[PATCH 13/16] hw/block/nvme: add a namespace reference in NvmeRequest

[Klaus Jensen <its@irrelevant.dk>]

From: Klaus Jensen <k.jensen@samsung.com>

Instead of passing around the NvmeNamespace, add it as a member in the
NvmeRequest structure.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.c | 21 ++++++++++-----------
 hw/block/nvme.h |  1 +
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 431f26c2f589..54cd20f1ce22 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -211,6 +211,7 @@ 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));
 }
 
@@ -610,8 +611,7 @@ 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, NvmeCmd *cmd, NvmeRequest *req)
 {
     block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0,
          BLOCK_ACCT_FLUSH);
@@ -620,10 +620,10 @@ 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, NvmeCmd *cmd, NvmeRequest *req)
 {
     NvmeRwCmd *rw = (NvmeRwCmd *)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);
@@ -647,10 +647,10 @@ 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, NvmeCmd *cmd, NvmeRequest *req)
 {
     NvmeRwCmd *rw = (NvmeRwCmd *)cmd;
+    NvmeNamespace *ns = req->ns;
     uint32_t nlb  = le32_to_cpu(rw->nlb) + 1;
     uint64_t slba = le64_to_cpu(rw->slba);
 
@@ -706,7 +706,6 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeNamespace *ns, NvmeCmd *cmd,
 
 static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
 {
-    NvmeNamespace *ns;
     uint32_t nsid = le32_to_cpu(cmd->nsid);
 
     trace_pci_nvme_io_cmd(nvme_cid(req), nsid, nvme_sqid(req), cmd->opcode);
@@ -716,15 +715,15 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeCmd *cmd, NvmeRequest *req)
         return NVME_INVALID_NSID | NVME_DNR;
     }
 
-    ns = &n->namespaces[nsid - 1];
+    req->ns = &n->namespaces[nsid - 1];
     switch (cmd->opcode) {
     case NVME_CMD_FLUSH:
-        return nvme_flush(n, ns, cmd, req);
+        return nvme_flush(n, cmd, req);
     case NVME_CMD_WRITE_ZEROES:
-        return nvme_write_zeroes(n, ns, cmd, req);
+        return nvme_write_zeroes(n, cmd, req);
     case NVME_CMD_WRITE:
     case NVME_CMD_READ:
-        return nvme_rw(n, ns, cmd, req);
+        return nvme_rw(n, cmd, req);
     default:
         trace_pci_nvme_err_invalid_opc(cmd->opcode);
         return NVME_INVALID_OPCODE | NVME_DNR;
diff --git a/hw/block/nvme.h b/hw/block/nvme.h
index 137cd8c2bf20..586fd3d62700 100644
--- a/hw/block/nvme.h
+++ b/hw/block/nvme.h
@@ -21,6 +21,7 @@ typedef struct NvmeAsyncEvent {
 
 typedef struct NvmeRequest {
     struct NvmeSQueue       *sq;
+    struct NvmeNamespace    *ns;
     BlockAIOCB              *aiocb;
     uint16_t                status;
     NvmeCqe                 cqe;
-- 
2.27.0