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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> | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #include "config-host.h" | |
26 | ||
27 | #include <poll.h> | |
f4dfa67f | 28 | #include <arpa/inet.h> |
c589b249 | 29 | #include "qemu-common.h" |
1de7afc9 PB |
30 | #include "qemu/config-file.h" |
31 | #include "qemu/error-report.h" | |
737e150e | 32 | #include "block/block_int.h" |
c589b249 | 33 | #include "trace.h" |
0d09e41a | 34 | #include "block/scsi.h" |
0a53f010 | 35 | #include "qemu/iov.h" |
c589b249 RS |
36 | |
37 | #include <iscsi/iscsi.h> | |
38 | #include <iscsi/scsi-lowlevel.h> | |
39 | ||
98392453 RS |
40 | #ifdef __linux__ |
41 | #include <scsi/sg.h> | |
0d09e41a | 42 | #include <block/scsi.h> |
98392453 | 43 | #endif |
c589b249 RS |
44 | |
45 | typedef struct IscsiLun { | |
46 | struct iscsi_context *iscsi; | |
47 | int lun; | |
dbfff6d7 | 48 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 49 | int block_size; |
c7b4a952 | 50 | uint64_t num_blocks; |
c9b9f682 | 51 | int events; |
5b5d34ec | 52 | QEMUTimer *nop_timer; |
c589b249 RS |
53 | } IscsiLun; |
54 | ||
55 | typedef struct IscsiAIOCB { | |
56 | BlockDriverAIOCB common; | |
57 | QEMUIOVector *qiov; | |
58 | QEMUBH *bh; | |
59 | IscsiLun *iscsilun; | |
60 | struct scsi_task *task; | |
61 | uint8_t *buf; | |
62 | int status; | |
63 | int canceled; | |
1dde716e | 64 | int retries; |
c589b249 RS |
65 | size_t read_size; |
66 | size_t read_offset; | |
1dde716e PL |
67 | int64_t sector_num; |
68 | int nb_sectors; | |
98392453 RS |
69 | #ifdef __linux__ |
70 | sg_io_hdr_t *ioh; | |
71 | #endif | |
c589b249 RS |
72 | } IscsiAIOCB; |
73 | ||
5b5d34ec PL |
74 | #define NOP_INTERVAL 5000 |
75 | #define MAX_NOP_FAILURES 3 | |
1dde716e | 76 | #define ISCSI_CMD_RETRIES 5 |
5b5d34ec | 77 | |
27cbd828 | 78 | static void |
cfb3f506 | 79 | iscsi_bh_cb(void *p) |
27cbd828 PB |
80 | { |
81 | IscsiAIOCB *acb = p; | |
82 | ||
83 | qemu_bh_delete(acb->bh); | |
84 | ||
4790b03d PB |
85 | g_free(acb->buf); |
86 | acb->buf = NULL; | |
87 | ||
27cbd828 PB |
88 | if (acb->canceled == 0) { |
89 | acb->common.cb(acb->common.opaque, acb->status); | |
90 | } | |
91 | ||
1bd075f2 PB |
92 | if (acb->task != NULL) { |
93 | scsi_free_scsi_task(acb->task); | |
94 | acb->task = NULL; | |
95 | } | |
96 | ||
27cbd828 PB |
97 | qemu_aio_release(acb); |
98 | } | |
99 | ||
cfb3f506 PB |
100 | static void |
101 | iscsi_schedule_bh(IscsiAIOCB *acb) | |
27cbd828 | 102 | { |
1bd075f2 PB |
103 | if (acb->bh) { |
104 | return; | |
105 | } | |
cfb3f506 | 106 | acb->bh = qemu_bh_new(iscsi_bh_cb, acb); |
27cbd828 | 107 | qemu_bh_schedule(acb->bh); |
27cbd828 PB |
108 | } |
109 | ||
110 | ||
c589b249 RS |
111 | static void |
112 | iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, | |
113 | void *private_data) | |
114 | { | |
1bd075f2 PB |
115 | IscsiAIOCB *acb = private_data; |
116 | ||
117 | acb->status = -ECANCELED; | |
118 | iscsi_schedule_bh(acb); | |
c589b249 RS |
119 | } |
120 | ||
121 | static void | |
122 | iscsi_aio_cancel(BlockDriverAIOCB *blockacb) | |
123 | { | |
124 | IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; | |
125 | IscsiLun *iscsilun = acb->iscsilun; | |
126 | ||
1bd075f2 PB |
127 | if (acb->status != -EINPROGRESS) { |
128 | return; | |
129 | } | |
130 | ||
b2090919 | 131 | acb->canceled = 1; |
c589b249 | 132 | |
b2090919 | 133 | /* send a task mgmt call to the target to cancel the task on the target */ |
64e69e80 | 134 | iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
1bd075f2 | 135 | iscsi_abort_task_cb, acb); |
b2090919 | 136 | |
1bd075f2 PB |
137 | while (acb->status == -EINPROGRESS) { |
138 | qemu_aio_wait(); | |
139 | } | |
c589b249 RS |
140 | } |
141 | ||
d7331bed | 142 | static const AIOCBInfo iscsi_aiocb_info = { |
c589b249 RS |
143 | .aiocb_size = sizeof(IscsiAIOCB), |
144 | .cancel = iscsi_aio_cancel, | |
145 | }; | |
146 | ||
147 | ||
148 | static void iscsi_process_read(void *arg); | |
149 | static void iscsi_process_write(void *arg); | |
150 | ||
151 | static int iscsi_process_flush(void *arg) | |
152 | { | |
153 | IscsiLun *iscsilun = arg; | |
154 | ||
155 | return iscsi_queue_length(iscsilun->iscsi) > 0; | |
156 | } | |
157 | ||
158 | static void | |
159 | iscsi_set_events(IscsiLun *iscsilun) | |
160 | { | |
161 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
c9b9f682 RS |
162 | int ev; |
163 | ||
164 | /* We always register a read handler. */ | |
165 | ev = POLLIN; | |
166 | ev |= iscsi_which_events(iscsi); | |
167 | if (ev != iscsilun->events) { | |
168 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), | |
169 | iscsi_process_read, | |
170 | (ev & POLLOUT) ? iscsi_process_write : NULL, | |
171 | iscsi_process_flush, | |
172 | iscsilun); | |
173 | ||
174 | } | |
175 | ||
c9b9f682 | 176 | iscsilun->events = ev; |
c589b249 RS |
177 | } |
178 | ||
179 | static void | |
180 | iscsi_process_read(void *arg) | |
181 | { | |
182 | IscsiLun *iscsilun = arg; | |
183 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
184 | ||
185 | iscsi_service(iscsi, POLLIN); | |
186 | iscsi_set_events(iscsilun); | |
187 | } | |
188 | ||
189 | static void | |
190 | iscsi_process_write(void *arg) | |
191 | { | |
192 | IscsiLun *iscsilun = arg; | |
193 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
194 | ||
195 | iscsi_service(iscsi, POLLOUT); | |
196 | iscsi_set_events(iscsilun); | |
197 | } | |
198 | ||
1dde716e PL |
199 | static int |
200 | iscsi_aio_writev_acb(IscsiAIOCB *acb); | |
c589b249 | 201 | |
c589b249 | 202 | static void |
f4dfa67f | 203 | iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status, |
