From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from DUZPR83CU001.outbound.protection.outlook.com (mail-northeuropeazon11012008.outbound.protection.outlook.com [52.101.66.8]) (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 3BEFA2472A2; Mon, 24 Aug 2026 00:56:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=52.101.66.8 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787533012; cv=fail; b=P+EvFRY+7oLAJga+9wPvmdOLaUXR+amB2V36KVmOPONa9EJD94nFn0Cdrh6DbQOpQW/gqIL4AyeYh4SP8QCHfCfQDbkSDYMIms7vvb5Wc23skC5syzlvKZ6fXaSkgikWKiZKd343SObJ96MJ6lrMxe7SMidKqZxv5oSEHUYJSpE= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787533012; c=relaxed/simple; bh=iIbw+dJKI73WTELEbm5qE3DIHky5/7T8fMnkaT4huz8=; h=From:Date:Subject:Content-Type:Message-Id:References:In-Reply-To: To:Cc:MIME-Version; b=NJkHcisDuTGr17Rt2ZXFrT6P3PIz4RwORG7a7NvqW4bu+YPE8dvIxiYt/UdQRTw4uFgKUvEkc+Y3O2T2pj0x25oI3+myT0SpUPUO+NrKOQm5eBhv6QHjUc3traPfyH+t6Uz6o5q3k+VcDtTJIZjCR07GdomUjRz0JsJd5TkUpR4= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=est.tech; spf=pass smtp.mailfrom=est.tech; dkim=pass (2048-bit key) header.d=est.tech header.i=@est.tech header.b=nA/3jneW; arc=fail smtp.client-ip=52.101.66.8 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=est.tech Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=est.tech Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=est.tech header.i=@est.tech header.b="nA/3jneW" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=QZpoSl0M4G6sOYdszD0bxOP9Nu/x15hjenrq6qURF/f4JE2AVHD86Z8rphPigAqIrE/0oeatdRKCmVw3QZFbTiTLNqloG9brM+vNOXLm/+LdBZaqW2X9wRXgxFsCDqxhGI3+VnwEvtNnrn2LrFDNNhcm06zag9CNMlR15mmq7t1oF6q02sS3DMZxG7shyguFxkYU40o82ItfUF2fQlVhoFcQwmYHoOrhAIxiPEV1DVUsvVSsJ2k/Mk4QVx7h0tcXLtCgDD5jVgvDDzkixK7lDedLA8BQWB/Kr3tB1xfclIXHqlg1AyFiC8fd4SazligVjzS0hWDVtlUcKiL16gI4wA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=iLZVKvCyxss/qo9XBVIZWXFEuXX7L3s+sr0nlM2QJIc=; b=yTjGs/EsWyIXC4dgPZW9jvxKYz8P+arp4hzYssxy3gu7brLmOr2ozpCOldSHB58bri9LF9mtx4foFPRXUSuUKh9xOGHvYd28rP8paYKQB6rgM5K0gE/1w5IBZ5e4JILeT7fm/0fYzWJXeuq7eYNySjMJLO7QCFI7RGWwuFrtCAsOHlTtLEwXQBFqVHo8wLXZ8/tgonkX0XJNbGNwCapOjDjzn6KUKX/k+avnuDJKKLstPRU4Sj/FKwUeMHraMR2MUKPNgHb1gQk9hrVrA9Ybo8lBY9VM7OvezjPQMcUaTLOjX4fKjqdkyV/ESGuZWK1HResfsv/sL7EHfYYE0Sup9g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=est.tech; dmarc=pass action=none header.from=est.tech; dkim=pass