diff options
Diffstat (limited to 'net/rxrpc/ar-internal.h')
| -rw-r--r-- | net/rxrpc/ar-internal.h | 842 |
1 files changed, 842 insertions, 0 deletions
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h new file mode 100644 index 000000000000..7bfbf471c81e --- /dev/null +++ b/net/rxrpc/ar-internal.h @@ -0,0 +1,842 @@ +/* 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 + +extern atomic_t rxrpc_n_skbs; + +#define FCRYPT_BSIZE 8 +struct rxrpc_crypt { + union { + u8 x[FCRYPT_BSIZE]; + u32 n[2]; + }; +} __attribute__((aligned(8))); + +extern __be32 rxrpc_epoch; /* local epoch for detecting local-end reset */ +extern atomic_t rxrpc_debug_id; /* current debugging ID */ + +/* + * 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; + 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_SKB_MARK_DATA, /* data message */ + RXRPC_SKB_MARK_FINAL_ACK, /* final ACK received message */ + RXRPC_SKB_MARK_BUSY, /* server busy message */ + RXRPC_SKB_MARK_REMOTE_ABORT, /* remote abort message */ + RXRPC_SKB_MARK_NET_ERROR, /* network error message */ + RXRPC_SKB_MARK_LOCAL_ERROR, /* local error message */ + RXRPC_SKB_MARK_NEW_CALL, /* local error message */ +}; + +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 */ + uint8_t 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 */ + uint8_t acks_head; /* offset into window of first entry */ + uint8_t acks_tail; /* offset into window of last entry */ + uint8_t acks_winsz; /* size of un-ACK'd window */ + uint8_t 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 */ + uint8_t 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 */ +}; + +/* + * RxRPC key for Kerberos (type-2 security) + */ +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); +} + +/* + * put a packet up for transport-level abort + */ +static inline +void rxrpc_reject_packet(struct rxrpc_local *local, struct sk_buff *skb) +{ + CHECK_SLAB_OKAY(&local->usage); + if (!atomic_inc_not_zero(&local->usage)) { + printk("resurrected on reject\n"); + BUG(); + } + skb_queue_tail(&local->reject_queue, skb); + schedule_work(&local->rejecter); +} + +/* + * ar-accept.c + */ +extern void rxrpc_accept_incoming_calls(struct work_struct *); +extern int rxrpc_accept_call(struct rxrpc_sock *, unsigned long); + +/* + * 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_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 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__atomic_inc(atomic_t *v) +{ + CHECK_SLAB_OKAY(v); + atomic_inc(v); +} + +#define atomic_inc(v) __rxrpc__atomic_inc((v)) + +static inline void __rxrpc__atomic_dec(atomic_t *v) +{ + CHECK_SLAB_OKAY(v); + atomic_dec(v); +} + +#define atomic_dec(v) __rxrpc__atomic_dec((v)) + +static inline int __rxrpc__atomic_dec_and_test(atomic_t *v) +{ + CHECK_SLAB_OKAY(v); + return atomic_dec_and_test(v); +} + +#define atomic_dec_and_test(v) __rxrpc__atomic_dec_and_test((v)) + +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) |