c589b249 RS |
204 | void *command_data, void *opaque) |
205 | { | |
206 | IscsiAIOCB *acb = opaque; | |
207 | ||
f4dfa67f | 208 | trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled); |
c589b249 RS |
209 | |
210 | g_free(acb->buf); | |
4790b03d | 211 | acb->buf = NULL; |
c589b249 | 212 | |
b2090919 | 213 | if (acb->canceled != 0) { |
c589b249 RS |
214 | return; |
215 | } | |
216 | ||
217 | acb->status = 0; | |
1dde716e PL |
218 | if (status != 0) { |
219 | if (status == SCSI_STATUS_CHECK_CONDITION | |
220 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
221 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
222 | scsi_free_scsi_task(acb->task); |
223 | acb->task = NULL; | |
1dde716e PL |
224 | if (iscsi_aio_writev_acb(acb) == 0) { |
225 | iscsi_set_events(acb->iscsilun); | |
226 | return; | |
227 | } | |
228 | } | |
f4dfa67f | 229 | error_report("Failed to write16 data to iSCSI lun. %s", |
c589b249 RS |
230 | iscsi_get_error(iscsi)); |
231 | acb->status = -EIO; | |
232 | } | |
233 | ||
cfb3f506 | 234 | iscsi_schedule_bh(acb); |
c589b249 RS |
235 | } |
236 | ||
237 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) | |
238 | { | |
239 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
240 | } | |
241 | ||
1dde716e PL |
242 | static int |
243 | iscsi_aio_writev_acb(IscsiAIOCB *acb) | |
c589b249 | 244 | { |
1dde716e | 245 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
c589b249 | 246 | size_t size; |
f4dfa67f RS |
247 | uint32_t num_sectors; |
248 | uint64_t lba; | |
7371d56f | 249 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
f4dfa67f | 250 | struct iscsi_data data; |
7371d56f PL |
251 | #endif |
252 | int ret; | |
c589b249 | 253 | |
c589b249 | 254 | acb->canceled = 0; |
1bd075f2 PB |
255 | acb->bh = NULL; |
256 | acb->status = -EINPROGRESS; | |
4790b03d | 257 | acb->buf = NULL; |
c589b249 | 258 | |
c589b249 | 259 | /* this will allow us to get rid of 'buf' completely */ |
1dde716e | 260 | size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
7371d56f PL |
261 | |
262 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) | |
4cc841b5 PL |
263 | data.size = MIN(size, acb->qiov->size); |
264 | ||
265 | /* if the iovec only contains one buffer we can pass it directly */ | |
266 | if (acb->qiov->niov == 1) { | |
4cc841b5 PL |
267 | data.data = acb->qiov->iov[0].iov_base; |
268 | } else { | |
269 | acb->buf = g_malloc(data.size); | |
270 | qemu_iovec_to_buf(acb->qiov, 0, acb->buf, data.size); | |
271 | data.data = acb->buf; | |
272 | } | |
7371d56f | 273 | #endif |
f4dfa67f RS |
274 | |
275 | acb->task = malloc(sizeof(struct scsi_task)); | |
c589b249 | 276 | if (acb->task == NULL) { |
f4dfa67f RS |
277 | error_report("iSCSI: Failed to allocate task for scsi WRITE16 " |
278 | "command. %s", iscsi_get_error(iscsi)); | |
1dde716e | 279 | return -1; |
f4dfa67f RS |
280 | } |
281 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
282 | ||
283 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
284 | acb->task->cdb_size = 16; | |
285 | acb->task->cdb[0] = 0x8a; | |
1dde716e | 286 | lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
f4dfa67f RS |
287 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
288 | *(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); | |
1dde716e | 289 | num_sectors = size / acb->iscsilun->block_size; |
f4dfa67f RS |
290 | *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors); |
291 | acb->task->expxferlen = size; | |
292 | ||
7371d56f | 293 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
1dde716e | 294 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
295 | iscsi_aio_write16_cb, |
296 | NULL, | |
297 | acb); | |
298 | #else | |
1dde716e | 299 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
300 | iscsi_aio_write16_cb, |
301 | &data, | |
302 | acb); | |
303 | #endif | |
304 | if (ret != 0) { | |
f0d2a4d4 | 305 | scsi_free_scsi_task(acb->task); |
c589b249 | 306 | g_free(acb->buf); |
1dde716e | 307 | return -1; |
c589b249 RS |
308 | } |
309 | ||
7371d56f PL |
310 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
311 | scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov); | |
312 | #endif | |
313 | ||
1dde716e PL |
314 | return 0; |
315 | } | |
316 | ||
317 | static BlockDriverAIOCB * | |
318 | iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
319 | QEMUIOVector *qiov, int nb_sectors, | |
320 | BlockDriverCompletionFunc *cb, | |
321 | void *opaque) | |
322 | { | |
323 | IscsiLun *iscsilun = bs->opaque; | |
324 | IscsiAIOCB *acb; | |
c589b249 | 325 | |
1dde716e PL |
326 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
327 | trace_iscsi_aio_writev(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); | |
328 | ||
329 | acb->iscsilun = iscsilun; | |
330 | acb->qiov = qiov; | |
331 | acb->nb_sectors = nb_sectors; | |
332 | acb->sector_num = sector_num; | |
333 | acb->retries = ISCSI_CMD_RETRIES; | |
334 | ||
335 | if (iscsi_aio_writev_acb(acb) != 0) { | |
1dde716e PL |
336 | qemu_aio_release(acb); |
337 | return NULL; | |
338 | } | |
339 | ||
340 | iscsi_set_events(iscsilun); | |
c589b249 RS |
341 | return &acb->common; |
342 | } | |
343 | ||
1dde716e PL |
344 | static int |
345 | iscsi_aio_readv_acb(IscsiAIOCB *acb); | |
346 | ||
c589b249 | 347 | static void |
f4dfa67f | 348 | iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status, |
c589b249 RS |
349 | void *command_data, void *opaque) |
350 | { | |
351 | IscsiAIOCB *acb = opaque; | |
352 | ||
f4dfa67f | 353 | trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled); |
c589b249 | 354 | |
b2090919 | 355 | if (acb->canceled != 0) { |
