virtio-scsi: add support for the any_layout feature
Store the request and response headers by value, and let virtio_scsi_parse_req check that there is only one of datain and dataout. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
parent
a3de269ccc
commit
3eff1f46f0
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@ -27,21 +27,27 @@ typedef struct VirtIOSCSIReq {
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QEMUSGList qsgl;
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SCSIRequest *sreq;
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size_t resp_size;
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enum SCSIXferMode mode;
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QEMUIOVector resp_iov;
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union {
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char *buf;
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VirtIOSCSICmdResp *cmd;
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VirtIOSCSICtrlTMFResp *tmf;
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VirtIOSCSICtrlANResp *an;
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VirtIOSCSIEvent *event;
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VirtIOSCSICmdResp cmd;
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VirtIOSCSICtrlTMFResp tmf;
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VirtIOSCSICtrlANResp an;
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VirtIOSCSIEvent event;
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} resp;
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union {
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char *buf;
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VirtIOSCSICmdReq *cmd;
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VirtIOSCSICtrlTMFReq *tmf;
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VirtIOSCSICtrlANReq *an;
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struct {
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VirtIOSCSICmdReq cmd;
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uint8_t cdb[];
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} QEMU_PACKED;
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VirtIOSCSICtrlTMFReq tmf;
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VirtIOSCSICtrlANReq an;
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} req;
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} VirtIOSCSIReq;
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QEMU_BUILD_BUG_ON(offsetof(VirtIOSCSIReq, req.cdb) !=
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offsetof(VirtIOSCSIReq, req.cmd) + sizeof(VirtIOSCSICmdReq));
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static inline int virtio_scsi_get_lun(uint8_t *lun)
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{
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return ((lun[2] << 8) | lun[3]) & 0x3FFF;
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@ -61,17 +67,21 @@ static inline SCSIDevice *virtio_scsi_device_find(VirtIOSCSI *s, uint8_t *lun)
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static VirtIOSCSIReq *virtio_scsi_init_req(VirtIOSCSI *s, VirtQueue *vq)
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{
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VirtIOSCSIReq *req;
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req = g_malloc(sizeof(*req));
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VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(s);
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req = g_malloc0(sizeof(*req) + vs->cdb_size);
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req->vq = vq;
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req->dev = s;
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req->sreq = NULL;
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qemu_sglist_init(&req->qsgl, DEVICE(s), 8, &address_space_memory);
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qemu_iovec_init(&req->resp_iov, 1);
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return req;
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}
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static void virtio_scsi_free_req(VirtIOSCSIReq *req)
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{
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qemu_iovec_destroy(&req->resp_iov);
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qemu_sglist_destroy(&req->qsgl);
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g_free(req);
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}
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@ -81,7 +91,9 @@ static void virtio_scsi_complete_req(VirtIOSCSIReq *req)
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VirtIOSCSI *s = req->dev;
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VirtQueue *vq = req->vq;
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VirtIODevice *vdev = VIRTIO_DEVICE(s);
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virtqueue_push(vq, &req->elem, req->qsgl.size + req->elem.in_sg[0].iov_len);
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qemu_iovec_from_buf(&req->resp_iov, 0, &req->resp, req->resp_size);
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virtqueue_push(vq, &req->elem, req->qsgl.size + req->resp_iov.size);
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if (req->sreq) {
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req->sreq->hba_private = NULL;
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scsi_req_unref(req->sreq);
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@ -122,31 +134,35 @@ static size_t qemu_sgl_concat(VirtIOSCSIReq *req, struct iovec *iov,
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static int virtio_scsi_parse_req(VirtIOSCSIReq *req,
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unsigned req_size, unsigned resp_size)
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{
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if (req->elem.in_num == 0) {
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size_t in_size, out_size;
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if (iov_to_buf(req->elem.out_sg, req->elem.out_num, 0,
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&req->req, req_size) < req_size) {
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return -EINVAL;
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}
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if (req->elem.out_sg[0].iov_len < req_size) {
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if (qemu_iovec_concat_iov(&req->resp_iov,
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req->elem.in_sg, req->elem.in_num, 0,
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resp_size) < resp_size) {
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return -EINVAL;
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}
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if (req->elem.out_num) {
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req->req.buf = req->elem.out_sg[0].iov_base;
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}
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if (req->elem.in_sg[0].iov_len < resp_size) {
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return -EINVAL;
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}
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req->resp.buf = req->elem.in_sg[0].iov_base;
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req->resp_size = resp_size;
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if (req->elem.out_num > 1) {
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qemu_sgl_concat(req, &req->elem.out_sg[1],
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&req->elem.out_addr[1],
