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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" |
5accc840 PB |
36 | #include "sysemu/sysemu.h" |
37 | #include "qmp-commands.h" | |
c589b249 RS |
38 | |
39 | #include <iscsi/iscsi.h> | |
40 | #include <iscsi/scsi-lowlevel.h> | |
41 | ||
98392453 RS |
42 | #ifdef __linux__ |
43 | #include <scsi/sg.h> | |
0d09e41a | 44 | #include <block/scsi.h> |
98392453 | 45 | #endif |
c589b249 RS |
46 | |
47 | typedef struct IscsiLun { | |
48 | struct iscsi_context *iscsi; | |
49 | int lun; | |
dbfff6d7 | 50 | enum scsi_inquiry_peripheral_device_type type; |
c589b249 | 51 | int block_size; |
c7b4a952 | 52 | uint64_t num_blocks; |
c9b9f682 | 53 | int events; |
5b5d34ec | 54 | QEMUTimer *nop_timer; |
c589b249 RS |
55 | } IscsiLun; |
56 | ||
57 | typedef struct IscsiAIOCB { | |
58 | BlockDriverAIOCB common; | |
59 | QEMUIOVector *qiov; | |
60 | QEMUBH *bh; | |
61 | IscsiLun *iscsilun; | |
62 | struct scsi_task *task; | |
63 | uint8_t *buf; | |
64 | int status; | |
65 | int canceled; | |
1dde716e | 66 | int retries; |
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 | ||
c589b249 RS |
151 | static void |
152 | iscsi_set_events(IscsiLun *iscsilun) | |
153 | { | |
154 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
c9b9f682 RS |
155 | int ev; |
156 | ||
157 | /* We always register a read handler. */ | |
158 | ev = POLLIN; | |
159 | ev |= iscsi_which_events(iscsi); | |
160 | if (ev != iscsilun->events) { | |
161 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), | |
162 | iscsi_process_read, | |
163 | (ev & POLLOUT) ? iscsi_process_write : NULL, | |
c9b9f682 RS |
164 | iscsilun); |
165 | ||
166 | } | |
167 | ||
c9b9f682 | 168 | iscsilun->events = ev; |
c589b249 RS |
169 | } |
170 | ||
171 | static void | |
172 | iscsi_process_read(void *arg) | |
173 | { | |
174 | IscsiLun *iscsilun = arg; | |
175 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
176 | ||
177 | iscsi_service(iscsi, POLLIN); | |
178 | iscsi_set_events(iscsilun); | |
179 | } | |
180 | ||
181 | static void | |
182 | iscsi_process_write(void *arg) | |
183 | { | |
184 | IscsiLun *iscsilun = arg; | |
185 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
186 | ||
187 | iscsi_service(iscsi, POLLOUT); | |
188 | iscsi_set_events(iscsilun); | |
189 | } | |
190 | ||
1dde716e PL |
191 | static int |
192 | iscsi_aio_writev_acb(IscsiAIOCB *acb); | |
c589b249 | 193 | |
c589b249 | 194 | static void |
f4dfa67f | 195 | iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status, |
c589b249 RS |
196 | void *command_data, void *opaque) |
197 | { | |
198 | IscsiAIOCB *acb = opaque; | |
199 | ||
f4dfa67f | 200 | trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled); |
c589b249 RS |
201 | |
202 | g_free(acb->buf); | |
4790b03d | 203 | acb->buf = NULL; |
c589b249 | 204 | |
b2090919 | 205 | if (acb->canceled != 0) { |
c589b249 RS |
206 | return; |
207 | } | |
208 | ||
209 | acb->status = 0; | |
1dde716e PL |
210 | if (status != 0) { |
211 | if (status == SCSI_STATUS_CHECK_CONDITION | |
212 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
213 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
214 | scsi_free_scsi_task(acb->task); |
215 | acb->task = NULL; | |
1dde716e PL |
216 | if (iscsi_aio_writev_acb(acb) == 0) { |
217 | iscsi_set_events(acb->iscsilun); | |
218 | return; | |
219 | } | |
220 | } | |
f4dfa67f | 221 | error_report("Failed to write16 data to iSCSI lun. %s", |
c589b249 RS |
222 | iscsi_get_error(iscsi)); |
223 | acb->status = -EIO; | |
224 | } | |
225 | ||
cfb3f506 | 226 | iscsi_schedule_bh(acb); |
c589b249 RS |
227 | } |
228 | ||
0777b5dd PL |
229 | static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun) |
230 | { | |
231 | return sector * iscsilun->block_size / BDRV_SECTOR_SIZE; | |
232 | } | |
233 | ||
c589b249 RS |
234 | static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun) |
235 | { | |
236 | return sector * BDRV_SECTOR_SIZE / iscsilun->block_size; | |
237 | } | |
238 | ||
91bea4e2 PL |
239 | static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
240 | IscsiLun *iscsilun) | |
241 | { | |
242 | if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size || | |
243 | (nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { | |
f5075224 RJ |
244 | error_report("iSCSI misaligned request: " |
245 | "iscsilun->block_size %u, sector_num %" PRIi64 | |
246 | ", nb_sectors %d", | |
91bea4e2 PL |
247 | iscsilun->block_size, sector_num, nb_sectors); |
248 | return 0; | |
249 | } | |
250 | return 1; | |
251 | } | |
252 | ||
1dde716e PL |
253 | static int |
254 | iscsi_aio_writev_acb(IscsiAIOCB *acb) | |
c589b249 | 255 | { |
1dde716e | 256 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
c589b249 | 257 | size_t size; |
f4dfa67f RS |
258 | uint32_t num_sectors; |
259 | uint64_t lba; | |
7371d56f | 260 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
f4dfa67f | 261 | struct iscsi_data data; |
7371d56f PL |
262 | #endif |
263 | int ret; | |
c589b249 | 264 | |
c589b249 | 265 | acb->canceled = 0; |
1bd075f2 PB |
266 | acb->bh = NULL; |
267 | acb->status = -EINPROGRESS; | |
4790b03d | 268 | acb->buf = NULL; |
c589b249 | 269 | |
c589b249 | 270 | /* this will allow us to get rid of 'buf' completely */ |
1dde716e | 271 | size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
7371d56f PL |
272 | |
273 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) | |
