net/rxrpc/ar-internal.h

   1 /* AF_RXRPC internal definitions
   2  *
   3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/atomic.h>
  13 #include <linux/seqlock.h>
  14 #include <net/sock.h>
  15 #include <net/af_rxrpc.h>
  16 #include <rxrpc/packet.h>
  17
  18 #if 0
  19 #define CHECK_SLAB_OKAY(X)                                   \
  20         BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \
  21                (POISON_FREE << 8 | POISON_FREE))
  22 #else
  23 #define CHECK_SLAB_OKAY(X) do {} while (0)
  24 #endif
  25
  26 #define FCRYPT_BSIZE 8
  27 struct rxrpc_crypt {
  28         union {
  29                 u8      x[FCRYPT_BSIZE];
  30                 __be32  n[2];
  31         };
  32 } __attribute__((aligned(8)));
  33
  34 #define rxrpc_queue_work(WS)    queue_work(rxrpc_workqueue, (WS))
  35 #define rxrpc_queue_delayed_work(WS,D)  \
  36         queue_delayed_work(rxrpc_workqueue, (WS), (D))
  37
  38 struct rxrpc_connection;
  39
  40 /*
  41  * Mark applied to socket buffers.
  42  */
  43 enum rxrpc_skb_mark {
  44         RXRPC_SKB_MARK_DATA,            /* data message */
  45         RXRPC_SKB_MARK_FINAL_ACK,       /* final ACK received message */
  46         RXRPC_SKB_MARK_BUSY,            /* server busy message */
  47         RXRPC_SKB_MARK_REMOTE_ABORT,    /* remote abort message */
  48         RXRPC_SKB_MARK_LOCAL_ABORT,     /* local abort message */
  49         RXRPC_SKB_MARK_NET_ERROR,       /* network error message */
  50         RXRPC_SKB_MARK_LOCAL_ERROR,     /* local error message */
  51         RXRPC_SKB_MARK_NEW_CALL,        /* local error message */
  52 };
  53
  54 /*
  55  * sk_state for RxRPC sockets
  56  */
  57 enum {
  58         RXRPC_UNBOUND = 0,
  59         RXRPC_CLIENT_UNBOUND,           /* Unbound socket used as client */
  60         RXRPC_CLIENT_BOUND,             /* client local address bound */
  61         RXRPC_SERVER_BOUND,             /* server local address bound */
  62         RXRPC_SERVER_LISTENING,         /* server listening for connections */
  63         RXRPC_CLOSE,                    /* socket is being closed */
  64 };
  65
  66 /*
  67  * Service backlog preallocation.
  68  *
  69  * This contains circular buffers of preallocated peers, connections and calls
  70  * for incoming service calls and their head and tail pointers.  This allows
  71  * calls to be set up in the data_ready handler, thereby avoiding the need to
  72  * shuffle packets around so much.
  73  */
  74 struct rxrpc_backlog {
  75         unsigned short          peer_backlog_head;
  76         unsigned short          peer_backlog_tail;
  77         unsigned short          conn_backlog_head;
  78         unsigned short          conn_backlog_tail;
  79         unsigned short          call_backlog_head;
  80         unsigned short          call_backlog_tail;
  81 #define RXRPC_BACKLOG_MAX       32
  82         struct rxrpc_peer       *peer_backlog[RXRPC_BACKLOG_MAX];
  83         struct rxrpc_connection *conn_backlog[RXRPC_BACKLOG_MAX];
  84         struct rxrpc_call       *call_backlog[RXRPC_BACKLOG_MAX];
  85 };
  86
  87 /*
  88  * RxRPC socket definition
  89  */
  90 struct rxrpc_sock {
  91         /* WARNING: sk has to be the first member */
  92         struct sock             sk;
  93         rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */
  94         rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */
  95         struct rxrpc_local      *local;         /* local endpoint */
  96         struct hlist_node       listen_link;    /* link in the local endpoint's listen list */
  97         struct rxrpc_backlog    *backlog;       /* Preallocation for services */
  98         spinlock_t              incoming_lock;  /* Incoming call vs service shutdown lock */
  99         struct list_head        sock_calls;     /* List of calls owned by this socket */
 100         struct list_head        to_be_accepted; /* calls awaiting acceptance */
 101         struct list_head        recvmsg_q;      /* Calls awaiting recvmsg's attention  */
 102         rwlock_t                recvmsg_lock;   /* Lock for recvmsg_q */
 103         struct key              *key;           /* security for this socket */
 104         struct key              *securities;    /* list of server security descriptors */
 105         struct rb_root          calls;          /* User ID -> call mapping */
 106         unsigned long           flags;
 107 #define RXRPC_SOCK_CONNECTED            0       /* connect_srx is set */
 108         rwlock_t                call_lock;      /* lock for calls */
 109         u32                     min_sec_level;  /* minimum security level */
 110 #define RXRPC_SECURITY_MAX      RXRPC_SECURITY_ENCRYPT
 111         bool                    exclusive;      /* Exclusive connection for a client socket */
 112         sa_family_t             family;         /* Protocol family created with */
 113         struct sockaddr_rxrpc   srx;            /* local address */
 114         struct sockaddr_rxrpc   connect_srx;    /* Default client address from connect() */
 115 };
 116
 117 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
 118
 119 /*
 120  * CPU-byteorder normalised Rx packet header.
