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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> | |
aef172ff | 5 | * Copyright (c) 2012-2017 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 | ||
80c71a24 | 26 | #include "qemu/osdep.h" |
c589b249 RS |
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" |
08e2c9f1 | 37 | #include "scsi/constants.h" |
0a53f010 | 38 | #include "qemu/iov.h" |
cea25275 | 39 | #include "qemu/uuid.h" |
5accc840 | 40 | #include "qmp-commands.h" |
d49b6836 | 41 | #include "qapi/qmp/qstring.h" |
b189346e | 42 | #include "crypto/secret.h" |
e5b5728c | 43 | #include "scsi/utils.h" |
c589b249 | 44 | |
e5b5728c PB |
45 | /* Conflict between scsi/utils.h and libiscsi! :( */ |
46 | #define SCSI_XFER_NONE ISCSI_XFER_NONE | |
c589b249 RS |
47 | #include <iscsi/iscsi.h> |
48 | #include <iscsi/scsi-lowlevel.h> | |
e5b5728c PB |
49 | #undef SCSI_XFER_NONE |
50 | QEMU_BUILD_BUG_ON((int)SCSI_XFER_NONE != (int)ISCSI_XFER_NONE); | |
c589b249 | 51 | |
98392453 RS |
52 | #ifdef __linux__ |
53 | #include <scsi/sg.h> | |
98392453 | 54 | #endif |
c589b249 RS |
55 | |
56 | typedef struct IscsiLun { | |
57 | struct iscsi_context *iscsi; | |
80cf6257 | 58 | AioContext *aio_context; |
c589b249 | 59 | int lun; |
dbfff6d7 | 60 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 61 | int block_size; |
c7b4a952 | 62 | uint64_t num_blocks; |
c9b9f682 | 63 | int events; |
5b5d34ec | 64 | QEMUTimer *nop_timer; |
05b685fb | 65 | QEMUTimer *event_timer; |
d045c466 | 66 | QemuMutex mutex; |
f18a7cbb PL |
67 | struct scsi_inquiry_logical_block_provisioning lbp; |
68 | struct scsi_inquiry_block_limits bl; | |
d4cd9615 | 69 | unsigned char *zeroblock; |
e1123a3b PL |
70 | /* The allocmap tracks which clusters (pages) on the iSCSI target are |
71 | * allocated and which are not. In case a target returns zeros for | |
72 | * unallocated pages (iscsilun->lprz) we can directly return zeros instead | |
73 | * of reading zeros over the wire if a read request falls within an | |
74 | * unallocated block. As there are 3 possible states we need 2 bitmaps to | |
75 | * track. allocmap_valid keeps track if QEMU's information about a page is | |
76 | * valid. allocmap tracks if a page is allocated or not. In case QEMU has no | |
77 | * valid information about a page the corresponding allocmap entry should be | |
78 | * switched to unallocated as well to force a new lookup of the allocation | |
79 | * status as lookups are generally skipped if a page is suspect to be | |
80 | * allocated. If a iSCSI target is opened with cache.direct = on the | |
81 | * allocmap_valid does not exist turning all cached information invalid so | |
82 | * that a fresh lookup is made for any page even if allocmap entry returns | |
83 | * it's unallocated. */ | |
84 | unsigned long *allocmap; | |
85 | unsigned long *allocmap_valid; | |
86 | long allocmap_size; | |
b03c3805 | 87 | int cluster_sectors; |
9281fe9e | 88 | bool use_16_for_rw; |
43ae8fb1 | 89 | bool write_protected; |
0a386e48 PL |
90 | bool lbpme; |
91 | bool lbprz; | |
752ce451 | 92 | bool dpofua; |
0a386e48 | 93 | bool has_write_same; |
5dd7a535 | 94 | bool request_timed_out; |
c589b249 RS |
95 | } IscsiLun; |
96 | ||
54a5c1d5 PL |
97 | typedef struct IscsiTask { |
98 | int status; | |
99 | int complete; | |
100 | int retries; | |
101 | int do_retry; | |
102 | struct scsi_task *task; | |
103 | Coroutine *co; | |
80cf6257 | 104 | IscsiLun *iscsilun; |
efc6de0d | 105 | QEMUTimer retry_timer; |
e01dd3da | 106 | int err_code; |
e38bc234 | 107 | char *err_str; |
54a5c1d5 PL |
108 | } IscsiTask; |
109 | ||
c589b249 | 110 | typedef struct IscsiAIOCB { |
7c84b1b8 | 111 | BlockAIOCB common; |
c589b249 RS |
112 | QEMUBH *bh; |
113 | IscsiLun *iscsilun; | |
114 | struct scsi_task *task; | |
115 | uint8_t *buf; | |
116 | int status; | |
1dde716e PL |
117 | int64_t sector_num; |
118 | int nb_sectors; | |
4bb17ab5 | 119 | int ret; |
98392453 RS |
120 | #ifdef __linux__ |
121 | sg_io_hdr_t *ioh; | |
122 | #endif | |
c589b249 RS |
123 | } IscsiAIOCB; |
124 | ||
5dd7a535 PL |
125 | /* libiscsi uses time_t so its enough to process events every second */ |
126 | #define EVENT_INTERVAL 1000 | |
5b5d34ec PL |
127 | #define NOP_INTERVAL 5000 |
128 | #define MAX_NOP_FAILURES 3 | |
efc6de0d | 129 | #define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times) |
59dd0a22 | 130 | static const unsigned iscsi_retry_times[] = {8, 32, 128, 512, 2048, 8192, 32768}; |
5b5d34ec | 131 | |
5d831be2 | 132 | /* this threshold is a trade-off knob to choose between |
5917af81 PL |
133 | * the potential additional overhead of an extra GET_LBA_STATUS request |
134 | * vs. unnecessarily reading a lot of zero sectors over the wire. | |
135 | * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES | |
136 | * sectors we check the allocation status of the area covered by the | |
137 | * request first if the allocationmap indicates that the area might be | |
138 | * unallocated. */ | |
139 | #define ISCSI_CHECKALLOC_THRES 64 | |
5b5d34ec | 140 | |
27cbd828 | 141 | static void |
cfb3f506 | 142 | iscsi_bh_cb(void *p) |
27cbd828 PB |
143 | { |
144 | IscsiAIOCB *acb = p; | |
145 | ||
146 | qemu_bh_delete(acb->bh); | |
147 | ||
4790b03d PB |
148 | g_free(acb->buf); |
149 | acb->buf = NULL; | |
150 | ||
722d9333 | 151 | acb->common.cb(acb->common.opaque, acb->status); |
27cbd828 | 152 | |
1bd075f2 PB |
153 | if (acb->task != NULL) { |
154 | scsi_free_scsi_task(acb->task); | |
155 | acb->task = NULL; | |
156 | } | |
157 | ||
8007429a | 158 | qemu_aio_unref(acb); |
27cbd828 PB |
159 | } |
160 | ||
cfb3f506 PB |
161 | static void |
162 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 163 | { |
1bd075f2 PB |
164 | if (acb->bh) { |
165 | return; | |
166 | } | |
80cf6257 | 167 | acb->bh = aio_bh_new(acb->iscsilun->aio_context, iscsi_bh_cb, acb); |
27cbd828 | 168 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
169 | } |
170 | ||
8b9dfe90 PL |
171 | static void iscsi_co_generic_bh_cb(void *opaque) |
172 | { | |
173 | struct IscsiTask *iTask = opaque; | |
1919631e | 174 | |
fcd470d8 | 175 | iTask->complete = 1; |
1919631e | 176 | aio_co_wake(iTask->co); |
8b9dfe90 PL |
177 | } |
178 | ||
efc6de0d PL |
179 | static void iscsi_retry_timer_expired(void *opaque) |
180 | { | |
181 | struct IscsiTask *iTask = opaque; | |
fcd470d8 | 182 | iTask->complete = 1; |
efc6de0d | 183 | if (iTask->co) { |
2f47da5f | 184 | aio_co_wake(iTask->co); |
efc6de0d PL |
185 | } |
186 | } | |
187 | ||
188 | static inline unsigned exp_random(double mean) | |
189 | { | |
190 | return -mean * log((double)rand() / RAND_MAX); | |
191 | } | |
192 | ||
e01dd3da FZ |
193 | /* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in |
194 | * libiscsi 1.10.0, together with other constants we need. Use it as | |
195 | * a hint that we have to define them ourselves if needed, to keep the | |
196 | * minimum required libiscsi version at 1.9.0. We use an ASCQ macro for | |
197 | * the test because SCSI_STATUS_* is an enum. | |
198 | * | |
199 | * To guard against future changes where SCSI_SENSE_ASCQ_* also becomes | |
200 | * an enum, check against the LIBISCSI_API_VERSION macro, which was | |
201 | * introduced in 1.11.0. If it is present, there is no need to define | |
202 | * anything. | |
203 | */ | |
204 | #if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \ | |
205 | !defined(LIBISCSI_API_VERSION) | |
206 | #define SCSI_STATUS_TASK_SET_FULL 0x28 | |
207 | #define SCSI_STATUS_TIMEOUT 0x0f000002 | |
208 | #define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600 | |
209 | #define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00 | |
9049736e PL |
210 | #endif |
211 | ||
583ec22e RS |
212 | #ifndef LIBISCSI_API_VERSION |
213 | #define LIBISCSI_API_VERSION 20130701 | |
214 | #endif | |
215 | ||
e01dd3da FZ |
216 | static int iscsi_translate_sense(struct scsi_sense *sense) |
217 | { | |
28751358 FZ |
218 | return - scsi_sense_to_errno(sense->key, |
219 | (sense->ascq & 0xFF00) >> 8, | |
220 | sense->ascq & 0xFF); | |
e01dd3da FZ |
221 | } |
222 | ||
d045c466 | 223 | /* Called (via iscsi_service) with QemuMutex held. */ |
54a5c1d5 PL |
224 | static void |
225 | iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, | |
226 | void *command_data, void *opaque) | |
227 | { | |
228 | struct IscsiTask *iTask = opaque; | |
229 | struct scsi_task *task = command_data; | |
230 | ||
54a5c1d5 PL |
231 | iTask->status = status; |
232 | iTask->do_retry = 0; | |
233 | iTask->task = task; | |
234 | ||
54a5c1d5 | 235 | if (status != SCSI_STATUS_GOOD) { |
efc6de0d PL |
236 | if (iTask->retries++ < ISCSI_CMD_RETRIES) { |
237 | if (status == SCSI_STATUS_CHECK_CONDITION | |
238 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
239 | error_report("iSCSI CheckCondition: %s", | |
240 | iscsi_get_error(iscsi)); | |
241 | iTask->do_retry = 1; | |
242 | goto out; | |
243 | } | |
9049736e | 244 | if (status == SCSI_STATUS_BUSY || |
e01dd3da FZ |
245 | status == SCSI_STATUS_TIMEOUT || |
246 | status == SCSI_STATUS_TASK_SET_FULL) { | |
efc6de0d PL |
247 | unsigned retry_time = |
248 | exp_random(iscsi_retry_times[iTask->retries - 1]); | |
e01dd3da | 249 | if (status == SCSI_STATUS_TIMEOUT) { |
5dd7a535 PL |
250 | /* make sure the request is rescheduled AFTER the |
251 | * reconnect is initiated */ | |
252 | retry_time = EVENT_INTERVAL * 2; | |
253 | iTask->iscsilun->request_timed_out = true; | |
254 | } | |
255 | error_report("iSCSI Busy/TaskSetFull/TimeOut" | |
256 | " (retry #%u in %u ms): %s", | |
efc6de0d PL |
257 | iTask->retries, retry_time, |
258 | iscsi_get_error(iscsi)); | |
259 | aio_timer_init(iTask->iscsilun->aio_context, | |
260 | &iTask->retry_timer, QEMU_CLOCK_REALTIME, | |
261 | SCALE_MS, iscsi_retry_timer_expired, iTask); | |
262 | timer_mod(&iTask->retry_timer, | |
263 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + retry_time); | |
264 | iTask->do_retry = 1; | |
265 | return; | |
266 | } | |
267 | } | |
e01dd3da | 268 | iTask->err_code = iscsi_translate_sense(&task->sense); |
e38bc234 | 269 | iTask->err_str = g_strdup(iscsi_get_error(iscsi)); |
54a5c1d5 PL |
270 | } |
271 | ||
272 | out: | |
273 | if (iTask->co) { | |
fffb6e12 PB |
274 | aio_bh_schedule_oneshot(iTask->iscsilun->aio_context, |
275 | iscsi_co_generic_bh_cb, iTask); | |
fcd470d8 PL |
276 | } else { |
277 | iTask->complete = 1; | |
54a5c1d5 PL |
278 | } |
279 | } | |
280 | ||
281 | static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) | |
282 | { | |
283 | *iTask = (struct IscsiTask) { | |
efc6de0d | 284 | .co = qemu_coroutine_self(), |
efc6de0d | 285 | .iscsilun = iscsilun, |
54a5c1d5 PL |
286 | }; |
287 | } | |
27cbd828 | 288 | |
c589b249 RS |
289 | static void |
290 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
291 | void *private_data) | |
292 | { | |
1bd075f2 PB |
293 | IscsiAIOCB *acb = private_data; |
294 | ||
295 | acb->status = -ECANCELED; | |
296 | iscsi_schedule_bh(acb); | |
c589b249 RS |
297 | } |
