From patchwork Fri Feb 18 04:14:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Naohiro Aota X-Patchwork-Id: 12750941 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 071A2C43217 for ; Fri, 18 Feb 2022 04:14:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229740AbiBREOo (ORCPT ); Thu, 17 Feb 2022 23:14:44 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:34736 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229645AbiBREOk (ORCPT ); Thu, 17 Feb 2022 23:14:40 -0500 Received: from esa6.hgst.iphmx.com (esa6.hgst.iphmx.com [216.71.154.45]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8674A583B8; Thu, 17 Feb 2022 20:14:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1645157665; x=1676693665; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hbJQ99/aX/+ekcOTer9bncUdMapvBu4fXoS7fXL0Y6E=; b=mM2hjywMtQtKx56bbCwJ365uBlLjtimmajjTW5Zr+BjagvmakJFbfmp8 qGFj+ohXRRVSFi5CwW5oCU9qOaa3uHZW2gjNFSau8CMZdctHcuuiKb1QO ll2L4fs5Ls7/niL4C9/hWtNs506ObxKsxeTZSmQ7Bn2+qbUc+lbKmIdKQ bFRdpYX1dZjiOy43AC7IVhyt9D8WVBPNs/9lF3PZWlqiD3KnCyHw+4OVH YwSBP276KM6ZpWTLnfsMevB/xnNcHJiGX49clmadZ5N3MLrZTNNn6ZB26 Pn4qeC/uaGmKlqmuif4iDksIgmKG1WdeIXAu0mKCZY37swQnRdR5c+SJT g==; X-IronPort-AV: E=Sophos;i="5.88,377,1635177600"; d="scan'208";a="194229485" Received: from uls-op-cesaip02.wdc.com (HELO uls-op-cesaep02.wdc.com) ([199.255.45.15]) by ob1.hgst.iphmx.com with ESMTP; 18 Feb 2022 12:14:25 +0800 IronPort-SDR: ne+oDq+HZT4GVD+/3qLLn902XXtPHPjPbtF2UXKw68HDJrpRK0r4YTYrBjFm+ZjIyB+8oTkJFV FZnKuAcw2ZRAfwiFTIY02kIEPHdnqF2bT1GuW8htBdAA+O21Io93qiA4mknAHpUiPssG1J0zgQ jJKnmFSSVvWy/QE4rDEMeTD/ogJW8bq361LzHKbHhqEDU3WdNn82WQodg9CrtTZUhf7QboaZgo IEq4F2pO6SGcTKTSPFJcMaVpXrGvY6hGTMl2o0b8ykTafnCkBYOL2s2HyMFsbemygxGTpfclxP nNo97ZleP8OgtugLLOkm0nVw Received: from uls-op-cesaip01.wdc.com ([10.248.3.36]) by uls-op-cesaep02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Feb 2022 19:46:02 -0800 IronPort-SDR: E3pafuPGoQYGF39A3TtzSrsHXFLjowlaDOOpYi96BCuy0nE5ZAba5zOvVti2IT48OaQKIAuL3w gAHo6ceJDtF1DGpvIO9SRSPlyAT7I9h7v+ZJJa7Eh/ByDTcnQTKe1loW2xxKjfBl0qLwGijzEz UlVVjbDZpmg9WYlBpvJ+y0aHjmfrpSirTkYErzRP8rdK8H0jQmH/b0+2evUifOuA/0U1jh6Uro wiBqX7pPwJjljNi1U2GyHG2/t/al2q0fsSsMWNfgQz3mYpUIDuvrz2G1gvXoVStGDQi/+oWk4h hlc= WDCIronportException: Internal Received: from fdxrrn2.ad.shared (HELO naota-xeon.wdc.com) ([10.225.54.90]) by uls-op-cesaip01.wdc.com with ESMTP; 17 Feb 2022 20:14:23 -0800 From: Naohiro Aota To: linux-btrfs@vger.kernel.org Cc: johannes.thumshirn@wdc.com, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, david@fromorbit.com, Naohiro Aota Subject: [PATCH v3 1/2] fs: add asserting functions for sb_start_{write,pagefault,intwrite} Date: Fri, 18 Feb 2022 13:14:18 +0900 Message-Id: <1ae764ab433d6f118c3ce20da2789a6c901a6359.1645157220.git.naohiro.aota@wdc.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Add a function sb_write_started() to return if sb_start_write() is properly called. It is used in the next commit. Also, add the similar functions for sb_start_pagefault() and sb_start_intwrite(). Signed-off-by: Naohiro Aota --- include/linux/fs.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/fs.h b/include/linux/fs.h index e2d892b201b0..8c7d01388feb 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1732,6 +1732,11 @@ static inline bool __sb_start_write_trylock(struct super_block *sb, int level) #define __sb_writers_release(sb, lev) \ percpu_rwsem_release(&(sb)->s_writers.rw_sem[(lev)-1], 1, _THIS_IP_) +static inline bool __sb_write_started(struct super_block *sb, int level) +{ + return lockdep_is_held_type(sb->s_writers.rw_sem + level - 1, 1); +} + /** * sb_end_write - drop write access to a superblock * @sb: the super we wrote to @@ -1797,6 +1802,11 @@ static inline bool sb_start_write_trylock(struct super_block *sb) return __sb_start_write_trylock(sb, SB_FREEZE_WRITE); } +static inline bool sb_write_started(struct super_block *sb) +{ + return __sb_write_started(sb, SB_FREEZE_WRITE); +} + /** * sb_start_pagefault - get write access to a superblock from a page fault * @sb: the super we write to @@ -1821,6 +1831,11 @@ static inline void sb_start_pagefault(struct super_block *sb) __sb_start_write(sb, SB_FREEZE_PAGEFAULT); } +static inline bool sb_pagefault_started(struct super_block *sb) +{ + return __sb_write_started(sb, SB_FREEZE_PAGEFAULT); +} + /** * sb_start_intwrite - get write access to a superblock for internal fs purposes * @sb: the super we write to @@ -1844,6 +1859,11 @@ static inline bool sb_start_intwrite_trylock(struct super_block *sb) return __sb_start_write_trylock(sb, SB_FREEZE_FS); } +static inline bool sb_intwrite_started(struct super_block *sb) +{ + return __sb_write_started(sb, SB_FREEZE_FS); +} + bool inode_owner_or_capable(struct user_namespace *mnt_userns, const struct inode *inode);