |
b93c94f7 | 1154 | goto out; |
c589b249 RS |
1155 | } |
1156 | } | |
f9dadc98 RS |
1157 | |
1158 | /* check if we got CHAP username/password via the options */ | |
1159 | if (parse_chap(iscsi, iscsi_url->target) != 0) { | |
1160 | error_report("iSCSI: Failed to set CHAP user/password"); | |
1161 | ret = -EINVAL; | |
b93c94f7 | 1162 | goto out; |
f9dadc98 RS |
1163 | } |
1164 | ||
c589b249 RS |
1165 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1166 | error_report("iSCSI: Failed to set session type to normal."); | |
1167 | ret = -EINVAL; | |
b93c94f7 | 1168 | goto out; |
c589b249 RS |
1169 | } |
1170 | ||
1171 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1172 | ||
f9dadc98 RS |
1173 | /* check if we got HEADER_DIGEST via the options */ |
1174 | parse_header_digest(iscsi, iscsi_url->target); | |
1175 | ||
e829b0bb PL |
1176 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1177 | error_report("iSCSI: Failed to connect to LUN : %s", | |
1178 | iscsi_get_error(iscsi)); | |
1179 | ret = -EINVAL; | |
1180 | goto out; | |
1181 | } | |
c589b249 RS |
1182 | |
1183 | iscsilun->iscsi = iscsi; | |
1184 | iscsilun->lun = iscsi_url->lun; | |
1185 | ||
e829b0bb PL |
1186 | task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1187 | ||
1188 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1189 | error_report("iSCSI: failed to send inquiry command."); | |
c589b249 | 1190 | ret = -EINVAL; |
b93c94f7 | 1191 | goto out; |
c589b249 RS |
1192 | } |
1193 | ||
e829b0bb PL |
1194 | inq = scsi_datain_unmarshall(task); |
1195 | if (inq == NULL) { | |
1196 | error_report("iSCSI: Failed to unmarshall inquiry data."); | |
c589b249 | 1197 | ret = -EINVAL; |
b93c94f7 | 1198 | goto out; |
c589b249 | 1199 | } |
622695a4 | 1200 | |
e829b0bb | 1201 | iscsilun->type = inq->periperal_device_type; |
fa6252b0 | 1202 | iscsilun->has_write_same = true; |
e829b0bb | 1203 | |
cb1b83e7 PL |
1204 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1205 | goto out; | |
e829b0bb | 1206 | } |
0777b5dd | 1207 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
e829b0bb | 1208 | |
622695a4 RS |
1209 | /* Medium changer or tape. We dont have any emulation for this so this must |
1210 | * be sg ioctl compatible. We force it to be sg, otherwise qemu will try | |
1211 | * to read from the device to guess the image format. | |
1212 | */ | |
1213 | if (iscsilun->type == TYPE_MEDIUM_CHANGER || | |
1214 | iscsilun->type == TYPE_TAPE) { | |
1215 | bs->sg = 1; | |
1216 | } | |
1217 | ||
f18a7cbb PL |
1218 | if (iscsilun->lbpme) { |
1219 | struct scsi_inquiry_logical_block_provisioning *inq_lbp; | |
1220 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1221 | SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING); | |
1222 | if (task == NULL) { | |
1223 | ret = -EINVAL; | |
1224 | goto out; | |
1225 | } | |
1226 | inq_lbp = scsi_datain_unmarshall(task); | |
1227 | if (inq_lbp == NULL) { | |
1228 | error_report("iSCSI: failed to unmarshall inquiry datain blob"); | |
1229 | ret = -EINVAL; | |
1230 | goto out; | |
1231 | } | |
1232 | memcpy(&iscsilun->lbp, inq_lbp, | |
1233 | sizeof(struct scsi_inquiry_logical_block_provisioning)); | |
1234 | scsi_free_scsi_task(task); | |
1235 | task = NULL; | |
1236 | } | |
1237 | ||
1238 | if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) { | |
1239 | struct scsi_inquiry_block_limits *inq_bl; | |
1240 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1241 | SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS); | |
1242 | if (task == NULL) { | |
1243 | ret = -EINVAL; | |
1244 | goto out; | |
1245 | } | |
1246 | inq_bl = scsi_datain_unmarshall(task); | |
1247 | if (inq_bl == NULL) { | |
1248 | error_report("iSCSI: failed to unmarshall inquiry datain blob"); | |
1249 | ret = -EINVAL; | |
1250 | goto out; | |
1251 | } | |
1252 | memcpy(&iscsilun->bl, inq_bl, | |
1253 | sizeof(struct scsi_inquiry_block_limits)); | |
1254 | scsi_free_scsi_task(task); | |
1255 | task = NULL; | |
ba6c5919 PL |
1256 | |
1257 | if (iscsilun->bl.max_unmap < 0xffffffff) { | |