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req->elem.out_num - 1, 0);
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} else {
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qemu_sgl_concat(req, &req->elem.in_sg[1],
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&req->elem.in_addr[1],
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req->elem.in_num - 1, 0);
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out_size = qemu_sgl_concat(req, req->elem.out_sg,
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&req->elem.out_addr[0], req->elem.out_num,
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req_size);
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in_size = qemu_sgl_concat(req, req->elem.in_sg,
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&req->elem.in_addr[0], req->elem.in_num,
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resp_size);
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if (out_size && in_size) {
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return -ENOTSUP;
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}
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if (out_size) {
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req->mode = SCSI_XFER_TO_DEV;
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} else if (in_size) {
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req->mode = SCSI_XFER_FROM_DEV;
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}
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return 0;
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@ -204,37 +220,34 @@ static void *virtio_scsi_load_request(QEMUFile *f, SCSIRequest *sreq)
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scsi_req_ref(sreq);
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req->sreq = sreq;
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if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
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int req_mode =
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(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
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assert(req->sreq->cmd.mode == req_mode);
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assert(req->sreq->cmd.mode == req->mode);
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}
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return req;
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}
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static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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{
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SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf->lun);
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SCSIDevice *d = virtio_scsi_device_find(s, req->req.tmf.lun);
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SCSIRequest *r, *next;
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BusChild *kid;
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int target;
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/* Here VIRTIO_SCSI_S_OK means "FUNCTION COMPLETE". */
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req->resp.tmf->response = VIRTIO_SCSI_S_OK;
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req->resp.tmf.response = VIRTIO_SCSI_S_OK;
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tswap32s(&req->req.tmf->subtype);
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switch (req->req.tmf->subtype) {
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tswap32s(&req->req.tmf.subtype);
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switch (req->req.tmf.subtype) {
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case VIRTIO_SCSI_T_TMF_ABORT_TASK:
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case VIRTIO_SCSI_T_TMF_QUERY_TASK:
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if (!d) {
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goto fail;
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}
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
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goto incorrect_lun;
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}
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QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) {
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VirtIOSCSIReq *cmd_req = r->hba_private;
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if (cmd_req && cmd_req->req.cmd->tag == req->req.tmf->tag) {
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if (cmd_req && cmd_req->req.cmd.tag == req->req.tmf.tag) {
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break;
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}
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}
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@ -244,11 +257,11 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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* check for it in the loop above.
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*/
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assert(r->hba_private);
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if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) {
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if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK) {
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/* "If the specified command is present in the task set, then
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* return a service response set to FUNCTION SUCCEEDED".
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*/
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
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req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
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} else {
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scsi_req_cancel(r);
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}
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@ -259,7 +272,7 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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if (!d) {
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goto fail;
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}
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
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goto incorrect_lun;
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}
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s->resetting++;
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@ -273,16 +286,16 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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if (!d) {
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goto fail;
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}
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if (d->lun != virtio_scsi_get_lun(req->req.tmf->lun)) {
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if (d->lun != virtio_scsi_get_lun(req->req.tmf.lun)) {
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goto incorrect_lun;
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}
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QTAILQ_FOREACH_SAFE(r, &d->requests, next, next) {
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if (r->hba_private) {
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if (req->req.tmf->subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) {
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if (req->req.tmf.subtype == VIRTIO_SCSI_T_TMF_QUERY_TASK_SET) {
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/* "If there is any command present in the task set, then
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* return a service response set to FUNCTION SUCCEEDED".
