2 * QEMU Block driver for iSCSI images
4 * Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
5 * Copyright (c) 2012-2016 Peter Lieven <pl@kamp.de>
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "qemu/osdep.h"
30 #include <arpa/inet.h>
31 #include "qemu-common.h"
32 #include "qemu/config-file.h"
33 #include "qemu/error-report.h"
34 #include "qemu/bitops.h"
35 #include "qemu/bitmap.h"
36 #include "block/block_int.h"
37 #include "block/scsi.h"
39 #include "qemu/uuid.h"
40 #include "qmp-commands.h"
41 #include "qapi/qmp/qstring.h"
42 #include "crypto/secret.h"
44 #include <iscsi/iscsi.h>
45 #include <iscsi/scsi-lowlevel.h>
51 typedef struct IscsiLun
{
52 struct iscsi_context
*iscsi
;
53 AioContext
*aio_context
;
55 enum scsi_inquiry_peripheral_device_type type
;
60 QEMUTimer
*event_timer
;
62 struct scsi_inquiry_logical_block_provisioning lbp
;
63 struct scsi_inquiry_block_limits bl
;
64 unsigned char *zeroblock
;
65 /* The allocmap tracks which clusters (pages) on the iSCSI target are
66 * allocated and which are not. In case a target returns zeros for
67 * unallocated pages (iscsilun->lprz) we can directly return zeros instead
68 * of reading zeros over the wire if a read request falls within an
69 * unallocated block. As there are 3 possible states we need 2 bitmaps to
70 * track. allocmap_valid keeps track if QEMU's information about a page is
71 * valid. allocmap tracks if a page is allocated or not. In case QEMU has no
72 * valid information about a page the corresponding allocmap entry should be
73 * switched to unallocated as well to force a new lookup of the allocation
74 * status as lookups are generally skipped if a page is suspect to be
75 * allocated. If a iSCSI target is opened with cache.direct = on the
76 * allocmap_valid does not exist turning all cached information invalid so
77 * that a fresh lookup is made for any page even if allocmap entry returns
78 * it's unallocated. */
79 unsigned long *allocmap
;
80 unsigned long *allocmap_valid
;
89 bool request_timed_out
;
92 typedef struct IscsiTask
{
97 struct scsi_task
*task
;
100 QEMUTimer retry_timer
;
104 typedef struct IscsiAIOCB
{
108 struct scsi_task
*task
;
119 /* libiscsi uses time_t so its enough to process events every second */
120 #define EVENT_INTERVAL 1000
121 #define NOP_INTERVAL 5000
122 #define MAX_NOP_FAILURES 3
123 #define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times)
124 static const unsigned iscsi_retry_times
[] = {8, 32, 128, 512, 2048, 8192, 32768};
126 /* this threshold is a trade-off knob to choose between
127 * the potential additional overhead of an extra GET_LBA_STATUS request
128 * vs. unnecessarily reading a lot of zero sectors over the wire.
129 * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES
130 * sectors we check the allocation status of the area covered by the
131 * request first if the allocationmap indicates that the area might be
133 #define ISCSI_CHECKALLOC_THRES 64
140 qemu_bh_delete(acb
->bh
);
145 acb
->common
.cb(acb
->common
.opaque
, acb
->status
);
147 if (acb
->task
!= NULL
) {
148 scsi_free_scsi_task(acb
->task
);
156 iscsi_schedule_bh(IscsiAIOCB
*acb
)
161 acb
->bh
= aio_bh_new(acb
->iscsilun
->aio_context
, iscsi_bh_cb
, acb
);
162 qemu_bh_schedule(acb
->bh
);
165 static void iscsi_co_generic_bh_cb(void *opaque
)
167 struct IscsiTask
*iTask
= opaque
;
170 aio_co_wake(iTask
->co
);
173 static void iscsi_retry_timer_expired(void *opaque
)
175 struct IscsiTask
*iTask
= opaque
;
178 aio_co_wake(iTask
->co
);
182 static inline unsigned exp_random(double mean
)
184 return -mean
* log((double)rand() / RAND_MAX
);
187 /* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in
188 * libiscsi 1.10.0, together with other constants we need. Use it as
189 * a hint that we have to define them ourselves if needed, to keep the
190 * minimum required libiscsi version at 1.9.0. We use an ASCQ macro for
191 * the test because SCSI_STATUS_* is an enum.
193 * To guard against future changes where SCSI_SENSE_ASCQ_* also becomes
194 * an enum, check against the LIBISCSI_API_VERSION macro, which was
195 * introduced in 1.11.0. If it is present, there is no need to define
198 #if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \
199 !defined(LIBISCSI_API_VERSION)
200 #define SCSI_STATUS_TASK_SET_FULL 0x28
201 #define SCSI_STATUS_TIMEOUT 0x0f000002
202 #define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600
203 #define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00
206 #ifndef LIBISCSI_API_VERSION
207 #define LIBISCSI_API_VERSION 20130701
210 static int iscsi_translate_sense(struct scsi_sense
*sense
)
214 switch (sense
->key
) {
215 case SCSI_SENSE_NOT_READY
:
217 case SCSI_SENSE_DATA_PROTECTION
:
219 case SCSI_SENSE_COMMAND_ABORTED
:
221 case SCSI_SENSE_ILLEGAL_REQUEST
:
227 switch (sense
->ascq
) {
228 case SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR
:
229 case SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE
:
230 case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB
:
231 case SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST
:
234 case SCSI_SENSE_ASCQ_LBA_OUT_OF_RANGE
:
237 case SCSI_SENSE_ASCQ_LOGICAL_UNIT_NOT_SUPPORTED
:
240 case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT
:
241 case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_CLOSED
:
242 case SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT_TRAY_OPEN
:
245 case SCSI_SENSE_ASCQ_WRITE_PROTECTED
:
255 /* Called (via iscsi_service) with QemuMutex held. */
257 iscsi_co_generic_cb(struct iscsi_context
*iscsi
, int status
,
258 void *command_data
, void *opaque
)
260 struct IscsiTask
*iTask
= opaque
;
261 struct scsi_task
*task
= command_data
;
263 iTask
->status
= status
;
267 if (status
!= SCSI_STATUS_GOOD
) {
268 if (iTask
->retries
++ < ISCSI_CMD_RETRIES
) {
269 if (status
== SCSI_STATUS_CHECK_CONDITION
270 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
) {
271 error_report("iSCSI CheckCondition: %s",
272 iscsi_get_error(iscsi
));
276 if (status
== SCSI_STATUS_BUSY
||
277 status
== SCSI_STATUS_TIMEOUT
||
278 status
== SCSI_STATUS_TASK_SET_FULL
) {
279 unsigned retry_time
=
280 exp_random(iscsi_retry_times
[iTask
->retries
- 1]);
281 if (status
== SCSI_STATUS_TIMEOUT
) {
282 /* make sure the request is rescheduled AFTER the
283 * reconnect is initiated */
284 retry_time
= EVENT_INTERVAL
* 2;
285 iTask
->iscsilun
