[PATCH v4 12/18] migration/rdma: Create the multifd send channels for RDMA

[Chuan Zheng]

Signed-off-by: Chuan Zheng <zhengch...@huawei.com>
---
 migration/multifd.c |  4 ++--
 migration/multifd.h |  2 ++
 migration/rdma.c    | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/migration/multifd.c b/migration/multifd.c
index ae0b7f0..919a414 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -176,7 +176,7 @@ void multifd_register_ops(int method, MultiFDMethods *ops)
     multifd_ops[method] = ops;
 }
 
-static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp)
+int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp)
 {
     MultiFDInit_t msg = {};
     int ret;
@@ -503,7 +503,7 @@ int multifd_queue_page(QEMUFile *f, RAMBlock *block, 
ram_addr_t offset)
     return 1;
 }
 
-static void multifd_send_terminate_threads(Error *err)
+void multifd_send_terminate_threads(Error *err)
 {
     int i;
 
diff --git a/migration/multifd.h b/migration/multifd.h
index b17a2c1..26d4489 100644
--- a/migration/multifd.h
+++ b/migration/multifd.h
@@ -184,6 +184,8 @@ typedef struct {
 #ifdef CONFIG_RDMA
 extern MultiFDSetup multifd_rdma_ops;
 #endif
+void multifd_send_terminate_threads(Error *err);
+int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp);
 int get_multifd_send_param(int id, MultiFDSendParams **param);
 int get_multifd_recv_param(int id, MultiFDRecvParams **param);
 MultiFDSetup *multifd_setup_ops_init(void);
diff --git a/migration/rdma.c b/migration/rdma.c
index 9654b87..cff9446 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -4261,9 +4261,54 @@ err:
     g_free(rdma_return_path);
 }
 
+static int multifd_channel_rdma_connect(void *opaque)
+{
+    MultiFDSendParams *p = opaque;
+    Error *local_err = NULL;
+    int ret = 0;
+    MigrationState *s = migrate_get_current();
+
+    p->rdma = qemu_rdma_data_init(s->host_port, &local_err);
+    if (p->rdma == NULL) {
+        goto out;
+    }
+
+    ret = qemu_rdma_source_init(p->rdma,
+                                migrate_rdma_pin_all(),
+                                &local_err);
+    if (ret) {
+        goto out;
+    }
+
+    ret = qemu_rdma_connect(p->rdma, &local_err);
+    if (ret) {
+        goto out;
+    }
+
+    p->file = qemu_fopen_rdma(p->rdma, "wb");
+    if (p->file == NULL) {
+        goto out;
+    }
+
+    p->c = QIO_CHANNEL(getQIOChannel(p->file));
+
+out:
+    if (local_err) {
+        trace_multifd_send_error(p->id);
+    }
+
+    return ret;
+}
+
 static void *multifd_rdma_send_thread(void *opaque)
 {
     MultiFDSendParams *p = opaque;
+    Error *local_err = NULL;
+
+    trace_multifd_send_thread_start(p->id);
+    if (multifd_send_initial_packet(p, &local_err) < 0) {
+        goto out;
+    }
 
     while (true) {
         WITH_QEMU_LOCK_GUARD(&p->mutex) {
@@ -4274,6 +4319,12 @@ static void *multifd_rdma_send_thread(void *opaque)
         qemu_sem_wait(&p->sem);
     }
 
+out:
+    if (local_err) {
+        trace_multifd_send_error(p->id);
+        multifd_send_terminate_threads(local_err);
+    }
+
     WITH_QEMU_LOCK_GUARD(&p->mutex) {
         p->running = false;
     }
@@ -4285,6 +4336,12 @@ static void 
multifd_rdma_send_channel_setup(MultiFDSendParams *p)
 {
     Error *local_err = NULL;
 
+    if (multifd_channel_rdma_connect(p)) {
+        error_setg(&local_err, "multifd: rdma channel %d not established",
+                   p->id);
+        return ;
+    }
+
     if (p->quit) {
         error_setg(&local_err, "multifd: send id %d already quit", p->id);
         return ;
-- 
1.8.3.1