header.d=est.tech; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=est.tech; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=iLZVKvCyxss/qo9XBVIZWXFEuXX7L3s+sr0nlM2QJIc=; b=nA/3jneWdlZ+lGw78yld95iAijsl5qASaQc08uWxcdyICtGK8Ok6fHNXDOiVBy4fQhoesLbEeUOndRQR/jhHIipk6fQBwNMFVIkzRtAqsAPr2uo93/zQcAxm3Oo4+/DJ+nBcKUlaeaIep62vZNeJn6DHAQRZfciL0U8Rm4p6C84jmlebiiUhiIHyU7ZHVDj9p4B3XbEGD7Qhc97KLksjvxawvY7jcKJlHPIy5qwq8cy/VGYBqStALDfmnUJLR5xhFqcWm1bgSNQIEqzWN0fECZiA/IXL+x7ezhYk4ED4jWARglqoxlUFL4l7vd/BERGRjk726HYI2G9+axuBAYPUNg== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=est.tech; Received: from AS8P189MB1752.EURP189.PROD.OUTLOOK.COM (2603:10a6:20b:39b::19) by GV4P189MB3726.EURP189.PROD.OUTLOOK.COM (2603:10a6:150:2b6::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.360.5; Mon, 24 Aug 2026 00:56:45 +0000 Received: from AS8P189MB1752.EURP189.PROD.OUTLOOK.COM ([fe80::69fc:c4d4:200b:e4b4]) by AS8P189MB1752.EURP189.PROD.OUTLOOK.COM ([fe80::69fc:c4d4:200b:e4b4%6]) with mapi id 15.21.0360.005; Mon, 24 Aug 2026 00:56:45 +0000 From: Yunseong Kim Date: Mon, 24 Aug 2026 02:56:28 +0200 Subject: [PATCH 1/4] ksmbd: advertise SMB2_GLOBAL_CAP_PERSISTENT_HANDLES Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260824-b4-ca-v1-1-79d6ae0ad2c3@est.tech> References: <20260824-b4-ca-v1-0-79d6ae0ad2c3@est.tech> In-Reply-To: <20260824-b4-ca-v1-0-79d6ae0ad2c3@est.tech> To: Namjae Jeon , Sergey Senozhatsky , Tom Talpey , ChenXiaoSong Cc: linux-cifs@vger.kernel.org, linux-kernel@vger.kernel.org, Yunseong Kim , ysk@kzalloc.com X-Mailer: b4 0.17-dev X-Developer-Signature: v=1; a=ed25519-sha256; t=1787533000; l=1697; i=yunseong.kim@est.tech; s=20260824; h=from:subject:message-id; bh=iIbw+dJKI73WTELEbm5qE3DIHky5/7T8fMnkaT4huz8=; b=PSET1wIzs/QU3LLyVDePbohCZS2Mo5wm/HT11U8SPqjPnHNwz+RVd/r6znaNDI/DyRZDHPlsu /MVWNX9/b5EBBkY4mUXWfg3WdKX2uN4Fy6iIjKQgxVi0P65+zpL5heK X-Developer-Key: i=yunseong.kim@est.tech; a=ed25519; pk=nfdmjNawkxBHo9UNdzLNBEht8sYmXp0MYUsa/hwC7vw= X-ClientProxiedBy: GVX0EPF0005F718.SWEP280.PROD.OUTLOOK.COM (2603:10a6:158:400::39b) To AS8P189MB1752.EURP189.PROD.OUTLOOK.COM (2603:10a6:20b:39b::19) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8P189MB1752:EE_|GV4P189MB3726:EE_ X-MS-Office365-Filtering-Correlation-Id: 0aa5b206-7114-492a-f05d-08df017a91fb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|10070799003|23010399003|10067099003|11063799006|56012099006|6133799003|18002099003|22082099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AS8P189MB1752.EURP189.PROD.OUTLOOK.COM;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(10070799003)(23010399003)(10067099003)(11063799006)(56012099006)(6133799003)(18002099003)(22082099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 2 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?R3MyaVNDNURzbjQxMWVSNWtiMTZwQ2o1dWcxaGVKLzJWaFJHeFM2YUNvTUlK?