netdev - Re: uapi-header: doesn't update header include guard macros

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Date: Tue, 3 Oct 2023 14:48:11 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Chuck Lever III <chuck.lever@...cle.com>
Cc: "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>
Subject: Re: uapi-header: doesn't update header include guard macros

On Tue, 3 Oct 2023 14:45:13 -0700 Jakub Kicinski wrote:
> Fair point, perhaps we can do something like the patch below.
> LMK if it's good enough.
> 
> We don't have any family of this nature in the networking tree.
> Would you need this for 6.7 i.e. the next merge window already?
> I can put it on top of an -rc tag when applying, so you can merge..

Sorry I had it half-committed, this should apply more cleanly:

----->8---------

tools: ynl-gen: use uapi header name for the header guard

Chuck points out that we should use the uapi-header property
when generating the guard. Otherwise we may generate the same
guard as another file in the tree.

Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 tools/net/ynl/ynl-gen-c.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/net/ynl/ynl-gen-c.py b/tools/net/ynl/ynl-gen-c.py
index 897af958cee8..168fe612b029 100755
--- a/tools/net/ynl/ynl-gen-c.py
+++ b/tools/net/ynl/ynl-gen-c.py
@@ -805,6 +805,10 @@ from lib import SpecFamily, SpecAttrSet, SpecAttr, SpecOperation, SpecEnumSet, S
             self.uapi_header = self.yaml['uapi-header']
         else:
             self.uapi_header = f"linux/{self.name}.h"
+        if self.uapi_header.startswith("linux/") and self.uapi_header.endswith('.h'):
+            self.uapi_header_name = self.uapi_header[6:-2]
+        else:
+            self.uapi_header_name = self.name
 
     def resolve(self):
         self.resolve_up(super())
@@ -2124,7 +2128,7 @@ _C_KW = {
 
 
 def render_uapi(family, cw):
-    hdr_prot = f"_UAPI_LINUX_{family.name.upper()}_H"
+    hdr_prot = f"_UAPI_LINUX_{c_upper(family.uapi_header_name)}_H"
     cw.p('#ifndef ' + hdr_prot)
     cw.p('#define ' + hdr_prot)
     cw.nl()
-- 
2.41.0