From: Herbert Xu <herbert@gondor.apana.org.au>
To: Fruhwirth Clemens <clemens@endorphin.org>
Cc: James Morris <jmorris@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
cryptoapi@lists.logix.cz, linux-crypto@vger.kernel.org
Subject: [9/*] [CRYPTO] Remap when walk_out crosses page in crypt()
Date: Tue, 22 Mar 2005 22:25:04 +1100 [thread overview]
Message-ID: <20050322112504.GC7224@gondor.apana.org.au> (raw)
In-Reply-To: <20050322112416.GB7224@gondor.apana.org.au>
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Hi:
This is needed so that we can keep the in_place assignment outside the
inner loop. Without this in pathalogical situations we can start out
having walk_out being different from walk_in, but when walk_out crosses
a page it may converge with walk_in.
Cheers,
--
Visit Openswan at http://www.openswan.org/
Email: Herbert Xu ~{PmV>HI~} <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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===== cipher.c 1.26 vs edited =====
--- 1.26/crypto/cipher.c 2005-03-22 21:56:21 +11:00
+++ edited/cipher.c 2005-03-22 21:59:53 +11:00
@@ -129,7 +129,9 @@
complete_dst(&walk_out, bsize, dst_p, in_place);
nbytes -= bsize;
- } while (nbytes && !scatterwalk_across_pages(&walk_in, bsize));
+ } while (nbytes &&
+ !scatterwalk_across_pages(&walk_in, bsize) &&
+ !scatterwalk_across_pages(&walk_out, bsize));
scatterwalk_done(&walk_in, 0, nbytes);
scatterwalk_done(&walk_out, 1, nbytes);
next prev parent reply other threads:[~2005-03-22 11:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-21 9:40 [0/5] [CRYPTO] Speed up crypt() Herbert Xu
2005-03-21 9:48 ` [1/5] [CRYPTO] Do scatterwalk_whichbuf inline Herbert Xu
2005-03-21 9:49 ` [2/5] [CRYPTO] Handle in_place flag in crypt() Herbert Xu
2005-03-21 9:50 ` [3/5] [CRYPTO] Split src/dst handling out from crypt() Herbert Xu
2005-03-21 9:52 ` [4/5] [CRYPTO] Eliminate most calls to scatterwalk_copychunks " Herbert Xu
2005-03-21 9:53 ` [5/5] [CRYPTO] Optimise kmap calls in crypt() Herbert Xu
2005-03-21 11:30 ` Fruhwirth Clemens
2005-03-22 1:13 ` Herbert Xu
2005-03-22 10:24 ` Fruhwirth Clemens
2005-03-22 11:22 ` [7/*] [CRYPTO] Kill obsolete iv check in cbc_process() Herbert Xu
2005-03-22 11:24 ` [8/*] [CRYPTO] Split cbc_process into encrypt/decrypt Herbert Xu
2005-03-22 11:25 ` Herbert Xu [this message]
2005-03-23 20:17 ` [9/*] [CRYPTO] Remap when walk_out crosses page in crypt() David S. Miller
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