From patchwork Mon Nov 29 14:26:27 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 12644853 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36661C433F5 for ; Mon, 29 Nov 2021 14:28:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245508AbhK2OcH (ORCPT ); Mon, 29 Nov 2021 09:32:07 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:43942 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378421AbhK2OaE (ORCPT ); Mon, 29 Nov 2021 09:30:04 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1638195996; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hQmiqiGt9+ovdGbP3rVd6DFEm7R74W4+cSPSPt1xe3A=; b=hr6gL+PpTiTYdi+SxpvkskG5+TIWP48O/48Xub9z/WeI3HC+jdnZW+P5xi0GjFi8hN/9/w 15UB54YvpZOH0/m99hYOncRAKDElUhs/NoWAJ0DEvJUAN/Tj129Y/k7NvgVul+6pBDCG+J 5tvp8HBYIVubmEKmdwz9QxWBv0EQU9k= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-290-0mMZwMasNKubIWx47XdNIw-1; Mon, 29 Nov 2021 09:26:33 -0500 X-MC-Unique: 0mMZwMasNKubIWx47XdNIw-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 582721018721; Mon, 29 Nov 2021 14:26:31 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.25]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3A73E5D9C0; Mon, 29 Nov 2021 14:26:28 +0000 (UTC) Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 16/64] fscache: Add a function for a cache backend to note an I/O error From: David Howells To: linux-cachefs@redhat.com Cc: dhowells@redhat.com, Trond Myklebust , Anna Schumaker , Steve French , Dominique Martinet , Jeff Layton , Matthew Wilcox , Alexander Viro , Omar Sandoval , Linus Torvalds , linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, ceph-devel@vger.kernel.org, v9fs-developer@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 29 Nov 2021 14:26:27 +0000 Message-ID: <163819598741.215744.891281275151382095.stgit@warthog.procyon.org.uk> In-Reply-To: <163819575444.215744.318477214576928110.stgit@warthog.procyon.org.uk> References: <163819575444.215744.318477214576928110.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org Add a function to the backend API to note an I/O error in a cache. Signed-off-by: David Howells cc: linux-cachefs@redhat.com --- fs/fscache/cache.c | 20 ++++++++++++++++++++ include/linux/fscache-cache.h | 2 ++ 2 files changed, 22 insertions(+) diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c index bbd102be91c4..25eac61f1c29 100644 --- a/fs/fscache/cache.c +++ b/fs/fscache/cache.c @@ -321,6 +321,26 @@ void fscache_end_cache_access(struct fscache_cache *cache, enum fscache_access_t wake_up_var(&cache->n_accesses); } +/** + * fscache_io_error - Note a cache I/O error + * @cache: The record describing the cache + * + * Note that an I/O error occurred in a cache and that it should no longer be + * used for anything. This also reports the error into the kernel log. + * + * See Documentation/filesystems/caching/backend-api.rst for a complete + * description. + */ +void fscache_io_error(struct fscache_cache *cache) +{ + if (fscache_set_cache_state_maybe(cache, + FSCACHE_CACHE_IS_ACTIVE, + FSCACHE_CACHE_GOT_IOERROR)) + pr_err("Cache '%s' stopped due to I/O error\n", + cache->name); +} +EXPORT_SYMBOL(fscache_io_error); + /** * fscache_withdraw_cache - Withdraw a cache from the active service * @cache: The cache cookie diff --git a/include/linux/fscache-cache.h b/include/linux/fscache-cache.h index a10b66ca3544..936ef731bbc7 100644 --- a/include/linux/fscache-cache.h +++ b/include/linux/fscache-cache.h @@ -73,6 +73,8 @@ extern int fscache_add_cache(struct fscache_cache *cache, extern void fscache_withdraw_cache(struct fscache_cache *cache); extern void fscache_withdraw_volume(struct fscache_volume *volume); +extern void fscache_io_error(struct fscache_cache *cache); + extern void fscache_end_volume_access(struct fscache_volume *volume, struct fscache_cookie *cookie, enum fscache_access_trace why);