ar-internal.h

linux 内核源代码

 */
struct rxkad_key {
	u16	security_index;		/* RxRPC header security index */
	u16	ticket_len;		/* length of ticket[] */
	u32	expiry;			/* time at which expires */
	u32	kvno;			/* key version number */
	u8	session_key[8];		/* DES session key */
	u8	ticket[0];		/* the encrypted ticket */
};

struct rxrpc_key_payload {
	struct rxkad_key k;
};

/*
 * locally abort an RxRPC call
 */
static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code)
{
	write_lock_bh(&call->state_lock);
	if (call->state < RXRPC_CALL_COMPLETE) {
		call->abort_code = abort_code;
		call->state = RXRPC_CALL_LOCALLY_ABORTED;
		set_bit(RXRPC_CALL_ABORT, &call->events);
	}
	write_unlock_bh(&call->state_lock);
}

/*
 * af_rxrpc.c
 */
extern atomic_t rxrpc_n_skbs;
extern __be32 rxrpc_epoch;
extern atomic_t rxrpc_debug_id;
extern struct workqueue_struct *rxrpc_workqueue;

/*
 * ar-accept.c
 */
extern void rxrpc_accept_incoming_calls(struct work_struct *);
extern struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *,
					    unsigned long);
extern int rxrpc_reject_call(struct rxrpc_sock *);

/*
 * ar-ack.c
 */
extern void __rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool);
extern void rxrpc_propose_ACK(struct rxrpc_call *, uint8_t, __be32, bool);
extern void rxrpc_process_call(struct work_struct *);

/*
 * ar-call.c
 */
extern struct kmem_cache *rxrpc_call_jar;
extern struct list_head rxrpc_calls;
extern rwlock_t rxrpc_call_lock;

extern struct rxrpc_call *rxrpc_get_client_call(struct rxrpc_sock *,
						struct rxrpc_transport *,
						struct rxrpc_conn_bundle *,
						unsigned long, int, gfp_t);
extern struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
					      struct rxrpc_connection *,
					      struct rxrpc_header *, gfp_t);
extern struct rxrpc_call *rxrpc_find_server_call(struct rxrpc_sock *,
						 unsigned long);
extern void rxrpc_release_call(struct rxrpc_call *);
extern void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
extern void __rxrpc_put_call(struct rxrpc_call *);
extern void __exit rxrpc_destroy_all_calls(void);

/*
 * ar-connection.c
 */
extern struct list_head rxrpc_connections;
extern rwlock_t rxrpc_connection_lock;

extern struct rxrpc_conn_bundle *rxrpc_get_bundle(struct rxrpc_sock *,
						  struct rxrpc_transport *,
						  struct key *,
						  __be16, gfp_t);
extern void rxrpc_put_bundle(struct rxrpc_transport *,
			     struct rxrpc_conn_bundle *);
extern int rxrpc_connect_call(struct rxrpc_sock *, struct rxrpc_transport *,
			      struct rxrpc_conn_bundle *, struct rxrpc_call *,
			      gfp_t);
extern void rxrpc_put_connection(struct rxrpc_connection *);
extern void __exit rxrpc_destroy_all_connections(void);
extern struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_transport *,
						      struct rxrpc_header *);
extern struct rxrpc_connection *
rxrpc_incoming_connection(struct rxrpc_transport *, struct rxrpc_header *,
			  gfp_t);

/*
 * ar-connevent.c
 */
extern void rxrpc_process_connection(struct work_struct *);
extern void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
extern void rxrpc_reject_packets(struct work_struct *);

/*
 * ar-error.c
 */
extern void rxrpc_UDP_error_report(struct sock *);
extern void rxrpc_UDP_error_handler(struct work_struct *);

/*
 * ar-input.c
 */
extern unsigned long rxrpc_ack_timeout;
extern const char *rxrpc_pkts[];

extern void rxrpc_data_ready(struct sock *, int);
extern int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool,
			       bool);
extern void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);

/*
 * ar-local.c
 */
extern rwlock_t rxrpc_local_lock;
extern struct rxrpc_local *rxrpc_lookup_local(struct sockaddr_rxrpc *);
extern void rxrpc_put_local(struct rxrpc_local *);
extern void __exit rxrpc_destroy_all_locals(void);

/*
 * ar-key.c
 */
extern struct key_type key_type_rxrpc;
extern struct key_type key_type_rxrpc_s;

extern int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
extern int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
extern int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *,
				     time_t, u32);

