2 * QEMU Block driver for iSCSI images
4 * Copyright (c) 2010-2011 Ronnie Sahlberg <ronniesahlberg@gmail.com>
5 * Copyright (c) 2012-2017 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/config-file.h"
32 #include "qemu/error-report.h"
33 #include "qemu/bitops.h"
34 #include "qemu/bitmap.h"
35 #include "block/block_int.h"
36 #include "block/qdict.h"
37 #include "scsi/constants.h"
39 #include "qemu/option.h"
40 #include "qemu/uuid.h"
41 #include "qapi/error.h"
42 #include "qapi/qapi-commands-misc.h"
43 #include "qapi/qmp/qdict.h"
44 #include "qapi/qmp/qstring.h"
45 #include "crypto/secret.h"
46 #include "scsi/utils.h"
48 /* Conflict between scsi/utils.h and libiscsi! :( */
49 #define SCSI_XFER_NONE ISCSI_XFER_NONE
50 #include <iscsi/iscsi.h>
51 #include <iscsi/scsi-lowlevel.h>
53 QEMU_BUILD_BUG_ON((int)SCSI_XFER_NONE
!= (int)ISCSI_XFER_NONE
);
59 typedef struct IscsiLun
{
60 struct iscsi_context
*iscsi
;
61 AioContext
*aio_context
;
63 enum scsi_inquiry_peripheral_device_type type
;
68 QEMUTimer
*event_timer
;
70 struct scsi_inquiry_logical_block_provisioning lbp
;
71 struct scsi_inquiry_block_limits bl
;
72 struct scsi_inquiry_device_designator
*dd
;
73 unsigned char *zeroblock
;
74 /* The allocmap tracks which clusters (pages) on the iSCSI target are
75 * allocated and which are not. In case a target returns zeros for
76 * unallocated pages (iscsilun->lprz) we can directly return zeros instead
77 * of reading zeros over the wire if a read request falls within an
78 * unallocated block. As there are 3 possible states we need 2 bitmaps to
79 * track. allocmap_valid keeps track if QEMU's information about a page is
80 * valid. allocmap tracks if a page is allocated or not. In case QEMU has no
81 * valid information about a page the corresponding allocmap entry should be
82 * switched to unallocated as well to force a new lookup of the allocation
83 * status as lookups are generally skipped if a page is suspect to be
84 * allocated. If a iSCSI target is opened with cache.direct = on the
85 * allocmap_valid does not exist turning all cached information invalid so
86 * that a fresh lookup is made for any page even if allocmap entry returns
87 * it's unallocated. */
88 unsigned long *allocmap
;
89 unsigned long *allocmap_valid
;
98 bool request_timed_out
;
101 typedef struct IscsiTask
{
106 struct scsi_task
*task
;
109 QEMUTimer retry_timer
;
114 typedef struct IscsiAIOCB
{
118 struct scsi_task
*task
;
129 /* libiscsi uses time_t so its enough to process events every second */
130 #define EVENT_INTERVAL 1000
131 #define NOP_INTERVAL 5000
132 #define MAX_NOP_FAILURES 3
133 #define ISCSI_CMD_RETRIES ARRAY_SIZE(iscsi_retry_times)
134 static const unsigned iscsi_retry_times
[] = {8, 32, 128, 512, 2048, 8192, 32768};
136 /* this threshold is a trade-off knob to choose between
137 * the potential additional overhead of an extra GET_LBA_STATUS request
138 * vs. unnecessarily reading a lot of zero sectors over the wire.
139 * If a read request is greater or equal than ISCSI_CHECKALLOC_THRES
140 * sectors we check the allocation status of the area covered by the
141 * request first if the allocationmap indicates that the area might be
143 #define ISCSI_CHECKALLOC_THRES 64
150 qemu_bh_delete(acb
->bh
);
155 acb
->common
.cb(acb
->common
.opaque
, acb
->status
);
157 if (acb
->task
!= NULL
) {
158 scsi_free_scsi_task(acb
->task
);
166 iscsi_schedule_bh(IscsiAIOCB
*acb
)
171 acb
->bh
= aio_bh_new(acb
->iscsilun
->aio_context
, iscsi_bh_cb
, acb
);
172 qemu_bh_schedule(acb
->bh
);
175 static void iscsi_co_generic_bh_cb(void *opaque
)
177 struct IscsiTask
*iTask
= opaque
;
180 aio_co_wake(iTask
->co
);
183 static void iscsi_retry_timer_expired(void *opaque
)
185 struct IscsiTask
*iTask
= opaque
;
188 aio_co_wake(iTask
->co
);
192 static inline unsigned exp_random(double mean
)
194 return -mean
* log((double)rand() / RAND_MAX
);
197 /* SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST was introduced in
198 * libiscsi 1.10.0, together with other constants we need. Use it as
199 * a hint that we have to define them ourselves if needed, to keep the
200 * minimum required libiscsi version at 1.9.0. We use an ASCQ macro for
201 * the test because SCSI_STATUS_* is an enum.
203 * To guard against future changes where SCSI_SENSE_ASCQ_* also becomes
204 * an enum, check against the LIBISCSI_API_VERSION macro, which was
205 * introduced in 1.11.0. If it is present, there is no need to define
208 #if !defined(SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST) && \
209 !defined(LIBISCSI_API_VERSION)
210 #define SCSI_STATUS_TASK_SET_FULL 0x28
211 #define SCSI_STATUS_TIMEOUT 0x0f000002
212 #define SCSI_SENSE_ASCQ_INVALID_FIELD_IN_PARAMETER_LIST 0x2600
213 #define SCSI_SENSE_ASCQ_PARAMETER_LIST_LENGTH_ERROR 0x1a00
216 #ifndef LIBISCSI_API_VERSION
217 #define LIBISCSI_API_VERSION 20130701
220 static int iscsi_translate_sense(struct scsi_sense
*sense
)
222 return - scsi_sense_to_errno(sense
->key
,
223 (sense
->ascq
& 0xFF00) >> 8,
227 /* Called (via iscsi_service) with QemuMutex held. */
229 iscsi_co_generic_cb(struct iscsi_context
*iscsi
, int status
,
230 void *command_data
, void *opaque
)
232 struct IscsiTask
*iTask
= opaque
;
233 struct scsi_task
*task
= command_data
;
235 iTask
->status
= status
;
239 if (status
!= SCSI_STATUS_GOOD
) {
240 if (iTask
->retries
++ < ISCSI_CMD_RETRIES
) {
241 if (status
== SCSI_STATUS_CHECK_CONDITION
242 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
) {
243 error_report("iSCSI CheckCondition: %s",
244 iscsi_get_error(iscsi
));
248 if (status
== SCSI_STATUS_BUSY
||
249 status
== SCSI_STATUS_TIMEOUT
||
250 status
== SCSI_STATUS_TASK_SET_FULL
) {
251 unsigned retry_time
=
252 exp_random(iscsi_retry_times
[iTask
->retries
- 1]);
253 if (status
== SCSI_STATUS_TIMEOUT
) {
254 /* make sure the request is rescheduled AFTER the
255 * reconnect is initiated */
256 retry_time
= EVENT_INTERVAL
* 2;
257 iTask
->iscsilun
->request_timed_out
= true;
259 error_report("iSCSI Busy/TaskSetFull/TimeOut"
260 " (retry #%u in %u ms): %s",
261 iTask
->retries
, retry_time
,
262 iscsi_get_error(iscsi
));
263 aio_timer_init(iTask
->iscsilun
->aio_context
,
264 &iTask
->retry_timer
, QEMU_CLOCK_REALTIME
,
265 SCALE_MS
, iscsi_retry_timer_expired
, iTask
);
266 timer_mod(&iTask
->retry_timer
,
267 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + retry_time
);
272 iTask
->err_code
= iscsi_translate_sense(&task
->sense
);
273 iTask
->err_str
= g_strdup(iscsi_get_error(iscsi
));
278 aio_bh_schedule_oneshot(iTask
->iscsilun
->aio_context
,
279 iscsi_co_generic_bh_cb
, iTask
);
285 static void iscsi_co_init_iscsitask(IscsiLun
*iscsilun
, struct IscsiTask
*iTask
)
287 *iTask
= (struct IscsiTask
) {
288 .co
= qemu_coroutine_self(),
289 .iscsilun
= iscsilun
,
294 iscsi_abort_task_cb(struct iscsi_context
*iscsi
, int status
, void *command_data
,
297 IscsiAIOCB
*acb
= private_data
;
299 acb
->status
= -ECANCELED
;
300 iscsi_schedule_bh(acb
);
304 iscsi_aio_cancel(BlockAIOCB
*blockacb
)
306 IscsiAIOCB
*acb
= (IscsiAIOCB
*)blockacb
;
307 IscsiLun
*iscsilun
= acb
->iscsilun
;
309 if (acb
->status
!= -EINPROGRESS
) {
313 /* send a task mgmt call to the target to cancel the task on the target */
314 iscsi_task_mgmt_abort_task_async(iscsilun
->iscsi
, acb
->task
,
315 iscsi_abort_task_cb
, acb
);
319 static const AIOCBInfo iscsi_aiocb_info
= {
320 .aiocb_size
= sizeof(IscsiAIOCB
),
321 .cancel_async
= iscsi_aio_cancel
,
325 static void iscsi_process_read(void *arg
);
326 static void iscsi_process_write(void *arg
);
328 /* Called with QemuMutex held. */
330 iscsi_set_events(IscsiLun
*iscsilun
)
332 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
333 int ev
= iscsi_which_events(iscsi
);
335 if (ev
!= iscsilun
->events
) {
336 aio_set_fd_handler(iscsilun
->aio_context
, iscsi_get_fd(iscsi
),
338 (ev
& POLLIN
) ? iscsi_process_read
: NULL
,
339 (ev
& POLLOUT
) ? iscsi_process_write
: NULL
,
342 iscsilun
->events
= ev
;
346 static void iscsi_timed_check_events(void *opaque
)
348 IscsiLun
*iscsilun
= opaque
;
350 /* check for timed out requests */
351 iscsi_service(iscsilun
->iscsi
, 0);
353 if (iscsilun
->request_timed_out
) {
354 iscsilun
->request_timed_out
= false;
355 iscsi_reconnect(iscsilun
->iscsi
);
358 /* newer versions of libiscsi may return zero events. Ensure we are able
359 * to return to service once this situation changes. */
360 iscsi_set_events(iscsilun
);
362 timer_mod(iscsilun
->event_timer
,
363 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + EVENT_INTERVAL
);
367 iscsi_process_read(void *arg
)
369 IscsiLun
*iscsilun
= arg
;
370 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
372 qemu_mutex_lock(&iscsilun
->mutex
);
373 iscsi_service(iscsi
, POLLIN