298 | ||
299 | static void | |
7c84b1b8 | 300 | iscsi_aio_cancel(BlockAIOCB *blockacb) |
c589b249 RS |
301 | { |
302 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
303 | IscsiLun *iscsilun = acb->iscsilun; | |
304 | ||
1bd075f2 PB |
305 | if (acb->status != -EINPROGRESS) { |
306 | return; | |
307 | } | |
308 | ||
b2090919 | 309 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 310 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 311 | iscsi_abort_task_cb, acb); |
b2090919 | 312 | |
c589b249 RS |
313 | } |
314 | ||
d7331bed | 315 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 | 316 | .aiocb_size = sizeof(IscsiAIOCB), |
722d9333 | 317 | .cancel_async = iscsi_aio_cancel, |
c589b249 RS |
318 | }; |
319 | ||
320 | ||
321 | static void iscsi_process_read(void *arg); | |
322 | static void iscsi_process_write(void *arg); | |
323 | ||
d045c466 | 324 | /* Called with QemuMutex held. */ |
c589b249 RS |
325 | static void |
326 | iscsi_set_events(IscsiLun *iscsilun) | |
327 | { | |
328 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
05b685fb | 329 | int ev = iscsi_which_events(iscsi); |
c9b9f682 | 330 | |
c9b9f682 | 331 | if (ev != iscsilun->events) { |
dca21ef2 FZ |
332 | aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsi), |
333 | false, | |
05b685fb | 334 | (ev & POLLIN) ? iscsi_process_read : NULL, |
80cf6257 | 335 | (ev & POLLOUT) ? iscsi_process_write : NULL, |
f6a51c84 | 336 | NULL, |
80cf6257 | 337 | iscsilun); |
05b685fb PL |
338 | iscsilun->events = ev; |
339 | } | |
05b685fb | 340 | } |
c9b9f682 | 341 | |
5dd7a535 | 342 | static void iscsi_timed_check_events(void *opaque) |
05b685fb PL |
343 | { |
344 | IscsiLun *iscsilun = opaque; | |
5dd7a535 PL |
345 | |
346 | /* check for timed out requests */ | |
347 | iscsi_service(iscsilun->iscsi, 0); | |
348 | ||
349 | if (iscsilun->request_timed_out) { | |
350 | iscsilun->request_timed_out = false; | |
351 | iscsi_reconnect(iscsilun->iscsi); | |
352 | } | |
353 | ||
354 | /* newer versions of libiscsi may return zero events. Ensure we are able | |
355 | * to return to service once this situation changes. */ | |
05b685fb | 356 | iscsi_set_events(iscsilun); |
5dd7a535 PL |
357 | |
358 | timer_mod(iscsilun->event_timer, | |
359 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); | |
c589b249 RS |
360 | } |
361 | ||
362 | static void | |
363 | iscsi_process_read(void *arg) | |
364 | { | |
365 | IscsiLun *iscsilun = arg; | |
366 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
367 | ||
d045c466 | 368 | qemu_mutex_lock(&iscsilun->mutex); |
c589b249 RS |
369 | iscsi_service(iscsi, POLLIN); |
370 | iscsi_set_events(iscsilun); | |
d045c466 | 371 | qemu_mutex_unlock(&iscsilun->mutex); |
c589b249 RS |
372 | } |
373 | ||
374 | static void | |
375 | iscsi_process_write(void *arg) | |
376 | { | |
377 | IscsiLun *iscsilun = arg; | |
378 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
379 | ||
d045c466 | 380 | qemu_mutex_lock(&iscsilun->mutex); |
c589b249 RS |
381 | iscsi_service(iscsi, POLLOUT); |
382 | iscsi_set_events(iscsilun); | |
d045c466 | 383 | qemu_mutex_unlock(&iscsilun->mutex); |
c589b249 RS |
384 | } |
385 | ||
0777b5dd PL |
386 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
387 | { | |
388 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
389 | } | |
390 | ||
c589b249 RS |
391 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
392 | { | |
393 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
394 | } | |
395 | ||
94d047a3 EB |
396 | static bool is_byte_request_lun_aligned(int64_t offset, int count, |
397 | IscsiLun *iscsilun) | |
91bea4e2 | 398 | { |
94d047a3 EB |
399 | if (offset % iscsilun->block_size || count % iscsilun->block_size) { |
400 | error_report("iSCSI misaligned request: " | |
401 | "iscsilun->block_size %u, offset %" PRIi64 | |
402 | ", count %d", | |
403 | iscsilun->block_size, offset, count); | |
404 | return false; | |
405 | } | |
406 | return true; | |
407 | } | |
408 | ||
409 | static bool is_sector_request_lun_aligned(int64_t sector_num, int nb_sectors, | |
410 | IscsiLun *iscsilun) | |
411 | { | |
0ead9312 | 412 | assert(nb_sectors <= BDRV_REQUEST_MAX_SECTORS); |
94d047a3 EB |
413 | return is_byte_request_lun_aligned(sector_num << BDRV_SECTOR_BITS, |
414 | nb_sectors << BDRV_SECTOR_BITS, | |
415 | iscsilun); | |
91bea4e2 PL |
416 | } |
417 | ||
e1123a3b | 418 | static void iscsi_allocmap_free(IscsiLun *iscsilun) |
a9fe4c95 | 419 | { |
e1123a3b PL |
420 | g_free(iscsilun->allocmap); |
421 | g_free(iscsilun->allocmap_valid); | |
422 | iscsilun->allocmap = NULL; | |
423 | iscsilun->allocmap_valid = NULL; | |
a9fe4c95 PL |
424 | } |
425 | ||
e1123a3b PL |
426 | |
427 | static int iscsi_allocmap_init(IscsiLun *iscsilun, int open_flags) | |
b03c3805 | 428 | { |
e1123a3b PL |
429 | iscsi_allocmap_free(iscsilun); |
430 | ||
431 | iscsilun->allocmap_size = | |
432 | DIV_ROUND_UP(sector_lun2qemu(iscsilun->num_blocks, iscsilun), | |
433 | iscsilun->cluster_sectors); | |
434 | ||
435 | iscsilun->allocmap = bitmap_try_new(iscsilun->allocmap_size); | |
436 | if (!iscsilun->allocmap) { | |
437 | return -ENOMEM; | |
b03c3805 | 438 | } |
e1123a3b PL |
439 | |
440 | if (open_flags & BDRV_O_NOCACHE) { | |
441 | /* in case that cache.direct = on all allocmap entries are | |
442 | * treated as invalid to force a relookup of the block | |
443 | * status on every read request */ | |
444 | return 0; | |
445 | } | |
446 | ||
447 | iscsilun->allocmap_valid = bitmap_try_new(iscsilun->allocmap_size); | |
448 | if (!iscsilun->allocmap_valid) { | |
449 | /* if we are under memory pressure free the allocmap as well */ | |
450 | iscsi_allocmap_free(iscsilun); | |
451 | return -ENOMEM; | |
452 | } | |
453 | ||
454 | return 0; | |
b03c3805 PL |
455 | } |
456 | ||
e1123a3b PL |
457 | static void |
458 | iscsi_allocmap_update(IscsiLun *iscsilun, int64_t sector_num, | |
459 | int nb_sectors, bool allocated, bool valid) | |
b03c3805 | 460 | { |
e1123a3b PL |
461 | int64_t cl_num_expanded, nb_cls_expanded, cl_num_shrunk, nb_cls_shrunk; |
462 | ||
463 | if (iscsilun->allocmap == NULL) { | |
b03c3805 PL |
464 | return; |
465 | } | |
e1123a3b PL |
466 | /* expand to entirely contain all affected clusters */ |
467 | cl_num_expanded = sector_num / iscsilun->cluster_sectors; | |
468 | nb_cls_expanded = DIV_ROUND_UP(sector_num + nb_sectors, | |
469 | iscsilun->cluster_sectors) - cl_num_expanded; | |
470 | /* shrink to touch only completely contained clusters */ | |
471 | cl_num_shrunk = DIV_ROUND_UP(sector_num, iscsilun->cluster_sectors); | |
472 | nb_cls_shrunk = (sector_num + nb_sectors) / iscsilun->cluster_sectors | |
473 | - cl_num_shrunk; | |
474 | if (allocated) { | |
475 | bitmap_set(iscsilun->allocmap, cl_num_expanded, nb_cls_expanded); | |
476 | } else { | |
1da45e0c PL |
477 | if (nb_cls_shrunk > 0) { |
478 | bitmap_clear(iscsilun->allocmap, cl_num_shrunk, nb_cls_shrunk); | |
479 | } | |
e1123a3b PL |
480 | } |
481 | ||
482 | if (iscsilun->allocmap_valid == NULL) { | |
483 | return; | |
484 | } | |
485 | if (valid) { | |
1da45e0c PL |
486 | if (nb_cls_shrunk > 0) { |
487 | bitmap_set(iscsilun->allocmap_valid, cl_num_shrunk, nb_cls_shrunk); | |
488 | } | |
e1123a3b PL |
489 | } else { |
490 | bitmap_clear(iscsilun->allocmap_valid, cl_num_expanded, | |
491 | nb_cls_expanded); | |
492 | } | |
493 | } | |
494 | ||
495 | static void | |
496 | iscsi_allocmap_set_allocated(IscsiLun *iscsilun, int64_t sector_num, | |
497 | int nb_sectors) | |
498 | { | |
499 | iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, true, true); | |
500 | } | |
501 | ||
502 | static void | |
503 | iscsi_allocmap_set_unallocated(IscsiLun *iscsilun, int64_t sector_num, | |
504 | int nb_sectors) | |
505 | { | |
506 | /* Note: if cache.direct=on the fifth argument to iscsi_allocmap_update | |
507 | * is ignored, so this will in effect be an iscsi_allocmap_set_invalid. | |
508 | */ | |
509 | iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, true); | |
510 | } | |
511 | ||
512 | static void iscsi_allocmap_set_invalid(IscsiLun *iscsilun, int64_t sector_num, | |
513 | int nb_sectors) | |
514 | { | |
515 | iscsi_allocmap_update(iscsilun, sector_num, nb_sectors, false, false); | |
516 | } | |
517 | ||
518 | static void iscsi_allocmap_invalidate(IscsiLun *iscsilun) | |
519 | { | |
520 | if (iscsilun->allocmap) { | |
521 | bitmap_zero(iscsilun->allocmap, iscsilun->allocmap_size); | |
522 | } | |
523 | if (iscsilun->allocmap_valid) { | |
524 | bitmap_zero(iscsilun->allocmap_valid, iscsilun->allocmap_size); | |
525 | } | |
526 | } | |
527 | ||
528 | static inline bool | |
529 | iscsi_allocmap_is_allocated(IscsiLun *iscsilun, int64_t sector_num, | |
530 | int nb_sectors) | |
531 | { | |
532 | unsigned long size; | |
533 | if (iscsilun->allocmap == NULL) { | |
534 | return true; | |
b03c3805 | 535 | } |
e1123a3b PL |
536 | size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors); |
537 | return !(find_next_bit(iscsilun->allocmap, size, | |
538 | sector_num / iscsilun->cluster_sectors) == size); | |
539 | } | |
540 | ||
541 | static inline bool iscsi_allocmap_is_valid(IscsiLun *iscsilun, | |
542 | int64_t sector_num, int nb_sectors) | |
543 | { | |
544 | unsigned long size; | |
545 | if (iscsilun->allocmap_valid == NULL) { | |
546 | return false; | |
547 | } | |
548 | size = DIV_ROUND_UP(sector_num + nb_sectors, iscsilun->cluster_sectors); | |
549 | return (find_next_zero_bit(iscsilun->allocmap_valid, size, | |
550 | sector_num / iscsilun->cluster_sectors) == size); | |
b03c3805 PL |
551 | } |
552 | ||
9f0eb9e1 KW |
553 | static int coroutine_fn |
554 | iscsi_co_writev_flags(BlockDriverState *bs, int64_t sector_num, int nb_sectors, | |
555 | QEMUIOVector *iov, int flags) | |
c589b249 | 556 | { |
063c3378 PL |
557 | IscsiLun *iscsilun = bs->opaque; |
558 | struct IscsiTask iTask; | |
f4dfa67f | 559 | uint64_t lba; |
063c3378 | 560 | uint32_t num_sectors; |
4df863f3 | 561 | bool fua = flags & BDRV_REQ_FUA; |
d045c466 | 562 | int r = 0; |
c589b249 | 563 | |
4df863f3 EB |
564 | if (fua) { |
565 | assert(iscsilun->dpofua); | |
566 | } | |
94d047a3 | 567 | if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
063c3378 PL |
568 | return -EINVAL; |
569 | } | |
7371d56f | 570 | |
6bd01f14 EB |
571 | if (bs->bl.max_transfer) { |
572 | assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer); | |
dc9e7163 PL |
573 | } |
574 | ||
063c3378 PL |
575 | lba = sector_qemu2lun(sector_num, iscsilun); |
576 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
063c3378 | 577 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
d045c466 | 578 | qemu_mutex_lock(&iscsilun->mutex); |
063c3378 | 579 | retry: |
9281fe9e | 580 | if (iscsilun->use_16_for_rw) { |
583ec22e RS |
581 | #if LIBISCSI_API_VERSION >= (20160603) |
582 | iTask.task = iscsi_write16_iov_task(iscsilun->iscsi, iscsilun->lun, lba, | |
583 | NULL, num_sectors * iscsilun->block_size, | |
584 | iscsilun->block_size, 0, 0, fua, 0, 0, | |
585 | iscsi_co_generic_cb, &iTask, | |
