cregit-Linux how code gets into the kernel

Release 4.8 net/rxrpc/ar-internal.h

Directory: net/rxrpc
/* AF_RXRPC internal definitions
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * 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.
 */

#include <linux/atomic.h>
#include <linux/seqlock.h>
#include <net/sock.h>
#include <net/af_rxrpc.h>
#include <rxrpc/packet.h>

#if 0
#define CHECK_SLAB_OKAY(X)				     \
	BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
               (POISON_FREE << 8 | POISON_FREE))
#else

#define CHECK_SLAB_OKAY(X) do {} while (0)
#endif


#define FCRYPT_BSIZE 8

struct rxrpc_crypt {
	union {
		
u8	x[FCRYPT_BSIZE];
		
__be32	n[2];
	};
} __attribute__((aligned(8)));


#define rxrpc_queue_work(WS)	queue_work(rxrpc_workqueue, (WS))

#define rxrpc_queue_delayed_work(WS,D)	\
	queue_delayed_work(rxrpc_workqueue, (WS), (D))


#define rxrpc_queue_call(CALL)	rxrpc_queue_work(&(CALL)->processor)

struct rxrpc_connection;

/*
 * sk_state for RxRPC sockets
 */
enum {
	
RXRPC_UNBOUND = 0,
	
RXRPC_CLIENT_UNBOUND,		/* Unbound socket used as client */
	
RXRPC_CLIENT_BOUND,		/* client local address bound */
	
RXRPC_SERVER_BOUND,		/* server local address bound */
	
RXRPC_SERVER_LISTENING,		/* server listening for connections */
	
RXRPC_CLOSE,			/* socket is being closed */
};

/*
 * RxRPC socket definition
 */

struct rxrpc_sock {
	/* WARNING: sk has to be the first member */
	
struct sock		sk;
	
rxrpc_interceptor_t	interceptor;	/* kernel service Rx interceptor function */
	
struct rxrpc_local	*local;		/* local endpoint */
	
struct list_head	listen_link;	/* link in the local endpoint's listen list */
	
struct list_head	secureq;	/* calls awaiting connection security clearance */
	
struct list_head	acceptq;	/* calls awaiting acceptance */
	
struct key		*key;		/* security for this socket */
	
struct key		*securities;	/* list of server security descriptors */
	
struct rb_root		calls;		/* outstanding calls on this socket */
	
unsigned long		flags;

#define RXRPC_SOCK_CONNECTED		0	/* connect_srx is set */
	
rwlock_t		call_lock;	/* lock for calls */
	
u32			min_sec_level;	/* minimum security level */

#define RXRPC_SECURITY_MAX	RXRPC_SECURITY_ENCRYPT
	
bool			exclusive;	/* Exclusive connection for a client socket */
	
sa_family_t		family;		/* Protocol family created with */
	
struct sockaddr_rxrpc	srx;		/* local address */
	
struct sockaddr_rxrpc	connect_srx;	/* Default client address from connect() */
};


#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)

/*
 * CPU-byteorder normalised Rx packet header.
 */

struct rxrpc_host_header {
	
u32		epoch;		/* client boot timestamp */
	
u32		cid;		/* connection and channel ID */
	
u32		callNumber;	/* call ID (0 for connection-level packets) */
	
u32		seq;		/* sequence number of pkt in call stream */
	
u32		serial;		/* serial number of pkt sent to network */
	
u8		type;		/* packet type */
	
u8		flags;		/* packet flags */
	
u8		userStatus;	/* app-layer defined status */
	
u8		securityIndex;	/* security protocol ID */
	union {
		
u16	_rsvd;		/* reserved */
		
u16	cksum;		/* kerberos security checksum */
	};
	
u16		serviceId;	/* service ID */
} 
__packed;