);
374 iscsi_set_events(iscsilun
);
375 qemu_mutex_unlock(&iscsilun
->mutex
);
379 iscsi_process_write(void *arg
)
381 IscsiLun
*iscsilun
= arg
;
382 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
384 qemu_mutex_lock(&iscsilun
->mutex
);
385 iscsi_service(iscsi
, POLLOUT
);
386 iscsi_set_events(iscsilun
);
387 qemu_mutex_unlock(&iscsilun
->mutex
);
390 static int64_t sector_lun2qemu(int64_t sector
, IscsiLun
*iscsilun
)
392 return sector
* iscsilun
->block_size
/ BDRV_SECTOR_SIZE
;
395 static int64_t sector_qemu2lun(int64_t sector
, IscsiLun
*iscsilun
)
397 return sector
* BDRV_SECTOR_SIZE
/ iscsilun
->block_size
;
400 static bool is_byte_request_lun_aligned(int64_t offset
, int count
,
403 if (offset
% iscsilun
->block_size
|| count
% iscsilun
->block_size
) {
404 error_report("iSCSI misaligned request: "
405 "iscsilun->block_size %u, offset %" PRIi64
407 iscsilun
->block_size
, offset
, count
);
413 static bool is_sector_request_lun_aligned(int64_t sector_num
, int nb_sectors
,
416 assert(nb_sectors
<= BDRV_REQUEST_MAX_SECTORS
);
417 return is_byte_request_lun_aligned(sector_num
<< BDRV_SECTOR_BITS
,
418 nb_sectors
<< BDRV_SECTOR_BITS
,
422 static void iscsi_allocmap_free(IscsiLun
*iscsilun
)
424 g_free(iscsilun
->allocmap
);
425 g_free(iscsilun
->allocmap_valid
);
426 iscsilun
->allocmap
= NULL
;
427 iscsilun
->allocmap_valid
= NULL
;
431 static int iscsi_allocmap_init(IscsiLun
*iscsilun
, int open_flags
)
433 iscsi_allocmap_free(iscsilun
);
435 assert(iscsilun
->cluster_size
);
436 iscsilun
->allocmap_size
=
437 DIV_ROUND_UP(iscsilun
->num_blocks
* iscsilun
->block_size
,
438 iscsilun
->cluster_size
);
440 iscsilun
->allocmap
= bitmap_try_new(iscsilun
->allocmap_size
);
441 if (!iscsilun
->allocmap
) {
445 if (open_flags
& BDRV_O_NOCACHE
) {
446 /* when cache.direct = on all allocmap entries are
447 * treated as invalid to force a relookup of the block
448 * status on every read request */
452 iscsilun
->allocmap_valid
= bitmap_try_new(iscsilun
->allocmap_size
);
453 if (!iscsilun
->allocmap_valid
) {
454 /* if we are under memory pressure free the allocmap as well */
455 iscsi_allocmap_free(iscsilun
);
463 iscsi_allocmap_update(IscsiLun
*iscsilun
, int64_t offset
,
464 int64_t bytes
, bool allocated
, bool valid
)
466 int64_t cl_num_expanded
, nb_cls_expanded
, cl_num_shrunk
, nb_cls_shrunk
;
468 if (iscsilun
->allocmap
== NULL
) {
471 /* expand to entirely contain all affected clusters */
472 assert(iscsilun
->cluster_size
);
473 cl_num_expanded
= offset
/ iscsilun
->cluster_size
;
474 nb_cls_expanded
= DIV_ROUND_UP(offset
+ bytes
,
475 iscsilun
->cluster_size
) - cl_num_expanded
;
476 /* shrink to touch only completely contained clusters */
477 cl_num_shrunk
= DIV_ROUND_UP(offset
, iscsilun
->cluster_size
);
478 nb_cls_shrunk
= (offset
+ bytes
) / iscsilun
->cluster_size
- cl_num_shrunk
;
480 bitmap_set(iscsilun
->allocmap
, cl_num_expanded
, nb_cls_expanded
);
482 if (nb_cls_shrunk
> 0) {
483 bitmap_clear(iscsilun
->allocmap
, cl_num_shrunk
, nb_cls_shrunk
);
487 if (iscsilun
->allocmap_valid
== NULL
) {
491 if (nb_cls_shrunk
> 0) {
492 bitmap_set(iscsilun
->allocmap_valid
, cl_num_shrunk
, nb_cls_shrunk
);
495 bitmap_clear(iscsilun
->allocmap_valid
, cl_num_expanded
,
501 iscsi_allocmap_set_allocated(IscsiLun
*iscsilun
, int64_t offset
,
504 iscsi_allocmap_update(iscsilun
, offset
, bytes
, true, true);
508 iscsi_allocmap_set_unallocated(IscsiLun
*iscsilun
, int64_t offset
,
511 /* Note: if cache.direct=on the fifth argument to iscsi_allocmap_update
512 * is ignored, so this will in effect be an iscsi_allocmap_set_invalid.
514 iscsi_allocmap_update(iscsilun
, offset
, bytes
, false, true);
517 static void iscsi_allocmap_set_invalid(IscsiLun
*iscsilun
, int64_t offset
,
520 iscsi_allocmap_update(iscsilun
, offset
, bytes
, false, false);
523 static void iscsi_allocmap_invalidate(IscsiLun
*iscsilun
)
525 if (iscsilun
->allocmap
) {
526 bitmap_zero(iscsilun
->allocmap
, iscsilun
->allocmap_size
);
528 if (iscsilun
->allocmap_valid
) {
529 bitmap_zero(iscsilun
->allocmap_valid
, iscsilun
->allocmap_size
);
534 iscsi_allocmap_is_allocated(IscsiLun
*iscsilun
, int64_t offset
,
538 if (iscsilun
->allocmap
== NULL
) {
541 assert(iscsilun
->cluster_size
);
542 size
= DIV_ROUND_UP(offset
+ bytes
, iscsilun
->cluster_size
);
543 return !(find_next_bit(iscsilun
->allocmap
, size
,
544 offset
/ iscsilun
->cluster_size
) == size
);
547 static inline bool iscsi_allocmap_is_valid(IscsiLun
*iscsilun
,
548 int64_t offset
, int64_t bytes
)
551 if (iscsilun
->allocmap_valid
== NULL
) {
554 assert(iscsilun
->cluster_size
);
555 size
= DIV_ROUND_UP(offset
+ bytes
, iscsilun
->cluster_size
);
556 return (find_next_zero_bit(iscsilun
->allocmap_valid
, size
,
557 offset
/ iscsilun
->cluster_size
) == size
);
560 static void coroutine_fn
iscsi_co_wait_for_task(IscsiTask
*iTask
,
563 while (!iTask
->complete
) {
564 iscsi_set_events(iscsilun
);
565 qemu_mutex_unlock(&iscsilun
->mutex
);
566 qemu_coroutine_yield();
567 qemu_mutex_lock(&iscsilun
->mutex
);
571 static int coroutine_fn
572 iscsi_co_writev(BlockDriverState
*bs
, int64_t sector_num
, int nb_sectors
,
573 QEMUIOVector
*iov
, int flags
)
575 IscsiLun
*iscsilun
= bs
->opaque
;
576 struct IscsiTask iTask
;
578 uint32_t num_sectors
;
579 bool fua
= flags
& BDRV_REQ_FUA
;
583 assert(iscsilun
->dpofua
);
585 if (!is_sector_request_lun_aligned(sector_num
, nb_sectors
, iscsilun
)) {
589 if (bs
->bl
.max_transfer
) {
590 assert(nb_sectors
<< BDRV_SECTOR_BITS
<= bs
->bl
.max_transfer
);
593 lba
= sector_qemu2lun(sector_num
, iscsilun
);
594 num_sectors
= sector_qemu2lun(nb_sectors
, iscsilun
);
595 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
596 qemu_mutex_lock(&iscsilun
->mutex
);
598 if (iscsilun
->use_16_for_rw
) {
599 #if LIBISCSI_API_VERSION >= (20160603)
600 iTask
.task
= iscsi_write16_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
601 NULL
, num_sectors
* iscsilun
->block_size
,
602 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
603 iscsi_co_generic_cb
, &iTask
,
604 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
606 iTask
.task
= iscsi_write10_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
607 NULL
, num_sectors
* iscsilun
->block_size
,
608 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
609 iscsi_co_generic_cb
, &iTask
,
610 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
613 iTask
.task
= iscsi_write16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
614 NULL
, num_sectors
* iscsilun
->block_size
,
615 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
616 iscsi_co_generic_cb
, &iTask
);
618 iTask
.task
= iscsi_write10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
619 NULL
, num_sectors
* iscsilun
->block_size
,
620 iscsilun
->block_size
, 0, 0, fua
, 0, 0,
621 iscsi_co_generic_cb
, &iTask
);
624 if (iTask
.task
== NULL
) {
625 qemu_mutex_unlock(&iscsilun
->mutex
);
628 #if LIBISCSI_API_VERSION < (20160603)
629 scsi_task_set_iov_out(iTask
.task
, (struct scsi_iovec
*) iov
->iov
,
632 iscsi_co_wait_for_task(&iTask
, iscsilun
);
634 if (iTask
.task
!= NULL
) {
635 scsi_free_scsi_task(iTask
.task
);
639 if (iTask
.do_retry
) {
644 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
645 iscsi_allocmap_set_invalid(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
646 nb_sectors
* BDRV_SECTOR_SIZE
);
647 error_report("iSCSI WRITE10/16 failed at lba %" PRIu64
": %s", lba
,
653 iscsi_allocmap_set_allocated(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
654 nb_sectors
* BDRV_SECTOR_SIZE
);
657 qemu_mutex_unlock(&iscsilun
->mutex
);
658 g_free(iTask
.err_str
);
664 static int coroutine_fn
iscsi_co_block_status(BlockDriverState
*bs
,
665 bool want_zero
, int64_t offset
,
666 int64_t bytes
, int64_t *pnum
,
668 BlockDriverState
**file
)
670 IscsiLun
*iscsilun
= bs
->opaque
;
671 struct scsi_get_lba_status
*lbas
= NULL
;
672 struct scsi_lba_status_descriptor
*lbasd
= NULL
;
673 struct IscsiTask iTask
;
677 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
679 assert(QEMU_IS_ALIGNED(offset
| bytes
, iscsilun
->block_size
));
681 /* default to all sectors allocated */
682 ret
= BDRV_BLOCK_DATA
| BDRV_BLOCK_OFFSET_VALID
;
688 /* LUN does not support logical block provisioning */
689 if (!iscsilun
->lbpme
) {
693 lba
= offset
/ iscsilun
->block_size
;
695 qemu_mutex_lock(&iscsilun
->mutex
);
697 if (iscsi_get_lba_status_task(iscsilun
->iscsi
, iscsilun
->lun
,
698 lba
, 8 + 16, iscsi_co_generic_cb
,
703 iscsi_co_wait_for_task(&iTask
, iscsilun
);
705 if (iTask
.do_retry
) {
706 if (iTask
.task
!= NULL
) {
707 scsi_free_scsi_task(iTask
.task
);
714 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
715 /* in case the get_lba_status_callout fails (i.e.