586 | (struct scsi_iovec *)iov->iov, iov->niov); | |
587 | } else { | |
588 | iTask.task = iscsi_write10_iov_task(iscsilun->iscsi, iscsilun->lun, lba, | |
589 | NULL, num_sectors * iscsilun->block_size, | |
590 | iscsilun->block_size, 0, 0, fua, 0, 0, | |
591 | iscsi_co_generic_cb, &iTask, | |
592 | (struct scsi_iovec *)iov->iov, iov->niov); | |
593 | } | |
594 | #else | |
9281fe9e | 595 | iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, |
8c215a9f | 596 | NULL, num_sectors * iscsilun->block_size, |
73b5394e | 597 | iscsilun->block_size, 0, 0, fua, 0, 0, |
9281fe9e PL |
598 | iscsi_co_generic_cb, &iTask); |
599 | } else { | |
600 | iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
8c215a9f | 601 | NULL, num_sectors * iscsilun->block_size, |
73b5394e | 602 | iscsilun->block_size, 0, 0, fua, 0, 0, |
9281fe9e PL |
603 | iscsi_co_generic_cb, &iTask); |
604 | } | |
583ec22e | 605 | #endif |
063c3378 | 606 | if (iTask.task == NULL) { |
f6eb0b31 | 607 | qemu_mutex_unlock(&iscsilun->mutex); |
92397116 | 608 | return -ENOMEM; |
f4dfa67f | 609 | } |
583ec22e | 610 | #if LIBISCSI_API_VERSION < (20160603) |
063c3378 PL |
611 | scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, |
612 | iov->niov); | |
583ec22e | 613 | #endif |
063c3378 PL |
614 | while (!iTask.complete) { |
615 | iscsi_set_events(iscsilun); | |
d045c466 | 616 | qemu_mutex_unlock(&iscsilun->mutex); |
063c3378 | 617 | qemu_coroutine_yield(); |
d045c466 | 618 | qemu_mutex_lock(&iscsilun->mutex); |
c589b249 RS |
619 | } |
620 | ||
063c3378 PL |
621 | if (iTask.task != NULL) { |
622 | scsi_free_scsi_task(iTask.task); | |
623 | iTask.task = NULL; | |
91bea4e2 PL |
624 | } |
625 | ||
063c3378 | 626 | if (iTask.do_retry) { |
837c3901 | 627 | iTask.complete = 0; |
063c3378 | 628 | goto retry; |
1dde716e PL |
629 | } |
630 | ||
063c3378 | 631 | if (iTask.status != SCSI_STATUS_GOOD) { |
e1123a3b | 632 | iscsi_allocmap_set_invalid(iscsilun, sector_num, nb_sectors); |
e38bc234 PL |
633 | error_report("iSCSI WRITE10/16 failed at lba %" PRIu64 ": %s", lba, |
634 | iTask.err_str); | |
d045c466 PB |
635 | r = iTask.err_code; |
636 | goto out_unlock; | |
c589b249 RS |
637 | } |
638 | ||
e1123a3b | 639 | iscsi_allocmap_set_allocated(iscsilun, sector_num, nb_sectors); |
b03c3805 | 640 | |
d045c466 PB |
641 | out_unlock: |
642 | qemu_mutex_unlock(&iscsilun->mutex); | |
e38bc234 | 643 | g_free(iTask.err_str); |
d045c466 | 644 | return r; |
c589b249 RS |
645 | } |
646 | ||
b03c3805 | 647 | |
b03c3805 | 648 | |
b03c3805 PL |
649 | static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs, |
650 | int64_t sector_num, | |
67a0fd2a FZ |
651 | int nb_sectors, int *pnum, |
652 | BlockDriverState **file) | |
b03c3805 PL |
653 | { |
654 | IscsiLun *iscsilun = bs->opaque; | |
655 | struct scsi_get_lba_status *lbas = NULL; | |
656 | struct scsi_lba_status_descriptor *lbasd = NULL; | |
657 | struct IscsiTask iTask; | |
e38bc234 | 658 | uint64_t lba; |
b03c3805 PL |
659 | int64_t ret; |
660 | ||
94d047a3 | 661 | if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
b03c3805 PL |
662 | ret = -EINVAL; |
663 | goto out; | |
664 | } | |
665 | ||
666 | /* default to all sectors allocated */ | |
667 | ret = BDRV_BLOCK_DATA; | |
668 | ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; | |
669 | *pnum = nb_sectors; | |
670 | ||
671 | /* LUN does not support logical block provisioning */ | |
0a386e48 | 672 | if (!iscsilun->lbpme) { |
b03c3805 PL |
673 | goto out; |
674 | } | |
675 | ||
e38bc234 PL |
676 | lba = sector_qemu2lun(sector_num, iscsilun); |
677 | ||
678 | iscsi_co_init_iscsitask(iscsilun, &iTask); | |
d045c466 | 679 | qemu_mutex_lock(&iscsilun->mutex); |
b03c3805 PL |
680 | retry: |
681 | if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun, | |
e38bc234 | 682 | lba, 8 + 16, iscsi_co_generic_cb, |
b03c3805 PL |
683 | &iTask) == NULL) { |
684 | ret = -ENOMEM; | |
d045c466 | 685 | goto out_unlock; |
b03c3805 PL |
686 | } |
687 | ||
688 | while (!iTask.complete) { | |
689 | iscsi_set_events(iscsilun); | |
d045c466 | 690 | qemu_mutex_unlock(&iscsilun->mutex); |
b03c3805 | 691 | qemu_coroutine_yield(); |
d045c466 | 692 | qemu_mutex_lock(&iscsilun->mutex); |
b03c3805 PL |
693 | } |
694 | ||
695 | if (iTask.do_retry) { | |
696 | if (iTask.task != NULL) { | |
697 | scsi_free_scsi_task(iTask.task); | |
698 | iTask.task = NULL; | |
699 | } | |
700 | iTask.complete = 0; | |
701 | goto retry; | |
702 | } | |
703 | ||
704 | if (iTask.status != SCSI_STATUS_GOOD) { | |
705 | /* in case the get_lba_status_callout fails (i.e. | |
706 | * because the device is busy or the cmd is not | |
707 | * supported) we pretend all blocks are allocated | |
708 | * for backwards compatibility */ | |
e38bc234 PL |
709 | error_report("iSCSI GET_LBA_STATUS failed at lba %" PRIu64 ": %s", |
710 | lba, iTask.err_str); | |
d045c466 | 711 | goto out_unlock; |
b03c3805 PL |
712 | } |
713 | ||
714 | lbas = scsi_datain_unmarshall(iTask.task); | |
715 | if (lbas == NULL) { | |
716 | ret = -EIO; | |
d045c466 | 717 | goto out_unlock; |
b03c3805 PL |
718 | } |
719 | ||
720 | lbasd = &lbas->descriptors[0]; | |
721 | ||
722 | if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) { | |
723 | ret = -EIO; | |
d045c466 | 724 | goto out_unlock; |
b03c3805 PL |
725 | } |
726 | ||
727 | *pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); | |
728 | ||
729 | if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED || | |
730 | lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { | |
731 | ret &= ~BDRV_BLOCK_DATA; | |
732 | if (iscsilun->lbprz) { | |
733 | ret |= BDRV_BLOCK_ZERO; | |
734 | } | |
735 | } | |
736 | ||
737 | if (ret & BDRV_BLOCK_ZERO) { | |
e1123a3b | 738 | iscsi_allocmap_set_unallocated(iscsilun, sector_num, *pnum); |
b03c3805 | 739 | } else { |
e1123a3b | 740 | iscsi_allocmap_set_allocated(iscsilun, sector_num, *pnum); |
b03c3805 PL |
741 | } |
742 | ||
743 | if (*pnum > nb_sectors) { | |
744 | *pnum = nb_sectors; | |
745 | } | |
d045c466 PB |
746 | out_unlock: |
747 | qemu_mutex_unlock(&iscsilun->mutex); | |
e38bc234 | 748 | g_free(iTask.err_str); |
b03c3805 PL |
749 | out: |
750 | if (iTask.task != NULL) { | |
751 | scsi_free_scsi_task(iTask.task); | |
752 | } | |
3399833f FZ |
753 | if (ret > 0 && ret & BDRV_BLOCK_OFFSET_VALID) { |
754 | *file = bs; | |
755 | } | |
b03c3805 PL |
756 | return ret; |
757 | } | |
758 | ||
063c3378 PL |
759 | static int coroutine_fn iscsi_co_readv(BlockDriverState *bs, |
760 | int64_t sector_num, int nb_sectors, | |
761 | QEMUIOVector *iov) | |
c589b249 | 762 | { |
063c3378 PL |
763 | IscsiLun *iscsilun = bs->opaque; |
764 | struct IscsiTask iTask; | |
1dde716e PL |
765 | uint64_t lba; |
766 | uint32_t num_sectors; | |
e38bc234 | 767 | int r = 0; |
c589b249 | 768 | |
94d047a3 | 769 | if (!is_sector_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
063c3378 | 770 | return -EINVAL; |
f4dfa67f | 771 | } |
f4dfa67f | 772 | |
6bd01f14 EB |
773 | if (bs->bl.max_transfer) { |
774 | assert(nb_sectors << BDRV_SECTOR_BITS <= bs->bl.max_transfer); | |
dc9e7163 PL |
775 | } |
776 | ||
e1123a3b PL |
777 | /* if cache.direct is off and we have a valid entry in our allocation map |
778 | * we can skip checking the block status and directly return zeroes if | |
779 | * the request falls within an unallocated area */ | |
780 | if (iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) && | |
781 | !iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) { | |
782 | qemu_iovec_memset(iov, 0, 0x00, iov->size); | |
783 | return 0; | |
784 | } | |
785 | ||
786 | if (nb_sectors >= ISCSI_CHECKALLOC_THRES && | |
787 | !iscsi_allocmap_is_valid(iscsilun, sector_num, nb_sectors) && | |
788 | !iscsi_allocmap_is_allocated(iscsilun, sector_num, nb_sectors)) { | |
b03c3805 | 789 | int pnum; |
67a0fd2a | 790 | BlockDriverState *file; |
e1123a3b PL |
791 | /* check the block status from the beginning of the cluster |
792 | * containing the start sector */ | |
793 | int64_t ret = iscsi_co_get_block_status(bs, | |
794 | sector_num - sector_num % iscsilun->cluster_sectors, | |
795 | BDRV_REQUEST_MAX_SECTORS, &pnum, &file); | |
b03c3805 PL |
796 | if (ret < 0) { |
797 | return ret; | |
798 | } | |
e1123a3b PL |
799 | /* if the whole request falls into an unallocated area we can avoid |
800 | * to read and directly return zeroes instead */ | |
801 | if (ret & BDRV_BLOCK_ZERO && | |
802 | pnum >= nb_sectors + sector_num % iscsilun->cluster_sectors) { | |
b03c3805 PL |
803 | qemu_iovec_memset(iov, 0, 0x00, iov->size); |
804 | return 0; | |
805 | } | |
806 | } | |
b03c3805 | 807 | |
063c3378 PL |
808 | lba = sector_qemu2lun(sector_num, iscsilun); |
809 | num_sectors = sector_qemu2lun(nb_sectors, iscsilun); | |
f4dfa67f | 810 | |
063c3378 | 811 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
d045c466 | 812 | qemu_mutex_lock(&iscsilun->mutex); |
063c3378 | 813 | retry: |
9281fe9e | 814 | if (iscsilun->use_16_for_rw) { |
583ec22e RS |
815 | #if LIBISCSI_API_VERSION >= (20160603) |
816 | iTask.task = iscsi_read16_iov_task(iscsilun->iscsi, iscsilun->lun, lba, | |
817 | num_sectors * iscsilun->block_size, | |
818 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
819 | iscsi_co_generic_cb, &iTask, | |
820 | (struct scsi_iovec *)iov->iov, iov->niov); | |
821 | } else { | |
822 | iTask.task = iscsi_read10_iov_task(iscsilun->iscsi, iscsilun->lun, lba, | |
823 | num_sectors * iscsilun->block_size, | |
824 | iscsilun->block_size, | |
825 | 0, 0, 0, 0, 0, | |
826 | iscsi_co_generic_cb, &iTask, | |
827 | (struct scsi_iovec *)iov->iov, iov->niov); | |
828 | } | |
829 | #else | |
063c3378 PL |
830 | iTask.task = iscsi_read16_task(iscsilun->iscsi, iscsilun->lun, lba, |
831 | num_sectors * iscsilun->block_size, | |
832 | iscsilun->block_size, 0, 0, 0, 0, 0, | |
833 | iscsi_co_generic_cb, &iTask); | |
9281fe9e | 834 | } else { |
063c3378 PL |
835 | iTask.task = iscsi_read10_task(iscsilun->iscsi, iscsilun->lun, lba, |
836 | num_sectors * iscsilun->block_size, | |
219c2521 | 837 | iscsilun->block_size, |
219c2521 | 838 | 0, 0, 0, 0, 0, |
063c3378 | 839 | iscsi_co_generic_cb, &iTask); |
f4dfa67f | 840 | } |
583ec22e | 841 | #endif |
063c3378 | 842 | if (iTask.task == NULL) { |
f6eb0b31 | 843 | qemu_mutex_unlock(&iscsilun->mutex); |
92397116 | 844 | return -ENOMEM; |
c589b249 | 845 | } |
583ec22e | 846 | #if LIBISCSI_API_VERSION < (20160603) |
063c3378 | 847 | scsi_task_set_iov_in(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); |
583ec22e | 848 | #endif |
063c3378 PL |
849 | while (!iTask.complete) { |
850 | iscsi_set_events(iscsilun); | |
d045c466 | 851 | qemu_mutex_unlock(&iscsilun->mutex); |
063c3378 | 852 | qemu_coroutine_yield(); |
d045c466 | 853 | qemu_mutex_lock(&iscsilun->mutex); |
1dde716e | 854 | } |
c589b249 | 855 | |
063c3378 PL |
856 | if (iTask.task != NULL) { |
857 | scsi_free_scsi_task(iTask.task); | |
858 | iTask.task = NULL; | |
c589b249 RS |
859 | } |
860 | ||
063c3378 | 861 | if (iTask.do_retry) { |