c589b249 RS |
356 | return; |
357 | } | |
358 | ||
359 | acb->status = 0; | |
360 | if (status != 0) { | |
1dde716e PL |
361 | if (status == SCSI_STATUS_CHECK_CONDITION |
362 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
363 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
364 | scsi_free_scsi_task(acb->task); |
365 | acb->task = NULL; | |
1dde716e PL |
366 | if (iscsi_aio_readv_acb(acb) == 0) { |
367 | iscsi_set_events(acb->iscsilun); | |
368 | return; | |
369 | } | |
370 | } | |
f4dfa67f | 371 | error_report("Failed to read16 data from iSCSI lun. %s", |
c589b249 RS |
372 | iscsi_get_error(iscsi)); |
373 | acb->status = -EIO; | |
374 | } | |
375 | ||
cfb3f506 | 376 | iscsi_schedule_bh(acb); |
c589b249 RS |
377 | } |
378 | ||
1dde716e PL |
379 | static int |
380 | iscsi_aio_readv_acb(IscsiAIOCB *acb) | |
c589b249 | 381 | { |
1dde716e PL |
382 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
383 | uint64_t lba; | |
384 | uint32_t num_sectors; | |
385 | int ret; | |
7371d56f | 386 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
c589b249 | 387 | int i; |
7371d56f | 388 | #endif |
c589b249 RS |
389 | |
390 | acb->canceled = 0; | |
1bd075f2 PB |
391 | acb->bh = NULL; |
392 | acb->status = -EINPROGRESS; | |
c589b249 RS |
393 | acb->buf = NULL; |
394 | ||
395 | /* If LUN blocksize is bigger than BDRV_BLOCK_SIZE a read from QEMU | |
396 | * may be misaligned to the LUN, so we may need to read some extra | |
397 | * data. | |
398 | */ | |
399 | acb->read_offset = 0; | |
1dde716e PL |
400 | if (acb->iscsilun->block_size > BDRV_SECTOR_SIZE) { |
401 | uint64_t bdrv_offset = BDRV_SECTOR_SIZE * acb->sector_num; | |
c589b249 | 402 | |
1dde716e | 403 | acb->read_offset = bdrv_offset % acb->iscsilun->block_size; |
c589b249 RS |
404 | } |
405 | ||
1dde716e | 406 | num_sectors = (acb->read_size + acb->iscsilun->block_size |
f4dfa67f | 407 | + acb->read_offset - 1) |
1dde716e | 408 | / acb->iscsilun->block_size; |
f4dfa67f RS |
409 | |
410 | acb->task = malloc(sizeof(struct scsi_task)); | |
c589b249 | 411 | if (acb->task == NULL) { |
f4dfa67f RS |
412 | error_report("iSCSI: Failed to allocate task for scsi READ16 " |
413 | "command. %s", iscsi_get_error(iscsi)); | |
1dde716e | 414 | return -1; |
f4dfa67f RS |
415 | } |
416 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
417 | ||
418 | acb->task->xfer_dir = SCSI_XFER_READ; | |
1dde716e PL |
419 | lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
420 | acb->task->expxferlen = acb->read_size; | |
f4dfa67f | 421 | |
1dde716e | 422 | switch (acb->iscsilun->type) { |
f4dfa67f RS |
423 | case TYPE_DISK: |
424 | acb->task->cdb_size = 16; | |
425 | acb->task->cdb[0] = 0x88; | |
426 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); | |
427 | *(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); | |
428 | *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors); | |
429 | break; | |
430 | default: | |
431 | acb->task->cdb_size = 10; | |
432 | acb->task->cdb[0] = 0x28; | |
433 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba); | |
434 | *(uint16_t *)&acb->task->cdb[7] = htons(num_sectors); | |
435 | break; | |
436 | } | |
e829b0bb | 437 | |
1dde716e | 438 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
439 | iscsi_aio_read16_cb, |
440 | NULL, | |
441 | acb); | |
442 | if (ret != 0) { | |
f0d2a4d4 | 443 | scsi_free_scsi_task(acb->task); |
1dde716e | 444 | return -1; |
c589b249 RS |
445 | } |
446 | ||
7371d56f PL |
447 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
448 | scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov); | |
449 | #else | |
c589b249 RS |
450 | for (i = 0; i < acb->qiov->niov; i++) { |
451 | scsi_task_add_data_in_buffer(acb->task, | |
452 | acb->qiov->iov[i].iov_len, | |
453 | acb->qiov->iov[i].iov_base); | |
454 | } | |
7371d56f | 455 | #endif |
1dde716e PL |
456 | return 0; |
457 | } | |
c589b249 | 458 | |
1dde716e PL |
459 | static BlockDriverAIOCB * |
460 | iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
461 | QEMUIOVector *qiov, int nb_sectors, | |
462 | BlockDriverCompletionFunc *cb, | |
463 | void *opaque) | |
464 | { | |
465 | IscsiLun *iscsilun = bs->opaque; | |
466 | IscsiAIOCB *acb; | |
467 | ||
468 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); | |
469 | trace_iscsi_aio_readv(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); | |
470 | ||
471 | acb->nb_sectors = nb_sectors; | |
472 | acb->sector_num = sector_num; | |
473 | acb->iscsilun = iscsilun; | |
474 | acb->qiov = qiov; | |
475 | acb->read_size = BDRV_SECTOR_SIZE * (size_t)acb->nb_sectors; | |
476 | acb->retries = ISCSI_CMD_RETRIES; | |
477 | ||
478 | if (iscsi_aio_readv_acb(acb) != 0) { | |
1dde716e PL |
479 | qemu_aio_release(acb); |
480 | return NULL; | |
481 | } | |
c589b249 | 482 | |
1dde716e | 483 | iscsi_set_events(iscsilun); |
c589b249 RS |
484 | return &acb->common; |
485 | } | |
486 | ||
1dde716e PL |
487 | static int |
488 | iscsi_aio_flush_acb(IscsiAIOCB *acb); | |
c589b249 RS |
489 | |
490 | static void | |
491 | iscsi_synccache10_cb(struct iscsi_context *iscsi, int status, | |
492 | void *command_data, void *opaque) | |
493 | { | |
494 | IscsiAIOCB *acb = opaque; | |
495 | ||
b2090919 | 496 | if (acb->canceled != 0) { |
c589b249 RS |
497 | return; |
498 | } | |
499 | ||
500 | acb->status = 0; | |
1dde716e PL |
501 | if (status != 0) { |
502 | if (status == SCSI_STATUS_CHECK_CONDITION | |
503 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
504 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
505 | scsi_free_scsi_task(acb->task); |
506 | acb->task = NULL; | |
1dde716e PL |
