From: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Since it is required for some configurations to have multiple CIS with
the same peer (e.g. BAP - 4.4.6. Audio Configuration 6(i)).
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
---
include/net/bluetooth/hci_core.h | 14 ++-
net/bluetooth/hci_conn.c | 155 ++++++++++++++++++++++---------
net/bluetooth/hci_event.c | 94 +++++++++----------
net/bluetooth/iso.c | 8 +-
4 files changed, 173 insertions(+), 98 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 827e67159523..4fe1e71cb9d8 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -770,7 +770,10 @@ struct hci_conn {
void *iso_data;
struct amp_mgr *amp_mgr;
- struct hci_conn *link;
+ struct list_head link_list;
+ struct hci_conn *parent;
+ struct hci_link *link;
+
struct bt_codec codec;
void (*connect_cfm_cb) (struct hci_conn *conn, u8 status);
@@ -780,6 +783,11 @@ struct hci_conn {
void (*cleanup)(struct hci_conn *conn);
};
+struct hci_link {
+ struct list_head list;
+ struct hci_conn *conn;
+};
+
struct hci_chan {
struct list_head list;
__u16 handle;
@@ -1383,12 +1391,14 @@ static inline void hci_conn_put(struct hci_conn *conn)
put_device(&conn->dev);
}
-static inline void hci_conn_hold(struct hci_conn *conn)
+static inline struct hci_conn *hci_conn_hold(struct hci_conn *conn)
{
BT_DBG("hcon %p orig refcnt %d", conn, atomic_read(&conn->refcnt));
atomic_inc(&conn->refcnt);
cancel_delayed_work(&conn->disc_work);
+
+ return conn;
}
static inline void hci_conn_drop(struct hci_conn *conn)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 5672b4924572..8b8ebd3e2585 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -330,8 +330,11 @@ static void hci_add_sco(struct hci_conn *conn, __u16 handle)
static bool find_next_esco_param(struct hci_conn *conn,
const struct sco_param *esco_param, int size)
{
+ if (!conn->parent)
+ return false;
+
for (; conn->attempt <= size; conn->attempt++) {
- if (lmp_esco_2m_capable(conn->link) ||
+ if (lmp_esco_2m_capable(conn->parent) ||
(esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
break;
BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
@@ -461,7 +464,7 @@ static int hci_enhanced_setup_sync(struct hci_dev *hdev, void *data)
break;
case BT_CODEC_CVSD:
- if (lmp_esco_capable(conn->link)) {
+ if (conn->parent && lmp_esco_capable(conn->parent)) {
if (!find_next_esco_param(conn, esco_param_cvsd,
ARRAY_SIZE(esco_param_cvsd)))
return -EINVAL;
@@ -531,7 +534,7 @@ static bool hci_setup_sync_conn(struct hci_conn *conn, __u16 handle)
param = &esco_param_msbc[conn->attempt - 1];
break;
case SCO_AIRMODE_CVSD:
- if (lmp_esco_capable(conn->link)) {
+ if (conn->parent && lmp_esco_capable(conn->parent)) {
if (!find_next_esco_param(conn, esco_param_cvsd,
ARRAY_SIZE(esco_param_cvsd)))
return false;
@@ -637,21 +640,22 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __le64 rand,
/* Device _must_ be locked */
void hci_sco_setup(struct hci_conn *conn, __u8 status)
{
- struct hci_conn *sco = conn->link;
+ struct hci_link *link;
- if (!sco)
+ link = list_first_entry_or_null(&conn->link_list, struct hci_link, list);
+ if (!link || !link->conn)
return;
BT_DBG("hcon %p", conn);
if (!status) {
if (lmp_esco_capable(conn->hdev))
- hci_setup_sync(sco, conn->handle);
+ hci_setup_sync(link->conn, conn->handle);
else
- hci_add_sco(sco, conn->handle);
+ hci_add_sco(link->conn, conn->handle);
} else {
- hci_connect_cfm(sco, status);
- hci_conn_del(sco);
+ hci_connect_cfm(link->conn, status);
+ hci_conn_del(link->conn);
}
}
@@ -1042,6 +1046,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
skb_queue_head_init(&conn->data_q);
INIT_LIST_HEAD(&conn->chan_list);
+ INIT_LIST_HEAD(&conn->link_list);
INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
INIT_DELAYED_WORK(&conn->auto_accept_work, hci_conn_auto_accept);
@@ -1069,15 +1074,39 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst,
return conn;
}
-static bool hci_conn_unlink(struct hci_conn *conn)
+static void hci_conn_unlink(struct hci_conn *conn)
{
- if (!conn->link)
- return false;
+ struct hci_dev *hdev = conn->hdev;
- conn->link->link = NULL;
+ bt_dev_dbg(hdev, "hcon %p", conn);
+
+ if (!conn->parent) {
+ struct hci_link *link, *t;
+
+ list_for_each_entry_safe(link, t, &conn->link_list, list)
+ hci_conn_unlink(link->conn);
+
+ return;
+ }
+
+ if (!conn->link)
+ return;
+
+ hci_conn_put(conn->parent);
+ conn->parent = NULL;
+
+ list_del_rcu(&conn->link->list);
+ synchronize_rcu();
+
+ kfree(conn->link);
conn->link = NULL;
- return true;
+ /* Due to race, SCO connection might be not established
+ * yet at this point. Delete it now, otherwise it is
+ * possible for it to be stuck and can't be deleted.