/*
 * RxRPC socket buffer private variables
 * - max 48 bytes (struct sk_buff::cb)
 */

struct rxrpc_skb_priv {
	
struct rxrpc_call	*call;		/* call with which associated */
	
unsigned long		resend_at;	/* time in jiffies at which to resend */
	union {
		
unsigned int	offset;		/* offset into buffer of next read */
		
int		remain;		/* amount of space remaining for next write */
		
u32		error;		/* network error code */
		
bool		need_resend;	/* T if needs resending */
	};

	
struct rxrpc_host_header hdr;		/* RxRPC packet header from this packet */
};


#define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)


enum rxrpc_command {
	
RXRPC_CMD_SEND_DATA,		/* send data message */
	
RXRPC_CMD_SEND_ABORT,		/* request abort generation */
	
RXRPC_CMD_ACCEPT,		/* [server] accept incoming call */
	
RXRPC_CMD_REJECT_BUSY,		/* [server] reject a call as busy */
};

/*
 * RxRPC security module interface
 */

struct rxrpc_security {
	
const char		*name;		/* name of this service */
	
u8			security_index;	/* security type provided */

	/* Initialise a security service */
	
int (*init)(void);

	/* Clean up a security service */
	
void (*exit)(void);

	/* initialise a connection's security */
	
int (*init_connection_security)(struct rxrpc_connection *);

	/* prime a connection's packet security */
	
int (*prime_packet_security)(struct rxrpc_connection *);

	/* impose security on a packet */
	
int (*secure_packet)(struct rxrpc_call *,
			     struct sk_buff *,
			     size_t,
			     void *);

	/* verify the security on a received packet */
	
int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *);

	/* issue a challenge */
	
int (*issue_challenge)(struct rxrpc_connection *);

	/* respond to a challenge */
	
int (*respond_to_challenge)(struct rxrpc_connection *,
				    struct sk_buff *,
				    u32 *);

	/* verify a response */
	
int (*verify_response)(struct rxrpc_connection *,
			       struct sk_buff *,
			       u32 *);

	/* clear connection security */
	
void (*clear)(struct rxrpc_connection *);
};

/*
 * RxRPC local transport endpoint description
 * - owned by a single AF_RXRPC socket
 * - pointed to by transport socket struct sk_user_data
 */

struct rxrpc_local {
	
struct rcu_head		rcu;
	
atomic_t		usage;
	
struct list_head	link;
	
struct socket		*socket;	/* my UDP socket */
	
struct work_struct	processor;
	
struct list_head	services;	/* services listening on this endpoint */
	
struct rw_semaphore	defrag_sem;	/* control re-enablement of IP DF bit */
	
struct sk_buff_head	accept_queue;	/* incoming calls awaiting acceptance */
	
struct sk_buff_head	reject_queue;	/* packets awaiting rejection */
	
struct sk_buff_head	event_queue;	/* endpoint event packets awaiting processing */
	
struct rb_root		client_conns;	/* Client connections by socket params */
	
spinlock_t		client_conns_lock; /* Lock for client_conns */
	
spinlock_t		lock;		/* access lock */
	
rwlock_t		services_lock;	/* lock for services list */
	
int			debug_id;	/* debug ID for printks */
	
bool			dead;
	
struct sockaddr_rxrpc	srx;		/* local address */
};

/*
 * RxRPC remote transport endpoint definition
 * - matched by local endpoint, remote port, address and protocol type
 */

struct rxrpc_peer {
	
struct rcu_head		rcu;		/* This must be first */
	
atomic_t		usage;
	
unsigned long		hash_key;
	
struct hlist_node	hash_link;
	
struct rxrpc_local	*local;
	
struct hlist_head	error_targets;	/* targets for net error distribution */
	
struct work_struct	error_distributor;
	
struct rb_root		service_conns;	/* Service connections */
	
seqlock_t		service_conn_lock;
	