507 | if (iscsi_aio_flush_acb(acb) == 0) { |
508 | iscsi_set_events(acb->iscsilun); | |
509 | return; | |
510 | } | |
511 | } | |
c589b249 RS |
512 | error_report("Failed to sync10 data on iSCSI lun. %s", |
513 | iscsi_get_error(iscsi)); | |
514 | acb->status = -EIO; | |
515 | } | |
516 | ||
cfb3f506 | 517 | iscsi_schedule_bh(acb); |
c589b249 RS |
518 | } |
519 | ||
1dde716e PL |
520 | static int |
521 | iscsi_aio_flush_acb(IscsiAIOCB *acb) | |
c589b249 | 522 | { |
1dde716e | 523 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
c589b249 | 524 | |
c589b249 | 525 | acb->canceled = 0; |
1bd075f2 PB |
526 | acb->bh = NULL; |
527 | acb->status = -EINPROGRESS; | |
4790b03d | 528 | acb->buf = NULL; |
c589b249 | 529 | |
1dde716e | 530 | acb->task = iscsi_synchronizecache10_task(iscsi, acb->iscsilun->lun, |
c589b249 RS |
531 | 0, 0, 0, 0, |
532 | iscsi_synccache10_cb, | |
533 | acb); | |
534 | if (acb->task == NULL) { | |
535 | error_report("iSCSI: Failed to send synchronizecache10 command. %s", | |
536 | iscsi_get_error(iscsi)); | |
1dde716e PL |
537 | return -1; |
538 | } | |
539 | ||
540 | return 0; | |
541 | } | |
542 | ||
543 | static BlockDriverAIOCB * | |
544 | iscsi_aio_flush(BlockDriverState *bs, | |
545 | BlockDriverCompletionFunc *cb, void *opaque) | |
546 | { | |
547 | IscsiLun *iscsilun = bs->opaque; | |
548 | ||
549 | IscsiAIOCB *acb; | |
550 | ||
551 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); | |
552 | ||
553 | acb->iscsilun = iscsilun; | |
554 | acb->retries = ISCSI_CMD_RETRIES; | |
555 | ||
556 | if (iscsi_aio_flush_acb(acb) != 0) { | |
c589b249 RS |
557 | qemu_aio_release(acb); |
558 | return NULL; | |
559 | } | |
560 | ||
561 | iscsi_set_events(iscsilun); | |
562 | ||
563 | return &acb->common; | |
564 | } | |
565 | ||
1dde716e PL |
566 | static int iscsi_aio_discard_acb(IscsiAIOCB *acb); |
567 | ||
fa6acb0c RS |
568 | static void |
569 | iscsi_unmap_cb(struct iscsi_context *iscsi, int status, | |
570 | void *command_data, void *opaque) | |
571 | { | |
572 | IscsiAIOCB *acb = opaque; | |
573 | ||
b2090919 | 574 | if (acb->canceled != 0) { |
fa6acb0c RS |
575 | return; |
576 | } | |
577 | ||
578 | acb->status = 0; | |
1dde716e PL |
579 | if (status != 0) { |
580 | if (status == SCSI_STATUS_CHECK_CONDITION | |
581 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
582 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
583 | scsi_free_scsi_task(acb->task); |
584 | acb->task = NULL; | |
1dde716e PL |
585 | if (iscsi_aio_discard_acb(acb) == 0) { |
586 | iscsi_set_events(acb->iscsilun); | |
587 | return; | |
588 | } | |
589 | } | |
fa6acb0c RS |
590 | error_report("Failed to unmap data on iSCSI lun. %s", |
591 | iscsi_get_error(iscsi)); | |
592 | acb->status = -EIO; | |
593 | } | |
594 | ||
cfb3f506 | 595 | iscsi_schedule_bh(acb); |
fa6acb0c RS |
596 | } |
597 | ||
1dde716e PL |
598 | static int iscsi_aio_discard_acb(IscsiAIOCB *acb) { |
599 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; | |
fa6acb0c RS |
600 | struct unmap_list list[1]; |
601 | ||
fa6acb0c | 602 | acb->canceled = 0; |
1bd075f2 PB |
603 | acb->bh = NULL; |
604 | acb->status = -EINPROGRESS; | |
4790b03d | 605 | acb->buf = NULL; |
fa6acb0c | 606 | |
1dde716e PL |
607 | list[0].lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
608 | list[0].num = acb->nb_sectors * BDRV_SECTOR_SIZE / acb->iscsilun->block_size; | |
fa6acb0c | 609 | |
1dde716e | 610 | acb->task = iscsi_unmap_task(iscsi, acb->iscsilun->lun, |
fa6acb0c RS |
611 | 0, 0, &list[0], 1, |
612 | iscsi_unmap_cb, | |
613 | acb); | |
614 | if (acb->task == NULL) { | |
615 | error_report("iSCSI: Failed to send unmap command. %s", | |
616 | iscsi_get_error(iscsi)); | |
1dde716e PL |
617 | return -1; |
618 | } | |
619 | ||
620 | return 0; | |
621 | } | |
622 | ||
623 | static BlockDriverAIOCB * | |
624 | iscsi_aio_discard(BlockDriverState *bs, | |
625 | int64_t sector_num, int nb_sectors, | |
626 | BlockDriverCompletionFunc *cb, void *opaque) | |
627 | { | |
628 | IscsiLun *iscsilun = bs->opaque; | |
629 | IscsiAIOCB *acb; | |
630 | ||
631 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); | |
632 | ||
633 | acb->iscsilun = iscsilun; | |
634 | acb->nb_sectors = nb_sectors; | |
635 | acb->sector_num = sector_num; | |
636 | acb->retries = ISCSI_CMD_RETRIES; | |
637 | ||
638 | if (iscsi_aio_discard_acb(acb) != 0) { | |
fa6acb0c RS |
639 | qemu_aio_release(acb); |
640 | return NULL; | |
641 | } | |
642 | ||
643 | iscsi_set_events(iscsilun); | |
644 | ||
645 | return &acb->common; | |
646 | } | |
647 | ||
98392453 RS |
648 | #ifdef __linux__ |
649 | static void | |
650 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
651 | void *command_data, void *opaque) | |
652 | { | |
653 | IscsiAIOCB *acb = opaque; | |
654 | ||
0a53f010 RS |
655 | g_free(acb->buf); |
656 | acb->buf = NULL; | |
657 | ||
b2090919 | 658 | if (acb->canceled != 0) { |
98392453 RS |
659 | return; |
660 | } | |
661 | ||
662 | acb->status = 0; | |
663 | if (status < 0) { | |
664 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
665 | iscsi_get_error(iscsi)); | |
666 | acb->status = -EIO; | |
667 | } | |
668 | ||
669 | acb->ioh->driver_status = 0; | |
670 | acb->ioh->host_status = 0; | |
671 | acb->ioh->resid = 0; | |
672 | ||
673 | #define SG_ERR_DRIVER_SENSE 0x08 | |
674 | ||
675 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
676 | int ss; | |
677 | ||
678 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
679 | ||
680 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
681 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
682 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
