chardev: Use QEMUChrEvent enum in IOEventHandler typedef

The Chardev events are listed in the QEMUChrEvent enum.

By using the enum in the IOEventHandler typedef we:

- make the IOEventHandler type more explicit (this handler
  process out-of-band information, while the IOReadHandler
  is in-band),
- help static code analyzers.

This patch was produced with the following spatch script:

  @match@
  expression backend, opaque, context, set_open;
  identifier fd_can_read, fd_read, fd_event, be_change;
  @@
  qemu_chr_fe_set_handlers(backend, fd_can_read, fd_read, fd_event,
                           be_change, opaque, context, set_open);

  @Depends on match@
  identifier opaque, event;
  identifier match.fd_event;
  @@
   static
  -void fd_event(void *opaque, int event)
  +void fd_event(void *opaque, QEMUChrEvent event)
   {
   ...
   }

Then the typedef was modified manually in
include/chardev/char-fe.h.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Corey Minyard <cminyard@mvista.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20191218172009.8868-15-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

backends/cryptodev-vhost-user.c

@@ -152,7 +152,7 @@ cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s,
     return chr;
 }
 
-static void cryptodev_vhost_user_event(void *opaque, int event)
+static void cryptodev_vhost_user_event(void *opaque, QEMUChrEvent event)
 {
     CryptoDevBackendVhostUser *s = opaque;
     CryptoDevBackend *b = CRYPTODEV_BACKEND(s);

chardev/char-mux.c

@@ -247,7 +247,7 @@ void mux_chr_send_all_event(Chardev *chr, QEMUChrEvent event)
     }
 }
 
-static void mux_chr_event(void *opaque, int event)
+static void mux_chr_event(void *opaque, QEMUChrEvent event)
 {
     mux_chr_send_all_event(CHARDEV(opaque), event);
 }

gdbstub.c

@@ -3171,7 +3171,7 @@ static void gdb_chr_receive(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void gdb_chr_event(void *opaque, int event)
+static void gdb_chr_event(void *opaque, QEMUChrEvent event)
 {
     int i;
     GDBState *s = (GDBState *) opaque;

hw/arm/pxa2xx.c

@@ -1955,7 +1955,7 @@ static void pxa2xx_fir_rx(void *opaque, const uint8_t *buf, int size)
     pxa2xx_fir_update(s);
 }
 
-static void pxa2xx_fir_event(void *opaque, int event)
+static void pxa2xx_fir_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/arm/strongarm.c

@@ -1093,7 +1093,7 @@ static void strongarm_uart_receive(void *opaque, const uint8_t *buf, int size)
     strongarm_uart_update_int_status(s);
 }
 
-static void strongarm_uart_event(void *opaque, int event)
+static void strongarm_uart_event(void *opaque, QEMUChrEvent event)
 {
     StrongARMUARTState *s = opaque;
     if (event == CHR_EVENT_BREAK) {

hw/block/vhost-user-blk.c

@@ -361,7 +361,7 @@ static gboolean vhost_user_blk_watch(GIOChannel *chan, GIOCondition cond,
     return true;
 }
 
-static void vhost_user_blk_event(void *opaque, int event)
+static void vhost_user_blk_event(void *opaque, QEMUChrEvent event)
 {
     DeviceState *dev = opaque;
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);

hw/char/cadence_uart.c

@@ -348,7 +348,7 @@ static void uart_receive(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
     CadenceUARTState *s = opaque;
     uint8_t buf = '\0';

hw/char/digic-uart.c

@@ -131,7 +131,7 @@ static void uart_rx(void *opaque, const uint8_t *buf, int size)
     s->reg_rx = *buf;
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/char/escc.c

@@ -634,7 +634,7 @@ static void serial_receive1(void *opaque, const uint8_t *buf, int size)
     serial_receive_byte(s, buf[0]);
 }
 
