root / block / iscsi.c @ 65f3e339
History | View | Annotate | Download (42.3 kB)
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> |
28 |
#include <arpa/inet.h> |
29 |
#include "qemu-common.h" |
30 |
#include "qemu/config-file.h" |
31 |
#include "qemu/error-report.h" |
32 |
#include "block/block_int.h" |
33 |
#include "trace.h" |
34 |
#include "block/scsi.h" |
35 |
#include "qemu/iov.h" |
36 |
#include "sysemu/sysemu.h" |
37 |
#include "qmp-commands.h" |
38 |
|
39 |
#include <iscsi/iscsi.h> |
40 |
#include <iscsi/scsi-lowlevel.h> |
41 |
|
42 |
#ifdef __linux__
|
43 |
#include <scsi/sg.h> |
44 |
#include <block/scsi.h> |
45 |
#endif
|
46 |
|
47 |
typedef struct IscsiLun { |
48 |
struct iscsi_context *iscsi;
|
49 |
int lun;
|
50 |
enum scsi_inquiry_peripheral_device_type type;
|
51 |
int block_size;
|
52 |
uint64_t num_blocks; |
53 |
int events;
|
54 |
QEMUTimer *nop_timer; |
55 |
uint8_t lbpme; |
56 |
uint8_t lbprz; |
57 |
struct scsi_inquiry_logical_block_provisioning lbp;
|
58 |
struct scsi_inquiry_block_limits bl;
|
59 |
} IscsiLun; |
60 |
|
61 |
typedef struct IscsiTask { |
62 |
int status;
|
63 |
int complete;
|
64 |
int retries;
|
65 |
int do_retry;
|
66 |
struct scsi_task *task;
|
67 |
Coroutine *co; |
68 |
} IscsiTask; |
69 |
|
70 |
typedef struct IscsiAIOCB { |
71 |
BlockDriverAIOCB common; |
72 |
QEMUIOVector *qiov; |
73 |
QEMUBH *bh; |
74 |
IscsiLun *iscsilun; |
75 |
struct scsi_task *task;
|
76 |
uint8_t *buf; |
77 |
int status;
|
78 |
int canceled;
|
79 |
int retries;
|
80 |
int64_t sector_num; |
81 |
int nb_sectors;
|
82 |
#ifdef __linux__
|
83 |
sg_io_hdr_t *ioh; |
84 |
#endif
|
85 |
} IscsiAIOCB; |
86 |
|
87 |
#define NOP_INTERVAL 5000 |
88 |
#define MAX_NOP_FAILURES 3 |
89 |
#define ISCSI_CMD_RETRIES 5 |
90 |
#define ISCSI_MAX_UNMAP 131072 |
91 |
|
92 |
static void |
93 |
iscsi_bh_cb(void *p)
|
94 |
{ |
95 |
IscsiAIOCB *acb = p; |
96 |
|
97 |
qemu_bh_delete(acb->bh); |
98 |
|
99 |
g_free(acb->buf); |
100 |
acb->buf = NULL;
|
101 |
|
102 |
if (acb->canceled == 0) { |
103 |
acb->common.cb(acb->common.opaque, acb->status); |
104 |
} |
105 |
|
106 |
if (acb->task != NULL) { |
107 |
scsi_free_scsi_task(acb->task); |
108 |
acb->task = NULL;
|
109 |
} |
110 |
|
111 |
qemu_aio_release(acb); |
112 |
} |
113 |
|
114 |
static void |
115 |
iscsi_schedule_bh(IscsiAIOCB *acb) |
116 |
{ |
117 |
if (acb->bh) {
|
118 |
return;
|
119 |
} |
120 |
acb->bh = qemu_bh_new(iscsi_bh_cb, acb); |
121 |
qemu_bh_schedule(acb->bh); |
122 |
} |
123 |
|
124 |
static void |
125 |
iscsi_co_generic_cb(struct iscsi_context *iscsi, int status, |
126 |
void *command_data, void *opaque) |
127 |
{ |
128 |
struct IscsiTask *iTask = opaque;
|
129 |
struct scsi_task *task = command_data;
|
130 |
|
131 |
iTask->complete = 1;
|
132 |
iTask->status = status; |
133 |
iTask->do_retry = 0;
|
134 |
iTask->task = task; |
135 |
|
136 |
if (iTask->retries-- > 0 && status == SCSI_STATUS_CHECK_CONDITION |
137 |
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION) { |
138 |
iTask->do_retry = 1;
|
139 |
goto out;
|
140 |
} |
141 |
|
142 |
if (status != SCSI_STATUS_GOOD) {
|
143 |
error_report("iSCSI: Failure. %s", iscsi_get_error(iscsi));
|
144 |
} |
145 |
|
146 |
out:
|
147 |
if (iTask->co) {
|
148 |
qemu_coroutine_enter(iTask->co, NULL);
|
149 |
} |
150 |
} |
151 |
|
152 |
static void iscsi_co_init_iscsitask(IscsiLun *iscsilun, struct IscsiTask *iTask) |
153 |
{ |
154 |
*iTask = (struct IscsiTask) {
|
155 |
.co = qemu_coroutine_self(), |
156 |
.retries = ISCSI_CMD_RETRIES, |
157 |
}; |
158 |
} |
159 |
|
160 |
static void |
161 |
iscsi_abort_task_cb(struct iscsi_context *iscsi, int status, void *command_data, |
162 |
void *private_data)
|
163 |
{ |
164 |
IscsiAIOCB *acb = private_data; |
165 |
|
166 |
acb->status = -ECANCELED; |
167 |
iscsi_schedule_bh(acb); |
168 |
} |
169 |
|
170 |
static void |
171 |
iscsi_aio_cancel(BlockDriverAIOCB *blockacb) |
172 |
{ |
173 |
IscsiAIOCB *acb = (IscsiAIOCB *)blockacb; |
174 |
IscsiLun *iscsilun = acb->iscsilun; |
175 |
|
176 |
if (acb->status != -EINPROGRESS) {
|
177 |
return;
|
178 |
} |
179 |
|
180 |
acb->canceled = 1;
|
181 |
|
182 |
/* send a task mgmt call to the target to cancel the task on the target */
|
183 |
iscsi_task_mgmt_abort_task_async(iscsilun->iscsi, acb->task, |
184 |
iscsi_abort_task_cb, acb); |
185 |
|
186 |
while (acb->status == -EINPROGRESS) {
|
187 |
qemu_aio_wait(); |
188 |
} |
189 |
} |
190 |
|
191 |
static const AIOCBInfo iscsi_aiocb_info = { |
192 |
.aiocb_size = sizeof(IscsiAIOCB),
|
193 |
.cancel = iscsi_aio_cancel, |
194 |
}; |
195 |
|
196 |
|
197 |
static void iscsi_process_read(void *arg); |
198 |
static void iscsi_process_write(void *arg); |
199 |
|
200 |
static void |
201 |
iscsi_set_events(IscsiLun *iscsilun) |
202 |
{ |
203 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
204 |
int ev;
|
205 |
|
206 |
/* We always register a read handler. */
|
207 |
ev = POLLIN; |
208 |
ev |= iscsi_which_events(iscsi); |
209 |
if (ev != iscsilun->events) {
|
210 |
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), |
211 |
iscsi_process_read, |
212 |
(ev & POLLOUT) ? iscsi_process_write : NULL,
|
213 |
iscsilun); |
214 |
|
215 |
} |
216 |
|
217 |
iscsilun->events = ev; |
218 |
} |
219 |
|
220 |
static void |
221 |
iscsi_process_read(void *arg)
|
222 |
{ |
223 |
IscsiLun *iscsilun = arg; |
224 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
225 |
|
226 |
iscsi_service(iscsi, POLLIN); |
227 |
iscsi_set_events(iscsilun); |
228 |
} |
229 |
|
230 |
static void |
231 |
iscsi_process_write(void *arg)
|
232 |
{ |
233 |
IscsiLun *iscsilun = arg; |
234 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
235 |
|
236 |
iscsi_service(iscsi, POLLOUT); |
237 |
iscsi_set_events(iscsilun); |
238 |
} |
239 |
|
240 |
static int |
241 |
iscsi_aio_writev_acb(IscsiAIOCB *acb); |
242 |
|
243 |
static void |
244 |
iscsi_aio_write16_cb(struct iscsi_context *iscsi, int status, |
245 |
void *command_data, void *opaque) |
246 |
{ |
247 |
IscsiAIOCB *acb = opaque; |
248 |
|
249 |
trace_iscsi_aio_write16_cb(iscsi, status, acb, acb->canceled); |
250 |
|
251 |
