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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; | |
8b9dfe90 | 71 | QEMUBH *bh; |
54a5c1d5 PL |
72 | } IscsiTask; |
73 | ||
c589b249 RS |
74 | typedef struct IscsiAIOCB { |
75 | BlockDriverAIOCB common; | |
76 | QEMUIOVector *qiov; | |
77 | QEMUBH *bh; | |
78 | IscsiLun *iscsilun; | |
79 | struct scsi_task *task; | |
80 | uint8_t *buf; | |
81 | int status; | |
82 | int canceled; | |
1dde716e | 83 | int retries; |
1dde716e PL |
84 | int64_t sector_num; |
85 | int nb_sectors; | |
98392453 RS |
86 | #ifdef __linux__ |
87 | sg_io_hdr_t *ioh; | |
88 | #endif | |
c589b249 RS |
89 | } IscsiAIOCB; |
90 | ||
5b5d34ec PL |
91 | #define NOP_INTERVAL 5000 |
92 | #define MAX_NOP_FAILURES 3 | |
1dde716e | 93 | #define ISCSI_CMD_RETRIES 5 |
5b5d34ec | 94 | |
27cbd828 | 95 | static void |
cfb3f506 | 96 | iscsi_bh_cb(void *p) |
27cbd828 PB |
97 | { |
98 | IscsiAIOCB *acb = p; | |
99 | ||
100 | qemu_bh_delete(acb->bh); | |
101 | ||
4790b03d PB |
102 | g_free(acb->buf); |
103 | acb->buf = NULL; | |
104 | ||
27cbd828 PB |
105 | if (acb->canceled == 0) { |
106 | acb->common.cb(acb->common.opaque, acb->status); | |
107 | } | |
108 | ||
1bd075f2 PB |
109 | if (acb->task != NULL) { |
110 | scsi_free_scsi_task(acb->task); | |
111 | acb->task = NULL; | |
112 | } | |
113 | ||
27cbd828 PB |
114 | qemu_aio_release(acb); |
115 | } | |
116 | ||
cfb3f506 PB |
117 | static void |
118 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 119 | { |
1bd075f2 PB |
120 | if (acb->bh) { |
121 | return; | |
122 | } | |
cfb3f506 | 123 | acb->bh = qemu_bh_new(iscsi_bh_cb, acb); |
27cbd828 | 124 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
125 | } |
126 | ||
8b9dfe90 PL |
127 | static void iscsi_co_generic_bh_cb(void *opaque) |
128 | { | |
129 | struct IscsiTask *iTask = opaque; | |
130 | qemu_bh_delete(iTask->bh); | |
131 | qemu_coroutine_enter(iTask->co, NULL); | |
132 | } | |
133 | ||
54a5c1d5 PL |
134 | static void |
135 | iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, | |
136 | void *command_data, void *opaque) | |
137 | { | |
138 | struct IscsiTask *iTask = opaque; | |
139 | struct scsi_task *task = command_data; | |
140 | ||
141 | iTask->complete = 1; | |
142 | iTask->status = status; | |
143 | iTask->do_retry = 0; | |
144 | iTask->task = task; | |
145 | ||
146 | if (iTask->retries-- > 0 && status == SCSI_STATUS_CHECK_CONDITION | |
147 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
148 | iTask->do_retry = 1; | |
149 | goto out; | |
150 | } | |
151 | ||
152 | if (status != SCSI_STATUS_GOOD) { | |
153 | error_report("iSCSI: Failure. %s", iscsi_get_error(iscsi)); | |
154 | } | |
155 | ||
156 | out: | |
157 | if (iTask->co) { | |
8b9dfe90 PL |
158 | iTask->bh = qemu_bh_new(iscsi_co_generic_bh_cb, iTask); |
159 | qemu_bh_schedule(iTask->bh); | |
54a5c1d5 PL |
160 | } |
161 | } | |
162 | ||
163 | static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) | |
164 | { | |
165 | *iTask = (struct IscsiTask) { | |
166 | .co = qemu_coroutine_self(), | |
167 | .retries = ISCSI_CMD_RETRIES, | |
168 | }; | |
169 | } | |
27cbd828 | 170 | |
c589b249 RS |
171 | static void |
172 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
173 | void *private_data) | |
174 | { | |
1bd075f2 PB |
175 | IscsiAIOCB *acb = private_data; |
176 | ||
177 | acb->status = -ECANCELED; | |
178 | iscsi_schedule_bh(acb); | |
c589b249 RS |
179 | } |
180 | ||
181 | static void | |
182 | iscsi_aio_cancel(BlockDriverAIOCB *blockacb) | |
183 | { | |
184 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
185 | IscsiLun *iscsilun = acb->iscsilun; | |
186 | ||
1bd075f2 PB |
187 | if (acb->status != -EINPROGRESS) { |
188 | return; | |
189 | } | |
190 | ||
b2090919 | 191 | acb->canceled = 1; |
c589b249 | 192 | |
b2090919 | 193 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 194 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 195 | iscsi_abort_task_cb, acb); |
b2090919 | 196 | |
1bd075f2 PB |
197 | while (acb->status == -EINPROGRESS) { |
198 | qemu_aio_wait(); | |
199 | } | |
c589b249 RS |
200 | } |
201 | ||
d7331bed | 202 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 RS |
203 | .aiocb_size = sizeof(IscsiAIOCB), |
204 | .cancel = iscsi_aio_cancel, | |
205 | }; | |
206 | ||
207 | ||
208 | static void iscsi_process_read(void *arg); | |
209 | static void iscsi_process_write(void *arg); | |
210 | ||
c589b249 RS |
211 | static void |
212 | iscsi_set_events(IscsiLun *iscsilun) | |
213 | { | |
214 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
c9b9f682 RS |
215 | int ev; |
216 | ||
217 | /* We always register a read handler. */ | |
218 | ev = POLLIN; | |
219 | ev |= iscsi_which_events(iscsi); | |
220 | if (ev != iscsilun->events) { | |
221 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), | |
222 | iscsi_process_read, | |
223 | (ev & POLLOUT) ? iscsi_process_write : NULL, | |
c9b9f682 RS |
224 | iscsilun); |
225 | ||
226 | } | |
227 | ||
c9b9f682 | 228 | iscsilun->events = ev; |
c589b249 RS |
229 | } |
230 | ||
231 | static void | |
232 | iscsi_process_read(void *arg) | |
233 | { | |
234 | IscsiLun *iscsilun = arg; | |
235 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
236 | ||
237 | iscsi_service(iscsi, POLLIN); | |
238 | iscsi_set_events(iscsilun); | |
239 | } | |
240 | ||
241 | static void | |
242 | iscsi_process_write(void *arg) | |
243 | { | |
244 | IscsiLun *iscsilun = arg; | |
245 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
246 | ||
247 | iscsi_service(iscsi, POLLOUT); | |
248 | iscsi_set_events(iscsilun); | |
249 | } | |
250 | ||
0777b5dd PL |
251 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
252 | { | |
253 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
254 | } | |
255 | ||
c589b249 RS |
256 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
257 | { | |
258 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
259 | } | |
260 | ||
91bea4e2 PL |
261 | static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
262 | IscsiLun *iscsilun) | |
263 | { | |
264 | if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size || | |
