| /* |
| BlueZ - Bluetooth protocol stack for Linux |
| Copyright (C) 2000-2001 Qualcomm Incorporated |
| Copyright (C) 2011 ProFUSION Embedded Systems |
| |
| Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License version 2 as |
| published by the Free Software Foundation; |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
| CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
| SOFTWARE IS DISCLAIMED. |
| */ |
| |
| /* Bluetooth HCI core. */ |
| |
| #include <linux/jiffies.h> |
| #include <linux/module.h> |
| #include <linux/kmod.h> |
| |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/poll.h> |
| #include <linux/fcntl.h> |
| #include <linux/init.h> |
| #include <linux/skbuff.h> |
| #include <linux/workqueue.h> |
| #include <linux/interrupt.h> |
| #include <linux/notifier.h> |
| #include <linux/rfkill.h> |
| #include <linux/timer.h> |
| #include <linux/crypto.h> |
| #include <net/sock.h> |
| |
| #include <asm/system.h> |
| #include <linux/uaccess.h> |
| #include <asm/unaligned.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| |
| #define AUTO_OFF_TIMEOUT 2000 |
| |
| bool enable_hs; |
| |
| static void hci_rx_work(struct work_struct *work); |
| static void hci_cmd_work(struct work_struct *work); |
| static void hci_tx_work(struct work_struct *work); |
| |
| /* HCI device list */ |
| LIST_HEAD(hci_dev_list); |
| DEFINE_RWLOCK(hci_dev_list_lock); |
| |
| /* HCI callback list */ |
| LIST_HEAD(hci_cb_list); |
| DEFINE_RWLOCK(hci_cb_list_lock); |
| |
| /* HCI notifiers list */ |
| static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
| |
| /* ---- HCI notifications ---- */ |
| |
| int hci_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&hci_notifier, nb); |
| } |
| |
| int hci_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&hci_notifier, nb); |
| } |
| |
| static void hci_notify(struct hci_dev *hdev, int event) |
| { |
| atomic_notifier_call_chain(&hci_notifier, event, hdev); |
| } |
| |
| /* ---- HCI requests ---- */ |
| |
| void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) |
| { |
| BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result); |
| |
| /* If this is the init phase check if the completed command matches |
| * the last init command, and if not just return. |
| */ |
| if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) |
| return; |
| |
| if (hdev->req_status == HCI_REQ_PEND) { |
| hdev->req_result = result; |
| hdev->req_status = HCI_REQ_DONE; |
| wake_up_interruptible(&hdev->req_wait_q); |
| } |
| } |
| |
| static void hci_req_cancel(struct hci_dev *hdev, int err) |
| { |
| BT_DBG("%s err 0x%2.2x", hdev->name, err); |
| |
| if (hdev->req_status == HCI_REQ_PEND) { |
| hdev->req_result = err; |
| hdev->req_status = HCI_REQ_CANCELED; |
| wake_up_interruptible(&hdev->req_wait_q); |
| } |
| } |
| |
| /* Execute request and wait for completion. */ |
| static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
| unsigned long opt, __u32 timeout) |
| { |
| DECLARE_WAITQUEUE(wait, current); |
| int err = 0; |
| |
| BT_DBG("%s start", hdev->name); |
| |
| hdev->req_status = HCI_REQ_PEND; |
| |
| add_wait_queue(&hdev->req_wait_q, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| |
| req(hdev, opt); |
| schedule_timeout(timeout); |
| |
| remove_wait_queue(&hdev->req_wait_q, &wait); |
| |
| if (signal_pending(current)) |
| return -EINTR; |
| |
| switch (hdev->req_status) { |
| case HCI_REQ_DONE: |
| err = -bt_to_errno(hdev->req_result); |
| break; |
| |
| case HCI_REQ_CANCELED: |
| err = -hdev->req_result; |
| break; |
| |
| default: |
| err = -ETIMEDOUT; |
| break; |
| } |
| |
| hdev->req_status = hdev->req_result = 0; |
| |
| BT_DBG("%s end: err %d", hdev->name, err); |
| |
| return err; |
| } |
| |
| static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
| unsigned long opt, __u32 timeout) |
| { |
| int ret; |
| |
| if (!test_bit(HCI_UP, &hdev->flags)) |
| return -ENETDOWN; |
| |
| /* Serialize all requests */ |
| hci_req_lock(hdev); |
| ret = __hci_request(hdev, req, opt, timeout); |
| hci_req_unlock(hdev); |
| |
| return ret; |
| } |
| |
| static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| BT_DBG("%s %ld", hdev->name, opt); |
| |
| /* Reset device */ |
| set_bit(HCI_RESET, &hdev->flags); |
| hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
| } |
| |
| static void bredr_init(struct hci_dev *hdev) |
| { |
| struct hci_cp_delete_stored_link_key cp; |
| __le16 param; |
| __u8 flt_type; |
| |
| hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED; |
| |
| /* Mandatory initialization */ |
| |
| /* Reset */ |
| if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) { |
| set_bit(HCI_RESET, &hdev->flags); |
| hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
| } |
| |
| /* Read Local Supported Features */ |
| hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
| |
| /* Read Local Version */ |
| hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
| |
| /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
| hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
| |
| /* Read BD Address */ |
| hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
| |
| /* Read Class of Device */ |
| hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); |
| |
| /* Read Local Name */ |
| hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); |
| |
| /* Read Voice Setting */ |
| hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
| |
| /* Optional initialization */ |
| |
| /* Clear Event Filters */ |
| flt_type = HCI_FLT_CLEAR_ALL; |
| hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
| |
| /* Connection accept timeout ~20 secs */ |
| param = cpu_to_le16(0x7d00); |
| hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
| |
| bacpy(&cp.bdaddr, BDADDR_ANY); |
| cp.delete_all = 1; |
| hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp); |
| } |
| |
| static void amp_init(struct hci_dev *hdev) |
| { |
| hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED; |
| |
| /* Reset */ |
| hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
| |
| /* Read Local Version */ |
| hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
| } |
| |
| static void hci_init_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("%s %ld", hdev->name, opt); |
| |
| /* Driver initialization */ |
| |
| /* Special commands */ |
| while ((skb = skb_dequeue(&hdev->driver_init))) { |
| bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
| skb->dev = (void *) hdev; |
| |
| skb_queue_tail(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| } |
| skb_queue_purge(&hdev->driver_init); |
| |
| switch (hdev->dev_type) { |
| case HCI_BREDR: |
| bredr_init(hdev); |
| break; |
| |
| case HCI_AMP: |
| amp_init(hdev); |
| break; |
| |
| default: |
| BT_ERR("Unknown device type %d", hdev->dev_type); |
| break; |
| } |
| |
| } |
| |
| static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| BT_DBG("%s", hdev->name); |
| |
| /* Read LE buffer size */ |
| hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL); |
| } |
| |
| static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| __u8 scan = opt; |
| |
| BT_DBG("%s %x", hdev->name, scan); |
| |
| /* Inquiry and Page scans */ |
| hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
| } |
| |
| static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| __u8 auth = opt; |
| |
| BT_DBG("%s %x", hdev->name, auth); |
| |
| /* Authentication */ |
| hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
| } |
| |
| static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| __u8 encrypt = opt; |
| |
| BT_DBG("%s %x", hdev->name, encrypt); |
| |
| /* Encryption */ |
| hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
| } |
| |
| static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| __le16 policy = cpu_to_le16(opt); |
| |
| BT_DBG("%s %x", hdev->name, policy); |
| |
| /* Default link policy */ |
| hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); |
| } |
| |
| /* Get HCI device by index. |