4cc841b5 PL |
274 | data.size = MIN(size, acb->qiov->size); |
275 | ||
276 | /* if the iovec only contains one buffer we can pass it directly */ | |
277 | if (acb->qiov->niov == 1) { | |
4cc841b5 PL |
278 | data.data = acb->qiov->iov[0].iov_base; |
279 | } else { | |
280 | acb->buf = g_malloc(data.size); | |
281 | qemu_iovec_to_buf(acb->qiov, 0, acb->buf, data.size); | |
282 | data.data = acb->buf; | |
283 | } | |
7371d56f | 284 | #endif |
f4dfa67f RS |
285 | |
286 | acb->task = malloc(sizeof(struct scsi_task)); | |
c589b249 | 287 | if (acb->task == NULL) { |
f4dfa67f RS |
288 | error_report("iSCSI: Failed to allocate task for scsi WRITE16 " |
289 | "command. %s", iscsi_get_error(iscsi)); | |
1dde716e | 290 | return -1; |
f4dfa67f RS |
291 | } |
292 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
293 | ||
294 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
295 | acb->task->cdb_size = 16; | |
296 | acb->task->cdb[0] = 0x8a; | |
1dde716e | 297 | lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
f4dfa67f RS |
298 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
299 | *(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); | |
0777b5dd | 300 | num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
f4dfa67f RS |
301 | *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors); |
302 | acb->task->expxferlen = size; | |
303 | ||
7371d56f | 304 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
1dde716e | 305 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
306 | iscsi_aio_write16_cb, |
307 | NULL, | |
308 | acb); | |
309 | #else | |
1dde716e | 310 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
311 | iscsi_aio_write16_cb, |
312 | &data, | |
313 | acb); | |
314 | #endif | |
315 | if (ret != 0) { | |
f0d2a4d4 | 316 | scsi_free_scsi_task(acb->task); |
c589b249 | 317 | g_free(acb->buf); |
1dde716e | 318 | return -1; |
c589b249 RS |
319 | } |
320 | ||
7371d56f PL |
321 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
322 | scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov); | |
323 | #endif | |
324 | ||
1dde716e PL |
325 | return 0; |
326 | } | |
327 | ||
328 | static BlockDriverAIOCB * | |
329 | iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num, | |
330 | QEMUIOVector *qiov, int nb_sectors, | |
331 | BlockDriverCompletionFunc *cb, | |
332 | void *opaque) | |
333 | { | |
334 | IscsiLun *iscsilun = bs->opaque; | |
335 | IscsiAIOCB *acb; | |
c589b249 | 336 | |
91bea4e2 PL |
337 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
338 | return NULL; | |
339 | } | |
340 | ||
1dde716e PL |
341 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
342 | trace_iscsi_aio_writev(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); | |
343 | ||
344 | acb->iscsilun = iscsilun; | |
345 | acb->qiov = qiov; | |
346 | acb->nb_sectors = nb_sectors; | |
347 | acb->sector_num = sector_num; | |
348 | acb->retries = ISCSI_CMD_RETRIES; | |
349 | ||
350 | if (iscsi_aio_writev_acb(acb) != 0) { | |
1dde716e PL |
351 | qemu_aio_release(acb); |
352 | return NULL; | |
353 | } | |
354 | ||
355 | iscsi_set_events(iscsilun); | |
c589b249 RS |
356 | return &acb->common; |
357 | } | |
358 | ||
1dde716e PL |
359 | static int |
360 | iscsi_aio_readv_acb(IscsiAIOCB *acb); | |
361 | ||
c589b249 | 362 | static void |
f4dfa67f | 363 | iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status, |
c589b249 RS |
364 | void *command_data, void *opaque) |
365 | { | |
366 | IscsiAIOCB *acb = opaque; | |
367 | ||
f4dfa67f | 368 | trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled); |
c589b249 | 369 | |
b2090919 | 370 | if (acb->canceled != 0) { |
c589b249 RS |
371 | return; |
372 | } | |
373 | ||
374 | acb->status = 0; | |
375 | if (status != 0) { | |
1dde716e PL |
376 | if (status == SCSI_STATUS_CHECK_CONDITION |
377 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
378 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
379 | scsi_free_scsi_task(acb->task); |
380 | acb->task = NULL; | |
1dde716e PL |
381 | if (iscsi_aio_readv_acb(acb) == 0) { |
382 | iscsi_set_events(acb->iscsilun); | |
383 | return; | |
384 | } | |
385 | } | |
f4dfa67f | 386 | error_report("Failed to read16 data from iSCSI lun. %s", |
c589b249 RS |
387 | iscsi_get_error(iscsi)); |
388 | acb->status = -EIO; | |
389 | } | |
390 | ||
cfb3f506 | 391 | iscsi_schedule_bh(acb); |
c589b249 RS |
392 | } |
393 | ||
1dde716e PL |
394 | static int |
395 | iscsi_aio_readv_acb(IscsiAIOCB *acb) | |
c589b249 | 396 | { |
1dde716e | 397 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
7e4d5a9f | 398 | size_t size; |
1dde716e PL |
399 | uint64_t lba; |
400 | uint32_t num_sectors; | |
401 | int ret; | |
7371d56f | 402 | #if !defined(LIBISCSI_FEATURE_IOVECTOR) |
c589b249 | 403 | int i; |
7371d56f | 404 | #endif |
c589b249 RS |
405 | |
406 | acb->canceled = 0; | |
1bd075f2 PB |
407 | acb->bh = NULL; |
408 | acb->status = -EINPROGRESS; | |
c589b249 RS |
409 | acb->buf = NULL; |
410 | ||
7e4d5a9f | 411 | size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
f4dfa67f RS |
412 | |
413 | acb->task = malloc(sizeof(struct scsi_task)); | |
c589b249 | 414 | if (acb->task == NULL) { |
f4dfa67f RS |
415 | error_report("iSCSI: Failed to allocate task for scsi READ16 " |
416 | "command. %s", iscsi_get_error(iscsi)); | |
1dde716e | 417 | return -1; |
f4dfa67f RS |
418 | } |
419 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