1258 | bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, | |
1259 | iscsilun); | |
1260 | } | |
1261 | bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, | |
1262 | iscsilun); | |
1263 | ||
1264 | if (iscsilun->bl.max_ws_len < 0xffffffff) { | |
1265 | bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, | |
1266 | iscsilun); | |
1267 | } | |
1268 | bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, | |
1269 | iscsilun); | |
7572ddc8 PL |
1270 | |
1271 | bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len, | |
1272 | iscsilun); | |
f18a7cbb PL |
1273 | } |
1274 | ||
5b5d34ec PL |
1275 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
1276 | /* Set up a timer for sending out iSCSI NOPs */ | |
bc72ad67 AB |
1277 | iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
1278 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
5b5d34ec PL |
1279 | #endif |
1280 | ||
b93c94f7 | 1281 | out: |
60beb341 | 1282 | qemu_opts_del(opts); |
f9dadc98 RS |
1283 | if (initiator_name != NULL) { |
1284 | g_free(initiator_name); | |
1285 | } | |
c589b249 RS |
1286 | if (iscsi_url != NULL) { |
1287 | iscsi_destroy_url(iscsi_url); | |
1288 | } | |
e829b0bb PL |
1289 | if (task != NULL) { |
1290 | scsi_free_scsi_task(task); | |
1291 | } | |
b93c94f7 PB |
1292 | |
1293 | if (ret) { | |
1294 | if (iscsi != NULL) { | |
1295 | iscsi_destroy_context(iscsi); | |
1296 | } | |
1297 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1298 | } |
c589b249 RS |
1299 | return ret; |
1300 | } | |
1301 | ||
1302 | static void iscsi_close(BlockDriverState *bs) | |
1303 | { | |
1304 | IscsiLun *iscsilun = bs->opaque; | |
1305 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1306 | ||
5b5d34ec | 1307 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1308 | timer_del(iscsilun->nop_timer); |
1309 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1310 | } |
f2e5dca4 | 1311 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
c589b249 | 1312 | iscsi_destroy_context(iscsi); |
d4cd9615 | 1313 | g_free(iscsilun->zeroblock); |
c589b249 RS |
1314 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1315 | } | |
1316 | ||
cb1b83e7 PL |
1317 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1318 | { | |
1319 | IscsiLun *iscsilun = bs->opaque; | |
1320 | int ret = 0; | |
1321 | ||
1322 | if (iscsilun->type != TYPE_DISK) { | |
1323 | return -ENOTSUP; | |
1324 | } | |
1325 | ||
1326 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { | |
1327 | return ret; | |
1328 | } | |
1329 | ||
1330 | if (offset > iscsi_getlength(bs)) { | |
1331 | return -EINVAL; | |
1332 | } | |
1333 | ||
1334 | return 0; | |
1335 | } | |
1336 | ||
d5124c00 HR |
1337 | static int iscsi_create(const char *filename, QEMUOptionParameter *options, |
1338 | Error **errp) | |
de8864e5 PL |
1339 | { |
1340 | int ret = 0; | |
1341 | int64_t total_size = 0; | |
13c91cb7 | 1342 | BlockDriverState *bs; |
de8864e5 | 1343 | IscsiLun *iscsilun = NULL; |
60beb341 | 1344 | QDict *bs_options; |
de8864e5 | 1345 | |
13c91cb7 | 1346 | bs = bdrv_new(""); |
de8864e5 PL |
1347 | |
1348 | /* Read out options */ | |
1349 | while (options && options->name) { | |
1350 | if (!strcmp(options->name, "size")) { | |
1351 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
1352 | } | |
1353 | options++; | |
1354 | } | |
1355 | ||
13c91cb7 FZ |
1356 | bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
1357 | iscsilun = bs->opaque; | |
de8864e5 | 1358 | |
60beb341 KW |
1359 | bs_options = qdict_new(); |
1360 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
015a1036 | 1361 | ret = iscsi_open(bs, bs_options, 0, NULL); |
60beb341 KW |
1362 | QDECREF(bs_options); |
1363 | ||
de8864e5 PL |
1364 | if (ret != 0) { |
1365 | goto out; | |
1366 | } | |
5b5d34ec | 1367 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1368 | timer_del(iscsilun->nop_timer); |
1369 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1370 | } |
de8864e5 PL |
1371 | if (iscsilun->type != TYPE_DISK) { |
1372 | ret = -ENODEV; | |
