Linux-2.6.33.2/net/rxrpc/ar-internal.h
/* 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 <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)
#define rxrpc_queue_conn(CONN) rxrpc_queue_work(&(CONN)->processor)
/*
* sk_state for RxRPC sockets
*/
enum {
RXRPC_UNCONNECTED = 0,
RXRPC_CLIENT_BOUND, /* client local address bound */
RXRPC_CLIENT_CONNECTED, /* client is connected */
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 rxrpc_transport *trans; /* transport handler */
struct rxrpc_conn_bundle *bundle; /* virtual connection bundle */
struct rxrpc_connection *conn; /* exclusive virtual connection */
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_EXCLUSIVE_CONN 1 /* exclusive connection for a client socket */
rwlock_t call_lock; /* lock for calls */
u32 min_sec_level; /* minimum security level */
#define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT
struct sockaddr_rxrpc srx; /* local address */
sa_family_t proto; /* protocol created with */
__be16 service_id; /* service ID of local/remote service */
};
#define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
/*
* 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 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_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 {
struct module *owner; /* providing module */
struct list_head link; /* link in master list */
const char *name; /* name of this service */
u8 security_index; /* security type provided */
/* initialise a connection's security */
int (*init_connection_security)(struct rxrpc_connection *);
/* prime a connection's packet security */
void (*prime_packet_security)(struct rxrpc_connection *);
/* impose security on a packet */
int (*secure_packet)(const struct rxrpc_call *,
struct sk_buff *,
size_t,
void *);
/* verify the security on a received packet */
int (*verify_packet)(const 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 definition
* - matched by local port, address and protocol type
*/
struct rxrpc_local {
struct socket *socket; /* my UDP socket */
struct work_struct destroyer; /* endpoint destroyer */
struct work_struct acceptor; /* incoming call processor */
struct work_struct rejecter; /* packet reject writer */
struct list_head services; /* services listening on this endpoint */
struct list_head link; /* link in endpoint list */
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 */
spinlock_t lock; /* access lock */
rwlock_t services_lock; /* lock for services list */
atomic_t usage;
int debug_id; /* debug ID for printks */
volatile char error_rcvd; /* T if received ICMP error outstanding */
struct sockaddr_rxrpc srx; /* local address */
};
/*
* RxRPC remote transport endpoint definition
* - matched by remote port, address and protocol type
* - holds the connection ID counter for connections between the two endpoints
*/
struct rxrpc_peer {
struct work_struct destroyer; /* peer destroyer */
struct list_head link; /* link in master peer list */
struct list_head error_targets; /* targets for net error distribution */
spinlock_t lock; /* access lock */
atomic_t usage;
unsigned if_mtu; /* interface MTU for this peer */
unsigned mtu; /* network MTU for this peer */
unsigned maxdata; /* data size (MTU - hdrsize) */
unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */
int debug_id; /* debug ID for printks */
int net_error; /* network error distributed */
struct sockaddr_rxrpc srx; /* remote address */
/* calculated RTT cache */
#define RXRPC_RTT_CACHE_SIZE 32
suseconds_t rtt; /* current RTT estimate (in uS) */
unsigned rtt_point; /* next entry at which to insert */
unsigned rtt_usage; /* amount of cache actually used */
suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
};
/*
* RxRPC point-to-point transport / connection manager definition
* - handles a bundle of connections between two endpoints
* - matched by { local, peer }
*/
struct rxrpc_transport {
struct rxrpc_local *local; /* local transport endpoint */
struct rxrpc_peer *peer; /* remote transport endpoint */
struct work_struct error_handler; /* network error distributor */
struct rb_root bundles; /* client connection bundles on this transport */
struct rb_root client_conns; /* client connections on this transport */
struct rb_root server_conns; /* server connections on this transport */
struct list_head link; /* link in master session list */
struct sk_buff_head error_queue; /* error packets awaiting processing */
time_t put_time; /* time at which to reap */
spinlock_t client_lock; /* client connection allocation lock */
rwlock_t conn_lock; /* lock for active/dead connections */
atomic_t usage;
int debug_id; /* debug ID for printks */
unsigned int conn_idcounter; /* connection ID counter (client) */
};
/*
* RxRPC client connection bundle
* - matched by { transport, service_id, key }
*/
struct rxrpc_conn_bundle {
struct rb_node node; /* node in transport's lookup tree */
struct list_head unused_conns; /* unused connections in this bundle */
struct list_head avail_conns; /* available connections in this bundle */
struct list_head busy_conns; /* busy connections in this bundle */
struct key *key; /* security for this bundle */
wait_queue_head_t chanwait; /* wait for channel to become available */
atomic_t usage;
int debug_id; /* debug ID for printks */
unsigned short num_conns; /* number of connections in this bundle */
__be16 service_id; /* service ID */
u8 security_ix; /* security type */
};
/*
* RxRPC connection definition
* - matched by { transport, service_id, conn_id, direction, key }
* - each connection can only handle four simultaneous calls
*/
struct rxrpc_connection {
struct rxrpc_transport *trans; /* transport session */
struct rxrpc_conn_bundle *bundle; /* connection bundle (client) */
