2 * SCSI Device emulation
4 * Copyright (c) 2006 CodeSourcery.
5 * Based on code by Fabrice Bellard
7 * Written by Paul Brook
9 * 2009-Dec-12 Artyom Tarasenko : implemented stamdard inquiry for the case
10 * when the allocation length of CDB is smaller
12 * 2009-Oct-13 Artyom Tarasenko : implemented the block descriptor in the
13 * MODE SENSE response.
15 * This code is licensed under the LGPL.
17 * Note that this file only handles the SCSI architecture model and device
18 * commands. Emulation of interface/link layer protocols is handled by
19 * the host adapter emulator.
22 #include "qemu/osdep.h"
23 #include "qemu/units.h"
24 #include "qapi/error.h"
25 #include "qemu/error-report.h"
26 #include "qemu/main-loop.h"
27 #include "qemu/module.h"
28 #include "qemu/hw-version.h"
29 #include "qemu/memalign.h"
30 #include "hw/scsi/scsi.h"
31 #include "migration/qemu-file-types.h"
32 #include "migration/vmstate.h"
33 #include "hw/scsi/emulation.h"
34 #include "scsi/constants.h"
35 #include "sysemu/block-backend.h"
36 #include "sysemu/blockdev.h"
37 #include "hw/block/block.h"
38 #include "hw/qdev-properties.h"
39 #include "hw/qdev-properties-system.h"
40 #include "sysemu/dma.h"
41 #include "sysemu/sysemu.h"
42 #include "qemu/cutils.h"
44 #include "qom/object.h"
50 #define SCSI_WRITE_SAME_MAX (512 * KiB)
51 #define SCSI_DMA_BUF_SIZE (128 * KiB)
52 #define SCSI_MAX_INQUIRY_LEN 256
53 #define SCSI_MAX_MODE_LEN 256
55 #define DEFAULT_DISCARD_GRANULARITY (4 * KiB)
56 #define DEFAULT_MAX_UNMAP_SIZE (1 * GiB)
57 #define DEFAULT_MAX_IO_SIZE INT_MAX /* 2 GB - 1 block */
59 #define TYPE_SCSI_DISK_BASE "scsi-disk-base"
61 OBJECT_DECLARE_TYPE(SCSIDiskState
, SCSIDiskClass
, SCSI_DISK_BASE
)
63 struct SCSIDiskClass
{
64 SCSIDeviceClass parent_class
;
66 DMAIOFunc
*dma_writev
;
67 bool (*need_fua_emulation
)(SCSICommand
*cmd
);
68 void (*update_sense
)(SCSIRequest
*r
);
71 typedef struct SCSIDiskReq
{
73 /* Both sector and sector_count are in terms of BDRV_SECTOR_SIZE bytes. */
75 uint32_t sector_count
;
78 bool need_fua_emulation
;
84 #define SCSI_DISK_F_REMOVABLE 0
85 #define SCSI_DISK_F_DPOFUA 1
86 #define SCSI_DISK_F_NO_REMOVABLE_DEVOPS 2
88 struct SCSIDiskState
{
95 uint64_t max_unmap_size
;
106 * 0x0000 - rotation rate not reported
107 * 0x0001 - non-rotating medium (SSD)
108 * 0x0002-0x0400 - reserved
109 * 0x0401-0xffe - rotations per minute
112 uint16_t rotation_rate
;
115 static void scsi_free_request(SCSIRequest
*req
)
117 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
119 qemu_vfree(r
->iov
.iov_base
);
122 /* Helper function for command completion with sense. */
123 static void scsi_check_condition(SCSIDiskReq
*r
, SCSISense sense
)
125 trace_scsi_disk_check_condition(r
->req
.tag
, sense
.key
, sense
.asc
,
127 scsi_req_build_sense(&r
->req
, sense
);
128 scsi_req_complete(&r
->req
, CHECK_CONDITION
);
131 static void scsi_init_iovec(SCSIDiskReq
*r
, size_t size
)
133 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
135 if (!r
->iov
.iov_base
) {
137 r
->iov
.iov_base
= blk_blockalign(s
->qdev
.conf
.blk
, r
->buflen
);
139 r
->iov
.iov_len
= MIN(r
->sector_count
* BDRV_SECTOR_SIZE
, r
->buflen
);
140 qemu_iovec_init_external(&r
->qiov
, &r
->iov
, 1);
143 static void scsi_disk_save_request(QEMUFile
*f
, SCSIRequest
*req
)
145 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
147 qemu_put_be64s(f
, &r
->sector
);
148 qemu_put_be32s(f
, &r
->sector_count
);
149 qemu_put_be32s(f
, &r
->buflen
);
151 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
152 qemu_put_buffer(f
, r
->iov
.iov_base
, r
->iov
.iov_len
);
153 } else if (!req
->retry
) {
154 uint32_t len
= r
->iov
.iov_len
;
155 qemu_put_be32s(f
, &len
);
156 qemu_put_buffer(f
, r
->iov
.iov_base
, r
->iov
.iov_len
);
161 static void scsi_disk_load_request(QEMUFile
*f
, SCSIRequest
*req
)
163 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
165 qemu_get_be64s(f
, &r
->sector
);
166 qemu_get_be32s(f
, &r
->sector_count
);
167 qemu_get_be32s(f
, &r
->buflen
);
169 scsi_init_iovec(r
, r
->buflen
);
170 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
171 qemu_get_buffer(f
, r
->iov
.iov_base
, r
->iov
.iov_len
);
172 } else if (!r
->req
.retry
) {
174 qemu_get_be32s(f
, &len
);
175 r
->iov
.iov_len
= len
;
176 assert(r
->iov
.iov_len
<= r
->buflen
);
177 qemu_get_buffer(f
, r
->iov
.iov_base
, r
->iov
.iov_len
);
181 qemu_iovec_init_external(&r
->qiov
, &r
->iov
, 1);
185 * scsi_handle_rw_error has two return values. False means that the error
186 * must be ignored, true means that the error has been processed and the
187 * caller should not do anything else for this request. Note that
188 * scsi_handle_rw_error always manages its reference counts, independent
189 * of the return value.
191 static bool scsi_handle_rw_error(SCSIDiskReq
*r
, int ret
, bool acct_failed
)
193 bool is_read
= (r
->req
.cmd
.mode
== SCSI_XFER_FROM_DEV
);
194 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
195 SCSIDiskClass
*sdc
= (SCSIDiskClass
*) object_get_class(OBJECT(s
));
196 SCSISense sense
= SENSE_CODE(NO_SENSE
);
198 bool req_has_sense
= false;
199 BlockErrorAction action
;
203 status
= scsi_sense_from_errno(-ret
, &sense
);
206 /* A passthrough command has completed with nonzero status. */
208 if (status
== CHECK_CONDITION
) {
209 req_has_sense
= true;
210 error
= scsi_sense_buf_to_errno(r
->req
.sense
, sizeof(r
->req
.sense
));
217 * Check whether the error has to be handled by the guest or should
218 * rather follow the rerror=/werror= settings. Guest-handled errors
219 * are usually retried immediately, so do not post them to QMP and
220 * do not account them as failed I/O.
223 scsi_sense_buf_is_guest_recoverable(r
->req
.sense
, sizeof(r
->req
.sense
))) {
224 action
= BLOCK_ERROR_ACTION_REPORT
;
227 action
= blk_get_error_action(s
->qdev
.conf
.blk
, is_read
, error
);
228 blk_error_action(s
->qdev
.conf
.blk
, action
, is_read
, error
);
232 case BLOCK_ERROR_ACTION_REPORT
:
234 block_acct_failed(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
237 sdc
->update_sense(&r
->req
);
238 } else if (status
== CHECK_CONDITION
) {
239 scsi_req_build_sense(&r
->req
, sense
);
241 scsi_req_complete(&r
->req
, status
);
244 case BLOCK_ERROR_ACTION_IGNORE
:
247 case BLOCK_ERROR_ACTION_STOP
:
248 scsi_req_retry(&r
->req
);
252 g_assert_not_reached();
256 static bool scsi_disk_req_check_error(SCSIDiskReq
*r
, int ret
, bool acct_failed
)
258 if (r
->req
.io_canceled
) {
259 scsi_req_cancel_complete(&r
->req
);
264 return scsi_handle_rw_error(r
, ret
, acct_failed
);
270 static void scsi_aio_complete(void *opaque
, int ret
)
272 SCSIDiskReq
*r
= (SCSIDiskReq
*)opaque
;
273 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
275 assert(r
->req
.aiocb
!= NULL
);
277 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
278 if (scsi_disk_req_check_error(r
, ret
, true)) {
282 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
283 scsi_req_complete(&r
->req
, GOOD
);
286 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
287 scsi_req_unref(&r
->req
);
290 static bool scsi_is_cmd_fua(SCSICommand
*cmd
)
292 switch (cmd
->buf
[0]) {
299 return (cmd
->buf
[1] & 8) != 0;
304 case WRITE_VERIFY_10
:
305 case WRITE_VERIFY_12
:
306 case WRITE_VERIFY_16
:
316 static void scsi_write_do_fua(SCSIDiskReq
*r
)
318 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
320 assert(r
->req
.aiocb
== NULL
);
321 assert(!r
->req
.io_canceled
);
323 if (r
->need_fua_emulation
) {
324 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
, 0,
326 r
->req
.aiocb
= blk_aio_flush(s
->qdev
.conf
.blk
, scsi_aio_complete
, r
);
330 scsi_req_complete(&r
->req
, GOOD
);
331 scsi_req_unref(&r
->req
);
334 static void scsi_dma_complete_noio(SCSIDiskReq
*r
, int ret
)
336 assert(r
->req
.aiocb
== NULL
);
337 if (scsi_disk_req_check_error(r
, ret
, false)) {
341 r
->sector
+= r
->sector_count
;
343 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
344 scsi_write_do_fua(r
);
347 scsi_req_complete(&r
->req
, GOOD
);
351 scsi_req_unref(&r
->req
);
354 static void scsi_dma_complete(void *opaque
, int ret
)
356 SCSIDiskReq
*r
= (SCSIDiskReq
*)opaque
;
357 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
359 assert(r
->req
.aiocb
!= NULL
);
362 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
364 block_acct_failed(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
366 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
368 scsi_dma_complete_noio(r
, ret
);
369 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
372 static void scsi_read_complete_noio(SCSIDiskReq
*r
, int ret
)
376 assert(r
->req
.aiocb
== NULL
);
377 if (scsi_disk_req_check_error(r
, ret
, false)) {
381 n
= r
->qiov
.size
/ BDRV_SECTOR_SIZE
;
383 r
->sector_count
-= n
;
384 scsi_req_data(&r
->req
, r
->qiov
.size
);
387 scsi_req_unref(&r
->req
);
390 static void scsi_read_complete(void *opaque
, int ret
)
392 SCSIDiskReq
*r
= (SCSIDiskReq
*)opaque
;
393 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
395 assert(r
->req
.aiocb
!= NULL
);
398 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
400 block_acct_failed(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
402 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
403 trace_scsi_disk_read_complete(r
->req
.tag
, r
->qiov
.size
);
405 scsi_read_complete_noio(r
, ret
);
406 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
409 /* Actually issue a read to the block device. */
410 static void scsi_do_read(SCSIDiskReq
*r
, int ret
)
412 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
413 SCSIDiskClass
*sdc
= (SCSIDiskClass
*) object_get_class(OBJECT(s
));
415 assert (r
->req
.aiocb
== NULL
);
416 if (scsi_disk_req_check_error(r
, ret