1373 | goto out; | |
1374 | } | |
13c91cb7 | 1375 | if (bs->total_sectors < total_size) { |
de8864e5 | 1376 | ret = -ENOSPC; |
d3bda7bc | 1377 | goto out; |
de8864e5 PL |
1378 | } |
1379 | ||
1380 | ret = 0; | |
1381 | out: | |
1382 | if (iscsilun->iscsi != NULL) { | |
1383 | iscsi_destroy_context(iscsilun->iscsi); | |
1384 | } | |
13c91cb7 FZ |
1385 | g_free(bs->opaque); |
1386 | bs->opaque = NULL; | |
4f6fd349 | 1387 | bdrv_unref(bs); |
de8864e5 PL |
1388 | return ret; |
1389 | } | |
1390 | ||
186d4f2b PL |
1391 | static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1392 | { | |
1393 | IscsiLun *iscsilun = bs->opaque; | |
1394 | bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz; | |
1395 | bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; | |
1c0704a5 PL |
1396 | /* Guess the internal cluster (page) size of the iscsi target by the means |
1397 | * of opt_unmap_gran. Transfer the unmap granularity only if it has a | |
1398 | * reasonable size for bdi->cluster_size */ | |
1399 | if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 && | |
1400 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { | |
1401 | bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size; | |
1402 | } | |
186d4f2b PL |
1403 | return 0; |
1404 | } | |
1405 | ||
de8864e5 PL |
1406 | static QEMUOptionParameter iscsi_create_options[] = { |
1407 | { | |
1408 | .name = BLOCK_OPT_SIZE, | |
1409 | .type = OPT_SIZE, | |
1410 | .help = "Virtual disk size" | |
1411 | }, | |
1412 | { NULL } | |
1413 | }; | |
1414 | ||
c589b249 RS |
1415 | static BlockDriver bdrv_iscsi = { |
1416 | .format_name = "iscsi", | |
1417 | .protocol_name = "iscsi", | |
1418 | ||
1419 | .instance_size = sizeof(IscsiLun), | |
030be321 | 1420 | .bdrv_needs_filename = true, |
c589b249 RS |
1421 | .bdrv_file_open = iscsi_open, |
1422 | .bdrv_close = iscsi_close, | |
de8864e5 PL |
1423 | .bdrv_create = iscsi_create, |
1424 | .create_options = iscsi_create_options, | |
c589b249 RS |
1425 | |
1426 | .bdrv_getlength = iscsi_getlength, | |
186d4f2b | 1427 | .bdrv_get_info = iscsi_get_info, |
cb1b83e7 | 1428 | .bdrv_truncate = iscsi_truncate, |
c589b249 | 1429 | |
24c7608a | 1430 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
54a5c1d5 | 1431 | .bdrv_co_get_block_status = iscsi_co_get_block_status, |
f35c934a | 1432 | #endif |
65f3e339 | 1433 | .bdrv_co_discard = iscsi_co_discard, |
d4cd9615 PL |
1434 | #if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED) |
1435 | .bdrv_co_write_zeroes = iscsi_co_write_zeroes, | |
1436 | #endif | |
063c3378 PL |
1437 | .bdrv_co_readv = iscsi_co_readv, |
1438 | .bdrv_co_writev = iscsi_co_writev, | |
1439 | .bdrv_co_flush_to_disk = iscsi_co_flush, | |
fa6acb0c | 1440 | |
98392453 RS |
1441 | #ifdef __linux__ |
1442 | .bdrv_ioctl = iscsi_ioctl, | |
1443 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1444 | #endif | |
c589b249 RS |
1445 | }; |
1446 | ||
4d454574 PB |
1447 | static QemuOptsList qemu_iscsi_opts = { |
1448 | .name = "iscsi", | |
1449 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1450 | .desc = { | |
1451 | { | |
1452 | .name = "user", | |
1453 | .type = QEMU_OPT_STRING, | |
1454 | .help = "username for CHAP authentication to target", | |
1455 | },{ | |
1456 | .name = "password", | |
1457 | .type = QEMU_OPT_STRING, | |
1458 | .help = "password for CHAP authentication to target", | |
1459 | },{ | |
1460 | .name = "header-digest", | |
1461 | .type = QEMU_OPT_STRING, | |
1462 | .help = "HeaderDigest setting. " | |
1463 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1464 | },{ | |
1465 | .name = "initiator-name", | |
1466 | .type = QEMU_OPT_STRING, | |
1467 | .help = "Initiator iqn name to use when connecting", | |
1468 | }, | |
1469 | { /* end of list */ } | |
1470 | }, | |
1471 | }; | |
1472 | ||
c589b249 RS |
1473 | static void iscsi_block_init(void) |
1474 | { | |
1475 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1476 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1477 | } |
1478 | ||
1479 | block_init(iscsi_block_init); |