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 list_head        secureq;        /* calls awaiting connection security clearance */
  98         struct list_head        acceptq;        /* calls awaiting acceptance */
  99         struct rxrpc_backlog    *backlog;       /* Preallocation for services */
 100         struct key              *key;           /* security for this socket */
 101         struct key              *securities;    /* list of server security descriptors */
 102         struct rb_root          calls;          /* User ID -> call mapping */
 103         unsigned long           flags;
 104 #define RXRPC_SOCK_CONNECTED            0       /* connect_srx is set */
 105         rwlock_t                call_lock;      /* lock for calls */
 106         u32                     min_sec_level;  /* minimum security level */
 107 #define RXRPC_SECURITY_MAX      RXRPC_SECURITY_ENCRYPT
 108         bool                    exclusive;      /* Exclusive connection for a client socket */
 109         sa_family_t             family;         /* Protocol family created with */
 110         struct sockaddr_rxrpc   srx;            /* local address */
 111         struct sockaddr_rxrpc   connect_srx;    /* Default client address from connect() */
 112 };
 113
 114 #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk)
 115
 116 /*
 117  * CPU-byteorder normalised Rx packet header.
 118  */
 119 struct rxrpc_host_header {
 120         u32             epoch;          /* client boot timestamp */
 121         u32             cid;            /* connection and channel ID */
 122         u32             callNumber;     /* call ID (0 for connection-level packets) */
 123         u32             seq;            /* sequence number of pkt in call stream */
 124         u32             serial;         /* serial number of pkt sent to network */
 125         u8              type;           /* packet type */
 126         u8              flags;          /* packet flags */
 127         u8              userStatus;     /* app-layer defined status */
 128         u8              securityIndex;  /* security protocol ID */
 129         union {
 130                 u16     _rsvd;          /* reserved */
 131                 u16     cksum;          /* kerberos security checksum */
 132         };
 133         u16             serviceId;      /* service ID */
 134 } __packed;
 135
 136 /*
 137  * RxRPC socket buffer private variables
 138  * - max 48 bytes (struct sk_buff::cb)
 139  */
 140 struct rxrpc_skb_priv {
 141         struct rxrpc_call       *call;          /* call with which associated */
 142         unsigned long           resend_at;      /* time in jiffies at which to resend */
 143         union {
 144                 unsigned int    offset;         /* offset into buffer of next read */
 145                 int             remain;         /* amount of space remaining for next write */
 146                 u32             error;          /* network error code */
 147                 bool            need_resend;    /* T if needs resending */
 148         };
 149
 150         struct rxrpc_host_header hdr;           /* RxRPC packet header from this packet */
 151 };
 152
 153 #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb)
 154
 155 /*
 156  * RxRPC security module interface
 157  */
 158 struct rxrpc_security {
 159         const char              *name;          /* name of this service */
 160         u8                      security_index; /* security type provided */
 161
 162         /* Initialise a security service */
 163         int (*init)(void);
 164
 165         /* Clean up a security service */
 166         void (*exit)(void);
 167
 168         /* initialise a connection's security */
 169         int (*init_connection_security)(struct rxrpc_connection *);
 170
 171         /* prime a connection's packet security */
 172         int (*prime_packet_security)(struct rxrpc_connection *);
 173
 174         /* impose security on a packet */
 175         int (*secure_packet)(struct rxrpc_call *,
 176                              struct sk_buff *,
 177                              size_t,
 178                              void *);
 179
 180         /* verify the security on a received packet */
 181         int (*verify_packet)(struct rxrpc_call *, struct sk_buff *,
 182                              rxrpc_seq_t, u16);
 183
 184         /* issue a challenge */
 185         int (*issue_challenge)(struct rxrpc_connection *);
 186
 187         /* respond to a challenge */
 188         int (*respond_to_challenge)(struct rxrpc_connection *,
 189                                     struct sk_buff *,
 190                                     u32 *);
 191
 192         /* verify a response */
 193         int (*verify_response)(struct rxrpc_connection *,
 194                                struct sk_buff *,
 195                                u32 *);
 196
 197         /* clear connection security */
 198         void (*clear)(struct rxrpc_connection *);
 199 };
 200
 201 /*
 202  * RxRPC local transport endpoint description
 203  * - owned by a single AF_RXRPC socket
 204  * - pointed to by transport socket struct sk_user_data
 205  */
 206 struct rxrpc_local {
 207         struct rcu_head         rcu;
 208         atomic_t                usage;
