aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorPaolo Bonzini <pbonzini@redhat.com>2012-10-18 16:49:21 +0200
committerKevin Wolf <kwolf@redhat.com>2012-10-24 10:26:19 +0200
commitaeae883baf2377b714a41529f94905046fa058f3 (patch)
treec62538f24a70deb5abebbcca2589cdd30d375738
parent65f4632243f526958aa1f6b3911add98329c3796 (diff)
block: add block-job-complete
While streaming can be dropped as soon as it progressed through the whole image, mirroring needs to be completed manually for two reasons: 1) so that management knows exactly when the VM switches to the target; 2) because for other use cases such as replication, we may leave the operation running for the whole life of the virtual machine. Add a new block job command that manually completes background operations. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
-rw-r--r--blockdev.c13
-rw-r--r--blockjob.c10
-rw-r--r--blockjob.h15
-rw-r--r--hmp-commands.hx17
-rw-r--r--hmp.c10
-rw-r--r--hmp.h1
-rw-r--r--qapi-schema.json25
-rw-r--r--qerror.h3
-rw-r--r--qmp-commands.hx5
-rw-r--r--trace-events1
10 files changed, 99 insertions, 1 deletions
diff --git a/blockdev.c b/blockdev.c
index 46e4bbd8d9..02d3e0b698 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1266,6 +1266,19 @@ void qmp_block_job_resume(const char *device, Error **errp)
block_job_resume(job);
}
+void qmp_block_job_complete(const char *device, Error **errp)
+{
+ BlockJob *job = find_block_job(device);
+
+ if (!job) {
+ error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
+ return;
+ }
+
+ trace_qmp_block_job_complete(job);
+ block_job_complete(job, errp);
+}
+
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
{
BlockJobInfoList **prev = opaque;
diff --git a/blockjob.c b/blockjob.c
index b5c16f3766..c93a0e0187 100644
--- a/blockjob.c
+++ b/blockjob.c
@@ -99,6 +99,16 @@ void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp)
job->speed = speed;
}
+void block_job_complete(BlockJob *job, Error **errp)
+{
+ if (job->paused || job->cancelled || !job->job_type->complete) {
+ error_set(errp, QERR_BLOCK_JOB_NOT_READY, job->bs->device_name);
+ return;
+ }
+
+ job->job_type->complete(job, errp);
+}
+
void block_job_pause(BlockJob *job)
{
job->paused = true;
diff --git a/blockjob.h b/blockjob.h
index c2261a91f4..c44e2ea57b 100644
--- a/blockjob.h
+++ b/blockjob.h
@@ -41,6 +41,12 @@ typedef struct BlockJobType {
/** Optional callback for job types that support setting a speed limit */
void (*set_speed)(BlockJob *job, int64_t speed, Error **errp);
+
+ /**
+ * Optional callback for job types whose completion must be triggered
+ * manually.
+ */
+ void (*complete)(BlockJob *job, Error **errp);
} BlockJobType;
/**
@@ -164,6 +170,15 @@ void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp);
void block_job_cancel(BlockJob *job);
/**
+ * block_job_complete:
+ * @job: The job to be completed.
+ * @errp: Error object.
+ *
+ * Asynchronously complete the specified job.
+ */
+void block_job_complete(BlockJob *job, Error **errp);
+
+/**
* block_job_is_cancelled:
* @job: The job being queried.
*
diff --git a/hmp-commands.hx b/hmp-commands.hx
index e0b537d0cc..fb2f2372c0 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -109,7 +109,22 @@ ETEXI
STEXI
@item block_job_cancel
@findex block_job_cancel
-Stop an active block streaming operation.
+Stop an active background block operation (streaming, mirroring).
+ETEXI
+
+ {
+ .name = "block_job_complete",
+ .args_type = "device:B",
+ .params = "device",
+ .help = "stop an active background block operation",
+ .mhandler.cmd = hmp_block_job_complete,
+ },
+
+STEXI
+@item block_job_complete
+@findex block_job_complete
+Manually trigger completion of an active background block operation.
+For mirroring, this will switch the device to the destination path.