, false)) {
420 /* The request is used as the AIO opaque value, so add a ref. */
421 scsi_req_ref(&r
->req
);
424 dma_acct_start(s
->qdev
.conf
.blk
, &r
->acct
, r
->req
.sg
, BLOCK_ACCT_READ
);
425 r
->req
.residual
-= r
->req
.sg
->size
;
426 r
->req
.aiocb
= dma_blk_io(blk_get_aio_context(s
->qdev
.conf
.blk
),
427 r
->req
.sg
, r
->sector
<< BDRV_SECTOR_BITS
,
429 sdc
->dma_readv
, r
, scsi_dma_complete
, r
,
430 DMA_DIRECTION_FROM_DEVICE
);
432 scsi_init_iovec(r
, SCSI_DMA_BUF_SIZE
);
433 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
434 r
->qiov
.size
, BLOCK_ACCT_READ
);
435 r
->req
.aiocb
= sdc
->dma_readv(r
->sector
<< BDRV_SECTOR_BITS
, &r
->qiov
,
436 scsi_read_complete
, r
, r
);
440 scsi_req_unref(&r
->req
);
443 static void scsi_do_read_cb(void *opaque
, int ret
)
445 SCSIDiskReq
*r
= (SCSIDiskReq
*)opaque
;
446 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
448 assert (r
->req
.aiocb
!= NULL
);
451 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
453 block_acct_failed(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
455 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
457 scsi_do_read(opaque
, ret
);
458 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
461 /* Read more data from scsi device into buffer. */
462 static void scsi_read_data(SCSIRequest
*req
)
464 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
465 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
468 trace_scsi_disk_read_data_count(r
->sector_count
);
469 if (r
->sector_count
== 0) {
470 /* This also clears the sense buffer for REQUEST SENSE. */
471 scsi_req_complete(&r
->req
, GOOD
);
475 /* No data transfer may already be in progress */
476 assert(r
->req
.aiocb
== NULL
);
478 /* The request is used as the AIO opaque value, so add a ref. */
479 scsi_req_ref(&r
->req
);
480 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
481 trace_scsi_disk_read_data_invalid();
482 scsi_read_complete_noio(r
, -EINVAL
);
486 if (!blk_is_available(req
->dev
->conf
.blk
)) {
487 scsi_read_complete_noio(r
, -ENOMEDIUM
);
493 if (first
&& r
->need_fua_emulation
) {
494 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
, 0,
496 r
->req
.aiocb
= blk_aio_flush(s
->qdev
.conf
.blk
, scsi_do_read_cb
, r
);
502 static void scsi_write_complete_noio(SCSIDiskReq
*r
, int ret
)
506 assert (r
->req
.aiocb
== NULL
);
507 if (scsi_disk_req_check_error(r
, ret
, false)) {
511 n
= r
->qiov
.size
/ BDRV_SECTOR_SIZE
;
513 r
->sector_count
-= n
;
514 if (r
->sector_count
== 0) {
515 scsi_write_do_fua(r
);
518 scsi_init_iovec(r
, SCSI_DMA_BUF_SIZE
);
519 trace_scsi_disk_write_complete_noio(r
->req
.tag
, r
->qiov
.size
);
520 scsi_req_data(&r
->req
, r
->qiov
.size
);
524 scsi_req_unref(&r
->req
);
527 static void scsi_write_complete(void * opaque
, int ret
)
529 SCSIDiskReq
*r
= (SCSIDiskReq
*)opaque
;
530 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
532 assert (r
->req
.aiocb
!= NULL
);
535 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
537 block_acct_failed(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
539 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
541 scsi_write_complete_noio(r
, ret
);
542 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
545 static void scsi_write_data(SCSIRequest
*req
)
547 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
548 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
549 SCSIDiskClass
*sdc
= (SCSIDiskClass
*) object_get_class(OBJECT(s
));
551 /* No data transfer may already be in progress */
552 assert(r
->req
.aiocb
== NULL
);
554 /* The request is used as the AIO opaque value, so add a ref. */
555 scsi_req_ref(&r
->req
);
556 if (r
->req
.cmd
.mode
!= SCSI_XFER_TO_DEV
) {
557 trace_scsi_disk_write_data_invalid();
558 scsi_write_complete_noio(r
, -EINVAL
);
562 if (!r
->req
.sg
&& !r
->qiov
.size
) {
563 /* Called for the first time. Ask the driver to send us more data. */
565 scsi_write_complete_noio(r
, 0);
568 if (!blk_is_available(req
->dev
->conf
.blk
)) {
569 scsi_write_complete_noio(r
, -ENOMEDIUM
);
573 if (r
->req
.cmd
.buf
[0] == VERIFY_10
|| r
->req
.cmd
.buf
[0] == VERIFY_12
||
574 r
->req
.cmd
.buf
[0] == VERIFY_16
) {
576 scsi_dma_complete_noio(r
, 0);
578 scsi_write_complete_noio(r
, 0);
584 dma_acct_start(s
->qdev
.conf
.blk
, &r
->acct
, r
->req
.sg
, BLOCK_ACCT_WRITE
);
585 r
->req
.residual
-= r
->req
.sg
->size
;
586 r
->req
.aiocb
= dma_blk_io(blk_get_aio_context(s
->qdev
.conf
.blk
),
587 r
->req
.sg
, r
->sector
<< BDRV_SECTOR_BITS
,
589 sdc
->dma_writev
, r
, scsi_dma_complete
, r
,
590 DMA_DIRECTION_TO_DEVICE
);
592 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
593 r
->qiov
.size
, BLOCK_ACCT_WRITE
);
594 r
->req
.aiocb
= sdc
->dma_writev(r
->sector
<< BDRV_SECTOR_BITS
, &r
->qiov
,
595 scsi_write_complete
, r
, r
);
599 /* Return a pointer to the data buffer. */
600 static uint8_t *scsi_get_buf(SCSIRequest
*req
)
602 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
604 return (uint8_t *)r
->iov
.iov_base
;
607 static int scsi_disk_emulate_vpd_page(SCSIRequest
*req
, uint8_t *outbuf
)
609 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
610 uint8_t page_code
= req
->cmd
.buf
[2];
611 int start
, buflen
= 0;
613 outbuf
[buflen
++] = s
->qdev
.type
& 0x1f;
614 outbuf
[buflen
++] = page_code
;
615 outbuf
[buflen
++] = 0x00;
616 outbuf
[buflen
++] = 0x00;
620 case 0x00: /* Supported page codes, mandatory */
622 trace_scsi_disk_emulate_vpd_page_00(req
->cmd
.xfer
);
623 outbuf
[buflen
++] = 0x00; /* list of supported pages (this page) */
625 outbuf
[buflen
++] = 0x80; /* unit serial number */
627 outbuf
[buflen
++] = 0x83; /* device identification */
628 if (s
->qdev
.type
== TYPE_DISK
) {
629 outbuf
[buflen
++] = 0xb0; /* block limits */
630 outbuf
[buflen
++] = 0xb1; /* block device characteristics */
631 outbuf
[buflen
++] = 0xb2; /* thin provisioning */
635 case 0x80: /* Device serial number, optional */
640 trace_scsi_disk_emulate_vpd_page_80_not_supported();
644 l
= strlen(s
->serial
);
649 trace_scsi_disk_emulate_vpd_page_80(req
->cmd
.xfer
);
650 memcpy(outbuf
+ buflen
, s
->serial
, l
);
655 case 0x83: /* Device identification page, mandatory */
657 int id_len
= s
->device_id
? MIN(strlen(s
->device_id
), 255 - 8) : 0;
659 trace_scsi_disk_emulate_vpd_page_83(req
->cmd
.xfer
);
662 outbuf
[buflen
++] = 0x2; /* ASCII */
663 outbuf
[buflen
++] = 0; /* not officially assigned */
664 outbuf
[buflen
++] = 0; /* reserved */
665 outbuf
[buflen
++] = id_len
; /* length of data following */
666 memcpy(outbuf
+ buflen
, s
->device_id
, id_len
);
671 outbuf
[buflen
++] = 0x1; /* Binary */
672 outbuf
[buflen
++] = 0x3; /* NAA */
673 outbuf
[buflen
++] = 0; /* reserved */
674 outbuf
[buflen
++] = 8;
675 stq_be_p(&outbuf
[buflen
], s
->qdev
.wwn
);
679 if (s
->qdev
.port_wwn
) {
680 outbuf
[buflen
++] = 0x61; /* SAS / Binary */
681 outbuf
[buflen
++] = 0x93; /* PIV / Target port / NAA */
682 outbuf
[buflen
++] = 0; /* reserved */
683 outbuf
[buflen
++] = 8;
684 stq_be_p(&outbuf
[buflen
], s
->qdev
.port_wwn
);
689 outbuf
[buflen
++] = 0x61; /* SAS / Binary */
691 /* PIV/Target port/relative target port */
692 outbuf
[buflen
++] = 0x94;
694 outbuf
[buflen
++] = 0; /* reserved */
695 outbuf
[buflen
++] = 4;
696 stw_be_p(&outbuf
[buflen
+ 2], s
->port_index
);
701 case 0xb0: /* block limits */
703 SCSIBlockLimits bl
= {};
705 if (s
->qdev
.type
== TYPE_ROM
) {
706 trace_scsi_disk_emulate_vpd_page_b0_not_supported();
711 s
->qdev
.conf
.discard_granularity
/ s
->qdev
.blocksize
;
713 s
->qdev
.conf
.min_io_size
/ s
->qdev
.blocksize
;
715 s
->qdev
.conf
.opt_io_size
/ s
->qdev
.blocksize
;
716 bl
.max_unmap_sectors
=
717 s
->max_unmap_size
/ s
->qdev
.blocksize
;
719 s
->max_io_size
/ s
->qdev
.blocksize
;
720 /* 255 descriptors fit in 4 KiB with an 8-byte header */
721 bl
.max_unmap_descr
= 255;
723 if (s
->qdev
.type
== TYPE_DISK
) {
724 int max_transfer_blk
= blk_get_max_transfer(s
->qdev
.conf
.blk
);
725 int max_io_sectors_blk
=
726 max_transfer_blk
/ s
->qdev
.blocksize
;
729 MIN_NON_ZERO(max_io_sectors_blk
, bl
.max_io_sectors
);
731 buflen
+= scsi_emulate_block_limits(outbuf
+ buflen
, &bl
);
734 case 0xb1: /* block device characteristics */
737 outbuf
[4] = (s
->rotation_rate
>> 8) & 0xff;
738 outbuf
[5] = s
->rotation_rate
& 0xff;
739 outbuf
[6] = 0; /* PRODUCT TYPE */
740 outbuf
[7] = 0; /* WABEREQ | WACEREQ | NOMINAL FORM FACTOR */
741 outbuf
[8] = 0; /* VBULS */
744 case 0xb2: /* thin provisioning */
748 outbuf
[5] = 0xe0; /* unmap & write_same 10/16 all supported */
749 outbuf
[6] = s
->qdev
.conf
.discard_granularity
? 2 : 1;
757 assert(buflen
- start
<= 255);
758 outbuf
[start
- 1] = buflen
- start
;
762 static int scsi_disk_emulate_inquiry(SCSIRequest
*req
, uint8_t *outbuf
)
764 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
767 if (req
->cmd
.buf
[1] & 0x1) {
768 /* Vital product data */
769 return scsi_disk_emulate_vpd_page(req
, outbuf
);
772 /* Standard INQUIRY data */
773 if (req
->cmd
.buf
[2] != 0) {
778 buflen
= req
->cmd
.xfer
;
779 if (buflen
> SCSI_MAX_INQUIRY_LEN
) {
780 buflen
= SCSI_MAX_INQUIRY_LEN
;
783 outbuf
[0] = s
->qdev
.type
& 0x1f;
784 outbuf
[1] = (s
->features
& (1 << SCSI_DISK_F_REMOVABLE
)) ? 0x80 : 0;
786 strpadcpy((char *) &outbuf
[16], 16, s
->product
, ' ');
787 strpadcpy((char *) &outbuf
[8], 8, s
->vendor
, ' ');
789 memset(&outbuf
[32], 0, 4);
790 memcpy(&outbuf
[32], s
->version
, MIN(4, strlen(s
->version
)));
792 * We claim conformance to SPC-3, which is required for guests
793 * to ask for modern features like READ CAPACITY(16) or the
794 * block characteristics VPD page by default. Not all of SPC-3
795 * is actually implemented, but we're good enough.