265 | (nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { | |
f5075224 RJ |
266 | error_report("iSCSI misaligned request: " |
267 | "iscsilun->block_size %u, sector_num %" PRIi64 | |
268 | ", nb_sectors %d", | |
91bea4e2 PL |
269 | iscsilun->block_size, sector_num, nb_sectors); |
270 | return 0; | |
271 | } | |
272 | return 1; | |
273 | } | |
274 | ||
063c3378 PL |
275 | static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, |
276 | int64_t sector_num, int nb_sectors, | |
277 | QEMUIOVector *iov) | |
c589b249 | 278 | { |
063c3378 PL |
279 | IscsiLun *iscsilun = bs->opaque; |
280 | struct IscsiTask iTask; | |
f4dfa67f | 281 | uint64_t lba; |
063c3378 PL |
282 | uint32_t num_sectors; |
283 | uint8_t *data = NULL; | |
284 | uint8_t *buf = NULL; | |
c589b249 | 285 | |
063c3378 PL |
286 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
287 | return -EINVAL; | |
288 | } | |
7371d56f | 289 | |
063c3378 PL |
290 | lba = sector_qemu2lun(sector_num, iscsilun); |
291 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
7371d56f | 292 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
4cc841b5 | 293 | /* if the iovec only contains one buffer we can pass it directly */ |
063c3378 PL |
294 | if (iov->niov == 1) { |
295 | data = iov->iov[0].iov_base; | |
4cc841b5 | 296 | } else { |
063c3378 PL |
297 | size_t size = MIN(nb_sectors * BDRV_SECTOR_SIZE, iov->size); |
298 | buf = g_malloc(size); | |
299 | qemu_iovec_to_buf(iov, 0, buf, size); | |
300 | data = buf; | |
4cc841b5 | 301 | } |
7371d56f | 302 | #endif |
063c3378 PL |
303 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
304 | retry: | |
305 | iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
306 | data, num_sectors * iscsilun->block_size, | |
307 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
308 | iscsi_co_generic_cb, &iTask); | |
309 | if (iTask.task == NULL) { | |
310 | g_free(buf); | |
92397116 | 311 | return -ENOMEM; |
f4dfa67f | 312 | } |
7371d56f | 313 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
063c3378 PL |
314 | scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, |
315 | iov->niov); | |
7371d56f | 316 | #endif |
063c3378 PL |
317 | while (!iTask.complete) { |
318 | iscsi_set_events(iscsilun); | |
319 | qemu_coroutine_yield(); | |
c589b249 RS |
320 | } |
321 | ||
063c3378 PL |
322 | if (iTask.task != NULL) { |
323 | scsi_free_scsi_task(iTask.task); | |
324 | iTask.task = NULL; | |
91bea4e2 PL |
325 | } |
326 | ||
063c3378 PL |
327 | if (iTask.do_retry) { |
328 | goto retry; | |
1dde716e PL |
329 | } |
330 | ||
063c3378 | 331 | g_free(buf); |
c589b249 | 332 | |
063c3378 PL |
333 | if (iTask.status != SCSI_STATUS_GOOD) { |
334 | return -EIO; | |
c589b249 RS |
335 | } |
336 | ||
063c3378 | 337 | return 0; |
c589b249 RS |
338 | } |
339 | ||
063c3378 PL |
340 | static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
341 | int64_t sector_num, int nb_sectors, | |
342 | QEMUIOVector *iov) | |
c589b249 | 343 | { |
063c3378 PL |
344 | IscsiLun *iscsilun = bs->opaque; |
345 | struct IscsiTask iTask; | |
1dde716e PL |
346 | uint64_t lba; |
347 | uint32_t num_sectors; | |
7371d56f | 348 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
c589b249 | 349 | int i; |
7371d56f | 350 | #endif |
c589b249 | 351 | |
063c3378 PL |
352 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
353 | return -EINVAL; | |
f4dfa67f | 354 | } |
f4dfa67f | 355 | |
063c3378 PL |
356 | lba = sector_qemu2lun(sector_num, iscsilun); |
357 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
f4dfa67f | 358 | |
063c3378 PL |
359 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
360 | retry: | |
361 | switch (iscsilun->type) { | |
f4dfa67f | 362 | case TYPE_DISK: |
063c3378 PL |
363 | iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
364 | num_sectors * iscsilun->block_size, | |
365 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
366 | iscsi_co_generic_cb, &iTask); | |
f4dfa67f RS |
367 | break; |
368 | default: | |
063c3378 PL |
369 | iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
370 | num_sectors * iscsilun->block_size, | |
219c2521 SW |
371 | iscsilun->block_size, |
372 | #if !defined(CONFIG_LIBISCSI_1_4) /* API change from 1.4.0 to 1.5.0 */ | |
373 | 0, 0, 0, 0, 0, | |
374 | #endif | |
063c3378 | 375 | iscsi_co_generic_cb, &iTask); |
f4dfa67f RS |
376 | break; |
377 | } | |
063c3378 | 378 | if (iTask.task == NULL) { |
92397116 | 379 | return -ENOMEM; |
c589b249 | 380 | } |
7371d56f | 381 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
063c3378 | 382 | scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); |
7371d56f | 383 | #else |
063c3378 PL |
384 | for (i = 0; i < iov->niov; i++) { |
385 | scsi_task_add_data_in_buffer(iTask.task, | |
386 | iov->iov[i].iov_len, | |
387 | iov->iov[i].iov_base); | |
c589b249 | 388 | } |
7371d56f | 389 | #endif |
91bea4e2 | 390 | |
063c3378 PL |
391 | while (!iTask.complete) { |
392 | iscsi_set_events(iscsilun); | |
393 | qemu_coroutine_yield(); | |
1dde716e | 394 | } |
c589b249 | 395 | |
063c3378 PL |
396 | if (iTask.task != NULL) { |
397 | scsi_free_scsi_task(iTask.task); | |
398 | iTask.task = NULL; | |
c589b249 RS |
399 | } |
400 | ||
063c3378 PL |
401 | if (iTask.do_retry) { |
402 | goto retry; | |
c589b249 RS |
403 | } |
404 | ||
063c3378 PL |
405 | if (iTask.status != SCSI_STATUS_GOOD) { |
406 | return -EIO; | |
1dde716e PL |
407 | } |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
063c3378 | 412 | static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
1dde716e PL |
413 | { |
414 | IscsiLun *iscsilun = bs->opaque; | |
063c3378 | 415 | struct IscsiTask iTask; |
1dde716e | 416 | |
063c3378 | 417 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
1dde716e | 418 | |
063c3378 PL |
419 | retry: |
420 | if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, | |
421 | 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 422 | return -ENOMEM; |
063c3378 | 423 | } |
1dde716e | 424 | |
063c3378 PL |
425 | while (!iTask.complete) { |
426 | iscsi_set_events(iscsilun); | |
427 | qemu_coroutine_yield(); | |
428 | } | |
1dde716e | 429 | |
063c3378 PL |