420 | ||
421 | acb->task->xfer_dir = SCSI_XFER_READ; | |
7e4d5a9f | 422 | acb->task->expxferlen = size; |
1dde716e | 423 | lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
7e4d5a9f | 424 | num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
f4dfa67f | 425 | |
1dde716e | 426 | switch (acb->iscsilun->type) { |
f4dfa67f RS |
427 | case TYPE_DISK: |
428 | acb->task->cdb_size = 16; | |
429 | acb->task->cdb[0] = 0x88; | |
430 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); | |
431 | *(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); | |
432 | *(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors); | |
433 | break; | |
434 | default: | |
435 | acb->task->cdb_size = 10; | |
436 | acb->task->cdb[0] = 0x28; | |
437 | *(uint32_t *)&acb->task->cdb[2] = htonl(lba); | |
438 | *(uint16_t *)&acb->task->cdb[7] = htons(num_sectors); | |
439 | break; | |
440 | } | |
e829b0bb | 441 | |
1dde716e | 442 | ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
7371d56f PL |
443 | iscsi_aio_read16_cb, |
444 | NULL, | |
445 | acb); | |
446 | if (ret != 0) { | |
f0d2a4d4 | 447 | scsi_free_scsi_task(acb->task); |
1dde716e | 448 | return -1; |
c589b249 RS |
449 | } |
450 | ||
7371d56f PL |
451 | #if defined(LIBISCSI_FEATURE_IOVECTOR) |
452 | scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov); | |
453 | #else | |
c589b249 RS |
454 | for (i = 0; i < acb->qiov->niov; i++) { |
455 | scsi_task_add_data_in_buffer(acb->task, | |
456 | acb->qiov->iov[i].iov_len, | |
457 | acb->qiov->iov[i].iov_base); | |
458 | } | |
7371d56f | 459 | #endif |
1dde716e PL |
460 | return 0; |
461 | } | |
c589b249 | 462 | |
1dde716e PL |
463 | static BlockDriverAIOCB * |
464 | iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, | |
465 | QEMUIOVector *qiov, int nb_sectors, | |
466 | BlockDriverCompletionFunc *cb, | |
467 | void *opaque) | |
468 | { | |
469 | IscsiLun *iscsilun = bs->opaque; | |
470 | IscsiAIOCB *acb; | |
471 | ||
91bea4e2 PL |
472 | if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { |
473 | return NULL; | |
474 | } | |
475 | ||
1dde716e PL |
476 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
477 | trace_iscsi_aio_readv(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); | |
478 | ||
479 | acb->nb_sectors = nb_sectors; | |
480 | acb->sector_num = sector_num; | |
481 | acb->iscsilun = iscsilun; | |
482 | acb->qiov = qiov; | |
1dde716e PL |
483 | acb->retries = ISCSI_CMD_RETRIES; |
484 | ||
485 | if (iscsi_aio_readv_acb(acb) != 0) { | |
1dde716e PL |
486 | qemu_aio_release(acb); |
487 | return NULL; | |
488 | } | |
c589b249 | 489 | |
1dde716e | 490 | iscsi_set_events(iscsilun); |
c589b249 RS |
491 | return &acb->common; |
492 | } | |
493 | ||
1dde716e PL |
494 | static int |
495 | iscsi_aio_flush_acb(IscsiAIOCB *acb); | |
c589b249 RS |
496 | |
497 | static void | |
498 | iscsi_synccache10_cb(struct iscsi_context *iscsi, int status, | |
499 | void *command_data, void *opaque) | |
500 | { | |
501 | IscsiAIOCB *acb = opaque; | |
502 | ||
b2090919 | 503 | if (acb->canceled != 0) { |
c589b249 RS |
504 | return; |
505 | } | |
506 | ||
507 | acb->status = 0; | |
1dde716e PL |
508 | if (status != 0) { |
509 | if (status == SCSI_STATUS_CHECK_CONDITION | |
510 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
511 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
512 | scsi_free_scsi_task(acb->task); |
513 | acb->task = NULL; | |
1dde716e PL |
514 | if (iscsi_aio_flush_acb(acb) == 0) { |
515 | iscsi_set_events(acb->iscsilun); | |
516 | return; | |
517 | } | |
518 | } | |
c589b249 RS |
519 | error_report("Failed to sync10 data on iSCSI lun. %s", |
520 | iscsi_get_error(iscsi)); | |
521 | acb->status = -EIO; | |
522 | } | |
523 | ||
cfb3f506 | 524 | iscsi_schedule_bh(acb); |
c589b249 RS |
525 | } |
526 | ||
1dde716e PL |
527 | static int |
528 | iscsi_aio_flush_acb(IscsiAIOCB *acb) | |
c589b249 | 529 | { |
1dde716e | 530 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; |
c589b249 | 531 | |
c589b249 | 532 | acb->canceled = 0; |
1bd075f2 PB |
533 | acb->bh = NULL; |
534 | acb->status = -EINPROGRESS; | |
4790b03d | 535 | acb->buf = NULL; |
c589b249 | 536 | |
1dde716e | 537 | acb->task = iscsi_synchronizecache10_task(iscsi, acb->iscsilun->lun, |
c589b249 RS |
538 | 0, 0, 0, 0, |
539 | iscsi_synccache10_cb, | |
540 | acb); | |
541 | if (acb->task == NULL) { | |
542 | error_report("iSCSI: Failed to send synchronizecache10 command. %s", | |
543 | iscsi_get_error(iscsi)); | |
1dde716e PL |
544 | return -1; |
545 | } | |
546 | ||
547 | return 0; | |
548 | } | |
549 | ||
550 | static BlockDriverAIOCB * | |
551 | iscsi_aio_flush(BlockDriverState *bs, | |
552 | BlockDriverCompletionFunc *cb, void *opaque) | |
553 | { | |
554 | IscsiLun *iscsilun = bs->opaque; | |
555 | ||
556 | IscsiAIOCB *acb; | |
557 | ||
558 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); | |
559 | ||
560 | acb->iscsilun = iscsilun; | |
561 | acb->retries = ISCSI_CMD_RETRIES; | |
562 | ||
563 | if (iscsi_aio_flush_acb(acb) != 0) { | |
c589b249 RS |
564 | qemu_aio_release(acb); |
565 | return NULL; | |
566 | } | |
567 | ||
568 | iscsi_set_events(iscsilun); | |
569 | ||
570 | return &acb->common; | |
571 | } | |
572 | ||
1dde716e PL |
573 | static int iscsi_aio_discard_acb(IscsiAIOCB *acb); |
574 | ||
fa6acb0c RS |
575 | static void |
576 | iscsi_unmap_cb(struct iscsi_context *iscsi, int status, | |
577 | void *command_data, void *opaque) | |
578 | { | |
579 | IscsiAIOCB *acb = opaque; | |
580 | ||
b2090919 | 581 | if (acb->canceled != 0) { |
fa6acb0c RS |
582 | return; |
583 | } | |
584 | ||
585 | acb->status = 0; | |
1dde716e PL |
586 | if (status != 0) { |
587 | if (status == SCSI_STATUS_CHECK_CONDITION | |
588 | && acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
589 | && acb->retries-- > 0) { | |
f0d2a4d4 PB |
590 | scsi_free_scsi_task(acb->task); |
591 | acb->task = NULL; | |
1dde716e PL |
592 | if (iscsi_aio_discard_acb(acb) == 0) { |
593 | iscsi_set_events(acb->iscsilun); | |
594 | return; | |
595 | } | |
596 | } | |
fa6acb0c RS |
597 | error_report("Failed to unmap data on iSCSI lun. %s", |
598 | iscsi_get_error(iscsi)); | |
599 | acb->status = -EIO; | |
600 | } | |
601 | ||
cfb3f506 | 602 | iscsi_schedule_bh(acb); |
fa6acb0c RS |
603 | } |
604 | ||
1dde716e PL |
605 | static int iscsi_aio_discard_acb(IscsiAIOCB *acb) { |
606 | struct iscsi_context *iscsi = acb->iscsilun->iscsi; | |
fa6acb0c RS |
607 | struct unmap_list list[1]; |
608 | ||
fa6acb0c | 609 | acb->canceled = 0; |
1bd075f2 PB |
610 | acb->bh = NULL; |
611 | acb->status = -EINPROGRESS; | |
4790b03d | 612 | acb->buf = NULL; |
fa6acb0c | 613 | |
1dde716e PL |
614 | list[0].lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
615 | list[0].num = acb->nb_sectors * BDRV_SECTOR_SIZE / acb->iscsilun->block_size; | |
fa6acb0c | 616 | |
1dde716e | 617 | acb->task = iscsi_unmap_task(iscsi, acb->iscsilun->lun, |
fa6acb0c RS |
618 | 0, 0, &list[0], 1, |
619 | iscsi_unmap_cb, | |
620 | acb); | |
621 | if (acb->task == NULL) { | |
622 | error_report("iSCSI: Failed to send unmap command. %s", | |
623 | iscsi_get_error(iscsi)); | |
1dde716e PL |
624 | return -1; |
625 | } | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | static BlockDriverAIOCB * | |
631 | iscsi_aio_discard(BlockDriverState *bs, | |
632 | int64_t sector_num, int nb_sectors, | |
633 | BlockDriverCompletionFunc *cb, void *opaque) | |
634 | { | |
635 | IscsiLun *iscsilun = bs->opaque; | |
636 | IscsiAIOCB *acb; | |
637 | ||
638 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); | |
639 | ||
640 | acb->iscsilun = iscsilun; | |
641 | acb->nb_sectors = nb_sectors; | |
642 | acb->sector_num = sector_num; | |
643 | acb->retries = ISCSI_CMD_RETRIES; | |
644 | ||
645 | if (iscsi_aio_discard_acb(acb) != 0) { | |
fa6acb0c RS |
646 | qemu_aio_release(acb); |
647 | return NULL; | |
648 | } | |
649 | ||
650 | iscsi_set_events(iscsilun); | |
651 | ||
652 | return &acb->common; | |
653 | } | |
654 | ||
98392453 RS |
655 | #ifdef __linux__ |
656 | static void | |
657 | iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, | |
658 | void *command_data, void *opaque) | |
659 | { | |
660 | IscsiAIOCB *acb = opaque; | |
661 | ||
0a53f010 RS |
662 | g_free(acb->buf); |
663 | acb->buf = NULL; | |
664 | ||
b2090919 | 665 | if (acb->canceled != 0) { |
98392453 RS |
666 | return; |
667 | } | |
668 | ||
669 | acb->status = 0; | |
670 | if (status < 0) { | |
671 | error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s", | |
672 | iscsi_get_error(iscsi)); | |
673 | acb->status = -EIO; | |
674 | } | |
675 | ||
676 | acb->ioh->driver_status = 0; | |
677 | acb->ioh->host_status = 0; | |
678 | acb->ioh->resid = 0; | |
679 | ||
680 | #define SG_ERR_DRIVER_SENSE 0x08 | |
681 | ||
682 | if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { | |
683 | int ss; | |
684 | ||
685 | acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; | |
686 | ||
687 | acb->ioh->sb_len_wr = acb->task->datain.size - 2; | |
688 | ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? | |
689 | acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; | |
690 | memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss); | |
691 | } | |
692 | ||
cfb3f506 | 693 | iscsi_schedule_bh(acb); |
98392453 RS |
694 | } |
695 | ||
696 | static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, | |
697 | unsigned long int req, void *buf, | |
698 | BlockDriverCompletionFunc *cb, void *opaque) | |
699 | { | |
700 | IscsiLun *iscsilun = bs->opaque; | |
701 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
702 | struct iscsi_data data; | |
703 | IscsiAIOCB *acb; | |
704 | ||
705 | assert(req == SG_IO); | |
706 | ||
d7331bed | 707 | acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
98392453 RS |
708 | |
709 | acb->iscsilun = iscsilun; | |
710 | acb->canceled = 0; | |
1bd075f2 PB |
711 | acb->bh = NULL; |
712 | acb->status = -EINPROGRESS; | |
98392453 RS |
713 | acb->buf = NULL; |
714 | acb->ioh = buf; | |
715 | ||
716 | acb->task = malloc(sizeof(struct scsi_task)); | |
717 | if (acb->task == NULL) { | |
718 | error_report("iSCSI: Failed to allocate task for scsi command. %s", | |
719 | iscsi_get_error(iscsi)); | |
720 | qemu_aio_release(acb); | |
721 | return NULL; | |
722 | } | |
723 | memset(acb->task, 0, sizeof(struct scsi_task)); | |
724 | ||
725 | switch (acb->ioh->dxfer_direction) { | |
726 | case SG_DXFER_TO_DEV: | |
727 | acb->task->xfer_dir = SCSI_XFER_WRITE; | |
728 | break; | |
729 | case SG_DXFER_FROM_DEV: | |
730 | acb->task->xfer_dir = SCSI_XFER_READ; | |
731 | break; | |
732 | default: | |
733 | acb->task->xfer_dir = SCSI_XFER_NONE; | |
734 | break; | |
735 | } | |
736 | ||
737 | acb->task->cdb_size = acb->ioh->cmd_len; | |
738 | memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); | |