 121  */
 122 struct rxrpc_host_header {
 123         u32             epoch;          /* client boot timestamp */
 124         u32             cid;            /* connection and channel ID */
 125         u32             callNumber;     /* call ID (0 for connection-level packets) */
 126         u32             seq;            /* sequence number of pkt in call stream */
 127         u32             serial;         /* serial number of pkt sent to network */
 128         u8              type;           /* packet type */
 129         u8              flags;          /* packet flags */
 130         u8              userStatus;     /* app-layer defined status */
 131         u8              securityIndex;  /* security protocol ID */
 132         union {
 133                 u16     _rsvd;          /* reserved */
 134                 u16     cksum;          /* kerberos security checksum */
 135         };
 136         u16             serviceId;      /* service ID */
 137 } __packed;
 138
 139 /*
 140  * RxRPC socket buffer private variables
 141  * - max 48 bytes (struct sk_buff::cb)
 142  */
 143 struct rxrpc_skb_priv {
 144         union {
 145                 unsigned long   resend_at;      /* time in jiffies at which to resend */
 146                 struct {
 147                         u8      nr_jumbo;       /* Number of jumbo subpackets */
 148                 };
 149         };
 150         union {
 151                 unsigned int    offset;         /* offset into buffer of next read */
 152                 int             remain;         /* amount of space remaining for next write */
 153                 u32             error;          /* network error code */
 154         };
 155
 156         struct rxrpc_host_header hdr;           /* RxRPC packet header from this packet */
 157 };
 158
 159 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
 160
 161 /*
 162  * RxRPC security module interface
 163  */
 164 struct rxrpc_security {
 165         const char              *name;          /* name of this service */
 166         u8                      security_index; /* security type provided */
 167
 168         /* Initialise a security service */
 169         int (*init)(void);
 170
 171         /* Clean up a security service */
 172         void (*exit)(void);
 173
 174         /* initialise a connection's security */
 175         int (*init_connection_security)(struct rxrpc_connection *);
 176
 177         /* prime a connection's packet security */
 178         int (*prime_packet_security)(struct rxrpc_connection *);
 179
 180         /* impose security on a packet */
 181         int (*secure_packet)(struct rxrpc_call *,
 182                              struct sk_buff *,
 183                              size_t,
 184                              void *);
 185
 186         /* verify the security on a received packet */
 187         int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
 188                              unsigned int, unsigned int, rxrpc_seq_t, u16);
 189
 190         /* Locate the data in a received packet that has been verified. */
 191         void (*locate_data)(struct rxrpc_call *, struct sk_buff *,
 192                             unsigned int *, unsigned int *);
 193
 194         /* issue a challenge */
 195         int (*issue_challenge)(struct rxrpc_connection *);
 196
 197         /* respond to a challenge */
 198         int (*respond_to_challenge)(struct rxrpc_connection *,
 199                                     struct sk_buff *,
 200                                     u32 *);
 201
 202         /* verify a response */
 203         int (*verify_response)(struct rxrpc_connection *,
 204                                struct sk_buff *,
 205                                u32 *);
 206
 207         /* clear connection security */
 208         void (*clear)(struct rxrpc_connection *);
 209 };
 210
 211 /*
 212  * RxRPC local transport endpoint description
 213  * - owned by a single AF_RXRPC socket
 214  * - pointed to by transport socket struct sk_user_data
 215  */
 216 struct rxrpc_local {
 217         struct rcu_head         rcu;
 218         atomic_t                usage;
 219         struct list_head        link;
 220         struct socket           *socket;        /* my UDP socket */
 221         struct work_struct      processor;
 222         struct hlist_head       services;       /* services listening on this endpoint */
 223         struct rw_semaphore     defrag_sem;     /* control re-enablement of IP DF bit */
 224         struct sk_buff_head     reject_queue;   /* packets awaiting rejection */
 225         struct sk_buff_head     event_queue;    /* endpoint event packets awaiting processing */
 226         struct rb_root          client_conns;   /* Client connections by socket params */
 227         spinlock_t              client_conns_lock; /* Lock for client_conns */
 228         spinlock_t              lock;           /* access lock */
 229         rwlock_t                services_lock;  /* lock for services list */
 230         int                     debug_id;       /* debug ID for printks */
 231         bool                    dead;
 232         struct sockaddr_rxrpc   srx;            /* local address */
 233 };
 234
 235 /*
 236  * RxRPC remote transport endpoint definition
 237  * - matched by local endpoint, remote port, address and protocol type
 238  */
 239 struct rxrpc_peer {
 240         struct rcu_head         rcu;            /* This must be first */
 241         atomic_t                usage;
 242         unsigned long           hash_key;
 243         struct hlist_node       hash_link;
 244         struct rxrpc_local      *local;
 245         struct hlist_head       error_targets;  /* targets for net error distribution */
 246         struct work_struct      error_distributor;
 247         struct rb_root          service_conns;  /* Service connections */
 248         seqlock_t               service_conn_lock;
 249         spinlock_t              lock;           /* access lock */
 250         unsigned int            if_mtu;         /* interface MTU for this peer */
 251         unsigned int            mtu;            /* network MTU for this peer */
 252         unsigned int            maxdata;        /* data size (MTU - hdrsize) */
 253         unsigned short          hdrsize;        /* header size (IP + UDP + RxRPC) */
 254         int                     debug_id;       /* debug ID for printks */
 255         int                     error_report;   /* Net (+0) or local (+1000000) to distribute */
 256 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
 257         struct sockaddr_rxrpc   srx;            /* remote address */
 258
 259         /* calculated RTT cache */
 260 #define RXRPC_RTT_CACHE_SIZE 32
 261         suseconds_t             rtt;            /* current RTT estimate (in uS) */
 262         unsigned int            rtt_point;      /* next entry at which to insert */
 263         unsigned int            rtt_usage;      /* amount of cache actually used */
 264         suseconds_t             rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
 265 };
 266
 267 /*
 268  * Keys for matching a connection.
 269  */
 270 struct rxrpc_conn_proto {
 271         union {
 272                 struct {
 273                         u32     epoch;          /* epoch of this connection */
 274                         u32     cid;            /* connection ID */
 275                 };
 276                 u64             index_key;
 277         };
 278 };
 279
 280 struct rxrpc_conn_parameters {
 281         struct rxrpc_local      *local;         /* Representation of local endpoint */
 282         struct rxrpc_peer       *peer;          /* Remote endpoint */
 283         struct key              *key;           /* Security details */
 284         bool                    exclusive;      /* T if conn is exclusive */
 285         u16                     service_id;     /* Service ID for this connection */
 286         u32                     security_level; /* Security level selected */
 287 };
 288
 289 /*
 290  * Bits in the connection flags.