430 | if (iTask.task != NULL) { |
431 | scsi_free_scsi_task(iTask.task); | |
432 | iTask.task = NULL; | |
c589b249 RS |
433 | } |
434 | ||
063c3378 PL |
435 | if (iTask.do_retry) { |
436 | goto retry; | |
437 | } | |
c589b249 | 438 | |
063c3378 PL |
439 | if (iTask.status != SCSI_STATUS_GOOD) { |
440 | return -EIO; | |
441 | } | |
442 | ||
443 | return 0; | |
c589b249 RS |
444 | } |
445 | ||
98392453 RS |
446 | #ifdef __linux__ |
447 | static void | |
448 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
449 | void *command_data, void *opaque) | |
450 | { | |
451 | IscsiAIOCB *acb = opaque; | |
452 | ||
0a53f010 RS |
453 | g_free(acb->buf); |
454 | acb->buf = NULL; | |
455 | ||
b2090919 | 456 | if (acb->canceled != 0) { |
98392453 RS |
457 | return; |
458 | } | |
459 | ||
460 | acb->status = 0; | |
461 | if (status < 0) { | |
462 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
463 | iscsi_get_error(iscsi)); | |
464 | acb->status = -EIO; | |
465 | } | |
466 | ||
467 | acb->ioh->driver_status = 0; | |
468 | acb->ioh->host_status = 0; | |
469 | acb->ioh->resid = 0; | |
470 | ||
471 | #define SG_ERR_DRIVER_SENSE 0x08 | |
472 | ||
473 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
474 | int ss; | |
475 | ||
476 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
477 | ||
478 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
479 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
480 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
481 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
482 | } | |
483 | ||
cfb3f506 | 484 | iscsi_schedule_bh(acb); |
98392453 RS |
485 | } |
486 | ||
487 | static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, | |
488 | unsigned long int req, void *buf, | |
489 | BlockDriverCompletionFunc *cb, void *opaque) | |
490 | { | |
491 | IscsiLun *iscsilun = bs->opaque; | |
492 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
493 | struct iscsi_data data; | |
494 | IscsiAIOCB *acb; | |
495 | ||
496 | assert(req == SG_IO); | |
497 | ||
d7331bed | 498 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
499 | |
500 | acb->iscsilun = iscsilun; | |
501 | acb->canceled = 0; | |
1bd075f2 PB |
502 | acb->bh = NULL; |
503 | acb->status = -EINPROGRESS; | |
98392453 RS |
504 | acb->buf = NULL; |
505 | acb->ioh = buf; | |
506 | ||
507 | acb->task = malloc(sizeof(struct scsi_task)); | |
508 | if (acb->task == NULL) { | |
509 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
510 | iscsi_get_error(iscsi)); | |
511 | qemu_aio_release(acb); | |
512 | return NULL; | |
513 | } | |
514 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
515 | ||
516 | switch (acb->ioh->dxfer_direction) { | |
517 | case SG_DXFER_TO_DEV: | |
518 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
519 | break; | |
520 | case SG_DXFER_FROM_DEV: | |
521 | acb->task->xfer_dir = SCSI_XFER_READ; | |
522 | break; | |
523 | default: | |
524 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
525 | break; | |
526 | } | |
527 | ||
528 | acb->task->cdb_size = acb->ioh->cmd_len; | |
529 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
530 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
531 | ||
0a53f010 | 532 | data.size = 0; |
98392453 | 533 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
534 | if (acb->ioh->iovec_count == 0) { |
535 | data.data = acb->ioh->dxferp; | |
536 | data.size = acb->ioh->dxfer_len; | |
537 | } else { | |
538 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
539 | scsi_task_set_iov_out(acb->task, | |
540 | (struct scsi_iovec *) acb->ioh->dxferp, | |
541 | acb->ioh->iovec_count); | |
542 | #else | |
543 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
544 | ||
545 | acb->buf = g_malloc(acb->ioh->dxfer_len); | |
546 | data.data = acb->buf; | |
547 | data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0, | |
548 | acb->buf, acb->ioh->dxfer_len); | |
549 | #endif | |
550 | } | |
98392453 | 551 | } |
0a53f010 | 552 | |
98392453 RS |
553 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
554 | iscsi_aio_ioctl_cb, | |
0a53f010 | 555 | (data.size > 0) ? &data : NULL, |
98392453 RS |
556 | acb) != 0) { |
557 | scsi_free_scsi_task(acb->task); | |
558 | qemu_aio_release(acb); | |
559 | return NULL; | |
560 | } | |
561 | ||
562 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
563 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
564 | if (acb->ioh->iovec_count == 0) { |
565 | scsi_task_add_data_in_buffer(acb->task, | |
566 | acb->ioh->dxfer_len, | |
567 | acb->ioh->dxferp); | |
568 | } else { | |
569 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
570 | scsi_task_set_iov_in(acb->task, | |
571 | (struct scsi_iovec *) acb->ioh->dxferp, | |
572 | acb->ioh->iovec_count); | |
573 | #else | |
574 | int i; | |
575 | for (i = 0; i < acb->ioh->iovec_count; i++) { | |
576 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
577 | ||
578 | scsi_task_add_data_in_buffer(acb->task, | |
579 | iov[i].iov_len, | |
580 | iov[i].iov_base); | |
581 | } | |
582 | #endif | |
583 | } | |
98392453 RS |
584 | } |
585 | ||
586 | iscsi_set_events(iscsilun); | |
587 | ||
588 | return &acb->common; | |
589 | } | |
590 | ||
f1a12821 RS |
591 | |
592 | static void ioctl_cb(void *opaque, int status) | |
593 | { | |
594 | int *p_status = opaque; | |
595 | *p_status = status; | |
596 | } | |
597 | ||
98392453 RS |
598 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
599 | { | |
600 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 601 | int status; |
98392453 RS |
602 | |
603 | switch (req) { | |
604 | case SG_GET_VERSION_NUM: | |
605 | *(int *)buf = 30000; | |
606 | break; | |
607 | case SG_GET_SCSI_ID: | |
608 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
609 | break; | |
f1a12821 RS |
610 | case SG_IO: |
611 | status = -EINPROGRESS; | |
612 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
613 | ||
614 | while (status == -EINPROGRESS) { | |
615 | qemu_aio_wait(); | |
616 | } | |
617 | ||
618 | return 0; | |
98392453 RS |
619 | default: |
620 | return -1; | |
621 | } | |
622 | return 0; | |
623 | } | |
624 | #endif | |