837c3901 | 862 | iTask.complete = 0; |
063c3378 | 863 | goto retry; |
c589b249 RS |
864 | } |
865 | ||
063c3378 | 866 | if (iTask.status != SCSI_STATUS_GOOD) { |
e38bc234 PL |
867 | error_report("iSCSI READ10/16 failed at lba %" PRIu64 ": %s", |
868 | lba, iTask.err_str); | |
869 | r = iTask.err_code; | |
1dde716e PL |
870 | } |
871 | ||
e38bc234 PL |
872 | qemu_mutex_unlock(&iscsilun->mutex); |
873 | g_free(iTask.err_str); | |
874 | return r; | |
1dde716e PL |
875 | } |
876 | ||
063c3378 | 877 | static int coroutine_fn iscsi_co_flush(BlockDriverState *bs) |
1dde716e PL |
878 | { |
879 | IscsiLun *iscsilun = bs->opaque; | |
063c3378 | 880 | struct IscsiTask iTask; |
e38bc234 | 881 | int r = 0; |
1dde716e | 882 | |
73b5394e | 883 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
d045c466 | 884 | qemu_mutex_lock(&iscsilun->mutex); |
063c3378 PL |
885 | retry: |
886 | if (iscsi_synchronizecache10_task(iscsilun->iscsi, iscsilun->lun, 0, 0, 0, | |
887 | 0, iscsi_co_generic_cb, &iTask) == NULL) { | |
f6eb0b31 | 888 | qemu_mutex_unlock(&iscsilun->mutex); |
92397116 | 889 | return -ENOMEM; |
063c3378 | 890 | } |
1dde716e | 891 | |
063c3378 PL |
892 | while (!iTask.complete) { |
893 | iscsi_set_events(iscsilun); | |
d045c466 | 894 | qemu_mutex_unlock(&iscsilun->mutex); |
063c3378 | 895 | qemu_coroutine_yield(); |
d045c466 | 896 | qemu_mutex_lock(&iscsilun->mutex); |
063c3378 | 897 | } |
1dde716e | 898 | |
063c3378 PL |
899 | if (iTask.task != NULL) { |
900 | scsi_free_scsi_task(iTask.task); | |
901 | iTask.task = NULL; | |
c589b249 RS |
902 | } |
903 | ||
063c3378 | 904 | if (iTask.do_retry) { |
837c3901 | 905 | iTask.complete = 0; |
063c3378 PL |
906 | goto retry; |
907 | } | |
c589b249 | 908 | |
063c3378 | 909 | if (iTask.status != SCSI_STATUS_GOOD) { |
e38bc234 PL |
910 | error_report("iSCSI SYNCHRONIZECACHE10 failed: %s", iTask.err_str); |
911 | r = iTask.err_code; | |
063c3378 PL |
912 | } |
913 | ||
e38bc234 PL |
914 | qemu_mutex_unlock(&iscsilun->mutex); |
915 | g_free(iTask.err_str); | |
916 | return r; | |
c589b249 RS |
917 | } |
918 | ||
98392453 | 919 | #ifdef __linux__ |
d045c466 | 920 | /* Called (via iscsi_service) with QemuMutex held. */ |
98392453 RS |
921 | static void |
922 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
923 | void *command_data, void *opaque) | |
924 | { | |
925 | IscsiAIOCB *acb = opaque; | |
926 | ||
0a53f010 RS |
927 | g_free(acb->buf); |
928 | acb->buf = NULL; | |
929 | ||
98392453 RS |
930 | acb->status = 0; |
931 | if (status < 0) { | |
932 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
933 | iscsi_get_error(iscsi)); | |
e01dd3da | 934 | acb->status = iscsi_translate_sense(&acb->task->sense); |
98392453 RS |
935 | } |
936 | ||
937 | acb->ioh->driver_status = 0; | |
938 | acb->ioh->host_status = 0; | |
939 | acb->ioh->resid = 0; | |
644c6869 | 940 | acb->ioh->status = status; |
98392453 RS |
941 | |
942 | #define SG_ERR_DRIVER_SENSE 0x08 | |
943 | ||
944 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
945 | int ss; | |
946 | ||
947 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
948 | ||
949 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
950 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
951 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
952 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
953 | } | |
954 | ||
cfb3f506 | 955 | iscsi_schedule_bh(acb); |
98392453 RS |
956 | } |
957 | ||
4bb17ab5 FZ |
958 | static void iscsi_ioctl_bh_completion(void *opaque) |
959 | { | |
960 | IscsiAIOCB *acb = opaque; | |
961 | ||
962 | qemu_bh_delete(acb->bh); | |
963 | acb->common.cb(acb->common.opaque, acb->ret); | |
964 | qemu_aio_unref(acb); | |
965 | } | |
966 | ||
967 | static void iscsi_ioctl_handle_emulated(IscsiAIOCB *acb, int req, void *buf) | |
968 | { | |
969 | BlockDriverState *bs = acb->common.bs; | |
970 | IscsiLun *iscsilun = bs->opaque; | |
971 | int ret = 0; | |
972 | ||
973 | switch (req) { | |
974 | case SG_GET_VERSION_NUM: | |
975 | *(int *)buf = 30000; | |
976 | break; | |
977 | case SG_GET_SCSI_ID: | |
978 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
979 | break; | |
980 | default: | |
981 | ret = -EINVAL; | |
982 | } | |
983 | assert(!acb->bh); | |
984 | acb->bh = aio_bh_new(bdrv_get_aio_context(bs), | |
985 | iscsi_ioctl_bh_completion, acb); | |
986 | acb->ret = ret; | |
987 | qemu_bh_schedule(acb->bh); | |
988 | } | |
989 | ||
7c84b1b8 | 990 | static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, |
98392453 | 991 | unsigned long int req, void *buf, |
097310b5 | 992 | BlockCompletionFunc *cb, void *opaque) |
98392453 RS |
993 | { |
994 | IscsiLun *iscsilun = bs->opaque; | |
995 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
996 | struct iscsi_data data; | |
997 | IscsiAIOCB *acb; | |
998 | ||
d7331bed | 999 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
1000 | |
1001 | acb->iscsilun = iscsilun; | |
1bd075f2 PB |
1002 | acb->bh = NULL; |
1003 | acb->status = -EINPROGRESS; | |
98392453 RS |
1004 | acb->buf = NULL; |
1005 | acb->ioh = buf; | |
1006 | ||
4bb17ab5 FZ |
1007 | if (req != SG_IO) { |
1008 | iscsi_ioctl_handle_emulated(acb, req, buf); | |
1009 | return &acb->common; | |
1010 | } | |
1011 | ||
a6b3167f PL |
1012 | if (acb->ioh->cmd_len > SCSI_CDB_MAX_SIZE) { |
1013 | error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)", | |
1014 | acb->ioh->cmd_len, SCSI_CDB_MAX_SIZE); | |
1015 | qemu_aio_unref(acb); | |
1016 | return NULL; | |
1017 | } | |
1018 | ||
98392453 RS |
1019 | acb->task = malloc(sizeof(struct scsi_task)); |
1020 | if (acb->task == NULL) { | |
1021 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
1022 | iscsi_get_error(iscsi)); | |
8007429a | 1023 | qemu_aio_unref(acb); |
98392453 RS |
1024 | return NULL; |
1025 | } | |
1026 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
1027 | ||
1028 | switch (acb->ioh->dxfer_direction) { | |
1029 | case SG_DXFER_TO_DEV: | |
1030 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
1031 | break; | |
1032 | case SG_DXFER_FROM_DEV: | |
1033 | acb->task->xfer_dir = SCSI_XFER_READ; | |
1034 | break; | |
1035 | default: | |
1036 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
1037 | break; | |
1038 | } | |
1039 | ||
1040 | acb->task->cdb_size = acb->ioh->cmd_len; | |
1041 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
1042 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
1043 | ||
0a53f010 | 1044 | data.size = 0; |
d045c466 | 1045 | qemu_mutex_lock(&iscsilun->mutex); |
98392453 | 1046 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
1047 | if (acb->ioh->iovec_count == 0) { |
1048 | data.data = acb->ioh->dxferp; | |
1049 | data.size = acb->ioh->dxfer_len; | |
1050 | } else { | |
0a53f010 RS |
1051 | scsi_task_set_iov_out(acb->task, |
1052 | (struct scsi_iovec *) acb->ioh->dxferp, | |
1053 | acb->ioh->iovec_count); | |
0a53f010 | 1054 | } |
98392453 | 1055 | } |
0a53f010 | 1056 | |
98392453 RS |
1057 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
1058 | iscsi_aio_ioctl_cb, | |
0a53f010 | 1059 | (data.size > 0) ? &data : NULL, |
98392453 | 1060 | acb) != 0) { |
d045c466 | 1061 | qemu_mutex_unlock(&iscsilun->mutex); |
98392453 | 1062 | scsi_free_scsi_task(acb->task); |
8007429a | 1063 | qemu_aio_unref(acb); |
98392453 RS |
1064 | return NULL; |
1065 | } | |
1066 | ||
1067 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
1068 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
1069 | if (acb->ioh->iovec_count == 0) { |
1070 | scsi_task_add_data_in_buffer(acb->task, | |
1071 | acb->ioh->dxfer_len, | |
1072 | acb->ioh->dxferp); | |
1073 | } else { | |
0a53f010 RS |
1074 | scsi_task_set_iov_in(acb->task, |
1075 | (struct scsi_iovec *) acb->ioh->dxferp, | |
1076 | acb->ioh->iovec_count); | |
0a53f010 | 1077 | } |
98392453 RS |
1078 | } |
1079 | ||
1080 | iscsi_set_events(iscsilun); | |
d045c466 | 1081 | qemu_mutex_unlock(&iscsilun->mutex); |
98392453 RS |
1082 | |
1083 | return &acb->common; | |
1084 | } | |
1085 | ||
98392453 RS |
1086 | #endif |
1087 | ||
c589b249 RS |
1088 | static int64_t |
1089 | iscsi_getlength(BlockDriverState *bs) | |
1090 | { | |
1091 | IscsiLun *iscsilun = bs->opaque; | |
1092 | int64_t len; | |
1093 | ||
1094 | len = iscsilun->num_blocks; | |
1095 | len *= iscsilun->block_size; | |
1096 | ||
1097 | return len; | |
1098 | } | |
1099 | ||
65f3e339 | 1100 | static int |
f5a5ca79 | 1101 | coroutine_fn iscsi_co_pdiscard(BlockDriverState *bs, int64_t offset, int bytes) |
65f3e339 PL |
1102 | { |
1103 | IscsiLun *iscsilun = bs->opaque; | |
1104 | struct IscsiTask iTask; | |
1105 | struct unmap_list list; | |
d045c466 | 1106 | int r = 0; |
65f3e339 | 1107 | |
f5a5ca79 | 1108 | if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) { |
49228d1e EB |
1109 | return -ENOTSUP; |
1110 | } | |
65f3e339 PL |
1111 | |
1112 | if (!iscsilun->lbp.lbpu) { | |
1113 | /* UNMAP is not supported by the target */ | |
1114 | return 0; | |
1115 | } | |
1116 | ||
97c7e85c | 1117 | list.lba = offset / iscsilun->block_size; |
f5a5ca79 | 1118 | list.num = bytes / iscsilun->block_size; |
65f3e339 | 1119 | |
01a6a238 | 1120 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
d045c466 | 1121 | qemu_mutex_lock(&iscsilun->mutex); |
65f3e339 | 1122 | retry: |
01a6a238 | 1123 | if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
97c7e85c | 1124 | iscsi_co_generic_cb, &iTask) == NULL) { |
d045c466 PB |
1125 | r = -ENOMEM; |
1126 | goto out_unlock; | |
01a6a238 | 1127 | } |
65f3e339 | 1128 | |
01a6a238 PL |
1129 | while (!iTask.complete) { |
1130 | iscsi_set_events(iscsilun); | |
d045c466 | 1131 | qemu_mutex_unlock(&iscsilun->mutex); |
01a6a238 | 1132 | qemu_coroutine_yield(); |
d045c466 | 1133 | qemu_mutex_lock(&iscsilun->mutex); |
01a6a238 | 1134 | } |
65f3e339 | 1135 | |
01a6a238 PL |
1136 | if (iTask.task != NULL) { |
1137 | scsi_free_scsi_task(iTask.task); | |
1138 | iTask.task = NULL; | |
1139 | } | |
65f3e339 | 1140 | |
01a6a238 | 1141 | if (iTask.do_retry) { |
837c3901 | 1142 | iTask.complete = 0; |
01a6a238 PL |
1143 | goto retry; |
1144 | } | |
65f3e339 | 1145 | |
aef172ff PL |
1146 | iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, |
1147 | bytes >> BDRV_SECTOR_BITS); | |
1148 | ||
01a6a238 PL |
1149 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION) { |
1150 | /* the target might fail with a check condition if it | |
1151 | is not happy with the alignment of the UNMAP request | |
1152 | we silently fail in this case */ | |
d045c466 | 1153 | goto out_unlock; |
01a6a238 | 1154 | } |
65f3e339 | 1155 | |
01a6a238 | 1156 | if (iTask.status != SCSI_STATUS_GOOD) { |
e38bc234 PL |
1157 | error_report("iSCSI UNMAP failed at lba %" PRIu64 ": %s", |
1158 | list.lba, iTask.err_str); | |
d045c466 PB |
1159 | r = iTask.err_code; |
1160 | goto out_unlock; | |
65f3e339 PL |
1161 | } |
1162 | ||
d045c466 PB |
1163 | out_unlock: |
1164 | qemu_mutex_unlock(&iscsilun->mutex); | |
e38bc234 | 1165 | g_free(iTask.err_str); |
d045c466 | 1166 | return r; |
