]>
Commit | Line | Data |
---|---|---|
c589b249 RS |
1 | /* |
2 | * QEMU Block driver for iSCSI images | |
3 | * | |
4 | * Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
ec209aca | 5 | * Copyright (c) 2012-2014 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> | |
efc6de0d | 29 | #include <math.h> |
f4dfa67f | 30 | #include <arpa/inet.h> |
c589b249 | 31 | #include "qemu-common.h" |
1de7afc9 PB |
32 | #include "qemu/config-file.h" |
33 | #include "qemu/error-report.h" | |
b03c3805 PL |
34 | #include "qemu/bitops.h" |
35 | #include "qemu/bitmap.h" | |
737e150e | 36 | #include "block/block_int.h" |
0d09e41a | 37 | #include "block/scsi.h" |
0a53f010 | 38 | #include "qemu/iov.h" |
5accc840 PB |
39 | #include "sysemu/sysemu.h" |
40 | #include "qmp-commands.h" | |
c589b249 RS |
41 | |
42 | #include <iscsi/iscsi.h> | |
43 | #include <iscsi/scsi-lowlevel.h> | |
44 | ||
98392453 RS |
45 | #ifdef __linux__ |
46 | #include <scsi/sg.h> | |
0d09e41a | 47 | #include <block/scsi.h> |
98392453 | 48 | #endif |
c589b249 RS |
49 | |
50 | typedef struct IscsiLun { | |
51 | struct iscsi_context *iscsi; | |
80cf6257 | 52 | AioContext *aio_context; |
c589b249 | 53 | int lun; |
dbfff6d7 | 54 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 55 | int block_size; |
c7b4a952 | 56 | uint64_t num_blocks; |
c9b9f682 | 57 | int events; |
5b5d34ec | 58 | QEMUTimer *nop_timer; |
f18a7cbb PL |
59 | uint8_t lbpme; |
60 | uint8_t lbprz; | |
fa6252b0 | 61 | uint8_t has_write_same; |
f18a7cbb PL |
62 | struct scsi_inquiry_logical_block_provisioning lbp; |
63 | struct scsi_inquiry_block_limits bl; | |
d4cd9615 | 64 | unsigned char *zeroblock; |
b03c3805 PL |
65 | unsigned long *allocationmap; |
66 | int cluster_sectors; | |
9281fe9e | 67 | bool use_16_for_rw; |
c589b249 RS |
68 | } IscsiLun; |
69 | ||
54a5c1d5 PL |
70 | typedef struct IscsiTask { |
71 | int status; | |
72 | int complete; | |
73 | int retries; | |
74 | int do_retry; | |
75 | struct scsi_task *task; | |
76 | Coroutine *co; | |
8b9dfe90 | 77 | QEMUBH *bh; |
80cf6257 | 78 | IscsiLun *iscsilun; |
efc6de0d | 79 | QEMUTimer retry_timer; |
54a5c1d5 PL |
80 | } IscsiTask; |
81 | ||
c589b249 | 82 | typedef struct IscsiAIOCB { |
7c84b1b8 | 83 | BlockAIOCB common; |
c589b249 RS |
84 | QEMUIOVector *qiov; |
85 | QEMUBH *bh; | |
86 | IscsiLun *iscsilun; | |
87 | struct scsi_task *task; | |
88 | uint8_t *buf; | |
89 | int status; | |
1dde716e PL |
90 | int64_t sector_num; |
91 | int nb_sectors; | |
98392453 RS |
92 | #ifdef __linux__ |
93 | sg_io_hdr_t *ioh; | |
94 | #endif | |
c589b249 RS |
95 | } IscsiAIOCB; |
96 | ||
5b5d34ec PL |
97 | #define NOP_INTERVAL 5000 |
98 | #define MAX_NOP_FAILURES 3 | |
efc6de0d PL |
99 | #define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times) |
100 | static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048}; | |
5b5d34ec | 101 | |
5d831be2 | 102 | /* this threshold is a trade-off knob to choose between |
5917af81 PL |
103 | * the potential additional overhead of an extra GET_LBA_STATUS request |
104 | * vs. unnecessarily reading a lot of zero sectors over the wire. | |
105 | * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES | |
106 | * sectors we check the allocation status of the area covered by the | |
107 | * request first if the allocationmap indicates that the area might be | |
108 | * unallocated. */ | |
109 | #define ISCSI_CHECKALLOC_THRES 64 | |
5b5d34ec | 110 | |
27cbd828 | 111 | static void |
cfb3f506 | 112 | iscsi_bh_cb(void *p) |
27cbd828 PB |
113 | { |
114 | IscsiAIOCB *acb = p; | |
115 | ||
116 | qemu_bh_delete(acb->bh); | |
117 | ||
4790b03d PB |
118 | g_free(acb->buf); |
119 | acb->buf = NULL; | |
120 | ||
722d9333 | 121 | acb->common.cb(acb->common.opaque, acb->status); |
27cbd828 | 122 | |
1bd075f2 PB |
123 | if (acb->task != NULL) { |
124 | scsi_free_scsi_task(acb->task); | |
125 | acb->task = NULL; | |
126 | } | |
127 | ||
8007429a | 128 | qemu_aio_unref(acb); |
27cbd828 PB |
129 | } |
130 | ||
cfb3f506 PB |
131 | static void |
132 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 133 | { |
1bd075f2 PB |
134 | if (acb->bh) { |
135 | return; | |
136 | } | |
80cf6257 | 137 | acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb); |
27cbd828 | 138 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
139 | } |
140 | ||
8b9dfe90 PL |
141 | static void iscsi_co_generic_bh_cb(void *opaque) |
142 | { | |
143 | struct IscsiTask *iTask = opaque; | |
fcd470d8 | 144 | iTask->complete = 1; |
8b9dfe90 PL |
145 | qemu_bh_delete(iTask->bh); |
146 | qemu_coroutine_enter(iTask->co, NULL); | |
147 | } | |
148 | ||
efc6de0d PL |
149 | static void iscsi_retry_timer_expired(void *opaque) |
150 | { | |
151 | struct IscsiTask *iTask = opaque; | |
fcd470d8 | 152 | iTask->complete = 1; |
efc6de0d PL |
153 | if (iTask->co) { |
154 | qemu_coroutine_enter(iTask->co, NULL); | |
155 | } | |
156 | } | |
157 | ||
158 | static inline unsigned exp_random(double mean) | |
159 | { | |
160 | return -mean * log((double)rand() / RAND_MAX); | |
161 | } | |
162 | ||
54a5c1d5 PL |
163 | static void |
164 | iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, | |
165 | void *command_data, void *opaque) | |
166 | { | |
167 | struct IscsiTask *iTask = opaque; | |
168 | struct scsi_task *task = command_data; | |
169 | ||
54a5c1d5 PL |
170 | iTask->status = status; |
171 | iTask->do_retry = 0; | |
172 | iTask->task = task; | |
173 | ||
54a5c1d5 | 174 | if (status != SCSI_STATUS_GOOD) { |
efc6de0d PL |
175 | if (iTask->retries++ < ISCSI_CMD_RETRIES) { |
176 | if (status == SCSI_STATUS_CHECK_CONDITION | |
177 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
178 | error_report("iSCSI CheckCondition: %s", | |
179 | iscsi_get_error(iscsi)); | |
180 | iTask->do_retry = 1; | |
181 | goto out; | |
182 | } | |
183 | if (status == SCSI_STATUS_BUSY) { | |
184 | unsigned retry_time = | |
185 | exp_random(iscsi_retry_times[iTask->retries - 1]); | |
186 | error_report("iSCSI Busy (retry #%u in %u ms): %s", | |
187 | iTask->retries, retry_time, | |
188 | iscsi_get_error(iscsi)); | |
189 | aio_timer_init(iTask->iscsilun->aio_context, | |
190 | &iTask->retry_timer, QEMU_CLOCK_REALTIME, | |
191 | SCALE_MS, iscsi_retry_timer_expired, iTask); | |
192 | timer_mod(&iTask->retry_timer, | |
193 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time); | |
194 | iTask->do_retry = 1; | |
195 | return; | |
196 | } | |
197 | } | |
837c3901 | 198 | error_report("iSCSI Failure: %s", iscsi_get_error(iscsi)); |
54a5c1d5 PL |
199 | } |
200 | ||
201 | out: | |
202 | if (iTask->co) { | |
80cf6257 SH |
203 | iTask->bh = aio_bh_new(iTask->iscsilun->aio_context, |
204 | iscsi_co_generic_bh_cb, iTask); | |
8b9dfe90 | 205 | qemu_bh_schedule(iTask->bh); |
fcd470d8 PL |
206 | } else { |
207 | iTask->complete = 1; | |
54a5c1d5 PL |
208 | } |
209 | } | |
210 | ||
211 | static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) | |
212 | { | |
213 | *iTask = (struct IscsiTask) { | |
efc6de0d | 214 | .co = qemu_coroutine_self(), |
efc6de0d | 215 | .iscsilun = iscsilun, |
54a5c1d5 PL |
216 | }; |
217 | } | |
27cbd828 | 218 | |
c589b249 RS |
219 | static void |
220 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
221 | void *private_data) | |
222 | { | |
1bd075f2 PB |
223 | IscsiAIOCB *acb = private_data; |
224 | ||
225 | acb->status = -ECANCELED; | |
226 | iscsi_schedule_bh(acb); | |
c589b249 RS |
227 | } |
228 | ||
229 | static void | |
7c84b1b8 | 230 | iscsi_aio_cancel(BlockAIOCB *blockacb) |
c589b249 RS |
231 | { |
232 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
233 | IscsiLun *iscsilun = acb->iscsilun; | |
234 | ||
1bd075f2 PB |
235 | if (acb->status != -EINPROGRESS) { |
236 | return; | |
237 | } | |
238 | ||
b2090919 | 239 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 240 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 241 | iscsi_abort_task_cb, acb); |
b2090919 | 242 | |
c589b249 RS |
243 | } |
244 | ||
d7331bed | 245 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 | 246 | .aiocb_size = sizeof(IscsiAIOCB), |
722d9333 | 247 | .cancel_async = iscsi_aio_cancel, |
c589b249 RS |
248 | }; |
249 | ||
250 | ||
251 | static void iscsi_process_read(void *arg); | |
252 | static void iscsi_process_write(void *arg); | |
253 | ||
c589b249 RS |
254 | static void |
255 | iscsi_set_events(IscsiLun *iscsilun) | |
256 | { | |
257 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
c9b9f682 RS |
258 | int ev; |
259 | ||
260 | /* We always register a read handler. */ | |
261 | ev = POLLIN; | |
262 | ev |= iscsi_which_events(iscsi); | |
263 | if (ev != iscsilun->events) { | |
80cf6257 SH |
264 | aio_set_fd_handler(iscsilun->aio_context, |
265 | iscsi_get_fd(iscsi), | |
266 | iscsi_process_read, | |
267 | (ev & POLLOUT) ? iscsi_process_write : NULL, | |
268 | iscsilun); | |
c9b9f682 RS |
269 | |
270 | } | |
271 | ||
c9b9f682 | 272 | iscsilun->events = ev; |
c589b249 RS |
273 | } |
274 | ||
275 | static void | |
276 | iscsi_process_read(void *arg) | |
277 | { | |
278 | IscsiLun *iscsilun = arg; | |
279 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
280 | ||
281 | iscsi_service(iscsi, POLLIN); | |
282 | iscsi_set_events(iscsilun); | |
283 | } | |
284 | ||
285 | static void | |
286 | iscsi_process_write(void *arg) | |
287 | { | |
288 | IscsiLun *iscsilun = arg; | |
289 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
290 | ||
291 | iscsi_service(iscsi, POLLOUT); | |
292 | iscsi_set_events(iscsilun); | |
293 | } | |
294 | ||
0777b5dd PL |
295 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
296 | { | |
297 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
298 | } | |
299 | ||
c589b249 RS |
300 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
301 | { | |
302 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
303 | } | |
304 | ||
91bea4e2 PL |
305 | static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
306 | IscsiLun *iscsilun) | |
307 | { | |
308 | if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size || | |
309 | (nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { | |
f5075224 RJ |
310 | error_report("iSCSI misaligned request: " |
311 | "iscsilun->block_size %u, sector_num %" PRIi64 | |
312 | ", nb_sectors %d", | |
91bea4e2 PL |
313 | iscsilun->block_size, sector_num, nb_sectors); |
314 | return 0; | |
315 | } | |
316 | return 1; | |
317 | } | |
318 | ||
a9fe4c95 PL |
319 | static unsigned long *iscsi_allocationmap_init(IscsiLun *iscsilun) |
320 | { | |
321 | return bitmap_try_new(DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks, | |
322 | iscsilun), | |
323 | iscsilun->cluster_sectors)); | |
324 | } | |
325 | ||
b03c3805 PL |
326 | static void iscsi_allocationmap_set(IscsiLun *iscsilun, int64_t sector_num, |
327 | int nb_sectors) | |
328 | { | |
329 | if (iscsilun->allocationmap == NULL) { | |
330 | return; | |
331 | } | |
332 | bitmap_set(iscsilun->allocationmap, | |
333 | sector_num / iscsilun->cluster_sectors, | |
334 | DIV_ROUND_UP(nb_sectors, iscsilun->cluster_sectors)); | |
335 | } | |
336 | ||
337 | static void iscsi_allocationmap_clear(IscsiLun *iscsilun, int64_t sector_num, | |
338 | int nb_sectors) | |
339 | { | |
340 | int64_t cluster_num, nb_clusters; | |
341 | if (iscsilun->allocationmap == NULL) { | |
342 | return; | |
343 | } | |
344 | cluster_num = DIV_ROUND_UP(sector_num, iscsilun->cluster_sectors); | |
345 | nb_clusters = (sector_num + nb_sectors) / iscsilun->cluster_sectors | |
346 | - cluster_num; | |
347 | if (nb_clusters > 0) { | |
348 | bitmap_clear(iscsilun->allocationmap, cluster_num, nb_clusters); | |
349 | } | |
350 | } | |
351 | ||
063c3378 PL |
352 | static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, |
353 | int64_t sector_num, int nb_sectors, | |
354 | QEMUIOVector *iov) | |
c589b249 | 355 | { |
063c3378 PL |
356 | IscsiLun *iscsilun = bs->opaque; |
357 | struct IscsiTask iTask; | |
f4dfa67f | 358 | uint64_t lba; |
063c3378 | 359 | uint32_t num_sectors; |
c589b249 | 360 | |
063c3378 PL |
361 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
362 | return -EINVAL; | |
363 | } | |
7371d56f | 364 | |
063c3378 PL |
365 | lba = sector_qemu2lun(sector_num, iscsilun); |
366 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
063c3378 PL |
367 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
368 | retry: | |
9281fe9e PL |
369 | if (iscsilun->use_16_for_rw) { |
370 | iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
8c215a9f | 371 | NULL, num_sectors * iscsilun->block_size, |
9281fe9e PL |
372 | iscsilun->block_size, 0, 0, 0, 0, 0, |
373 | iscsi_co_generic_cb, &iTask); | |
374 | } else { | |
375 | iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
8c215a9f | 376 | NULL, num_sectors * iscsilun->block_size, |
9281fe9e PL |
377 | iscsilun->block_size, 0, 0, 0, 0, 0, |
378 | iscsi_co_generic_cb, &iTask); | |
379 | } | |
063c3378 | 380 | if (iTask.task == NULL) { |
92397116 | 381 | return -ENOMEM; |
f4dfa67f | 382 | } |
063c3378 PL |
383 | scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, |
384 | iov->niov); | |
063c3378 PL |
385 | while (!iTask.complete) { |
386 | iscsi_set_events(iscsilun); | |
387 | qemu_coroutine_yield(); | |
c589b249 RS |
388 | } |
389 | ||
063c3378 PL |
390 | if (iTask.task != NULL) { |
391 | scsi_free_scsi_task(iTask.task); | |
392 | iTask.task = NULL; | |
91bea4e2 PL |
393 | } |
394 | ||
063c3378 | 395 | if (iTask.do_retry) { |
837c3901 | 396 | iTask.complete = 0; |
063c3378 | 397 | goto retry; |
1dde716e PL |
398 | } |
399 | ||
063c3378 PL |
400 | if (iTask.status != SCSI_STATUS_GOOD) { |
401 | return -EIO; | |
c589b249 RS |
402 | } |
403 | ||
b03c3805 PL |
404 | iscsi_allocationmap_set(iscsilun, sector_num, nb_sectors); |
405 | ||
063c3378 | 406 | return 0; |
c589b249 RS |
407 | } |
408 | ||
b03c3805 PL |
409 | |
410 | static bool iscsi_allocationmap_is_allocated(IscsiLun *iscsilun, | |
411 | int64_t sector_num, int nb_sectors) | |
412 | { | |
413 | unsigned long size; | |
414 | if (iscsilun->allocationmap == NULL) { | |
415 | return true; | |
416 | } | |
417 | size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors); | |
418 | return !(find_next_bit(iscsilun->allocationmap, size, | |
419 | sector_num / iscsilun->cluster_sectors) == size); | |
420 | } | |
421 | ||
b03c3805 PL |
422 | static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, |
423 | int64_t sector_num, | |
424 | int nb_sectors, int *pnum) | |
425 | { | |
426 | IscsiLun *iscsilun = bs->opaque; | |
427 | struct scsi_get_lba_status *lbas = NULL; | |
428 | struct scsi_lba_status_descriptor *lbasd = NULL; | |
429 | struct IscsiTask iTask; | |
430 | int64_t ret; | |
431 | ||
432 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
433 | ||
434 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
435 | ret = -EINVAL; | |
436 | goto out; | |
437 | } | |
438 | ||
439 | /* default to all sectors allocated */ | |
440 | ret = BDRV_BLOCK_DATA; | |
441 | ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; | |
442 | *pnum = nb_sectors; | |
443 | ||
444 | /* LUN does not support logical block provisioning */ | |
445 | if (iscsilun->lbpme == 0) { | |
446 | goto out; | |
447 | } | |
448 | ||
449 | retry: | |
450 | if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun, | |
451 | sector_qemu2lun(sector_num, iscsilun), | |
452 | 8 + 16, iscsi_co_generic_cb, | |
453 | &iTask) == NULL) { | |
454 | ret = -ENOMEM; | |
455 | goto out; | |
456 | } | |
457 | ||
458 | while (!iTask.complete) { | |
459 | iscsi_set_events(iscsilun); | |
460 | qemu_coroutine_yield(); | |
461 | } | |
462 | ||
463 | if (iTask.do_retry) { | |
464 | if (iTask.task != NULL) { | |
465 | scsi_free_scsi_task(iTask.task); | |
466 | iTask.task = NULL; | |
467 | } | |
468 | iTask.complete = 0; | |
469 | goto retry; | |
470 | } | |
471 | ||
472 | if (iTask.status != SCSI_STATUS_GOOD) { | |
473 | /* in case the get_lba_status_callout fails (i.e. | |
474 | * because the device is busy or the cmd is not | |
475 | * supported) we pretend all blocks are allocated | |
476 | * for backwards compatibility */ | |
477 | goto out; | |
478 | } | |
479 | ||
480 | lbas = scsi_datain_unmarshall(iTask.task); | |
481 | if (lbas == NULL) { | |
482 | ret = -EIO; | |
483 | goto out; | |
484 | } | |
485 | ||
486 | lbasd = &lbas->descriptors[0]; | |
487 | ||
488 | if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) { | |
489 | ret = -EIO; | |
490 | goto out; | |
491 | } | |
492 | ||
493 | *pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); | |
494 | ||
495 | if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED || | |
496 | lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { | |
497 | ret &= ~BDRV_BLOCK_DATA; | |
498 | if (iscsilun->lbprz) { | |
499 | ret |= BDRV_BLOCK_ZERO; | |
500 | } | |
501 | } | |
502 | ||
503 | if (ret & BDRV_BLOCK_ZERO) { | |
504 | iscsi_allocationmap_clear(iscsilun, sector_num, *pnum); | |
505 | } else { | |
506 | iscsi_allocationmap_set(iscsilun, sector_num, *pnum); | |
507 | } | |
508 | ||
509 | if (*pnum > nb_sectors) { | |
510 | *pnum = nb_sectors; | |
511 | } | |
512 | out: | |
513 | if (iTask.task != NULL) { | |
514 | scsi_free_scsi_task(iTask.task); | |
515 | } | |
516 | return ret; | |
517 | } | |
518 | ||
063c3378 PL |
519 | static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
520 | int64_t sector_num, int nb_sectors, | |
521 | QEMUIOVector *iov) | |
c589b249 | 522 | { |
063c3378 PL |
523 | IscsiLun *iscsilun = bs->opaque; |
524 | struct IscsiTask iTask; | |
1dde716e PL |
525 | uint64_t lba; |
526 | uint32_t num_sectors; | |
c589b249 | 527 | |
063c3378 PL |
528 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
529 | return -EINVAL; | |
f4dfa67f | 530 | } |
f4dfa67f | 531 | |
5917af81 | 532 | if (iscsilun->lbprz && nb_sectors >= ISCSI_CHECKALLOC_THRES && |
b03c3805 PL |
533 | !iscsi_allocationmap_is_allocated(iscsilun, sector_num, nb_sectors)) { |
534 | int64_t ret; | |
535 | int pnum; | |
536 | ret = iscsi_co_get_block_status(bs, sector_num, INT_MAX, &pnum); | |
537 | if (ret < 0) { | |
538 | return ret; | |
539 | } | |
540 | if (ret & BDRV_BLOCK_ZERO && pnum >= nb_sectors) { | |
541 | qemu_iovec_memset(iov, 0, 0x00, iov->size); | |
542 | return 0; | |
543 | } | |
544 | } | |
b03c3805 | 545 | |
063c3378 PL |
546 | lba = sector_qemu2lun(sector_num, iscsilun); |
547 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
f4dfa67f | 548 | |
063c3378 PL |
549 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
550 | retry: | |
9281fe9e | 551 | if (iscsilun->use_16_for_rw) { |
063c3378 PL |
552 | iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
553 | num_sectors * iscsilun->block_size, | |
554 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
555 | iscsi_co_generic_cb, &iTask); | |
9281fe9e | 556 | } else { |
063c3378 PL |
557 | iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
558 | num_sectors * iscsilun->block_size, | |
219c2521 | 559 | iscsilun->block_size, |
219c2521 | 560 | 0, 0, 0, 0, 0, |
063c3378 | 561 | iscsi_co_generic_cb, &iTask); |
f4dfa67f | 562 | } |
063c3378 | 563 | if (iTask.task == NULL) { |
92397116 | 564 | return -ENOMEM; |
c589b249 | 565 | } |
063c3378 | 566 | scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); |
91bea4e2 | 567 | |
063c3378 PL |
568 | while (!iTask.complete) { |
569 | iscsi_set_events(iscsilun); | |
570 | qemu_coroutine_yield(); | |
1dde716e | 571 | } |
c589b249 | 572 | |
063c3378 PL |
573 | if (iTask.task != NULL) { |
574 | scsi_free_scsi_task(iTask.task); | |
575 | iTask.task = NULL; | |
c589b249 RS |
576 | } |
577 | ||
063c3378 | 578 | if (iTask.do_retry) { |
837c3901 | 579 | iTask.complete = 0; |
063c3378 | 580 | goto retry; |
c589b249 RS |
581 | } |
582 | ||
063c3378 PL |
583 | if (iTask.status != SCSI_STATUS_GOOD) { |
584 | return -EIO; | |
1dde716e PL |
585 | } |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
063c3378 | 590 | static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
1dde716e PL |
591 | { |
592 | IscsiLun *iscsilun = bs->opaque; | |
063c3378 | 593 | struct IscsiTask iTask; |
1dde716e | 594 | |
b2f9c08a PB |
595 | if (bs->sg) { |
596 | return 0; | |
597 | } | |
598 | ||
063c3378 | 599 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
1dde716e | 600 | |
063c3378 PL |
601 | retry: |
602 | if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, | |
603 | 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 604 | return -ENOMEM; |
063c3378 | 605 | } |
1dde716e | 606 | |
063c3378 PL |
607 | while (!iTask.complete) { |
608 | iscsi_set_events(iscsilun); | |
609 | qemu_coroutine_yield(); | |
610 | } | |
1dde716e | 611 | |
063c3378 PL |
612 | if (iTask.task != NULL) { |
613 | scsi_free_scsi_task(iTask.task); | |
614 | iTask.task = NULL; | |
c589b249 RS |
615 | } |
616 | ||
063c3378 | 617 | if (iTask.do_retry) { |
837c3901 | 618 | iTask.complete = 0; |
063c3378 PL |
619 | goto retry; |
620 | } | |
c589b249 | 621 | |
063c3378 PL |
622 | if (iTask.status != SCSI_STATUS_GOOD) { |
623 | return -EIO; | |
624 | } | |
625 | ||
626 | return 0; | |
c589b249 RS |
627 | } |
628 | ||
98392453 RS |
629 | #ifdef __linux__ |
630 | static void | |
631 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
632 | void *command_data, void *opaque) | |
633 | { | |
634 | IscsiAIOCB *acb = opaque; | |
635 | ||
0a53f010 RS |
636 | g_free(acb->buf); |
637 | acb->buf = NULL; | |
638 | ||
98392453 RS |
639 | acb->status = 0; |
640 | if (status < 0) { | |
641 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
642 | iscsi_get_error(iscsi)); | |
643 | acb->status = -EIO; | |
644 | } | |
645 | ||
646 | acb->ioh->driver_status = 0; | |
647 | acb->ioh->host_status = 0; | |
648 | acb->ioh->resid = 0; | |
649 | ||
650 | #define SG_ERR_DRIVER_SENSE 0x08 | |
651 | ||
652 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
653 | int ss; | |
654 | ||
655 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
656 | ||
657 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
658 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
659 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
660 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
661 | } | |
662 | ||
cfb3f506 | 663 | iscsi_schedule_bh(acb); |
98392453 RS |
664 | } |
665 | ||
7c84b1b8 | 666 | static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, |
98392453 | 667 | unsigned long int req, void *buf, |
097310b5 | 668 | BlockCompletionFunc *cb, void *opaque) |
98392453 RS |
669 | { |
670 | IscsiLun *iscsilun = bs->opaque; | |
671 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
672 | struct iscsi_data data; | |
673 | IscsiAIOCB *acb; | |
674 | ||
675 | assert(req == SG_IO); | |
676 | ||
d7331bed | 677 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
678 | |
679 | acb->iscsilun = iscsilun; | |
1bd075f2 PB |
680 | acb->bh = NULL; |
681 | acb->status = -EINPROGRESS; | |
98392453 RS |
682 | acb->buf = NULL; |
683 | acb->ioh = buf; | |
684 | ||
685 | acb->task = malloc(sizeof(struct scsi_task)); | |
686 | if (acb->task == NULL) { | |
687 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
688 | iscsi_get_error(iscsi)); | |
8007429a | 689 | qemu_aio_unref(acb); |
98392453 RS |
690 | return NULL; |
691 | } | |
692 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
693 | ||
694 | switch (acb->ioh->dxfer_direction) { | |
695 | case SG_DXFER_TO_DEV: | |
696 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
697 | break; | |
698 | case SG_DXFER_FROM_DEV: | |
699 | acb->task->xfer_dir = SCSI_XFER_READ; | |
700 | break; | |
701 | default: | |
702 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
703 | break; | |
704 | } | |
705 | ||
706 | acb->task->cdb_size = acb->ioh->cmd_len; | |
707 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
708 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
709 | ||
0a53f010 | 710 | data.size = 0; |
98392453 | 711 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
712 | if (acb->ioh->iovec_count == 0) { |
713 | data.data = acb->ioh->dxferp; | |
714 | data.size = acb->ioh->dxfer_len; | |
715 | } else { | |
0a53f010 RS |
716 | scsi_task_set_iov_out(acb->task, |
717 | (struct scsi_iovec *) acb->ioh->dxferp, | |
718 | acb->ioh->iovec_count); | |
0a53f010 | 719 | } |
98392453 | 720 | } |
0a53f010 | 721 | |
98392453 RS |
722 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
723 | iscsi_aio_ioctl_cb, | |
0a53f010 | 724 | (data.size > 0) ? &data : NULL, |
98392453 RS |
725 | acb) != 0) { |
726 | scsi_free_scsi_task(acb->task); | |
8007429a | 727 | qemu_aio_unref(acb); |
98392453 RS |
728 | return NULL; |
729 | } | |
730 | ||
731 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
732 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
733 | if (acb->ioh->iovec_count == 0) { |
734 | scsi_task_add_data_in_buffer(acb->task, | |
735 | acb->ioh->dxfer_len, | |
736 | acb->ioh->dxferp); | |
737 | } else { | |
0a53f010 RS |
738 | scsi_task_set_iov_in(acb->task, |
739 | (struct scsi_iovec *) acb->ioh->dxferp, | |
740 | acb->ioh->iovec_count); | |
0a53f010 | 741 | } |
98392453 RS |
742 | } |
743 | ||
744 | iscsi_set_events(iscsilun); | |
745 | ||
746 | return &acb->common; | |
747 | } | |
748 | ||
f1a12821 RS |
749 | static void ioctl_cb(void *opaque, int status) |
750 | { | |
751 | int *p_status = opaque; | |
752 | *p_status = status; | |
753 | } | |
754 | ||
98392453 RS |
755 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
756 | { | |
757 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 758 | int status; |
98392453 RS |
759 | |
760 | switch (req) { | |
761 | case SG_GET_VERSION_NUM: | |
762 | *(int *)buf = 30000; | |
763 | break; | |
764 | case SG_GET_SCSI_ID: | |
765 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
766 | break; | |
f1a12821 RS |
767 | case SG_IO: |
768 | status = -EINPROGRESS; | |
769 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
770 | ||
771 | while (status == -EINPROGRESS) { | |
80cf6257 | 772 | aio_poll(iscsilun->aio_context, true); |
f1a12821 RS |
773 | } |
774 | ||
775 | return 0; | |
98392453 RS |
776 | default: |
777 | return -1; | |
778 | } | |
779 | return 0; | |
780 | } | |
781 | #endif | |
782 | ||
c589b249 RS |
783 | static int64_t |
784 | iscsi_getlength(BlockDriverState *bs) | |
785 | { | |
786 | IscsiLun *iscsilun = bs->opaque; | |
787 | int64_t len; | |
788 | ||
789 | len = iscsilun->num_blocks; | |
790 | len *= iscsilun->block_size; | |
791 | ||
792 | return len; | |
793 | } | |
794 | ||
65f3e339 PL |
795 | static int |
796 | coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, | |
797 | int nb_sectors) | |
798 | { | |
799 | IscsiLun *iscsilun = bs->opaque; | |
800 | struct IscsiTask iTask; | |
801 | struct unmap_list list; | |
65f3e339 PL |
802 | |
803 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
804 | return -EINVAL; | |
805 | } | |
806 | ||
807 | if (!iscsilun->lbp.lbpu) { | |
808 | /* UNMAP is not supported by the target */ | |
809 | return 0; | |
810 | } | |
811 | ||
812 | list.lba = sector_qemu2lun(sector_num, iscsilun); | |
01a6a238 | 813 | list.num = sector_qemu2lun(nb_sectors, iscsilun); |
65f3e339 | 814 | |
01a6a238 | 815 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
65f3e339 | 816 | retry: |
01a6a238 PL |
817 | if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
818 | iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 819 | return -ENOMEM; |
01a6a238 | 820 | } |
65f3e339 | 821 | |
01a6a238 PL |
822 | while (!iTask.complete) { |
823 | iscsi_set_events(iscsilun); | |
824 | qemu_coroutine_yield(); | |
825 | } | |
65f3e339 | 826 | |
01a6a238 PL |
827 | if (iTask.task != NULL) { |
828 | scsi_free_scsi_task(iTask.task); | |
829 | iTask.task = NULL; | |
830 | } | |
65f3e339 | 831 | |
01a6a238 | 832 | if (iTask.do_retry) { |
837c3901 | 833 | iTask.complete = 0; |
01a6a238 PL |
834 | goto retry; |
835 | } | |
65f3e339 | 836 | |
01a6a238 PL |
837 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION) { |
838 | /* the target might fail with a check condition if it | |
839 | is not happy with the alignment of the UNMAP request | |
840 | we silently fail in this case */ | |
841 | return 0; | |
842 | } | |
65f3e339 | 843 | |
01a6a238 PL |
844 | if (iTask.status != SCSI_STATUS_GOOD) { |
845 | return -EIO; | |
65f3e339 PL |
846 | } |
847 | ||
b03c3805 PL |
848 | iscsi_allocationmap_clear(iscsilun, sector_num, nb_sectors); |
849 | ||
65f3e339 PL |
850 | return 0; |
851 | } | |
852 | ||
d4cd9615 PL |
853 | static int |
854 | coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, | |
855 | int nb_sectors, BdrvRequestFlags flags) | |
856 | { | |
857 | IscsiLun *iscsilun = bs->opaque; | |
858 | struct IscsiTask iTask; | |
859 | uint64_t lba; | |
860 | uint32_t nb_blocks; | |
9281fe9e | 861 | bool use_16_for_ws = iscsilun->use_16_for_rw; |
d4cd9615 PL |
862 | |
863 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
864 | return -EINVAL; | |
865 | } | |
866 | ||
9281fe9e PL |
867 | if (flags & BDRV_REQ_MAY_UNMAP) { |
868 | if (!use_16_for_ws && !iscsilun->lbp.lbpws10) { | |
869 | /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */ | |
870 | use_16_for_ws = true; | |
871 | } | |
872 | if (use_16_for_ws && !iscsilun->lbp.lbpws) { | |
873 | /* WRITESAME16 with UNMAP is not supported by the target, | |
874 | * fall back and try WRITESAME10/16 without UNMAP */ | |