625 | ||
c589b249 RS |
626 | static int64_t |
627 | iscsi_getlength(BlockDriverState *bs) | |
628 | { | |
629 | IscsiLun *iscsilun = bs->opaque; | |
630 | int64_t len; | |
631 | ||
632 | len = iscsilun->num_blocks; | |
633 | len *= iscsilun->block_size; | |
634 | ||
635 | return len; | |
636 | } | |
637 | ||
24c7608a | 638 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
f35c934a | 639 | |
54a5c1d5 PL |
640 | static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, |
641 | int64_t sector_num, | |
642 | int nb_sectors, int *pnum) | |
643 | { | |
644 | IscsiLun *iscsilun = bs->opaque; | |
645 | struct scsi_get_lba_status *lbas = NULL; | |
646 | struct scsi_lba_status_descriptor *lbasd = NULL; | |
647 | struct IscsiTask iTask; | |
648 | int64_t ret; | |
649 | ||
650 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
651 | ||
652 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
653 | ret = -EINVAL; | |
654 | goto out; | |
655 | } | |
656 | ||
657 | /* default to all sectors allocated */ | |
658 | ret = BDRV_BLOCK_DATA; | |
659 | ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; | |
660 | *pnum = nb_sectors; | |
661 | ||
662 | /* LUN does not support logical block provisioning */ | |
663 | if (iscsilun->lbpme == 0) { | |
664 | goto out; | |
665 | } | |
666 | ||
667 | retry: | |
668 | if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun, | |
669 | sector_qemu2lun(sector_num, iscsilun), | |
670 | 8 + 16, iscsi_co_generic_cb, | |
671 | &iTask) == NULL) { | |
92397116 | 672 | ret = -ENOMEM; |
54a5c1d5 PL |
673 | goto out; |
674 | } | |
675 | ||
676 | while (!iTask.complete) { | |
677 | iscsi_set_events(iscsilun); | |
678 | qemu_coroutine_yield(); | |
679 | } | |
680 | ||
681 | if (iTask.do_retry) { | |
682 | if (iTask.task != NULL) { | |
683 | scsi_free_scsi_task(iTask.task); | |
684 | iTask.task = NULL; | |
685 | } | |
686 | goto retry; | |
687 | } | |
688 | ||
689 | if (iTask.status != SCSI_STATUS_GOOD) { | |
690 | /* in case the get_lba_status_callout fails (i.e. | |
691 | * because the device is busy or the cmd is not | |
692 | * supported) we pretend all blocks are allocated | |
73f395fa | 693 | * for backwards compatibility */ |
54a5c1d5 PL |
694 | goto out; |
695 | } | |
696 | ||
697 | lbas = scsi_datain_unmarshall(iTask.task); | |
698 | if (lbas == NULL) { | |
699 | ret = -EIO; | |
700 | goto out; | |
701 | } | |
702 | ||
703 | lbasd = &lbas->descriptors[0]; | |
704 | ||
705 | if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) { | |
706 | ret = -EIO; | |
707 | goto out; | |
708 | } | |
709 | ||
710 | *pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); | |
711 | if (*pnum > nb_sectors) { | |
712 | *pnum = nb_sectors; | |
713 | } | |
714 | ||
715 | if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED || | |
716 | lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { | |
717 | ret &= ~BDRV_BLOCK_DATA; | |
718 | if (iscsilun->lbprz) { | |
719 | ret |= BDRV_BLOCK_ZERO; | |
720 | } | |
721 | } | |
722 | ||
723 | out: | |
724 | if (iTask.task != NULL) { | |
725 | scsi_free_scsi_task(iTask.task); | |
726 | } | |
727 | return ret; | |
728 | } | |
729 | ||
24c7608a | 730 | #endif /* LIBISCSI_FEATURE_IOVECTOR */ |
f35c934a | 731 | |
65f3e339 PL |
732 | static int |
733 | coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, | |
734 | int nb_sectors) | |
735 | { | |
736 | IscsiLun *iscsilun = bs->opaque; | |
737 | struct IscsiTask iTask; | |
738 | struct unmap_list list; | |
65f3e339 PL |
739 | |
740 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
741 | return -EINVAL; | |
742 | } | |
743 | ||
744 | if (!iscsilun->lbp.lbpu) { | |
745 | /* UNMAP is not supported by the target */ | |
746 | return 0; | |
747 | } | |
748 | ||
749 | list.lba = sector_qemu2lun(sector_num, iscsilun); | |
01a6a238 | 750 | list.num = sector_qemu2lun(nb_sectors, iscsilun); |
65f3e339 | 751 | |
01a6a238 | 752 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
65f3e339 | 753 | retry: |
01a6a238 PL |
754 | if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
755 | iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 756 | return -ENOMEM; |
01a6a238 | 757 | } |
65f3e339 | 758 | |
01a6a238 PL |
759 | while (!iTask.complete) { |
760 | iscsi_set_events(iscsilun); | |
761 | qemu_coroutine_yield(); | |
762 | } | |
65f3e339 | 763 | |
01a6a238 PL |
764 | if (iTask.task != NULL) { |
765 | scsi_free_scsi_task(iTask.task); | |
766 | iTask.task = NULL; | |
767 | } | |
65f3e339 | 768 | |
01a6a238 PL |
769 | if (iTask.do_retry) { |
770 | goto retry; | |
771 | } | |
65f3e339 | 772 | |
01a6a238 PL |
773 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION) { |
774 | /* the target might fail with a check condition if it | |
775 | is not happy with the alignment of the UNMAP request | |
776 | we silently fail in this case */ | |
777 | return 0; | |
778 | } | |
65f3e339 | 779 | |
01a6a238 PL |
780 | if (iTask.status != SCSI_STATUS_GOOD) { |
781 | return -EIO; | |
65f3e339 PL |
782 | } |
783 | ||
784 | return 0; | |
785 | } | |
786 | ||
d4cd9615 PL |
787 | #if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED) |
788 | ||
789 | static int | |
790 | coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, | |
791 | int nb_sectors, BdrvRequestFlags flags) | |
792 | { | |
793 | IscsiLun *iscsilun = bs->opaque; | |
794 | struct IscsiTask iTask; | |
795 | uint64_t lba; | |
796 | uint32_t nb_blocks; | |
797 | ||
798 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
799 | return -EINVAL; | |
800 | } | |
801 | ||
fa6252b0 PB |
802 | if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) { |
803 | /* WRITE SAME without UNMAP is not supported by the target */ | |
804 | return -ENOTSUP; | |
805 | } | |
806 | ||
807 | if ((flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->lbp.lbpws) { | |
808 | /* WRITE SAME with UNMAP is not supported by the target */ | |
d4cd9615 PL |
809 | return -ENOTSUP; |
810 | } | |
811 | ||
812 | lba = sector_qemu2lun(sector_num, iscsilun); | |
813 | nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); | |
814 | ||
815 | if (iscsilun->zeroblock == NULL) { | |
