From patchwork Mon Jan 22 22:16:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maciej Fijalkowski X-Patchwork-Id: 13526304 X-Patchwork-Delegate: bpf@iogearbox.net Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C2DA7487B7; Mon, 22 Jan 2024 22:16:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705961782; cv=none; b=gO8qsAFyfCmTXgI5d+6xvC8Wom/OZwGIFRjF6o+5x6KnpBbK6v4YaeAObKAXmCFT6BOoIxKRgnZtucFX/vgJVTGMWx+4H5D9s0n3ZtpVXWQigJ/cj0nOlgnkuoYou+fij3TyhThD98H/eZChKnBfNxmoX+YDo8k8ihIV+/k7Ox4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705961782; c=relaxed/simple; bh=eJyulSxFkLgss8vVHYcG6J+Lt6BM/8SR04Fb1v9dFa8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=hO9Wn16jO1izTD4v3M9hVxp9F4RX5KuUGT4VVmA3JMKySv8AsT+ez+eE5JaTJfv90etUXLbf6EEfrJPGSMAK5nML1daJexZy/ig4y2giWoTAwz8LgW2Jxcbx/mR+N0rX0FjjiNl2GrIrJDYnSnZK7JI87HPD0qVUg4sjV+2yDPE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=Ns6vkiqz; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="Ns6vkiqz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1705961781; x=1737497781; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eJyulSxFkLgss8vVHYcG6J+Lt6BM/8SR04Fb1v9dFa8=; b=Ns6vkiqzVub03FbsBOjGa2HJqPkzQVFpki9KbPc+q2vZK/qOb/G0lDDc qPpW2YTzO8hRW3DCXnCT+K8Z9/9NF7Qf7ct/elEpZ23bRE+igw2a7Ohsk uf4Bv047uzXMPVq5gbkP5PAMJDkwSZMiYmmdHSogIXX4Ce92qWS3kouT1 Tt7eyT+gk0WLRrnR5Do/5NPnlg8yh30yuP5fWVuOI+QprTEPbuYNOUcuH vuqUDFnTq/UZt1lKu13RSa4bVNogWxDfVkN5/j2NAO6EaLn1CkPvW46Xf RKn9mdlVvbCACu/XhBPb3TnVUwvvrVWTzibdG0pMyrK7s/wVfTudqsPGa g==; X-IronPort-AV: E=McAfee;i="6600,9927,10961"; a="7995498" X-IronPort-AV: E=Sophos;i="6.05,212,1701158400"; d="scan'208";a="7995498" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jan 2024 14:16:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.05,212,1701158400"; d="scan'208";a="1360484" Received: from boxer.igk.intel.com ([10.102.20.173]) by fmviesa003.fm.intel.com with ESMTP; 22 Jan 2024 14:16:18 -0800 From: Maciej Fijalkowski To: bpf@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: netdev@vger.kernel.org, magnus.karlsson@intel.com, bjorn@kernel.org, maciej.fijalkowski@intel.com, echaudro@redhat.com, lorenzo@kernel.org, martin.lau@linux.dev, tirthendu.sarkar@intel.com, john.fastabend@gmail.com, horms@kernel.org Subject: [PATCH v5 bpf 01/11] xsk: recycle buffer in case Rx queue was full Date: Mon, 22 Jan 2024 23:16:00 +0100 Message-Id: <20240122221610.556746-2-maciej.fijalkowski@intel.com> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240122221610.556746-1-maciej.fijalkowski@intel.com> References: <20240122221610.556746-1-maciej.fijalkowski@intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net Add missing xsk_buff_free() call when __xsk_rcv_zc() failed to produce descriptor to XSK Rx queue. Fixes: 24ea50127ecf ("xsk: support mbuf on ZC RX") Acked-by: Magnus Karlsson Signed-off-by: Maciej Fijalkowski --- net/xdp/xsk.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c index 9f13aa3353e3..1eadfac03cc4 100644 --- a/net/xdp/xsk.c +++ b/net/xdp/xsk.c @@ -167,8 +167,10 @@ static int xsk_rcv_zc(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len) contd = XDP_PKT_CONTD; err = __xsk_rcv_zc(xs, xskb, len, contd); - if (err || likely(!frags)) - goto out; + if (err) + goto err; + if (likely(!frags)) + return 0; xskb_list = &xskb->pool->xskb_list; list_for_each_entry_safe(pos, tmp, xskb_list, xskb_list_node) { @@ -177,11 +179,13 @@ static int xsk_rcv_zc(struct xdp_sock *xs, struct xdp_buff *xdp, u32 len) len = pos->xdp.data_end - pos->xdp.data; err = __xsk_rcv_zc(xs, pos, len, contd); if (err) - return err; + goto err; list_del(&pos->xskb_list_node); } -out: + return 0; +err: + xsk_buff_free(xdp); return err; }