spinlock_t		lock;		/* access lock */
	
unsigned int		if_mtu;		/* interface MTU for this peer */
	
unsigned int		mtu;		/* network MTU for this peer */
	
unsigned int		maxdata;	/* data size (MTU - hdrsize) */
	
unsigned short		hdrsize;	/* header size (IP + UDP + RxRPC) */
	
int			debug_id;	/* debug ID for printks */
	
int			error_report;	/* Net (+0) or local (+1000000) to distribute */

#define RXRPC_LOCAL_ERROR_OFFSET 1000000
	
struct sockaddr_rxrpc	srx;		/* remote address */

	/* calculated RTT cache */

#define RXRPC_RTT_CACHE_SIZE 32
	
suseconds_t		rtt;		/* current RTT estimate (in uS) */
	
unsigned int		rtt_point;	/* next entry at which to insert */
	
unsigned int		rtt_usage;	/* amount of cache actually used */
	
suseconds_t		rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
};

/*
 * Keys for matching a connection.
 */

struct rxrpc_conn_proto {
	union {
		struct {
			
u32	epoch;		/* epoch of this connection */
			
u32	cid;		/* connection ID */
		};
		
u64		index_key;
	};
};


struct rxrpc_conn_parameters {
	
struct rxrpc_local	*local;		/* Representation of local endpoint */
	
struct rxrpc_peer	*peer;		/* Remote endpoint */
	
struct key		*key;		/* Security details */
	
bool			exclusive;	/* T if conn is exclusive */
	
u16			service_id;	/* Service ID for this connection */
	
u32			security_level;	/* Security level selected */
};

/*
 * Bits in the connection flags.
 */

enum rxrpc_conn_flag {
	
RXRPC_CONN_HAS_IDR,		/* Has a client conn ID assigned */
	
RXRPC_CONN_IN_SERVICE_CONNS,	/* Conn is in peer->service_conns */
	
RXRPC_CONN_IN_CLIENT_CONNS,	/* Conn is in local->client_conns */
};

/*
 * Events that can be raised upon a connection.
 */

enum rxrpc_conn_event {
	
RXRPC_CONN_EV_CHALLENGE,	/* Send challenge packet */
};

/*
 * The connection protocol state.
 */

enum rxrpc_conn_proto_state {
	
RXRPC_CONN_UNUSED,		/* Connection not yet attempted */
	
RXRPC_CONN_CLIENT,		/* Client connection */
	
RXRPC_CONN_SERVICE_UNSECURED,	/* Service unsecured connection */
	
RXRPC_CONN_SERVICE_CHALLENGING,	/* Service challenging for security */
	
RXRPC_CONN_SERVICE,		/* Service secured connection */
	
RXRPC_CONN_REMOTELY_ABORTED,	/* Conn aborted by peer */
	
RXRPC_CONN_LOCALLY_ABORTED,	/* Conn aborted locally */
	
RXRPC_CONN_NETWORK_ERROR,	/* Conn terminated by network error */
	
RXRPC_CONN__NR_STATES
};

/*
 * RxRPC connection definition
 * - matched by { local, peer, epoch, conn_id, direction }
 * - each connection can only handle four simultaneous calls
 */

struct rxrpc_connection {
	
struct rxrpc_conn_proto	proto;
	
struct rxrpc_conn_parameters params;

	
spinlock_t		channel_lock;

	
struct rxrpc_channel {
		
struct rxrpc_call __rcu	*call;		/* Active call */
		
u32			call_id;	/* ID of current call */
		
u32			call_counter;	/* Call ID counter */
		
u32			last_call;	/* ID of last call */
		
u32			last_result;	/* Result of last call (0/abort) */
	} 
channels[RXRPC_MAXCALLS];
	
wait_queue_head_t	channel_wq;	/* queue to wait for channel to become available */

	
struct rcu_head		rcu;
	
struct work_struct	processor;	/* connection event processor */
	union {
		
struct rb_node	client_node;	/* Node in local->client_conns */
		
struct rb_node	service_node;	/* Node in peer->service_conns */
	};
	