816 | iscsilun->zeroblock = g_malloc0(iscsilun->block_size); | |
817 | } | |
818 | ||
819 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
820 | retry: | |
821 | if (iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
822 | iscsilun->zeroblock, iscsilun->block_size, | |
823 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
824 | 0, 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 825 | return -ENOMEM; |
d4cd9615 PL |
826 | } |
827 | ||
828 | while (!iTask.complete) { | |
829 | iscsi_set_events(iscsilun); | |
830 | qemu_coroutine_yield(); | |
831 | } | |
832 | ||
833 | if (iTask.task != NULL) { | |
834 | scsi_free_scsi_task(iTask.task); | |
835 | iTask.task = NULL; | |
836 | } | |
837 | ||
838 | if (iTask.do_retry) { | |
839 | goto retry; | |
840 | } | |
841 | ||
842 | if (iTask.status != SCSI_STATUS_GOOD) { | |
fa6252b0 PB |
843 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION && |
844 | iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && | |
845 | iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE) { | |
846 | /* WRITE SAME is not supported by the target */ | |
847 | iscsilun->has_write_same = false; | |
848 | return -ENOTSUP; | |
849 | } | |
850 | ||
d4cd9615 PL |
851 | return -EIO; |
852 | } | |
853 | ||
854 | return 0; | |
855 | } | |
856 | ||
857 | #endif /* SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED */ | |
858 | ||
f9dadc98 RS |
859 | static int parse_chap(struct iscsi_context *iscsi, const char *target) |
860 | { | |
861 | QemuOptsList *list; | |
862 | QemuOpts *opts; | |
863 | const char *user = NULL; | |
864 | const char *password = NULL; | |
865 | ||
866 | list = qemu_find_opts("iscsi"); | |
867 | if (!list) { | |
868 | return 0; | |
869 | } | |
870 | ||
871 | opts = qemu_opts_find(list, target); | |
872 | if (opts == NULL) { | |
873 | opts = QTAILQ_FIRST(&list->head); | |
874 | if (!opts) { | |
875 | return 0; | |
876 | } | |
877 | } | |
878 | ||
879 | user = qemu_opt_get(opts, "user"); | |
880 | if (!user) { | |
881 | return 0; | |
882 | } | |
883 | ||
884 | password = qemu_opt_get(opts, "password"); | |
885 | if (!password) { | |
886 | error_report("CHAP username specified but no password was given"); | |
887 | return -1; | |
888 | } | |
889 | ||
890 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
891 | error_report("Failed to set initiator username and password"); | |
892 | return -1; | |
893 | } | |
894 | ||
895 | return 0; | |
896 | } | |
897 | ||
898 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target) | |
899 | { | |
900 | QemuOptsList *list; | |
901 | QemuOpts *opts; | |
902 | const char *digest = NULL; | |
903 | ||
904 | list = qemu_find_opts("iscsi"); | |
905 | if (!list) { | |
906 | return; | |
907 | } | |
908 | ||
909 | opts = qemu_opts_find(list, target); | |
910 | if (opts == NULL) { | |
911 | opts = QTAILQ_FIRST(&list->head); | |
912 | if (!opts) { | |
913 | return; | |
914 | } | |
915 | } | |
916 | ||
917 | digest = qemu_opt_get(opts, "header-digest"); | |
918 | if (!digest) { | |
919 | return; | |
920 | } | |
921 | ||
922 | if (!strcmp(digest, "CRC32C")) { | |
923 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
924 | } else if (!strcmp(digest, "NONE")) { | |
925 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
926 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
927 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
928 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
929 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
930 | } else { | |
931 | error_report("Invalid header-digest setting : %s", digest); | |
932 | } | |
933 | } | |
934 | ||
935 | static char *parse_initiator_name(const char *target) | |
936 | { | |
937 | QemuOptsList *list; | |
938 | QemuOpts *opts; | |
5accc840 PB |
939 | const char *name; |
940 | char *iscsi_name; | |
941 | UuidInfo *uuid_info; | |
f9dadc98 RS |
942 | |
943 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
944 | if (list) { |
945 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 946 | if (!opts) { |
f2ef4a6d PB |
947 | opts = QTAILQ_FIRST(&list->head); |
948 | } | |
949 | if (opts) { | |
950 | name = qemu_opt_get(opts, "initiator-name"); | |
5accc840 PB |
951 | if (name) { |
952 | return g_strdup(name); | |
953 | } | |
f9dadc98 RS |
954 | } |
955 | } | |
956 | ||
5accc840 PB |
957 | uuid_info = qmp_query_uuid(NULL); |
958 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
959 | name = qemu_get_vm_name(); | |
f2ef4a6d | 960 | } else { |
5accc840 | 961 | name = uuid_info->UUID; |
f9dadc98 | 962 | } |
5accc840 PB |
963 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
964 | name ? ":" : "", name ? name : ""); | |
965 | qapi_free_UuidInfo(uuid_info); | |
966 | return iscsi_name; | |
f9dadc98 RS |
967 | } |
968 | ||
5b5d34ec PL |
969 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
970 | static void iscsi_nop_timed_event(void *opaque) | |
971 | { | |
972 | IscsiLun *iscsilun = opaque; | |
973 | ||
974 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
975 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
976 | iscsi_reconnect(iscsilun->iscsi); | |
977 | } | |
978 | ||
979 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
980 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
981 | return; | |
982 | } | |
983 | ||
bc72ad67 | 984 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec PL |
985 | iscsi_set_events(iscsilun); |
986 | } | |
987 | #endif | |
988 | ||
cb1b83e7 PL |
989 | static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
990 | { | |
991 | struct scsi_task *task = NULL; | |
992 | struct scsi_readcapacity10 *rc10 = NULL; | |
993 | struct scsi_readcapacity16 *rc16 = NULL; | |
994 | int ret = 0; | |
995 | int retries = ISCSI_CMD_RETRIES; | |
996 | ||
1288844e PB |
997 | do { |
998 | if (task != NULL) { | |
999 | scsi_free_scsi_task(task); | |
1000 | task = NULL; | |
cb1b83e7 | 1001 | } |
1288844e PB |
1002 | |
1003 | switch (iscsilun->type) { | |
1004 | case TYPE_DISK: | |
1005 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
