diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-08-29 16:31:34 +0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-10-10 16:55:42 -0700 |
| commit | 5fa0fea27461f5ff7fad07687618db08272e9502 (patch) | |
| tree | 4e1fe825e9e45e0d4dab028b8188fe1ceff1f768 /crypto/scatterwalk.h | |
| parent | e962a653f3146330d99aefa5adadeaed60bc9bb5 (diff) | |
[CRYPTO] scatterwalk: Add scatterwalk_map_and_copy
This patch adds the function scatterwalk_map_and_copy which reads or
writes a chunk of data from a scatterlist at a given offset. It will
be used by authenc which would read/write the authentication data at
the end of the cipher/plain text.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/scatterwalk.h')
| -rw-r--r-- | crypto/scatterwalk.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/crypto/scatterwalk.h b/crypto/scatterwalk.h index f1592cc2d0f..500a220ad90 100644 --- a/crypto/scatterwalk.h +++ b/crypto/scatterwalk.h @@ -74,4 +74,7 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk, void *scatterwalk_map(struct scatter_walk *walk, int out); void scatterwalk_done(struct scatter_walk *walk, int out, int more); +void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg, + unsigned int start, unsigned int nbytes, int out); + #endif /* _CRYPTO_SCATTERWALK_H */ |