 291  */
 292 enum rxrpc_conn_flag {
 293         RXRPC_CONN_HAS_IDR,             /* Has a client conn ID assigned */
 294         RXRPC_CONN_IN_SERVICE_CONNS,    /* Conn is in peer->service_conns */
 295         RXRPC_CONN_IN_CLIENT_CONNS,     /* Conn is in local->client_conns */
 296         RXRPC_CONN_EXPOSED,             /* Conn has extra ref for exposure */
 297         RXRPC_CONN_DONT_REUSE,          /* Don't reuse this connection */
 298         RXRPC_CONN_COUNTED,             /* Counted by rxrpc_nr_client_conns */
 299 };
 300
 301 /*
 302  * Events that can be raised upon a connection.
 303  */
 304 enum rxrpc_conn_event {
 305         RXRPC_CONN_EV_CHALLENGE,        /* Send challenge packet */
 306 };
 307
 308 /*
 309  * The connection cache state.
 310  */
 311 enum rxrpc_conn_cache_state {
 312         RXRPC_CONN_CLIENT_INACTIVE,     /* Conn is not yet listed */
 313         RXRPC_CONN_CLIENT_WAITING,      /* Conn is on wait list, waiting for capacity */
 314         RXRPC_CONN_CLIENT_ACTIVE,       /* Conn is on active list, doing calls */
 315         RXRPC_CONN_CLIENT_CULLED,       /* Conn is culled and delisted, doing calls */
 316         RXRPC_CONN_CLIENT_IDLE,         /* Conn is on idle list, doing mostly nothing */
 317         RXRPC_CONN__NR_CACHE_STATES
 318 };
 319
 320 /*
 321  * The connection protocol state.
 322  */
 323 enum rxrpc_conn_proto_state {
 324         RXRPC_CONN_UNUSED,              /* Connection not yet attempted */
 325         RXRPC_CONN_CLIENT,              /* Client connection */
 326         RXRPC_CONN_SERVICE_PREALLOC,    /* Service connection preallocation */
 327         RXRPC_CONN_SERVICE_UNSECURED,   /* Service unsecured connection */
 328         RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
 329         RXRPC_CONN_SERVICE,             /* Service secured connection */
 330         RXRPC_CONN_REMOTELY_ABORTED,    /* Conn aborted by peer */
 331         RXRPC_CONN_LOCALLY_ABORTED,     /* Conn aborted locally */
 332         RXRPC_CONN__NR_STATES
 333 };
 334
 335 /*
 336  * RxRPC connection definition
 337  * - matched by { local, peer, epoch, conn_id, direction }
 338  * - each connection can only handle four simultaneous calls
 339  */
 340 struct rxrpc_connection {
 341         struct rxrpc_conn_proto proto;
 342         struct rxrpc_conn_parameters params;
 343
 344         atomic_t                usage;
 345         struct rcu_head         rcu;
 346         struct list_head        cache_link;
 347
 348         spinlock_t              channel_lock;
 349         unsigned char           active_chans;   /* Mask of active channels */
 350 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
 351         struct list_head        waiting_calls;  /* Calls waiting for channels */
 352         struct rxrpc_channel {
 353                 struct rxrpc_call __rcu *call;          /* Active call */
 354                 u32                     call_id;        /* ID of current call */
 355                 u32                     call_counter;   /* Call ID counter */
 356                 u32                     last_call;      /* ID of last call */
 357                 u8                      last_type;      /* Type of last packet */
 358                 u16                     last_service_id;
 359                 union {
 360                         u32             last_seq;
 361                         u32             last_abort;
 362                 };
 363         } channels[RXRPC_MAXCALLS];
 364
 365         struct work_struct      processor;      /* connection event processor */
 366         union {
 367                 struct rb_node  client_node;    /* Node in local->client_conns */
 368                 struct rb_node  service_node;   /* Node in peer->service_conns */
 369         };
 370         struct list_head        proc_link;      /* link in procfs list */
 371         struct list_head        link;           /* link in master connection list */
 372         struct sk_buff_head     rx_queue;       /* received conn-level packets */
 373         const struct rxrpc_security *security;  /* applied security module */
 374         struct key              *server_key;    /* security for this service */
 375         struct crypto_skcipher  *cipher;        /* encryption handle */
 376         struct rxrpc_crypt      csum_iv;        /* packet checksum base */
 377         unsigned long           flags;
 378         unsigned long           events;
 379         unsigned long           idle_timestamp; /* Time at which last became idle */
 380         spinlock_t              state_lock;     /* state-change lock */
 381         enum rxrpc_conn_cache_state cache_state;
 382         enum rxrpc_conn_proto_state state;      /* current state of connection */
 383         u32                     local_abort;    /* local abort code */
 384         u32                     remote_abort;   /* remote abort code */
 385         int                     debug_id;       /* debug ID for printks */
 386         atomic_t                serial;         /* packet serial number counter */
 387         unsigned int            hi_serial;      /* highest serial number received */
 388         u8                      size_align;     /* data size alignment (for security) */
 389         u8                      header_size;    /* rxrpc + security header size */
 390         u8                      security_size;  /* security header size */
 391         u32                     security_nonce; /* response re-use preventer */
 392         u8                      security_ix;    /* security type */
 393         u8                      out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
 394 };
 395
 396 /*
 397  * Flags in call->flags.
 398  */
 399 enum rxrpc_call_flag {
 400         RXRPC_CALL_RELEASED,            /* call has been released - no more message to userspace */
 401         RXRPC_CALL_HAS_USERID,          /* has a user ID attached */
 402         RXRPC_CALL_IS_SERVICE,          /* Call is service call */
 403         RXRPC_CALL_EXPOSED,             /* The call was exposed to the world */
 404         RXRPC_CALL_RX_LAST,             /* Received the last packet (at rxtx_top) */
 405         RXRPC_CALL_TX_LAST,             /* Last packet in Tx buffer (at rxtx_top) */
 406 };
 407
 408 /*
 409  * Events that can be raised on a call.