g_free(acb->buf); |
252 |
acb->buf = NULL;
|
253 |
|
254 |
if (acb->canceled != 0) { |
255 |
return;
|
256 |
} |
257 |
|
258 |
acb->status = 0;
|
259 |
if (status != 0) { |
260 |
if (status == SCSI_STATUS_CHECK_CONDITION
|
261 |
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
262 |
&& acb->retries-- > 0) {
|
263 |
scsi_free_scsi_task(acb->task); |
264 |
acb->task = NULL;
|
265 |
if (iscsi_aio_writev_acb(acb) == 0) { |
266 |
iscsi_set_events(acb->iscsilun); |
267 |
return;
|
268 |
} |
269 |
} |
270 |
error_report("Failed to write16 data to iSCSI lun. %s",
|
271 |
iscsi_get_error(iscsi)); |
272 |
acb->status = -EIO; |
273 |
} |
274 |
|
275 |
iscsi_schedule_bh(acb); |
276 |
} |
277 |
|
278 |
static int64_t sector_lun2qemu(int64_t sector, IscsiLun *iscsilun)
|
279 |
{ |
280 |
return sector * iscsilun->block_size / BDRV_SECTOR_SIZE;
|
281 |
} |
282 |
|
283 |
static int64_t sector_qemu2lun(int64_t sector, IscsiLun *iscsilun)
|
284 |
{ |
285 |
return sector * BDRV_SECTOR_SIZE / iscsilun->block_size;
|
286 |
} |
287 |
|
288 |
static bool is_request_lun_aligned(int64_t sector_num, int nb_sectors, |
289 |
IscsiLun *iscsilun) |
290 |
{ |
291 |
if ((sector_num * BDRV_SECTOR_SIZE) % iscsilun->block_size ||
|
292 |
(nb_sectors * BDRV_SECTOR_SIZE) % iscsilun->block_size) { |
293 |
error_report("iSCSI misaligned request: "
|
294 |
"iscsilun->block_size %u, sector_num %" PRIi64
|
295 |
", nb_sectors %d",
|
296 |
iscsilun->block_size, sector_num, nb_sectors); |
297 |
return 0; |
298 |
} |
299 |
return 1; |
300 |
} |
301 |
|
302 |
static int |
303 |
iscsi_aio_writev_acb(IscsiAIOCB *acb) |
304 |
{ |
305 |
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
306 |
size_t size; |
307 |
uint32_t num_sectors; |
308 |
uint64_t lba; |
309 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
310 |
struct iscsi_data data;
|
311 |
#endif
|
312 |
int ret;
|
313 |
|
314 |
acb->canceled = 0;
|
315 |
acb->bh = NULL;
|
316 |
acb->status = -EINPROGRESS; |
317 |
acb->buf = NULL;
|
318 |
|
319 |
/* this will allow us to get rid of 'buf' completely */
|
320 |
size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
321 |
|
322 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
323 |
data.size = MIN(size, acb->qiov->size); |
324 |
|
325 |
/* if the iovec only contains one buffer we can pass it directly */
|
326 |
if (acb->qiov->niov == 1) { |
327 |
data.data = acb->qiov->iov[0].iov_base;
|
328 |
} else {
|
329 |
acb->buf = g_malloc(data.size); |
330 |
qemu_iovec_to_buf(acb->qiov, 0, acb->buf, data.size);
|
331 |
data.data = acb->buf; |
332 |
} |
333 |
#endif
|
334 |
|
335 |
acb->task = malloc(sizeof(struct scsi_task)); |
336 |
if (acb->task == NULL) { |
337 |
error_report("iSCSI: Failed to allocate task for scsi WRITE16 "
|
338 |
"command. %s", iscsi_get_error(iscsi));
|
339 |
return -1; |
340 |
} |
341 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
342 |
|
343 |
acb->task->xfer_dir = SCSI_XFER_WRITE; |
344 |
acb->task->cdb_size = 16;
|
345 |
acb->task->cdb[0] = 0x8a; |
346 |
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
347 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
348 |
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); |
349 |
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
350 |
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
|
351 |
acb->task->expxferlen = size; |
352 |
|
353 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
354 |
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
355 |
iscsi_aio_write16_cb, |
356 |
NULL,
|
357 |
acb); |
358 |
#else
|
359 |
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
360 |
iscsi_aio_write16_cb, |
361 |
&data, |
362 |
acb); |
363 |
#endif
|
364 |
if (ret != 0) { |
365 |
scsi_free_scsi_task(acb->task); |
366 |
g_free(acb->buf); |
367 |
return -1; |
368 |
} |
369 |
|
370 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
371 |
scsi_task_set_iov_out(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
372 |
#endif
|
373 |
|
374 |
return 0; |
375 |
} |
376 |
|
377 |
static BlockDriverAIOCB *
|
378 |
iscsi_aio_writev(BlockDriverState *bs, int64_t sector_num, |
379 |
QEMUIOVector *qiov, int nb_sectors,
|
380 |
BlockDriverCompletionFunc *cb, |
381 |
void *opaque)
|
382 |
{ |
383 |
IscsiLun *iscsilun = bs->opaque; |
384 |
IscsiAIOCB *acb; |
385 |
|
386 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
387 |
return NULL; |
388 |
} |
389 |
|
390 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
391 |
trace_iscsi_aio_writev(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); |
392 |
|
393 |
acb->iscsilun = iscsilun; |
394 |
acb->qiov = qiov; |
395 |
acb->nb_sectors = nb_sectors; |
396 |
acb->sector_num = sector_num; |
397 |
acb->retries = ISCSI_CMD_RETRIES; |
398 |
|
399 |
if (iscsi_aio_writev_acb(acb) != 0) { |
400 |
qemu_aio_release(acb); |
401 |
return NULL; |
402 |
} |
403 |
|
404 |
iscsi_set_events(iscsilun); |
405 |
return &acb->common;
|
406 |
} |
407 |
|
408 |
static int |
409 |
iscsi_aio_readv_acb(IscsiAIOCB *acb); |
410 |
|
411 |
static void |
412 |
iscsi_aio_read16_cb(struct iscsi_context *iscsi, int status, |
413 |
void *command_data, void *opaque) |
414 |
{ |
415 |
IscsiAIOCB *acb = opaque; |
416 |
|
417 |
trace_iscsi_aio_read16_cb(iscsi, status, acb, acb->canceled); |
418 |
|
419 |
if (acb->canceled != 0) { |
420 |
return;
|
421 |
} |
422 |
|
423 |
acb->status = 0;
|
424 |
if (status != 0) { |
425 |
if (status == SCSI_STATUS_CHECK_CONDITION
|
426 |
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
427 |
&& acb->retries-- > 0) {
|
428 |
scsi_free_scsi_task(acb->task); |
429 |
acb->task = NULL;
|
430 |
if (iscsi_aio_readv_acb(acb) == 0) { |
431 |
iscsi_set_events(acb->iscsilun); |
432 |
return;
|
433 |
} |
434 |
} |
435 |
error_report("Failed to read16 data from iSCSI lun. %s",
|
436 |
iscsi_get_error(iscsi)); |
437 |
acb->status = -EIO; |
438 |
} |
439 |
|
440 |
iscsi_schedule_bh(acb); |
441 |
} |
442 |
|
443 |
static int |
444 |
iscsi_aio_readv_acb(IscsiAIOCB *acb) |
445 |
{ |
446 |
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
447 |
size_t size; |
448 |
uint64_t lba; |
