mirror of https://github.com/proxmox/mirror_qemu
scsi-generic: Merge block max xfer len in INQUIRY response
The rationale is similar to the above mode sense response interception: this is practically the only channel to communicate restraints from elsewhere such as host and block driver. The scsi bus we attach onto can have a larger max xfer len than what is accepted by the host file system (guarding between the host scsi LUN and QEMU), in which case the SG_IO we generate would get -EINVAL. Signed-off-by: Fam Zheng <famz@redhat.com> Message-Id: <1464243305-10661-3-git-send-email-famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>master
parent
8fdc7839e4
commit
063143d5b1
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@ -222,6 +222,18 @@ static void scsi_read_complete(void * opaque, int ret)
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r->buf[3] |= 0x80;
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r->buf[3] |= 0x80;
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}
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}
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}
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}
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if (s->type == TYPE_DISK &&
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r->req.cmd.buf[0] == INQUIRY &&
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r->req.cmd.buf[2] == 0xb0) {
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uint32_t max_xfer_len = blk_get_max_transfer_length(s->conf.blk);
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if (max_xfer_len) {
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stl_be_p(&r->buf[8], max_xfer_len);
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/* Also take care of the opt xfer len. */
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if (ldl_be_p(&r->buf[12]) > max_xfer_len) {
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stl_be_p(&r->buf[12], max_xfer_len);
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}
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}
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}
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scsi_req_data(&r->req, len);
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scsi_req_data(&r->req, len);
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scsi_req_unref(&r->req);
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scsi_req_unref(&r->req);
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}
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}
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