797 outbuf
[2] = s
->qdev
.default_scsi_version
;
798 outbuf
[3] = 2 | 0x10; /* Format 2, HiSup */
801 outbuf
[4] = buflen
- 5; /* Additional Length = (Len - 1) - 4 */
803 /* If the allocation length of CDB is too small,
804 the additional length is not adjusted */
808 /* Sync data transfer and TCQ. */
809 outbuf
[7] = 0x10 | (req
->bus
->info
->tcq
? 0x02 : 0);
813 static inline bool media_is_dvd(SCSIDiskState
*s
)
816 if (s
->qdev
.type
!= TYPE_ROM
) {
819 if (!blk_is_available(s
->qdev
.conf
.blk
)) {
822 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
823 return nb_sectors
> CD_MAX_SECTORS
;
826 static inline bool media_is_cd(SCSIDiskState
*s
)
829 if (s
->qdev
.type
!= TYPE_ROM
) {
832 if (!blk_is_available(s
->qdev
.conf
.blk
)) {
835 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
836 return nb_sectors
<= CD_MAX_SECTORS
;
839 static int scsi_read_disc_information(SCSIDiskState
*s
, SCSIDiskReq
*r
,
842 uint8_t type
= r
->req
.cmd
.buf
[1] & 7;
844 if (s
->qdev
.type
!= TYPE_ROM
) {
848 /* Types 1/2 are only defined for Blu-Ray. */
850 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
854 memset(outbuf
, 0, 34);
856 outbuf
[2] = 0xe; /* last session complete, disc finalized */
857 outbuf
[3] = 1; /* first track on disc */
858 outbuf
[4] = 1; /* # of sessions */
859 outbuf
[5] = 1; /* first track of last session */
860 outbuf
[6] = 1; /* last track of last session */
861 outbuf
[7] = 0x20; /* unrestricted use */
862 outbuf
[8] = 0x00; /* CD-ROM or DVD-ROM */
863 /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
864 /* 12-23: not meaningful for CD-ROM or DVD-ROM */
865 /* 24-31: disc bar code */
866 /* 32: disc application code */
867 /* 33: number of OPC tables */
872 static int scsi_read_dvd_structure(SCSIDiskState
*s
, SCSIDiskReq
*r
,
875 static const int rds_caps_size
[5] = {
882 uint8_t media
= r
->req
.cmd
.buf
[1];
883 uint8_t layer
= r
->req
.cmd
.buf
[6];
884 uint8_t format
= r
->req
.cmd
.buf
[7];
887 if (s
->qdev
.type
!= TYPE_ROM
) {
891 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
895 if (format
!= 0xff) {
896 if (!blk_is_available(s
->qdev
.conf
.blk
)) {
897 scsi_check_condition(r
, SENSE_CODE(NO_MEDIUM
));
900 if (media_is_cd(s
)) {
901 scsi_check_condition(r
, SENSE_CODE(INCOMPATIBLE_FORMAT
));
904 if (format
>= ARRAY_SIZE(rds_caps_size
)) {
907 size
= rds_caps_size
[format
];
908 memset(outbuf
, 0, size
);
913 /* Physical format information */
918 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
920 outbuf
[4] = 1; /* DVD-ROM, part version 1 */
921 outbuf
[5] = 0xf; /* 120mm disc, minimum rate unspecified */
922 outbuf
[6] = 1; /* one layer, read-only (per MMC-2 spec) */
923 outbuf
[7] = 0; /* default densities */
925 stl_be_p(&outbuf
[12], (nb_sectors
>> 2) - 1); /* end sector */
926 stl_be_p(&outbuf
[16], (nb_sectors
>> 2) - 1); /* l0 end sector */
930 case 0x01: /* DVD copyright information, all zeros */
933 case 0x03: /* BCA information - invalid field for no BCA info */
936 case 0x04: /* DVD disc manufacturing information, all zeros */
939 case 0xff: { /* List capabilities */
942 for (i
= 0; i
< ARRAY_SIZE(rds_caps_size
); i
++) {
943 if (!rds_caps_size
[i
]) {
947 outbuf
[size
+ 1] = 0x40; /* Not writable, readable */
948 stw_be_p(&outbuf
[size
+ 2], rds_caps_size
[i
]);
958 /* Size of buffer, not including 2 byte size field */
959 stw_be_p(outbuf
, size
- 2);
966 static int scsi_event_status_media(SCSIDiskState
*s
, uint8_t *outbuf
)
968 uint8_t event_code
, media_status
;
972 media_status
= MS_TRAY_OPEN
;
973 } else if (blk_is_inserted(s
->qdev
.conf
.blk
)) {
974 media_status
= MS_MEDIA_PRESENT
;
977 /* Event notification descriptor */
978 event_code
= MEC_NO_CHANGE
;
979 if (media_status
!= MS_TRAY_OPEN
) {
980 if (s
->media_event
) {
981 event_code
= MEC_NEW_MEDIA
;
982 s
->media_event
= false;
983 } else if (s
->eject_request
) {
984 event_code
= MEC_EJECT_REQUESTED
;
985 s
->eject_request
= false;
989 outbuf
[0] = event_code
;
990 outbuf
[1] = media_status
;
992 /* These fields are reserved, just clear them. */
998 static int scsi_get_event_status_notification(SCSIDiskState
*s
, SCSIDiskReq
*r
,
1002 uint8_t *buf
= r
->req
.cmd
.buf
;
1003 uint8_t notification_class_request
= buf
[4];
1004 if (s
->qdev
.type
!= TYPE_ROM
) {
1007 if ((buf
[1] & 1) == 0) {
1013 outbuf
[0] = outbuf
[1] = 0;
1014 outbuf
[3] = 1 << GESN_MEDIA
; /* supported events */
1015 if (notification_class_request
& (1 << GESN_MEDIA
)) {
1016 outbuf
[2] = GESN_MEDIA
;
1017 size
+= scsi_event_status_media(s
, &outbuf
[size
]);
1021 stw_be_p(outbuf
, size
- 4);
1025 static int scsi_get_configuration(SCSIDiskState
*s
, uint8_t *outbuf
)
1029 if (s
->qdev
.type
!= TYPE_ROM
) {
1033 if (media_is_dvd(s
)) {
1034 current
= MMC_PROFILE_DVD_ROM
;
1035 } else if (media_is_cd(s
)) {
1036 current
= MMC_PROFILE_CD_ROM
;
1038 current
= MMC_PROFILE_NONE
;
1041 memset(outbuf
, 0, 40);
1042 stl_be_p(&outbuf
[0], 36); /* Bytes after the data length field */
1043 stw_be_p(&outbuf
[6], current
);
1044 /* outbuf[8] - outbuf[19]: Feature 0 - Profile list */
1045 outbuf
[10] = 0x03; /* persistent, current */
1046 outbuf
[11] = 8; /* two profiles */
1047 stw_be_p(&outbuf
[12], MMC_PROFILE_DVD_ROM
);
1048 outbuf
[14] = (current
== MMC_PROFILE_DVD_ROM
);
1049 stw_be_p(&outbuf
[16], MMC_PROFILE_CD_ROM
);
1050 outbuf
[18] = (current
== MMC_PROFILE_CD_ROM
);
1051 /* outbuf[20] - outbuf[31]: Feature 1 - Core feature */
1052 stw_be_p(&outbuf
[20], 1);
1053 outbuf
[22] = 0x08 | 0x03; /* version 2, persistent, current */
1055 stl_be_p(&outbuf
[24], 1); /* SCSI */
1056 outbuf
[28] = 1; /* DBE = 1, mandatory */
1057 /* outbuf[32] - outbuf[39]: Feature 3 - Removable media feature */
1058 stw_be_p(&outbuf
[32], 3);
1059 outbuf
[34] = 0x08 | 0x03; /* version 2, persistent, current */
1061 outbuf
[36] = 0x39; /* tray, load=1, eject=1, unlocked at powerup, lock=1 */
1062 /* TODO: Random readable, CD read, DVD read, drive serial number,
1067 static int scsi_emulate_mechanism_status(SCSIDiskState
*s
, uint8_t *outbuf
)
1069 if (s
->qdev
.type
!= TYPE_ROM
) {
1072 memset(outbuf
, 0, 8);
1073 outbuf
[5] = 1; /* CD-ROM */
1077 static int mode_sense_page(SCSIDiskState
*s
, int page
, uint8_t **p_outbuf
,
1080 static const int mode_sense_valid
[0x3f] = {
1081 [MODE_PAGE_HD_GEOMETRY
] = (1 << TYPE_DISK
),
1082 [MODE_PAGE_FLEXIBLE_DISK_GEOMETRY
] = (1 << TYPE_DISK
),
1083 [MODE_PAGE_CACHING
] = (1 << TYPE_DISK
) | (1 << TYPE_ROM
),
1084 [MODE_PAGE_R_W_ERROR
] = (1 << TYPE_DISK
) | (1 << TYPE_ROM
),
1085 [MODE_PAGE_AUDIO_CTL
] = (1 << TYPE_ROM
),
1086 [MODE_PAGE_CAPABILITIES
] = (1 << TYPE_ROM
),
1089 uint8_t *p
= *p_outbuf
+ 2;
1092 assert(page
< ARRAY_SIZE(mode_sense_valid
));
1093 if ((mode_sense_valid
[page
] & (1 << s
->qdev
.type
)) == 0) {
1098 * If Changeable Values are requested, a mask denoting those mode parameters
1099 * that are changeable shall be returned. As we currently don't support
1100 * parameter changes via MODE_SELECT all bits are returned set to zero.
1101 * The buffer was already menset to zero by the caller of this function.
1103 * The offsets here are off by two compared to the descriptions in the
1104 * SCSI specs, because those include a 2-byte header. This is unfortunate,
1105 * but it is done so that offsets are consistent within our implementation
1106 * of MODE SENSE and MODE SELECT. MODE SELECT has to deal with both
1107 * 2-byte and 4-byte headers.
1110 case MODE_PAGE_HD_GEOMETRY
:
1112 if (page_control
== 1) { /* Changeable Values */
1115 /* if a geometry hint is available, use it */
1116 p
[0] = (s
->qdev
.conf
.cyls
>> 16) & 0xff;
1117 p
[1] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1118 p
[2] = s
->qdev
.conf
.cyls
& 0xff;
1119 p
[3] = s
->qdev
.conf
.heads
& 0xff;
1120 /* Write precomp start cylinder, disabled */
1121 p
[4] = (s
->qdev
.conf
.cyls
>> 16) & 0xff;
1122 p
[5] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1123 p
[6] = s
->qdev
.conf
.cyls
& 0xff;
1124 /* Reduced current start cylinder, disabled */
1125 p
[7] = (s
->qdev
.conf
.cyls
>> 16) & 0xff;
1126 p
[8] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1127 p
[9] = s
->qdev
.conf
.cyls
& 0xff;
1128 /* Device step rate [ns], 200ns */
1131 /* Landing zone cylinder */
1135 /* Medium rotation rate [rpm], 5400 rpm */
1136 p
[18] = (5400 >> 8) & 0xff;
1137 p
[19] = 5400 & 0xff;
1140 case MODE_PAGE_FLEXIBLE_DISK_GEOMETRY
:
1142 if (page_control
== 1) { /* Changeable Values */
1145 /* Transfer rate [kbit/s], 5Mbit/s */
1148 /* if a geometry hint is available, use it */
1149 p
[2] = s
->qdev
.conf
.heads
& 0xff;
1150 p
[3] = s
->qdev
.conf
.secs
& 0xff;
1151 p
[4] = s
->qdev
.blocksize
>> 8;
1152 p
[6] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1153 p
[7] = s
->qdev
.conf
.cyls
& 0xff;
1154 /* Write precomp start cylinder, disabled */
1155 p
[8] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1156 p
[9] = s
->qdev
.conf
.cyls
& 0xff;
1157 /* Reduced current start cylinder, disabled */
1158 p
[10] = (s
->qdev
.conf
.cyls
>> 8) & 0xff;
1159 p
[11] = s
->qdev
.conf
.cyls
& 0xff;
1160 /* Device step rate [100us], 100us */
1163 /* Device step pulse width [us], 1us */
1165 /* Device head settle delay [100us], 100us */
1168 /* Motor on delay [0.1s], 0.1s */
1170 /* Motor off delay [0.1s], 0.1s */
1172 /* Medium rotation rate [rpm], 5400 rpm */
1173 p
[26] = (5400 >> 8) & 0xff;
1174 p
[27] = 5400 & 0xff;
1177 case MODE_PAGE_CACHING
:
1179 if (page_control
== 1 || /* Changeable Values */
1180 blk_enable_write_cache(s
->qdev
.conf
.blk
)) {
1185 case MODE_PAGE_R_W_ERROR
:
1187 if (page_control
== 1) { /* Changeable Values */
1190 p
[0] = 0x80; /* Automatic Write Reallocation Enabled */
1191 if (s
->qdev
.type
== TYPE_ROM
) {
1192 p
[1] = 0x20; /* Read Retry Count */
1196 case MODE_PAGE_AUDIO_CTL
:
1200 case MODE_PAGE_CAPABILITIES
:
1202 if (page_control
== 1) { /* Changeable Values */
1206 p
[0] = 0x3b; /* CD-R & CD-RW read */
1207 p
[1] = 0; /* Writing not supported */
1208 p
[2] = 0x7f; /* Audio, composite, digital out,
1209 mode 2 form 1&2, multi session */
1210 p
[3] = 0xff; /* CD DA, DA accurate, RW supported,
1211 RW corrected, C2 errors, ISRC,
1213 p
[4] = 0x2d | (s
->tray_locked
? 2 : 0);
1214 /* Locking supported, jumper present, eject, tray */
1215 p
[5] = 0; /* no volume & mute control, no
1217 p
[6] = (50 * 176) >> 8; /* 50x read speed */
1218 p
[7] = (50 * 176) & 0xff;
1219 p
[8] = 2 >> 8; /* Two volume levels */
1221 p
[10] = 2048 >> 8; /* 2M buffer */
1222 p
[11] = 2048 & 0xff;
1223 p
[12] = (16 * 176) >> 8; /* 16x read speed current */
1224 p
[13] = (16 * 176) & 0xff;
1225 p
[16] = (16 * 176) >> 8; /* 16x write speed */
1226 p
[17] = (16 * 176) & 0xff;
1227 p
[18] = (16 * 176) >> 8; /* 16x write speed current */
1228 p
[19] = (16 * 176) & 0xff;
1235 assert(length
< 256);
1236 (*p_outbuf
)[0] = page
;
1237 (*p_outbuf
)[1] = length
;
1238 *p_outbuf
+= length
+ 2;
1242 static int scsi_disk_emulate_mode_sense(SCSIDiskReq
*r
, uint8_t *outbuf
)
1244 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1245 uint64_t nb_sectors
;
1247 int page
, buflen
, ret
, page_control
;
1249 uint8_t dev_specific_param
;
1251 dbd
= (r
->req
.cmd
.buf
[1] & 0x8) != 0;
1252 page
= r
->req
.cmd
.buf
[2] & 0x3f;
1253 page_control
= (r
->req
.cmd
.buf
[2] & 0xc0) >> 6;
1255 trace_scsi_disk_emulate_mode_sense((r
->req
.cmd
.buf
[0] == MODE_SENSE
) ? 6 :
1256 10, page
, r
->req
.cmd
.xfer
, page_control
);
1257 memset(outbuf
, 0, r
->req
.cmd
.xfer
);
1260 if (s
->qdev
.type
== TYPE_DISK
) {
1261 dev_specific_param
= s
->features
& (1 << SCSI_DISK_F_DPOFUA
) ? 0x10 : 0;
1262 if (!blk_is_writable(s
->qdev
.conf
.blk
)) {
1263 dev_specific_param
|= 0x80; /* Readonly. */
1266 /* MMC prescribes that CD/DVD drives have no block descriptors,
1267 * and defines no device-specific parameter. */
1268 dev_specific_param
= 0x00;
1272 if (r
->req
.cmd
.buf
[0] == MODE_SENSE
) {
1273 p
[1] = 0; /* Default media type. */
1274 p
[2] = dev_specific_param
;
1275 p
[3] = 0; /* Block descriptor length. */
1277 } else { /* MODE_SENSE_10 */
1278 p
[2] = 0; /* Default media type. */
1279 p
[3] = dev_specific_param
;
1280 p
[6] = p
[7] = 0; /* Block descriptor length. */
1284 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
1285 if (!dbd
&& nb_sectors
) {
1286 if (r
->req
.cmd
.buf
[0] == MODE_SENSE
) {
1287 outbuf
[3] = 8; /* Block descriptor length */
1288 } else { /* MODE_SENSE_10 */
1289 outbuf
[7] = 8; /* Block descriptor length */
1291 nb_sectors
/= (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
1292 if (nb_sectors
> 0xffffff) {
1295 p
[0] = 0; /* media density code */
1296 p
[1] = (nb_sectors
>> 16) & 0xff;
1297 p
[2] = (nb_sectors
>> 8) & 0xff;
1298 p
[3] = nb_sectors
& 0xff;
1299 p
[4] = 0; /* reserved */
1300 p
[5] = 0; /* bytes 5-7 are the sector size in bytes */
1301 p
[6] = s
->qdev
.blocksize
>> 8;
1306 if (page_control
== 3) {
1308 scsi_check_condition(r
, SENSE_CODE(SAVING_PARAMS_NOT_SUPPORTED
));
1313 for (page
= 0; page
<= 0x3e; page
++) {
1314 mode_sense_page(s
, page
, &p
, page_control
);
1317 ret
= mode_sense_page(s
, page
, &p
, page_control
);
1323 buflen
= p
- outbuf
;
1325 * The mode data length field specifies the length in bytes of the
1326 * following data that is available to be transferred. The mode data
1327 * length does not include itself.
