use GlobalContext whenever possible (#9280)

This change is throughout the codebase to
ensure that all codepaths honor GlobalContext

cmd/handler-utils.go

@@ -51,7 +51,7 @@ func parseLocationConstraint(r *http.Request) (location string, s3Error APIError
 	locationConstraint := createBucketLocationConfiguration{}
 	err := xmlDecoder(r.Body, &locationConstraint, r.ContentLength)
 	if err != nil && r.ContentLength != 0 {
-		logger.LogIf(context.Background(), err)
+		logger.LogIf(GlobalContext, err)
 		// Treat all other failures as XML parsing errors.
 		return "", ErrMalformedXML
 	} // else for both err as nil or io.EOF
@@ -431,7 +431,7 @@ func getResource(path string, host string, domains []string) (string, error) {
 		if host, _, err = net.SplitHostPort(host); err != nil {
 			reqInfo := (&logger.ReqInfo{}).AppendTags("host", host)
 			reqInfo.AppendTags("path", path)
-			ctx := logger.SetReqInfo(context.Background(), reqInfo)
+			ctx := logger.SetReqInfo(GlobalContext, reqInfo)
 			logger.LogIf(ctx, err)
 			return "", err
 		}