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* migration: fix the multifd code when receiving less channelsFei Li2019-01-231-5/+6
| | | | | | | | | | | | | | | | | | | In our current code, when multifd is used during migration, if there is an error before the destination receives all new channels, the source keeps running, however the destination does not exit but keeps waiting until the source is killed deliberately. Fix this by dumping the specific error and let users decide whether to quit from the destination side when failing to receive packet via some channel. And update the comment for multifd_recv_new_channel(). Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Peter Xu <peterx@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Signed-off-by: Fei Li <fli@suse.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-Id: <20190113140849.38339-3-lifei1214@126.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* Migration+TLS: Fix crash due to double cleanupDr. David Alan Gilbert2018-05-151-0/+9
| | | | | | | | | | | | | | | | | | | | During a TLS connect we see: migration_channel_connect calls migration_tls_channel_connect (calls after TLS setup) migration_channel_connect My previous error handling fix made migration_channel_connect call migrate_fd_connect in all cases; unfortunately the above means it gets called twice and crashes doing double cleanup. Fixes: 688a3dcba98 Reported-by: Peter Krempa <pkrempa@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20180430185943.35714-1-dgilbert@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
* migration: introduce lock for to_dst_filePeter Xu2018-05-151-1/+2
| | | | | | | | | | Let's introduce a lock for that QEMUFile since we are going to operate on it in multiple threads. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180502104740.12123-23-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
* migration: Route errors down through migration_channel_connectDr. David Alan Gilbert2018-02-061-16/+16
| | | | | | | | | | | Route async errors (especially from sockets) down through migration_channel_connect and on to migrate_fd_connect where they can be cleaned up. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* migration: Allow migrate_fd_connect to take an Error *Dr. David Alan Gilbert2018-02-061-1/+1
| | | | | | | | | | | | | Allow whatever is performing the connection to pass migrate_fd_connect an error to indicate there was a problem during connection, an allow us to clean up. The caller must free the error. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* migration: Add comments to channel functionsJuan Quintela2017-09-221-0/+15
| | | | | Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
* migration: Create migration_ioc_process_incoming()Juan Quintela2017-09-221-2/+1Star
| | | | | | | | | | | | | We pass the ioc instead of the fd. This will allow us to have more than one channel open. We also make sure that we set the from_src_file sooner, so we don't need to pass it as a parameter. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Daniel P. Berrange <berrange@redhat.com> -- Do not assing mis->from_src_file (peterxu)
* migration: Move migration.h to migration/Juan Quintela2017-06-131-1/+1
| | | | | | | | | Nothing uses it outside of migration.h Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
* migration: Remove MigrationState from migration_channel_incomming()Juan Quintela2017-06-131-2/+3
| | | | | | | | | All callers were calling migrate_get_current(), so do it inside the function. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
* migration: Export tls.c functions in its own fileJuan Quintela2017-06-011-0/+1
| | | | | | | | | Just for the functions exported from tls.c. Notice that we can't remove the migration/migration.h include from tls.c because it access directly MigrationState for the tls params. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* migration: Export qemu-file-channel.c functions in its own fileJuan Quintela2017-05-181-0/+1
| | | | | Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* migration: Split migration/channel.c for channel operationsJuan Quintela2017-05-181-0/+66
Create an include for its exported functions. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> --- Add proper header