739 | acb->task->expxferlen = acb->ioh->dxfer_len; | |
740 | ||
0a53f010 | 741 | data.size = 0; |
98392453 | 742 | if (acb->task->xfer_dir == SCSI_XFER_WRITE) { |
0a53f010 RS |
743 | if (acb->ioh->iovec_count == 0) { |
744 | data.data = acb->ioh->dxferp; | |
745 | data.size = acb->ioh->dxfer_len; | |
746 | } else { | |
747 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
748 | scsi_task_set_iov_out(acb->task, | |
749 | (struct scsi_iovec *) acb->ioh->dxferp, | |
750 | acb->ioh->iovec_count); | |
751 | #else | |
752 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
753 | ||
754 | acb->buf = g_malloc(acb->ioh->dxfer_len); | |
755 | data.data = acb->buf; | |
756 | data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0, | |
757 | acb->buf, acb->ioh->dxfer_len); | |
758 | #endif | |
759 | } | |
98392453 | 760 | } |
0a53f010 | 761 | |
98392453 RS |
762 | if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, |
763 | iscsi_aio_ioctl_cb, | |
0a53f010 | 764 | (data.size > 0) ? &data : NULL, |
98392453 RS |
765 | acb) != 0) { |
766 | scsi_free_scsi_task(acb->task); | |
767 | qemu_aio_release(acb); | |
768 | return NULL; | |
769 | } | |
770 | ||
771 | /* tell libiscsi to read straight into the buffer we got from ioctl */ | |
772 | if (acb->task->xfer_dir == SCSI_XFER_READ) { | |
0a53f010 RS |
773 | if (acb->ioh->iovec_count == 0) { |
774 | scsi_task_add_data_in_buffer(acb->task, | |
775 | acb->ioh->dxfer_len, | |
776 | acb->ioh->dxferp); | |
777 | } else { | |
778 | #if defined(LIBISCSI_FEATURE_IOVECTOR) | |
779 | scsi_task_set_iov_in(acb->task, | |
780 | (struct scsi_iovec *) acb->ioh->dxferp, | |
781 | acb->ioh->iovec_count); | |
782 | #else | |
783 | int i; | |
784 | for (i = 0; i < acb->ioh->iovec_count; i++) { | |
785 | struct iovec *iov = (struct iovec *)acb->ioh->dxferp; | |
786 | ||
787 | scsi_task_add_data_in_buffer(acb->task, | |
788 | iov[i].iov_len, | |
789 | iov[i].iov_base); | |
790 | } | |
791 | #endif | |
792 | } | |
98392453 RS |
793 | } |
794 | ||
795 | iscsi_set_events(iscsilun); | |
796 | ||
797 | return &acb->common; | |
798 | } | |
799 | ||
f1a12821 RS |
800 | |
801 | static void ioctl_cb(void *opaque, int status) | |
802 | { | |
803 | int *p_status = opaque; | |
804 | *p_status = status; | |
805 | } | |
806 | ||
98392453 RS |
807 | static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
808 | { | |
809 | IscsiLun *iscsilun = bs->opaque; | |
f1a12821 | 810 | int status; |
98392453 RS |
811 | |
812 | switch (req) { | |
813 | case SG_GET_VERSION_NUM: | |
814 | *(int *)buf = 30000; | |
815 | break; | |
816 | case SG_GET_SCSI_ID: | |
817 | ((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type; | |
818 | break; | |
f1a12821 RS |
819 | case SG_IO: |
820 | status = -EINPROGRESS; | |
821 | iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); | |
822 | ||
823 | while (status == -EINPROGRESS) { | |
824 | qemu_aio_wait(); | |
825 | } | |
826 | ||
827 | return 0; | |
98392453 RS |
828 | default: |
829 | return -1; | |
830 | } | |
831 | return 0; | |
832 | } | |
833 | #endif | |
834 | ||
c589b249 RS |
835 | static int64_t |
836 | iscsi_getlength(BlockDriverState *bs) | |
837 | { | |
838 | IscsiLun *iscsilun = bs->opaque; | |
839 | int64_t len; | |
840 | ||
841 | len = iscsilun->num_blocks; | |
842 | len *= iscsilun->block_size; | |
843 | ||
844 | return len; | |
845 | } | |
846 | ||
f9dadc98 RS |
847 | static int parse_chap(struct iscsi_context *iscsi, const char *target) |
848 | { | |
849 | QemuOptsList *list; | |
850 | QemuOpts *opts; | |
851 | const char *user = NULL; | |
852 | const char *password = NULL; | |
853 | ||
854 | list = qemu_find_opts("iscsi"); | |
855 | if (!list) { | |
856 | return 0; | |
857 | } | |
858 | ||
859 | opts = qemu_opts_find(list, target); | |
860 | if (opts == NULL) { | |
861 | opts = QTAILQ_FIRST(&list->head); | |
862 | if (!opts) { | |
863 | return 0; | |
864 | } | |
865 | } | |
866 | ||
867 | user = qemu_opt_get(opts, "user"); | |
868 | if (!user) { | |
869 | return 0; | |
870 | } | |
871 | ||
872 | password = qemu_opt_get(opts, "password"); | |
873 | if (!password) { | |
874 | error_report("CHAP username specified but no password was given"); | |
875 | return -1; | |
876 | } | |
877 | ||
878 | if (iscsi_set_initiator_username_pwd(iscsi, user, password)) { | |
879 | error_report("Failed to set initiator username and password"); | |
880 | return -1; | |
881 | } | |
882 | ||
883 | return 0; | |
884 | } | |
885 | ||
886 | static void parse_header_digest(struct iscsi_context *iscsi, const char *target) | |
887 | { | |
888 | QemuOptsList *list; | |
889 | QemuOpts *opts; | |
890 | const char *digest = NULL; | |
891 | ||
892 | list = qemu_find_opts("iscsi"); | |
893 | if (!list) { | |
894 | return; | |
895 | } | |
896 | ||
897 | opts = qemu_opts_find(list, target); | |
898 | if (opts == NULL) { | |
899 | opts = QTAILQ_FIRST(&list->head); | |
900 | if (!opts) { | |
901 | return; | |
902 | } | |
903 | } | |
904 | ||
905 | digest = qemu_opt_get(opts, "header-digest"); | |
906 | if (!digest) { | |
907 | return; | |
908 | } | |
909 | ||
910 | if (!strcmp(digest, "CRC32C")) { | |
911 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); | |
912 | } else if (!strcmp(digest, "NONE")) { | |
913 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); | |
914 | } else if (!strcmp(digest, "CRC32C-NONE")) { | |
915 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); | |