| * Device is held on return. */ |
| struct hci_dev *hci_dev_get(int index) |
| { |
| struct hci_dev *hdev = NULL, *d; |
| |
| BT_DBG("%d", index); |
| |
| if (index < 0) |
| return NULL; |
| |
| read_lock(&hci_dev_list_lock); |
| list_for_each_entry(d, &hci_dev_list, list) { |
| if (d->id == index) { |
| hdev = hci_dev_hold(d); |
| break; |
| } |
| } |
| read_unlock(&hci_dev_list_lock); |
| return hdev; |
| } |
| |
| /* ---- Inquiry support ---- */ |
| |
| bool hci_discovery_active(struct hci_dev *hdev) |
| { |
| struct discovery_state *discov = &hdev->discovery; |
| |
| if (discov->state == DISCOVERY_INQUIRY || |
| discov->state == DISCOVERY_RESOLVING) |
| return true; |
| |
| return false; |
| } |
| |
| void hci_discovery_set_state(struct hci_dev *hdev, int state) |
| { |
| BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state); |
| |
| if (hdev->discovery.state == state) |
| return; |
| |
| switch (state) { |
| case DISCOVERY_STOPPED: |
| mgmt_discovering(hdev, 0); |
| break; |
| case DISCOVERY_STARTING: |
| break; |
| case DISCOVERY_INQUIRY: |
| mgmt_discovering(hdev, 1); |
| break; |
| case DISCOVERY_RESOLVING: |
| break; |
| case DISCOVERY_STOPPING: |
| break; |
| } |
| |
| hdev->discovery.state = state; |
| } |
| |
| static void inquiry_cache_flush(struct hci_dev *hdev) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *p, *n; |
| |
| list_for_each_entry_safe(p, n, &cache->all, all) { |
| list_del(&p->all); |
| kfree(p); |
| } |
| |
| INIT_LIST_HEAD(&cache->unknown); |
| INIT_LIST_HEAD(&cache->resolve); |
| cache->state = DISCOVERY_STOPPED; |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p, %s", cache, batostr(bdaddr)); |
| |
| list_for_each_entry(e, &cache->all, all) { |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev, |
| bdaddr_t *bdaddr) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p, %s", cache, batostr(bdaddr)); |
| |
| list_for_each_entry(e, &cache->unknown, list) { |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev, |
| bdaddr_t *bdaddr, |
| int state) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state); |
| |
| list_for_each_entry(e, &cache->resolve, list) { |
| if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state) |
| return e; |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| void hci_inquiry_cache_update_resolve(struct hci_dev *hdev, |
| struct inquiry_entry *ie) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct list_head *pos = &cache->resolve; |
| struct inquiry_entry *p; |
| |
| list_del(&ie->list); |
| |
| list_for_each_entry(p, &cache->resolve, list) { |
| if (p->name_state != NAME_PENDING && |
| abs(p->data.rssi) >= abs(ie->data.rssi)) |
| break; |
| pos = &p->list; |
| } |
| |
| list_add(&ie->list, pos); |
| } |
| |
| bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data, |
| bool name_known) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *ie; |
| |
| BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); |
| |
| ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
| if (ie) { |
| if (ie->name_state == NAME_NEEDED && |
| data->rssi != ie->data.rssi) { |
| ie->data.rssi = data->rssi; |
| hci_inquiry_cache_update_resolve(hdev, ie); |
| } |
| |
| goto update; |
| } |
| |
| /* Entry not in the cache. Add new one. */ |
| ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC); |
| if (!ie) |
| return false; |
| |
| list_add(&ie->all, &cache->all); |
| |
| if (name_known) { |
| ie->name_state = NAME_KNOWN; |
| } else { |
| ie->name_state = NAME_NOT_KNOWN; |
| list_add(&ie->list, &cache->unknown); |
| } |
| |
| update: |
| if (name_known && ie->name_state != NAME_KNOWN && |
| ie->name_state != NAME_PENDING) { |
| ie->name_state = NAME_KNOWN; |
| list_del(&ie->list); |
| } |
| |
| memcpy(&ie->data, data, sizeof(*data)); |
| ie->timestamp = jiffies; |
| cache->timestamp = jiffies; |
| |
| if (ie->name_state == NAME_NOT_KNOWN) |
| return false; |
| |
| return true; |
| } |
| |
| static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_info *info = (struct inquiry_info *) buf; |
| struct inquiry_entry *e; |
| int copied = 0; |
| |
| list_for_each_entry(e, &cache->all, all) { |
| struct inquiry_data *data = &e->data; |
| |
| if (copied >= num) |
| break; |
| |
| bacpy(&info->bdaddr, &data->bdaddr); |
| info->pscan_rep_mode = data->pscan_rep_mode; |
| info->pscan_period_mode = data->pscan_period_mode; |
| info->pscan_mode = data->pscan_mode; |
| memcpy(info->dev_class, data->dev_class, 3); |
| info->clock_offset = data->clock_offset; |
| |
| info++; |
| copied++; |
| } |
| |
| BT_DBG("cache %p, copied %d", cache, copied); |
| return copied; |
| } |
| |
| static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) |
| { |
| struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; |
| struct hci_cp_inquiry cp; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (test_bit(HCI_INQUIRY, &hdev->flags)) |
| return; |
| |
| /* Start Inquiry */ |
| memcpy(&cp.lap, &ir->lap, 3); |
| cp.length = ir->length; |
| cp.num_rsp = ir->num_rsp; |
| hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
| } |
| |
| int hci_inquiry(void __user *arg) |
| { |
| __u8 __user *ptr = arg; |
| struct hci_inquiry_req ir; |
| struct hci_dev *hdev; |
| int err = 0, do_inquiry = 0, max_rsp; |
| long timeo; |
| __u8 *buf; |
| |
| if (copy_from_user(&ir, ptr, sizeof(ir))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(ir.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| hci_dev_lock(hdev); |
| if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
| inquiry_cache_empty(hdev) || |
| ir.flags & IREQ_CACHE_FLUSH) { |
| inquiry_cache_flush(hdev); |
| do_inquiry = 1; |
| } |
| hci_dev_unlock(hdev); |
| |
| timeo = ir.length * msecs_to_jiffies(2000); |
| |
| if (do_inquiry) { |
| err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo); |
| if (err < 0) |
| goto done; |
| } |
| |
| /* for unlimited number of responses we will use buffer with 255 entries */ |
| max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; |
| |
| /* cache_dump can't sleep. Therefore we allocate temp buffer and then |
| * copy it to the user space. |
| */ |
| buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL); |
| if (!buf) { |
| err = -ENOMEM; |
| goto done; |
| } |
| |
| hci_dev_lock(hdev); |
| ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); |
| hci_dev_unlock(hdev); |
| |
| BT_DBG("num_rsp %d", ir.num_rsp); |
| |
| if (!copy_to_user(ptr, &ir, sizeof(ir))) { |
| ptr += sizeof(ir); |
| if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * |
| ir.num_rsp)) |
| err = -EFAULT; |
| } else |
| err = -EFAULT; |
| |
| kfree(buf); |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| /* ---- HCI ioctl helpers ---- */ |
| |
| int hci_dev_open(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int ret = 0; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_lock(hdev); |
| |
| if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) { |
| ret = -ERFKILL; |
| goto done; |
| } |
| |
| if (test_bit(HCI_UP, &hdev->flags)) { |
| ret = -EALREADY; |
| goto done; |
| } |
| |
| if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) |
| set_bit(HCI_RAW, &hdev->flags); |
| |
| /* Treat all non BR/EDR controllers as raw devices if |
| enable_hs is not set */ |
| if (hdev->dev_type != HCI_BREDR && !enable_hs) |
| set_bit(HCI_RAW, &hdev->flags); |
| |
| if (hdev->open(hdev)) { |
| ret = -EIO; |
| goto done; |
| } |
| |
| if (!test_bit(HCI_RAW, &hdev->flags)) { |
| atomic_set(&hdev->cmd_cnt, 1); |
| set_bit(HCI_INIT, &hdev->flags); |
| hdev->init_last_cmd = 0; |
| |
| ret = __hci_request(hdev, hci_init_req, 0, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| |
| if (lmp_host_le_capable(hdev)) |
| ret = __hci_request(hdev, hci_le_init_req, 0, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| |
| clear_bit(HCI_INIT, &hdev->flags); |
| } |
| |
| if (!ret) { |
| hci_dev_hold(hdev); |
| set_bit(HCI_UP, &hdev->flags); |
| hci_notify(hdev, HCI_DEV_UP); |
