[libvirt] [PATCH v3 03/11] qemu: enter interruptlible state where appropriate

[Nikolay Shirokovskiy]

This is just places where async job drops vm lock besides
for the purpose of sending command to qemu process. If I fail
to identify one of these places it is not a big problem - vm will
be unresponsive to queries etc sometimes and someone who cares
report this issue and we fix it ))

NB: Now there are some known places were enter/exit are not yet added
as noted in the cover letter. These are end/begin of migration phases.
---
 src/qemu/qemu_domain.c    |  2 ++
 src/qemu/qemu_driver.c    |  2 +-
 src/qemu/qemu_migration.c | 18 +++++++-----------
 src/qemu/qemu_process.c   |  2 ++
 4 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 21b8c8d..f8602b7 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -4872,6 +4872,7 @@ void qemuDomainObjEnterRemote(virDomainObjPtr obj)
 {
     VIR_DEBUG("Entering remote (vm=%p name=%s)",
               obj, obj->def->name);
+    qemuDomainObjEnterInterruptible(obj);
     virObjectUnlock(obj);
 }
 
@@ -4880,6 +4881,7 @@ void qemuDomainObjExitRemote(virDomainObjPtr obj)
     virObjectLock(obj);
     VIR_DEBUG("Exited remote (vm=%p name=%s)",
               obj, obj->def->name);
+    qemuDomainObjExitInterruptible(obj);
 }
 
 
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 6132bc4..019ec33 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -16768,7 +16768,7 @@ qemuDomainBlockJobAbort(virDomainPtr dom,
         qemuDomainDiskPrivatePtr diskPriv = QEMU_DOMAIN_DISK_PRIVATE(disk);
         qemuBlockJobUpdate(driver, vm, QEMU_ASYNC_JOB_NONE, disk);
         while (diskPriv->blockjob) {
-            if (virDomainObjWait(vm) < 0) {
+            if (qemuDomainObjWait(vm) < 0) {
                 ret = -1;
                 goto endjob;
             }
diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
index 69eb231..6082a5f 100644
--- a/src/qemu/qemu_migration.c
+++ b/src/qemu/qemu_migration.c
@@ -840,7 +840,7 @@ qemuMigrationCancelDriveMirror(virQEMUDriverPtr driver,
         if (failed && !err)
             err = virSaveLastError();
 
-        if (virDomainObjWait(vm) < 0)
+        if (qemuDomainObjWait(vm) < 0)
             goto cleanup;
     }
 
@@ -979,7 +979,7 @@ qemuMigrationDriveMirror(virQEMUDriverPtr driver,
             goto cleanup;
         }
 
-        if (virDomainObjWait(vm) < 0)
+        if (qemuDomainObjWait(vm) < 0)
             goto cleanup;
     }
 
@@ -1335,7 +1335,7 @@ qemuMigrationWaitForSpice(virDomainObjPtr vm)
 
     VIR_DEBUG("Waiting for SPICE to finish migration");
     while (!priv->job.spiceMigrated && !priv->job.abortJob) {
-        if (virDomainObjWait(vm) < 0)
+        if (qemuDomainObjWait(vm) < 0)
             return -1;
     }
     return 0;
@@ -1603,17 +1603,13 @@ qemuMigrationWaitForCompletion(virQEMUDriverPtr driver,
             return rv;
 
         if (events) {
-            if (virDomainObjWait(vm) < 0) {
+            if (qemuDomainObjWait(vm) < 0) {
                 jobInfo->status = QEMU_DOMAIN_JOB_STATUS_FAILED;
                 return -2;
             }
         } else {
             /* Poll every 50ms for progress & to allow cancellation */
-            struct timespec ts = { .tv_sec = 0, .tv_nsec = 50 * 1000 * 1000ull };
-
-            virObjectUnlock(vm);
-            nanosleep(&ts, NULL);
-            virObjectLock(vm);
+            qemuDomainObjSleep(vm, 50 * 1000 * 1000ul);
         }
     }
 
@@ -1654,7 +1650,7 @@ qemuMigrationWaitForDestCompletion(virQEMUDriverPtr driver,
 
     while ((rv = qemuMigrationCompleted(driver, vm, asyncJob,
                                         NULL, flags)) != 1) {
-        if (rv < 0 || virDomainObjWait(vm) < 0)
+        if (rv < 0 || qemuDomainObjWait(vm) < 0)
             return -1;
     }
 
@@ -3910,7 +3906,7 @@ qemuMigrationRun(virQEMUDriverPtr driver,
     if (priv->monJSON) {
         while (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
             priv->signalStop = true;
-            rc = virDomainObjWait(vm);
+            rc = qemuDomainObjWait(vm);
             priv->signalStop = false;
             if (rc < 0)
                 goto error;
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 18dd3aa..24b7ba1 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -229,6 +229,7 @@ qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm)
      * deleted while the agent is active */
     virObjectRef(vm);
 
+    qemuDomainObjEnterInterruptible(vm);
     virObjectUnlock(vm);
 
     agent = qemuAgentOpen(vm,
@@ -236,6 +237,7 @@ qemuConnectAgent(virQEMUDriverPtr driver, virDomainObjPtr vm)
                           &agentCallbacks);
 
     virObjectLock(vm);
+    qemuDomainObjExitInterruptible(vm);
 
     if (agent == NULL)
         virObjectUnref(vm);
-- 
1.8.3.1