->request_timed_out
= true;
287 error_report("iSCSI Busy/TaskSetFull/TimeOut"
288 " (retry #%u in %u ms): %s",
289 iTask
->retries
, retry_time
,
290 iscsi_get_error(iscsi
));
291 aio_timer_init(iTask
->iscsilun
->aio_context
,
292 &iTask
->retry_timer
, QEMU_CLOCK_REALTIME
,
293 SCALE_MS
, iscsi_retry_timer_expired
, iTask
);
294 timer_mod(&iTask
->retry_timer
,
295 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + retry_time
);
300 iTask
->err_code
= iscsi_translate_sense(&task
->sense
);
301 error_report("iSCSI Failure: %s", iscsi_get_error(iscsi
));
306 aio_bh_schedule_oneshot(iTask
->iscsilun
->aio_context
,
307 iscsi_co_generic_bh_cb
, iTask
);
313 static void iscsi_co_init_iscsitask(IscsiLun
*iscsilun
, struct IscsiTask
*iTask
)
315 *iTask
= (struct IscsiTask
) {
316 .co
= qemu_coroutine_self(),
317 .iscsilun
= iscsilun
,
322 iscsi_abort_task_cb(struct iscsi_context
*iscsi
, int status
, void *command_data
,
325 IscsiAIOCB
*acb
= private_data
;
327 acb
->status
= -ECANCELED
;
328 iscsi_schedule_bh(acb
);
332 iscsi_aio_cancel(BlockAIOCB
*blockacb
)
334 IscsiAIOCB
*acb
= (IscsiAIOCB
*)blockacb
;
335 IscsiLun
*iscsilun
= acb
->iscsilun
;
337 if (acb
->status
!= -EINPROGRESS
) {
341 /* send a task mgmt call to the target to cancel the task on the target */
342 iscsi_task_mgmt_abort_task_async(iscsilun
->iscsi
, acb
->task
,
343 iscsi_abort_task_cb
, acb
);
347 static const AIOCBInfo iscsi_aiocb_info
= {
348 .aiocb_size
= sizeof(IscsiAIOCB
),
349 .cancel_async
= iscsi_aio_cancel
,
353 static void iscsi_process_read(void *arg
);
354 static void iscsi_process_write(void *arg
);
356 /* Called with QemuMutex held. */
358 iscsi_set_events(IscsiLun
*iscsilun
)
360 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
361 int ev
= iscsi_which_events(iscsi
);
363 if (ev
!= iscsilun
->events
) {
364 aio_set_fd_handler(iscsilun
->aio_context
, iscsi_get_fd(iscsi
),
366 (ev
& POLLIN
) ? iscsi_process_read
: NULL
,
367 (ev
& POLLOUT
) ? iscsi_process_write
: NULL
,
370 iscsilun
->events
= ev
;
374 static void iscsi_timed_check_events(void *opaque
)
376 IscsiLun
*iscsilun
= opaque
;
378 /* check for timed out requests */
379 iscsi_service(iscsilun
->iscsi
, 0);
381 if (iscsilun
->request_timed_out
) {
382 iscsilun
->request_timed_out
= false;
383 iscsi_reconnect(iscsilun
->iscsi
);
386 /* newer versions of libiscsi may return zero events. Ensure we are able
387 * to return to service once this situation changes. */
388 iscsi_set_events(iscsilun
);
390 timer_mod(iscsilun
->event_timer
,
391 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + EVENT_INTERVAL
);
395 iscsi_process_read(void *arg
)
397 IscsiLun
*iscsilun
= arg
;
398 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
400 qemu_mutex_lock(&iscsilun
->mutex
);
401 iscsi_service(iscsi
, POLLIN
);
402 iscsi_set_events(iscsilun
);
403 qemu_mutex_unlock(&iscsilun
->mutex
);
407 iscsi_process_write(void *arg
)
409 IscsiLun
*iscsilun
= arg
;
410 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
412 qemu_mutex_lock(&iscsilun
->mutex
);
413 iscsi_service(iscsi
, POLLOUT
);
414 iscsi_set_events(iscsilun
);
415 qemu_mutex_unlock(&iscsilun
->mutex
);
418 static int64_t sector_lun2qemu(int64_t sector
, IscsiLun
*iscsilun
)
420 return sector
* iscsilun
->block_size
/ BDRV_SECTOR_SIZE
;
423 static int64_t sector_qemu2lun(int64_t sector
, IscsiLun
*iscsilun
)
425 return sector
* BDRV_SECTOR_SIZE
/ iscsilun
->block_size
;
428 static bool is_byte_request_lun_aligned(int64_t offset
, int count
,
431 if (offset
% iscsilun
->block_size
|| count
% iscsilun
->block_size
) {
432 error_report("iSCSI misaligned request: "
433 "iscsilun->block_size %u, offset %" PRIi64
435 iscsilun
->block_size
, offset
, count
);
441 static bool is_sector_request_lun_aligned(int64_t sector_num
, int nb_sectors
,
444 assert(nb_sectors
<= BDRV_REQUEST_MAX_SECTORS
);
445 return is_byte_request_lun_aligned(sector_num
<< BDRV_SECTOR_BITS
,
446 nb_sectors
<< BDRV_SECTOR_BITS
,
450 static void iscsi_allocmap_free(IscsiLun
*iscsilun
)
452 g_free(iscsilun
->allocmap
);
453 g_free(iscsilun
->allocmap_valid
);
454 iscsilun
->allocmap
= NULL
;
455 iscsilun
->allocmap_valid
= NULL
;
459 static int iscsi_allocmap_init(IscsiLun
*iscsilun
, int open_flags
)
461 iscsi_allocmap_free(iscsilun
);
463 iscsilun
->allocmap_size
=
464 DIV_ROUND_UP(sector_lun2qemu(iscsilun
->num_blocks
, iscsilun
),
465 iscsilun
->cluster_sectors
);
467 iscsilun
->allocmap
= bitmap_try_new(iscsilun
->allocmap_size
);
468 if (!iscsilun
->allocmap
) {
472 if (open_flags
& BDRV_O_NOCACHE
) {
473 /* in case that cache.direct = on all allocmap entries are
474 * treated as invalid to force a relookup of the block
475 * status on every read request */
479 iscsilun
->allocmap_valid
= bitmap_try_new(iscsilun
->allocmap_size
);
480 if (!iscsilun
->allocmap_valid
) {
481 /* if we are under memory pressure free the allocmap as well */
482 iscsi_allocmap_free(iscsilun
);
490 iscsi_allocmap_update(IscsiLun
*iscsilun
, int64_t sector_num
,
491 int nb_sectors
, bool allocated
, bool valid
)
493 int64_t cl_num_expanded
, nb_cls_expanded
, cl_num_shrunk
, nb_cls_shrunk
;
495 if (iscsilun
->allocmap
== NULL
) {
498 /* expand to entirely contain all affected clusters */
499 cl_num_expanded
= sector_num
/ iscsilun
->cluster_sectors
;
500 nb_cls_expanded
= DIV_ROUND_UP(sector_num
+ nb_sectors
,
501 iscsilun
->cluster_sectors
) - cl_num_expanded
;
502 /* shrink to touch only completely contained clusters */
503 cl_num_shrunk
= DIV_ROUND_UP(sector_num
, iscsilun
->cluster_sectors
);
504 nb_cls_shrunk
= (sector_num
+ nb_sectors
) / iscsilun
->cluster_sectors
507 bitmap_set(iscsilun
->allocmap
, cl_num_expanded
, nb_cls_expanded
);
509 if (nb_cls_shrunk
> 0) {
510 bitmap_clear(iscsilun
->allocmap
, cl_num_shrunk
, nb_cls_shrunk
);
514 if (iscsilun
->allocmap_valid
== NULL
) {
518 if (nb_cls_shrunk
> 0) {
519 bitmap_set(iscsilun
->allocmap_valid
, cl_num_shrunk
, nb_cls_shrunk
);
522 bitmap_clear(iscsilun
->allocmap_valid
, cl_num_expanded
,
528 iscsi_allocmap_set_allocated(IscsiLun
*iscsilun
, int64_t sector_num
,
531 iscsi_allocmap_update(iscsilun
, sector_num
, nb_sectors
, true, true);
535 iscsi_allocmap_set_unallocated(IscsiLun
*iscsilun
, int64_t sector_num
,
538 /* Note: if cache.direct=on the fifth argument to iscsi_allocmap_update
539 * is ignored, so this will in effect be an iscsi_allocmap_set_invalid.