| if (!test_bit(HCI_SETUP, &hdev->dev_flags)) { |
| hci_dev_lock(hdev); |
| mgmt_powered(hdev, 1); |
| hci_dev_unlock(hdev); |
| } |
| } else { |
| /* Init failed, cleanup */ |
| flush_work(&hdev->tx_work); |
| flush_work(&hdev->cmd_work); |
| flush_work(&hdev->rx_work); |
| |
| skb_queue_purge(&hdev->cmd_q); |
| skb_queue_purge(&hdev->rx_q); |
| |
| if (hdev->flush) |
| hdev->flush(hdev); |
| |
| if (hdev->sent_cmd) { |
| kfree_skb(hdev->sent_cmd); |
| hdev->sent_cmd = NULL; |
| } |
| |
| hdev->close(hdev); |
| hdev->flags = 0; |
| } |
| |
| done: |
| hci_req_unlock(hdev); |
| hci_dev_put(hdev); |
| return ret; |
| } |
| |
| static int hci_dev_do_close(struct hci_dev *hdev) |
| { |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_cancel(hdev, ENODEV); |
| hci_req_lock(hdev); |
| |
| if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { |
| del_timer_sync(&hdev->cmd_timer); |
| hci_req_unlock(hdev); |
| return 0; |
| } |
| |
| /* Flush RX and TX works */ |
| flush_work(&hdev->tx_work); |
| flush_work(&hdev->rx_work); |
| |
| if (hdev->discov_timeout > 0) { |
| cancel_delayed_work(&hdev->discov_off); |
| hdev->discov_timeout = 0; |
| } |
| |
| if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
| cancel_delayed_work(&hdev->power_off); |
| |
| if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags)) |
| cancel_delayed_work(&hdev->service_cache); |
| |
| hci_dev_lock(hdev); |
| inquiry_cache_flush(hdev); |
| hci_conn_hash_flush(hdev); |
| hci_dev_unlock(hdev); |
| |
| hci_notify(hdev, HCI_DEV_DOWN); |
| |
| if (hdev->flush) |
| hdev->flush(hdev); |
| |
| /* Reset device */ |
| skb_queue_purge(&hdev->cmd_q); |
| atomic_set(&hdev->cmd_cnt, 1); |
| if (!test_bit(HCI_RAW, &hdev->flags)) { |
| set_bit(HCI_INIT, &hdev->flags); |
| __hci_request(hdev, hci_reset_req, 0, |
| msecs_to_jiffies(250)); |
| clear_bit(HCI_INIT, &hdev->flags); |
| } |
| |
| /* flush cmd work */ |
| flush_work(&hdev->cmd_work); |
| |
| /* Drop queues */ |
| skb_queue_purge(&hdev->rx_q); |
| skb_queue_purge(&hdev->cmd_q); |
| skb_queue_purge(&hdev->raw_q); |
| |
| /* Drop last sent command */ |
| if (hdev->sent_cmd) { |
| del_timer_sync(&hdev->cmd_timer); |
| kfree_skb(hdev->sent_cmd); |
| hdev->sent_cmd = NULL; |
| } |
| |
| /* After this point our queues are empty |
| * and no tasks are scheduled. */ |
| hdev->close(hdev); |
| |
| hci_dev_lock(hdev); |
| mgmt_powered(hdev, 0); |
| hci_dev_unlock(hdev); |
| |
| /* Clear flags */ |
| hdev->flags = 0; |
| |
| hci_req_unlock(hdev); |
| |
| hci_dev_put(hdev); |
| return 0; |
| } |
| |
| int hci_dev_close(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int err; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| err = hci_dev_do_close(hdev); |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| int hci_dev_reset(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int ret = 0; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| hci_req_lock(hdev); |
| |
| if (!test_bit(HCI_UP, &hdev->flags)) |
| goto done; |
| |
| /* Drop queues */ |
| skb_queue_purge(&hdev->rx_q); |
| skb_queue_purge(&hdev->cmd_q); |
| |
| hci_dev_lock(hdev); |
| inquiry_cache_flush(hdev); |
| hci_conn_hash_flush(hdev); |
| hci_dev_unlock(hdev); |
| |
| if (hdev->flush) |
| hdev->flush(hdev); |
| |
| atomic_set(&hdev->cmd_cnt, 1); |
| hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0; |
| |
| if (!test_bit(HCI_RAW, &hdev->flags)) |
| ret = __hci_request(hdev, hci_reset_req, 0, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| |
| done: |
| hci_req_unlock(hdev); |
| hci_dev_put(hdev); |
| return ret; |
| } |
| |
| int hci_dev_reset_stat(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int ret = 0; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| |
| hci_dev_put(hdev); |
| |
| return ret; |
| } |
| |
| int hci_dev_cmd(unsigned int cmd, void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_req dr; |
| int err = 0; |
| |
| if (copy_from_user(&dr, arg, sizeof(dr))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(dr.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| switch (cmd) { |
| case HCISETAUTH: |
| err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| break; |
| |
| case HCISETENCRYPT: |
| if (!lmp_encrypt_capable(hdev)) { |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| if (!test_bit(HCI_AUTH, &hdev->flags)) { |
| /* Auth must be enabled first */ |
| err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| if (err) |
| break; |
| } |
| |
| err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| break; |
| |
| case HCISETSCAN: |
| err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| break; |
| |
| case HCISETLINKPOL: |
| err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
| msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| break; |
| |
| case HCISETLINKMODE: |
| hdev->link_mode = ((__u16) dr.dev_opt) & |
| (HCI_LM_MASTER | HCI_LM_ACCEPT); |
| break; |
| |
| case HCISETPTYPE: |
| hdev->pkt_type = (__u16) dr.dev_opt; |
| break; |
| |
| case HCISETACLMTU: |
| hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
| hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); |
| break; |
| |
| case HCISETSCOMTU: |
| hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
| hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); |
| break; |
| |
| default: |
| err = -EINVAL; |
| break; |
| } |
| |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| int hci_get_dev_list(void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_list_req *dl; |
| struct hci_dev_req *dr; |
| int n = 0, size, err; |
| __u16 dev_num; |
| |
| if (get_user(dev_num, (__u16 __user *) arg)) |
| return -EFAULT; |
| |
| if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) |
| return -EINVAL; |
| |
| size = sizeof(*dl) + dev_num * sizeof(*dr); |
| |
| dl = kzalloc(size, GFP_KERNEL); |
| if (!dl) |
| return -ENOMEM; |
| |
| dr = dl->dev_req; |
| |
| read_lock(&hci_dev_list_lock); |
| list_for_each_entry(hdev, &hci_dev_list, list) { |
| if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
| cancel_delayed_work(&hdev->power_off); |
| |
| if (!test_bit(HCI_MGMT, &hdev->dev_flags)) |
| set_bit(HCI_PAIRABLE, &hdev->dev_flags); |
| |
| (dr + n)->dev_id = hdev->id; |
| (dr + n)->dev_opt = hdev->flags; |
| |
| if (++n >= dev_num) |
| break; |
| } |
| read_unlock(&hci_dev_list_lock); |
| |
| dl->dev_num = n; |
| size = sizeof(*dl) + n * sizeof(*dr); |
| |
| err = copy_to_user(arg, dl, size); |
| kfree(dl); |
| |
| return err ? -EFAULT : 0; |
| } |
| |
| int hci_get_dev_info(void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_info di; |
| int err = 0; |
| |
| if (copy_from_user(&di, arg, sizeof(di))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(di.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
| cancel_delayed_work_sync(&hdev->power_off); |
| |
| if (!test_bit(HCI_MGMT, &hdev->dev_flags)) |
| set_bit(HCI_PAIRABLE, &hdev->dev_flags); |
| |
| strcpy(di.name, hdev->name); |
| di.bdaddr = hdev->bdaddr; |
| di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4); |
| di.flags = hdev->flags; |
| di.pkt_type = hdev->pkt_type; |
| di.acl_mtu = hdev->acl_mtu; |
| di.acl_pkts = hdev->acl_pkts; |
| di.sco_mtu = hdev->sco_mtu; |
| di.sco_pkts = hdev->sco_pkts; |
| di.link_policy = hdev->link_policy; |
| di.link_mode = hdev->link_mode; |
| |
| memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); |
| memcpy(&di.features, &hdev->features, sizeof(di.features)); |
| |
| if (copy_to_user(arg, &di, sizeof(di))) |
| err = -EFAULT; |
| |
| hci_dev_put(hdev); |
| |
| return err; |
| } |
| |
| /* ---- Interface to HCI drivers ---- */ |
| |
| static int hci_rfkill_set_block(void *data, bool blocked) |
| { |
| struct hci_dev *hdev = data; |
| |
| BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); |
| |
| if (!blocked) |
| return 0; |
| |
| hci_dev_do_close(hdev); |
| |
| return 0; |
| } |
| |
| static const struct rfkill_ops hci_rfkill_ops = { |
