From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 14 Apr 2016 19:41:15 +0000 (-0400)
Subject: Implement session statedump command
X-Git-Tag: v2.9.0-rc1~48
X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=601252cfa07fa29f15c769fe3f4cf4419311d6f9

Implement session statedump command

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/lttng-abi.c b/lttng-abi.c
index 4dd9273f..e193f437 100644
--- a/lttng-abi.c
+++ b/lttng-abi.c
@@ -569,6 +569,8 @@ long lttng_session_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		return lttng_session_list_tracker_pids(session);
 	case LTTNG_KERNEL_SESSION_METADATA_REGEN:
 		return lttng_session_metadata_regenerate(session);
+	case LTTNG_KERNEL_SESSION_STATEDUMP:
+		return lttng_session_statedump(session);
 	default:
 		return -ENOIOCTLCMD;
 	}
diff --git a/lttng-abi.h b/lttng-abi.h
index 9b9a2323..ff1520c3 100644
--- a/lttng-abi.h
+++ b/lttng-abi.h
@@ -204,6 +204,8 @@ struct lttng_kernel_filter_bytecode {
  */
 #define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS	_IO(0xF6, 0x58)
 #define LTTNG_KERNEL_SESSION_METADATA_REGEN	_IO(0xF6, 0x59)
+/* 0x5A and 0x5B are reserved for a future ABI-breaking cleanup. */
+#define LTTNG_KERNEL_SESSION_STATEDUMP		_IO(0xF6, 0x5C)
 
 /* Channel FD ioctl */
 #define LTTNG_KERNEL_STREAM			_IO(0xF6, 0x62)
diff --git a/lttng-events.c b/lttng-events.c
index 928886f3..bcf59da1 100644
--- a/lttng-events.c
+++ b/lttng-events.c
@@ -213,6 +213,16 @@ void lttng_session_destroy(struct lttng_session *session)
 	kfree(session);
 }
 
+int lttng_session_statedump(struct lttng_session *session)
+{
+	int ret;
+
+	mutex_lock(&sessions_mutex);
+	ret = lttng_statedump_start(session);
+	mutex_unlock(&sessions_mutex);
+	return ret;
+}
+
 int lttng_session_enable(struct lttng_session *session)
 {
 	int ret = 0;
diff --git a/lttng-events.h b/lttng-events.h
index 9c8f03b8..9e05e2f9 100644
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -533,6 +533,7 @@ int lttng_session_enable(struct lttng_session *session);
 int lttng_session_disable(struct lttng_session *session);
 void lttng_session_destroy(struct lttng_session *session);
 int lttng_session_metadata_regenerate(struct lttng_session *session);
+int lttng_session_statedump(struct lttng_session *session);
 void metadata_cache_destroy(struct kref *kref);
 
 struct lttng_channel *lttng_channel_create(struct lttng_session *session,