916 | } else if (!strcmp(digest, "NONE-CRC32C")) { | |
917 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
918 | } else { | |
919 | error_report("Invalid header-digest setting : %s", digest); | |
920 | } | |
921 | } | |
922 | ||
923 | static char *parse_initiator_name(const char *target) | |
924 | { | |
925 | QemuOptsList *list; | |
926 | QemuOpts *opts; | |
5accc840 PB |
927 | const char *name; |
928 | char *iscsi_name; | |
929 | UuidInfo *uuid_info; | |
f9dadc98 RS |
930 | |
931 | list = qemu_find_opts("iscsi"); | |
f2ef4a6d PB |
932 | if (list) { |
933 | opts = qemu_opts_find(list, target); | |
f9dadc98 | 934 | if (!opts) { |
f2ef4a6d PB |
935 | opts = QTAILQ_FIRST(&list->head); |
936 | } | |
937 | if (opts) { | |
938 | name = qemu_opt_get(opts, "initiator-name"); | |
5accc840 PB |
939 | if (name) { |
940 | return g_strdup(name); | |
941 | } | |
f9dadc98 RS |
942 | } |
943 | } | |
944 | ||
5accc840 PB |
945 | uuid_info = qmp_query_uuid(NULL); |
946 | if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { | |
947 | name = qemu_get_vm_name(); | |
f2ef4a6d | 948 | } else { |
5accc840 | 949 | name = uuid_info->UUID; |
f9dadc98 | 950 | } |
5accc840 PB |
951 | iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s", |
952 | name ? ":" : "", name ? name : ""); | |
953 | qapi_free_UuidInfo(uuid_info); | |
954 | return iscsi_name; | |
f9dadc98 RS |
955 | } |
956 | ||
5b5d34ec PL |
957 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
958 | static void iscsi_nop_timed_event(void *opaque) | |
959 | { | |
960 | IscsiLun *iscsilun = opaque; | |
961 | ||
962 | if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) { | |
963 | error_report("iSCSI: NOP timeout. Reconnecting..."); | |
964 | iscsi_reconnect(iscsilun->iscsi); | |
965 | } | |
966 | ||
967 | if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { | |
968 | error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages."); | |
969 | return; | |
970 | } | |
971 | ||
bc72ad67 | 972 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
5b5d34ec PL |
973 | iscsi_set_events(iscsilun); |
974 | } | |
975 | #endif | |
976 | ||
cb1b83e7 PL |
977 | static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
978 | { | |
979 | struct scsi_task *task = NULL; | |
980 | struct scsi_readcapacity10 *rc10 = NULL; | |
981 | struct scsi_readcapacity16 *rc16 = NULL; | |
982 | int ret = 0; | |
983 | int retries = ISCSI_CMD_RETRIES; | |
984 | ||
1288844e PB |
985 | do { |
986 | if (task != NULL) { | |
987 | scsi_free_scsi_task(task); | |
988 | task = NULL; | |
cb1b83e7 | 989 | } |
1288844e PB |
990 | |
991 | switch (iscsilun->type) { | |
992 | case TYPE_DISK: | |
993 | task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); | |
994 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
995 | rc16 = scsi_datain_unmarshall(task); | |
996 | if (rc16 == NULL) { | |
997 | error_report("iSCSI: Failed to unmarshall readcapacity16 data."); | |
998 | ret = -EINVAL; | |
999 | } else { | |
1000 | iscsilun->block_size = rc16->block_length; | |
1001 | iscsilun->num_blocks = rc16->returned_lba + 1; | |
1002 | } | |
1003 | } | |
1004 | break; | |
1005 | case TYPE_ROM: | |
1006 | task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); | |
1007 | if (task != NULL && task->status == SCSI_STATUS_GOOD) { | |
1008 | rc10 = scsi_datain_unmarshall(task); | |
1009 | if (rc10 == NULL) { | |
1010 | error_report("iSCSI: Failed to unmarshall readcapacity10 data."); | |
1011 | ret = -EINVAL; | |
1012 | } else { | |
1013 | iscsilun->block_size = rc10->block_size; | |
1014 | if (rc10->lba == 0) { | |
1015 | /* blank disk loaded */ | |
1016 | iscsilun->num_blocks = 0; | |
1017 | } else { | |
1018 | iscsilun->num_blocks = rc10->lba + 1; | |
1019 | } | |
1020 | } | |
1021 | } | |
1022 | break; | |
1023 | default: | |
1024 | return 0; | |
cb1b83e7 | 1025 | } |
1288844e PB |
1026 | } while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1027 | && task->sense.key == SCSI_SENSE_UNIT_ATTENTION | |
1028 | && retries-- > 0); | |
cb1b83e7 | 1029 | |
1288844e PB |
1030 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1031 | error_report("iSCSI: failed to send readcapacity10 command."); | |
1032 | ret = -EINVAL; | |
1033 | } | |
cb1b83e7 PL |
1034 | if (task) { |
1035 | scsi_free_scsi_task(task); | |
1036 | } | |
cb1b83e7 PL |
1037 | return ret; |
1038 | } | |
1039 | ||
60beb341 KW |
1040 | /* TODO Convert to fine grained options */ |
1041 | static QemuOptsList runtime_opts = { | |
1042 | .name = "iscsi", | |
1043 | .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), | |
1044 | .desc = { | |
1045 | { | |
1046 | .name = "filename", | |
1047 | .type = QEMU_OPT_STRING, | |
1048 | .help = "URL to the iscsi image", | |
1049 | }, | |
1050 | { /* end of list */ } | |
1051 | }, | |
1052 | }; | |
1053 | ||
c589b249 RS |
1054 | /* |
1055 | * We support iscsi url's on the form | |
1056 | * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun> | |
1057 | */ | |
56d1b4d2 | 1058 | static int iscsi_open(BlockDriverState *bs, QDict *options, int flags) |
c589b249 RS |
1059 | { |
1060 | IscsiLun *iscsilun = bs->opaque; | |
1061 | struct iscsi_context *iscsi = NULL; | |
1062 | struct iscsi_url *iscsi_url = NULL; | |
e829b0bb PL |
1063 | struct scsi_task *task = NULL; |
1064 | struct scsi_inquiry_standard *inq = NULL; | |
f9dadc98 | 1065 | char *initiator_name = NULL; |