| .set_block = hci_rfkill_set_block, |
| }; |
| |
| /* Alloc HCI device */ |
| struct hci_dev *hci_alloc_dev(void) |
| { |
| struct hci_dev *hdev; |
| |
| hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
| if (!hdev) |
| return NULL; |
| |
| hci_init_sysfs(hdev); |
| skb_queue_head_init(&hdev->driver_init); |
| |
| return hdev; |
| } |
| EXPORT_SYMBOL(hci_alloc_dev); |
| |
| /* Free HCI device */ |
| void hci_free_dev(struct hci_dev *hdev) |
| { |
| skb_queue_purge(&hdev->driver_init); |
| |
| /* will free via device release */ |
| put_device(&hdev->dev); |
| } |
| EXPORT_SYMBOL(hci_free_dev); |
| |
| static void hci_power_on(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (hci_dev_open(hdev->id) < 0) |
| return; |
| |
| if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags)) |
| schedule_delayed_work(&hdev->power_off, |
| msecs_to_jiffies(AUTO_OFF_TIMEOUT)); |
| |
| if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags)) |
| mgmt_index_added(hdev); |
| } |
| |
| static void hci_power_off(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, |
| power_off.work); |
| |
| BT_DBG("%s", hdev->name); |
| |
| clear_bit(HCI_AUTO_OFF, &hdev->dev_flags); |
| |
| hci_dev_close(hdev->id); |
| } |
| |
| static void hci_discov_off(struct work_struct *work) |
| { |
| struct hci_dev *hdev; |
| u8 scan = SCAN_PAGE; |
| |
| hdev = container_of(work, struct hci_dev, discov_off.work); |
| |
| BT_DBG("%s", hdev->name); |
| |
| hci_dev_lock(hdev); |
| |
| hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan); |
| |
| hdev->discov_timeout = 0; |
| |
| hci_dev_unlock(hdev); |
| } |
| |
| int hci_uuids_clear(struct hci_dev *hdev) |
| { |
| struct list_head *p, *n; |
| |
| list_for_each_safe(p, n, &hdev->uuids) { |
| struct bt_uuid *uuid; |
| |
| uuid = list_entry(p, struct bt_uuid, list); |
| |
| list_del(p); |
| kfree(uuid); |
| } |
| |
| return 0; |
| } |
| |
| int hci_link_keys_clear(struct hci_dev *hdev) |
| { |
| struct list_head *p, *n; |
| |
| list_for_each_safe(p, n, &hdev->link_keys) { |
| struct link_key *key; |
| |
| key = list_entry(p, struct link_key, list); |
| |
| list_del(p); |
| kfree(key); |
| } |
| |
| return 0; |
| } |
| |
| int hci_smp_ltks_clear(struct hci_dev *hdev) |
| { |
| struct smp_ltk *k, *tmp; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
| list_del(&k->list); |
| kfree(k); |
| } |
| |
| return 0; |
| } |
| |
| struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct link_key *k; |
| |
| list_for_each_entry(k, &hdev->link_keys, list) |
| if (bacmp(bdaddr, &k->bdaddr) == 0) |
| return k; |
| |
| return NULL; |
| } |
| |
| static int hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
| u8 key_type, u8 old_key_type) |
| { |
| /* Legacy key */ |
| if (key_type < 0x03) |
| return 1; |
| |
| /* Debug keys are insecure so don't store them persistently */ |
| if (key_type == HCI_LK_DEBUG_COMBINATION) |
| return 0; |
| |
| /* Changed combination key and there's no previous one */ |
| if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) |
| return 0; |
| |
| /* Security mode 3 case */ |
| if (!conn) |
| return 1; |
| |
| /* Neither local nor remote side had no-bonding as requirement */ |
| if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) |
| return 1; |
| |
| /* Local side had dedicated bonding as requirement */ |
| if (conn->auth_type == 0x02 || conn->auth_type == 0x03) |
| return 1; |
| |
| /* Remote side had dedicated bonding as requirement */ |
| if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) |
| return 1; |
| |
| /* If none of the above criteria match, then don't store the key |
| * persistently */ |
| return 0; |
| } |
| |
| struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8]) |
| { |
| struct smp_ltk *k; |
| |
| list_for_each_entry(k, &hdev->long_term_keys, list) { |
| if (k->ediv != ediv || |
| memcmp(rand, k->rand, sizeof(k->rand))) |
| continue; |
| |
| return k; |
| } |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(hci_find_ltk); |
| |
| struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 addr_type) |
| { |
| struct smp_ltk *k; |
| |
| list_for_each_entry(k, &hdev->long_term_keys, list) |
| if (addr_type == k->bdaddr_type && |
| bacmp(bdaddr, &k->bdaddr) == 0) |
| return k; |
| |
| return NULL; |
| } |
| EXPORT_SYMBOL(hci_find_ltk_by_addr); |
| |
| int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key, |
| bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len) |
| { |
| struct link_key *key, *old_key; |
| u8 old_key_type, persistent; |
| |
| old_key = hci_find_link_key(hdev, bdaddr); |
| if (old_key) { |
| old_key_type = old_key->type; |
| key = old_key; |
| } else { |
| old_key_type = conn ? conn->key_type : 0xff; |
| key = kzalloc(sizeof(*key), GFP_ATOMIC); |
| if (!key) |
| return -ENOMEM; |
| list_add(&key->list, &hdev->link_keys); |
| } |
| |
| BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type); |
| |
| /* Some buggy controller combinations generate a changed |
| * combination key for legacy pairing even when there's no |
| * previous key */ |
| if (type == HCI_LK_CHANGED_COMBINATION && |
| (!conn || conn->remote_auth == 0xff) && |
| old_key_type == 0xff) { |
| type = HCI_LK_COMBINATION; |
| if (conn) |
| conn->key_type = type; |
| } |
| |
| bacpy(&key->bdaddr, bdaddr); |
| memcpy(key->val, val, 16); |
| key->pin_len = pin_len; |
| |
| if (type == HCI_LK_CHANGED_COMBINATION) |
| key->type = old_key_type; |
| else |
| key->type = type; |
| |
| if (!new_key) |
| return 0; |
| |
| persistent = hci_persistent_key(hdev, conn, type, old_key_type); |
| |
| mgmt_new_link_key(hdev, key, persistent); |
| |
| if (!persistent) { |
| list_del(&key->list); |
| kfree(key); |
| } |
| |
| return 0; |
| } |
| |
| int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type, |
| int new_key, u8 authenticated, u8 tk[16], |
| u8 enc_size, u16 ediv, u8 rand[8]) |
| { |
| struct smp_ltk *key, *old_key; |
| |
| if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK)) |
| return 0; |
| |
| old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type); |
| if (old_key) |
| key = old_key; |
| else { |
| key = kzalloc(sizeof(*key), GFP_ATOMIC); |
| if (!key) |
| return -ENOMEM; |
| list_add(&key->list, &hdev->long_term_keys); |
| } |
| |
| bacpy(&key->bdaddr, bdaddr); |
| key->bdaddr_type = addr_type; |
| memcpy(key->val, tk, sizeof(key->val)); |
| key->authenticated = authenticated; |
| key->ediv = ediv; |
| key->enc_size = enc_size; |
| key->type = type; |
| memcpy(key->rand, rand, sizeof(key->rand)); |
| |
| if (!new_key) |
| return 0; |
| |
| if (type & HCI_SMP_LTK) |
| mgmt_new_ltk(hdev, key, 1); |
| |
| return 0; |
| } |
| |
| int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct link_key *key; |
| |
| key = hci_find_link_key(hdev, bdaddr); |
| if (!key) |
| return -ENOENT; |
| |
| BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); |
| |
| list_del(&key->list); |
| kfree(key); |
| |
| return 0; |
| } |
| |
| int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct smp_ltk *k, *tmp; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
| if (bacmp(bdaddr, &k->bdaddr)) |
| continue; |
| |
| BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); |
| |
| list_del(&k->list); |
| kfree(k); |
| } |
| |
| return 0; |
| } |
| |
| /* HCI command timer function */ |
| static void hci_cmd_timer(unsigned long arg) |
| { |
| struct hci_dev *hdev = (void *) arg; |
| |
| BT_ERR("%s command tx timeout", hdev->name); |
| atomic_set(&hdev->cmd_cnt, 1); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| } |
| |
| struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
| bdaddr_t *bdaddr) |
| { |
| struct oob_data *data; |
| |
| list_for_each_entry(data, &hdev->remote_oob_data, list) |
| if (bacmp(bdaddr, &data->bdaddr) == 0) |
| return data; |
| |
| return NULL; |
| } |
| |
| int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct oob_data *data; |
| |
| data = hci_find_remote_oob_data(hdev, bdaddr); |
| if (!data) |