541 iscsi_allocmap_update(iscsilun
, sector_num
, nb_sectors
, false, true);
544 static void iscsi_allocmap_set_invalid(IscsiLun
*iscsilun
, int64_t sector_num
,
547 iscsi_allocmap_update(iscsilun
, sector_num
, nb_sectors
, false, false);
550 static void iscsi_allocmap_invalidate(IscsiLun
*iscsilun
)
552 if (iscsilun
->allocmap
) {
553 bitmap_zero(iscsilun
->allocmap
, iscsilun
->allocmap_size
);
555 if (iscsilun
->allocmap_valid
) {
556 bitmap_zero(iscsilun
->allocmap_valid
, iscsilun
->allocmap_size
);
561 iscsi_allocmap_is_allocated(IscsiLun
*iscsilun
, int64_t sector_num
,
565 if (iscsilun
->allocmap
== NULL
) {
568 size
= DIV_ROUND_UP(sector_num
+ nb_sectors
, iscsilun
->cluster_sectors
);
569 return !(find_next_bit(iscsilun
->allocmap
, size
,
570 sector_num
/ iscsilun
->cluster_sectors
) == size
);
573 static inline bool iscsi_allocmap_is_valid(IscsiLun
*iscsilun
,
574 int64_t sector_num
, int nb_sectors
)
577 if (iscsilun
->allocmap_valid
== NULL
) {
580 size
= DIV_ROUND_UP(sector_num
+ nb_sectors
, iscsilun
->cluster_sectors
);
581 return (find_next_zero_bit(iscsilun
->allocmap_valid
, size
,
582 sector_num
/ iscsilun
->cluster_sectors
) == size
);
585 static int coroutine_fn
586 iscsi_co_writev_flags(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
587 QEMUIOVector
*iov
, int flags
)
589 IscsiLun
*iscsilun
= bs
->opaque
;
590 struct IscsiTask iTask
;
592 uint32_t num_sectors
;
593 bool fua
= flags
& BDRV_REQ_FUA
;
597 assert(iscsilun
->dpofua
);
599 if (!is_sector_request_lun_aligned(sector_num
, nb_sectors
, iscsilun
)) {
603 if (bs
->bl
.max_transfer
) {
604 assert(nb_sectors
<< BDRV_SECTOR_BITS
<= bs
->bl
.max_transfer
);
607 lba
= sector_qemu2lun(sector_num
, iscsilun
);
608 num_sectors
= sector_qemu2lun(nb_sectors
, iscsilun
);
609 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
610 qemu_mutex_lock(&iscsilun
->mutex
);
612 if (iscsilun
->use_16_for_rw
) {
613 #if LIBISCSI_API_VERSION >= (20160603)
614 iTask
.task
= iscsi_write16_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
615 NULL
, num_sectors
* iscsilun
->block_size
,
616 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
617 iscsi_co_generic_cb
, &iTask
,
618 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
620 iTask
.task
= iscsi_write10_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
621 NULL
, num_sectors
* iscsilun
->block_size
,
622 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
623 iscsi_co_generic_cb
, &iTask
,
624 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
627 iTask
.task
= iscsi_write16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
628 NULL
, num_sectors
* iscsilun
->block_size
,
629 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
630 iscsi_co_generic_cb
, &iTask
);
632 iTask
.task
= iscsi_write10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
633 NULL
, num_sectors
* iscsilun
->block_size
,
634 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
635 iscsi_co_generic_cb
, &iTask
);
638 if (iTask
.task
== NULL
) {
639 qemu_mutex_unlock(&iscsilun
->mutex
);
642 #if LIBISCSI_API_VERSION < (20160603)
643 scsi_task_set_iov_out(iTask
.task
, (struct scsi_iovec
*) iov
->iov
,
646 while (!iTask
.complete
) {
647 iscsi_set_events(iscsilun
);
648 qemu_mutex_unlock(&iscsilun
->mutex
);
649 qemu_coroutine_yield();
650 qemu_mutex_lock(&iscsilun
->mutex
);
653 if (iTask
.task
!= NULL
) {
654 scsi_free_scsi_task(iTask
.task
);
658 if (iTask
.do_retry
) {
663 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
664 iscsi_allocmap_set_invalid(iscsilun
, sector_num
, nb_sectors
);
669 iscsi_allocmap_set_allocated(iscsilun
, sector_num
, nb_sectors
);
672 qemu_mutex_unlock(&iscsilun
->mutex
);
678 static int64_t coroutine_fn
iscsi_co_get_block_status(BlockDriverState
*bs
,
680 int nb_sectors
, int *pnum
,
681 BlockDriverState
**file
)
683 IscsiLun
*iscsilun
= bs
->opaque
;
684 struct scsi_get_lba_status
*lbas
= NULL
;
685 struct scsi_lba_status_descriptor
*lbasd
= NULL
;
686 struct IscsiTask iTask
;
689 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
691 if (!is_sector_request_lun_aligned(sector_num
, nb_sectors
, iscsilun
)) {
696 /* default to all sectors allocated */
697 ret
= BDRV_BLOCK_DATA
;
698 ret
|= (sector_num
<< BDRV_SECTOR_BITS
) | BDRV_BLOCK_OFFSET_VALID
;
701 /* LUN does not support logical block provisioning */
702 if (!iscsilun
->lbpme
) {
706 qemu_mutex_lock(&iscsilun
->mutex
);
708 if (iscsi_get_lba_status_task(iscsilun
->iscsi
, iscsilun
->lun
,
709 sector_qemu2lun(sector_num
, iscsilun
),
710 8 + 16, iscsi_co_generic_cb
,
716 while (!iTask
.complete
) {
717 iscsi_set_events(iscsilun
);
718 qemu_mutex_unlock(&iscsilun
->mutex
);
719 qemu_coroutine_yield();
720 qemu_mutex_lock(&iscsilun
->mutex
);
723 if (iTask
.do_retry
) {
724 if (iTask
.task
!= NULL
) {
725 scsi_free_scsi_task(iTask
.task
);
732 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
733 /* in case the get_lba_status_callout fails (i.e.
734 * because the device is busy or the cmd is not
735 * supported) we pretend all blocks are allocated
736 * for backwards compatibility */
740 lbas
= scsi_datain_unmarshall(iTask
.task
);
746 lbasd
= &lbas
->descriptors
[0];
748 if (sector_qemu2lun(sector_num
, iscsilun
) != lbasd
->lba
) {
753 *pnum
= sector_lun2qemu(lbasd
->num_blocks
, iscsilun
);
755 if (lbasd
->provisioning
== SCSI_PROVISIONING_TYPE_DEALLOCATED
||
756 lbasd
->provisioning
== SCSI_PROVISIONING_TYPE_ANCHORED
) {
757 ret
&= ~BDRV_BLOCK_DATA
;
758 if (iscsilun
->lbprz
) {
759 ret
|= BDRV_BLOCK_ZERO
;
763 if (ret
& BDRV_BLOCK_ZERO
) {
764 iscsi_allocmap_set_unallocated(iscsilun
, sector_num
, *pnum
);
766 iscsi_allocmap_set_allocated(iscsilun
, sector_num
, *pnum
);
769 if (*pnum
> nb_sectors
) {
773 qemu_mutex_unlock(&iscsilun
->mutex
);
775 if (iTask
.task
!= NULL
) {
776 scsi_free_scsi_task(iTask
.task
);
778 if (ret
> 0 && ret
& BDRV_BLOCK_OFFSET_VALID
) {
784 static int coroutine_fn
iscsi_co_readv(BlockDriverState
*bs
,
785 int64_t sector_num
, int nb_sectors
,
788 IscsiLun
*iscsilun
= bs
->opaque
;
789 struct IscsiTask iTask
;
791 uint32_t num_sectors
;
793 if (!is_sector_request_lun_aligned(sector_num
, nb_sectors
, iscsilun
)) {
797 if (bs
->bl
.max_transfer
) {
798 assert(nb_sectors
<< BDRV_SECTOR_BITS
<= bs
->bl
.max_transfer
);
801 /* if cache.direct is off and we have a valid entry in our allocation map
802 * we can skip checking the block status and directly return zeroes if
803 * the request falls within an unallocated area */
804 if (iscsi_allocmap_is_valid(iscsilun
, sector_num
, nb_sectors
) &&
805 !iscsi_allocmap_is_allocated(iscsilun
, sector_num
, nb_sectors
)) {
806 qemu_iovec_memset(iov
, 0, 0x00, iov
->size
);
810 if (nb_sectors
>= ISCSI_CHECKALLOC_THRES
&&
811 !iscsi_allocmap_is_valid(iscsilun
, sector_num
, nb_sectors
) &&
812 !iscsi_allocmap_is_allocated(iscsilun
, sector_num
, nb_sectors
)) {
814 BlockDriverState
*file
;
815 /* check the block status from the beginning of the cluster
816 * containing the start sector */
817 int64_t ret
= iscsi_co_get_block_status(bs
,
818 sector_num
- sector_num
% iscsilun
->cluster_sectors
,
819 BDRV_REQUEST_MAX_SECTORS
, &pnum
, &file
);
823 /* if the whole request falls into an unallocated area we can avoid
824 * to read and directly return zeroes instead */
825 if (ret
& BDRV_BLOCK_ZERO
&&
826 pnum
>= nb_sectors
+ sector_num
% iscsilun
->cluster_sectors
) {
827 qemu_iovec_memset(iov
, 0, 0x00, iov
->size
);
832 lba
= sector_qemu2lun(sector_num
, iscsilun
);
833 num_sectors
= sector_qemu2lun(nb_sectors
, iscsilun
);
835 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
836 qemu_mutex_lock(&iscsilun
->mutex
);
838 if (iscsilun
->use_16_for_rw
) {
839 #if LIBISCSI_API_VERSION >= (20160603)
840 iTask
.task
= iscsi_read16_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
841 num_sectors
* iscsilun
->block_size
,
842 iscsilun
->block_size
, 0, 0, 0, 0, 0,
843 iscsi_co_generic_cb
, &iTask
,
844 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
846 iTask
.task
= iscsi_read10_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
847 num_sectors
* iscsilun
->block_size
,
848 iscsilun
->block_size
,
850 iscsi_co_generic_cb
, &iTask
,
851 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
854 iTask
.task
= iscsi_read16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
855 num_sectors
* iscsilun
->block_size
,
856 iscsilun
->block_size
, 0, 0, 0, 0, 0,
857 iscsi_co_generic_cb
, &iTask
);
859 iTask
.task
= iscsi_read10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
860 num_sectors
* iscsilun
->block_size
,
861 iscsilun
->block_size
,
863 iscsi_co_generic_cb
, &iTask
);
866 if (iTask
.task
== NULL
) {
867 qemu_mutex_unlock(&iscsilun
->mutex
);
870 #if LIBISCSI_API_VERSION < (20160603)
871 scsi_task_set_iov_in(iTask
.task
, (struct scsi_iovec
*) iov
->iov
, iov
->niov
);
873 while (!iTask
.complete
) {
874 iscsi_set_events(iscsilun
);
875 qemu_mutex_unlock(&iscsilun
->mutex
);
876 qemu_coroutine_yield();
877 qemu_mutex_lock(&iscsilun
->mutex
);
880 if (iTask
.task
!= NULL
) {
881 scsi_free_scsi_task(iTask
.task
);
885 if (iTask
.do_retry
) {
889 qemu_mutex_unlock(&iscsilun
->mutex
);
891 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
892 return iTask
.err_code
;
898 static int coroutine_fn
iscsi_co_flush(BlockDriverState
*bs
)
900 IscsiLun
*iscsilun
= bs
->opaque
;
901 struct IscsiTask iTask
;
903 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
904 qemu_mutex_lock(&iscsilun
->mutex
);
906 if (iscsi_synchronizecache10_task(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0, 0,
907 0, iscsi_co_generic_cb
, &iTask
) == NULL
) {
908 qemu_mutex_unlock(&iscsilun
->mutex
);
912 while (!iTask
.complete
) {
913 iscsi_set_events(iscsilun
);
914 qemu_mutex_unlock(&iscsilun
->mutex
);
915 qemu_coroutine_yield();
916 qemu_mutex_lock(&iscsilun
->mutex
);
919 if (iTask
.task
!= NULL
) {
920 scsi_free_scsi_task(iTask
.task
);
924 if (iTask
.do_retry
) {
928 qemu_mutex_unlock(&iscsilun
->mutex
);
930 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
931 return iTask
.err_code
;
938 /* Called (via iscsi_service) with QemuMutex held. */
940 iscsi_aio_ioctl_cb(struct iscsi_context
*iscsi
, int status
,
941 void *command_data
, void *opaque
)
943 IscsiAIOCB
*acb
= opaque
;
950 error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
951 iscsi_get_error(iscsi
));
952 acb
->status
= iscsi_translate_sense(&acb
->task
->sense
);
955 acb
->ioh
->driver_status
= 0;
956 acb
->ioh
->host_status
= 0;
958 acb
->ioh
->status
= status
;
960 #define SG_ERR_DRIVER_SENSE 0x08
962 if (status
== SCSI_STATUS_CHECK_CONDITION
&& acb
->task
->datain
.size
>= 2) {
965 acb
->ioh
->driver_status
|= SG_ERR_DRIVER_SENSE
;
967 acb
->ioh
->sb_len_wr
= acb
->task
->datain
.size
- 2;
968 ss
= (acb
->ioh
->mx_sb_len
>= acb
->ioh
->sb_len_wr
) ?
