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2014-05-05Coverity: Fix failure path for qemu_accept in migrationDr. David Alan Gilbert1-6/+11
Coverity defects 1005733 & 1005734 complain about passing a negative value to closesocket in the error paths on incoming migration. Stash the error value and print it in the message (previously we gave no indication of the reason for the failure) Use error_report Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-08-22aio / timers: Untangle include filesAlex Bligh1-0/+1
include/qemu/timer.h has no need to include main-loop.h and doing so causes an issue for the next patch. Unfortunately various files assume including timers.h will pull in main-loop.h. Untangle this mess. Signed-off-by: Alex Bligh <alex@alex.org.uk> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2013-03-11migration: eliminate s->migration_filePaolo Bonzini1-2/+2
The indirection is useless now. Backends can open s->file directly. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-03-11migration: use QEMUFile for writing outgoing migration dataPaolo Bonzini1-12/+0
Second, drop the file descriptor indirection, and write directly to the QEMUFile. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-03-11migration: use QEMUFile for migration channel lifetimePaolo Bonzini1-16/+3
As a start, use QEMUFile to store the destination and close it. qemu_get_fd gets a file descriptor that will be used by the write callbacks. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-03-11qemu-file: add writable socket QEMUFilePaolo Bonzini1-1/+1
Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2012-12-20migration: make writes blockingJuan Quintela1-0/+1
Move all the writes to the migration_thread, and make writings blocking. Notice that are still using the iothread for everything that we do. Signed-off-by: Juan Quintela <quintela@redhat.com>
2012-12-20migration: include qemu-file.hJuan Quintela1-1/+1
They don't use/know anything about buffered-file. Signed-off-by: Juan Quintela <quintela@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19migration: move include files to include/migration/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19block: move include files to include/block/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19janitor: do not include qemu-char everywherePaolo Bonzini1-1/+0
Touching char/char.h basically causes the whole of QEMU to be rebuilt. Avoid this, it is usually unnecessary. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-02migration: move qemu_fclose to process_incoming_migrationPaolo Bonzini1-1/+0
The common suffix is now just process_incoming_migration. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-02migration: close socket QEMUFile from socket_closePaolo Bonzini1-0/+2
The common suffix now is process_incoming_migration+qemu_fclose. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-02migration: xxx_close will only be called oncePaolo Bonzini1-5/+2
No need to test s->fd again, it is tested in the caller. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-11-02migration: clean up server sockets and handlers before invoking ↵Paolo Bonzini1-4/+3
process_incoming_migration A first step towards making a common "suffix" for all migration protocols, and moving it to process_incoming_migration. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23migration (incoming): add error propagation to fd and exec protocolsPaolo Bonzini1-3/+2
And remove the superfluous integer return value. Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23migration (outgoing): add error propagation for all protocolsPaolo Bonzini1-9/+2
Error propagation is already there for socket backends. Add it to other protocols, simplifying code that tests for errors that will never happen. With all protocols understanding Error, the code can be simplified further by removing the return value. Unfortunately, the quality of error messages varies depending on where the error is detected, because no Error is passed to the NonBlockingConnectHandler. Thus, the exact error message still cannot be sent to the user if the OS reports it asynchronously via SO_ERROR. If NonBlockingConnectHandler received an Error**, we could for example report the error class and/or message via a new field of the query-migration command even if it is reported asynchronously. Before: (qemu) migrate fd:ffff migrate: An undefined error has occurred (qemu) info migrate (qemu) After: (qemu) migrate fd:ffff migrate: File descriptor named 'ffff' has not been found (qemu) info migrate capabilities: xbzrle: off Migration status: failed total time: 0 milliseconds Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23migration: use qemu-sockets to establish Unix socketsPaolo Bonzini1-77/+17
This makes migration-unix.c again a cut-and-paste job from migration-tcp.c, exactly as it was in the beginning. :) Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-10-23migration: centralize call to migrate_fd_error()Paolo Bonzini1-1/+0
The call to migrate_fd_error() was missing for non-socket backends, so centralize it in qmp_migrate(). Before: (qemu) migrate fd:ffff migrate: An undefined error has occurred (qemu) info migrate (qemu) After: (qemu) migrate fd:ffff migrate: An undefined error has occurred (qemu) info migrate capabilities: xbzrle: off Migration status: failed total time: 0 milliseconds (The awful error message will be fixed later in the series). Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-01-13prepare for future GPLv2+ relicensingPaolo Bonzini1-0/+2
All files under GPLv2 will get GPLv2+ changes starting tomorrow. event_notifier.c and exec-obsolete.h were only ever touched by Red Hat employees and can be relicensed now. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-12-12unix_close(): check for close() errors too (v2)Eduardo Habkost1-2/+5
In case close() fails, we want to report the error back. Changes v1 -> v2: - Use braces on if statement to match coding style Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: make migration-{tcp,unix} consistentJuan Quintela1-21/+25
Files are almost identical in functionality, just remove the differences that make no sense. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: propagate error correctlyJuan Quintela1-16/+10
unix and tcp outgoing migration have error values, but didn't returned it. Make them return the error. Notice that EINPROGRESS & EWOULDBLOCK are not considered errors as call will be retry later. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: Don't use callback on file defining itJuan Quintela1-3/+3
Signed-off-by: Juan Quintela <quintela@redhat.com>
2011-10-20migration: move migrate_new to do_migrateJuan Quintela1-15/+5
Once there, remove all parameters that don't need to be passed to *start_outgoing_migration() functions Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: Refactor MigrationState creationJuan Quintela1-14/+1
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: Rename FdMigrationState MigrationStateJuan Quintela1-6/+6
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: Fold MigrationState into FdMigrationStateJuan Quintela1-5/+5
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-20migration: Make *start_outgoing_migration return FdMigrationStateJuan Quintela1-2/+2
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2011-08-20Use glib memory allocation and free functionsAnthony Liguori1-2/+2
qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-04-15Remove unused sysemu.h include directivesBlue Swirl1-1/+0
Remove unused sysemu.h include directives to speed up build with the following patches. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-03-20Fix conversions from pointer to int and vice versaStefan Weil1-2/+2
Here the int values fds[0], sigfd, s, sock and fd are converted to void pointers which are later converted back to an int value. These conversions should always use intptr_t instead of unsigned long. They are needed for environments where sizeof(long) != sizeof(void *). Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-06-22Factorize common migration incoming codeJuan Quintela1-13/+2
Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-17migration: unix migration should obey autostart are the other onesJuan Quintela1-0/+2
This was the only incoming migration without autostart check Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-17migration: Clear fd also in error casesJuan Quintela1-3/+2
Not clearing the fd and closing the file makes qemu spin using 100%CPU after incoming migration error. See for instance bug: https://bugzilla.redhat.com/show_bug.cgi?id=518032 Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-07Do not use dprintfmalc1-10/+10
dprintf is already claimed by POSIX[1], and on at least one system is implemented as a macro [1] http://www.opengroup.org/onlinepubs/9699919799/functions/dprintf.html Signed-off-by: malc <av1474@comtv.ru>
2009-12-18Avoid permanently disabled QEMU monitor when UNIX migration failsDaniel P. Berrange1-5/+7
If a UNIX migration command is attempt to a UNIX socket which does not exist, then the monitor is suspended, but never resumed. This prevents any further use of the monitor * migration-unix.c: Only call migrate_fd_monitor_suspend() once connected to the UNIX socket. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-12-03Don't leak file descriptorsKevin Wolf1-3/+3
We're leaking file descriptors to child processes. Set FD_CLOEXEC on file descriptors that don't need to be passed to children to stop this misbehaviour. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-12-03live migration: Propagate output monitor to callback handlerJan Kiszka1-4/+6
In order to allow proper progress reporting to the monitor that initiated the migration, forward the monitor reference through the migration layer down to SaveLiveStateHandler. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-11-17Block live migrationlirans@il.ibm.com1-1/+6
This patch introduces block migration called during live migration. Block are being copied to the destination in an async way. First the code will transfer the whole disk and then transfer all dirty blocks accumulted during the migration. Still need to improve transition from the iterative phase of migration to the end phase. For now transition will take place when all blocks transfered once, all the dirty blocks will be transfered during the end phase (guest is suspended). Changes from v4: - Global variabels moved to a global state structure allocated dynamically. - Minor coding style issues. - Poll block.c for tracking of dirty blocks instead of manage it here. Signed-off-by: Liran Schour <lirans@il.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-08-24Migration via unix sockets.Chris Lalancette1-0/+216
Implement migration via unix sockets. While you can fake this using exec and netcat, this involves forking another process and is generally not very nice. By doing this directly in qemu, we can avoid the copy through the external nc command. This is useful for implementations (such as libvirt) that want to do "secure" migration; we pipe the data on the sending side into the unix socket, libvirt picks it up, encrypts it, and transports it, and then on the remote side libvirt decrypts it, dumps it to another unix socket, and feeds it into qemu. The implementation is straightforward and looks very similar to migration-exec.c and migration-tcp.c Signed-off-by: Chris Lalancette <clalance@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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