449 |
uint32_t num_sectors; |
450 |
int ret;
|
451 |
#if !defined(LIBISCSI_FEATURE_IOVECTOR)
|
452 |
int i;
|
453 |
#endif
|
454 |
|
455 |
acb->canceled = 0;
|
456 |
acb->bh = NULL;
|
457 |
acb->status = -EINPROGRESS; |
458 |
acb->buf = NULL;
|
459 |
|
460 |
size = acb->nb_sectors * BDRV_SECTOR_SIZE; |
461 |
|
462 |
acb->task = malloc(sizeof(struct scsi_task)); |
463 |
if (acb->task == NULL) { |
464 |
error_report("iSCSI: Failed to allocate task for scsi READ16 "
|
465 |
"command. %s", iscsi_get_error(iscsi));
|
466 |
return -1; |
467 |
} |
468 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
469 |
|
470 |
acb->task->xfer_dir = SCSI_XFER_READ; |
471 |
acb->task->expxferlen = size; |
472 |
lba = sector_qemu2lun(acb->sector_num, acb->iscsilun); |
473 |
num_sectors = sector_qemu2lun(acb->nb_sectors, acb->iscsilun); |
474 |
|
475 |
switch (acb->iscsilun->type) {
|
476 |
case TYPE_DISK:
|
477 |
acb->task->cdb_size = 16;
|
478 |
acb->task->cdb[0] = 0x88; |
479 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba >> 32); |
480 |
*(uint32_t *)&acb->task->cdb[6] = htonl(lba & 0xffffffff); |
481 |
*(uint32_t *)&acb->task->cdb[10] = htonl(num_sectors);
|
482 |
break;
|
483 |
default:
|
484 |
acb->task->cdb_size = 10;
|
485 |
acb->task->cdb[0] = 0x28; |
486 |
*(uint32_t *)&acb->task->cdb[2] = htonl(lba);
|
487 |
*(uint16_t *)&acb->task->cdb[7] = htons(num_sectors);
|
488 |
break;
|
489 |
} |
490 |
|
491 |
ret = iscsi_scsi_command_async(iscsi, acb->iscsilun->lun, acb->task, |
492 |
iscsi_aio_read16_cb, |
493 |
NULL,
|
494 |
acb); |
495 |
if (ret != 0) { |
496 |
scsi_free_scsi_task(acb->task); |
497 |
return -1; |
498 |
} |
499 |
|
500 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
501 |
scsi_task_set_iov_in(acb->task, (struct scsi_iovec*) acb->qiov->iov, acb->qiov->niov);
|
502 |
#else
|
503 |
for (i = 0; i < acb->qiov->niov; i++) { |
504 |
scsi_task_add_data_in_buffer(acb->task, |
505 |
acb->qiov->iov[i].iov_len, |
506 |
acb->qiov->iov[i].iov_base); |
507 |
} |
508 |
#endif
|
509 |
return 0; |
510 |
} |
511 |
|
512 |
static BlockDriverAIOCB *
|
513 |
iscsi_aio_readv(BlockDriverState *bs, int64_t sector_num, |
514 |
QEMUIOVector *qiov, int nb_sectors,
|
515 |
BlockDriverCompletionFunc *cb, |
516 |
void *opaque)
|
517 |
{ |
518 |
IscsiLun *iscsilun = bs->opaque; |
519 |
IscsiAIOCB *acb; |
520 |
|
521 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
522 |
return NULL; |
523 |
} |
524 |
|
525 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
526 |
trace_iscsi_aio_readv(iscsilun->iscsi, sector_num, nb_sectors, opaque, acb); |
527 |
|
528 |
acb->nb_sectors = nb_sectors; |
529 |
acb->sector_num = sector_num; |
530 |
acb->iscsilun = iscsilun; |
531 |
acb->qiov = qiov; |
532 |
acb->retries = ISCSI_CMD_RETRIES; |
533 |
|
534 |
if (iscsi_aio_readv_acb(acb) != 0) { |
535 |
qemu_aio_release(acb); |
536 |
return NULL; |
537 |
} |
538 |
|
539 |
iscsi_set_events(iscsilun); |
540 |
return &acb->common;
|
541 |
} |
542 |
|
543 |
static int |
544 |
iscsi_aio_flush_acb(IscsiAIOCB *acb); |
545 |
|
546 |
static void |
547 |
iscsi_synccache10_cb(struct iscsi_context *iscsi, int status, |
548 |
void *command_data, void *opaque) |
549 |
{ |
550 |
IscsiAIOCB *acb = opaque; |
551 |
|
552 |
if (acb->canceled != 0) { |
553 |
return;
|
554 |
} |
555 |
|
556 |
acb->status = 0;
|
557 |
if (status != 0) { |
558 |
if (status == SCSI_STATUS_CHECK_CONDITION
|
559 |
&& acb->task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
560 |
&& acb->retries-- > 0) {
|
561 |
scsi_free_scsi_task(acb->task); |
562 |
acb->task = NULL;
|
563 |
if (iscsi_aio_flush_acb(acb) == 0) { |
564 |
iscsi_set_events(acb->iscsilun); |
565 |
return;
|
566 |
} |
567 |
} |
568 |
error_report("Failed to sync10 data on iSCSI lun. %s",
|
569 |
iscsi_get_error(iscsi)); |
570 |
acb->status = -EIO; |
571 |
} |
572 |
|
573 |
iscsi_schedule_bh(acb); |
574 |
} |
575 |
|
576 |
static int |
577 |
iscsi_aio_flush_acb(IscsiAIOCB *acb) |
578 |
{ |
579 |
struct iscsi_context *iscsi = acb->iscsilun->iscsi;
|
580 |
|
581 |
acb->canceled = 0;
|
582 |
acb->bh = NULL;
|
583 |
acb->status = -EINPROGRESS; |
584 |
acb->buf = NULL;
|
585 |
|
586 |
acb->task = iscsi_synchronizecache10_task(iscsi, acb->iscsilun->lun, |
587 |
0, 0, 0, 0, |
588 |
iscsi_synccache10_cb, |
589 |
acb); |
590 |
if (acb->task == NULL) { |
591 |
error_report("iSCSI: Failed to send synchronizecache10 command. %s",
|
592 |
iscsi_get_error(iscsi)); |
593 |
return -1; |
594 |
} |
595 |
|
596 |
return 0; |
597 |
} |
598 |
|
599 |
static BlockDriverAIOCB *
|
600 |
iscsi_aio_flush(BlockDriverState *bs, |
601 |
BlockDriverCompletionFunc *cb, void *opaque)
|
602 |
{ |
603 |
IscsiLun *iscsilun = bs->opaque; |
604 |
|
605 |
IscsiAIOCB *acb; |
606 |
|
607 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
608 |
|
609 |
acb->iscsilun = iscsilun; |
610 |
acb->retries = ISCSI_CMD_RETRIES; |
611 |
|
612 |
if (iscsi_aio_flush_acb(acb) != 0) { |
613 |
qemu_aio_release(acb); |
614 |
return NULL; |
615 |
} |
616 |
|
617 |
iscsi_set_events(iscsilun); |
618 |
|
619 |
return &acb->common;
|
620 |
} |
621 |
|
622 |
#ifdef __linux__
|
623 |
static void |
624 |
iscsi_aio_ioctl_cb(struct iscsi_context *iscsi, int status, |
625 |
void *command_data, void *opaque) |
626 |
{ |
627 |
IscsiAIOCB *acb = opaque; |
628 |
|
629 |
g_free(acb->buf); |
630 |
acb->buf = NULL;
|
631 |
|
632 |
if (acb->canceled != 0) { |
633 |
return;
|
634 |
} |
635 |
|
636 |
acb->status = 0;
|
637 |
if (status < 0) { |
638 |
error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
|
639 |
iscsi_get_error(iscsi)); |
640 |
acb->status = -EIO; |
641 |
} |
642 |
|
643 |
acb->ioh->driver_status = 0;
|
644 |
acb->ioh->host_status = 0;
|
645 |
acb->ioh->resid = 0;
|
646 |
|
647 |
#define SG_ERR_DRIVER_SENSE 0x08 |
648 |
|
649 |
if (status == SCSI_STATUS_CHECK_CONDITION && acb->task->datain.size >= 2) { |
650 |
int ss;
|
651 |
|
652 |
acb->ioh->driver_status |= SG_ERR_DRIVER_SENSE; |
653 |
|
654 |
acb->ioh->sb_len_wr = acb->task->datain.size - 2;
|
655 |
ss = (acb->ioh->mx_sb_len >= acb->ioh->sb_len_wr) ? |
656 |
