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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> | |
03e40fef | 5 | * Copyright (c) 2012-2015 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" | |
d49b6836 | 41 | #include "qapi/qmp/qstring.h" |
c589b249 RS |
42 | |
43 | #include <iscsi/iscsi.h> | |
44 | #include <iscsi/scsi-lowlevel.h> | |
45 | ||
98392453 RS |
46 | #ifdef __linux__ |
47 | #include <scsi/sg.h> | |
0d09e41a | 48 | #include <block/scsi.h> |
98392453 | 49 | #endif |
c589b249 RS |
50 | |
51 | typedef struct IscsiLun { | |
52 | struct iscsi_context *iscsi; | |
80cf6257 | 53 | AioContext *aio_context; |
c589b249 | 54 | int lun; |
dbfff6d7 | 55 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 56 | int block_size; |
c7b4a952 | 57 | uint64_t num_blocks; |
c9b9f682 | 58 | int events; |
5b5d34ec | 59 | QEMUTimer *nop_timer; |
05b685fb | 60 | QEMUTimer *event_timer; |
f18a7cbb PL |
61 | struct scsi_inquiry_logical_block_provisioning lbp; |
62 | struct scsi_inquiry_block_limits bl; | |
d4cd9615 | 63 | unsigned char *zeroblock; |
b03c3805 PL |
64 | unsigned long *allocationmap; |
65 | int cluster_sectors; | |
9281fe9e | 66 | bool use_16_for_rw; |
43ae8fb1 | 67 | bool write_protected; |
0a386e48 PL |
68 | bool lbpme; |
69 | bool lbprz; | |
752ce451 | 70 | bool dpofua; |
0a386e48 | 71 | bool has_write_same; |
73b5394e | 72 | bool force_next_flush; |
c589b249 RS |
73 | } IscsiLun; |
74 | ||
54a5c1d5 PL |
75 | typedef struct IscsiTask { |
76 | int status; | |
77 | int complete; | |
78 | int retries; | |
79 | int do_retry; | |
80 | struct scsi_task *task; | |
81 | Coroutine *co; | |
8b9dfe90 | 82 | QEMUBH *bh; |
80cf6257 | 83 | IscsiLun *iscsilun; |
efc6de0d | 84 | QEMUTimer retry_timer; |
73b5394e | 85 | bool force_next_flush; |
54a5c1d5 PL |
86 | } IscsiTask; |
87 | ||
c589b249 | 88 | typedef struct IscsiAIOCB { |
7c84b1b8 | 89 | BlockAIOCB common; |
c589b249 RS |
90 | QEMUIOVector *qiov; |
91 | QEMUBH *bh; | |
92 | IscsiLun *iscsilun; | |
93 | struct scsi_task *task; | |
94 | uint8_t *buf; | |
95 | int status; | |
1dde716e PL |
96 | int64_t sector_num; |
97 | int nb_sectors; | |
98392453 RS |
98 | #ifdef __linux__ |
99 | sg_io_hdr_t *ioh; | |
100 | #endif | |
c589b249 RS |
101 | } IscsiAIOCB; |
102 | ||
05b685fb | 103 | #define EVENT_INTERVAL 250 |
5b5d34ec PL |
104 | #define NOP_INTERVAL 5000 |
105 | #define MAX_NOP_FAILURES 3 | |
efc6de0d | 106 | #define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times) |
59dd0a22 | 107 | static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048, 8192, 32768}; |
5b5d34ec | 108 | |
5d831be2 | 109 | /* this threshold is a trade-off knob to choose between |
5917af81 PL |
110 | * the potential additional overhead of an extra GET_LBA_STATUS request |
111 | * vs. unnecessarily reading a lot of zero sectors over the wire. | |
112 | * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES | |
113 | * sectors we check the allocation status of the area covered by the | |
114 | * request first if the allocationmap indicates that the area might be | |
115 | * unallocated. */ | |
116 | #define ISCSI_CHECKALLOC_THRES 64 | |
5b5d34ec | 117 | |
27cbd828 | 118 | static void |
cfb3f506 | 119 | iscsi_bh_cb(void *p) |
27cbd828 PB |
120 | { |
121 | IscsiAIOCB *acb = p; | |
122 | ||
123 | qemu_bh_delete(acb->bh); | |
124 | ||
4790b03d PB |
125 | g_free(acb->buf); |
126 | acb->buf = NULL; | |
127 | ||
722d9333 | 128 | acb->common.cb(acb->common.opaque, acb->status); |
27cbd828 | 129 | |
1bd075f2 PB |
130 | if (acb->task != NULL) { |
131 | scsi_free_scsi_task(acb->task); | |
132 | acb->task = NULL; | |
133 | } | |
134 | ||
8007429a | 135 | qemu_aio_unref(acb); |
27cbd828 PB |
136 | } |
137 | ||
cfb3f506 PB |
138 | static void |
139 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 140 | { |
1bd075f2 PB |
141 | if (acb->bh) { |
142 | return; | |
143 | } | |
80cf6257 | 144 | acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb); |
27cbd828 | 145 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
146 | } |
147 | ||
8b9dfe90 PL |
148 | static void iscsi_co_generic_bh_cb(void *opaque) |
149 | { | |
150 | struct IscsiTask *iTask = opaque; | |
fcd470d8 | 151 | iTask->complete = 1; |
8b9dfe90 PL |
152 | qemu_bh_delete(iTask->bh); |
153 | qemu_coroutine_enter(iTask->co, NULL); | |
154 | } | |
155 | ||
efc6de0d PL |
156 | static void iscsi_retry_timer_expired(void *opaque) |
157 | { | |
158 | struct IscsiTask *iTask = opaque; | |
fcd470d8 | 159 | iTask->complete = 1; |
efc6de0d PL |
160 | if (iTask->co) { |
161 | qemu_coroutine_enter(iTask->co, NULL); | |
162 | } | |
163 | } | |
164 | ||
165 | static inline unsigned exp_random(double mean) | |
166 | { | |
167 | return -mean * log((double)rand() / RAND_MAX); | |
168 | } | |
169 | ||
54a5c1d5 PL |
170 | static void |
171 | iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, | |
172 | void *command_data, void *opaque) | |
173 | { | |
174 | struct IscsiTask *iTask = opaque; | |
175 | struct scsi_task *task = command_data; | |
176 | ||
54a5c1d5 PL |
177 | iTask->status = status; |
178 | iTask->do_retry = 0; | |
179 | iTask->task = task; | |
180 | ||
54a5c1d5 | 181 | if (status != SCSI_STATUS_GOOD) { |
efc6de0d PL |
182 | if (iTask->retries++ < ISCSI_CMD_RETRIES) { |
183 | if (status == SCSI_STATUS_CHECK_CONDITION | |
184 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
185 | error_report("iSCSI CheckCondition: %s", | |
186 | iscsi_get_error(iscsi)); | |
187 | iTask->do_retry = 1; | |
188 | goto out; | |
189 | } | |
e380aff8 PL |
190 | /* status 0x28 is SCSI_TASK_SET_FULL. It was first introduced |
191 | * in libiscsi 1.10.0. Hardcode this value here to avoid | |
192 | * the need to bump the libiscsi requirement to 1.10.0 */ | |
193 | if (status == SCSI_STATUS_BUSY || status == 0x28) { | |
efc6de0d PL |
194 | unsigned retry_time = |
195 | exp_random(iscsi_retry_times[iTask->retries - 1]); | |
e380aff8 | 196 | error_report("iSCSI Busy/TaskSetFull (retry #%u in %u ms): %s", |
efc6de0d PL |
197 | iTask->retries, retry_time, |
198 | iscsi_get_error(iscsi)); | |
199 | aio_timer_init(iTask->iscsilun->aio_context, | |
200 | &iTask->retry_timer, QEMU_CLOCK_REALTIME, | |
201 | SCALE_MS, iscsi_retry_timer_expired, iTask); | |
202 | timer_mod(&iTask->retry_timer, | |
203 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time); | |
204 | iTask->do_retry = 1; | |
205 | return; | |
206 | } | |
207 | } | |
837c3901 | 208 | error_report("iSCSI Failure: %s", iscsi_get_error(iscsi)); |
73b5394e PL |
209 | } else { |
210 | iTask->iscsilun->force_next_flush |= iTask->force_next_flush; | |
54a5c1d5 PL |
211 | } |
212 | ||
213 | out: | |
214 | if (iTask->co) { | |
80cf6257 SH |
215 | iTask->bh = aio_bh_new(iTask->iscsilun->aio_context, |
216 | iscsi_co_generic_bh_cb, iTask); | |
8b9dfe90 | 217 | qemu_bh_schedule(iTask->bh); |
fcd470d8 PL |
218 | } else { |
219 | iTask->complete = 1; | |
54a5c1d5 PL |
220 | } |
221 | } | |
222 | ||
223 | static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) | |
224 | { | |
225 | *iTask = (struct IscsiTask) { | |
efc6de0d | 226 | .co = qemu_coroutine_self(), |
efc6de0d | 227 | .iscsilun = iscsilun, |
54a5c1d5 PL |
228 | }; |
229 | } | |
27cbd828 | 230 | |
c589b249 RS |
231 | static void |
232 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
233 | void *private_data) | |
234 | { | |
1bd075f2 PB |
235 | IscsiAIOCB *acb = private_data; |
236 | ||
237 | acb->status = -ECANCELED; | |
238 | iscsi_schedule_bh(acb); | |
c589b249 RS |
239 | } |
240 | ||
241 | static void | |
7c84b1b8 | 242 | iscsi_aio_cancel(BlockAIOCB *blockacb) |
c589b249 RS |
243 | { |
244 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
245 | IscsiLun *iscsilun = acb->iscsilun; | |
246 | ||
1bd075f2 PB |
247 | if (acb->status != -EINPROGRESS) { |
248 | return; | |
249 | } | |
250 | ||