969 acb
->ioh
->mx_sb_len
: acb
->ioh
->sb_len_wr
;
970 memcpy(acb
->ioh
->sbp
, &acb
->task
->datain
.data
[2], ss
);
973 iscsi_schedule_bh(acb
);
976 static void iscsi_ioctl_bh_completion(void *opaque
)
978 IscsiAIOCB
*acb
= opaque
;
980 qemu_bh_delete(acb
->bh
);
981 acb
->common
.cb(acb
->common
.opaque
, acb
->ret
);
985 static void iscsi_ioctl_handle_emulated(IscsiAIOCB
*acb
, int req
, void *buf
)
987 BlockDriverState
*bs
= acb
->common
.bs
;
988 IscsiLun
*iscsilun
= bs
->opaque
;
992 case SG_GET_VERSION_NUM
:
996 ((struct sg_scsi_id
*)buf
)->scsi_type
= iscsilun
->type
;
1002 acb
->bh
= aio_bh_new(bdrv_get_aio_context(bs
),
1003 iscsi_ioctl_bh_completion
, acb
);
1005 qemu_bh_schedule(acb
->bh
);
1008 static BlockAIOCB
*iscsi_aio_ioctl(BlockDriverState
*bs
,
1009 unsigned long int req
, void *buf
,
1010 BlockCompletionFunc
*cb
, void *opaque
)
1012 IscsiLun
*iscsilun
= bs
->opaque
;
1013 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
1014 struct iscsi_data data
;
1017 acb
= qemu_aio_get(&iscsi_aiocb_info
, bs
, cb
, opaque
);
1019 acb
->iscsilun
= iscsilun
;
1021 acb
->status
= -EINPROGRESS
;
1026 iscsi_ioctl_handle_emulated(acb
, req
, buf
);
1027 return &acb
->common
;
1030 if (acb
->ioh
->cmd_len
> SCSI_CDB_MAX_SIZE
) {
1031 error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)",
1032 acb
->ioh
->cmd_len
, SCSI_CDB_MAX_SIZE
);
1033 qemu_aio_unref(acb
);
1037 acb
->task
= malloc(sizeof(struct scsi_task
));
1038 if (acb
->task
== NULL
) {
1039 error_report("iSCSI: Failed to allocate task for scsi command. %s",
1040 iscsi_get_error(iscsi
));
1041 qemu_aio_unref(acb
);
1044 memset(acb
->task
, 0, sizeof(struct scsi_task
));
1046 switch (acb
->ioh
->dxfer_direction
) {
1047 case SG_DXFER_TO_DEV
:
1048 acb
->task
->xfer_dir
= SCSI_XFER_WRITE
;
1050 case SG_DXFER_FROM_DEV
:
1051 acb
->task
->xfer_dir
= SCSI_XFER_READ
;
1054 acb
->task
->xfer_dir
= SCSI_XFER_NONE
;
1058 acb
->task
->cdb_size
= acb
->ioh
->cmd_len
;
1059 memcpy(&acb
->task
->cdb
[0], acb
->ioh
->cmdp
, acb
->ioh
->cmd_len
);
1060 acb
->task
->expxferlen
= acb
->ioh
->dxfer_len
;
1063 qemu_mutex_lock(&iscsilun
->mutex
);
1064 if (acb
->task
->xfer_dir
== SCSI_XFER_WRITE
) {
1065 if (acb
->ioh
->iovec_count
== 0) {
1066 data
.data
= acb
->ioh
->dxferp
;
1067 data
.size
= acb
->ioh
->dxfer_len
;
1069 scsi_task_set_iov_out(acb
->task
,
1070 (struct scsi_iovec
*) acb
->ioh
->dxferp
,
1071 acb
->ioh
->iovec_count
);
1075 if (iscsi_scsi_command_async(iscsi
, iscsilun
->lun
, acb
->task
,
1077 (data
.size
> 0) ? &data
: NULL
,
1079 qemu_mutex_unlock(&iscsilun
->mutex
);
1080 scsi_free_scsi_task(acb
->task
);
1081 qemu_aio_unref(acb
);
1085 /* tell libiscsi to read straight into the buffer we got from ioctl */
1086 if (acb
->task
->xfer_dir
== SCSI_XFER_READ
) {
1087 if (acb
->ioh
->iovec_count
== 0) {
1088 scsi_task_add_data_in_buffer(acb
->task
,
1089 acb
->ioh
->dxfer_len
,
1092 scsi_task_set_iov_in(acb
->task
,
1093 (struct scsi_iovec
*) acb
->ioh
->dxferp
,
1094 acb
->ioh
->iovec_count
);
1098 iscsi_set_events(iscsilun
);
1099 qemu_mutex_unlock(&iscsilun
->mutex
);
1101 return &acb
->common
;
1107 iscsi_getlength(BlockDriverState
*bs
)
1109 IscsiLun
*iscsilun
= bs
->opaque
;
1112 len
= iscsilun
->num_blocks
;
1113 len
*= iscsilun
->block_size
;
1119 coroutine_fn
iscsi_co_pdiscard(BlockDriverState
*bs
, int64_t offset
, int count
)
1121 IscsiLun
*iscsilun
= bs
->opaque
;
1122 struct IscsiTask iTask
;
1123 struct unmap_list list
;
1126 if (!is_byte_request_lun_aligned(offset
, count
, iscsilun
)) {
1130 if (!iscsilun
->lbp
.lbpu
) {
1131 /* UNMAP is not supported by the target */
1135 list
.lba
= offset
/ iscsilun
->block_size
;
1136 list
.num
= count
/ iscsilun
->block_size
;
1138 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
1139 qemu_mutex_lock(&iscsilun
->mutex
);
1141 if (iscsi_unmap_task(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0, &list
, 1,
1142 iscsi_co_generic_cb
, &iTask
) == NULL
) {
1147 while (!iTask
.complete
) {
1148 iscsi_set_events(iscsilun
);
1149 qemu_mutex_unlock(&iscsilun
->mutex
);
1150 qemu_coroutine_yield();
1151 qemu_mutex_lock(&iscsilun
->mutex
);
1154 if (iTask
.task
!= NULL
) {
1155 scsi_free_scsi_task(iTask
.task
);
1159 if (iTask
.do_retry
) {
1164 if (iTask
.status
== SCSI_STATUS_CHECK_CONDITION
) {
1165 /* the target might fail with a check condition if it
1166 is not happy with the alignment of the UNMAP request
1167 we silently fail in this case */
1171 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
1176 iscsi_allocmap_set_invalid(iscsilun
, offset
>> BDRV_SECTOR_BITS
,
1177 count
>> BDRV_SECTOR_BITS
);
1180 qemu_mutex_unlock(&iscsilun
->mutex
);
1185 coroutine_fn
iscsi_co_pwrite_zeroes(BlockDriverState
*bs
, int64_t offset
,
1186 int count
, BdrvRequestFlags flags
)
1188 IscsiLun
*iscsilun
= bs
->opaque
;
1189 struct IscsiTask iTask
;
1192 bool use_16_for_ws
= iscsilun
->use_16_for_rw
;
1195 if (!is_byte_request_lun_aligned(offset
, count
, iscsilun
)) {
1199 if (flags
& BDRV_REQ_MAY_UNMAP
) {
1200 if (!use_16_for_ws
&& !iscsilun
->lbp
.lbpws10
) {
1201 /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */
1202 use_16_for_ws
= true;
1204 if (use_16_for_ws
&& !iscsilun
->lbp
.lbpws
) {
1205 /* WRITESAME16 with UNMAP is not supported by the target,
1206 * fall back and try WRITESAME10/16 without UNMAP */
1207 flags
&= ~BDRV_REQ_MAY_UNMAP
;
1208 use_16_for_ws
= iscsilun
->use_16_for_rw
;
1212 if (!(flags
& BDRV_REQ_MAY_UNMAP
) && !iscsilun
->has_write_same
) {
1213 /* WRITESAME without UNMAP is not supported by the target */
1217 lba
= offset
/ iscsilun
->block_size
;
1218 nb_blocks
= count
/ iscsilun
->block_size
;
1220 if (iscsilun
->zeroblock
== NULL
) {
1221 iscsilun
->zeroblock
= g_try_malloc0(iscsilun
->block_size
);
1222 if (iscsilun
->zeroblock
== NULL
) {
1227 qemu_mutex_lock(&iscsilun
->mutex
);
1228 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
1230 if (use_16_for_ws
) {
1231 iTask
.task
= iscsi_writesame16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
1232 iscsilun
->zeroblock
, iscsilun
->block_size
,
1233 nb_blocks
, 0, !!(flags
& BDRV_REQ_MAY_UNMAP
),
1234 0, 0, iscsi_co_generic_cb
, &iTask
);
1236 iTask
.task
= iscsi_writesame10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
1237 iscsilun
->zeroblock
, iscsilun
->block_size
,
1238 nb_blocks
, 0, !!(flags
& BDRV_REQ_MAY_UNMAP
),
1239 0, 0, iscsi_co_generic_cb
, &iTask
);
1241 if (iTask
.task
== NULL
) {
1242 qemu_mutex_unlock(&iscsilun
->mutex
);
1246 while (!iTask
.complete
) {
1247 iscsi_set_events(iscsilun
