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From: Johannes Thumshirn <jthumshirn@suse.de>
To: Chris Mason <clm@fb.com>
Cc: David Sterba <dsterba@suse.com>,
	Linux BTRFS Mailinglist <linux-btrfs@vger.kernel.org>
Subject: Re: [PATCH 14/17] btrfs: directly call into crypto framework for checsumming
Date: Tue, 14 May 2019 14:46:26 +0200	[thread overview]
Message-ID: <20190514124626.GA14840@x250> (raw)
In-Reply-To: <18303EEF-24F1-40BB-9448-A55324AA119A@fb.com>

On Fri, May 10, 2019 at 01:45:47PM +0000, Chris Mason wrote:
> I'm a little concerned about about btrfs_csum_data() and 
> btrfs_csum_final() below.  We're using two different 
> SHASH_DESC_ON_STACK() and then overwriting internals (shash_desc_ctx()) 
> with the assumption that whatever we're doing is going to be the same as 
> using the same shash_desc struct for both the update and final calls.  I 
> think we should be either using or adding a helper to the crypto api for 
> this.  We're digging too deep into cryptoapi private structs with the 
> current usage.
 
I think I found the solution. Instead of doing memset() + memcpy() +
crypto_shash_update() + crypto_shash_final(), I could call
crypto_shash_digest() which would wrap all of them for me in both the crc32c
and sha256 case.

Let me have a look and throw it in some testing.

> Otherwise, thanks for doing this, it looks great overall.

Thanks :)
-- 
Johannes Thumshirn                            SUSE Labs Filesystems
jthumshirn@suse.de                                +49 911 74053 689
SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah
HRB 21284 (AG Nürnberg)
Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850

  parent reply	other threads:[~2019-05-14 12:46 UTC|newest]

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-10 11:15 [PATCH 00/17] Add support for SHA-256 checksums Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 01/17] btrfs: use btrfs_csum_data() instead of directly calling crc32c Johannes Thumshirn
2019-05-10 16:16   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 02/17] btrfs: resurrect btrfs_crc32c() Johannes Thumshirn
2019-05-10 16:16   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 03/17] btrfs: use btrfs_crc32c() instead of btrfs_extref_hash() Johannes Thumshirn
2019-05-10 13:03   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 04/17] btrfs: use btrfs_crc32c() instead of btrfs_name_hash() Johannes Thumshirn
2019-05-10 12:56   ` Chris Mason
2019-05-13  7:04     ` Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 05/17] btrfs: don't assume ordered sums to be 4 bytes Johannes Thumshirn
2019-05-10 13:25   ` Nikolay Borisov
2019-05-10 13:27     ` Nikolay Borisov
2019-05-13  7:06       ` Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 06/17] btrfs: dont assume compressed_bio " Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 07/17] btrfs: use btrfs_crc32c{,_final}() in for free space cache Johannes Thumshirn
2019-05-10 13:27   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 08/17] btrfs: format checksums according to type for printing Johannes Thumshirn
2019-05-10 13:28   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 09/17] btrfs: add common checksum type validation Johannes Thumshirn
2019-05-10 13:37   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 10/17] btrfs: check for supported superblock checksum type before checksum validation Johannes Thumshirn
2019-05-10 13:37   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 11/17] btrfs: Simplify btrfs_check_super_csum() and get rid of size assumptions Johannes Thumshirn
2019-05-10 13:41   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 12/17] btrfs: add boilerplate code for directly including the crypto framework Johannes Thumshirn
2019-05-10 16:28   ` Nikolay Borisov
2019-05-10 11:15 ` [PATCH 13/17] btrfs: pass in an fs_info to btrfs_csum_{data,final}() Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 14/17] btrfs: directly call into crypto framework for checsumming Johannes Thumshirn
2019-05-10 13:45   ` Chris Mason
2019-05-10 13:54     ` Chris Mason
2019-05-13  7:17       ` Johannes Thumshirn
2019-05-13 13:55         ` Chris Mason
2019-05-14 12:46     ` Johannes Thumshirn [this message]
2019-05-13 13:00   ` David Sterba
2019-05-13 13:01     ` Johannes Thumshirn
2019-05-13 14:30       ` David Sterba
2019-05-10 11:15 ` [PATCH 15/17] btrfs: remove assumption about csum type form btrfs_csum_{data,final}() Johannes Thumshirn
2019-05-13 12:56   ` David Sterba
2019-05-10 11:15 ` [PATCH 16/17] btrfs: remove assumption about csum type form btrfs_print_data_csum_error() Johannes Thumshirn
2019-05-10 11:15 ` [PATCH 17/17] btrfs: add sha256 as another checksum algorithm Johannes Thumshirn
2019-05-10 12:30   ` Nikolay Borisov
2019-05-13  7:11     ` Johannes Thumshirn
2019-05-13 12:54       ` David Sterba
2019-05-13 12:55         ` Johannes Thumshirn
2019-05-15  1:45         ` Jeff Mahoney
2019-05-13 12:55     ` David Sterba
2019-05-13 12:58       ` Johannes Thumshirn
2019-05-15 17:27 ` [PATCH 00/17] Add support for SHA-256 checksums David Sterba
2019-05-16  6:30   ` Paul Jones
2019-05-16  8:16     ` Nikolay Borisov
2019-05-16  8:20       ` Johannes Thumshirn
2019-05-17 18:36   ` Diego Calleja
2019-05-17 19:07     ` Johannes Thumshirn
2019-05-18  0:38       ` Adam Borowski
2019-05-20  7:47         ` Johannes Thumshirn
2019-05-20 11:34           ` Austin S. Hemmelgarn
2019-05-20 11:57             ` Johannes Thumshirn
2019-05-20 11:42     ` Austin S. Hemmelgarn
2019-05-30 12:21     ` David Sterba

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