60beb341 KW |
1066 | QemuOpts *opts; |
1067 | Error *local_err = NULL; | |
1068 | const char *filename; | |
c589b249 RS |
1069 | int ret; |
1070 | ||
1071 | if ((BDRV_SECTOR_SIZE % 512) != 0) { | |
1072 | error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. " | |
1073 | "BDRV_SECTOR_SIZE(%lld) is not a multiple " | |
1074 | "of 512", BDRV_SECTOR_SIZE); | |
1075 | return -EINVAL; | |
1076 | } | |
1077 | ||
60beb341 KW |
1078 | opts = qemu_opts_create_nofail(&runtime_opts); |
1079 | qemu_opts_absorb_qdict(opts, options, &local_err); | |
1080 | if (error_is_set(&local_err)) { | |
1081 | qerror_report_err(local_err); | |
1082 | error_free(local_err); | |
1083 | ret = -EINVAL; | |
1084 | goto out; | |
1085 | } | |
1086 | ||
1087 | filename = qemu_opt_get(opts, "filename"); | |
1088 | ||
1089 | ||
c589b249 RS |
1090 | iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1091 | if (iscsi_url == NULL) { | |
8da1e18b | 1092 | error_report("Failed to parse URL : %s", filename); |
c589b249 | 1093 | ret = -EINVAL; |
b93c94f7 | 1094 | goto out; |
c589b249 RS |
1095 | } |
1096 | ||
f9dadc98 RS |
1097 | memset(iscsilun, 0, sizeof(IscsiLun)); |
1098 | ||
1099 | initiator_name = parse_initiator_name(iscsi_url->target); | |
1100 | ||
1101 | iscsi = iscsi_create_context(initiator_name); | |
1102 | if (iscsi == NULL) { | |
1103 | error_report("iSCSI: Failed to create iSCSI context."); | |
1104 | ret = -ENOMEM; | |
b93c94f7 | 1105 | goto out; |
f9dadc98 RS |
1106 | } |
1107 | ||
c589b249 RS |
1108 | if (iscsi_set_targetname(iscsi, iscsi_url->target)) { |
1109 | error_report("iSCSI: Failed to set target name."); | |
1110 | ret = -EINVAL; | |
b93c94f7 | 1111 | goto out; |
c589b249 RS |
1112 | } |
1113 | ||
1114 | if (iscsi_url->user != NULL) { | |
1115 | ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, | |
1116 | iscsi_url->passwd); | |
1117 | if (ret != 0) { | |
1118 | error_report("Failed to set initiator username and password"); | |
1119 | ret = -EINVAL; | |
b93c94f7 | 1120 | goto out; |
c589b249 RS |
1121 | } |
1122 | } | |
f9dadc98 RS |
1123 | |
1124 | /* check if we got CHAP username/password via the options */ | |
1125 | if (parse_chap(iscsi, iscsi_url->target) != 0) { | |
1126 | error_report("iSCSI: Failed to set CHAP user/password"); | |
1127 | ret = -EINVAL; | |
b93c94f7 | 1128 | goto out; |
f9dadc98 RS |
1129 | } |
1130 | ||
c589b249 RS |
1131 | if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1132 | error_report("iSCSI: Failed to set session type to normal."); | |
1133 | ret = -EINVAL; | |
b93c94f7 | 1134 | goto out; |
c589b249 RS |
1135 | } |
1136 | ||
1137 | iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); | |
1138 | ||
f9dadc98 RS |
1139 | /* check if we got HEADER_DIGEST via the options */ |
1140 | parse_header_digest(iscsi, iscsi_url->target); | |
1141 | ||
e829b0bb PL |
1142 | if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1143 | error_report("iSCSI: Failed to connect to LUN : %s", | |
1144 | iscsi_get_error(iscsi)); | |
1145 | ret = -EINVAL; | |
1146 | goto out; | |
1147 | } | |
c589b249 RS |
1148 | |
1149 | iscsilun->iscsi = iscsi; | |
1150 | iscsilun->lun = iscsi_url->lun; | |
1151 | ||
e829b0bb PL |
1152 | task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1153 | ||
1154 | if (task == NULL || task->status != SCSI_STATUS_GOOD) { | |
1155 | error_report("iSCSI: failed to send inquiry command."); | |
c589b249 | 1156 | ret = -EINVAL; |
b93c94f7 | 1157 | goto out; |
c589b249 RS |
1158 | } |
1159 | ||
e829b0bb PL |
1160 | inq = scsi_datain_unmarshall(task); |
1161 | if (inq == NULL) { | |
1162 | error_report("iSCSI: Failed to unmarshall inquiry data."); | |
c589b249 | 1163 | ret = -EINVAL; |
b93c94f7 | 1164 | goto out; |
c589b249 | 1165 | } |
622695a4 | 1166 | |
e829b0bb PL |
1167 | iscsilun->type = inq->periperal_device_type; |
1168 | ||
cb1b83e7 PL |
1169 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1170 | goto out; | |
e829b0bb | 1171 | } |
0777b5dd | 1172 | bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
e829b0bb | 1173 | |
622695a4 RS |
1174 | /* Medium changer or tape. We dont have any emulation for this so this must |
1175 | * be sg ioctl compatible. We force it to be sg, otherwise qemu will try | |
1176 | * to read from the device to guess the image format. | |
1177 | */ | |
1178 | if (iscsilun->type == TYPE_MEDIUM_CHANGER || | |
1179 | iscsilun->type == TYPE_TAPE) { | |
1180 | bs->sg = 1; | |
1181 | } | |
1182 | ||
5b5d34ec PL |
1183 | #if defined(LIBISCSI_FEATURE_NOP_COUNTER) |
1184 | /* Set up a timer for sending out iSCSI NOPs */ | |
bc72ad67 AB |
1185 | iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
1186 | timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); | |
5b5d34ec PL |
1187 | #endif |
1188 | ||
b93c94f7 | 1189 | out: |
60beb341 | 1190 | qemu_opts_del(opts); |
f9dadc98 RS |
1191 | if (initiator_name != NULL) { |
1192 | g_free(initiator_name); | |
1193 | } | |
c589b249 RS |
1194 | if (iscsi_url != NULL) { |
1195 | iscsi_destroy_url(iscsi_url); | |
1196 | } | |
e829b0bb PL |
1197 | if (task != NULL) { |
1198 | scsi_free_scsi_task(task); | |
1199 | } | |
b93c94f7 PB |
1200 | |
1201 | if (ret) { | |
1202 | if (iscsi != NULL) { | |
1203 | iscsi_destroy_context(iscsi); | |
1204 | } | |
1205 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
c589b249 | 1206 | } |
c589b249 RS |
1207 | return ret; |
1208 | } | |
1209 | ||
