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[Qemu-devel] [PATCH 04/10] scsi-disk: implement READ DISC INFORMATION
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 04/10] scsi-disk: implement READ DISC INFORMATION |
Date: |
Tue, 12 Jun 2012 18:42:36 +0200 |
This command is not necessary for CD-ROM and DVD-ROM, but some versions of
udev trip on its absence.
Cc: Kevin Wolf <address@hidden>
Cc: Markus Armbruster <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/scsi-defs.h | 1 +
hw/scsi-disk.c | 40 ++++++++++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/hw/scsi-defs.h b/hw/scsi-defs.h
index 219c84d..3c9f1b5 100644
--- a/hw/scsi-defs.h
+++ b/hw/scsi-defs.h
@@ -82,6 +82,7 @@
#define GET_EVENT_STATUS_NOTIFICATION 0x4a
#define LOG_SELECT 0x4c
#define LOG_SENSE 0x4d
+#define READ_DISC_INFORMATION 0x51
#define RESERVE_TRACK 0x53
#define MODE_SELECT_10 0x55
#define RESERVE_10 0x56
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 8882f69..c4ad2ba 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -713,6 +713,39 @@ static inline bool media_is_cd(SCSIDiskState *s)
return nb_sectors <= CD_MAX_SECTORS;
}
+static int scsi_read_disc_information(SCSIDiskState *s, SCSIDiskReq *r,
+ uint8_t *outbuf)
+{
+ uint8_t type = r->req.cmd.buf[1] & 7;
+
+ if (s->qdev.type != TYPE_ROM) {
+ return -1;
+ }
+
+ /* Types 1/2 are only defined for Blu-Ray. */
+ if (type != 0) {
+ scsi_check_condition(r, SENSE_CODE(INVALID_FIELD));
+ return -1;
+ }
+
+ memset(outbuf, 0, 34);
+ outbuf[1] = 32;
+ outbuf[2] = 0xe; /* last session complete, disc finalized */
+ outbuf[3] = 1; /* first track on disc */
+ outbuf[4] = 1; /* # of sessions */
+ outbuf[5] = 1; /* first track of last session */
+ outbuf[6] = 1; /* last track of last session */
+ outbuf[7] = 0x20; /* unrestricted use */
+ outbuf[8] = 0x00; /* CD-ROM or DVD-ROM */
+ /* 9-10-11: most significant byte corresponding bytes 4-5-6 */
+ /* 12-23: not meaningful for CD-ROM or DVD-ROM */
+ /* 24-31: disc bar code */
+ /* 32: disc application code */
+ /* 33: number of OPC tables */
+
+ return 34;
+}
+
static int scsi_read_dvd_structure(SCSIDiskState *s, SCSIDiskReq *r,
uint8_t *outbuf)
{
@@ -1352,6 +1385,12 @@ static int scsi_disk_emulate_command(SCSIDiskReq *r)
goto illegal_request;
}
break;
+ case READ_DISC_INFORMATION:
+ buflen = scsi_read_disc_information(s, r, outbuf);
+ if (buflen < 0) {
+ goto illegal_request;
+ }
+ break;
case READ_DVD_STRUCTURE:
buflen = scsi_read_dvd_structure(s, r, outbuf);
if (buflen < 0) {
@@ -1479,6 +1518,7 @@ static int32_t scsi_send_command(SCSIRequest *req,
uint8_t *buf)
case ALLOW_MEDIUM_REMOVAL:
case READ_CAPACITY_10:
case READ_TOC:
+ case READ_DISC_INFORMATION:
case READ_DVD_STRUCTURE:
case GET_CONFIGURATION:
case GET_EVENT_STATUS_NOTIFICATION:
--
1.7.10.2
- [Qemu-devel] [PULL 00/10] SCSI updates for 2012-06-12, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 01/10] scsi: simplify handling of the VPD page length field, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 03/10] atapi: implement READ DISC INFORMATION, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 02/10] scsi: add a qdev property for the disk's WWN, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 04/10] scsi-disk: implement READ DISC INFORMATION,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 06/10] ISCSI: force use of sg for SMC and SSC devices, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 05/10] ISCSI: Add SCSI passthrough via scsi-generic to libiscsi, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 07/10] megasas: Add header file, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 08/10] megasas: LSI Megaraid SAS HBA emulation, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 10/10] virtio-scsi: do not crash on adding buffers to the event queue, Paolo Bonzini, 2012/06/12
- [Qemu-devel] [PATCH 09/10] megasas: Add trace events, Paolo Bonzini, 2012/06/12
- Re: [Qemu-devel] [PULL 00/10] SCSI updates for 2012-06-12, Anthony Liguori, 2012/06/20