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From: Eric Biggers <ebiggers@kernel.org>
To: Ira Weiny <ira.weiny@intel.com>
Cc: linux-ext4@vger.kernel.org,
	Andreas Dilger <adilger.kernel@dilger.ca>,
	"Theodore Y. Ts'o" <tytso@mit.edu>, Jan Kara <jack@suse.cz>,
	Al Viro <viro@zeniv.linux.org.uk>,
	Dan Williams <dan.j.williams@intel.com>,
	Dave Chinner <david@fromorbit.com>,
	Christoph Hellwig <hch@lst.de>, Jeff Moyer <jmoyer@redhat.com>,
	"Darrick J. Wong" <darrick.wong@oracle.com>,
	linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/9] fs/ext4: Disallow encryption if inode is DAX
Date: Mon, 18 May 2020 12:44:31 -0700	[thread overview]
Message-ID: <20200518194431.GB121709@gmail.com> (raw)
In-Reply-To: <20200518192357.GE3025231@iweiny-DESK2.sc.intel.com>

On Mon, May 18, 2020 at 12:23:57PM -0700, Ira Weiny wrote:
> > 
> > The other question is what should happen when a file is created in an encrypted
> > directory when the filesystem is mounted with -o dax.  Actually, I think I
> > missed something there.  Currently (based on reading the code) the DAX flag will
> > get set first, and then ext4_set_context()
> 
> See this is where I am confused.  Above you said that ext4_set_context() is only
> called on a directory.  And I agree with you now having seen the check in
> fscrypt_ioctl_set_policy().  So what is the call path you are speaking of here?

Here's what I actually said:

	ext4_set_context() is only called when FS_IOC_SET_ENCRYPTION_POLICY sets
	an encryption policy on an empty directory, *or* when a new inode
	(regular, dir, or symlink) is created in an encrypted directory (thus
	inheriting encryption from its parent).

Just find the places where ->set_context() is called and follow them backwards.

- Eric

  reply	other threads:[~2020-05-18 19:44 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-13  5:43 [PATCH 0/9] Enable ext4 support for per-file/directory DAX operations ira.weiny
2020-05-13  5:43 ` [PATCH 1/9] fs/ext4: Narrow scope of DAX check in setflags ira.weiny
2020-05-13  5:43 ` [PATCH 2/9] fs/ext4: Disallow verity if inode is DAX ira.weiny
2020-05-16  1:49   ` Eric Biggers
2020-05-18  5:32     ` Ira Weiny
2020-05-13  5:43 ` [PATCH 3/9] fs/ext4: Disallow encryption " ira.weiny
2020-05-16  2:02   ` Eric Biggers
2020-05-18  5:03     ` Ira Weiny
2020-05-18 16:24       ` Eric Biggers
2020-05-18 19:23         ` Ira Weiny
2020-05-18 19:44           ` Eric Biggers [this message]
2020-05-20  2:02         ` Ira Weiny
2020-05-20 13:11           ` Jan Kara
2020-05-13  5:43 ` [PATCH 4/9] fs/ext4: Change EXT4_MOUNT_DAX to EXT4_MOUNT_DAX_ALWAYS ira.weiny
2020-05-13 11:25   ` Jan Kara
2020-05-13  5:43 ` [PATCH 5/9] fs/ext4: Update ext4_should_use_dax() ira.weiny
2020-05-13 11:30   ` Jan Kara
2020-05-13  5:43 ` [PATCH 6/9] fs/ext4: Only change S_DAX on inode load ira.weiny
2020-05-13 11:33   ` Jan Kara
2020-05-13  5:43 ` [PATCH 7/9] fs/ext4: Make DAX mount option a tri-state ira.weiny
2020-05-13 14:35   ` Jan Kara
2020-05-13 18:17     ` Darrick J. Wong
2020-05-13 19:53       ` Ira Weiny
2020-05-13  5:43 ` [PATCH 8/9] fs/ext4: Introduce DAX inode flag ira.weiny
2020-05-13 14:47   ` Jan Kara
2020-05-13 21:41     ` Ira Weiny
2020-05-14  6:43       ` Jan Kara
2020-05-14  6:55         ` Ira Weiny
2020-05-13  5:43 ` [PATCH 9/9] Documentation/dax: Update DAX enablement for ext4 ira.weiny

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