b2090919 | 251 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 252 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 253 | iscsi_abort_task_cb, acb); |
b2090919 | 254 | |
c589b249 RS |
255 | } |
256 | ||
d7331bed | 257 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 | 258 | .aiocb_size = sizeof(IscsiAIOCB), |
722d9333 | 259 | .cancel_async = iscsi_aio_cancel, |
c589b249 RS |
260 | }; |
261 | ||
262 | ||
263 | static void iscsi_process_read(void *arg); | |
264 | static void iscsi_process_write(void *arg); | |
265 | ||
c589b249 RS |
266 | static void |
267 | iscsi_set_events(IscsiLun *iscsilun) | |
268 | { | |
269 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
05b685fb | 270 | int ev = iscsi_which_events(iscsi); |
c9b9f682 | 271 | |
c9b9f682 | 272 | if (ev != iscsilun->events) { |
80cf6257 SH |
273 | aio_set_fd_handler(iscsilun->aio_context, |
274 | iscsi_get_fd(iscsi), | |
05b685fb | 275 | (ev & POLLIN) ? iscsi_process_read : NULL, |
80cf6257 SH |
276 | (ev & POLLOUT) ? iscsi_process_write : NULL, |
277 | iscsilun); | |
05b685fb PL |
278 | iscsilun->events = ev; |
279 | } | |
c9b9f682 | 280 | |
05b685fb PL |
281 | /* newer versions of libiscsi may return zero events. In this |
282 | * case start a timer to ensure we are able to return to service | |
283 | * once this situation changes. */ | |
284 | if (!ev) { | |
285 | timer_mod(iscsilun->event_timer, | |
286 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); | |
c9b9f682 | 287 | } |
05b685fb | 288 | } |
c9b9f682 | 289 | |
05b685fb PL |
290 | static void iscsi_timed_set_events(void *opaque) |
291 | { | |
292 | IscsiLun *iscsilun = opaque; | |
293 | iscsi_set_events(iscsilun); | |
c589b249 RS |
294 | } |
295 | ||
296 | static void | |
297 | iscsi_process_read(void *arg) | |
298 | { | |
299 | IscsiLun *iscsilun = arg; | |
300 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
301 | ||
302 | iscsi_service(iscsi, POLLIN); | |
303 | iscsi_set_events(iscsilun); | |
304 | } | |
305 | ||
306 | static void | |
307 | iscsi_process_write(void *arg) | |
308 | { | |
309 | IscsiLun *iscsilun = arg; | |
310 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
311 | ||
312 | iscsi_service(iscsi, POLLOUT); | |
313 | iscsi_set_events(iscsilun); | |
314 | } | |
315 | ||
0777b5dd PL |
316 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
317 | { | |
318 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
319 | } | |
320 | ||
c589b249 RS |
321 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
322 | { | |
323 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
324 | } | |
325 | ||
91bea4e2 PL |
326 | static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
327 | IscsiLun *iscsilun) | |
328 | { | |
329 | if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size || | |
330 | (nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { | |
f5075224 RJ |
331 | error_report("iSCSI misaligned request: " |
332 | "iscsilun->block_size %u, sector_num %" PRIi64 | |
333 | ", nb_sectors %d", | |
91bea4e2 PL |
334 | iscsilun->block_size, sector_num, nb_sectors); |
335 | return 0; | |
336 | } | |
337 | return 1; | |
338 | } | |
339 | ||
a9fe4c95 PL |
340 | static unsigned long *iscsi_allocationmap_init(IscsiLun *iscsilun) |
341 | { | |
342 | return bitmap_try_new(DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks, | |
343 | iscsilun), | |
344 | iscsilun->cluster_sectors)); | |
345 | } | |
346 | ||
b03c3805 PL |
347 | static void iscsi_allocationmap_set(IscsiLun *iscsilun, int64_t sector_num, |
348 | int nb_sectors) | |
349 | { | |
350 | if (iscsilun->allocationmap == NULL) { | |
351 | return; | |
352 | } | |
353 | bitmap_set(iscsilun->allocationmap, | |
354 | sector_num / iscsilun->cluster_sectors, | |
355 | DIV_ROUND_UP(nb_sectors, iscsilun->cluster_sectors)); | |
356 | } | |
357 | ||
358 | static void iscsi_allocationmap_clear(IscsiLun *iscsilun, int64_t sector_num, | |
359 | int nb_sectors) | |
360 | { | |
361 | int64_t cluster_num, nb_clusters; | |
362 | if (iscsilun->allocationmap == NULL) { | |
363 | return; | |
364 | } | |
365 | cluster_num = DIV_ROUND_UP(sector_num, iscsilun->cluster_sectors); | |
366 | nb_clusters = (sector_num + nb_sectors) / iscsilun->cluster_sectors | |
367 | - cluster_num; | |
368 | if (nb_clusters > 0) { | |
369 | bitmap_clear(iscsilun->allocationmap, cluster_num, nb_clusters); | |
370 | } | |
371 | } | |
372 | ||
063c3378 PL |
373 | static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, |
374 | int64_t sector_num, int nb_sectors, | |
375 | QEMUIOVector *iov) | |
c589b249 | 376 | { |
063c3378 PL |
377 | IscsiLun *iscsilun = bs->opaque; |
378 | struct IscsiTask iTask; | |
f4dfa67f | 379 | uint64_t lba; |
063c3378 | 380 | uint32_t num_sectors; |
73b5394e | 381 | int fua; |
c589b249 | 382 | |
063c3378 PL |
383 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
384 | return -EINVAL; | |
385 | } | |
7371d56f | 386 | |
dc9e7163 PL |
387 | if (bs->bl.max_transfer_length && nb_sectors > bs->bl.max_transfer_length) { |
388 | error_report("iSCSI Error: Write of %d sectors exceeds max_xfer_len " | |
389 | "of %d sectors", nb_sectors, bs->bl.max_transfer_length); | |
390 | return -EINVAL; | |
391 | } | |
392 | ||
063c3378 PL |
393 | lba = sector_qemu2lun(sector_num, iscsilun); |
394 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
063c3378 PL |
395 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
396 | retry: | |
73b5394e PL |
397 | fua = iscsilun->dpofua && !bs->enable_write_cache; |
398 | iTask.force_next_flush = !fua; | |
9281fe9e PL |
399 | if (iscsilun->use_16_for_rw) { |
400 | iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
8c215a9f | 401 | NULL, num_sectors * iscsilun->block_size, |
73b5394e | 402 | iscsilun->block_size, 0, 0, fua, 0, 0, |
9281fe9e PL |
403 | iscsi_co_generic_cb, &iTask); |
404 | } else { | |
405 | iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
8c215a9f | 406 | NULL, num_sectors * iscsilun->block_size, |
73b5394e | 407 | iscsilun->block_size, 0, 0, fua, 0, 0, |
9281fe9e PL |
408 | iscsi_co_generic_cb, &iTask); |
409 | } | |
063c3378 | 410 | if (iTask.task == NULL) { |
92397116 | 411 | return -ENOMEM; |
f4dfa67f | 412 | } |
063c3378 PL |
413 | scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, |
414 | iov->niov); | |
063c3378 PL |
415 | while (!iTask.complete) { |
416 | iscsi_set_events(iscsilun); | |
417 | qemu_coroutine_yield(); | |
c589b249 RS |
418 | } |
419 | ||
063c3378 PL |
420 | if (iTask.task != NULL) { |
421 | scsi_free_scsi_task(iTask.task); | |
422 | iTask.task = NULL; | |
91bea4e2 PL |
423 | } |
424 | ||
063c3378 | 425 | if (iTask.do_retry) { |
837c3901 | 426 | iTask.complete = 0; |
063c3378 | 427 | goto retry; |
1dde716e PL |
428 | } |
429 | ||
063c3378 PL |
430 | if (iTask.status != SCSI_STATUS_GOOD) { |
431 | return -EIO; | |
c589b249 RS |
432 | } |
433 | ||
b03c3805 PL |
434 | iscsi_allocationmap_set(iscsilun, sector_num, nb_sectors); |
435 | ||
063c3378 | 436 | return 0; |
c589b249 RS |
437 | } |
438 | ||
b03c3805 PL |
439 | |
440 | static bool iscsi_allocationmap_is_allocated(IscsiLun *iscsilun, | |
441 | int64_t sector_num, int nb_sectors) | |
442 | { | |
443 | unsigned long size; | |
444 | if (iscsilun->allocationmap == NULL) { | |
445 | return true; | |
446 | } | |
447 | size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors); | |
448 | return !(find_next_bit(iscsilun->allocationmap, size, | |
449 | sector_num / iscsilun->cluster_sectors) == size); | |
450 | } | |
451 | ||
b03c3805 PL |
452 | static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, |
453 | int64_t sector_num, | |
454 | int nb_sectors, int *pnum) | |
455 | { | |
456 | IscsiLun *iscsilun = bs->opaque; | |
457 | struct scsi_get_lba_status *lbas = NULL; | |
458 | struct scsi_lba_status_descriptor *lbasd = NULL; | |
459 | struct IscsiTask iTask; | |
460 | int64_t ret; | |
461 | ||
