[PATCH v7 7/9] Bluetooth: move hci_get_random_address() to hci_sync

Brian Gix
2022-08-05T23:42:57Z

This function has no dependencies on the deprecated hci_request
mechanism, so has been moved unchanged to hci_sync.c

Signed-off-by: Brian Gix <brian.gix@intel.com>
---
include/net/bluetooth/hci_sync.h | 5 +
net/bluetooth/hci_request.c | 255 +++++++++++--------------------
net/bluetooth/hci_request.h | 9 --
net/bluetooth/hci_sync.c | 73 +++++++++
4 files changed, 170 insertions(+), 172 deletions(-)

diff --git a/include/net/bluetooth/hci_sync.h b/include/net/bluetooth/hci_sync.h
index aea950440b9d..b6b975c2ed3e 100644
--- a/include/net/bluetooth/hci_sync.h
+++ b/include/net/bluetooth/hci_sync.h
@@ -16,6 +16,7 @@ struct hci_cmd_sync_work_entry {
hci_cmd_sync_work_destroy_t destroy;
};

+struct adv_info;
/* Function with sync suffix shall not be called with hdev->lock held as they
* wait the command to complete and in the meantime an event could be received
* which could attempt to acquire hdev->lock causing a deadlock.
@@ -51,6 +52,10 @@ int hci_update_class_sync(struct hci_dev *hdev);
int hci_update_name_sync(struct hci_dev *hdev);
int hci_write_ssp_mode_sync(struct hci_dev *hdev, u8 mode);

+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+ bool use_rpa, struct adv_info *adv_instance,
+ u8 *own_addr_type, bdaddr_t *rand_addr);
+
int hci_update_random_address_sync(struct hci_dev *hdev, bool require_privacy,
bool rpa, u8 *own_addr_type);

diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 685dc0f983b7..b9875224ac7b 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -650,6 +650,96 @@ static inline bool hci_is_le_conn_scanning(struct hci_dev *hdev)
return false;
}

+static void set_random_addr(struct hci_request *req, bdaddr_t *rpa);
+static int hci_update_random_address(struct hci_request *req,
+ bool require_privacy, bool use_rpa,
+ u8 *own_addr_type)
+{
+ struct hci_dev *hdev = req->hdev;
+ int err;
+
+ /* If privacy is enabled use a resolvable private address. If
+ * current RPA has expired or there is something else than
+ * the current RPA in use, then generate a new one.
+ */
+ if (use_rpa) {
+ /* If Controller supports LL Privacy use own address type is
+ * 0x03
+ */
+ if (use_ll_privacy(hdev))
+ *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
+ else
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+
+ if (rpa_valid(hdev))
+ return 0;
+
+ err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
+ if (err < 0) {
+ bt_dev_err(hdev, "failed to generate new RPA");
+ return err;
+ }
+
+ set_random_addr(req, &hdev->rpa);
+
+ return 0;
+ }
+
+ /* In case of required privacy without resolvable private address,
+ * use an non-resolvable private address. This is useful for active
+ * scanning and non-connectable advertising.
+ */
+ if (require_privacy) {
+ bdaddr_t nrpa;
+
+ while (true) {
+ /* The non-resolvable private address is generated
+ * from random six bytes with the two most significant
+ * bits cleared.
+ */
+ get_random_bytes(&nrpa, 6);
+ nrpa.b[5] &= 0x3f;
+
+ /* The non-resolvable private address shall not be
+ * equal to the public address.
+ */
+ if (bacmp(&hdev->bdaddr, &nrpa))
+ break;
+ }
+
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+ set_random_addr(req, &nrpa);
+ return 0;
+ }
+
+ /* If forcing static address is in use or there is no public
+ * address use the static address as random address (but skip
+ * the HCI command if the current random address is already the
+ * static one.
+ *
+ * In case BR/EDR has been disabled on a dual-mode controller
+ * and a static address has been configured, then use that
+ * address instead of the public BR/EDR address.
+ */
+ 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))) {
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+ if (bacmp(&hdev->static_addr, &hdev->random_addr))
+ hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
+ &hdev->static_addr);
+ return 0;
+ }
+
+ /* Neither privacy nor static address is being used so use a
+ * public address.
+ */
+ *own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+ return 0;
+}
+
/* Ensure to call hci_req_add_le_scan_disable() first to disable the
* controller based address resolution to be able to reconfigure
* resolving list.
@@ -859,79 +949,6 @@ static void interleave_scan_work(struct work_struct *work)
&hdev->interleave_scan, timeout);
}