716 * because the device is busy or the cmd is not
717 * supported) we pretend all blocks are allocated
718 * for backwards compatibility */
719 error_report("iSCSI GET_LBA_STATUS failed at lba %" PRIu64
": %s",
724 lbas
= scsi_datain_unmarshall(iTask
.task
);
730 lbasd
= &lbas
->descriptors
[0];
732 if (lba
!= lbasd
->lba
) {
737 *pnum
= lbasd
->num_blocks
* iscsilun
->block_size
;
739 if (lbasd
->provisioning
== SCSI_PROVISIONING_TYPE_DEALLOCATED
||
740 lbasd
->provisioning
== SCSI_PROVISIONING_TYPE_ANCHORED
) {
741 ret
&= ~BDRV_BLOCK_DATA
;
742 if (iscsilun
->lbprz
) {
743 ret
|= BDRV_BLOCK_ZERO
;
747 if (ret
& BDRV_BLOCK_ZERO
) {
748 iscsi_allocmap_set_unallocated(iscsilun
, offset
, *pnum
);
750 iscsi_allocmap_set_allocated(iscsilun
, offset
, *pnum
);
757 qemu_mutex_unlock(&iscsilun
->mutex
);
758 g_free(iTask
.err_str
);
760 if (iTask
.task
!= NULL
) {
761 scsi_free_scsi_task(iTask
.task
);
763 if (ret
> 0 && ret
& BDRV_BLOCK_OFFSET_VALID
&& file
) {
769 static int coroutine_fn
iscsi_co_readv(BlockDriverState
*bs
,
770 int64_t sector_num
, int nb_sectors
,
773 IscsiLun
*iscsilun
= bs
->opaque
;
774 struct IscsiTask iTask
;
776 uint32_t num_sectors
;
779 if (!is_sector_request_lun_aligned(sector_num
, nb_sectors
, iscsilun
)) {
783 if (bs
->bl
.max_transfer
) {
784 assert(nb_sectors
<< BDRV_SECTOR_BITS
<= bs
->bl
.max_transfer
);
787 /* if cache.direct is off and we have a valid entry in our allocation map
788 * we can skip checking the block status and directly return zeroes if
789 * the request falls within an unallocated area */
790 if (iscsi_allocmap_is_valid(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
791 nb_sectors
* BDRV_SECTOR_SIZE
) &&
792 !iscsi_allocmap_is_allocated(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
793 nb_sectors
* BDRV_SECTOR_SIZE
)) {
794 qemu_iovec_memset(iov
, 0, 0x00, iov
->size
);
798 if (nb_sectors
>= ISCSI_CHECKALLOC_THRES
&&
799 !iscsi_allocmap_is_valid(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
800 nb_sectors
* BDRV_SECTOR_SIZE
) &&
801 !iscsi_allocmap_is_allocated(iscsilun
, sector_num
* BDRV_SECTOR_SIZE
,
802 nb_sectors
* BDRV_SECTOR_SIZE
)) {
804 /* check the block status from the beginning of the cluster
805 * containing the start sector */
809 assert(iscsilun
->cluster_size
);
810 head
= (sector_num
* BDRV_SECTOR_SIZE
) % iscsilun
->cluster_size
;
811 ret
= iscsi_co_block_status(bs
, true,
812 sector_num
* BDRV_SECTOR_SIZE
- head
,
813 BDRV_REQUEST_MAX_BYTES
, &pnum
, NULL
, NULL
);
817 /* if the whole request falls into an unallocated area we can avoid
818 * reading and directly return zeroes instead */
819 if (ret
& BDRV_BLOCK_ZERO
&&
820 pnum
>= nb_sectors
* BDRV_SECTOR_SIZE
+ head
) {
821 qemu_iovec_memset(iov
, 0, 0x00, iov
->size
);
826 lba
= sector_qemu2lun(sector_num
, iscsilun
);
827 num_sectors
= sector_qemu2lun(nb_sectors
, iscsilun
);
829 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
830 qemu_mutex_lock(&iscsilun
->mutex
);
832 if (iscsilun
->use_16_for_rw
) {
833 #if LIBISCSI_API_VERSION >= (20160603)
834 iTask
.task
= iscsi_read16_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
835 num_sectors
* iscsilun
->block_size
,
836 iscsilun
->block_size
, 0, 0, 0, 0, 0,
837 iscsi_co_generic_cb
, &iTask
,
838 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
840 iTask
.task
= iscsi_read10_iov_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
841 num_sectors
* iscsilun
->block_size
,
842 iscsilun
->block_size
,
844 iscsi_co_generic_cb
, &iTask
,
845 (struct scsi_iovec
*)iov
->iov
, iov
->niov
);
848 iTask
.task
= iscsi_read16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
849 num_sectors
* iscsilun
->block_size
,
850 iscsilun
->block_size
, 0, 0, 0, 0, 0,
851 iscsi_co_generic_cb
, &iTask
);
853 iTask
.task
= iscsi_read10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
854 num_sectors
* iscsilun
->block_size
,
855 iscsilun
->block_size
,
857 iscsi_co_generic_cb
, &iTask
);
860 if (iTask
.task
== NULL
) {
861 qemu_mutex_unlock(&iscsilun
->mutex
);
864 #if LIBISCSI_API_VERSION < (20160603)
865 scsi_task_set_iov_in(iTask
.task
, (struct scsi_iovec
*) iov
->iov
, iov
->niov
);
868 iscsi_co_wait_for_task(&iTask
, iscsilun
);
869 if (iTask
.task
!= NULL
) {
870 scsi_free_scsi_task(iTask
.task
);
874 if (iTask
.do_retry
) {
879 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
880 error_report("iSCSI READ10/16 failed at lba %" PRIu64
": %s",
885 qemu_mutex_unlock(&iscsilun
->mutex
);
886 g_free(iTask
.err_str
);
890 static int coroutine_fn
iscsi_co_flush(BlockDriverState
*bs
)
892 IscsiLun
*iscsilun
= bs
->opaque
;
893 struct IscsiTask iTask
;
896 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
897 qemu_mutex_lock(&iscsilun
->mutex
);
899 if (iscsi_synchronizecache10_task(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0, 0,
900 0, iscsi_co_generic_cb
, &iTask
) == NULL
) {
901 qemu_mutex_unlock(&iscsilun
->mutex
);
905 iscsi_co_wait_for_task(&iTask
, iscsilun
);
907 if (iTask
.task
!= NULL
) {
908 scsi_free_scsi_task(iTask
.task
);
912 if (iTask
.do_retry
) {
917 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
918 error_report("iSCSI SYNCHRONIZECACHE10 failed: %s", iTask
.err_str
);
922 qemu_mutex_unlock(&iscsilun
->mutex
);
923 g_free(iTask
.err_str
);
928 /* Called (via iscsi_service) with QemuMutex held. */
930 iscsi_aio_ioctl_cb(struct iscsi_context
*iscsi
, int status
,
931 void *command_data
, void *opaque
)
933 IscsiAIOCB
*acb
= opaque
;
940 error_report("Failed to ioctl(SG_IO) to iSCSI lun. %s",
941 iscsi_get_error(iscsi
));
942 acb
->status
= iscsi_translate_sense(&acb
->task
->sense
);
945 acb
->ioh
->driver_status
= 0;
946 acb
->ioh
->host_status
= 0;
948 acb
->ioh
->status
= status
;
950 #define SG_ERR_DRIVER_SENSE 0x08
952 if (status
== SCSI_STATUS_CHECK_CONDITION
&& acb
->task
->datain
.size
>= 2) {
955 acb
->ioh
->driver_status
|= SG_ERR_DRIVER_SENSE
;
957 acb
->ioh
->sb_len_wr
= acb
->task
->datain
.size
- 2;
958 ss
= (acb
->ioh
->mx_sb_len
>= acb
->ioh
->sb_len_wr
) ?