462 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
463 | ||
464 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
465 | ret = -EINVAL; | |
466 | goto out; | |
467 | } | |
468 | ||
469 | /* default to all sectors allocated */ | |
470 | ret = BDRV_BLOCK_DATA; | |
471 | ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; | |
472 | *pnum = nb_sectors; | |
473 | ||
474 | /* LUN does not support logical block provisioning */ | |
0a386e48 | 475 | if (!iscsilun->lbpme) { |
b03c3805 PL |
476 | goto out; |
477 | } | |
478 | ||
479 | retry: | |
480 | if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun, | |
481 | sector_qemu2lun(sector_num, iscsilun), | |
482 | 8 + 16, iscsi_co_generic_cb, | |
483 | &iTask) == NULL) { | |
484 | ret = -ENOMEM; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | while (!iTask.complete) { | |
489 | iscsi_set_events(iscsilun); | |
490 | qemu_coroutine_yield(); | |
491 | } | |
492 | ||
493 | if (iTask.do_retry) { | |
494 | if (iTask.task != NULL) { | |
495 | scsi_free_scsi_task(iTask.task); | |
496 | iTask.task = NULL; | |
497 | } | |
498 | iTask.complete = 0; | |
499 | goto retry; | |
500 | } | |
501 | ||
502 | if (iTask.status != SCSI_STATUS_GOOD) { | |
503 | /* in case the get_lba_status_callout fails (i.e. | |
504 | * because the device is busy or the cmd is not | |
505 | * supported) we pretend all blocks are allocated | |
506 | * for backwards compatibility */ | |
507 | goto out; | |
508 | } | |
509 | ||
510 | lbas = scsi_datain_unmarshall(iTask.task); | |
511 | if (lbas == NULL) { | |
512 | ret = -EIO; | |
513 | goto out; | |
514 | } | |
515 | ||
516 | lbasd = &lbas->descriptors[0]; | |
517 | ||
518 | if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) { | |
519 | ret = -EIO; | |
520 | goto out; | |
521 | } | |
522 | ||
523 | *pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); | |
524 | ||
525 | if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED || | |
526 | lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { | |
527 | ret &= ~BDRV_BLOCK_DATA; | |
528 | if (iscsilun->lbprz) { | |
529 | ret |= BDRV_BLOCK_ZERO; | |
530 | } | |
531 | } | |
532 | ||
533 | if (ret & BDRV_BLOCK_ZERO) { | |
534 | iscsi_allocationmap_clear(iscsilun, sector_num, *pnum); | |
535 | } else { | |
536 | iscsi_allocationmap_set(iscsilun, sector_num, *pnum); | |
537 | } | |
538 | ||
539 | if (*pnum > nb_sectors) { | |
540 | *pnum = nb_sectors; | |
541 | } | |
542 | out: | |
543 | if (iTask.task != NULL) { | |
544 | scsi_free_scsi_task(iTask.task); | |
545 | } | |
546 | return ret; | |
547 | } | |
548 | ||
063c3378 PL |
549 | static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
550 | int64_t sector_num, int nb_sectors, | |
551 | QEMUIOVector *iov) | |
c589b249 | 552 | { |
063c3378 PL |
553 | IscsiLun *iscsilun = bs->opaque; |
554 | struct IscsiTask iTask; | |
1dde716e PL |
555 | uint64_t lba; |
556 | uint32_t num_sectors; | |
c589b249 | 557 | |
063c3378 PL |
558 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
559 | return -EINVAL; | |
f4dfa67f | 560 | } |
f4dfa67f | 561 | |
dc9e7163 PL |
562 | if (bs->bl.max_transfer_length && nb_sectors > bs->bl.max_transfer_length) { |
563 | error_report("iSCSI Error: Read of %d sectors exceeds max_xfer_len " | |
564 | "of %d sectors", nb_sectors, bs->bl.max_transfer_length); | |
565 | return -EINVAL; | |
566 | } | |
567 | ||
5917af81 | 568 | if (iscsilun->lbprz && nb_sectors >= ISCSI_CHECKALLOC_THRES && |
b03c3805 PL |
569 | !iscsi_allocationmap_is_allocated(iscsilun, sector_num, nb_sectors)) { |
570 | int64_t ret; | |
571 | int pnum; | |
572 | ret = iscsi_co_get_block_status(bs, sector_num, INT_MAX, &pnum); | |
573 | if (ret < 0) { | |
574 | return ret; | |
575 | } | |
576 | if (ret & BDRV_BLOCK_ZERO && pnum >= nb_sectors) { | |
577 | qemu_iovec_memset(iov, 0, 0x00, iov->size); | |
578 | return 0; | |
579 | } | |
580 | } | |
b03c3805 | 581 | |
063c3378 PL |
582 | lba = sector_qemu2lun(sector_num, iscsilun); |
583 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
f4dfa67f | 584 | |
063c3378 PL |
585 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
586 | retry: | |
9281fe9e | 587 | if (iscsilun->use_16_for_rw) { |
063c3378 PL |
588 | iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
589 | num_sectors * iscsilun->block_size, | |
590 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
591 | iscsi_co_generic_cb, &iTask); | |
9281fe9e | 592 | } else { |
063c3378 PL |
593 | iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
594 | num_sectors * iscsilun->block_size, | |
219c2521 | 595 | iscsilun->block_size, |
219c2521 | 596 | 0, 0, 0, 0, 0, |
063c3378 | 597 | iscsi_co_generic_cb, &iTask); |
f4dfa67f | 598 | } |
063c3378 | 599 | if (iTask.task == NULL) { |
92397116 | 600 | return -ENOMEM; |
c589b249 | 601 | } |
063c3378 | 602 | scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); |
91bea4e2 | 603 | |
063c3378 PL |
604 | while (!iTask.complete) { |
605 | iscsi_set_events(iscsilun); | |
606 | qemu_coroutine_yield(); | |
1dde716e | 607 | } |
c589b249 | 608 | |
063c3378 PL |
609 | if (iTask.task != NULL) { |
610 | scsi_free_scsi_task(iTask.task); | |
611 | iTask.task = NULL; | |
c589b249 RS |
612 | } |
613 | ||
063c3378 | 614 | if (iTask.do_retry) { |
837c3901 | 615 | iTask.complete = 0; |
063c3378 | 616 | goto retry; |
c589b249 RS |
617 | } |
618 | ||
063c3378 PL |
619 | if (iTask.status != SCSI_STATUS_GOOD) { |
620 | return -EIO; | |
1dde716e PL |
621 | } |
622 | ||
623 | return 0; | |
624 | } | |
625 | ||
063c3378 | 626 | static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
1dde716e PL |
627 | { |
628 | IscsiLun *iscsilun = bs->opaque; | |
063c3378 | 629 | struct IscsiTask iTask; |
1dde716e | 630 | |
b2f9c08a PB |
631 | if (bs->sg) { |
632 | return 0; | |
633 | } | |
634 | ||
73b5394e PL |
635 | if (!iscsilun->force_next_flush) { |
636 | return 0; | |
637 | } | |
638 | iscsilun->force_next_flush = false; | |
1dde716e | 639 | |
73b5394e | 640 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
063c3378 PL |
641 | retry: |
642 | if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, | |
643 | 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 644 | return -ENOMEM; |
063c3378 | 645 | } |
1dde716e | 646 | |
063c3378 PL |
647 | while (!iTask.complete) { |
648 | iscsi_set_events(iscsilun); | |
649 | qemu_coroutine_yield(); | |
650 | } | |
1dde716e | 651 | |
063c3378 PL |
652 | if (iTask.task != NULL) { |
653 | scsi_free_scsi_task(iTask.task); | |
654 | iTask.task = NULL; | |
c589b249 RS |
655 | } |
656 | ||
063c3378 | 657 | if (iTask.do_retry) { |
837c3901 | 658 | iTask.complete = 0; |
063c3378 PL |
659 | goto retry; |
660 | } | |
c589b249 | 661 | |
063c3378 PL |
662 | if (iTask.status != SCSI_STATUS_GOOD) { |
663 | return -EIO; | |
664 | } | |
665 | ||
666 | return 0; | |
c589b249 RS |
667 | } |
668 | ||
98392453 RS |
669 | #ifdef __linux__ |
670 | static void | |
671 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
672 | void *command_data, void *opaque) | |
673 | { | |
674 | IscsiAIOCB *acb = opaque; | |
675 | ||
0a53f010 RS |
676 | g_free(acb->buf); |
677 | acb->buf = NULL; | |
678 | ||
98392453 RS |
679 | acb->status = 0; |
680 | if (status < 0) { | |
681 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
682 | iscsi_get_error(iscsi)); | |
683 | acb->status = -EIO; | |
684 | } | |
685 | ||
686 | acb->ioh->driver_status = 0; | |
687 | acb->ioh->host_status = 0; | |
688 | acb->ioh->resid = 0; | |
689 | ||
690 | #define SG_ERR_DRIVER_SENSE 0x08 | |
691 | ||
692 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
693 | int ss; | |
694 | ||
695 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
696 | ||
697 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
698 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
699 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