1329 if (r
->req
.cmd
.buf
[0] == MODE_SENSE
) {
1330 outbuf
[0] = buflen
- 1;
1331 } else { /* MODE_SENSE_10 */
1332 outbuf
[0] = ((buflen
- 2) >> 8) & 0xff;
1333 outbuf
[1] = (buflen
- 2) & 0xff;
1338 static int scsi_disk_emulate_read_toc(SCSIRequest
*req
, uint8_t *outbuf
)
1340 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
1341 int start_track
, format
, msf
, toclen
;
1342 uint64_t nb_sectors
;
1344 msf
= req
->cmd
.buf
[1] & 2;
1345 format
= req
->cmd
.buf
[2] & 0xf;
1346 start_track
= req
->cmd
.buf
[6];
1347 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
1348 trace_scsi_disk_emulate_read_toc(start_track
, format
, msf
>> 1);
1349 nb_sectors
/= s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
;
1352 toclen
= cdrom_read_toc(nb_sectors
, outbuf
, msf
, start_track
);
1355 /* multi session : only a single session defined */
1357 memset(outbuf
, 0, 12);
1363 toclen
= cdrom_read_toc_raw(nb_sectors
, outbuf
, msf
, start_track
);
1371 static int scsi_disk_emulate_start_stop(SCSIDiskReq
*r
)
1373 SCSIRequest
*req
= &r
->req
;
1374 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
1375 bool start
= req
->cmd
.buf
[4] & 1;
1376 bool loej
= req
->cmd
.buf
[4] & 2; /* load on start, eject on !start */
1377 int pwrcnd
= req
->cmd
.buf
[4] & 0xf0;
1380 /* eject/load only happens for power condition == 0 */
1384 if ((s
->features
& (1 << SCSI_DISK_F_REMOVABLE
)) && loej
) {
1385 if (!start
&& !s
->tray_open
&& s
->tray_locked
) {
1386 scsi_check_condition(r
,
1387 blk_is_inserted(s
->qdev
.conf
.blk
)
1388 ? SENSE_CODE(ILLEGAL_REQ_REMOVAL_PREVENTED
)
1389 : SENSE_CODE(NOT_READY_REMOVAL_PREVENTED
));
1393 if (s
->tray_open
!= !start
) {
1394 blk_eject(s
->qdev
.conf
.blk
, !start
);
1395 s
->tray_open
= !start
;
1401 static void scsi_disk_emulate_read_data(SCSIRequest
*req
)
1403 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
1404 int buflen
= r
->iov
.iov_len
;
1407 trace_scsi_disk_emulate_read_data(buflen
);
1410 scsi_req_data(&r
->req
, buflen
);
1414 /* This also clears the sense buffer for REQUEST SENSE. */
1415 scsi_req_complete(&r
->req
, GOOD
);
1418 static int scsi_disk_check_mode_select(SCSIDiskState
*s
, int page
,
1419 uint8_t *inbuf
, int inlen
)
1421 uint8_t mode_current
[SCSI_MAX_MODE_LEN
];
1422 uint8_t mode_changeable
[SCSI_MAX_MODE_LEN
];
1424 int len
, expected_len
, changeable_len
, i
;
1426 /* The input buffer does not include the page header, so it is
1429 expected_len
= inlen
+ 2;
1430 if (expected_len
> SCSI_MAX_MODE_LEN
) {
1434 /* MODE_PAGE_ALLS is only valid for MODE SENSE commands */
1435 if (page
== MODE_PAGE_ALLS
) {
1440 memset(mode_current
, 0, inlen
+ 2);
1441 len
= mode_sense_page(s
, page
, &p
, 0);
1442 if (len
< 0 || len
!= expected_len
) {
1446 p
= mode_changeable
;
1447 memset(mode_changeable
, 0, inlen
+ 2);
1448 changeable_len
= mode_sense_page(s
, page
, &p
, 1);
1449 assert(changeable_len
== len
);
1451 /* Check that unchangeable bits are the same as what MODE SENSE
1454 for (i
= 2; i
< len
; i
++) {
1455 if (((mode_current
[i
] ^ inbuf
[i
- 2]) & ~mode_changeable
[i
]) != 0) {
1462 static void scsi_disk_apply_mode_select(SCSIDiskState
*s
, int page
, uint8_t *p
)
1465 case MODE_PAGE_CACHING
:
1466 blk_set_enable_write_cache(s
->qdev
.conf
.blk
, (p
[0] & 4) != 0);
1474 static int mode_select_pages(SCSIDiskReq
*r
, uint8_t *p
, int len
, bool change
)
1476 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1479 int page
, subpage
, page_len
;
1481 /* Parse both possible formats for the mode page headers. */
1485 goto invalid_param_len
;
1488 page_len
= lduw_be_p(&p
[2]);
1493 goto invalid_param_len
;
1504 if (page_len
> len
) {
1505 goto invalid_param_len
;
1509 if (scsi_disk_check_mode_select(s
, page
, p
, page_len
) < 0) {
1513 scsi_disk_apply_mode_select(s
, page
, p
);
1522 scsi_check_condition(r
, SENSE_CODE(INVALID_PARAM
));
1526 scsi_check_condition(r
, SENSE_CODE(INVALID_PARAM_LEN
));
1530 static void scsi_disk_emulate_mode_select(SCSIDiskReq
*r
, uint8_t *inbuf
)
1532 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1534 int cmd
= r
->req
.cmd
.buf
[0];
1535 int len
= r
->req
.cmd
.xfer
;
1536 int hdr_len
= (cmd
== MODE_SELECT
? 4 : 8);
1540 /* We only support PF=1, SP=0. */
1541 if ((r
->req
.cmd
.buf
[1] & 0x11) != 0x10) {
1545 if (len
< hdr_len
) {
1546 goto invalid_param_len
;
1549 bd_len
= (cmd
== MODE_SELECT
? p
[3] : lduw_be_p(&p
[6]));
1553 goto invalid_param_len
;
1555 if (bd_len
!= 0 && bd_len
!= 8) {
1562 /* Ensure no change is made if there is an error! */
1563 for (pass
= 0; pass
< 2; pass
++) {
1564 if (mode_select_pages(r
, p
, len
, pass
== 1) < 0) {
1569 if (!blk_enable_write_cache(s
->qdev
.conf
.blk
)) {
1570 /* The request is used as the AIO opaque value, so add a ref. */
1571 scsi_req_ref(&r
->req
);
1572 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
, 0,
1574 r
->req
.aiocb
= blk_aio_flush(s
->qdev
.conf
.blk
, scsi_aio_complete
, r
);
1578 scsi_req_complete(&r
->req
, GOOD
);
1582 scsi_check_condition(r
, SENSE_CODE(INVALID_PARAM
));
1586 scsi_check_condition(r
, SENSE_CODE(INVALID_PARAM_LEN
));
1590 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
1593 /* sector_num and nb_sectors expected to be in qdev blocksize */
1594 static inline bool check_lba_range(SCSIDiskState
*s
,
1595 uint64_t sector_num
, uint32_t nb_sectors
)
1598 * The first line tests that no overflow happens when computing the last
1599 * sector. The second line tests that the last accessed sector is in
1602 * Careful, the computations should not underflow for nb_sectors == 0,
1603 * and a 0-block read to the first LBA beyond the end of device is
1606 return (sector_num
<= sector_num
+ nb_sectors
&&
1607 sector_num
+ nb_sectors
<= s
->qdev
.max_lba
+ 1);
1610 typedef struct UnmapCBData
{
1616 static void scsi_unmap_complete(void *opaque
, int ret
);
1618 static void scsi_unmap_complete_noio(UnmapCBData
*data
, int ret
)
1620 SCSIDiskReq
*r
= data
->r
;
1621 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1623 assert(r
->req
.aiocb
== NULL
);
1625 if (data
->count
> 0) {
1626 uint64_t sector_num
= ldq_be_p(&data
->inbuf
[0]);
1627 uint32_t nb_sectors
= ldl_be_p(&data
->inbuf
[8]) & 0xffffffffULL
;
1628 r
->sector
= sector_num
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
1629 r
->sector_count
= nb_sectors
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
1631 if (!check_lba_range(s
, sector_num
, nb_sectors
)) {
1632 block_acct_invalid(blk_get_stats(s
->qdev
.conf
.blk
),
1634 scsi_check_condition(r
, SENSE_CODE(LBA_OUT_OF_RANGE
));
1638 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
1639 r
->sector_count
* BDRV_SECTOR_SIZE
,
1642 r
->req
.aiocb
= blk_aio_pdiscard(s
->qdev
.conf
.blk
,
1643 r
->sector
* BDRV_SECTOR_SIZE
,
1644 r
->sector_count
* BDRV_SECTOR_SIZE
,
1645 scsi_unmap_complete
, data
);
1651 scsi_req_complete(&r
->req
, GOOD
);
1654 scsi_req_unref(&r
->req
);
1658 static void scsi_unmap_complete(void *opaque
, int ret
)
1660 UnmapCBData
*data
= opaque
;
1661 SCSIDiskReq
*r
= data
->r
;
1662 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1664 assert(r
->req
.aiocb
!= NULL
);
1665 r
->req
.aiocb
= NULL
;
1667 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
1668 if (scsi_disk_req_check_error(r
, ret
, true)) {
1669 scsi_req_unref(&r
->req
);
1672 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
1673 scsi_unmap_complete_noio(data
, ret
);
1675 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
1678 static void scsi_disk_emulate_unmap(SCSIDiskReq
*r
, uint8_t *inbuf
)
1680 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1682 int len
= r
->req
.cmd
.xfer
;
1685 /* Reject ANCHOR=1. */
1686 if (r
->req
.cmd
.buf
[1] & 0x1) {
1691 goto invalid_param_len
;
1693 if (len
< lduw_be_p(&p
[0]) + 2) {
1694 goto invalid_param_len
;
1696 if (len
< lduw_be_p(&p
[2]) + 8) {
1697 goto invalid_param_len
;
1699 if (lduw_be_p(&p
[2]) & 15) {
1700 goto invalid_param_len
;
1703 if (!blk_is_writable(s
->qdev
.conf
.blk
)) {
1704 block_acct_invalid(blk_get_stats(s
->qdev
.conf
.blk
), BLOCK_ACCT_UNMAP
);
1705 scsi_check_condition(r
, SENSE_CODE(WRITE_PROTECTED
));
1709 data
= g_new0(UnmapCBData
, 1);
1711 data
->inbuf
= &p
[8];
1712 data
->count
= lduw_be_p(&p
[2]) >> 4;
1714 /* The matching unref is in scsi_unmap_complete, before data is freed. */
1715 scsi_req_ref(&r
->req
);
1716 scsi_unmap_complete_noio(data
, 0);
1720 block_acct_invalid(blk_get_stats(s
->qdev
.conf
.blk
), BLOCK_ACCT_UNMAP
);
1721 scsi_check_condition(r
, SENSE_CODE(INVALID_PARAM_LEN
));
1725 block_acct_invalid(blk_get_stats(s
->qdev
.conf
.blk
), BLOCK_ACCT_UNMAP
);
1726 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
1729 typedef struct WriteSameCBData
{
1737 static void scsi_write_same_complete(void *opaque
, int ret
)
1739 WriteSameCBData
*data
= opaque
;
1740 SCSIDiskReq
*r
= data
->r
;
1741 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
1743 assert(r
->req
.aiocb
!= NULL
);
1744 r
->req
.aiocb
= NULL
;
1745 aio_context_acquire(blk_get_aio_context(s
->qdev
.conf
.blk
));
1746 if (scsi_disk_req_check_error(r
, ret
, true)) {
1750 block_acct_done(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
);
1752 data
->nb_sectors
-= data
->iov
.iov_len
/ BDRV_SECTOR_SIZE
;
1753 data
->sector
+= data
->iov
.iov_len
/ BDRV_SECTOR_SIZE
;
1754 data
->iov
.iov_len
= MIN(data
->nb_sectors
* BDRV_SECTOR_SIZE
,
1756 if (data
->iov
.iov_len
) {
1757 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
1758 data
->iov
.iov_len
, BLOCK_ACCT_WRITE
);
1759 /* Reinitialize qiov, to handle unaligned WRITE SAME request
1760 * where final qiov may need smaller size */
1761 qemu_iovec_init_external(&data
->qiov
, &data
->iov
, 1);
1762 r
->req
.aiocb
= blk_aio_pwritev(s
->qdev
.conf
.blk
,
1763 data
->sector
<< BDRV_SECTOR_BITS
,
1765 scsi_write_same_complete
, data
);
1766 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
1770 scsi_req_complete(&r
->req
, GOOD
);
1773 scsi_req_unref(&r
->req
);
1774 qemu_vfree(data
->iov
.iov_base
);
1776 aio_context_release(blk_get_aio_context(s
->qdev
.conf
.blk
));
1779 static void scsi_disk_emulate_write_same(SCSIDiskReq
*r
, uint8_t *inbuf
)
1781 SCSIRequest
*req
= &r
->req
;