1210 | static void iscsi_close(BlockDriverState *bs) | |
1211 | { | |
1212 | IscsiLun *iscsilun = bs->opaque; | |
1213 | struct iscsi_context *iscsi = iscsilun->iscsi; | |
1214 | ||
5b5d34ec | 1215 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1216 | timer_del(iscsilun->nop_timer); |
1217 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1218 | } |
f2e5dca4 | 1219 | qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
c589b249 RS |
1220 | iscsi_destroy_context(iscsi); |
1221 | memset(iscsilun, 0, sizeof(IscsiLun)); | |
1222 | } | |
1223 | ||
cb1b83e7 PL |
1224 | static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1225 | { | |
1226 | IscsiLun *iscsilun = bs->opaque; | |
1227 | int ret = 0; | |
1228 | ||
1229 | if (iscsilun->type != TYPE_DISK) { | |
1230 | return -ENOTSUP; | |
1231 | } | |
1232 | ||
1233 | if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { | |
1234 | return ret; | |
1235 | } | |
1236 | ||
1237 | if (offset > iscsi_getlength(bs)) { | |
1238 | return -EINVAL; | |
1239 | } | |
1240 | ||
1241 | return 0; | |
1242 | } | |
1243 | ||
f807ecd5 PL |
1244 | static int iscsi_has_zero_init(BlockDriverState *bs) |
1245 | { | |
1246 | return 0; | |
1247 | } | |
1248 | ||
de8864e5 PL |
1249 | static int iscsi_create(const char *filename, QEMUOptionParameter *options) |
1250 | { | |
1251 | int ret = 0; | |
1252 | int64_t total_size = 0; | |
13c91cb7 | 1253 | BlockDriverState *bs; |
de8864e5 | 1254 | IscsiLun *iscsilun = NULL; |
60beb341 | 1255 | QDict *bs_options; |
de8864e5 | 1256 | |
13c91cb7 | 1257 | bs = bdrv_new(""); |
de8864e5 PL |
1258 | |
1259 | /* Read out options */ | |
1260 | while (options && options->name) { | |
1261 | if (!strcmp(options->name, "size")) { | |
1262 | total_size = options->value.n / BDRV_SECTOR_SIZE; | |
1263 | } | |
1264 | options++; | |
1265 | } | |
1266 | ||
13c91cb7 FZ |
1267 | bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
1268 | iscsilun = bs->opaque; | |
de8864e5 | 1269 | |
60beb341 KW |
1270 | bs_options = qdict_new(); |
1271 | qdict_put(bs_options, "filename", qstring_from_str(filename)); | |
13c91cb7 | 1272 | ret = iscsi_open(bs, bs_options, 0); |
60beb341 KW |
1273 | QDECREF(bs_options); |
1274 | ||
de8864e5 PL |
1275 | if (ret != 0) { |
1276 | goto out; | |
1277 | } | |
5b5d34ec | 1278 | if (iscsilun->nop_timer) { |
bc72ad67 AB |
1279 | timer_del(iscsilun->nop_timer); |
1280 | timer_free(iscsilun->nop_timer); | |
5b5d34ec | 1281 | } |
de8864e5 PL |
1282 | if (iscsilun->type != TYPE_DISK) { |
1283 | ret = -ENODEV; | |
1284 | goto out; | |
1285 | } | |
13c91cb7 | 1286 | if (bs->total_sectors < total_size) { |
de8864e5 | 1287 | ret = -ENOSPC; |
d3bda7bc | 1288 | goto out; |
de8864e5 PL |
1289 | } |
1290 | ||
1291 | ret = 0; | |
1292 | out: | |
1293 | if (iscsilun->iscsi != NULL) { | |
1294 | iscsi_destroy_context(iscsilun->iscsi); | |
1295 | } | |
13c91cb7 FZ |
1296 | g_free(bs->opaque); |
1297 | bs->opaque = NULL; | |
4f6fd349 | 1298 | bdrv_unref(bs); |
de8864e5 PL |
1299 | return ret; |
1300 | } | |
1301 | ||
1302 | static QEMUOptionParameter iscsi_create_options[] = { | |
1303 | { | |
1304 | .name = BLOCK_OPT_SIZE, | |
1305 | .type = OPT_SIZE, | |
1306 | .help = "Virtual disk size" | |
1307 | }, | |
1308 | { NULL } | |
1309 | }; | |
1310 | ||
c589b249 RS |
1311 | static BlockDriver bdrv_iscsi = { |
1312 | .format_name = "iscsi", | |
1313 | .protocol_name = "iscsi", | |
1314 | ||
1315 | .instance_size = sizeof(IscsiLun), | |
1316 | .bdrv_file_open = iscsi_open, | |
1317 | .bdrv_close = iscsi_close, | |
de8864e5 PL |
1318 | .bdrv_create = iscsi_create, |
1319 | .create_options = iscsi_create_options, | |
c589b249 RS |
1320 | |
1321 | .bdrv_getlength = iscsi_getlength, | |
cb1b83e7 | 1322 | .bdrv_truncate = iscsi_truncate, |
c589b249 RS |
1323 | |
1324 | .bdrv_aio_readv = iscsi_aio_readv, | |
1325 | .bdrv_aio_writev = iscsi_aio_writev, | |
1326 | .bdrv_aio_flush = iscsi_aio_flush, | |
fa6acb0c RS |
1327 | |
1328 | .bdrv_aio_discard = iscsi_aio_discard, | |
f807ecd5 | 1329 | .bdrv_has_zero_init = iscsi_has_zero_init, |
98392453 RS |
1330 | |
1331 | #ifdef __linux__ | |
1332 | .bdrv_ioctl = iscsi_ioctl, | |
1333 | .bdrv_aio_ioctl = iscsi_aio_ioctl, | |
1334 | #endif | |
c589b249 RS |
1335 | }; |
1336 | ||
4d454574 PB |
1337 | static QemuOptsList qemu_iscsi_opts = { |
1338 | .name = "iscsi", | |
1339 | .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), | |
1340 | .desc = { | |
1341 | { | |
1342 | .name = "user", | |
1343 | .type = QEMU_OPT_STRING, | |
1344 | .help = "username for CHAP authentication to target", | |
1345 | },{ | |
1346 | .name = "password", | |
1347 | .type = QEMU_OPT_STRING, | |
1348 | .help = "password for CHAP authentication to target", | |
1349 | },{ | |
1350 | .name = "header-digest", | |
1351 | .type = QEMU_OPT_STRING, | |
1352 | .help = "HeaderDigest setting. " | |
1353 | "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}", | |
1354 | },{ | |
1355 | .name = "initiator-name", | |
1356 | .type = QEMU_OPT_STRING, | |
1357 | .help = "Initiator iqn name to use when connecting", | |
1358 | }, | |
1359 | { /* end of list */ } | |
1360 | }, | |
1361 | }; | |
1362 | ||
c589b249 RS |
1363 | static void iscsi_block_init(void) |
1364 | { | |
1365 | bdrv_register(&bdrv_iscsi); | |
4d454574 | 1366 | qemu_add_opts(&qemu_iscsi_opts); |
c589b249 RS |
1367 | } |
1368 | ||
1369 | block_init(iscsi_block_init); |