[libvirt] [PATCH] migration: convert speed from Mb/sec to bytes/sec in drive-mirror jobs

[Rudy Zhang]

Commit id '7b7600b3' added qemuMigrationDriveMirror to handle NBD
mirroring, but passed the migrate_speed listed in MiB/s to be used for
the mirror_speed which expects a bytes/s value.

This patch will convert the migrate_speed value to its mirror_speed
equivalent.

Signed-off-by: Rudy Zhang <rudyflyzhang at gmail.com>
---
 src/qemu/qemu_migration.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 8bc76bf..3d9a55f 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -2093,12 +2093,21 @@ qemuMigrationDriveMirror(virQEMUDriverPtr driver,
     char *diskAlias = NULL;
     char *nbd_dest = NULL;
     char *hoststr = NULL;
+    unsigned long long mirror_speed = speed;
     unsigned int mirror_flags = VIR_DOMAIN_BLOCK_REBASE_REUSE_EXT;
     int rv;
     virQEMUDriverConfigPtr cfg = virQEMUDriverGetConfig(driver);
 
     VIR_DEBUG("Starting drive mirrors for domain %s", vm->def->name);
 
+    if (mirror_speed > LLONG_MAX >> 20) {
+        virReportError(VIR_ERR_OVERFLOW,
+                       _("bandwidth must be less than %llu"),
+                       LLONG_MAX >> 20);
+        return ret;
+    }
+    mirror_speed <<= 20;
+
     /* steal NBD port and thus prevent its propagation back to destination */
     port = mig->nbd->port;
     mig->nbd->port = 0;
@@ -2136,7 +2145,7 @@ qemuMigrationDriveMirror(virQEMUDriverPtr driver,
         qemuBlockJobSyncBegin(disk);
         /* Force "raw" format for NBD export */
         mon_ret = qemuMonitorDriveMirror(priv->mon, diskAlias, nbd_dest,
-                                         "raw", speed, 0, 0, mirror_flags);
+                                         "raw", mirror_speed, 0, 0, mirror_flags);
         VIR_FREE(diskAlias);
         VIR_FREE(nbd_dest);
 
-- 
2.6.4