959 acb
->ioh
->mx_sb_len
: acb
->ioh
->sb_len_wr
;
960 memcpy(acb
->ioh
->sbp
, &acb
->task
->datain
.data
[2], ss
);
963 iscsi_schedule_bh(acb
);
966 static void iscsi_ioctl_bh_completion(void *opaque
)
968 IscsiAIOCB
*acb
= opaque
;
970 qemu_bh_delete(acb
->bh
);
971 acb
->common
.cb(acb
->common
.opaque
, acb
->ret
);
975 static void iscsi_ioctl_handle_emulated(IscsiAIOCB
*acb
, int req
, void *buf
)
977 BlockDriverState
*bs
= acb
->common
.bs
;
978 IscsiLun
*iscsilun
= bs
->opaque
;
982 case SG_GET_VERSION_NUM
:
986 ((struct sg_scsi_id
*)buf
)->scsi_type
= iscsilun
->type
;
992 acb
->bh
= aio_bh_new(bdrv_get_aio_context(bs
),
993 iscsi_ioctl_bh_completion
, acb
);
995 qemu_bh_schedule(acb
->bh
);
998 static BlockAIOCB
*iscsi_aio_ioctl(BlockDriverState
*bs
,
999 unsigned long int req
, void *buf
,
1000 BlockCompletionFunc
*cb
, void *opaque
)
1002 IscsiLun
*iscsilun
= bs
->opaque
;
1003 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
1004 struct iscsi_data data
;
1007 acb
= qemu_aio_get(&iscsi_aiocb_info
, bs
, cb
, opaque
);
1009 acb
->iscsilun
= iscsilun
;
1011 acb
->status
= -EINPROGRESS
;
1016 iscsi_ioctl_handle_emulated(acb
, req
, buf
);
1017 return &acb
->common
;
1020 if (acb
->ioh
->cmd_len
> SCSI_CDB_MAX_SIZE
) {
1021 error_report("iSCSI: ioctl error CDB exceeds max size (%d > %d)",
1022 acb
->ioh
->cmd_len
, SCSI_CDB_MAX_SIZE
);
1023 qemu_aio_unref(acb
);
1027 acb
->task
= malloc(sizeof(struct scsi_task
));
1028 if (acb
->task
== NULL
) {
1029 error_report("iSCSI: Failed to allocate task for scsi command. %s",
1030 iscsi_get_error(iscsi
));
1031 qemu_aio_unref(acb
);
1034 memset(acb
->task
, 0, sizeof(struct scsi_task
));
1036 switch (acb
->ioh
->dxfer_direction
) {
1037 case SG_DXFER_TO_DEV
:
1038 acb
->task
->xfer_dir
= SCSI_XFER_WRITE
;
1040 case SG_DXFER_FROM_DEV
:
1041 acb
->task
->xfer_dir
= SCSI_XFER_READ
;
1044 acb
->task
->xfer_dir
= SCSI_XFER_NONE
;
1048 acb
->task
->cdb_size
= acb
->ioh
->cmd_len
;
1049 memcpy(&acb
->task
->cdb
[0], acb
->ioh
->cmdp
, acb
->ioh
->cmd_len
);
1050 acb
->task
->expxferlen
= acb
->ioh
->dxfer_len
;
1053 qemu_mutex_lock(&iscsilun
->mutex
);
1054 if (acb
->task
->xfer_dir
== SCSI_XFER_WRITE
) {
1055 if (acb
->ioh
->iovec_count
== 0) {
1056 data
.data
= acb
->ioh
->dxferp
;
1057 data
.size
= acb
->ioh
->dxfer_len
;
1059 scsi_task_set_iov_out(acb
->task
,
1060 (struct scsi_iovec
*) acb
->ioh
->dxferp
,
1061 acb
->ioh
->iovec_count
);
1065 if (iscsi_scsi_command_async(iscsi
, iscsilun
->lun
, acb
->task
,
1067 (data
.size
> 0) ? &data
: NULL
,
1069 qemu_mutex_unlock(&iscsilun
->mutex
);
1070 scsi_free_scsi_task(acb
->task
);
1071 qemu_aio_unref(acb
);
1075 /* tell libiscsi to read straight into the buffer we got from ioctl */
1076 if (acb
->task
->xfer_dir
== SCSI_XFER_READ
) {
1077 if (acb
->ioh
->iovec_count
== 0) {
1078 scsi_task_add_data_in_buffer(acb
->task
,
1079 acb
->ioh
->dxfer_len
,
1082 scsi_task_set_iov_in(acb
->task
,
1083 (struct scsi_iovec
*) acb
->ioh
->dxferp
,
1084 acb
->ioh
->iovec_count
);
1088 iscsi_set_events(iscsilun
);
1089 qemu_mutex_unlock(&iscsilun
->mutex
);
1091 return &acb
->common
;
1097 iscsi_getlength(BlockDriverState
*bs
)
1099 IscsiLun
*iscsilun
= bs
->opaque
;
1102 len
= iscsilun
->num_blocks
;
1103 len
*= iscsilun
->block_size
;
1109 coroutine_fn
iscsi_co_pdiscard(BlockDriverState
*bs
, int64_t offset
, int bytes
)
1111 IscsiLun
*iscsilun
= bs
->opaque
;
1112 struct IscsiTask iTask
;
1113 struct unmap_list list
;
1116 if (!is_byte_request_lun_aligned(offset
, bytes
, iscsilun
)) {
1120 if (!iscsilun
->lbp
.lbpu
) {
1121 /* UNMAP is not supported by the target */
1125 list
.lba
= offset
/ iscsilun
->block_size
;
1126 list
.num
= bytes
/ iscsilun
->block_size
;
1128 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
1129 qemu_mutex_lock(&iscsilun
->mutex
);
1131 if (iscsi_unmap_task(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0, &list
, 1,
1132 iscsi_co_generic_cb
, &iTask
) == NULL
) {
1137 iscsi_co_wait_for_task(&iTask
, iscsilun
);
1139 if (iTask
.task
!= NULL
) {
1140 scsi_free_scsi_task(iTask
.task
);
1144 if (iTask
.do_retry
) {
1149 iscsi_allocmap_set_invalid(iscsilun
, offset
, bytes
);
1151 if (iTask
.status
== SCSI_STATUS_CHECK_CONDITION
) {
1152 /* the target might fail with a check condition if it
1153 is not happy with the alignment of the UNMAP request
1154 we silently fail in this case */
1158 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
1159 error_report("iSCSI UNMAP failed at lba %" PRIu64
": %s",
1160 list
.lba
, iTask
.err_str
);
1166 qemu_mutex_unlock(&iscsilun
->mutex
);
1167 g_free(iTask
.err_str
);
1172 coroutine_fn
iscsi_co_pwrite_zeroes(BlockDriverState
*bs
, int64_t offset
,
1173 int bytes
, BdrvRequestFlags flags
)
1175 IscsiLun
*iscsilun
= bs
->opaque
;
1176 struct IscsiTask iTask
;
1179 bool use_16_for_ws
= iscsilun
->use_16_for_rw
;
1182 if (!is_byte_request_lun_aligned(offset
, bytes
, iscsilun
)) {
1186 if (flags
& BDRV_REQ_MAY_UNMAP
) {
1187 if (!use_16_for_ws
&& !iscsilun
->lbp
.lbpws10
) {
1188 /* WRITESAME10 with UNMAP is unsupported try WRITESAME16 */
1189 use_16_for_ws
= true;
1191 if (use_16_for_ws
&& !iscsilun
->lbp
.lbpws
) {
1192 /* WRITESAME16 with UNMAP is not supported by the target,
1193 * fall back and try WRITESAME10/16 without UNMAP */
1194 flags
&= ~BDRV_REQ_MAY_UNMAP
;
1195 use_16_for_ws
= iscsilun
->use_16_for_rw
;
1199 if (!(flags
& BDRV_REQ_MAY_UNMAP
) && !iscsilun
->has_write_same
) {
1200 /* WRITESAME without UNMAP is not supported by the target */
1204 lba
= offset
/ iscsilun
->block_size
;
1205 nb_blocks
= bytes
/ iscsilun
->block_size
;
1207 if (iscsilun
->zeroblock
== NULL
) {
1208 iscsilun
->zeroblock
= g_try_malloc0(iscsilun
->block_size
);
1209 if (iscsilun
->zeroblock
== NULL
) {
1214 qemu_mutex_lock(&iscsilun
->mutex
);
1215 iscsi_co_init_iscsitask(iscsilun
, &iTask
);
1217 if (use_16_for_ws
) {
1218 iTask
.task
= iscsi_writesame16_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
1219 iscsilun
->zeroblock
, iscsilun
->block_size
,
1220 nb_blocks
, 0, !!(flags
& BDRV_REQ_MAY_UNMAP
),
1221 0, 0, iscsi_co_generic_cb
, &iTask
);
1223 iTask
.task
= iscsi_writesame10_task(iscsilun
->iscsi
, iscsilun
->lun
, lba
,
1224 iscsilun
->zeroblock
, iscsilun
->block_size
,
1225 nb_blocks
, 0, !!(flags
& BDRV_REQ_MAY_UNMAP
),
1226 0, 0, iscsi_co_generic_cb
, &iTask
);
1228 if (iTask
.task
== NULL
) {
1229 qemu_mutex_unlock(&iscsilun
->mutex
);
1233 iscsi_co_wait_for_task(&iTask
, iscsilun
);
1235 if (iTask
.status
== SCSI_STATUS_CHECK_CONDITION
&&
1236 iTask
.task
->sense
.key
== SCSI_SENSE_ILLEGAL_REQUEST
&&
1237 (iTask
.task
->sense
.ascq
== SCSI_SENSE_ASCQ_INVALID_OPERATION_CODE
||
1238 iTask
.task
->sense
.ascq
== SCSI_SENSE_ASCQ_INVALID_FIELD_IN_CDB
)) {
1239 /* WRITE SAME is not supported by the target */
1240 iscsilun
->has_write_same
= false;
1241 scsi_free_scsi_task(iTask
.task
);
1246 if (iTask
.task
!= NULL
) {
1247 scsi_free_scsi_task(iTask
.task
);
1251 if (iTask
.do_retry
) {
1256 if (iTask
.status
!= SCSI_STATUS_GOOD
) {
1257 iscsi_allocmap_set_invalid(iscsilun
, offset
, bytes
);
1258 error_report("iSCSI WRITESAME10/16 failed at lba %" PRIu64
": %s",
1259 lba
, iTask
.err_str
);
1264 if (flags
& BDRV_REQ_MAY_UNMAP
) {
1265 iscsi_allocmap_set_invalid(iscsilun
, offset
, bytes
);
1267 iscsi_allocmap_set_allocated(iscsilun
, offset
, bytes
);
1271 qemu_mutex_unlock(&iscsilun
->mutex
);
1272 g_free(iTask
.err_str
);
1276 static void apply_chap(struct iscsi_context
*iscsi
, QemuOpts
*opts
,
1279 const char *user
= NULL
;
1280 const char *password
= NULL
;
1281 const char *secretid
;
1282 char *secret
= NULL
;
1284 user
= qemu_opt_get(opts
, "user");
1289 secretid
= qemu_opt_get(opts
, "password-secret");