-int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
- bool use_rpa, struct adv_info *adv_instance,
- u8 *own_addr_type, bdaddr_t *rand_addr)
-{
- int err;
-
- bacpy(rand_addr, BDADDR_ANY);
-
- /* If privacy is enabled use a resolvable private address. If
- * current RPA has expired then generate a new one.
- */
- if (use_rpa) {
- /* If Controller supports LL Privacy use own address type is
- * 0x03
- */
- if (use_ll_privacy(hdev))
- *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
- else
- *own_addr_type = ADDR_LE_DEV_RANDOM;
-
- if (adv_instance) {
- if (adv_rpa_valid(adv_instance))
- return 0;
- } else {
- if (rpa_valid(hdev))
- return 0;
- }
-
- err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
- if (err < 0) {
- bt_dev_err(hdev, "failed to generate new RPA");
- return err;
- }
-
- bacpy(rand_addr, &hdev->rpa);
-
- return 0;
- }
-
- /* In case of required privacy without resolvable private address,
- * use an non-resolvable private address. This is useful for
- * non-connectable advertising.
- */
- if (require_privacy) {
- bdaddr_t nrpa;
-
- while (true) {
- /* The non-resolvable private address is generated
- * from random six bytes with the two most significant
- * bits cleared.
- */
- get_random_bytes(&nrpa, 6);
- nrpa.b[5] &= 0x3f;
-
- /* The non-resolvable private address shall not be
- * equal to the public address.
- */
- if (bacmp(&hdev->bdaddr, &nrpa))
- break;
- }
-
- *own_addr_type = ADDR_LE_DEV_RANDOM;
- bacpy(rand_addr, &nrpa);
-
- return 0;
- }
-
- /* No privacy so use a public address. */
- *own_addr_type = ADDR_LE_DEV_PUBLIC;
-
- return 0;
-}
-
static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
{
struct hci_dev *hdev = req->hdev;
@@ -956,96 +973,8 @@ static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
}

-int hci_update_random_address(struct hci_request *req, bool require_privacy,
- bool use_rpa, u8 *own_addr_type)
-{
- struct hci_dev *hdev = req->hdev;
- int err;
-
- /* If privacy is enabled use a resolvable private address. If
- * current RPA has expired or there is something else than
- * the current RPA in use, then generate a new one.
- */
- if (use_rpa) {
- /* If Controller supports LL Privacy use own address type is
- * 0x03
- */
- if (use_ll_privacy(hdev))
- *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
- else
- *own_addr_type = ADDR_LE_DEV_RANDOM;
-
- if (rpa_valid(hdev))
- return 0;
-
- err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
- if (err < 0) {
- bt_dev_err(hdev, "failed to generate new RPA");
- return err;
- }
-
- set_random_addr(req, &hdev->rpa);
-
- return 0;
- }
-
- /* In case of required privacy without resolvable private address,
- * use an non-resolvable private address. This is useful for active
- * scanning and non-connectable advertising.
- */
- if (require_privacy) {
- bdaddr_t nrpa;
-
- while (true) {
- /* The non-resolvable private address is generated
- * from random six bytes with the two most significant
- * bits cleared.
- */
- get_random_bytes(&nrpa, 6);
- nrpa.b[5] &= 0x3f;
-
- /* The non-resolvable private address shall not be
- * equal to the public address.
- */
- if (bacmp(&hdev->bdaddr, &nrpa))
- break;
- }
-
- *own_addr_type = ADDR_LE_DEV_RANDOM;
- set_random_addr(req, &nrpa);
- return 0;
- }
-
- /* If forcing static address is in use or there is no public
- * address use the static address as random address (but skip
- * the HCI command if the current random address is already the
- * static one.
- *
- * In case BR/EDR has been disabled on a dual-mode controller
- * and a static address has been configured, then use that
- * address instead of the public BR/EDR address.
- */
- 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))) {
- *own_addr_type = ADDR_LE_DEV_RANDOM;
- if (bacmp(&hdev->static_addr, &hdev->random_addr))
- hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
- &hdev->static_addr);
- return 0;
- }
-
- /* Neither privacy nor static address is being used so use a
- * public address.
- */
- *own_addr_type = ADDR_LE_DEV_PUBLIC;
-
- return 0;
-}
-
-void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
- u8 reason)
+static void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
+ u8 reason)
{
switch (conn->state) {
case BT_CONNECTED:
diff --git a/net/bluetooth/hci_request.h b/net/bluetooth/hci_request.h
index 55205cc9f281..c7185ad77c6e 100644
--- a/net/bluetooth/hci_request.h
+++ b/net/bluetooth/hci_request.h
@@ -74,16 +74,7 @@ void hci_req_add_le_passive_scan(struct hci_request *req);
void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next);