 209         struct list_head        link;
 210         struct socket           *socket;        /* my UDP socket */
 211         struct work_struct      processor;
 212         struct hlist_head       services;       /* services listening on this endpoint */
 213         struct rw_semaphore     defrag_sem;     /* control re-enablement of IP DF bit */
 214         struct sk_buff_head     accept_queue;   /* incoming calls awaiting acceptance */
 215         struct sk_buff_head     reject_queue;   /* packets awaiting rejection */
 216         struct sk_buff_head     event_queue;    /* endpoint event packets awaiting processing */
 217         struct rb_root          client_conns;   /* Client connections by socket params */
 218         spinlock_t              client_conns_lock; /* Lock for client_conns */
 219         spinlock_t              lock;           /* access lock */
 220         rwlock_t                services_lock;  /* lock for services list */
 221         int                     debug_id;       /* debug ID for printks */
 222         bool                    dead;
 223         struct sockaddr_rxrpc   srx;            /* local address */
 224 };
 225
 226 /*
 227  * RxRPC remote transport endpoint definition
 228  * - matched by local endpoint, remote port, address and protocol type
 229  */
 230 struct rxrpc_peer {
 231         struct rcu_head         rcu;            /* This must be first */
 232         atomic_t                usage;
 233         unsigned long           hash_key;
 234         struct hlist_node       hash_link;
 235         struct rxrpc_local      *local;
 236         struct hlist_head       error_targets;  /* targets for net error distribution */
 237         struct work_struct      error_distributor;
 238         struct rb_root          service_conns;  /* Service connections */
 239         seqlock_t               service_conn_lock;
 240         spinlock_t              lock;           /* access lock */
 241         unsigned int            if_mtu;         /* interface MTU for this peer */
 242         unsigned int            mtu;            /* network MTU for this peer */
 243         unsigned int            maxdata;        /* data size (MTU - hdrsize) */
 244         unsigned short          hdrsize;        /* header size (IP + UDP + RxRPC) */
 245         int                     debug_id;       /* debug ID for printks */
 246         int                     error_report;   /* Net (+0) or local (+1000000) to distribute */
 247 #define RXRPC_LOCAL_ERROR_OFFSET 1000000
 248         struct sockaddr_rxrpc   srx;            /* remote address */
 249
 250         /* calculated RTT cache */
 251 #define RXRPC_RTT_CACHE_SIZE 32
 252         suseconds_t             rtt;            /* current RTT estimate (in uS) */
 253         unsigned int            rtt_point;      /* next entry at which to insert */
 254         unsigned int            rtt_usage;      /* amount of cache actually used */
 255         suseconds_t             rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */
 256 };
 257
 258 /*
 259  * Keys for matching a connection.
 260  */
 261 struct rxrpc_conn_proto {
 262         union {
 263                 struct {
 264                         u32     epoch;          /* epoch of this connection */
 265                         u32     cid;            /* connection ID */
 266                 };
 267                 u64             index_key;
 268         };
 269 };
 270
 271 struct rxrpc_conn_parameters {
 272         struct rxrpc_local      *local;         /* Representation of local endpoint */
 273         struct rxrpc_peer       *peer;          /* Remote endpoint */
 274         struct key              *key;           /* Security details */
 275         bool                    exclusive;      /* T if conn is exclusive */
 276         u16                     service_id;     /* Service ID for this connection */
 277         u32                     security_level; /* Security level selected */
 278 };
 279
 280 /*
 281  * Bits in the connection flags.
 282  */
 283 enum rxrpc_conn_flag {
 284         RXRPC_CONN_HAS_IDR,             /* Has a client conn ID assigned */
 285         RXRPC_CONN_IN_SERVICE_CONNS,    /* Conn is in peer->service_conns */
 286         RXRPC_CONN_IN_CLIENT_CONNS,     /* Conn is in local->client_conns */
 287         RXRPC_CONN_EXPOSED,             /* Conn has extra ref for exposure */
 288         RXRPC_CONN_DONT_REUSE,          /* Don't reuse this connection */
 289         RXRPC_CONN_COUNTED,             /* Counted by rxrpc_nr_client_conns */
 290 };
 291
 292 /*
 293  * Events that can be raised upon a connection.
 294  */
 295 enum rxrpc_conn_event {
 296         RXRPC_CONN_EV_CHALLENGE,        /* Send challenge packet */
 297 };
 298
 299 /*
 300  * The connection cache state.
 301  */
 302 enum rxrpc_conn_cache_state {
 303         RXRPC_CONN_CLIENT_INACTIVE,     /* Conn is not yet listed */
 304         RXRPC_CONN_CLIENT_WAITING,      /* Conn is on wait list, waiting for capacity */
 305         RXRPC_CONN_CLIENT_ACTIVE,       /* Conn is on active list, doing calls */
 306         RXRPC_CONN_CLIENT_CULLED,       /* Conn is culled and delisted, doing calls */
 307         RXRPC_CONN_CLIENT_IDLE,         /* Conn is on idle list, doing mostly nothing */
 308 };
 309
 310 /*
 311  * The connection protocol state.
