Bluetooth: Add support for set_powered management command
This patch adds a set_powered command to the management interface
through which the powered state of local adapters can be controlled.
Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index c5a78e7..dfc4ef9 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -1377,7 +1377,7 @@
/* Time stamp */
__net_timestamp(skb);
- hci_send_to_sock(hdev, skb);
+ hci_send_to_sock(hdev, skb, NULL);
}
/* Get rid of skb owner, prior to sending to the driver. */
@@ -1767,7 +1767,7 @@
while ((skb = skb_dequeue(&hdev->rx_q))) {
if (atomic_read(&hdev->promisc)) {
/* Send copy to the sockets */
- hci_send_to_sock(hdev, skb);
+ hci_send_to_sock(hdev, skb, NULL);
}
if (test_bit(HCI_RAW, &hdev->flags)) {
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index a290854..d42fb35 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2083,6 +2083,6 @@
bt_cb(skb)->pkt_type = HCI_EVENT_PKT;
skb->dev = (void *) hdev;
- hci_send_to_sock(hdev, skb);
+ hci_send_to_sock(hdev, skb, NULL);
kfree_skb(skb);
}
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 29827c7..d50e961 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -85,7 +85,8 @@
};
/* Send frame to RAW socket */
-void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
+void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
+ struct sock *skip_sk)
{
struct sock *sk;
struct hlist_node *node;
@@ -97,6 +98,9 @@
struct hci_filter *flt;
struct sk_buff *nskb;
+ if (sk == skip_sk)
+ continue;
+
if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
continue;
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index f746e19..b65b6ca 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -32,6 +32,16 @@
#define MGMT_VERSION 0
#define MGMT_REVISION 1
+struct pending_cmd {
+ struct list_head list;
+ __u16 opcode;
+ int index;
+ void *cmd;
+ struct sock *sk;
+};
+
+LIST_HEAD(cmd_list);
+
static int cmd_status(struct sock *sk, u16 cmd, u8 status)
{
struct sk_buff *skb;
@@ -220,6 +230,129 @@
return 0;
}
+static void mgmt_pending_free(struct pending_cmd *cmd)
+{
+ sock_put(cmd->sk);
+ kfree(cmd->cmd);
+ kfree(cmd);
+}
+
+static int mgmt_pending_add(struct sock *sk, u16 opcode, int index,
+ void *data, u16 len)
+{
+ struct pending_cmd *cmd;
+
+ cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC);
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd->opcode = opcode;
+ cmd->index = index;
+
+ cmd->cmd = kmalloc(len, GFP_ATOMIC);
+ if (!cmd->cmd) {
+ kfree(cmd);
+ return -ENOMEM;
+ }
+
+ memcpy(cmd->cmd, data, len);
+
+ cmd->sk = sk;
+ sock_hold(sk);
+
+ list_add(&cmd->list, &cmd_list);
+
+ return 0;
+}
+
+static void mgmt_pending_foreach(u16 opcode, int index,
+ void (*cb)(struct pending_cmd *cmd, void *data),
+ void *data)
+{
+ struct list_head *p, *n;
+
+ list_for_each_safe(p, n, &cmd_list) {
+ struct pending_cmd *cmd;
+
+ cmd = list_entry(p, struct pending_cmd, list);
+
+ if (cmd->opcode != opcode)
+ continue;
+
+ if (index >= 0 && cmd->index != index)
+ continue;
+
+ cb(cmd, data);
+ }
+}
+
+static struct pending_cmd *mgmt_pending_find(u16 opcode, int index)
+{
+ struct list_head *p;
+
+ list_for_each(p, &cmd_list) {
+ struct pending_cmd *cmd;
+
+ cmd = list_entry(p, struct pending_cmd, list);
+
+ if (cmd->opcode != opcode)
+ continue;
+
+ if (index >= 0 && cmd->index != index)
+ continue;
+
+ return cmd;
+ }
+
+ return NULL;
+}
+
+static int set_powered(struct sock *sk, unsigned char *data, u16 len)
+{
+ struct mgmt_cp_set_powered *cp;
+ struct hci_dev *hdev;