-static void serial_event(void *opaque, int event)
+static void serial_event(void *opaque, QEMUChrEvent event)
 {
     ESCCChannelState *s = opaque;
     if (event == CHR_EVENT_BREAK)

hw/char/etraxfs_ser.c

@@ -202,7 +202,7 @@ static int serial_can_receive(void *opaque)
     return sizeof(s->rx_fifo) - s->rx_fifo_len;
 }
 
-static void serial_event(void *opaque, int event)
+static void serial_event(void *opaque, QEMUChrEvent event)
 {
 
 }

hw/char/exynos4210_uart.c

@@ -528,7 +528,7 @@ static void exynos4210_uart_receive(void *opaque, const uint8_t *buf, int size)
 }
 
 
-static void exynos4210_uart_event(void *opaque, int event)
+static void exynos4210_uart_event(void *opaque, QEMUChrEvent event)
 {
     Exynos4210UartState *s = (Exynos4210UartState *)opaque;
 

hw/char/grlib_apbuart.c

@@ -155,7 +155,7 @@ static void grlib_apbuart_receive(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void grlib_apbuart_event(void *opaque, int event)
+static void grlib_apbuart_event(void *opaque, QEMUChrEvent event)
 {
     trace_grlib_apbuart_event(event);
 }

hw/char/imx_serial.c

@@ -323,7 +323,7 @@ static void imx_receive(void *opaque, const uint8_t *buf, int size)
     imx_put_data(opaque, *buf);
 }
 
-static void imx_event(void *opaque, int event)
+static void imx_event(void *opaque, QEMUChrEvent event)
 {
     if (event == CHR_EVENT_BREAK) {
         imx_put_data(opaque, URXD_BRK | URXD_FRMERR | URXD_ERR);

hw/char/ipoctal232.c

@@ -503,7 +503,7 @@ static void hostdev_receive(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void hostdev_event(void *opaque, int event)
+static void hostdev_event(void *opaque, QEMUChrEvent event)
 {
     SCC2698Channel *ch = opaque;
     switch (event) {

hw/char/lm32_juart.c

@@ -104,7 +104,7 @@ static int juart_can_rx(void *opaque)
     return !(s->jrx & JRX_FULL);
 }
 
-static void juart_event(void *opaque, int event)
+static void juart_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/char/lm32_uart.c

@@ -235,7 +235,7 @@ static int uart_can_rx(void *opaque)
     return !(s->regs[R_LSR] & LSR_DR);
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/char/mcf_uart.c

@@ -256,7 +256,7 @@ static void mcf_uart_push_byte(mcf_uart_state *s, uint8_t data)
     mcf_uart_update(s);
 }
 
-static void mcf_uart_event(void *opaque, int event)
+static void mcf_uart_event(void *opaque, QEMUChrEvent event)
 {
     mcf_uart_state *s = (mcf_uart_state *)opaque;
 

hw/char/milkymist-uart.c

@@ -180,7 +180,7 @@ static int uart_can_rx(void *opaque)
     return !(s->regs[R_STAT] & STAT_RX_EVT);
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/char/nrf51_uart.c

@@ -245,7 +245,7 @@ static int uart_can_receive(void *opaque)
     return s->rx_started ? (UART_FIFO_LENGTH - s->rx_fifo_len) : 0;
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
     NRF51UARTState *s = NRF51_UART(opaque);
 

hw/char/pl011.c

@@ -280,7 +280,7 @@ static void pl011_receive(void *opaque, const uint8_t *buf, int size)
     pl011_put_fifo(opaque, *buf);
 }
 
-static void pl011_event(void *opaque, int event)
+static void pl011_event(void *opaque, QEMUChrEvent event)
 {
     if (event == CHR_EVENT_BREAK)
         pl011_put_fifo(opaque, 0x400);

hw/char/serial.c

@@ -634,7 +634,7 @@ static void serial_receive1(void *opaque, const uint8_t *buf, int size)
     serial_update_irq(s);
 }
 
