[PATCH 3/4] backup: Add new qemu monitor bitmap

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The upcoming virDomainBackup() API needs to take advantage of various
qcow2 bitmap manipulations as the basis to virDomainCheckpoints and
incremental backups.  Add four functions to expose
block-dirty-bitmap-{add,enable,disable,merge} (this is the
recently-added QEMU_CAPS_BITMAP_MERGE capability).

Signed-off-by: Eric Blake <eblake@xxxxxxxxxx>
---
 src/qemu/qemu_monitor.h      |  19 ++++++
 src/qemu/qemu_monitor_json.h |  17 +++++
 src/qemu/qemu_monitor.c      |  51 +++++++++++++++
 src/qemu/qemu_monitor_json.c | 119 +++++++++++++++++++++++++++++++++++
 4 files changed, 206 insertions(+)

diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index fa84ff821e..30474c325d 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -646,6 +646,25 @@ int qemuMonitorSetBalloon(qemuMonitorPtr mon,
                           unsigned long long newmem);
 int qemuMonitorSetCPU(qemuMonitorPtr mon, int cpu, bool online);

+int qemuMonitorAddBitmap(qemuMonitorPtr mon,
+                         const char *node,
+                         const char *bitmap,
+                         bool persistent)
+    ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
+int qemuMonitorEnableBitmap(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *bitmap)
+    ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
+int qemuMonitorMergeBitmaps(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *dst,
+                            virJSONValuePtr *src)
+    ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3) ATTRIBUTE_NONNULL(4);
+int qemuMonitorDeleteBitmap(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *bitmap)
+    ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
+

 /* XXX should we pass the virDomainDiskDefPtr instead
  * and hide dev_name details inside monitor. Reconsider
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index e41bdc8c4f..8f92e6de35 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -580,5 +580,22 @@ int
 qemuMonitorJSONGetCurrentMachineInfo(qemuMonitorPtr mon,
                                      qemuMonitorCurrentMachineInfoPtr info)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+int qemuMonitorJSONAddBitmap(qemuMonitorPtr mon,
+                             const char *node,
+                             const char *bitmap,
+                             bool persistent);
+
+int qemuMonitorJSONEnableBitmap(qemuMonitorPtr mon,
+                                const char *node,
+                                const char *bitmap);
+
+int qemuMonitorJSONMergeBitmaps(qemuMonitorPtr mon,
+                                const char *node,
+                                const char *dst,
+                                virJSONValuePtr *src);
+
+int qemuMonitorJSONDeleteBitmap(qemuMonitorPtr mon,
+                                const char *node,
+                                const char *bitmap);

 #endif /* LIBVIRT_QEMU_MONITOR_JSON_H */
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 187513a986..a371f7d425 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -4488,3 +4488,54 @@ qemuMonitorGetCurrentMachineInfo(qemuMonitorPtr mon,

     return qemuMonitorJSONGetCurrentMachineInfo(mon, info);
 }
+
+
+int
+qemuMonitorAddBitmap(qemuMonitorPtr mon,
+                     const char *node,
+                     const char *bitmap,
+                     bool persistent)
+{
+    VIR_DEBUG("node=%s bitmap=%s persistent=%d", node, bitmap, persistent);
+
+    QEMU_CHECK_MONITOR(mon);
+
+    return qemuMonitorJSONAddBitmap(mon, node, bitmap, persistent);
+}
+
+int
+qemuMonitorEnableBitmap(qemuMonitorPtr mon,
+                        const char *node,
+                        const char *bitmap)
+{
+    VIR_DEBUG("node=%s bitmap=%s", node, bitmap);
+
+    QEMU_CHECK_MONITOR(mon);
+
+    return qemuMonitorJSONEnableBitmap(mon, node, bitmap);
+}
+
+int
+qemuMonitorMergeBitmaps(qemuMonitorPtr mon,
+                        const char *node,
+                        const char *dst,
+                        virJSONValuePtr *src)
+{
+    VIR_DEBUG("node=%s dst=%s", node, dst);
+
+    QEMU_CHECK_MONITOR(mon);
+
+    return qemuMonitorJSONMergeBitmaps(mon, node, dst, src);
+}
+
+int
+qemuMonitorDeleteBitmap(qemuMonitorPtr mon,
+                        const char *node,
+                        const char *bitmap)
+{
+    VIR_DEBUG("node=%s bitmap=%s", node, bitmap);
+
+    QEMU_CHECK_MONITOR(mon);
+
+    return qemuMonitorJSONDeleteBitmap(mon, node, bitmap);
+}
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 93113d4e8a..41eef0c38c 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -8510,3 +8510,122 @@ qemuMonitorJSONGetCurrentMachineInfo(qemuMonitorPtr mon,
     virJSONValueFree(reply);
     return ret;
 }
+
+
+int
+qemuMonitorJSONAddBitmap(qemuMonitorPtr mon,
+                         const char *node,
+                         const char *bitmap,
+                         bool persistent)
+{
+    int ret = -1;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+
+    if (!(cmd = qemuMonitorJSONMakeCommand("block-dirty-bitmap-add",
+                                           "s:node", node,
+                                           "s:name", bitmap,
+                                           "b:persistent", persistent,
+                                           NULL)))
+        return -1;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    ret = 0;
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
+
+int
+qemuMonitorJSONEnableBitmap(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *bitmap)
+{
+    int ret = -1;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+
+    if (!(cmd = qemuMonitorJSONMakeCommand("block-dirty-bitmap-enable",
+                                           "s:node", node,
+                                           "s:name", bitmap,
+                                           NULL)))
+        return -1;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    ret = 0;
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
+
+int
+qemuMonitorJSONMergeBitmaps(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *dst,
+                            virJSONValuePtr *src)
+{
+    int ret = -1;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+
+    if (!(cmd = qemuMonitorJSONMakeCommand("block-dirty-bitmap-merge",
+                                           "s:node", node,
+                                           "s:target", dst,
+                                           "a:bitmaps", src,
+                                           NULL)))
+        goto cleanup;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    ret = 0;
+ cleanup:
+    virJSONValueFree(*src);
+    *src = NULL;
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
+
+int
+qemuMonitorJSONDeleteBitmap(qemuMonitorPtr mon,
+                            const char *node,
+                            const char *bitmap)
+{
+    int ret = -1;
+    virJSONValuePtr cmd;
+    virJSONValuePtr reply = NULL;
+
+    if (!(cmd = qemuMonitorJSONMakeCommand("block-dirty-bitmap-remove",
+                                           "s:node", node,
+                                           "s:name", bitmap,
+                                           NULL)))
+        return -1;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    ret = 0;
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
-- 
2.20.1

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