/*
 * ar-output.c
 */
extern int rxrpc_resend_timeout;

extern int rxrpc_send_packet(struct rxrpc_transport *, struct sk_buff *);
extern int rxrpc_client_sendmsg(struct kiocb *, struct rxrpc_sock *,
				struct rxrpc_transport *, struct msghdr *,
				size_t);
extern int rxrpc_server_sendmsg(struct kiocb *, struct rxrpc_sock *,
				struct msghdr *, size_t);

/*
 * ar-peer.c
 */
extern struct rxrpc_peer *rxrpc_get_peer(struct sockaddr_rxrpc *, gfp_t);
extern void rxrpc_put_peer(struct rxrpc_peer *);
extern struct rxrpc_peer *rxrpc_find_peer(struct rxrpc_local *,
					  __be32, __be16);
extern void __exit rxrpc_destroy_all_peers(void);

/*
 * ar-proc.c
 */
extern const char *rxrpc_call_states[];
extern struct file_operations rxrpc_call_seq_fops;
extern struct file_operations rxrpc_connection_seq_fops;

/*
 * ar-recvmsg.c
 */
extern void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *);
extern int rxrpc_recvmsg(struct kiocb *, struct socket *, struct msghdr *,
			 size_t, int);

/*
 * ar-security.c
 */
extern int rxrpc_register_security(struct rxrpc_security *);
extern void rxrpc_unregister_security(struct rxrpc_security *);
extern int rxrpc_init_client_conn_security(struct rxrpc_connection *);
extern int rxrpc_init_server_conn_security(struct rxrpc_connection *);
extern int rxrpc_secure_packet(const struct rxrpc_call *, struct sk_buff *,
			       size_t, void *);
extern int rxrpc_verify_packet(const struct rxrpc_call *, struct sk_buff *,
			       u32 *);
extern void rxrpc_clear_conn_security(struct rxrpc_connection *);

/*
 * ar-skbuff.c
 */
extern void rxrpc_packet_destructor(struct sk_buff *);

/*
 * ar-transport.c
 */
extern struct rxrpc_transport *rxrpc_get_transport(struct rxrpc_local *,
						   struct rxrpc_peer *,
						   gfp_t);
extern void rxrpc_put_transport(struct rxrpc_transport *);
extern void __exit rxrpc_destroy_all_transports(void);
extern struct rxrpc_transport *rxrpc_find_transport(struct rxrpc_local *,
						    struct rxrpc_peer *);

/*
 * debug tracing
 */
extern unsigned rxrpc_debug;

#define dbgprintk(FMT,...) \
	printk("[%x%-6.6s] "FMT"\n", smp_processor_id(), current->comm ,##__VA_ARGS__)

/* make sure we maintain the format strings, even when debugging is disabled */
static inline __attribute__((format(printf,1,2)))
void _dbprintk(const char *fmt, ...)
{
}

#define kenter(FMT,...)	dbgprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
#define kleave(FMT,...)	dbgprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
#define kdebug(FMT,...)	dbgprintk("    "FMT ,##__VA_ARGS__)
#define kproto(FMT,...)	dbgprintk("### "FMT ,##__VA_ARGS__)
#define knet(FMT,...)	dbgprintk("@@@ "FMT ,##__VA_ARGS__)


#if defined(__KDEBUG)
#define _enter(FMT,...)	kenter(FMT,##__VA_ARGS__)
#define _leave(FMT,...)	kleave(FMT,##__VA_ARGS__)
#define _debug(FMT,...)	kdebug(FMT,##__VA_ARGS__)
#define _proto(FMT,...)	kproto(FMT,##__VA_ARGS__)
#define _net(FMT,...)	knet(FMT,##__VA_ARGS__)

#elif defined(CONFIG_AF_RXRPC_DEBUG)
#define RXRPC_DEBUG_KENTER	0x01
#define RXRPC_DEBUG_KLEAVE	0x02
#define RXRPC_DEBUG_KDEBUG	0x04
#define RXRPC_DEBUG_KPROTO	0x08
#define RXRPC_DEBUG_KNET	0x10

#define _enter(FMT,...)					\
do {							\
	if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER))	\
		kenter(FMT,##__VA_ARGS__);		\
} while (0)

#define _leave(FMT,...)					\
do {							\
	if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE))	\
		kleave(FMT,##__VA_ARGS__);		\
} while (0)

#define _debug(FMT,...)					\
do {							\
	if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG))	\
		kdebug(FMT,##__VA_ARGS__);		\
} while (0)

