[v2] Support persistent reservation operations

[PATCH v2 07/11] hw/nvme: add helper functions for converting reservation types

Changqi Lu posted 11 patches 6 months, 2 weeks ago

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Maintainers: Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>, Fam Zheng <fam@euphon.net>, Ronnie Sahlberg <ronniesahlberg@gmail.com>, Paolo Bonzini <pbonzini@redhat.com>, Peter Lieven <pl@dlhnet.de>, Keith Busch <kbusch@kernel.org>, Klaus Jensen <its@irrelevant.dk>, Jesper Devantier <foss@defmacro.it>, "Philippe Mathieu-Daudé" <philmd@linaro.org>

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[PATCH v2 07/11] hw/nvme: add helper functions for converting reservation types

Posted by Changqi Lu 6 months, 2 weeks ago

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.

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