[PATCH 07/16] Remove use of global 'reds' var from spice_server_remove_interface()

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From: Jonathon Jongsma <jjongsma@xxxxxxxxxx>

Since this is public API, we can't easily change the signature of the
function to take a RedsState argument, so instead we apply a hack and
store the reds argument inside the device state struct when the
interface is added, and retrieve it for use later when it is removed.
---
 server/char-device.c    | 11 +++++++++++
 server/char-device.h    |  2 ++
 server/inputs-channel.c | 16 +++++++++++-----
 server/inputs-channel.h |  8 +++-----
 server/reds.c           | 13 +++++++++++--
 5 files changed, 38 insertions(+), 12 deletions(-)

diff --git a/server/char-device.c b/server/char-device.c
index 7c209cd..aa2eafd 100644
--- a/server/char-device.c
+++ b/server/char-device.c
@@ -71,6 +71,7 @@ struct SpiceCharDeviceState {
 
     SpiceCharDeviceCallbacks cbs;
     void *opaque;
+    SpiceServer *reds;
 };
 
 enum {
@@ -1034,3 +1035,13 @@ int spice_char_device_state_restore(SpiceCharDeviceState *dev,
     spice_char_device_read_from_device(dev);
     return TRUE;
 }
+
+void spice_char_device_set_server(SpiceCharDeviceState *dev, SpiceServer *server)
+{
+    dev->reds = server;
+}
+
+SpiceServer* spice_char_device_get_server(SpiceCharDeviceState *dev)
+{
+    return dev->reds;
+}
diff --git a/server/char-device.h b/server/char-device.h
index ca2e96b..a9c666a 100644
--- a/server/char-device.h
+++ b/server/char-device.h
@@ -181,6 +181,8 @@ int spice_char_device_client_exists(SpiceCharDeviceState *dev,
 
 void spice_char_device_start(SpiceCharDeviceState *dev);
 void spice_char_device_stop(SpiceCharDeviceState *dev);
+void spice_char_device_set_server(SpiceCharDeviceState *dev, SpiceServer *server);
+SpiceServer* spice_char_device_get_server(SpiceCharDeviceState *dev);
 
 /** Read from device **/
 
diff --git a/server/inputs-channel.c b/server/inputs-channel.c
index a5959c1..9f33f0d 100644
--- a/server/inputs-channel.c
+++ b/server/inputs-channel.c
@@ -63,7 +63,7 @@ struct SpiceKbdState {
     bool key_ext[0x7f];
 };
 
-SpiceKbdState* spice_kbd_state_new(void)
+static SpiceKbdState* spice_kbd_state_new(void)
 {
     return spice_new0(SpiceKbdState, 1);
 }
@@ -72,20 +72,25 @@ struct SpiceMouseState {
     int dummy;
 };
 
-SpiceMouseState* spice_mouse_state_new(void)
+static SpiceMouseState* spice_mouse_state_new(void)
 {
     return spice_new0(SpiceMouseState, 1);
 }
 
 struct SpiceTabletState {
-    int dummy;
+    RedsState *reds;
 };
 
-SpiceTabletState* spice_tablet_state_new(void)
+static SpiceTabletState* spice_tablet_state_new(void)
 {
     return spice_new0(SpiceTabletState, 1);
 }
 
+RedsState* spice_tablet_state_get_server(SpiceTabletState *st)
+{
+    return st->reds;
+}
+
 typedef struct InputsChannelClient {
     RedChannelClient base;
     uint16_t motion_count;
@@ -685,7 +690,7 @@ SpiceTabletInstance* inputs_channel_get_tablet(InputsChannel *inputs)
     return inputs->tablet;
 }
 
-int inputs_channel_set_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet)
+int inputs_channel_set_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet, RedsState *reds)
 {
     if (inputs->tablet) {
         spice_printerr("already have tablet");
@@ -693,6 +698,7 @@ int inputs_channel_set_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet
     }
     inputs->tablet = tablet;
     inputs->tablet->st = spice_tablet_state_new();
+    inputs->tablet->st->reds = reds;
     return 0;
 }
 
diff --git a/server/inputs-channel.h b/server/inputs-channel.h
index d26ae43..31574b5 100644
--- a/server/inputs-channel.h
+++ b/server/inputs-channel.h
@@ -31,16 +31,14 @@ const VDAgentMouseState *inputs_channel_get_mouse_state(InputsChannel *inputs);
 void inputs_channel_on_keyboard_leds_change(InputsChannel *inputs, uint8_t leds);
 void inputs_channel_set_tablet_logical_size(InputsChannel *inputs, int x_res, int y_res);
 