struct list_head	link;		/* link in master connection list */
	
struct sk_buff_head	rx_queue;	/* received conn-level packets */
	
const struct rxrpc_security *security;	/* applied security module */
	
struct key		*server_key;	/* security for this service */
	
struct crypto_skcipher	*cipher;	/* encryption handle */
	
struct rxrpc_crypt	csum_iv;	/* packet checksum base */
	
unsigned long		flags;
	
unsigned long		events;
	
unsigned long		put_time;	/* Time at which last put */
	
spinlock_t		state_lock;	/* state-change lock */
	
atomic_t		usage;
	
enum rxrpc_conn_proto_state state : 8;	/* current state of connection */
	
u32			local_abort;	/* local abort code */
	
u32			remote_abort;	/* remote abort code */
	
int			error;		/* local error incurred */
	
int			debug_id;	/* debug ID for printks */
	
atomic_t		serial;		/* packet serial number counter */
	
atomic_t		hi_serial;	/* highest serial number received */
	
atomic_t		avail_chans;	/* number of channels available */
	
u8			size_align;	/* data size alignment (for security) */
	
u8			header_size;	/* rxrpc + security header size */
	
u8			security_size;	/* security header size */
	
u32			security_nonce;	/* response re-use preventer */
	
u8			security_ix;	/* security type */
	
u8			out_clientflag;	/* RXRPC_CLIENT_INITIATED if we are client */
};

/*
 * Flags in call->flags.
 */

enum rxrpc_call_flag {
	
RXRPC_CALL_RELEASED,		/* call has been released - no more message to userspace */
	
RXRPC_CALL_TERMINAL_MSG,	/* call has given the socket its final message */
	
RXRPC_CALL_RCVD_LAST,		/* all packets received */
	
RXRPC_CALL_RUN_RTIMER,		/* Tx resend timer started */
	
RXRPC_CALL_TX_SOFT_ACK,		/* sent some soft ACKs */
	
RXRPC_CALL_PROC_BUSY,		/* the processor is busy */
	
RXRPC_CALL_INIT_ACCEPT,		/* acceptance was initiated */
	
RXRPC_CALL_HAS_USERID,		/* has a user ID attached */
	
RXRPC_CALL_EXPECT_OOS,		/* expect out of sequence packets */
};

/*
 * Events that can be raised on a call.
 */

enum rxrpc_call_event {
	
RXRPC_CALL_EV_RCVD_ACKALL,	/* ACKALL or reply received */
	
RXRPC_CALL_EV_RCVD_BUSY,	/* busy packet received */
	
RXRPC_CALL_EV_RCVD_ABORT,	/* abort packet received */
	
RXRPC_CALL_EV_RCVD_ERROR,	/* network error received */
	
RXRPC_CALL_EV_ACK_FINAL,	/* need to generate final ACK (and release call) */
	
RXRPC_CALL_EV_ACK,		/* need to generate ACK */
	
RXRPC_CALL_EV_REJECT_BUSY,	/* need to generate busy message */
	
RXRPC_CALL_EV_ABORT,		/* need to generate abort */
	
RXRPC_CALL_EV_CONN_ABORT,	/* local connection abort generated */
	
RXRPC_CALL_EV_RESEND_TIMER,	/* Tx resend timer expired */
	
RXRPC_CALL_EV_RESEND,		/* Tx resend required */
	
RXRPC_CALL_EV_DRAIN_RX_OOS,	/* drain the Rx out of sequence queue */
	
RXRPC_CALL_EV_LIFE_TIMER,	/* call's lifetimer ran out */
	
RXRPC_CALL_EV_ACCEPTED,		/* incoming call accepted by userspace app */
	
RXRPC_CALL_EV_SECURED,		/* incoming call's connection is now secure */
	
RXRPC_CALL_EV_POST_ACCEPT,	/* need to post an "accept?" message to the app */
	
RXRPC_CALL_EV_RELEASE,		/* need to release the call's resources */
};

