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