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Tue, 15 Jul 2025 10:35:25 +0000 Received: from DS7PR10MB5037.namprd10.prod.outlook.com ([fe80::824a:572e:d9d7:e9f1]) by DS7PR10MB5037.namprd10.prod.outlook.com ([fe80::824a:572e:d9d7:e9f1%6]) with mapi id 15.20.8901.021; Tue, 15 Jul 2025 10:35:25 +0000 From: Nick Alcock To: Kris Van Hees Cc: dtrace@lists.linux.dev, dtrace-devel@oss.oracle.com Subject: Re: [PATCH 2/4] provider, cg: add reject_clasue() callback References: Emacs: the prosecution rests its case. 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X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: xB35MW7hhnvexaoIvFTw5wAZQh8NQezoMZrRWlcUhafGEa57hKYvUCiTfDzeD7amJl5z9EYfcnFm3tU8aJ1A3w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR10MB5921 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-15_01,2025-07-14_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 mlxscore=0 malwarescore=0 phishscore=0 spamscore=0 mlxlogscore=999 bulkscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2505160000 definitions=main-2507150096 X-Authority-Analysis: v=2.4 cv=d9T1yQjE c=1 sm=1 tr=0 ts=68762ef6 b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=wKuvFiaSGQ0qltdbU6+NXLB8nM8=:19 a=Ol13hO9ccFRV9qXi2t6ftBPywas=:19 a=xqWC_Br6kY4A:10 a=Wb1JkmetP80A:10 a=GoEa3M9JfhUA:10 a=yPCof4ZbAAAA:8 a=MAkJLcnNp5H3FZjfsRkA:9 cc=ntf awl=host:12061 X-Proofpoint-ORIG-GUID: nCi6Xhcwbk0K7TnJYCvh6Hroz6ZBJCas X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzE1MDA5NSBTYWx0ZWRfX/Ai4z1dZ1BOe bNMw/WwrTX7IdbrWJAEU2DBHrcjLpbi4epHtublixRxWQpiUn/jOidRSG1dzge988zGvrOZsyMY BiqfA74cICxtBdYZvSE4byMb62t73QNspVMtAuWDrxb3Z/pF4BTbxLzhCZ8mSlta0mKDvCRUZhq e1qfT+EMkx3VGLCZYfZ/qT88LO7rklEDL4Xy+Oi2ihu9kPVy11fb3z3GNH3Cb9AUyJcMFUAGpCP oaymb6/MfJTWwCF7PFPCBlufwrrzCvw7axAF3xW0Yau9nslp1qHIW7l7KqHYRdmIKusn//f5Z0V zSG6Z/9X4E6neoxyywjAl4KJWfxE9Jxds+6ORVQ8zV1ZPNjfn+Hl9IW/3QIKDEov0dV6vDODf/V 9rsHerh7l7m2ePlXYmf65g6TpwSGbRQZ+U3nYlQrVHMqSkUuKXqEiDvDj7gmC0H8DRjFgoG4 X-Proofpoint-GUID: nCi6Xhcwbk0K7TnJYCvh6Hroz6ZBJCas On 15 Jul 2025, Kris Van Hees spake thusly: > Future providers will require functionality to determine whether a > clause for one of its probes needs to be rejected for some reason. > > Since the callback is invoked during trampoline creation, rejection > must result in a compilation error. The callback is responsible for > this. If it returns, the clause is accepted. > > Signed-off-by: Kris Van Hees Reviewed-by: Nick Alcock modulo the comment nit below. > + /* > + * Ensure the clause is valid for the probe. Call the reject_clause() > + * hook if defined, otherwise apply default checks. Rejection of the > + * clause must be reported as a compilation error. > + */ > + if (prp->prov->impl->reject_clause != NULL) > + prp->prov->impl->reject_clause(prp, sdp->dtsd_clauseflags); This change applies default checks *and* the reject_clause() checks, if any, not one or the other. -- NULL && (void)