+ u16 dev_id;
+ int ret, up;
+
+ cp = (void *) data;
+ dev_id = get_unaligned_le16(&cp->index);
+
+ BT_DBG("request for hci%u", dev_id);
+
+ hdev = hci_dev_get(dev_id);
+ if (!hdev)
+ return cmd_status(sk, MGMT_OP_SET_POWERED, ENODEV);
+
+ hci_dev_lock_bh(hdev);
+
+ up = test_bit(HCI_UP, &hdev->flags);
+ if ((cp->powered && up) || (!cp->powered && !up)) {
+ ret = cmd_status(sk, MGMT_OP_SET_POWERED, EALREADY);
+ goto failed;
+ }
+
+ if (mgmt_pending_find(MGMT_OP_SET_POWERED, dev_id)) {
+ ret = cmd_status(sk, MGMT_OP_SET_POWERED, EBUSY);
+ goto failed;
+ }
+
+ ret = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, dev_id, data, len);
+ if (ret < 0)
+ goto failed;
+
+ if (cp->powered)
+ queue_work(hdev->workqueue, &hdev->power_on);
+ else
+ queue_work(hdev->workqueue, &hdev->power_off);
+
+ ret = 0;
+
+failed:
+ hci_dev_unlock_bh(hdev);
+ hci_dev_put(hdev);
+ return ret;
+}
+
int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
{
unsigned char *buf;
@@ -260,6 +393,9 @@
case MGMT_OP_READ_INFO:
err = read_controller_info(sk, buf + sizeof(*hdr), len);
break;
+ case MGMT_OP_SET_POWERED:
+ err = set_powered(sk, buf + sizeof(*hdr), len);
+ break;
default:
BT_DBG("Unknown op %u", opcode);
err = cmd_status(sk, opcode, 0x01);
@@ -276,7 +412,7 @@
return err;
}
-static int mgmt_event(u16 event, void *data, u16 data_len)
+static int mgmt_event(u16 event, void *data, u16 data_len, struct sock *skip_sk)
{
struct sk_buff *skb;
struct mgmt_hdr *hdr;
@@ -293,7 +429,7 @@
memcpy(skb_put(skb, data_len), data, data_len);
- hci_send_to_sock(NULL, skb);
+ hci_send_to_sock(NULL, skb, skip_sk);
kfree_skb(skb);
return 0;
@@ -305,7 +441,7 @@
put_unaligned_le16(index, &ev.index);
- return mgmt_event(MGMT_EV_INDEX_ADDED, &ev, sizeof(ev));
+ return mgmt_event(MGMT_EV_INDEX_ADDED, &ev, sizeof(ev), NULL);
}
int mgmt_index_removed(u16 index)
@@ -314,15 +450,69 @@
put_unaligned_le16(index, &ev.index);
- return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev));
+ return mgmt_event(MGMT_EV_INDEX_REMOVED, &ev, sizeof(ev), NULL);
+}
+
+struct powered_lookup {
+ u8 powered;
+ struct sock *sk;
+};
+
+static void power_rsp(struct pending_cmd *cmd, void *data)
+{
+ struct mgmt_hdr *hdr;
+ struct mgmt_ev_cmd_complete *ev;
+ struct mgmt_rp_set_powered *rp;
+ struct mgmt_cp_set_powered *cp = cmd->cmd;
+ struct sk_buff *skb;
+ struct powered_lookup *match = data;
+
+ if (cp->powered != match->powered)
+ return;
+
+ skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC);
+ if (!skb)
+ return;
+
+ hdr = (void *) skb_put(skb, sizeof(*hdr));
+ hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+ hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp));
+
+ ev = (void *) skb_put(skb, sizeof(*ev));
+ put_unaligned_le16(cmd->opcode, &ev->opcode);
+
+ rp = (void *) skb_put(skb, sizeof(*rp));
+ put_unaligned_le16(cmd->index, &rp->index);
+ rp->powered = cp->powered;
+
+ if (sock_queue_rcv_skb(cmd->sk, skb) < 0)
+ kfree_skb(skb);
+
+ list_del(&cmd->list);
+
+ if (match->sk == NULL) {
+ match->sk = cmd->sk;
+ sock_hold(match->sk);
+ }
+
+ mgmt_pending_free(cmd);
}
int mgmt_powered(u16 index, u8 powered)
{
struct mgmt_ev_powered ev;
+ struct powered_lookup match = { powered, NULL };
+ int ret;
put_unaligned_le16(index, &ev.index);
ev.powered = powered;
- return mgmt_event(MGMT_EV_POWERED, &ev, sizeof(ev));
+ mgmt_pending_foreach(MGMT_OP_SET_POWERED, index, power_rsp, &match);
+
+ ret = mgmt_event(MGMT_EV_POWERED, &ev, sizeof(ev), match.sk);
+
+ if (match.sk)
+ sock_put(match.sk);
+
+ return ret;
}