From patchwork Fri Jan 21 14:22:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 1582598 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=TY3+IsnS; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by bilbo.ozlabs.org (Postfix) with ESMTP id 4JgM7h1vvKz9t3b for ; Sat, 22 Jan 2022 01:24:00 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350657AbiAUOX7 (ORCPT ); Fri, 21 Jan 2022 09:23:59 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:55140 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350730AbiAUOX6 (ORCPT ); Fri, 21 Jan 2022 09:23:58 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 8B94FB81FF8 for ; Fri, 21 Jan 2022 14:23:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CC75C340E1; Fri, 21 Jan 2022 14:23:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1642775036; bh=7WrJz6dlTRk2aHPY75u60v8JhqO+CiYno/zQsi8r9jc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=TY3+IsnSiEehTLocCtVG2joPKuXI1U/OS5fL8ljGzLssY87Jy6h48ccWCKS96dSya 0/grcFSLEqEVzyvQqTv+xwOLunbXeB8OwwNrOGFqQnrHxdNjmYgufUhsrNPeJSwN7L obZNjhFGEggh8SEyCBfL7aLd/xKV3xQaLm1LF5gjojRrMxUyrkSsh0FThWFaIeCNvr 3T6/8TKoc+uy+T6z2FnyIWODtuvN/aFviQBID1KAbFUjzwAEXg5ETgYRqaocDqaCa5 lgsiHbJqj33vxUhkNwzRa+pBFkPyo6j81ewcp8rLWB5FODgKEXsYRRtUcB0HkmtFbq nwzKuFTOIQByg== Received: by pali.im (Postfix) id 19D52C83; Fri, 21 Jan 2022 15:23:54 +0100 (CET) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Martin Mares , Bjorn Helgaas , =?utf-8?q?Krzysztof_Wilczy=C5=84ski?= , Matthew Wilcox , linux-pci@vger.kernel.org Subject: [PATCH pciutils 2/4] libpci: sysfs: Implement support for PCI_FILL_PARENT Date: Fri, 21 Jan 2022 15:22:56 +0100 Message-Id: <20220121142258.28170-3-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220121142258.28170-1-pali@kernel.org> References: <20220121142258.28170-1-pali@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org --- lib/sysfs.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/lib/sysfs.c b/lib/sysfs.c index 0dbd127ff53b..1db1b1a7752b 100644 --- a/lib/sysfs.c +++ b/lib/sysfs.c @@ -390,6 +390,37 @@ sysfs_fill_info(struct pci_dev *d, unsigned int flags) { done |= sysfs_get_resources(d); } + if (flags & PCI_FILL_PARENT) + { + unsigned int domain, bus, dev, func; + char *path_abs, *path_canon, *name; + char path_rel[OBJNAMELEN]; + struct pci_dev *parent; + + /* Construct sysfs path for parent device */ + sysfs_obj_name(d, "..", path_rel); + path_abs = realpath(path_rel, NULL); + name = path_abs ? strrchr(path_abs, '/') : NULL; + name = name ? name+1 : name; + parent = NULL; + + if (name && sscanf(name, "%x:%x:%x.%d", &domain, &bus, &dev, &func) == 4 && domain <= 0x7fffffff) + for (parent = d->access->devices; parent; parent = parent->next) + if (parent->domain == (int)domain && parent->bus == bus && parent->dev == dev && parent->func == func) + break; + + if (parent) + { + /* Check if parsed BDF address from parent sysfs device is really expected PCI device */ + sysfs_obj_name(parent, ".", path_rel); + path_canon = realpath(path_rel, NULL); + if (path_canon && strcmp(path_canon, path_abs) == 0) + { + d->parent = parent; + done |= PCI_FILL_PARENT; + } + } + } } if (flags & PCI_FILL_PHYS_SLOT)