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]
Message-ID: <20180321074948.GA2746@jagdpanzerIV>
Date:   Wed, 21 Mar 2018 16:49:48 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Maninder Singh <maninder1.s@...sung.com>
Cc:     herbert@...dor.apana.org.au, davem@...emloft.net,
        minchan@...nel.org, ngupta@...are.org,
        sergey.senozhatsky.work@...il.com, keescook@...omium.org,
        anton@...msg.org, ccross@...roid.com, tony.luck@...el.com,
        akpm@...ux-foundation.org, colin.king@...onical.com,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        pankaj.m@...sung.com, a.sahrawat@...sung.com, v.narang@...sung.com
Subject: Re: [PATCH 1/1] lz4: Implement lz4 with dynamic offset length.

On (03/21/18 10:10), Maninder Singh wrote:
[..]
> +static struct crypto_alg alg_lz4_dyn = {
> +	.cra_name		= "lz4_dyn",
> +	.cra_flags		= CRYPTO_ALG_TYPE_COMPRESS,
> +	.cra_ctxsize		= sizeof(struct lz4_ctx),
> +	.cra_module		= THIS_MODULE,
> +	.cra_list		= LIST_HEAD_INIT(alg_lz4_dyn.cra_list),
> +	.cra_init		= lz4_init,
> +	.cra_exit		= lz4_exit,
> +	.cra_u			= { .compress = {
> +	.coa_compress		= lz4_compress_crypto_dynamic,
> +	.coa_decompress		= lz4_decompress_crypto_dynamic } }
> +};

[..]

> diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
> index 4ed0a78..5bc5aab 100644
> --- a/drivers/block/zram/zcomp.c
> +++ b/drivers/block/zram/zcomp.c
> @@ -17,11 +17,15 @@
>  #include <linux/crypto.h>
>  
>  #include "zcomp.h"
> +#define KB	(1 << 10)
>  
>  static const char * const backends[] = {
>  	"lzo",
>  #if IS_ENABLED(CONFIG_CRYPTO_LZ4)
>  	"lz4",
> +#if (PAGE_SIZE < (32 * KB))
> +	"lz4_dyn",
> +#endif

This is not the list of supported algorithms. It's the list of
recommended algorithms. You can configure zram to use any of
available and known to Crypto API algorithms. Including lz4_dyn
on PAGE_SIZE > 32K systems.

	-ss

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