 312  */
 313 enum rxrpc_conn_proto_state {
 314         RXRPC_CONN_UNUSED,              /* Connection not yet attempted */
 315         RXRPC_CONN_CLIENT,              /* Client connection */
 316         RXRPC_CONN_SERVICE_PREALLOC,    /* Service connection preallocation */
 317         RXRPC_CONN_SERVICE_UNSECURED,   /* Service unsecured connection */
 318         RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */
 319         RXRPC_CONN_SERVICE,             /* Service secured connection */
 320         RXRPC_CONN_REMOTELY_ABORTED,    /* Conn aborted by peer */
 321         RXRPC_CONN_LOCALLY_ABORTED,     /* Conn aborted locally */
 322         RXRPC_CONN__NR_STATES
 323 };
 324
 325 /*
 326  * RxRPC connection definition
 327  * - matched by { local, peer, epoch, conn_id, direction }
 328  * - each connection can only handle four simultaneous calls
 329  */
 330 struct rxrpc_connection {
 331         struct rxrpc_conn_proto proto;
 332         struct rxrpc_conn_parameters params;
 333
 334         atomic_t                usage;
 335         struct rcu_head         rcu;
 336         struct list_head        cache_link;
 337
 338         spinlock_t              channel_lock;
 339         unsigned char           active_chans;   /* Mask of active channels */
 340 #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1)
 341         struct list_head        waiting_calls;  /* Calls waiting for channels */
 342         struct rxrpc_channel {
 343                 struct rxrpc_call __rcu *call;          /* Active call */
 344                 u32                     call_id;        /* ID of current call */
 345                 u32                     call_counter;   /* Call ID counter */
 346                 u32                     last_call;      /* ID of last call */
 347                 u8                      last_type;      /* Type of last packet */
 348                 u16                     last_service_id;
 349                 union {
 350                         u32             last_seq;
 351                         u32             last_abort;
 352                 };
 353         } channels[RXRPC_MAXCALLS];
 354
 355         struct work_struct      processor;      /* connection event processor */
 356         union {
 357                 struct rb_node  client_node;    /* Node in local->client_conns */
 358                 struct rb_node  service_node;   /* Node in peer->service_conns */
 359         };
 360         struct list_head        proc_link;      /* link in procfs list */
 361         struct list_head        link;           /* link in master connection list */
 362         struct sk_buff_head     rx_queue;       /* received conn-level packets */
 363         const struct rxrpc_security *security;  /* applied security module */
 364         struct key              *server_key;    /* security for this service */
 365         struct crypto_skcipher  *cipher;        /* encryption handle */
 366         struct rxrpc_crypt      csum_iv;        /* packet checksum base */
 367         unsigned long           flags;
 368         unsigned long           events;
 369         unsigned long           idle_timestamp; /* Time at which last became idle */
 370         spinlock_t              state_lock;     /* state-change lock */
 371         enum rxrpc_conn_cache_state cache_state;
 372         enum rxrpc_conn_proto_state state;      /* current state of connection */
 373         u32                     local_abort;    /* local abort code */
 374         u32                     remote_abort;   /* remote abort code */
 375         int                     debug_id;       /* debug ID for printks */
 376         atomic_t                serial;         /* packet serial number counter */
 377         unsigned int            hi_serial;      /* highest serial number received */
 378         u8                      size_align;     /* data size alignment (for security) */
 379         u8                      header_size;    /* rxrpc + security header size */
 380         u8                      security_size;  /* security header size */
 381         u32                     security_nonce; /* response re-use preventer */
 382         u8                      security_ix;    /* security type */
 383         u8                      out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */
 384 };
 385
 386 /*
 387  * Flags in call->flags.
 388  */
 389 enum rxrpc_call_flag {
 390         RXRPC_CALL_RELEASED,            /* call has been released - no more message to userspace */
 391         RXRPC_CALL_TERMINAL_MSG,        /* call has given the socket its final message */
 392         RXRPC_CALL_RCVD_LAST,           /* all packets received */
 393         RXRPC_CALL_RUN_RTIMER,          /* Tx resend timer started */
 394         RXRPC_CALL_TX_SOFT_ACK,         /* sent some soft ACKs */
 395         RXRPC_CALL_INIT_ACCEPT,         /* acceptance was initiated */
 396         RXRPC_CALL_HAS_USERID,          /* has a user ID attached */
 397         RXRPC_CALL_EXPECT_OOS,          /* expect out of sequence packets */
 398         RXRPC_CALL_IS_SERVICE,          /* Call is service call */
 399         RXRPC_CALL_EXPOSED,             /* The call was exposed to the world */
 400         RXRPC_CALL_RX_NO_MORE,          /* Don't indicate MSG_MORE from recvmsg() */
 401 };
 402
 403 /*
 404  * Events that can be raised on a call.
