From 967e3889874b1116090a60c0cb43157130bdbd16 Mon Sep 17 00:00:00 2001 From: Fabiano Rosas Date: Thu, 12 Oct 2023 10:43:43 -0300 Subject: migration/multifd: Clarify Error usage in multifd_channel_connect MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The function is currently called from two sites, one always gives it a NULL Error and the other always gives it a non-NULL Error. In the non-NULL case, all it does it trace the error and return. One of the callers already have tracing, add a tracepoint to the other and stop passing the error into the function. Cc: Markus Armbruster Signed-off-by: Fabiano Rosas Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Juan Quintela Signed-off-by: Juan Quintela Message-ID: <20231012134343.23757-4-farosas@suse.de> --- migration/multifd.c | 60 +++++++++++++++++++++++--------------------------- migration/trace-events | 3 ++- 2 files changed, 30 insertions(+), 33 deletions(-) diff --git a/migration/multifd.c b/migration/multifd.c index c92955d..1fe53d3 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -775,7 +775,7 @@ out: static bool multifd_channel_connect(MultiFDSendParams *p, QIOChannel *ioc, - Error *error); + Error **errp); static void multifd_tls_outgoing_handshake(QIOTask *task, gpointer opaque) @@ -784,21 +784,22 @@ static void multifd_tls_outgoing_handshake(QIOTask *task, QIOChannel *ioc = QIO_CHANNEL(qio_task_get_source(task)); Error *err = NULL; - if (qio_task_propagate_error(task, &err)) { - trace_multifd_tls_outgoing_handshake_error(ioc, error_get_pretty(err)); - } else { + if (!qio_task_propagate_error(task, &err)) { trace_multifd_tls_outgoing_handshake_complete(ioc); + if (multifd_channel_connect(p, ioc, &err)) { + return; + } } - if (!multifd_channel_connect(p, ioc, err)) { - /* - * Error happen, mark multifd_send_thread status as 'quit' although it - * is not created, and then tell who pay attention to me. - */ - p->quit = true; - qemu_sem_post(&multifd_send_state->channels_ready); - qemu_sem_post(&p->sem_sync); - } + trace_multifd_tls_outgoing_handshake_error(ioc, error_get_pretty(err)); + + /* + * Error happen, mark multifd_send_thread status as 'quit' although it + * is not created, and then tell who pay attention to me. + */ + p->quit = true; + qemu_sem_post(&multifd_send_state->channels_ready); + qemu_sem_post(&p->sem_sync); } static void *multifd_tls_handshake_thread(void *opaque) @@ -814,7 +815,7 @@ static void *multifd_tls_handshake_thread(void *opaque) return NULL; } -static void multifd_tls_channel_connect(MultiFDSendParams *p, +static bool multifd_tls_channel_connect(MultiFDSendParams *p, QIOChannel *ioc, Error **errp) { @@ -824,7 +825,7 @@ static void multifd_tls_channel_connect(MultiFDSendParams *p, tioc = migration_tls_client_create(ioc, hostname, errp); if (!tioc) { - return; + return false; } object_unref(OBJECT(ioc)); @@ -834,31 +835,25 @@ static void multifd_tls_channel_connect(MultiFDSendParams *p, qemu_thread_create(&p->thread, "multifd-tls-handshake-worker", multifd_tls_handshake_thread, p, QEMU_THREAD_JOINABLE); + return true; } static bool multifd_channel_connect(MultiFDSendParams *p, QIOChannel *ioc, - Error *error) + Error **errp) { trace_multifd_set_outgoing_channel( ioc, object_get_typename(OBJECT(ioc)), - migrate_get_current()->hostname, error); + migrate_get_current()->hostname); - if (error) { - return false; - } if (migrate_channel_requires_tls_upgrade(ioc)) { - multifd_tls_channel_connect(p, ioc, &error); - if (!error) { - /* - * tls_channel_connect will call back to this - * function after the TLS handshake, - * so we mustn't call multifd_send_thread until then - */ - return true; - } else { - return false; - } + /* + * tls_channel_connect will call back to this + * function after the TLS handshake, + * so we mustn't call multifd_send_thread until then + */ + return multifd_tls_channel_connect(p, ioc, errp); + } else { migration_ioc_register_yank(ioc); p->registered_yank = true; @@ -897,11 +892,12 @@ static void multifd_new_send_channel_async(QIOTask *task, gpointer opaque) p->c = ioc; qio_channel_set_delay(p->c, false); p->running = true; - if (multifd_channel_connect(p, ioc, local_err)) { + if (multifd_channel_connect(p, ioc, &local_err)) { return; } } + trace_multifd_new_send_channel_async_error(p->id, local_err); multifd_new_send_channel_cleanup(p, ioc, local_err); } diff --git a/migration/trace-events b/migration/trace-events index 403cc1a..fa9486d 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -125,6 +125,7 @@ postcopy_preempt_reset_channel(void) "" # multifd.c multifd_new_send_channel_async(uint8_t id) "channel %u" +multifd_new_send_channel_async_error(uint8_t id, void *err) "channel=%u err=%p" multifd_recv(uint8_t id, uint64_t packet_num, uint32_t used, uint32_t flags, uint32_t next_packet_size) "channel %u packet_num %" PRIu64 " pages %u flags 0x%x next packet size %u" multifd_recv_new_channel(uint8_t id) "channel %u" multifd_recv_sync_main(long packet_num) "packet num %ld" @@ -144,7 +145,7 @@ multifd_send_thread_start(uint8_t id) "%u" multifd_tls_outgoing_handshake_start(void *ioc, void *tioc, const char *hostname) "ioc=%p tioc=%p hostname=%s" multifd_tls_outgoing_handshake_error(void *ioc, const char *err) "ioc=%p err=%s" multifd_tls_outgoing_handshake_complete(void *ioc) "ioc=%p" -multifd_set_outgoing_channel(void *ioc, const char *ioctype, const char *hostname, void *err) "ioc=%p ioctype=%s hostname=%s err=%p" +multifd_set_outgoing_channel(void *ioc, const char *ioctype, const char *hostname) "ioc=%p ioctype=%s hostname=%s" # migration.c await_return_path_close_on_source_close(void) "" -- cgit v1.1