1006 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1007 | rc16 = scsi_datain_unmarshall(task); | |
1008 | if (rc16 == NULL) { | |
1009 | error_report("iSCSI: Failed to unmarshall readcapacity16 data."); | |
1010 | ret = -EINVAL; | |
1011 | } else { | |
1012 | iscsilun->block_size = rc16->block_length; | |
1013 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
f18a7cbb PL |
1014 | iscsilun->lbpme = rc16->lbpme; |
1015 | iscsilun->lbprz = rc16->lbprz; | |
1288844e PB |
1016 | } |
1017 | } | |
1018 | break; | |
1019 | case TYPE_ROM: | |
1020 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1021 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1022 | rc10 = scsi_datain_unmarshall(task); | |
1023 | if (rc10 == NULL) { | |
1024 | error_report("iSCSI: Failed to unmarshall readcapacity10 data."); | |
1025 | ret = -EINVAL; | |
1026 | } else { | |
1027 | iscsilun->block_size = rc10->block_size; | |
1028 | if (rc10->lba == 0) { | |
1029 | /* blank disk loaded */ | |
1030 | iscsilun->num_blocks = 0; | |
1031 | } else { | |
1032 | iscsilun->num_blocks = rc10->lba + 1; | |
1033 | } | |
1034 | } | |
1035 | } | |
1036 | break; | |
1037 | default: | |
1038 | return 0; | |
cb1b83e7 | 1039 | } |
1288844e PB |
1040 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1041 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1042 | && retries-- > 0); | |
cb1b83e7 | 1043 | |
1288844e PB |
1044 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1045 | error_report("iSCSI: failed to send readcapacity10 command."); | |
1046 | ret = -EINVAL; | |
1047 | } | |
cb1b83e7 PL |
1048 | if (task) { |
1049 | scsi_free_scsi_task(task); | |
1050 | } | |
cb1b83e7 PL |
1051 | return ret; |
1052 | } | |
1053 | ||
60beb341 KW |
1054 | /* TODO Convert to fine grained options */ |
1055 | static QemuOptsList runtime_opts = { | |
1056 | .name = "iscsi", | |
1057 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1058 | .desc = { | |
1059 | { | |
1060 | .name = "filename", | |
1061 | .type = QEMU_OPT_STRING, | |
1062 | .help = "URL to the iscsi image", | |
1063 | }, | |
1064 | { /* end of list */ } | |
1065 | }, | |
1066 | }; | |
1067 | ||
f18a7cbb PL |
1068 | static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, |
1069 | int lun, int evpd, int pc) { | |
1070 | int full_size; | |
1071 | struct scsi_task *task = NULL; | |
1072 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64); | |
1073 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1074 | goto fail; | |
1075 | } | |
1076 | full_size = scsi_datain_getfullsize(task); | |
1077 | if (full_size > task->datain.size) { | |
1078 | scsi_free_scsi_task(task); | |
1079 | ||
1080 | /* we need more data for the full list */ | |
1081 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); | |
1082 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1083 | goto fail; | |
1084 | } | |
1085 | } | |
1086 | ||
1087 | return task; | |
1088 | ||
1089 | fail: | |
1090 | error_report("iSCSI: Inquiry command failed : %s", | |
1091 | iscsi_get_error(iscsi)); | |
1092 | if (task) { | |
1093 | scsi_free_scsi_task(task); | |
1094 | return NULL; | |
1095 | } | |
1096 | return NULL; | |
1097 | } | |
1098 | ||
c589b249 RS |
1099 | /* |
1100 | * We support iscsi url's on the form | |
1101 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1102 | */ | |
015a1036 HR |
1103 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1104 | Error **errp) | |
c589b249 RS |
1105 | { |
1106 | IscsiLun *iscsilun = bs->opaque; | |
1107 | struct iscsi_context *iscsi = NULL; | |
1108 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1109 | struct scsi_task *task = NULL; |
1110 | struct scsi_inquiry_standard *inq = NULL; | |
f9dadc98 | 1111 | char *initiator_name = NULL; |
60beb341 KW |
1112 | QemuOpts *opts; |
1113 | Error *local_err = NULL; | |
1114 | const char *filename; | |
c589b249 RS |
1115 | int ret; |
1116 | ||
1117 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
1118 | error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. " | |
1119 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
1120 | "of 512", BDRV_SECTOR_SIZE); | |
1121 | return -EINVAL; | |
1122 | } | |
1123 | ||
87ea75d5 | 1124 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
60beb341 KW |
1125 | qemu_opts_absorb_qdict(opts, options, &local_err); |
1126 | if (error_is_set(&local_err)) { | |
1127 | qerror_report_err(local_err); | |
1128 | error_free(local_err); | |
1129 | ret = -EINVAL; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | filename = qemu_opt_get(opts, "filename"); | |
1134 | ||
1135 | ||
c589b249 RS |
1136 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1137 | if (iscsi_url == NULL) { | |
8da1e18b | 1138 | error_report("Failed to parse URL : %s", filename); |
c589b249 | 1139 | ret = -EINVAL; |
b93c94f7 | 1140 | goto out; |
c589b249 RS |
1141 | } |
1142 | ||
f9dadc98 RS |
1143 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1144 | ||
1145 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1146 | ||
1147 | iscsi = iscsi_create_context(initiator_name); | |
1148 | if (iscsi == NULL) { | |
1149 | error_report("iSCSI: Failed to create iSCSI context."); | |
1150 | ret = -ENOMEM; | |
b93c94f7 | 1151 | goto out; |
f9dadc98 RS |
1152 | } |
1153 | ||
c589b249 RS |
1154 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
1155 | error_report("iSCSI: Failed to set target name."); | |
1156 | ret = -EINVAL; | |
b93c94f7 | 1157 | goto out; |
c589b249 RS |
1158 | } |
1159 | ||
1160 | if (iscsi_url->user != NULL) { | |
1161 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
1162 | iscsi_url->passwd); | |
1163 | if (ret != 0) { | |
1164 | error_report("Failed to set initiator username and password"); | |
1165 | ret = -EINVAL; | |
b93c94f7 | 1166 | goto out; |
c589b249 RS |
1167 | } |
1168 | } | |
f9dadc98 RS |
1169 | |
1170 | /* check if we got CHAP username/password via the options */ | |
1171 | if (parse_chap(iscsi, iscsi_url->target) != 0) { | |
1172 | error_report("iSCSI: Failed to set CHAP user/password"); | |
1173 | ret = -EINVAL; | |
b93c94f7 | 1174 | goto out; |
f9dadc98 RS |
1175 | } |
1176 | ||
c589b249 RS |
