netdev - [PATCH net-next 2/7] tools: ynl: copy netlink error to NlError

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Date: Mon,  1 Apr 2024 18:05:14 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	shuah@...nel.org,
	sdf@...gle.com,
	donald.hunter@...il.com,
	linux-kselftest@...r.kernel.org,
	petrm@...dia.com,
	Jakub Kicinski <kuba@...nel.org>,
	jiri@...nulli.us
Subject: [PATCH net-next 2/7] tools: ynl: copy netlink error to NlError

Typing e.nl_msg.error when processing exception is a bit tedious
and counter-intuitive. Set a local .error member to the positive
value of the netlink level error.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
CC: donald.hunter@...il.com
CC: jiri@...nulli.us
---
 tools/net/ynl/lib/ynl.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/net/ynl/lib/ynl.py b/tools/net/ynl/lib/ynl.py
index 82d3c98067aa..b30210f537f7 100644
--- a/tools/net/ynl/lib/ynl.py
+++ b/tools/net/ynl/lib/ynl.py
@@ -100,9 +100,10 @@ from .nlspec import SpecFamily
 class NlError(Exception):
   def __init__(self, nl_msg):
     self.nl_msg = nl_msg
+    self.error = -nl_msg.error
 
   def __str__(self):
-    return f"Netlink error: {os.strerror(-self.nl_msg.error)}\n{self.nl_msg}"
+    return f"Netlink error: {os.strerror(self.error)}\n{self.nl_msg}"
 
 
 class ConfigError(Exception):
-- 
2.44.0