Release 4.7 include/linux/netlink.h

#ifndef __LINUX_NETLINK_H

#define __LINUX_NETLINK_H


#include <linux/capability.h>
#include <linux/skbuff.h>
#include <linux/export.h>
#include <net/scm.h>
#include <uapi/linux/netlink.h>

struct net;



static inline struct nlmsghdr *nlmsg_hdr(const struct sk_buff *skb)
{
	return (struct nlmsghdr *)skb->data;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
arnaldo carvalho de melo
arnaldo carvalho de melo
25
100.00%
1
100.00%
Total
25
100.00%
1
100.00%


enum netlink_skb_flags {
	
NETLINK_SKB_MMAPED	= 0x1,	/* Packet data is mmaped */
	
NETLINK_SKB_TX		= 0x2,	/* Packet was sent by userspace */
	
NETLINK_SKB_DELIVERED	= 0x4,	/* Packet was delivered */
	
NETLINK_SKB_DST		= 0x8,	/* Dst set in sendto or sendmsg */
};


struct netlink_skb_parms {
	
struct scm_creds	creds;		/* Skb credentials      */
	
__u32			portid;
	
__u32			dst_group;
	
__u32			flags;
	
struct sock		*sk;
	
bool			nsid_is_set;
	
int			nsid;
};


#define NETLINK_CB(skb)		(*(struct netlink_skb_parms*)&((skb)->cb))

#define NETLINK_CREDS(skb)	(&NETLINK_CB((skb)).creds)


extern void netlink_table_grab(void);
extern void netlink_table_ungrab(void);


#define NL_CFG_F_NONROOT_RECV	(1 << 0)

#define NL_CFG_F_NONROOT_SEND	(1 << 1)

/* optional Netlink kernel configuration parameters */

struct netlink_kernel_cfg {
	
unsigned int	groups;
	
unsigned int	flags;
	
void		(*input)(struct sk_buff *skb);
	
struct mutex	*cb_mutex;
	
int		(*bind)(struct net *net, int group);
	
void		(*unbind)(struct net *net, int group);
	
bool		(*compare)(struct net *net, struct sock *sk);
};

extern struct sock *__netlink_kernel_create(struct net *net, int unit,
					    struct module *module,
					    struct netlink_kernel_cfg *cfg);

static inline struct sock *

netlink_kernel_create(struct net *net, int unit, struct netlink_kernel_cfg *cfg)
{
	return __netlink_kernel_create(net, unit, THIS_MODULE, cfg);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pablo neira ayuso
pablo neira ayuso
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%

extern void netlink_kernel_release(struct sock *sk);
extern int __netlink_change_ngroups(struct sock *sk, unsigned int groups);
extern int netlink_change_ngroups(struct sock *sk, unsigned int groups);
extern void __netlink_clear_multicast_users(struct sock *sk, unsigned int group);
extern void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err);
extern int netlink_has_listeners(struct sock *sk, unsigned int group);

extern int netlink_unicast(struct sock *ssk, struct sk_buff *skb, __u32 portid, int nonblock);
extern int netlink_broadcast(struct sock *ssk, struct sk_buff *skb, __u32 portid,
			     __u32 group, gfp_t allocation);
extern int netlink_broadcast_filtered(struct sock *ssk, struct sk_buff *skb,
	__u32 portid, __u32 group, gfp_t allocation,
	int (*filter)(struct sock *dsk, struct sk_buff *skb, void *data),
	void *filter_data);
extern int netlink_set_err(struct sock *ssk, __u32 portid, __u32 group, int code);
extern int netlink_register_notifier(struct notifier_block *nb);
extern int netlink_unregister_notifier(struct notifier_block *nb);

/* finegrained unicast helpers: */
struct sock *netlink_getsockbyfilp(struct file *filp);
int netlink_attachskb(struct sock *sk, struct sk_buff *skb,
		      long *timeo, struct sock *ssk);
void netlink_detachskb(struct sock *sk, struct sk_buff *skb);
int netlink_sendskb(struct sock *sk, struct sk_buff *skb);


static inline struct sk_buff *

netlink_skb_clone(struct sk_buff *skb, gfp_t gfp_mask)
{
	struct sk_buff *nskb;

	nskb = skb_clone(skb, gfp_mask);
	if (!nskb)
		return NULL;

	/* This is a large skb, set destructor callback to release head */
	if (is_vmalloc_addr(skb->head))
		nskb->destructor = skb->destructor;

	return nskb;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pablo neira ayuso
pablo neira ayuso
60
100.00%
1
100.00%
Total
60
100.00%
1
100.00%