/*
 * The states that a call can be in.
 */

enum rxrpc_call_state {
	
RXRPC_CALL_UNINITIALISED,
	
RXRPC_CALL_CLIENT_AWAIT_CONN,	/* - client waiting for connection to become available */
	
RXRPC_CALL_CLIENT_SEND_REQUEST,	/* - client sending request phase */
	
RXRPC_CALL_CLIENT_AWAIT_REPLY,	/* - client awaiting reply */
	
RXRPC_CALL_CLIENT_RECV_REPLY,	/* - client receiving reply phase */
	
RXRPC_CALL_CLIENT_FINAL_ACK,	/* - client sending final ACK phase */
	
RXRPC_CALL_SERVER_SECURING,	/* - server securing request connection */
	
RXRPC_CALL_SERVER_ACCEPTING,	/* - server accepting request */
	
RXRPC_CALL_SERVER_RECV_REQUEST,	/* - server receiving request */
	
RXRPC_CALL_SERVER_ACK_REQUEST,	/* - server pending ACK of request */
	
RXRPC_CALL_SERVER_SEND_REPLY,	/* - server sending reply */
	
RXRPC_CALL_SERVER_AWAIT_ACK,	/* - server awaiting final ACK */
	
RXRPC_CALL_COMPLETE,		/* - call completed */
	
RXRPC_CALL_SERVER_BUSY,		/* - call rejected by busy server */
	
RXRPC_CALL_REMOTELY_ABORTED,	/* - call aborted by peer */
	
RXRPC_CALL_LOCALLY_ABORTED,	/* - call aborted locally on error or close */
	
RXRPC_CALL_NETWORK_ERROR,	/* - call terminated by network error */
	
RXRPC_CALL_DEAD,		/* - call is dead */
	
NR__RXRPC_CALL_STATES
};

/*
 * RxRPC call definition
 * - matched by { connection, call_id }
 */

struct rxrpc_call {
	
struct rcu_head		rcu;
	
struct rxrpc_connection	*conn;		/* connection carrying call */
	
struct rxrpc_sock	*socket;	/* socket responsible */
	
struct timer_list	lifetimer;	/* lifetime remaining on call */
	
struct timer_list	deadspan;	/* reap timer for re-ACK'ing, etc  */
	
struct timer_list	ack_timer;	/* ACK generation timer */
	
struct timer_list	resend_timer;	/* Tx resend timer */
	
struct work_struct	destroyer;	/* call destroyer */
	
struct work_struct	processor;	/* packet processor and ACK generator */
	
struct list_head	link;		/* link in master call list */
	
struct hlist_node	error_link;	/* link in error distribution list */
	
struct list_head	accept_link;	/* calls awaiting acceptance */
	
struct rb_node		sock_node;	/* node in socket call tree */
	
struct sk_buff_head	rx_queue;	/* received packets */
	
struct sk_buff_head	rx_oos_queue;	/* packets received out of sequence */
	
struct sk_buff		*tx_pending;	/* Tx socket buffer being filled */
	
wait_queue_head_t	tx_waitq;	/* wait for Tx window space to become available */
	
__be32			crypto_buf[2];	/* Temporary packet crypto buffer */
	
unsigned long		user_call_ID;	/* user-defined call ID */
	
unsigned long		creation_jif;	/* time of call creation */
	
unsigned long		flags;
	
unsigned long		events;
	
spinlock_t		lock;
	
rwlock_t		state_lock;	/* lock for state transition */
	
atomic_t		usage;
	
