hw/block/nvme: add ns/cmd references in NvmeRequest

Instead of passing around the NvmeNamespace and the NvmeCmd, add them as
members in the NvmeRequest structure.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>

2 files changed, 104 insertions, 85 deletions

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 20cb174963..7d5c69c04f 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -226,6 +226,12 @@ static void nvme_irq_deassert(NvmeCtrl *n, NvmeCQueue *cq)
     }
 }
 
+static void nvme_req_clear(NvmeRequest *req)
+{
+    req->ns = NULL;
+    memset(&req->cqe, 0x0, sizeof(req->cqe));
+}
+
 static uint16_t nvme_map_addr_cmb(NvmeCtrl *n, QEMUIOVector *iov, hwaddr addr,
                                   size_t len)
 {
@@ -443,9 +449,9 @@ static uint16_t nvme_dma_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len,
     return status;
 }
 
-static uint16_t nvme_map_dptr(NvmeCtrl *n, NvmeCmd *cmd, size_t len,
-                         NvmeRequest *req)
+static uint16_t nvme_map_dptr(NvmeCtrl *n, size_t len, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -621,8 +627,7 @@ static void nvme_rw_cb(void *opaque, int ret)
     nvme_enqueue_req_completion(cq, req);
 }
 
-static uint16_t nvme_flush(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
-    NvmeRequest *req)
+static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *req)
 {
     block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
          BLOCK_ACCT_FLUSH);
@@ -631,10 +636,10 @@ static uint16_t nvme_flush(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
-    NvmeRequest *req)
+static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
+    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
+    NvmeNamespace *ns = req->ns;
     const uint8_t lba_index = NVME_ID_NS_FLBAS_INDEX(ns->id_ns.flbas);
     const uint8_t data_shift = ns->id_ns.lbaf[lba_index].ds;
     uint64_t slba = le64_to_cpu(rw->slba);
@@ -658,10 +663,10 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
-    NvmeRequest *req)
+static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
+    NvmeRwCmd *rw = (NvmeRwCmd *)&req->cmd;
+    NvmeNamespace *ns = req->ns;
     uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
     uint64_t slba = le64_to_cpu(rw->slba);
 
@@ -689,7 +694,7 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
         return status;
     }
 
-    if (nvme_map_dptr(n, cmd, data_size, req)) {
+    if (nvme_map_dptr(n, data_size, req)) {
         block_acct_invalid(blk_get_stats(n->conf.blk), acct);
         return NVME_INVALID_FIELD | NVME_DNR;
     }
@@ -715,29 +720,29 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeNamespace *ns;
-    uint32_t nsid = le32_to_cpu(cmd->nsid);
+    uint32_t nsid = le32_to_cpu(req->cmd.nsid);
 
-    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req), cmd->opcode);
+    trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req),
+                          req->cmd.opcode);
 
     if (unlikely(nsid == 0 || nsid > n->num_namespaces)) {
         trace_pci_nvme_err_invalid_ns(nsid, n->num_namespaces);
         return NVME_INVALID_NSID | NVME_DNR;
     }
 
-    ns = &n->namespaces[nsid - 1];
-    switch (cmd->opcode) {
+    req->ns = &n->namespaces[nsid - 1];
+    switch (req->cmd.opcode) {
     case NVME_CMD_FLUSH:
-        return nvme_flush(n, ns, cmd, req);
+        return nvme_flush(n, req);
     case NVME_CMD_WRITE_ZEROES:
-        return nvme_write_zeroes(n, ns, cmd, req);
+        return nvme_write_zeroes(n, req);
     case NVME_CMD_WRITE:
     case NVME_CMD_READ:
-        return nvme_rw(n, ns, cmd, req);
+        return nvme_rw(n, req);
     default:
-        trace_pci_nvme_err_invalid_opc(cmd->opcode);
+        trace_pci_nvme_err_invalid_opc(req->cmd.opcode);
         return NVME_INVALID_OPCODE | NVME_DNR;
     }
 }
@@ -753,10 +758,10 @@ static void nvme_free_sq(NvmeSQueue *sq, NvmeCtrl *n)
     }
 }
 