65f3e339 PL |
1167 | } |
1168 | ||
d4cd9615 | 1169 | static int |
94d047a3 | 1170 | coroutine_fn iscsi_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, |
f5a5ca79 | 1171 | int bytes, BdrvRequestFlags flags) |
d4cd9615 PL |
1172 | { |
1173 | IscsiLun *iscsilun = bs->opaque; | |
1174 | struct IscsiTask iTask; | |
1175 | uint64_t lba; | |
1176 | uint32_t nb_blocks; | |
9281fe9e | 1177 | bool use_16_for_ws = iscsilun->use_16_for_rw; |
d045c466 | 1178 | int r = 0; |
d4cd9615 | 1179 | |
f5a5ca79 | 1180 | if (!is_byte_request_lun_aligned(offset, bytes, iscsilun)) { |
94d047a3 | 1181 | return -ENOTSUP; |
d4cd9615 PL |
1182 | } |
1183 | ||
9281fe9e PL |
1184 | if (flags & BDRV_REQ_MAY_UNMAP) { |
1185 | if (!use_16_for_ws && !iscsilun->lbp.lbpws10) { | |
1186 | /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */ | |
1187 | use_16_for_ws = true; | |
1188 | } | |
1189 | if (use_16_for_ws && !iscsilun->lbp.lbpws) { | |
1190 | /* WRITESAME16 with UNMAP is not supported by the target, | |
1191 | * fall back and try WRITESAME10/16 without UNMAP */ | |
1192 | flags &= ~BDRV_REQ_MAY_UNMAP; | |
1193 | use_16_for_ws = iscsilun->use_16_for_rw; | |
1194 | } | |
fa6252b0 PB |
1195 | } |
1196 | ||
dbe5c58f | 1197 | if (!(flags & BDRV_REQ_MAY_UNMAP) && !iscsilun->has_write_same) { |
9281fe9e | 1198 | /* WRITESAME without UNMAP is not supported by the target */ |
d4cd9615 PL |
1199 | return -ENOTSUP; |
1200 | } | |
1201 | ||
94d047a3 | 1202 | lba = offset / iscsilun->block_size; |
f5a5ca79 | 1203 | nb_blocks = bytes / iscsilun->block_size; |
d4cd9615 PL |
1204 | |
1205 | if (iscsilun->zeroblock == NULL) { | |
4d5a3f88 KW |
1206 | iscsilun->zeroblock = g_try_malloc0(iscsilun->block_size); |
1207 | if (iscsilun->zeroblock == NULL) { | |
1208 | return -ENOMEM; | |
1209 | } | |
d4cd9615 PL |
1210 | } |
1211 | ||
d045c466 | 1212 | qemu_mutex_lock(&iscsilun->mutex); |
d4cd9615 PL |
1213 | iscsi_co_init_iscsitask(iscsilun, &iTask); |
1214 | retry: | |
9281fe9e PL |
1215 | if (use_16_for_ws) { |
1216 | iTask.task = iscsi_writesame16_task(iscsilun->iscsi, iscsilun->lun, lba, | |
1217 | iscsilun->zeroblock, iscsilun->block_size, | |
1218 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
1219 | 0, 0, iscsi_co_generic_cb, &iTask); | |
1220 | } else { | |
1221 | iTask.task = iscsi_writesame10_task(iscsilun->iscsi, iscsilun->lun, lba, | |
1222 | iscsilun->zeroblock, iscsilun->block_size, | |
1223 | nb_blocks, 0, !!(flags & BDRV_REQ_MAY_UNMAP), | |
1224 | 0, 0, iscsi_co_generic_cb, &iTask); | |
1225 | } | |
1226 | if (iTask.task == NULL) { | |
f6eb0b31 | 1227 | qemu_mutex_unlock(&iscsilun->mutex); |
92397116 | 1228 | return -ENOMEM; |
d4cd9615 PL |
1229 | } |
1230 | ||
1231 | while (!iTask.complete) { | |
1232 | iscsi_set_events(iscsilun); | |
d045c466 | 1233 | qemu_mutex_unlock(&iscsilun->mutex); |
d4cd9615 | 1234 | qemu_coroutine_yield(); |
d045c466 | 1235 | qemu_mutex_lock(&iscsilun->mutex); |
d4cd9615 PL |
1236 | } |
1237 | ||
d9738fd2 PL |
1238 | if (iTask.status == SCSI_STATUS_CHECK_CONDITION && |
1239 | iTask.task->sense.key == SCSI_SENSE_ILLEGAL_REQUEST && | |
27898a5d PB |
1240 | (iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE || |
1241 | iTask.task->sense.ascq == SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB)) { | |
d9738fd2 PL |
1242 | /* WRITE SAME is not supported by the target */ |
1243 | iscsilun->has_write_same = false; | |
1244 | scsi_free_scsi_task(iTask.task); | |
d045c466 PB |
1245 | r = -ENOTSUP; |
1246 | goto out_unlock; | |
d9738fd2 PL |
1247 | } |
1248 | ||
d4cd9615 PL |
1249 | if (iTask.task != NULL) { |
1250 | scsi_free_scsi_task(iTask.task); | |
1251 | iTask.task = NULL; | |
1252 | } | |
1253 | ||
1254 | if (iTask.do_retry) { | |
837c3901 | 1255 | iTask.complete = 0; |
d4cd9615 PL |
1256 | goto retry; |
1257 | } | |
1258 | ||
1259 | if (iTask.status != SCSI_STATUS_GOOD) { | |
e1123a3b | 1260 | iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, |
f5a5ca79 | 1261 | bytes >> BDRV_SECTOR_BITS); |
e38bc234 PL |
1262 | error_report("iSCSI WRITESAME10/16 failed at lba %" PRIu64 ": %s", |
1263 | lba, iTask.err_str); | |
d045c466 PB |
1264 | r = iTask.err_code; |
1265 | goto out_unlock; | |
d4cd9615 PL |
1266 | } |
1267 | ||
b03c3805 | 1268 | if (flags & BDRV_REQ_MAY_UNMAP) { |
e1123a3b | 1269 | iscsi_allocmap_set_invalid(iscsilun, offset >> BDRV_SECTOR_BITS, |
f5a5ca79 | 1270 | bytes >> BDRV_SECTOR_BITS); |
b03c3805 | 1271 | } else { |
e1123a3b | 1272 | iscsi_allocmap_set_allocated(iscsilun, offset >> BDRV_SECTOR_BITS, |
f5a5ca79 | 1273 | bytes >> BDRV_SECTOR_BITS); |
b03c3805 PL |
1274 | } |
1275 | ||
d045c466 PB |
1276 | out_unlock: |
1277 | qemu_mutex_unlock(&iscsilun->mutex); | |
e38bc234 | 1278 | g_free(iTask.err_str); |
d045c466 | 1279 | return r; |
d4cd9615 PL |
1280 | } |
1281 | ||
43171420 | 1282 | static void apply_chap(struct iscsi_context *iscsi, QemuOpts *opts, |
f2917853 | 1283 | Error **errp) |
f9dadc98 | 1284 | { |
f9dadc98 RS |
1285 | const char *user = NULL; |
1286 | const char *password = NULL; | |
b189346e DB |
1287 | const char *secretid; |
1288 | char *secret = NULL; | |
f9dadc98 | 1289 | |
f9dadc98 RS |
1290 | user = qemu_opt_get(opts, "user"); |
1291 | if (!user) { | |
f2917853 | 1292 | return; |
f9dadc98 RS |
1293 | } |
1294 | ||
b189346e | 1295 | secretid = qemu_opt_get(opts, "password-secret"); |
f9dadc98 | 1296 | password = qemu_opt_get(opts, "password"); |
b189346e DB |
1297 | if (secretid && password) { |
1298 | error_setg(errp, "'password' and 'password-secret' properties are " | |
1299 | "mutually exclusive"); | |
1300 | return; | |
1301 | } | |
1302 | if (secretid) { | |
1303 | secret = qcrypto_secret_lookup_as_utf8(secretid, errp); | |
1304 | if (!secret) { | |
1305 | return; | |
1306 | } | |
1307 | password = secret; | |
1308 | } else if (!password) { | |
f2917853 PB |
1309 | error_setg(errp, "CHAP username specified but no password was given"); |
1310 | return; | |
f9dadc98 RS |
1311 | } |
1312 | ||
1313 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
f2917853 | 1314 | error_setg(errp, "Failed to set initiator username and password"); |
f9dadc98 | 1315 | } |
b189346e DB |
1316 | |
1317 | g_free(secret); | |
f9dadc98 RS |
1318 | } |
1319 | ||
81aa2a0f | 1320 | static void apply_header_digest(struct iscsi_context *iscsi, QemuOpts *opts, |
f2917853 | 1321 | Error **errp) |
f9dadc98 | 1322 | { |
f9dadc98 RS |
1323 | const char *digest = NULL; |
1324 | ||
f9dadc98 RS |
1325 | digest = qemu_opt_get(opts, "header-digest"); |
1326 | if (!digest) { | |
81aa2a0f | 1327 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
31eb1202 | 1328 | } else if (!strcmp(digest, "crc32c")) { |
f9dadc98 | 1329 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); |
31eb1202 | 1330 | } else if (!strcmp(digest, "none")) { |
f9dadc98 | 1331 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); |
31eb1202 | 1332 | } else if (!strcmp(digest, "crc32c-none")) { |
f9dadc98 | 1333 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); |
31eb1202 | 1334 | } else if (!strcmp(digest, "none-crc32c")) { |
f9dadc98 RS |
1335 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
1336 | } else { | |
f2917853 | 1337 | error_setg(errp, "Invalid header-digest setting : %s", digest); |
f9dadc98 RS |
1338 | } |
1339 | } | |
1340 | ||
d4e79929 | 1341 | static char *get_initiator_name(QemuOpts *opts) |
f9dadc98 | 1342 | { |
5accc840 PB |
1343 | const char *name; |
1344 | char *iscsi_name; | |
1345 | UuidInfo *uuid_info; | |
f9dadc98 | 1346 | |
d4e79929 KW |
1347 | name = qemu_opt_get(opts, "initiator-name"); |
1348 | if (name) { | |
1349 | return g_strdup(name); | |
f9dadc98 RS |
1350 | } |
1351 | ||
5accc840 PB |
1352 | uuid_info = qmp_query_uuid(NULL); |
1353 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
1354 | name = qemu_get_vm_name(); | |
f2ef4a6d | 1355 | } else { |
5accc840 | 1356 | name = uuid_info->UUID; |
f9dadc98 | 1357 | } |
5accc840 PB |
1358 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
1359 | name ? ":" : "", name ? name : ""); | |
1360 | qapi_free_UuidInfo(uuid_info); | |
1361 | return iscsi_name; | |
f9dadc98 RS |
1362 | } |
1363 | ||
5b5d34ec PL |
1364 | static void iscsi_nop_timed_event(void *opaque) |
1365 | { | |
1366 | IscsiLun *iscsilun = opaque; | |
1367 | ||
d045c466 | 1368 | qemu_mutex_lock(&iscsilun->mutex); |
5dd7a535 | 1369 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) >= MAX_NOP_FAILURES) { |
5b5d34ec | 1370 | error_report("iSCSI: NOP timeout. Reconnecting..."); |
5dd7a535 PL |
1371 | iscsilun->request_timed_out = true; |
1372 | } else if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
5b5d34ec | 1373 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); |
2f47da5f | 1374 | goto out; |
5b5d34ec PL |
1375 | } |
1376 | ||
bc72ad67 | 1377 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec | 1378 | iscsi_set_events(iscsilun); |
2f47da5f PB |
1379 | |
1380 | out: | |
d045c466 | 1381 | qemu_mutex_unlock(&iscsilun->mutex); |
5b5d34ec | 1382 | } |
5b5d34ec | 1383 | |
f2917853 | 1384 | static void iscsi_readcapacity_sync(IscsiLun *iscsilun, Error **errp) |
cb1b83e7 PL |
1385 | { |
1386 | struct scsi_task *task = NULL; | |
1387 | struct scsi_readcapacity10 *rc10 = NULL; | |
1388 | struct scsi_readcapacity16 *rc16 = NULL; | |
cb1b83e7 PL |
1389 | int retries = ISCSI_CMD_RETRIES; |
1390 | ||
1288844e PB |
1391 | do { |
1392 | if (task != NULL) { | |
1393 | scsi_free_scsi_task(task); | |
1394 | task = NULL; | |
cb1b83e7 | 1395 | } |
1288844e PB |
1396 | |
1397 | switch (iscsilun->type) { | |
1398 | case TYPE_DISK: | |
1399 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
1400 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1401 | rc16 = scsi_datain_unmarshall(task); | |
1402 | if (rc16 == NULL) { | |
f2917853 | 1403 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity16 data."); |
1288844e PB |
1404 | } else { |
1405 | iscsilun->block_size = rc16->block_length; | |
1406 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
0a386e48 PL |
1407 | iscsilun->lbpme = !!rc16->lbpme; |
1408 | iscsilun->lbprz = !!rc16->lbprz; | |
9281fe9e | 1409 | iscsilun->use_16_for_rw = (rc16->returned_lba > 0xffffffff); |
1288844e | 1410 | } |
1cb6d137 | 1411 | break; |
1288844e | 1412 | } |
1cb6d137 ZL |
1413 | if (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1414 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { | |
1415 | break; | |
1416 | } | |
1417 | /* Fall through and try READ CAPACITY(10) instead. */ | |
1288844e PB |
1418 | case TYPE_ROM: |
1419 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1420 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1421 | rc10 = scsi_datain_unmarshall(task); | |
1422 | if (rc10 == NULL) { | |
f2917853 | 1423 | error_setg(errp, "iSCSI: Failed to unmarshall readcapacity10 data."); |
1288844e PB |
1424 | } else { |
1425 | iscsilun->block_size = rc10->block_size; | |
1426 | if (rc10->lba == 0) { | |
1427 | /* blank disk loaded */ | |
