From a859eb9f8f64e116671048a43a07d87bc6527a55 Mon Sep 17 00:00:00 2001
From: Klaus Jensen <k.jensen@samsung.com>
Date: Fri, 29 Apr 2022 10:33:32 +0200
Subject: [PATCH] hw/nvme: enforce common serial per subsystem

The Identify Controller Serial Number (SN) is the serial number for the
NVM subsystem and must be the same across all controller in the NVM
subsystem.

Enforce this.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/nvme/nvme.h   | 1 +
 hw/nvme/subsys.c | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/hw/nvme/nvme.h b/hw/nvme/nvme.h
index 6773819325..e41771604f 100644
--- a/hw/nvme/nvme.h
+++ b/hw/nvme/nvme.h
@@ -48,6 +48,7 @@ typedef struct NvmeSubsystem {
     DeviceState parent_obj;
     NvmeBus     bus;
     uint8_t     subnqn[256];
+    char        *serial;
 
     NvmeCtrl      *ctrls[NVME_MAX_CONTROLLERS];
     NvmeNamespace *namespaces[NVME_MAX_NAMESPACES + 1];
diff --git a/hw/nvme/subsys.c b/hw/nvme/subsys.c
index fb58d63950..691a90d209 100644
--- a/hw/nvme/subsys.c
+++ b/hw/nvme/subsys.c
@@ -27,6 +27,13 @@ int nvme_subsys_register_ctrl(NvmeCtrl *n, Error **errp)
         return -1;
     }
 
+    if (!subsys->serial) {
+        subsys->serial = g_strdup(n->params.serial);
+    } else if (strcmp(subsys->serial, n->params.serial)) {
+        error_setg(errp, "invalid controller serial");
+        return -1;
+    }
+
     subsys->ctrls[cntlid] = n;
 
     for (nsid = 1; nsid < ARRAY_SIZE(subsys->namespaces); nsid++) {