683 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
684 | } | |
685 | ||
cfb3f506 | 686 | iscsi_schedule_bh(acb); |
98392453 RS |
687 | } |
688 | ||
689 | static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, | |
690 | unsigned long int req, void *buf, | |
691 | BlockDriverCompletionFunc *cb, void *opaque) | |
692 | { | |
693 | IscsiLun *iscsilun = bs->opaque; | |
694 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
695 | struct iscsi_data data; | |
696 | IscsiAIOCB *acb; | |
697 | ||
698 | assert(req == SG_IO); | |
699 | ||
d7331bed | 700 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
701 | |
702 | acb->iscsilun = iscsilun; | |
703 | acb->canceled = 0; | |
1bd075f2 PB |
704 | acb->bh = NULL; |
705 | acb->status = -EINPROGRESS; | |
98392453 RS |
706 | acb->buf = NULL; |
707 | acb->ioh = buf; | |
708 | ||
709 | acb->task = malloc(sizeof(struct scsi_task)); | |
710 | if (acb->task == NULL) { | |
711 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
712 | iscsi_get_error(iscsi)); | |
713 | qemu_aio_release(acb); | |
714 | return NULL; | |
715 | } | |
716 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
717 | ||
718 | switch (acb->ioh->dxfer_direction) { | |
719 | case SG_DXFER_TO_DEV: | |
720 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
721 | break; | |
722 | case SG_DXFER_FROM_DEV: | |
723 | acb->task->xfer_dir = SCSI_XFER_READ; | |
724 | break; | |
725 | default: | |
726 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
727 | break; | |
728 | } | |
729 | ||
730 | acb->task->cdb_size = acb->ioh->cmd_len; | |
731 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
732 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
733 | ||
0a53f010 | 734 | data.size = 0; |
98392453 | 735 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
736 | if (acb->ioh->iovec_count == 0) { |
737 | data.data = acb->ioh->dxferp; | |
738 | data.size = acb->ioh->dxfer_len; | |
739 | } else { | |
740 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
741 | scsi_task_set_iov_out(acb->task, | |
742 | (struct scsi_iovec *) acb->ioh->dxferp, | |
743 | acb->ioh->iovec_count); | |
744 | #else | |
745 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
746 | ||
747 | acb->buf = g_malloc(acb->ioh->dxfer_len); | |
748 | data.data = acb->buf; | |
749 | data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0, | |
750 | acb->buf, acb->ioh->dxfer_len); | |
751 | #endif | |
752 | } | |
98392453 | 753 | } |
0a53f010 | 754 | |
98392453 RS |
755 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
756 | iscsi_aio_ioctl_cb, | |
0a53f010 | 757 | (data.size > 0) ? &data : NULL, |
98392453 RS |
758 | acb) != 0) { |
759 | scsi_free_scsi_task(acb->task); | |
760 | qemu_aio_release(acb); | |
761 | return NULL; | |
762 | } | |
763 | ||
764 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
765 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
766 | if (acb->ioh->iovec_count == 0) { |
767 | scsi_task_add_data_in_buffer(acb->task, | |
768 | acb->ioh->dxfer_len, | |
769 | acb->ioh->dxferp); | |
770 | } else { | |
771 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
772 | scsi_task_set_iov_in(acb->task, | |
773 | (struct scsi_iovec *) acb->ioh->dxferp, | |
774 | acb->ioh->iovec_count); | |
775 | #else | |
776 | int i; | |
777 | for (i = 0; i < acb->ioh->iovec_count; i++) { | |
778 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
779 | ||
780 | scsi_task_add_data_in_buffer(acb->task, | |
781 | iov[i].iov_len, | |
782 | iov[i].iov_base); | |
783 | } | |
784 | #endif | |
785 | } | |
98392453 RS |
786 | } |
787 | ||
788 | iscsi_set_events(iscsilun); | |
789 | ||
790 | return &acb->common; | |
791 | } | |
792 | ||
f1a12821 RS |
793 | |
794 | static void ioctl_cb(void *opaque, int status) | |
795 | { | |
796 | int *p_status = opaque; | |
797 | *p_status = status; | |
798 | } | |
799 | ||
98392453 RS |
800 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
801 | { | |
802 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 803 | int status; |
98392453 RS |
804 | |
805 | switch (req) { | |
806 | case SG_GET_VERSION_NUM: | |
807 | *(int *)buf = 30000; | |
808 | break; | |
809 | case SG_GET_SCSI_ID: | |
810 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
811 | break; | |
f1a12821 RS |
812 | case SG_IO: |
813 | status = -EINPROGRESS; | |
814 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
815 | ||
816 | while (status == -EINPROGRESS) { | |
817 | qemu_aio_wait(); | |
818 | } | |
819 | ||
820 | return 0; | |
98392453 RS |
821 | default: |
822 | return -1; | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | #endif | |
827 | ||
c589b249 RS |
828 | static int64_t |
829 | iscsi_getlength(BlockDriverState *bs) | |
830 | { | |
831 | IscsiLun *iscsilun = bs->opaque; | |
832 | int64_t len; | |
833 | ||
834 | len = iscsilun->num_blocks; | |
835 | len *= iscsilun->block_size; | |
836 | ||
837 | return len; | |
838 | } | |
839 | ||
f9dadc98 RS |
840 | static int parse_chap(struct iscsi_context *iscsi, const char *target) |
841 | { | |
842 | QemuOptsList *list; | |
843 | QemuOpts *opts; | |
844 | const char *user = NULL; | |
845 | const char *password = NULL; | |
846 | ||
847 | list = qemu_find_opts("iscsi"); | |
848 | if (!list) { | |
849 | return 0; | |
850 | } | |
851 | ||
852 | opts = qemu_opts_find(list, target); | |
853 | if (opts == NULL) { | |
854 | opts = QTAILQ_FIRST(&list->head); | |
855 | if (!opts) { | |
856 | return 0; | |
857 | } | |
858 | } | |
859 | ||
860 | user = qemu_opt_get(opts, "user"); | |
861 | if (!user) { | |
862 | return 0; | |
863 | } | |
864 | ||
865 | password = qemu_opt_get(opts, "password"); | |
