|
From: | Paolo Bonzini |
Subject: | Re: [PATCH v2] scsi-disk: support setting CD-ROM block size via device options |
Date: | Sat, 20 Aug 2022 09:42:25 +0200 |
SunOS expects CD-ROM devices to have a block size of 512, and will
fail to mount or install using QEMU's default block size of 2048.
When initializing the SCSI device, allow the `physical_block_size'
block device option to override the default block size.
Signed-off-by: John Millikin <john@john-millikin.com>
---
hw/scsi/scsi-disk.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
This is the same diff as sent to qemu-devel@ about a week ago. That
first email seems to have been eaten by a grue, but replying to it
worked, so maybe the grue is gone now.
See https://gitlab.com/qemu-project/qemu/-/issues/1127 for some
related discussion about SunOS CD-ROM compatibility.
diff --git a/hw/scsi/scsi-disk.c b/hw/scsi/scsi-disk.c
index f5cdb9ad4b..acdf8dc05c 100644
--- a/hw/scsi/scsi-disk.c
+++ b/hw/scsi/scsi-disk.c
@@ -2533,6 +2533,7 @@ static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
SCSIDiskState *s = DO_UPCAST(SCSIDiskState, qdev, dev);
AioContext *ctx;
int ret;
+ uint32_t blocksize = 2048;
if (!dev->conf.blk) {
/* Anonymous BlockBackend for an empty drive. As we put it into
@@ -2542,9 +2543,13 @@ static void scsi_cd_realize(SCSIDevice *dev, Error **errp)
assert(ret == 0);
}
+ if (dev->conf.physical_block_size != 0) {
+ blocksize = dev->conf.physical_block_size;
+ }
+
ctx = blk_get_aio_context(dev->conf.blk);
aio_context_acquire(ctx);
- s->qdev.blocksize = 2048;
+ s->qdev.blocksize = blocksize;
s->qdev.type = TYPE_ROM;
s->features |= 1 << SCSI_DISK_F_REMOVABLE;
if (!s->product) {
--
2.25.1
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