#define _proto(FMT,...)					\
do {							\
	if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO))	\
		kproto(FMT,##__VA_ARGS__);		\
} while (0)

#define _net(FMT,...)					\
do {							\
	if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET))	\
		knet(FMT,##__VA_ARGS__);		\
} while (0)

#else
#define _enter(FMT,...)	_dbprintk("==> %s("FMT")",__FUNCTION__ ,##__VA_ARGS__)
#define _leave(FMT,...)	_dbprintk("<== %s()"FMT"",__FUNCTION__ ,##__VA_ARGS__)
#define _debug(FMT,...)	_dbprintk("    "FMT ,##__VA_ARGS__)
#define _proto(FMT,...)	_dbprintk("### "FMT ,##__VA_ARGS__)
#define _net(FMT,...)	_dbprintk("@@@ "FMT ,##__VA_ARGS__)
#endif

/*
 * debug assertion checking
 */
#if 1 // defined(__KDEBUGALL)

#define ASSERT(X)						\
do {								\
	if (unlikely(!(X))) {					\
		printk(KERN_ERR "\n");				\
		printk(KERN_ERR "RxRPC: Assertion failed\n");	\
		BUG();						\
	}							\
} while(0)

#define ASSERTCMP(X, OP, Y)						\
do {									\
	if (unlikely(!((X) OP (Y)))) {					\
		printk(KERN_ERR "\n");					\
		printk(KERN_ERR "RxRPC: Assertion failed\n");		\
		printk(KERN_ERR "%lu " #OP " %lu is false\n",		\
		       (unsigned long)(X), (unsigned long)(Y));		\
		printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n",	\
		       (unsigned long)(X), (unsigned long)(Y));		\
		BUG();							\
	}								\
} while(0)

#define ASSERTIF(C, X)						\
do {								\
	if (unlikely((C) && !(X))) {				\
		printk(KERN_ERR "\n");				\
		printk(KERN_ERR "RxRPC: Assertion failed\n");	\
		BUG();						\
	}							\
} while(0)

#define ASSERTIFCMP(C, X, OP, Y)					\
do {									\
	if (unlikely((C) && !((X) OP (Y)))) {				\
		printk(KERN_ERR "\n");					\
		printk(KERN_ERR "RxRPC: Assertion failed\n");		\
		printk(KERN_ERR "%lu " #OP " %lu is false\n",		\
		       (unsigned long)(X), (unsigned long)(Y));		\
		printk(KERN_ERR "0x%lx " #OP " 0x%lx is false\n",	\
		       (unsigned long)(X), (unsigned long)(Y));		\
		BUG();							\
	}								\
} while(0)

#else

#define ASSERT(X)				\
do {						\
} while(0)

#define ASSERTCMP(X, OP, Y)			\
do {						\
} while(0)

#define ASSERTIF(C, X)				\
do {						\
} while(0)

#define ASSERTIFCMP(C, X, OP, Y)		\
do {						\
} while(0)

#endif /* __KDEBUGALL */

/*
 * socket buffer accounting / leak finding
 */
static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn)
{
	//_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
	//atomic_inc(&rxrpc_n_skbs);
}

#define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__)

static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn)
{
	//_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs));
	//atomic_dec(&rxrpc_n_skbs);
}

#define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__)

static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn)
{
	if (skb) {
		CHECK_SLAB_OKAY(&skb->users);
		//_net("free skb %p %s [%d]",
		//     skb, fn, atomic_read(&rxrpc_n_skbs));
		//atomic_dec(&rxrpc_n_skbs);
		kfree_skb(skb);
	}
}

#define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__)

static inline void rxrpc_purge_queue(struct sk_buff_head *list)
{
	struct sk_buff *skb;
	while ((skb = skb_dequeue((list))) != NULL)
		rxrpc_free_skb(skb);
}

static inline void __rxrpc_get_local(struct rxrpc_local *local, const char *f)
{
	CHECK_SLAB_OKAY(&local->usage);
	if (atomic_inc_return(&local->usage) == 1)
		printk("resurrected (%s)\n", f);
}

#define rxrpc_get_local(LOCAL) __rxrpc_get_local((LOCAL), __func__)

#define rxrpc_get_call(CALL)				\
do {							\
	CHECK_SLAB_OKAY(&(CALL)->usage);		\
	if (atomic_inc_return(&(CALL)->usage) == 1)	\
		BUG();					\
} while(0)

#define rxrpc_put_call(CALL)				\
do {							\
	__rxrpc_put_call(CALL);				\
} while(0)