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[PULL 15/18] migration: Move channel setup out of postcopy_try_recover()
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PULL 15/18] migration: Move channel setup out of postcopy_try_recover() |
Date: |
Thu, 21 Apr 2022 19:40:49 +0100 |
From: Peter Xu <peterx@redhat.com>
We used to use postcopy_try_recover() to replace migration_incoming_setup() to
setup incoming channels. That's fine for the old world, but in the new world
there can be more than one channels that need setup. Better move the channel
setup out of it so that postcopy_try_recover() only handles the last phase of
switching to the recovery phase.
To do that in migration_fd_process_incoming(), move the postcopy_try_recover()
call to be after migration_incoming_setup(), which will setup the channels.
While in migration_ioc_process_incoming(), postpone the recover() routine right
before we'll jump into migration_incoming_process().
A side benefit is we don't need to pass in QEMUFile* to postcopy_try_recover()
anymore. Remove it.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20220331150857.74406-7-peterx@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
migration/migration.c | 23 +++++++++++------------
1 file changed, 11 insertions(+), 12 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index d86fb0c332..b1659b7092 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -671,19 +671,20 @@ void migration_incoming_process(void)
}
/* Returns true if recovered from a paused migration, otherwise false */
-static bool postcopy_try_recover(QEMUFile *f)
+static bool postcopy_try_recover(void)
{
MigrationIncomingState *mis = migration_incoming_get_current();
if (mis->state == MIGRATION_STATUS_POSTCOPY_PAUSED) {
/* Resumed from a paused postcopy migration */
- mis->from_src_file = f;
+ /* This should be set already in migration_incoming_setup() */
+ assert(mis->from_src_file);
/* Postcopy has standalone thread to do vm load */
- qemu_file_set_blocking(f, true);
+ qemu_file_set_blocking(mis->from_src_file, true);
/* Re-configure the return path */
- mis->to_src_file = qemu_file_get_return_path(f);
+ mis->to_src_file = qemu_file_get_return_path(mis->from_src_file);
migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_PAUSED,
MIGRATION_STATUS_POSTCOPY_RECOVER);
@@ -704,11 +705,10 @@ static bool postcopy_try_recover(QEMUFile *f)
void migration_fd_process_incoming(QEMUFile *f, Error **errp)
{
- if (postcopy_try_recover(f)) {
+ if (!migration_incoming_setup(f, errp)) {
return;
}
-
- if (!migration_incoming_setup(f, errp)) {
+ if (postcopy_try_recover()) {
return;
}
migration_incoming_process();
@@ -724,11 +724,6 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error
**errp)
/* The first connection (multifd may have multiple) */
QEMUFile *f = qemu_fopen_channel_input(ioc);
- /* If it's a recovery, we're done */
- if (postcopy_try_recover(f)) {
- return;
- }
-
if (!migration_incoming_setup(f, errp)) {
return;
}
@@ -749,6 +744,10 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error
**errp)
}
if (start_migration) {
+ /* If it's a recovery, we're done */
+ if (postcopy_try_recover()) {
+ return;
+ }
migration_incoming_process();
}
}
--
2.35.1
- [PULL 15/18] migration: Move channel setup out of postcopy_try_recover(), (continued)
- [PULL 15/18] migration: Move channel setup out of postcopy_try_recover(), Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 17/18] migration: Fix operator type, Dr. David Alan Gilbert (git), 2022/04/21
- Re: [PULL 00/18] migration queue, Dr. David Alan Gilbert, 2022/04/21
- [PULL 00/18] migration queue, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 04/18] migration: fix use of TLS PSK credentials with a UNIX socket, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 05/18] tests: switch MigrateStart struct to be stack allocated, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 01/18] tests: improve error message when saving TLS PSK file fails, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 08/18] tests: switch migration FD passing test to use common precopy helper, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 02/18] tests: support QTEST_TRACE env variable, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 10/18] migration: Postpone releasing MigrationState.hostname, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 15/18] migration: Move channel setup out of postcopy_try_recover(),
Dr. David Alan Gilbert (git) <=
- [PULL 14/18] migration: Export ram_load_postcopy(), Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 16/18] migration: Allow migrate-recover to run multiple times, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 09/18] tests: expand the migration precopy helper to support failures, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 07/18] tests: introduce ability to provide hooks for migration precopy test, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 06/18] tests: merge code for UNIX and TCP migration pre-copy tests, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 03/18] tests: print newline after QMP response in qtest logs, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 11/18] migration: Drop multifd tls_hostname cache, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 13/18] migration: Move migrate_allow_multifd and helpers into migration.c, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 18/18] migration: Read state once, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 12/18] migration: Add pss.postcopy_requested status, Dr. David Alan Gilbert (git), 2022/04/21