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Miller" , Jakub Kicinski CC: , , , References: <20200819092436.58232-1-lmb@cloudflare.com> <20200819092436.58232-6-lmb@cloudflare.com> From: Yonghong Song Message-ID: <903adddc-1615-f5cd-ab56-c7c1e2994480@fb.com> Date: Wed, 19 Aug 2020 13:35:22 -0700 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 In-Reply-To: <20200819092436.58232-6-lmb@cloudflare.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BL0PR02CA0111.namprd02.prod.outlook.com (2603:10b6:208:35::16) To BYAPR15MB4088.namprd15.prod.outlook.com (2603:10b6:a02:c3::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2620:10d:c0a8:11e8::10d3] (2620:10d:c091:480::1:d29f) by BL0PR02CA0111.namprd02.prod.outlook.com (2603:10b6:208:35::16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3305.24 via Frontend Transport; Wed, 19 Aug 2020 20:35:25 +0000 X-Originating-IP: [2620:10d:c091:480::1:d29f] X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c38aab23-62a0-4b56-e44a-08d8447f683c X-MS-TrafficTypeDiagnostic: BYAPR15MB2693: X-Microsoft-Antispam-PRVS: X-FB-Source: Internal X-MS-Oob-TLC-OOBClassifiers: OLM:3513; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: URGu+Tj7y9zu24TZfhg5XtGFJqi3N6GG5A4kQU3fHl19uuL09lR059V7MBcQ0KaOP9HudDpl5SlxakQL+7B8lafpV3KN0oQO9PeB1PJBWOAJBNU3SuQzGsbgBX1SEtrmplOZ2U2VV0gC+t/ILywRMcRL/OOK2U6pgRR3LxmHcezjDXBzx7uW7/0VfYVvrUMoMDmFeGksqtlLVeqioqa9UMMmMRCZwLOqsteohz582ZQBsAi6R8ZVCAFCnXEhEMyRH8R3hyUKUi6HaPjWZejjcT00wYF61P/A100gnSo01+Bgw94uSLDtL454qGU0aVaMo1P9fZvt3e5aOGektHxrLi55iIahoT6l4Z61OmKW8w4s6bGmTn1xSTSvyJMv/Uhw X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BYAPR15MB4088.namprd15.prod.outlook.com;PTR:;CAT:NONE;SFS:(396003)(39860400002)(136003)(346002)(376002)(366004)(53546011)(52116002)(66946007)(478600001)(186003)(2906002)(66476007)(110136005)(6486002)(5660300002)(4744005)(86362001)(16526019)(66556008)(31696002)(316002)(4326008)(7416002)(6666004)(31686004)(2616005)(8936002)(36756003)(8676002)(83380400001)(43740500002);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 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 X-MS-Exchange-CrossTenant-Network-Message-Id: c38aab23-62a0-4b56-e44a-08d8447f683c X-MS-Exchange-CrossTenant-AuthSource: BYAPR15MB4088.namprd15.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Aug 2020 20:35:27.5330 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 9FLUH61p/lQ8wvtuF1+2W6bRd3Pn+/lPCz8UQl8DhykDsUXyHjUIgtA5YjRMUC+h X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR15MB2693 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-19_13:2020-08-19,2020-08-19 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxlogscore=999 impostorscore=0 mlxscore=0 bulkscore=0 suspectscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 clxscore=1015 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008190168 X-FB-Internal: deliver Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/19/20 2:24 AM, Lorenz Bauer wrote: > Allow calling bpf_map_update_elem on sockmap and sockhash from a BPF > context. The synchronization required for this is a bit fiddly: we > need to prevent the socket from changing it's state while we add it > to the sockmap, since we rely on getting a callback via > sk_prot->unhash. However, we can't just lock_sock like in > sock_map_sk_acquire because that might sleep. So instead we disable > softirq processing and use bh_lock_sock to prevent further > modification. > > Signed-off-by: Lorenz Bauer Acked-by: Yonghong Song