700 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
701 | } | |
702 | ||
cfb3f506 | 703 | iscsi_schedule_bh(acb); |
98392453 RS |
704 | } |
705 | ||
7c84b1b8 | 706 | static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, |
98392453 | 707 | unsigned long int req, void *buf, |
097310b5 | 708 | BlockCompletionFunc *cb, void *opaque) |
98392453 RS |
709 | { |
710 | IscsiLun *iscsilun = bs->opaque; | |
711 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
712 | struct iscsi_data data; | |
713 | IscsiAIOCB *acb; | |
714 | ||
715 | assert(req == SG_IO); | |
716 | ||
d7331bed | 717 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
718 | |
719 | acb->iscsilun = iscsilun; | |
1bd075f2 PB |
720 | acb->bh = NULL; |
721 | acb->status = -EINPROGRESS; | |
98392453 RS |
722 | acb->buf = NULL; |
723 | acb->ioh = buf; | |
724 | ||
725 | acb->task = malloc(sizeof(struct scsi_task)); | |
726 | if (acb->task == NULL) { | |
727 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
728 | iscsi_get_error(iscsi)); | |
8007429a | 729 | qemu_aio_unref(acb); |
98392453 RS |
730 | return NULL; |
731 | } | |
732 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
733 | ||
734 | switch (acb->ioh->dxfer_direction) { | |
735 | case SG_DXFER_TO_DEV: | |
736 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
737 | break; | |
738 | case SG_DXFER_FROM_DEV: | |
739 | acb->task->xfer_dir = SCSI_XFER_READ; | |
740 | break; | |
741 | default: | |
742 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
743 | break; | |
744 | } | |
745 | ||
746 | acb->task->cdb_size = acb->ioh->cmd_len; | |
747 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
748 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
749 | ||
0a53f010 | 750 | data.size = 0; |
98392453 | 751 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
752 | if (acb->ioh->iovec_count == 0) { |
753 | data.data = acb->ioh->dxferp; | |
754 | data.size = acb->ioh->dxfer_len; | |
755 | } else { | |
0a53f010 RS |
756 | scsi_task_set_iov_out(acb->task, |
757 | (struct scsi_iovec *) acb->ioh->dxferp, | |
758 | acb->ioh->iovec_count); | |
0a53f010 | 759 | } |
98392453 | 760 | } |
0a53f010 | 761 | |
98392453 RS |
762 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
763 | iscsi_aio_ioctl_cb, | |
0a53f010 | 764 | (data.size > 0) ? &data : NULL, |
98392453 RS |
765 | acb) != 0) { |
766 | scsi_free_scsi_task(acb->task); | |
8007429a | 767 | qemu_aio_unref(acb); |
98392453 RS |
768 | return NULL; |
769 | } | |
770 | ||
771 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
772 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
773 | if (acb->ioh->iovec_count == 0) { |
774 | scsi_task_add_data_in_buffer(acb->task, | |
775 | acb->ioh->dxfer_len, | |
776 | acb->ioh->dxferp); | |
777 | } else { | |
0a53f010 RS |
778 | scsi_task_set_iov_in(acb->task, |
779 | (struct scsi_iovec *) acb->ioh->dxferp, | |
780 | acb->ioh->iovec_count); | |
0a53f010 | 781 | } |
98392453 RS |
782 | } |
783 | ||
784 | iscsi_set_events(iscsilun); | |
785 | ||
786 | return &acb->common; | |
787 | } | |
788 | ||
f1a12821 RS |
789 | static void ioctl_cb(void *opaque, int status) |
790 | { | |
791 | int *p_status = opaque; | |
792 | *p_status = status; | |
793 | } | |
794 | ||
98392453 RS |
795 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
796 | { | |
797 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 798 | int status; |
98392453 RS |
799 | |
800 | switch (req) { | |
801 | case SG_GET_VERSION_NUM: | |
802 | *(int *)buf = 30000; | |
803 | break; | |
804 | case SG_GET_SCSI_ID: | |
805 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
806 | break; | |
f1a12821 RS |
807 | case SG_IO: |
808 | status = -EINPROGRESS; | |
809 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
810 | ||
811 | while (status == -EINPROGRESS) { | |
80cf6257 | 812 | aio_poll(iscsilun->aio_context, true); |
f1a12821 RS |
813 | } |
814 | ||
815 | return 0; | |
98392453 RS |
816 | default: |
817 | return -1; | |
818 | } | |
819 | return 0; | |
820 | } | |
821 | #endif | |
822 | ||
c589b249 RS |
823 | static int64_t |
824 | iscsi_getlength(BlockDriverState *bs) | |
825 | { | |
826 | IscsiLun *iscsilun = bs->opaque; | |
827 | int64_t len; | |
828 | ||
829 | len = iscsilun->num_blocks; | |
830 | len *= iscsilun->block_size; | |
831 | ||
832 | return len; | |
833 | } | |
834 | ||
65f3e339 PL |
835 | static int |
836 | coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, | |
837 | int nb_sectors) | |
838 | { | |
839 | IscsiLun *iscsilun = bs->opaque; | |
840 | struct IscsiTask iTask; | |
841 | struct unmap_list list; | |
65f3e339 PL |
842 | |
843 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
844 | return -EINVAL; | |
845 | } | |
846 | ||
847 | if (!iscsilun->lbp.lbpu) { | |
848 | /* UNMAP is not supported by the target */ | |
849 | return 0; | |
850 | } | |
851 | ||
852 | list.lba = sector_qemu2lun(sector_num, iscsilun); | |
01a6a238 | 853 | list.num = sector_qemu2lun(nb_sectors, iscsilun); |
65f3e339 | 854 | |
01a6a238 | 855 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
65f3e339 | 856 | retry: |
01a6a238 PL |
857 | if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
858 | iscsi_co_generic_cb, &iTask) == NULL) { | |
92397116 | 859 | return -ENOMEM; |
01a6a238 | 860 | } |
65f3e339 | 861 | |
01a6a238 PL |
862 | while (!iTask.complete) { |
863 | iscsi_set_events(iscsilun); | |
864 | qemu_coroutine_yield(); | |
865 | } | |
65f3e339 | 866 | |
01a6a238 PL |
867 | if (iTask.task != NULL) { |
868 | scsi_free_scsi_task(iTask.task); | |
869 | iTask.task = NULL; | |
870 | } | |
65f3e339 | 871 | |
01a6a238 | 872 | if (iTask.do_retry) { |
837c3901 | 873 | iTask.complete = 0; |
01a6a238 PL |
874 | goto retry; |
875 | } | |
65f3e339 | 876 | |
01a6a238 PL |
877 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION) { |
878 | /* the target might fail with a check condition if it | |
879 | is not happy with the alignment of the UNMAP request | |
880 | we silently fail in this case */ | |
881 | return 0; | |
882 | } | |
65f3e339 | 883 | |
01a6a238 PL |
884 | if (iTask.status != SCSI_STATUS_GOOD) { |
885 | return -EIO; | |
65f3e339 PL |
886 | } |
887 | ||
b03c3805 PL |
888 | iscsi_allocationmap_clear(iscsilun, sector_num, nb_sectors); |
889 | ||
65f3e339 PL |
890 | return 0; |
891 | } | |
892 | ||
d4cd9615 PL |
893 | static int |
894 | coroutine_fn iscsi_co_write_zeroes(BlockDriverState *bs, int64_t sector_num, | |
895 | int nb_sectors, BdrvRequestFlags flags) | |
896 | { | |
897 | IscsiLun *iscsilun = bs->opaque; | |
898 | struct IscsiTask iTask; | |
899 | uint64_t lba; | |
900 | uint32_t nb_blocks; | |
9281fe9e | 901 | bool use_16_for_ws = iscsilun->use_16_for_rw; |
d4cd9615 PL |
902 | |
903 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { | |
904 | return -EINVAL; | |
905 | } | |
906 | ||
9281fe9e PL |
907 | if (flags & BDRV_REQ_MAY_UNMAP) { |
908 | if (!use_16_for_ws && !iscsilun->lbp.lbpws10) { | |
909 | /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */ | |
910 | use_16_for_ws = true; | |
911 | } | |
912 | if (use_16_for_ws && !iscsilun->lbp.lbpws) { | |
913 | /* WRITESAME16 with UNMAP is not supported by the target, | |
914 | * fall back and try WRITESAME10/16 without UNMAP */ | |
915 | flags &= ~BDRV_REQ_MAY_UNMAP; | |
916 | use_16_for_ws = iscsilun->use_16_for_rw; | |
917 | } | |
fa6252b0 PB |
918 | } |
919 | ||
dbe5c58f | 920 | if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) { |
9281fe9e | 921 | /* WRITESAME without UNMAP is not supported by the target */ |
d4cd9615 PL |
922 | return -ENOTSUP; |
923 | } | |
924 | ||
925 | lba = sector_qemu2lun(sector_num, iscsilun); | |
926 | nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); | |
927 | ||
928 | if (iscsilun->zeroblock == NULL) { | |
4d5a3f88 KW |
929 | iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size); |
930 | if (iscsilun->zeroblock == NULL) { | |
