Commit eec8d2bc authored by Johan Hedberg's avatar Johan Hedberg Committed by Gustavo F. Padovan

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: default avatarJohan Hedberg <johan.hedberg@nokia.com>
Signed-off-by: default avatarGustavo F. Padovan <padovan@profusion.mobi>
parent 5add6af8
......@@ -667,7 +667,8 @@ void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode);
void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data);
/* ----- HCI Sockets ----- */
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);
/* Management interface */
int mgmt_control(struct sock *sk, struct msghdr *msg, size_t len);
......
......@@ -58,6 +58,16 @@ struct mgmt_rp_read_info {
__u16 hci_rev;
} __packed;
#define MGMT_OP_SET_POWERED 0x0005
struct mgmt_cp_set_powered {
__le16 index;
__u8 powered;
} __packed;
struct mgmt_rp_set_powered {
__le16 index;
__u8 powered;
} __packed;
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
......
......@@ -1377,7 +1377,7 @@ static int hci_send_frame(struct sk_buff *skb)
/* 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 @@ static void hci_rx_task(unsigned long arg)
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)) {
......
......@@ -2083,6 +2083,6 @@ void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
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);
}
......@@ -85,7 +85,8 @@ static struct bt_sock_list hci_sk_list = {
};
/* 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 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
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;
......
......@@ -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 @@ static int read_controller_info(struct sock *sk, unsigned char *data, u16 len)
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 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
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 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
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 @@ static int mgmt_event(u16 event, void *data, u16 data_len)
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 @@ int mgmt_index_added(u16 index)
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 @@ int mgmt_index_removed(u16 index)
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;
}
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