From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kara Subject: Re: [PATCH 2/7] vfs: flush and wait for io when setting the immutable flag via SETFLAGS Date: Mon, 24 Jun 2019 17:33:58 +0200 Message-ID: <20190624153358.GH32376@quack2.suse.cz> References: <156116141046.1664939.11424021489724835645.stgit@magnolia> <156116142734.1664939.5074567130774423066.stgit@magnolia> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <156116142734.1664939.5074567130774423066.stgit@magnolia> Sender: linux-btrfs-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Darrick J. Wong" Cc: matthew.garrett@nebula.com, yuchao0@huawei.com, tytso@mit.edu, ard.biesheuvel@linaro.org, josef@toxicpanda.com, clm@fb.com, adilger.kernel@dilger.ca, viro@zeniv.linux.org.uk, jack@suse.com, dsterba@suse.com, jaegeuk@kernel.org, jk@ozlabs.org, reiserfs-devel@vger.kernel.org, linux-efi@vger.kernel.org, devel@lists.orangefs.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-nilfs@vger.kernel.org, linux-mtd@lists.infradead.org, ocfs2-devel@oss.oracle.com, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-btrfs@vger.kernel.org On Fri 21-06-19 16:57:07, Darrick J. Wong wrote: > +/* > + * Flush file data before changing attributes. Caller must hold any locks > + * required to prevent further writes to this file until we're done setting > + * flags. > + */ > +static inline int inode_flush_data(struct inode *inode) > +{ > + inode_dio_wait(inode); > + return filemap_write_and_wait(inode->i_mapping); > +} BTW, how about calling this function inode_drain_writes() instead? The 'flush_data' part is more a detail of implementation of write draining than what we need to do to set immutable flag. Honza -- Jan Kara SUSE Labs, CR