1782 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
1783 uint32_t nb_sectors
= scsi_data_cdb_xfer(r
->req
.cmd
.buf
);
1784 WriteSameCBData
*data
;
1788 /* Fail if PBDATA=1 or LBDATA=1 or ANCHOR=1. */
1789 if (nb_sectors
== 0 || (req
->cmd
.buf
[1] & 0x16)) {
1790 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
1794 if (!blk_is_writable(s
->qdev
.conf
.blk
)) {
1795 scsi_check_condition(r
, SENSE_CODE(WRITE_PROTECTED
));
1798 if (!check_lba_range(s
, r
->req
.cmd
.lba
, nb_sectors
)) {
1799 scsi_check_condition(r
, SENSE_CODE(LBA_OUT_OF_RANGE
));
1803 if ((req
->cmd
.buf
[1] & 0x1) || buffer_is_zero(inbuf
, s
->qdev
.blocksize
)) {
1804 int flags
= (req
->cmd
.buf
[1] & 0x8) ? BDRV_REQ_MAY_UNMAP
: 0;
1806 /* The request is used as the AIO opaque value, so add a ref. */
1807 scsi_req_ref(&r
->req
);
1808 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
1809 nb_sectors
* s
->qdev
.blocksize
,
1811 r
->req
.aiocb
= blk_aio_pwrite_zeroes(s
->qdev
.conf
.blk
,
1812 r
->req
.cmd
.lba
* s
->qdev
.blocksize
,
1813 nb_sectors
* s
->qdev
.blocksize
,
1814 flags
, scsi_aio_complete
, r
);
1818 data
= g_new0(WriteSameCBData
, 1);
1820 data
->sector
= r
->req
.cmd
.lba
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
1821 data
->nb_sectors
= nb_sectors
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
1822 data
->iov
.iov_len
= MIN(data
->nb_sectors
* BDRV_SECTOR_SIZE
,
1823 SCSI_WRITE_SAME_MAX
);
1824 data
->iov
.iov_base
= buf
= blk_blockalign(s
->qdev
.conf
.blk
,
1826 qemu_iovec_init_external(&data
->qiov
, &data
->iov
, 1);
1828 for (i
= 0; i
< data
->iov
.iov_len
; i
+= s
->qdev
.blocksize
) {
1829 memcpy(&buf
[i
], inbuf
, s
->qdev
.blocksize
);
1832 scsi_req_ref(&r
->req
);
1833 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
,
1834 data
->iov
.iov_len
, BLOCK_ACCT_WRITE
);
1835 r
->req
.aiocb
= blk_aio_pwritev(s
->qdev
.conf
.blk
,
1836 data
->sector
<< BDRV_SECTOR_BITS
,
1838 scsi_write_same_complete
, data
);
1841 static void scsi_disk_emulate_write_data(SCSIRequest
*req
)
1843 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
1845 if (r
->iov
.iov_len
) {
1846 int buflen
= r
->iov
.iov_len
;
1847 trace_scsi_disk_emulate_write_data(buflen
);
1849 scsi_req_data(&r
->req
, buflen
);
1853 switch (req
->cmd
.buf
[0]) {
1855 case MODE_SELECT_10
:
1856 /* This also clears the sense buffer for REQUEST SENSE. */
1857 scsi_disk_emulate_mode_select(r
, r
->iov
.iov_base
);
1861 scsi_disk_emulate_unmap(r
, r
->iov
.iov_base
);
1867 if (r
->req
.status
== -1) {
1868 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
1874 scsi_disk_emulate_write_same(r
, r
->iov
.iov_base
);
1882 static int32_t scsi_disk_emulate_command(SCSIRequest
*req
, uint8_t *buf
)
1884 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
1885 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
1886 uint64_t nb_sectors
;
1890 switch (req
->cmd
.buf
[0]) {
1899 case ALLOW_MEDIUM_REMOVAL
:
1900 case GET_CONFIGURATION
:
1901 case GET_EVENT_STATUS_NOTIFICATION
:
1902 case MECHANISM_STATUS
:
1907 if (!blk_is_available(s
->qdev
.conf
.blk
)) {
1908 scsi_check_condition(r
, SENSE_CODE(NO_MEDIUM
));
1915 * FIXME: we shouldn't return anything bigger than 4k, but the code
1916 * requires the buffer to be as big as req->cmd.xfer in several
1917 * places. So, do not allow CDBs with a very large ALLOCATION
1918 * LENGTH. The real fix would be to modify scsi_read_data and
1919 * dma_buf_read, so that they return data beyond the buflen
1922 if (req
->cmd
.xfer
> 65536) {
1923 goto illegal_request
;
1925 r
->buflen
= MAX(4096, req
->cmd
.xfer
);
1927 if (!r
->iov
.iov_base
) {
1928 r
->iov
.iov_base
= blk_blockalign(s
->qdev
.conf
.blk
, r
->buflen
);
1931 outbuf
= r
->iov
.iov_base
;
1932 memset(outbuf
, 0, r
->buflen
);
1933 switch (req
->cmd
.buf
[0]) {
1934 case TEST_UNIT_READY
:
1935 assert(blk_is_available(s
->qdev
.conf
.blk
));
1938 buflen
= scsi_disk_emulate_inquiry(req
, outbuf
);
1940 goto illegal_request
;
1945 buflen
= scsi_disk_emulate_mode_sense(r
, outbuf
);
1947 goto illegal_request
;
1951 buflen
= scsi_disk_emulate_read_toc(req
, outbuf
);
1953 goto illegal_request
;
1957 if (req
->cmd
.buf
[1] & 1) {
1958 goto illegal_request
;
1962 if (req
->cmd
.buf
[1] & 3) {
1963 goto illegal_request
;
1967 if (req
->cmd
.buf
[1] & 1) {
1968 goto illegal_request
;
1972 if (req
->cmd
.buf
[1] & 3) {
1973 goto illegal_request
;
1977 if (scsi_disk_emulate_start_stop(r
) < 0) {
1981 case ALLOW_MEDIUM_REMOVAL
:
1982 s
->tray_locked
= req
->cmd
.buf
[4] & 1;
1983 blk_lock_medium(s
->qdev
.conf
.blk
, req
->cmd
.buf
[4] & 1);
1985 case READ_CAPACITY_10
:
1986 /* The normal LEN field for this command is zero. */
1987 memset(outbuf
, 0, 8);
1988 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
1990 scsi_check_condition(r
, SENSE_CODE(LUN_NOT_READY
));
1993 if ((req
->cmd
.buf
[8] & 1) == 0 && req
->cmd
.lba
) {
1994 goto illegal_request
;
1996 nb_sectors
/= s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
;
1997 /* Returned value is the address of the last sector. */
1999 /* Remember the new size for read/write sanity checking. */
2000 s
->qdev
.max_lba
= nb_sectors
;
2001 /* Clip to 2TB, instead of returning capacity modulo 2TB. */
2002 if (nb_sectors
> UINT32_MAX
) {
2003 nb_sectors
= UINT32_MAX
;
2005 outbuf
[0] = (nb_sectors
>> 24) & 0xff;
2006 outbuf
[1] = (nb_sectors
>> 16) & 0xff;
2007 outbuf
[2] = (nb_sectors
>> 8) & 0xff;
2008 outbuf
[3] = nb_sectors
& 0xff;
2011 outbuf
[6] = s
->qdev
.blocksize
>> 8;
2015 /* Just return "NO SENSE". */
2016 buflen
= scsi_convert_sense(NULL
, 0, outbuf
, r
->buflen
,
2017 (req
->cmd
.buf
[1] & 1) == 0);
2019 goto illegal_request
;
2022 case MECHANISM_STATUS
:
2023 buflen
= scsi_emulate_mechanism_status(s
, outbuf
);
2025 goto illegal_request
;
2028 case GET_CONFIGURATION
:
2029 buflen
= scsi_get_configuration(s
, outbuf
);
2031 goto illegal_request
;
2034 case GET_EVENT_STATUS_NOTIFICATION
:
2035 buflen
= scsi_get_event_status_notification(s
, r
, outbuf
);
2037 goto illegal_request
;
2040 case READ_DISC_INFORMATION
:
2041 buflen
= scsi_read_disc_information(s
, r
, outbuf
);
2043 goto illegal_request
;
2046 case READ_DVD_STRUCTURE
:
2047 buflen
= scsi_read_dvd_structure(s
, r
, outbuf
);
2049 goto illegal_request
;
2052 case SERVICE_ACTION_IN_16
:
2053 /* Service Action In subcommands. */
2054 if ((req
->cmd
.buf
[1] & 31) == SAI_READ_CAPACITY_16
) {
2055 trace_scsi_disk_emulate_command_SAI_16();
2056 memset(outbuf
, 0, req
->cmd
.xfer
);
2057 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
2059 scsi_check_condition(r
, SENSE_CODE(LUN_NOT_READY
));
2062 if ((req
->cmd
.buf
[14] & 1) == 0 && req
->cmd
.lba
) {
2063 goto illegal_request
;
2065 nb_sectors
/= s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
;
2066 /* Returned value is the address of the last sector. */
2068 /* Remember the new size for read/write sanity checking. */
2069 s
->qdev
.max_lba
= nb_sectors
;
2070 outbuf
[0] = (nb_sectors
>> 56) & 0xff;
2071 outbuf
[1] = (nb_sectors
>> 48) & 0xff;
2072 outbuf
[2] = (nb_sectors
>> 40) & 0xff;
2073 outbuf
[3] = (nb_sectors
>> 32) & 0xff;
2074 outbuf
[4] = (nb_sectors
>> 24) & 0xff;
2075 outbuf
[5] = (nb_sectors
>> 16) & 0xff;
2076 outbuf
[6] = (nb_sectors
>> 8) & 0xff;
2077 outbuf
[7] = nb_sectors
& 0xff;
2080 outbuf
[10] = s
->qdev
.blocksize
>> 8;
2083 outbuf
[13] = get_physical_block_exp(&s
->qdev
.conf
);
2085 /* set TPE bit if the format supports discard */
2086 if (s
->qdev
.conf
.discard_granularity
) {
2090 /* Protection, exponent and lowest lba field left blank. */
2093 trace_scsi_disk_emulate_command_SAI_unsupported();
2094 goto illegal_request
;
2095 case SYNCHRONIZE_CACHE
:
2096 /* The request is used as the AIO opaque value, so add a ref. */
2097 scsi_req_ref(&r
->req
);
2098 block_acct_start(blk_get_stats(s
->qdev
.conf
.blk
), &r
->acct
, 0,
2100 r
->req
.aiocb
= blk_aio_flush(s
->qdev
.conf
.blk
, scsi_aio_complete
, r
);
2103 trace_scsi_disk_emulate_command_SEEK_10(r
->req
.cmd
.lba
);
2104 if (r
->req
.cmd
.lba
> s
->qdev
.max_lba
) {
2109 trace_scsi_disk_emulate_command_MODE_SELECT(r
->req
.cmd
.xfer
);
2111 case MODE_SELECT_10
:
2112 trace_scsi_disk_emulate_command_MODE_SELECT_10(r
->req
.cmd
.xfer
);
2115 trace_scsi_disk_emulate_command_UNMAP(r
->req
.cmd
.xfer
);
2120 trace_scsi_disk_emulate_command_VERIFY((req
->cmd
.buf
[1] >> 1) & 3);
2121 if (req
->cmd
.buf
[1] & 6) {
2122 goto illegal_request
;
2127 trace_scsi_disk_emulate_command_WRITE_SAME(
2128 req
->cmd
.buf
[0] == WRITE_SAME_10
? 10 : 16, r
->req
.cmd
.xfer
);
2131 trace_scsi_disk_emulate_command_UNKNOWN(buf
[0],
2132 scsi_command_name(buf
[0]));
2133 scsi_check_condition(r
, SENSE_CODE(INVALID_OPCODE
));
2136 assert(!r
->req
.aiocb
);
2137 r
->iov
.iov_len
= MIN(r
->buflen
, req
->cmd
.xfer
);
2138 if (r
->iov
.iov_len
== 0) {
2139 scsi_req_complete(&r
->req
, GOOD
);
2141 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
2142 assert(r
->iov
.iov_len
== req
->cmd
.xfer
);
2143 return -r
->iov
.iov_len
;
2145 return r
->iov
.iov_len
;
2149 if (r
->req
.status
== -1) {
2150 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
2155 scsi_check_condition(r
, SENSE_CODE(LBA_OUT_OF_RANGE
));
2159 /* Execute a scsi command. Returns the length of the data expected by the
2160 command. This will be Positive for data transfers from the device
2161 (eg. disk reads), negative for transfers to the device (eg. disk writes),
2162 and zero if the command does not transfer any data. */
2164 static int32_t scsi_disk_dma_command(SCSIRequest
*req
, uint8_t *buf
)
2166 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
2167 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
2168 SCSIDiskClass
*sdc
= (SCSIDiskClass
*) object_get_class(OBJECT(s
));
2174 if (!blk_is_available(s
->qdev
.conf
.blk
)) {
2175 scsi_check_condition(r
, SENSE_CODE(NO_MEDIUM
));
2179 len
= scsi_data_cdb_xfer(r
->req
.cmd
.buf
);
2185 trace_scsi_disk_dma_command_READ(r
->req
.cmd
.lba
, len
);
2186 /* Protection information is not supported. For SCSI versions 2 and
2187 * older (as determined by snooping the guest's INQUIRY commands),
2188 * there is no RD/WR/VRPROTECT, so skip this check in these versions.
