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From: Jaegeuk Kim <jaegeuk@kernel.org>
To: Satya Tangirala <satyat@google.com>
Cc: linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org,
	Eric Biggers <ebiggers@google.com>
Subject: Re: [PATCH v4 4/7] ext4: support direct I/O with fscrypt using blk-crypto
Date: Wed, 22 Jul 2020 10:07:39 -0700
Message-ID: <20200722170739.GG3912099@google.com> (raw)
In-Reply-To: <20200720233739.824943-5-satyat@google.com>

On 07/20, Satya Tangirala wrote:
> From: Eric Biggers <ebiggers@google.com>
> 
> Wire up ext4 with fscrypt direct I/O support. direct I/O with fscrypt is
> only supported through blk-crypto (i.e. CONFIG_BLK_INLINE_ENCRYPTION must
> have been enabled, the 'inlinecrypt' mount option must have been specified,
> and either hardware inline encryption support must be present or
> CONFIG_BLK_INLINE_ENCYRPTION_FALLBACK must have been enabled). Further,
> direct I/O on encrypted files is only supported when I/O is aligned
> to the filesystem block size (which is *not* necessarily the same as the
> block device's block size).
> 
> Signed-off-by: Eric Biggers <ebiggers@google.com>
> Co-developed-by: Satya Tangirala <satyat@google.com>
> Signed-off-by: Satya Tangirala <satyat@google.com>

Reviewed-by: Jaegeuk Kim <jaegeuk@kernel.org>

> ---
>  fs/ext4/file.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/ext4/file.c b/fs/ext4/file.c
> index 2a01e31a032c..d534f72675d9 100644
> --- a/fs/ext4/file.c
> +++ b/fs/ext4/file.c
> @@ -36,9 +36,11 @@
>  #include "acl.h"
>  #include "truncate.h"
>  
> -static bool ext4_dio_supported(struct inode *inode)
> +static bool ext4_dio_supported(struct kiocb *iocb, struct iov_iter *iter)
>  {
> -	if (IS_ENABLED(CONFIG_FS_ENCRYPTION) && IS_ENCRYPTED(inode))
> +	struct inode *inode = file_inode(iocb->ki_filp);
> +
> +	if (!fscrypt_dio_supported(iocb, iter))
>  		return false;
>  	if (fsverity_active(inode))
>  		return false;
> @@ -61,7 +63,7 @@ static ssize_t ext4_dio_read_iter(struct kiocb *iocb, struct iov_iter *to)
>  		inode_lock_shared(inode);
>  	}
>  
> -	if (!ext4_dio_supported(inode)) {
> +	if (!ext4_dio_supported(iocb, to)) {
>  		inode_unlock_shared(inode);
>  		/*
>  		 * Fallback to buffered I/O if the operation being performed on
> @@ -490,7 +492,7 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
>  	}
>  
>  	/* Fallback to buffered I/O if the inode does not support direct I/O. */
> -	if (!ext4_dio_supported(inode)) {
> +	if (!ext4_dio_supported(iocb, from)) {
>  		if (ilock_shared)
>  			inode_unlock_shared(inode);
>  		else
> -- 
> 2.28.0.rc0.105.gf9edc3c819-goog

  reply index

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-20 23:37 [PATCH v4 0/7] add support for " Satya Tangirala
2020-07-20 23:37 ` [PATCH v4 1/7] fscrypt: Add functions for direct I/O support Satya Tangirala
2020-07-22 17:04   ` Jaegeuk Kim
2020-07-20 23:37 ` [PATCH v4 2/7] direct-io: add support for fscrypt using blk-crypto Satya Tangirala
2020-07-22 17:05   ` Jaegeuk Kim
2020-07-20 23:37 ` [PATCH v4 3/7] iomap: support direct I/O with " Satya Tangirala
2020-07-22 17:06   ` Jaegeuk Kim
2020-07-22 21:16   ` Dave Chinner
2020-07-22 22:34     ` Eric Biggers
2020-07-22 22:44       ` Matthew Wilcox
2020-07-22 23:12         ` Eric Biggers
2020-07-22 23:26       ` Eric Biggers
2020-07-22 23:32         ` Darrick J. Wong
2020-07-22 23:43           ` Eric Biggers
2020-07-23 22:07       ` Dave Chinner
2020-07-23 23:03         ` Eric Biggers
2020-07-24  1:39           ` Dave Chinner
2020-07-24  3:46             ` Eric Biggers
2020-07-24  5:31               ` Dave Chinner
2020-07-24 17:41                 ` Eric Biggers
2020-07-25 23:47                   ` Dave Chinner
2020-07-25 23:59                     ` Dave Chinner
2020-07-26  2:42                     ` Eric Biggers
2020-07-27 17:16                       ` Eric Biggers
2020-07-20 23:37 ` [PATCH v4 4/7] ext4: " Satya Tangirala
2020-07-22 17:07   ` Jaegeuk Kim [this message]
2020-07-20 23:37 ` [PATCH v4 5/7] f2fs: " Satya Tangirala
2020-07-21 20:11   ` Jaegeuk Kim
2020-07-20 23:37 ` [PATCH v4 6/7] fscrypt: document inline encryption support Satya Tangirala
2020-07-22 17:01   ` Jaegeuk Kim
2020-07-20 23:37 ` [PATCH v4 7/7] fscrypt: update documentation for direct I/O support Satya Tangirala
2020-07-21  0:47   ` Eric Biggers
2020-07-22 16:57     ` Jaegeuk Kim
2020-07-21  0:56 ` [PATCH v4 0/7] add support for direct I/O with fscrypt using blk-crypto Eric Biggers

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