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Block layer patches

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- scsi-generic: Fix I/O errors due to wrong block limits
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Merge tag 'for-upstream' of git://repo.or.cz/qemu/kevin into staging

Block layer patches

- scsi-generic: Fix I/O errors due to wrong block limits

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# gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
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# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]

* tag 'for-upstream' of git://repo.or.cz/qemu/kevin:
  scsi-generic: Fix emulated block limits VPD page

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-08-23 10:37:21 -07:00
commit a8cc5842b5
1 changed files with 14 additions and 7 deletions
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21
hw/scsi/scsi-generic.c
View File

@ -147,6 +147,18 @@ static int execute_command(BlockBackend *blk,
return 0;
}
static uint64_t calculate_max_transfer(SCSIDevice *s)
{
uint64_t max_transfer = blk_get_max_hw_transfer(s->conf.blk);
uint32_t max_iov = blk_get_max_hw_iov(s->conf.blk);
assert(max_transfer);
max_transfer = MIN_NON_ZERO(max_transfer,
max_iov * qemu_real_host_page_size());
return max_transfer / s->blocksize;
}
static int scsi_handle_inquiry_reply(SCSIGenericReq *r, SCSIDevice *s, int len)
{
uint8_t page, page_idx;
@ -179,12 +191,7 @@ static int scsi_handle_inquiry_reply(SCSIGenericReq *r, SCSIDevice *s, int len)
(r->req.cmd.buf[1] & 0x01)) {
page = r->req.cmd.buf[2];
if (page == 0xb0) {
uint64_t max_transfer = blk_get_max_hw_transfer(s->conf.blk);
uint32_t max_iov = blk_get_max_hw_iov(s->conf.blk);
assert(max_transfer);
max_transfer = MIN_NON_ZERO(max_transfer, max_iov * qemu_real_host_page_size())
/ s->blocksize;
uint64_t max_transfer = calculate_max_transfer(s);
stl_be_p(&r->buf[8], max_transfer);
/* Also take care of the opt xfer len. */
stl_be_p(&r->buf[12],
@ -230,7 +237,7 @@ static int scsi_generic_emulate_block_limits(SCSIGenericReq *r, SCSIDevice *s)
uint8_t buf[64];
SCSIBlockLimits bl = {
.max_io_sectors = blk_get_max_transfer(s->conf.blk) / s->blocksize
.max_io_sectors = calculate_max_transfer(s),
};
memset(r->buf, 0, r->buflen);