-static void serial_event(void *opaque, int event)
+static void serial_event(void *opaque, QEMUChrEvent event)
 {
     SerialState *s = opaque;
     DPRINTF("event %x\n", event);

hw/char/sh_serial.c

@@ -358,7 +358,7 @@ static void sh_serial_receive1(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void sh_serial_event(void *opaque, int event)
+static void sh_serial_event(void *opaque, QEMUChrEvent event)
 {
     sh_serial_state *s = opaque;
     if (event == CHR_EVENT_BREAK)

hw/char/terminal3270.c

@@ -142,7 +142,7 @@ static void terminal_read(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void chr_event(void *opaque, int event)
+static void chr_event(void *opaque, QEMUChrEvent event)
 {
     Terminal3270 *t = opaque;
     CcwDevice *ccw_dev = CCW_DEVICE(t);

hw/char/virtio-console.c

@@ -145,7 +145,7 @@ static void chr_read(void *opaque, const uint8_t *buf, int size)
     virtio_serial_write(port, buf, size);
 }
 
-static void chr_event(void *opaque, int event)
+static void chr_event(void *opaque, QEMUChrEvent event)
 {
     VirtConsole *vcon = opaque;
     VirtIOSerialPort *port = VIRTIO_SERIAL_PORT(vcon);

hw/char/xilinx_uartlite.c

@@ -206,7 +206,7 @@ static int uart_can_rx(void *opaque)
     return s->rx_fifo_len < sizeof(s->rx_fifo);
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
 
 }

hw/ipmi/ipmi_bmc_extern.c

@@ -379,7 +379,7 @@ static void receive(void *opaque, const uint8_t *buf, int size)
     handle_hw_op(ibe, hw_op);
 }
 
-static void chr_event(void *opaque, int event)
+static void chr_event(void *opaque, QEMUChrEvent event)
 {
     IPMIBmcExtern *ibe = opaque;
     IPMIInterface *s = ibe->parent.intf;

hw/mips/boston.c

@@ -98,7 +98,7 @@ enum boston_plat_reg {
     PLAT_SYS_CTL        = 0x48,
 };
 
-static void boston_lcd_event(void *opaque, int event)
+static void boston_lcd_event(void *opaque, QEMUChrEvent event)
 {
     BostonState *s = opaque;
     if (event == CHR_EVENT_OPENED && !s->lcd_inited) {

hw/mips/mips_malta.c

@@ -545,7 +545,7 @@ static void malta_fpga_reset(void *opaque)
     snprintf(s->display_text, 9, "        ");
 }
 
-static void malta_fgpa_display_event(void *opaque, int event)
+static void malta_fgpa_display_event(void *opaque, QEMUChrEvent event)
 {
     MaltaFPGAState *s = opaque;
 

hw/riscv/riscv_htif.c

@@ -96,7 +96,7 @@ static void htif_recv(void *opaque, const uint8_t *buf, int size)
  * Called by the char dev to supply special events to the HTIF console.
  * Not used for HTIF.
  */
-static void htif_event(void *opaque, int event)
+static void htif_event(void *opaque, QEMUChrEvent event)
 {
 
 }

hw/riscv/sifive_uart.c

@@ -162,7 +162,7 @@ static int uart_can_rx(void *opaque)
     return s->rx_fifo_len < sizeof(s->rx_fifo);
 }
 
-static void uart_event(void *opaque, int event)
+static void uart_event(void *opaque, QEMUChrEvent event)
 {
 }
 

hw/usb/ccid-card-passthru.c

@@ -307,7 +307,7 @@ static void ccid_card_vscard_read(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void ccid_card_vscard_event(void *opaque, int event)
+static void ccid_card_vscard_event(void *opaque, QEMUChrEvent event)
 {
     PassthruState *card = opaque;
 

hw/usb/dev-serial.c

@@ -461,7 +461,7 @@ static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
     s->recv_used += size;
 }
 
-static void usb_serial_event(void *opaque, int event)
+static void usb_serial_event(void *opaque, QEMUChrEvent event)
 {
     USBSerialState *s = opaque;
 

hw/usb/redirect.c

@@ -1354,7 +1354,7 @@ static void usbredir_chardev_read(void *opaque, const uint8_t *buf, int size)
     usbredirparser_do_write(dev->parser);
 }
 
