From patchwork Tue Oct 8 09:14:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hou Tao X-Patchwork-Id: 13826016 X-Patchwork-Delegate: bpf@iogearbox.net Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (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 E979517CA1A for ; Tue, 8 Oct 2024 09:02:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728378156; cv=none; b=JHvF283h8qKnCUtGL8ifMpcIEtDfdRbm3HHX2G8iPnMTCh9fZzJEoYVxLxarb0JMCfSqYnIISLJ1a89HDaXfwf7OgYV7oBfRHlrKJVWaI4IEREM/t17Q7Buns1y9G2O37DKHN63GpX+uFnT6s+DwDtR0qZlFkiaocGukQ0/aRJI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728378156; c=relaxed/simple; bh=GiWGXqABqnZQtJBtWCg46gM92G0ZYjGxykw4AbcoRS8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XK4glkcJGpPM1KIzxLzh4mcEIuzliztSSylADEwTTo+oAvpPL7kYKrZ3/DmwbWu3j7Yn5oRDFA//2t9/VkLRFlNKZLgiKkL6U+tbYPVV4POWUIg35caosuPjHWqgzUcAbvAsAETB7nONseCWg2LpiuWQABHm6CEC1ij5ncCHRe4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XN9581Lbhz4f3jkq for ; Tue, 8 Oct 2024 17:02:20 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id DFCBB1A08FC for ; Tue, 8 Oct 2024 17:02:31 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.112.60]) by APP4 (Coremail) with SMTP id gCh0CgDH+sYd9QRnbOEHDg--.25681S17; Tue, 08 Oct 2024 17:02:31 +0800 (CST) From: Hou Tao To: bpf@vger.kernel.org Cc: Martin KaFai Lau , Alexei Starovoitov , Andrii Nakryiko , Eduard Zingerman , Song Liu , Hao Luo , Yonghong Song , Daniel Borkmann , KP Singh , Stanislav Fomichev , Jiri Olsa , John Fastabend , houtao1@huawei.com, xukuohai@huawei.com Subject: [PATCH bpf-next 13/16] bpf: Export bpf_dynptr_set_size Date: Tue, 8 Oct 2024 17:14:58 +0800 Message-ID: <20241008091501.8302-14-houtao@huaweicloud.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241008091501.8302-1-houtao@huaweicloud.com> References: <20241008091501.8302-1-houtao@huaweicloud.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgDH+sYd9QRnbOEHDg--.25681S17 X-Coremail-Antispam: 1UD129KBjvJXoW7Aw18Aw1rur1xGryrCrWfKrg_yoW8Gr1UpF ykC347Zr48tFWxXw4UJFs2yw4UKay7Wr17GFy8t34rXwsFvF9xZF1jgry7Kr98t3yDGr43 AFn7KrWFvFy8Z37anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPvb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAV Cq3wA2048vs2IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0 rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267 AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E 14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7 xfMcIj6xIIjxv20xvE14v26r106r15McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Y z7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2 AFwI0_Jw0_GFyl42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAq x4xG67AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r 43MIIYrxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Gr0_Xr1lIxAIcVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14 v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuY vjxUoo7KUUUUU X-CM-SenderInfo: xkrx3t3r6k3tpzhluzxrxghudrp/ X-Patchwork-Delegate: bpf@iogearbox.net From: Hou Tao It will be used by the following patch to shrink the size of dynptr. Signed-off-by: Hou Tao --- include/linux/bpf.h | 1 + kernel/bpf/helpers.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 127952377025..23db20e6402f 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1301,6 +1301,7 @@ enum bpf_dynptr_type { }; int bpf_dynptr_check_size(u32 size); +void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size); u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr); const void *__bpf_dynptr_data(const struct bpf_dynptr_kern *ptr, u32 len); void *__bpf_dynptr_data_rw(const struct bpf_dynptr_kern *ptr, u32 len); diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index f39521b53a4e..f6fd996e30c7 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1674,7 +1674,7 @@ u32 __bpf_dynptr_size(const struct bpf_dynptr_kern *ptr) return ptr->size & DYNPTR_SIZE_MASK; } -static void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size) +void bpf_dynptr_set_size(struct bpf_dynptr_kern *ptr, u32 new_size) { u32 metadata = ptr->size & ~DYNPTR_SIZE_MASK;