);
1248 qemu_mutex_unlock(&iscsilun
->mutex
);
1249 qemu_coroutine_yield();
1250 qemu_mutex_lock(&iscsilun
->mutex
);
1253 if (iTask
.status
== SCSI_STATUS_CHECK_CONDITION
&&
1254 iTask
.task
->sense
.key
== SCSI_SENSE_ILLEGAL_REQUEST
&&
1255 (iTask
.task
->sense
.ascq
== SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE
||
1256 iTask
.task
->sense
.ascq
== SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB
)) {
1257 /* WRITE SAME is not supported by the target */
1258 iscsilun
->has_write_same
= false;
1259 scsi_free_scsi_task(iTask
.task
);
1264 if (iTask
.task
!= NULL
) {
1265 scsi_free_scsi_task(iTask
.task
);
1269 if (iTask
.do_retry
) {
1274 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
1275 iscsi_allocmap_set_invalid(iscsilun
, offset
>> BDRV_SECTOR_BITS
,
1276 count
>> BDRV_SECTOR_BITS
);
1281 if (flags
& BDRV_REQ_MAY_UNMAP
) {
1282 iscsi_allocmap_set_invalid(iscsilun
, offset
>> BDRV_SECTOR_BITS
,
1283 count
>> BDRV_SECTOR_BITS
);
1285 iscsi_allocmap_set_allocated(iscsilun
, offset
>> BDRV_SECTOR_BITS
,
1286 count
>> BDRV_SECTOR_BITS
);
1290 qemu_mutex_unlock(&iscsilun
->mutex
);
1294 static void apply_chap(struct iscsi_context
*iscsi
, QemuOpts
*opts
,
1297 const char *user
= NULL
;
1298 const char *password
= NULL
;
1299 const char *secretid
;
1300 char *secret
= NULL
;
1302 user
= qemu_opt_get(opts
, "user");
1307 secretid
= qemu_opt_get(opts
, "password-secret");
1308 password
= qemu_opt_get(opts
, "password");
1309 if (secretid
&& password
) {
1310 error_setg(errp
, "'password' and 'password-secret' properties are "
1311 "mutually exclusive");
1315 secret
= qcrypto_secret_lookup_as_utf8(secretid
, errp
);
1320 } else if (!password
) {
1321 error_setg(errp
, "CHAP username specified but no password was given");
1325 if (iscsi_set_initiator_username_pwd(iscsi
, user
, password
)) {
1326 error_setg(errp
, "Failed to set initiator username and password");
1332 static void apply_header_digest(struct iscsi_context
*iscsi
, QemuOpts
*opts
,
1335 const char *digest
= NULL
;
1337 digest
= qemu_opt_get(opts
, "header-digest");
1339 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE_CRC32C
);
1340 } else if (!strcmp(digest
, "crc32c")) {
1341 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_CRC32C
);
1342 } else if (!strcmp(digest
, "none")) {
1343 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE
);
1344 } else if (!strcmp(digest
, "crc32c-none")) {
1345 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_CRC32C_NONE
);
1346 } else if (!strcmp(digest
, "none-crc32c")) {
1347 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE_CRC32C
);
1349 error_setg(errp
, "Invalid header-digest setting : %s", digest
);
1353 static char *get_initiator_name(QemuOpts
*opts
)
1357 UuidInfo
*uuid_info
;
1359 name
= qemu_opt_get(opts
, "initiator-name");
1361 return g_strdup(name
);
1364 uuid_info
= qmp_query_uuid(NULL
);
1365 if (strcmp(uuid_info
->UUID
, UUID_NONE
) == 0) {
1366 name
= qemu_get_vm_name();
1368 name
= uuid_info
->UUID
;
1370 iscsi_name
= g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
1371 name
? ":" : "", name
? name
: "");
1372 qapi_free_UuidInfo(uuid_info
);
1376 static void iscsi_nop_timed_event(void *opaque
)
1378 IscsiLun
*iscsilun
= opaque
;
1380 qemu_mutex_lock(&iscsilun
->mutex
);
1381 if (iscsi_get_nops_in_flight(iscsilun
->iscsi
) >= MAX_NOP_FAILURES
) {
1382 error_report("iSCSI: NOP timeout. Reconnecting...");
1383 iscsilun
->request_timed_out
= true;
1384 } else if (iscsi_nop_out_async(iscsilun
->iscsi
, NULL
, NULL
, 0, NULL
) != 0) {
1385 error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
1389 timer_mod(iscsilun
->nop_timer
, qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + NOP_INTERVAL
);
1390 iscsi_set_events(iscsilun
);
1393 qemu_mutex_unlock(&iscsilun
->mutex
);
1396 static void iscsi_readcapacity_sync(IscsiLun
*iscsilun
, Error
**errp
)
1398 struct scsi_task
*task
= NULL
;
1399 struct scsi_readcapacity10
*rc10
= NULL
;
1400 struct scsi_readcapacity16
*rc16
= NULL
;
1401 int retries
= ISCSI_CMD_RETRIES
;
1405 scsi_free_scsi_task(task
);
1409 switch (iscsilun
->type
) {
1411 task
= iscsi_readcapacity16_sync(iscsilun
->iscsi
, iscsilun
->lun
);
1412 if (task
!= NULL
&& task
->status
== SCSI_STATUS_GOOD
) {
1413 rc16
= scsi_datain_unmarshall(task
);
1415 error_setg(errp
, "iSCSI: Failed to unmarshall readcapacity16 data.");
1417 iscsilun
->block_size
= rc16
->block_length
;
1418 iscsilun
->num_blocks
= rc16
->returned_lba
+ 1;
1419 iscsilun
->lbpme
= !!rc16
->lbpme
;
1420 iscsilun
->lbprz
= !!rc16
->lbprz
;
1421 iscsilun
->use_16_for_rw
= (rc16
->returned_lba
> 0xffffffff);
1425 if (task
!= NULL
&& task
->status
== SCSI_STATUS_CHECK_CONDITION
1426 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
) {
1429 /* Fall through and try READ CAPACITY(10) instead. */
1431 task
= iscsi_readcapacity10_sync(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0);
1432 if (task
!= NULL
&& task
->status
== SCSI_STATUS_GOOD
) {
1433 rc10
= scsi_datain_unmarshall(task
);
1435 error_setg(errp
, "iSCSI: Failed to unmarshall readcapacity10 data.");
1437 iscsilun
->block_size
= rc10
->block_size
;
1438 if (rc10
->lba
== 0) {
1439 /* blank disk loaded */
1440 iscsilun
->num_blocks
= 0;
1442 iscsilun
->num_blocks
= rc10
->lba
+ 1;
1450 } while (task
!= NULL
&& task
->status
== SCSI_STATUS_CHECK_CONDITION
1451 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
1454 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1455 error_setg(errp
, "iSCSI: failed to send readcapacity10/16 command");
1456 } else if (!iscsilun
->block_size
||
1457 iscsilun
->block_size
% BDRV_SECTOR_SIZE
) {
1458 error_setg(errp
, "iSCSI: the target returned an invalid "
1459 "block size of %d.", iscsilun
->block_size
);
1462 scsi_free_scsi_task(task
);
1466 static struct scsi_task
*iscsi_do_inquiry(struct iscsi_context
*iscsi
, int lun
,
1467 int evpd
, int pc
, void **inq
, Error
**errp
)
1470 struct scsi_task
*task
= NULL
;
1471 task
= iscsi_inquiry_sync(iscsi
, lun
, evpd
, pc
, 64);
1472 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1475 full_size
= scsi_datain_getfullsize(task
);
1476 if (full_size
> task
->datain
.size
) {
1477 scsi_free_scsi_task(task
);
1479 /* we need more data for the full list */
1480 task
= iscsi_inquiry_sync(iscsi
, lun
, evpd
, pc
, full_size
);
1481 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1486 *inq
= scsi_datain_unmarshall(task
);
1488 error_setg(errp
, "iSCSI: failed to unmarshall inquiry datain blob");
1495 error_setg(errp
