1 /***************************************************************************
2 *
3 * hotplug.c : HAL-internal hotplug events
4 *
5 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
6 * Use is subject to license terms.
7 *
8 * Licensed under the Academic Free License version 2.1
9 *
10 **************************************************************************/
11
12
13 #ifdef HAVE_CONFIG_H
14 # include <config.h>
15 #endif
16
17 #include <stdio.h>
18 #include <string.h>
19 #include <errno.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <sys/un.h>
23 #include <sys/utsname.h>
24 #include <unistd.h>
25
26 #include <glib.h>
27 #include <dbus/dbus.h>
28 #include <dbus/dbus-glib.h>
29
30 #include "../osspec.h"
31 #include "../logger.h"
32 #include "../hald.h"
33 #include "../device_info.h"
34
35 #include "osspec_solaris.h"
36 #include "hotplug.h"
37 #include "devinfo.h"
38
39 /** Queue of ordered hotplug events */
40 GQueue *hotplug_event_queue;
41
42 /** List of HotplugEvent objects we are currently processing */
43 GSList *hotplug_events_in_progress = NULL;
44
45 static void hotplug_event_begin (HotplugEvent *hotplug_event);
46
47 void
hotplug_event_end(void * end_token)48 hotplug_event_end (void *end_token)
49 {
50 HotplugEvent *hotplug_event = (HotplugEvent *) end_token;
51
52 hotplug_events_in_progress = g_slist_remove (hotplug_events_in_progress, hotplug_event);
53 g_free (hotplug_event);
54 hotplug_event_process_queue ();
55 }
56
57 static void
hotplug_event_begin_devfs_add(HotplugEvent * hotplug_event,HalDevice * d)58 hotplug_event_begin_devfs_add (HotplugEvent *hotplug_event, HalDevice *d)
59 {
60 HalDevice *parent;
61 const gchar *parent_udi;
62 void (*begin_add_func) (HalDevice *, HalDevice *, DevinfoDevHandler *, void *);
63
64 if (d != NULL) {
65 /* XXX */
66 HAL_ERROR (("devpath %s already present in store, ignore event", hotplug_event->un.devfs.devfs_path));
67
68 goto out;
69 }
70
71 /* find parent */
72 parent_udi = hal_device_property_get_string (hotplug_event->d, "info.parent");
73 if (parent_udi == NULL || strlen(parent_udi) == 0) {
74 parent = NULL;
75 } else {
76 parent = hal_device_store_match_key_value_string (hald_get_gdl (), "info.udi", parent_udi);
77 }
78 /* only root node is allowed to be orphan */
79 if (parent == NULL) {
80 if (strcmp(hotplug_event->un.devfs.devfs_path, "/") != 0) {
81 HAL_ERROR (("Parent is NULL devfs_path=%s parent_udi=%s", hotplug_event->un.devfs.devfs_path, parent_udi ? parent_udi : "<null>"));
82
83 goto out;
84 }
85 }
86
87 /* children of ignored parent should be ignored */
88 if (parent != NULL && hal_device_property_get_bool (parent, "info.ignore")) {
89 HAL_INFO (("parent ignored %s", parent_udi));
90
91 goto out;
92 }
93
94 /* custom or generic add function */
95 begin_add_func = hotplug_event->un.devfs.handler->hotplug_begin_add;
96 if (begin_add_func == NULL) {
97 begin_add_func = hotplug_event_begin_add_devinfo;
98 }
99 begin_add_func (hotplug_event->d,
100 parent,
101 hotplug_event->un.devfs.handler,
102 (void *) hotplug_event);
103 return;
104
105 out:
106 g_object_unref (hotplug_event->d);
107 hotplug_event_end ((void *) hotplug_event);
108
109 return;
110 }
111
112 static void
hotplug_event_begin_devfs_remove(HotplugEvent * hotplug_event,HalDevice * d)113 hotplug_event_begin_devfs_remove (HotplugEvent *hotplug_event, HalDevice *d)
114 {
115 if (d == NULL) {
116 HAL_ERROR (("devpath %s not present in store, ignore event", hotplug_event->un.devfs.devfs_path));
117 hotplug_event_end ((void *) hotplug_event);
118 return;
119 }
120 HAL_INFO (("hotplug_event_begin_devfs_remove %s", hal_device_get_udi (d)));
121
122 hotplug_event_begin_remove_devinfo(d,
123 hotplug_event->un.devfs.devfs_path,
124 (void *) hotplug_event);
125 }
126
127 static void
hotplug_event_begin_devfs(HotplugEvent * hotplug_event)128 hotplug_event_begin_devfs (HotplugEvent *hotplug_event)
129 {
130 HalDevice *d;
131
132 HAL_INFO (("hotplug_event_begin_devfs: %s", hotplug_event->un.devfs.devfs_path));
133 d = hal_device_store_match_key_value_string (hald_get_gdl (),
134 "solaris.devfs_path",
135 hotplug_event->un.devfs.devfs_path);
136
137 if (hotplug_event->action == HOTPLUG_ACTION_ADD) {
138 hotplug_event_begin_devfs_add (hotplug_event, d);
139 } else if (hotplug_event->action == HOTPLUG_ACTION_REMOVE) {
140 hotplug_event_begin_devfs_remove (hotplug_event, d);
141 } else {
142 HAL_ERROR (("unsupported action %d", hotplug_event->action));
143 g_object_unref (hotplug_event->d);
144 hotplug_event_end ((void *) hotplug_event);
145 }
146 }
147
148 static void
hotplug_event_begin(HotplugEvent * hotplug_event)149 hotplug_event_begin (HotplugEvent *hotplug_event)
150 {
151 switch (hotplug_event->type) {
152
153 case HOTPLUG_EVENT_DEVFS:
154 hotplug_event_begin_devfs (hotplug_event);
155 break;
156
157 default:
158 HAL_ERROR (("Unknown hotplug event type %d", hotplug_event->type));
159 g_object_unref (hotplug_event->d);
160 hotplug_event_end ((void *) hotplug_event);
161 break;
162 }
163 }
164
165 void
hotplug_event_enqueue(HotplugEvent * hotplug_event,int front)166 hotplug_event_enqueue (HotplugEvent *hotplug_event, int front)
167 {
168 if (hotplug_event_queue == NULL)
169 hotplug_event_queue = g_queue_new ();
170
171 if (front) {
172 g_queue_push_head (hotplug_event_queue, hotplug_event);
173 } else {
174 g_queue_push_tail (hotplug_event_queue, hotplug_event);
175 }
176 }
177
178 void
hotplug_event_process_queue(void)179 hotplug_event_process_queue (void)
180 {
181 HotplugEvent *hotplug_event;
182
183 if (hotplug_events_in_progress == NULL &&
184 (hotplug_event_queue == NULL || g_queue_is_empty (hotplug_event_queue))) {
185 hotplug_queue_now_empty ();
186 goto out;
187 }
188
189 /* do not process events if some other event is in progress */
190 if (hotplug_events_in_progress != NULL && g_slist_length (hotplug_events_in_progress) > 0)
191 goto out;
192
193 hotplug_event = g_queue_pop_head (hotplug_event_queue);
194 if (hotplug_event == NULL)
195 goto out;
196
197 hotplug_events_in_progress = g_slist_append (hotplug_events_in_progress, hotplug_event);
198 hotplug_event_begin (hotplug_event);
199
200 out:
201 ;
202 }
203