1290 password
= qemu_opt_get(opts
, "password");
1291 if (secretid
&& password
) {
1292 error_setg(errp
, "'password' and 'password-secret' properties are "
1293 "mutually exclusive");
1297 secret
= qcrypto_secret_lookup_as_utf8(secretid
, errp
);
1302 } else if (!password
) {
1303 error_setg(errp
, "CHAP username specified but no password was given");
1307 if (iscsi_set_initiator_username_pwd(iscsi
, user
, password
)) {
1308 error_setg(errp
, "Failed to set initiator username and password");
1314 static void apply_header_digest(struct iscsi_context
*iscsi
, QemuOpts
*opts
,
1317 const char *digest
= NULL
;
1319 digest
= qemu_opt_get(opts
, "header-digest");
1321 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE_CRC32C
);
1322 } else if (!strcmp(digest
, "crc32c")) {
1323 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_CRC32C
);
1324 } else if (!strcmp(digest
, "none")) {
1325 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE
);
1326 } else if (!strcmp(digest
, "crc32c-none")) {
1327 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_CRC32C_NONE
);
1328 } else if (!strcmp(digest
, "none-crc32c")) {
1329 iscsi_set_header_digest(iscsi
, ISCSI_HEADER_DIGEST_NONE_CRC32C
);
1331 error_setg(errp
, "Invalid header-digest setting : %s", digest
);
1335 static char *get_initiator_name(QemuOpts
*opts
)
1339 UuidInfo
*uuid_info
;
1341 name
= qemu_opt_get(opts
, "initiator-name");
1343 return g_strdup(name
);
1346 uuid_info
= qmp_query_uuid(NULL
);
1347 if (strcmp(uuid_info
->UUID
, UUID_NONE
) == 0) {
1348 name
= qemu_get_vm_name();
1350 name
= uuid_info
->UUID
;
1352 iscsi_name
= g_strdup_printf("iqn.2008-11.org.linux-kvm%s%s",
1353 name
? ":" : "", name
? name
: "");
1354 qapi_free_UuidInfo(uuid_info
);
1358 static void iscsi_nop_timed_event(void *opaque
)
1360 IscsiLun
*iscsilun
= opaque
;
1362 qemu_mutex_lock(&iscsilun
->mutex
);
1363 if (iscsi_get_nops_in_flight(iscsilun
->iscsi
) >= MAX_NOP_FAILURES
) {
1364 error_report("iSCSI: NOP timeout. Reconnecting...");
1365 iscsilun
->request_timed_out
= true;
1366 } else if (iscsi_nop_out_async(iscsilun
->iscsi
, NULL
, NULL
, 0, NULL
) != 0) {
1367 error_report("iSCSI: failed to sent NOP-Out. Disabling NOP messages.");
1371 timer_mod(iscsilun
->nop_timer
, qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + NOP_INTERVAL
);
1372 iscsi_set_events(iscsilun
);
1375 qemu_mutex_unlock(&iscsilun
->mutex
);
1378 static void iscsi_readcapacity_sync(IscsiLun
*iscsilun
, Error
**errp
)
1380 struct scsi_task
*task
= NULL
;
1381 struct scsi_readcapacity10
*rc10
= NULL
;
1382 struct scsi_readcapacity16
*rc16
= NULL
;
1383 int retries
= ISCSI_CMD_RETRIES
;
1387 scsi_free_scsi_task(task
);
1391 switch (iscsilun
->type
) {
1393 task
= iscsi_readcapacity16_sync(iscsilun
->iscsi
, iscsilun
->lun
);
1394 if (task
!= NULL
&& task
->status
== SCSI_STATUS_GOOD
) {
1395 rc16
= scsi_datain_unmarshall(task
);
1397 error_setg(errp
, "iSCSI: Failed to unmarshall readcapacity16 data.");
1399 iscsilun
->block_size
= rc16
->block_length
;
1400 iscsilun
->num_blocks
= rc16
->returned_lba
+ 1;
1401 iscsilun
->lbpme
= !!rc16
->lbpme
;
1402 iscsilun
->lbprz
= !!rc16
->lbprz
;
1403 iscsilun
->use_16_for_rw
= (rc16
->returned_lba
> 0xffffffff);
1407 if (task
!= NULL
&& task
->status
== SCSI_STATUS_CHECK_CONDITION
1408 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
) {
1411 /* Fall through and try READ CAPACITY(10) instead. */
1413 task
= iscsi_readcapacity10_sync(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0);
1414 if (task
!= NULL
&& task
->status
== SCSI_STATUS_GOOD
) {
1415 rc10
= scsi_datain_unmarshall(task
);
1417 error_setg(errp
, "iSCSI: Failed to unmarshall readcapacity10 data.");
1419 iscsilun
->block_size
= rc10
->block_size
;
1420 if (rc10
->lba
== 0) {
1421 /* blank disk loaded */
1422 iscsilun
->num_blocks
= 0;
1424 iscsilun
->num_blocks
= rc10
->lba
+ 1;
1432 } while (task
!= NULL
&& task
->status
== SCSI_STATUS_CHECK_CONDITION
1433 && task
->sense
.key
== SCSI_SENSE_UNIT_ATTENTION
1436 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1437 error_setg(errp
, "iSCSI: failed to send readcapacity10/16 command");
1438 } else if (!iscsilun
->block_size
||
1439 iscsilun
->block_size
% BDRV_SECTOR_SIZE
) {
1440 error_setg(errp
, "iSCSI: the target returned an invalid "
1441 "block size of %d.", iscsilun
->block_size
);
1444 scsi_free_scsi_task(task
);
1448 static struct scsi_task
*iscsi_do_inquiry(struct iscsi_context
*iscsi
, int lun
,
1449 int evpd
, int pc
, void **inq
, Error
**errp
)
1452 struct scsi_task
*task
= NULL
;
1453 task
= iscsi_inquiry_sync(iscsi
, lun
, evpd
, pc
, 64);
1454 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1457 full_size
= scsi_datain_getfullsize(task
);
1458 if (full_size
> task
->datain
.size
) {
1459 scsi_free_scsi_task(task
);
1461 /* we need more data for the full list */
1462 task
= iscsi_inquiry_sync(iscsi
, lun
, evpd
, pc
, full_size
);
1463 if (task
== NULL
|| task
->status
!= SCSI_STATUS_GOOD
) {
1468 *inq
= scsi_datain_unmarshall(task
);
1470 error_setg(errp
, "iSCSI: failed to unmarshall inquiry datain blob");
1477 error_setg(errp
, "iSCSI: Inquiry command failed : %s",
1478 iscsi_get_error(iscsi
));
1481 scsi_free_scsi_task(task
);
1486 static void iscsi_detach_aio_context(BlockDriverState
*bs
)
1488 IscsiLun
*iscsilun
= bs
->opaque
;
1490 aio_set_fd_handler(iscsilun
->aio_context
, iscsi_get_fd(iscsilun
->iscsi
),
1491 false, NULL
, NULL
, NULL
, NULL
);
1492 iscsilun
->events
= 0;
1494 if (iscsilun
->nop_timer
) {
1495 timer_del(iscsilun
->nop_timer
);
1496 timer_free(iscsilun
->nop_timer
);
1497 iscsilun
->nop_timer
= NULL
;
1499 if (iscsilun
->event_timer
) {
1500 timer_del(iscsilun
->event_timer
);
1501 timer_free(iscsilun
->event_timer
);
1502 iscsilun
->event_timer
= NULL
;
1506 static void iscsi_attach_aio_context(BlockDriverState
*bs
,
1507 AioContext
*new_context
)
1509 IscsiLun
*iscsilun
= bs
->opaque
;
1511 iscsilun
->aio_context
= new_context
;
1512 iscsi_set_events(iscsilun
);
1514 /* Set up a timer for sending out iSCSI NOPs */
1515 iscsilun
->nop_timer
= aio_timer_new(iscsilun
->aio_context
,
1516 QEMU_CLOCK_REALTIME
, SCALE_MS
,
1517 iscsi_nop_timed_event
, iscsilun
);
1518 timer_mod(iscsilun
->nop_timer
,
1519 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + NOP_INTERVAL
);
1521 /* Set up a timer for periodic calls to iscsi_set_events and to
1522 * scan for command timeout */
1523 iscsilun
->event_timer
= aio_timer_new(iscsilun
->aio_context
,
1524 QEMU_CLOCK_REALTIME
, SCALE_MS
,
1525 iscsi_timed_check_events
, iscsilun
);
1526 timer_mod(iscsilun
->event_timer
,
1527 qemu_clock_get_ms(QEMU_CLOCK_REALTIME
) + EVENT_INTERVAL
);
1530 static void iscsi_modesense_sync(IscsiLun
*iscsilun
)
1532 struct scsi_task
*task
;
1533 struct scsi_mode_sense
*ms
= NULL
;
1534 iscsilun
->write_protected
= false;
1535 iscsilun
->dpofua
= false;
1537 task
= iscsi_modesense6_sync(iscsilun
->iscsi
, iscsilun
->lun
,
1538 1, SCSI_MODESENSE_PC_CURRENT
,
1541 error_report("iSCSI: Failed to send MODE_SENSE(6) command: %s",
1542 iscsi_get_error(iscsilun
->iscsi
));
1546 if (task
->status
!= SCSI_STATUS_GOOD
) {
1547 error_report("iSCSI: Failed MODE_SENSE(6), LUN assumed writable");
1550 ms
= scsi_datain_unmarshall(task
);
1552 error_report("iSCSI: Failed to unmarshall MODE_SENSE(6) data: %s",
1553 iscsi_get_error(iscsilun
->iscsi
));
1556 iscsilun
->write_protected
= ms
->device_specific_parameter
& 0x80;
1557 iscsilun
->dpofua
= ms
->device_specific_parameter
& 0x10;
1561 scsi_free_scsi_task(task
);
1565 static void iscsi_parse_iscsi_option(const char *target
, QDict
*options
)
1569 const char *user
, *password
, *password_secret
, *initiator_name
,
1570 *header_digest
, *timeout