1428 | iscsilun->num_blocks = 0; | |
1429 | } else { | |
1430 | iscsilun->num_blocks = rc10->lba + 1; | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | break; | |
1435 | default: | |
f2917853 | 1436 | return; |
cb1b83e7 | 1437 | } |
1288844e PB |
1438 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1439 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1440 | && retries-- > 0); | |
cb1b83e7 | 1441 | |
1288844e | 1442 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
240125bc | 1443 | error_setg(errp, "iSCSI: failed to send readcapacity10/16 command"); |
6d1f252d PL |
1444 | } else if (!iscsilun->block_size || |
1445 | iscsilun->block_size % BDRV_SECTOR_SIZE) { | |
1446 | error_setg(errp, "iSCSI: the target returned an invalid " | |
1447 | "block size of %d.", iscsilun->block_size); | |
1288844e | 1448 | } |
cb1b83e7 PL |
1449 | if (task) { |
1450 | scsi_free_scsi_task(task); | |
1451 | } | |
cb1b83e7 PL |
1452 | } |
1453 | ||
35cb1748 | 1454 | static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, int lun, |
24d3bd67 | 1455 | int evpd, int pc, void **inq, Error **errp) |
35cb1748 PB |
1456 | { |
1457 | int full_size; | |
1458 | struct scsi_task *task = NULL; | |
1459 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64); | |
1460 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1461 | goto fail; | |
1462 | } | |
1463 | full_size = scsi_datain_getfullsize(task); | |
1464 | if (full_size > task->datain.size) { | |
1465 | scsi_free_scsi_task(task); | |
1466 | ||
1467 | /* we need more data for the full list */ | |
1468 | task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); | |
f18a7cbb PL |
1469 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1470 | goto fail; | |
1471 | } | |
35cb1748 | 1472 | } |
f18a7cbb | 1473 | |
24d3bd67 PL |
1474 | *inq = scsi_datain_unmarshall(task); |
1475 | if (*inq == NULL) { | |
1476 | error_setg(errp, "iSCSI: failed to unmarshall inquiry datain blob"); | |
172fc4dd | 1477 | goto fail_with_err; |
24d3bd67 PL |
1478 | } |
1479 | ||
35cb1748 | 1480 | return task; |
f18a7cbb PL |
1481 | |
1482 | fail: | |
172fc4dd MA |
1483 | error_setg(errp, "iSCSI: Inquiry command failed : %s", |
1484 | iscsi_get_error(iscsi)); | |
1485 | fail_with_err: | |
24d3bd67 | 1486 | if (task != NULL) { |
35cb1748 | 1487 | scsi_free_scsi_task(task); |
35cb1748 PB |
1488 | } |
1489 | return NULL; | |
f18a7cbb PL |
1490 | } |
1491 | ||
80cf6257 SH |
1492 | static void iscsi_detach_aio_context(BlockDriverState *bs) |
1493 | { | |
1494 | IscsiLun *iscsilun = bs->opaque; | |
1495 | ||
dca21ef2 | 1496 | aio_set_fd_handler(iscsilun->aio_context, iscsi_get_fd(iscsilun->iscsi), |
f6a51c84 | 1497 | false, NULL, NULL, NULL, NULL); |
80cf6257 SH |
1498 | iscsilun->events = 0; |
1499 | ||
1500 | if (iscsilun->nop_timer) { | |
1501 | timer_del(iscsilun->nop_timer); | |
1502 | timer_free(iscsilun->nop_timer); | |
1503 | iscsilun->nop_timer = NULL; | |
1504 | } | |
05b685fb PL |
1505 | if (iscsilun->event_timer) { |
1506 | timer_del(iscsilun->event_timer); | |
1507 | timer_free(iscsilun->event_timer); | |
1508 | iscsilun->event_timer = NULL; | |
1509 | } | |
80cf6257 SH |
1510 | } |
1511 | ||
1512 | static void iscsi_attach_aio_context(BlockDriverState *bs, | |
1513 | AioContext *new_context) | |
1514 | { | |
1515 | IscsiLun *iscsilun = bs->opaque; | |
1516 | ||
1517 | iscsilun->aio_context = new_context; | |
1518 | iscsi_set_events(iscsilun); | |
1519 | ||
80cf6257 SH |
1520 | /* Set up a timer for sending out iSCSI NOPs */ |
1521 | iscsilun->nop_timer = aio_timer_new(iscsilun->aio_context, | |
1522 | QEMU_CLOCK_REALTIME, SCALE_MS, | |
1523 | iscsi_nop_timed_event, iscsilun); | |
1524 | timer_mod(iscsilun->nop_timer, | |
1525 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
05b685fb | 1526 | |
5dd7a535 PL |
1527 | /* Set up a timer for periodic calls to iscsi_set_events and to |
1528 | * scan for command timeout */ | |
05b685fb PL |
1529 | iscsilun->event_timer = aio_timer_new(iscsilun->aio_context, |
1530 | QEMU_CLOCK_REALTIME, SCALE_MS, | |
5dd7a535 PL |
1531 | iscsi_timed_check_events, iscsilun); |
1532 | timer_mod(iscsilun->event_timer, | |
1533 | qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + EVENT_INTERVAL); | |
80cf6257 SH |
1534 | } |
1535 | ||
7191f208 | 1536 | static void iscsi_modesense_sync(IscsiLun *iscsilun) |
c1d4096b FZ |
1537 | { |
1538 | struct scsi_task *task; | |
1539 | struct scsi_mode_sense *ms = NULL; | |
7191f208 | 1540 | iscsilun->write_protected = false; |
752ce451 | 1541 | iscsilun->dpofua = false; |
c1d4096b FZ |
1542 | |
1543 | task = iscsi_modesense6_sync(iscsilun->iscsi, iscsilun->lun, | |
1544 | 1, SCSI_MODESENSE_PC_CURRENT, | |
1545 | 0x3F, 0, 255); | |
1546 | if (task == NULL) { | |
1547 | error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s", | |
1548 | iscsi_get_error(iscsilun->iscsi)); | |
1549 | goto out; | |
1550 | } | |
1551 | ||
1552 | if (task->status != SCSI_STATUS_GOOD) { | |
1553 | error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable"); | |
1554 | goto out; | |
1555 | } | |
1556 | ms = scsi_datain_unmarshall(task); | |
1557 | if (!ms) { | |
1558 | error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s", | |
1559 | iscsi_get_error(iscsilun->iscsi)); | |
1560 | goto out; | |
1561 | } | |
7191f208 | 1562 | iscsilun->write_protected = ms->device_specific_parameter & 0x80; |
752ce451 | 1563 | iscsilun->dpofua = ms->device_specific_parameter & 0x10; |
c1d4096b FZ |
1564 | |
1565 | out: | |
1566 | if (task) { | |
1567 | scsi_free_scsi_task(task); | |
1568 | } | |
c1d4096b FZ |
1569 | } |
1570 | ||
43171420 KW |
1571 | static void iscsi_parse_iscsi_option(const char *target, QDict *options) |
1572 | { | |
1573 | QemuOptsList *list; | |
1574 | QemuOpts *opts; | |
81aa2a0f | 1575 | const char *user, *password, *password_secret, *initiator_name, |
1d560104 | 1576 | *header_digest, *timeout; |
43171420 KW |
1577 | |
1578 | list = qemu_find_opts("iscsi"); | |
1579 | if (!list) { | |
1580 | return; | |
1581 | } | |
1582 | ||
1583 | opts = qemu_opts_find(list, target); | |
1584 | if (opts == NULL) { | |
1585 | opts = QTAILQ_FIRST(&list->head); | |
1586 | if (!opts) { | |
1587 | return; | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | user = qemu_opt_get(opts, "user"); | |
1592 | if (user) { | |
1593 | qdict_set_default_str(options, "user", user); | |
1594 | } | |
1595 | ||
1596 | password = qemu_opt_get(opts, "password"); | |
1597 | if (password) { | |
1598 | qdict_set_default_str(options, "password", password); | |
1599 | } | |
1600 | ||
1601 | password_secret = qemu_opt_get(opts, "password-secret"); | |
1602 | if (password_secret) { | |
1603 | qdict_set_default_str(options, "password-secret", password_secret); | |
1604 | } | |
d4e79929 KW |
1605 | |
1606 | initiator_name = qemu_opt_get(opts, "initiator-name"); | |
1607 | if (initiator_name) { | |
1608 | qdict_set_default_str(options, "initiator-name", initiator_name); | |
1609 | } | |
81aa2a0f KW |
1610 | |
1611 | header_digest = qemu_opt_get(opts, "header-digest"); | |
1612 | if (header_digest) { | |
31eb1202 KW |
1613 | /* -iscsi takes upper case values, but QAPI only supports lower case |
1614 | * enum constant names, so we have to convert here. */ | |
1615 | char *qapi_value = g_ascii_strdown(header_digest, -1); | |
1616 | qdict_set_default_str(options, "header-digest", qapi_value); | |
1617 | g_free(qapi_value); | |
81aa2a0f | 1618 | } |
1d560104 KW |
1619 | |
1620 | timeout = qemu_opt_get(opts, "timeout"); | |
1621 | if (timeout) { | |
1622 | qdict_set_default_str(options, "timeout", timeout); | |
1623 | } | |
43171420 KW |
1624 | } |
1625 | ||
c589b249 RS |
1626 | /* |
1627 | * We support iscsi url's on the form | |
1628 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1629 | */ | |
d5895fcb KW |
1630 | static void iscsi_parse_filename(const char *filename, QDict *options, |
1631 | Error **errp) | |
1632 | { | |
1633 | struct iscsi_url *iscsi_url; | |
1634 | const char *transport_name; | |
1635 | char *lun_str; | |
1636 | ||
1637 | iscsi_url = iscsi_parse_full_url(NULL, filename); | |
1638 | if (iscsi_url == NULL) { | |
1639 | error_setg(errp, "Failed to parse URL : %s", filename); | |
1640 | return; | |
1641 | } | |
1642 | ||
1643 | #if LIBISCSI_API_VERSION >= (20160603) | |
1644 | switch (iscsi_url->transport) { | |
1645 | case TCP_TRANSPORT: | |
1646 | transport_name = "tcp"; | |
1647 | break; | |
1648 | case ISER_TRANSPORT: | |
1649 | transport_name = "iser"; | |
1650 | break; | |
1651 | default: | |
1652 | error_setg(errp, "Unknown transport type (%d)", | |
1653 | iscsi_url->transport); | |
1654 | return; | |
1655 | } | |
1656 | #else | |
1657 | transport_name = "tcp"; | |
1658 | #endif | |
1659 | ||
1660 | qdict_set_default_str(options, "transport", transport_name); | |
1661 | qdict_set_default_str(options, "portal", iscsi_url->portal); | |
1662 | qdict_set_default_str(options, "target", iscsi_url->target); | |
1663 | ||
1664 | lun_str = g_strdup_printf("%d", iscsi_url->lun); | |
1665 | qdict_set_default_str(options, "lun", lun_str); | |
1666 | g_free(lun_str); | |
1667 | ||
43171420 KW |
1668 | /* User/password from -iscsi take precedence over those from the URL */ |
1669 | iscsi_parse_iscsi_option(iscsi_url->target, options); | |
1670 | ||
d5895fcb KW |
1671 | if (iscsi_url->user[0] != '\0') { |
1672 | qdict_set_default_str(options, "user", iscsi_url->user); | |
1673 | qdict_set_default_str(options, "password", iscsi_url->passwd); | |
1674 | } | |
1675 | ||
1676 | iscsi_destroy_url(iscsi_url); | |
1677 | } | |
1678 | ||
d5895fcb KW |
1679 | static QemuOptsList runtime_opts = { |
1680 | .name = "iscsi", | |
1681 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1682 | .desc = { | |
1683 | { | |
1684 | .name = "transport", | |
1685 | .type = QEMU_OPT_STRING, | |
1686 | }, | |
1687 | { | |
1688 | .name = "portal", | |
1689 | .type = QEMU_OPT_STRING, | |
1690 | }, | |
1691 | { | |
1692 | .name = "target", | |
1693 | .type = QEMU_OPT_STRING, | |
1694 | }, | |
1695 | { | |
1696 | .name = "user", | |
1697 | .type = QEMU_OPT_STRING, | |
1698 | }, | |
1699 | { | |
1700 | .name = "password", | |
1701 | .type = QEMU_OPT_STRING, | |
1702 | }, | |
43171420 KW |
1703 | { |
1704 | .name = "password-secret", | |
1705 | .type = QEMU_OPT_STRING, | |
1706 | }, | |
d5895fcb KW |
1707 | { |
1708 | .name = "lun", | |
1709 | .type = QEMU_OPT_NUMBER, | |
1710 | }, | |
d4e79929 KW |
1711 | { |
1712 | .name = "initiator-name", | |
1713 | .type = QEMU_OPT_STRING, | |
1714 | }, | |
81aa2a0f KW |
1715 | { |
1716 | .name = "header-digest", | |
1717 | .type = QEMU_OPT_STRING, | |
1718 | }, | |
1d560104 KW |
1719 | { |
1720 | .name = "timeout", | |
1721 | .type = QEMU_OPT_NUMBER, | |
1722 | }, | |
5c3ad1a6 JC |
1723 | { |
1724 | .name = "filename", | |
1725 | .type = QEMU_OPT_STRING, | |
1726 | }, | |
d5895fcb KW |
1727 | { /* end of list */ } |
1728 | }, | |
1729 | }; | |
1730 | ||
015a1036 HR |
