From 0ca626639329c687075f8fe352d4ffabbf98288d Mon Sep 17 00:00:00 2001
From: Greg Dallavalle <greg.dallavalle@lightstep.com>
Date: Wed, 16 Aug 2023 21:24:20 -0500
Subject: [PATCH] fix IOCounters() SerialNumber enumeration

---
 disk/disk_linux.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/disk/disk_linux.go b/disk/disk_linux.go
index 2a8c50a..f43780f 100644
--- a/disk/disk_linux.go
+++ b/disk/disk_linux.go
@@ -474,7 +474,11 @@ func IOCountersWithContext(ctx context.Context, names ...string) (map[string]IOC
 		}
 		d.Name = name
 
-		d.SerialNumber, _ = SerialNumberWithContext(ctx, name)
+		// Names passed in can be full paths (/dev/sda) or just device names (sda).
+		// Since `name`` here is already a basename, re-add a hardcoded /dev path.
+		// This is not ideal, but we may break the API by changing how SerialNumberWithContext
+		// works.
+		d.SerialNumber, _ = SerialNumberWithContext(ctx, "/dev/"+name)
 		d.Label, _ = LabelWithContext(ctx, name)
 
 		ret[name] = d