ETEXI
{
diff --git a/hmp.c b/hmp.c
index 2b979826ee..574517a17f 100644
--- a/hmp.c
+++ b/hmp.c
@@ -990,6 +990,16 @@ void hmp_block_job_resume(Monitor *mon, const QDict *qdict)
hmp_handle_error(mon, &error);
}
+void hmp_block_job_complete(Monitor *mon, const QDict *qdict)
+{
+ Error *error = NULL;
+ const char *device = qdict_get_str(qdict, "device");
+
+ qmp_block_job_complete(device, &error);
+
+ hmp_handle_error(mon, &error);
+}
+
typedef struct MigrationStatus
{
QEMUTimer *timer;
diff --git a/hmp.h b/hmp.h
index 71ea384523..7bdd23c23f 100644
--- a/hmp.h
+++ b/hmp.h
@@ -66,6 +66,7 @@ void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict);
void hmp_block_job_cancel(Monitor *mon, const QDict *qdict);
void hmp_block_job_pause(Monitor *mon, const QDict *qdict);
void hmp_block_job_resume(Monitor *mon, const QDict *qdict);
+void hmp_block_job_complete(Monitor *mon, const QDict *qdict);
void hmp_migrate(Monitor *mon, const QDict *qdict);
void hmp_device_del(Monitor *mon, const QDict *qdict);
void hmp_dump_guest_memory(Monitor *mon, const QDict *qdict);
diff --git a/qapi-schema.json b/qapi-schema.json
index dfcbb674af..9482976943 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -2033,6 +2033,31 @@
{ 'command': 'block-job-resume', 'data': { 'device': 'str' } }
##
+# @block-job-complete:
+#
+# Manually trigger completion of an active background block operation. This
+# is supported for drive mirroring, where it also switches the device to
+# write to the target path only.
+#
+# This command completes an active background block operation synchronously.
+# The ordering of this command's return with the BLOCK_JOB_COMPLETED event
+# is not defined. Note that if an I/O error occurs during the processing of
+# this command: 1) the command itself will fail; 2) the error will be processed
+# according to the rerror/werror arguments that were specified when starting
+# the operation.
+#
+# A cancelled or paused job cannot be completed.
+#
+# @device: the device name
+#
+# Returns: Nothing on success
+# If no background operation is active on this device, DeviceNotActive
+#
+# Since: 1.3
+##
+{ 'command': 'block-job-complete', 'data': { 'device': 'str' } }
+
+##
# @ObjectTypeInfo:
#
# This structure describes a search result from @qom-list-types
diff --git a/qerror.h b/qerror.h
index c91708cc3c..dacac52cf4 100644
--- a/qerror.h
+++ b/qerror.h
@@ -54,6 +54,9 @@ void assert_no_error(Error *err);
#define QERR_BLOCK_JOB_PAUSED \
ERROR_CLASS_GENERIC_ERROR, "The block job for device '%s' is currently paused"
+#define QERR_BLOCK_JOB_NOT_READY \
+ ERROR_CLASS_GENERIC_ERROR, "The active block job for device '%s' cannot be completed"
+
#define QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED \
ERROR_CLASS_GENERIC_ERROR, "Block format '%s' used by device '%s' does not support feature '%s'"
diff --git a/qmp-commands.hx b/qmp-commands.hx
index 5ba8c48cb4..4f9c711585 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -843,6 +843,11 @@ EQMP
.mhandler.cmd_new = qmp_marshal_input_block_job_resume,
},
{
+ .name = "block-job-complete",
+ .args_type = "device:B",
+ .mhandler.cmd_new = qmp_marshal_input_block_job_complete,
+ },
+ {
.name = "transaction",
.args_type = "actions:q",
.mhandler.cmd_new = qmp_marshal_input_transaction,
diff --git a/trace-events b/trace-events
index e2d4580d4c..9ab8e2781a 100644
--- a/trace-events
+++ b/trace-events
@@ -81,6 +81,7 @@ commit_start(void *bs, void *base, void *top, void *s, void *co, void *opaque) "
qmp_block_job_cancel(void *job) "job %p"
qmp_block_job_pause(void *job) "job %p"
qmp_block_job_resume(void *job) "job %p"
+qmp_block_job_complete(void *job) "job %p"
block_job_cb(void *bs, void *job, int ret) "bs %p job %p ret %d"
qmp_block_stream(void *bs, void *job) "bs %p job %p"