From patchwork Fri Aug 11 11:04:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jan Kara X-Patchwork-Id: 13350625 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 2309AC0015E for ; Fri, 11 Aug 2023 11:06:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236170AbjHKLGJ (ORCPT ); Fri, 11 Aug 2023 07:06:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232555AbjHKLFh (ORCPT ); Fri, 11 Aug 2023 07:05:37 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED26B19AC; Fri, 11 Aug 2023 04:05:11 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 5A64D1F8A6; Fri, 11 Aug 2023 11:05:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1691751906; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Dm65YPBU4WF++93NcPRGO369cin1mb5NbYyvGd96QdM=; b=rnFgytbUUSfM1yYlAEV3N0MlVgYnNtYUI/uZIYRClxlsK15vDvg3JUNj4lQtLlS7NO9W59 3umrFRvx+Dt04JUTb+zDUK6X/9xPE/FaYOowLuTGpPiyoFRY0q15CyLkjSAdirzjvC+Td/ pQVPfVJvQBHxyWEWhV+Hb1RNkZD1YrQ= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1691751906; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Dm65YPBU4WF++93NcPRGO369cin1mb5NbYyvGd96QdM=; b=koJjKAtqi+tSuBCmnka8qupqnsy/l+xssfsV98M70AFB/Vphua6mq0DUUwD0JApj03fnFM kUhmqENMLrI/R7Cw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 4CE6913AA3; Fri, 11 Aug 2023 11:05:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id VBbDEuIV1mRsRQAAMHmgww (envelope-from ); Fri, 11 Aug 2023 11:05:06 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id 296A6A0791; Fri, 11 Aug 2023 13:05:05 +0200 (CEST) From: Jan Kara To: Cc: , Christoph Hellwig , Jan Kara , linux-mm@kvack.org, Andrew Morton Subject: [PATCH 18/29] mm/swap: Convert to use bdev_open_by_dev() Date: Fri, 11 Aug 2023 13:04:49 +0200 Message-Id: <20230811110504.27514-18-jack@suse.cz> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230810171429.31759-1-jack@suse.cz> References: <20230810171429.31759-1-jack@suse.cz> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2720; i=jack@suse.cz; h=from:subject; bh=FDmfvKiq2bPU3yLB5qvHKCGkR05qUs5JO4bCliChJ1c=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBk1hXSQQNy+iXJtgc29QwdVw1/9omYyGR1nnhzV2w2 rjBIYu2JATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCZNYV0gAKCRCcnaoHP2RA2auVB/ 9TOquphUJz+/zD06SKTcFzZ5Ihz8Qv4AH+/Y0K2oNQdnpm6oTeRhTVGJJkHhBkq2ZNdeIyh+6vtxNH raAsIOSezmjfRr234tUBor6E/VtlzBiu/a8gQbXu9pm6+tthX5mSLG3jXYxxXzOuunswiaL4I5pUcS Is8x0LNIEL/uNXjJX4UtpRlTEXCy0MNR/0DyXQGrqw3aGrNsD2XNyR4aMzaZ6swS7qXy9Ls3SnxAja r5alxCecit/eNbyzB8+yve8qi1rE0DuyiDz04SzZ5ViT0ua81LE6piK/Z5vfuUmmm+If9chDVBYT9a 62MeMLplsGWXaK9L5nXBJKzndSjQZ0 X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Convert swapping code to use bdev_open_by_dev() and pass the handle around. CC: linux-mm@kvack.org CC: Andrew Morton Signed-off-by: Jan Kara --- include/linux/swap.h | 1 + mm/swapfile.c | 23 ++++++++++++----------- 2 files changed, 13 insertions(+), 11 deletions(-) diff --git a/include/linux/swap.h b/include/linux/swap.h index 456546443f1f..62334f8d4932 100644 --- a/include/linux/swap.h +++ b/include/linux/swap.h @@ -298,6 +298,7 @@ struct swap_info_struct { unsigned int __percpu *cluster_next_cpu; /*percpu index for next allocation */ struct percpu_cluster __percpu *percpu_cluster; /* per cpu's swap location */ struct rb_root swap_extent_root;/* root of the swap extent rbtree */ + struct bdev_handle *bdev_handle;/* open handle of the bdev */ struct block_device *bdev; /* swap device or bdev of swap file */ struct file *swap_file; /* seldom referenced */ unsigned int old_block_size; /* seldom referenced */ diff --git a/mm/swapfile.c b/mm/swapfile.c index 8e6dde68b389..621428ee6895 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2526,11 +2526,10 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile) exit_swap_address_space(p->type); inode = mapping->host; - if (S_ISBLK(inode->i_mode)) { - struct block_device *bdev = I_BDEV(inode); - - set_blocksize(bdev, old_block_size); - blkdev_put(bdev, p); + if (p->bdev_handle) { + set_blocksize(p->bdev, old_block_size); + bdev_release(p->bdev_handle); + p->bdev_handle = NULL; } inode_lock(inode); @@ -2760,13 +2759,14 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode) int error; if (S_ISBLK(inode->i_mode)) { - p->bdev = blkdev_get_by_dev(inode->i_rdev, + p->bdev_handle = bdev_open_by_dev(inode->i_rdev, BLK_OPEN_READ | BLK_OPEN_WRITE, p, NULL); - if (IS_ERR(p->bdev)) { - error = PTR_ERR(p->bdev); - p->bdev = NULL; + if (IS_ERR(p->bdev_handle)) { + error = PTR_ERR(p->bdev_handle); + p->bdev_handle = NULL; return error; } + p->bdev = p->bdev_handle->bdev; p->old_block_size = block_size(p->bdev); error = set_blocksize(p->bdev, PAGE_SIZE); if (error < 0) @@ -3210,9 +3210,10 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) p->percpu_cluster = NULL; free_percpu(p->cluster_next_cpu); p->cluster_next_cpu = NULL; - if (inode && S_ISBLK(inode->i_mode) && p->bdev) { + if (p->bdev_handle) { set_blocksize(p->bdev, p->old_block_size); - blkdev_put(p->bdev, p); + bdev_release(p->bdev_handle); + p->bdev_handle = NULL; } inode = NULL; destroy_swap_extents(p);