mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-12 01:46:43 +07:00
0741241c6b
The connector documentation states that the argument to the callback function is always a pointer to a struct cn_msg, but rather than encode it in the API itself, it uses a void pointer everywhere. This doesn't make much sense to encode the pointer in documentation as it prevents proper C type checking from occurring and can easily allow people to use the wrong pointer type. So convert the argument type to an explicit struct cn_msg pointer. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: David S. Miller <davem@davemloft.net>
188 lines
4.3 KiB
C
188 lines
4.3 KiB
C
/*
|
|
* connector.h
|
|
*
|
|
* 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef __CONNECTOR_H
|
|
#define __CONNECTOR_H
|
|
|
|
#include <linux/types.h>
|
|
|
|
#define CN_IDX_CONNECTOR 0xffffffff
|
|
#define CN_VAL_CONNECTOR 0xffffffff
|
|
|
|
/*
|
|
* Process Events connector unique ids -- used for message routing
|
|
*/
|
|
#define CN_IDX_PROC 0x1
|
|
#define CN_VAL_PROC 0x1
|
|
#define CN_IDX_CIFS 0x2
|
|
#define CN_VAL_CIFS 0x1
|
|
#define CN_W1_IDX 0x3 /* w1 communication */
|
|
#define CN_W1_VAL 0x1
|
|
#define CN_IDX_V86D 0x4
|
|
#define CN_VAL_V86D_UVESAFB 0x1
|
|
#define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */
|
|
#define CN_DST_IDX 0x6
|
|
#define CN_DST_VAL 0x1
|
|
#define CN_IDX_DM 0x7 /* Device Mapper */
|
|
#define CN_VAL_DM_USERSPACE_LOG 0x1
|
|
|
|
#define CN_NETLINK_USERS 8
|
|
|
|
/*
|
|
* Maximum connector's message size.
|
|
*/
|
|
#define CONNECTOR_MAX_MSG_SIZE 16384
|
|
|
|
/*
|
|
* idx and val are unique identifiers which
|
|
* are used for message routing and
|
|
* must be registered in connector.h for in-kernel usage.
|
|
*/
|
|
|
|
struct cb_id {
|
|
__u32 idx;
|
|
__u32 val;
|
|
};
|
|
|
|
struct cn_msg {
|
|
struct cb_id id;
|
|
|
|
__u32 seq;
|
|
__u32 ack;
|
|
|
|
__u16 len; /* Length of the following data */
|
|
__u16 flags;
|
|
__u8 data[0];
|
|
};
|
|
|
|
/*
|
|
* Notify structure - requests notification about
|
|
* registering/unregistering idx/val in range [first, first+range].
|
|
*/
|
|
struct cn_notify_req {
|
|
__u32 first;
|
|
__u32 range;
|
|
};
|
|
|
|
/*
|
|
* Main notification control message
|
|
* *_notify_num - number of appropriate cn_notify_req structures after
|
|
* this struct.
|
|
* group - notification receiver's idx.
|
|
* len - total length of the attached data.
|
|
*/
|
|
struct cn_ctl_msg {
|
|
__u32 idx_notify_num;
|
|
__u32 val_notify_num;
|
|
__u32 group;
|
|
__u32 len;
|
|
__u8 data[0];
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/atomic.h>
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <net/sock.h>
|
|
|
|
#define CN_CBQ_NAMELEN 32
|
|
|
|
struct cn_queue_dev {
|
|
atomic_t refcnt;
|
|
unsigned char name[CN_CBQ_NAMELEN];
|
|
|
|
struct workqueue_struct *cn_queue;
|
|
/* Sent to kevent to create cn_queue only when needed */
|
|
struct work_struct wq_creation;
|
|
/* Tell if the wq_creation job is pending/completed */
|
|
atomic_t wq_requested;
|
|
/* Wait for cn_queue to be created */
|
|
wait_queue_head_t wq_created;
|
|
|
|
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_data {
|
|
void (*destruct_data) (void *);
|
|
void *ddata;
|
|
|
|
void *callback_priv;
|
|
void (*callback) (struct cn_msg *);
|
|
|
|
void *free;
|
|
};
|
|
|
|
struct cn_callback_entry {
|
|
struct list_head callback_entry;
|
|
struct work_struct work;
|
|
struct cn_queue_dev *pdev;
|
|
|
|
struct cn_callback_id id;
|
|
struct cn_callback_data data;
|
|
|
|
u32 seq, group;
|
|
};
|
|
|
|
struct cn_ctl_entry {
|
|
struct list_head notify_entry;
|
|
struct cn_ctl_msg *msg;
|
|
};
|
|
|
|
struct cn_dev {
|
|
struct cb_id id;
|
|
|
|
u32 seq, groups;
|
|
struct sock *nls;
|
|
void (*input) (struct sk_buff *skb);
|
|
|
|
struct cn_queue_dev *cbdev;
|
|
};
|
|
|
|
int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *));
|
|
void cn_del_callback(struct cb_id *);
|
|
int cn_netlink_send(struct cn_msg *, u32, gfp_t);
|
|
|
|
int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(struct cn_msg *));
|
|
void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
|
|
|
|
int queue_cn_work(struct cn_callback_entry *cbq, struct work_struct *work);
|
|
|
|
struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
|
|
void cn_queue_free_dev(struct cn_queue_dev *dev);
|
|
|
|
int cn_cb_equal(struct cb_id *, struct cb_id *);
|
|
|
|
void cn_queue_wrapper(struct work_struct *work);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __CONNECTOR_H */
|