866 | if (!password) { | |
867 | error_report("CHAP username specified but no password was given"); | |
868 | return -1; | |
869 | } | |
870 | ||
871 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
872 | error_report("Failed to set initiator username and password"); | |
873 | return -1; | |
874 | } | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target) | |
880 | { | |
881 | QemuOptsList *list; | |
882 | QemuOpts *opts; | |
883 | const char *digest = NULL; | |
884 | ||
885 | list = qemu_find_opts("iscsi"); | |
886 | if (!list) { | |
887 | return; | |
888 | } | |
889 | ||
890 | opts = qemu_opts_find(list, target); | |
891 | if (opts == NULL) { | |
892 | opts = QTAILQ_FIRST(&list->head); | |
893 | if (!opts) { | |
894 | return; | |
895 | } | |
896 | } | |
897 | ||
898 | digest = qemu_opt_get(opts, "header-digest"); | |
899 | if (!digest) { | |
900 | return; | |
901 | } | |
902 | ||
903 | if (!strcmp(digest, "CRC32C")) { | |
904 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
905 | } else if (!strcmp(digest, "NONE")) { | |
906 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
907 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
908 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
909 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
910 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
911 | } else { | |
912 | error_report("Invalid header-digest setting : %s", digest); | |
913 | } | |
914 | } | |
915 | ||
916 | static char *parse_initiator_name(const char *target) | |
917 | { | |
918 | QemuOptsList *list; | |
919 | QemuOpts *opts; | |
920 | const char *name = NULL; | |
31459f46 | 921 | const char *iscsi_name = qemu_get_vm_name(); |
f9dadc98 RS |
922 | |
923 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
924 | if (list) { |
925 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 926 | if (!opts) { |
f2ef4a6d PB |
927 | opts = QTAILQ_FIRST(&list->head); |
928 | } | |
929 | if (opts) { | |
930 | name = qemu_opt_get(opts, "initiator-name"); | |
f9dadc98 RS |
931 | } |
932 | } | |
933 | ||
f2ef4a6d PB |
934 | if (name) { |
935 | return g_strdup(name); | |
936 | } else { | |
31459f46 RS |
937 | return g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
938 | iscsi_name ? ":" : "", | |
939 | iscsi_name ? iscsi_name : ""); | |
f9dadc98 | 940 | } |
f9dadc98 RS |
941 | } |
942 | ||
5b5d34ec PL |
943 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
944 | static void iscsi_nop_timed_event(void *opaque) | |
945 | { | |
946 | IscsiLun *iscsilun = opaque; | |
947 | ||
948 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
949 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
950 | iscsi_reconnect(iscsilun->iscsi); | |
951 | } | |
952 | ||
953 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
954 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
955 | return; | |
956 | } | |
957 | ||
958 | qemu_mod_timer(iscsilun->nop_timer, qemu_get_clock_ms(rt_clock) + NOP_INTERVAL); | |
959 | iscsi_set_events(iscsilun); | |
960 | } | |
961 | #endif | |
962 | ||
cb1b83e7 PL |
963 | static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
964 | { | |
965 | struct scsi_task *task = NULL; | |
966 | struct scsi_readcapacity10 *rc10 = NULL; | |
967 | struct scsi_readcapacity16 *rc16 = NULL; | |
968 | int ret = 0; | |
969 | int retries = ISCSI_CMD_RETRIES; | |
970 | ||
1288844e PB |
971 | do { |
972 | if (task != NULL) { | |
973 | scsi_free_scsi_task(task); | |
974 | task = NULL; | |
cb1b83e7 | 975 | } |
1288844e PB |
976 | |
977 | switch (iscsilun->type) { | |
978 | case TYPE_DISK: | |
979 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
980 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
981 | rc16 = scsi_datain_unmarshall(task); | |
982 | if (rc16 == NULL) { | |
983 | error_report("iSCSI: Failed to unmarshall readcapacity16 data."); | |
984 | ret = -EINVAL; | |
985 | } else { | |
986 | iscsilun->block_size = rc16->block_length; | |
987 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
988 | } | |
989 | } | |
990 | break; | |
991 | case TYPE_ROM: | |
992 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
993 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
994 | rc10 = scsi_datain_unmarshall(task); | |
995 | if (rc10 == NULL) { | |
996 | error_report("iSCSI: Failed to unmarshall readcapacity10 data."); | |
997 | ret = -EINVAL; | |
998 | } else { | |
999 | iscsilun->block_size = rc10->block_size; | |
1000 | if (rc10->lba == 0) { | |
1001 | /* blank disk loaded */ | |
1002 | iscsilun->num_blocks = 0; | |
1003 | } else { | |
1004 | iscsilun->num_blocks = rc10->lba + 1; | |
1005 | } | |
1006 | } | |
1007 | } | |
1008 | break; | |
1009 | default: | |
1010 | return 0; | |
cb1b83e7 | 1011 | } |
1288844e PB |
1012 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1013 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1014 | && retries-- > 0); | |
cb1b83e7 | 1015 | |
1288844e PB |
1016 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1017 | error_report("iSCSI: failed to send readcapacity10 command."); | |
1018 | ret = -EINVAL; | |
1019 | } | |
cb1b83e7 PL |
1020 | if (task) { |
1021 | scsi_free_scsi_task(task); | |
1022 | } | |
cb1b83e7 PL |
1023 | return ret; |
1024 | } | |
1025 | ||
60beb341 KW |
1026 | /* TODO Convert to fine grained options */ |
1027 | static QemuOptsList runtime_opts = { | |
1028 | .name = "iscsi", | |
1029 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1030 | .desc = { | |
1031 | { | |
1032 | .name = "filename", | |
1033 | .type = QEMU_OPT_STRING, | |
1034 | .help = "URL to the iscsi image", | |
1035 | }, | |
