haraldwolff/qemu-patch-raspberry4
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scsi-disk: Fail medium writes with proper sense for readonly LUNs

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Add sense code for DATA_PROTECT/WRITE_PROTECTED and return this error
for any WRITE*/WRITE_VERIFY* calls if the device is readonly=on,
i.e. write-protected

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ronnie Sahlberg 2012-07-16 08:53:28 +02:00 committed by Paolo Bonzini
parent ba6095cd6b
commit 6a8a685c4d
3 changed files with 19 additions and 3 deletions
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5
hw/scsi-bus.c
View file

@ -1182,6 +1182,11 @@ const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = {
.key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04
};
/* Data Protection, Write Protected */
const struct SCSISense sense_code_WRITE_PROTECTED = {
.key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00
};
/*
* scsi_build_sense
*

15
hw/scsi-disk.c
View file

@ -1702,6 +1702,10 @@ static int32_t scsi_disk_emulate_command(SCSIRequest *req, uint8_t *buf)
case WRITE_SAME_16:
nb_sectors = ldl_be_p(&req->cmd.buf[10]) & 0xffffffffULL;
write_same:
if (bdrv_is_read_only(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
return 0;
}
if (r->req.cmd.lba > s->qdev.max_lba) {
goto illegal_lba;
}
@ -1784,9 +1788,6 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
r->sector = r->req.cmd.lba * (s->qdev.blocksize / 512);
r->sector_count = len * (s->qdev.blocksize / 512);
break;
case VERIFY_10:
case VERIFY_12:
case VERIFY_16:
case WRITE_6:
case WRITE_10:
case WRITE_12:
@ -1794,6 +1795,14 @@ static int32_t scsi_disk_dma_command(SCSIRequest *req, uint8_t *buf)
case WRITE_VERIFY_10:
case WRITE_VERIFY_12:
case WRITE_VERIFY_16:
if (bdrv_is_read_only(s->qdev.conf.bs)) {
scsi_check_condition(r, SENSE_CODE(WRITE_PROTECTED));
return 0;
}
/* fallthrough */
case VERIFY_10:
case VERIFY_12:
case VERIFY_16:
len = r->req.cmd.xfer / s->qdev.blocksize;
DPRINTF("Write %s(sector %" PRId64 ", count %d)\n",
(command & 0xe) == 0xe ? "And Verify " : "",

2
hw/scsi.h
View file

@ -208,6 +208,8 @@ extern const struct SCSISense sense_code_MEDIUM_CHANGED;
extern const struct SCSISense sense_code_REPORTED_LUNS_CHANGED;
/* Unit attention, Device internal reset */
extern const struct SCSISense sense_code_DEVICE_INTERNAL_RESET;
/* Data Protection, Write Protected */
extern const struct SCSISense sense_code_WRITE_PROTECTED;
#define SENSE_CODE(x) sense_code_ ## x