 410  */
 411 enum rxrpc_call_event {
 412         RXRPC_CALL_EV_ACK,              /* need to generate ACK */
 413         RXRPC_CALL_EV_ABORT,            /* need to generate abort */
 414         RXRPC_CALL_EV_TIMER,            /* Timer expired */
 415         RXRPC_CALL_EV_RESEND,           /* Tx resend required */
 416 };
 417
 418 /*
 419  * The states that a call can be in.
 420  */
 421 enum rxrpc_call_state {
 422         RXRPC_CALL_UNINITIALISED,
 423         RXRPC_CALL_CLIENT_AWAIT_CONN,   /* - client waiting for connection to become available */
 424         RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
 425         RXRPC_CALL_CLIENT_AWAIT_REPLY,  /* - client awaiting reply */
 426         RXRPC_CALL_CLIENT_RECV_REPLY,   /* - client receiving reply phase */
 427         RXRPC_CALL_SERVER_PREALLOC,     /* - service preallocation */
 428         RXRPC_CALL_SERVER_SECURING,     /* - server securing request connection */
 429         RXRPC_CALL_SERVER_ACCEPTING,    /* - server accepting request */
 430         RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
 431         RXRPC_CALL_SERVER_ACK_REQUEST,  /* - server pending ACK of request */
 432         RXRPC_CALL_SERVER_SEND_REPLY,   /* - server sending reply */
 433         RXRPC_CALL_SERVER_AWAIT_ACK,    /* - server awaiting final ACK */
 434         RXRPC_CALL_COMPLETE,            /* - call complete */
 435         NR__RXRPC_CALL_STATES
 436 };
 437
 438 /*
 439  * Call completion condition (state == RXRPC_CALL_COMPLETE).
 440  */
 441 enum rxrpc_call_completion {
 442         RXRPC_CALL_SUCCEEDED,           /* - Normal termination */
 443         RXRPC_CALL_REMOTELY_ABORTED,    /* - call aborted by peer */
 444         RXRPC_CALL_LOCALLY_ABORTED,     /* - call aborted locally on error or close */
 445         RXRPC_CALL_LOCAL_ERROR,         /* - call failed due to local error */
 446         RXRPC_CALL_NETWORK_ERROR,       /* - call terminated by network error */
 447         NR__RXRPC_CALL_COMPLETIONS
 448 };
 449
 450 /*
 451  * RxRPC call definition
 452  * - matched by { connection, call_id }
 453  */
 454 struct rxrpc_call {
 455         struct rcu_head         rcu;
 456         struct rxrpc_connection *conn;          /* connection carrying call */
 457         struct rxrpc_peer       *peer;          /* Peer record for remote address */
 458         struct rxrpc_sock __rcu *socket;        /* socket responsible */
 459         unsigned long           ack_at;         /* When deferred ACK needs to happen */
 460         unsigned long           resend_at;      /* When next resend needs to happen */
 461         unsigned long           expire_at;      /* When the call times out */
 462         struct timer_list       timer;          /* Combined event timer */
 463         struct work_struct      processor;      /* Event processor */
 464         rxrpc_notify_rx_t       notify_rx;      /* kernel service Rx notification function */
 465         struct list_head        link;           /* link in master call list */
 466         struct list_head        chan_wait_link; /* Link in conn->waiting_calls */
 467         struct hlist_node       error_link;     /* link in error distribution list */
 468         struct list_head        accept_link;    /* Link in rx->acceptq */
 469         struct list_head        recvmsg_link;   /* Link in rx->recvmsg_q */
 470         struct list_head        sock_link;      /* Link in rx->sock_calls */
 471         struct rb_node          sock_node;      /* Node in rx->calls */
 472         struct sk_buff          *tx_pending;    /* Tx socket buffer being filled */
 473         wait_queue_head_t       waitq;          /* Wait queue for channel or Tx */
 474         __be32                  crypto_buf[2];  /* Temporary packet crypto buffer */
 475         unsigned long           user_call_ID;   /* user-defined call ID */
 476         unsigned long           flags;
 477         unsigned long           events;
 478         spinlock_t              lock;
 479         rwlock_t                state_lock;     /* lock for state transition */
 480         u32                     abort_code;     /* Local/remote abort code */
 481         int                     error;          /* Local error incurred */
 482         enum rxrpc_call_state   state;          /* current state of call */
 483         enum rxrpc_call_completion completion;  /* Call completion condition */
 484         atomic_t                usage;
 485         u16                     service_id;     /* service ID */
 486         u8                      security_ix;    /* Security type */
 487         u32                     call_id;        /* call ID on connection  */
 488         u32                     cid;            /* connection ID plus channel index */
 489         int                     debug_id;       /* debug ID for printks */
 490
 491         /* Rx/Tx circular buffer, depending on phase.
 492          *
 493          * In the Rx phase, packets are annotated with 0 or the number of the
 494          * segment of a jumbo packet each buffer refers to.  There can be up to
 495          * 47 segments in a maximum-size UDP packet.
 496          *
 497          * In the Tx phase, packets are annotated with which buffers have been
 498          * acked.
 499          */
 500 #define RXRPC_RXTX_BUFF_SIZE    64
 501 #define RXRPC_RXTX_BUFF_MASK    (RXRPC_RXTX_BUFF_SIZE - 1)
 502 #define RXRPC_INIT_RX_WINDOW_SIZE 32
 503         struct sk_buff          **rxtx_buffer;
 504         u8                      *rxtx_annotations;
 505 #define RXRPC_TX_ANNO_ACK       0
 506 #define RXRPC_TX_ANNO_UNACK     1
 507 #define RXRPC_TX_ANNO_NAK       2
 508 #define RXRPC_TX_ANNO_RETRANS   3
 509 #define RXRPC_RX_ANNO_JUMBO     0x3f            /* Jumbo subpacket number + 1 if not zero */
 510 #define RXRPC_RX_ANNO_JLAST     0x40            /* Set if last element of a jumbo packet */
 511 #define RXRPC_RX_ANNO_VERIFIED  0x80            /* Set if verified and decrypted */
 512         rxrpc_seq_t             tx_hard_ack;    /* Dead slot in buffer; the first transmitted but
 513                                                  * not hard-ACK'd packet follows this.