-static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
-    NvmeRequest *req, *next;
+    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
+    NvmeRequest *r, *next;
     NvmeSQueue *sq;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
@@ -770,19 +775,19 @@ static uint16_t nvme_del_sq(NvmeCtrl *n, NvmeCmd *cmd)
 
     sq = n->sq[qid];
     while (!QTAILQ_EMPTY(&sq->out_req_list)) {
-        req = QTAILQ_FIRST(&sq->out_req_list);
-        assert(req->aiocb);
-        blk_aio_cancel(req->aiocb);
+        r = QTAILQ_FIRST(&sq->out_req_list);
+        assert(r->aiocb);
+        blk_aio_cancel(r->aiocb);
     }
     if (!nvme_check_cqid(n, sq->cqid)) {
         cq = n->cq[sq->cqid];
         QTAILQ_REMOVE(&cq->sq_list, sq, entry);
 
         nvme_post_cqes(cq);
-        QTAILQ_FOREACH_SAFE(req, &cq->req_list, entry, next) {
-            if (req->sq == sq) {
-                QTAILQ_REMOVE(&cq->req_list, req, entry);
-                QTAILQ_INSERT_TAIL(&sq->req_list, req, entry);
+        QTAILQ_FOREACH_SAFE(r, &cq->req_list, entry, next) {
+            if (r->sq == sq) {
+                QTAILQ_REMOVE(&cq->req_list, r, entry);
+                QTAILQ_INSERT_TAIL(&sq->req_list, r, entry);
             }
         }
     }
@@ -819,10 +824,10 @@ static void nvme_init_sq(NvmeSQueue *sq, NvmeCtrl *n, uint64_t dma_addr,
     n->sq[sqid] = sq;
 }
 
-static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeSQueue *sq;
-    NvmeCreateSq *c = (NvmeCreateSq *)cmd;
+    NvmeCreateSq *c = (NvmeCreateSq *)&req->cmd;
 
     uint16_t cqid = le16_to_cpu(c->cqid);
     uint16_t sqid = le16_to_cpu(c->sqid);
@@ -857,10 +862,10 @@ static uint16_t nvme_create_sq(NvmeCtrl *n, NvmeCmd *cmd)
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
-                                uint32_t buf_len, uint64_t off,
-                                NvmeRequest *req)
+static uint16_t nvme_smart_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
+                                uint64_t off, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -916,10 +921,11 @@ static uint16_t nvme_smart_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
                         DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
-                                 uint64_t off, NvmeRequest *req)
+static uint16_t nvme_fw_log_info(NvmeCtrl *n, uint32_t buf_len, uint64_t off,
+                                 NvmeRequest *req)
 {
     uint32_t trans_len;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     NvmeFwSlotInfoLog fw_log = {
@@ -938,11 +944,11 @@ static uint16_t nvme_fw_log_info(NvmeCtrl *n, NvmeCmd *cmd, uint32_t buf_len,
                         DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
-                                uint32_t buf_len, uint64_t off,
-                                NvmeRequest *req)
+static uint16_t nvme_error_info(NvmeCtrl *n, uint8_t rae, uint32_t buf_len,
+                                uint64_t off, NvmeRequest *req)
 {
     uint32_t trans_len;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
     NvmeErrorLog errlog;
@@ -963,8 +969,10 @@ static uint16_t nvme_error_info(NvmeCtrl *n, NvmeCmd *cmd, uint8_t rae,
                         DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_get_log(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
+
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t dw12 = le32_to_cpu(cmd->cdw12);
@@ -999,11 +1007,11 @@ static uint16_t nvme_get_log(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
 
     switch (lid) {
     case NVME_LOG_ERROR_INFO:
-        return nvme_error_info(n, cmd, rae, len, off, req);
+        return nvme_error_info(n, rae, len, off, req);
     case NVME_LOG_SMART_INFO:
-        return nvme_smart_info(n, cmd, rae, len, off, req);
+        return nvme_smart_info(n, rae, len, off, req);
     case NVME_LOG_FW_SLOT_INFO:
-        return nvme_fw_log_info(n, cmd, len, off, req);
+        return nvme_fw_log_info(n, len, off, req);
     default:
         trace_pci_nvme_err_invalid_log_page(nvme_cid(req), lid);
         return NVME_INVALID_FIELD | NVME_DNR;
@@ -1021,9 +1029,9 @@ static void nvme_free_cq(NvmeCQueue *cq, NvmeCtrl *n)
     }
 }
 
-static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_del_cq(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeDeleteQ *c = (NvmeDeleteQ *)cmd;
+    NvmeDeleteQ *c = (NvmeDeleteQ *)&req->cmd;
     NvmeCQueue *cq;
     uint16_t qid = le16_to_cpu(c->qid);
 
