From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9910ED72355 for ; Fri, 23 Jan 2026 08:59:13 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E18F96B0472; Fri, 23 Jan 2026 03:59:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id DFAC16B0474; Fri, 23 Jan 2026 03:59:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id D19E06B0475; Fri, 23 Jan 2026 03:59:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id BE44B6B0472 for ; Fri, 23 Jan 2026 03:59:12 -0500 (EST) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay03.hostedemail.com (Postfix) with ESMTP id 48BDBB904D for ; Fri, 23 Jan 2026 08:59:12 +0000 (UTC) X-FDA: 84362629344.16.C7BAD91 Received: from out-178.mta1.migadu.com (out-178.mta1.migadu.com [95.215.58.178]) by imf10.hostedemail.com (Postfix) with ESMTP id 5AFA7C0002 for ; Fri, 23 Jan 2026 08:59:10 +0000 (UTC) Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="a7IIP/Es"; spf=pass (imf10.hostedemail.com: domain of hui.zhu@linux.dev designates 95.215.58.178 as permitted sender) smtp.mailfrom=hui.zhu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1769158750; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=uLmLgIc/WysrcWe9//I7t11dZt4RG+riPvAd1pdlrBg=; b=xEZBS3p7B+L3MKtXOTOLYjFDfhOv9sJwWLpNQm5E6akRbZF+8EntatWyQ6WMrrmAEsaXe+ ztaxOnovpjI8R7ywe9uBEUid7G0LygEbkix1okQPXnOO+cb+QFmNWvsUbPJprmbN4uH0cN WZhoG1TqlOZ9L3Gqyn4uWBsIMW6giP4= ARC-Authentication-Results: i=1; imf10.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b="a7IIP/Es"; spf=pass (imf10.hostedemail.com: domain of hui.zhu@linux.dev designates 95.215.58.178 as permitted sender) smtp.mailfrom=hui.zhu@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1769158750; a=rsa-sha256; cv=none; b=MIMLzcZO52db2tmcuHN329AIBpAe/bPYQk8xEZb2gTSxZuv1E6PRtnqfXJRh02k9zvN3Z6 zDGehkOp6rvvpNUmp7Pef7O0mwZbHVcVa39VIf/49814bORazD76l8ac2uSyiMfc0M5z0g AUzgDd0we5YpK+bA/rT/Ahu42K3iZHk= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1769158746; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=uLmLgIc/WysrcWe9//I7t11dZt4RG+riPvAd1pdlrBg=; b=a7IIP/EsFUJnD3r7OnHIdd2/eiTbPkC3e6yHe7BggslKBJxB4oQ47RRY0b98uf/B/WTkxM OQmGL1/JCv/S9EGgOwUTCr3OVVhK/BTpgiHN8sZ8WSgXM0gPOvPGTUX26n9gi3LG9mgpSZ nAR6Ug/78D3j1Ymvcl56/aRR5+vBNjw= From: Hui Zhu To: Andrew Morton , Johannes Weiner , Michal Hocko , Roman Gushchin , Shakeel Butt , Muchun Song , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Shuah Khan , Peter Zijlstra , Miguel Ojeda , Nathan Chancellor , Kees Cook , Tejun Heo , Jeff Xu , mkoutny@suse.com, Jan Hendrik Farr , Christian Brauner , Randy Dunlap , Brian Gerst , Masahiro Yamada , davem@davemloft.net, Jakub Kicinski , Jesper Dangaard Brouer , JP Kobryn , Willem de Bruijn , Jason Xing , Paul Chaignon , Anton Protopopov , Amery Hung , Chen Ridong , Lance Yang , Jiayuan Chen , linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: Hui Zhu , Geliang Tang Subject: [RFC PATCH bpf-next v3 07/12] libbpf: Support passing user-defined flags for struct_ops Date: Fri, 23 Jan 2026 16:58:01 +0800 Message-ID: <006635a13eeae0fe8da56447bc5131f6a80a48bf.1769157382.git.zhuhui@kylinos.cn> In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 5AFA7C0002 X-Stat-Signature: wfzgdsem8yqqbgmwkb6u68nyuh8a6s4w X-Rspam-User: X-HE-Tag: 1769158750-49443 X-HE-Meta: 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 8+mzxn9c JQFcsPju6GY5d4hdlMoInAqQIxUKSGB7AgMUU8UORfupCM1i03C+6TbH+T3gY+k0Dej9RfF6TUEp3OxTAnePK1Acst5B7+4GONSFdz1r5m9DW0FPit0A8aIQPLEIl1zFE0ao255HY/ZOEnxHa4hJRFczMuTuWW2NGTUsE0EtcVVpdrEV0GePkVT3A71B/P0txwdJ6mDRQwDX2l3gdcrASAHy06Bp7ezcDXklUUVI6hdvZF44wawiY/1bgnnXkUTh6lN5BMmfJvZqWquMlupIzGOkqdswz2nRGmWvGOkCMa0uEUh8= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Hui Zhu Building on the previous change that added flags to the kernel's link creation path, this patch exposes this functionality through libbpf. The `bpf_struct_ops_opts` struct is extended with a `flags` member, which is then passed to the `bpf_link_create` syscall within `bpf_map__attach_struct_ops_opts`. This enables userspace applications to pass flags, such as `BPF_F_ALLOW_OVERRIDE`, when attaching struct_ops to cgroups, providing more control over the attachment behavior in nested hierarchies. Signed-off-by: Geliang Tang Signed-off-by: Hui Zhu --- tools/lib/bpf/libbpf.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 37eb4f96b28e..089bd1325468 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -13508,6 +13508,7 @@ struct bpf_link *bpf_map__attach_struct_ops_opts(const struct bpf_map *map, } link_opts.cgroup.relative_fd = OPTS_GET(opts, relative_fd, 0); + link_opts.flags = OPTS_GET(opts, flags, 0); fd = bpf_link_create(map->fd, 0, BPF_STRUCT_OPS, &link_opts); if (fd < 0) { -- 2.43.0