 514                                                  */
 515         rxrpc_seq_t             tx_top;         /* Highest Tx slot allocated. */
 516         rxrpc_seq_t             rx_hard_ack;    /* Dead slot in buffer; the first received but not
 517                                                  * consumed packet follows this.
 518                                                  */
 519         rxrpc_seq_t             rx_top;         /* Highest Rx slot allocated. */
 520         rxrpc_seq_t             rx_expect_next; /* Expected next packet sequence number */
 521         u8                      rx_winsize;     /* Size of Rx window */
 522         u8                      tx_winsize;     /* Maximum size of Tx window */
 523         bool                    tx_phase;       /* T if transmission phase, F if receive phase */
 524         u8                      nr_jumbo_bad;   /* Number of jumbo dups/exceeds-windows */
 525
 526         /* receive-phase ACK management */
 527         u8                      ackr_reason;    /* reason to ACK */
 528         u16                     ackr_skew;      /* skew on packet being ACK'd */
 529         rxrpc_serial_t          ackr_serial;    /* serial of packet being ACK'd */
 530         rxrpc_seq_t             ackr_prev_seq;  /* previous sequence number received */
 531         unsigned short          rx_pkt_offset;  /* Current recvmsg packet offset */
 532         unsigned short          rx_pkt_len;     /* Current recvmsg packet len */
 533
 534         /* transmission-phase ACK management */
 535         rxrpc_serial_t          acks_latest;    /* serial number of latest ACK received */
 536 };
 537
 538 enum rxrpc_skb_trace {
 539         rxrpc_skb_rx_cleaned,
 540         rxrpc_skb_rx_freed,
 541         rxrpc_skb_rx_got,
 542         rxrpc_skb_rx_lost,
 543         rxrpc_skb_rx_received,
 544         rxrpc_skb_rx_rotated,
 545         rxrpc_skb_rx_purged,
 546         rxrpc_skb_rx_seen,
 547         rxrpc_skb_tx_cleaned,
 548         rxrpc_skb_tx_freed,
 549         rxrpc_skb_tx_got,
 550         rxrpc_skb_tx_lost,
 551         rxrpc_skb_tx_new,
 552         rxrpc_skb_tx_rotated,
 553         rxrpc_skb_tx_seen,
 554         rxrpc_skb__nr_trace
 555 };
 556
 557 extern const char rxrpc_skb_traces[rxrpc_skb__nr_trace][7];
 558
 559 enum rxrpc_conn_trace {
 560         rxrpc_conn_new_client,
 561         rxrpc_conn_new_service,
 562         rxrpc_conn_queued,
 563         rxrpc_conn_seen,
 564         rxrpc_conn_got,
 565         rxrpc_conn_put_client,
 566         rxrpc_conn_put_service,
 567         rxrpc_conn__nr_trace
 568 };
 569
 570 extern const char rxrpc_conn_traces[rxrpc_conn__nr_trace][4];
 571
 572 enum rxrpc_client_trace {
 573         rxrpc_client_activate_chans,
 574         rxrpc_client_alloc,
 575         rxrpc_client_chan_activate,
 576         rxrpc_client_chan_disconnect,
 577         rxrpc_client_chan_pass,
 578         rxrpc_client_chan_unstarted,
 579         rxrpc_client_cleanup,
 580         rxrpc_client_count,
 581         rxrpc_client_discard,
 582         rxrpc_client_duplicate,
 583         rxrpc_client_exposed,
 584         rxrpc_client_replace,
 585         rxrpc_client_to_active,
 586         rxrpc_client_to_culled,
 587         rxrpc_client_to_idle,
 588         rxrpc_client_to_inactive,
 589         rxrpc_client_to_waiting,
 590         rxrpc_client_uncount,
 591         rxrpc_client__nr_trace
 592 };
 593
 594 extern const char rxrpc_client_traces[rxrpc_client__nr_trace][7];
 595 extern const char rxrpc_conn_cache_states[RXRPC_CONN__NR_CACHE_STATES][5];
 596
 597 enum rxrpc_call_trace {
 598         rxrpc_call_new_client,
 599         rxrpc_call_new_service,
 600         rxrpc_call_queued,
 601         rxrpc_call_queued_ref,
 602         rxrpc_call_seen,
 603         rxrpc_call_connected,
 604         rxrpc_call_release,
 605         rxrpc_call_got,
 606         rxrpc_call_got_userid,
 607         rxrpc_call_got_kernel,
 608         rxrpc_call_put,
 609         rxrpc_call_put_userid,
 610         rxrpc_call_put_kernel,
 611         rxrpc_call_put_noqueue,
 612         rxrpc_call_error,
 613         rxrpc_call__nr_trace
 614 };
 615
 616 extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
 617
 618 enum rxrpc_transmit_trace {
 619         rxrpc_transmit_wait,
 620         rxrpc_transmit_queue,
 621         rxrpc_transmit_queue_reqack,
 622         rxrpc_transmit_queue_last,
 623         rxrpc_transmit_rotate,
 624         rxrpc_transmit_end,
 625         rxrpc_transmit__nr_trace
 626 };
 627
 628 extern const char rxrpc_transmit_traces[rxrpc_transmit__nr_trace][4];
 629
 630 enum rxrpc_receive_trace {
 631         rxrpc_receive_incoming,
 632         rxrpc_receive_queue,
 633         rxrpc_receive_queue_last,
 634         rxrpc_receive_front,
 635         rxrpc_receive_rotate,
 636         rxrpc_receive_end,
 637         rxrpc_receive__nr_trace
 638 };
 639
 640 extern const char rxrpc_receive_traces[rxrpc_receive__nr_trace][4];