2190 if (s
->qdev
.scsi_version
> 2 && (r
->req
.cmd
.buf
[1] & 0xe0)) {
2191 goto illegal_request
;
2193 if (!check_lba_range(s
, r
->req
.cmd
.lba
, len
)) {
2196 r
->sector
= r
->req
.cmd
.lba
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
2197 r
->sector_count
= len
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
2203 case WRITE_VERIFY_10
:
2204 case WRITE_VERIFY_12
:
2205 case WRITE_VERIFY_16
:
2206 if (!blk_is_writable(s
->qdev
.conf
.blk
)) {
2207 scsi_check_condition(r
, SENSE_CODE(WRITE_PROTECTED
));
2210 trace_scsi_disk_dma_command_WRITE(
2211 (command
& 0xe) == 0xe ? "And Verify " : "",
2212 r
->req
.cmd
.lba
, len
);
2217 /* We get here only for BYTCHK == 0x01 and only for scsi-block.
2218 * As far as DMA is concerned, we can treat it the same as a write;
2219 * scsi_block_do_sgio will send VERIFY commands.
2221 if (s
->qdev
.scsi_version
> 2 && (r
->req
.cmd
.buf
[1] & 0xe0)) {
2222 goto illegal_request
;
2224 if (!check_lba_range(s
, r
->req
.cmd
.lba
, len
)) {
2227 r
->sector
= r
->req
.cmd
.lba
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
2228 r
->sector_count
= len
* (s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
);
2233 scsi_check_condition(r
, SENSE_CODE(INVALID_FIELD
));
2236 scsi_check_condition(r
, SENSE_CODE(LBA_OUT_OF_RANGE
));
2239 r
->need_fua_emulation
= sdc
->need_fua_emulation(&r
->req
.cmd
);
2240 if (r
->sector_count
== 0) {
2241 scsi_req_complete(&r
->req
, GOOD
);
2243 assert(r
->iov
.iov_len
== 0);
2244 if (r
->req
.cmd
.mode
== SCSI_XFER_TO_DEV
) {
2245 return -r
->sector_count
* BDRV_SECTOR_SIZE
;
2247 return r
->sector_count
* BDRV_SECTOR_SIZE
;
2251 static void scsi_disk_reset(DeviceState
*dev
)
2253 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
.qdev
, dev
);
2254 uint64_t nb_sectors
;
2256 scsi_device_purge_requests(&s
->qdev
, SENSE_CODE(RESET
));
2258 blk_get_geometry(s
->qdev
.conf
.blk
, &nb_sectors
);
2259 nb_sectors
/= s
->qdev
.blocksize
/ BDRV_SECTOR_SIZE
;
2263 s
->qdev
.max_lba
= nb_sectors
;
2264 /* reset tray statuses */
2268 s
->qdev
.scsi_version
= s
->qdev
.default_scsi_version
;
2271 static void scsi_disk_resize_cb(void *opaque
)
2273 SCSIDiskState
*s
= opaque
;
2275 /* SPC lists this sense code as available only for
2276 * direct-access devices.
2278 if (s
->qdev
.type
== TYPE_DISK
) {
2279 scsi_device_report_change(&s
->qdev
, SENSE_CODE(CAPACITY_CHANGED
));
2283 static void scsi_cd_change_media_cb(void *opaque
, bool load
, Error
**errp
)
2285 SCSIDiskState
*s
= opaque
;
2288 * When a CD gets changed, we have to report an ejected state and
2289 * then a loaded state to guests so that they detect tray
2290 * open/close and media change events. Guests that do not use
2291 * GET_EVENT_STATUS_NOTIFICATION to detect such tray open/close
2292 * states rely on this behavior.
2294 * media_changed governs the state machine used for unit attention
2295 * report. media_event is used by GET EVENT STATUS NOTIFICATION.
2297 s
->media_changed
= load
;
2298 s
->tray_open
= !load
;
2299 scsi_device_set_ua(&s
->qdev
, SENSE_CODE(UNIT_ATTENTION_NO_MEDIUM
));
2300 s
->media_event
= true;
2301 s
->eject_request
= false;
2304 static void scsi_cd_eject_request_cb(void *opaque
, bool force
)
2306 SCSIDiskState
*s
= opaque
;
2308 s
->eject_request
= true;
2310 s
->tray_locked
= false;
2314 static bool scsi_cd_is_tray_open(void *opaque
)
2316 return ((SCSIDiskState
*)opaque
)->tray_open
;
2319 static bool scsi_cd_is_medium_locked(void *opaque
)
2321 return ((SCSIDiskState
*)opaque
)->tray_locked
;
2324 static const BlockDevOps scsi_disk_removable_block_ops
= {
2325 .change_media_cb
= scsi_cd_change_media_cb
,
2326 .eject_request_cb
= scsi_cd_eject_request_cb
,
2327 .is_tray_open
= scsi_cd_is_tray_open
,
2328 .is_medium_locked
= scsi_cd_is_medium_locked
,
2330 .resize_cb
= scsi_disk_resize_cb
,
2333 static const BlockDevOps scsi_disk_block_ops
= {
2334 .resize_cb
= scsi_disk_resize_cb
,
2337 static void scsi_disk_unit_attention_reported(SCSIDevice
*dev
)
2339 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, dev
);
2340 if (s
->media_changed
) {
2341 s
->media_changed
= false;
2342 scsi_device_set_ua(&s
->qdev
, SENSE_CODE(MEDIUM_CHANGED
));
2346 static void scsi_realize(SCSIDevice
*dev
, Error
**errp
)
2348 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, dev
);
2351 if (!s
->qdev
.conf
.blk
) {
2352 error_setg(errp
, "drive property not set");
2356 if (!(s
->features
& (1 << SCSI_DISK_F_REMOVABLE
)) &&
2357 !blk_is_inserted(s
->qdev
.conf
.blk
)) {
2358 error_setg(errp
, "Device needs media, but drive is empty");
2362 if (!blkconf_blocksizes(&s
->qdev
.conf
, errp
)) {
2366 if (blk_get_aio_context(s
->qdev
.conf
.blk
) != qemu_get_aio_context() &&
2367 !s
->qdev
.hba_supports_iothread
)
2369 error_setg(errp
, "HBA does not support iothreads");
2373 if (dev
->type
== TYPE_DISK
) {
2374 if (!blkconf_geometry(&dev
->conf
, NULL
, 65535, 255, 255, errp
)) {
2379 read_only
= !blk_supports_write_perm(s
->qdev
.conf
.blk
);
2380 if (dev
->type
== TYPE_ROM
) {
2384 if (!blkconf_apply_backend_options(&dev
->conf
, read_only
,
2385 dev
->type
== TYPE_DISK
, errp
)) {
2389 if (s
->qdev
.conf
.discard_granularity
== -1) {
2390 s
->qdev
.conf
.discard_granularity
=
2391 MAX(s
->qdev
.conf
.logical_block_size
, DEFAULT_DISCARD_GRANULARITY
);
2395 s
->version
= g_strdup(qemu_hw_version());
2398 s
->vendor
= g_strdup("QEMU");
2400 if (!s
->device_id
) {
2402 s
->device_id
= g_strdup_printf("%.20s", s
->serial
);
2404 const char *str
= blk_name(s
->qdev
.conf
.blk
);
2406 s
->device_id
= g_strdup(str
);
2411 if (blk_is_sg(s
->qdev
.conf
.blk
)) {
2412 error_setg(errp
, "unwanted /dev/sg*");
2416 if ((s
->features
& (1 << SCSI_DISK_F_REMOVABLE
)) &&
2417 !(s
->features
& (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS
))) {
2418 blk_set_dev_ops(s
->qdev
.conf
.blk
, &scsi_disk_removable_block_ops
, s
);
2420 blk_set_dev_ops(s
->qdev
.conf
.blk
, &scsi_disk_block_ops
, s
);
2422 blk_set_guest_block_size(s
->qdev
.conf
.blk
, s
->qdev
.blocksize
);
2424 blk_iostatus_enable(s
->qdev
.conf
.blk
);
2426 add_boot_device_lchs(&dev
->qdev
, NULL
,
2432 static void scsi_unrealize(SCSIDevice
*dev
)
2434 del_boot_device_lchs(&dev
->qdev
, NULL
);
2437 static void scsi_hd_realize(SCSIDevice
*dev
, Error
**errp
)
2439 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, dev
);
2440 AioContext
*ctx
= NULL
;
2441 /* can happen for devices without drive. The error message for missing
2442 * backend will be issued in scsi_realize
2444 if (s
->qdev
.conf
.blk
) {
2445 ctx
= blk_get_aio_context(s
->qdev
.conf
.blk
);
2446 aio_context_acquire(ctx
);
2447 if (!blkconf_blocksizes(&s
->qdev
.conf
, errp
)) {
2451 s
->qdev
.blocksize
= s
->qdev
.conf
.logical_block_size
;
2452 s
->qdev
.type
= TYPE_DISK
;
2454 s
->product
= g_strdup("QEMU HARDDISK");
2456 scsi_realize(&s
->qdev
, errp
);
2459 aio_context_release(ctx
);
2463 static void scsi_cd_realize(SCSIDevice
*dev
, Error
**errp
)
2465 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, dev
);
2469 if (!dev
->conf
.blk
) {
2470 /* Anonymous BlockBackend for an empty drive. As we put it into
2471 * dev->conf, qdev takes care of detaching on unplug. */
2472 dev
->conf
.blk
= blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL
);
2473 ret
= blk_attach_dev(dev
->conf
.blk
, &dev
->qdev
);
2477 ctx
= blk_get_aio_context(dev
->conf
.blk
);
2478 aio_context_acquire(ctx
);
2479 s
->qdev
.blocksize
= 2048;
2480 s
->qdev
.type
= TYPE_ROM
;
2481 s
->features
|= 1 << SCSI_DISK_F_REMOVABLE
;
2483 s
->product
= g_strdup("QEMU CD-ROM");
2485 scsi_realize(&s
->qdev
, errp
);
2486 aio_context_release(ctx
);
2490 static const SCSIReqOps scsi_disk_emulate_reqops
= {
2491 .size
= sizeof(SCSIDiskReq
),
2492 .free_req
= scsi_free_request
,
2493 .send_command
= scsi_disk_emulate_command
,
2494 .read_data
= scsi_disk_emulate_read_data
,
2495 .write_data
= scsi_disk_emulate_write_data
,
2496 .get_buf
= scsi_get_buf
,
2499 static const SCSIReqOps scsi_disk_dma_reqops
= {
2500 .size
= sizeof(SCSIDiskReq
),
2501 .free_req
= scsi_free_request
,
2502 .send_command
= scsi_disk_dma_command
,
2503 .read_data
= scsi_read_data
,
2504 .write_data
= scsi_write_data
,
2505 .get_buf
= scsi_get_buf
,
2506 .load_request
= scsi_disk_load_request
,
2507 .save_request
= scsi_disk_save_request
,
2510 static const SCSIReqOps
*const scsi_disk_reqops_dispatch
[256] = {
2511 [TEST_UNIT_READY
] = &scsi_disk_emulate_reqops
,
2512 [INQUIRY
] = &scsi_disk_emulate_reqops
,
2513 [MODE_SENSE
] = &scsi_disk_emulate_reqops
,
2514 [MODE_SENSE_10
] = &scsi_disk_emulate_reqops
,
2515 [START_STOP
] = &scsi_disk_emulate_reqops
,
2516 [ALLOW_MEDIUM_REMOVAL
] = &scsi_disk_emulate_reqops
,
2517 [READ_CAPACITY_10
] = &scsi_disk_emulate_reqops
,
2518 [READ_TOC
] = &scsi_disk_emulate_reqops
,
2519 [READ_DVD_STRUCTURE
] = &scsi_disk_emulate_reqops
,
2520 [READ_DISC_INFORMATION
] = &scsi_disk_emulate_reqops
,
2521 [GET_CONFIGURATION
] = &scsi_disk_emulate_reqops
,
2522 [GET_EVENT_STATUS_NOTIFICATION
] = &scsi_disk_emulate_reqops
,
2523 [MECHANISM_STATUS
