This commit introduces two helper functions
that facilitate the conversion between the
reservation types used in the NVME protocol
and those used in the block layer.

Signed-off-by: Changqi Lu <luchangqi.123@bytedance.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
---
 hw/nvme/nvme.h | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h
index bed8191bd5..6abe479410 100644
--- a/hw/nvme/nvme.h
+++ b/hw/nvme/nvme.h
@@ -474,6 +474,46 @@ static inline const char *nvme_io_opc_str(uint8_t opc)
     }
 }
 
+static inline NVMEResvType block_pr_type_to_nvme(BlockPrType type)
+{
+    switch (type) {
+    case BLK_PR_WRITE_EXCLUSIVE:
+        return NVME_RESV_WRITE_EXCLUSIVE;
+    case BLK_PR_EXCLUSIVE_ACCESS:
+        return NVME_RESV_EXCLUSIVE_ACCESS;
+    case BLK_PR_WRITE_EXCLUSIVE_REGS_ONLY:
+        return NVME_RESV_WRITE_EXCLUSIVE_REGS_ONLY;
+    case BLK_PR_EXCLUSIVE_ACCESS_REGS_ONLY:
+        return NVME_RESV_EXCLUSIVE_ACCESS_REGS_ONLY;
+    case BLK_PR_WRITE_EXCLUSIVE_ALL_REGS:
+        return NVME_RESV_WRITE_EXCLUSIVE_ALL_REGS;
+    case BLK_PR_EXCLUSIVE_ACCESS_ALL_REGS:
+        return NVME_RESV_EXCLUSIVE_ACCESS_ALL_REGS;
+    }
+
+    return 0;
+}
+
+static inline BlockPrType nvme_pr_type_to_block(NVMEResvType type)
+{
+    switch (type) {
+    case NVME_RESV_WRITE_EXCLUSIVE:
+        return BLK_PR_WRITE_EXCLUSIVE;
+    case NVME_RESV_EXCLUSIVE_ACCESS:
+        return BLK_PR_EXCLUSIVE_ACCESS;
+    case NVME_RESV_WRITE_EXCLUSIVE_REGS_ONLY:
+        return BLK_PR_WRITE_EXCLUSIVE_REGS_ONLY;
+    case NVME_RESV_EXCLUSIVE_ACCESS_REGS_ONLY:
+        return BLK_PR_EXCLUSIVE_ACCESS_REGS_ONLY;
+    case NVME_RESV_WRITE_EXCLUSIVE_ALL_REGS:
+        return BLK_PR_WRITE_EXCLUSIVE_ALL_REGS;
+    case NVME_RESV_EXCLUSIVE_ACCESS_ALL_REGS:
+        return BLK_PR_EXCLUSIVE_ACCESS_ALL_REGS;
+    }
+
+    return 0;
+}
+
 typedef struct NvmeSQueue {
     struct NvmeCtrl *ctrl;
     uint16_t    sqid;
-- 
2.20.1

On Wed, May 08, 2024 at 05:36:27PM +0800, Changqi Lu wrote:
> This commit introduces two helper functions
> that facilitate the conversion between the
> reservation types used in the NVME protocol
> and those used in the block layer.
> 
> Signed-off-by: Changqi Lu <luchangqi.123@bytedance.com>
> Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
> ---
>  hw/nvme/nvme.h | 40 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>