From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7861AC64E7A for ; Mon, 23 Nov 2020 00:42:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4785D21741 for ; Mon, 23 Nov 2020 00:42:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727066AbgKWAly (ORCPT ); Sun, 22 Nov 2020 19:41:54 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:44470 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726805AbgKWAlx (ORCPT ); Sun, 22 Nov 2020 19:41:53 -0500 X-IronPort-AV: E=Sophos;i="5.78,361,1599494400"; d="scan'208";a="101635245" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 23 Nov 2020 08:41:47 +0800 Received: from G08CNEXMBPEKD04.g08.fujitsu.local (unknown [10.167.33.201]) by cn.fujitsu.com (Postfix) with ESMTP id 8CBB448990F9; Mon, 23 Nov 2020 08:41:43 +0800 (CST) Received: from G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.203) by G08CNEXMBPEKD04.g08.fujitsu.local (10.167.33.201) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 23 Nov 2020 08:41:44 +0800 Received: from localhost.localdomain (10.167.225.141) by G08CNEXCHPEKD05.g08.fujitsu.local (10.167.33.209) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 23 Nov 2020 08:41:43 +0800 From: Shiyang Ruan To: , , , CC: , , , , , , , , , Subject: [RFC PATCH v2 4/6] pagemap: introduce ->memory_failure() Date: Mon, 23 Nov 2020 08:41:14 +0800 Message-ID: <20201123004116.2453-5-ruansy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201123004116.2453-1-ruansy.fnst@cn.fujitsu.com> References: <20201123004116.2453-1-ruansy.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-yoursite-MailScanner-ID: 8CBB448990F9.AB124 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: ruansy.fnst@cn.fujitsu.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When memory-failure occurs, we call this function which is implemented by each devices. For fsdax, pmem device implements it. Pmem device will find out the block device where the error page located in, gets the filesystem on this block device, and finally call ->storage_lost() to handle the error in filesystem layer. Signed-off-by: Shiyang Ruan --- drivers/nvdimm/pmem.c | 23 +++++++++++++++++++++++ include/linux/memremap.h | 3 +++ 2 files changed, 26 insertions(+) diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index d75a3f370f3c..1b1dbca090fa 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -390,9 +390,32 @@ static void pmem_release_disk(void *__pmem) put_disk(pmem->disk); } +static int pmem_pagemap_memory_failure(struct dev_pagemap *pgmap, + struct mf_recover_controller *mfrc) +{ + struct pmem_device *pdev; + struct gendisk *disk; + loff_t disk_offset; + int rc = 0; + + pdev = container_of(pgmap, struct pmem_device, pgmap); + disk = pdev->disk; + if (!disk) + return -ENXIO; + + disk_offset = PFN_PHYS(mfrc->pfn) - pdev->phys_addr - pdev->data_offset; + if (disk->fops->block_lost) { + rc = disk->fops->block_lost(disk, NULL, disk_offset, mfrc); + if (rc == -ENODEV) + rc = -ENXIO; + } + return rc; +} + static const struct dev_pagemap_ops fsdax_pagemap_ops = { .kill = pmem_pagemap_kill, .cleanup = pmem_pagemap_cleanup, + .memory_failure = pmem_pagemap_memory_failure, }; static int pmem_attach_disk(struct device *dev, diff --git a/include/linux/memremap.h b/include/linux/memremap.h index 79c49e7f5c30..6aae0fe394ba 100644 --- a/include/linux/memremap.h +++ b/include/linux/memremap.h @@ -7,6 +7,7 @@ struct resource; struct device; +struct mf_recover_controller; /** * struct vmem_altmap - pre-allocated storage for vmemmap_populate @@ -87,6 +88,8 @@ struct dev_pagemap_ops { * the page back to a CPU accessible page. */ vm_fault_t (*migrate_to_ram)(struct vm_fault *vmf); + int (*memory_failure)(struct dev_pagemap *pgmap, + struct mf_recover_controller *mfrc); }; #define PGMAP_ALTMAP_VALID (1 << 0) -- 2.29.2