acb->ioh->mx_sb_len : acb->ioh->sb_len_wr; |
657 |
memcpy(acb->ioh->sbp, &acb->task->datain.data[2], ss);
|
658 |
} |
659 |
|
660 |
iscsi_schedule_bh(acb); |
661 |
} |
662 |
|
663 |
static BlockDriverAIOCB *iscsi_aio_ioctl(BlockDriverState *bs,
|
664 |
unsigned long int req, void *buf, |
665 |
BlockDriverCompletionFunc *cb, void *opaque)
|
666 |
{ |
667 |
IscsiLun *iscsilun = bs->opaque; |
668 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
669 |
struct iscsi_data data;
|
670 |
IscsiAIOCB *acb; |
671 |
|
672 |
assert(req == SG_IO); |
673 |
|
674 |
acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); |
675 |
|
676 |
acb->iscsilun = iscsilun; |
677 |
acb->canceled = 0;
|
678 |
acb->bh = NULL;
|
679 |
acb->status = -EINPROGRESS; |
680 |
acb->buf = NULL;
|
681 |
acb->ioh = buf; |
682 |
|
683 |
acb->task = malloc(sizeof(struct scsi_task)); |
684 |
if (acb->task == NULL) { |
685 |
error_report("iSCSI: Failed to allocate task for scsi command. %s",
|
686 |
iscsi_get_error(iscsi)); |
687 |
qemu_aio_release(acb); |
688 |
return NULL; |
689 |
} |
690 |
memset(acb->task, 0, sizeof(struct scsi_task)); |
691 |
|
692 |
switch (acb->ioh->dxfer_direction) {
|
693 |
case SG_DXFER_TO_DEV:
|
694 |
acb->task->xfer_dir = SCSI_XFER_WRITE; |
695 |
break;
|
696 |
case SG_DXFER_FROM_DEV:
|
697 |
acb->task->xfer_dir = SCSI_XFER_READ; |
698 |
break;
|
699 |
default:
|
700 |
acb->task->xfer_dir = SCSI_XFER_NONE; |
701 |
break;
|
702 |
} |
703 |
|
704 |
acb->task->cdb_size = acb->ioh->cmd_len; |
705 |
memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len);
|
706 |
acb->task->expxferlen = acb->ioh->dxfer_len; |
707 |
|
708 |
data.size = 0;
|
709 |
if (acb->task->xfer_dir == SCSI_XFER_WRITE) {
|
710 |
if (acb->ioh->iovec_count == 0) { |
711 |
data.data = acb->ioh->dxferp; |
712 |
data.size = acb->ioh->dxfer_len; |
713 |
} else {
|
714 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
715 |
scsi_task_set_iov_out(acb->task, |
716 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
717 |
acb->ioh->iovec_count); |
718 |
#else
|
719 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
720 |
|
721 |
acb->buf = g_malloc(acb->ioh->dxfer_len); |
722 |
data.data = acb->buf; |
723 |
data.size = iov_to_buf(iov, acb->ioh->iovec_count, 0,
|
724 |
acb->buf, acb->ioh->dxfer_len); |
725 |
#endif
|
726 |
} |
727 |
} |
728 |
|
729 |
if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task,
|
730 |
iscsi_aio_ioctl_cb, |
731 |
(data.size > 0) ? &data : NULL, |
732 |
acb) != 0) {
|
733 |
scsi_free_scsi_task(acb->task); |
734 |
qemu_aio_release(acb); |
735 |
return NULL; |
736 |
} |
737 |
|
738 |
/* tell libiscsi to read straight into the buffer we got from ioctl */
|
739 |
if (acb->task->xfer_dir == SCSI_XFER_READ) {
|
740 |
if (acb->ioh->iovec_count == 0) { |
741 |
scsi_task_add_data_in_buffer(acb->task, |
742 |
acb->ioh->dxfer_len, |
743 |
acb->ioh->dxferp); |
744 |
} else {
|
745 |
#if defined(LIBISCSI_FEATURE_IOVECTOR)
|
746 |
scsi_task_set_iov_in(acb->task, |
747 |
(struct scsi_iovec *) acb->ioh->dxferp,
|
748 |
acb->ioh->iovec_count); |
749 |
#else
|
750 |
int i;
|
751 |
for (i = 0; i < acb->ioh->iovec_count; i++) { |
752 |
struct iovec *iov = (struct iovec *)acb->ioh->dxferp; |
753 |
|
754 |
scsi_task_add_data_in_buffer(acb->task, |
755 |
iov[i].iov_len, |
756 |
iov[i].iov_base); |
757 |
} |
758 |
#endif
|
759 |
} |
760 |
} |
761 |
|
762 |
iscsi_set_events(iscsilun); |
763 |
|
764 |
return &acb->common;
|
765 |
} |
766 |
|
767 |
|
768 |
static void ioctl_cb(void *opaque, int status) |
769 |
{ |
770 |
int *p_status = opaque;
|
771 |
*p_status = status; |
772 |
} |
773 |
|
774 |
static int iscsi_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
775 |
{ |
776 |
IscsiLun *iscsilun = bs->opaque; |
777 |
int status;
|
778 |
|
779 |
switch (req) {
|
780 |
case SG_GET_VERSION_NUM:
|
781 |
*(int *)buf = 30000; |
782 |
break;
|
783 |
case SG_GET_SCSI_ID:
|
784 |
((struct sg_scsi_id *)buf)->scsi_type = iscsilun->type;
|
785 |
break;
|
786 |
case SG_IO:
|
787 |
status = -EINPROGRESS; |
788 |
iscsi_aio_ioctl(bs, req, buf, ioctl_cb, &status); |
789 |
|
790 |
while (status == -EINPROGRESS) {
|
791 |
qemu_aio_wait(); |
792 |
} |
793 |
|
794 |
return 0; |
795 |
default:
|
796 |
return -1; |
797 |
} |
798 |
return 0; |
799 |
} |
800 |
#endif
|
801 |
|
802 |
static int64_t
|
803 |
iscsi_getlength(BlockDriverState *bs) |
804 |
{ |
805 |
IscsiLun *iscsilun = bs->opaque; |
806 |
int64_t len; |
807 |
|
808 |
len = iscsilun->num_blocks; |
809 |
len *= iscsilun->block_size; |
810 |
|
811 |
return len;
|
812 |
} |
813 |
|
814 |
static int64_t coroutine_fn iscsi_co_get_block_status(BlockDriverState *bs,
|
815 |
int64_t sector_num, |
816 |
int nb_sectors, int *pnum) |
817 |
{ |
818 |
IscsiLun *iscsilun = bs->opaque; |
819 |
struct scsi_get_lba_status *lbas = NULL; |
820 |
struct scsi_lba_status_descriptor *lbasd = NULL; |
821 |
struct IscsiTask iTask;
|
822 |
int64_t ret; |
823 |
|
824 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
825 |
|
826 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
827 |
ret = -EINVAL; |
828 |
goto out;
|
829 |
} |
830 |
|
831 |
/* default to all sectors allocated */
|
832 |
ret = BDRV_BLOCK_DATA; |
833 |
ret |= (sector_num << BDRV_SECTOR_BITS) | BDRV_BLOCK_OFFSET_VALID; |
834 |
*pnum = nb_sectors; |
835 |
|
836 |
/* LUN does not support logical block provisioning */
|
837 |
if (iscsilun->lbpme == 0) { |
838 |
goto out;
|
839 |
} |
840 |
|
841 |
retry:
|
842 |
if (iscsi_get_lba_status_task(iscsilun->iscsi, iscsilun->lun,
|
843 |
sector_qemu2lun(sector_num, iscsilun), |
844 |
8 + 16, iscsi_co_generic_cb, |
845 |
&iTask) == NULL) {
|
846 |
ret = -EIO; |
847 |
goto out;
|
848 |
} |
849 |
|
850 |
while (!iTask.complete) {
|
851 |
iscsi_set_events(iscsilun); |
852 |
qemu_coroutine_yield(); |
853 |
} |
854 |
|
855 |
if (iTask.do_retry) {
|
856 |
if (iTask.task != NULL) { |
857 |
scsi_free_scsi_task(iTask.task); |
858 |
iTask.task = NULL;
|
859 |
} |
860 |
goto retry;
|
861 |
} |
862 |
|
863 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
864 |
/* in case the get_lba_status_callout fails (i.e.
