Bluetooth: Move pending management command list into struct hci_dev

This patch moves the pending management command list (previously global
to mgmt.c) into struct hci_dev. This makes it possible to do proper
locking when accessing it (through the existing hci_dev locks) and
thereby avoid race conditions.

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

1 files changed, 39 insertions, 40 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 2ca7b4427e3..be198f382ed 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -43,8 +43,6 @@ struct pending_cmd {
         void *user_data;
 };
 
-static LIST_HEAD(cmd_list);
-
 static int cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status)
 {
         struct sk_buff *skb;
@@ -227,7 +225,8 @@ static void mgmt_pending_free(struct pending_cmd *cmd)
 }
 
 static struct pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
-                                                u16 index, void *data, u16 len)
+                                                        struct hci_dev *hdev,
+                                                        void *data, u16 len)
 {
         struct pending_cmd *cmd;
 
@@ -236,7 +235,7 @@ static struct pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
                 return NULL;
 
         cmd->opcode = opcode;
-        cmd->index = index;
+        cmd->index = hdev->id;
 
         cmd->param = kmalloc(len, GFP_ATOMIC);
         if (!cmd->param) {
@@ -250,7 +249,7 @@ static struct pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
         cmd->sk = sk;
         sock_hold(sk);
 
-        list_add(&cmd->list, &cmd_list);
+        list_add(&cmd->list, &hdev->mgmt_pending);
 
         return cmd;
 }
@@ -261,7 +260,7 @@ static void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
 {
         struct list_head *p, *n;
 
-        list_for_each_safe(p, n, &cmd_list) {
+        list_for_each_safe(p, n, &hdev->mgmt_pending) {
                 struct pending_cmd *cmd;
 
                 cmd = list_entry(p, struct pending_cmd, list);
@@ -276,15 +275,15 @@ static void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
         }
 }
 
-static struct pending_cmd *mgmt_pending_find(u16 opcode, int index)
+static struct pending_cmd *mgmt_pending_find(u16 opcode, struct hci_dev *hdev)
 {
         struct pending_cmd *cmd;
 
-        list_for_each_entry(cmd, &cmd_list, list) {
+        list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
                 if (cmd->opcode != opcode)
                         continue;
 
-                if (index >= 0 && cmd->index != index)
+                if (hdev && cmd->index != hdev->id)
                         continue;
 
                 return cmd;
@@ -325,12 +324,12 @@ static int set_powered(struct sock *sk, u16 index, unsigned char *data, u16 len)
                 goto failed;
         }
 
-        if (mgmt_pending_find(MGMT_OP_SET_POWERED, index)) {
+        if (mgmt_pending_find(MGMT_OP_SET_POWERED, hdev)) {
                 err = cmd_status(sk, index, MGMT_OP_SET_POWERED, EBUSY);
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_SET_POWERED, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -376,8 +375,8 @@ static int set_discoverable(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, index) ||
-                        mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, index)) {
+        if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
+                        mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
                 err = cmd_status(sk, index, MGMT_OP_SET_DISCOVERABLE, EBUSY);
                 goto failed;
         }
@@ -388,7 +387,7 @@ static int set_discoverable(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_SET_DISCOVERABLE, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -442,8 +441,8 @@ static int set_connectable(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, index) ||
-                        mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, index)) {
+        if (mgmt_pending_find(MGMT_OP_SET_DISCOVERABLE, hdev) ||
+                        mgmt_pending_find(MGMT_OP_SET_CONNECTABLE, hdev)) {
                 err = cmd_status(sk, index, MGMT_OP_SET_CONNECTABLE, EBUSY);
                 goto failed;
         }
@@ -453,7 +452,7 @@ static int set_connectable(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_SET_CONNECTABLE, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_SET_CONNECTABLE, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1038,7 +1037,7 @@ static int disconnect(struct sock *sk, u16 index, unsigned char *data, u16 len)
                 goto failed;
         }
 
-        if (mgmt_pending_find(MGMT_OP_DISCONNECT, index)) {
+        if (mgmt_pending_find(MGMT_OP_DISCONNECT, hdev)) {
                 err = cmd_status(sk, index, MGMT_OP_DISCONNECT, EBUSY);
                 goto failed;
         }
@@ -1052,7 +1051,7 @@ static int disconnect(struct sock *sk, u16 index, unsigned char *data, u16 len)
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1143,7 +1142,7 @@ static int send_pin_code_neg_reply(struct sock *sk, u16 index,
         struct pending_cmd *cmd;
         int err;
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_NEG_REPLY, index, cp,
+        cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_NEG_REPLY, hdev, cp,
                                                                 sizeof(*cp));
         if (!cmd)
                 return -ENOMEM;
@@ -1204,7 +1203,7 @@ static int pin_code_reply(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_REPLY, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_PIN_CODE_REPLY, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1297,7 +1296,7 @@ static inline struct pending_cmd *find_pairing(struct hci_conn *conn)
         struct hci_dev *hdev = conn->hdev;
         struct pending_cmd *cmd;
 
-        list_for_each_entry(cmd, &cmd_list, list) {
+        list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
                 if (cmd->opcode != MGMT_OP_PAIR_DEVICE)
                         continue;
 
