From patchwork Wed Oct 30 16:51:48 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 13856872 X-Patchwork-Delegate: kuba@kernel.org Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 9C54621859E; Wed, 30 Oct 2024 16:53:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730307233; cv=none; b=BWvtGbRSgztx4srQkEag2aKmwz+XghPT+pq3IgeqMdL2MHVhepLKAW2ZCNcsA6Op6HZccAev25ZfvEb19eqnonX6+40+K6Pyw1ngxJX6CVbNKpBJzCMjkwpcANvIPpr6rg8o2Pj85lJTLfX/sl974OYlKBrj7sBV2IGlW7z0RQ4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730307233; c=relaxed/simple; bh=GOMtbJbKY3crjKKnTTBLUaByNPYde/SqH7cYq8ceHng=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RtOh1y67zcUQLIdlpAoadxQAw09RqDfkN4xlvA8heH24/O0sLLMLDtysunug5SnLOm8qgsrkpYbrf5GvvXdGTA1SWp6EwrWA1t3iFHZQ1dd63MYJ0rDGA0aROgqcLLjqnwEO64QV4n0n1RgVCbfkj6DmIMm5cniE08kkGTzZxZ4= 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=mRCtA8Sd; arc=none smtp.client-ip=192.198.163.10 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="mRCtA8Sd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730307231; x=1761843231; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GOMtbJbKY3crjKKnTTBLUaByNPYde/SqH7cYq8ceHng=; b=mRCtA8Sd3F4rXrSeUl08+vvmnpsXWso4QNRxPGUfGaJ8OuUhRn8jaReZ 1UB20PrHtNNYHTjXOYb71hNCt9RilUlFGP8H8L7As/GOxaR/QwDZaXill 9IIRQadW5zs67bPsh1i8p39pUijS8cDamWbUsQEArZLv4vN8Fc/ZULbRV yJwd/GURgyvh9zV7gXiTVH7O8NdYqEsvuz0a+nikjQ/tdNI4sJYaHazAz OFq7hQYiTw6XbBOPVh769ohqN6Y8PzVyrnL4zKlRvpHkkC34BrVBYRxVR HNvsizJVDPIjalis5zqZzVx8Ft8s4NgB+VmL/BbZ8KQ55+LqbIaotMWl8 Q==; X-CSE-ConnectionGUID: oiQrJ3f6TKOQ9LFPlrMnTw== X-CSE-MsgGUID: lCwJNrd+Tz6zpjwsdua5EA== X-IronPort-AV: E=McAfee;i="6700,10204,11241"; a="41389652" X-IronPort-AV: E=Sophos;i="6.11,245,1725346800"; d="scan'208";a="41389652" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2024 09:53:50 -0700 X-CSE-ConnectionGUID: LsdZrpLMSEyieHK5eTvNVA== X-CSE-MsgGUID: 5f7OGNGjQMmIQ5m/VJxvbw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,245,1725346800"; d="scan'208";a="87524494" Received: from newjersey.igk.intel.com ([10.102.20.203]) by orviesa004.jf.intel.com with ESMTP; 30 Oct 2024 09:53:46 -0700 From: Alexander Lobakin To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Alexander Lobakin , =?utf-8?q?Toke_H=C3=B8?= =?utf-8?q?iland-J=C3=B8rgensen?= , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Maciej Fijalkowski , Stanislav Fomichev , Magnus Karlsson , nex.sw.ncis.osdt.itp.upstreaming@intel.com, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v3 05/18] xdp, xsk: constify read-only arguments of some static inline helpers Date: Wed, 30 Oct 2024 17:51:48 +0100 Message-ID: <20241030165201.442301-6-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241030165201.442301-1-aleksander.lobakin@intel.com> References: <20241030165201.442301-1-aleksander.lobakin@intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Lots of read-only helpers for &xdp_buff and &xdp_frame, such as getting the frame length, skb_shared_info etc., don't have their arguments marked with `const` for no reason. Add the missing annotations to leave less place for mistakes and more for optimization. Signed-off-by: Alexander Lobakin --- include/net/xdp.h | 29 +++++++++++++++++------------ include/net/xdp_sock_drv.h | 11 ++++++----- include/net/xsk_buff_pool.h | 2 +- 3 files changed, 24 insertions(+), 18 deletions(-) diff --git a/include/net/xdp.h b/include/net/xdp.h index e6770dd40c91..197808df1ee1 100644 --- a/include/net/xdp.h +++ b/include/net/xdp.h @@ -88,7 +88,7 @@ struct xdp_buff { u32 flags; /* supported values defined in xdp_buff_flags */ }; -static __always_inline bool xdp_buff_has_frags(struct xdp_buff *xdp) +static __always_inline bool xdp_buff_has_frags(const struct xdp_buff *xdp) { return !!(xdp->flags & XDP_FLAGS_HAS_FRAGS); } @@ -103,7 +103,8 @@ static __always_inline void xdp_buff_clear_frags_flag(struct xdp_buff *xdp) xdp->flags &= ~XDP_FLAGS_HAS_FRAGS; } -static __always_inline bool xdp_buff_is_frag_pfmemalloc(struct xdp_buff *xdp) +static __always_inline bool +xdp_buff_is_frag_pfmemalloc(const struct xdp_buff *xdp) { return !!