From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:51057) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TOW43-00046D-81 for qemu-devel@nongnu.org; Wed, 17 Oct 2012 12:01:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TOW3o-0003Ci-3o for qemu-devel@nongnu.org; Wed, 17 Oct 2012 12:01:41 -0400 Received: from nodalink.pck.nerim.net ([62.212.105.220]:48806 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TOW3n-0003CW-Rs for qemu-devel@nongnu.org; Wed, 17 Oct 2012 12:01:32 -0400 From: =?UTF-8?q?Beno=C3=AEt=20Canet?= Date: Wed, 17 Oct 2012 18:00:18 +0200 Message-Id: <1350489629-1838-10-git-send-email-benoit@irqsave.net> In-Reply-To: <1350489629-1838-1-git-send-email-benoit@irqsave.net> References: <1350489629-1838-1-git-send-email-benoit@irqsave.net> Subject: [Qemu-devel] [RFC V2 09/20] qcow2: Add qcow2_co_load_dedup_hashes. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com This coroutine load all the hashes in the red black tree at startup. --- block/qcow2-dedup.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ block/qcow2.h | 1 + 2 files changed, 45 insertions(+) diff --git a/block/qcow2-dedup.c b/block/qcow2-dedup.c index c626720..a2f6657 100644 --- a/block/qcow2-dedup.c +++ b/block/qcow2-dedup.c @@ -634,3 +634,47 @@ int qcow2_dedup_write_new_hashes(BlockDriverState *bs, fail: return ret; } + +/* + * This coroutine load the deduplication hashes in the red black tree + * + * @data: the given BlockDriverState + * @ret: NULL + */ +void coroutine_fn qcow2_co_load_dedup_hashes(void *opaque) +{ + BlockDriverState *bs = opaque; + BDRVQcowState *s = bs->opaque; + int ret; + uint8_t *hash = NULL; + uint8_t null_hash[HASH_LENGTH]; + uint64_t max_cluster_offset, i; + int nb_hash_in_dedup_cluster = s->cluster_size / HASH_LENGTH; + + /* prepare the null hash */ + memset(null_hash, 0, HASH_LENGTH); + + max_cluster_offset = s->dedup_table_size * nb_hash_in_dedup_cluster; + + for (i = 0; i < max_cluster_offset; i++) { + /* get the hash */ + qemu_co_mutex_lock(&s->lock); + ret = qcow2_dedup_read_write_hash(bs, &hash, + i * s->cluster_sectors, + false); + qemu_co_mutex_unlock(&s->lock); + if (ret < 0) { + error_report("Failed to load deduplication hash."); + } + + /* if the hash is not null load it into red black tree */ + if (memcmp(hash, null_hash, HASH_LENGTH)) { + qemu_co_mutex_lock(&s->lock); + qcow2_dedup_insert_hash_in_rb_tree(bs, hash, + i * s->cluster_sectors); + qemu_co_mutex_unlock(&s->lock); + } else { + free(hash); + } + } +} diff --git a/block/qcow2.h b/block/qcow2.h index 58aee77..5bab6e2 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -375,5 +375,6 @@ int qcow2_dedup(BlockDriverState *bs, int qcow2_dedup_write_new_hashes(BlockDriverState *bs, uint64_t cluster_offset, int count); +void coroutine_fn qcow2_co_load_dedup_hashes(void *opaque); #endif -- 1.7.10.4