931 | return -ENOMEM; | |
932 | } | |
d4cd9615 PL |
933 | } |
934 | ||
935 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
73b5394e | 936 | iTask.force_next_flush = true; |
d4cd9615 | 937 | retry: |
9281fe9e PL |
938 | if (use_16_for_ws) { |
939 | iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
940 | iscsilun->zeroblock, iscsilun->block_size, | |
941 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
942 | 0, 0, iscsi_co_generic_cb, &iTask); | |
943 | } else { | |
944 | iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
945 | iscsilun->zeroblock, iscsilun->block_size, | |
946 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
947 | 0, 0, iscsi_co_generic_cb, &iTask); | |
948 | } | |
949 | if (iTask.task == NULL) { | |
92397116 | 950 | return -ENOMEM; |
d4cd9615 PL |
951 | } |
952 | ||
953 | while (!iTask.complete) { | |
954 | iscsi_set_events(iscsilun); | |
955 | qemu_coroutine_yield(); | |
956 | } | |
957 | ||
d9738fd2 PL |
958 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION && |
959 | iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && | |
27898a5d PB |
960 | (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE || |
961 | iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) { | |
d9738fd2 PL |
962 | /* WRITE SAME is not supported by the target */ |
963 | iscsilun->has_write_same = false; | |
964 | scsi_free_scsi_task(iTask.task); | |
965 | return -ENOTSUP; | |
966 | } | |
967 | ||
d4cd9615 PL |
968 | if (iTask.task != NULL) { |
969 | scsi_free_scsi_task(iTask.task); | |
970 | iTask.task = NULL; | |
971 | } | |
972 | ||
973 | if (iTask.do_retry) { | |
837c3901 | 974 | iTask.complete = 0; |
d4cd9615 PL |
975 | goto retry; |
976 | } | |
977 | ||
978 | if (iTask.status != SCSI_STATUS_GOOD) { | |
979 | return -EIO; | |
980 | } | |
981 | ||
b03c3805 PL |
982 | if (flags & BDRV_REQ_MAY_UNMAP) { |
983 | iscsi_allocationmap_clear(iscsilun, sector_num, nb_sectors); | |
984 | } else { | |
985 | iscsi_allocationmap_set(iscsilun, sector_num, nb_sectors); | |
986 | } | |
987 | ||
d4cd9615 PL |
988 | return 0; |
989 | } | |
990 | ||
f2917853 PB |
991 | static void parse_chap(struct iscsi_context *iscsi, const char *target, |
992 | Error **errp) | |
f9dadc98 RS |
993 | { |
994 | QemuOptsList *list; | |
995 | QemuOpts *opts; | |
996 | const char *user = NULL; | |
997 | const char *password = NULL; | |
998 | ||
999 | list = qemu_find_opts("iscsi"); | |
1000 | if (!list) { | |
f2917853 | 1001 | return; |
f9dadc98 RS |
1002 | } |
1003 | ||
1004 | opts = qemu_opts_find(list, target); | |
1005 | if (opts == NULL) { | |
1006 | opts = QTAILQ_FIRST(&list->head); | |
1007 | if (!opts) { | |
f2917853 | 1008 | return; |
f9dadc98 RS |
1009 | } |
1010 | } | |
1011 | ||
1012 | user = qemu_opt_get(opts, "user"); | |
1013 | if (!user) { | |
f2917853 | 1014 | return; |
f9dadc98 RS |
1015 | } |
1016 | ||
1017 | password = qemu_opt_get(opts, "password"); | |
1018 | if (!password) { | |
f2917853 PB |
1019 | error_setg(errp, "CHAP username specified but no password was given"); |
1020 | return; | |
f9dadc98 RS |
1021 | } |
1022 | ||
1023 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
f2917853 | 1024 | error_setg(errp, "Failed to set initiator username and password"); |
f9dadc98 | 1025 | } |
f9dadc98 RS |
1026 | } |
1027 | ||
f2917853 PB |
1028 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target, |
1029 | Error **errp) | |
f9dadc98 RS |
1030 | { |
1031 | QemuOptsList *list; | |
1032 | QemuOpts *opts; | |
1033 | const char *digest = NULL; | |
1034 | ||
1035 | list = qemu_find_opts("iscsi"); | |
1036 | if (!list) { | |
1037 | return; | |
1038 | } | |
1039 | ||
1040 | opts = qemu_opts_find(list, target); | |
1041 | if (opts == NULL) { | |
1042 | opts = QTAILQ_FIRST(&list->head); | |
1043 | if (!opts) { | |
1044 | return; | |
1045 | } | |
1046 | } | |
1047 | ||
1048 | digest = qemu_opt_get(opts, "header-digest"); | |
1049 | if (!digest) { | |
1050 | return; | |
1051 | } | |
1052 | ||
1053 | if (!strcmp(digest, "CRC32C")) { | |
1054 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
1055 | } else if (!strcmp(digest, "NONE")) { | |
1056 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
1057 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
1058 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
1059 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
1060 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1061 | } else { | |
f2917853 | 1062 | error_setg(errp, "Invalid header-digest setting : %s", digest); |
f9dadc98 RS |
1063 | } |
1064 | } | |
1065 | ||
1066 | static char *parse_initiator_name(const char *target) | |
1067 | { | |
1068 | QemuOptsList *list; | |
1069 | QemuOpts *opts; | |
5accc840 PB |
1070 | const char *name; |
1071 | char *iscsi_name; | |
1072 | UuidInfo *uuid_info; | |
f9dadc98 RS |
1073 | |
1074 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
1075 | if (list) { |
1076 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 1077 | if (!opts) { |
f2ef4a6d PB |
1078 | opts = QTAILQ_FIRST(&list->head); |
1079 | } | |
1080 | if (opts) { | |
1081 | name = qemu_opt_get(opts, "initiator-name"); | |
5accc840 PB |
1082 | if (name) { |
1083 | return g_strdup(name); | |
1084 | } | |
f9dadc98 RS |
1085 | } |
1086 | } | |
1087 | ||
5accc840 PB |
1088 | uuid_info = qmp_query_uuid(NULL); |
1089 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
1090 | name = qemu_get_vm_name(); | |
f2ef4a6d | 1091 | } else { |
5accc840 | 1092 | name = uuid_info->UUID; |
f9dadc98 | 1093 | } |
5accc840 PB |
1094 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
1095 | name ? ":" : "", name ? name : ""); | |
1096 | qapi_free_UuidInfo(uuid_info); | |
1097 | return iscsi_name; | |
f9dadc98 RS |
1098 | } |
1099 | ||
5b5d34ec PL |
1100 | static void iscsi_nop_timed_event(void *opaque) |
1101 | { | |
1102 | IscsiLun *iscsilun = opaque; | |
1103 | ||
1104 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
1105 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
1106 | iscsi_reconnect(iscsilun->iscsi); | |
1107 | } | |
1108 | ||
1109 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
1110 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
1111 | return; | |
1112 | } | |
1113 | ||
bc72ad67 | 1114 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec PL |
1115 | iscsi_set_events(iscsilun); |
1116 | } | |
5b5d34ec | 1117 | |
f2917853 | 1118 | static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp) |
cb1b83e7 PL |
1119 | { |
1120 | struct scsi_task *task = NULL; | |
1121 | struct scsi_readcapacity10 *rc10 = NULL; | |
1122 | struct scsi_readcapacity16 *rc16 = NULL; | |
cb1b83e7 PL |
1123 | int retries = ISCSI_CMD_RETRIES; |
1124 | ||
1288844e PB |
1125 | do { |
1126 | if (task != NULL) { | |
1127 | scsi_free_scsi_task(task); | |
1128 | task = NULL; | |
cb1b83e7 | 1129 | } |
1288844e PB |
1130 | |
1131 | switch (iscsilun->type) { | |
1132 | case TYPE_DISK: | |
1133 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
1134 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1135 | rc16 = scsi_datain_unmarshall(task); | |
1136 | if (rc16 == NULL) { | |
f2917853 | 1137 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data."); |
1288844e PB |
1138 | } else { |
1139 | iscsilun->block_size = rc16->block_length; | |
1140 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
0a386e48 PL |
1141 | iscsilun->lbpme = !!rc16->lbpme; |
1142 | iscsilun->lbprz = !!rc16->lbprz; | |
9281fe9e | 1143 | iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff); |
1288844e PB |
1144 | } |
1145 | } | |
1146 | break; | |
1147 | case TYPE_ROM: | |
1148 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1149 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1150 | rc10 = scsi_datain_unmarshall(task); | |
1151 | if (rc10 == NULL) { | |