1177 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1178 | error_report("iSCSI: Failed to set session type to normal."); | |
1179 | ret = -EINVAL; | |
b93c94f7 | 1180 | goto out; |
c589b249 RS |
1181 | } |
1182 | ||
1183 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1184 | ||
f9dadc98 RS |
1185 | /* check if we got HEADER_DIGEST via the options */ |
1186 | parse_header_digest(iscsi, iscsi_url->target); | |
1187 | ||
e829b0bb PL |
1188 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1189 | error_report("iSCSI: Failed to connect to LUN : %s", | |
1190 | iscsi_get_error(iscsi)); | |
1191 | ret = -EINVAL; | |
1192 | goto out; | |
1193 | } | |
c589b249 RS |
1194 | |
1195 | iscsilun->iscsi = iscsi; | |
1196 | iscsilun->lun = iscsi_url->lun; | |
1197 | ||
e829b0bb PL |
1198 | task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1199 | ||
1200 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1201 | error_report("iSCSI: failed to send inquiry command."); | |
c589b249 | 1202 | ret = -EINVAL; |
b93c94f7 | 1203 | goto out; |
c589b249 RS |
1204 | } |
1205 | ||
e829b0bb PL |
1206 | inq = scsi_datain_unmarshall(task); |
1207 | if (inq == NULL) { | |
1208 | error_report("iSCSI: Failed to unmarshall inquiry data."); | |
c589b249 | 1209 | ret = -EINVAL; |
b93c94f7 | 1210 | goto out; |
c589b249 | 1211 | } |
622695a4 | 1212 | |
e829b0bb | 1213 | iscsilun->type = inq->periperal_device_type; |
fa6252b0 | 1214 | iscsilun->has_write_same = true; |
e829b0bb | 1215 | |
cb1b83e7 PL |
1216 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1217 | goto out; | |
e829b0bb | 1218 | } |
0777b5dd | 1219 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
2c9880c4 | 1220 | bs->request_alignment = iscsilun->block_size; |
e829b0bb | 1221 | |
622695a4 RS |
1222 | /* Medium changer or tape. We dont have any emulation for this so this must |
1223 | * be sg ioctl compatible. We force it to be sg, otherwise qemu will try | |
1224 | * to read from the device to guess the image format. | |
1225 | */ | |
1226 | if (iscsilun->type == TYPE_MEDIUM_CHANGER || | |
1227 | iscsilun->type == TYPE_TAPE) { | |
1228 | bs->sg = 1; | |
1229 | } | |
1230 | ||
f18a7cbb PL |
1231 | if (iscsilun->lbpme) { |
1232 | struct scsi_inquiry_logical_block_provisioning *inq_lbp; | |
1233 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1234 | SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING); | |
1235 | if (task == NULL) { | |
1236 | ret = -EINVAL; | |
1237 | goto out; | |
1238 | } | |
1239 | inq_lbp = scsi_datain_unmarshall(task); | |
1240 | if (inq_lbp == NULL) { | |
1241 | error_report("iSCSI: failed to unmarshall inquiry datain blob"); | |
1242 | ret = -EINVAL; | |
1243 | goto out; | |
1244 | } | |
1245 | memcpy(&iscsilun->lbp, inq_lbp, | |
1246 | sizeof(struct scsi_inquiry_logical_block_provisioning)); | |
1247 | scsi_free_scsi_task(task); | |
1248 | task = NULL; | |
1249 | } | |
1250 | ||
1251 | if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) { | |
1252 | struct scsi_inquiry_block_limits *inq_bl; | |
1253 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1254 | SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS); | |
1255 | if (task == NULL) { | |
1256 | ret = -EINVAL; | |
1257 | goto out; | |
1258 | } | |
1259 | inq_bl = scsi_datain_unmarshall(task); | |
1260 | if (inq_bl == NULL) { | |
1261 | error_report("iSCSI: failed to unmarshall inquiry datain blob"); | |
1262 | ret = -EINVAL; | |
1263 | goto out; | |
1264 | } | |
1265 | memcpy(&iscsilun->bl, inq_bl, | |
1266 | sizeof(struct scsi_inquiry_block_limits)); | |
1267 | scsi_free_scsi_task(task); | |
1268 | task = NULL; | |
1269 | } | |
1270 | ||
5b5d34ec PL |
1271 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
1272 | /* Set up a timer for sending out iSCSI NOPs */ | |
bc72ad67 AB |
1273 | iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
1274 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
5b5d34ec PL |
1275 | #endif |
1276 | ||
b93c94f7 | 1277 | out: |
60beb341 | 1278 | qemu_opts_del(opts); |
f9dadc98 RS |
1279 | if (initiator_name != NULL) { |
1280 | g_free(initiator_name); | |
1281 | } | |
c589b249 RS |
1282 | if (iscsi_url != NULL) { |
1283 | iscsi_destroy_url(iscsi_url); | |
1284 | } | |
e829b0bb PL |
1285 | if (task != NULL) { |
1286 | scsi_free_scsi_task(task); | |
1287 | } | |
b93c94f7 PB |
1288 | |
1289 | if (ret) { | |
1290 | if (iscsi != NULL) { | |
1291 | iscsi_destroy_context(iscsi); | |
1292 | } | |
1293 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1294 | } |
c589b249 RS |
1295 | return ret; |
1296 | } | |
1297 | ||
1298 | static void iscsi_close(BlockDriverState *bs) | |
1299 | { | |
1300 | IscsiLun *iscsilun = bs->opaque; | |
1301 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1302 | ||
5b5d34ec | 1303 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1304 | timer_del(iscsilun->nop_timer); |
1305 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1306 | } |
f2e5dca4 | 1307 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
c589b249 | 1308 | iscsi_destroy_context(iscsi); |
d4cd9615 | 1309 | g_free(iscsilun->zeroblock); |
c589b249 RS |
1310 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1311 | } | |
1312 | ||
d34682cd KW |
1313 | static int iscsi_refresh_limits(BlockDriverState *bs) |
1314 | { | |
1315 | IscsiLun *iscsilun = bs->opaque; | |
1316 | ||
1317 | /* We don't actually refresh here, but just return data queried in | |
1318 | * iscsi_open(): iscsi targets don't change their limits. */ | |
1319 | if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) { | |
1320 | if (iscsilun->bl.max_unmap < 0xffffffff) { | |
1321 | bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, | |
1322 | iscsilun); | |
1323 | } | |
1324 | bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, | |
1325 | iscsilun); | |
1326 | ||
1327 | if (iscsilun->bl.max_ws_len < 0xffffffff) { | |
1328 | bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, | |
1329 | iscsilun); | |
1330 | } | |
1331 | bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, | |
1332 | iscsilun); | |
1333 | ||
1334 | bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len, | |