, "iSCSI: Inquiry command failed : %s",
1496 iscsi_get_error(iscsi
));
1499 scsi_free_scsi_task(task
);
1504 static void iscsi_detach_aio_context(BlockDriverState
*bs
)
1506 IscsiLun
*iscsilun
= bs
->opaque
;
1508 aio_set_fd_handler(iscsilun
->aio_context
, iscsi_get_fd(iscsilun
->iscsi
),
1509 false, NULL
, NULL
, NULL
, NULL
);
1510 iscsilun
->events
= 0;
1512 if (iscsilun
->nop_timer
) {
1513 timer_del(iscsilun
->nop_timer
);
1514 timer_free(iscsilun
->nop_timer
);
1515 iscsilun
->nop_timer
= NULL
;
1517 if (iscsilun
->event_timer
) {
1518 timer_del(iscsilun
->event_timer
);
1519 timer_free(iscsilun
->event_timer
);
1520 iscsilun
->event_timer
= NULL
;
1524 static void iscsi_attach_aio_context(BlockDriverState
*bs
,
1525 AioContext
*new_context
)
1527 IscsiLun
*iscsilun
= bs
->opaque
;
1529 iscsilun
->aio_context
= new_context
;
1530 iscsi_set_events(iscsilun
);
1532 /* Set up a timer for sending out iSCSI NOPs */
1533 iscsilun
->nop_timer
= aio_timer_new(iscsilun
->aio_context
,
1534 QEMU_CLOCK_REALTIME
, SCALE_MS
,
1535 iscsi_nop_timed_event
, iscsilun
);
1536 timer_mod(iscsilun
->nop_timer
,
1537 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + NOP_INTERVAL
);
1539 /* Set up a timer for periodic calls to iscsi_set_events and to
1540 * scan for command timeout */
1541 iscsilun
->event_timer
= aio_timer_new(iscsilun
->aio_context
,
1542 QEMU_CLOCK_REALTIME
, SCALE_MS
,
1543 iscsi_timed_check_events
, iscsilun
);
1544 timer_mod(iscsilun
->event_timer
,
1545 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + EVENT_INTERVAL
);
1548 static void iscsi_modesense_sync(IscsiLun
*iscsilun
)
1550 struct scsi_task
*task
;
1551 struct scsi_mode_sense
*ms
= NULL
;
1552 iscsilun
->write_protected
= false;
1553 iscsilun
->dpofua
= false;
1555 task
= iscsi_modesense6_sync(iscsilun
->iscsi
, iscsilun
->lun
,
1556 1, SCSI_MODESENSE_PC_CURRENT
,
1559 error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s",
1560 iscsi_get_error(iscsilun
->iscsi
));
1564 if (task
->status
!= SCSI_STATUS_GOOD
) {
1565 error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable");
1568 ms
= scsi_datain_unmarshall(task
);
1570 error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s",
1571 iscsi_get_error(iscsilun
->iscsi
));
1574 iscsilun
->write_protected
= ms
->device_specific_parameter
& 0x80;
1575 iscsilun
->dpofua
= ms
->device_specific_parameter
& 0x10;
1579 scsi_free_scsi_task(task
);
1583 static void iscsi_parse_iscsi_option(const char *target
, QDict
*options
)
1587 const char *user
, *password
, *password_secret
, *initiator_name
,
1588 *header_digest
, *timeout
;
1590 list
= qemu_find_opts("iscsi");
1595 opts
= qemu_opts_find(list
, target
);
1597 opts
= QTAILQ_FIRST(&list
->head
);
1603 user
= qemu_opt_get(opts
, "user");
1605 qdict_set_default_str(options
, "user", user
);
1608 password
= qemu_opt_get(opts
, "password");
1610 qdict_set_default_str(options
, "password", password
);
1613 password_secret
= qemu_opt_get(opts
, "password-secret");
1614 if (password_secret
) {
1615 qdict_set_default_str(options
, "password-secret", password_secret
);
1618 initiator_name
= qemu_opt_get(opts
, "initiator-name");
1619 if (initiator_name
) {
1620 qdict_set_default_str(options
, "initiator-name", initiator_name
);
1623 header_digest
= qemu_opt_get(opts
, "header-digest");
1624 if (header_digest
) {
1625 /* -iscsi takes upper case values, but QAPI only supports lower case
1626 * enum constant names, so we have to convert here. */
1627 char *qapi_value
= g_ascii_strdown(header_digest
, -1);
1628 qdict_set_default_str(options
, "header-digest", qapi_value
);
1632 timeout
= qemu_opt_get(opts
, "timeout");
1634 qdict_set_default_str(options
, "timeout", timeout
);
1639 * We support iscsi url's on the form
1640 * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
1642 static void iscsi_parse_filename(const char *filename
, QDict
*options
,
1645 struct iscsi_url
*iscsi_url
;
1646 const char *transport_name
;
1649 iscsi_url
= iscsi_parse_full_url(NULL
, filename
);
1650 if (iscsi_url
== NULL
) {
1651 error_setg(errp
, "Failed to parse URL : %s", filename
);
1655 #if LIBISCSI_API_VERSION >= (20160603)
1656 switch (iscsi_url
->transport
) {
1658 transport_name
= "tcp";
1660 case ISER_TRANSPORT
:
1661 transport_name
= "iser";
1664 error_setg(errp
, "Unknown transport type (%d)",
1665 iscsi_url
->transport
);
1669 transport_name
= "tcp";
1672 qdict_set_default_str(options
, "transport", transport_name
);
1673 qdict_set_default_str(options
, "portal", iscsi_url
->portal
);
1674 qdict_set_default_str(options
, "target", iscsi_url
->target
);
1676 lun_str
= g_strdup_printf("%d", iscsi_url
->lun
);
1677 qdict_set_default_str(options
, "lun", lun_str
);
1680 /* User/password from -iscsi take precedence over those from the URL */
1681 iscsi_parse_iscsi_option(iscsi_url
->target
, options
);
1683 if (iscsi_url
->user
[0] != '\0') {
1684 qdict_set_default_str(options
, "user", iscsi_url
->user
);
1685 qdict_set_default_str(options
, "password", iscsi_url
->passwd
);
1688 iscsi_destroy_url(iscsi_url
);
1691 static QemuOptsList runtime_opts
= {
1693 .head
= QTAILQ_HEAD_INITIALIZER(runtime_opts
.head
),
1696 .name
= "transport",
1697 .type
= QEMU_OPT_STRING
,
1701 .type
= QEMU_OPT_STRING
,
1705 .type
= QEMU_OPT_STRING
,
1709 .type
= QEMU_OPT_STRING
,
1713 .type
= QEMU_OPT_STRING
,
1716 .name
= "password-secret",
1717 .type
= QEMU_OPT_STRING
,
1721 .type
= QEMU_OPT_NUMBER
,
1724 .name
= "initiator-name",
1725 .type
= QEMU_OPT_STRING
,
1728 .name
= "header-digest",
1729 .type
= QEMU_OPT_STRING
,
1733 .type
= QEMU_OPT_NUMBER
,
1737 .type
= QEMU_OPT_STRING
,
1739 { /* end of list */ }
1743 static int iscsi_open(BlockDriverState
*bs
, QDict
*options
, int flags
,
1746 IscsiLun
*iscsilun
= bs
->opaque
;
1747 struct iscsi_context
*iscsi
= NULL
;
1748 struct scsi_task
*task
= NULL
;
1749 struct scsi_inquiry_standard
*inq
= NULL
;
1750 struct scsi_inquiry_supported_pages
*inq_vpd
;
1751 char *initiator_name
= NULL
;
1753 Error
*local_err
= NULL
;
1754 const char *transport_name
, *portal
, *target
, *filename
;
1755 #if LIBISCSI_API_VERSION >= (20160603)
1756 enum iscsi_transport_type transport
;
1758 int i
, ret
= 0, timeout
= 0, lun
;
1760 /* If we are given a filename, parse the filename, with precedence given to
1761 * filename encoded options */
1762 filename
= qdict_get_try_str(options
, "filename");
1764 error_report("Warning: 'filename' option specified. "
1765 "This is an unsupported option, and may be deprecated "
1767 iscsi_parse_filename(filename
, options
, &local_err
);