| return -ENOENT; |
| |
| BT_DBG("%s removing %s", hdev->name, batostr(bdaddr)); |
| |
| list_del(&data->list); |
| kfree(data); |
| |
| return 0; |
| } |
| |
| int hci_remote_oob_data_clear(struct hci_dev *hdev) |
| { |
| struct oob_data *data, *n; |
| |
| list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { |
| list_del(&data->list); |
| kfree(data); |
| } |
| |
| return 0; |
| } |
| |
| int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash, |
| u8 *randomizer) |
| { |
| struct oob_data *data; |
| |
| data = hci_find_remote_oob_data(hdev, bdaddr); |
| |
| if (!data) { |
| data = kmalloc(sizeof(*data), GFP_ATOMIC); |
| if (!data) |
| return -ENOMEM; |
| |
| bacpy(&data->bdaddr, bdaddr); |
| list_add(&data->list, &hdev->remote_oob_data); |
| } |
| |
| memcpy(data->hash, hash, sizeof(data->hash)); |
| memcpy(data->randomizer, randomizer, sizeof(data->randomizer)); |
| |
| BT_DBG("%s for %s", hdev->name, batostr(bdaddr)); |
| |
| return 0; |
| } |
| |
| struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, |
| bdaddr_t *bdaddr) |
| { |
| struct bdaddr_list *b; |
| |
| list_for_each_entry(b, &hdev->blacklist, list) |
| if (bacmp(bdaddr, &b->bdaddr) == 0) |
| return b; |
| |
| return NULL; |
| } |
| |
| int hci_blacklist_clear(struct hci_dev *hdev) |
| { |
| struct list_head *p, *n; |
| |
| list_for_each_safe(p, n, &hdev->blacklist) { |
| struct bdaddr_list *b; |
| |
| b = list_entry(p, struct bdaddr_list, list); |
| |
| list_del(p); |
| kfree(b); |
| } |
| |
| return 0; |
| } |
| |
| int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct bdaddr_list *entry; |
| |
| if (bacmp(bdaddr, BDADDR_ANY) == 0) |
| return -EBADF; |
| |
| if (hci_blacklist_lookup(hdev, bdaddr)) |
| return -EEXIST; |
| |
| entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL); |
| if (!entry) |
| return -ENOMEM; |
| |
| bacpy(&entry->bdaddr, bdaddr); |
| |
| list_add(&entry->list, &hdev->blacklist); |
| |
| return mgmt_device_blocked(hdev, bdaddr); |
| } |
| |
| int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct bdaddr_list *entry; |
| |
| if (bacmp(bdaddr, BDADDR_ANY) == 0) |
| return hci_blacklist_clear(hdev); |
| |
| entry = hci_blacklist_lookup(hdev, bdaddr); |
| if (!entry) |
| return -ENOENT; |
| |
| list_del(&entry->list); |
| kfree(entry); |
| |
| return mgmt_device_unblocked(hdev, bdaddr); |
| } |
| |
| static void hci_clear_adv_cache(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, |
| adv_work.work); |
| |
| hci_dev_lock(hdev); |
| |
| hci_adv_entries_clear(hdev); |
| |
| hci_dev_unlock(hdev); |
| } |
| |
| int hci_adv_entries_clear(struct hci_dev *hdev) |
| { |
| struct adv_entry *entry, *tmp; |
| |
| list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) { |
| list_del(&entry->list); |
| kfree(entry); |
| } |
| |
| BT_DBG("%s adv cache cleared", hdev->name); |
| |
| return 0; |
| } |
| |
| struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct adv_entry *entry; |
| |
| list_for_each_entry(entry, &hdev->adv_entries, list) |
| if (bacmp(bdaddr, &entry->bdaddr) == 0) |
| return entry; |
| |
| return NULL; |
| } |
| |
| static inline int is_connectable_adv(u8 evt_type) |
| { |
| if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND) |
| return 1; |
| |
| return 0; |
| } |
| |
| int hci_add_adv_entry(struct hci_dev *hdev, |
| struct hci_ev_le_advertising_info *ev) |
| { |
| struct adv_entry *entry; |
| |
| if (!is_connectable_adv(ev->evt_type)) |
| return -EINVAL; |
| |
| /* Only new entries should be added to adv_entries. So, if |
| * bdaddr was found, don't add it. */ |
| if (hci_find_adv_entry(hdev, &ev->bdaddr)) |
| return 0; |
| |
| entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| if (!entry) |
| return -ENOMEM; |
| |
| bacpy(&entry->bdaddr, &ev->bdaddr); |
| entry->bdaddr_type = ev->bdaddr_type; |
| |
| list_add(&entry->list, &hdev->adv_entries); |
| |
| BT_DBG("%s adv entry added: address %s type %u", hdev->name, |
| batostr(&entry->bdaddr), entry->bdaddr_type); |
| |
| return 0; |
| } |
| |
| /* Register HCI device */ |
| int hci_register_dev(struct hci_dev *hdev) |
| { |
| struct list_head *head = &hci_dev_list, *p; |
| int i, id, error; |
| |
| BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
| |
| if (!hdev->open || !hdev->close) |
| return -EINVAL; |
| |
| /* Do not allow HCI_AMP devices to register at index 0, |
| * so the index can be used as the AMP controller ID. |
| */ |
| id = (hdev->dev_type == HCI_BREDR) ? 0 : 1; |
| |
| write_lock(&hci_dev_list_lock); |
| |
| /* Find first available device id */ |
| list_for_each(p, &hci_dev_list) { |
| if (list_entry(p, struct hci_dev, list)->id != id) |
| break; |
| head = p; id++; |
| } |
| |
| sprintf(hdev->name, "hci%d", id); |
| hdev->id = id; |
| list_add_tail(&hdev->list, head); |
| |
| mutex_init(&hdev->lock); |
| |
| hdev->flags = 0; |
| hdev->dev_flags = 0; |
| hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
| hdev->esco_type = (ESCO_HV1); |
| hdev->link_mode = (HCI_LM_ACCEPT); |
| hdev->io_capability = 0x03; /* No Input No Output */ |
| |
| hdev->idle_timeout = 0; |
| hdev->sniff_max_interval = 800; |
| hdev->sniff_min_interval = 80; |
| |
| INIT_WORK(&hdev->rx_work, hci_rx_work); |
| INIT_WORK(&hdev->cmd_work, hci_cmd_work); |
| INIT_WORK(&hdev->tx_work, hci_tx_work); |
| |
| |
| skb_queue_head_init(&hdev->rx_q); |
| skb_queue_head_init(&hdev->cmd_q); |
| skb_queue_head_init(&hdev->raw_q); |
| |
| setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev); |
| |
| for (i = 0; i < NUM_REASSEMBLY; i++) |
| hdev->reassembly[i] = NULL; |
| |
| init_waitqueue_head(&hdev->req_wait_q); |
| mutex_init(&hdev->req_lock); |
| |
| discovery_init(hdev); |
| |
| hci_conn_hash_init(hdev); |
| |
| INIT_LIST_HEAD(&hdev->mgmt_pending); |
| |
| INIT_LIST_HEAD(&hdev->blacklist); |
| |
| INIT_LIST_HEAD(&hdev->uuids); |
| |
| INIT_LIST_HEAD(&hdev->link_keys); |
| INIT_LIST_HEAD(&hdev->long_term_keys); |
| |
| INIT_LIST_HEAD(&hdev->remote_oob_data); |
| |
| INIT_LIST_HEAD(&hdev->adv_entries); |
| |
| INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache); |
| INIT_WORK(&hdev->power_on, hci_power_on); |
| INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
| |
| INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off); |
| |
| memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| |
| atomic_set(&hdev->promisc, 0); |
| |
| write_unlock(&hci_dev_list_lock); |
| |
| hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND | |
| WQ_MEM_RECLAIM, 1); |
| if (!hdev->workqueue) { |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| error = hci_add_sysfs(hdev); |
| if (error < 0) |
| goto err_wqueue; |
| |
| hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
| RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev); |
| if (hdev->rfkill) { |
| if (rfkill_register(hdev->rfkill) < 0) { |
| rfkill_destroy(hdev->rfkill); |
| hdev->rfkill = NULL; |
| } |
| } |
| |
| set_bit(HCI_AUTO_OFF, &hdev->dev_flags); |
| set_bit(HCI_SETUP, &hdev->dev_flags); |
| schedule_work(&hdev->power_on); |
| |
| hci_notify(hdev, HCI_DEV_REG); |
| hci_dev_hold(hdev); |
| |
| return id; |
| |
| err_wqueue: |
| destroy_workqueue(hdev->workqueue); |
| err: |
| write_lock(&hci_dev_list_lock); |
| list_del(&hdev->list); |
| write_unlock(&hci_dev_list_lock); |
| |
| return error; |
| } |
| EXPORT_SYMBOL(hci_register_dev); |
| |
| /* Unregister HCI device */ |
| void hci_unregister_dev(struct hci_dev *hdev) |
| { |
| int i; |
| |
| BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
| |
| write_lock(&hci_dev_list_lock); |
| list_del(&hdev->list); |
| write_unlock(&hci_dev_list_lock); |
| |
| hci_dev_do_close(hdev); |
| |
| for (i = 0; i < NUM_REASSEMBLY; i++) |
| kfree_skb(hdev->reassembly[i]); |
| |
| if (!test_bit(HCI_INIT, &hdev->flags) && |
| !test_bit(HCI_SETUP, &hdev->dev_flags)) { |
| hci_dev_lock(hdev); |
| mgmt_index_removed(hdev); |
| hci_dev_unlock(hdev); |
| } |
| |
| /* mgmt_index_removed should take care of emptying the |
| * pending list */ |
| BUG_ON(!list_empty(&hdev->mgmt_pending)); |
| |
| hci_notify(hdev, HCI_DEV_UNREG); |
| |
| if (hdev->rfkill) { |
| rfkill_unregister(hdev->rfkill); |
| rfkill_destroy(hdev->rfkill); |
| } |
| |
| hci_del_sysfs(hdev); |
| |
| cancel_delayed_work_sync(&hdev->adv_work); |
| |
| destroy_workqueue(hdev->workqueue); |
| |
| hci_dev_lock(hdev); |
| hci_blacklist_clear(hdev); |
| hci_uuids_clear(hdev); |
| hci_link_keys_clear(hdev); |
| hci_smp_ltks_clear(hdev); |
| hci_remote_oob_data_clear(hdev); |
| hci_adv_entries_clear(hdev); |
| hci_dev_unlock(hdev); |
| |
| hci_dev_put(hdev); |
| } |
| EXPORT_SYMBOL(hci_unregister_dev); |
| |
| /* Suspend HCI device */ |
| int hci_suspend_dev(struct hci_dev *hdev) |
| { |
| hci_notify(hdev, HCI_DEV_SUSPEND); |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_suspend_dev); |
| |
| /* Resume HCI device */ |
| int hci_resume_dev(struct hci_dev *hdev) |
| { |
| hci_notify(hdev, HCI_DEV_RESUME); |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_resume_dev); |
| |
| /* Receive frame from HCI drivers */ |
| int hci_recv_frame(struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = (struct hci_dev *) skb->dev; |
| if (!hdev || (!test_bit(HCI_UP, &hdev->flags) |
| && !test_bit(HCI_INIT, &hdev->flags))) { |
| kfree_skb(skb); |
| return -ENXIO; |
| } |
| |
| /* Incomming skb */ |
| bt_cb(skb)->incoming = 1; |
| |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| skb_queue_tail(&hdev->rx_q, skb); |
| queue_work(hdev->workqueue, &hdev->rx_work); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_recv_frame); |
| |
| static int hci_reassembly(struct hci_dev *hdev, int type, void *data, |
| int count, __u8 index) |
| { |
| int len = 0; |
| int hlen = 0; |
| int remain = count; |
| struct sk_buff *skb; |
| struct bt_skb_cb *scb; |
| |
| if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) || |
| index >= NUM_REASSEMBLY) |
| return -EILSEQ; |
| |
| skb = hdev->reassembly[index]; |
| |
| if (!skb) { |
| switch (type) { |
| case HCI_ACLDATA_PKT: |
| len = HCI_MAX_FRAME_SIZE; |
| hlen = HCI_ACL_HDR_SIZE; |
| break; |
| case HCI_EVENT_PKT: |
| len = HCI_MAX_EVENT_SIZE; |
| hlen = HCI_EVENT_HDR_SIZE; |
| break; |
| case HCI_SCODATA_PKT: |
| len = HCI_MAX_SCO_SIZE; |
| hlen = HCI_SCO_HDR_SIZE; |
| break; |
| } |
| |
| skb = bt_skb_alloc(len, GFP_ATOMIC); |
| if (!skb) |
| return -ENOMEM; |
| |
| scb = (void *) skb->cb; |
| scb->expect = hlen; |
| scb->pkt_type = type; |
| |
| skb->dev = (void *) hdev; |
| hdev->reassembly[index] = skb; |
| } |
| |
| while (count) { |
| scb = (void *) skb->cb; |
| len = min(scb->expect, (__u16)count); |
| |
| memcpy(skb_put(skb, len), data, len); |
| |
| count -= len; |
| data += len; |
| scb->expect -= len; |
| remain = count; |
| |
| switch (type) { |
| case HCI_EVENT_PKT: |
| if (skb->len == HCI_EVENT_HDR_SIZE) { |
| struct hci_event_hdr *h = hci_event_hdr(skb); |
| scb->expect = h->plen; |
| |
| if (skb_tailroom(skb) < scb->expect) { |
| kfree_skb(skb); |
| hdev->reassembly[index] = NULL; |
| return -ENOMEM; |
| } |
| } |
| break; |
| |
| case HCI_ACLDATA_PKT: |
| if (skb->len == HCI_ACL_HDR_SIZE) { |
| struct hci_acl_hdr *h = hci_acl_hdr(skb); |
| scb->expect = __le16_to_cpu(h->dlen); |
| |
| if (skb_tailroom(skb) < scb->expect) { |
| kfree_skb(skb); |
| hdev->reassembly[index] = NULL; |
| return -ENOMEM; |
| } |
| } |
| break; |
| |
| case HCI_SCODATA_PKT: |
| if (skb->len == HCI_SCO_HDR_SIZE) { |
| struct hci_sco_hdr *h = hci_sco_hdr(skb); |
| scb->expect = h->dlen; |
| |
| if (skb_tailroom(skb) < scb->expect) { |
| kfree_skb(skb); |
| hdev->reassembly[index] = NULL; |
| return -ENOMEM; |
| } |
| } |
| break; |
| } |
| |
| if (scb->expect == 0) { |
| /* Complete frame */ |
| |
| bt_cb(skb)->pkt_type = type; |
| hci_recv_frame(skb); |
| |
| hdev->reassembly[index] = NULL; |
| return remain; |
| } |
| } |
| |
| return remain; |
| } |
| |
| int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
| { |
| int rem = 0; |
| |
| if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
| return -EILSEQ; |
| |
| while (count) { |
| rem = hci_reassembly(hdev, type, data, count, type - 1); |
| if (rem < 0) |
| return rem; |
| |
| data += (count - rem); |
| count = rem; |
| } |
| |
| return rem; |
| } |
| EXPORT_SYMBOL(hci_recv_fragment); |
| |
| #define STREAM_REASSEMBLY 0 |
| |
| int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count) |
| { |
| int type; |
| int rem = 0; |
| |
| while (count) { |
| struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY]; |
| |
| if (!skb) { |
| struct { char type; } *pkt; |
| |
| /* Start of the frame */ |
| pkt = data; |
| type = pkt->type; |
| |
| data++; |
| count--; |
| } else |
| type = bt_cb(skb)->pkt_type; |
| |
| rem = hci_reassembly(hdev, type, data, count, |
| STREAM_REASSEMBLY); |
| if (rem < 0) |
| return rem; |
| |
| data += (count - rem); |
| count = rem; |
| } |
| |
| return rem; |
| } |
| EXPORT_SYMBOL(hci_recv_stream_fragment); |
| |
| /* ---- Interface to upper protocols ---- */ |
| |
| int hci_register_cb(struct hci_cb *cb) |
| { |
| BT_DBG("%p name %s", cb, cb->name); |
| |
| write_lock(&hci_cb_list_lock); |
| list_add(&cb->list, &hci_cb_list); |
| write_unlock(&hci_cb_list_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_register_cb); |
| |
| int hci_unregister_cb(struct hci_cb *cb) |
| { |
| BT_DBG("%p name %s", cb, cb->name); |
| |
| write_lock(&hci_cb_list_lock); |
| list_del(&cb->list); |
| write_unlock(&hci_cb_list_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_unregister_cb); |
| |
| static int hci_send_frame(struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = (struct hci_dev *) skb->dev; |
| |
| if (!hdev) { |
| kfree_skb(skb); |
| return -ENODEV; |
| } |
| |
| BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
| |
| if (atomic_read(&hdev->promisc)) { |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| hci_send_to_sock(hdev, skb, NULL); |
| } |
| |
| /* Get rid of skb owner, prior to sending to the driver. */ |
| skb_orphan(skb); |
| |
| return hdev->send(skb); |
| } |
| |
| /* Send HCI command */ |
| int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
| { |
| int len = HCI_COMMAND_HDR_SIZE + plen; |
| struct hci_command_hdr *hdr; |
| struct sk_buff *skb; |
| |
| BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
| |
| skb = bt_skb_alloc(len, GFP_ATOMIC); |
| if (!skb) { |
| BT_ERR("%s no memory for command", hdev->name); |
| return -ENOMEM; |
| } |
| |
| hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); |
| hdr->opcode = cpu_to_le16(opcode); |
| hdr->plen = plen; |
| |
| if (plen) |
| memcpy(skb_put(skb, plen), param, plen); |
| |
| BT_DBG("skb len %d", skb->len); |
| |
| bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
| skb->dev = (void *) hdev; |
| |
| if (test_bit(HCI_INIT, &hdev->flags)) |
| hdev->init_last_cmd = opcode; |
| |
| skb_queue_tail(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| |
| return 0; |
| } |
| |
| /* Get data from the previously sent command */ |
| void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
| { |
| struct hci_command_hdr *hdr; |
| |
| if (!hdev->sent_cmd) |
| return NULL; |
| |
| hdr = (void *) hdev->sent_cmd->data; |
| |
| if (hdr->opcode != cpu_to_le16(opcode)) |
| return NULL; |
| |
| BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
| |
| return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; |
| } |
| |
| /* Send ACL data */ |
| static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) |
| { |
| struct hci_acl_hdr *hdr; |
| int len = skb->len; |
| |
| skb_push(skb, HCI_ACL_HDR_SIZE); |
| skb_reset_transport_header(skb); |
| hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
| hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
| hdr->dlen = cpu_to_le16(len); |
| } |
| |
| static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue, |
| struct sk_buff *skb, __u16 flags) |
| { |
| struct hci_dev *hdev = conn->hdev; |