1335 | iscsilun); | |
1336 | } | |
1337 | ||
1338 | return 0; | |
1339 | } | |
1340 | ||
cb1b83e7 PL |
1341 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1342 | { | |
1343 | IscsiLun *iscsilun = bs->opaque; | |
1344 | int ret = 0; | |
1345 | ||
1346 | if (iscsilun->type != TYPE_DISK) { | |
1347 | return -ENOTSUP; | |
1348 | } | |
1349 | ||
1350 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { | |
1351 | return ret; | |
1352 | } | |
1353 | ||
1354 | if (offset > iscsi_getlength(bs)) { | |
1355 | return -EINVAL; | |
1356 | } | |
1357 | ||
1358 | return 0; | |
1359 | } | |
1360 | ||
d5124c00 HR |
1361 | static int iscsi_create(const char *filename, QEMUOptionParameter *options, |
1362 | Error **errp) | |
de8864e5 PL |
1363 | { |
1364 | int ret = 0; | |
1365 | int64_t total_size = 0; | |
13c91cb7 | 1366 | BlockDriverState *bs; |
de8864e5 | 1367 | IscsiLun *iscsilun = NULL; |
60beb341 | 1368 | QDict *bs_options; |
de8864e5 | 1369 | |
13c91cb7 | 1370 | bs = bdrv_new(""); |
de8864e5 PL |
1371 | |
1372 | /* Read out options */ | |
1373 | while (options && options->name) { | |
1374 | if (!strcmp(options->name, "size")) { | |
1375 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
1376 | } | |
1377 | options++; | |
1378 | } | |
1379 | ||
13c91cb7 FZ |
1380 | bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
1381 | iscsilun = bs->opaque; | |
de8864e5 | 1382 | |
60beb341 KW |
1383 | bs_options = qdict_new(); |
1384 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
015a1036 | 1385 | ret = iscsi_open(bs, bs_options, 0, NULL); |
60beb341 KW |
1386 | QDECREF(bs_options); |
1387 | ||
de8864e5 PL |
1388 | if (ret != 0) { |
1389 | goto out; | |
1390 | } | |
5b5d34ec | 1391 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1392 | timer_del(iscsilun->nop_timer); |
1393 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1394 | } |
de8864e5 PL |
1395 | if (iscsilun->type != TYPE_DISK) { |
1396 | ret = -ENODEV; | |
1397 | goto out; | |
1398 | } | |
13c91cb7 | 1399 | if (bs->total_sectors < total_size) { |
de8864e5 | 1400 | ret = -ENOSPC; |
d3bda7bc | 1401 | goto out; |
de8864e5 PL |
1402 | } |
1403 | ||
1404 | ret = 0; | |
1405 | out: | |
1406 | if (iscsilun->iscsi != NULL) { | |
1407 | iscsi_destroy_context(iscsilun->iscsi); | |
1408 | } | |
13c91cb7 FZ |
1409 | g_free(bs->opaque); |
1410 | bs->opaque = NULL; | |
4f6fd349 | 1411 | bdrv_unref(bs); |
de8864e5 PL |
1412 | return ret; |
1413 | } | |
1414 | ||
186d4f2b PL |
1415 | static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1416 | { | |
1417 | IscsiLun *iscsilun = bs->opaque; | |
1418 | bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz; | |
1419 | bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; | |
1c0704a5 PL |
1420 | /* Guess the internal cluster (page) size of the iscsi target by the means |
1421 | * of opt_unmap_gran. Transfer the unmap granularity only if it has a | |
1422 | * reasonable size for bdi->cluster_size */ | |
1423 | if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 64 * 1024 && | |
1424 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { | |
1425 | bdi->cluster_size = iscsilun->bl.opt_unmap_gran * iscsilun->block_size; | |
1426 | } | |
186d4f2b PL |
1427 | return 0; |
1428 | } | |
1429 | ||
de8864e5 PL |
1430 | static QEMUOptionParameter iscsi_create_options[] = { |
1431 | { | |
1432 | .name = BLOCK_OPT_SIZE, | |
1433 | .type = OPT_SIZE, | |
1434 | .help = "Virtual disk size" | |
1435 | }, | |
1436 | { NULL } | |
1437 | }; | |
1438 | ||
c589b249 RS |
1439 | static BlockDriver bdrv_iscsi = { |
1440 | .format_name = "iscsi", | |
1441 | .protocol_name = "iscsi", | |
1442 | ||
1443 | .instance_size = sizeof(IscsiLun), | |
030be321 | 1444 | .bdrv_needs_filename = true, |
c589b249 RS |
1445 | .bdrv_file_open = iscsi_open, |
1446 | .bdrv_close = iscsi_close, | |
de8864e5 PL |
1447 | .bdrv_create = iscsi_create, |
1448 | .create_options = iscsi_create_options, | |
c589b249 RS |
1449 | |
1450 | .bdrv_getlength = iscsi_getlength, | |
186d4f2b | 1451 | .bdrv_get_info = iscsi_get_info, |
cb1b83e7 | 1452 | .bdrv_truncate = iscsi_truncate, |
d34682cd | 1453 | .bdrv_refresh_limits = iscsi_refresh_limits, |
c589b249 | 1454 | |
24c7608a | 1455 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
54a5c1d5 | 1456 | .bdrv_co_get_block_status = iscsi_co_get_block_status, |
f35c934a | 1457 | #endif |
65f3e339 | 1458 | .bdrv_co_discard = iscsi_co_discard, |
d4cd9615 PL |
1459 | #if defined(SCSI_SENSE_ASCQ_CAPACITY_DATA_HAS_CHANGED) |
1460 | .bdrv_co_write_zeroes = iscsi_co_write_zeroes, | |
1461 | #endif | |
063c3378 PL |
1462 | .bdrv_co_readv = iscsi_co_readv, |
1463 | .bdrv_co_writev = iscsi_co_writev, | |
1464 | .bdrv_co_flush_to_disk = iscsi_co_flush, | |
fa6acb0c | 1465 | |
98392453 RS |
1466 | #ifdef __linux__ |
1467 | .bdrv_ioctl = iscsi_ioctl, | |
1468 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1469 | #endif | |
c589b249 RS |
1470 | }; |
1471 | ||
4d454574 PB |
1472 | static QemuOptsList qemu_iscsi_opts = { |
1473 | .name = "iscsi", | |
1474 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1475 | .desc = { | |
1476 | { | |
1477 | .name = "user", | |
1478 | .type = QEMU_OPT_STRING, | |
1479 | .help = "username for CHAP authentication to target", | |
1480 | },{ | |
1481 | .name = "password", | |
1482 | .type = QEMU_OPT_STRING, | |
1483 | .help = "password for CHAP authentication to target", | |
1484 | },{ | |
1485 | .name = "header-digest", | |
1486 | .type = QEMU_OPT_STRING, | |
1487 | .help = "HeaderDigest setting. " | |
1488 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1489 | },{ | |
1490 | .name = "initiator-name", | |
1491 | .type = QEMU_OPT_STRING, | |
1492 | .help = "Initiator iqn name to use when connecting", | |
1493 | }, | |
1494 | { /* end of list */ } | |
1495 | }, | |
1496 | }; | |
1497 | ||
c589b249 RS |
1498 | static void iscsi_block_init(void) |
1499 | { | |
1500 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1501 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1502 | } |
1503 | ||
1504 | block_init(iscsi_block_init); |