From: Peter Maydell <peter.maydell@linaro.org>

The Python os.setxattr() API is Linux-specific, so trying to use
it on other OSes triggers a failure:

  File "/Users/pm215/src/qemu/tests/functional/qemu_test/asset.py",
line 227, in fetch
    os.setxattr(str(tmp_cache_file), "user.qemu-asset-url",
    ^^^^^^^^^^^
AttributeError: module 'os' has no attribute 'setxattr'

Since we only set the attributes here for informational
purposes, skip them when os.setxattr() isn't available.

Cc: qemu-stable@nongnu.org
Fixes: 9903217a4ed013 ("tests/functional: add a module for handling asset download & caching")
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <th.huth+qemu@posteo.eu>
Message-id: 20260501115506.3792110-1-peter.maydell@linaro.org
(cherry picked from commit 039b057c09c6a9742b91b8f29604651ba3fdb558)
(Mjt: context fixup for 10.2.x)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/tests/functional/qemu_test/asset.py b/tests/functional/qemu_test/asset.py
index bae40765ce..ef0dff921d 100644
--- a/tests/functional/qemu_test/asset.py
+++ b/tests/functional/qemu_test/asset.py
@@ -207,11 +207,14 @@ def fetch(self):
             raise AssetError(self, "Download retries exceeded", transient=True)
 
         try:
-            # Set these just for informational purposes
-            os.setxattr(str(tmp_cache_file), "user.qemu-asset-url",
-                        self.url.encode('utf8'))
-            os.setxattr(str(tmp_cache_file), "user.qemu-asset-hash",
-                        self.hash.encode('utf8'))
+            # Set these just for informational purposes. Note that
+            # setxattr is Linux-only; as this is only informational
+            # we can simply skip it on other platforms.
+            if hasattr(os, "setxattr"):
+                os.setxattr(str(tmp_cache_file), "user.qemu-asset-url",
+                            self.url.encode('utf8'))
+                os.setxattr(str(tmp_cache_file), "user.qemu-asset-hash",
+                            self.hash.encode('utf8'))
         except Exception as e:
             self.log.debug("Unable to set xattr on %s: %s", tmp_cache_file, e)
 
-- 
2.47.3