875 | flags &= ~BDRV_REQ_MAY_UNMAP; | |
876 | use_16_for_ws = iscsilun->use_16_for_rw; | |
877 | } | |
fa6252b0 PB |
878 | } |
879 | ||
dbe5c58f | 880 | if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) { |
9281fe9e | 881 | /* WRITESAME without UNMAP is not supported by the target */ |
d4cd9615 PL |
882 | return -ENOTSUP; |
883 | } | |
884 | ||
885 | lba = sector_qemu2lun(sector_num, iscsilun); | |
886 | nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); | |
887 | ||
888 | if (iscsilun->zeroblock == NULL) { | |
4d5a3f88 KW |
889 | iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size); |
890 | if (iscsilun->zeroblock == NULL) { | |
891 | return -ENOMEM; | |
892 | } | |
d4cd9615 PL |
893 | } |
894 | ||
895 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
896 | retry: | |
9281fe9e PL |
897 | if (use_16_for_ws) { |
898 | iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
899 | iscsilun->zeroblock, iscsilun->block_size, | |
900 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
901 | 0, 0, iscsi_co_generic_cb, &iTask); | |
902 | } else { | |
903 | iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
904 | iscsilun->zeroblock, iscsilun->block_size, | |
905 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
906 | 0, 0, iscsi_co_generic_cb, &iTask); | |
907 | } | |
908 | if (iTask.task == NULL) { | |
92397116 | 909 | return -ENOMEM; |
d4cd9615 PL |
910 | } |
911 | ||
912 | while (!iTask.complete) { | |
913 | iscsi_set_events(iscsilun); | |
914 | qemu_coroutine_yield(); | |
915 | } | |
916 | ||
d9738fd2 PL |
917 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION && |
918 | iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && | |
27898a5d PB |
919 | (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE || |
920 | iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) { | |
d9738fd2 PL |
921 | /* WRITE SAME is not supported by the target */ |
922 | iscsilun->has_write_same = false; | |
923 | scsi_free_scsi_task(iTask.task); | |
924 | return -ENOTSUP; | |
925 | } | |
926 | ||
d4cd9615 PL |
927 | if (iTask.task != NULL) { |
928 | scsi_free_scsi_task(iTask.task); | |
929 | iTask.task = NULL; | |
930 | } | |
931 | ||
932 | if (iTask.do_retry) { | |
837c3901 | 933 | iTask.complete = 0; |
d4cd9615 PL |
934 | goto retry; |
935 | } | |
936 | ||
937 | if (iTask.status != SCSI_STATUS_GOOD) { | |
938 | return -EIO; | |
939 | } | |
940 | ||
b03c3805 PL |
941 | if (flags & BDRV_REQ_MAY_UNMAP) { |
942 | iscsi_allocationmap_clear(iscsilun, sector_num, nb_sectors); | |
943 | } else { | |
944 | iscsi_allocationmap_set(iscsilun, sector_num, nb_sectors); | |
945 | } | |
946 | ||
d4cd9615 PL |
947 | return 0; |
948 | } | |
949 | ||
f2917853 PB |
950 | static void parse_chap(struct iscsi_context *iscsi, const char *target, |
951 | Error **errp) | |
f9dadc98 RS |
952 | { |
953 | QemuOptsList *list; | |
954 | QemuOpts *opts; | |
955 | const char *user = NULL; | |
956 | const char *password = NULL; | |
957 | ||
958 | list = qemu_find_opts("iscsi"); | |
959 | if (!list) { | |
f2917853 | 960 | return; |
f9dadc98 RS |
961 | } |
962 | ||
963 | opts = qemu_opts_find(list, target); | |
964 | if (opts == NULL) { | |
965 | opts = QTAILQ_FIRST(&list->head); | |
966 | if (!opts) { | |
f2917853 | 967 | return; |
f9dadc98 RS |
968 | } |
969 | } | |
970 | ||
971 | user = qemu_opt_get(opts, "user"); | |
972 | if (!user) { | |
f2917853 | 973 | return; |
f9dadc98 RS |
974 | } |
975 | ||
976 | password = qemu_opt_get(opts, "password"); | |
977 | if (!password) { | |
f2917853 PB |
978 | error_setg(errp, "CHAP username specified but no password was given"); |
979 | return; | |
f9dadc98 RS |
980 | } |
981 | ||
982 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
f2917853 | 983 | error_setg(errp, "Failed to set initiator username and password"); |
f9dadc98 | 984 | } |
f9dadc98 RS |
985 | } |
986 | ||
f2917853 PB |
987 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target, |
988 | Error **errp) | |
f9dadc98 RS |
989 | { |
990 | QemuOptsList *list; | |
991 | QemuOpts *opts; | |
992 | const char *digest = NULL; | |
993 | ||
994 | list = qemu_find_opts("iscsi"); | |
995 | if (!list) { | |
996 | return; | |
997 | } | |
998 | ||
999 | opts = qemu_opts_find(list, target); | |
1000 | if (opts == NULL) { | |
1001 | opts = QTAILQ_FIRST(&list->head); | |
1002 | if (!opts) { | |
1003 | return; | |
1004 | } | |
1005 | } | |
1006 | ||
1007 | digest = qemu_opt_get(opts, "header-digest"); | |
1008 | if (!digest) { | |
1009 | return; | |
1010 | } | |
1011 | ||
1012 | if (!strcmp(digest, "CRC32C")) { | |
1013 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
1014 | } else if (!strcmp(digest, "NONE")) { | |
1015 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
1016 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
1017 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
1018 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
1019 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1020 | } else { | |
f2917853 | 1021 | error_setg(errp, "Invalid header-digest setting : %s", digest); |
f9dadc98 RS |
1022 | } |
1023 | } | |
1024 | ||
1025 | static char *parse_initiator_name(const char *target) | |
1026 | { | |
1027 | QemuOptsList *list; | |
1028 | QemuOpts *opts; | |
5accc840 PB |
1029 | const char *name; |
1030 | char *iscsi_name; | |
1031 | UuidInfo *uuid_info; | |
f9dadc98 RS |
1032 | |
1033 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
1034 | if (list) { |
1035 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 1036 | if (!opts) { |
f2ef4a6d PB |
1037 | opts = QTAILQ_FIRST(&list->head); |
1038 | } | |
1039 | if (opts) { | |
1040 | name = qemu_opt_get(opts, "initiator-name"); | |
5accc840 PB |
1041 | if (name) { |
1042 | return g_strdup(name); | |
1043 | } | |
f9dadc98 RS |
1044 | } |
1045 | } | |
1046 | ||
5accc840 PB |
1047 | uuid_info = qmp_query_uuid(NULL); |
1048 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
1049 | name = qemu_get_vm_name(); | |
f2ef4a6d | 1050 | } else { |
5accc840 | 1051 | name = uuid_info->UUID; |
f9dadc98 | 1052 | } |
5accc840 PB |
1053 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
1054 | name ? ":" : "", name ? name : ""); | |
1055 | qapi_free_UuidInfo(uuid_info); | |
1056 | return iscsi_name; | |
f9dadc98 RS |
1057 | } |
1058 | ||
5b5d34ec PL |
1059 | static void iscsi_nop_timed_event(void *opaque) |
1060 | { | |
1061 | IscsiLun *iscsilun = opaque; | |
1062 | ||
1063 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
1064 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
1065 | iscsi_reconnect(iscsilun->iscsi); | |
1066 | } | |
1067 | ||
1068 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
1069 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
1070 | return; | |
1071 | } | |
1072 | ||
bc72ad67 | 1073 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec PL |
1074 | iscsi_set_events(iscsilun); |
1075 | } | |
5b5d34ec | 1076 | |
f2917853 | 1077 | static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp) |
cb1b83e7 PL |
1078 | { |
1079 | struct scsi_task *task = NULL; | |
1080 | struct scsi_readcapacity10 *rc10 = NULL; | |
1081 | struct scsi_readcapacity16 *rc16 = NULL; | |
cb1b83e7 PL |
1082 | int retries = ISCSI_CMD_RETRIES; |
1083 | ||
1288844e PB |
1084 | do { |
1085 | if (task != NULL) { | |