@@ -1064,10 +1072,10 @@ static void nvme_init_cq(NvmeCQueue *cq, NvmeCtrl *n, uint64_t dma_addr,
     cq->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, nvme_post_cqes, cq);
 }
 
-static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeCQueue *cq;
-    NvmeCreateCq *c = (NvmeCreateCq *)cmd;
+    NvmeCreateCq *c = (NvmeCreateCq *)&req->cmd;
     uint16_t cqid = le16_to_cpu(c->cqid);
     uint16_t vector = le16_to_cpu(c->irq_vector);
     uint16_t qsize = le16_to_cpu(c->qsize);
@@ -1115,8 +1123,9 @@ static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd)
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c)
+static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
 
@@ -1126,9 +1135,10 @@ static uint16_t nvme_identify_ctrl(NvmeCtrl *n, NvmeIdentify *c)
                         prp2, DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c)
+static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeRequest *req)
 {
     NvmeNamespace *ns;
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint32_t nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
@@ -1146,8 +1156,9 @@ static uint16_t nvme_identify_ns(NvmeCtrl *n, NvmeIdentify *c)
                         prp2, DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c)
+static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     static const int data_len = NVME_IDENTIFY_DATA_SIZE;
     uint32_t min_nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
@@ -1184,8 +1195,9 @@ static uint16_t nvme_identify_nslist(NvmeCtrl *n, NvmeIdentify *c)
     return ret;
 }
 
-static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c)
+static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
     uint32_t nsid = le32_to_cpu(c->nsid);
     uint64_t prp1 = le64_to_cpu(c->prp1);
     uint64_t prp2 = le64_to_cpu(c->prp2);
@@ -1224,28 +1236,28 @@ static uint16_t nvme_identify_ns_descr_list(NvmeCtrl *n, NvmeIdentify *c)
                         DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_identify(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_identify(NvmeCtrl *n, NvmeRequest *req)
 {
-    NvmeIdentify *c = (NvmeIdentify *)cmd;
+    NvmeIdentify *c = (NvmeIdentify *)&req->cmd;
 
     switch (le32_to_cpu(c->cns)) {
     case NVME_ID_CNS_NS:
-        return nvme_identify_ns(n, c);
+        return nvme_identify_ns(n, req);
     case NVME_ID_CNS_CTRL:
-        return nvme_identify_ctrl(n, c);
+        return nvme_identify_ctrl(n, req);
     case NVME_ID_CNS_NS_ACTIVE_LIST:
-        return nvme_identify_nslist(n, c);
+        return nvme_identify_nslist(n, req);
     case NVME_ID_CNS_NS_DESCR_LIST:
-        return nvme_identify_ns_descr_list(n, c);
+        return nvme_identify_ns_descr_list(n, req);
     default:
         trace_pci_nvme_err_invalid_identify_cns(le32_to_cpu(c->cns));
         return NVME_INVALID_FIELD | NVME_DNR;
     }
 }
 
-static uint16_t nvme_abort(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_abort(NvmeCtrl *n, NvmeRequest *req)
 {
-    uint16_t sqid = le32_to_cpu(cmd->cdw10) & 0xffff;
+    uint16_t sqid = le32_to_cpu(req->cmd.cdw10) & 0xffff;
 
     req->cqe.result = 1;
     if (nvme_check_sqid(n, sqid)) {
@@ -1295,8 +1307,9 @@ static inline uint64_t nvme_get_timestamp(const NvmeCtrl *n)
     return cpu_to_le64(ts.all);
 }
 
-static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -1306,8 +1319,9 @@ static uint16_t nvme_get_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd)
                         prp2, DMA_DIRECTION_FROM_DEVICE);
 }
 
-static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -1381,7 +1395,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         result = n->features.async_config;
         goto out;
     case NVME_TIMESTAMP:
-        return nvme_get_feature_timestamp(n, cmd);
+        return nvme_get_feature_timestamp(n, req);
     default:
         break;
     }
@@ -1427,10 +1441,11 @@ out:
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd)
+static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeRequest *req)
 {
     uint16_t ret;
     uint64_t timestamp;
+    NvmeCmd *cmd = &req->cmd;
     uint64_t prp1 = le64_to_cpu(cmd->dptr.prp1);
     uint64_t prp2 = le64_to_cpu(cmd->dptr.prp2);
 
