Helper to say if we are doing a migration over rdma.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20230509120700.78359-2-quintela@redhat.com>
---
 migration/migration.h | 3 +++
 migration/options.h   | 1 +
 migration/migration.c | 1 +
 migration/options.c   | 7 +++++++
 migration/rdma.c      | 4 +++-
 5 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/migration/migration.h b/migration/migration.h
index 30c3e97635..7359572012 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -440,6 +440,9 @@ struct MigrationState {
 
     /* QEMU_VM_VMDESCRIPTION content filled for all non-iterable devices. */
     JSONWriter *vmdesc;
+
+    /* Is this a rdma migration */
+    bool rdma_migration;
 };
 
 void migrate_set_state(int *state, int old_state, int new_state);
diff --git a/migration/options.h b/migration/options.h
index 45991af3c2..33a6bae93c 100644
--- a/migration/options.h
+++ b/migration/options.h
@@ -54,6 +54,7 @@ bool migrate_zero_copy_send(void);
 
 bool migrate_multifd_flush_after_each_section(void);
 bool migrate_postcopy(void);
+bool migrate_rdma(void);
 bool migrate_tls(void);
 
 /* capabilities helpers */
diff --git a/migration/migration.c b/migration/migration.c
index 7c3425c6fe..31d30a2ac5 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1405,6 +1405,7 @@ void migrate_init(MigrationState *s)
     s->vm_old_state = -1;
     s->iteration_initial_bytes = 0;
     s->threshold_size = 0;
+    s->rdma_migration = false;
 }
 
 int migrate_add_blocker_internal(Error *reason, Error **errp)
diff --git a/migration/options.c b/migration/options.c
index b62ab30cd5..4b99811197 100644
--- a/migration/options.c
+++ b/migration/options.c
@@ -350,6 +350,13 @@ bool migrate_postcopy(void)
     return migrate_postcopy_ram() || migrate_dirty_bitmaps();
 }
 
+bool migrate_rdma(void)
+{
+    MigrationState *s = migrate_get_current();
+
+    return s->rdma_migration;
+}
+
 bool migrate_tls(void)
 {
     MigrationState *s = migrate_get_current();
diff --git a/migration/rdma.c b/migration/rdma.c
index 12d3c23fdc..c11863e614 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -4122,6 +4122,7 @@ void rdma_start_incoming_migration(const char *host_port, Error **errp)
     int ret;
     RDMAContext *rdma;
     Error *local_err = NULL;
+    MigrationState *s = migrate_get_current();
 
     trace_rdma_start_incoming_migration();
 
@@ -4152,7 +4153,7 @@ void rdma_start_incoming_migration(const char *host_port, Error **errp)
     }
 
     trace_rdma_start_incoming_migration_after_rdma_listen();
-
+    s->rdma_migration = true;
     qemu_set_fd_handler(rdma->channel->fd, rdma_accept_incoming_migration,
                         NULL, (void *)(intptr_t)rdma);
     return;
@@ -4228,6 +4229,7 @@ void rdma_start_outgoing_migration(void *opaque,
 
     trace_rdma_start_outgoing_migration_after_rdma_connect();
 
+    s->rdma_migration = true;
     s->to_dst_file = qemu_fopen_rdma(rdma, "wb");
     migrate_fd_connect(s, NULL);
     return;
-- 
2.40.1