atomic_t		skb_count;	/* Outstanding packets on this call */
	
atomic_t		sequence;	/* Tx data packet sequence counter */
	
u32			local_abort;	/* local abort code */
	
u32			remote_abort;	/* remote abort code */
	
int			error_report;	/* Network error (ICMP/local transport) */
	
int			error;		/* Local error incurred */
	
enum rxrpc_call_state	state : 8;	/* current state of call */
	
int			debug_id;	/* debug ID for printks */
	
u8			channel;	/* connection channel occupied by this call */

	/* transmission-phase ACK management */
	
u8			acks_head;	/* offset into window of first entry */
	
u8			acks_tail;	/* offset into window of last entry */
	
u8			acks_winsz;	/* size of un-ACK'd window */
	
u8			acks_unacked;	/* lowest unacked packet in last ACK received */
	
int			acks_latest;	/* serial number of latest ACK received */
	
rxrpc_seq_t		acks_hard;	/* highest definitively ACK'd msg seq */
	
unsigned long		*acks_window;	/* sent packet window
                                                 * - elements are pointers with LSB set if ACK'd
                                                 */

	/* receive-phase ACK management */
	
rxrpc_seq_t		rx_data_expect;	/* next data seq ID expected to be received */
	
rxrpc_seq_t		rx_data_post;	/* next data seq ID expected to be posted */
	
rxrpc_seq_t		rx_data_recv;	/* last data seq ID encountered by recvmsg */
	
rxrpc_seq_t		rx_data_eaten;	/* last data seq ID consumed by recvmsg */
	
rxrpc_seq_t		rx_first_oos;	/* first packet in rx_oos_queue (or 0) */
	
rxrpc_seq_t		ackr_win_top;	/* top of ACK window (rx_data_eaten is bottom) */
	
rxrpc_seq_t		ackr_prev_seq;	/* previous sequence number received */
	
u8			ackr_reason;	/* reason to ACK */
	
rxrpc_serial_t		ackr_serial;	/* serial of packet being ACK'd */
	
atomic_t		ackr_not_idle;	/* number of packets in Rx queue */

	/* received packet records, 1 bit per record */

#define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
	
unsigned long		ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];

	
u8			in_clientflag;	/* Copy of conn->in_clientflag */
	
struct rxrpc_local	*local;		/* Local endpoint. */
	
u32			call_id;	/* call ID on connection  */
	
u32			cid;		/* connection ID plus channel index */
	
u32			epoch;		/* epoch of this connection */
	
u16			service_id;	/* service ID */
};

/*
 * 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->local_abort = abort_code; call->state = RXRPC_CALL_LOCALLY_ABORTED; set_bit(RXRPC_CALL_EV_ABORT, &call->events); } write_unlock_bh(&call->state_lock); }

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/* * af_rxrpc.c */ extern atomic_t rxrpc_n_skbs; extern u32 rxrpc_epoch; extern atomic_t rxrpc_debug_id; extern struct workqueue_struct *rxrpc_workqueue; /* * call_accept.c */ void rxrpc_accept_incoming_calls(struct rxrpc_local *); struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); int rxrpc_reject_call(struct rxrpc_sock *); /* * call_event.c */ void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); void rxrpc_process_call(struct work_struct *); /* * call_object.c */ extern unsigned int rxrpc_max_call_lifetime; extern unsigned int rxrpc_dead_call_expiry; extern struct kmem_cache *rxrpc_call_jar; extern struct list_head rxrpc_calls; extern rwlock_t rxrpc_call_lock; struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, unsigned long, gfp_t); struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_connection *, struct sk_buff *); void rxrpc_release_call(struct rxrpc_call *); void rxrpc_release_calls_on_socket(struct rxrpc_sock *); void __rxrpc_put_call(struct rxrpc_call *); void __exit rxrpc_destroy_all_calls(void); /* * conn_client.c */ extern struct idr rxrpc_client_conn_ids; void rxrpc_destroy_client_conn_ids(void); int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, struct sockaddr_rxrpc *, gfp_t); void rxrpc_unpublish_client_conn(struct rxrpc_connection *); /* * conn_event.c */ void rxrpc_process_connection(struct work_struct *); void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); void rxrpc_reject_packets(struct rxrpc_local *); /* * conn_object.c */ extern unsigned int rxrpc_connection_expiry; extern struct list_head rxrpc_connections; extern rwlock_t rxrpc_connection_lock; int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, struct sk_buff *); void __rxrpc_disconnect_call(struct rxrpc_call *); void rxrpc_disconnect_call(struct rxrpc_call *); void rxrpc_put_connection(struct rxrpc_connection *); void __exit rxrpc_destroy_all_connections(void);
static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) { return conn->out_clientflag; }

