diff options
Diffstat (limited to 'drivers/connector/connector.c')
| -rw-r--r-- | drivers/connector/connector.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c index f06024668f9..537c29ac448 100644 --- a/drivers/connector/connector.c +++ b/drivers/connector/connector.c @@ -36,17 +36,6 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>"); MODULE_DESCRIPTION("Generic userspace <-> kernelspace connector."); -static u32 cn_idx = CN_IDX_CONNECTOR; -static u32 cn_val = CN_VAL_CONNECTOR; - -module_param(cn_idx, uint, 0); -module_param(cn_val, uint, 0); -MODULE_PARM_DESC(cn_idx, "Connector's main device idx."); -MODULE_PARM_DESC(cn_val, "Connector's main device val."); - -static DEFINE_MUTEX(notify_lock); -static LIST_HEAD(notify_list); - static struct cn_dev cdev; static int cn_already_initialized; @@ -210,54 +199,6 @@ static void cn_rx_skb(struct sk_buff *__skb) } /* - * Notification routing. - * - * Gets id and checks if there are notification request for it's idx - * and val. If there are such requests notify the listeners with the - * given notify event. - * - */ -static void cn_notify(struct cb_id *id, u32 notify_event) -{ - struct cn_ctl_entry *ent; - - mutex_lock(¬ify_lock); - list_for_each_entry(ent, ¬ify_list, notify_entry) { - int i; - struct cn_notify_req *req; - struct cn_ctl_msg *ctl = ent->msg; - int idx_found, val_found; - - idx_found = val_found = 0; - - req = (struct cn_notify_req *)ctl->data; - for (i = 0; i < ctl->idx_notify_num; ++i, ++req) { - if (id->idx >= req->first && - id->idx < req->first + req->range) { - idx_found = 1; - break; - } - } - - for (i = 0; i < ctl->val_notify_num; ++i, ++req) { - if (id->val >= req->first && - id->val < req->first + req->range) { - val_found = 1; - break; - } - } - - if (idx_found && val_found) { - struct cn_msg m = { .ack = notify_event, }; - - memcpy(&m.id, id, sizeof(m.id)); - cn_netlink_send(&m, ctl->group, GFP_KERNEL); - } - } - mutex_unlock(¬ify_lock); -} - -/* * Callback add routing - adds callback with given ID and name. * If there is registered callback with the same ID it will not be added. * @@ -276,8 +217,6 @@ int cn_add_callback(struct cb_id *id, char *name, if (err) return err; - cn_notify(id, 0); - return 0; } EXPORT_SYMBOL_GPL(cn_add_callback); @@ -295,111 +234,9 @@ void cn_del_callback(struct cb_id *id) struct cn_dev *dev = &cdev; cn_queue_del_callback(dev->cbdev, id); - cn_notify(id, 1); } EXPORT_SYMBOL_GPL(cn_del_callback); -/* - * Checks two connector's control messages to be the same. - * Returns 1 if they are the same or if the first one is corrupted. - */ -static int cn_ctl_msg_equals(struct cn_ctl_msg *m1, struct cn_ctl_msg *m2) -{ - int i; - struct cn_notify_req *req1, *req2; - - if (m1->idx_notify_num != m2->idx_notify_num) - return 0; - - if (m1->val_notify_num != m2->val_notify_num) - return 0; - - if (m1->len != m2->len) - return 0; - - if ((m1->idx_notify_num + m1->val_notify_num) * sizeof(*req1) != - m1->len) - return 1; - - req1 = (struct cn_notify_req *)m1->data; - req2 = (struct cn_notify_req *)m2->data; - - for (i = 0; i < m1->idx_notify_num; ++i) { - if (req1->first != req2->first || req1->range != req2->range) - return 0; - req1++; - req2++; - } - - for (i = 0; i < m1->val_notify_num; ++i) { - if (req1->first != req2->first || req1->range != req2->range) - return 0; - req1++; - req2++; - } - - return 1; -} - -/* - * Main connector device's callback. - * - * Used for notification of a request's processing. - */ -static void cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) -{ - struct cn_ctl_msg *ctl; - struct cn_ctl_entry *ent; - u32 size; - - if (msg->len < sizeof(*ctl)) - return; - - ctl = (struct cn_ctl_msg *)msg->data; - - size = (sizeof(*ctl) + ((ctl->idx_notify_num + - ctl->val_notify_num) * - sizeof(struct cn_notify_req))); - - if (msg->len != size) - return; - - if (ctl->len + sizeof(*ctl) != msg->len) - return; - - /* - * Remove notification. - */ - if (ctl->group == 0) { - struct cn_ctl_entry *n; - - mutex_lock(¬ify_lock); - list_for_each_entry_safe(ent, n, ¬ify_list, notify_entry) { - if (cn_ctl_msg_equals(ent->msg, ctl)) { - list_del(&ent->notify_entry); - kfree(ent); - } - } - mutex_unlock(¬ify_lock); - - return; - } - - size += sizeof(*ent); - - ent = kzalloc(size, GFP_KERNEL); - if (!ent) - return; - - ent->msg = (struct cn_ctl_msg *)(ent + 1); - - memcpy(ent->msg, ctl, size - sizeof(*ent)); - - mutex_lock(¬ify_lock); - list_add(&ent->notify_entry, ¬ify_list); - mutex_unlock(¬ify_lock); -} - static int cn_proc_show(struct seq_file *m, void *v) { struct cn_queue_dev *dev = cdev.cbdev; @@ -437,11 +274,8 @@ static const struct file_operations cn_file_ops = { static int __devinit cn_init(void) { struct cn_dev *dev = &cdev; - int err; dev->input = cn_rx_skb; - dev->id.idx = cn_idx; - dev->id.val = cn_val; dev->nls = netlink_kernel_create(&init_net, NETLINK_CONNECTOR, CN_NETLINK_USERS + 0xf, @@ -457,14 +291,6 @@ static int __devinit cn_init(void) cn_already_initialized = 1; - err = cn_add_callback(&dev->id, "connector", &cn_callback); - if (err) { - cn_already_initialized = 0; - cn_queue_free_dev(dev->cbdev); - netlink_kernel_release(dev->nls); - return -EINVAL; - } - proc_net_fops_create(&init_net, "connector", S_IRUGO, &cn_file_ops); return 0; @@ -478,7 +304,6 @@ static void __devexit cn_fini(void) proc_net_remove(&init_net, "connector"); - cn_del_callback(&dev->id); cn_queue_free_dev(dev->cbdev); netlink_kernel_release(dev->nls); } |