diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2017-10-29 12:21:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-04 12:04:24 +0100 |
| commit | c9fe0f8fa4136c2451dcc012e48fbf4470d6b592 (patch) | |
| tree | 5e8ce5d0a106d970b061041158eba858af9a35e6 | |
| parent | 32946cc2d5686d320aab9fb162d8949c767f7519 (diff) | |
| download | linux-c9fe0f8fa4136c2451dcc012e48fbf4470d6b592.tar.bz2 | |
hyper-v: trace vmbus_on_msg_dpc()
Add tracing subsystem to Hyper-V VMBus module and add tracepoint
to vmbus_on_msg_dpc() which is called when we receive a message from host.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/hv/Makefile | 4 | ||||
| -rw-r--r-- | drivers/hv/hv_trace.c | 4 | ||||
| -rw-r--r-- | drivers/hv/hv_trace.h | 29 | ||||
| -rw-r--r-- | drivers/hv/hyperv_vmbus.h | 2 | ||||
| -rw-r--r-- | drivers/hv/vmbus_drv.c | 2 |
5 files changed, 40 insertions, 1 deletions
diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile index 39c9b2c08d33..ad791e00230f 100644 --- a/drivers/hv/Makefile +++ b/drivers/hv/Makefile @@ -2,7 +2,9 @@ obj-$(CONFIG_HYPERV) += hv_vmbus.o obj-$(CONFIG_HYPERV_UTILS) += hv_utils.o obj-$(CONFIG_HYPERV_BALLOON) += hv_balloon.o +CFLAGS_hv_trace.o = -I$(src) + hv_vmbus-y := vmbus_drv.o \ hv.o connection.o channel.o \ - channel_mgmt.o ring_buffer.o + channel_mgmt.o ring_buffer.o hv_trace.o hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_fcopy.o hv_utils_transport.o diff --git a/drivers/hv/hv_trace.c b/drivers/hv/hv_trace.c new file mode 100644 index 000000000000..df47acd01a81 --- /dev/null +++ b/drivers/hv/hv_trace.c @@ -0,0 +1,4 @@ +#include "hyperv_vmbus.h" + +#define CREATE_TRACE_POINTS +#include "hv_trace.h" diff --git a/drivers/hv/hv_trace.h b/drivers/hv/hv_trace.h new file mode 100644 index 000000000000..9c2772922c76 --- /dev/null +++ b/drivers/hv/hv_trace.h @@ -0,0 +1,29 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM hyperv + +#if !defined(_HV_TRACE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _HV_TRACE_H + +#include <linux/tracepoint.h> + +DECLARE_EVENT_CLASS(vmbus_hdr_msg, + TP_PROTO(const struct vmbus_channel_message_header *hdr), + TP_ARGS(hdr), + TP_STRUCT__entry(__field(unsigned int, msgtype)), + TP_fast_assign(__entry->msgtype = hdr->msgtype;), + TP_printk("msgtype=%u", __entry->msgtype) +); + +DEFINE_EVENT(vmbus_hdr_msg, vmbus_on_msg_dpc, + TP_PROTO(const struct vmbus_channel_message_header *hdr), + TP_ARGS(hdr) +); + +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE hv_trace +#endif /* _HV_TRACE_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index de6f01df9592..22300ec7b556 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -31,6 +31,8 @@ #include <linux/hyperv.h> #include <linux/interrupt.h> +#include "hv_trace.h" + /* * Timeout for services such as KVP and fcopy. */ diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 8fe13cd76acf..8f9293a87c6b 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -835,6 +835,8 @@ void vmbus_on_msg_dpc(unsigned long data) hdr = (struct vmbus_channel_message_header *)msg->u.payload; + trace_vmbus_on_msg_dpc(hdr); + if (hdr->msgtype >= CHANNELMSG_COUNT) { WARN_ONCE(1, "unknown msgtype=%d\n", hdr->msgtype); goto msg_handled; |