mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
903e9d1bff
A small cleanup: this callback is never used. Originally fixed by Stanislav Kinsburskiy <skinsbursky@virtuozzo.com> for OpenVZ7 bug OVZ-6877 cc: stanislav.kinsburskiy@gmail.com Signed-off-by: Vasily Averin <vvs@virtuozzo.com> Signed-off-by: David S. Miller <davem@davemloft.net>
135 lines
3.8 KiB
C
135 lines
3.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* connector.h
|
|
*
|
|
* 2004-2005 Copyright (c) Evgeniy Polyakov <zbr@ioremap.net>
|
|
* All rights reserved.
|
|
*/
|
|
#ifndef __CONNECTOR_H
|
|
#define __CONNECTOR_H
|
|
|
|
|
|
#include <linux/refcount.h>
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <net/sock.h>
|
|
#include <uapi/linux/connector.h>
|
|
|
|
#define CN_CBQ_NAMELEN 32
|
|
|
|
struct cn_queue_dev {
|
|
atomic_t refcnt;
|
|
unsigned char name[CN_CBQ_NAMELEN];
|
|
|
|
struct list_head queue_list;
|
|
spinlock_t queue_lock;
|
|
|
|
struct sock *nls;
|
|
};
|
|
|
|
struct cn_callback_id {
|
|
unsigned char name[CN_CBQ_NAMELEN];
|
|
struct cb_id id;
|
|
};
|
|
|
|
struct cn_callback_entry {
|
|
struct list_head callback_entry;
|
|
refcount_t refcnt;
|
|
struct cn_queue_dev *pdev;
|
|
|
|
struct cn_callback_id id;
|
|
void (*callback) (struct cn_msg *, struct netlink_skb_parms *);
|
|
|
|
u32 seq, group;
|
|
};
|
|
|
|
struct cn_dev {
|
|
struct cb_id id;
|
|
|
|
u32 seq, groups;
|
|
struct sock *nls;
|
|
|
|
struct cn_queue_dev *cbdev;
|
|
};
|
|
|
|
/**
|
|
* cn_add_callback() - Registers new callback with connector core.
|
|
*
|
|
* @id: unique connector's user identifier.
|
|
* It must be registered in connector.h for legal
|
|
* in-kernel users.
|
|
* @name: connector's callback symbolic name.
|
|
* @callback: connector's callback.
|
|
* parameters are %cn_msg and the sender's credentials
|
|
*/
|
|
int cn_add_callback(struct cb_id *id, const char *name,
|
|
void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
|
|
/**
|
|
* cn_del_callback() - Unregisters new callback with connector core.
|
|
*
|
|
* @id: unique connector's user identifier.
|
|
*/
|
|
void cn_del_callback(struct cb_id *id);
|
|
|
|
|
|
/**
|
|
* cn_netlink_send_mult - Sends message to the specified groups.
|
|
*
|
|
* @msg: message header(with attached data).
|
|
* @len: Number of @msg to be sent.
|
|
* @portid: destination port.
|
|
* If non-zero the message will be sent to the given port,
|
|
* which should be set to the original sender.
|
|
* @group: destination group.
|
|
* If @portid and @group is zero, then appropriate group will
|
|
* be searched through all registered connector users, and
|
|
* message will be delivered to the group which was created
|
|
* for user with the same ID as in @msg.
|
|
* If @group is not zero, then message will be delivered
|
|
* to the specified group.
|
|
* @gfp_mask: GFP mask.
|
|
*
|
|
* It can be safely called from softirq context, but may silently
|
|
* fail under strong memory pressure.
|
|
*
|
|
* If there are no listeners for given group %-ESRCH can be returned.
|
|
*/
|
|
int cn_netlink_send_mult(struct cn_msg *msg, u16 len, u32 portid, u32 group, gfp_t gfp_mask);
|
|
|
|
/**
|
|
* cn_netlink_send_mult - Sends message to the specified groups.
|
|
*
|
|
* @msg: message header(with attached data).
|
|
* @portid: destination port.
|
|
* If non-zero the message will be sent to the given port,
|
|
* which should be set to the original sender.
|
|
* @group: destination group.
|
|
* If @portid and @group is zero, then appropriate group will
|
|
* be searched through all registered connector users, and
|
|
* message will be delivered to the group which was created
|
|
* for user with the same ID as in @msg.
|
|
* If @group is not zero, then message will be delivered
|
|
* to the specified group.
|
|
* @gfp_mask: GFP mask.
|
|
*
|
|
* It can be safely called from softirq context, but may silently
|
|
* fail under strong memory pressure.
|
|
*
|
|
* If there are no listeners for given group %-ESRCH can be returned.
|
|
*/
|
|
int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 group, gfp_t gfp_mask);
|
|
|
|
int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
|
|
struct cb_id *id,
|
|
void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
|
|
void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
|
|
void cn_queue_release_callback(struct cn_callback_entry *);
|
|
|
|
struct cn_queue_dev *cn_queue_alloc_dev(const char *name, struct sock *);
|
|
void cn_queue_free_dev(struct cn_queue_dev *dev);
|
|
|
|
int cn_cb_equal(struct cb_id *, struct cb_id *);
|
|
|
|
#endif /* __CONNECTOR_H */
|