;
1572 list
= qemu_find_opts("iscsi");
1577 opts
= qemu_opts_find(list
, target
);
1579 opts
= QTAILQ_FIRST(&list
->head
);
1585 user
= qemu_opt_get(opts
, "user");
1587 qdict_set_default_str(options
, "user", user
);
1590 password
= qemu_opt_get(opts
, "password");
1592 qdict_set_default_str(options
, "password", password
);
1595 password_secret
= qemu_opt_get(opts
, "password-secret");
1596 if (password_secret
) {
1597 qdict_set_default_str(options
, "password-secret", password_secret
);
1600 initiator_name
= qemu_opt_get(opts
, "initiator-name");
1601 if (initiator_name
) {
1602 qdict_set_default_str(options
, "initiator-name", initiator_name
);
1605 header_digest
= qemu_opt_get(opts
, "header-digest");
1606 if (header_digest
) {
1607 /* -iscsi takes upper case values, but QAPI only supports lower case
1608 * enum constant names, so we have to convert here. */
1609 char *qapi_value
= g_ascii_strdown(header_digest
, -1);
1610 qdict_set_default_str(options
, "header-digest", qapi_value
);
1614 timeout
= qemu_opt_get(opts
, "timeout");
1616 qdict_set_default_str(options
, "timeout", timeout
);
1621 * We support iscsi url's on the form
1622 * iscsi://[<username>%<password>@]<host>[:<port>]/<targetname>/<lun>
1624 static void iscsi_parse_filename(const char *filename
, QDict
*options
,
1627 struct iscsi_url
*iscsi_url
;
1628 const char *transport_name
;
1631 iscsi_url
= iscsi_parse_full_url(NULL
, filename
);
1632 if (iscsi_url
== NULL
) {
1633 error_setg(errp
, "Failed to parse URL : %s", filename
);
1637 #if LIBISCSI_API_VERSION >= (20160603)
1638 switch (iscsi_url
->transport
) {
1640 transport_name
= "tcp";
1642 case ISER_TRANSPORT
:
1643 transport_name
= "iser";
1646 error_setg(errp
, "Unknown transport type (%d)",
1647 iscsi_url
->transport
);
1651 transport_name
= "tcp";
1654 qdict_set_default_str(options
, "transport", transport_name
);
1655 qdict_set_default_str(options
, "portal", iscsi_url
->portal
);
1656 qdict_set_default_str(options
, "target", iscsi_url
->target
);
1658 lun_str
= g_strdup_printf("%d", iscsi_url
->lun
);
1659 qdict_set_default_str(options
, "lun", lun_str
);
1662 /* User/password from -iscsi take precedence over those from the URL */
1663 iscsi_parse_iscsi_option(iscsi_url
->target
, options
);
1665 if (iscsi_url
->user
[0] != '\0') {
1666 qdict_set_default_str(options
, "user", iscsi_url
->user
);
1667 qdict_set_default_str(options
, "password", iscsi_url
->passwd
);
1670 iscsi_destroy_url(iscsi_url
);
1673 static QemuOptsList runtime_opts
= {
1675 .head
= QTAILQ_HEAD_INITIALIZER(runtime_opts
.head
),
1678 .name
= "transport",
1679 .type
= QEMU_OPT_STRING
,
1683 .type
= QEMU_OPT_STRING
,
1687 .type
= QEMU_OPT_STRING
,
1691 .type
= QEMU_OPT_STRING
,
1695 .type
= QEMU_OPT_STRING
,
1698 .name
= "password-secret",
1699 .type
= QEMU_OPT_STRING
,
1703 .type
= QEMU_OPT_NUMBER
,
1706 .name
= "initiator-name",
1707 .type
= QEMU_OPT_STRING
,
1710 .name
= "header-digest",
1711 .type
= QEMU_OPT_STRING
,
1715 .type
= QEMU_OPT_NUMBER
,
1717 { /* end of list */ }
1721 static void iscsi_save_designator(IscsiLun
*lun
,
1722 struct scsi_inquiry_device_identification
*inq_di
)
1724 struct scsi_inquiry_device_designator
*desig
, *copy
= NULL
;
1726 for (desig
= inq_di
->designators
; desig
; desig
= desig
->next
) {
1727 if (desig
->association
||
1728 desig
->designator_type
> SCSI_DESIGNATOR_TYPE_NAA
) {
1731 /* NAA works better than T10 vendor ID based designator. */
1732 if (!copy
|| copy
->designator_type
< desig
->designator_type
) {
1737 lun
->dd
= g_new(struct scsi_inquiry_device_designator
, 1);
1739 lun
->dd
->next
= NULL
;
1740 lun
->dd
->designator
= g_malloc(copy
->designator_length
);
1741 memcpy(lun
->dd
->designator
, copy
->designator
, copy
->designator_length
);
1745 static int iscsi_open(BlockDriverState
*bs
, QDict
*options
, int flags
,
1748 IscsiLun
*iscsilun
= bs
->opaque
;
1749 struct iscsi_context
*iscsi
= NULL
;
1750 struct scsi_task
*task
= NULL
;
1751 struct scsi_inquiry_standard
*inq
= NULL
;
1752 struct scsi_inquiry_supported_pages
*inq_vpd
;
1753 char *initiator_name
= NULL
;
1755 Error
*local_err
= NULL
;
1756 const char *transport_name
, *portal
, *target
;
1757 #if LIBISCSI_API_VERSION >= (20160603)
1758 enum iscsi_transport_type transport
;
1760 int i
, ret
= 0, timeout
= 0, lun
;
1762 opts
= qemu_opts_create(&runtime_opts
, NULL
, 0, &error_abort
);
1763 qemu_opts_absorb_qdict(opts
, options
, &local_err
);
1765 error_propagate(errp
, local_err
);
1770 transport_name
= qemu_opt_get(opts
, "transport");
1771 portal
= qemu_opt_get(opts
, "portal");
1772 target
= qemu_opt_get(opts
, "target");
1773 lun
= qemu_opt_get_number(opts
, "lun", 0);
1775 if (!transport_name
|| !portal
|| !target
) {
1776 error_setg(errp
, "Need all of transport, portal and target options");
1781 if (!strcmp(transport_name
, "tcp")) {
1782 #if LIBISCSI_API_VERSION >= (20160603)
1783 transport
= TCP_TRANSPORT
;
1784 } else if (!strcmp(transport_name
, "iser")) {
1785 transport
= ISER_TRANSPORT
;
1787 /* TCP is what older libiscsi versions always use */
1790 error_setg(errp
, "Unknown transport: %s", transport_name
);
1795 memset(iscsilun
, 0, sizeof(IscsiLun
));
1797 initiator_name
= get_initiator_name(opts
);
1799 iscsi
= iscsi_create_context(initiator_name
);
1800 if (iscsi
== NULL
) {
1801 error_setg(errp
, "iSCSI: Failed to create iSCSI context.");
1805 #if LIBISCSI_API_VERSION >= (20160603)
1806 if (iscsi_init_transport(iscsi
, transport
)) {
1807 error_setg(errp
, ("Error initializing transport."));
1812 if (iscsi_set_targetname(iscsi
, target
)) {
1813 error_setg(errp
, "iSCSI: Failed to set target name.");
1818 /* check if we got CHAP username/password via the options */
1819 apply_chap(iscsi
, opts
, &local_err
);
1820 if (local_err
!= NULL
) {
1821 error_propagate(errp
, local_err
);
1826 if (iscsi_set_session_type(iscsi
, ISCSI_SESSION_NORMAL
) != 0) {
1827 error_setg(errp
, "iSCSI: Failed to set session type to normal.");
1832 /* check if we got HEADER_DIGEST via the options */
1833 apply_header_digest(iscsi
, opts
, &local_err
);
1834 if (local_err
!= NULL
) {
1835 error_propagate(errp
, local_err
);
1840 /* timeout handling is broken in libiscsi before 1.15.0 */
1841 timeout
= qemu_opt_get_number(opts
, "timeout", 0);
1842 #if LIBISCSI_API_VERSION >= 20150621
1843 iscsi_set_timeout(iscsi
, timeout
);
1846 error_report("iSCSI: ignoring timeout value for libiscsi <1.15.0");
1850 if (iscsi_full_connect_sync(iscsi
, portal
, lun
) != 0) {
1851 error_setg(errp
, "iSCSI: Failed to connect to LUN : %s",
1852 iscsi_get_error(iscsi
));
1857 iscsilun
->iscsi
= iscsi
;
1858 iscsilun
->aio_context
= bdrv_get_aio_context(bs
);
1859 iscsilun
->lun
= lun
;
1860 iscsilun
->has_write_same
= true;
1862 task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 0, 0,
1863 (void **) &inq
, errp
);
1868 iscsilun
->type
= inq
->periperal_device_type
;
1869 scsi_free_scsi_task(task
);
1872 iscsi_modesense_sync(iscsilun
);
1873 if (iscsilun
->dpofua
) {
1874 bs
->supported_write_flags
= BDRV_REQ_FUA
;
1877 /* Check the write protect flag of the LUN if we want to write */
1878 if (iscsilun
->type
== TYPE_DISK
&& (flags
& BDRV_O_RDWR
) &&
1879 iscsilun
->write_protected
) {
1880 error_setg(errp
, "Cannot open a write protected LUN as read-write");
1885 iscsi_readcapacity_sync(iscsilun
, &local_err
);
1886 if (local_err
!= NULL
) {
1887 error_propagate(errp
, local_err
);
1891 bs
->total_sectors
= sector_lun2qemu(iscsilun
->num_blocks
, iscsilun
);
1893 /* We don't have any emulation for devices other than disks and CD-ROMs, so
1894 * this must be sg ioctl compatible. We force it to be sg, otherwise qemu
1895 * will try to read from the device to guess the image format.