f2917853 | 1152 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data."); |
1288844e PB |
1153 | } else { |
1154 | iscsilun->block_size = rc10->block_size; | |
1155 | if (rc10->lba == 0) { | |
1156 | /* blank disk loaded */ | |
1157 | iscsilun->num_blocks = 0; | |
1158 | } else { | |
1159 | iscsilun->num_blocks = rc10->lba + 1; | |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | break; | |
1164 | default: | |
f2917853 | 1165 | return; |
cb1b83e7 | 1166 | } |
1288844e PB |
1167 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1168 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1169 | && retries-- > 0); | |
cb1b83e7 | 1170 | |
1288844e | 1171 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
f2917853 | 1172 | error_setg(errp, "iSCSI: failed to send readcapacity10 command."); |
1288844e | 1173 | } |
cb1b83e7 PL |
1174 | if (task) { |
1175 | scsi_free_scsi_task(task); | |
1176 | } | |
cb1b83e7 PL |
1177 | } |
1178 | ||
60beb341 KW |
1179 | /* TODO Convert to fine grained options */ |
1180 | static QemuOptsList runtime_opts = { | |
1181 | .name = "iscsi", | |
1182 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1183 | .desc = { | |
1184 | { | |
1185 | .name = "filename", | |
1186 | .type = QEMU_OPT_STRING, | |
1187 | .help = "URL to the iscsi image", | |
1188 | }, | |
1189 | { /* end of list */ } | |
1190 | }, | |
1191 | }; | |
1192 | ||
35cb1748 | 1193 | static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun, |
24d3bd67 | 1194 | int evpd, int pc, void **inq, Error **errp) |
35cb1748 PB |
1195 | { |
1196 | int full_size; | |
1197 | struct scsi_task *task = NULL; | |
1198 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64); | |
1199 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1200 | goto fail; | |
1201 | } | |
1202 | full_size = scsi_datain_getfullsize(task); | |
1203 | if (full_size > task->datain.size) { | |
1204 | scsi_free_scsi_task(task); | |
1205 | ||
1206 | /* we need more data for the full list */ | |
1207 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); | |
f18a7cbb PL |
1208 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1209 | goto fail; | |
1210 | } | |
35cb1748 | 1211 | } |
f18a7cbb | 1212 | |
24d3bd67 PL |
1213 | *inq = scsi_datain_unmarshall(task); |
1214 | if (*inq == NULL) { | |
1215 | error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob"); | |
172fc4dd | 1216 | goto fail_with_err; |
24d3bd67 PL |
1217 | } |
1218 | ||
35cb1748 | 1219 | return task; |
f18a7cbb PL |
1220 | |
1221 | fail: | |
172fc4dd MA |
1222 | error_setg(errp, "iSCSI: Inquiry command failed : %s", |
1223 | iscsi_get_error(iscsi)); | |
1224 | fail_with_err: | |
24d3bd67 | 1225 | if (task != NULL) { |
35cb1748 | 1226 | scsi_free_scsi_task(task); |
35cb1748 PB |
1227 | } |
1228 | return NULL; | |
f18a7cbb PL |
1229 | } |
1230 | ||
80cf6257 SH |
1231 | static void iscsi_detach_aio_context(BlockDriverState *bs) |
1232 | { | |
1233 | IscsiLun *iscsilun = bs->opaque; | |
1234 | ||
1235 | aio_set_fd_handler(iscsilun->aio_context, | |
1236 | iscsi_get_fd(iscsilun->iscsi), | |
1237 | NULL, NULL, NULL); | |
1238 | iscsilun->events = 0; | |
1239 | ||
1240 | if (iscsilun->nop_timer) { | |
1241 | timer_del(iscsilun->nop_timer); | |
1242 | timer_free(iscsilun->nop_timer); | |
1243 | iscsilun->nop_timer = NULL; | |
1244 | } | |
05b685fb PL |
1245 | if (iscsilun->event_timer) { |
1246 | timer_del(iscsilun->event_timer); | |
1247 | timer_free(iscsilun->event_timer); | |
1248 | iscsilun->event_timer = NULL; | |
1249 | } | |
80cf6257 SH |
1250 | } |
1251 | ||
1252 | static void iscsi_attach_aio_context(BlockDriverState *bs, | |
1253 | AioContext *new_context) | |
1254 | { | |
1255 | IscsiLun *iscsilun = bs->opaque; | |
1256 | ||
1257 | iscsilun->aio_context = new_context; | |
1258 | iscsi_set_events(iscsilun); | |
1259 | ||
80cf6257 SH |
1260 | /* Set up a timer for sending out iSCSI NOPs */ |
1261 | iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context, | |
1262 | QEMU_CLOCK_REALTIME, SCALE_MS, | |
1263 | iscsi_nop_timed_event, iscsilun); | |
1264 | timer_mod(iscsilun->nop_timer, | |
1265 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
05b685fb PL |
1266 | |
1267 | /* Prepare a timer for a delayed call to iscsi_set_events */ | |
1268 | iscsilun->event_timer = aio_timer_new(iscsilun->aio_context, | |
1269 | QEMU_CLOCK_REALTIME, SCALE_MS, | |
1270 | iscsi_timed_set_events, iscsilun); | |
80cf6257 SH |
1271 | } |
1272 | ||
7191f208 | 1273 | static void iscsi_modesense_sync(IscsiLun *iscsilun) |
c1d4096b FZ |
1274 | { |
1275 | struct scsi_task *task; | |
1276 | struct scsi_mode_sense *ms = NULL; | |
7191f208 | 1277 | iscsilun->write_protected = false; |
752ce451 | 1278 | iscsilun->dpofua = false; |
c1d4096b FZ |
1279 | |
1280 | task = iscsi_modesense6_sync(iscsilun->iscsi, iscsilun->lun, | |
1281 | 1, SCSI_MODESENSE_PC_CURRENT, | |
1282 | 0x3F, 0, 255); | |
1283 | if (task == NULL) { | |
1284 | error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s", | |
1285 | iscsi_get_error(iscsilun->iscsi)); | |
1286 | goto out; | |
1287 | } | |
1288 | ||
1289 | if (task->status != SCSI_STATUS_GOOD) { | |
1290 | error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable"); | |
1291 | goto out; | |
1292 | } | |
1293 | ms = scsi_datain_unmarshall(task); | |
1294 | if (!ms) { | |
1295 | error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s", | |
1296 | iscsi_get_error(iscsilun->iscsi)); | |
1297 | goto out; | |
1298 | } | |
7191f208 | 1299 | iscsilun->write_protected = ms->device_specific_parameter & 0x80; |
752ce451 | 1300 | iscsilun->dpofua = ms->device_specific_parameter & 0x10; |
c1d4096b FZ |
1301 | |
1302 | out: | |
1303 | if (task) { | |
1304 | scsi_free_scsi_task(task); | |
1305 | } | |
c1d4096b FZ |
1306 | } |
1307 | ||
c589b249 RS |
1308 | /* |
1309 | * We support iscsi url's on the form | |
1310 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1311 | */ | |
015a1036 HR |
1312 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1313 | Error **errp) | |
c589b249 RS |
1314 | { |
1315 | IscsiLun *iscsilun = bs->opaque; | |
1316 | struct iscsi_context *iscsi = NULL; | |
1317 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1318 | struct scsi_task *task = NULL; |
1319 | struct scsi_inquiry_standard *inq = NULL; | |
24d3bd67 | 1320 | struct scsi_inquiry_supported_pages *inq_vpd; |
f9dadc98 | 1321 | char *initiator_name = NULL; |
60beb341 KW |
1322 | QemuOpts *opts; |
1323 | Error *local_err = NULL; | |
1324 | const char *filename; | |
debfb917 | 1325 | int i, ret = 0; |
c589b249 | 1326 | |
87ea75d5 | 1327 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
60beb341 | 1328 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 1329 | if (local_err) { |
f2917853 | 1330 | error_propagate(errp, local_err); |
60beb341 KW |
1331 | ret = -EINVAL; |
1332 | goto out; | |
1333 | } | |
1334 | ||
1335 | filename = qemu_opt_get(opts, "filename"); | |
1336 | ||
c589b249 RS |
1337 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1338 | if (iscsi_url == NULL) { | |
f2917853 | 1339 | error_setg(errp, "Failed to parse URL : %s", filename); |
c589b249 | 1340 | ret = -EINVAL; |
b93c94f7 | 1341 | goto out; |
c589b249 RS |
1342 | } |
1343 | ||
f9dadc98 RS |
1344 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1345 | ||
1346 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1347 | ||
1348 | iscsi = iscsi_create_context(initiator_name); | |
1349 | if (iscsi == NULL) { | |
f2917853 | 1350 | error_setg(errp, "iSCSI: Failed to create iSCSI context."); |
f9dadc98 | 1351 | ret = -ENOMEM; |
b93c94f7 | 1352 | goto out; |
f9dadc98 RS |
1353 | } |
1354 | ||
c589b249 | 1355 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
f2917853 | 1356 | error_setg(errp, "iSCSI: Failed to set target name."); |
c589b249 | 1357 | ret = -EINVAL; |
b93c94f7 | 1358 | goto out; |
c589b249 RS |
1359 | } |
1360 | ||
