mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-24 12:09:58 +00:00
3d4a8bf0ee
Emulation of the block limits VPD page called back into scsi-disk.c, which however expected the request to be for a SCSIDiskState and accessed a scsi-generic device outside the bounds of its struct (namely to retrieve s->max_unmap_size and s->max_io_size). To avoid this, move the emulation code to a separate function that takes a new SCSIBlockLimits struct and marshals it into the VPD response format. Reported-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#include "qemu/osdep.h"
|
|
#include "qemu/units.h"
|
|
#include "qemu/bswap.h"
|
|
#include "hw/scsi/emulation.h"
|
|
|
|
int scsi_emulate_block_limits(uint8_t *outbuf, const SCSIBlockLimits *bl)
|
|
{
|
|
/* required VPD size with unmap support */
|
|
memset(outbuf, 0, 0x3c);
|
|
|
|
outbuf[0] = bl->wsnz; /* wsnz */
|
|
|
|
if (bl->max_io_sectors) {
|
|
/* optimal transfer length granularity. This field and the optimal
|
|
* transfer length can't be greater than maximum transfer length.
|
|
*/
|
|
stw_be_p(outbuf + 2, MIN(bl->min_io_size, bl->max_io_sectors));
|
|
|
|
/* maximum transfer length */
|
|
stl_be_p(outbuf + 4, bl->max_io_sectors);
|
|
|
|
/* optimal transfer length */
|
|
stl_be_p(outbuf + 8, MIN(bl->opt_io_size, bl->max_io_sectors));
|
|
} else {
|
|
stw_be_p(outbuf + 2, bl->min_io_size);
|
|
stl_be_p(outbuf + 8, bl->opt_io_size);
|
|
}
|
|
|
|
/* max unmap LBA count */
|
|
stl_be_p(outbuf + 16, bl->max_unmap_sectors);
|
|
|
|
/* max unmap descriptors */
|
|
stl_be_p(outbuf + 20, bl->max_unmap_descr);
|
|
|
|
/* optimal unmap granularity; alignment is zero */
|
|
stl_be_p(outbuf + 24, bl->unmap_sectors);
|
|
|
|
/* max write same size, make it the same as maximum transfer length */
|
|
stl_be_p(outbuf + 36, bl->max_io_sectors);
|
|
|
|
return 0x3c;
|
|
}
|