|
865 |
* because the device is busy or the cmd is not
|
866 |
* supported) we pretend all blocks are allocated
|
867 |
* for backwards compatiblity */
|
868 |
goto out;
|
869 |
} |
870 |
|
871 |
lbas = scsi_datain_unmarshall(iTask.task); |
872 |
if (lbas == NULL) { |
873 |
ret = -EIO; |
874 |
goto out;
|
875 |
} |
876 |
|
877 |
lbasd = &lbas->descriptors[0];
|
878 |
|
879 |
if (sector_qemu2lun(sector_num, iscsilun) != lbasd->lba) {
|
880 |
ret = -EIO; |
881 |
goto out;
|
882 |
} |
883 |
|
884 |
*pnum = sector_lun2qemu(lbasd->num_blocks, iscsilun); |
885 |
if (*pnum > nb_sectors) {
|
886 |
*pnum = nb_sectors; |
887 |
} |
888 |
|
889 |
if (lbasd->provisioning == SCSI_PROVISIONING_TYPE_DEALLOCATED ||
|
890 |
lbasd->provisioning == SCSI_PROVISIONING_TYPE_ANCHORED) { |
891 |
ret &= ~BDRV_BLOCK_DATA; |
892 |
if (iscsilun->lbprz) {
|
893 |
ret |= BDRV_BLOCK_ZERO; |
894 |
} |
895 |
} |
896 |
|
897 |
out:
|
898 |
if (iTask.task != NULL) { |
899 |
scsi_free_scsi_task(iTask.task); |
900 |
} |
901 |
return ret;
|
902 |
} |
903 |
|
904 |
static int |
905 |
coroutine_fn iscsi_co_discard(BlockDriverState *bs, int64_t sector_num, |
906 |
int nb_sectors)
|
907 |
{ |
908 |
IscsiLun *iscsilun = bs->opaque; |
909 |
struct IscsiTask iTask;
|
910 |
struct unmap_list list;
|
911 |
uint32_t nb_blocks; |
912 |
uint32_t max_unmap; |
913 |
|
914 |
if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) {
|
915 |
return -EINVAL;
|
916 |
} |
917 |
|
918 |
if (!iscsilun->lbp.lbpu) {
|
919 |
/* UNMAP is not supported by the target */
|
920 |
return 0; |
921 |
} |
922 |
|
923 |
list.lba = sector_qemu2lun(sector_num, iscsilun); |
924 |
nb_blocks = sector_qemu2lun(nb_sectors, iscsilun); |
925 |
|
926 |
max_unmap = iscsilun->bl.max_unmap; |
927 |
if (max_unmap == 0xffffffff) { |
928 |
max_unmap = ISCSI_MAX_UNMAP; |
929 |
} |
930 |
|
931 |
while (nb_blocks > 0) { |
932 |
iscsi_co_init_iscsitask(iscsilun, &iTask); |
933 |
list.num = nb_blocks; |
934 |
if (list.num > max_unmap) {
|
935 |
list.num = max_unmap; |
936 |
} |
937 |
retry:
|
938 |
if (iscsi_unmap_task(iscsilun->iscsi, iscsilun->lun, 0, 0, &list, 1, |
939 |
iscsi_co_generic_cb, &iTask) == NULL) {
|
940 |
return -EIO;
|
941 |
} |
942 |
|
943 |
while (!iTask.complete) {
|
944 |
iscsi_set_events(iscsilun); |
945 |
qemu_coroutine_yield(); |
946 |
} |
947 |
|
948 |
if (iTask.task != NULL) { |
949 |
scsi_free_scsi_task(iTask.task); |
950 |
iTask.task = NULL;
|
951 |
} |
952 |
|
953 |
if (iTask.do_retry) {
|
954 |
goto retry;
|
955 |
} |
956 |
|
957 |
if (iTask.status == SCSI_STATUS_CHECK_CONDITION) {
|
958 |
/* the target might fail with a check condition if it
|
959 |
is not happy with the alignment of the UNMAP request
|
960 |
we silently fail in this case */
|
961 |
return 0; |
962 |
} |
963 |
|
964 |
if (iTask.status != SCSI_STATUS_GOOD) {
|
965 |
return -EIO;
|
966 |
} |
967 |
|
968 |
list.lba += list.num; |
969 |
nb_blocks -= list.num; |
970 |
} |
971 |
|
972 |
return 0; |
973 |
} |
974 |
|
975 |
static int parse_chap(struct iscsi_context *iscsi, const char *target) |
976 |
{ |
977 |
QemuOptsList *list; |
978 |
QemuOpts *opts; |
979 |
const char *user = NULL; |
980 |
const char *password = NULL; |
981 |
|
982 |
list = qemu_find_opts("iscsi");
|
983 |
if (!list) {
|
984 |
return 0; |
985 |
} |
986 |
|
987 |
opts = qemu_opts_find(list, target); |
988 |
if (opts == NULL) { |
989 |
opts = QTAILQ_FIRST(&list->head); |
990 |
if (!opts) {
|
991 |
return 0; |
992 |
} |
993 |
} |
994 |
|
995 |
user = qemu_opt_get(opts, "user");
|
996 |
if (!user) {
|
997 |
return 0; |
998 |
} |
999 |
|
1000 |
password = qemu_opt_get(opts, "password");
|
1001 |
if (!password) {
|
1002 |
error_report("CHAP username specified but no password was given");
|
1003 |
return -1; |
1004 |
} |
1005 |
|
1006 |
if (iscsi_set_initiator_username_pwd(iscsi, user, password)) {
|
1007 |
error_report("Failed to set initiator username and password");
|
1008 |
return -1; |
1009 |
} |
1010 |
|
1011 |
return 0; |
1012 |
} |
1013 |
|
1014 |
static void parse_header_digest(struct iscsi_context *iscsi, const char *target) |
1015 |
{ |
1016 |
QemuOptsList *list; |
1017 |
QemuOpts *opts; |
1018 |
const char *digest = NULL; |
1019 |
|
1020 |
list = qemu_find_opts("iscsi");
|
1021 |
if (!list) {
|
1022 |
return;
|
1023 |
} |
1024 |
|
1025 |
opts = qemu_opts_find(list, target); |
1026 |
if (opts == NULL) { |
1027 |
opts = QTAILQ_FIRST(&list->head); |
1028 |
if (!opts) {
|
1029 |
return;
|
1030 |
} |
1031 |
} |
1032 |
|
1033 |
digest = qemu_opt_get(opts, "header-digest");
|
1034 |
if (!digest) {
|
1035 |
return;
|
1036 |
} |
1037 |
|
1038 |
if (!strcmp(digest, "CRC32C")) { |
1039 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C); |
1040 |
} else if (!strcmp(digest, "NONE")) { |
1041 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE); |
1042 |
} else if (!strcmp(digest, "CRC32C-NONE")) { |
1043 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_CRC32C_NONE); |
1044 |
} else if (!strcmp(digest, "NONE-CRC32C")) { |
1045 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
1046 |
} else {
|
1047 |
error_report("Invalid header-digest setting : %s", digest);
|
1048 |
} |
1049 |
} |
1050 |
|
1051 |
static char *parse_initiator_name(const char *target) |
1052 |
{ |
1053 |
QemuOptsList *list; |
1054 |
QemuOpts *opts; |
1055 |
const char *name; |
1056 |
char *iscsi_name;
|
1057 |
UuidInfo *uuid_info; |
1058 |
|
1059 |
list = qemu_find_opts("iscsi");
