diff options
| author | Daniel P. Berrange <berrange@redhat.com> | 2017-06-23 17:24:09 +0100 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2017-07-11 17:44:56 +0200 |
| commit | 446d306d23c8b568affec104d74f84f48d5eaa24 (patch) | |
| tree | 3c9ee21b370901005a9bdf35fd92f3281f803300 /block/qcow2-cluster.c | |
| parent | d85f4222b4681da7ebf8a90b26e085a68fa2c55a (diff) | |
| download | qemu-446d306d23c8b568affec104d74f84f48d5eaa24.tar.gz | |
qcow2: make qcow2_encrypt_sectors encrypt in place
Instead of requiring separate input/output buffers for
encrypting data, change qcow2_encrypt_sectors() to assume
use of a single buffer, encrypting in place. The current
callers all used the same buffer for input/output already.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170623162419.26068-11-berrange@redhat.com
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'block/qcow2-cluster.c')
| -rw-r--r-- | block/qcow2-cluster.c | 17 |
1 files changed, 6 insertions, 11 deletions
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 3d341fd9cb..a570929eb6 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -358,11 +358,9 @@ static int count_contiguous_clusters_unallocated(int nb_clusters, } /* The crypt function is compatible with the linux cryptoloop - algorithm for < 4 GB images. NOTE: out_buf == in_buf is - supported */ + algorithm for < 4 GB images. */ int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num, - uint8_t *out_buf, const uint8_t *in_buf, - int nb_sectors, bool enc, + uint8_t *buf, int nb_sectors, bool enc, Error **errp) { union { @@ -382,14 +380,12 @@ int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num, } if (enc) { ret = qcrypto_cipher_encrypt(s->cipher, - in_buf, - out_buf, + buf, buf, 512, errp); } else { ret = qcrypto_cipher_decrypt(s->cipher, - in_buf, - out_buf, + buf, buf, 512, errp); } @@ -397,8 +393,7 @@ int qcow2_encrypt_sectors(BDRVQcow2State *s, int64_t sector_num, return -1; } sector_num++; - in_buf += 512; - out_buf += 512; + buf += 512; } return 0; } @@ -446,7 +441,7 @@ static bool coroutine_fn do_perform_cow_encrypt(BlockDriverState *bs, assert(s->cipher); assert((offset_in_cluster & ~BDRV_SECTOR_MASK) == 0); assert((bytes & ~BDRV_SECTOR_MASK) == 0); - if (qcow2_encrypt_sectors(s, sector, buffer, buffer, + if (qcow2_encrypt_sectors(s, sector, buffer, bytes >> BDRV_SECTOR_BITS, true, NULL) < 0) { return false; } |