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Bluetooth: bnep: Add support for get bnep features via ioctl

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This is needed if user space wants to know supported bnep features
by kernel, e.g. if kernel supports sending response to bnep setup
control message. By now there is no possibility to know supported
features by kernel in case of bnep. Ioctls allows only to add connection,
delete connection, get connection list, get connection info. Adding
connection if it's possible (establishing network device connection) is
equivalent to starting bnep session. Bnep session handles data queue of
transmit, receive messages over bnep channel. It means that if we add
connection the received/transmitted data will be parsed immediately. In
case of get bnep features we want to know before session start, if we
should leave setup data on socket queue and let kernel to handle with it,
or in case of no setup handling support, if we should pull this message
and handle setup response within user space.

Signed-off-by: Grzegorz Kolodziejczyk <grzegorz.kolodziejczyk@tieto.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Grzegorz Kolodziejczyk 2015-04-03 12:14:53 +02:00 committed by Marcel Holtmann
parent e0fdbab169
commit 0477e2e868
3 changed files with 10 additions and 0 deletions
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2
fs/compat_ioctl.c
View File

@ -570,6 +570,7 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, void __user *argp)
#define BNEPCONNDEL _IOW('B', 201, int)
#define BNEPGETCONNLIST _IOR('B', 210, int)
#define BNEPGETCONNINFO _IOR('B', 211, int)
#define BNEPGETSUPPFEAT _IOR('B', 212, int)
#define CMTPCONNADD _IOW('C', 200, int)
#define CMTPCONNDEL _IOW('C', 201, int)
@ -1247,6 +1248,7 @@ COMPATIBLE_IOCTL(BNEPCONNADD)
COMPATIBLE_IOCTL(BNEPCONNDEL)
COMPATIBLE_IOCTL(BNEPGETCONNLIST)
COMPATIBLE_IOCTL(BNEPGETCONNINFO)
COMPATIBLE_IOCTL(BNEPGETSUPPFEAT)
COMPATIBLE_IOCTL(CMTPCONNADD)
COMPATIBLE_IOCTL(CMTPCONNDEL)
COMPATIBLE_IOCTL(CMTPGETCONNLIST)

1
net/bluetooth/bnep/bnep.h
View File

@ -111,6 +111,7 @@ struct bnep_ext_hdr {
#define BNEPCONNDEL _IOW('B', 201, int)
#define BNEPGETCONNLIST _IOR('B', 210, int)
#define BNEPGETCONNINFO _IOR('B', 211, int)
#define BNEPGETSUPPFEAT _IOR('B', 212, int)
struct bnep_connadd_req {
int sock; /* Connected socket */

7
net/bluetooth/bnep/sock.c
View File

@ -57,6 +57,7 @@ static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
struct bnep_conninfo ci;
struct socket *nsock;
void __user *argp = (void __user *)arg;
__u32 supp_feat = 0;
int err;
BT_DBG("cmd %x arg %lx", cmd, arg);
@ -120,6 +121,12 @@ static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
return err;
case BNEPGETSUPPFEAT:
if (copy_to_user(argp, &supp_feat, sizeof(supp_feat)))
return -EFAULT;
return 0;
default:
return -EINVAL;
}