= =?utf-8?B?czlhSTNYOEY2QzJUanhOMFZtMjFvUTBRMTVqeklpT3R1NXFIT0dWNFY0TkNu?= =?utf-8?B?VVhENERJam82M3lqdDZnZlIrWTd5N0NGamVOKzJmWVBHU3R4YVZXaFcvak13?= =?utf-8?B?dmVqSktCUVFOOURLd2RTYkZyZUVLWmVQSW1zejRDd1RhbzJFeHZVVmJQMkZO?= =?utf-8?B?Q05uOWVGSGswd2pZNWdLS29YWWltazJJaW45a2MxZkxQNlJDcVI1VVlQWkI4?= =?utf-8?B?czNJKzBLeEZldDU2c2t1eVhKZTFHc1hGNkNrNEduZVBOa1JDejJtcmxUV0tW?= =?utf-8?B?Ymw4UlZJTkZYRW1zdmxZeXdrUDFyQmdpUmdSU1pBT1AyaWdqVE9GUE04QWcx?= =?utf-8?B?L1g1UmVFa1pLd0NXYzc4TlhXaUJEUkl2UlRIamxlbVRSNkVJdzRiZzlENG9P?= =?utf-8?B?c2tZU3p0UE9obWhaOG90enU2NWEwV2dCS3YveFVkUzRmUUZIWDFZb2RqUG5n?= =?utf-8?B?b0MvWWNnNUZ3SGpHSm51NVY0SEp1Z3hqRmRwRW5zWXpuY3M3ZTZhWUwzVldn?= =?utf-8?B?akk0Smx0K00vay91amE5Wlhtemc1VGU2UFpOWmFFWWRDei9zejFDNzJ1bWlF?= =?utf-8?B?bk9HTklGMFd2QlRkRDdCRlorNE5jMHFhM01HTWNVZWtJQXQ4K2xmNkRIZ2N3?= =?utf-8?B?VDRXSWQ1SHBmeGgzL2ovWS9QOFhiRDRWb0tqb0hEcFdMdWxON1JQb001TnFi?= =?utf-8?B?Z3JJczY0N1IzWXEwbzBiQ3VHeFh0RGEwRnRLTlRxbzlBWW1aT3lGSGQyenI4?= =?utf-8?B?U0ZSME12K1pVM2ppZnJtSVRhNFBlRjRuR1Qwdm51TlJVZ1lwc0xhWVpzWkNx?= =?utf-8?B?Z2tIbk9PTXpMV3dCelA2a2syMnBpZTdZQU9ERzRTUit0Mld4b1Nzc1Z5SHNP?= =?utf-8?B?REg2U0oyM1FOSjZwUjZGenFNVlUzQnlGYXI0emR5d2p3UnJ6aEtob1ovTnpa?= =?utf-8?B?am1ESEFQT3VwMEx5WEVjZlM3T0hmUmNrYXJSY1JCbjZyaUN5RkYxVzFNR1U4?= =?utf-8?B?SGw0MlBkVllGY2JPZUdHVlh6WGtIbGxJRnQyMjhOWXZheHFVaWRUYkdzK0Ux?= =?utf-8?B?dDVJV0lvQ1cvRE43VUhKMW9LMHoreElOSGcwalBsMktaeGtHaEJ2VmFTeWx6?= =?utf-8?B?elExdDlEY3lCNTk4anhsMHQvVXVLYS84Qlduelp6TWQ0NFZGSThtTHdWWHIy?= =?utf-8?B?TWpvVGJzZlN5UkpDc09nR096MEV5RGExblRQbEJZcHVZSkt3UWo3NllLWHFj?= =?utf-8?B?akdua0VHc0U2NzFva0R0dVo5dmhlSUxjZGdibEtNMm0xNHZtS0VNNm5nUGJU?= =?utf-8?B?T1BROUhBOXEwYm5Xbnp6bmMycUxRQ3BudDQ2bTVwY0hkZzBaa1RPS1dkd1lZ?= =?utf-8?B?YkE3RlB1TzVaS0RzVnNacmpubXExMURPNG9DVHJCV0Q0YTMzcjh1dUNwall5?= =?utf-8?B?d3dDTFkvcEVTRnBwSDdEN3VBdjFrUmRGYkRCWEVIZVpXRVdpYzFlNUZLdXRm?= =?utf-8?B?V1RnL21XUm0wNjBpbTFrTnNiMDJWbW1OWnNVTFV6cFZmVFZYUTVzNFBYcURO?= =?utf-8?B?WWpsc2xQVkxtRzRUbW9HU1lBUkROS2tOSFpuL0RFZlQyclNjb0VJYUtZWVBr?= =?utf-8?B?SHplbHl3cVExdzg5N3NwWDZ1eUkzMzFNSmVUZ1JHUDkxNUk3U3VnalNsUnA2?= =?utf-8?B?cERGbzA3MEJrNmJRUDVVeTRKYlVJSlZUYndhcmRnTTNPUUxIMjFkSTF3akVz?= =?utf-8?B?NEZiY1h2aU85MGZLVDkya1J4a2ZuSlNWM3FueDlpRGt0bHdLUEsycUxFWXYv?= =?utf-8?B?ZlJLanJNY3JMVzk1MjZ5QjcrWnFZL05HR2lyNGZzRFNlSkxZNk53U05HZENn?= =?utf-8?B?Zm5Zdi8xeTVVcXhPWURicjZ4Y1ZOUW9oZ05xZXFZdXllU09HNnhvSUVJMUJE?