 641
 642 enum rxrpc_recvmsg_trace {
 643         rxrpc_recvmsg_enter,
 644         rxrpc_recvmsg_wait,
 645         rxrpc_recvmsg_dequeue,
 646         rxrpc_recvmsg_hole,
 647         rxrpc_recvmsg_next,
 648         rxrpc_recvmsg_cont,
 649         rxrpc_recvmsg_full,
 650         rxrpc_recvmsg_data_return,
 651         rxrpc_recvmsg_terminal,
 652         rxrpc_recvmsg_to_be_accepted,
 653         rxrpc_recvmsg_return,
 654         rxrpc_recvmsg__nr_trace
 655 };
 656
 657 extern const char rxrpc_recvmsg_traces[rxrpc_recvmsg__nr_trace][5];
 658
 659 extern const char *const rxrpc_pkts[];
 660 extern const char *rxrpc_acks(u8 reason);
 661
 662 #include <trace/events/rxrpc.h>
 663
 664 /*
 665  * af_rxrpc.c
 666  */
 667 extern atomic_t rxrpc_n_tx_skbs, rxrpc_n_rx_skbs;
 668 extern u32 rxrpc_epoch;
 669 extern atomic_t rxrpc_debug_id;
 670 extern struct workqueue_struct *rxrpc_workqueue;
 671
 672 /*
 673  * call_accept.c
 674  */
 675 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
 676 void rxrpc_discard_prealloc(struct rxrpc_sock *);
 677 struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *,
 678                                            struct rxrpc_connection *,
 679                                            struct sk_buff *);
 680 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
 681 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
 682                                      rxrpc_notify_rx_t);
 683 int rxrpc_reject_call(struct rxrpc_sock *);
 684
 685 /*
 686  * call_event.c
 687  */
 688 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool);
 689 void rxrpc_process_call(struct work_struct *);
 690
 691 /*
 692  * call_object.c
 693  */
 694 extern const char *const rxrpc_call_states[];
 695 extern const char *const rxrpc_call_completions[];
 696 extern unsigned int rxrpc_max_call_lifetime;
 697 extern struct kmem_cache *rxrpc_call_jar;
 698 extern struct list_head rxrpc_calls;
 699 extern rwlock_t rxrpc_call_lock;
 700
 701 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
 702 struct rxrpc_call *rxrpc_alloc_call(gfp_t);
 703 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
 704                                          struct rxrpc_conn_parameters *,
 705                                          struct sockaddr_rxrpc *,
 706                                          unsigned long, gfp_t);
 707 void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *,
 708                          struct sk_buff *);
 709 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
 710 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
 711 bool __rxrpc_queue_call(struct rxrpc_call *);
 712 bool rxrpc_queue_call(struct rxrpc_call *);
 713 void rxrpc_see_call(struct rxrpc_call *);
 714 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
 715 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
 716 void rxrpc_cleanup_call(struct rxrpc_call *);
 717 void __exit rxrpc_destroy_all_calls(void);
 718
 719 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
 720 {
 721         return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
 722 }
 723
 724 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
 725 {
 726         return !rxrpc_is_service_call(call);
 727 }
 728
 729 /*
 730  * Transition a call to the complete state.
 731  */
 732 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
 733                                                enum rxrpc_call_completion compl,
 734                                                u32 abort_code,
 735                                                int error)
 736 {
 737         if (call->state < RXRPC_CALL_COMPLETE) {
 738                 call->abort_code = abort_code;
 739                 call->error = error;
 740                 call->completion = compl,
 741                 call->state = RXRPC_CALL_COMPLETE;
 742                 return true;
 743         }
 744         return false;
 745 }
 746
 747 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
 748                                              enum rxrpc_call_completion compl,
 749                                              u32 abort_code,
 750                                              int error)
 751 {
 752         bool ret;
 753
 754         write_lock_bh(&call->state_lock);
 755         ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
 756         write_unlock_bh(&call->state_lock);
 757         return ret;
 758 }
 759
 760 /*
 761  * Record that a call successfully completed.
 762  */
 763 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
 764 {
 765         return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
 766 }
 767
 768 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
 769 {
 770         bool ret;
 771
 772         write_lock_bh(&call->state_lock);
 773         ret = __rxrpc_call_completed(call);
 774         write_unlock_bh(&call->state_lock);
 775         return ret;
 776 }
 777
 778 /*
 779  * Record that a call is locally aborted.