1086 | scsi_free_scsi_task(task); | |
1087 | task = NULL; | |
cb1b83e7 | 1088 | } |
1288844e PB |
1089 | |
1090 | switch (iscsilun->type) { | |
1091 | case TYPE_DISK: | |
1092 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
1093 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1094 | rc16 = scsi_datain_unmarshall(task); | |
1095 | if (rc16 == NULL) { | |
f2917853 | 1096 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data."); |
1288844e PB |
1097 | } else { |
1098 | iscsilun->block_size = rc16->block_length; | |
1099 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
f18a7cbb PL |
1100 | iscsilun->lbpme = rc16->lbpme; |
1101 | iscsilun->lbprz = rc16->lbprz; | |
9281fe9e | 1102 | iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff); |
1288844e PB |
1103 | } |
1104 | } | |
1105 | break; | |
1106 | case TYPE_ROM: | |
1107 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1108 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1109 | rc10 = scsi_datain_unmarshall(task); | |
1110 | if (rc10 == NULL) { | |
f2917853 | 1111 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data."); |
1288844e PB |
1112 | } else { |
1113 | iscsilun->block_size = rc10->block_size; | |
1114 | if (rc10->lba == 0) { | |
1115 | /* blank disk loaded */ | |
1116 | iscsilun->num_blocks = 0; | |
1117 | } else { | |
1118 | iscsilun->num_blocks = rc10->lba + 1; | |
1119 | } | |
1120 | } | |
1121 | } | |
1122 | break; | |
1123 | default: | |
f2917853 | 1124 | return; |
cb1b83e7 | 1125 | } |
1288844e PB |
1126 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1127 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1128 | && retries-- > 0); | |
cb1b83e7 | 1129 | |
1288844e | 1130 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
f2917853 | 1131 | error_setg(errp, "iSCSI: failed to send readcapacity10 command."); |
1288844e | 1132 | } |
cb1b83e7 PL |
1133 | if (task) { |
1134 | scsi_free_scsi_task(task); | |
1135 | } | |
cb1b83e7 PL |
1136 | } |
1137 | ||
60beb341 KW |
1138 | /* TODO Convert to fine grained options */ |
1139 | static QemuOptsList runtime_opts = { | |
1140 | .name = "iscsi", | |
1141 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1142 | .desc = { | |
1143 | { | |
1144 | .name = "filename", | |
1145 | .type = QEMU_OPT_STRING, | |
1146 | .help = "URL to the iscsi image", | |
1147 | }, | |
1148 | { /* end of list */ } | |
1149 | }, | |
1150 | }; | |
1151 | ||
35cb1748 | 1152 | static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun, |
24d3bd67 | 1153 | int evpd, int pc, void **inq, Error **errp) |
35cb1748 PB |
1154 | { |
1155 | int full_size; | |
1156 | struct scsi_task *task = NULL; | |
1157 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64); | |
1158 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1159 | goto fail; | |
1160 | } | |
1161 | full_size = scsi_datain_getfullsize(task); | |
1162 | if (full_size > task->datain.size) { | |
1163 | scsi_free_scsi_task(task); | |
1164 | ||
1165 | /* we need more data for the full list */ | |
1166 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); | |
f18a7cbb PL |
1167 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1168 | goto fail; | |
1169 | } | |
35cb1748 | 1170 | } |
f18a7cbb | 1171 | |
24d3bd67 PL |
1172 | *inq = scsi_datain_unmarshall(task); |
1173 | if (*inq == NULL) { | |
1174 | error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob"); | |
172fc4dd | 1175 | goto fail_with_err; |
24d3bd67 PL |
1176 | } |
1177 | ||
35cb1748 | 1178 | return task; |
f18a7cbb PL |
1179 | |
1180 | fail: | |
172fc4dd MA |
1181 | error_setg(errp, "iSCSI: Inquiry command failed : %s", |
1182 | iscsi_get_error(iscsi)); | |
1183 | fail_with_err: | |
24d3bd67 | 1184 | if (task != NULL) { |
35cb1748 | 1185 | scsi_free_scsi_task(task); |
35cb1748 PB |
1186 | } |
1187 | return NULL; | |
f18a7cbb PL |
1188 | } |
1189 | ||
80cf6257 SH |
1190 | static void iscsi_detach_aio_context(BlockDriverState *bs) |
1191 | { | |
1192 | IscsiLun *iscsilun = bs->opaque; | |
1193 | ||
1194 | aio_set_fd_handler(iscsilun->aio_context, | |
1195 | iscsi_get_fd(iscsilun->iscsi), | |
1196 | NULL, NULL, NULL); | |
1197 | iscsilun->events = 0; | |
1198 | ||
1199 | if (iscsilun->nop_timer) { | |
1200 | timer_del(iscsilun->nop_timer); | |
1201 | timer_free(iscsilun->nop_timer); | |
1202 | iscsilun->nop_timer = NULL; | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | static void iscsi_attach_aio_context(BlockDriverState *bs, | |
1207 | AioContext *new_context) | |
1208 | { | |
1209 | IscsiLun *iscsilun = bs->opaque; | |
1210 | ||
1211 | iscsilun->aio_context = new_context; | |
1212 | iscsi_set_events(iscsilun); | |
1213 | ||
80cf6257 SH |
1214 | /* Set up a timer for sending out iSCSI NOPs */ |
1215 | iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context, | |
1216 | QEMU_CLOCK_REALTIME, SCALE_MS, | |
1217 | iscsi_nop_timed_event, iscsilun); | |
1218 | timer_mod(iscsilun->nop_timer, | |
1219 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
80cf6257 SH |
1220 | } |
1221 | ||
c589b249 RS |
1222 | /* |
1223 | * We support iscsi url's on the form | |
1224 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
28f106af JC |
1225 | * |
1226 | * Note: flags are currently not used by iscsi_open. If this function | |
1227 | * is changed such that flags are used, please examine iscsi_reopen_prepare() | |
1228 | * to see if needs to be changed as well. | |
c589b249 | 1229 | */ |
015a1036 HR |
1230 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1231 | Error **errp) | |
c589b249 RS |
1232 | { |
1233 | IscsiLun *iscsilun = bs->opaque; | |
1234 | struct iscsi_context *iscsi = NULL; | |
1235 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1236 | struct scsi_task *task = NULL; |
1237 | struct scsi_inquiry_standard *inq = NULL; | |
24d3bd67 | 1238 | struct scsi_inquiry_supported_pages *inq_vpd; |
f9dadc98 | 1239 | char *initiator_name = NULL; |
60beb341 KW |
1240 | QemuOpts *opts; |
1241 | Error *local_err = NULL; | |
1242 | const char *filename; | |
24d3bd67 | 1243 | int i, ret; |
c589b249 RS |
1244 | |
1245 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
f2917853 PB |
1246 | error_setg(errp, "iSCSI: Invalid BDRV_SECTOR_SIZE. " |
1247 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
1248 | "of 512", BDRV_SECTOR_SIZE); | |
c589b249 RS |
1249 | return -EINVAL; |
1250 | } | |
1251 | ||
87ea75d5 | 1252 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
60beb341 | 1253 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 1254 | if (local_err) { |
f2917853 | 1255 | error_propagate(errp, local_err); |
60beb341 KW |
1256 | ret = -EINVAL; |
1257 | goto out; | |
1258 | } | |
1259 | ||
1260 | filename = qemu_opt_get(opts, "filename"); | |
1261 | ||
c589b249 RS |
1262 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1263 | if (iscsi_url == NULL) { | |
f2917853 | 1264 | error_setg(errp, "Failed to parse URL : %s", filename); |
c589b249 | 1265 | ret = -EINVAL; |
b93c94f7 | 1266 | goto out; |
c589b249 RS |
1267 | } |
1268 | ||
f9dadc98 RS |
1269 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1270 | ||
1271 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1272 | ||
1273 | iscsi = iscsi_create_context(initiator_name); | |
1274 | if (iscsi == NULL) { | |
f2917853 | 1275 | error_setg(errp, "iSCSI: Failed to create iSCSI context."); |
f9dadc98 | 1276 | ret = -ENOMEM; |
b93c94f7 | 1277 | goto out; |
f9dadc98 RS |
1278 | } |
1279 | ||
c589b249 | 1280 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
f2917853 | 1281 | error_setg(errp, "iSCSI: Failed to set target name."); |
c589b249 | 1282 | ret = -EINVAL; |
b93c94f7 | 1283 | goto out; |
c589b249 RS |
1284 | } |
1285 | ||
1286 | if (iscsi_url->user != NULL) { | |
1287 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
1288 | iscsi_url->passwd); | |
1289 | if (ret != 0) { | |
f2917853 | 1290 | error_setg(errp, "Failed to set initiator username and password"); |
c589b249 | 1291 | ret = -EINVAL; |
b93c94f7 | 1292 | goto out; |
c589b249 RS |
1293 | } |
1294 | } | |
f9dadc98 RS |
1295 | |
1296 | /* check if we got CHAP username/password via the options */ | |
f2917853 PB |
1297 | parse_chap(iscsi, iscsi_url->target, &local_err); |
1298 | if (local_err != NULL) { | |
1299 | error_propagate(errp, local_err); | |
f9dadc98 | 1300 | ret = -EINVAL; |
b93c94f7 | 1301 | goto out; |
f9dadc98 RS |
1302 | } |
1303 | ||
c589b249 | 1304 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
f2917853 | 1305 | error_setg(errp, "iSCSI: Failed to set session type to normal."); |
c589b249 | 1306 | ret = -EINVAL; |
b93c94f7 | 1307 | goto out; |
c589b249 RS |
1308 | } |
1309 | ||
1310 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1311 | ||
f9dadc98 | 1312 | /* check if we got HEADER_DIGEST via the options */ |
f2917853 PB |
1313 | parse_header_digest(iscsi, iscsi_url->target, &local_err); |
1314 | if (local_err != NULL) { | |
1315 | error_propagate(errp, local_err); | |
1316 | ret = -EINVAL; | |
1317 | goto out; | |
1318 | } | |
f9dadc98 | 1319 | |
e829b0bb | 1320 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
f2917853 | 1321 | error_setg(errp, "iSCSI: Failed to connect to LUN : %s", |
e829b0bb PL |
1322 | iscsi_get_error(iscsi)); |
1323 | ret = -EINVAL; | |
1324 | goto out; | |
1325 | } | |
c589b249 RS |
1326 | |
1327 | iscsilun->iscsi = iscsi; | |
80cf6257 | 1328 | iscsilun->aio_context = bdrv_get_aio_context(bs); |
c589b249 | 1329 | iscsilun->lun = iscsi_url->lun; |
24d3bd67 | 1330 | iscsilun->has_write_same = true; |
c589b249 | 1331 | |
24d3bd67 PL |
1332 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0, |
1333 | (void **) &inq, errp); | |
1334 | if (task == NULL) { | |
c589b249 | 1335 | ret = -EINVAL; |
b93c94f7 | 1336 | goto out; |
c589b249 | 1337 | } |
e829b0bb | 1338 | iscsilun->type = inq->periperal_device_type; |
24d3bd67 PL |
1339 | scsi_free_scsi_task(task); |
1340 | task = NULL; | |
e829b0bb | 1341 | |
f2917853 PB |
1342 | iscsi_readcapacity_sync(iscsilun, &local_err); |
1343 | if (local_err != NULL) { | |
1344 | error_propagate(errp, local_err); | |
cd82b6fb | 1345 | ret = -EINVAL; |
cb1b83e7 | 1346 | goto out; |
e829b0bb | 1347 | } |
0777b5dd | 1348 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
2c9880c4 | 1349 | bs->request_alignment = iscsilun->block_size; |
e829b0bb | 1350 | |
f47c3f5a KW |
1351 | /* We don't have any emulation for devices other than disks and CD-ROMs, so |
1352 | * this must be sg ioctl compatible. We force it to be sg, otherwise qemu | |
1353 | * will try to read from the device to guess the image format. | |
622695a4 | 1354 | */ |
f47c3f5a | 1355 | if (iscsilun->type != TYPE_DISK && iscsilun->type != TYPE_ROM) { |
622695a4 RS |
1356 | bs->sg = 1; |
1357 | } | |
1358 | ||
24d3bd67 PL |
1359 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, |
1360 | SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES, | |
1361 | (void **) &inq_vpd, errp); | |
1362 | if (task == NULL) { | |
1363 | ret = -EINVAL; | |
1364 | goto out; | |
f18a7cbb | 1365 | } |
24d3bd67 PL |
1366 | for (i = 0; i < inq_vpd->num_pages; i++) { |
1367 | struct scsi_task *inq_task; | |
1368 | struct scsi_inquiry_logical_block_provisioning *inq_lbp; | |
f18a7cbb | 1369 | struct scsi_inquiry_block_limits *inq_bl; |
24d3bd67 PL |
1370 | switch (inq_vpd->pages[i]) { |
1371 | case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING: | |
1372 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1373 | SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING, | |
1374 | (void **) &inq_lbp, errp); | |
1375 | if (inq_task == NULL) { | |
1376 | ret = -EINVAL; | |
1377 | goto out; | |
1378 | } | |
1379 | memcpy(&iscsilun->lbp, inq_lbp, | |
1380 | sizeof(struct scsi_inquiry_logical_block_provisioning)); | |
1381 | scsi_free_scsi_task(inq_task); | |
1382 | break; | |
1383 | case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS: | |
1384 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1385 | SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS, | |
1386 | (void **) &inq_bl, errp); | |
1387 | if (inq_task == NULL) { | |
1388 | ret = -EINVAL; | |
1389 | goto out; | |
1390 | } | |
1391 | memcpy(&iscsilun->bl, inq_bl, | |
1392 | sizeof(struct scsi_inquiry_block_limits)); | |
1393 | scsi_free_scsi_task(inq_task); | |
1394 | break; | |
1395 | default: | |
1396 | break; | |
f18a7cbb | 1397 | } |
f18a7cbb | 1398 | } |
24d3bd67 PL |
1399 | scsi_free_scsi_task(task); |
1400 | task = NULL; | |
f18a7cbb | 1401 | |
80cf6257 | 1402 | iscsi_attach_aio_context(bs, iscsilun->aio_context); |
5b5d34ec | 1403 | |
b03c3805 PL |
1404 | /* Guess the internal cluster (page) size of the iscsi target by the means |
1405 | * of opt_unmap_gran. Transfer the unmap granularity only if it has a | |
1406 | * reasonable size */ | |
3d2acaa3 | 1407 | if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 && |
b03c3805 PL |
1408 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { |
1409 | iscsilun->cluster_sectors = (iscsilun->bl.opt_unmap_gran * | |
1410 | iscsilun->block_size) >> BDRV_SECTOR_BITS; | |
b03c3805 | 1411 | if (iscsilun->lbprz && !(bs->open_flags & BDRV_O_NOCACHE)) { |
a9fe4c95 PL |
1412 | iscsilun->allocationmap = iscsi_allocationmap_init(iscsilun); |
1413 | if (iscsilun->allocationmap == NULL) { | |
1414 | ret = -ENOMEM; | |
1415 | } | |
b03c3805 | 1416 | } |
b03c3805 PL |
1417 | } |
1418 | ||
b93c94f7 | 1419 | out: |
60beb341 | 1420 | qemu_opts_del(opts); |
f7047c2d | 1421 | g_free(initiator_name); |
c589b249 RS |
1422 | if (iscsi_url != NULL) { |
1423 | iscsi_destroy_url(iscsi_url); | |
1424 | } | |
e829b0bb PL |
1425 | if (task != NULL) { |
1426 | scsi_free_scsi_task(task); | |
1427 | } | |
b93c94f7 PB |
1428 | |
1429 | if (ret) { | |
1430 | if (iscsi != NULL) { | |
1431 | iscsi_destroy_context(iscsi); | |
1432 | } | |
1433 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1434 | } |
c589b249 RS |
1435 | return ret; |
1436 | } | |
1437 | ||
1438 | static void iscsi_close(BlockDriverState *bs) | |
1439 | { | |
1440 | IscsiLun *iscsilun = bs->opaque; | |
1441 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1442 | ||
80cf6257 | 1443 | iscsi_detach_aio_context(bs); |
c589b249 | 1444 | iscsi_destroy_context(iscsi); |
d4cd9615 | 1445 | g_free(iscsilun->zeroblock); |
b03c3805 | 1446 | g_free(iscsilun->allocationmap); |
c589b249 RS |
1447 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1448 | } | |
1449 | ||
3baca891 | 1450 | static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp) |
d34682cd KW |
1451 | { |
1452 | IscsiLun *iscsilun = bs->opaque; | |
1453 | ||
1454 | /* We don't actually refresh here, but just return data queried in | |
