bwlp/qemu.git - Experimental fork of QEMU with video encoding patches

	Commit message (Collapse)	Author	Age	Files	Lines
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*	quorum: Add quorum mechanism.	Benoît Canet	2014-02-21	1	-1/+390
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	This patchset enables the core of the quorum mechanism. The num_children reads are compared to get the majority version and if this version exists more than threshold times the guest won't see the error at all. If a block is corrupted or if an error occurs during an IO or if the quorum cannot be established QMP events are used to report to the management. Use gnutls's SHA-256 to compare versions. --enable-quorum must be used to enable the feature. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
*	quorum: Add quorum_aio_readv.	Benoît Canet	2014-02-21	1	-1/+38
\| \| \| \| \| \| \| \| \|	Add code to do num_children reads in parallel and cleanup the structures afterwards. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
*	quorum: Add quorum_aio_writev and its dependencies.	Benoît Canet	2014-02-21	1	-0/+103
\| \| \| \| \| \| \| \|	Writes are mirrored num_children times on num_children devices. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
*	quorum: Create BDRVQuorumState and BlkDriver and do init.	Benoît Canet	2014-02-21	1	-0/+31
\| \| \| \| \| \| \| \| \|	Create the structure holding the quorum settings and write the minimal block driver instanciation boilerplate. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
*	quorum: Create quorum.c, add QuorumChildRequest and QuorumAIOCB.	Benoît Canet	2014-02-21	1	-0/+53
	Quorum is a block filter mirroring writes to num_children children. For reads quorum reads each children and does a vote. If more than vote_threshold versions are identical the quorum is reached and this winning version is returned to the guest. So quorum prevents bit corruption. For high availability purpose minority errors are reported via QMP but the guest does not see them. This patch creates the driver C source file and introduces the structures that will be used in asynchronous reads and writes. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>