-SpiceKbdState* spice_kbd_state_new(void);
-SpiceMouseState* spice_mouse_state_new(void);
-SpiceTabletState* spice_tablet_state_new(void);
-
 SpiceKbdInstance* inputs_channel_get_keyboard(InputsChannel *inputs);
 int inputs_channel_set_keyboard(InputsChannel *inputs, SpiceKbdInstance *keyboard);
 SpiceMouseInstance* inputs_channel_get_mouse(InputsChannel *inputs);
 int inputs_channel_set_mouse(InputsChannel *inputs, SpiceMouseInstance *mouse);
 SpiceTabletInstance* inputs_channel_get_tablet(InputsChannel *inputs);
-int inputs_channel_set_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet);
+int inputs_channel_set_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet, RedsState *reds);
 int inputs_channel_has_tablet(InputsChannel *inputs);
 void inputs_channel_detach_tablet(InputsChannel *inputs, SpiceTabletInstance *tablet);
+RedsState* spice_tablet_state_get_server(SpiceTabletState *dev);
+
 #endif
diff --git a/server/reds.c b/server/reds.c
index 15d20a5..ebb1629 100644
--- a/server/reds.c
+++ b/server/reds.c
@@ -3160,6 +3160,7 @@ static int spice_server_char_device_add_interface(SpiceServer *s,
         if (reds->vm_running) {
             spice_char_device_start(char_device->st);
         }
+        spice_char_device_set_server(char_device->st, reds);
         reds_char_device_add_state(reds, char_device->st);
     } else {
         spice_warning("failed to create device state for %s", char_device->subtype);
@@ -3235,13 +3236,14 @@ SPICE_GNUC_VISIBLE int spice_server_add_interface(SpiceServer *reds,
         red_dispatcher_init(qxl);
 
     } else if (strcmp(interface->type, SPICE_INTERFACE_TABLET) == 0) {
+        SpiceTabletInstance *tablet = SPICE_CONTAINEROF(sin, SpiceTabletInstance, base);
         spice_info("SPICE_INTERFACE_TABLET");
         if (interface->major_version != SPICE_INTERFACE_TABLET_MAJOR ||
             interface->minor_version > SPICE_INTERFACE_TABLET_MINOR) {
             spice_warning("unsupported tablet interface");
             return -1;
         }
-        if (inputs_channel_set_tablet(reds->inputs_channel, SPICE_CONTAINEROF(sin, SpiceTabletInstance, base)) != 0) {
+        if (inputs_channel_set_tablet(reds->inputs_channel, tablet, reds) != 0) {
             return -1;
         }
         reds_update_mouse_mode(reds);
@@ -3296,11 +3298,15 @@ SPICE_GNUC_VISIBLE int spice_server_add_interface(SpiceServer *reds,
 
 SPICE_GNUC_VISIBLE int spice_server_remove_interface(SpiceBaseInstance *sin)
 {
+    RedsState *reds;
     const SpiceBaseInterface *interface = sin->sif;
 
     if (strcmp(interface->type, SPICE_INTERFACE_TABLET) == 0) {
+        SpiceTabletInstance *tablet = SPICE_CONTAINEROF(sin, SpiceTabletInstance, base);
+        reds = spice_tablet_state_get_server(tablet->st);
+        g_return_val_if_fail(reds != NULL, -1);
         spice_info("remove SPICE_INTERFACE_TABLET");
-        inputs_channel_detach_tablet(reds->inputs_channel, SPICE_CONTAINEROF(sin, SpiceTabletInstance, base));
+        inputs_channel_detach_tablet(reds->inputs_channel, tablet);
         reds_update_mouse_mode(reds);
     } else if (strcmp(interface->type, SPICE_INTERFACE_PLAYBACK) == 0) {
         spice_info("remove SPICE_INTERFACE_PLAYBACK");
@@ -3309,6 +3315,9 @@ SPICE_GNUC_VISIBLE int spice_server_remove_interface(SpiceBaseInstance *sin)
         spice_info("remove SPICE_INTERFACE_RECORD");
         snd_detach_record(SPICE_CONTAINEROF(sin, SpiceRecordInstance, base));
     } else if (strcmp(interface->type, SPICE_INTERFACE_CHAR_DEVICE) == 0) {
+        SpiceCharDeviceInstance *char_device = SPICE_CONTAINEROF(sin, SpiceCharDeviceInstance, base);
+        reds = spice_char_device_get_server(char_device->st);
+        g_return_val_if_fail(reds != NULL, -1);
         spice_server_char_device_remove_interface(reds, sin);
     } else {
         spice_warning("VD_INTERFACE_REMOVING unsupported");
-- 
2.4.3

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