1897 if (iscsilun
->type
!= TYPE_DISK
&& iscsilun
->type
!= TYPE_ROM
) {
1901 task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1902 SCSI_INQUIRY_PAGECODE_SUPPORTED_VPD_PAGES
,
1903 (void **) &inq_vpd
, errp
);
1908 for (i
= 0; i
< inq_vpd
->num_pages
; i
++) {
1909 struct scsi_task
*inq_task
;
1910 struct scsi_inquiry_logical_block_provisioning
*inq_lbp
;
1911 struct scsi_inquiry_block_limits
*inq_bl
;
1912 struct scsi_inquiry_device_identification
*inq_di
;
1913 switch (inq_vpd
->pages
[i
]) {
1914 case SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING
:
1915 inq_task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1916 SCSI_INQUIRY_PAGECODE_LOGICAL_BLOCK_PROVISIONING
,
1917 (void **) &inq_lbp
, errp
);
1918 if (inq_task
== NULL
) {
1922 memcpy(&iscsilun
->lbp
, inq_lbp
,
1923 sizeof(struct scsi_inquiry_logical_block_provisioning
));
1924 scsi_free_scsi_task(inq_task
);
1926 case SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS
:
1927 inq_task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1928 SCSI_INQUIRY_PAGECODE_BLOCK_LIMITS
,
1929 (void **) &inq_bl
, errp
);
1930 if (inq_task
== NULL
) {
1934 memcpy(&iscsilun
->bl
, inq_bl
,
1935 sizeof(struct scsi_inquiry_block_limits
));
1936 scsi_free_scsi_task(inq_task
);
1938 case SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION
:
1939 inq_task
= iscsi_do_inquiry(iscsilun
->iscsi
, iscsilun
->lun
, 1,
1940 SCSI_INQUIRY_PAGECODE_DEVICE_IDENTIFICATION
,
1941 (void **) &inq_di
, errp
);
1942 if (inq_task
== NULL
) {
1946 iscsi_save_designator(iscsilun
, inq_di
);
1947 scsi_free_scsi_task(inq_task
);
1953 scsi_free_scsi_task(task
);
1956 qemu_mutex_init(&iscsilun
->mutex
);
1957 iscsi_attach_aio_context(bs
, iscsilun
->aio_context
);
1959 /* Guess the internal cluster (page) size of the iscsi target by the means
1960 * of opt_unmap_gran. Transfer the unmap granularity only if it has a
1961 * reasonable size */
1962 if (iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
>= 4 * 1024 &&
1963 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
<= 16 * 1024 * 1024) {
1964 iscsilun
->cluster_size
= iscsilun
->bl
.opt_unmap_gran
*
1965 iscsilun
->block_size
;
1966 if (iscsilun
->lbprz
) {
1967 ret
= iscsi_allocmap_init(iscsilun
, bs
->open_flags
);
1971 if (iscsilun
->lbprz
&& iscsilun
->lbp
.lbpws
) {
1972 bs
->supported_zero_flags
= BDRV_REQ_MAY_UNMAP
;
1976 qemu_opts_del(opts
);
1977 g_free(initiator_name
);
1979 scsi_free_scsi_task(task
);
1983 if (iscsi
!= NULL
) {
1984 if (iscsi_is_logged_in(iscsi
)) {
1985 iscsi_logout_sync(iscsi
);
1987 iscsi_destroy_context(iscsi
);
1989 memset(iscsilun
, 0, sizeof(IscsiLun
));
1995 static void iscsi_close(BlockDriverState
*bs
)
1997 IscsiLun
*iscsilun
= bs
->opaque
;
1998 struct iscsi_context
*iscsi
= iscsilun
->iscsi
;
2000 iscsi_detach_aio_context(bs
);
2001 if (iscsi_is_logged_in(iscsi
)) {
2002 iscsi_logout_sync(iscsi
);
2004 iscsi_destroy_context(iscsi
);
2006 g_free(iscsilun
->dd
->designator
);
2007 g_free(iscsilun
->dd
);
2009 g_free(iscsilun
->zeroblock
);
2010 iscsi_allocmap_free(iscsilun
);
2011 qemu_mutex_destroy(&iscsilun
->mutex
);
2012 memset(iscsilun
, 0, sizeof(IscsiLun
));
2015 static void iscsi_refresh_limits(BlockDriverState
*bs
, Error
**errp
)
2017 /* We don't actually refresh here, but just return data queried in
2018 * iscsi_open(): iscsi targets don't change their limits. */
2020 IscsiLun
*iscsilun
= bs
->opaque
;
2021 uint64_t max_xfer_len
= iscsilun
->use_16_for_rw
? 0xffffffff : 0xffff;
2022 unsigned int block_size
= MAX(BDRV_SECTOR_SIZE
, iscsilun
->block_size
);
2024 assert(iscsilun
->block_size
>= BDRV_SECTOR_SIZE
|| bs
->sg
);
2026 bs
->bl
.request_alignment
= block_size
;
2028 if (iscsilun
->bl
.max_xfer_len
) {
2029 max_xfer_len
= MIN(max_xfer_len
, iscsilun
->bl
.max_xfer_len
);
2032 if (max_xfer_len
* block_size
< INT_MAX
) {
2033 bs
->bl
.max_transfer
= max_xfer_len
* iscsilun
->block_size
;
2036 if (iscsilun
->lbp
.lbpu
) {
2037 if (iscsilun
->bl
.max_unmap
< 0xffffffff / block_size
) {
2038 bs
->bl
.max_pdiscard
=
2039 iscsilun
->bl
.max_unmap
* iscsilun
->block_size
;
2041 bs
->bl
.pdiscard_alignment
=
2042 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
;
2044 bs
->bl
.pdiscard_alignment
= iscsilun
->block_size
;
2047 if (iscsilun
->bl
.max_ws_len
< 0xffffffff / block_size
) {
2048 bs
->bl
.max_pwrite_zeroes
=
2049 iscsilun
->bl
.max_ws_len
* iscsilun
->block_size
;
2051 if (iscsilun
->lbp
.lbpws
) {
2052 bs
->bl
.pwrite_zeroes_alignment
=
2053 iscsilun
->bl
.opt_unmap_gran
* iscsilun
->block_size
;
2055 bs
->bl
.pwrite_zeroes_alignment
= iscsilun
->block_size
;
2057 if (iscsilun
->bl
.opt_xfer_len
&&
2058 iscsilun
->bl
.opt_xfer_len
< INT_MAX
/ block_size
) {
2059 bs
->bl
.opt_transfer
= pow2floor(iscsilun
->bl
.opt_xfer_len
*
2060 iscsilun
->block_size
);
2064 /* Note that this will not re-establish a connection with an iSCSI target - it
2065 * is effectively a NOP. */
2066 static int iscsi_reopen_prepare(BDRVReopenState
*state
,
2067 BlockReopenQueue
*queue
, Error
**errp
)
2069 IscsiLun
*iscsilun
= state
->bs
->opaque
;
2071 if (state
->flags
& BDRV_O_RDWR
&& iscsilun
->write_protected
) {
2072 error_setg(errp
, "Cannot open a write protected LUN as read-write");
2078 static void iscsi_reopen_commit(BDRVReopenState
*reopen_state
)
2080 IscsiLun
*iscsilun
= reopen_state
->bs
->opaque
;
2082 /* the cache.direct status might have changed */
2083 if (iscsilun
->allocmap
!= NULL
) {
2084 iscsi_allocmap_init(iscsilun
, reopen_state
->flags
);
2088 static int iscsi_truncate(BlockDriverState
*bs
, int64_t offset
,
2089 PreallocMode prealloc
, Error
**errp
)
2091 IscsiLun
*iscsilun
= bs
->opaque
;
2092 Error
*local_err
= NULL
;
2094 if (prealloc
!= PREALLOC_MODE_OFF
) {
2095 error_setg(errp
, "Unsupported preallocation mode '%s'",
2096 PreallocMode_str(prealloc
));
2100 if (iscsilun
->type
!= TYPE_DISK
) {
2101 error_setg(errp
, "Cannot resize non-disk iSCSI devices");
2105 iscsi_readcapacity_sync(iscsilun
, &local_err
);
2106 if (local_err
!= NULL
) {
2107 error_propagate(errp
, local_err
);
2111 if (offset
> iscsi_getlength(bs
)) {
2112 error_setg(errp
, "Cannot grow iSCSI devices");
2116 if (iscsilun
->allocmap
!= NULL
) {
2117 iscsi_allocmap_init(iscsilun
, bs
->open_flags
);
2123 static int coroutine_fn
iscsi_co_create_opts(const char *filename
, QemuOpts
*opts
,
2127 int64_t total_size
= 0;
2128 BlockDriverState
*bs
;
2129 IscsiLun
*iscsilun
= NULL
;
2131 Error
*local_err
= NULL
;
2135 /* Read out options */
2136 total_size
= DIV_ROUND_UP(qemu_opt_get_size_del(opts
, BLOCK_OPT_SIZE
, 0),
2138 bs
->opaque
= g_new0(struct IscsiLun
, 1);
2139 iscsilun
= bs
->opaque
;
2141 bs_options
= qdict_new();
2142 iscsi_parse_filename(filename
, bs_options
, &local_err
);
2144 error_propagate(errp
, local_err
);
2147 ret
= iscsi_open(bs
, bs_options
, 0, NULL
);
2149 qobject_unref(bs_options
);
2154 iscsi_detach_aio_context(bs
);
2155 if (iscsilun
->type
!= TYPE_DISK
) {
2159 if (bs
->total_sectors
< total_size
) {
2166 if (iscsilun
->iscsi
!= NULL
) {
2167 iscsi_destroy_context(iscsilun
->iscsi
);
2175 static int iscsi_get_info(BlockDriverState
*bs
, BlockDriverInfo
*bdi
)
2177 IscsiLun
*iscsilun
= bs
->opaque
;
2178 bdi
->unallocated_blocks_are_zero
= iscsilun
->lbprz
;
2179 bdi
->cluster_size
= iscsilun
->cluster_size
;
2183 static void coroutine_fn
iscsi_co_invalidate_cache(BlockDriverState
*bs
,
2186 IscsiLun
*iscsilun
= bs
->opaque
;
2187 iscsi_allocmap_invalidate(iscsilun
);
2190 static int coroutine_fn
iscsi_co_copy_range_from(BlockDriverState
*bs
,
2192 uint64_t src_offset
,
2194 uint64_t dst_offset
,
2196 BdrvRequestFlags flags
)
2198 return bdrv_co_copy_range_to(src
, src_offset
, dst
, dst_offset
, bytes
, flags
);
2201 static struct scsi_task
*iscsi_xcopy_task(int param_len
)
2203 struct scsi_task
*task
;
2205 task
= g_new0(struct scsi_task
, 1);
2207 task
->cdb
[0] = EXTENDED_COPY
;
2208 task
->cdb
[10] = (param_len
>> 24) & 0xFF;
2209 task
->cdb
[11] = (param_len
>> 16) & 0xFF;
2210 task
->cdb
[12] = (param_len
>> 8) & 0xFF;
2211 task
->cdb
[13] = param_len
& 0xFF;
2212 task
->cdb_size
= 16;
2213 task
->xfer_dir
= SCSI_XFER_WRITE
;
2214 task
->expxferlen
= param_len
;
2219 static void iscsi_populate_target_desc(unsigned char *desc