struct work_struct processor; /* connection event processor */
struct rb_node node; /* node in transport's lookup tree */
struct list_head link; /* link in master connection list */
struct list_head bundle_link; /* link in bundle */
struct rb_root calls; /* calls on this connection */
struct sk_buff_head rx_queue; /* received conn-level packets */
struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* channels (active calls) */
struct rxrpc_security *security; /* applied security module */
struct key *key; /* security for this connection (client) */
struct key *server_key; /* security for this service */
struct crypto_blkcipher *cipher; /* encryption handle */
struct rxrpc_crypt csum_iv; /* packet checksum base */
unsigned long events;
#define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */
time_t put_time; /* time at which to reap */
rwlock_t lock; /* access lock */
spinlock_t state_lock; /* state-change lock */
atomic_t usage;
u32 real_conn_id; /* connection ID (host-endian) */
enum { /* current state of connection */
RXRPC_CONN_UNUSED, /* - connection not yet attempted */
RXRPC_CONN_CLIENT, /* - client connection */
RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */
RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */
RXRPC_CONN_SERVER, /* - server 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 */
} state;
int error; /* error code for local abort */
int debug_id; /* debug ID for printks */
unsigned call_counter; /* call ID counter */
atomic_t serial; /* packet serial number counter */
atomic_t hi_serial; /* highest serial number received */
u8 avail_calls; /* number of calls available */
u8 size_align; /* data size alignment (for security) */
u8 header_size; /* rxrpc + security header size */
u8 security_size; /* security header size */
u32 security_level; /* security level negotiated */
u32 security_nonce; /* response re-use preventer */
/* the following are all in net order */
__be32 epoch; /* epoch of this connection */
__be32 cid; /* connection ID */
__be16 service_id; /* service ID */
u8 security_ix; /* security type */
u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */
u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
};
/*
* RxRPC call definition
* - matched by { connection, call_id }
*/
struct rxrpc_call {
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 list_head 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 rb_node conn_node; /* node in connection 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 */
unsigned long user_call_ID; /* user-defined call ID */
unsigned long creation_jif; /* time of call creation */
unsigned long flags;
#define RXRPC_CALL_RELEASED 0 /* call has been released - no more message to userspace */
#define RXRPC_CALL_TERMINAL_MSG 1 /* call has given the socket its final message */
#define RXRPC_CALL_RCVD_LAST 2 /* all packets received */
#define RXRPC_CALL_RUN_RTIMER 3 /* Tx resend timer started */
#define RXRPC_CALL_TX_SOFT_ACK 4 /* sent some soft ACKs */
#define RXRPC_CALL_PROC_BUSY 5 /* the processor is busy */
#define RXRPC_CALL_INIT_ACCEPT 6 /* acceptance was initiated */
#define RXRPC_CALL_HAS_USERID 7 /* has a user ID attached */
#define RXRPC_CALL_EXPECT_OOS 8 /* expect out of sequence packets */
unsigned long events;
#define RXRPC_CALL_RCVD_ACKALL 0 /* ACKALL or reply received */
#define RXRPC_CALL_RCVD_BUSY 1 /* busy packet received */
#define RXRPC_CALL_RCVD_ABORT 2 /* abort packet received */
#define RXRPC_CALL_RCVD_ERROR 3 /* network error received */
#define RXRPC_CALL_ACK_FINAL 4 /* need to generate final ACK (and release call) */
#define RXRPC_CALL_ACK 5 /* need to generate ACK */
#define RXRPC_CALL_REJECT_BUSY 6 /* need to generate busy message */
#define RXRPC_CALL_ABORT 7 /* need to generate abort */
#define RXRPC_CALL_CONN_ABORT 8 /* local connection abort generated */
#define RXRPC_CALL_RESEND_TIMER 9 /* Tx resend timer expired */
#define RXRPC_CALL_RESEND 10 /* Tx resend required */
#define RXRPC_CALL_DRAIN_RX_OOS 11 /* drain the Rx out of sequence queue */
#define RXRPC_CALL_LIFE_TIMER 12 /* call's lifetimer ran out */
#define RXRPC_CALL_ACCEPTED 13 /* incoming call accepted by userspace app */
#define RXRPC_CALL_SECURED 14 /* incoming call's connection is now secure */
#define RXRPC_CALL_POST_ACCEPT 15 /* need to post an "accept?" message to the app */
#define RXRPC_CALL_RELEASE 16 /* need to release the call's resources */
spinlock_t lock;
rwlock_t state_lock; /* lock for state transition */
atomic_t usage;
atomic_t sequence; /* Tx data packet sequence counter */
u32 abort_code; /* local/remote abort code */
enum { /* current state of call */
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 */
} state;
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_net_t ackr_prev_seq; /* previous sequence number received */
u8 ackr_reason; /* reason to ACK */
__be32 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];
/* the following should all be in net order */
__be32 cid; /* connection ID + channel index */
__be32 call_id; /* call ID on connection */
};
/*
* 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 *, u8, __be32, bool);
extern void rxrpc_propose_ACK(struct rxrpc_call *, u8, __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 *const rxrpc_call_states[];
extern const struct file_operations rxrpc_call_seq_fops;
extern const 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("[%-6.6s] "FMT"\n", 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")",__func__ ,##__VA_ARGS__)
#define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__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")",__func__ ,##__VA_ARGS__)
#define _leave(FMT,...) _dbprintk("<== %s()"FMT"",__func__ ,##__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)