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migration: Introduce migrate_has_error()

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Introduce a helper to detect whether MigrationState.error is set for
whatever reason.

This is preparation work for any thread (e.g. source return path thread) to
setup errors in an unified way to MigrationState, rather than relying on
its own way to set errors (mark_source_rp_bad()).

Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231004220240.167175-3-peterx@redhat.com>
This commit is contained in:
Peter Xu 2023-10-04 18:02:32 -04:00 committed by Juan Quintela
parent c94143e587
commit 2b2f6f411e
2 changed files with 8 additions and 0 deletions
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7
migration/migration.c
View file

@ -1234,6 +1234,13 @@ void migrate_set_error(MigrationState *s, const Error *error)
}
}
bool migrate_has_error(MigrationState *s)
{
/* The lock is not helpful here, but still follow the rule */
QEMU_LOCK_GUARD(&s->error_mutex);
return qatomic_read(&s->error);
}
static void migrate_error_free(MigrationState *s)
{
QEMU_LOCK_GUARD(&s->error_mutex);

1
migration/migration.h
View file

@ -476,6 +476,7 @@ bool migration_has_all_channels(void);
uint64_t migrate_max_downtime(void);
void migrate_set_error(MigrationState *s, const Error *error);
bool migrate_has_error(MigrationState *s);
void migrate_fd_connect(MigrationState *s, Error *error_in);