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virtio-console: Add some trace events 

Add some trace events for messages passed between the char layer and the
virtio-serial bus.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Amit Shah 2011-07-05 16:37:49 +05:30
parent 49e3fdd7f2
commit d02e4fa4a8
2 changed files with 13 additions and 1 deletions
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9
hw/virtio-console.c
View File

@ -12,6 +12,7 @@
#include "qemu-char.h"
#include "qemu-error.h"
#include "trace.h"
#include "virtio-serial.h"
typedef struct VirtConsole {
@ -24,8 +25,12 @@ typedef struct VirtConsole {
static ssize_t flush_buf(VirtIOSerialPort *port, const uint8_t *buf, size_t len)
{
VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
ssize_t ret;
return qemu_chr_write(vcon->chr, buf, len);
ret = qemu_chr_write(vcon->chr, buf, len);
trace_virtio_console_flush_buf(port->id, len, ret);
return ret;
}
/* Callback function that's called when the guest opens the port */
@ -57,6 +62,7 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
{
VirtConsole *vcon = opaque;
trace_virtio_console_chr_read(vcon->port.id, size);
virtio_serial_write(&vcon->port, buf, size);
}
@ -64,6 +70,7 @@ static void chr_event(void *opaque, int event)
{
VirtConsole *vcon = opaque;
trace_virtio_console_chr_event(vcon->port.id, event);
switch (event) {
case CHR_EVENT_OPENED:
virtio_serial_open(&vcon->port);

5
trace-events
View File

@ -52,6 +52,11 @@ disable virtio_serial_throttle_port(unsigned int port, bool throttle) "port %u,
disable virtio_serial_handle_control_message(uint16_t event, uint16_t value) "event %u, value %u"
disable virtio_serial_handle_control_message_port(unsigned int port) "port %u"
# hw/virtio-console.c
disable virtio_console_flush_buf(unsigned int port, size_t len, ssize_t ret) "port %u, in_len %zu, out_len %zd"
disable virtio_console_chr_read(unsigned int port, int size) "port %u, size %d"
disable virtio_console_chr_event(unsigned int port, int event) "port %u, event %d"
# block.c
disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d"