] = &scsi_disk_emulate_reqops
,
2524 [SERVICE_ACTION_IN_16
] = &scsi_disk_emulate_reqops
,
2525 [REQUEST_SENSE
] = &scsi_disk_emulate_reqops
,
2526 [SYNCHRONIZE_CACHE
] = &scsi_disk_emulate_reqops
,
2527 [SEEK_10
] = &scsi_disk_emulate_reqops
,
2528 [MODE_SELECT
] = &scsi_disk_emulate_reqops
,
2529 [MODE_SELECT_10
] = &scsi_disk_emulate_reqops
,
2530 [UNMAP
] = &scsi_disk_emulate_reqops
,
2531 [WRITE_SAME_10
] = &scsi_disk_emulate_reqops
,
2532 [WRITE_SAME_16
] = &scsi_disk_emulate_reqops
,
2533 [VERIFY_10
] = &scsi_disk_emulate_reqops
,
2534 [VERIFY_12
] = &scsi_disk_emulate_reqops
,
2535 [VERIFY_16
] = &scsi_disk_emulate_reqops
,
2537 [READ_6
] = &scsi_disk_dma_reqops
,
2538 [READ_10
] = &scsi_disk_dma_reqops
,
2539 [READ_12
] = &scsi_disk_dma_reqops
,
2540 [READ_16
] = &scsi_disk_dma_reqops
,
2541 [WRITE_6
] = &scsi_disk_dma_reqops
,
2542 [WRITE_10
] = &scsi_disk_dma_reqops
,
2543 [WRITE_12
] = &scsi_disk_dma_reqops
,
2544 [WRITE_16
] = &scsi_disk_dma_reqops
,
2545 [WRITE_VERIFY_10
] = &scsi_disk_dma_reqops
,
2546 [WRITE_VERIFY_12
] = &scsi_disk_dma_reqops
,
2547 [WRITE_VERIFY_16
] = &scsi_disk_dma_reqops
,
2550 static void scsi_disk_new_request_dump(uint32_t lun
, uint32_t tag
, uint8_t *buf
)
2553 int len
= scsi_cdb_length(buf
);
2554 char *line_buffer
, *p
;
2556 assert(len
> 0 && len
<= 16);
2557 line_buffer
= g_malloc(len
* 5 + 1);
2559 for (i
= 0, p
= line_buffer
; i
< len
; i
++) {
2560 p
+= sprintf(p
, " 0x%02x", buf
[i
]);
2562 trace_scsi_disk_new_request(lun
, tag
, line_buffer
);
2564 g_free(line_buffer
);
2567 static SCSIRequest
*scsi_new_request(SCSIDevice
*d
, uint32_t tag
, uint32_t lun
,
2568 uint8_t *buf
, void *hba_private
)
2570 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, d
);
2572 const SCSIReqOps
*ops
;
2576 ops
= scsi_disk_reqops_dispatch
[command
];
2578 ops
= &scsi_disk_emulate_reqops
;
2580 req
= scsi_req_alloc(ops
, &s
->qdev
, tag
, lun
, hba_private
);
2582 if (trace_event_get_state_backends(TRACE_SCSI_DISK_NEW_REQUEST
)) {
2583 scsi_disk_new_request_dump(lun
, tag
, buf
);
2590 static int get_device_type(SCSIDiskState
*s
)
2596 memset(cmd
, 0, sizeof(cmd
));
2597 memset(buf
, 0, sizeof(buf
));
2599 cmd
[4] = sizeof(buf
);
2601 ret
= scsi_SG_IO_FROM_DEV(s
->qdev
.conf
.blk
, cmd
, sizeof(cmd
),
2602 buf
, sizeof(buf
), s
->qdev
.io_timeout
);
2606 s
->qdev
.type
= buf
[0];
2607 if (buf
[1] & 0x80) {
2608 s
->features
|= 1 << SCSI_DISK_F_REMOVABLE
;
2613 static void scsi_block_realize(SCSIDevice
*dev
, Error
**errp
)
2615 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, dev
);
2620 if (!s
->qdev
.conf
.blk
) {
2621 error_setg(errp
, "drive property not set");
2625 if (s
->rotation_rate
) {
2626 error_report_once("rotation_rate is specified for scsi-block but is "
2627 "not implemented. This option is deprecated and will "
2628 "be removed in a future version");
2631 ctx
= blk_get_aio_context(s
->qdev
.conf
.blk
);
2632 aio_context_acquire(ctx
);
2634 /* check we are using a driver managing SG_IO (version 3 and after) */
2635 rc
= blk_ioctl(s
->qdev
.conf
.blk
, SG_GET_VERSION_NUM
, &sg_version
);
2637 error_setg_errno(errp
, -rc
, "cannot get SG_IO version number");
2639 error_append_hint(errp
, "Is this a SCSI device?\n");
2643 if (sg_version
< 30000) {
2644 error_setg(errp
, "scsi generic interface too old");
2648 /* get device type from INQUIRY data */
2649 rc
= get_device_type(s
);
2651 error_setg(errp
, "INQUIRY failed");
2655 /* Make a guess for the block size, we'll fix it when the guest sends.
2656 * READ CAPACITY. If they don't, they likely would assume these sizes
2657 * anyway. (TODO: check in /sys).
2659 if (s
->qdev
.type
== TYPE_ROM
|| s
->qdev
.type
== TYPE_WORM
) {
2660 s
->qdev
.blocksize
= 2048;
2662 s
->qdev
.blocksize
= 512;
2665 /* Makes the scsi-block device not removable by using HMP and QMP eject
2668 s
->features
|= (1 << SCSI_DISK_F_NO_REMOVABLE_DEVOPS
);
2670 scsi_realize(&s
->qdev
, errp
);
2671 scsi_generic_read_device_inquiry(&s
->qdev
);
2674 aio_context_release(ctx
);
2677 typedef struct SCSIBlockReq
{
2679 sg_io_hdr_t io_header
;
2681 /* Selected bytes of the original CDB, copied into our own CDB. */
2682 uint8_t cmd
, cdb1
, group_number
;
2684 /* CDB passed to SG_IO. */
2686 BlockCompletionFunc
*cb
;
2690 static void scsi_block_sgio_complete(void *opaque
, int ret
)
2692 SCSIBlockReq
*req
= (SCSIBlockReq
*)opaque
;
2693 SCSIDiskReq
*r
= &req
->req
;
2694 SCSIDevice
*s
= r
->req
.dev
;
2695 sg_io_hdr_t
*io_hdr
= &req
->io_header
;
2698 if (io_hdr
->host_status
!= SCSI_HOST_OK
) {
2699 scsi_req_complete_failed(&r
->req
, io_hdr
->host_status
);
2700 scsi_req_unref(&r
->req
);
2704 if (io_hdr
->driver_status
& SG_ERR_DRIVER_TIMEOUT
) {
2707 ret
= io_hdr
->status
;
2711 aio_context_acquire(blk_get_aio_context(s
->conf
.blk
));
2712 if (scsi_handle_rw_error(r
, ret
, true)) {
2713 aio_context_release(blk_get_aio_context(s
->conf
.blk
));
2714 scsi_req_unref(&r
->req
);
2717 aio_context_release(blk_get_aio_context(s
->conf
.blk
));
2724 req
->cb(req
->cb_opaque
, ret
);
2727 static BlockAIOCB
*scsi_block_do_sgio(SCSIBlockReq
*req
,
2728 int64_t offset
, QEMUIOVector
*iov
,
2730 BlockCompletionFunc
*cb
, void *opaque
)
2732 sg_io_hdr_t
*io_header
= &req
->io_header
;
2733 SCSIDiskReq
*r
= &req
->req
;
2734 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
2735 int nb_logical_blocks
;
2739 /* This is not supported yet. It can only happen if the guest does
2740 * reads and writes that are not aligned to one logical sectors
2741 * _and_ cover multiple MemoryRegions.
2743 assert(offset
% s
->qdev
.blocksize
== 0);
2744 assert(iov
->size
% s
->qdev
.blocksize
== 0);
2746 io_header
->interface_id
= 'S';
2748 /* The data transfer comes from the QEMUIOVector. */
2749 io_header
->dxfer_direction
= direction
;
2750 io_header
->dxfer_len
= iov
->size
;
2751 io_header
->dxferp
= (void *)iov
->iov
;
2752 io_header
->iovec_count
= iov
->niov
;
2753 assert(io_header
->iovec_count
== iov
->niov
); /* no overflow! */
2755 /* Build a new CDB with the LBA and length patched in, in case
2756 * DMA helpers split the transfer in multiple segments. Do not
2757 * build a CDB smaller than what the guest wanted, and only build
2758 * a larger one if strictly necessary.
2760 io_header
->cmdp
= req
->cdb
;
2761 lba
= offset
/ s
->qdev
.blocksize
;
2762 nb_logical_blocks
= io_header
->dxfer_len
/ s
->qdev
.blocksize
;
2764 if ((req
->cmd
>> 5) == 0 && lba
<= 0x1ffff) {
2766 stl_be_p(&req
->cdb
[0], lba
| (req
->cmd
<< 24));
2767 req
->cdb
[4] = nb_logical_blocks
;
2769 io_header
->cmd_len
= 6;
2770 } else if ((req
->cmd
>> 5) <= 1 && lba
<= 0xffffffffULL
) {
2772 req
->cdb
[0] = (req
->cmd
& 0x1f) | 0x20;
2773 req
->cdb
[1] = req
->cdb1
;
2774 stl_be_p(&req
->cdb
[2], lba
);
2775 req
->cdb
[6] = req
->group_number
;
2776 stw_be_p(&req
->cdb
[7], nb_logical_blocks
);
2778 io_header
->cmd_len
= 10;
2779 } else if ((req
->cmd
>> 5) != 4 && lba
<= 0xffffffffULL
) {
2781 req
->cdb
[0] = (req
->cmd
& 0x1f) | 0xA0;
2782 req
->cdb
[1] = req
->cdb1
;
2783 stl_be_p(&req
->cdb
[2], lba
);
2784 stl_be_p(&req
->cdb
[6], nb_logical_blocks
);
2785 req
->cdb
[10] = req
->group_number
;
2787 io_header
->cmd_len
= 12;
2790 req
->cdb
[0] = (req
->cmd
& 0x1f) | 0x80;
2791 req
->cdb
[1] = req
->cdb1
;
2792 stq_be_p(&req
->cdb
[2], lba
);
2793 stl_be_p(&req
->cdb
[10], nb_logical_blocks
);
2794 req
->cdb
[14] = req
->group_number
;
2796 io_header
->cmd_len
= 16;
2799 /* The rest is as in scsi-generic.c. */
2800 io_header
->mx_sb_len
= sizeof(r
->req
.sense
);
2801 io_header
->sbp
= r
->req
.sense
;
2802 io_header
->timeout
= s
->qdev
.io_timeout
* 1000;
2803 io_header
->usr_ptr
= r
;
2804 io_header
->flags
|= SG_FLAG_DIRECT_IO
;
2806 req
->cb_opaque
= opaque
;
2807 trace_scsi_disk_aio_sgio_command(r
->req
.tag
, req
->cdb
[0], lba
,
2808 nb_logical_blocks
, io_header
->timeout
);
2809 aiocb
= blk_aio_ioctl(s
->qdev
.conf
.blk
, SG_IO
, io_header
, scsi_block_sgio_complete
, req
);
2810 assert(aiocb
!= NULL
);
2814 static bool scsi_block_no_fua(SCSICommand
*cmd
)
2819 static BlockAIOCB
*scsi_block_dma_readv(int64_t offset
,
2821 BlockCompletionFunc
*cb
, void *cb_opaque
,
2824 SCSIBlockReq
*r
= opaque
;
2825 return scsi_block_do_sgio(r
, offset
, iov
,
2826 SG_DXFER_FROM_DEV
, cb
, cb_opaque
);
2829 static BlockAIOCB
*scsi_block_dma_writev(int64_t offset
,
2831 BlockCompletionFunc
*cb
, void *cb_opaque
,
2834 SCSIBlockReq
*r
= opaque
;
2835 return scsi_block_do_sgio(r
, offset
, iov
,
2836 SG_DXFER_TO_DEV
, cb
, cb_opaque
);
2839 static bool scsi_block_is_passthrough(SCSIDiskState
*s
, uint8_t *buf
)
2845 /* Check if BYTCHK == 0x01 (data-out buffer contains data
2846 * for the number of logical blocks specified in the length
2847 * field). For other modes, do not use scatter/gather operation.
2849 if ((buf
[1] & 6) == 2) {
2862 case WRITE_VERIFY_10
:
2863 case WRITE_VERIFY_12
:
2864 case WRITE_VERIFY_16
:
2865 /* MMC writing cannot be done via DMA helpers, because it sometimes
2866 * involves writing beyond the maximum LBA or to negative LBA (lead-in).
