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Re: [Qemu-devel] [PATCH 02/18] Introduce read() to FdMigrationState.
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From: |
Daniel P. Berrange |
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Subject: |
Re: [Qemu-devel] [PATCH 02/18] Introduce read() to FdMigrationState. |
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Date: |
Thu, 10 Feb 2011 10:18:56 +0000 |
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User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Feb 10, 2011 at 10:54:01AM +0100, Anthony Liguori wrote:
> On 02/10/2011 10:30 AM, Yoshiaki Tamura wrote:
> >Currently FdMigrationState doesn't support read(), and this patch
> >introduces it to get response from the other side.
> >
> >Signed-off-by: Yoshiaki Tamura<address@hidden>
>
> Migration is unidirectional. Changing this is fundamental and not
> something to be done lightly.
Making it bi-directional might break libvirt's save/restore
to file support which uses migration, passing a unidirectional
FD for the file. It could also break libvirt's secure tunnelled
migration support which is currently only expecting to have
data sent in one direction on the socket.
Daniel
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- [Qemu-devel] [PATCH 00/18] Kemari for KVM v0.2.10, Yoshiaki Tamura, 2011/02/10
- [Qemu-devel] [PATCH 12/18] Insert event_tap_mmio() to cpu_physical_memory_rw() in exec.c., Yoshiaki Tamura, 2011/02/10
- [Qemu-devel] [PATCH 13/18] net: insert event-tap to qemu_send_packet() and qemu_sendv_packet_async()., Yoshiaki Tamura, 2011/02/10
- [Qemu-devel] [PATCH 01/18] Make QEMUFile buf expandable, and introduce qemu_realloc_buffer() and qemu_clear_buffer()., Yoshiaki Tamura, 2011/02/10
- [Qemu-devel] [PATCH 18/18] Introduce "kemari:" to enable FT migration mode (Kemari)., Yoshiaki Tamura, 2011/02/10
- [Qemu-devel] [PATCH 02/18] Introduce read() to FdMigrationState., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 08/18] savevm: introduce util functions to control ft_trans_file from savevm layer., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 03/18] Introduce skip_header parameter to qemu_loadvm_state()., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 16/18] migration: introduce migrate_ft_trans_{put, get}_ready(), and modify migrate_fd_put_ready() when ft_mode is on., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 17/18] migration-tcp: modify tcp_accept_incoming_migration() to handle ft_mode, and add a hack not to close fd when ft_mode is enabled., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 11/18] ioport: insert event_tap_ioport() to ioport_write()., Yoshiaki Tamura, 2011/02/10
[Qemu-devel] [PATCH 07/18] Introduce fault tolerant VM transaction QEMUFile and ft_mode., Yoshiaki Tamura, 2011/02/10