(xdp->flags & XDP_FLAGS_FRAGS_PF_MEMALLOC); } @@ -144,15 +145,16 @@ xdp_prepare_buff(struct xdp_buff *xdp, unsigned char *hard_start, SKB_DATA_ALIGN(sizeof(struct skb_shared_info))) static inline struct skb_shared_info * -xdp_get_shared_info_from_buff(struct xdp_buff *xdp) +xdp_get_shared_info_from_buff(const struct xdp_buff *xdp) { return (struct skb_shared_info *)xdp_data_hard_end(xdp); } -static __always_inline unsigned int xdp_get_buff_len(struct xdp_buff *xdp) +static __always_inline unsigned int +xdp_get_buff_len(const struct xdp_buff *xdp) { unsigned int len = xdp->data_end - xdp->data; - struct skb_shared_info *sinfo; + const struct skb_shared_info *sinfo; if (likely(!xdp_buff_has_frags(xdp))) goto out; @@ -177,12 +179,13 @@ struct xdp_frame { u32 flags; /* supported values defined in xdp_buff_flags */ }; -static __always_inline bool xdp_frame_has_frags(struct xdp_frame *frame) +static __always_inline bool xdp_frame_has_frags(const struct xdp_frame *frame) { return !!(frame->flags & XDP_FLAGS_HAS_FRAGS); } -static __always_inline bool xdp_frame_is_frag_pfmemalloc(struct xdp_frame *frame) +static __always_inline bool +xdp_frame_is_frag_pfmemalloc(const struct xdp_frame *frame) { return !!(frame->flags & XDP_FLAGS_FRAGS_PF_MEMALLOC); } @@ -201,7 +204,7 @@ static __always_inline void xdp_frame_bulk_init(struct xdp_frame_bulk *bq) } static inline struct skb_shared_info * -xdp_get_shared_info_from_frame(struct xdp_frame *frame) +xdp_get_shared_info_from_frame(const struct xdp_frame *frame) { void *data_hard_start = frame->data - frame->headroom - sizeof(*frame); @@ -249,7 +252,8 @@ int xdp_alloc_skb_bulk(void **skbs, int n_skb, gfp_t gfp); struct xdp_frame *xdpf_clone(struct xdp_frame *xdpf); static inline -void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp) +void xdp_convert_frame_to_buff(const struct xdp_frame *frame, + struct xdp_buff *xdp) { xdp->data_hard_start = frame->data - frame->headroom - sizeof(*frame); xdp->data = frame->data; @@ -260,7 +264,7 @@ void xdp_convert_frame_to_buff(struct xdp_frame *frame, struct xdp_buff *xdp) } static inline -int xdp_update_frame_from_buff(struct xdp_buff *xdp, +int xdp_update_frame_from_buff(const struct xdp_buff *xdp, struct xdp_frame *xdp_frame) { int metasize, headroom; @@ -317,9 +321,10 @@ void xdp_flush_frame_bulk(struct xdp_frame_bulk *bq); void xdp_return_frame_bulk(struct xdp_frame *xdpf, struct xdp_frame_bulk *bq); -static __always_inline unsigned int xdp_get_frame_len(struct xdp_frame *xdpf) +static __always_inline unsigned int +xdp_get_frame_len(const struct xdp_frame *xdpf) { - struct skb_shared_info *sinfo; + const struct skb_shared_info *sinfo; unsigned int len = xdpf->len; if (likely(!xdp_frame_has_frags(xdpf))) diff --git a/include/net/xdp_sock_drv.h b/include/net/xdp_sock_drv.h index 40085afd9160..f3175a5d28f7 100644 --- a/include/net/xdp_sock_drv.h +++ b/include/net/xdp_sock_drv.h @@ -101,7 +101,7 @@ static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool) return xp_alloc(pool); } -static inline bool xsk_is_eop_desc(struct xdp_desc *desc) +static inline bool xsk_is_eop_desc(const struct xdp_desc *desc) { return !xp_mb_desc(desc); } @@ -143,7 +143,7 @@ static inline void xsk_buff_add_frag(struct xdp_buff *xdp) list_add_tail(&frag->list_node, &frag->pool->xskb_list); } -static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first) { struct xdp_buff_xsk *xskb = container_of(first, struct xdp_buff_xsk, xdp); struct xdp_buff *ret = NULL; @@ -200,7 +200,8 @@ static inline void *xsk_buff_raw_get_data(struct xsk_buff_pool *pool, u64 addr) XDP_TXMD_FLAGS_CHECKSUM | \ 0) -static inline bool xsk_buff_valid_tx_metadata(struct xsk_tx_metadata *meta) +static inline bool +xsk_buff_valid_tx_metadata(const struct xsk_tx_metadata *meta) { return !(meta->flags & ~XDP_TXMD_FLAGS_VALID); } @@ -337,7 +338,7 @@ static inline struct xdp_buff *xsk_buff_alloc(struct xsk_buff_pool *pool) return NULL; } -static inline bool xsk_is_eop_desc(struct xdp_desc *desc) +static inline bool xsk_is_eop_desc(const struct xdp_desc *desc) { return false; } @@ -360,7 +361,7 @@ static inline void xsk_buff_add_frag(struct xdp_buff *xdp) { } -static inline struct xdp_buff *xsk_buff_get_frag(struct xdp_buff *first) +static inline struct xdp_buff *xsk_buff_get_frag(const struct xdp_buff *first) { return NULL; } diff --git a/include/net/xsk_buff_pool.h b/include/net/xsk_buff_pool.h index bb03cee716b3..3832997cc605 100644 --- a/include/net/xsk_buff_pool.h +++ b/include/net/xsk_buff_pool.h @@ -183,7 +183,7 @@ static inline bool xp_desc_crosses_non_contig_pg(struct xsk_buff_pool *pool, !(pool->dma_pages[addr >> PAGE_SHIFT] & XSK_NEXT_PG_CONTIG_MASK); } -static inline bool xp_mb_desc(struct xdp_desc *desc) +static inline bool xp_mb_desc(const struct xdp_desc *desc) { return desc->options & XDP_PKT_CONTD; }