From nobody Mon Nov 25 15:01:57 2024 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (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 1454F178CF6; Sat, 26 Oct 2024 03:57:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.187 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729915073; cv=none; b=gSoONY0uzIKgVz3wsqmWsyQv80AMjP91OF1esbzqsNad7CSn4IpAil9SBKo3hpa5BxeFNbWvx/V7oe1vjU+yC1iq/w3dVXwHEk6nEcemYpdA3RlPOy37a7IlFjWcHkxxVYJNtzc5h4i43jSj+I1C23cZEqFZwNOdq5+yTBsbDt8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729915073; c=relaxed/simple; bh=HEdK7Cl/NMR0ubFOMazAruj8y/1j7/+ZqT5IBWle8NI=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=MM8LwBohlOnjdJ7aWPLJhD1T67Td3+kt23BBdYMXobmUQloJhS1ZD9y1cd2l/jMkSuiqzcayO1T2kSfjLrNK0reqJg+5+tFanBSXkBk9M1yYl2qdEYD4tpQQqFFf/4kZ/zk8YFuK/+NZFyzZx3SzD6MFERNuOlqpiD8TZf1gu9o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.187 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.105]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Xb5RX3P6kzyTjN; Sat, 26 Oct 2024 11:56:08 +0800 (CST) Received: from dggpemf500002.china.huawei.com (unknown [7.185.36.57]) by mail.maildlp.com (Postfix) with ESMTPS id E7FF6140258; Sat, 26 Oct 2024 11:57:42 +0800 (CST) Received: from huawei.com (10.175.101.6) by dggpemf500002.china.huawei.com (7.185.36.57) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Sat, 26 Oct 2024 11:57:41 +0800 From: Yue Haibing To: , , , , , , , , , , , , , , , , , CC: , , , , Subject: [PATCH v4 net-next 1/4] igc: Fix passing 0 to ERR_PTR in igc_xdp_run_prog() Date: Sat, 26 Oct 2024 12:12:46 +0800 Message-ID: <20241026041249.1267664-2-yuehaibing@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241026041249.1267664-1-yuehaibing@huawei.com> References: <20241026041249.1267664-1-yuehaibing@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To dggpemf500002.china.huawei.com (7.185.36.57) Content-Type: text/plain; charset="utf-8" igc_xdp_run_prog() converts customed xdp action to a negative error code with the sk_buff pointer type which be checked with IS_ERR in igc_clean_rx_irq(). Remove this error pointer handing instead use plain int return value to fix this smatch warnings: drivers/net/ethernet/intel/igc/igc_main.c:2533 igc_xdp_run_prog() warn: passing zero to 'ERR_PTR' Fixes: 26575105d6ed ("igc: Add initial XDP support") Reviewed-by: Maciej Fijalkowski Reviewed-by: Jacob Keller Signed-off-by: Yue Haibing Reviewed-by: Simon Horman Tested-by: Avigail Dahan --- drivers/net/ethernet/intel/igc/igc_main.c | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethern= et/intel/igc/igc_main.c index 6e70bca15db1..5e44c2546a12 100644 --- a/drivers/net/ethernet/intel/igc/igc_main.c +++ b/drivers/net/ethernet/intel/igc/igc_main.c @@ -2123,10 +2123,6 @@ static bool igc_cleanup_headers(struct igc_ring *rx_= ring, union igc_adv_rx_desc *rx_desc, struct sk_buff *skb) { - /* XDP packets use error pointer so abort at this point */ - if (IS_ERR(skb)) - return true; - if (unlikely(igc_test_staterr(rx_desc, IGC_RXDEXT_STATERR_RXE))) { struct net_device *netdev =3D rx_ring->netdev; =20 @@ -2515,8 +2511,7 @@ static int __igc_xdp_run_prog(struct igc_adapter *ada= pter, } } =20 -static struct sk_buff *igc_xdp_run_prog(struct igc_adapter *adapter, - struct xdp_buff *xdp) +static int igc_xdp_run_prog(struct igc_adapter *adapter, struct xdp_buff *= xdp) { struct bpf_prog *prog; int res; @@ -2530,7 +2525,7 @@ static struct sk_buff *igc_xdp_run_prog(struct igc_ad= apter *adapter, res =3D __igc_xdp_run_prog(adapter, prog, xdp); =20 out: - return ERR_PTR(-res); + return res; } =20 /* This function assumes __netif_tx_lock is held by the caller. */ @@ -2585,6 +2580,7 @@ static int igc_clean_rx_irq(struct igc_q_vector *q_ve= ctor, const int budget) struct