@@ -1445,8 +1460,9 @@ static uint16_t nvme_set_feature_timestamp(NvmeCtrl *n, NvmeCmd *cmd)
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeRequest *req)
 {
+    NvmeCmd *cmd = &req->cmd;
     uint32_t dw10 = le32_to_cpu(cmd->cdw10);
     uint32_t dw11 = le32_to_cpu(cmd->cdw11);
     uint32_t nsid = le32_to_cpu(cmd->nsid);
@@ -1537,14 +1553,14 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         n->features.async_config = dw11;
         break;
     case NVME_TIMESTAMP:
-        return nvme_set_feature_timestamp(n, cmd);
+        return nvme_set_feature_timestamp(n, req);
     default:
         return NVME_FEAT_NOT_CHANGEABLE | NVME_DNR;
     }
     return NVME_SUCCESS;
 }
 
-static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_aer(NvmeCtrl *n, NvmeRequest *req)
 {
     trace_pci_nvme_aer(nvme_cid(req));
 
@@ -1563,33 +1579,33 @@ static uint16_t nvme_aer(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
     return NVME_NO_COMPLETE;
 }
 
-static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
+static uint16_t nvme_admin_cmd(NvmeCtrl *n, NvmeRequest *req)
 {
-    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), cmd->opcode);
+    trace_pci_nvme_admin_cmd(nvme_cid(req), nvme_sqid(req), req->cmd.opcode);
 
-    switch (cmd->opcode) {
+    switch (req->cmd.opcode) {
     case NVME_ADM_CMD_DELETE_SQ:
-        return nvme_del_sq(n, cmd);
+        return nvme_del_sq(n, req);
     case NVME_ADM_CMD_CREATE_SQ:
-        return nvme_create_sq(n, cmd);
+        return nvme_create_sq(n, req);
     case NVME_ADM_CMD_GET_LOG_PAGE:
-        return nvme_get_log(n, cmd, req);
+        return nvme_get_log(n, req);
     case NVME_ADM_CMD_DELETE_CQ:
-        return nvme_del_cq(n, cmd);
+        return nvme_del_cq(n, req);
     case NVME_ADM_CMD_CREATE_CQ:
-        return nvme_create_cq(n, cmd);
+        return nvme_create_cq(n, req);
     case NVME_ADM_CMD_IDENTIFY:
-        return nvme_identify(n, cmd);
+        return nvme_identify(n, req);
     case NVME_ADM_CMD_ABORT:
-        return nvme_abort(n, cmd, req);
+        return nvme_abort(n, req);
     case NVME_ADM_CMD_SET_FEATURES:
-        return nvme_set_feature(n, cmd, req);
+        return nvme_set_feature(n, req);
     case NVME_ADM_CMD_GET_FEATURES:
-        return nvme_get_feature(n, cmd, req);
+        return nvme_get_feature(n, req);
     case NVME_ADM_CMD_ASYNC_EV_REQ:
-        return nvme_aer(n, cmd, req);
+        return nvme_aer(n, req);
     default:
-        trace_pci_nvme_err_invalid_admin_opc(cmd->opcode);
+        trace_pci_nvme_err_invalid_admin_opc(req->cmd.opcode);
         return NVME_INVALID_OPCODE | NVME_DNR;
     }
 }
@@ -1613,11 +1629,12 @@ static void nvme_process_sq(void *opaque)
         req = QTAILQ_FIRST(&sq->req_list);
         QTAILQ_REMOVE(&sq->req_list, req, entry);
         QTAILQ_INSERT_TAIL(&sq->out_req_list, req, entry);
-        memset(&req->cqe, 0, sizeof(req->cqe));
+        nvme_req_clear(req);
         req->cqe.cid = cmd.cid;
+        memcpy(&req->cmd, &cmd, sizeof(NvmeCmd));
 
-        status = sq->sqid ? nvme_io_cmd(n, &cmd, req) :
-            nvme_admin_cmd(n, &cmd, req);
+        status = sq->sqid ? nvme_io_cmd(n, req) :
+            nvme_admin_cmd(n, req);
         if (status != NVME_NO_COMPLETE) {
             req->status = status;
             nvme_enqueue_req_completion(cq, req);
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 137cd8c2bf..52ba794f2e 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -21,9 +21,11 @@ typedef struct NvmeAsyncEvent {
 
 typedef struct NvmeRequest {
     struct NvmeSQueue       *sq;
+    struct NvmeNamespace    *ns;
     BlockAIOCB              *aiocb;
     uint16_t                status;
     NvmeCqe                 cqe;
+    NvmeCmd                 cmd;
     BlockAcctCookie         acct;
     QEMUSGList              qsg;
     QEMUIOVector            iov;