= =?utf-8?B?S3JGQ0VodklkZmowc2pyTzZOZm1pRS9OeVJnU1dpL2dwVG81SVMyMzM0YnN5?= =?utf-8?B?Tnk3dWpCY1hDWUxHZTBRYVNJc1lJemFnamE2RUpwamhJK2hHNzNFSVE3T2ZD?= =?utf-8?B?bTEwS0ZrK3JyTnI5ay9oc05zOVRsczB0V0IycGgvVDNSRGxmNFRyeTdwN0Zh?= =?utf-8?B?cVYvYVdDdzV0enhDbEQ3QkQ2SEtUTTBZbXFDZUZtUmF3OVR4blhqYXQ3aXJW?= =?utf-8?B?aGgyMyt2emUzQTF3K25RNGVkRk1zekY2ZDkwaHRDc01CWnB3Q0tSUUNYcjVP?= =?utf-8?B?L2N6aU16TXJEaWh5MjFNNkRseVhvOHlZWFUvUVlRYWJNeFZ5Y1p3Wnk1bEFw?= =?utf-8?Q?cng/yod+qsRD07D7CTDomTactLRt/wkjHBTmB+jDYbBtw?= X-MS-Exchange-AntiSpam-MessageData-1: nH/gwWir1cAH8g== X-OriginatorOrg: est.tech X-MS-Exchange-CrossTenant-Network-Message-Id: 0aa5b206-7114-492a-f05d-08df017a91fb X-MS-Exchange-CrossTenant-AuthSource: AS8P189MB1752.EURP189.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Aug 2026 00:56:45.8845 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: d2585e63-66b9-44b6-a76e-4f4b217d97fd X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Chow/r+qiCo9Yk3NHuVebp2BxhGiwDKeF9mb0v/tT/FReWZ0sI0uI9QfmAIXPn1Cxm5xqL97e9vWHCmoG7PdIA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: GV4P189MB3726 Advertise SMB2_GLOBAL_CAP_PERSISTENT_HANDLES in the SMB2 negotiate response when durable handles are enabled globally. This tells clients that the server supports persistent handles, which is a prerequisite for Continuously Available (CA) share functionality. The capability is gated by KSMBD_GLOBAL_FLAG_DURABLE_HANDLE (controlled by 'durable handles = yes' in ksmbd.conf) so administrators must explicitly enable it. Signed-off-by: Yunseong Kim --- fs/smb/server/smb2ops.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/smb/server/smb2ops.c b/fs/smb/server/smb2ops.c index 4578291fb172..414153fa2a68 100644 --- a/fs/smb/server/smb2ops.c +++ b/fs/smb/server/smb2ops.c @@ -270,10 +270,8 @@ void init_smb3_02_server(struct ksmbd_conn *conn) if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL; - /* - * Durable handles are in-memory only. Do not advertise persistent - * handles until CA recovery and fencing are implemented. - */ + if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_PERSISTENT_HANDLES; } /** @@ -296,7 +294,9 @@ int init_smb3_11_server(struct ksmbd_conn *conn) if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_MULTI_CHANNEL; - /* See init_smb3_02_server(): persistent handles require CA recovery. */ + if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE) + conn->vals->req_capabilities |= SMB2_GLOBAL_CAP_PERSISTENT_HANDLES; + return 0; } -- 2.47.3