|
1060 |
if (list) {
|
1061 |
opts = qemu_opts_find(list, target); |
1062 |
if (!opts) {
|
1063 |
opts = QTAILQ_FIRST(&list->head); |
1064 |
} |
1065 |
if (opts) {
|
1066 |
name = qemu_opt_get(opts, "initiator-name");
|
1067 |
if (name) {
|
1068 |
return g_strdup(name);
|
1069 |
} |
1070 |
} |
1071 |
} |
1072 |
|
1073 |
uuid_info = qmp_query_uuid(NULL);
|
1074 |
if (strcmp(uuid_info->UUID, UUID_NONE) == 0) { |
1075 |
name = qemu_get_vm_name(); |
1076 |
} else {
|
1077 |
name = uuid_info->UUID; |
1078 |
} |
1079 |
iscsi_name = g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
|
1080 |
name ? ":" : "", name ? name : ""); |
1081 |
qapi_free_UuidInfo(uuid_info); |
1082 |
return iscsi_name;
|
1083 |
} |
1084 |
|
1085 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
1086 |
static void iscsi_nop_timed_event(void *opaque) |
1087 |
{ |
1088 |
IscsiLun *iscsilun = opaque; |
1089 |
|
1090 |
if (iscsi_get_nops_in_flight(iscsilun->iscsi) > MAX_NOP_FAILURES) {
|
1091 |
error_report("iSCSI: NOP timeout. Reconnecting...");
|
1092 |
iscsi_reconnect(iscsilun->iscsi); |
1093 |
} |
1094 |
|
1095 |
if (iscsi_nop_out_async(iscsilun->iscsi, NULL, NULL, 0, NULL) != 0) { |
1096 |
error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
|
1097 |
return;
|
1098 |
} |
1099 |
|
1100 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
1101 |
iscsi_set_events(iscsilun); |
1102 |
} |
1103 |
#endif
|
1104 |
|
1105 |
static int iscsi_readcapacity_sync(IscsiLun *iscsilun) |
1106 |
{ |
1107 |
struct scsi_task *task = NULL; |
1108 |
struct scsi_readcapacity10 *rc10 = NULL; |
1109 |
struct scsi_readcapacity16 *rc16 = NULL; |
1110 |
int ret = 0; |
1111 |
int retries = ISCSI_CMD_RETRIES;
|
1112 |
|
1113 |
do {
|
1114 |
if (task != NULL) { |
1115 |
scsi_free_scsi_task(task); |
1116 |
task = NULL;
|
1117 |
} |
1118 |
|
1119 |
switch (iscsilun->type) {
|
1120 |
case TYPE_DISK:
|
1121 |
task = iscsi_readcapacity16_sync(iscsilun->iscsi, iscsilun->lun); |
1122 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
1123 |
rc16 = scsi_datain_unmarshall(task); |
1124 |
if (rc16 == NULL) { |
1125 |
error_report("iSCSI: Failed to unmarshall readcapacity16 data.");
|
1126 |
ret = -EINVAL; |
1127 |
} else {
|
1128 |
iscsilun->block_size = rc16->block_length; |
1129 |
iscsilun->num_blocks = rc16->returned_lba + 1;
|
1130 |
iscsilun->lbpme = rc16->lbpme; |
1131 |
iscsilun->lbprz = rc16->lbprz; |
1132 |
} |
1133 |
} |
1134 |
break;
|
1135 |
case TYPE_ROM:
|
1136 |
task = iscsi_readcapacity10_sync(iscsilun->iscsi, iscsilun->lun, 0, 0); |
1137 |
if (task != NULL && task->status == SCSI_STATUS_GOOD) { |
1138 |
rc10 = scsi_datain_unmarshall(task); |
1139 |
if (rc10 == NULL) { |
1140 |
error_report("iSCSI: Failed to unmarshall readcapacity10 data.");
|
1141 |
ret = -EINVAL; |
1142 |
} else {
|
1143 |
iscsilun->block_size = rc10->block_size; |
1144 |
if (rc10->lba == 0) { |
1145 |
/* blank disk loaded */
|
1146 |
iscsilun->num_blocks = 0;
|
1147 |
} else {
|
1148 |
iscsilun->num_blocks = rc10->lba + 1;
|
1149 |
} |
1150 |
} |
1151 |
} |
1152 |
break;
|
1153 |
default:
|
1154 |
return 0; |
1155 |
} |
1156 |
} while (task != NULL && task->status == SCSI_STATUS_CHECK_CONDITION |
1157 |
&& task->sense.key == SCSI_SENSE_UNIT_ATTENTION |
1158 |
&& retries-- > 0);
|
1159 |
|
1160 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1161 |
error_report("iSCSI: failed to send readcapacity10 command.");
|
1162 |
ret = -EINVAL; |
1163 |
} |
1164 |
if (task) {
|
1165 |
scsi_free_scsi_task(task); |
1166 |
} |
1167 |
return ret;
|
1168 |
} |
1169 |
|
1170 |
/* TODO Convert to fine grained options */
|
1171 |
static QemuOptsList runtime_opts = {
|
1172 |
.name = "iscsi",
|
1173 |
.head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head), |
1174 |
.desc = { |
1175 |
{ |
1176 |
.name = "filename",
|
1177 |
.type = QEMU_OPT_STRING, |
1178 |
.help = "URL to the iscsi image",
|
1179 |
}, |
1180 |
{ /* end of list */ }
|
1181 |
}, |
1182 |
}; |
1183 |
|
1184 |
static struct scsi_task *iscsi_do_inquiry(struct iscsi_context *iscsi, |
1185 |
int lun, int evpd, int pc) { |
1186 |
int full_size;
|
1187 |
struct scsi_task *task = NULL; |
1188 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, 64);
|
1189 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1190 |
goto fail;
|
1191 |
} |
1192 |
full_size = scsi_datain_getfullsize(task); |
1193 |
if (full_size > task->datain.size) {
|
1194 |
scsi_free_scsi_task(task); |
1195 |
|
1196 |
/* we need more data for the full list */
|
1197 |
task = iscsi_inquiry_sync(iscsi, lun, evpd, pc, full_size); |
1198 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1199 |
goto fail;
|
1200 |
} |
1201 |
} |
1202 |
|
1203 |
return task;
|
1204 |
|
1205 |
fail:
|
1206 |
error_report("iSCSI: Inquiry command failed : %s",
|
1207 |
iscsi_get_error(iscsi)); |
1208 |
if (task) {
|
1209 |
scsi_free_scsi_task(task); |
1210 |
return NULL; |
1211 |
} |
1212 |
return NULL; |
1213 |
} |
1214 |
|
1215 |
/*
|
1216 |
* We support iscsi url's on the form
|
1217 |
* iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
|
1218 |
*/
|
1219 |
static int iscsi_open(BlockDriverState *bs, QDict *options, int flags) |
1220 |
{ |
1221 |
IscsiLun *iscsilun = bs->opaque; |
1222 |
struct iscsi_context *iscsi = NULL; |
1223 |
struct iscsi_url *iscsi_url = NULL; |
1224 |
struct scsi_task *task = NULL; |
1225 |
struct scsi_inquiry_standard *inq = NULL; |
1226 |