532cee41 | 1361 | if (iscsi_url->user[0] != '\0') { |
c589b249 RS |
1362 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, |
1363 | iscsi_url->passwd); | |
1364 | if (ret != 0) { | |
f2917853 | 1365 | error_setg(errp, "Failed to set initiator username and password"); |
c589b249 | 1366 | ret = -EINVAL; |
b93c94f7 | 1367 | goto out; |
c589b249 RS |
1368 | } |
1369 | } | |
f9dadc98 RS |
1370 | |
1371 | /* check if we got CHAP username/password via the options */ | |
f2917853 PB |
1372 | parse_chap(iscsi, iscsi_url->target, &local_err); |
1373 | if (local_err != NULL) { | |
1374 | error_propagate(errp, local_err); | |
f9dadc98 | 1375 | ret = -EINVAL; |
b93c94f7 | 1376 | goto out; |
f9dadc98 RS |
1377 | } |
1378 | ||
c589b249 | 1379 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
f2917853 | 1380 | error_setg(errp, "iSCSI: Failed to set session type to normal."); |
c589b249 | 1381 | ret = -EINVAL; |
b93c94f7 | 1382 | goto out; |
c589b249 RS |
1383 | } |
1384 | ||
1385 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1386 | ||
f9dadc98 | 1387 | /* check if we got HEADER_DIGEST via the options */ |
f2917853 PB |
1388 | parse_header_digest(iscsi, iscsi_url->target, &local_err); |
1389 | if (local_err != NULL) { | |
1390 | error_propagate(errp, local_err); | |
1391 | ret = -EINVAL; | |
1392 | goto out; | |
1393 | } | |
f9dadc98 | 1394 | |
e829b0bb | 1395 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
f2917853 | 1396 | error_setg(errp, "iSCSI: Failed to connect to LUN : %s", |
e829b0bb PL |
1397 | iscsi_get_error(iscsi)); |
1398 | ret = -EINVAL; | |
1399 | goto out; | |
1400 | } | |
c589b249 RS |
1401 | |
1402 | iscsilun->iscsi = iscsi; | |
80cf6257 | 1403 | iscsilun->aio_context = bdrv_get_aio_context(bs); |
c589b249 | 1404 | iscsilun->lun = iscsi_url->lun; |
24d3bd67 | 1405 | iscsilun->has_write_same = true; |
c589b249 | 1406 | |
24d3bd67 PL |
1407 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0, |
1408 | (void **) &inq, errp); | |
1409 | if (task == NULL) { | |
c589b249 | 1410 | ret = -EINVAL; |
b93c94f7 | 1411 | goto out; |
c589b249 | 1412 | } |
e829b0bb | 1413 | iscsilun->type = inq->periperal_device_type; |
24d3bd67 PL |
1414 | scsi_free_scsi_task(task); |
1415 | task = NULL; | |
e829b0bb | 1416 | |
7191f208 PL |
1417 | iscsi_modesense_sync(iscsilun); |
1418 | ||
c1d4096b FZ |
1419 | /* Check the write protect flag of the LUN if we want to write */ |
1420 | if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) && | |
43ae8fb1 | 1421 | iscsilun->write_protected) { |
c1d4096b FZ |
1422 | error_setg(errp, "Cannot open a write protected LUN as read-write"); |
1423 | ret = -EACCES; | |
1424 | goto out; | |
1425 | } | |
1426 | ||
f2917853 PB |
1427 | iscsi_readcapacity_sync(iscsilun, &local_err); |
1428 | if (local_err != NULL) { | |
1429 | error_propagate(errp, local_err); | |
cd82b6fb | 1430 | ret = -EINVAL; |
cb1b83e7 | 1431 | goto out; |
e829b0bb | 1432 | } |
0777b5dd | 1433 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
2c9880c4 | 1434 | bs->request_alignment = iscsilun->block_size; |
e829b0bb | 1435 | |
f47c3f5a KW |
1436 | /* We don't have any emulation for devices other than disks and CD-ROMs, so |
1437 | * this must be sg ioctl compatible. We force it to be sg, otherwise qemu | |
1438 | * will try to read from the device to guess the image format. | |
622695a4 | 1439 | */ |
f47c3f5a | 1440 | if (iscsilun->type != TYPE_DISK && iscsilun->type != TYPE_ROM) { |
622695a4 RS |
1441 | bs->sg = 1; |
1442 | } | |
1443 | ||
24d3bd67 PL |
1444 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, |
1445 | SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES, | |
1446 | (void **) &inq_vpd, errp); | |
1447 | if (task == NULL) { | |
1448 | ret = -EINVAL; | |
1449 | goto out; | |
f18a7cbb | 1450 | } |
24d3bd67 PL |
1451 | for (i = 0; i < inq_vpd->num_pages; i++) { |
1452 | struct scsi_task *inq_task; | |
1453 | struct scsi_inquiry_logical_block_provisioning *inq_lbp; | |
f18a7cbb | 1454 | struct scsi_inquiry_block_limits *inq_bl; |
24d3bd67 PL |
1455 | switch (inq_vpd->pages[i]) { |
1456 | case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING: | |
1457 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1458 | SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING, | |
1459 | (void **) &inq_lbp, errp); | |
1460 | if (inq_task == NULL) { | |
1461 | ret = -EINVAL; | |
1462 | goto out; | |
1463 | } | |
1464 | memcpy(&iscsilun->lbp, inq_lbp, | |
1465 | sizeof(struct scsi_inquiry_logical_block_provisioning)); | |
1466 | scsi_free_scsi_task(inq_task); | |
1467 | break; | |
1468 | case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS: | |
1469 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1470 | SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS, | |
1471 | (void **) &inq_bl, errp); | |
1472 | if (inq_task == NULL) { | |
1473 | ret = -EINVAL; | |
1474 | goto out; | |
1475 | } | |
1476 | memcpy(&iscsilun->bl, inq_bl, | |
1477 | sizeof(struct scsi_inquiry_block_limits)); | |
1478 | scsi_free_scsi_task(inq_task); | |
1479 | break; | |
1480 | default: | |
1481 | break; | |
f18a7cbb | 1482 | } |
f18a7cbb | 1483 | } |
24d3bd67 PL |
1484 | scsi_free_scsi_task(task); |
1485 | task = NULL; | |
f18a7cbb | 1486 | |
80cf6257 | 1487 | iscsi_attach_aio_context(bs, iscsilun->aio_context); |
5b5d34ec | 1488 | |
b03c3805 PL |
1489 | /* Guess the internal cluster (page) size of the iscsi target by the means |
1490 | * of opt_unmap_gran. Transfer the unmap granularity only if it has a | |
1491 | * reasonable size */ | |
3d2acaa3 | 1492 | if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 && |
b03c3805 PL |
1493 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { |
1494 | iscsilun->cluster_sectors = (iscsilun->bl.opt_unmap_gran * | |
1495 | iscsilun->block_size) >> BDRV_SECTOR_BITS; | |
9eac3622 | 1496 | if (iscsilun->lbprz) { |
a9fe4c95 PL |
1497 | iscsilun->allocationmap = iscsi_allocationmap_init(iscsilun); |
1498 | if (iscsilun->allocationmap == NULL) { | |
1499 | ret = -ENOMEM; | |
1500 | } | |
b03c3805 | 1501 | } |
b03c3805 PL |
1502 | } |
1503 | ||
b93c94f7 | 1504 | out: |
60beb341 | 1505 | qemu_opts_del(opts); |
f7047c2d | 1506 | g_free(initiator_name); |
c589b249 RS |
1507 | if (iscsi_url != NULL) { |
1508 | iscsi_destroy_url(iscsi_url); | |
1509 | } | |
e829b0bb PL |
1510 | if (task != NULL) { |
1511 | scsi_free_scsi_task(task); | |
1512 | } | |
b93c94f7 PB |
1513 | |
1514 | if (ret) { | |
1515 | if (iscsi != NULL) { | |
20474e9a PL |
1516 | if (iscsi_is_logged_in(iscsi)) { |
1517 | iscsi_logout_sync(iscsi); | |
1518 | } | |
b93c94f7 PB |
1519 | iscsi_destroy_context(iscsi); |
1520 | } | |
1521 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1522 | } |
c589b249 RS |
1523 | return ret; |
1524 | } | |
1525 | ||
1526 | static void iscsi_close(BlockDriverState *bs) | |
1527 | { | |
1528 | IscsiLun *iscsilun = bs->opaque; | |
1529 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1530 | ||
80cf6257 | 1531 | iscsi_detach_aio_context(bs); |
20474e9a PL |
1532 | if (iscsi_is_logged_in(iscsi)) { |
1533 | iscsi_logout_sync(iscsi); | |
1534 | } | |
c589b249 | 1535 | iscsi_destroy_context(iscsi); |
d4cd9615 | 1536 | g_free(iscsilun->zeroblock); |
b03c3805 | 1537 | g_free(iscsilun->allocationmap); |
c589b249 RS |
1538 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1539 | } | |
1540 | ||
52f6fa14 | 1541 | static int sector_limits_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
d34682cd | 1542 | { |
52f6fa14 PL |
1543 | return MIN(sector_lun2qemu(sector, iscsilun), INT_MAX / 2 + 1); |
1544 | } | |
d34682cd | 1545 | |
52f6fa14 PL |
1546 | static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp) |
1547 | { | |
d34682cd KW |
1548 | /* We don't actually refresh here, but just return data queried in |
1549 | * iscsi_open(): iscsi targets don't change their limits. */ | |