 780  */
 781 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
 782                                       rxrpc_seq_t seq,
 783                                       u32 abort_code, int error)
 784 {
 785         trace_rxrpc_abort(why, call->cid, call->call_id, seq,
 786                           abort_code, error);
 787         return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED,
 788                                            abort_code, error);
 789 }
 790
 791 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
 792                                     rxrpc_seq_t seq, u32 abort_code, int error)
 793 {
 794         bool ret;
 795
 796         write_lock_bh(&call->state_lock);
 797         ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
 798         write_unlock_bh(&call->state_lock);
 799         return ret;
 800 }
 801
 802 /*
 803  * conn_client.c
 804  */
 805 extern unsigned int rxrpc_max_client_connections;
 806 extern unsigned int rxrpc_reap_client_connections;
 807 extern unsigned int rxrpc_conn_idle_client_expiry;
 808 extern unsigned int rxrpc_conn_idle_client_fast_expiry;
 809 extern struct idr rxrpc_client_conn_ids;
 810
 811 void rxrpc_destroy_client_conn_ids(void);
 812 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
 813                        struct sockaddr_rxrpc *, gfp_t);
 814 void rxrpc_expose_client_call(struct rxrpc_call *);
 815 void rxrpc_disconnect_client_call(struct rxrpc_call *);
 816 void rxrpc_put_client_conn(struct rxrpc_connection *);
 817 void __exit rxrpc_destroy_all_client_connections(void);
 818
 819 /*
 820  * conn_event.c
 821  */
 822 void rxrpc_process_connection(struct work_struct *);
 823
 824 /*
 825  * conn_object.c
 826  */
 827 extern unsigned int rxrpc_connection_expiry;
 828 extern struct list_head rxrpc_connections;
 829 extern struct list_head rxrpc_connection_proc_list;
 830 extern rwlock_t rxrpc_connection_lock;
 831
 832 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
 833 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
 834 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
 835                                                    struct sk_buff *);
 836 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
 837 void rxrpc_disconnect_call(struct rxrpc_call *);
 838 void rxrpc_kill_connection(struct rxrpc_connection *);
 839 bool rxrpc_queue_conn(struct rxrpc_connection *);
 840 void rxrpc_see_connection(struct rxrpc_connection *);
 841 void rxrpc_get_connection(struct rxrpc_connection *);
 842 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *);
 843 void rxrpc_put_service_conn(struct rxrpc_connection *);
 844 void __exit rxrpc_destroy_all_connections(void);
 845
 846 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
 847 {
 848         return conn->out_clientflag;
 849 }
 850
 851 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
 852 {
 853         return !rxrpc_conn_is_client(conn);
 854 }
 855
 856 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
 857 {
 858         if (!conn)
 859                 return;
 860
 861         if (rxrpc_conn_is_client(conn))
 862                 rxrpc_put_client_conn(conn);
 863         else
 864                 rxrpc_put_service_conn(conn);
 865 }
 866
 867 /*
 868  * conn_service.c
 869  */
 870 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
 871                                                      struct sk_buff *);
 872 struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
 873 void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *);
 874 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
 875
 876 /*
 877  * input.c
 878  */
 879 void rxrpc_data_ready(struct sock *);
 880
 881 /*
 882  * insecure.c
 883  */
 884 extern const struct rxrpc_security rxrpc_no_security;
 885
 886 /*
 887  * key.c
 888  */
 889 extern struct key_type key_type_rxrpc;
 890 extern struct key_type key_type_rxrpc_s;
 891
 892 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
 893 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
 894 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
 895                               u32);
 896
 897 /*
 898  * local_event.c
 899  */
 900 extern void rxrpc_process_local_events(struct rxrpc_local *);
 901
 902 /*
 903  * local_object.c
 904  */
 905 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
 906 void __rxrpc_put_local(struct rxrpc_local *);
 907 void __exit rxrpc_destroy_all_locals(void);
 908
 909 static inline void rxrpc_get_local(struct rxrpc_local *local)
 910 {
 911         atomic_inc(&local->usage);
 912 }
 913
 914 static inline
 915 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
 916 {
 917         return atomic_inc_not_zero(&local->usage) ? local : NULL;
 918 }
 919
 920 static inline void rxrpc_put_local(struct rxrpc_local *local)
 921 {
 922         if (local && atomic_dec_and_test(&local->usage))
 923                 __rxrpc_put_local(local);
 924 }
 925
 926 static inline void rxrpc_queue_local(struct rxrpc_local *local)
 927 {
 928         rxrpc_queue_work(&local->processor);
 929 }
 930
 931 /*
 932  * misc.c
 933  */
 934 extern unsigned int rxrpc_max_backlog __read_mostly;
 935 extern unsigned int rxrpc_requested_ack_delay;
 936 extern unsigned int rxrpc_soft_ack_delay;
 937 extern unsigned int rxrpc_idle_ack_delay;
 938 extern unsigned int rxrpc_rx_window_size;
 939 extern unsigned int rxrpc_rx_mtu;
 940 extern unsigned int rxrpc_rx_jumbo_max;
 941 extern unsigned int rxrpc_resend_timeout;
 942
 943 extern const s8 rxrpc_ack_priority[];
 944
 945 /*
 946  * output.c
 947  */
 948 int rxrpc_send_call_packet(struct rxrpc_call *, u8);
 949 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *);
 950 void rxrpc_reject_packets(struct rxrpc_local *);
 951
 952 /*
 953  * peer_event.c
 954  */
 955 void rxrpc_error_report(struct sock *);
 956 void rxrpc_peer_error_distributor(struct work_struct *);
 957
 958 /*
 959  * peer_object.c
 960  */
 961 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
 962                                          const struct sockaddr_rxrpc *);
 963 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
 964                                      struct sockaddr_rxrpc *, gfp_t);
 965 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
 966 struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *,
 967                                               struct rxrpc_peer *);
 968
 969 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
 970 {
 971         atomic_inc(&peer->usage);
 972         return peer;
 973 }
 974
 975 static inline
 976 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
 977 {
 978         return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
 979 }
 980
 981 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
 982 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
 983 {
 984         if (peer && atomic_dec_and_test(&peer->usage))
 985                 __rxrpc_put_peer(peer);
 986 }
 987
 988 /*
 989  * proc.c
 990  */
 991 extern const struct file_operations rxrpc_call_seq_fops;
 992 extern const struct file_operations rxrpc_connection_seq_fops;
 993
 994 /*
 995  * recvmsg.c
 996  */
 997 void rxrpc_notify_socket(struct rxrpc_call *);
 998 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
 999
1000 /*
1001  * rxkad.c
1002  */
1003 #ifdef CONFIG_RXKAD
1004 extern const struct rxrpc_security rxkad;
1005 #endif
1006
1007 /*
1008  * security.c
1009  */
1010 int __init rxrpc_init_security(void);
1011 void rxrpc_exit_security(void);