1731 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags, |
1732 | Error **errp) | |
c589b249 RS |
1733 | { |
1734 | IscsiLun *iscsilun = bs->opaque; | |
1735 | struct iscsi_context *iscsi = NULL; | |
e829b0bb PL |
1736 | struct scsi_task *task = NULL; |
1737 | struct scsi_inquiry_standard *inq = NULL; | |
24d3bd67 | 1738 | struct scsi_inquiry_supported_pages *inq_vpd; |
f9dadc98 | 1739 | char *initiator_name = NULL; |
60beb341 KW |
1740 | QemuOpts *opts; |
1741 | Error *local_err = NULL; | |
5c3ad1a6 | 1742 | const char *transport_name, *portal, *target, *filename; |
d5895fcb KW |
1743 | #if LIBISCSI_API_VERSION >= (20160603) |
1744 | enum iscsi_transport_type transport; | |
1745 | #endif | |
1746 | int i, ret = 0, timeout = 0, lun; | |
c589b249 | 1747 | |
5c3ad1a6 JC |
1748 | /* If we are given a filename, parse the filename, with precedence given to |
1749 | * filename encoded options */ | |
1750 | filename = qdict_get_try_str(options, "filename"); | |
1751 | if (filename) { | |
3dc6f869 AF |
1752 | warn_report("'filename' option specified. " |
1753 | "This is an unsupported option, and may be deprecated " | |
1754 | "in the future"); | |
5c3ad1a6 JC |
1755 | iscsi_parse_filename(filename, options, &local_err); |
1756 | if (local_err) { | |
1757 | ret = -EINVAL; | |
1758 | error_propagate(errp, local_err); | |
1759 | goto exit; | |
1760 | } | |
1761 | } | |
1762 | ||
87ea75d5 | 1763 | opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); |
60beb341 | 1764 | qemu_opts_absorb_qdict(opts, options, &local_err); |
84d18f06 | 1765 | if (local_err) { |
f2917853 | 1766 | error_propagate(errp, local_err); |
60beb341 KW |
1767 | ret = -EINVAL; |
1768 | goto out; | |
1769 | } | |
1770 | ||
d5895fcb KW |
1771 | transport_name = qemu_opt_get(opts, "transport"); |
1772 | portal = qemu_opt_get(opts, "portal"); | |
1773 | target = qemu_opt_get(opts, "target"); | |
d5895fcb | 1774 | lun = qemu_opt_get_number(opts, "lun", 0); |
60beb341 | 1775 | |
d5895fcb KW |
1776 | if (!transport_name || !portal || !target) { |
1777 | error_setg(errp, "Need all of transport, portal and target options"); | |
1778 | ret = -EINVAL; | |
1779 | goto out; | |
1780 | } | |
d5895fcb KW |
1781 | |
1782 | if (!strcmp(transport_name, "tcp")) { | |
1783 | #if LIBISCSI_API_VERSION >= (20160603) | |
1784 | transport = TCP_TRANSPORT; | |
1785 | } else if (!strcmp(transport_name, "iser")) { | |
1786 | transport = ISER_TRANSPORT; | |
1787 | #else | |
1788 | /* TCP is what older libiscsi versions always use */ | |
1789 | #endif | |
1790 | } else { | |
1791 | error_setg(errp, "Unknown transport: %s", transport_name); | |
c589b249 | 1792 | ret = -EINVAL; |
b93c94f7 | 1793 | goto out; |
c589b249 RS |
1794 | } |
1795 | ||
f9dadc98 RS |
1796 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1797 | ||
d4e79929 | 1798 | initiator_name = get_initiator_name(opts); |
f9dadc98 RS |
1799 | |
1800 | iscsi = iscsi_create_context(initiator_name); | |
1801 | if (iscsi == NULL) { | |
f2917853 | 1802 | error_setg(errp, "iSCSI: Failed to create iSCSI context."); |
f9dadc98 | 1803 | ret = -ENOMEM; |
b93c94f7 | 1804 | goto out; |
f9dadc98 | 1805 | } |
e0ae4987 | 1806 | #if LIBISCSI_API_VERSION >= (20160603) |
d5895fcb | 1807 | if (iscsi_init_transport(iscsi, transport)) { |
e0ae4987 RS |
1808 | error_setg(errp, ("Error initializing transport.")); |
1809 | ret = -EINVAL; | |
1810 | goto out; | |
1811 | } | |
1812 | #endif | |
d5895fcb | 1813 | if (iscsi_set_targetname(iscsi, target)) { |
f2917853 | 1814 | error_setg(errp, "iSCSI: Failed to set target name."); |
c589b249 | 1815 | ret = -EINVAL; |
b93c94f7 | 1816 | goto out; |
c589b249 RS |
1817 | } |
1818 | ||
f9dadc98 | 1819 | /* check if we got CHAP username/password via the options */ |
43171420 | 1820 | apply_chap(iscsi, opts, &local_err); |
f2917853 PB |
1821 | if (local_err != NULL) { |
1822 | error_propagate(errp, local_err); | |
f9dadc98 | 1823 | ret = -EINVAL; |
b93c94f7 | 1824 | goto out; |
f9dadc98 RS |
1825 | } |
1826 | ||
c589b249 | 1827 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
f2917853 | 1828 | error_setg(errp, "iSCSI: Failed to set session type to normal."); |
c589b249 | 1829 | ret = -EINVAL; |
b93c94f7 | 1830 | goto out; |
c589b249 RS |
1831 | } |
1832 | ||
f9dadc98 | 1833 | /* check if we got HEADER_DIGEST via the options */ |
81aa2a0f | 1834 | apply_header_digest(iscsi, opts, &local_err); |
f2917853 PB |
1835 | if (local_err != NULL) { |
1836 | error_propagate(errp, local_err); | |
1837 | ret = -EINVAL; | |
1838 | goto out; | |
1839 | } | |
f9dadc98 | 1840 | |
9049736e | 1841 | /* timeout handling is broken in libiscsi before 1.15.0 */ |
1d560104 | 1842 | timeout = qemu_opt_get_number(opts, "timeout", 0); |
583ec22e | 1843 | #if LIBISCSI_API_VERSION >= 20150621 |
9049736e PL |
1844 | iscsi_set_timeout(iscsi, timeout); |
1845 | #else | |
1846 | if (timeout) { | |
1847 | error_report("iSCSI: ignoring timeout value for libiscsi <1.15.0"); | |
1848 | } | |
1849 | #endif | |
5dd7a535 | 1850 | |
d5895fcb | 1851 | if (iscsi_full_connect_sync(iscsi, portal, lun) != 0) { |
f2917853 | 1852 | error_setg(errp, "iSCSI: Failed to connect to LUN : %s", |
e829b0bb PL |
1853 | iscsi_get_error(iscsi)); |
1854 | ret = -EINVAL; | |
1855 | goto out; | |
1856 | } | |
c589b249 RS |
1857 | |
1858 | iscsilun->iscsi = iscsi; | |
80cf6257 | 1859 | iscsilun->aio_context = bdrv_get_aio_context(bs); |
d5895fcb | 1860 | iscsilun->lun = lun; |
24d3bd67 | 1861 | iscsilun->has_write_same = true; |
c589b249 | 1862 | |
24d3bd67 PL |
1863 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 0, 0, |
1864 | (void **) &inq, errp); | |
1865 | if (task == NULL) { | |
c589b249 | 1866 | ret = -EINVAL; |
b93c94f7 | 1867 | goto out; |
c589b249 | 1868 | } |
e829b0bb | 1869 | iscsilun->type = inq->periperal_device_type; |
24d3bd67 PL |
1870 | scsi_free_scsi_task(task); |
1871 | task = NULL; | |
e829b0bb | 1872 | |
7191f208 | 1873 | iscsi_modesense_sync(iscsilun); |
4df863f3 EB |
1874 | if (iscsilun->dpofua) { |
1875 | bs->supported_write_flags = BDRV_REQ_FUA; | |
1876 | } | |
465fe887 | 1877 | bs->supported_zero_flags = BDRV_REQ_MAY_UNMAP; |
7191f208 | 1878 | |
c1d4096b FZ |
1879 | /* Check the write protect flag of the LUN if we want to write */ |
1880 | if (iscsilun->type == TYPE_DISK && (flags & BDRV_O_RDWR) && | |
43ae8fb1 | 1881 | iscsilun->write_protected) { |
c1d4096b FZ |
1882 | error_setg(errp, "Cannot open a write protected LUN as read-write"); |
1883 | ret = -EACCES; | |
1884 | goto out; | |
1885 | } | |
1886 | ||
f2917853 PB |
1887 | iscsi_readcapacity_sync(iscsilun, &local_err); |
1888 | if (local_err != NULL) { | |
1889 | error_propagate(errp, local_err); | |
cd82b6fb | 1890 | ret = -EINVAL; |
cb1b83e7 | 1891 | goto out; |
e829b0bb | 1892 | } |
0777b5dd | 1893 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
e829b0bb | 1894 | |
f47c3f5a KW |
1895 | /* We don't have any emulation for devices other than disks and CD-ROMs, so |
1896 | * this must be sg ioctl compatible. We force it to be sg, otherwise qemu | |
1897 | * will try to read from the device to guess the image format. | |
622695a4 | 1898 | */ |
f47c3f5a | 1899 | if (iscsilun->type != TYPE_DISK && iscsilun->type != TYPE_ROM) { |
54115412 | 1900 | bs->sg = true; |
622695a4 RS |
1901 | } |
1902 | ||
24d3bd67 PL |
1903 | task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, |
1904 | SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES, | |
1905 | (void **) &inq_vpd, errp); | |
1906 | if (task == NULL) { | |
1907 | ret = -EINVAL; | |
1908 | goto out; | |
f18a7cbb | 1909 | } |
24d3bd67 PL |
1910 | for (i = 0; i < inq_vpd->num_pages; i++) { |
1911 | struct scsi_task *inq_task; | |
1912 | struct scsi_inquiry_logical_block_provisioning *inq_lbp; | |
f18a7cbb | 1913 | struct scsi_inquiry_block_limits *inq_bl; |
24d3bd67 PL |
1914 | switch (inq_vpd->pages[i]) { |
1915 | case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING: | |
1916 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1917 | SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING, | |
1918 | (void **) &inq_lbp, errp); | |
1919 | if (inq_task == NULL) { | |
1920 | ret = -EINVAL; | |
1921 | goto out; | |
1922 | } | |
1923 | memcpy(&iscsilun->lbp, inq_lbp, | |
1924 | sizeof(struct scsi_inquiry_logical_block_provisioning)); | |
1925 | scsi_free_scsi_task(inq_task); | |
1926 | break; | |
1927 | case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS: | |
1928 | inq_task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1, | |
1929 | SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS, | |
1930 | (void **) &inq_bl, errp); | |
1931 | if (inq_task == NULL) { | |
1932 | ret = -EINVAL; | |
1933 | goto out; | |
1934 | } | |
1935 | memcpy(&iscsilun->bl, inq_bl, | |
1936 | sizeof(struct scsi_inquiry_block_limits)); | |
1937 | scsi_free_scsi_task(inq_task); | |
1938 | break; | |
1939 | default: | |
1940 | break; | |
f18a7cbb | 1941 | } |
f18a7cbb | 1942 | } |
24d3bd67 PL |
1943 | scsi_free_scsi_task(task); |
1944 | task = NULL; | |
f18a7cbb | 1945 | |
d045c466 | 1946 | qemu_mutex_init(&iscsilun->mutex); |
80cf6257 | 1947 | iscsi_attach_aio_context(bs, iscsilun->aio_context); |
5b5d34ec | 1948 | |
b03c3805 PL |
1949 | /* Guess the internal cluster (page) size of the iscsi target by the means |
1950 | * of opt_unmap_gran. Transfer the unmap granularity only if it has a | |
1951 | * reasonable size */ | |
3d2acaa3 | 1952 | if (iscsilun->bl.opt_unmap_gran * iscsilun->block_size >= 4 * 1024 && |
b03c3805 PL |
1953 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size <= 16 * 1024 * 1024) { |
1954 | iscsilun->cluster_sectors = (iscsilun->bl.opt_unmap_gran * | |
1955 | iscsilun->block_size) >> BDRV_SECTOR_BITS; | |
9eac3622 | 1956 | if (iscsilun->lbprz) { |
e1123a3b | 1957 | ret = iscsi_allocmap_init(iscsilun, bs->open_flags); |
b03c3805 | 1958 | } |
b03c3805 PL |
1959 | } |
1960 | ||
b93c94f7 | 1961 | out: |
60beb341 | 1962 | qemu_opts_del(opts); |
f7047c2d | 1963 | g_free(initiator_name); |
e829b0bb PL |
1964 | if (task != NULL) { |
1965 | scsi_free_scsi_task(task); | |
1966 | } | |
b93c94f7 PB |
1967 | |
1968 | if (ret) { | |
1969 | if (iscsi != NULL) { | |
20474e9a PL |
1970 | if (iscsi_is_logged_in(iscsi)) { |
1971 | iscsi_logout_sync(iscsi); | |
1972 | } | |
b93c94f7 PB |
1973 | iscsi_destroy_context(iscsi); |
1974 | } | |
1975 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1976 | } |
5c3ad1a6 | 1977 | exit: |
c589b249 RS |
1978 | return ret; |
1979 | } | |
1980 | ||
1981 | static void iscsi_close(BlockDriverState *bs) | |
1982 | { | |
1983 | IscsiLun *iscsilun = bs->opaque; | |
1984 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1985 | ||
80cf6257 | 1986 | iscsi_detach_aio_context(bs); |
20474e9a PL |
1987 | if (iscsi_is_logged_in(iscsi)) { |
1988 | iscsi_logout_sync(iscsi); | |
1989 | } | |
c589b249 | 1990 | iscsi_destroy_context(iscsi); |
d4cd9615 | 1991 | g_free(iscsilun->zeroblock); |
e1123a3b | 1992 | iscsi_allocmap_free(iscsilun); |