char *initiator_name = NULL; |
1227 |
QemuOpts *opts; |
1228 |
Error *local_err = NULL;
|
1229 |
const char *filename; |
1230 |
int ret;
|
1231 |
|
1232 |
if ((BDRV_SECTOR_SIZE % 512) != 0) { |
1233 |
error_report("iSCSI: Invalid BDRV_SECTOR_SIZE. "
|
1234 |
"BDRV_SECTOR_SIZE(%lld) is not a multiple "
|
1235 |
"of 512", BDRV_SECTOR_SIZE);
|
1236 |
return -EINVAL;
|
1237 |
} |
1238 |
|
1239 |
opts = qemu_opts_create_nofail(&runtime_opts); |
1240 |
qemu_opts_absorb_qdict(opts, options, &local_err); |
1241 |
if (error_is_set(&local_err)) {
|
1242 |
qerror_report_err(local_err); |
1243 |
error_free(local_err); |
1244 |
ret = -EINVAL; |
1245 |
goto out;
|
1246 |
} |
1247 |
|
1248 |
filename = qemu_opt_get(opts, "filename");
|
1249 |
|
1250 |
|
1251 |
iscsi_url = iscsi_parse_full_url(iscsi, filename); |
1252 |
if (iscsi_url == NULL) { |
1253 |
error_report("Failed to parse URL : %s", filename);
|
1254 |
ret = -EINVAL; |
1255 |
goto out;
|
1256 |
} |
1257 |
|
1258 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1259 |
|
1260 |
initiator_name = parse_initiator_name(iscsi_url->target); |
1261 |
|
1262 |
iscsi = iscsi_create_context(initiator_name); |
1263 |
if (iscsi == NULL) { |
1264 |
error_report("iSCSI: Failed to create iSCSI context.");
|
1265 |
ret = -ENOMEM; |
1266 |
goto out;
|
1267 |
} |
1268 |
|
1269 |
if (iscsi_set_targetname(iscsi, iscsi_url->target)) {
|
1270 |
error_report("iSCSI: Failed to set target name.");
|
1271 |
ret = -EINVAL; |
1272 |
goto out;
|
1273 |
} |
1274 |
|
1275 |
if (iscsi_url->user != NULL) { |
1276 |
ret = iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, |
1277 |
iscsi_url->passwd); |
1278 |
if (ret != 0) { |
1279 |
error_report("Failed to set initiator username and password");
|
1280 |
ret = -EINVAL; |
1281 |
goto out;
|
1282 |
} |
1283 |
} |
1284 |
|
1285 |
/* check if we got CHAP username/password via the options */
|
1286 |
if (parse_chap(iscsi, iscsi_url->target) != 0) { |
1287 |
error_report("iSCSI: Failed to set CHAP user/password");
|
1288 |
ret = -EINVAL; |
1289 |
goto out;
|
1290 |
} |
1291 |
|
1292 |
if (iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL) != 0) { |
1293 |
error_report("iSCSI: Failed to set session type to normal.");
|
1294 |
ret = -EINVAL; |
1295 |
goto out;
|
1296 |
} |
1297 |
|
1298 |
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C); |
1299 |
|
1300 |
/* check if we got HEADER_DIGEST via the options */
|
1301 |
parse_header_digest(iscsi, iscsi_url->target); |
1302 |
|
1303 |
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) { |
1304 |
error_report("iSCSI: Failed to connect to LUN : %s",
|
1305 |
iscsi_get_error(iscsi)); |
1306 |
ret = -EINVAL; |
1307 |
goto out;
|
1308 |
} |
1309 |
|
1310 |
iscsilun->iscsi = iscsi; |
1311 |
iscsilun->lun = iscsi_url->lun; |
1312 |
|
1313 |
task = iscsi_inquiry_sync(iscsi, iscsilun->lun, 0, 0, 36); |
1314 |
|
1315 |
if (task == NULL || task->status != SCSI_STATUS_GOOD) { |
1316 |
error_report("iSCSI: failed to send inquiry command.");
|
1317 |
ret = -EINVAL; |
1318 |
goto out;
|
1319 |
} |
1320 |
|
1321 |
inq = scsi_datain_unmarshall(task); |
1322 |
if (inq == NULL) { |
1323 |
error_report("iSCSI: Failed to unmarshall inquiry data.");
|
1324 |
ret = -EINVAL; |
1325 |
goto out;
|
1326 |
} |
1327 |
|
1328 |
iscsilun->type = inq->periperal_device_type; |
1329 |
|
1330 |
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1331 |
goto out;
|
1332 |
} |
1333 |
bs->total_sectors = sector_lun2qemu(iscsilun->num_blocks, iscsilun); |
1334 |
|
1335 |
/* Medium changer or tape. We dont have any emulation for this so this must
|
1336 |
* be sg ioctl compatible. We force it to be sg, otherwise qemu will try
|
1337 |
* to read from the device to guess the image format.
|
1338 |
*/
|
1339 |
if (iscsilun->type == TYPE_MEDIUM_CHANGER ||
|
1340 |
iscsilun->type == TYPE_TAPE) { |
1341 |
bs->sg = 1;
|
1342 |
} |
1343 |
|
1344 |
if (iscsilun->lbpme) {
|
1345 |
struct scsi_inquiry_logical_block_provisioning *inq_lbp;
|
1346 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
1347 |
SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING); |
1348 |
if (task == NULL) { |
1349 |
ret = -EINVAL; |
1350 |
goto out;
|
1351 |
} |
1352 |
inq_lbp = scsi_datain_unmarshall(task); |
1353 |
if (inq_lbp == NULL) { |
1354 |
error_report("iSCSI: failed to unmarshall inquiry datain blob");
|
1355 |
ret = -EINVAL; |
1356 |
goto out;
|
1357 |
} |
1358 |
memcpy(&iscsilun->lbp, inq_lbp, |
1359 |
sizeof(struct scsi_inquiry_logical_block_provisioning)); |
1360 |
scsi_free_scsi_task(task); |
1361 |
task = NULL;
|
1362 |
} |
1363 |
|
1364 |
if (iscsilun->lbp.lbpu || iscsilun->lbp.lbpws) {
|
1365 |
struct scsi_inquiry_block_limits *inq_bl;
|
1366 |
task = iscsi_do_inquiry(iscsilun->iscsi, iscsilun->lun, 1,
|
1367 |
SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS); |
1368 |
if (task == NULL) { |
1369 |
ret = -EINVAL; |
1370 |
goto out;
|
1371 |
} |
1372 |
inq_bl = scsi_datain_unmarshall(task); |
1373 |
if (inq_bl == NULL) { |
1374 |
error_report("iSCSI: failed to unmarshall inquiry datain blob");
|
1375 |
ret = -EINVAL; |
1376 |
goto out;
|
1377 |
} |
1378 |
memcpy(&iscsilun->bl, inq_bl, |
1379 |
sizeof(struct scsi_inquiry_block_limits)); |
1380 |
scsi_free_scsi_task(task); |
1381 |
task = NULL;
|
1382 |
} |
1383 |
|
1384 |
#if defined(LIBISCSI_FEATURE_NOP_COUNTER)
|
1385 |
/* Set up a timer for sending out iSCSI NOPs */
|
1386 |
