112 lines
4.2 KiB
Diff
112 lines
4.2 KiB
Diff
From a1f2a51d1a789c46e806adb332236ca16d538bf9 Mon Sep 17 00:00:00 2001
|
|
From: Eric Blake <eblake@redhat.com>
|
|
Date: Tue, 2 May 2023 15:52:12 -0500
|
|
Subject: [PATCH 3/5] migration: Attempt disk reactivation in more failure
|
|
scenarios
|
|
|
|
RH-Author: Eric Blake <eblake@redhat.com>
|
|
RH-MergeRequest: 273: migration: prevent source core dump if NFS dies mid-migration
|
|
RH-Bugzilla: 2177957
|
|
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
|
|
RH-Acked-by: quintela1 <quintela@redhat.com>
|
|
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
|
|
RH-Commit: [3/3] e84bf1e7233c0273ca3136ecaa6b2cfc9c0efacb (ebblake/qemu-kvm)
|
|
|
|
Commit fe904ea824 added a fail_inactivate label, which tries to
|
|
reactivate disks on the source after a failure while s->state ==
|
|
MIGRATION_STATUS_ACTIVE, but didn't actually use the label if
|
|
qemu_savevm_state_complete_precopy() failed. This failure to
|
|
reactivate is also present in commit 6039dd5b1c (also covering the new
|
|
s->state == MIGRATION_STATUS_DEVICE state) and 403d18ae (ensuring
|
|
s->block_inactive is set more reliably).
|
|
|
|
Consolidate the two labels back into one - no matter HOW migration is
|
|
failed, if there is any chance we can reach vm_start() after having
|
|
attempted inactivation, it is essential that we have tried to restart
|
|
disks before then. This also makes the cleanup more like
|
|
migrate_fd_cancel().
|
|
|
|
Suggested-by: Kevin Wolf <kwolf@redhat.com>
|
|
Signed-off-by: Eric Blake <eblake@redhat.com>
|
|
Message-Id: <20230502205212.134680-1-eblake@redhat.com>
|
|
Acked-by: Peter Xu <peterx@redhat.com>
|
|
Reviewed-by: Juan Quintela <quintela@redhat.com>
|
|
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
|
|
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
|
|
(cherry picked from commit 6dab4c93ecfae48e2e67b984d1032c1e988d3005)
|
|
[eblake: downstream migrate_colo() => migrate_colo_enabled()]
|
|
Signed-off-by: Eric Blake <eblake@redhat.com>
|
|
---
|
|
migration/migration.c | 24 ++++++++++++++----------
|
|
1 file changed, 14 insertions(+), 10 deletions(-)
|
|
|
|
diff --git a/migration/migration.c b/migration/migration.c
|
|
index 6ba8eb0fdf..817170d52d 100644
|
|
--- a/migration/migration.c
|
|
+++ b/migration/migration.c
|
|
@@ -3255,6 +3255,11 @@ static void migration_completion(MigrationState *s)
|
|
MIGRATION_STATUS_DEVICE);
|
|
}
|
|
if (ret >= 0) {
|
|
+ /*
|
|
+ * Inactivate disks except in COLO, and track that we
|
|
+ * have done so in order to remember to reactivate
|
|
+ * them if migration fails or is cancelled.
|
|
+ */
|
|
s->block_inactive = !migrate_colo_enabled();
|
|
qemu_file_set_rate_limit(s->to_dst_file, INT64_MAX);
|
|
ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false,
|
|
@@ -3290,13 +3295,13 @@ static void migration_completion(MigrationState *s)
|
|
rp_error = await_return_path_close_on_source(s);
|
|
trace_migration_return_path_end_after(rp_error);
|
|
if (rp_error) {
|
|
- goto fail_invalidate;
|
|
+ goto fail;
|
|
}
|
|
}
|
|
|
|
if (qemu_file_get_error(s->to_dst_file)) {
|
|
trace_migration_completion_file_err();
|
|
- goto fail_invalidate;
|
|
+ goto fail;
|
|
}
|
|
|
|
if (!migrate_colo_enabled()) {
|
|
@@ -3306,26 +3311,25 @@ static void migration_completion(MigrationState *s)
|
|
|
|
return;
|
|
|
|
-fail_invalidate:
|
|
- /* If not doing postcopy, vm_start() will be called: let's regain
|
|
- * control on images.
|
|
- */
|
|
- if (s->state == MIGRATION_STATUS_ACTIVE ||
|
|
- s->state == MIGRATION_STATUS_DEVICE) {
|
|
+fail:
|
|
+ if (s->block_inactive && (s->state == MIGRATION_STATUS_ACTIVE ||
|
|
+ s->state == MIGRATION_STATUS_DEVICE)) {
|
|
+ /*
|
|
+ * If not doing postcopy, vm_start() will be called: let's
|
|
+ * regain control on images.
|
|
+ */
|
|
Error *local_err = NULL;
|
|
|
|
qemu_mutex_lock_iothread();
|
|
bdrv_invalidate_cache_all(&local_err);
|
|
if (local_err) {
|
|
error_report_err(local_err);
|
|
- s->block_inactive = true;
|
|
} else {
|
|
s->block_inactive = false;
|
|
}
|
|
qemu_mutex_unlock_iothread();
|
|
}
|
|
|
|
-fail:
|
|
migrate_set_state(&s->state, current_active_state,
|
|
MIGRATION_STATUS_FAILED);
|
|
}
|
|
--
|
|
2.39.1
|
|
|