@@ -1396,7 +1395,7 @@ static int pair_device(struct sock *sk, u16 index, unsigned char *data, u16 len)
                 goto unlock;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_PAIR_DEVICE, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 hci_conn_put(conn);
@@ -1458,7 +1457,7 @@ static int user_confirm_reply(struct sock *sk, u16 index, unsigned char *data,
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, mgmt_op, index, data, len);
+        cmd = mgmt_pending_add(sk, mgmt_op, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1495,7 +1494,7 @@ static int set_local_name(struct sock *sk, u16 index, unsigned char *data,
 
         hci_dev_lock_bh(hdev);
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_SET_LOCAL_NAME, index, data, len);
+        cmd = mgmt_pending_add(sk, MGMT_OP_SET_LOCAL_NAME, hdev, data, len);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1541,12 +1540,12 @@ static int read_local_oob_data(struct sock *sk, u16 index)
                 goto unlock;
         }
 
-        if (mgmt_pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, index)) {
+        if (mgmt_pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev)) {
                 err = cmd_status(sk, index, MGMT_OP_READ_LOCAL_OOB_DATA, EBUSY);
                 goto unlock;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_READ_LOCAL_OOB_DATA, index, NULL, 0);
+        cmd = mgmt_pending_add(sk, MGMT_OP_READ_LOCAL_OOB_DATA, hdev, NULL, 0);
         if (!cmd) {
                 err = -ENOMEM;
                 goto unlock;
@@ -1650,7 +1649,7 @@ static int start_discovery(struct sock *sk, u16 index)
                 goto failed;
         }
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_START_DISCOVERY, index, NULL, 0);
+        cmd = mgmt_pending_add(sk, MGMT_OP_START_DISCOVERY, hdev, NULL, 0);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -1681,7 +1680,7 @@ static int stop_discovery(struct sock *sk, u16 index)
 
         hci_dev_lock_bh(hdev);
 
-        cmd = mgmt_pending_add(sk, MGMT_OP_STOP_DISCOVERY, index, NULL, 0);
+        cmd = mgmt_pending_add(sk, MGMT_OP_STOP_DISCOVERY, hdev, NULL, 0);
         if (!cmd) {
                 err = -ENOMEM;
                 goto failed;
@@ -2147,7 +2146,7 @@ int mgmt_disconnect_failed(struct hci_dev *hdev)
         struct pending_cmd *cmd;
         int err;
 
-        cmd = mgmt_pending_find(MGMT_OP_DISCONNECT, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_DISCONNECT, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2188,7 +2187,7 @@ int mgmt_pin_code_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
         struct mgmt_rp_pin_code_reply rp;
         int err;
 
-        cmd = mgmt_pending_find(MGMT_OP_PIN_CODE_REPLY, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_PIN_CODE_REPLY, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2210,7 +2209,7 @@ int mgmt_pin_code_neg_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
         struct mgmt_rp_pin_code_reply rp;
         int err;
 
-        cmd = mgmt_pending_find(MGMT_OP_PIN_CODE_NEG_REPLY, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_PIN_CODE_NEG_REPLY, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2247,7 +2246,7 @@ static int confirm_reply_complete(struct hci_dev *hdev, bdaddr_t *bdaddr,
         struct mgmt_rp_user_confirm_reply rp;
         int err;
 
-        cmd = mgmt_pending_find(opcode, hdev->id);
+        cmd = mgmt_pending_find(opcode, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2293,7 +2292,7 @@ int mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status)
         memset(&ev, 0, sizeof(ev));
         memcpy(ev.name, name, HCI_MAX_NAME_LENGTH);
 
-        cmd = mgmt_pending_find(MGMT_OP_SET_LOCAL_NAME, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_SET_LOCAL_NAME, hdev);
         if (!cmd)
                 goto send_event;
 
@@ -2330,7 +2329,7 @@ int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
 
         BT_DBG("%s status %u", hdev->name, status);
 
-        cmd = mgmt_pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_READ_LOCAL_OOB_DATA, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2390,7 +2389,7 @@ int mgmt_inquiry_failed(struct hci_dev *hdev, u8 status)
         struct pending_cmd *cmd;
         int err;
 
-        cmd = mgmt_pending_find(MGMT_OP_START_DISCOVERY, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_START_DISCOVERY, hdev);
         if (!cmd)
                 return -ENOENT;
 
@@ -2405,9 +2404,9 @@ int mgmt_discovering(struct hci_dev *hdev, u8 discovering)
         struct pending_cmd *cmd;
 
         if (discovering)
-                cmd = mgmt_pending_find(MGMT_OP_START_DISCOVERY, hdev->id);
+                cmd = mgmt_pending_find(MGMT_OP_START_DISCOVERY, hdev);
         else
-                cmd = mgmt_pending_find(MGMT_OP_STOP_DISCOVERY, hdev->id);
+                cmd = mgmt_pending_find(MGMT_OP_STOP_DISCOVERY, hdev);
 
         if (cmd != NULL) {
                 cmd_complete(cmd->sk, hdev->id, cmd->opcode, NULL, 0);
@@ -2423,7 +2422,7 @@ int mgmt_device_blocked(struct hci_dev *hdev, bdaddr_t *bdaddr)
         struct pending_cmd *cmd;
         struct mgmt_ev_device_blocked ev;
 
-        cmd = mgmt_pending_find(MGMT_OP_BLOCK_DEVICE, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_BLOCK_DEVICE, hdev);
 
         bacpy(&ev.bdaddr, bdaddr);
 
@@ -2436,7 +2435,7 @@ int mgmt_device_unblocked(struct hci_dev *hdev, bdaddr_t *bdaddr)
         struct pending_cmd *cmd;
         struct mgmt_ev_device_unblocked ev;
 
-        cmd = mgmt_pending_find(MGMT_OP_UNBLOCK_DEVICE, hdev->id);
+        cmd = mgmt_pending_find(MGMT_OP_UNBLOCK_DEVICE, hdev);
 
         bacpy(&ev.bdaddr, bdaddr);