1770 error_propagate(errp
, local_err
);
1775 opts
= qemu_opts_create(&runtime_opts
, NULL
, 0, &error_abort
);
1776 qemu_opts_absorb_qdict(opts
, options
, &local_err
);
1778 error_propagate(errp
, local_err
);
1783 transport_name
= qemu_opt_get(opts
, "transport");
1784 portal
= qemu_opt_get(opts
, "portal");
1785 target
= qemu_opt_get(opts
, "target");
1786 lun
= qemu_opt_get_number(opts
, "lun", 0);
1788 if (!transport_name
|| !portal
|| !target
) {
1789 error_setg(errp
, "Need all of transport, portal and target options");
1794 if (!strcmp(transport_name
, "tcp")) {
1795 #if LIBISCSI_API_VERSION >= (20160603)
1796 transport
= TCP_TRANSPORT
;
1797 } else if (!strcmp(transport_name
, "iser")) {
1798 transport
= ISER_TRANSPORT
;
1800 /* TCP is what older libiscsi versions always use */
1803 error_setg(errp
, "Unknown transport: %s", transport_name
);
1808 memset(iscsilun
, 0, sizeof(IscsiLun
));
1810 initiator_name
= get_initiator_name(opts
);
1812 iscsi
= iscsi_create_context(initiator_name
);
1813 if (iscsi
== NULL
) {
1814 error_setg(errp
, "iSCSI: Failed to create iSCSI context.");
1818 #if LIBISCSI_API_VERSION >= (20160603)
1819 if (iscsi_init_transport(iscsi
, transport
)) {
1820 error_setg(errp
, ("Error initializing transport."));
1825 if (iscsi_set_targetname(iscsi
, target
)) {
1826 error_setg(errp
, "iSCSI: Failed to set target name.");
1831 /* check if we got CHAP username/password via the options */
1832 apply_chap(iscsi
, opts
, &local_err
);
1833 if (local_err
!= NULL
) {
1834 error_propagate(errp
, local_err
);
1839 if (iscsi_set_session_type(iscsi
, ISCSI_SESSION_NORMAL
) != 0) {
1840 error_setg(errp
, "iSCSI: Failed to set session type to normal.");
1845 /* check if we got HEADER_DIGEST via the options */
1846 apply_header_digest(iscsi
, opts
, &local_err
);
1847 if (local_err
!= NULL
) {
1848 error_propagate(errp
, local_err
);
1853 /* timeout handling is broken in libiscsi before 1.15.0 */
1854 timeout
= qemu_opt_get_number(opts
, "timeout", 0);
1855 #if LIBISCSI_API_VERSION >= 20150621
1856 iscsi_set_timeout(iscsi
, timeout
);
1859 error_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
1863 if (iscsi_full_connect_sync(iscsi
, portal
, lun
) != 0) {
1864 error_setg(errp
, "iSCSI: Failed to connect to LUN : %s",
1865 iscsi_get_error(iscsi
));
1870 iscsilun
->iscsi
= iscsi
;
1871 iscsilun
->aio_context
= bdrv_get_aio_context(bs
);
1872 iscsilun
->lun
= lun
;
1873 iscsilun
->has_write_same
= true;
1875 task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0,
1876 (void **) &inq
, errp
);
1881 iscsilun
->type
= inq
->periperal_device_type
;
1882 scsi_free_scsi_task(task
);
1885 iscsi_modesense_sync(iscsilun
);
1886 if (iscsilun
->dpofua
) {
1887 bs
->supported_write_flags
= BDRV_REQ_FUA
;
1889 bs
->supported_zero_flags
= BDRV_REQ_MAY_UNMAP
;
1891 /* Check the write protect flag of the LUN if we want to write */
1892 if (iscsilun
->type
== TYPE_DISK
&& (flags
& BDRV_O_RDWR
) &&
1893 iscsilun
->write_protected
) {
1894 error_setg(errp
, "Cannot open a write protected LUN as read-write");
1899 iscsi_readcapacity_sync(iscsilun
, &local_err
);
1900 if (local_err
!= NULL
) {
1901 error_propagate(errp
, local_err
);
1905 bs
->total_sectors
= sector_lun2qemu(iscsilun
->num_blocks
, iscsilun
);
1907 /* We don't have any emulation for devices other than disks and CD-ROMs, so
1908 * this must be sg ioctl compatible. We force it to be sg, otherwise qemu
1909 * will try to read from the device to guess the image format.
1911 if (iscsilun
->type
!= TYPE_DISK
&& iscsilun
->type
!= TYPE_ROM
) {
1915 task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1916 SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES
,
1917 (void **) &inq_vpd
, errp
);
1922 for (i
= 0; i
< inq_vpd
->num_pages
; i
++) {
1923 struct scsi_task
*inq_task
;
1924 struct scsi_inquiry_logical_block_provisioning
*inq_lbp
;
1925 struct scsi_inquiry_block_limits
*inq_bl
;
1926 switch (inq_vpd
->pages
[i
]) {
1927 case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING
:
1928 inq_task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1929 SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING
,
1930 (void **) &inq_lbp
, errp
);
1931 if (inq_task
== NULL
) {
1935 memcpy(&iscsilun
->lbp
, inq_lbp
,
1936 sizeof(struct scsi_inquiry_logical_block_provisioning
));
1937 scsi_free_scsi_task(inq_task
);
1939 case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS
:
1940 inq_task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1941 SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS
,
1942 (void **) &inq_bl
, errp
);
1943 if (inq_task
== NULL
) {
1947 memcpy(&iscsilun
->bl
, inq_bl
,
1948 sizeof(struct scsi_inquiry_block_limits
));
1949 scsi_free_scsi_task(inq_task
);
1955 scsi_free_scsi_task(task
);
1958 qemu_mutex_init(&iscsilun
->mutex
);
1959 iscsi_attach_aio_context(bs
, iscsilun
->aio_context
);
1961 /* Guess the internal cluster (page) size of the iscsi target by the means
1962 * of opt_unmap_gran. Transfer the unmap granularity only if it has a
1963 * reasonable size */
1964 if (iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
>= 4 * 1024 &&
1965 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
<= 16 * 1024 * 1024) {
1966 iscsilun
->cluster_sectors
= (iscsilun
->bl
.opt_unmap_gran
*
1967 iscsilun
->block_size
) >> BDRV_SECTOR_BITS
;
1968 if (iscsilun
->lbprz
) {
1969 ret
= iscsi_allocmap_init(iscsilun
, bs
->open_flags
);
1974 qemu_opts_del(opts
);
1975 g_free(initiator_name
);
1977 scsi_free_scsi_task(task
);
1981 if (iscsi
!= NULL
) {
1982 if (iscsi_is_logged_in(iscsi
)) {
1983 iscsi_logout_sync(iscsi
);
1985 iscsi_destroy_context(iscsi
);
1987 memset(iscsilun
, 0, sizeof(IscsiLun
));
1993 static void iscsi_close(BlockDriverState
*bs
)
1995 IscsiLun
*iscsilun
= bs
->opaque
;
1996 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
1998 iscsi_detach_aio_context(bs
);
1999 if (iscsi_is_logged_in(iscsi
)) {
2000 iscsi_logout_sync(iscsi
);
2002 iscsi_destroy_context(iscsi
);
2003 g_free(iscsilun
->zeroblock
);
2004 iscsi_allocmap_free(iscsilun
);
2005 qemu_mutex_destroy(&iscsilun
->mutex
);
2006 memset(iscsilun
, 0, sizeof(IscsiLun
));
2009 static void iscsi_refresh_limits(BlockDriverState
*bs
, Error
**errp
)
2011 /* We don't actually refresh here, but just return data queried in
2012 * iscsi_open(): iscsi targets don't change their limits. */
2014 IscsiLun
*iscsilun
= bs
->opaque
;
2015 uint64_t max_xfer_len
= iscsilun
->use_16_for_rw
? 0xffffffff : 0xffff;
2016 unsigned int block_size
= MAX(BDRV_SECTOR_SIZE
, iscsilun
