Bluetooth: Add read_index_list management command

This patch implements the read_index_list command through which
userspace can get a list of current adapter indices.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 53 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 3e24c0bf18e7..7a8e321875c9 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -62,6 +62,56 @@ static int read_version(struct sock *sk)
         return 0;
 }
 
+static int read_index_list(struct sock *sk)
+{
+        struct sk_buff *skb;
+        struct mgmt_hdr *hdr;
+        struct mgmt_ev_cmd_complete *ev;
+        struct mgmt_rp_read_index_list *rp;
+        struct list_head *p;
+        size_t body_len;
+        u16 count;
+        int i;
+
+        BT_DBG("sock %p", sk);
+
+        read_lock(&hci_dev_list_lock);
+
+        count = 0;
+        list_for_each(p, &hci_dev_list) {
+                count++;
+        }
+
+        body_len = sizeof(*ev) + sizeof(*rp) + (2 * count);
+        skb = alloc_skb(sizeof(*hdr) + body_len, GFP_ATOMIC);
+        if (!skb)
+                return -ENOMEM;
+
+        hdr = (void *) skb_put(skb, sizeof(*hdr));
+        hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
+        hdr->len = cpu_to_le16(body_len);
+
+        ev = (void *) skb_put(skb, sizeof(*ev));
+        put_unaligned_le16(MGMT_OP_READ_INDEX_LIST, &ev->opcode);
+
+        rp = (void *) skb_put(skb, sizeof(*rp) + (2 * count));
+        put_unaligned_le16(count, &rp->num_controllers);
+
+        i = 0;
+        list_for_each(p, &hci_dev_list) {
+                struct hci_dev *d = list_entry(p, struct hci_dev, list);
+                put_unaligned_le16(d->id, &rp->index[i++]);
+                BT_DBG("Added hci%u", d->id);
+        }
+
+        read_unlock(&hci_dev_list_lock);
+
+        if (sock_queue_rcv_skb(sk, skb) < 0)
+                kfree_skb(skb);
+
+        return 0;
+}
+
 static int cmd_status(struct sock *sk, u16 cmd, u8 status)
 {
         struct sk_buff *skb;
@@ -123,6 +173,9 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
         case MGMT_OP_READ_VERSION:
                 err = read_version(sk);
                 break;
+        case MGMT_OP_READ_INDEX_LIST:
+                err = read_index_list(sk);
+                break;
         default:
                 BT_DBG("Unknown op %u", opcode);
                 err = cmd_status(sk, opcode, 0x01);