-static void usbredir_chardev_event(void *opaque, int event)
+static void usbredir_chardev_event(void *opaque, QEMUChrEvent event)
 {
     USBRedirDevice *dev = opaque;
 

include/chardev/char-fe.h

@@ -4,7 +4,7 @@
 #include "chardev/char.h"
 #include "qemu/main-loop.h"
 
-typedef void IOEventHandler(void *opaque, int event);
+typedef void IOEventHandler(void *opaque, QEMUChrEvent event);
 typedef int BackendChangeHandler(void *opaque);
 
 /* This is the backend as seen by frontend, the actual backend is

monitor/hmp.c

@@ -1322,7 +1322,7 @@ static void monitor_read(void *opaque, const uint8_t *buf, int size)
     cur_mon = old_mon;
 }
 
-static void monitor_event(void *opaque, int event)
+static void monitor_event(void *opaque, QEMUChrEvent event)
 {
     Monitor *mon = opaque;
     MonitorHMP *hmp_mon = container_of(mon, MonitorHMP, common);

monitor/qmp.c

@@ -337,7 +337,7 @@ static QDict *qmp_greeting(MonitorQMP *mon)
         ver, cap_list);
 }
 
-static void monitor_qmp_event(void *opaque, int event)
+static void monitor_qmp_event(void *opaque, QEMUChrEvent event)
 {
     QDict *data;
     MonitorQMP *mon = opaque;

net/filter-mirror.c

@@ -132,7 +132,7 @@ static void redirector_chr_read(void *opaque, const uint8_t *buf, int size)
     }
 }
 
-static void redirector_chr_event(void *opaque, int event)
+static void redirector_chr_event(void *opaque, QEMUChrEvent event)
 {
     NetFilterState *nf = opaque;
     MirrorState *s = FILTER_REDIRECTOR(nf);

net/vhost-user.c

@@ -218,7 +218,7 @@ static gboolean net_vhost_user_watch(GIOChannel *chan, GIOCondition cond,
     return TRUE;
 }
 
-static void net_vhost_user_event(void *opaque, int event);
+static void net_vhost_user_event(void *opaque, QEMUChrEvent event);
 
 static void chr_closed_bh(void *opaque)
 {
@@ -249,7 +249,7 @@ static void chr_closed_bh(void *opaque)
     }
 }
 
-static void net_vhost_user_event(void *opaque, int event)
+static void net_vhost_user_event(void *opaque, QEMUChrEvent event)
 {
     const char *name = opaque;
     NetClientState *ncs[MAX_QUEUE_NUM];

qtest.c

@@ -722,7 +722,7 @@ static int qtest_can_read(void *opaque)
     return 1024;
 }
 
-static void qtest_event(void *opaque, int event)
+static void qtest_event(void *opaque, QEMUChrEvent event)
 {
     int i;
 

tests/test-char.c

@@ -54,7 +54,7 @@ static void fe_read(void *opaque, const uint8_t *buf, int size)
     quit = true;
 }
 
-static void fe_event(void *opaque, int event)
+static void fe_event(void *opaque, QEMUChrEvent event)
 {
     FeHandler *h = opaque;
     bool new_open_state;
@@ -633,7 +633,7 @@ typedef struct {
 
 
 static void
-char_socket_event(void *opaque, int event)
+char_socket_event(void *opaque, QEMUChrEvent event)
 {
     CharSocketTestData *data = opaque;
     data->event = event;
@@ -1006,7 +1006,7 @@ static void char_socket_client_test(gconstpointer opaque)
 }
 
 static void
-count_closed_event(void *opaque, int event)
+count_closed_event(void *opaque, QEMUChrEvent event)
 {
     int *count = opaque;
     if (event == CHR_EVENT_CLOSED) {

tests/vhost-user-test.c

@@ -499,7 +499,7 @@ static TestServer *test_server_new(const gchar *name)
     return server;
 }
 
-static void chr_event(void *opaque, int event)
+static void chr_event(void *opaque, QEMUChrEvent event)
 {
     TestServer *s = opaque;