*/
#include <linux/spinlock.h>
+#include <linux/string.h>
+#include <linux/kobject.h>
+#include <linux/module.h>
+
#include <linux/socket.h>
#include <linux/skbuff.h>
#include <linux/netlink.h>
-#include <linux/string.h>
-#include <linux/kobject.h>
#include <net/sock.h>
-/* the strings here must match the enum in include/linux/kobject.h */
-const char *kobject_actions[] = {
- "add",
- "remove",
- "change",
- "move",
- "online",
- "offline",
-};
-
-#if defined(CONFIG_HOTPLUG)
u64 uevent_seqnum;
char uevent_helper[UEVENT_HELPER_PATH_LEN] = CONFIG_UEVENT_HELPER_PATH;
static DEFINE_SPINLOCK(sequence_lock);
static struct sock *uevent_sock;
#endif
+/* the strings here must match the enum in include/linux/kobject.h */
+static const char *kobject_actions[] = {
+ [KOBJ_ADD] = "add",
+ [KOBJ_REMOVE] = "remove",
+ [KOBJ_CHANGE] = "change",
+ [KOBJ_MOVE] = "move",
+ [KOBJ_ONLINE] = "online",
+ [KOBJ_OFFLINE] = "offline",
+};
+
+/**
+ * kobject_action_type - translate action string to numeric type
+ *
+ * @buf: buffer containing the action string, newline is ignored
+ * @len: length of buffer
+ * @type: pointer to the location to store the action type
+ *
+ * Returns 0 if the action string was recognized.
+ */
+int kobject_action_type(const char *buf, size_t count,
+ enum kobject_action *type)
+{
+ enum kobject_action action;
+ int ret = -EINVAL;
+
+ if (count && (buf[count-1] == '\n' || buf[count-1] == '\0'))
+ count--;
+
+ if (!count)
+ goto out;
+
+ for (action = 0; action < ARRAY_SIZE(kobject_actions); action++) {
+ if (strncmp(kobject_actions[action], buf, count) != 0)
+ continue;
+ if (kobject_actions[action][count] != '\0')
+ continue;
+ *type = action;
+ ret = 0;
+ break;
+ }
+out:
+ return ret;
+}
+
/**
* kobject_uevent_env - send an uevent with environmental data
*
- * @action: action that is happening (usually KOBJ_MOVE)
+ * @action: action that is happening
* @kobj: struct kobject that the action is happening to
* @envp_ext: pointer to environmental data
*
int i = 0;
int retval = 0;
- pr_debug("%s\n", __FUNCTION__);
+ pr_debug("kobject: '%s' (%p): %s\n",
+ kobject_name(kobj), kobj, __func__);
/* search the kset we belong to */
top_kobj = kobj;
- while (!top_kobj->kset && top_kobj->parent) {
+ while (!top_kobj->kset && top_kobj->parent)
top_kobj = top_kobj->parent;
- }
+
if (!top_kobj->kset) {
- pr_debug("kobject attempted to send uevent without kset!\n");
+ pr_debug("kobject: '%s' (%p): %s: attempted to send uevent "
+ "without kset!\n", kobject_name(kobj), kobj,
+ __func__);
return -EINVAL;
}
/* skip the event, if the filter returns zero. */
if (uevent_ops && uevent_ops->filter)
if (!uevent_ops->filter(kset, kobj)) {
- pr_debug("kobject filter function caused the event to drop!\n");
+ pr_debug("kobject: '%s' (%p): %s: filter function "
+ "caused the event to drop!\n",
+ kobject_name(kobj), kobj, __func__);
return 0;
}
else
subsystem = kobject_name(&kset->kobj);
if (!subsystem) {
- pr_debug("unset subsytem caused the event to drop!\n");
+ pr_debug("kobject: '%s' (%p): %s: unset subsystem caused the "
+ "event to drop!\n", kobject_name(kobj), kobj,
+ __func__);
return 0;
}
/* keys passed in from the caller */
if (envp_ext) {
for (i = 0; envp_ext[i]; i++) {
- retval = add_uevent_var(env, envp_ext[i]);
+ retval = add_uevent_var(env, "%s", envp_ext[i]);
if (retval)
goto exit;
}
if (uevent_ops && uevent_ops->uevent) {
retval = uevent_ops->uevent(kset, kobj, env);
if (retval) {
- pr_debug ("%s - uevent() returned %d\n",
- __FUNCTION__, retval);
+ pr_debug("kobject: '%s' (%p): %s: uevent() returned "
+ "%d\n", kobject_name(kobj), kobj,
+ __func__, retval);
goto exit;
}
}
+ /*
+ * Mark "add" and "remove" events in the object to ensure proper
+ * events to userspace during automatic cleanup. If the object did
+ * send an "add" event, "remove" will automatically generated by
+ * the core, if not already done by the caller.
+ */
+ if (action == KOBJ_ADD)
+ kobj->state_add_uevent_sent = 1;
+ else if (action == KOBJ_REMOVE)
+ kobj->state_remove_uevent_sent = 1;
+
/* we will send an event, so request a new sequence number */
spin_lock(&sequence_lock);
seq = ++uevent_seqnum;
}
NETLINK_CB(skb).dst_group = 1;
- netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
- }
+ retval = netlink_broadcast(uevent_sock, skb, 0, 1,
+ GFP_KERNEL);
+ } else
+ retval = -ENOMEM;
}
#endif
retval = add_uevent_var(env, "HOME=/");
if (retval)
goto exit;
- retval = add_uevent_var(env, "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
+ retval = add_uevent_var(env,
+ "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
if (retval)
goto exit;
- call_usermodehelper (argv[0], argv, env->envp, UMH_WAIT_EXEC);
+ retval = call_usermodehelper(argv[0], argv,
+ env->envp, UMH_WAIT_EXEC);
}
exit:
kfree(env);
return retval;
}
-
EXPORT_SYMBOL_GPL(kobject_uevent_env);
/**
* kobject_uevent - notify userspace by ending an uevent
*
- * @action: action that is happening (usually KOBJ_ADD and KOBJ_REMOVE)
+ * @action: action that is happening
* @kobj: struct kobject that the action is happening to
*
* Returns 0 if kobject_uevent() is completed with success or the
{
return kobject_uevent_env(kobj, action, NULL);
}
-
EXPORT_SYMBOL_GPL(kobject_uevent);
/**
int len;
if (env->envp_idx >= ARRAY_SIZE(env->envp)) {
- printk(KERN_ERR "add_uevent_var: too many keys\n");
- WARN_ON(1);
+ WARN(1, KERN_ERR "add_uevent_var: too many keys\n");
return -ENOMEM;
}
va_end(args);
if (len >= (sizeof(env->buf) - env->buflen)) {
- printk(KERN_ERR "add_uevent_var: buffer size too small\n");
- WARN_ON(1);
+ WARN(1, KERN_ERR "add_uevent_var: buffer size too small\n");
return -ENOMEM;
}
postcore_initcall(kobject_uevent_init);
#endif
-
-#endif /* CONFIG_HOTPLUG */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff