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|
- /*
- 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/export.h>
- #include <linux/idr.h>
- #include <linux/rfkill.h>
- #include <linux/debugfs.h>
- #include <linux/crypto.h>
- #include <asm/unaligned.h>
- #include <net/bluetooth/bluetooth.h>
- #include <net/bluetooth/hci_core.h>
- #include <net/bluetooth/l2cap.h>
- #include <net/bluetooth/mgmt.h>
- #include "hci_request.h"
- #include "hci_debugfs.h"
- #include "smp.h"
- 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_MUTEX(hci_cb_list_lock);
- /* HCI ID Numbering */
- static DEFINE_IDA(hci_index_ida);
- /* ----- HCI requests ----- */
- #define HCI_REQ_DONE 0
- #define HCI_REQ_PEND 1
- #define HCI_REQ_CANCELED 2
- #define hci_req_lock(d) mutex_lock(&d->req_lock)
- #define hci_req_unlock(d) mutex_unlock(&d->req_lock)
- /* ---- HCI debugfs entries ---- */
- static ssize_t dut_mode_read(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct hci_dev *hdev = file->private_data;
- char buf[3];
- buf[0] = hci_dev_test_flag(hdev, HCI_DUT_MODE) ? 'Y': 'N';
- buf[1] = '\n';
- buf[2] = '\0';
- return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
- }
- static ssize_t dut_mode_write(struct file *file, const char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct hci_dev *hdev = file->private_data;
- struct sk_buff *skb;
- char buf[32];
- size_t buf_size = min(count, (sizeof(buf)-1));
- bool enable;
- if (!test_bit(HCI_UP, &hdev->flags))
- return -ENETDOWN;
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = '\0';
- if (strtobool(buf, &enable))
- return -EINVAL;
- if (enable == hci_dev_test_flag(hdev, HCI_DUT_MODE))
- return -EALREADY;
- hci_req_lock(hdev);
- if (enable)
- skb = __hci_cmd_sync(hdev, HCI_OP_ENABLE_DUT_MODE, 0, NULL,
- HCI_CMD_TIMEOUT);
- else
- skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL,
- HCI_CMD_TIMEOUT);
- hci_req_unlock(hdev);
- if (IS_ERR(skb))
- return PTR_ERR(skb);
- kfree_skb(skb);
- hci_dev_change_flag(hdev, HCI_DUT_MODE);
- return count;
- }
- static const struct file_operations dut_mode_fops = {
- .open = simple_open,
- .read = dut_mode_read,
- .write = dut_mode_write,
- .llseek = default_llseek,
- };
- static ssize_t vendor_diag_read(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct hci_dev *hdev = file->private_data;
- char buf[3];
- buf[0] = hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) ? 'Y': 'N';
- buf[1] = '\n';
- buf[2] = '\0';
- return simple_read_from_buffer(user_buf, count, ppos, buf, 2);
- }
- static ssize_t vendor_diag_write(struct file *file, const char __user *user_buf,
- size_t count, loff_t *ppos)
- {
- struct hci_dev *hdev = file->private_data;
- char buf[32];
- size_t buf_size = min(count, (sizeof(buf)-1));
- bool enable;
- int err;
- if (copy_from_user(buf, user_buf, buf_size))
- return -EFAULT;
- buf[buf_size] = '\0';
- if (strtobool(buf, &enable))
- return -EINVAL;
- /* When the diagnostic flags are not persistent and the transport
- * is not active, then there is no need for the vendor callback.
- *
- * Instead just store the desired value. If needed the setting
- * will be programmed when the controller gets powered on.
- */
- if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
- !test_bit(HCI_RUNNING, &hdev->flags))
- goto done;
- hci_req_lock(hdev);
- err = hdev->set_diag(hdev, enable);
- hci_req_unlock(hdev);
- if (err < 0)
- return err;
- done:
- if (enable)
- hci_dev_set_flag(hdev, HCI_VENDOR_DIAG);
- else
- hci_dev_clear_flag(hdev, HCI_VENDOR_DIAG);
- return count;
- }
- static const struct file_operations vendor_diag_fops = {
- .open = simple_open,
- .read = vendor_diag_read,
- .write = vendor_diag_write,
- .llseek = default_llseek,
- };
- static void hci_debugfs_create_basic(struct hci_dev *hdev)
- {
- debugfs_create_file("dut_mode", 0644, hdev->debugfs, hdev,
- &dut_mode_fops);
- if (hdev->set_diag)
- debugfs_create_file("vendor_diag", 0644, hdev->debugfs, hdev,
- &vendor_diag_fops);
- }
- /* ---- HCI requests ---- */
- static void hci_req_sync_complete(struct hci_dev *hdev, u8 result, u16 opcode,
- struct sk_buff *skb)
- {
- BT_DBG("%s result 0x%2.2x", hdev->name, result);
- if (hdev->req_status == HCI_REQ_PEND) {
- hdev->req_result = result;
- hdev->req_status = HCI_REQ_DONE;
- if (skb)
- hdev->req_skb = skb_get(skb);
- 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);
- }
- }
- struct sk_buff *__hci_cmd_sync_ev(struct hci_dev *hdev, u16 opcode, u32 plen,
- const void *param, u8 event, u32 timeout)
- {
- DECLARE_WAITQUEUE(wait, current);
- struct hci_request req;
- struct sk_buff *skb;
- int err = 0;
- BT_DBG("%s", hdev->name);
- hci_req_init(&req, hdev);
- hci_req_add_ev(&req, opcode, plen, param, event);
- hdev->req_status = HCI_REQ_PEND;
- add_wait_queue(&hdev->req_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- err = hci_req_run_skb(&req, hci_req_sync_complete);
- if (err < 0) {
- remove_wait_queue(&hdev->req_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- return ERR_PTR(err);
- }
- schedule_timeout(timeout);
- remove_wait_queue(&hdev->req_wait_q, &wait);
- if (signal_pending(current))
- return ERR_PTR(-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;
- skb = hdev->req_skb;
- hdev->req_skb = NULL;
- BT_DBG("%s end: err %d", hdev->name, err);
- if (err < 0) {
- kfree_skb(skb);
- return ERR_PTR(err);
- }
- if (!skb)
- return ERR_PTR(-ENODATA);
- return skb;
- }
- EXPORT_SYMBOL(__hci_cmd_sync_ev);
- struct sk_buff *__hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
- const void *param, u32 timeout)
- {
- return __hci_cmd_sync_ev(hdev, opcode, plen, param, 0, timeout);
- }
- EXPORT_SYMBOL(__hci_cmd_sync);
- /* Execute request and wait for completion. */
- static int __hci_req_sync(struct hci_dev *hdev,
- void (*func)(struct hci_request *req,
- unsigned long opt),
- unsigned long opt, __u32 timeout)
- {
- struct hci_request req;
- DECLARE_WAITQUEUE(wait, current);
- int err = 0;
- BT_DBG("%s start", hdev->name);
- hci_req_init(&req, hdev);
- hdev->req_status = HCI_REQ_PEND;
- func(&req, opt);
- add_wait_queue(&hdev->req_wait_q, &wait);
- set_current_state(TASK_INTERRUPTIBLE);
- err = hci_req_run_skb(&req, hci_req_sync_complete);
- if (err < 0) {
- hdev->req_status = 0;
- remove_wait_queue(&hdev->req_wait_q, &wait);
- set_current_state(TASK_RUNNING);
- /* ENODATA means the HCI request command queue is empty.
- * This can happen when a request with conditionals doesn't
- * trigger any commands to be sent. This is normal behavior
- * and should not trigger an error return.
- */
- if (err == -ENODATA)
- return 0;
- return err;
- }
- 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 int hci_req_sync(struct hci_dev *hdev,
- void (*req)(struct hci_request *req,
- 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_req_sync(hdev, req, opt, timeout);
- hci_req_unlock(hdev);
- return ret;
- }
- static void hci_reset_req(struct hci_request *req, unsigned long opt)
- {
- BT_DBG("%s %ld", req->hdev->name, opt);
- /* Reset device */
- set_bit(HCI_RESET, &req->hdev->flags);
- hci_req_add(req, HCI_OP_RESET, 0, NULL);
- }
- static void bredr_init(struct hci_request *req)
- {
- req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
- /* Read Local Supported Features */
- hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
- /* Read Local Version */
- hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
- /* Read BD Address */
- hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
- }
- static void amp_init1(struct hci_request *req)
- {
- req->hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
- /* Read Local Version */
- hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
- /* Read Local Supported Commands */
- hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
- /* Read Local AMP Info */
- hci_req_add(req, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
- /* Read Data Blk size */
- hci_req_add(req, HCI_OP_READ_DATA_BLOCK_SIZE, 0, NULL);
- /* Read Flow Control Mode */
- hci_req_add(req, HCI_OP_READ_FLOW_CONTROL_MODE, 0, NULL);
- /* Read Location Data */
- hci_req_add(req, HCI_OP_READ_LOCATION_DATA, 0, NULL);
- }
- static void amp_init2(struct hci_request *req)
- {
- /* Read Local Supported Features. Not all AMP controllers
- * support this so it's placed conditionally in the second
- * stage init.
- */
- if (req->hdev->commands[14] & 0x20)
- hci_req_add(req, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
- }
- static void hci_init1_req(struct hci_request *req, unsigned long opt)
- {
- struct hci_dev *hdev = req->hdev;
- BT_DBG("%s %ld", hdev->name, opt);
- /* Reset */
- if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
- hci_reset_req(req, 0);
- switch (hdev->dev_type) {
- case HCI_BREDR:
- bredr_init(req);
- break;
- case HCI_AMP:
- amp_init1(req);
- break;
- default:
- BT_ERR("Unknown device type %d", hdev->dev_type);
- break;
- }
- }
- static void bredr_setup(struct hci_request *req)
- {
- __le16 param;
- __u8 flt_type;
- /* Read Buffer Size (ACL mtu, max pkt, etc.) */
- hci_req_add(req, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
- /* Read Class of Device */
- hci_req_add(req, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
- /* Read Local Name */
- hci_req_add(req, HCI_OP_READ_LOCAL_NAME, 0, NULL);
- /* Read Voice Setting */
- hci_req_add(req, HCI_OP_READ_VOICE_SETTING, 0, NULL);
- /* Read Number of Supported IAC */
- hci_req_add(req, HCI_OP_READ_NUM_SUPPORTED_IAC, 0, NULL);
- /* Read Current IAC LAP */
- hci_req_add(req, HCI_OP_READ_CURRENT_IAC_LAP, 0, NULL);
- /* Clear Event Filters */
- flt_type = HCI_FLT_CLEAR_ALL;
- hci_req_add(req, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
- /* Connection accept timeout ~20 secs */
- param = cpu_to_le16(0x7d00);
- hci_req_add(req, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m);
- }
- static void le_setup(struct hci_request *req)
- {
- struct hci_dev *hdev = req->hdev;
- /* Read LE Buffer Size */
- hci_req_add(req, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
- /* Read LE Local Supported Features */
- hci_req_add(req, HCI_OP_LE_READ_LOCAL_FEATURES, 0, NULL);
- /* Read LE Supported States */
- hci_req_add(req, HCI_OP_LE_READ_SUPPORTED_STATES, 0, NULL);
- /* LE-only controllers have LE implicitly enabled */
- if (!lmp_bredr_capable(hdev))
- hci_dev_set_flag(hdev, HCI_LE_ENABLED);
- }
- static void hci_setup_event_mask(struct hci_request *req)
- {
- struct hci_dev *hdev = req->hdev;
- /* The second byte is 0xff instead of 0x9f (two reserved bits
- * disabled) since a Broadcom 1.2 dongle doesn't respond to the
- * command otherwise.
- */
- u8 events[8] = { 0xff, 0xff, 0xfb, 0xff, 0x00, 0x00, 0x00, 0x00 };
- /* CSR 1.1 dongles does not accept any bitfield so don't try to set
- * any event mask for pre 1.2 devices.
- */
- if (hdev->hci_ver < BLUETOOTH_VER_1_2)
- return;
- if (lmp_bredr_capable(hdev)) {
- events[4] |= 0x01; /* Flow Specification Complete */
- events[4] |= 0x02; /* Inquiry Result with RSSI */
- events[4] |= 0x04; /* Read Remote Extended Features Complete */
- events[5] |= 0x08; /* Synchronous Connection Complete */
- events[5] |= 0x10; /* Synchronous Connection Changed */
- } else {
- /* Use a different default for LE-only devices */
- memset(events, 0, sizeof(events));
- events[0] |= 0x10; /* Disconnection Complete */
- events[1] |= 0x08; /* Read Remote Version Information Complete */
- events[1] |= 0x20; /* Command Complete */
- events[1] |= 0x40; /* Command Status */
- events[1] |= 0x80; /* Hardware Error */
- events[2] |= 0x04; /* Number of Completed Packets */
- events[3] |= 0x02; /* Data Buffer Overflow */
- if (hdev->le_features[0] & HCI_LE_ENCRYPTION) {
- events[0] |= 0x80; /* Encryption Change */
- events[5] |= 0x80; /* Encryption Key Refresh Complete */
- }
- }
- if (lmp_inq_rssi_capable(hdev))
- events[4] |= 0x02; /* Inquiry Result with RSSI */
- if (lmp_sniffsubr_capable(hdev))
- events[5] |= 0x20; /* Sniff Subrating */
- if (lmp_pause_enc_capable(hdev))
- events[5] |= 0x80; /* Encryption Key Refresh Complete */
- if (lmp_ext_inq_capable(hdev))
- events[5] |= 0x40; /* Extended Inquiry Result */
- if (lmp_no_flush_capable(hdev))
- events[7] |= 0x01; /* Enhanced Flush Complete */
- if (lmp_lsto_capable(hdev))
- events[6] |= 0x80; /* Link Supervision Timeout Changed */
- if (lmp_ssp_capable(hdev)) {
- events[6] |= 0x01; /* IO Capability Request */
- events[6] |= 0x02; /* IO Capability Response */
- events[6] |= 0x04; /* User Confirmation Request */
- events[6] |= 0x08; /* User Passkey Request */
- events[6] |= 0x10; /* Remote OOB Data Request */
- events[6] |= 0x20; /* Simple Pairing Complete */
- events[7] |= 0x04; /* User Passkey Notification */
- events[7] |= 0x08; /* Keypress Notification */
- events[7] |= 0x10; /* Remote Host Supported
- * Features Notification
- */
- }
- if (lmp_le_capable(hdev))
- events[7] |= 0x20; /* LE Meta-Event */
- hci_req_add(req, HCI_OP_SET_EVENT_MASK, sizeof(events), events);
- }
- static void hci_init2_req(struct hci_request *req, unsigned long opt)
- {
- struct hci_dev *hdev = req->hdev;
- if (hdev->dev_type == HCI_AMP)
- return amp_init2(req);
- if (lmp_bredr_capable(hdev))
- bredr_setup(req);
- else
- hci_dev_clear_flag(hdev, HCI_BREDR_ENABLED);
- if (lmp_le_capable(hdev))
- le_setup(req);
- /* All Bluetooth 1.2 and later controllers should support the
- * HCI command for reading the local supported commands.
- *
- * Unfortunately some controllers indicate Bluetooth 1.2 support,
- * but do not have support for this command. If that is the case,
- * the driver can quirk the behavior and skip reading the local
- * supported commands.
- */
- if (hdev->hci_ver > BLUETOOTH_VER_1_1 &&
- !test_bit(HCI_QUIRK_BROKEN_LOCAL_COMMANDS, &hdev->quirks))
- hci_req_add(req, HCI_OP_READ_LOCAL_COMMANDS, 0, NULL);
- if (lmp_ssp_capable(hdev)) {
- /* When SSP is available, then the host features page
- * should also be available as well. However some
- * controllers list the max_page as 0 as long as SSP
- * has not been enabled. To achieve proper debugging
- * output, force the minimum max_page to 1 at least.
- */
- hdev->max_page = 0x01;
- if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED)) {
- u8 mode = 0x01;
- hci_req_add(req, HCI_OP_WRITE_SSP_MODE,
- sizeof(mode), &mode);
- } else {
- struct hci_cp_write_eir cp;
- memset(hdev->eir, 0, sizeof(hdev->eir));
- memset(&cp, 0, sizeof(cp));
- hci_req_add(req, HCI_OP_WRITE_EIR, sizeof(cp), &cp);
- }
- }
- if (lmp_inq_rssi_capable(hdev) ||
- test_bit(HCI_QUIRK_FIXUP_INQUIRY_MODE, &hdev->quirks)) {
- u8 mode;
- /* If Extended Inquiry Result events are supported, then
- * they are clearly preferred over Inquiry Result with RSSI
- * events.
- */
- mode = lmp_ext_inq_capable(hdev) ? 0x02 : 0x01;
- hci_req_add(req, HCI_OP_WRITE_INQUIRY_MODE, 1, &mode);
- }
- if (lmp_inq_tx_pwr_capable(hdev))
- hci_req_add(req, HCI_OP_READ_INQ_RSP_TX_POWER, 0, NULL);
- if (lmp_ext_feat_capable(hdev)) {
- struct hci_cp_read_local_ext_features cp;
- cp.page = 0x01;
- hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
- sizeof(cp), &cp);
- }
- if (hci_dev_test_flag(hdev, HCI_LINK_SECURITY)) {
- u8 enable = 1;
- hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, sizeof(enable),
- &enable);
- }
- }
- static void hci_setup_link_policy(struct hci_request *req)
- {
- struct hci_dev *hdev = req->hdev;
- struct hci_cp_write_def_link_policy cp;
- u16 link_policy = 0;
- if (lmp_rswitch_capable(hdev))
- link_policy |= HCI_LP_RSWITCH;
- if (lmp_hold_capable(hdev))
- link_policy |= HCI_LP_HOLD;
- if (lmp_sniff_capable(hdev))
- link_policy |= HCI_LP_SNIFF;
- if (lmp_park_capable(hdev))
- link_policy |= HCI_LP_PARK;
- cp.policy = cpu_to_le16(link_policy);
- hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, sizeof(cp), &cp);
- }
- static void hci_set_le_support(struct hci_request *req)
- {
- struct hci_dev *hdev = req->hdev;
- struct hci_cp_write_le_host_supported cp;
- /* LE-only devices do not support explicit enablement */
- if (!lmp_bredr_capable(hdev))
- return;
- memset(&cp, 0, sizeof(cp));
- if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) {
- cp.le = 0x01;
- cp.simul = 0x00;
- }
- if (cp.le != lmp_host_le_capable(hdev))
- hci_req_add(req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(cp),
- &cp);
- }
- static void hci_set_event_mask_page_2(struct hci_request *req)
- {
- struct hci_dev *hdev = req->hdev;
- u8 events[8] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- bool changed = false;
- /* If Connectionless Slave Broadcast master role is supported
- * enable all necessary events for it.
- */
- if (lmp_csb_master_capable(hdev)) {
- events[1] |= 0x40; /* Triggered Clock Capture */
- events[1] |= 0x80; /* Synchronization Train Complete */
- events[2] |= 0x10; /* Slave Page Response Timeout */
- events[2] |= 0x20; /* CSB Channel Map Change */
- changed = true;
- }
- /* If Connectionless Slave Broadcast slave role is supported
- * enable all necessary events for it.
- */
- if (lmp_csb_slave_capable(hdev)) {
- events[2] |= 0x01; /* Synchronization Train Received */
- events[2] |= 0x02; /* CSB Receive */
- events[2] |= 0x04; /* CSB Timeout */
- events[2] |= 0x08; /* Truncated Page Complete */
- changed = true;
- }
- /* Enable Authenticated Payload Timeout Expired event if supported */
- if (lmp_ping_capable(hdev) || hdev->le_features[0] & HCI_LE_PING) {
- events[2] |= 0x80;
- changed = true;
- }
- /* Some Broadcom based controllers indicate support for Set Event
- * Mask Page 2 command, but then actually do not support it. Since
- * the default value is all bits set to zero, the command is only
- * required if the event mask has to be changed. In case no change
- * to the event mask is needed, skip this command.
- */
- if (changed)
- hci_req_add(req, HCI_OP_SET_EVENT_MASK_PAGE_2,
- sizeof(events), events);
- }
- static void hci_init3_req(struct hci_request *req, unsigned long opt)
- {
- struct hci_dev *hdev = req->hdev;
- u8 p;
- hci_setup_event_mask(req);
- if (hdev->commands[6] & 0x20 &&
- !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
- struct hci_cp_read_stored_link_key cp;
- bacpy(&cp.bdaddr, BDADDR_ANY);
- cp.read_all = 0x01;
- hci_req_add(req, HCI_OP_READ_STORED_LINK_KEY, sizeof(cp), &cp);
- }
- if (hdev->commands[5] & 0x10)
- hci_setup_link_policy(req);
- if (hdev->commands[8] & 0x01)
- hci_req_add(req, HCI_OP_READ_PAGE_SCAN_ACTIVITY, 0, NULL);
- /* Some older Broadcom based Bluetooth 1.2 controllers do not
- * support the Read Page Scan Type command. Check support for
- * this command in the bit mask of supported commands.
- */
- if (hdev->commands[13] & 0x01)
- hci_req_add(req, HCI_OP_READ_PAGE_SCAN_TYPE, 0, NULL);
- if (lmp_le_capable(hdev)) {
- u8 events[8];
- memset(events, 0, sizeof(events));
- events[0] = 0x0f;
- if (hdev->le_features[0] & HCI_LE_ENCRYPTION)
- events[0] |= 0x10; /* LE Long Term Key Request */
- /* If controller supports the Connection Parameters Request
- * Link Layer Procedure, enable the corresponding event.
- */
- if (hdev->le_features[0] & HCI_LE_CONN_PARAM_REQ_PROC)
- events[0] |= 0x20; /* LE Remote Connection
- * Parameter Request
- */
- /* If the controller supports the Data Length Extension
- * feature, enable the corresponding event.
- */
- if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT)
- events[0] |= 0x40; /* LE Data Length Change */
- /* If the controller supports Extended Scanner Filter
- * Policies, enable the correspondig event.
- */
- if (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY)
- events[1] |= 0x04; /* LE Direct Advertising
- * Report
- */
- /* If the controller supports the LE Read Local P-256
- * Public Key command, enable the corresponding event.
- */
- if (hdev->commands[34] & 0x02)
- events[0] |= 0x80; /* LE Read Local P-256
- * Public Key Complete
- */
- /* If the controller supports the LE Generate DHKey
- * command, enable the corresponding event.
- */
- if (hdev->commands[34] & 0x04)
- events[1] |= 0x01; /* LE Generate DHKey Complete */
- hci_req_add(req, HCI_OP_LE_SET_EVENT_MASK, sizeof(events),
- events);
- if (hdev->commands[25] & 0x40) {
- /* Read LE Advertising Channel TX Power */
- hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL);
- }
- if (hdev->commands[26] & 0x40) {
- /* Read LE White List Size */
- hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE,
- 0, NULL);
- }
- if (hdev->commands[26] & 0x80) {
- /* Clear LE White List */
- hci_req_add(req, HCI_OP_LE_CLEAR_WHITE_LIST, 0, NULL);
- }
- if (hdev->le_features[0] & HCI_LE_DATA_LEN_EXT) {
- /* Read LE Maximum Data Length */
- hci_req_add(req, HCI_OP_LE_READ_MAX_DATA_LEN, 0, NULL);
- /* Read LE Suggested Default Data Length */
- hci_req_add(req, HCI_OP_LE_READ_DEF_DATA_LEN, 0, NULL);
- }
- hci_set_le_support(req);
- }
- /* Read features beyond page 1 if available */
- for (p = 2; p < HCI_MAX_PAGES && p <= hdev->max_page; p++) {
- struct hci_cp_read_local_ext_features cp;
- cp.page = p;
- hci_req_add(req, HCI_OP_READ_LOCAL_EXT_FEATURES,
- sizeof(cp), &cp);
- }
- }
- static void hci_init4_req(struct hci_request *req, unsigned long opt)
- {
- struct hci_dev *hdev = req->hdev;
- /* Some Broadcom based Bluetooth controllers do not support the
- * Delete Stored Link Key command. They are clearly indicating its
- * absence in the bit mask of supported commands.
- *
- * Check the supported commands and only if the the command is marked
- * as supported send it. If not supported assume that the controller
- * does not have actual support for stored link keys which makes this
- * command redundant anyway.
- *
- * Some controllers indicate that they support handling deleting
- * stored link keys, but they don't. The quirk lets a driver
- * just disable this command.
- */
- if (hdev->commands[6] & 0x80 &&
- !test_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks)) {
- struct hci_cp_delete_stored_link_key cp;
- bacpy(&cp.bdaddr, BDADDR_ANY);
- cp.delete_all = 0x01;
- hci_req_add(req, HCI_OP_DELETE_STORED_LINK_KEY,
- sizeof(cp), &cp);
- }
- /* Set event mask page 2 if the HCI command for it is supported */
- if (hdev->commands[22] & 0x04)
- hci_set_event_mask_page_2(req);
- /* Read local codec list if the HCI command is supported */
- if (hdev->commands[29] & 0x20)
- hci_req_add(req, HCI_OP_READ_LOCAL_CODECS, 0, NULL);
- /* Get MWS transport configuration if the HCI command is supported */
- if (hdev->commands[30] & 0x08)
- hci_req_add(req, HCI_OP_GET_MWS_TRANSPORT_CONFIG, 0, NULL);
- /* Check for Synchronization Train support */
- if (lmp_sync_train_capable(hdev))
- hci_req_add(req, HCI_OP_READ_SYNC_TRAIN_PARAMS, 0, NULL);
- /* Enable Secure Connections if supported and configured */
- if (hci_dev_test_flag(hdev, HCI_SSP_ENABLED) &&
- bredr_sc_enabled(hdev)) {
- u8 support = 0x01;
- hci_req_add(req, HCI_OP_WRITE_SC_SUPPORT,
- sizeof(support), &support);
- }
- }
- static int __hci_init(struct hci_dev *hdev)
- {
- int err;
- err = __hci_req_sync(hdev, hci_init1_req, 0, HCI_INIT_TIMEOUT);
- if (err < 0)
- return err;
- if (hci_dev_test_flag(hdev, HCI_SETUP))
- hci_debugfs_create_basic(hdev);
- err = __hci_req_sync(hdev, hci_init2_req, 0, HCI_INIT_TIMEOUT);
- if (err < 0)
- return err;
- /* HCI_BREDR covers both single-mode LE, BR/EDR and dual-mode
- * BR/EDR/LE type controllers. AMP controllers only need the
- * first two stages of init.
- */
- if (hdev->dev_type != HCI_BREDR)
- return 0;
- err = __hci_req_sync(hdev, hci_init3_req, 0, HCI_INIT_TIMEOUT);
- if (err < 0)
- return err;
- err = __hci_req_sync(hdev, hci_init4_req, 0, HCI_INIT_TIMEOUT);
- if (err < 0)
- return err;
- /* This function is only called when the controller is actually in
- * configured state. When the controller is marked as unconfigured,
- * this initialization procedure is not run.
- *
- * It means that it is possible that a controller runs through its
- * setup phase and then discovers missing settings. If that is the
- * case, then this function will not be called. It then will only
- * be called during the config phase.
- *
- * So only when in setup phase or config phase, create the debugfs
- * entries and register the SMP channels.
- */
- if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG))
- return 0;
- hci_debugfs_create_common(hdev);
- if (lmp_bredr_capable(hdev))
- hci_debugfs_create_bredr(hdev);
- if (lmp_le_capable(hdev))
- hci_debugfs_create_le(hdev);
- return 0;
- }
- static void hci_init0_req(struct hci_request *req, unsigned long opt)
- {
- struct hci_dev *hdev = req->hdev;
- BT_DBG("%s %ld", hdev->name, opt);
- /* Reset */
- if (!test_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks))
- hci_reset_req(req, 0);
- /* Read Local Version */
- hci_req_add(req, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
- /* Read BD Address */
- if (hdev->set_bdaddr)
- hci_req_add(req, HCI_OP_READ_BD_ADDR, 0, NULL);
- }
- static int __hci_unconf_init(struct hci_dev *hdev)
- {
- int err;
- if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
- return 0;
- err = __hci_req_sync(hdev, hci_init0_req, 0, HCI_INIT_TIMEOUT);
- if (err < 0)
- return err;
- if (hci_dev_test_flag(hdev, HCI_SETUP))
- hci_debugfs_create_basic(hdev);
- return 0;
- }
- static void hci_scan_req(struct hci_request *req, unsigned long opt)
- {
- __u8 scan = opt;
- BT_DBG("%s %x", req->hdev->name, scan);
- /* Inquiry and Page scans */
- hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
- }
- static void hci_auth_req(struct hci_request *req, unsigned long opt)
- {
- __u8 auth = opt;
- BT_DBG("%s %x", req->hdev->name, auth);
- /* Authentication */
- hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
- }
- static void hci_encrypt_req(struct hci_request *req, unsigned long opt)
- {
- __u8 encrypt = opt;
- BT_DBG("%s %x", req->hdev->name, encrypt);
- /* Encryption */
- hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
- }
- static void hci_linkpol_req(struct hci_request *req, unsigned long opt)
- {
- __le16 policy = cpu_to_le16(opt);
- BT_DBG("%s %x", req->hdev->name, policy);
- /* Default link policy */
- hci_req_add(req, 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;
- switch (discov->state) {
- case DISCOVERY_FINDING:
- case DISCOVERY_RESOLVING:
- return true;
- default:
- return false;
- }
- }
- void hci_discovery_set_state(struct hci_dev *hdev, int state)
- {
- int old_state = hdev->discovery.state;
- BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
- if (old_state == state)
- return;
- hdev->discovery.state = state;
- switch (state) {
- case DISCOVERY_STOPPED:
- hci_update_background_scan(hdev);
- if (old_state != DISCOVERY_STARTING)
- mgmt_discovering(hdev, 0);
- break;
- case DISCOVERY_STARTING:
- break;
- case DISCOVERY_FINDING:
- mgmt_discovering(hdev, 1);
- break;
- case DISCOVERY_RESOLVING:
- break;
- case DISCOVERY_STOPPING:
- break;
- }
- }
- void hci_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);
- }
- 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, %pMR", cache, 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, %pMR", cache, 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 %pMR state %d", cache, 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);
- }
- u32 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;
- u32 flags = 0;
- BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
- hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
- if (!data->ssp_mode)
- flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
- ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
- if (ie) {
- if (!ie->data.ssp_mode)
- flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
- 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(*ie), GFP_KERNEL);
- if (!ie) {
- flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
- goto done;
- }
- 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)
- flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
- done:
- return flags;
- }
- 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_request *req, unsigned long opt)
- {
- struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
- struct hci_dev *hdev = req->hdev;
- 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_req_add(req, 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;
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- err = -EBUSY;
- goto done;
- }
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- if (hdev->dev_type != HCI_BREDR) {
- err = -EOPNOTSUPP;
- goto done;
- }
- if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- hci_dev_lock(hdev);
- if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
- inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
- hci_inquiry_cache_flush(hdev);
- do_inquiry = 1;
- }
- hci_dev_unlock(hdev);
- timeo = ir.length * msecs_to_jiffies(2000);
- if (do_inquiry) {
- err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
- timeo);
- if (err < 0)
- goto done;
- /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
- * cleared). If it is interrupted by a signal, return -EINTR.
- */
- if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
- TASK_INTERRUPTIBLE))
- return -EINTR;
- }
- /* 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;
- }
- static int hci_dev_do_open(struct hci_dev *hdev)
- {
- int ret = 0;
- BT_DBG("%s %p", hdev->name, hdev);
- hci_req_lock(hdev);
- if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
- ret = -ENODEV;
- goto done;
- }
- if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG)) {
- /* Check for rfkill but allow the HCI setup stage to
- * proceed (which in itself doesn't cause any RF activity).
- */
- if (hci_dev_test_flag(hdev, HCI_RFKILLED)) {
- ret = -ERFKILL;
- goto done;
- }
- /* Check for valid public address or a configured static
- * random adddress, but let the HCI setup proceed to
- * be able to determine if there is a public address
- * or not.
- *
- * In case of user channel usage, it is not important
- * if a public address or static random address is
- * available.
- *
- * This check is only valid for BR/EDR controllers
- * since AMP controllers do not have an address.
- */
- if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
- hdev->dev_type == HCI_BREDR &&
- !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
- !bacmp(&hdev->static_addr, BDADDR_ANY)) {
- ret = -EADDRNOTAVAIL;
- goto done;
- }
- }
- if (test_bit(HCI_UP, &hdev->flags)) {
- ret = -EALREADY;
- goto done;
- }
- if (hdev->open(hdev)) {
- ret = -EIO;
- goto done;
- }
- set_bit(HCI_RUNNING, &hdev->flags);
- hci_sock_dev_event(hdev, HCI_DEV_OPEN);
- atomic_set(&hdev->cmd_cnt, 1);
- set_bit(HCI_INIT, &hdev->flags);
- if (hci_dev_test_flag(hdev, HCI_SETUP)) {
- hci_sock_dev_event(hdev, HCI_DEV_SETUP);
- if (hdev->setup)
- ret = hdev->setup(hdev);
- /* The transport driver can set these quirks before
- * creating the HCI device or in its setup callback.
- *
- * In case any of them is set, the controller has to
- * start up as unconfigured.
- */
- if (test_bit(HCI_QUIRK_EXTERNAL_CONFIG, &hdev->quirks) ||
- test_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks))
- hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
- /* For an unconfigured controller it is required to
- * read at least the version information provided by
- * the Read Local Version Information command.
- *
- * If the set_bdaddr driver callback is provided, then
- * also the original Bluetooth public device address
- * will be read using the Read BD Address command.
- */
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
- ret = __hci_unconf_init(hdev);
- }
- if (hci_dev_test_flag(hdev, HCI_CONFIG)) {
- /* If public address change is configured, ensure that
- * the address gets programmed. If the driver does not
- * support changing the public address, fail the power
- * on procedure.
- */
- if (bacmp(&hdev->public_addr, BDADDR_ANY) &&
- hdev->set_bdaddr)
- ret = hdev->set_bdaddr(hdev, &hdev->public_addr);
- else
- ret = -EADDRNOTAVAIL;
- }
- if (!ret) {
- if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
- !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- ret = __hci_init(hdev);
- if (!ret && hdev->post_init)
- ret = hdev->post_init(hdev);
- }
- }
- /* If the HCI Reset command is clearing all diagnostic settings,
- * then they need to be reprogrammed after the init procedure
- * completed.
- */
- if (test_bit(HCI_QUIRK_NON_PERSISTENT_DIAG, &hdev->quirks) &&
- hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
- ret = hdev->set_diag(hdev, true);
- clear_bit(HCI_INIT, &hdev->flags);
- if (!ret) {
- hci_dev_hold(hdev);
- hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
- set_bit(HCI_UP, &hdev->flags);
- hci_sock_dev_event(hdev, HCI_DEV_UP);
- if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG) &&
- !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
- !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
- hdev->dev_type == HCI_BREDR) {
- 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;
- }
- clear_bit(HCI_RUNNING, &hdev->flags);
- hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
- hdev->close(hdev);
- hdev->flags &= BIT(HCI_RAW);
- }
- done:
- hci_req_unlock(hdev);
- return ret;
- }
- /* ---- HCI ioctl helpers ---- */
- int hci_dev_open(__u16 dev)
- {
- struct hci_dev *hdev;
- int err;
- hdev = hci_dev_get(dev);
- if (!hdev)
- return -ENODEV;
- /* Devices that are marked as unconfigured can only be powered
- * up as user channel. Trying to bring them up as normal devices
- * will result into a failure. Only user channel operation is
- * possible.
- *
- * When this function is called for a user channel, the flag
- * HCI_USER_CHANNEL will be set first before attempting to
- * open the device.
- */
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
- !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- /* We need to ensure that no other power on/off work is pending
- * before proceeding to call hci_dev_do_open. This is
- * particularly important if the setup procedure has not yet
- * completed.
- */
- if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
- cancel_delayed_work(&hdev->power_off);
- /* After this call it is guaranteed that the setup procedure
- * has finished. This means that error conditions like RFKILL
- * or no valid public or static random address apply.
- */
- flush_workqueue(hdev->req_workqueue);
- /* For controllers not using the management interface and that
- * are brought up using legacy ioctl, set the HCI_BONDABLE bit
- * so that pairing works for them. Once the management interface
- * is in use this bit will be cleared again and userspace has
- * to explicitly enable it.
- */
- if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
- !hci_dev_test_flag(hdev, HCI_MGMT))
- hci_dev_set_flag(hdev, HCI_BONDABLE);
- err = hci_dev_do_open(hdev);
- done:
- hci_dev_put(hdev);
- return err;
- }
- /* This function requires the caller holds hdev->lock */
- static void hci_pend_le_actions_clear(struct hci_dev *hdev)
- {
- struct hci_conn_params *p;
- list_for_each_entry(p, &hdev->le_conn_params, list) {
- if (p->conn) {
- hci_conn_drop(p->conn);
- hci_conn_put(p->conn);
- p->conn = NULL;
- }
- list_del_init(&p->action);
- }
- BT_DBG("All LE pending actions cleared");
- }
- int hci_dev_do_close(struct hci_dev *hdev)
- {
- bool auto_off;
- BT_DBG("%s %p", hdev->name, hdev);
- if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
- !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
- test_bit(HCI_UP, &hdev->flags)) {
- /* Execute vendor specific shutdown routine */
- if (hdev->shutdown)
- hdev->shutdown(hdev);
- }
- cancel_delayed_work(&hdev->power_off);
- hci_req_cancel(hdev, ENODEV);
- hci_req_lock(hdev);
- if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
- cancel_delayed_work_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;
- hci_dev_clear_flag(hdev, HCI_DISCOVERABLE);
- hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
- }
- if (hci_dev_test_and_clear_flag(hdev, HCI_SERVICE_CACHE))
- cancel_delayed_work(&hdev->service_cache);
- cancel_delayed_work_sync(&hdev->le_scan_disable);
- cancel_delayed_work_sync(&hdev->le_scan_restart);
- if (hci_dev_test_flag(hdev, HCI_MGMT))
- cancel_delayed_work_sync(&hdev->rpa_expired);
- if (hdev->adv_instance_timeout) {
- cancel_delayed_work_sync(&hdev->adv_instance_expire);
- hdev->adv_instance_timeout = 0;
- }
- /* Avoid potential lockdep warnings from the *_flush() calls by
- * ensuring the workqueue is empty up front.
- */
- drain_workqueue(hdev->workqueue);
- hci_dev_lock(hdev);
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
- auto_off = hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF);
- if (!auto_off && hdev->dev_type == HCI_BREDR)
- mgmt_powered(hdev, 0);
- hci_inquiry_cache_flush(hdev);
- hci_pend_le_actions_clear(hdev);
- hci_conn_hash_flush(hdev);
- hci_dev_unlock(hdev);
- smp_unregister(hdev);
- hci_sock_dev_event(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_QUIRK_RESET_ON_CLOSE, &hdev->quirks) &&
- !auto_off && !hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- set_bit(HCI_INIT, &hdev->flags);
- __hci_req_sync(hdev, hci_reset_req, 0, HCI_CMD_TIMEOUT);
- 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) {
- cancel_delayed_work_sync(&hdev->cmd_timer);
- kfree_skb(hdev->sent_cmd);
- hdev->sent_cmd = NULL;
- }
- clear_bit(HCI_RUNNING, &hdev->flags);
- hci_sock_dev_event(hdev, HCI_DEV_CLOSE);
- /* After this point our queues are empty
- * and no tasks are scheduled. */
- hdev->close(hdev);
- /* Clear flags */
- hdev->flags &= BIT(HCI_RAW);
- hci_dev_clear_volatile_flags(hdev);
- /* Controller radio is available but is currently powered down */
- hdev->amp_status = AMP_STATUS_POWERED_DOWN;
- memset(hdev->eir, 0, sizeof(hdev->eir));
- memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
- bacpy(&hdev->random_addr, BDADDR_ANY);
- 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;
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- err = -EBUSY;
- goto done;
- }
- if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
- cancel_delayed_work(&hdev->power_off);
- err = hci_dev_do_close(hdev);
- done:
- hci_dev_put(hdev);
- return err;
- }
- static int hci_dev_do_reset(struct hci_dev *hdev)
- {
- int ret;
- BT_DBG("%s %p", hdev->name, hdev);
- hci_req_lock(hdev);
- /* Drop queues */
- skb_queue_purge(&hdev->rx_q);
- skb_queue_purge(&hdev->cmd_q);
- /* Avoid potential lockdep warnings from the *_flush() calls by
- * ensuring the workqueue is empty up front.
- */
- drain_workqueue(hdev->workqueue);
- hci_dev_lock(hdev);
- hci_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;
- ret = __hci_req_sync(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT);
- hci_req_unlock(hdev);
- return ret;
- }
- int hci_dev_reset(__u16 dev)
- {
- struct hci_dev *hdev;
- int err;
- hdev = hci_dev_get(dev);
- if (!hdev)
- return -ENODEV;
- if (!test_bit(HCI_UP, &hdev->flags)) {
- err = -ENETDOWN;
- goto done;
- }
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- err = -EBUSY;
- goto done;
- }
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- err = hci_dev_do_reset(hdev);
- done:
- hci_dev_put(hdev);
- return err;
- }
- int hci_dev_reset_stat(__u16 dev)
- {
- struct hci_dev *hdev;
- int ret = 0;
- hdev = hci_dev_get(dev);
- if (!hdev)
- return -ENODEV;
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- ret = -EBUSY;
- goto done;
- }
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- ret = -EOPNOTSUPP;
- goto done;
- }
- memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
- done:
- hci_dev_put(hdev);
- return ret;
- }
- static void hci_update_scan_state(struct hci_dev *hdev, u8 scan)
- {
- bool conn_changed, discov_changed;
- BT_DBG("%s scan 0x%02x", hdev->name, scan);
- if ((scan & SCAN_PAGE))
- conn_changed = !hci_dev_test_and_set_flag(hdev,
- HCI_CONNECTABLE);
- else
- conn_changed = hci_dev_test_and_clear_flag(hdev,
- HCI_CONNECTABLE);
- if ((scan & SCAN_INQUIRY)) {
- discov_changed = !hci_dev_test_and_set_flag(hdev,
- HCI_DISCOVERABLE);
- } else {
- hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
- discov_changed = hci_dev_test_and_clear_flag(hdev,
- HCI_DISCOVERABLE);
- }
- if (!hci_dev_test_flag(hdev, HCI_MGMT))
- return;
- if (conn_changed || discov_changed) {
- /* In case this was disabled through mgmt */
- hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
- if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
- mgmt_update_adv_data(hdev);
- mgmt_new_settings(hdev);
- }
- }
- 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;
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- err = -EBUSY;
- goto done;
- }
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- if (hdev->dev_type != HCI_BREDR) {
- err = -EOPNOTSUPP;
- goto done;
- }
- if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
- err = -EOPNOTSUPP;
- goto done;
- }
- switch (cmd) {
- case HCISETAUTH:
- err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
- 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_req_sync(hdev, hci_auth_req, dr.dev_opt,
- HCI_INIT_TIMEOUT);
- if (err)
- break;
- }
- err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
- HCI_INIT_TIMEOUT);
- break;
- case HCISETSCAN:
- err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
- HCI_INIT_TIMEOUT);
- /* Ensure that the connectable and discoverable states
- * get correctly modified as this was a non-mgmt change.
- */
- if (!err)
- hci_update_scan_state(hdev, dr.dev_opt);
- break;
- case HCISETLINKPOL:
- err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
- 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;
- }
- done:
- 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) {
- unsigned long flags = hdev->flags;
- /* When the auto-off is configured it means the transport
- * is running, but in that case still indicate that the
- * device is actually down.
- */
- if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
- flags &= ~BIT(HCI_UP);
- (dr + n)->dev_id = hdev->id;
- (dr + n)->dev_opt = 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;
- unsigned long flags;
- int err = 0;
- if (copy_from_user(&di, arg, sizeof(di)))
- return -EFAULT;
- hdev = hci_dev_get(di.dev_id);
- if (!hdev)
- return -ENODEV;
- /* When the auto-off is configured it means the transport
- * is running, but in that case still indicate that the
- * device is actually down.
- */
- if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
- flags = hdev->flags & ~BIT(HCI_UP);
- else
- flags = hdev->flags;
- strcpy(di.name, hdev->name);
- di.bdaddr = hdev->bdaddr;
- di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
- di.flags = flags;
- di.pkt_type = hdev->pkt_type;
- if (lmp_bredr_capable(hdev)) {
- di.acl_mtu = hdev->acl_mtu;
- di.acl_pkts = hdev->acl_pkts;
- di.sco_mtu = hdev->sco_mtu;
- di.sco_pkts = hdev->sco_pkts;
- } else {
- di.acl_mtu = hdev->le_mtu;
- di.acl_pkts = hdev->le_pkts;
- di.sco_mtu = 0;
- di.sco_pkts = 0;
- }
- 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 (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
- return -EBUSY;
- if (blocked) {
- hci_dev_set_flag(hdev, HCI_RFKILLED);
- if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG))
- hci_dev_do_close(hdev);
- } else {
- hci_dev_clear_flag(hdev, HCI_RFKILLED);
- }
- return 0;
- }
- static const struct rfkill_ops hci_rfkill_ops = {
- .set_block = hci_rfkill_set_block,
- };
- static void hci_power_on(struct work_struct *work)
- {
- struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
- int err;
- BT_DBG("%s", hdev->name);
- err = hci_dev_do_open(hdev);
- if (err < 0) {
- hci_dev_lock(hdev);
- mgmt_set_powered_failed(hdev, err);
- hci_dev_unlock(hdev);
- return;
- }
- /* During the HCI setup phase, a few error conditions are
- * ignored and they need to be checked now. If they are still
- * valid, it is important to turn the device back off.
- */
- if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
- hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
- (hdev->dev_type == HCI_BREDR &&
- !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
- !bacmp(&hdev->static_addr, BDADDR_ANY))) {
- hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
- hci_dev_do_close(hdev);
- } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
- queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
- HCI_AUTO_OFF_TIMEOUT);
- }
- if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
- /* For unconfigured devices, set the HCI_RAW flag
- * so that userspace can easily identify them.
- */
- if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
- set_bit(HCI_RAW, &hdev->flags);
- /* For fully configured devices, this will send
- * the Index Added event. For unconfigured devices,
- * it will send Unconfigued Index Added event.
- *
- * Devices with HCI_QUIRK_RAW_DEVICE are ignored
- * and no event will be send.
- */
- mgmt_index_added(hdev);
- } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
- /* When the controller is now configured, then it
- * is important to clear the HCI_RAW flag.
- */
- if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
- clear_bit(HCI_RAW, &hdev->flags);
- /* Powering on the controller with HCI_CONFIG set only
- * happens with the transition from unconfigured to
- * configured. This will send the Index Added event.
- */
- 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);
- hci_dev_do_close(hdev);
- }
- static void hci_error_reset(struct work_struct *work)
- {
- struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
- BT_DBG("%s", hdev->name);
- if (hdev->hw_error)
- hdev->hw_error(hdev, hdev->hw_error_code);
- else
- BT_ERR("%s hardware error 0x%2.2x", hdev->name,
- hdev->hw_error_code);
- if (hci_dev_do_close(hdev))
- return;
- hci_dev_do_open(hdev);
- }
- static void hci_discov_off(struct work_struct *work)
- {
- struct hci_dev *hdev;
- hdev = container_of(work, struct hci_dev, discov_off.work);
- BT_DBG("%s", hdev->name);
- mgmt_discoverable_timeout(hdev);
- }
- static void hci_adv_timeout_expire(struct work_struct *work)
- {
- struct hci_dev *hdev;
- hdev = container_of(work, struct hci_dev, adv_instance_expire.work);
- BT_DBG("%s", hdev->name);
- mgmt_adv_timeout_expired(hdev);
- }
- void hci_uuids_clear(struct hci_dev *hdev)
- {
- struct bt_uuid *uuid, *tmp;
- list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
- list_del(&uuid->list);
- kfree(uuid);
- }
- }
- void hci_link_keys_clear(struct hci_dev *hdev)
- {
- struct link_key *key;
- list_for_each_entry_rcu(key, &hdev->link_keys, list) {
- list_del_rcu(&key->list);
- kfree_rcu(key, rcu);
- }
- }
- void hci_smp_ltks_clear(struct hci_dev *hdev)
- {
- struct smp_ltk *k;
- list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
- list_del_rcu(&k->list);
- kfree_rcu(k, rcu);
- }
- }
- void hci_smp_irks_clear(struct hci_dev *hdev)
- {
- struct smp_irk *k;
- list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
- list_del_rcu(&k->list);
- kfree_rcu(k, rcu);
- }
- }
- struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
- {
- struct link_key *k;
- rcu_read_lock();
- list_for_each_entry_rcu(k, &hdev->link_keys, list) {
- if (bacmp(bdaddr, &k->bdaddr) == 0) {
- rcu_read_unlock();
- return k;
- }
- }
- rcu_read_unlock();
- return NULL;
- }
- static bool 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 true;
- /* Debug keys are insecure so don't store them persistently */
- if (key_type == HCI_LK_DEBUG_COMBINATION)
- return false;
- /* Changed combination key and there's no previous one */
- if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
- return false;
- /* Security mode 3 case */
- if (!conn)
- return true;
- /* BR/EDR key derived using SC from an LE link */
- if (conn->type == LE_LINK)
- return true;
- /* Neither local nor remote side had no-bonding as requirement */
- if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
- return true;
- /* Local side had dedicated bonding as requirement */
- if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
- return true;
- /* Remote side had dedicated bonding as requirement */
- if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
- return true;
- /* If none of the above criteria match, then don't store the key
- * persistently */
- return false;
- }
- static u8 ltk_role(u8 type)
- {
- if (type == SMP_LTK)
- return HCI_ROLE_MASTER;
- return HCI_ROLE_SLAVE;
- }
- struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 addr_type, u8 role)
- {
- struct smp_ltk *k;
- rcu_read_lock();
- list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
- if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
- continue;
- if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
- rcu_read_unlock();
- return k;
- }
- }
- rcu_read_unlock();
- return NULL;
- }
- struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
- {
- struct smp_irk *irk;
- rcu_read_lock();
- list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
- if (!bacmp(&irk->rpa, rpa)) {
- rcu_read_unlock();
- return irk;
- }
- }
- list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
- if (smp_irk_matches(hdev, irk->val, rpa)) {
- bacpy(&irk->rpa, rpa);
- rcu_read_unlock();
- return irk;
- }
- }
- rcu_read_unlock();
- return NULL;
- }
- struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 addr_type)
- {
- struct smp_irk *irk;
- /* Identity Address must be public or static random */
- if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
- return NULL;
- rcu_read_lock();
- list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
- if (addr_type == irk->addr_type &&
- bacmp(bdaddr, &irk->bdaddr) == 0) {
- rcu_read_unlock();
- return irk;
- }
- }
- rcu_read_unlock();
- return NULL;
- }
- struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
- bdaddr_t *bdaddr, u8 *val, u8 type,
- u8 pin_len, bool *persistent)
- {
- struct link_key *key, *old_key;
- u8 old_key_type;
- 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_KERNEL);
- if (!key)
- return NULL;
- list_add_rcu(&key->list, &hdev->link_keys);
- }
- BT_DBG("%s key for %pMR type %u", hdev->name, 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, HCI_LINK_KEY_SIZE);
- key->pin_len = pin_len;
- if (type == HCI_LK_CHANGED_COMBINATION)
- key->type = old_key_type;
- else
- key->type = type;
- if (persistent)
- *persistent = hci_persistent_key(hdev, conn, type,
- old_key_type);
- return key;
- }
- struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 addr_type, u8 type, u8 authenticated,
- u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
- {
- struct smp_ltk *key, *old_key;
- u8 role = ltk_role(type);
- old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
- if (old_key)
- key = old_key;
- else {
- key = kzalloc(sizeof(*key), GFP_KERNEL);
- if (!key)
- return NULL;
- list_add_rcu(&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->rand = rand;
- key->enc_size = enc_size;
- key->type = type;
- return key;
- }
- struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 addr_type, u8 val[16], bdaddr_t *rpa)
- {
- struct smp_irk *irk;
- irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
- if (!irk) {
- irk = kzalloc(sizeof(*irk), GFP_KERNEL);
- if (!irk)
- return NULL;
- bacpy(&irk->bdaddr, bdaddr);
- irk->addr_type = addr_type;
- list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
- }
- memcpy(irk->val, val, 16);
- bacpy(&irk->rpa, rpa);
- return irk;
- }
- 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 %pMR", hdev->name, bdaddr);
- list_del_rcu(&key->list);
- kfree_rcu(key, rcu);
- return 0;
- }
- int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
- {
- struct smp_ltk *k;
- int removed = 0;
- list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
- if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
- continue;
- BT_DBG("%s removing %pMR", hdev->name, bdaddr);
- list_del_rcu(&k->list);
- kfree_rcu(k, rcu);
- removed++;
- }
- return removed ? 0 : -ENOENT;
- }
- void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
- {
- struct smp_irk *k;
- list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) {
- if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
- continue;
- BT_DBG("%s removing %pMR", hdev->name, bdaddr);
- list_del_rcu(&k->list);
- kfree_rcu(k, rcu);
- }
- }
- bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
- {
- struct smp_ltk *k;
- struct smp_irk *irk;
- u8 addr_type;
- if (type == BDADDR_BREDR) {
- if (hci_find_link_key(hdev, bdaddr))
- return true;
- return false;
- }
- /* Convert to HCI addr type which struct smp_ltk uses */
- if (type == BDADDR_LE_PUBLIC)
- addr_type = ADDR_LE_DEV_PUBLIC;
- else
- addr_type = ADDR_LE_DEV_RANDOM;
- irk = hci_get_irk(hdev, bdaddr, addr_type);
- if (irk) {
- bdaddr = &irk->bdaddr;
- addr_type = irk->addr_type;
- }
- rcu_read_lock();
- list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
- if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
- rcu_read_unlock();
- return true;
- }
- }
- rcu_read_unlock();
- return false;
- }
- /* HCI command timer function */
- static void hci_cmd_timeout(struct work_struct *work)
- {
- struct hci_dev *hdev = container_of(work, struct hci_dev,
- cmd_timer.work);
- if (hdev->sent_cmd) {
- struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
- u16 opcode = __le16_to_cpu(sent->opcode);
- BT_ERR("%s command 0x%4.4x tx timeout", hdev->name, opcode);
- } else {
- 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, u8 bdaddr_type)
- {
- struct oob_data *data;
- list_for_each_entry(data, &hdev->remote_oob_data, list) {
- if (bacmp(bdaddr, &data->bdaddr) != 0)
- continue;
- if (data->bdaddr_type != bdaddr_type)
- continue;
- return data;
- }
- return NULL;
- }
- int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 bdaddr_type)
- {
- struct oob_data *data;
- data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
- if (!data)
- return -ENOENT;
- BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
- list_del(&data->list);
- kfree(data);
- return 0;
- }
- void 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);
- }
- }
- int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 bdaddr_type, u8 *hash192, u8 *rand192,
- u8 *hash256, u8 *rand256)
- {
- struct oob_data *data;
- data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
- if (!data) {
- data = kmalloc(sizeof(*data), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
- bacpy(&data->bdaddr, bdaddr);
- data->bdaddr_type = bdaddr_type;
- list_add(&data->list, &hdev->remote_oob_data);
- }
- if (hash192 && rand192) {
- memcpy(data->hash192, hash192, sizeof(data->hash192));
- memcpy(data->rand192, rand192, sizeof(data->rand192));
- if (hash256 && rand256)
- data->present = 0x03;
- } else {
- memset(data->hash192, 0, sizeof(data->hash192));
- memset(data->rand192, 0, sizeof(data->rand192));
- if (hash256 && rand256)
- data->present = 0x02;
- else
- data->present = 0x00;
- }
- if (hash256 && rand256) {
- memcpy(data->hash256, hash256, sizeof(data->hash256));
- memcpy(data->rand256, rand256, sizeof(data->rand256));
- } else {
- memset(data->hash256, 0, sizeof(data->hash256));
- memset(data->rand256, 0, sizeof(data->rand256));
- if (hash192 && rand192)
- data->present = 0x01;
- }
- BT_DBG("%s for %pMR", hdev->name, bdaddr);
- return 0;
- }
- /* This function requires the caller holds hdev->lock */
- struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
- {
- struct adv_info *adv_instance;
- list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
- if (adv_instance->instance == instance)
- return adv_instance;
- }
- return NULL;
- }
- /* This function requires the caller holds hdev->lock */
- struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) {
- struct adv_info *cur_instance;
- cur_instance = hci_find_adv_instance(hdev, instance);
- if (!cur_instance)
- return NULL;
- if (cur_instance == list_last_entry(&hdev->adv_instances,
- struct adv_info, list))
- return list_first_entry(&hdev->adv_instances,
- struct adv_info, list);
- else
- return list_next_entry(cur_instance, list);
- }
- /* This function requires the caller holds hdev->lock */
- int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
- {
- struct adv_info *adv_instance;
- adv_instance = hci_find_adv_instance(hdev, instance);
- if (!adv_instance)
- return -ENOENT;
- BT_DBG("%s removing %dMR", hdev->name, instance);
- if (hdev->cur_adv_instance == instance && hdev->adv_instance_timeout) {
- cancel_delayed_work(&hdev->adv_instance_expire);
- hdev->adv_instance_timeout = 0;
- }
- list_del(&adv_instance->list);
- kfree(adv_instance);
- hdev->adv_instance_cnt--;
- return 0;
- }
- /* This function requires the caller holds hdev->lock */
- void hci_adv_instances_clear(struct hci_dev *hdev)
- {
- struct adv_info *adv_instance, *n;
- if (hdev->adv_instance_timeout) {
- cancel_delayed_work(&hdev->adv_instance_expire);
- hdev->adv_instance_timeout = 0;
- }
- list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
- list_del(&adv_instance->list);
- kfree(adv_instance);
- }
- hdev->adv_instance_cnt = 0;
- }
- /* This function requires the caller holds hdev->lock */
- int hci_add_adv_instance(struct hci_dev *hdev, u8 instance, u32 flags,
- u16 adv_data_len, u8 *adv_data,
- u16 scan_rsp_len, u8 *scan_rsp_data,
- u16 timeout, u16 duration)
- {
- struct adv_info *adv_instance;
- adv_instance = hci_find_adv_instance(hdev, instance);
- if (adv_instance) {
- memset(adv_instance->adv_data, 0,
- sizeof(adv_instance->adv_data));
- memset(adv_instance->scan_rsp_data, 0,
- sizeof(adv_instance->scan_rsp_data));
- } else {
- if (hdev->adv_instance_cnt >= HCI_MAX_ADV_INSTANCES ||
- instance < 1 || instance > HCI_MAX_ADV_INSTANCES)
- return -EOVERFLOW;
- adv_instance = kzalloc(sizeof(*adv_instance), GFP_KERNEL);
- if (!adv_instance)
- return -ENOMEM;
- adv_instance->pending = true;
- adv_instance->instance = instance;
- list_add(&adv_instance->list, &hdev->adv_instances);
- hdev->adv_instance_cnt++;
- }
- adv_instance->flags = flags;
- adv_instance->adv_data_len = adv_data_len;
- adv_instance->scan_rsp_len = scan_rsp_len;
- if (adv_data_len)
- memcpy(adv_instance->adv_data, adv_data, adv_data_len);
- if (scan_rsp_len)
- memcpy(adv_instance->scan_rsp_data,
- scan_rsp_data, scan_rsp_len);
- adv_instance->timeout = timeout;
- adv_instance->remaining_time = timeout;
- if (duration == 0)
- adv_instance->duration = HCI_DEFAULT_ADV_DURATION;
- else
- adv_instance->duration = duration;
- BT_DBG("%s for %dMR", hdev->name, instance);
- return 0;
- }
- struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
- bdaddr_t *bdaddr, u8 type)
- {
- struct bdaddr_list *b;
- list_for_each_entry(b, bdaddr_list, list) {
- if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
- return b;
- }
- return NULL;
- }
- void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
- {
- struct list_head *p, *n;
- list_for_each_safe(p, n, bdaddr_list) {
- struct bdaddr_list *b = list_entry(p, struct bdaddr_list, list);
- list_del(p);
- kfree(b);
- }
- }
- int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
- {
- struct bdaddr_list *entry;
- if (!bacmp(bdaddr, BDADDR_ANY))
- return -EBADF;
- if (hci_bdaddr_list_lookup(list, bdaddr, type))
- return -EEXIST;
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry)
- return -ENOMEM;
- bacpy(&entry->bdaddr, bdaddr);
- entry->bdaddr_type = type;
- list_add(&entry->list, list);
- return 0;
- }
- int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
- {
- struct bdaddr_list *entry;
- if (!bacmp(bdaddr, BDADDR_ANY)) {
- hci_bdaddr_list_clear(list);
- return 0;
- }
- entry = hci_bdaddr_list_lookup(list, bdaddr, type);
- if (!entry)
- return -ENOENT;
- list_del(&entry->list);
- kfree(entry);
- return 0;
- }
- /* This function requires the caller holds hdev->lock */
- struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
- bdaddr_t *addr, u8 addr_type)
- {
- struct hci_conn_params *params;
- list_for_each_entry(params, &hdev->le_conn_params, list) {
- if (bacmp(¶ms->addr, addr) == 0 &&
- params->addr_type == addr_type) {
- return params;
- }
- }
- return NULL;
- }
- /* This function requires the caller holds hdev->lock */
- struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
- bdaddr_t *addr, u8 addr_type)
- {
- struct hci_conn_params *param;
- list_for_each_entry(param, list, action) {
- if (bacmp(¶m->addr, addr) == 0 &&
- param->addr_type == addr_type)
- return param;
- }
- return NULL;
- }
- /* This function requires the caller holds hdev->lock */
- struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
- bdaddr_t *addr, u8 addr_type)
- {
- struct hci_conn_params *params;
- params = hci_conn_params_lookup(hdev, addr, addr_type);
- if (params)
- return params;
- params = kzalloc(sizeof(*params), GFP_KERNEL);
- if (!params) {
- BT_ERR("Out of memory");
- return NULL;
- }
- bacpy(¶ms->addr, addr);
- params->addr_type = addr_type;
- list_add(¶ms->list, &hdev->le_conn_params);
- INIT_LIST_HEAD(¶ms->action);
- params->conn_min_interval = hdev->le_conn_min_interval;
- params->conn_max_interval = hdev->le_conn_max_interval;
- params->conn_latency = hdev->le_conn_latency;
- params->supervision_timeout = hdev->le_supv_timeout;
- params->auto_connect = HCI_AUTO_CONN_DISABLED;
- BT_DBG("addr %pMR (type %u)", addr, addr_type);
- return params;
- }
- static void hci_conn_params_free(struct hci_conn_params *params)
- {
- if (params->conn) {
- hci_conn_drop(params->conn);
- hci_conn_put(params->conn);
- }
- list_del(¶ms->action);
- list_del(¶ms->list);
- kfree(params);
- }
- /* This function requires the caller holds hdev->lock */
- void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
- {
- struct hci_conn_params *params;
- params = hci_conn_params_lookup(hdev, addr, addr_type);
- if (!params)
- return;
- hci_conn_params_free(params);
- hci_update_background_scan(hdev);
- BT_DBG("addr %pMR (type %u)", addr, addr_type);
- }
- /* This function requires the caller holds hdev->lock */
- void hci_conn_params_clear_disabled(struct hci_dev *hdev)
- {
- struct hci_conn_params *params, *tmp;
- list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
- if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
- continue;
- /* If trying to estabilish one time connection to disabled
- * device, leave the params, but mark them as just once.
- */
- if (params->explicit_connect) {
- params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
- continue;
- }
- list_del(¶ms->list);
- kfree(params);
- }
- BT_DBG("All LE disabled connection parameters were removed");
- }
- /* This function requires the caller holds hdev->lock */
- void hci_conn_params_clear_all(struct hci_dev *hdev)
- {
- struct hci_conn_params *params, *tmp;
- list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
- hci_conn_params_free(params);
- hci_update_background_scan(hdev);
- BT_DBG("All LE connection parameters were removed");
- }
- static void inquiry_complete(struct hci_dev *hdev, u8 status, u16 opcode)
- {
- if (status) {
- BT_ERR("Failed to start inquiry: status %d", status);
- hci_dev_lock(hdev);
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
- hci_dev_unlock(hdev);
- return;
- }
- }
- static void le_scan_disable_work_complete(struct hci_dev *hdev, u8 status,
- u16 opcode)
- {
- /* General inquiry access code (GIAC) */
- u8 lap[3] = { 0x33, 0x8b, 0x9e };
- struct hci_cp_inquiry cp;
- int err;
- if (status) {
- BT_ERR("Failed to disable LE scanning: status %d", status);
- return;
- }
- hdev->discovery.scan_start = 0;
- switch (hdev->discovery.type) {
- case DISCOV_TYPE_LE:
- hci_dev_lock(hdev);
- hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
- hci_dev_unlock(hdev);
- break;
- case DISCOV_TYPE_INTERLEAVED:
- hci_dev_lock(hdev);
- if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
- &hdev->quirks)) {
- /* If we were running LE only scan, change discovery
- * state. If we were running both LE and BR/EDR inquiry
- * simultaneously, and BR/EDR inquiry is already
- * finished, stop discovery, otherwise BR/EDR inquiry
- * will stop discovery when finished. If we will resolve
- * remote device name, do not change discovery state.
- */
- if (!test_bit(HCI_INQUIRY, &hdev->flags) &&
- hdev->discovery.state != DISCOVERY_RESOLVING)
- hci_discovery_set_state(hdev,
- DISCOVERY_STOPPED);
- } else {
- struct hci_request req;
- hci_inquiry_cache_flush(hdev);
- hci_req_init(&req, hdev);
- memset(&cp, 0, sizeof(cp));
- memcpy(&cp.lap, lap, sizeof(cp.lap));
- cp.length = DISCOV_INTERLEAVED_INQUIRY_LEN;
- hci_req_add(&req, HCI_OP_INQUIRY, sizeof(cp), &cp);
- err = hci_req_run(&req, inquiry_complete);
- if (err) {
- BT_ERR("Inquiry request failed: err %d", err);
- hci_discovery_set_state(hdev,
- DISCOVERY_STOPPED);
- }
- }
- hci_dev_unlock(hdev);
- break;
- }
- }
- static void le_scan_disable_work(struct work_struct *work)
- {
- struct hci_dev *hdev = container_of(work, struct hci_dev,
- le_scan_disable.work);
- struct hci_request req;
- int err;
- BT_DBG("%s", hdev->name);
- cancel_delayed_work_sync(&hdev->le_scan_restart);
- hci_req_init(&req, hdev);
- hci_req_add_le_scan_disable(&req);
- err = hci_req_run(&req, le_scan_disable_work_complete);
- if (err)
- BT_ERR("Disable LE scanning request failed: err %d", err);
- }
- static void le_scan_restart_work_complete(struct hci_dev *hdev, u8 status,
- u16 opcode)
- {
- unsigned long timeout, duration, scan_start, now;
- BT_DBG("%s", hdev->name);
- if (status) {
- BT_ERR("Failed to restart LE scan: status %d", status);
- return;
- }
- if (!test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) ||
- !hdev->discovery.scan_start)
- return;
- /* When the scan was started, hdev->le_scan_disable has been queued
- * after duration from scan_start. During scan restart this job
- * has been canceled, and we need to queue it again after proper
- * timeout, to make sure that scan does not run indefinitely.
- */
- duration = hdev->discovery.scan_duration;
- scan_start = hdev->discovery.scan_start;
- now = jiffies;
- if (now - scan_start <= duration) {
- int elapsed;
- if (now >= scan_start)
- elapsed = now - scan_start;
- else
- elapsed = ULONG_MAX - scan_start + now;
- timeout = duration - elapsed;
- } else {
- timeout = 0;
- }
- queue_delayed_work(hdev->workqueue,
- &hdev->le_scan_disable, timeout);
- }
- static void le_scan_restart_work(struct work_struct *work)
- {
- struct hci_dev *hdev = container_of(work, struct hci_dev,
- le_scan_restart.work);
- struct hci_request req;
- struct hci_cp_le_set_scan_enable cp;
- int err;
- BT_DBG("%s", hdev->name);
- /* If controller is not scanning we are done. */
- if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
- return;
- hci_req_init(&req, hdev);
- hci_req_add_le_scan_disable(&req);
- memset(&cp, 0, sizeof(cp));
- cp.enable = LE_SCAN_ENABLE;
- cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
- hci_req_add(&req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
- err = hci_req_run(&req, le_scan_restart_work_complete);
- if (err)
- BT_ERR("Restart LE scan request failed: err %d", err);
- }
- /* Copy the Identity Address of the controller.
- *
- * If the controller has a public BD_ADDR, then by default use that one.
- * If this is a LE only controller without a public address, default to
- * the static random address.
- *
- * For debugging purposes it is possible to force controllers with a
- * public address to use the static random address instead.
- *
- * In case BR/EDR has been disabled on a dual-mode controller and
- * userspace has configured a static address, then that address
- * becomes the identity address instead of the public BR/EDR address.
- */
- void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
- u8 *bdaddr_type)
- {
- if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
- !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
- (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
- bacmp(&hdev->static_addr, BDADDR_ANY))) {
- bacpy(bdaddr, &hdev->static_addr);
- *bdaddr_type = ADDR_LE_DEV_RANDOM;
- } else {
- bacpy(bdaddr, &hdev->bdaddr);
- *bdaddr_type = ADDR_LE_DEV_PUBLIC;
- }
- }
- /* Alloc HCI device */
- struct hci_dev *hci_alloc_dev(void)
- {
- struct hci_dev *hdev;
- hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
- if (!hdev)
- return NULL;
- hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
- hdev->esco_type = (ESCO_HV1);
- hdev->link_mode = (HCI_LM_ACCEPT);
- hdev->num_iac = 0x01; /* One IAC support is mandatory */
- hdev->io_capability = 0x03; /* No Input No Output */
- hdev->manufacturer = 0xffff; /* Default to internal use */
- hdev->inq_tx_power = HCI_TX_POWER_INVALID;
- hdev->adv_tx_power = HCI_TX_POWER_INVALID;
- hdev->adv_instance_cnt = 0;
- hdev->cur_adv_instance = 0x00;
- hdev->adv_instance_timeout = 0;
- hdev->sniff_max_interval = 800;
- hdev->sniff_min_interval = 80;
- hdev->le_adv_channel_map = 0x07;
- hdev->le_adv_min_interval = 0x0800;
- hdev->le_adv_max_interval = 0x0800;
- hdev->le_scan_interval = 0x0060;
- hdev->le_scan_window = 0x0030;
- hdev->le_conn_min_interval = 0x0028;
- hdev->le_conn_max_interval = 0x0038;
- hdev->le_conn_latency = 0x0000;
- hdev->le_supv_timeout = 0x002a;
- hdev->le_def_tx_len = 0x001b;
- hdev->le_def_tx_time = 0x0148;
- hdev->le_max_tx_len = 0x001b;
- hdev->le_max_tx_time = 0x0148;
- hdev->le_max_rx_len = 0x001b;
- hdev->le_max_rx_time = 0x0148;
- hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
- hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
- hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
- hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
- mutex_init(&hdev->lock);
- mutex_init(&hdev->req_lock);
- INIT_LIST_HEAD(&hdev->mgmt_pending);
- INIT_LIST_HEAD(&hdev->blacklist);
- INIT_LIST_HEAD(&hdev->whitelist);
- INIT_LIST_HEAD(&hdev->uuids);
- INIT_LIST_HEAD(&hdev->link_keys);
- INIT_LIST_HEAD(&hdev->long_term_keys);
- INIT_LIST_HEAD(&hdev->identity_resolving_keys);
- INIT_LIST_HEAD(&hdev->remote_oob_data);
- INIT_LIST_HEAD(&hdev->le_white_list);
- INIT_LIST_HEAD(&hdev->le_conn_params);
- INIT_LIST_HEAD(&hdev->pend_le_conns);
- INIT_LIST_HEAD(&hdev->pend_le_reports);
- INIT_LIST_HEAD(&hdev->conn_hash.list);
- INIT_LIST_HEAD(&hdev->adv_instances);
- INIT_WORK(&hdev->rx_work, hci_rx_work);
- INIT_WORK(&hdev->cmd_work, hci_cmd_work);
- INIT_WORK(&hdev->tx_work, hci_tx_work);
- INIT_WORK(&hdev->power_on, hci_power_on);
- INIT_WORK(&hdev->error_reset, hci_error_reset);
- INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
- INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
- INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
- INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
- INIT_DELAYED_WORK(&hdev->adv_instance_expire, hci_adv_timeout_expire);
- skb_queue_head_init(&hdev->rx_q);
- skb_queue_head_init(&hdev->cmd_q);
- skb_queue_head_init(&hdev->raw_q);
- init_waitqueue_head(&hdev->req_wait_q);
- INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
- hci_init_sysfs(hdev);
- discovery_init(hdev);
- return hdev;
- }
- EXPORT_SYMBOL(hci_alloc_dev);
- /* Free HCI device */
- void hci_free_dev(struct hci_dev *hdev)
- {
- /* will free via device release */
- put_device(&hdev->dev);
- }
- EXPORT_SYMBOL(hci_free_dev);
- /* Register HCI device */
- int hci_register_dev(struct hci_dev *hdev)
- {
- int id, error;
- if (!hdev->open || !hdev->close || !hdev->send)
- return -EINVAL;
- /* Do not allow HCI_AMP devices to register at index 0,
- * so the index can be used as the AMP controller ID.
- */
- switch (hdev->dev_type) {
- case HCI_BREDR:
- id = ida_simple_get(&hci_index_ida, 0, 0, GFP_KERNEL);
- break;
- case HCI_AMP:
- id = ida_simple_get(&hci_index_ida, 1, 0, GFP_KERNEL);
- break;
- default:
- return -EINVAL;
- }
- if (id < 0)
- return id;
- sprintf(hdev->name, "hci%d", id);
- hdev->id = id;
- BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
- hdev->workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1, hdev->name);
- if (!hdev->workqueue) {
- error = -ENOMEM;
- goto err;
- }
- hdev->req_workqueue = alloc_workqueue("%s", WQ_HIGHPRI | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1, hdev->name);
- if (!hdev->req_workqueue) {
- destroy_workqueue(hdev->workqueue);
- error = -ENOMEM;
- goto err;
- }
- if (!IS_ERR_OR_NULL(bt_debugfs))
- hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
- dev_set_name(&hdev->dev, "%s", hdev->name);
- error = device_add(&hdev->dev);
- 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;
- }
- }
- if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
- hci_dev_set_flag(hdev, HCI_RFKILLED);
- hci_dev_set_flag(hdev, HCI_SETUP);
- hci_dev_set_flag(hdev, HCI_AUTO_OFF);
- if (hdev->dev_type == HCI_BREDR) {
- /* Assume BR/EDR support until proven otherwise (such as
- * through reading supported features during init.
- */
- hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
- }
- write_lock(&hci_dev_list_lock);
- list_add(&hdev->list, &hci_dev_list);
- write_unlock(&hci_dev_list_lock);
- /* Devices that are marked for raw-only usage are unconfigured
- * and should not be included in normal operation.
- */
- if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
- hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
- hci_sock_dev_event(hdev, HCI_DEV_REG);
- hci_dev_hold(hdev);
- queue_work(hdev->req_workqueue, &hdev->power_on);
- return id;
- err_wqueue:
- destroy_workqueue(hdev->workqueue);
- destroy_workqueue(hdev->req_workqueue);
- err:
- ida_simple_remove(&hci_index_ida, hdev->id);
- return error;
- }
- EXPORT_SYMBOL(hci_register_dev);
- /* Unregister HCI device */
- void hci_unregister_dev(struct hci_dev *hdev)
- {
- int id;
- BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
- hci_dev_set_flag(hdev, HCI_UNREGISTER);
- id = hdev->id;
- write_lock(&hci_dev_list_lock);
- list_del(&hdev->list);
- write_unlock(&hci_dev_list_lock);
- hci_dev_do_close(hdev);
- cancel_work_sync(&hdev->power_on);
- if (!test_bit(HCI_INIT, &hdev->flags) &&
- !hci_dev_test_flag(hdev, HCI_SETUP) &&
- !hci_dev_test_flag(hdev, HCI_CONFIG)) {
- 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_sock_dev_event(hdev, HCI_DEV_UNREG);
- if (hdev->rfkill) {
- rfkill_unregister(hdev->rfkill);
- rfkill_destroy(hdev->rfkill);
- }
- device_del(&hdev->dev);
- debugfs_remove_recursive(hdev->debugfs);
- destroy_workqueue(hdev->workqueue);
- destroy_workqueue(hdev->req_workqueue);
- hci_dev_lock(hdev);
- hci_bdaddr_list_clear(&hdev->blacklist);
- hci_bdaddr_list_clear(&hdev->whitelist);
- hci_uuids_clear(hdev);
- hci_link_keys_clear(hdev);
- hci_smp_ltks_clear(hdev);
- hci_smp_irks_clear(hdev);
- hci_remote_oob_data_clear(hdev);
- hci_adv_instances_clear(hdev);
- hci_bdaddr_list_clear(&hdev->le_white_list);
- hci_conn_params_clear_all(hdev);
- hci_discovery_filter_clear(hdev);
- hci_dev_unlock(hdev);
- hci_dev_put(hdev);
- ida_simple_remove(&hci_index_ida, id);
- }
- EXPORT_SYMBOL(hci_unregister_dev);
- /* Suspend HCI device */
- int hci_suspend_dev(struct hci_dev *hdev)
- {
- hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
- return 0;
- }
- EXPORT_SYMBOL(hci_suspend_dev);
- /* Resume HCI device */
- int hci_resume_dev(struct hci_dev *hdev)
- {
- hci_sock_dev_event(hdev, HCI_DEV_RESUME);
- return 0;
- }
- EXPORT_SYMBOL(hci_resume_dev);
- /* Reset HCI device */
- int hci_reset_dev(struct hci_dev *hdev)
- {
- const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
- struct sk_buff *skb;
- skb = bt_skb_alloc(3, GFP_ATOMIC);
- if (!skb)
- return -ENOMEM;
- bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
- memcpy(skb_put(skb, 3), hw_err, 3);
- /* Send Hardware Error to upper stack */
- return hci_recv_frame(hdev, skb);
- }
- EXPORT_SYMBOL(hci_reset_dev);
- /* Receive frame from HCI drivers */
- int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
- {
- if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
- && !test_bit(HCI_INIT, &hdev->flags))) {
- kfree_skb(skb);
- return -ENXIO;
- }
- if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT &&
- bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
- bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) {
- kfree_skb(skb);
- return -EINVAL;
- }
- /* Incoming 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);
- /* Receive diagnostic message from HCI drivers */
- int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
- {
- /* Mark as diagnostic packet */
- bt_cb(skb)->pkt_type = HCI_DIAG_PKT;
- /* 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_diag);
- /* ---- Interface to upper protocols ---- */
- int hci_register_cb(struct hci_cb *cb)
- {
- BT_DBG("%p name %s", cb, cb->name);
- mutex_lock(&hci_cb_list_lock);
- list_add_tail(&cb->list, &hci_cb_list);
- mutex_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);
- mutex_lock(&hci_cb_list_lock);
- list_del(&cb->list);
- mutex_unlock(&hci_cb_list_lock);
- return 0;
- }
- EXPORT_SYMBOL(hci_unregister_cb);
- static void hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
- {
- int err;
- BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
- /* Time stamp */
- __net_timestamp(skb);
- /* Send copy to monitor */
- hci_send_to_monitor(hdev, skb);
- if (atomic_read(&hdev->promisc)) {
- /* Send copy to the sockets */
- hci_send_to_sock(hdev, skb);
- }
- /* Get rid of skb owner, prior to sending to the driver. */
- skb_orphan(skb);
- if (!test_bit(HCI_RUNNING, &hdev->flags)) {
- kfree_skb(skb);
- return;
- }
- err = hdev->send(hdev, skb);
- if (err < 0) {
- BT_ERR("%s sending frame failed (%d)", hdev->name, err);
- kfree_skb(skb);
- }
- }
- /* Send HCI command */
- int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
- const void *param)
- {
- struct sk_buff *skb;
- BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
- skb = hci_prepare_cmd(hdev, opcode, plen, param);
- if (!skb) {
- BT_ERR("%s no memory for command", hdev->name);
- return -ENOMEM;
- }
- /* Stand-alone HCI commands must be flagged as
- * single-command requests.
- */
- bt_cb(skb)->hci.req_start = true;
- 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%4.4x", hdev->name, opcode);
- return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
- }
- /* Send HCI command and wait for command commplete event */
- struct sk_buff *hci_cmd_sync(struct hci_dev *hdev, u16 opcode, u32 plen,
- const void *param, u32 timeout)
- {
- struct sk_buff *skb;
- if (!test_bit(HCI_UP, &hdev->flags))
- return ERR_PTR(-ENETDOWN);
- bt_dev_dbg(hdev, "opcode 0x%4.4x plen %d", opcode, plen);
- hci_req_lock(hdev);
- skb = __hci_cmd_sync(hdev, opcode, plen, param, timeout);
- hci_req_unlock(hdev);
- return skb;
- }
- EXPORT_SYMBOL(hci_cmd_sync);
- /* 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_chan *chan, struct sk_buff_head *queue,
- struct sk_buff *skb, __u16 flags)
- {
- struct hci_conn *conn = chan->conn;
- struct hci_dev *hdev = conn->hdev;
- struct sk_buff *list;
- skb->len = skb_headlen(skb);
- skb->data_len = 0;
- bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
- switch (hdev->dev_type) {
- case HCI_BREDR:
- hci_add_acl_hdr(skb, conn->handle, flags);
- break;
- case HCI_AMP:
- hci_add_acl_hdr(skb, chan->handle, flags);
- break;
- default:
- BT_ERR("%s unknown dev_type %d", hdev->name, hdev->dev_type);
- return;
- }
- 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. We need to use spin_lock_bh
- * here because of 6LoWPAN links, as there this function is
- * called from softirq and using normal spin lock could cause
- * deadlocks.
- */
- spin_lock_bh(&queue->lock);
- __skb_queue_tail(queue, skb);
- flags &= ~ACL_START;
- flags |= ACL_CONT;
- do {
- skb = list; list = list->next;
- 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_bh(&queue->lock);
- }
- }
- void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
- {
- struct hci_dev *hdev = chan->conn->hdev;
- BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
- hci_queue_acl(chan, &chan->data_q, skb, flags);
- queue_work(hdev->workqueue, &hdev->tx_work);
- }
- /* 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);
- bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
- skb_queue_tail(&conn->data_q, skb);
- queue_work(hdev->workqueue, &hdev->tx_work);
- }
- /* ---- HCI TX task (outgoing data) ---- */
- /* HCI Connection scheduler */
- static 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;
- unsigned 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 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 %pMR",
- hdev->name, &c->dst);
- hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
- }
- }
- rcu_read_unlock();
- }
- static 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;
- unsigned 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 AMP_LINK:
- cnt = hdev->block_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 void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
- {
- if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- /* ACL tx timeout must be longer than maximum
- * link supervision timeout (40.9 seconds) */
- if (!cnt && time_after(jiffies, hdev->acl_last_tx +
- HCI_ACL_TX_TIMEOUT))
- hci_link_tx_to(hdev, ACL_LINK);
- }
- }
- static 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(hdev, 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 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;
- u8 type;
- __check_timeout(hdev, cnt);
- BT_DBG("%s", hdev->name);
- if (hdev->dev_type == HCI_AMP)
- type = AMP_LINK;
- else
- type = ACL_LINK;
- while (hdev->block_cnt > 0 &&
- (chan = hci_chan_sent(hdev, type, "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(hdev, 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, type);
- }
- static void hci_sched_acl(struct hci_dev *hdev)
- {
- BT_DBG("%s", hdev->name);
- /* No ACL link over BR/EDR controller */
- if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_BREDR)
- return;
- /* No AMP link over AMP controller */
- if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
- 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 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(hdev, skb);
- conn->sent++;
- if (conn->sent == ~0)
- conn->sent = 0;
- }
- }
- }
- static 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(hdev, skb);
- conn->sent++;
- if (conn->sent == ~0)
- conn->sent = 0;
- }
- }
- }
- static 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 (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
- /* 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(hdev, 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);
- if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- /* 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(hdev, skb);
- }
- /* ----- HCI RX task (incoming data processing) ----- */
- /* ACL data packet */
- static 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%4.4x flags 0x%4.4x", 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 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%4.4x", 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 bool hci_req_is_complete(struct hci_dev *hdev)
- {
- struct sk_buff *skb;
- skb = skb_peek(&hdev->cmd_q);
- if (!skb)
- return true;
- return bt_cb(skb)->hci.req_start;
- }
- static void hci_resend_last(struct hci_dev *hdev)
- {
- struct hci_command_hdr *sent;
- struct sk_buff *skb;
- u16 opcode;
- if (!hdev->sent_cmd)
- return;
- sent = (void *) hdev->sent_cmd->data;
- opcode = __le16_to_cpu(sent->opcode);
- if (opcode == HCI_OP_RESET)
- return;
- skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
- if (!skb)
- return;
- skb_queue_head(&hdev->cmd_q, skb);
- queue_work(hdev->workqueue, &hdev->cmd_work);
- }
- void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
- hci_req_complete_t *req_complete,
- hci_req_complete_skb_t *req_complete_skb)
- {
- struct sk_buff *skb;
- unsigned long flags;
- BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
- /* If the completed command doesn't match the last one that was
- * sent we need to do special handling of it.
- */
- if (!hci_sent_cmd_data(hdev, opcode)) {
- /* Some CSR based controllers generate a spontaneous
- * reset complete event during init and any pending
- * command will never be completed. In such a case we
- * need to resend whatever was the last sent
- * command.
- */
- if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
- hci_resend_last(hdev);
- return;
- }
- /* If the command succeeded and there's still more commands in
- * this request the request is not yet complete.
- */
- if (!status && !hci_req_is_complete(hdev))
- return;
- /* If this was the last command in a request the complete
- * callback would be found in hdev->sent_cmd instead of the
- * command queue (hdev->cmd_q).
- */
- if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
- *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
- return;
- }
- if (bt_cb(hdev->sent_cmd)->hci.req_complete_skb) {
- *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
- return;
- }
- /* Remove all pending commands belonging to this request */
- spin_lock_irqsave(&hdev->cmd_q.lock, flags);
- while ((skb = __skb_dequeue(&hdev->cmd_q))) {
- if (bt_cb(skb)->hci.req_start) {
- __skb_queue_head(&hdev->cmd_q, skb);
- break;
- }
- *req_complete = bt_cb(skb)->hci.req_complete;
- *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
- kfree_skb(skb);
- }
- spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
- }
- 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))) {
- /* Send copy to monitor */
- hci_send_to_monitor(hdev, skb);
- if (atomic_read(&hdev->promisc)) {
- /* Send copy to the sockets */
- hci_send_to_sock(hdev, skb);
- }
- if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
- 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_cnt %d cmd queued %d", hdev->name,
- atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
- /* 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_KERNEL);
- if (hdev->sent_cmd) {
- atomic_dec(&hdev->cmd_cnt);
- hci_send_frame(hdev, skb);
- if (test_bit(HCI_RESET, &hdev->flags))
- cancel_delayed_work(&hdev->cmd_timer);
- else
- schedule_delayed_work(&hdev->cmd_timer,
- HCI_CMD_TIMEOUT);
- } else {
- skb_queue_head(&hdev->cmd_q, skb);
- queue_work(hdev->workqueue, &hdev->cmd_work);
- }
- }
- }
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