[Qemu-devel] [RFC PATCH RDMA support v5: 08/12] new capabilities added and check for QMP string 'rdma'

[mrhines]

From: "Michael R. Hines" <mrhi...@us.ibm.com>

1. capability for zero pages (enabled by default)
2. capability for dynamic server chunk registration (disabled by default)

Signed-off-by: Michael R. Hines <mrhi...@us.ibm.com>
---
 migration.c |   41 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/migration.c b/migration.c
index 3b4b467..f01efa9 100644
--- a/migration.c
+++ b/migration.c
@@ -15,6 +15,7 @@
 
 #include "qemu-common.h"
 #include "migration/migration.h"
+#include "migration/rdma.h"
 #include "monitor/monitor.h"
 #include "migration/qemu-file.h"
 #include "sysemu/sysemu.h"
@@ -68,6 +69,18 @@ MigrationState *migrate_get_current(void)
         .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
     };
 
+    static bool first_time = 1;
+
+    /*
+     * Historically, checking for zeros is enabled
+     * by default. Require the user to disable it
+     * (for example RDMA), if they really want to.
+     */
+    if(first_time) {
+        
current_migration.enabled_capabilities[MIGRATION_CAPABILITY_CHECK_FOR_ZERO] = 
true;
+        first_time = 0;
+    }
+
     return &current_migration;
 }
 
@@ -77,6 +90,8 @@ void qemu_start_incoming_migration(const char *uri, Error 
**errp)
 
     if (strstart(uri, "tcp:", &p))
         tcp_start_incoming_migration(p, errp);
+    else if (strstart(uri, "rdma:", &p))
+        rdma_start_incoming_migration(p, errp);
 #if !defined(WIN32)
     else if (strstart(uri, "exec:", &p))
         exec_start_incoming_migration(p, errp);
@@ -120,7 +135,6 @@ void process_incoming_migration(QEMUFile *f)
     Coroutine *co = qemu_coroutine_create(process_incoming_migration_co);
     int fd = qemu_get_fd(f);
 
-    assert(fd != -1);
     qemu_set_nonblock(fd);
     qemu_coroutine_enter(co, f);
 }
@@ -405,6 +419,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
 
     if (strstart(uri, "tcp:", &p)) {
         tcp_start_outgoing_migration(s, p, &local_err);
+    } else if (strstart(uri, "rdma:", &p)) {
+        rdma_start_outgoing_migration(s, p, &local_err);
 #if !defined(WIN32)
     } else if (strstart(uri, "exec:", &p)) {
         exec_start_outgoing_migration(s, p, &local_err);
@@ -474,6 +490,24 @@ void qmp_migrate_set_downtime(double value, Error **errp)
     max_downtime = (uint64_t)value;
 }
 
+bool migrate_chunk_register_destination(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return 
s->enabled_capabilities[MIGRATION_CAPABILITY_CHUNK_REGISTER_DESTINATION];
+}
+
+bool migrate_check_for_zero(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->enabled_capabilities[MIGRATION_CAPABILITY_CHECK_FOR_ZERO];
+}
+
 int migrate_use_xbzrle(void)
 {
     MigrationState *s;
@@ -546,8 +580,9 @@ static void *migration_thread(void *opaque)
             max_size = bandwidth * migrate_max_downtime() / 1000000;
 
             DPRINTF("transferred %" PRIu64 " time_spent %" PRIu64
-                    " bandwidth %g max_size %" PRId64 "\n",
-                    transferred_bytes, time_spent, bandwidth, max_size);
+                    " bandwidth %g (%0.2f mbps) max_size %" PRId64 "\n",
+                    transferred_bytes, time_spent, 
+                    bandwidth, Mbps(transferred_bytes, time_spent), max_size);
             /* if we haven't sent anything, we don't want to recalculate
                10000 is a small enough number for our purposes */
             if (s->dirty_bytes_rate && transferred_bytes > 10000) {
-- 
1.7.10.4