Re: [BUG] dmsetup table output changed from 2.6.18 to 2.6.19-rc3 and breaks yaird.

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On Mon, 30 Oct 2006, Alasdair G Kergon wrote:
>  
> It cannot have been intentional as there was no mention of the change to the
> userspace interface in the git changelog (and the interface version number
> was not changed).
> 
> A new patch is needed to revert the part of the patch that changed the
> userspace interface.
> 
> Please don't forget to copy in the appropriate maintainers when you send
> messages like this one:
>   http://marc.theaimsgroup.com/?l=linux-netdev&m=115547174417490&w=2
> so they can provide acks:-)

Yeah.

Herbert, the breakage _seems_ to be due to the STATUSTYPE_TABLE case 
change:

-		cipher = crypto_tfm_alg_name(cc->tfm);
+		cipher = crypto_blkcipher_name(cc->tfm);

which effectively changes "aes" into "cbc(aes)", which is wrong, since we 
show the chainmode separately.

Please, somebody who knows this area, send me a fix,

		Linus

----
(maybe something like this trivial one? Totally untested, but it would 
seem to be the sane approach)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index a625576..645e3ce 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -925,8 +925,7 @@ static int crypt_status(struct dm_target
 		break;
 
 	case STATUSTYPE_TABLE:
-		cipher = crypto_blkcipher_name(cc->tfm);
-
+		cipher = cc->cipher;
 		chainmode = cc->chainmode;
 
 		if (cc->iv_mode)



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