1012 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
1013 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
1014
1015 /*
1016  * sendmsg.c
1017  */
1018 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
1019
1020 /*
1021  * skbuff.c
1022  */
1023 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
1024 void rxrpc_packet_destructor(struct sk_buff *);
1025 void rxrpc_new_skb(struct sk_buff *, enum rxrpc_skb_trace);
1026 void rxrpc_see_skb(struct sk_buff *, enum rxrpc_skb_trace);
1027 void rxrpc_get_skb(struct sk_buff *, enum rxrpc_skb_trace);
1028 void rxrpc_free_skb(struct sk_buff *, enum rxrpc_skb_trace);
1029 void rxrpc_lose_skb(struct sk_buff *, enum rxrpc_skb_trace);
1030 void rxrpc_purge_queue(struct sk_buff_head *);
1031
1032 /*
1033  * sysctl.c
1034  */
1035 #ifdef CONFIG_SYSCTL
1036 extern int __init rxrpc_sysctl_init(void);
1037 extern void rxrpc_sysctl_exit(void);
1038 #else
1039 static inline int __init rxrpc_sysctl_init(void) { return 0; }
1040 static inline void rxrpc_sysctl_exit(void) {}
1041 #endif
1042
1043 /*
1044  * utils.c
1045  */
1046 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
1047
1048 static inline bool before(u32 seq1, u32 seq2)
1049 {
1050         return (s32)(seq1 - seq2) < 0;
1051 }
1052 static inline bool before_eq(u32 seq1, u32 seq2)
1053 {
1054         return (s32)(seq1 - seq2) <= 0;
1055 }
1056 static inline bool after(u32 seq1, u32 seq2)
1057 {
1058         return (s32)(seq1 - seq2) > 0;
1059 }
1060 static inline bool after_eq(u32 seq1, u32 seq2)
1061 {
1062         return (s32)(seq1 - seq2) >= 0;
1063 }
1064
1065 /*
1066  * debug tracing
1067  */
1068 extern unsigned int rxrpc_debug;
1069
1070 #define dbgprintk(FMT,...) \
1071         printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
1072
1073 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1074 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1075 #define kdebug(FMT,...) dbgprintk("    "FMT ,##__VA_ARGS__)
1076 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
1077 #define knet(FMT,...)   dbgprintk("@@@ "FMT ,##__VA_ARGS__)
1078
1079
1080 #if defined(__KDEBUG)
1081 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
1082 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
1083 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
1084 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
1085 #define _net(FMT,...)   knet(FMT,##__VA_ARGS__)
1086
1087 #elif defined(CONFIG_AF_RXRPC_DEBUG)
1088 #define RXRPC_DEBUG_KENTER      0x01
1089 #define RXRPC_DEBUG_KLEAVE      0x02
1090 #define RXRPC_DEBUG_KDEBUG      0x04
1091 #define RXRPC_DEBUG_KPROTO      0x08
1092 #define RXRPC_DEBUG_KNET        0x10
1093
1094 #define _enter(FMT,...)                                 \
1095 do {                                                    \
1096         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
1097                 kenter(FMT,##__VA_ARGS__);              \
1098 } while (0)
1099
1100 #define _leave(FMT,...)                                 \
1101 do {                                                    \
1102         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1103                 kleave(FMT,##__VA_ARGS__);              \
1104 } while (0)
1105
1106 #define _debug(FMT,...)                                 \
1107 do {                                                    \
1108         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1109                 kdebug(FMT,##__VA_ARGS__);              \
1110 } while (0)
1111
1112 #define _proto(FMT,...)                                 \
1113 do {                                                    \
1114         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1115                 kproto(FMT,##__VA_ARGS__);              \
1116 } while (0)
1117
1118 #define _net(FMT,...)                                   \
1119 do {                                                    \
1120         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET))   \
1121                 knet(FMT,##__VA_ARGS__);                \
1122 } while (0)
1123
1124 #else
1125 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1126 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1127 #define _debug(FMT,...) no_printk("    "FMT ,##__VA_ARGS__)
1128 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1129 #define _net(FMT,...)   no_printk("@@@ "FMT ,##__VA_ARGS__)
1130 #endif
1131
1132 /*
1133  * debug assertion checking
1134  */
1135 #if 1 // defined(__KDEBUGALL)
1136
1137 #define ASSERT(X)                                               \
1138 do {                                                            \
1139         if (unlikely(!(X))) {                                   \
1140                 pr_err("Assertion failed\n");                   \
1141                 BUG();                                          \
1142         }                                                       \
1143 } while (0)
1144
1145 #define ASSERTCMP(X, OP, Y)                                             \
1146 do {                                                                    \
1147         __typeof__(X) _x = (X);                                         \
1148         __typeof__(Y) _y = (__typeof__(X))(Y);                          \
1149         if (unlikely(!(_x OP _y))) {                                    \
1150                 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1151                        (unsigned long)_x, (unsigned long)_x, #OP,       \
1152                        (unsigned long)_y, (unsigned long)_y);           \
1153                 BUG();                                                  \
1154         }                                                               \
1155 } while (0)
1156
1157 #define ASSERTIF(C, X)                                          \
1158 do {                                                            \
1159         if (unlikely((C) && !(X))) {                            \
1160                 pr_err("Assertion failed\n");                   \
1161                 BUG();                                          \
1162         }                                                       \
1163 } while (0)
1164
1165 #define ASSERTIFCMP(C, X, OP, Y)                                        \
1166 do {                                                                    \
1167         __typeof__(X) _x = (X);                                         \
1168         __typeof__(Y) _y = (__typeof__(X))(Y);                          \
1169         if (unlikely((C) && !(_x OP _y))) {                             \
1170                 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1171                        (unsigned long)_x, (unsigned long)_x, #OP,       \
1172                        (unsigned long)_y, (unsigned long)_y);           \
1173                 BUG();                                                  \
1174         }                                                               \
1175 } while (0)
1176
1177 #else
1178
1179 #define ASSERT(X)                               \
1180 do {                                            \
1181 } while (0)
1182
1183 #define ASSERTCMP(X, OP, Y)                     \
1184 do {                                            \
1185 } while (0)
1186
1187 #define ASSERTIF(C, X)                          \
1188 do {                                            \
1189 } while (0)
1190
1191 #define ASSERTIFCMP(C, X, OP, Y)                \
1192 do {                                            \
1193 } while (0)
1194
1195 #endif /* __KDEBUGALL */