+ */
+ if (conn->handle == HCI_CONN_HANDLE_UNSET)
+ hci_conn_del(conn);
}
int hci_conn_del(struct hci_conn *conn)
@@ -1091,18 +1120,7 @@ int hci_conn_del(struct hci_conn *conn)
cancel_delayed_work_sync(&conn->idle_work);
if (conn->type == ACL_LINK) {
- struct hci_conn *link = conn->link;
-
- if (link) {
- hci_conn_unlink(conn);
- /* Due to race, SCO connection might be not established
- * yet at this point. Delete it now, otherwise it is
- * possible for it to be stuck and can't be deleted.
- */
- if (link->handle == HCI_CONN_HANDLE_UNSET)
- hci_conn_del(link);
- }
-
+ hci_conn_unlink(conn);
/* Unacked frames */
hdev->acl_cnt += conn->sent;
} else if (conn->type == LE_LINK) {
@@ -1113,7 +1131,7 @@ int hci_conn_del(struct hci_conn *conn)
else
hdev->acl_cnt += conn->sent;
} else {
- struct hci_conn *acl = conn->link;
+ struct hci_conn *acl = conn->parent;
if (acl) {
hci_conn_unlink(conn);
@@ -1600,11 +1618,40 @@ struct hci_conn *hci_connect_acl(struct hci_dev *hdev, bdaddr_t *dst,
return acl;
}
+static struct hci_link *hci_conn_link(struct hci_conn *parent,
+ struct hci_conn *conn)
+{
+ struct hci_dev *hdev = parent->hdev;
+ struct hci_link *link;
+
+ bt_dev_dbg(hdev, "parent %p hcon %p", parent, conn);
+
+ if (conn->link)
+ return conn->link;
+
+ if (conn->parent)
+ return NULL;
+
+ link = kzalloc(sizeof(*link), GFP_KERNEL);
+ if (!link)
+ return NULL;
+
+ link->conn = hci_conn_hold(conn);
+ conn->link = link;
+ conn->parent = hci_conn_get(parent);
+
+ /* Use list_add_tail_rcu append to the list */
+ list_add_tail_rcu(&link->list, &parent->link_list);
+
+ return link;
+}
+
struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
__u16 setting, struct bt_codec *codec)
{
struct hci_conn *acl;
struct hci_conn *sco;
+ struct hci_link *link;
acl = hci_connect_acl(hdev, dst, BT_SECURITY_LOW, HCI_AT_NO_BONDING,
CONN_REASON_SCO_CONNECT);
@@ -1620,10 +1667,12 @@ struct hci_conn *hci_connect_sco(struct hci_dev *hdev, int type, bdaddr_t *dst,
}
}
- acl->link = sco;
- sco->link = acl;
-
- hci_conn_hold(sco);
+ link = hci_conn_link(acl, sco);
+ if (!link) {
+ hci_conn_drop(acl);
+ hci_conn_drop(sco);
+ return NULL;
+ }
sco->setting = setting;
sco->codec = *codec;
@@ -1891,7 +1940,7 @@ static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
u8 cig;
memset(&cmd, 0, sizeof(cmd));
- cmd.cis[0].acl_handle = cpu_to_le16(conn->link->handle);
+ cmd.cis[0].acl_handle = cpu_to_le16(conn->parent->handle);
cmd.cis[0].cis_handle = cpu_to_le16(conn->handle);
cmd.cp.num_cis++;
cig = conn->iso_qos.ucast.cig;
@@ -1904,11 +1953,12 @@ static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
struct hci_cis *cis = &cmd.cis[cmd.cp.num_cis];
if (conn == data || conn->type != ISO_LINK ||
- conn->state == BT_CONNECTED || conn->iso_qos.ucast.cig != cig)
+ conn->state == BT_CONNECTED ||
+ conn->iso_qos.ucast.cig != cig)
continue;
/* Check if all CIS(s) belonging to a CIG are ready */
- if (!conn->link || conn->link->state != BT_CONNECTED ||
+ if (!conn->parent || conn->parent->state != BT_CONNECTED ||
conn->state != BT_CONNECT) {
cmd.cp.num_cis = 0;
break;
@@ -1925,7 +1975,7 @@ static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
* command have been generated, the Controller shall return the
* error code Command Disallowed (0x0C).
