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[Qemu-devel] [PATCH 20/32] scsi-disk: Fail medium writes with proper sen
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 20/32] scsi-disk: Fail medium writes with proper sense for readonly LUNs |
Date: |
Fri, 27 Jul 2012 17:02:47 +0200 |
From: Ronnie Sahlberg <address@hidden>
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 <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/scsi-bus.c | 5 +++++
hw/scsi-disk.c | 15 ++++++++++++---
hw/scsi.h | 2 ++
3 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/hw/scsi-bus.c b/hw/scsi-bus.c
index efbda6f..dd0cdd0 100644
--- a/hw/scsi-bus.c
+++ b/hw/scsi-bus.c
@@ -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
*
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 3c03159..fb0540a 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -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 " : "",
diff --git a/hw/scsi.h b/hw/scsi.h
index e2fb8a4..fc9dc50 100644
--- a/hw/scsi.h
+++ b/hw/scsi.h
@@ -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
--
1.7.10.4
- [Qemu-devel] [PATCH 32/32] virtio-scsi: enable MSI-X support, (continued)
- [Qemu-devel] [PATCH 32/32] virtio-scsi: enable MSI-X support, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 15/32] scsi-disk: fix changeable values for MODE_PAGE_R_W_ERROR, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 18/32] scsi-disk: rd/wr/vr-protect !=0 is an error, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 21/32] scsi-disk: removable hard disks support load/eject, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 28/32] virtio-scsi: Report missed events, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 27/32] virtio-scsi: Implement hotplug support for virtio-scsi, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 16/32] scsi-disk: parse MODE SELECT commands and parameters, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 19/32] scsi-disk: improve the lba-out-of-range tests for read/write/verify, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 26/32] scsi: report parameter changes to HBA drivers, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 22/32] scsi: add tracepoint for scsi_req_cancel, Paolo Bonzini, 2012/07/27
- [Qemu-devel] [PATCH 20/32] scsi-disk: Fail medium writes with proper sense for readonly LUNs,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 12/32] scsi-disk: separate read_data/write_data implementation for emulate_reqops, Paolo Bonzini, 2012/07/27