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[Qemu-devel] [PATCH RFC v6 6/7] migration: fix some error handling
From: |
Fei Li |
Subject: |
[Qemu-devel] [PATCH RFC v6 6/7] migration: fix some error handling |
Date: |
Mon, 29 Oct 2018 20:58:17 +0800 |
Add error handling for qemu_ram_foreach_migratable_block() when
it fails.
Always call migrate_set_error() to set the error state without relying
on whether multifd_save_cleanup() succeeds. As the passed &local_err
is never used in multifd_save_cleanup(), remove it.
Signed-off-by: Fei Li <address@hidden>
---
migration/migration.c | 5 +----
migration/postcopy-ram.c | 3 +++
migration/ram.c | 7 +++----
migration/ram.h | 2 +-
4 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index 87dfc7374f..3b8b7ab4f9 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1377,7 +1377,6 @@ static void migrate_fd_cleanup(void *opaque)
qemu_savevm_state_cleanup();
if (s->to_dst_file) {
- Error *local_err = NULL;
QEMUFile *tmp;
trace_migrate_fd_cleanup();
@@ -1388,9 +1387,7 @@ static void migrate_fd_cleanup(void *opaque)
}
qemu_mutex_lock_iothread();
- if (multifd_save_cleanup(&local_err) != 0) {
- error_report_err(local_err);
- }
+ multifd_save_cleanup();
qemu_mutex_lock(&s->qemu_file_lock);
tmp = s->to_dst_file;
s->to_dst_file = NULL;
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index e5c02a32c5..4ca2bc02b3 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -1117,6 +1117,9 @@ int postcopy_ram_enable_notify(MigrationIncomingState
*mis)
/* Mark so that we get notified of accesses to unwritten areas */
if (qemu_ram_foreach_migratable_block(ram_block_enable_notify, mis)) {
+ error_report("ram_block_enable_notify failed");
+ close(mis->userfault_event_fd);
+ close(mis->userfault_fd);
return -1;
}
diff --git a/migration/ram.c b/migration/ram.c
index 8f03afe228..57cb1bee3d 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -922,7 +922,7 @@ static void multifd_send_terminate_threads(Error *err)
}
}
-int multifd_save_cleanup(Error **errp)
+int multifd_save_cleanup(void)
{
int i;
int ret = 0;
@@ -1082,9 +1082,8 @@ static void multifd_new_send_channel_async(QIOTask *task,
gpointer opaque)
if (qio_task_propagate_error(task, &local_err)) {
migrate_set_state(&s->state, s->state, MIGRATION_STATUS_FAILED);
- if (multifd_save_cleanup(&local_err) != 0) {
- migrate_set_error(migrate_get_current(), local_err);
- }
+ multifd_save_cleanup();
+ migrate_set_error(migrate_get_current(), local_err);
} else {
p->c = QIO_CHANNEL(sioc);
qio_channel_set_delay(p->c, false);
diff --git a/migration/ram.h b/migration/ram.h
index 046d3074be..0d1215209e 100644
--- a/migration/ram.h
+++ b/migration/ram.h
@@ -43,7 +43,7 @@ uint64_t ram_bytes_remaining(void);
uint64_t ram_bytes_total(void);
int multifd_save_setup(void);
-int multifd_save_cleanup(Error **errp);
+int multifd_save_cleanup(void);
int multifd_load_setup(void);
int multifd_load_cleanup(Error **errp);
bool multifd_recv_all_channels_created(void);
--
2.13.7
[Qemu-devel] [PATCH RFC v6 4/7] migration: fix some segmentation faults when using multifd, Fei Li, 2018/10/29
[Qemu-devel] [PATCH RFC v6 6/7] migration: fix some error handling,
Fei Li <=
[Qemu-devel] [PATCH RFC v6 7/7] qemu_thread_create: propagate the error to callers to handle, Fei Li, 2018/10/29