->block_size
);
2018 assert(iscsilun
->block_size
>= BDRV_SECTOR_SIZE
|| bs
->sg
);
2020 bs
->bl
.request_alignment
= block_size
;
2022 if (iscsilun
->bl
.max_xfer_len
) {
2023 max_xfer_len
= MIN(max_xfer_len
, iscsilun
->bl
.max_xfer_len
);
2026 if (max_xfer_len
* block_size
< INT_MAX
) {
2027 bs
->bl
.max_transfer
= max_xfer_len
* iscsilun
->block_size
;
2030 if (iscsilun
->lbp
.lbpu
) {
2031 if (iscsilun
->bl
.max_unmap
< 0xffffffff / block_size
) {
2032 bs
->bl
.max_pdiscard
=
2033 iscsilun
->bl
.max_unmap
* iscsilun
->block_size
;
2035 bs
->bl
.pdiscard_alignment
=
2036 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
;
2038 bs
->bl
.pdiscard_alignment
= iscsilun
->block_size
;
2041 if (iscsilun
->bl
.max_ws_len
< 0xffffffff / block_size
) {
2042 bs
->bl
.max_pwrite_zeroes
=
2043 iscsilun
->bl
.max_ws_len
* iscsilun
->block_size
;
2045 if (iscsilun
->lbp
.lbpws
) {
2046 bs
->bl
.pwrite_zeroes_alignment
=
2047 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
;
2049 bs
->bl
.pwrite_zeroes_alignment
= iscsilun
->block_size
;
2051 if (iscsilun
->bl
.opt_xfer_len
&&
2052 iscsilun
->bl
.opt_xfer_len
< INT_MAX
/ block_size
) {
2053 bs
->bl
.opt_transfer
= pow2floor(iscsilun
->bl
.opt_xfer_len
*
2054 iscsilun
->block_size
);
2058 /* Note that this will not re-establish a connection with an iSCSI target - it
2059 * is effectively a NOP. */
2060 static int iscsi_reopen_prepare(BDRVReopenState
*state
,
2061 BlockReopenQueue
*queue
, Error
**errp
)
2063 IscsiLun
*iscsilun
= state
->bs
->opaque
;
2065 if (state
->flags
& BDRV_O_RDWR
&& iscsilun
->write_protected
) {
2066 error_setg(errp
, "Cannot open a write protected LUN as read-write");
2072 static void iscsi_reopen_commit(BDRVReopenState
*reopen_state
)
2074 IscsiLun
*iscsilun
= reopen_state
->bs
->opaque
;
2076 /* the cache.direct status might have changed */
2077 if (iscsilun
->allocmap
!= NULL
) {
2078 iscsi_allocmap_init(iscsilun
, reopen_state
->flags
);
2082 static int iscsi_truncate(BlockDriverState
*bs
, int64_t offset
, Error
**errp
)
2084 IscsiLun
*iscsilun
= bs
->opaque
;
2085 Error
*local_err
= NULL
;
2087 if (iscsilun
->type
!= TYPE_DISK
) {
2088 error_setg(errp
, "Cannot resize non-disk iSCSI devices");
2092 iscsi_readcapacity_sync(iscsilun
, &local_err
);
2093 if (local_err
!= NULL
) {
2094 error_propagate(errp
, local_err
);
2098 if (offset
> iscsi_getlength(bs
)) {
2099 error_setg(errp
, "Cannot grow iSCSI devices");
2103 if (iscsilun
->allocmap
!= NULL
) {
2104 iscsi_allocmap_init(iscsilun
, bs
->open_flags
);
2110 static int iscsi_create(const char *filename
, QemuOpts
*opts
, Error
**errp
)
2113 int64_t total_size
= 0;
2114 BlockDriverState
*bs
;
2115 IscsiLun
*iscsilun
= NULL
;
2117 Error
*local_err
= NULL
;
2121 /* Read out options */
2122 total_size
= DIV_ROUND_UP(qemu_opt_get_size_del(opts
, BLOCK_OPT_SIZE
, 0),
2124 bs
->opaque
= g_new0(struct IscsiLun
, 1);
2125 iscsilun
= bs
->opaque
;
2127 bs_options
= qdict_new();
2128 iscsi_parse_filename(filename
, bs_options
, &local_err
);
2130 error_propagate(errp
, local_err
);
2133 ret
= iscsi_open(bs
, bs_options
, 0, NULL
);
2135 QDECREF(bs_options
);
2140 iscsi_detach_aio_context(bs
);
2141 if (iscsilun
->type
!= TYPE_DISK
) {
2145 if (bs
->total_sectors
< total_size
) {
2152 if (iscsilun
->iscsi
!= NULL
) {
2153 iscsi_destroy_context(iscsilun
->iscsi
);
2161 static int iscsi_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
)
2163 IscsiLun
*iscsilun
= bs
->opaque
;
2164 bdi
->unallocated_blocks_are_zero
= iscsilun
->lbprz
;
2165 bdi
->can_write_zeroes_with_unmap
= iscsilun
->lbprz
&& iscsilun
->lbp
.lbpws
;
2166 bdi
->cluster_size
= iscsilun
->cluster_sectors
* BDRV_SECTOR_SIZE
;
2170 static void iscsi_invalidate_cache(BlockDriverState
*bs
,
2173 IscsiLun
*iscsilun
= bs
->opaque
;
2174 iscsi_allocmap_invalidate(iscsilun
);
2177 static QemuOptsList iscsi_create_opts
= {
2178 .name
= "iscsi-create-opts",
2179 .head
= QTAILQ_HEAD_INITIALIZER(iscsi_create_opts
.head
),
2182 .name
= BLOCK_OPT_SIZE
,
2183 .type
= QEMU_OPT_SIZE
,
2184 .help
= "Virtual disk size"
2186 { /* end of list */ }
2190 static BlockDriver bdrv_iscsi
= {
2191 .format_name
= "iscsi",
2192 .protocol_name
= "iscsi",
2194 .instance_size
= sizeof(IscsiLun
),
2195 .bdrv_parse_filename
= iscsi_parse_filename
,
2196 .bdrv_file_open
= iscsi_open
,
2197 .bdrv_close
= iscsi_close
,
2198 .bdrv_create
= iscsi_create
,
2199 .create_opts
= &iscsi_create_opts
,
2200 .bdrv_reopen_prepare
= iscsi_reopen_prepare
,
2201 .bdrv_reopen_commit
= iscsi_reopen_commit
,
2202 .bdrv_invalidate_cache
= iscsi_invalidate_cache
,
2204 .bdrv_getlength
= iscsi_getlength
,
2205 .bdrv_get_info
= iscsi_get_info
,
2206 .bdrv_truncate
= iscsi_truncate
,
2207 .bdrv_refresh_limits
= iscsi_refresh_limits
,
2209 .bdrv_co_get_block_status
= iscsi_co_get_block_status
,
2210 .bdrv_co_pdiscard
= iscsi_co_pdiscard
,
2211 .bdrv_co_pwrite_zeroes
= iscsi_co_pwrite_zeroes
,
2212 .bdrv_co_readv
= iscsi_co_readv
,
2213 .bdrv_co_writev_flags
= iscsi_co_writev_flags
,
2214 .bdrv_co_flush_to_disk
= iscsi_co_flush
,
2217 .bdrv_aio_ioctl
= iscsi_aio_ioctl
,
2220 .bdrv_detach_aio_context
= iscsi_detach_aio_context
,
2221 .bdrv_attach_aio_context
= iscsi_attach_aio_context
,
2224 #if LIBISCSI_API_VERSION >= (20160603)
2225 static BlockDriver bdrv_iser
= {
2226 .format_name
= "iser",
2227 .protocol_name
= "iser",
2229 .instance_size
= sizeof(IscsiLun
),
2230 .bdrv_parse_filename
= iscsi_parse_filename
,
2231 .bdrv_file_open
= iscsi_open
,
2232 .bdrv_close
= iscsi_close
,
2233 .bdrv_create
= iscsi_create
,
2234 .create_opts
= &iscsi_create_opts
,
2235 .bdrv_reopen_prepare
= iscsi_reopen_prepare
,
2236 .bdrv_reopen_commit
= iscsi_reopen_commit
,
2237 .bdrv_invalidate_cache
= iscsi_invalidate_cache
,
2239 .bdrv_getlength
= iscsi_getlength
,
2240 .bdrv_get_info
= iscsi_get_info
,
2241 .bdrv_truncate
= iscsi_truncate
,
2242 .bdrv_refresh_limits
= iscsi_refresh_limits
,
2244 .bdrv_co_get_block_status
= iscsi_co_get_block_status
,
2245 .bdrv_co_pdiscard
= iscsi_co_pdiscard
,
2246 .bdrv_co_pwrite_zeroes
= iscsi_co_pwrite_zeroes
,
2247 .bdrv_co_readv
= iscsi_co_readv
,
2248 .bdrv_co_writev_flags
= iscsi_co_writev_flags
,
2249 .bdrv_co_flush_to_disk
= iscsi_co_flush
,
2252 .bdrv_aio_ioctl
= iscsi_aio_ioctl
,
2255 .bdrv_detach_aio_context
= iscsi_detach_aio_context
,
2256 .bdrv_attach_aio_context
= iscsi_attach_aio_context
,
2260 static void iscsi_block_init(void)
2262 bdrv_register(&bdrv_iscsi
);
2263 #if LIBISCSI_API_VERSION >= (20160603)
2264 bdrv_register(&bdrv_iser
);
2268 block_init(iscsi_block_init
);