*/
- cis->acl_handle = cpu_to_le16(conn->link->handle);
+ cis->acl_handle = cpu_to_le16(conn->parent->handle);
cis->cis_handle = cpu_to_le16(conn->handle);
cmd.cp.num_cis++;
}
@@ -1944,14 +1994,32 @@ static int hci_create_cis_sync(struct hci_dev *hdev, void *data)
int hci_le_create_cis(struct hci_conn *conn)
{
struct hci_conn *cis;
+ struct hci_link *link, *t;
struct hci_dev *hdev = conn->hdev;
int err;
+ bt_dev_dbg(hdev, "hcon %p", conn);
+
switch (conn->type) {
case LE_LINK:
- if (!conn->link || conn->state != BT_CONNECTED)
+ if (conn->state != BT_CONNECTED || list_empty(&conn->link_list))
return -EINVAL;
- cis = conn->link;
+
+ cis = NULL;
+
+ /* hci_conn_link uses list_add_tail_rcu so the list is in
+ * the same order as the connections are requested.
+ */
+ list_for_each_entry_safe(link, t, &conn->link_list, list) {
+ if (link->conn->state == BT_BOUND) {
+ cis = link->conn;
+ break;
+ }
+ }
+
+ if (!cis)
+ return -EINVAL;
+
break;
case ISO_LINK:
cis = conn;
@@ -2173,6 +2241,7 @@ struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
{
struct hci_conn *le;
struct hci_conn *cis;
+ struct hci_link *link;
if (hci_dev_test_flag(hdev, HCI_ADVERTISING))
le = hci_connect_le(hdev, dst, dst_type, false,
@@ -2198,16 +2267,18 @@ struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
return cis;
}
- le->link = cis;
- cis->link = le;
-
- hci_conn_hold(cis);
+ link = hci_conn_link(le, cis);
+ if (!link) {
+ hci_conn_drop(le);
+ hci_conn_drop(cis);
+ return NULL;
+ }
/* If LE is already connected and CIS handle is already set proceed to
* Create CIS immediately.
