diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2012-05-25 12:59:55 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2012-07-02 10:18:41 +0200 |
| commit | 1a4f0c3a0621e6644f3cfc0121478641337ac9ca (patch) | |
| tree | 8425aa81e08c3f29748857213b258c77126b00b0 | |
| parent | 55042b955b56e633120027ad0cdc6c059ab9954d (diff) | |
scsi-disk: implement READ DISC INFORMATION
This command is not necessary for CD-ROM and DVD-ROM, but some versions of
udev trip on its absence.
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | hw/scsi-defs.h | 1 | ||||
| -rw-r--r-- | hw/scsi-disk.c | 40 |
2 files changed, 41 insertions, 0 deletions
diff --git a/hw/scsi-defs.h b/hw/scsi-defs.h index 219c84dfb1..3c9f1b5113 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 e87e57c6f4..34336b1b58 100644 --- a/hw/scsi-disk.c +++ b/hw/scsi-disk.c @@ -724,6 +724,39 @@ 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) { @@ -1363,6 +1396,12 @@ 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) { @@ -1490,6 +1529,7 @@ 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: |