Patchwork [RFC,12/16,v8] support to cancel the current dumping

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Submitter Wen Congyang
Date March 2, 2012, 10:43 a.m.
Message ID <4F50A442.2040604@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/144210/
State New
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Comments

Wen Congyang - March 2, 2012, 10:43 a.m.
Add API to allow the user to cancel the current dumping.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 dump.c           |   12 ++++++++++++
 hmp-commands.hx  |   14 ++++++++++++++
 hmp.c            |    5 +++++
 hmp.h            |    1 +
 qapi-schema.json |   13 +++++++++++++
 qmp-commands.hx  |   21 +++++++++++++++++++++
 6 files changed, 66 insertions(+), 0 deletions(-)

Patch

diff --git a/dump.c b/dump.c
index 42e1681..dab0c84 100644
--- a/dump.c
+++ b/dump.c
@@ -712,3 +712,15 @@  void qmp_dump(bool paging, const char *file, Error **errp)
         error_set(errp, QERR_IO_ERROR);
     }
 }
+
+void qmp_dump_cancel(Error **errp)
+{
+    DumpState *s = dump_get_current();
+
+    if (s->state != DUMP_STATE_ACTIVE) {
+        return;
+    }
+
+    s->state = DUMP_STATE_CANCELLED;
+    dump_cleanup(s);
+}
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 9a1e696..63193ec 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -902,6 +902,20 @@  ETEXI
 #endif
 
     {
+        .name       = "dump_cancel",
+        .args_type  = "",
+        .params     = "",
+        .help       = "cancel the current VM dumping",
+        .mhandler.cmd = hmp_dump_cancel,
+    },
+
+STEXI
+@item dump_cancel
+@findex dump_cancel
+Cancel the current VM dumping.
+ETEXI
+
+    {
         .name       = "snapshot_blkdev",
         .args_type  = "device:B,snapshot-file:s?,format:s?",
         .params     = "device [new-image-file] [format]",
diff --git a/hmp.c b/hmp.c
index a27f6c5..d427e49 100644
--- a/hmp.c
+++ b/hmp.c
@@ -866,3 +866,8 @@  void hmp_dump(Monitor *mon, const QDict *qdict)
     qmp_dump(!!paging, file, &errp);
     hmp_handle_error(mon, &errp);
 }
+
+void hmp_dump_cancel(Monitor *mon, const QDict *qdict)
+{
+    qmp_dump_cancel(NULL);
+}
diff --git a/hmp.h b/hmp.h
index b055e50..75c6c1d 100644
--- a/hmp.h
+++ b/hmp.h
@@ -60,5 +60,6 @@  void hmp_block_stream(Monitor *mon, const QDict *qdict);
 void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict);
 void hmp_block_job_cancel(Monitor *mon, const QDict *qdict);
 void hmp_dump(Monitor *mon, const QDict *qdict);
+void hmp_dump_cancel(Monitor *mon, const QDict *qdict);
 
 #endif
diff --git a/qapi-schema.json b/qapi-schema.json
index 8b51b1d..d40ba69 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -1645,3 +1645,16 @@ 
 # Since: 1.1
 ##
 { 'command': 'dump', 'data': { 'paging': 'bool', 'file': 'str' } }
+
+##
+# @dump_cancel
+#
+# Cancel the current executing dumping process.
+#
+# Returns: nothing on success
+#
+# Notes: This command succeeds even if there is no dumping process running.
+#
+# Since: 1.1
+##
+{ 'command': 'dump_cancel' }
diff --git a/qmp-commands.hx b/qmp-commands.hx
index c877987..1b36262 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -621,6 +621,27 @@  EQMP
 #endif
 
     {
+        .name       = "dump_cancel",
+        .args_type  = "",
+        .mhandler.cmd_new = qmp_marshal_input_dump_cancel,
+    },
+
+SQMP
+dump_cancel
+
+
+Cancel the current dumping.
+
+Arguments: None.
+
+Example:
+
+-> { "execute": "dump_cancel" }
+<- { "return": {} }
+
+EQMP
+
+    {
         .name       = "netdev_add",
         .args_type  = "netdev:O",
         .params     = "[user|tap|socket],id=str[,prop=value][,...]",