| struct sk_buff *list; |
| |
| list = skb_shinfo(skb)->frag_list; |
| if (!list) { |
| /* Non fragmented */ |
| BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
| |
| skb_queue_tail(queue, skb); |
| } else { |
| /* Fragmented */ |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| skb_shinfo(skb)->frag_list = NULL; |
| |
| /* Queue all fragments atomically */ |
| spin_lock(&queue->lock); |
| |
| __skb_queue_tail(queue, skb); |
| |
| flags &= ~ACL_START; |
| flags |= ACL_CONT; |
| do { |
| skb = list; list = list->next; |
| |
| skb->dev = (void *) hdev; |
| bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
| hci_add_acl_hdr(skb, conn->handle, flags); |
| |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| __skb_queue_tail(queue, skb); |
| } while (list); |
| |
| spin_unlock(&queue->lock); |
| } |
| } |
| |
| void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) |
| { |
| struct hci_conn *conn = chan->conn; |
| struct hci_dev *hdev = conn->hdev; |
| |
| BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags); |
| |
| skb->dev = (void *) hdev; |
| bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
| hci_add_acl_hdr(skb, conn->handle, flags); |
| |
| hci_queue_acl(conn, &chan->data_q, skb, flags); |
| |
| queue_work(hdev->workqueue, &hdev->tx_work); |
| } |
| EXPORT_SYMBOL(hci_send_acl); |
| |
| /* Send SCO data */ |
| void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = conn->hdev; |
| struct hci_sco_hdr hdr; |
| |
| BT_DBG("%s len %d", hdev->name, skb->len); |
| |
| hdr.handle = cpu_to_le16(conn->handle); |
| hdr.dlen = skb->len; |
| |
| skb_push(skb, HCI_SCO_HDR_SIZE); |
| skb_reset_transport_header(skb); |
| memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
| |
| skb->dev = (void *) hdev; |
| bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
| |
| skb_queue_tail(&conn->data_q, skb); |
| queue_work(hdev->workqueue, &hdev->tx_work); |
| } |
| EXPORT_SYMBOL(hci_send_sco); |
| |
| /* ---- HCI TX task (outgoing data) ---- */ |
| |
| /* HCI Connection scheduler */ |
| static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *conn = NULL, *c; |
| int num = 0, min = ~0; |
| |
| /* We don't have to lock device here. Connections are always |
| * added and removed with TX task disabled. */ |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(c, &h->list, list) { |
| if (c->type != type || skb_queue_empty(&c->data_q)) |
| continue; |
| |
| if (c->state != BT_CONNECTED && c->state != BT_CONFIG) |
| continue; |
| |
| num++; |
| |
| if (c->sent < min) { |
| min = c->sent; |
| conn = c; |
| } |
| |
| if (hci_conn_num(hdev, type) == num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| if (conn) { |
| int cnt, q; |
| |
| switch (conn->type) { |
| case ACL_LINK: |
| cnt = hdev->acl_cnt; |
| break; |
| case SCO_LINK: |
| case ESCO_LINK: |
| cnt = hdev->sco_cnt; |
| break; |
| case LE_LINK: |
| cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
| break; |
| default: |
| cnt = 0; |
| BT_ERR("Unknown link type"); |
| } |
| |
| q = cnt / num; |
| *quote = q ? q : 1; |
| } else |
| *quote = 0; |
| |
| BT_DBG("conn %p quote %d", conn, *quote); |
| return conn; |
| } |
| |
| static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *c; |
| |
| BT_ERR("%s link tx timeout", hdev->name); |
| |
| rcu_read_lock(); |
| |
| /* Kill stalled connections */ |
| list_for_each_entry_rcu(c, &h->list, list) { |
| if (c->type == type && c->sent) { |
| BT_ERR("%s killing stalled connection %s", |
| hdev->name, batostr(&c->dst)); |
| hci_acl_disconn(c, 0x13); |
| } |
| } |
| |
| rcu_read_unlock(); |
| } |
| |
| static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
| int *quote) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_chan *chan = NULL; |
| int num = 0, min = ~0, cur_prio = 0; |
| struct hci_conn *conn; |
| int cnt, q, conn_num = 0; |
| |
| BT_DBG("%s", hdev->name); |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(conn, &h->list, list) { |
| struct hci_chan *tmp; |
| |
| if (conn->type != type) |
| continue; |
| |
| if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
| continue; |
| |
| conn_num++; |
| |
| list_for_each_entry_rcu(tmp, &conn->chan_list, list) { |
| struct sk_buff *skb; |
| |
| if (skb_queue_empty(&tmp->data_q)) |
| continue; |
| |
| skb = skb_peek(&tmp->data_q); |
| if (skb->priority < cur_prio) |
| continue; |
| |
| if (skb->priority > cur_prio) { |
| num = 0; |
| min = ~0; |
| cur_prio = skb->priority; |
| } |
| |
| num++; |
| |
| if (conn->sent < min) { |
| min = conn->sent; |
| chan = tmp; |
| } |
| } |
| |
| if (hci_conn_num(hdev, type) == conn_num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| if (!chan) |
| return NULL; |
| |
| switch (chan->conn->type) { |
| case ACL_LINK: |
| cnt = hdev->acl_cnt; |
| break; |
| case SCO_LINK: |
| case ESCO_LINK: |
| cnt = hdev->sco_cnt; |
| break; |
| case LE_LINK: |
| cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
| break; |
| default: |
| cnt = 0; |
| BT_ERR("Unknown link type"); |
| } |
| |
| q = cnt / num; |
| *quote = q ? q : 1; |
| BT_DBG("chan %p quote %d", chan, *quote); |
| return chan; |
| } |
| |
| static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *conn; |
| int num = 0; |
| |
| BT_DBG("%s", hdev->name); |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(conn, &h->list, list) { |
| struct hci_chan *chan; |
| |
| if (conn->type != type) |
| continue; |
| |
| if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
| continue; |
| |
| num++; |
| |
| list_for_each_entry_rcu(chan, &conn->chan_list, list) { |
| struct sk_buff *skb; |
| |
| if (chan->sent) { |
| chan->sent = 0; |
| continue; |
| } |
| |
| if (skb_queue_empty(&chan->data_q)) |
| continue; |
| |
| skb = skb_peek(&chan->data_q); |
| if (skb->priority >= HCI_PRIO_MAX - 1) |
| continue; |
| |
| skb->priority = HCI_PRIO_MAX - 1; |
| |
| BT_DBG("chan %p skb %p promoted to %d", chan, skb, |
| skb->priority); |
| } |
| |
| if (hci_conn_num(hdev, type) == num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| } |
| |
| static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| /* Calculate count of blocks used by this packet */ |
| return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len); |
| } |
| |
| static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt) |
| { |
| if (!test_bit(HCI_RAW, &hdev->flags)) { |
| /* ACL tx timeout must be longer than maximum |
| * link supervision timeout (40.9 seconds) */ |
| if (!cnt && time_after(jiffies, hdev->acl_last_tx + |
| msecs_to_jiffies(HCI_ACL_TX_TIMEOUT))) |
| hci_link_tx_to(hdev, ACL_LINK); |
| } |
| } |
| |
| static inline void hci_sched_acl_pkt(struct hci_dev *hdev) |
| { |
| unsigned int cnt = hdev->acl_cnt; |
| struct hci_chan *chan; |
| struct sk_buff *skb; |
| int quote; |
| |
| __check_timeout(hdev, cnt); |
| |
| while (hdev->acl_cnt && |
| (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { |
| u32 priority = (skb_peek(&chan->data_q))->priority; |
| while (quote-- && (skb = skb_peek(&chan->data_q))) { |
| BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
| skb->len, skb->priority); |
| |
| /* Stop if priority has changed */ |
| if (skb->priority < priority) |
| break; |
| |
| skb = skb_dequeue(&chan->data_q); |
| |
| hci_conn_enter_active_mode(chan->conn, |
| bt_cb(skb)->force_active); |
| |
| hci_send_frame(skb); |
| hdev->acl_last_tx = jiffies; |
| |
| hdev->acl_cnt--; |
| chan->sent++; |
| chan->conn->sent++; |
| } |
| } |
| |
| if (cnt != hdev->acl_cnt) |
| hci_prio_recalculate(hdev, ACL_LINK); |
| } |
| |
| static inline void hci_sched_acl_blk(struct hci_dev *hdev) |
| { |
| unsigned int cnt = hdev->block_cnt; |
| struct hci_chan *chan; |
| struct sk_buff *skb; |
| int quote; |
| |
| __check_timeout(hdev, cnt); |
| |
| while (hdev->block_cnt > 0 && |
| (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { |
| u32 priority = (skb_peek(&chan->data_q))->priority; |
| while (quote > 0 && (skb = skb_peek(&chan->data_q))) { |