int hci_req_update_adv_data(struct hci_dev *hdev, u8 instance);
-int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
- bool use_rpa, struct adv_info *adv_instance,
- u8 *own_addr_type, bdaddr_t *rand_addr);
-
-int hci_update_random_address(struct hci_request *req, bool require_privacy,
- bool use_rpa, u8 *own_addr_type);

int hci_abort_conn(struct hci_conn *conn, u8 reason);
-void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
- u8 reason);
-
void hci_request_setup(struct hci_dev *hdev);
void hci_request_cancel_all(struct hci_dev *hdev);
diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
index bc993dd2383d..46eb535ff466 100644
--- a/net/bluetooth/hci_sync.c
+++ b/net/bluetooth/hci_sync.c
@@ -5992,3 +5992,76 @@ int hci_le_pa_terminate_sync(struct hci_dev *hdev, u16 handle)
return __hci_cmd_sync_status(hdev, HCI_OP_LE_PA_TERM_SYNC,
sizeof(cp), &cp, HCI_CMD_TIMEOUT);
}
+
+int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
+ bool use_rpa, struct adv_info *adv_instance,
+ u8 *own_addr_type, bdaddr_t *rand_addr)
+{
+ int err;
+
+ bacpy(rand_addr, BDADDR_ANY);
+
+ /* If privacy is enabled use a resolvable private address. If
+ * current RPA has expired then generate a new one.
+ */
+ if (use_rpa) {
+ /* If Controller supports LL Privacy use own address type is
+ * 0x03
+ */
+ if (use_ll_privacy(hdev))
+ *own_addr_type = ADDR_LE_DEV_RANDOM_RESOLVED;
+ else
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+
+ if (adv_instance) {
+ if (adv_rpa_valid(adv_instance))
+ return 0;
+ } else {
+ if (rpa_valid(hdev))
+ return 0;
+ }
+
+ err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
+ if (err < 0) {
+ bt_dev_err(hdev, "failed to generate new RPA");
+ return err;
+ }
+
+ bacpy(rand_addr, &hdev->rpa);
+
+ return 0;
+ }
+
+ /* In case of required privacy without resolvable private address,
+ * use an non-resolvable private address. This is useful for
+ * non-connectable advertising.
+ */
+ if (require_privacy) {
+ bdaddr_t nrpa;
+
+ while (true) {
+ /* The non-resolvable private address is generated
+ * from random six bytes with the two most significant
+ * bits cleared.
+ */
+ get_random_bytes(&nrpa, 6);
+ nrpa.b[5] &= 0x3f;
+
+ /* The non-resolvable private address shall not be
+ * equal to the public address.
+ */
+ if (bacmp(&hdev->bdaddr, &nrpa))
+ break;
+ }
+
+ *own_addr_type = ADDR_LE_DEV_RANDOM;
+ bacpy(rand_addr, &nrpa);
+
+ return 0;
+ }
+
+ /* No privacy so use a public address. */
+ *own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+ return 0;
+}
--
2.37.1