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From: Eric Biggers <>
To: Satya Tangirala <>
Subject: Re: [f2fs-dev] [PATCH 0/5] add support for direct I/O with fscrypt using blk-crypto
Date: Thu, 9 Jul 2020 15:46:09 -0700
Message-ID: <> (raw)
In-Reply-To: <>

On Thu, Jul 09, 2020 at 07:47:46PM +0000, Satya Tangirala wrote:
> This patch series adds support for direct I/O with fscrypt using
> blk-crypto. It has been rebased on fscrypt/inline-encryption.

Nit: use fscrypt/master instead.  (Eventually I'll delete the
"inline-encryption" branch.)

> Patch 1 adds two functions to fscrypt that need to be called to determine
> if direct I/O is supported for a request.
> Patches 2 and 3 wire up direct-io and iomap respectively with the functions
> introduced in Patch 1 and set bio crypt contexts on bios when appropriate
> by calling into fscrypt.
> Patches 4 and 5 allow ext4 and f2fs direct I/O to support fscrypt without
> falling back to buffered I/O.
> This patch series was tested by running xfstests with test_dummy_encryption
> with and without the 'inlinecrypt' mount option, and there were no
> meaningful regressions. The only regression was for generic/587 on ext4,
> but that test isn't compatible with test_dummy_encryption in the first
> place, and the test "incorrectly" passes without the 'inlinecrypt' mount
> option - a patch will be sent out to exclude that test when
> test_dummy_encryption is turned on with ext4 (like the other quota related
> tests that use user visible quota files).

Note that xfstests has a check that prevents most of the direct I/O tests from
running when the 'test_dummy_encryption' mount option was specified:

        if [ $FSTYP = "ext4" ] || [ $FSTYP = "f2fs" ] ; then
                if echo "$MOUNT_OPTIONS" | grep -q "test_dummy_encryption"; then
                        _notrun "$FSTYP encryption doesn't support O_DIRECT"

We should try changing that check to not skip the test if the 'inlinecrypt'
mount option was also specified.

- Eric

Linux-f2fs-devel mailing list

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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09 19:47 Satya Tangirala via Linux-f2fs-devel
2020-07-09 19:47 ` [f2fs-dev] [PATCH 1/5] fscrypt: Add functions for direct I/O support Satya Tangirala via Linux-f2fs-devel
2020-07-09 21:54   ` Eric Biggers
2020-07-09 19:47 ` [f2fs-dev] [PATCH 2/5] direct-io: add support for fscrypt using blk-crypto Satya Tangirala via Linux-f2fs-devel
2020-07-10  5:34   ` Christoph Hellwig
2020-07-13 18:36     ` Eric Biggers
2020-07-17  1:56       ` Satya Tangirala via Linux-f2fs-devel
2020-07-09 19:47 ` [f2fs-dev] [PATCH 3/5] iomap: support direct I/O with " Satya Tangirala via Linux-f2fs-devel
2020-07-09 21:59   ` Eric Biggers
2020-07-09 19:47 ` [f2fs-dev] [PATCH 4/5] ext4: " Satya Tangirala via Linux-f2fs-devel
2020-07-09 22:30   ` Eric Biggers
2020-07-09 19:47 ` [f2fs-dev] [PATCH 5/5] f2fs: " Satya Tangirala via Linux-f2fs-devel
2020-07-10  1:05   ` Chao Yu
2020-07-10  1:15     ` Eric Biggers
2020-07-09 22:46 ` Eric Biggers [this message]

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