*/
if (le->state == BT_CONNECTED && cis->handle != HCI_CONN_HANDLE_UNSET)
- hci_le_create_cis(le);
+ hci_le_create_cis(cis);
return cis;
}
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 0e0a93cc1218..d00ef6e3fc45 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2345,7 +2345,8 @@ static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
{
struct hci_cp_add_sco *cp;
- struct hci_conn *acl, *sco;
+ struct hci_conn *acl;
+ struct hci_link *link;
__u16 handle;
bt_dev_dbg(hdev, "status 0x%2.2x", status);
@@ -2365,12 +2366,13 @@ static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
acl = hci_conn_hash_lookup_handle(hdev, handle);
if (acl) {
- sco = acl->link;
- if (sco) {
- sco->state = BT_CLOSED;
+ link = list_first_entry_or_null(&acl->link_list,
+ struct hci_link, list);
+ if (link && link->conn) {
+ link->conn->state = BT_CLOSED;
- hci_connect_cfm(sco, status);
- hci_conn_del(sco);
+ hci_connect_cfm(link->conn, status);
+ hci_conn_del(link->conn);
}
}
@@ -2637,11 +2639,34 @@ static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
hci_dev_unlock(hdev);
}
+static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
+ __u8 status)
+{
+ struct hci_conn *acl;
+ struct hci_link *link;
+
+ bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
+
+ hci_dev_lock(hdev);
+
+ acl = hci_conn_hash_lookup_handle(hdev, handle);
+ if (acl) {
+ link = list_first_entry_or_null(&acl->link_list,
+ struct hci_link, list);
+ if (link && link->conn) {
+ link->conn->state = BT_CLOSED;
+
+ hci_connect_cfm(link->conn, status);
+ hci_conn_del(link->conn);
+ }
+ }
+
+ hci_dev_unlock(hdev);
+}
+
static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
{
struct hci_cp_setup_sync_conn *cp;
- struct hci_conn *acl, *sco;
- __u16 handle;
bt_dev_dbg(hdev, "status 0x%2.2x", status);
@@ -2652,31 +2677,12 @@ static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
if (!cp)
return;
- handle = __le16_to_cpu(cp->handle);
-
- bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
-
- hci_dev_lock(hdev);
-
- acl = hci_conn_hash_lookup_handle(hdev, handle);
- if (acl) {
- sco = acl->link;
- if (sco) {
- sco->state = BT_CLOSED;
-
- hci_connect_cfm(sco, status);
- hci_conn_del(sco);
- }
- }
-
- hci_dev_unlock(hdev);
+ hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
}
static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
{
struct hci_cp_enhanced_setup_sync_conn *cp;
- struct hci_conn *acl, *sco;
- __u16 handle;
bt_dev_dbg(hdev, "status 0x%2.2x", status);
@@ -2687,24 +2693,7 @@ static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
if (!cp)
return;
- handle = __le16_to_cpu(cp->handle);
-
- bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
-
- hci_dev_lock(hdev);
-
- acl = hci_conn_hash_lookup_handle(hdev, handle);
- if (acl) {
- sco = acl->link;
- if (sco) {
- sco->state = BT_CLOSED;
-
- hci_connect_cfm(sco, status);
- hci_conn_del(sco);
- }
- }
-
- hci_dev_unlock(hdev);
+ hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
}
static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
@@ -3834,19 +3823,20 @@ static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
rcu_read_lock();
list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
- if (conn->type != ISO_LINK || conn->iso_qos.ucast.cig != rp->cig_id ||
+ if (conn->type != ISO_LINK ||
+ conn->iso_qos.ucast.cig != rp->cig_id ||
conn->state == BT_CONNECTED)
continue;
conn->handle = __le16_to_cpu(rp->handle[i++]);
- bt_dev_dbg(hdev, "%p handle 0x%4.4x link %p", conn,
- conn->handle, conn->link);
+ bt_dev_dbg(hdev, "%p handle 0x%4.4x parent %p", conn,
+ conn->handle, conn->parent);
/* Create CIS if LE is already connected */
- if (conn->link && conn->link->state == BT_CONNECTED) {
+ if (conn->parent && conn->parent->state == BT_CONNECTED) {
rcu_read_unlock();
- hci_le_create_cis(conn->link);
+ hci_le_create_cis(conn);
rcu_read_lock();
}
@@ -5031,7 +5021,7 @@ static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
if (conn->out) {
conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
(hdev->esco_type & EDR_ESCO_MASK);
- if (hci_setup_sync(conn, conn->link->handle))
+ if (hci_setup_sync(conn, conn->parent->handle))
goto unlock;
}
fallthrough;
diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c
index 74117df03a3f..34d55a85d8f6 100644
--- a/net/bluetooth/iso.c
+++ b/net/bluetooth/iso.c
@@ -1657,8 +1657,12 @@ static void iso_connect_cfm(struct hci_conn *hcon, __u8 status)
/* Check if LE link has failed */
if (status) {
- if (hcon->link)
- iso_conn_del(hcon->link, bt_to_errno(status));
+ struct hci_link *link, *t;
+
+ list_for_each_entry_safe(link, t, &hcon->link_list,
+ list)
+ iso_conn_del(link->conn, bt_to_errno(status));
+
return;
}
--
2.39.2