1036 | { /* end of list */ } | |
1037 | }, | |
1038 | }; | |
1039 | ||
c589b249 RS |
1040 | /* |
1041 | * We support iscsi url's on the form | |
1042 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1043 | */ | |
56d1b4d2 | 1044 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags) |
c589b249 RS |
1045 | { |
1046 | IscsiLun *iscsilun = bs->opaque; | |
1047 | struct iscsi_context *iscsi = NULL; | |
1048 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1049 | struct scsi_task *task = NULL; |
1050 | struct scsi_inquiry_standard *inq = NULL; | |
f9dadc98 | 1051 | char *initiator_name = NULL; |
60beb341 KW |
1052 | QemuOpts *opts; |
1053 | Error *local_err = NULL; | |
1054 | const char *filename; | |
c589b249 RS |
1055 | int ret; |
1056 | ||
1057 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
1058 | error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. " | |
1059 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
1060 | "of 512", BDRV_SECTOR_SIZE); | |
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
60beb341 KW |
1064 | opts = qemu_opts_create_nofail(&runtime_opts); |
1065 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
1066 | if (error_is_set(&local_err)) { | |
1067 | qerror_report_err(local_err); | |
1068 | error_free(local_err); | |
1069 | ret = -EINVAL; | |
1070 | goto out; | |
1071 | } | |
1072 | ||
1073 | filename = qemu_opt_get(opts, "filename"); | |
1074 | ||
1075 | ||
c589b249 RS |
1076 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1077 | if (iscsi_url == NULL) { | |
8da1e18b | 1078 | error_report("Failed to parse URL : %s", filename); |
c589b249 | 1079 | ret = -EINVAL; |
b93c94f7 | 1080 | goto out; |
c589b249 RS |
1081 | } |
1082 | ||
f9dadc98 RS |
1083 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1084 | ||
1085 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1086 | ||
1087 | iscsi = iscsi_create_context(initiator_name); | |
1088 | if (iscsi == NULL) { | |
1089 | error_report("iSCSI: Failed to create iSCSI context."); | |
1090 | ret = -ENOMEM; | |
b93c94f7 | 1091 | goto out; |
f9dadc98 RS |
1092 | } |
1093 | ||
c589b249 RS |
1094 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
1095 | error_report("iSCSI: Failed to set target name."); | |
1096 | ret = -EINVAL; | |
b93c94f7 | 1097 | goto out; |
c589b249 RS |
1098 | } |
1099 | ||
1100 | if (iscsi_url->user != NULL) { | |
1101 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
1102 | iscsi_url->passwd); | |
1103 | if (ret != 0) { | |
1104 | error_report("Failed to set initiator username and password"); | |
1105 | ret = -EINVAL; | |
b93c94f7 | 1106 | goto out; |
c589b249 RS |
1107 | } |
1108 | } | |
f9dadc98 RS |
1109 | |
1110 | /* check if we got CHAP username/password via the options */ | |
1111 | if (parse_chap(iscsi, iscsi_url->target) != 0) { | |
1112 | error_report("iSCSI: Failed to set CHAP user/password"); | |
1113 | ret = -EINVAL; | |
b93c94f7 | 1114 | goto out; |
f9dadc98 RS |
1115 | } |
1116 | ||
c589b249 RS |
1117 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1118 | error_report("iSCSI: Failed to set session type to normal."); | |
1119 | ret = -EINVAL; | |
b93c94f7 | 1120 | goto out; |
c589b249 RS |
1121 | } |
1122 | ||
1123 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1124 | ||
f9dadc98 RS |
1125 | /* check if we got HEADER_DIGEST via the options */ |
1126 | parse_header_digest(iscsi, iscsi_url->target); | |
1127 | ||
e829b0bb PL |
1128 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1129 | error_report("iSCSI: Failed to connect to LUN : %s", | |
1130 | iscsi_get_error(iscsi)); | |
1131 | ret = -EINVAL; | |
1132 | goto out; | |
1133 | } | |
c589b249 RS |
1134 | |
1135 | iscsilun->iscsi = iscsi; | |
1136 | iscsilun->lun = iscsi_url->lun; | |
1137 | ||
e829b0bb PL |
1138 | task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1139 | ||
1140 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1141 | error_report("iSCSI: failed to send inquiry command."); | |
c589b249 | 1142 | ret = -EINVAL; |
b93c94f7 | 1143 | goto out; |
c589b249 RS |
1144 | } |
1145 | ||
e829b0bb PL |
1146 | inq = scsi_datain_unmarshall(task); |
1147 | if (inq == NULL) { | |
1148 | error_report("iSCSI: Failed to unmarshall inquiry data."); | |
c589b249 | 1149 | ret = -EINVAL; |
b93c94f7 | 1150 | goto out; |
c589b249 | 1151 | } |
622695a4 | 1152 | |
e829b0bb PL |
1153 | iscsilun->type = inq->periperal_device_type; |
1154 | ||
cb1b83e7 PL |
1155 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1156 | goto out; | |
e829b0bb | 1157 | } |
e829b0bb PL |
1158 | bs->total_sectors = iscsilun->num_blocks * |
1159 | iscsilun->block_size / BDRV_SECTOR_SIZE ; | |
1160 | ||
622695a4 RS |
1161 | /* Medium changer or tape. We dont have any emulation for this so this must |
1162 | * be sg ioctl compatible. We force it to be sg, otherwise qemu will try | |
1163 | * to read from the device to guess the image format. | |
1164 | */ | |
1165 | if (iscsilun->type == TYPE_MEDIUM_CHANGER || | |
1166 | iscsilun->type == TYPE_TAPE) { | |
1167 | bs->sg = 1; | |
1168 | } | |
1169 | ||
5b5d34ec PL |
1170 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
1171 | /* Set up a timer for sending out iSCSI NOPs */ | |
1172 | iscsilun->nop_timer = qemu_new_timer_ms(rt_clock, iscsi_nop_timed_event, iscsilun); | |
1173 | qemu_mod_timer(iscsilun->nop_timer, qemu_get_clock_ms(rt_clock) + NOP_INTERVAL); | |
1174 | #endif | |
1175 | ||
b93c94f7 | 1176 | out: |
60beb341 | 1177 | qemu_opts_del(opts); |
f9dadc98 RS |
1178 | if (initiator_name != NULL) { |
1179 | g_free(initiator_name); | |
1180 | } | |
c589b249 RS |
1181 | if (iscsi_url != NULL) { |