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static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) { return !rxrpc_conn_is_client(conn); }

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static inline void rxrpc_get_connection(struct rxrpc_connection *conn) { atomic_inc(&conn->usage); }

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static inline struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn) { return atomic_inc_not_zero(&conn->usage) ? conn : NULL; }

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static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) { if (!rxrpc_get_connection_maybe(conn)) return false; if (!rxrpc_queue_work(&conn->processor)) rxrpc_put_connection(conn); return true; }

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/* * conn_service.c */ struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, struct sk_buff *); struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, struct sockaddr_rxrpc *, struct sk_buff *); void rxrpc_unpublish_service_conn(struct rxrpc_connection *); /* * input.c */ void rxrpc_data_ready(struct sock *); int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); /* * insecure.c */ extern const struct rxrpc_security rxrpc_no_security; /* * key.c */ extern struct key_type key_type_rxrpc; extern struct key_type key_type_rxrpc_s; int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, u32); /* * local_event.c */ extern void rxrpc_process_local_events(struct rxrpc_local *); /* * local_object.c */ struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); void __rxrpc_put_local(struct rxrpc_local *); void __exit rxrpc_destroy_all_locals(void);
static inline void rxrpc_get_local(struct rxrpc_local *local) { atomic_inc(&local->usage); }

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static inline struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) { return atomic_inc_not_zero(&local->usage) ? local : NULL; }

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static inline void rxrpc_put_local(struct rxrpc_local *local) { if (local && atomic_dec_and_test(&local->usage)) __rxrpc_put_local(local); }

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static inline void rxrpc_queue_local(struct rxrpc_local *local) { rxrpc_queue_work(&local->processor); }

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/* * misc.c */ extern unsigned int rxrpc_max_backlog __read_mostly; extern unsigned int rxrpc_requested_ack_delay; extern unsigned int rxrpc_soft_ack_delay; extern unsigned int rxrpc_idle_ack_delay; extern unsigned int rxrpc_rx_window_size; extern unsigned int rxrpc_rx_mtu; extern unsigned int rxrpc_rx_jumbo_max; extern const char *const rxrpc_pkts[]; extern const s8 rxrpc_ack_priority[]; extern const char *rxrpc_acks(u8 reason); /* * output.c */ extern unsigned int rxrpc_resend_timeout; int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); /* * peer_event.c */ void rxrpc_error_report(struct sock *); void rxrpc_peer_error_distributor(struct work_struct *); /* * peer_object.c */ struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, const struct sockaddr_rxrpc *); struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, struct sockaddr_rxrpc *, gfp_t); struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
static inline void rxrpc_get_peer(struct rxrpc_peer *peer) { atomic_inc(&peer->usage); }

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static inline struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) { return atomic_inc_not_zero(&peer->usage) ? peer : NULL; }

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extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
static inline void rxrpc_put_peer(struct rxrpc_peer *peer) { if (peer && atomic_dec_and_test(&peer->usage)) __rxrpc_put_peer(peer); }

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/* * proc.c */ extern const char *const rxrpc_call_states[]; extern const struct file_operations rxrpc_call_seq_fops; extern const struct file_operations rxrpc_connection_seq_fops; /* * recvmsg.c */ void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); /* * rxkad.c */ #ifdef CONFIG_RXKAD extern const struct rxrpc_security rxkad; #endif /* * security.c */ int __init rxrpc_init_security(void); void rxrpc_exit_security(void