/*
 *      skb should fit one page. This choice is good for headerless malloc.
 *      But we should limit to 8K so that userspace does not have to
 *      use enormous buffer sizes on recvmsg() calls just to avoid
 *      MSG_TRUNC when PAGE_SIZE is very large.
 */
#if PAGE_SIZE < 8192UL

#define NLMSG_GOODSIZE	SKB_WITH_OVERHEAD(PAGE_SIZE)
#else

#define NLMSG_GOODSIZE	SKB_WITH_OVERHEAD(8192UL)
#endif


#define NLMSG_DEFAULT_SIZE (NLMSG_GOODSIZE - NLMSG_HDRLEN)



struct netlink_callback {
	
struct sk_buff		*skb;
	
const struct nlmsghdr	*nlh;
	
int			(*start)(struct netlink_callback *);
	
int			(*dump)(struct sk_buff * skb,
					struct netlink_callback *cb);
	
int			(*done)(struct netlink_callback *cb);
	
void			*data;
	/* the module that dump function belong to */
	
struct module		*module;
	
u16			family;
	
u16			min_dump_alloc;
	

unsigned int		prev_seq, seq;
	
long			args[6];
};


struct netlink_notify {
	
struct net *net;
	
u32 portid;
	
int protocol;
};

struct nlmsghdr *
__nlmsg_put(struct sk_buff *skb, u32 portid, u32 seq, int type, int len, int flags);


struct netlink_dump_control {
	
int (*start)(struct netlink_callback *);
	
int (*dump)(struct sk_buff *skb, struct netlink_callback *);
	
int (*done)(struct netlink_callback *);
	
void *data;
	
struct module *module;
	
u16 min_dump_alloc;
};

extern int __netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
				const struct nlmsghdr *nlh,
				struct netlink_dump_control *control);


static inline int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
				     const struct nlmsghdr *nlh,
				     struct netlink_dump_control *control)
{
	if (!control->module)
		control->module = THIS_MODULE;

	return __netlink_dump_start(ssk, skb, nlh, control);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
gao feng
gao feng
53
100.00%
1
100.00%
Total
53
100.00%
1
100.00%


struct netlink_tap {
	
struct net_device *dev;
	
struct module *module;
	
struct list_head list;
};

extern int netlink_add_tap(struct netlink_tap *nt);
extern int netlink_remove_tap(struct netlink_tap *nt);

bool __netlink_ns_capable(const struct netlink_skb_parms *nsp,
			  struct user_namespace *ns, int cap);
bool netlink_ns_capable(const struct sk_buff *skb,
			struct user_namespace *ns, int cap);
bool netlink_capable(const struct sk_buff *skb, int cap);
bool netlink_net_capable(const struct sk_buff *skb, int cap);

#endif	/* __LINUX_NETLINK_H */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
206
20.54%
4
6.25%
pablo neira ayuso
pablo neira ayuso
181
18.05%
9
14.06%
eric w. biederman
eric w. biederman
135
13.46%
7
10.94%
gao feng
gao feng
82
8.18%
2
3.12%
johannes berg
johannes berg
72
7.18%
6
9.38%
andrew morton
andrew morton
57
5.68%
1
1.56%
patrick mchardy
patrick mchardy
50
4.99%
9
14.06%
daniel borkmann
daniel borkmann
39
3.89%
1
1.56%
james morris
james morris
29
2.89%
1
1.56%
arnaldo carvalho de melo
arnaldo carvalho de melo
27
2.69%
2
3.12%
tom herbert
tom herbert
22
2.19%
1
1.56%
denys vlasenko
denys vlasenko
20
1.99%
1
1.56%
david s. miller
david s. miller
19
1.89%
4
6.25%
denis v. lunev
denis v. lunev
12
1.20%
2
3.12%
richard guy briggs
richard guy briggs
11
1.10%
1
1.56%
thomas graf
thomas graf
6
0.60%
2
3.12%
greg rose
greg rose
6
0.60%
1
1.56%
nicolas dichtel
nicolas dichtel
6
0.60%
1
1.56%
alexey kuznetsov
alexey kuznetsov
5
0.50%
1
1.56%
harald welte
harald welte
4
0.40%
1
1.56%
ollie wild
ollie wild
3
0.30%
1
1.56%
christoph hellwig
christoph hellwig
3
0.30%
1
1.56%
david howells
david howells
3
0.30%
1
1.56%
linus torvalds
linus torvalds
2
0.20%
1
1.56%
richard weinberger
richard weinberger
1
0.10%
1
1.56%
stephen hemminger
stephen hemminger
1
0.10%
1
1.56%
al viro
al viro
1
0.10%
1
1.56%
Total
1003
100.00%
64
100.00%
  
Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.