sk_buff *skb =3D rx_ring->skb; u16 cleaned_count =3D igc_desc_unused(rx_ring); int xdp_status =3D 0, rx_buffer_pgcnt; + int xdp_res =3D 0; =20 while (likely(total_packets < budget)) { struct igc_xdp_buff ctx =3D { .rx_ts =3D NULL }; @@ -2630,12 +2626,10 @@ static int igc_clean_rx_irq(struct igc_q_vector *q_= vector, const int budget) xdp_buff_clear_frags_flag(&ctx.xdp); ctx.rx_desc =3D rx_desc; =20 - skb =3D igc_xdp_run_prog(adapter, &ctx.xdp); + xdp_res =3D igc_xdp_run_prog(adapter, &ctx.xdp); } =20 - if (IS_ERR(skb)) { - unsigned int xdp_res =3D -PTR_ERR(skb); - + if (xdp_res) { switch (xdp_res) { case IGC_XDP_CONSUMED: rx_buffer->pagecnt_bias++; @@ -2657,7 +2651,7 @@ static int igc_clean_rx_irq(struct igc_q_vector *q_ve= ctor, const int budget) skb =3D igc_construct_skb(rx_ring, rx_buffer, &ctx); =20 /* exit if we failed to retrieve a buffer */ - if (!skb) { + if (!xdp_res && !skb) { rx_ring->rx_stats.alloc_failed++; rx_buffer->pagecnt_bias++; set_bit(IGC_RING_FLAG_RX_ALLOC_FAILED, &rx_ring->flags); @@ -2672,7 +2666,7 @@ static int igc_clean_rx_irq(struct igc_q_vector *q_ve= ctor, const int budget) continue; =20 /* verify the packet layout is correct */ - if (igc_cleanup_headers(rx_ring, rx_desc, skb)) { + if (xdp_res || igc_cleanup_headers(rx_ring, rx_desc, skb)) { skb =3D NULL; continue; } --=20 2.34.1 From nobody Mon Nov 25 15:01:57 2024 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) (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 C5E4817965E; 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charset="utf-8" igb_run_xdp() converts customed xdp action to a negative error code with the sk_buff pointer type which be checked with IS_ERR in igb_clean_rx_irq(). Remove this error pointer handing instead use plain int return value. Fixes: 9cbc948b5a20 ("igb: add XDP support") Reviewed-by: Maciej Fijalkowski Reviewed-by: Jacob Keller Signed-off-by: Yue Haibing Reviewed-by: Simon Horman Tested-by: Chandan Kumar Rout (A Contingent Worke= r at Intel) --- drivers/net/ethernet/intel/igb/igb_main.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethern= et/intel/igb/igb_main.c index f1d088168723..50c23dfcf304 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -8584,9 +8584,8 @@ static struct sk_buff *igb_build_skb(struct igb_ring = *rx_ring, return skb; } =20 -static struct sk_buff *igb_run_xdp(struct igb_adapter *adapter, - struct igb_ring *rx_ring, - struct xdp_buff *xdp) +static int igb_run_xdp(struct igb_adapter *adapter, struct igb_ring *rx_ri= ng, + struct xdp_buff *xdp) { int err, result =3D IGB_XDP_PASS; struct bpf_prog *xdp_prog; @@ -8626,7 +8625,7 @@ static struct sk_buff *igb_run_xdp(struct igb_adapter= *adapter, break; } xdp_out: - return ERR_PTR(-result); + return result; } =20 static unsigned int igb_rx_frame_truesize(struct igb_ring *rx_ring, @@ -8752,10 +8751,6 @@ static bool igb_cleanup_headers(struct igb_ring *rx_= ring, union e1000_adv_rx_desc *rx_desc, struct sk_buff *skb) { - /* XDP packets use error pointer so abort at this point */ - if (IS_ERR(skb)) - return true; - if (unlikely((igb_test_staterr(rx_desc, E1000_RXDEXT_ERR_FRAME_ERR_MASK)))) { struct net_device *netdev =3D rx_ring->netdev; @@ -8879,6 +8874,7 @@ static int igb_clean_rx_irq(struct igb_q_vector *q_ve= ctor, const int budget) struct xdp_buff xdp; u32 frame_sz =3D 0; int rx_buf_pgcnt; + int xdp_res =3D 0; =20 /* Frame size depend on rx_ring setup when PAGE_SIZE=3D4K */ #if (PAGE_SIZE < 8192) @@ -8936,12 +8932,10 @@ static int igb_clean_rx_irq(struct igb_q_vector *q_= vector, const int budget) /* At larger PAGE_SIZE, frame_sz depend on len size */ xdp.frame_sz =3D igb_rx_frame_truesize(rx_ring, size); #endif - skb =3D igb_run_xdp(adapter, rx_ring, &xdp); + xdp_res =3D igb_run_xdp(adapter, rx_ring, &xdp); } =20 - if (IS_ERR(skb)) { - unsigned int xdp_res =3D -PTR_ERR(skb); - + if (xdp_res) { if (xdp_res & (IGB_XDP_TX | IGB_XDP_REDIR)) { xdp_xmit |=3D xdp_res; igb_rx_buffer_flip(rx_ring, rx_buffer, size); @@ -8960,7 +8954,7 @@ static int igb_clean_rx_irq(struct igb_q_vector *q_ve= ctor, const int budget) &xdp, timestamp); =20 /* exit if we failed to retrieve a buffer */ - if (!skb) { + if (!xdp_res && !skb) { rx_ring->rx_stats.alloc_failed++; rx_buffer->pagecnt_bias++; break; @@ -8974,7 +8968,7 @@ static int igb_clean_rx_irq(struct igb_q_vector *q_ve= ctor, const int budget) continue; =20 /* verify the packet layout is correct */ - if (igb_cleanup_headers(rx_ring, rx_desc, skb)) { + if (xdp_res || igb_cleanup_headers(rx_ring, rx_desc, skb)) { skb =3D NULL; continue; } --=20 2.34.1 From nobody Mon Nov 25 15:01:57 2024 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 EC04715C147; 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charset="utf-8" ixgbe_run_xdp() converts customed xdp action to a negative error code with the sk_buff pointer type which be checked with IS_ERR in ixgbe_clean_rx_irq(). Remove this error pointer handing instead use plain int return value. Fixes: 924708081629 ("ixgbe: add XDP support for pass and drop actions") Reviewed-by: Jacob Keller Reviewed-by: Maciej Fijalkowski Signed-off-by: Yue Haibing Reviewed-by: Simon Horman Tested-by: Chandan Kumar Rout (A Contingent Worke= r at Intel) --- drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 23 ++++++++----------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/et= hernet/intel/ixgbe/ixgbe_main.c index 8b8404d8c946..78bf97ab0524 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c @@ -1908,10 +1908,6 @@ bool ixgbe_cleanup_headers(struct ixgbe_ring *rx_rin= g, { struct net_device *netdev =3D rx_ring->netdev; =20 - /* XDP packets use error pointer so abort at this point */ - if (IS_ERR(skb)) - return true; - /* Verify netdev is present, and that packet does not have any * errors that would be unacceptable to the netdev. */ @@ -2219,9 +2215,9 @@ static struct sk_buff *ixgbe_build_skb(struct ixgbe_r= ing *rx_ring, return skb; } =20 -static struct sk_buff *ixgbe_run_xdp(struct ixgbe_adapter *adapter, - struct ixgbe_ring *rx_ring, - struct xdp_buff *xdp) +static int ixgbe_run_xdp(struct ixgbe_adapter *adapter, + struct ixgbe_ring *rx_ring, + struct xdp_buff *xdp) { int err, result =3D IXGBE_XDP_PASS; struct bpf_prog *xdp_prog; @@ -2271,7 +2267,7 @@ static struct sk_buff *ixgbe_run_xdp(struct ixgbe_ada= pter *adapter, break; } xdp_out: - return ERR_PTR(-result); + return result; } =20 static unsigned int ixgbe_rx_frame_truesize(struct ixgbe_ring *rx_ring, @@ -2329,6 +2325,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *= q_vector, unsigned int offset =3D rx_ring->rx_offset; unsigned int xdp_xmit =3D 0; struct xdp_buff xdp; + int xdp_res =3D 0; =20 /* Frame size depend on rx_ring setup when PAGE_SIZE=3D4K */ #if (PAGE_SIZE < 8192) @@ -2374,12 +2371,10 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector= *q_vector, /* At larger PAGE_SIZE, frame_sz depend on len size */ xdp.frame_sz =3D ixgbe_rx_frame_truesize(rx_ring, size); #endif - skb =3D ixgbe_run_xdp(adapter, rx_ring, &xdp); + xdp_res =3D ixgbe_run_xdp(adapter, rx_ring, &xdp); } =20 - if (IS_ERR(skb)) { - unsigned int xdp_res =3D -PTR_ERR(skb); - + if (xdp_res) { if (xdp_res & (IXGBE_XDP_TX | IXGBE_XDP_REDIR)) { xdp_xmit |=3D xdp_res; ixgbe_rx_buffer_flip(rx_ring, rx_buffer, size); @@ -2399,7 +2394,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *= q_vector, } =20 /* exit if we failed to retrieve a buffer */ - if (!skb) { + if (!xdp_res && !skb) { rx_ring->rx_stats.alloc_rx_buff_failed++; rx_buffer->pagecnt_bias++; break; @@ -2413,7 +2408,7 @@ static int ixgbe_clean_rx_irq(struct ixgbe_q_vector *= q_vector, continue; =20 /* verify the packet layout is correct */ - if (ixgbe_cleanup_headers(rx_ring, rx_desc, skb)) + if (xdp_res || ixgbe_cleanup_headers(rx_ring, rx_desc, skb)) continue; =20 /* probably a little skewed due to removing CRC */ --=20 2.34.1 From nobody Mon Nov 25 15:01:57 2024 Received: from szxga02-in.huawei.com (szxga02-in.huawei.com [45.249.212.188]) (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 294341DFD8; 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charset="utf-8" ixgbevf_run_xdp() converts customed xdp action to a negative error code with the sk_buff pointer type which be checked with IS_ERR in ixgbevf_clean_rx_irq(). Remove this error pointer handing instead use plain int return value. Fixes: c7aec59657b6 ("ixgbevf: Add XDP support for pass and drop actions") Reviewed-by: Jacob Keller Reviewed-by: Maciej Fijalkowski Signed-off-by: Yue Haibing Reviewed-by: Simon Horman Tested-by: Chandan Kumar Rout (A Contingent Worke= r at Intel) --- .../net/ethernet/intel/ixgbevf/ixgbevf_main.c | 23 ++++++++----------- 1 file changed, 10 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/ne= t/ethernet/intel/ixgbevf/ixgbevf_main.c index 149911e3002a..183d2305d058 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -732,10 +732,6 @@ static bool ixgbevf_cleanup_headers(struct ixgbevf_rin= g *rx_ring, union ixgbe_adv_rx_desc *rx_desc, struct sk_buff *skb) { - /* XDP packets use error pointer so abort at this point */ - if (IS_ERR(skb)) - return true; - /* verify that the packet does not have any known errors */ if (unlikely(ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) { @@ -1044,9 +1040,9 @@ static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring = *ring, return IXGBEVF_XDP_TX; } =20 -static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter, - struct ixgbevf_ring *rx_ring, - struct xdp_buff *xdp) +static int ixgbevf_run_xdp(struct ixgbevf_adapter *adapter, + struct ixgbevf_ring *rx_ring, + struct xdp_buff *xdp) { int result =3D IXGBEVF_XDP_PASS; struct ixgbevf_ring *xdp_ring; @@ -1080,7 +1076,7 @@ static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf= _adapter *adapter, break; } xdp_out: - return ERR_PTR(-result); + return result; } =20 static unsigned int ixgbevf_rx_frame_truesize(struct ixgbevf_ring *rx_ring, @@ -1122,6 +1118,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vect= or *q_vector, struct sk_buff *skb =3D rx_ring->skb; bool xdp_xmit =3D false; struct xdp_buff xdp; + int xdp_res =3D 0; =20 /* Frame size depend on rx_ring setup when PAGE_SIZE=3D4K */ #if (PAGE_SIZE < 8192) @@ -1165,11 +1162,11 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_ve= ctor *q_vector, /* At larger PAGE_SIZE, frame_sz depend on len size */ xdp.frame_sz =3D ixgbevf_rx_frame_truesize(rx_ring, size); #endif - skb =3D ixgbevf_run_xdp(adapter, rx_ring, &xdp); + xdp_res =3D ixgbevf_run_xdp(adapter, rx_ring, &xdp); } =20 - if (IS_ERR(skb)) { - if (PTR_ERR(skb) =3D=3D -IXGBEVF_XDP_TX) { + if (xdp_res) { + if (xdp_res =3D=3D IXGBEVF_XDP_TX) { xdp_xmit =3D true; ixgbevf_rx_buffer_flip(rx_ring, rx_buffer, size); @@ -1189,7 +1186,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vect= or *q_vector, } =20 /* exit if we failed to retrieve a buffer */ - if (!skb) { + if (!xdp_res && !skb) { rx_ring->rx_stats.alloc_rx_buff_failed++; rx_buffer->pagecnt_bias++; break; @@ -1203,7 +1200,7 @@ static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vect= or *q_vector, continue; =20 /* verify the packet layout is correct */ - if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) { + if (xdp_res || ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) { skb =3D NULL; continue; } --=20 2.34.1