3 Commits

Author	SHA1	Message	Date
Anthony Liguori	7267c0947d	Use glib memory allocation and free functions ... qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>	2011-08-20 23:01:08 -05:00
Anthony Liguori	21df65b644	qed: Add support for zero clusters ... Zero clusters are similar to unallocated clusters except instead of reading their value from a backing file when one is available, the cluster is always read as zero. This implements read support only. At this stage, QED will never write a zero cluster. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>	2011-04-13 12:06:41 +02:00
Stefan Hajnoczi	298800cae7	qed: Table, L2 cache, and cluster functions ... This patch adds code to look up data cluster offsets in the image via the L1/L2 tables. The L2 tables are writethrough cached in memory for performance (each read/write requires a lookup so it is essential to cache the tables). With cluster lookup code in place it is possible to implement bdrv_is_allocated() to query the number of contiguous allocated/unallocated clusters. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>	2010-12-17 16:11:04 +01:00