iscsilun->nop_timer = timer_new_ms(QEMU_CLOCK_REALTIME, iscsi_nop_timed_event, iscsilun); |
1387 |
timer_mod(iscsilun->nop_timer, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + NOP_INTERVAL); |
1388 |
#endif
|
1389 |
|
1390 |
out:
|
1391 |
qemu_opts_del(opts); |
1392 |
if (initiator_name != NULL) { |
1393 |
g_free(initiator_name); |
1394 |
} |
1395 |
if (iscsi_url != NULL) { |
1396 |
iscsi_destroy_url(iscsi_url); |
1397 |
} |
1398 |
if (task != NULL) { |
1399 |
scsi_free_scsi_task(task); |
1400 |
} |
1401 |
|
1402 |
if (ret) {
|
1403 |
if (iscsi != NULL) { |
1404 |
iscsi_destroy_context(iscsi); |
1405 |
} |
1406 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1407 |
} |
1408 |
return ret;
|
1409 |
} |
1410 |
|
1411 |
static void iscsi_close(BlockDriverState *bs) |
1412 |
{ |
1413 |
IscsiLun *iscsilun = bs->opaque; |
1414 |
struct iscsi_context *iscsi = iscsilun->iscsi;
|
1415 |
|
1416 |
if (iscsilun->nop_timer) {
|
1417 |
timer_del(iscsilun->nop_timer); |
1418 |
timer_free(iscsilun->nop_timer); |
1419 |
} |
1420 |
qemu_aio_set_fd_handler(iscsi_get_fd(iscsi), NULL, NULL, NULL); |
1421 |
iscsi_destroy_context(iscsi); |
1422 |
memset(iscsilun, 0, sizeof(IscsiLun)); |
1423 |
} |
1424 |
|
1425 |
static int iscsi_truncate(BlockDriverState *bs, int64_t offset) |
1426 |
{ |
1427 |
IscsiLun *iscsilun = bs->opaque; |
1428 |
int ret = 0; |
1429 |
|
1430 |
if (iscsilun->type != TYPE_DISK) {
|
1431 |
return -ENOTSUP;
|
1432 |
} |
1433 |
|
1434 |
if ((ret = iscsi_readcapacity_sync(iscsilun)) != 0) { |
1435 |
return ret;
|
1436 |
} |
1437 |
|
1438 |
if (offset > iscsi_getlength(bs)) {
|
1439 |
return -EINVAL;
|
1440 |
} |
1441 |
|
1442 |
return 0; |
1443 |
} |
1444 |
|
1445 |
static int iscsi_has_zero_init(BlockDriverState *bs) |
1446 |
{ |
1447 |
return 0; |
1448 |
} |
1449 |
|
1450 |
static int iscsi_create(const char *filename, QEMUOptionParameter *options) |
1451 |
{ |
1452 |
int ret = 0; |
1453 |
int64_t total_size = 0;
|
1454 |
BlockDriverState *bs; |
1455 |
IscsiLun *iscsilun = NULL;
|
1456 |
QDict *bs_options; |
1457 |
|
1458 |
bs = bdrv_new("");
|
1459 |
|
1460 |
/* Read out options */
|
1461 |
while (options && options->name) {
|
1462 |
if (!strcmp(options->name, "size")) { |
1463 |
total_size = options->value.n / BDRV_SECTOR_SIZE; |
1464 |
} |
1465 |
options++; |
1466 |
} |
1467 |
|
1468 |
bs->opaque = g_malloc0(sizeof(struct IscsiLun)); |
1469 |
iscsilun = bs->opaque; |
1470 |
|
1471 |
bs_options = qdict_new(); |
1472 |
qdict_put(bs_options, "filename", qstring_from_str(filename));
|
1473 |
ret = iscsi_open(bs, bs_options, 0);
|
1474 |
QDECREF(bs_options); |
1475 |
|
1476 |
if (ret != 0) { |
1477 |
goto out;
|
1478 |
} |
1479 |
if (iscsilun->nop_timer) {
|
1480 |
timer_del(iscsilun->nop_timer); |
1481 |
timer_free(iscsilun->nop_timer); |
1482 |
} |
1483 |
if (iscsilun->type != TYPE_DISK) {
|
1484 |
ret = -ENODEV; |
1485 |
goto out;
|
1486 |
} |
1487 |
if (bs->total_sectors < total_size) {
|
1488 |
ret = -ENOSPC; |
1489 |
goto out;
|
1490 |
} |
1491 |
|
1492 |
ret = 0;
|
1493 |
out:
|
1494 |
if (iscsilun->iscsi != NULL) { |
1495 |
iscsi_destroy_context(iscsilun->iscsi); |
1496 |
} |
1497 |
g_free(bs->opaque); |
1498 |
bs->opaque = NULL;
|
1499 |
bdrv_unref(bs); |
1500 |
return ret;
|
1501 |
} |
1502 |
|
1503 |
static QEMUOptionParameter iscsi_create_options[] = {
|
1504 |
{ |
1505 |
.name = BLOCK_OPT_SIZE, |
1506 |
.type = OPT_SIZE, |
1507 |
.help = "Virtual disk size"
|
1508 |
}, |
1509 |
{ NULL }
|
1510 |
}; |
1511 |
|
1512 |
static BlockDriver bdrv_iscsi = {
|
1513 |
.format_name = "iscsi",
|
1514 |
.protocol_name = "iscsi",
|
1515 |
|
1516 |
.instance_size = sizeof(IscsiLun),
|
1517 |
.bdrv_file_open = iscsi_open, |
1518 |
.bdrv_close = iscsi_close, |
1519 |
.bdrv_create = iscsi_create, |
1520 |
.create_options = iscsi_create_options, |
1521 |
|
1522 |
.bdrv_getlength = iscsi_getlength, |
1523 |
.bdrv_truncate = iscsi_truncate, |
1524 |
|
1525 |
.bdrv_co_get_block_status = iscsi_co_get_block_status, |
1526 |
.bdrv_co_discard = iscsi_co_discard, |
1527 |
|
1528 |
.bdrv_aio_readv = iscsi_aio_readv, |
1529 |
.bdrv_aio_writev = iscsi_aio_writev, |
1530 |
.bdrv_aio_flush = iscsi_aio_flush, |
1531 |
|
1532 |
.bdrv_has_zero_init = iscsi_has_zero_init, |
1533 |
|
1534 |
#ifdef __linux__
|
1535 |
.bdrv_ioctl = iscsi_ioctl, |
1536 |
.bdrv_aio_ioctl = iscsi_aio_ioctl, |
1537 |
#endif
|
1538 |
}; |
1539 |
|
1540 |
static QemuOptsList qemu_iscsi_opts = {
|
1541 |
.name = "iscsi",
|
1542 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head), |
1543 |
.desc = { |
1544 |
{ |
1545 |
.name = "user",
|
1546 |
.type = QEMU_OPT_STRING, |
1547 |
.help = "username for CHAP authentication to target",
|
1548 |
},{ |
1549 |
.name = "password",
|
1550 |
.type = QEMU_OPT_STRING, |
1551 |
.help = "password for CHAP authentication to target",
|
1552 |
},{ |
1553 |
.name = "header-digest",
|
1554 |
.type = QEMU_OPT_STRING, |
1555 |
.help = "HeaderDigest setting. "
|
1556 |
"{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
|
1557 |
},{ |
1558 |
.name = "initiator-name",
|
1559 |
.type = QEMU_OPT_STRING, |
1560 |
.help = "Initiator iqn name to use when connecting",
|
1561 |
}, |
1562 |
{ /* end of list */ }
|
1563 |
}, |
1564 |
}; |
1565 |
|
1566 |
static void iscsi_block_init(void) |
1567 |
{ |
1568 |
bdrv_register(&bdrv_iscsi); |
1569 |
qemu_add_opts(&qemu_iscsi_opts); |
1570 |
} |
1571 |
|
1572 |
block_init(iscsi_block_init); |