2867 * We might use scsi_block_dma_reqops as long as no writing commands are
2868 * seen, but performance usually isn't paramount on optical media. So,
2869 * just make scsi-block operate the same as scsi-generic for them.
2871 if (s
->qdev
.type
!= TYPE_ROM
) {
2884 static int32_t scsi_block_dma_command(SCSIRequest
*req
, uint8_t *buf
)
2886 SCSIBlockReq
*r
= (SCSIBlockReq
*)req
;
2887 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, req
->dev
);
2889 r
->cmd
= req
->cmd
.buf
[0];
2890 switch (r
->cmd
>> 5) {
2893 r
->cdb1
= r
->group_number
= 0;
2897 r
->cdb1
= req
->cmd
.buf
[1];
2898 r
->group_number
= req
->cmd
.buf
[6];
2902 r
->cdb1
= req
->cmd
.buf
[1];
2903 r
->group_number
= req
->cmd
.buf
[10];
2907 r
->cdb1
= req
->cmd
.buf
[1];
2908 r
->group_number
= req
->cmd
.buf
[14];
2914 /* Protection information is not supported. For SCSI versions 2 and
2915 * older (as determined by snooping the guest's INQUIRY commands),
2916 * there is no RD/WR/VRPROTECT, so skip this check in these versions.
2918 if (s
->qdev
.scsi_version
> 2 && (req
->cmd
.buf
[1] & 0xe0)) {
2919 scsi_check_condition(&r
->req
, SENSE_CODE(INVALID_FIELD
));
2923 return scsi_disk_dma_command(req
, buf
);
2926 static const SCSIReqOps scsi_block_dma_reqops
= {
2927 .size
= sizeof(SCSIBlockReq
),
2928 .free_req
= scsi_free_request
,
2929 .send_command
= scsi_block_dma_command
,
2930 .read_data
= scsi_read_data
,
2931 .write_data
= scsi_write_data
,
2932 .get_buf
= scsi_get_buf
,
2933 .load_request
= scsi_disk_load_request
,
2934 .save_request
= scsi_disk_save_request
,
2937 static SCSIRequest
*scsi_block_new_request(SCSIDevice
*d
, uint32_t tag
,
2938 uint32_t lun
, uint8_t *buf
,
2941 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, d
);
2943 if (scsi_block_is_passthrough(s
, buf
)) {
2944 return scsi_req_alloc(&scsi_generic_req_ops
, &s
->qdev
, tag
, lun
,
2947 return scsi_req_alloc(&scsi_block_dma_reqops
, &s
->qdev
, tag
, lun
,
2952 static int scsi_block_parse_cdb(SCSIDevice
*d
, SCSICommand
*cmd
,
2953 uint8_t *buf
, void *hba_private
)
2955 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, d
);
2957 if (scsi_block_is_passthrough(s
, buf
)) {
2958 return scsi_bus_parse_cdb(&s
->qdev
, cmd
, buf
, hba_private
);
2960 return scsi_req_parse_cdb(&s
->qdev
, cmd
, buf
);
2964 static void scsi_block_update_sense(SCSIRequest
*req
)
2966 SCSIDiskReq
*r
= DO_UPCAST(SCSIDiskReq
, req
, req
);
2967 SCSIBlockReq
*br
= DO_UPCAST(SCSIBlockReq
, req
, r
);
2968 r
->req
.sense_len
= MIN(br
->io_header
.sb_len_wr
, sizeof(r
->req
.sense
));
2973 BlockAIOCB
*scsi_dma_readv(int64_t offset
, QEMUIOVector
*iov
,
2974 BlockCompletionFunc
*cb
, void *cb_opaque
,
2977 SCSIDiskReq
*r
= opaque
;
2978 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
2979 return blk_aio_preadv(s
->qdev
.conf
.blk
, offset
, iov
, 0, cb
, cb_opaque
);
2983 BlockAIOCB
*scsi_dma_writev(int64_t offset
, QEMUIOVector
*iov
,
2984 BlockCompletionFunc
*cb
, void *cb_opaque
,
2987 SCSIDiskReq
*r
= opaque
;
2988 SCSIDiskState
*s
= DO_UPCAST(SCSIDiskState
, qdev
, r
->req
.dev
);
2989 return blk_aio_pwritev(s
->qdev
.conf
.blk
, offset
, iov
, 0, cb
, cb_opaque
);
2992 static void scsi_disk_base_class_initfn(ObjectClass
*klass
, void *data
)
2994 DeviceClass
*dc
= DEVICE_CLASS(klass
);
2995 SCSIDiskClass
*sdc
= SCSI_DISK_BASE_CLASS(klass
);
2997 dc
->fw_name
= "disk";
2998 dc
->reset
= scsi_disk_reset
;
2999 sdc
->dma_readv
= scsi_dma_readv
;
3000 sdc
->dma_writev
= scsi_dma_writev
;
3001 sdc
->need_fua_emulation
= scsi_is_cmd_fua
;
3004 static const TypeInfo scsi_disk_base_info
= {
3005 .name
= TYPE_SCSI_DISK_BASE
,
3006 .parent
= TYPE_SCSI_DEVICE
,
3007 .class_init
= scsi_disk_base_class_initfn
,
3008 .instance_size
= sizeof(SCSIDiskState
),
3009 .class_size
= sizeof(SCSIDiskClass
),
3013 #define DEFINE_SCSI_DISK_PROPERTIES() \
3014 DEFINE_PROP_DRIVE_IOTHREAD("drive", SCSIDiskState, qdev.conf.blk), \
3015 DEFINE_BLOCK_PROPERTIES_BASE(SCSIDiskState, qdev.conf), \
3016 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState, qdev.conf), \
3017 DEFINE_PROP_STRING("ver", SCSIDiskState, version), \
3018 DEFINE_PROP_STRING("serial", SCSIDiskState, serial), \
3019 DEFINE_PROP_STRING("vendor", SCSIDiskState, vendor), \
3020 DEFINE_PROP_STRING("product", SCSIDiskState, product), \
3021 DEFINE_PROP_STRING("device_id", SCSIDiskState, device_id)
3024 static Property scsi_hd_properties
[] = {
3025 DEFINE_SCSI_DISK_PROPERTIES(),
3026 DEFINE_PROP_BIT("removable", SCSIDiskState
, features
,
3027 SCSI_DISK_F_REMOVABLE
, false),
3028 DEFINE_PROP_BIT("dpofua", SCSIDiskState
, features
,
3029 SCSI_DISK_F_DPOFUA
, false),
3030 DEFINE_PROP_UINT64("wwn", SCSIDiskState
, qdev
.wwn
, 0),
3031 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState
, qdev
.port_wwn
, 0),
3032 DEFINE_PROP_UINT16("port_index", SCSIDiskState
, port_index
, 0),
3033 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState
, max_unmap_size
,
3034 DEFAULT_MAX_UNMAP_SIZE
),
3035 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState
, max_io_size
,
3036 DEFAULT_MAX_IO_SIZE
),
3037 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState
, rotation_rate
, 0),
3038 DEFINE_PROP_INT32("scsi_version", SCSIDiskState
, qdev
.default_scsi_version
,
3040 DEFINE_BLOCK_CHS_PROPERTIES(SCSIDiskState
, qdev
.conf
),
3041 DEFINE_PROP_END_OF_LIST(),
3044 static const VMStateDescription vmstate_scsi_disk_state
= {
3045 .name
= "scsi-disk",
3047 .minimum_version_id
= 1,
3048 .fields
= (VMStateField
[]) {
3049 VMSTATE_SCSI_DEVICE(qdev
, SCSIDiskState
),
3050 VMSTATE_BOOL(media_changed
, SCSIDiskState
),
3051 VMSTATE_BOOL(media_event
, SCSIDiskState
),
3052 VMSTATE_BOOL(eject_request
, SCSIDiskState
),
3053 VMSTATE_BOOL(tray_open
, SCSIDiskState
),
3054 VMSTATE_BOOL(tray_locked
, SCSIDiskState
),
3055 VMSTATE_END_OF_LIST()
3059 static void scsi_hd_class_initfn(ObjectClass
*klass
, void *data
)
3061 DeviceClass
*dc
= DEVICE_CLASS(klass
);
3062 SCSIDeviceClass
*sc
= SCSI_DEVICE_CLASS(klass
);
3064 sc
->realize
= scsi_hd_realize
;
3065 sc
->unrealize
= scsi_unrealize
;
3066 sc
->alloc_req
= scsi_new_request
;
3067 sc
->unit_attention_reported
= scsi_disk_unit_attention_reported
;
3068 dc
->desc
= "virtual SCSI disk";
3069 device_class_set_props(dc
, scsi_hd_properties
);
3070 dc
->vmsd
= &vmstate_scsi_disk_state
;
3073 static const TypeInfo scsi_hd_info
= {
3075 .parent
= TYPE_SCSI_DISK_BASE
,
3076 .class_init
= scsi_hd_class_initfn
,
3079 static Property scsi_cd_properties
[] = {
3080 DEFINE_SCSI_DISK_PROPERTIES(),
3081 DEFINE_PROP_UINT64("wwn", SCSIDiskState
, qdev
.wwn
, 0),
3082 DEFINE_PROP_UINT64("port_wwn", SCSIDiskState
, qdev
.port_wwn
, 0),
3083 DEFINE_PROP_UINT16("port_index", SCSIDiskState
, port_index
, 0),
3084 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState
, max_io_size
,
3085 DEFAULT_MAX_IO_SIZE
),
3086 DEFINE_PROP_INT32("scsi_version", SCSIDiskState
, qdev
.default_scsi_version
,
3088 DEFINE_PROP_END_OF_LIST(),
3091 static void scsi_cd_class_initfn(ObjectClass
*klass
, void *data
)
3093 DeviceClass
*dc
= DEVICE_CLASS(klass
);
3094 SCSIDeviceClass
*sc
= SCSI_DEVICE_CLASS(klass
);
3096 sc
->realize
= scsi_cd_realize
;
3097 sc
->alloc_req
= scsi_new_request
;
3098 sc
->unit_attention_reported
= scsi_disk_unit_attention_reported
;
3099 dc
->desc
= "virtual SCSI CD-ROM";
3100 device_class_set_props(dc
, scsi_cd_properties
);
3101 dc
->vmsd
= &vmstate_scsi_disk_state
;
3104 static const TypeInfo scsi_cd_info
= {
3106 .parent
= TYPE_SCSI_DISK_BASE
,
3107 .class_init
= scsi_cd_class_initfn
,
3111 static Property scsi_block_properties
[] = {
3112 DEFINE_BLOCK_ERROR_PROPERTIES(SCSIDiskState
, qdev
.conf
),
3113 DEFINE_PROP_DRIVE("drive", SCSIDiskState
, qdev
.conf
.blk
),
3114 DEFINE_PROP_BOOL("share-rw", SCSIDiskState
, qdev
.conf
.share_rw
, false),
3115 DEFINE_PROP_UINT16("rotation_rate", SCSIDiskState
, rotation_rate
, 0),
3116 DEFINE_PROP_UINT64("max_unmap_size", SCSIDiskState
, max_unmap_size
,
3117 DEFAULT_MAX_UNMAP_SIZE
),
3118 DEFINE_PROP_UINT64("max_io_size", SCSIDiskState
, max_io_size
,
3119 DEFAULT_MAX_IO_SIZE
),
3120 DEFINE_PROP_INT32("scsi_version", SCSIDiskState
, qdev
.default_scsi_version
,
3122 DEFINE_PROP_UINT32("io_timeout", SCSIDiskState
, qdev
.io_timeout
,
3123 DEFAULT_IO_TIMEOUT
),
3124 DEFINE_PROP_END_OF_LIST(),
3127 static void scsi_block_class_initfn(ObjectClass
*klass
, void *data
)
3129 DeviceClass
*dc
= DEVICE_CLASS(klass
);
3130 SCSIDeviceClass
*sc
= SCSI_DEVICE_CLASS(klass
);
3131 SCSIDiskClass
*sdc
= SCSI_DISK_BASE_CLASS(klass
);
3133 sc
->realize
= scsi_block_realize
;
3134 sc
->alloc_req
= scsi_block_new_request
;
3135 sc
->parse_cdb
= scsi_block_parse_cdb
;
3136 sdc
->dma_readv
= scsi_block_dma_readv
;
3137 sdc
->dma_writev
= scsi_block_dma_writev
;
3138 sdc
->update_sense
= scsi_block_update_sense
;
3139 sdc
->need_fua_emulation
= scsi_block_no_fua
;
3140 dc
->desc
= "SCSI block device passthrough";
3141 device_class_set_props(dc
, scsi_block_properties
);
3142 dc
->vmsd
= &vmstate_scsi_disk_state
;
3145 static const TypeInfo scsi_block_info
= {
3146 .name
= "scsi-block",
3147 .parent
= TYPE_SCSI_DISK_BASE
,
3148 .class_init
= scsi_block_class_initfn
,
3152 static void scsi_disk_register_types(void)
3154 type_register_static(&scsi_disk_base_info
);
3155 type_register_static(&scsi_hd_info
);
3156 type_register_static(&scsi_cd_info
);
3158 type_register_static(&scsi_block_info
);
3162 type_init(scsi_disk_register_types
)