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d58ff35122
It seems like a historic accident that these return unsigned char *,
and in many places that means casts are required, more often than not.
Make these functions return void * and remove all the casts across
the tree, adding a (u8 *) cast only where the unsigned char pointer
was used directly, all done with the following spatch:
@@
expression SKB, LEN;
typedef u8;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- *(fn(SKB, LEN))
+ *(u8 *)fn(SKB, LEN)
@@
expression E, SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
type T;
@@
- E = ((T *)(fn(SKB, LEN)))
+ E = fn(SKB, LEN)
@@
expression SKB, LEN;
identifier fn = { skb_push, __skb_push, skb_push_rcsum };
@@
- fn(SKB, LEN)[0]
+ *(u8 *)fn(SKB, LEN)
Note that the last part there converts from push(...)[0] to the
more idiomatic *(u8 *)push(...).
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
271 lines
6.2 KiB
C
271 lines
6.2 KiB
C
/*
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BlueZ - Bluetooth protocol stack for Linux
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Copyright (C) 2015 Intel Corporation
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2 as
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published by the Free Software Foundation;
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
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IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
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CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
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COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
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SOFTWARE IS DISCLAIMED.
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*/
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#include <asm/unaligned.h>
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#include <net/bluetooth/bluetooth.h>
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#include <net/bluetooth/hci_core.h>
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#include <net/bluetooth/hci_mon.h>
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#include <net/bluetooth/mgmt.h>
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#include "mgmt_util.h"
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static struct sk_buff *create_monitor_ctrl_event(__le16 index, u32 cookie,
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u16 opcode, u16 len, void *buf)
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{
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struct hci_mon_hdr *hdr;
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struct sk_buff *skb;
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skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
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if (!skb)
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return NULL;
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put_unaligned_le32(cookie, skb_put(skb, 4));
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put_unaligned_le16(opcode, skb_put(skb, 2));
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if (buf)
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skb_put_data(skb, buf, len);
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__net_timestamp(skb);
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hdr = skb_push(skb, HCI_MON_HDR_SIZE);
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hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
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hdr->index = index;
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hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
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return skb;
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}
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int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel,
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void *data, u16 data_len, int flag, struct sock *skip_sk)
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{
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struct sk_buff *skb;
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struct mgmt_hdr *hdr;
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skb = alloc_skb(sizeof(*hdr) + data_len, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hdr = skb_put(skb, sizeof(*hdr));
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hdr->opcode = cpu_to_le16(event);
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if (hdev)
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hdr->index = cpu_to_le16(hdev->id);
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else
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hdr->index = cpu_to_le16(MGMT_INDEX_NONE);
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hdr->len = cpu_to_le16(data_len);
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if (data)
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skb_put_data(skb, data, data_len);
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/* Time stamp */
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__net_timestamp(skb);
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hci_send_to_channel(channel, skb, flag, skip_sk);
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if (channel == HCI_CHANNEL_CONTROL)
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hci_send_monitor_ctrl_event(hdev, event, data, data_len,
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skb_get_ktime(skb), flag, skip_sk);
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kfree_skb(skb);
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return 0;
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}
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int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status)
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{
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struct sk_buff *skb, *mskb;
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struct mgmt_hdr *hdr;
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struct mgmt_ev_cmd_status *ev;
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int err;
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BT_DBG("sock %p, index %u, cmd %u, status %u", sk, index, cmd, status);
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skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hdr = skb_put(skb, sizeof(*hdr));
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hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
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hdr->index = cpu_to_le16(index);
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hdr->len = cpu_to_le16(sizeof(*ev));
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ev = skb_put(skb, sizeof(*ev));
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ev->status = status;
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ev->opcode = cpu_to_le16(cmd);
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mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk),
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MGMT_EV_CMD_STATUS, sizeof(*ev), ev);
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if (mskb)
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skb->tstamp = mskb->tstamp;
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else
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__net_timestamp(skb);
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err = sock_queue_rcv_skb(sk, skb);
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if (err < 0)
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kfree_skb(skb);
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if (mskb) {
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hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb,
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HCI_SOCK_TRUSTED, NULL);
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kfree_skb(mskb);
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}
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return err;
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}
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int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status,
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void *rp, size_t rp_len)
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{
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struct sk_buff *skb, *mskb;
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struct mgmt_hdr *hdr;
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struct mgmt_ev_cmd_complete *ev;
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int err;
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BT_DBG("sock %p", sk);
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skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL);
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if (!skb)
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return -ENOMEM;
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hdr = skb_put(skb, sizeof(*hdr));
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hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
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hdr->index = cpu_to_le16(index);
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hdr->len = cpu_to_le16(sizeof(*ev) + rp_len);
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ev = skb_put(skb, sizeof(*ev) + rp_len);
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ev->opcode = cpu_to_le16(cmd);
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ev->status = status;
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if (rp)
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memcpy(ev->data, rp, rp_len);
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mskb = create_monitor_ctrl_event(hdr->index, hci_sock_get_cookie(sk),
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MGMT_EV_CMD_COMPLETE,
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sizeof(*ev) + rp_len, ev);
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if (mskb)
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skb->tstamp = mskb->tstamp;
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else
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__net_timestamp(skb);
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err = sock_queue_rcv_skb(sk, skb);
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if (err < 0)
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kfree_skb(skb);
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if (mskb) {
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hci_send_to_channel(HCI_CHANNEL_MONITOR, mskb,
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HCI_SOCK_TRUSTED, NULL);
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kfree_skb(mskb);
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}
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return err;
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}
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struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode,
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struct hci_dev *hdev)
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{
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struct mgmt_pending_cmd *cmd;
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list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
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if (hci_sock_get_channel(cmd->sk) != channel)
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continue;
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if (cmd->opcode == opcode)
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return cmd;
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}
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return NULL;
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}
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struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel,
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u16 opcode,
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struct hci_dev *hdev,
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const void *data)
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{
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struct mgmt_pending_cmd *cmd;
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list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
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if (cmd->user_data != data)
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continue;
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if (cmd->opcode == opcode)
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return cmd;
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}
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return NULL;
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}
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void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
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void (*cb)(struct mgmt_pending_cmd *cmd, void *data),
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void *data)
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{
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struct mgmt_pending_cmd *cmd, *tmp;
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list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) {
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if (opcode > 0 && cmd->opcode != opcode)
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continue;
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cb(cmd, data);
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}
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}
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struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
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struct hci_dev *hdev,
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void *data, u16 len)
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{
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struct mgmt_pending_cmd *cmd;
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cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
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if (!cmd)
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return NULL;
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cmd->opcode = opcode;
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cmd->index = hdev->id;
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cmd->param = kmemdup(data, len, GFP_KERNEL);
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if (!cmd->param) {
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kfree(cmd);
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return NULL;
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}
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cmd->param_len = len;
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cmd->sk = sk;
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sock_hold(sk);
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list_add(&cmd->list, &hdev->mgmt_pending);
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return cmd;
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}
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void mgmt_pending_free(struct mgmt_pending_cmd *cmd)
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{
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sock_put(cmd->sk);
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kfree(cmd->param);
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kfree(cmd);
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}
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void mgmt_pending_remove(struct mgmt_pending_cmd *cmd)
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{
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list_del(&cmd->list);
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mgmt_pending_free(cmd);
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}
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