From patchwork Mon Feb 20 18:31:33 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Sterba X-Patchwork-Id: 9583463 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 41A41604A0 for ; Mon, 20 Feb 2017 18:32:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 40A192022C for ; Mon, 20 Feb 2017 18:32:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 35BFA205A4; Mon, 20 Feb 2017 18:32:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 97E10203C0 for ; Mon, 20 Feb 2017 18:32:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752186AbdBTScL (ORCPT ); Mon, 20 Feb 2017 13:32:11 -0500 Received: from mx2.suse.de ([195.135.220.15]:45202 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751041AbdBTScL (ORCPT ); Mon, 20 Feb 2017 13:32:11 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 71909AC17 for ; Mon, 20 Feb 2017 18:32:04 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id 2D56FDA8DD; Mon, 20 Feb 2017 19:31:33 +0100 (CET) From: David Sterba To: linux-btrfs@vger.kernel.org Cc: David Sterba Subject: [PATCH 4/4] btrfs: add dummy callback for readpage_io_failed and drop checks Date: Mon, 20 Feb 2017 19:31:33 +0100 Message-Id: <944371b69d2516a81dc182d6cf85e74583cf0ba4.1487615195.git.dsterba@suse.com> X-Mailer: git-send-email 2.10.1 In-Reply-To: References: Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Make extent_io_ops::readpage_io_failed_hook callback mandatory and define a dummy function for btrfs_extent_io_ops. As the failed IO callback is not performance critical, the branch vs extra trade off does not hurt. Signed-off-by: David Sterba --- fs/btrfs/disk-io.c | 2 +- fs/btrfs/extent_io.c | 2 +- fs/btrfs/extent_io.h | 2 +- fs/btrfs/inode.c | 7 +++++++ 4 files changed, 10 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 0715b6f3f686..fbf4921f4d60 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -4658,7 +4658,7 @@ static const struct extent_io_ops btree_extent_io_ops = { .readpage_end_io_hook = btree_readpage_end_io_hook, /* note we're sharing with inode.c for the merge bio hook */ .merge_bio_hook = btrfs_merge_bio_hook, + .readpage_io_failed_hook = btree_io_failed_hook, /* optional callbacks */ - .readpage_io_failed_hook = btree_io_failed_hook, }; diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index f5cff93ab152..eaee7bb2ff7c 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -2578,7 +2578,7 @@ static void end_bio_extent_readpage(struct bio *bio) if (likely(uptodate)) goto readpage_ok; - if (tree->ops && tree->ops->readpage_io_failed_hook) { + if (tree->ops) { ret = tree->ops->readpage_io_failed_hook(page, mirror); if (!ret && !bio->bi_error) uptodate = 1; diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 5c5e2e6cfb9e..63c8cc970b1c 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -102,6 +102,7 @@ struct extent_io_ops { int (*merge_bio_hook)(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); + int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); /* * Optional hooks, called if the pointer is not NULL @@ -109,7 +110,6 @@ struct extent_io_ops { int (*fill_delalloc)(struct inode *inode, struct page *locked_page, u64 start, u64 end, int *page_started, unsigned long *nr_written); - int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); int (*writepage_start_hook)(struct page *page, u64 start, u64 end); void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 72faf9b5616a..a74191fa3934 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -10503,6 +10503,12 @@ static int btrfs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) } +__attribute__((const)) +static int dummy_readpage_io_failed_hook(struct page *page, int failed_mirror) +{ + return 0; +} + static const struct inode_operations btrfs_dir_inode_operations = { .getattr = btrfs_getattr, .lookup = btrfs_lookup, @@ -10545,6 +10551,7 @@ static const struct extent_io_ops btrfs_extent_io_ops = { .submit_bio_hook = btrfs_submit_bio_hook, .readpage_end_io_hook = btrfs_readpage_end_io_hook, .merge_bio_hook = btrfs_merge_bio_hook, + .readpage_io_failed_hook = dummy_readpage_io_failed_hook, /* optional callbacks */ .fill_delalloc = run_delalloc_range,