| int blocks; |
| |
| BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
| skb->len, skb->priority); |
| |
| /* Stop if priority has changed */ |
| if (skb->priority < priority) |
| break; |
| |
| skb = skb_dequeue(&chan->data_q); |
| |
| blocks = __get_blocks(hdev, skb); |
| if (blocks > hdev->block_cnt) |
| return; |
| |
| hci_conn_enter_active_mode(chan->conn, |
| bt_cb(skb)->force_active); |
| |
| hci_send_frame(skb); |
| hdev->acl_last_tx = jiffies; |
| |
| hdev->block_cnt -= blocks; |
| quote -= blocks; |
| |
| chan->sent += blocks; |
| chan->conn->sent += blocks; |
| } |
| } |
| |
| if (cnt != hdev->block_cnt) |
| hci_prio_recalculate(hdev, ACL_LINK); |
| } |
| |
| static inline void hci_sched_acl(struct hci_dev *hdev) |
| { |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, ACL_LINK)) |
| return; |
| |
| switch (hdev->flow_ctl_mode) { |
| case HCI_FLOW_CTL_MODE_PACKET_BASED: |
| hci_sched_acl_pkt(hdev); |
| break; |
| |
| case HCI_FLOW_CTL_MODE_BLOCK_BASED: |
| hci_sched_acl_blk(hdev); |
| break; |
| } |
| } |
| |
| /* Schedule SCO */ |
| static inline void hci_sched_sco(struct hci_dev *hdev) |
| { |
| struct hci_conn *conn; |
| struct sk_buff *skb; |
| int quote; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, SCO_LINK)) |
| return; |
| |
| while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
| while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| BT_DBG("skb %p len %d", skb, skb->len); |
| hci_send_frame(skb); |
| |
| conn->sent++; |
| if (conn->sent == ~0) |
| conn->sent = 0; |
| } |
| } |
| } |
| |
| static inline void hci_sched_esco(struct hci_dev *hdev) |
| { |
| struct hci_conn *conn; |
| struct sk_buff *skb; |
| int quote; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, ESCO_LINK)) |
| return; |
| |
| while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
| while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| BT_DBG("skb %p len %d", skb, skb->len); |
| hci_send_frame(skb); |
| |
| conn->sent++; |
| if (conn->sent == ~0) |
| conn->sent = 0; |
| } |
| } |
| } |
| |
| static inline void hci_sched_le(struct hci_dev *hdev) |
| { |
| struct hci_chan *chan; |
| struct sk_buff *skb; |
| int quote, cnt, tmp; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, LE_LINK)) |
| return; |
| |
| if (!test_bit(HCI_RAW, &hdev->flags)) { |
| /* LE tx timeout must be longer than maximum |
| * link supervision timeout (40.9 seconds) */ |
| if (!hdev->le_cnt && hdev->le_pkts && |
| time_after(jiffies, hdev->le_last_tx + HZ * 45)) |
| hci_link_tx_to(hdev, LE_LINK); |
| } |
| |
| cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; |
| tmp = cnt; |
| while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) { |
| u32 priority = (skb_peek(&chan->data_q))->priority; |
| while (quote-- && (skb = skb_peek(&chan->data_q))) { |
| BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
| skb->len, skb->priority); |
| |
| /* Stop if priority has changed */ |
| if (skb->priority < priority) |
| break; |
| |
| skb = skb_dequeue(&chan->data_q); |
| |
| hci_send_frame(skb); |
| hdev->le_last_tx = jiffies; |
| |
| cnt--; |
| chan->sent++; |
| chan->conn->sent++; |
| } |
| } |
| |
| if (hdev->le_pkts) |
| hdev->le_cnt = cnt; |
| else |
| hdev->acl_cnt = cnt; |
| |
| if (cnt != tmp) |
| hci_prio_recalculate(hdev, LE_LINK); |
| } |
| |
| static void hci_tx_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt, |
| hdev->sco_cnt, hdev->le_cnt); |
| |
| /* Schedule queues and send stuff to HCI driver */ |
| |
| hci_sched_acl(hdev); |
| |
| hci_sched_sco(hdev); |
| |
| hci_sched_esco(hdev); |
| |
| hci_sched_le(hdev); |
| |
| /* Send next queued raw (unknown type) packet */ |
| while ((skb = skb_dequeue(&hdev->raw_q))) |
| hci_send_frame(skb); |
| } |
| |
| /* ----- HCI RX task (incoming data processing) ----- */ |
| |
| /* ACL data packet */ |
| static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_acl_hdr *hdr = (void *) skb->data; |
| struct hci_conn *conn; |
| __u16 handle, flags; |
| |
| skb_pull(skb, HCI_ACL_HDR_SIZE); |
| |
| handle = __le16_to_cpu(hdr->handle); |
| flags = hci_flags(handle); |
| handle = hci_handle(handle); |
| |
| BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); |
| |
| hdev->stat.acl_rx++; |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_handle(hdev, handle); |
| hci_dev_unlock(hdev); |
| |
| if (conn) { |
| hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF); |
| |
| /* Send to upper protocol */ |
| l2cap_recv_acldata(conn, skb, flags); |
| return; |
| } else { |
| BT_ERR("%s ACL packet for unknown connection handle %d", |
| hdev->name, handle); |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| /* SCO data packet */ |
| static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_sco_hdr *hdr = (void *) skb->data; |
| struct hci_conn *conn; |
| __u16 handle; |
| |
| skb_pull(skb, HCI_SCO_HDR_SIZE); |
| |
| handle = __le16_to_cpu(hdr->handle); |
| |
| BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); |
| |
| hdev->stat.sco_rx++; |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_handle(hdev, handle); |
| hci_dev_unlock(hdev); |
| |
| if (conn) { |
| /* Send to upper protocol */ |
| sco_recv_scodata(conn, skb); |
| return; |
| } else { |
| BT_ERR("%s SCO packet for unknown connection handle %d", |
| hdev->name, handle); |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| static void hci_rx_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s", hdev->name); |
| |
| while ((skb = skb_dequeue(&hdev->rx_q))) { |
| if (atomic_read(&hdev->promisc)) { |
| /* Send copy to the sockets */ |
| hci_send_to_sock(hdev, skb, NULL); |
| } |
| |
| if (test_bit(HCI_RAW, &hdev->flags)) { |
| kfree_skb(skb); |
| continue; |
| } |
| |
| if (test_bit(HCI_INIT, &hdev->flags)) { |
| /* Don't process data packets in this states. */ |
| switch (bt_cb(skb)->pkt_type) { |
| case HCI_ACLDATA_PKT: |
| case HCI_SCODATA_PKT: |
| kfree_skb(skb); |
| continue; |
| } |
| } |
| |
| /* Process frame */ |
| switch (bt_cb(skb)->pkt_type) { |
| case HCI_EVENT_PKT: |
| BT_DBG("%s Event packet", hdev->name); |
| hci_event_packet(hdev, skb); |
| break; |
| |
| case HCI_ACLDATA_PKT: |
| BT_DBG("%s ACL data packet", hdev->name); |
| hci_acldata_packet(hdev, skb); |
| break; |
| |
| case HCI_SCODATA_PKT: |
| BT_DBG("%s SCO data packet", hdev->name); |
| hci_scodata_packet(hdev, skb); |
| break; |
| |
| default: |
| kfree_skb(skb); |
| break; |
| } |
| } |
| } |
| |
| static void hci_cmd_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); |
| |
| /* Send queued commands */ |
| if (atomic_read(&hdev->cmd_cnt)) { |
| skb = skb_dequeue(&hdev->cmd_q); |
| if (!skb) |
| return; |
| |
| kfree_skb(hdev->sent_cmd); |
| |
| hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC); |
| if (hdev->sent_cmd) { |
| atomic_dec(&hdev->cmd_cnt); |
| hci_send_frame(skb); |
| if (test_bit(HCI_RESET, &hdev->flags)) |
| del_timer(&hdev->cmd_timer); |
| else |
| mod_timer(&hdev->cmd_timer, |
| jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT)); |
| } else { |
| skb_queue_head(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| } |
| } |
| } |
| |
| int hci_do_inquiry(struct hci_dev *hdev, u8 length) |
| { |
| /* General inquiry access code (GIAC) */ |
| u8 lap[3] = { 0x33, 0x8b, 0x9e }; |
| struct hci_cp_inquiry cp; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (test_bit(HCI_INQUIRY, &hdev->flags)) |
| return -EINPROGRESS; |
| |
| inquiry_cache_flush(hdev); |
| |
| memset(&cp, 0, sizeof(cp)); |
| memcpy(&cp.lap, lap, sizeof(cp.lap)); |
| cp.length = length; |
| |
| return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
| } |
| |
| int hci_cancel_inquiry(struct hci_dev *hdev) |
| { |
| BT_DBG("%s", hdev->name); |
| |
| if (!test_bit(HCI_INQUIRY, &hdev->flags)) |
| return -EPERM; |
| |
| return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL); |
| } |
| |
| module_param(enable_hs, bool, 0644); |
| MODULE_PARM_DESC(enable_hs, "Enable High Speed"); |