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*/
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
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req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_SUCCEEDED;
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break;
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} else {
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scsi_req_cancel(r);
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@ -292,7 +305,7 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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break;
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case VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET:
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target = req->req.tmf->lun[1];
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target = req->req.tmf.lun[1];
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s->resetting++;
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QTAILQ_FOREACH(kid, &s->bus.qbus.children, sibling) {
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d = DO_UPCAST(SCSIDevice, qdev, kid->child);
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@ -305,18 +318,18 @@ static void virtio_scsi_do_tmf(VirtIOSCSI *s, VirtIOSCSIReq *req)
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case VIRTIO_SCSI_T_TMF_CLEAR_ACA:
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default:
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req->resp.tmf->response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
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req->resp.tmf.response = VIRTIO_SCSI_S_FUNCTION_REJECTED;
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break;
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}
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return;
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incorrect_lun:
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req->resp.tmf->response = VIRTIO_SCSI_S_INCORRECT_LUN;
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req->resp.tmf.response = VIRTIO_SCSI_S_INCORRECT_LUN;
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return;
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fail:
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req->resp.tmf->response = VIRTIO_SCSI_S_BAD_TARGET;
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req->resp.tmf.response = VIRTIO_SCSI_S_BAD_TARGET;
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}
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static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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@ -333,8 +346,8 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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continue;
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}
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tswap32s(&req->req.tmf->type);
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if (req->req.tmf->type == VIRTIO_SCSI_T_TMF) {
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tswap32s(&req->req.tmf.type);
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if (req->req.tmf.type == VIRTIO_SCSI_T_TMF) {
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if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlTMFReq),
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sizeof(VirtIOSCSICtrlTMFResp)) < 0) {
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virtio_scsi_bad_req();
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@ -342,14 +355,14 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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virtio_scsi_do_tmf(s, req);
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}
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} else if (req->req.tmf->type == VIRTIO_SCSI_T_AN_QUERY ||
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req->req.tmf->type == VIRTIO_SCSI_T_AN_SUBSCRIBE) {
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} else if (req->req.tmf.type == VIRTIO_SCSI_T_AN_QUERY ||
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req->req.tmf.type == VIRTIO_SCSI_T_AN_SUBSCRIBE) {
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if (virtio_scsi_parse_req(req, sizeof(VirtIOSCSICtrlANReq),
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sizeof(VirtIOSCSICtrlANResp)) < 0) {
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virtio_scsi_bad_req();
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} else {
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req->resp.an->event_actual = 0;
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req->resp.an->response = VIRTIO_SCSI_S_OK;
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req->resp.an.event_actual = 0;
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req->resp.an.response = VIRTIO_SCSI_S_OK;
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}
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}
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virtio_scsi_complete_req(req);
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@ -358,6 +371,10 @@ static void virtio_scsi_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
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static void virtio_scsi_complete_cmd_req(VirtIOSCSIReq *req)
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{
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/* Sense data is not in req->resp and is copied separately
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* in virtio_scsi_command_complete.
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*/
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req->resp_size = sizeof(VirtIOSCSICmdResp);
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virtio_scsi_complete_req(req);
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}
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@ -372,16 +389,17 @@ static void virtio_scsi_command_complete(SCSIRequest *r, uint32_t status,
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return;
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}
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req->resp.cmd->response = VIRTIO_SCSI_S_OK;
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req->resp.cmd->status = status;
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if (req->resp.cmd->status == GOOD) {
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req->resp.cmd->resid = tswap32(resid);
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req->resp.cmd.response = VIRTIO_SCSI_S_OK;
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req->resp.cmd.status = status;
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if (req->resp.cmd.status == GOOD) {
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req->resp.cmd.resid = tswap32(resid);
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} else {
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req->resp.cmd->resid = 0;
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req->resp.cmd.resid = 0;
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sense_len = scsi_req_get_sense(r, sense, sizeof(sense));
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sense_len = MIN(sense_len, req->resp_size - sizeof(req->resp.cmd));
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memcpy(req->resp.cmd->sense, sense, sense_len);
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req->resp.cmd->sense_len = tswap32(sense_len);
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sense_len = MIN(sense_len, req->resp_iov.size - sizeof(req->resp.cmd));