, IscsiLun
*lun
)
2221 struct scsi_inquiry_device_designator
*dd
= lun
->dd
;
2223 memset(desc
, 0, 32);
2224 desc
[0] = 0xE4; /* IDENT_DESCR_TGT_DESCR */
2225 desc
[4] = dd
->code_set
;
2226 desc
[5] = (dd
->designator_type
& 0xF)
2227 | ((dd
->association
& 3) << 4);
2228 desc
[7] = dd
->designator_length
;
2229 memcpy(desc
+ 8, dd
->designator
, dd
->designator_length
);
2232 desc
[29] = (lun
->block_size
>> 16) & 0xFF;
2233 desc
[30] = (lun
->block_size
>> 8) & 0xFF;
2234 desc
[31] = lun
->block_size
& 0xFF;
2237 static void iscsi_xcopy_desc_hdr(uint8_t *hdr
, int dc
, int cat
, int src_index
,
2240 hdr
[0] = 0x02; /* BLK_TO_BLK_SEG_DESCR */
2241 hdr
[1] = ((dc
<< 1) | cat
) & 0xFF;
2242 hdr
[2] = (XCOPY_BLK2BLK_SEG_DESC_SIZE
>> 8) & 0xFF;
2243 /* don't account for the first 4 bytes in descriptor header*/
2244 hdr
[3] = (XCOPY_BLK2BLK_SEG_DESC_SIZE
- 4 /* SEG_DESC_SRC_INDEX_OFFSET */) & 0xFF;
2245 hdr
[4] = (src_index
>> 8) & 0xFF;
2246 hdr
[5] = src_index
& 0xFF;
2247 hdr
[6] = (dst_index
>> 8) & 0xFF;
2248 hdr
[7] = dst_index
& 0xFF;
2251 static void iscsi_xcopy_populate_desc(uint8_t *desc
, int dc
, int cat
,
2252 int src_index
, int dst_index
, int num_blks
,
2253 uint64_t src_lba
, uint64_t dst_lba
)
2255 iscsi_xcopy_desc_hdr(desc
, dc
, cat
, src_index
, dst_index
);
2257 /* The caller should verify the request size */
2258 assert(num_blks
< 65536);
2259 desc
[10] = (num_blks
>> 8) & 0xFF;
2260 desc
[11] = num_blks
& 0xFF;
2261 desc
[12] = (src_lba
>> 56) & 0xFF;
2262 desc
[13] = (src_lba
>> 48) & 0xFF;
2263 desc
[14] = (src_lba
>> 40) & 0xFF;
2264 desc
[15] = (src_lba
>> 32) & 0xFF;
2265 desc
[16] = (src_lba
>> 24) & 0xFF;
2266 desc
[17] = (src_lba
>> 16) & 0xFF;
2267 desc
[18] = (src_lba
>> 8) & 0xFF;
2268 desc
[19] = src_lba
& 0xFF;
2269 desc
[20] = (dst_lba
>> 56) & 0xFF;
2270 desc
[21] = (dst_lba
>> 48) & 0xFF;
2271 desc
[22] = (dst_lba
>> 40) & 0xFF;
2272 desc
[23] = (dst_lba
>> 32) & 0xFF;
2273 desc
[24] = (dst_lba
>> 24) & 0xFF;
2274 desc
[25] = (dst_lba
>> 16) & 0xFF;
2275 desc
[26] = (dst_lba
>> 8) & 0xFF;
2276 desc
[27] = dst_lba
& 0xFF;
2279 static void iscsi_xcopy_populate_header(unsigned char *buf
, int list_id
, int str
,
2280 int list_id_usage
, int prio
,
2282 int seg_desc_len
, int inline_data_len
)
2285 buf
[1] = ((str
& 1) << 5) | ((list_id_usage
& 3) << 3) | (prio
& 7);
2286 buf
[2] = (tgt_desc_len
>> 8) & 0xFF;
2287 buf
[3] = tgt_desc_len
& 0xFF;
2288 buf
[8] = (seg_desc_len
>> 24) & 0xFF;
2289 buf
[9] = (seg_desc_len
>> 16) & 0xFF;
2290 buf
[10] = (seg_desc_len
>> 8) & 0xFF;
2291 buf
[11] = seg_desc_len
& 0xFF;
2292 buf
[12] = (inline_data_len
>> 24) & 0xFF;
2293 buf
[13] = (inline_data_len
>> 16) & 0xFF;
2294 buf
[14] = (inline_data_len
>> 8) & 0xFF;
2295 buf
[15] = inline_data_len
& 0xFF;
2298 static void iscsi_xcopy_data(struct iscsi_data
*data
,
2299 IscsiLun
*src
, int64_t src_lba
,
2300 IscsiLun
*dst
, int64_t dst_lba
,
2301 uint16_t num_blocks
)
2304 const int src_offset
= XCOPY_DESC_OFFSET
;
2305 const int dst_offset
= XCOPY_DESC_OFFSET
+ IDENT_DESCR_TGT_DESCR_SIZE
;
2306 const int seg_offset
= dst_offset
+ IDENT_DESCR_TGT_DESCR_SIZE
;
2308 data
->size
= XCOPY_DESC_OFFSET
+
2309 IDENT_DESCR_TGT_DESCR_SIZE
* 2 +
2310 XCOPY_BLK2BLK_SEG_DESC_SIZE
;
2311 data
->data
= g_malloc0(data
->size
);
2314 /* Initialise the parameter list header */
2315 iscsi_xcopy_populate_header(buf
, 1, 0, 2 /* LIST_ID_USAGE_DISCARD */,
2316 0, 2 * IDENT_DESCR_TGT_DESCR_SIZE
,
2317 XCOPY_BLK2BLK_SEG_DESC_SIZE
,
2320 /* Initialise CSCD list with one src + one dst descriptor */
2321 iscsi_populate_target_desc(&buf
[src_offset
], src
);
2322 iscsi_populate_target_desc(&buf
[dst_offset
], dst
);
2324 /* Initialise one segment descriptor */
2325 iscsi_xcopy_populate_desc(&buf
[seg_offset
], 0, 0, 0, 1, num_blocks
,
2329 static int coroutine_fn
iscsi_co_copy_range_to(BlockDriverState
*bs
,
2331 uint64_t src_offset
,
2333 uint64_t dst_offset
,
2335 BdrvRequestFlags flags
)
2337 IscsiLun
*dst_lun
= dst
->bs
->opaque
;
2339 struct IscsiTask iscsi_task
;
2340 struct iscsi_data data
;
2344 if (src
->bs
->drv
->bdrv_co_copy_range_to
!= iscsi_co_copy_range_to
) {
2347 src_lun
= src
->bs
->opaque
;
2349 if (!src_lun
->dd
|| !dst_lun
->dd
) {
2352 if (!is_byte_request_lun_aligned(dst_offset
, bytes
, dst_lun
)) {
2355 if (!is_byte_request_lun_aligned(src_offset
, bytes
, src_lun
)) {
2358 if (dst_lun
->block_size
!= src_lun
->block_size
||
2359 !dst_lun
->block_size
) {
2363 block_size
= dst_lun
->block_size
;
2364 if (bytes
/ block_size
> 65535) {
2368 iscsi_xcopy_data(&data
,
2369 src_lun
, src_offset
/ block_size
,
2370 dst_lun
, dst_offset
/ block_size
,
2371 bytes
/ block_size
);
2373 iscsi_co_init_iscsitask(dst_lun
, &iscsi_task
);
2375 qemu_mutex_lock(&dst_lun
->mutex
);
2376 iscsi_task
.task
= iscsi_xcopy_task(data
.size
);
2378 if (iscsi_scsi_command_async(dst_lun
->iscsi
, dst_lun
->lun
,
2379 iscsi_task
.task
, iscsi_co_generic_cb
,
2381 &iscsi_task
) != 0) {
2386 iscsi_co_wait_for_task(&iscsi_task
, dst_lun
);
2388 if (iscsi_task
.do_retry
) {
2389 iscsi_task
.complete
= 0;
2393 if (iscsi_task
.status
!= SCSI_STATUS_GOOD
) {
2394 r
= iscsi_task
.err_code
;
2399 g_free(iscsi_task
.task
);
2400 qemu_mutex_unlock(&dst_lun
->mutex
);
2401 g_free(iscsi_task
.err_str
);
2405 static QemuOptsList iscsi_create_opts
= {
2406 .name
= "iscsi-create-opts",
2407 .head
= QTAILQ_HEAD_INITIALIZER(iscsi_create_opts
.head
),
2410 .name
= BLOCK_OPT_SIZE
,
2411 .type
= QEMU_OPT_SIZE
,
2412 .help
= "Virtual disk size"
2414 { /* end of list */ }
2418 static BlockDriver bdrv_iscsi
= {
2419 .format_name
= "iscsi",
2420 .protocol_name
= "iscsi",
2422 .instance_size
= sizeof(IscsiLun
),
2423 .bdrv_parse_filename
= iscsi_parse_filename
,
2424 .bdrv_file_open
= iscsi_open
,
2425 .bdrv_close
= iscsi_close
,
2426 .bdrv_co_create_opts
= iscsi_co_create_opts
,
2427 .create_opts
= &iscsi_create_opts
,
2428 .bdrv_reopen_prepare
= iscsi_reopen_prepare
,
2429 .bdrv_reopen_commit
= iscsi_reopen_commit
,
2430 .bdrv_co_invalidate_cache
= iscsi_co_invalidate_cache
,
2432 .bdrv_getlength
= iscsi_getlength
,
2433 .bdrv_get_info
= iscsi_get_info
,
2434 .bdrv_truncate
= iscsi_truncate
,
2435 .bdrv_refresh_limits
= iscsi_refresh_limits
,
2437 .bdrv_co_block_status
= iscsi_co_block_status
,
2438 .bdrv_co_pdiscard
= iscsi_co_pdiscard
,
2439 .bdrv_co_copy_range_from
= iscsi_co_copy_range_from
,
2440 .bdrv_co_copy_range_to
= iscsi_co_copy_range_to
,
2441 .bdrv_co_pwrite_zeroes
= iscsi_co_pwrite_zeroes
,
2442 .bdrv_co_readv
= iscsi_co_readv
,
2443 .bdrv_co_writev
= iscsi_co_writev
,
2444 .bdrv_co_flush_to_disk
= iscsi_co_flush
,
2447 .bdrv_aio_ioctl
= iscsi_aio_ioctl
,
2450 .bdrv_detach_aio_context
= iscsi_detach_aio_context
,
2451 .bdrv_attach_aio_context
= iscsi_attach_aio_context
,
2454 #if LIBISCSI_API_VERSION >= (20160603)
2455 static BlockDriver bdrv_iser
= {
2456 .format_name
= "iser",
2457 .protocol_name
= "iser",
2459 .instance_size
= sizeof(IscsiLun
),
2460 .bdrv_parse_filename
= iscsi_parse_filename
,
2461 .bdrv_file_open
= iscsi_open
,
2462 .bdrv_close
= iscsi_close
,
2463 .bdrv_co_create_opts
= iscsi_co_create_opts
,
2464 .create_opts
= &iscsi_create_opts
,
2465 .bdrv_reopen_prepare
= iscsi_reopen_prepare
,
2466 .bdrv_reopen_commit
= iscsi_reopen_commit
,
2467 .bdrv_co_invalidate_cache
= iscsi_co_invalidate_cache
,
2469 .bdrv_getlength
= iscsi_getlength
,
2470 .bdrv_get_info
= iscsi_get_info
,
2471 .bdrv_truncate
= iscsi_truncate
,
2472 .bdrv_refresh_limits
= iscsi_refresh_limits
,
2474 .bdrv_co_block_status
= iscsi_co_block_status
,
2475 .bdrv_co_pdiscard
= iscsi_co_pdiscard
,
2476 .bdrv_co_copy_range_from
= iscsi_co_copy_range_from
,
2477 .bdrv_co_copy_range_to
= iscsi_co_copy_range_to
,
2478 .bdrv_co_pwrite_zeroes
= iscsi_co_pwrite_zeroes
,
2479 .bdrv_co_readv
= iscsi_co_readv
,
2480 .bdrv_co_writev
= iscsi_co_writev
,
2481 .bdrv_co_flush_to_disk
= iscsi_co_flush
,
2484 .bdrv_aio_ioctl
= iscsi_aio_ioctl
,
2487 .bdrv_detach_aio_context
= iscsi_detach_aio_context
,
2488 .bdrv_attach_aio_context
= iscsi_attach_aio_context
,
2492 static void iscsi_block_init(void)
2494 bdrv_register(&bdrv_iscsi
);
2495 #if LIBISCSI_API_VERSION >= (20160603)
2496 bdrv_register(&bdrv_iser
);
2500 block_init(iscsi_block_init
);