1455 | * iscsi_open(): iscsi targets don't change their limits. */ | |
c97ca29d | 1456 | if (iscsilun->lbp.lbpu) { |
d34682cd KW |
1457 | if (iscsilun->bl.max_unmap < 0xffffffff) { |
1458 | bs->bl.max_discard = sector_lun2qemu(iscsilun->bl.max_unmap, | |
1459 | iscsilun); | |
1460 | } | |
1461 | bs->bl.discard_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, | |
1462 | iscsilun); | |
c97ca29d | 1463 | } |
d34682cd | 1464 | |
c97ca29d PB |
1465 | if (iscsilun->bl.max_ws_len < 0xffffffff) { |
1466 | bs->bl.max_write_zeroes = sector_lun2qemu(iscsilun->bl.max_ws_len, | |
1467 | iscsilun); | |
1468 | } | |
1469 | if (iscsilun->lbp.lbpws) { | |
d34682cd KW |
1470 | bs->bl.write_zeroes_alignment = sector_lun2qemu(iscsilun->bl.opt_unmap_gran, |
1471 | iscsilun); | |
d34682cd | 1472 | } |
5d259fc7 PL |
1473 | bs->bl.opt_transfer_length = sector_lun2qemu(iscsilun->bl.opt_xfer_len, |
1474 | iscsilun); | |
e9f526ab | 1475 | } |
d34682cd | 1476 | |
28f106af JC |
1477 | /* Since iscsi_open() ignores bdrv_flags, there is nothing to do here in |
1478 | * prepare. Note that this will not re-establish a connection with an iSCSI | |
1479 | * target - it is effectively a NOP. */ | |
dc6afb99 JC |
1480 | static int iscsi_reopen_prepare(BDRVReopenState *state, |
1481 | BlockReopenQueue *queue, Error **errp) | |
1482 | { | |
28f106af | 1483 | /* NOP */ |
d34682cd KW |
1484 | return 0; |
1485 | } | |
1486 | ||
cb1b83e7 PL |
1487 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1488 | { | |
1489 | IscsiLun *iscsilun = bs->opaque; | |
f2917853 | 1490 | Error *local_err = NULL; |
cb1b83e7 PL |
1491 | |
1492 | if (iscsilun->type != TYPE_DISK) { | |
1493 | return -ENOTSUP; | |
1494 | } | |
1495 | ||
f2917853 PB |
1496 | iscsi_readcapacity_sync(iscsilun, &local_err); |
1497 | if (local_err != NULL) { | |
1498 | error_free(local_err); | |
1499 | return -EIO; | |
cb1b83e7 PL |
1500 | } |
1501 | ||
1502 | if (offset > iscsi_getlength(bs)) { | |
1503 | return -EINVAL; | |
1504 | } | |
1505 | ||
b03c3805 PL |
1506 | if (iscsilun->allocationmap != NULL) { |
1507 | g_free(iscsilun->allocationmap); | |
a9fe4c95 | 1508 | iscsilun->allocationmap = iscsi_allocationmap_init(iscsilun); |
b03c3805 PL |
1509 | } |
1510 | ||
cb1b83e7 PL |
1511 | return 0; |
1512 | } | |
1513 | ||
a59479e3 | 1514 | static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp) |
de8864e5 PL |
1515 | { |
1516 | int ret = 0; | |
1517 | int64_t total_size = 0; | |
13c91cb7 | 1518 | BlockDriverState *bs; |
de8864e5 | 1519 | IscsiLun *iscsilun = NULL; |
60beb341 | 1520 | QDict *bs_options; |
de8864e5 | 1521 | |
e4e9986b | 1522 | bs = bdrv_new(); |
de8864e5 PL |
1523 | |
1524 | /* Read out options */ | |
c2eb918e HT |
1525 | total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1526 | BDRV_SECTOR_SIZE); | |
5839e53b | 1527 | bs->opaque = g_new0(struct IscsiLun, 1); |
13c91cb7 | 1528 | iscsilun = bs->opaque; |
de8864e5 | 1529 | |
60beb341 KW |
1530 | bs_options = qdict_new(); |
1531 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
015a1036 | 1532 | ret = iscsi_open(bs, bs_options, 0, NULL); |
60beb341 KW |
1533 | QDECREF(bs_options); |
1534 | ||
de8864e5 PL |
1535 | if (ret != 0) { |
1536 | goto out; | |
1537 | } | |
80cf6257 | 1538 | iscsi_detach_aio_context(bs); |
de8864e5 PL |
1539 | if (iscsilun->type != TYPE_DISK) { |
1540 | ret = -ENODEV; | |
1541 | goto out; | |
1542 | } | |
13c91cb7 | 1543 | if (bs->total_sectors < total_size) { |
de8864e5 | 1544 | ret = -ENOSPC; |
d3bda7bc | 1545 | goto out; |
de8864e5 PL |
1546 | } |
1547 | ||
1548 | ret = 0; | |
1549 | out: | |
1550 | if (iscsilun->iscsi != NULL) { | |
1551 | iscsi_destroy_context(iscsilun->iscsi); | |
1552 | } | |
13c91cb7 FZ |
1553 | g_free(bs->opaque); |
1554 | bs->opaque = NULL; | |
4f6fd349 | 1555 | bdrv_unref(bs); |
de8864e5 PL |
1556 | return ret; |
1557 | } | |
1558 | ||
186d4f2b PL |
1559 | static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1560 | { | |
1561 | IscsiLun *iscsilun = bs->opaque; | |
1562 | bdi->unallocated_blocks_are_zero = !!iscsilun->lbprz; | |
1563 | bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; | |
b03c3805 | 1564 | bdi->cluster_size = iscsilun->cluster_sectors * BDRV_SECTOR_SIZE; |
186d4f2b PL |
1565 | return 0; |
1566 | } | |
1567 | ||
a59479e3 CL |
1568 | static QemuOptsList iscsi_create_opts = { |
1569 | .name = "iscsi-create-opts", | |
1570 | .head = QTAILQ_HEAD_INITIALIZER(iscsi_create_opts.head), | |
1571 | .desc = { | |
1572 | { | |
1573 | .name = BLOCK_OPT_SIZE, | |
1574 | .type = QEMU_OPT_SIZE, | |
1575 | .help = "Virtual disk size" | |
1576 | }, | |
1577 | { /* end of list */ } | |
1578 | } | |
de8864e5 PL |
1579 | }; |
1580 | ||
c589b249 RS |
1581 | static BlockDriver bdrv_iscsi = { |
1582 | .format_name = "iscsi", | |
1583 | .protocol_name = "iscsi", | |
1584 | ||
1585 | .instance_size = sizeof(IscsiLun), | |
030be321 | 1586 | .bdrv_needs_filename = true, |
c589b249 RS |
1587 | .bdrv_file_open = iscsi_open, |
1588 | .bdrv_close = iscsi_close, | |
c282e1fd | 1589 | .bdrv_create = iscsi_create, |
a59479e3 | 1590 | .create_opts = &iscsi_create_opts, |
dc6afb99 | 1591 | .bdrv_reopen_prepare = iscsi_reopen_prepare, |
c589b249 RS |
1592 | |
1593 | .bdrv_getlength = iscsi_getlength, | |
186d4f2b | 1594 | .bdrv_get_info = iscsi_get_info, |
cb1b83e7 | 1595 | .bdrv_truncate = iscsi_truncate, |
d34682cd | 1596 | .bdrv_refresh_limits = iscsi_refresh_limits, |
c589b249 | 1597 | |
54a5c1d5 | 1598 | .bdrv_co_get_block_status = iscsi_co_get_block_status, |
65f3e339 | 1599 | .bdrv_co_discard = iscsi_co_discard, |
d4cd9615 | 1600 | .bdrv_co_write_zeroes = iscsi_co_write_zeroes, |
063c3378 PL |
1601 | .bdrv_co_readv = iscsi_co_readv, |
1602 | .bdrv_co_writev = iscsi_co_writev, | |
1603 | .bdrv_co_flush_to_disk = iscsi_co_flush, | |
fa6acb0c | 1604 | |
98392453 RS |
1605 | #ifdef __linux__ |
1606 | .bdrv_ioctl = iscsi_ioctl, | |
1607 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1608 | #endif | |
80cf6257 SH |
1609 | |
1610 | .bdrv_detach_aio_context = iscsi_detach_aio_context, | |
1611 | .bdrv_attach_aio_context = iscsi_attach_aio_context, | |
c589b249 RS |
1612 | }; |
1613 | ||
4d454574 PB |
1614 | static QemuOptsList qemu_iscsi_opts = { |
1615 | .name = "iscsi", | |
1616 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1617 | .desc = { | |
1618 | { | |
1619 | .name = "user", | |
1620 | .type = QEMU_OPT_STRING, | |
1621 | .help = "username for CHAP authentication to target", | |
1622 | },{ | |
1623 | .name = "password", | |
1624 | .type = QEMU_OPT_STRING, | |
1625 | .help = "password for CHAP authentication to target", | |
1626 | },{ | |
1627 | .name = "header-digest", | |
1628 | .type = QEMU_OPT_STRING, | |
1629 | .help = "HeaderDigest setting. " | |
1630 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1631 | },{ | |
1632 | .name = "initiator-name", | |
1633 | .type = QEMU_OPT_STRING, | |
1634 | .help = "Initiator iqn name to use when connecting", | |
1635 | }, | |
1636 | { /* end of list */ } | |
1637 | }, | |
1638 | }; | |
1639 | ||
c589b249 RS |
1640 | static void iscsi_block_init(void) |
1641 | { | |
1642 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1643 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1644 | } |
1645 | ||
1646 | block_init(iscsi_block_init); |