1182 | iscsi_destroy_url(iscsi_url); | |
1183 | } | |
e829b0bb PL |
1184 | if (task != NULL) { |
1185 | scsi_free_scsi_task(task); | |
1186 | } | |
b93c94f7 PB |
1187 | |
1188 | if (ret) { | |
1189 | if (iscsi != NULL) { | |
1190 | iscsi_destroy_context(iscsi); | |
1191 | } | |
1192 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1193 | } |
c589b249 RS |
1194 | return ret; |
1195 | } | |
1196 | ||
1197 | static void iscsi_close(BlockDriverState *bs) | |
1198 | { | |
1199 | IscsiLun *iscsilun = bs->opaque; | |
1200 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1201 | ||
5b5d34ec PL |
1202 | if (iscsilun->nop_timer) { |
1203 | qemu_del_timer(iscsilun->nop_timer); | |
1204 | qemu_free_timer(iscsilun->nop_timer); | |
1205 | } | |
bafbd6a1 | 1206 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL, NULL); |
c589b249 RS |
1207 | iscsi_destroy_context(iscsi); |
1208 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
1209 | } | |
1210 | ||
cb1b83e7 PL |
1211 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1212 | { | |
1213 | IscsiLun *iscsilun = bs->opaque; | |
1214 | int ret = 0; | |
1215 | ||
1216 | if (iscsilun->type != TYPE_DISK) { | |
1217 | return -ENOTSUP; | |
1218 | } | |
1219 | ||
1220 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { | |
1221 | return ret; | |
1222 | } | |
1223 | ||
1224 | if (offset > iscsi_getlength(bs)) { | |
1225 | return -EINVAL; | |
1226 | } | |
1227 | ||
1228 | return 0; | |
1229 | } | |
1230 | ||
f807ecd5 PL |
1231 | static int iscsi_has_zero_init(BlockDriverState *bs) |
1232 | { | |
1233 | return 0; | |
1234 | } | |
1235 | ||
de8864e5 PL |
1236 | static int iscsi_create(const char *filename, QEMUOptionParameter *options) |
1237 | { | |
1238 | int ret = 0; | |
1239 | int64_t total_size = 0; | |
1240 | BlockDriverState bs; | |
1241 | IscsiLun *iscsilun = NULL; | |
60beb341 | 1242 | QDict *bs_options; |
de8864e5 PL |
1243 | |
1244 | memset(&bs, 0, sizeof(BlockDriverState)); | |
1245 | ||
1246 | /* Read out options */ | |
1247 | while (options && options->name) { | |
1248 | if (!strcmp(options->name, "size")) { | |
1249 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
1250 | } | |
1251 | options++; | |
1252 | } | |
1253 | ||
1254 | bs.opaque = g_malloc0(sizeof(struct IscsiLun)); | |
1255 | iscsilun = bs.opaque; | |
1256 | ||
60beb341 KW |
1257 | bs_options = qdict_new(); |
1258 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
56d1b4d2 | 1259 | ret = iscsi_open(&bs, bs_options, 0); |
60beb341 KW |
1260 | QDECREF(bs_options); |
1261 | ||
de8864e5 PL |
1262 | if (ret != 0) { |
1263 | goto out; | |
1264 | } | |
5b5d34ec PL |
1265 | if (iscsilun->nop_timer) { |
1266 | qemu_del_timer(iscsilun->nop_timer); | |
1267 | qemu_free_timer(iscsilun->nop_timer); | |
1268 | } | |
de8864e5 PL |
1269 | if (iscsilun->type != TYPE_DISK) { |
1270 | ret = -ENODEV; | |
1271 | goto out; | |
1272 | } | |
1273 | if (bs.total_sectors < total_size) { | |
1274 | ret = -ENOSPC; | |
d3bda7bc | 1275 | goto out; |
de8864e5 PL |
1276 | } |
1277 | ||
1278 | ret = 0; | |
1279 | out: | |
1280 | if (iscsilun->iscsi != NULL) { | |
1281 | iscsi_destroy_context(iscsilun->iscsi); | |
1282 | } | |
1283 | g_free(bs.opaque); | |
1284 | return ret; | |
1285 | } | |
1286 | ||
1287 | static QEMUOptionParameter iscsi_create_options[] = { | |
1288 | { | |
1289 | .name = BLOCK_OPT_SIZE, | |
1290 | .type = OPT_SIZE, | |
1291 | .help = "Virtual disk size" | |
1292 | }, | |
1293 | { NULL } | |
1294 | }; | |
1295 | ||
c589b249 RS |
1296 | static BlockDriver bdrv_iscsi = { |
1297 | .format_name = "iscsi", | |
1298 | .protocol_name = "iscsi", | |
1299 | ||
1300 | .instance_size = sizeof(IscsiLun), | |
1301 | .bdrv_file_open = iscsi_open, | |
1302 | .bdrv_close = iscsi_close, | |
de8864e5 PL |
1303 | .bdrv_create = iscsi_create, |
1304 | .create_options = iscsi_create_options, | |
c589b249 RS |
1305 | |
1306 | .bdrv_getlength = iscsi_getlength, | |
cb1b83e7 | 1307 | .bdrv_truncate = iscsi_truncate, |
c589b249 RS |
1308 | |
1309 | .bdrv_aio_readv = iscsi_aio_readv, | |
1310 | .bdrv_aio_writev = iscsi_aio_writev, | |
1311 | .bdrv_aio_flush = iscsi_aio_flush, | |
fa6acb0c RS |
1312 | |
1313 | .bdrv_aio_discard = iscsi_aio_discard, | |
f807ecd5 | 1314 | .bdrv_has_zero_init = iscsi_has_zero_init, |
98392453 RS |
1315 | |
1316 | #ifdef __linux__ | |
1317 | .bdrv_ioctl = iscsi_ioctl, | |
1318 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1319 | #endif | |
c589b249 RS |
1320 | }; |
1321 | ||
4d454574 PB |
1322 | static QemuOptsList qemu_iscsi_opts = { |
1323 | .name = "iscsi", | |
1324 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1325 | .desc = { | |
1326 | { | |
1327 | .name = "user", | |
1328 | .type = QEMU_OPT_STRING, | |
1329 | .help = "username for CHAP authentication to target", | |
1330 | },{ | |
1331 | .name = "password", | |
1332 | .type = QEMU_OPT_STRING, | |
1333 | .help = "password for CHAP authentication to target", | |
1334 | },{ | |
1335 | .name = "header-digest", | |
1336 | .type = QEMU_OPT_STRING, | |
1337 | .help = "HeaderDigest setting. " | |
1338 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1339 | },{ | |
1340 | .name = "initiator-name", | |
1341 | .type = QEMU_OPT_STRING, | |
1342 | .help = "Initiator iqn name to use when connecting", | |
1343 | }, | |
1344 | { /* end of list */ } | |
1345 | }, | |
1346 | }; | |
1347 | ||
c589b249 RS |
1348 | static void iscsi_block_init(void) |
1349 | { | |
1350 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1351 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1352 | } |
1353 | ||
1354 | block_init(iscsi_block_init); |