d045c466 | 1993 | qemu_mutex_destroy(&iscsilun->mutex); |
c589b249 RS |
1994 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1995 | } | |
1996 | ||
52f6fa14 PL |
1997 | static void iscsi_refresh_limits(BlockDriverState *bs, Error **errp) |
1998 | { | |
d34682cd KW |
1999 | /* We don't actually refresh here, but just return data queried in |
2000 | * iscsi_open(): iscsi targets don't change their limits. */ | |
52f6fa14 PL |
2001 | |
2002 | IscsiLun *iscsilun = bs->opaque; | |
5def6b80 | 2003 | uint64_t max_xfer_len = iscsilun->use_16_for_rw ? 0xffffffff : 0xffff; |
95eaa785 | 2004 | unsigned int block_size = MAX(BDRV_SECTOR_SIZE, iscsilun->block_size); |
52f6fa14 | 2005 | |
95eaa785 EB |
2006 | assert(iscsilun->block_size >= BDRV_SECTOR_SIZE || bs->sg); |
2007 | ||
2008 | bs->bl.request_alignment = block_size; | |
c8b3b998 | 2009 | |
52f6fa14 PL |
2010 | if (iscsilun->bl.max_xfer_len) { |
2011 | max_xfer_len = MIN(max_xfer_len, iscsilun->bl.max_xfer_len); | |
2012 | } | |
2013 | ||
95eaa785 | 2014 | if (max_xfer_len * block_size < INT_MAX) { |
5def6b80 EB |
2015 | bs->bl.max_transfer = max_xfer_len * iscsilun->block_size; |
2016 | } | |
52f6fa14 | 2017 | |
c97ca29d | 2018 | if (iscsilun->lbp.lbpu) { |
95eaa785 | 2019 | if (iscsilun->bl.max_unmap < 0xffffffff / block_size) { |
b9f7855a EB |
2020 | bs->bl.max_pdiscard = |
2021 | iscsilun->bl.max_unmap * iscsilun->block_size; | |
d34682cd | 2022 | } |
b9f7855a EB |
2023 | bs->bl.pdiscard_alignment = |
2024 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size; | |
8b184744 | 2025 | } else { |
b9f7855a | 2026 | bs->bl.pdiscard_alignment = iscsilun->block_size; |
c97ca29d | 2027 | } |
d34682cd | 2028 | |
95eaa785 | 2029 | if (iscsilun->bl.max_ws_len < 0xffffffff / block_size) { |
cf081fca EB |
2030 | bs->bl.max_pwrite_zeroes = |
2031 | iscsilun->bl.max_ws_len * iscsilun->block_size; | |
c97ca29d PB |
2032 | } |
2033 | if (iscsilun->lbp.lbpws) { | |
cf081fca EB |
2034 | bs->bl.pwrite_zeroes_alignment = |
2035 | iscsilun->bl.opt_unmap_gran * iscsilun->block_size; | |
8b184744 | 2036 | } else { |
cf081fca | 2037 | bs->bl.pwrite_zeroes_alignment = iscsilun->block_size; |
d34682cd | 2038 | } |
5def6b80 | 2039 | if (iscsilun->bl.opt_xfer_len && |
95eaa785 | 2040 | iscsilun->bl.opt_xfer_len < INT_MAX / block_size) { |
5def6b80 EB |
2041 | bs->bl.opt_transfer = pow2floor(iscsilun->bl.opt_xfer_len * |
2042 | iscsilun->block_size); | |
2043 | } | |
e9f526ab | 2044 | } |
d34682cd | 2045 | |
43ae8fb1 FZ |
2046 | /* Note that this will not re-establish a connection with an iSCSI target - it |
2047 | * is effectively a NOP. */ | |
dc6afb99 JC |
2048 | static int iscsi_reopen_prepare(BDRVReopenState *state, |
2049 | BlockReopenQueue *queue, Error **errp) | |
2050 | { | |
43ae8fb1 FZ |
2051 | IscsiLun *iscsilun = state->bs->opaque; |
2052 | ||
2053 | if (state->flags & BDRV_O_RDWR && iscsilun->write_protected) { | |
2054 | error_setg(errp, "Cannot open a write protected LUN as read-write"); | |
2055 | return -EACCES; | |
2056 | } | |
d34682cd KW |
2057 | return 0; |
2058 | } | |
2059 | ||
e1123a3b PL |
2060 | static void iscsi_reopen_commit(BDRVReopenState *reopen_state) |
2061 | { | |
2062 | IscsiLun *iscsilun = reopen_state->bs->opaque; | |
2063 | ||
2064 | /* the cache.direct status might have changed */ | |
2065 | if (iscsilun->allocmap != NULL) { | |
2066 | iscsi_allocmap_init(iscsilun, reopen_state->flags); | |
2067 | } | |
2068 | } | |
2069 | ||
8243ccb7 HR |
2070 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset, |
2071 | PreallocMode prealloc, Error **errp) | |
cb1b83e7 PL |
2072 | { |
2073 | IscsiLun *iscsilun = bs->opaque; | |
f2917853 | 2074 | Error *local_err = NULL; |
cb1b83e7 | 2075 | |
8243ccb7 HR |
2076 | if (prealloc != PREALLOC_MODE_OFF) { |
2077 | error_setg(errp, "Unsupported preallocation mode '%s'", | |
977c736f | 2078 | PreallocMode_str(prealloc)); |
8243ccb7 HR |
2079 | return -ENOTSUP; |
2080 | } | |
2081 | ||
cb1b83e7 | 2082 | if (iscsilun->type != TYPE_DISK) { |
f59adb32 | 2083 | error_setg(errp, "Cannot resize non-disk iSCSI devices"); |
cb1b83e7 PL |
2084 | return -ENOTSUP; |
2085 | } | |
2086 | ||
f2917853 PB |
2087 | iscsi_readcapacity_sync(iscsilun, &local_err); |
2088 | if (local_err != NULL) { | |
4bff28b8 | 2089 | error_propagate(errp, local_err); |
f2917853 | 2090 | return -EIO; |
cb1b83e7 PL |
2091 | } |
2092 | ||
2093 | if (offset > iscsi_getlength(bs)) { | |
f59adb32 | 2094 | error_setg(errp, "Cannot grow iSCSI devices"); |
cb1b83e7 PL |
2095 | return -EINVAL; |
2096 | } | |
2097 | ||
e1123a3b PL |
2098 | if (iscsilun->allocmap != NULL) { |
2099 | iscsi_allocmap_init(iscsilun, bs->open_flags); | |
b03c3805 PL |
2100 | } |
2101 | ||
cb1b83e7 PL |
2102 | return 0; |
2103 | } | |
2104 | ||
a59479e3 | 2105 | static int iscsi_create(const char *filename, QemuOpts *opts, Error **errp) |
de8864e5 PL |
2106 | { |
2107 | int ret = 0; | |
2108 | int64_t total_size = 0; | |
13c91cb7 | 2109 | BlockDriverState *bs; |
de8864e5 | 2110 | IscsiLun *iscsilun = NULL; |
60beb341 | 2111 | QDict *bs_options; |
2ec9a782 | 2112 | Error *local_err = NULL; |
de8864e5 | 2113 | |
e4e9986b | 2114 | bs = bdrv_new(); |
de8864e5 PL |
2115 | |
2116 | /* Read out options */ | |
c2eb918e HT |
2117 | total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
2118 | BDRV_SECTOR_SIZE); | |
5839e53b | 2119 | bs->opaque = g_new0(struct IscsiLun, 1); |
13c91cb7 | 2120 | iscsilun = bs->opaque; |
de8864e5 | 2121 | |
60beb341 | 2122 | bs_options = qdict_new(); |
2ec9a782 FZ |
2123 | iscsi_parse_filename(filename, bs_options, &local_err); |
2124 | if (local_err) { | |
2125 | error_propagate(errp, local_err); | |
2126 | ret = -EINVAL; | |
2127 | } else { | |
2128 | ret = iscsi_open(bs, bs_options, 0, NULL); | |
2129 | } | |
60beb341 KW |
2130 | QDECREF(bs_options); |
2131 | ||
de8864e5 PL |
2132 | if (ret != 0) { |
2133 | goto out; | |
2134 | } | |
80cf6257 | 2135 | iscsi_detach_aio_context(bs); |
de8864e5 PL |
2136 | if (iscsilun->type != TYPE_DISK) { |
2137 | ret = -ENODEV; | |
2138 | goto out; | |
2139 | } | |
13c91cb7 | 2140 | if (bs->total_sectors < total_size) { |
de8864e5 | 2141 | ret = -ENOSPC; |
d3bda7bc | 2142 | goto out; |
de8864e5 PL |
2143 | } |
2144 | ||
2145 | ret = 0; | |
2146 | out: | |
2147 | if (iscsilun->iscsi != NULL) { | |
2148 | iscsi_destroy_context(iscsilun->iscsi); | |
2149 | } | |
13c91cb7 FZ |
2150 | g_free(bs->opaque); |
2151 | bs->opaque = NULL; | |
4f6fd349 | 2152 | bdrv_unref(bs); |
de8864e5 PL |
2153 | return ret; |
2154 | } | |
2155 | ||
186d4f2b PL |
2156 | static int iscsi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
2157 | { | |
2158 | IscsiLun *iscsilun = bs->opaque; | |
0a386e48 | 2159 | bdi->unallocated_blocks_are_zero = iscsilun->lbprz; |
186d4f2b | 2160 | bdi->can_write_zeroes_with_unmap = iscsilun->lbprz && iscsilun->lbp.lbpws; |
b03c3805 | 2161 | bdi->cluster_size = iscsilun->cluster_sectors * BDRV_SECTOR_SIZE; |
186d4f2b PL |
2162 | return 0; |
2163 | } | |
2164 | ||
e1123a3b PL |
2165 | static void iscsi_invalidate_cache(BlockDriverState *bs, |
2166 | Error **errp) | |
2167 | { | |
2168 | IscsiLun *iscsilun = bs->opaque; | |
2169 | iscsi_allocmap_invalidate(iscsilun); | |
2170 | } | |
2171 | ||
a59479e3 CL |
2172 | static QemuOptsList iscsi_create_opts = { |
2173 | .name = "iscsi-create-opts", | |
2174 | .head = QTAILQ_HEAD_INITIALIZER(iscsi_create_opts.head), | |
2175 | .desc = { | |
2176 | { | |
2177 | .name = BLOCK_OPT_SIZE, | |
2178 | .type = QEMU_OPT_SIZE, | |
2179 | .help = "Virtual disk size" | |
2180 | }, | |
2181 | { /* end of list */ } | |
2182 | } | |
de8864e5 PL |
2183 | }; |
2184 | ||
c589b249 RS |
2185 | static BlockDriver bdrv_iscsi = { |
2186 | .format_name = "iscsi", | |
2187 | .protocol_name = "iscsi", | |
2188 | ||
d5895fcb KW |
2189 | .instance_size = sizeof(IscsiLun), |
2190 | .bdrv_parse_filename = iscsi_parse_filename, | |
2191 | .bdrv_file_open = iscsi_open, | |
2192 | .bdrv_close = iscsi_close, | |
2193 | .bdrv_create = iscsi_create, | |
2194 | .create_opts = &iscsi_create_opts, | |
2195 | .bdrv_reopen_prepare = iscsi_reopen_prepare, | |
2196 | .bdrv_reopen_commit = iscsi_reopen_commit, | |
2197 | .bdrv_invalidate_cache = iscsi_invalidate_cache, | |
c589b249 RS |
2198 | |
2199 | .bdrv_getlength = iscsi_getlength, | |
186d4f2b | 2200 | .bdrv_get_info = iscsi_get_info, |
cb1b83e7 | 2201 | .bdrv_truncate = iscsi_truncate, |
d34682cd | 2202 | .bdrv_refresh_limits = iscsi_refresh_limits, |
c589b249 | 2203 | |
54a5c1d5 | 2204 | .bdrv_co_get_block_status = iscsi_co_get_block_status, |
97c7e85c | 2205 | .bdrv_co_pdiscard = iscsi_co_pdiscard, |
94d047a3 | 2206 | .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes, |
063c3378 | 2207 | .bdrv_co_readv = iscsi_co_readv, |
9f0eb9e1 | 2208 | .bdrv_co_writev_flags = iscsi_co_writev_flags, |
063c3378 | 2209 | .bdrv_co_flush_to_disk = iscsi_co_flush, |
fa6acb0c | 2210 | |
98392453 | 2211 | #ifdef __linux__ |
98392453 RS |
2212 | .bdrv_aio_ioctl = iscsi_aio_ioctl, |
2213 | #endif | |
80cf6257 SH |
2214 | |
2215 | .bdrv_detach_aio_context = iscsi_detach_aio_context, | |
2216 | .bdrv_attach_aio_context = iscsi_attach_aio_context, | |
c589b249 RS |
2217 | }; |
2218 | ||
e0ae4987 RS |
2219 | #if LIBISCSI_API_VERSION >= (20160603) |
2220 | static BlockDriver bdrv_iser = { | |
2221 | .format_name = "iser", | |
2222 | .protocol_name = "iser", | |
2223 | ||
d5895fcb KW |
2224 | .instance_size = sizeof(IscsiLun), |
2225 | .bdrv_parse_filename = iscsi_parse_filename, | |
2226 | .bdrv_file_open = iscsi_open, | |
2227 | .bdrv_close = iscsi_close, | |
2228 | .bdrv_create = iscsi_create, | |
2229 | .create_opts = &iscsi_create_opts, | |
2230 | .bdrv_reopen_prepare = iscsi_reopen_prepare, | |
2231 | .bdrv_reopen_commit = iscsi_reopen_commit, | |
2232 | .bdrv_invalidate_cache = iscsi_invalidate_cache, | |
e0ae4987 RS |
2233 | |
2234 | .bdrv_getlength = iscsi_getlength, | |
2235 | .bdrv_get_info = iscsi_get_info, | |
2236 | .bdrv_truncate = iscsi_truncate, | |
2237 | .bdrv_refresh_limits = iscsi_refresh_limits, | |
2238 | ||
2239 | .bdrv_co_get_block_status = iscsi_co_get_block_status, | |
2240 | .bdrv_co_pdiscard = iscsi_co_pdiscard, | |
2241 | .bdrv_co_pwrite_zeroes = iscsi_co_pwrite_zeroes, | |
2242 | .bdrv_co_readv = iscsi_co_readv, | |
2243 | .bdrv_co_writev_flags = iscsi_co_writev_flags, | |
2244 | .bdrv_co_flush_to_disk = iscsi_co_flush, | |
2245 | ||
2246 | #ifdef __linux__ | |
2247 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
2248 | #endif | |
2249 | ||
2250 | .bdrv_detach_aio_context = iscsi_detach_aio_context, | |
2251 | .bdrv_attach_aio_context = iscsi_attach_aio_context, | |
2252 | }; | |
2253 | #endif | |
2254 | ||
c589b249 RS |
2255 | static void iscsi_block_init(void) |
2256 | { | |
2257 | bdrv_register(&bdrv_iscsi); | |
e0ae4987 RS |
2258 | #if LIBISCSI_API_VERSION >= (20160603) |
2259 | bdrv_register(&bdrv_iser); | |
2260 | #endif | |
c589b249 RS |
2261 | } |
2262 | ||
2263 | block_init(iscsi_block_init); |