52f6fa14 PL |
1550 | |
1551 | IscsiLun *iscsilun = bs->opaque; | |
1552 | uint32_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff; | |
1553 | ||
1554 | if (iscsilun->bl.max_xfer_len) { | |
1555 | max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len); | |
1556 | } | |
1557 | ||
1558 | bs->bl.max_transfer_length = sector_limits_lun2qemu(max_xfer_len, iscsilun); | |
1559 | ||
c97ca29d | 1560 | if (iscsilun->lbp.lbpu) { |
d34682cd | 1561 | if (iscsilun->bl.max_unmap < 0xffffffff) { |
3dab1551 PL |
1562 | bs->bl.max_discard = |
1563 | sector_limits_lun2qemu(iscsilun->bl.max_unmap, iscsilun); | |
d34682cd | 1564 | } |
3dab1551 PL |
1565 | bs->bl.discard_alignment = |
1566 | sector_limits_lun2qemu(iscsilun->bl.opt_unmap_gran, iscsilun); | |
c97ca29d | 1567 | } |
d34682cd | 1568 | |
c97ca29d | 1569 | if (iscsilun->bl.max_ws_len < 0xffffffff) { |
3dab1551 PL |
1570 | bs->bl.max_write_zeroes = |
1571 | sector_limits_lun2qemu(iscsilun->bl.max_ws_len, iscsilun); | |
c97ca29d PB |
1572 | } |
1573 | if (iscsilun->lbp.lbpws) { | |
3dab1551 PL |
1574 | bs->bl.write_zeroes_alignment = |
1575 | sector_limits_lun2qemu(iscsilun->bl.opt_unmap_gran, iscsilun); | |
d34682cd | 1576 | } |
3dab1551 PL |
1577 | bs->bl.opt_transfer_length = |
1578 | sector_limits_lun2qemu(iscsilun->bl.opt_xfer_len, iscsilun); | |
e9f526ab | 1579 | } |
d34682cd | 1580 | |
43ae8fb1 FZ |
1581 | /* Note that this will not re-establish a connection with an iSCSI target - it |
1582 | * is effectively a NOP. */ | |
dc6afb99 JC |
1583 | static int iscsi_reopen_prepare(BDRVReopenState *state, |
1584 | BlockReopenQueue *queue, Error **errp) | |
1585 | { | |
43ae8fb1 FZ |
1586 | IscsiLun *iscsilun = state->bs->opaque; |
1587 | ||
1588 | if (state->flags & BDRV_O_RDWR && iscsilun->write_protected) { | |
1589 | error_setg(errp, "Cannot open a write protected LUN as read-write"); | |
1590 | return -EACCES; | |
1591 | } | |
d34682cd KW |
1592 | return 0; |
1593 | } | |
1594 | ||
cb1b83e7 PL |
1595 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1596 | { | |
1597 | IscsiLun *iscsilun = bs->opaque; | |
f2917853 | 1598 | Error *local_err = NULL; |
cb1b83e7 PL |
1599 | |
1600 | if (iscsilun->type != TYPE_DISK) { | |
1601 | return -ENOTSUP; | |
1602 | } | |
1603 | ||
f2917853 PB |
1604 | iscsi_readcapacity_sync(iscsilun, &local_err); |
1605 | if (local_err != NULL) { | |
1606 | error_free(local_err); | |
1607 | return -EIO; | |
cb1b83e7 PL |
1608 | } |
1609 | ||
1610 | if (offset > iscsi_getlength(bs)) { | |
1611 | return -EINVAL; | |
1612 | } | |
1613 | ||
b03c3805 PL |
1614 | if (iscsilun->allocationmap != NULL) { |
1615 | g_free(iscsilun->allocationmap); | |
a9fe4c95 | 1616 | iscsilun->allocationmap = iscsi_allocationmap_init(iscsilun); |
b03c3805 PL |
1617 | } |
1618 | ||
cb1b83e7 PL |
1619 | return 0; |
1620 | } | |
1621 | ||
a59479e3 | 1622 | static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp) |
de8864e5 PL |
1623 | { |
1624 | int ret = 0; | |
1625 | int64_t total_size = 0; | |
13c91cb7 | 1626 | BlockDriverState *bs; |
de8864e5 | 1627 | IscsiLun *iscsilun = NULL; |
60beb341 | 1628 | QDict *bs_options; |
de8864e5 | 1629 | |
e4e9986b | 1630 | bs = bdrv_new(); |
de8864e5 PL |
1631 | |
1632 | /* Read out options */ | |
c2eb918e HT |
1633 | total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
1634 | BDRV_SECTOR_SIZE); | |
5839e53b | 1635 | bs->opaque = g_new0(struct IscsiLun, 1); |
13c91cb7 | 1636 | iscsilun = bs->opaque; |
de8864e5 | 1637 | |
60beb341 KW |
1638 | bs_options = qdict_new(); |
1639 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
015a1036 | 1640 | ret = iscsi_open(bs, bs_options, 0, NULL); |
60beb341 KW |
1641 | QDECREF(bs_options); |
1642 | ||
de8864e5 PL |
1643 | if (ret != 0) { |
1644 | goto out; | |
1645 | } | |
80cf6257 | 1646 | iscsi_detach_aio_context(bs); |
de8864e5 PL |
1647 | if (iscsilun->type != TYPE_DISK) { |
1648 | ret = -ENODEV; | |
1649 | goto out; | |
1650 | } | |
13c91cb7 | 1651 | if (bs->total_sectors < total_size) { |
de8864e5 | 1652 | ret = -ENOSPC; |
d3bda7bc | 1653 | goto out; |
de8864e5 PL |
1654 | } |
1655 | ||
1656 | ret = 0; | |
1657 | out: | |
1658 | if (iscsilun->iscsi != NULL) { | |
1659 | iscsi_destroy_context(iscsilun->iscsi); | |
1660 | } | |
13c91cb7 FZ |
1661 | g_free(bs->opaque); |
1662 | bs->opaque = NULL; | |
4f6fd349 | 1663 | bdrv_unref(bs); |
de8864e5 PL |
1664 | return ret; |
1665 | } | |
1666 | ||
186d4f2b PL |
1667 | static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
1668 | { | |
1669 | IscsiLun *iscsilun = bs->opaque; | |
0a386e48 | 1670 | bdi->unallocated_blocks_are_zero = iscsilun->lbprz; |
186d4f2b | 1671 | bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; |
b03c3805 | 1672 | bdi->cluster_size = iscsilun->cluster_sectors * BDRV_SECTOR_SIZE; |
186d4f2b PL |
1673 | return 0; |
1674 | } | |
1675 | ||
a59479e3 CL |
1676 | static QemuOptsList iscsi_create_opts = { |
1677 | .name = "iscsi-create-opts", | |
1678 | .head = QTAILQ_HEAD_INITIALIZER(iscsi_create_opts.head), | |
1679 | .desc = { | |
1680 | { | |
1681 | .name = BLOCK_OPT_SIZE, | |
1682 | .type = QEMU_OPT_SIZE, | |
1683 | .help = "Virtual disk size" | |
1684 | }, | |
1685 | { /* end of list */ } | |
1686 | } | |
de8864e5 PL |
1687 | }; |
1688 | ||
c589b249 RS |
1689 | static BlockDriver bdrv_iscsi = { |
1690 | .format_name = "iscsi", | |
1691 | .protocol_name = "iscsi", | |
1692 | ||
1693 | .instance_size = sizeof(IscsiLun), | |
030be321 | 1694 | .bdrv_needs_filename = true, |
c589b249 RS |
1695 | .bdrv_file_open = iscsi_open, |
1696 | .bdrv_close = iscsi_close, | |
c282e1fd | 1697 | .bdrv_create = iscsi_create, |
a59479e3 | 1698 | .create_opts = &iscsi_create_opts, |
dc6afb99 | 1699 | .bdrv_reopen_prepare = iscsi_reopen_prepare, |
c589b249 RS |
1700 | |
1701 | .bdrv_getlength = iscsi_getlength, | |
186d4f2b | 1702 | .bdrv_get_info = iscsi_get_info, |
cb1b83e7 | 1703 | .bdrv_truncate = iscsi_truncate, |
d34682cd | 1704 | .bdrv_refresh_limits = iscsi_refresh_limits, |
c589b249 | 1705 | |
54a5c1d5 | 1706 | .bdrv_co_get_block_status = iscsi_co_get_block_status, |
65f3e339 | 1707 | .bdrv_co_discard = iscsi_co_discard, |
d4cd9615 | 1708 | .bdrv_co_write_zeroes = iscsi_co_write_zeroes, |
063c3378 PL |
1709 | .bdrv_co_readv = iscsi_co_readv, |
1710 | .bdrv_co_writev = iscsi_co_writev, | |
1711 | .bdrv_co_flush_to_disk = iscsi_co_flush, | |
fa6acb0c | 1712 | |
98392453 RS |
1713 | #ifdef __linux__ |
1714 | .bdrv_ioctl = iscsi_ioctl, | |
1715 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1716 | #endif | |
80cf6257 SH |
1717 | |
1718 | .bdrv_detach_aio_context = iscsi_detach_aio_context, | |
1719 | .bdrv_attach_aio_context = iscsi_attach_aio_context, | |
c589b249 RS |
1720 | }; |
1721 | ||
4d454574 PB |
1722 | static QemuOptsList qemu_iscsi_opts = { |
1723 | .name = "iscsi", | |
1724 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1725 | .desc = { | |
1726 | { | |
1727 | .name = "user", | |
1728 | .type = QEMU_OPT_STRING, | |
1729 | .help = "username for CHAP authentication to target", | |
1730 | },{ | |
1731 | .name = "password", | |
1732 | .type = QEMU_OPT_STRING, | |
1733 | .help = "password for CHAP authentication to target", | |
1734 | },{ | |
1735 | .name = "header-digest", | |
1736 | .type = QEMU_OPT_STRING, | |
1737 | .help = "HeaderDigest setting. " | |
1738 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1739 | },{ | |
1740 | .name = "initiator-name", | |
1741 | .type = QEMU_OPT_STRING, | |
1742 | .help = "Initiator iqn name to use when connecting", | |
1743 | }, | |
1744 | { /* end of list */ } | |
1745 | }, | |
1746 | }; | |
1747 | ||
c589b249 RS |
1748 | static void iscsi_block_init(void) |
1749 | { | |
1750 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1751 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1752 | } |
1753 | ||
1754 | block_init(iscsi_block_init); |