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qemu_iovec_from_buf(&req->resp_iov, sizeof(req->resp.cmd),
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&req->resp, sense_len);
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req->resp.cmd.sense_len = tswap32(sense_len);
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}
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virtio_scsi_complete_cmd_req(req);
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}
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@ -401,16 +419,16 @@ static void virtio_scsi_request_cancelled(SCSIRequest *r)
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return;
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}
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if (req->dev->resetting) {
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req->resp.cmd->response = VIRTIO_SCSI_S_RESET;
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req->resp.cmd.response = VIRTIO_SCSI_S_RESET;
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} else {
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req->resp.cmd->response = VIRTIO_SCSI_S_ABORTED;
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req->resp.cmd.response = VIRTIO_SCSI_S_ABORTED;
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}
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virtio_scsi_complete_cmd_req(req);
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}
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static void virtio_scsi_fail_cmd_req(VirtIOSCSIReq *req)
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{
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req->resp.cmd->response = VIRTIO_SCSI_S_FAILURE;
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req->resp.cmd.response = VIRTIO_SCSI_S_FAILURE;
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virtio_scsi_complete_cmd_req(req);
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}
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@ -426,37 +444,34 @@ static void virtio_scsi_handle_cmd(VirtIODevice *vdev, VirtQueue *vq)
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while ((req = virtio_scsi_pop_req(s, vq))) {
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SCSIDevice *d;
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int rc;
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if (req->elem.out_num > 1 && req->elem.in_num > 1) {
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virtio_scsi_fail_cmd_req(req);
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continue;
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}
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rc = virtio_scsi_parse_req(req, sizeof(VirtIOSCSICmdReq) + vs->cdb_size,
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sizeof(VirtIOSCSICmdResp) + vs->sense_size);
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if (rc < 0) {
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virtio_scsi_bad_req();
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if (rc == -ENOTSUP) {
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virtio_scsi_fail_cmd_req(req);
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} else {
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virtio_scsi_bad_req();
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}
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continue;
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}
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d = virtio_scsi_device_find(s, req->req.cmd->lun);
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d = virtio_scsi_device_find(s, req->req.cmd.lun);
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if (!d) {
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req->resp.cmd->response = VIRTIO_SCSI_S_BAD_TARGET;
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req->resp.cmd.response = VIRTIO_SCSI_S_BAD_TARGET;
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virtio_scsi_complete_cmd_req(req);
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continue;
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}
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req->sreq = scsi_req_new(d, req->req.cmd->tag,
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virtio_scsi_get_lun(req->req.cmd->lun),
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req->req.cmd->cdb, req);
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req->sreq = scsi_req_new(d, req->req.cmd.tag,
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virtio_scsi_get_lun(req->req.cmd.lun),
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req->req.cdb, req);
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if (req->sreq->cmd.mode != SCSI_XFER_NONE) {
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int req_mode =
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(req->elem.in_num > 1 ? SCSI_XFER_FROM_DEV : SCSI_XFER_TO_DEV);
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if (req->sreq->cmd.mode != req_mode ||
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req->sreq->cmd.xfer > req->qsgl.size) {
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req->resp.cmd->response = VIRTIO_SCSI_S_OVERRUN;
|
||||
virtio_scsi_complete_cmd_req(req);
|
||||
continue;
|
||||
}
|
||||
if (req->sreq->cmd.mode != SCSI_XFER_NONE
|
||||
&& (req->sreq->cmd.mode != req->mode ||
|
||||
req->sreq->cmd.xfer > req->qsgl.size)) {
|
||||
req->resp.cmd.response = VIRTIO_SCSI_S_OVERRUN;
|
||||
virtio_scsi_complete_cmd_req(req);
|
||||
continue;
|
||||
}
|
||||
|
||||
n = scsi_req_enqueue(req->sreq);
|
||||
|
|
@ -560,7 +575,7 @@ static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
|
|||
return;
|
||||
}
|
||||
|
||||
if (req->elem.out_num || req->elem.in_num != 1) {
|
||||
if (req->elem.out_num) {
|
||||
virtio_scsi_bad_req();
|
||||
}
|
||||
|
||||
|
|
@ -569,12 +584,12 @@ static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
|
|||
s->events_dropped = false;
|
||||
}
|
||||
|
||||
in_size = req->elem.in_sg[0].iov_len;
|
||||
in_size = iov_size(req->elem.in_sg, req->elem.in_num);
|
||||
if (in_size < sizeof(VirtIOSCSIEvent)) {
|
||||
virtio_scsi_bad_req();
|
||||
}
|
||||
|
||||
evt = req->resp.event;
|
||||
evt = &req->resp.event;
|
||||
memset(evt, 0, sizeof(VirtIOSCSIEvent));
|
||||
evt->event = event;
|
||||
evt->reason = reason;
|
||||
|
|
|
|||
|
|
@ -268,6 +268,10 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
|
|||
|
||||
#define PC_COMPAT_2_0 \
|
||||
{\
|
||||
.driver = "virtio-scsi-pci",\
|
||||
.property = "any_layout",\
|
||||
.value = "off",\
|
||||
},{\
|
||||
.driver = "apic",\
|
||||
.property = "version",\
|
||||
.value = stringify(0x11),\
|
||||
|
|
|
|||
|
|
@ -84,14 +84,13 @@
|
|||
#define VIRTIO_SCSI_EVT_RESET_RESCAN 1
|
||||
#define VIRTIO_SCSI_EVT_RESET_REMOVED 2
|
||||
|
||||
/* SCSI command request, followed by data-out */
|
||||
/* SCSI command request, followed by CDB and data-out */
|
||||
typedef struct {
|
||||
uint8_t lun[8]; /* Logical Unit Number */
|
||||
uint64_t tag; /* Command identifier */
|
||||
uint8_t task_attr; /* Task attribute */
|
||||
uint8_t prio;
|
||||
uint8_t crn;
|
||||
uint8_t cdb[];
|
||||
} QEMU_PACKED VirtIOSCSICmdReq;
|
||||
|
||||
/* Response, followed by sense data and data-in */
|
||||
|
|
@ -101,7 +100,6 @@ typedef struct {
|
|||
uint16_t status_qualifier; /* Status qualifier */
|
||||
uint8_t status; /* Command completion status */
|
||||
uint8_t response; /* Response values */
|
||||
uint8_t sense[];
|
||||
} QEMU_PACKED VirtIOSCSICmdResp;
|
||||
|
||||
/* Task Management Request */
|
||||
|
|
|
|||
Loading…
Reference in New Issue