linux-ext4 - Re: [PATCH 2/7] vfs: flush and wait for io when setting the immutable flag via SETFLAGS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 24 Jun 2019 09:36:42 -0700
From:   "Darrick J. Wong" <darrick.wong@...cle.com>
To:     Jan Kara <jack@...e.cz>
Cc:     matthew.garrett@...ula.com, yuchao0@...wei.com, tytso@....edu,
        ard.biesheuvel@...aro.org, josef@...icpanda.com, clm@...com,
        adilger.kernel@...ger.ca, viro@...iv.linux.org.uk, jack@...e.com,
        dsterba@...e.com, jaegeuk@...nel.org, jk@...abs.org,
        reiserfs-devel@...r.kernel.org, linux-efi@...r.kernel.org,
        devel@...ts.orangefs.org, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-xfs@...r.kernel.org,
        linux-mm@...ck.org, linux-nilfs@...r.kernel.org,
        linux-mtd@...ts.infradead.org, ocfs2-devel@....oracle.com,
        linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 2/7] vfs: flush and wait for io when setting the
 immutable flag via SETFLAGS

On Mon, Jun 24, 2019 at 05:33:58PM +0200, Jan Kara wrote:
> 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.

Ok, that's a much better description of what the function does.

--D

> 
> 								Honza
> -- 
> Jan Kara <jack@...e.com>
> SUSE Labs, CR