 405  */
 406 enum rxrpc_call_event {
 407         RXRPC_CALL_EV_RCVD_ACKALL,      /* ACKALL or reply received */
 408         RXRPC_CALL_EV_RCVD_BUSY,        /* busy packet received */
 409         RXRPC_CALL_EV_RCVD_ABORT,       /* abort packet received */
 410         RXRPC_CALL_EV_RCVD_ERROR,       /* network error received */
 411         RXRPC_CALL_EV_ACK_FINAL,        /* need to generate final ACK (and release call) */
 412         RXRPC_CALL_EV_ACK,              /* need to generate ACK */
 413         RXRPC_CALL_EV_REJECT_BUSY,      /* need to generate busy message */
 414         RXRPC_CALL_EV_ABORT,            /* need to generate abort */
 415         RXRPC_CALL_EV_CONN_ABORT,       /* local connection abort generated */
 416         RXRPC_CALL_EV_RESEND_TIMER,     /* Tx resend timer expired */
 417         RXRPC_CALL_EV_RESEND,           /* Tx resend required */
 418         RXRPC_CALL_EV_DRAIN_RX_OOS,     /* drain the Rx out of sequence queue */
 419         RXRPC_CALL_EV_LIFE_TIMER,       /* call's lifetimer ran out */
 420         RXRPC_CALL_EV_ACCEPTED,         /* incoming call accepted by userspace app */
 421         RXRPC_CALL_EV_SECURED,          /* incoming call's connection is now secure */
 422         RXRPC_CALL_EV_POST_ACCEPT,      /* need to post an "accept?" message to the app */
 423 };
 424
 425 /*
 426  * The states that a call can be in.
 427  */
 428 enum rxrpc_call_state {
 429         RXRPC_CALL_UNINITIALISED,
 430         RXRPC_CALL_CLIENT_AWAIT_CONN,   /* - client waiting for connection to become available */
 431         RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */
 432         RXRPC_CALL_CLIENT_AWAIT_REPLY,  /* - client awaiting reply */
 433         RXRPC_CALL_CLIENT_RECV_REPLY,   /* - client receiving reply phase */
 434         RXRPC_CALL_CLIENT_FINAL_ACK,    /* - client sending final ACK phase */
 435         RXRPC_CALL_SERVER_PREALLOC,     /* - service preallocation */
 436         RXRPC_CALL_SERVER_SECURING,     /* - server securing request connection */
 437         RXRPC_CALL_SERVER_ACCEPTING,    /* - server accepting request */
 438         RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */
 439         RXRPC_CALL_SERVER_ACK_REQUEST,  /* - server pending ACK of request */
 440         RXRPC_CALL_SERVER_SEND_REPLY,   /* - server sending reply */
 441         RXRPC_CALL_SERVER_AWAIT_ACK,    /* - server awaiting final ACK */
 442         RXRPC_CALL_COMPLETE,            /* - call complete */
 443         NR__RXRPC_CALL_STATES
 444 };
 445
 446 /*
 447  * Call completion condition (state == RXRPC_CALL_COMPLETE).
 448  */
 449 enum rxrpc_call_completion {
 450         RXRPC_CALL_SUCCEEDED,           /* - Normal termination */
 451         RXRPC_CALL_SERVER_BUSY,         /* - call rejected by busy server */
 452         RXRPC_CALL_REMOTELY_ABORTED,    /* - call aborted by peer */
 453         RXRPC_CALL_LOCALLY_ABORTED,     /* - call aborted locally on error or close */
 454         RXRPC_CALL_LOCAL_ERROR,         /* - call failed due to local error */
 455         RXRPC_CALL_NETWORK_ERROR,       /* - call terminated by network error */
 456         NR__RXRPC_CALL_COMPLETIONS
 457 };
 458
 459 /*
 460  * RxRPC call definition
 461  * - matched by { connection, call_id }
 462  */
 463 struct rxrpc_call {
 464         struct rcu_head         rcu;
 465         struct rxrpc_connection *conn;          /* connection carrying call */
 466         struct rxrpc_peer       *peer;          /* Peer record for remote address */
 467         struct rxrpc_sock __rcu *socket;        /* socket responsible */
 468         struct timer_list       lifetimer;      /* lifetime remaining on call */
 469         struct timer_list       ack_timer;      /* ACK generation timer */
 470         struct timer_list       resend_timer;   /* Tx resend timer */
 471         struct work_struct      processor;      /* packet processor and ACK generator */
 472         rxrpc_notify_rx_t       notify_rx;      /* kernel service Rx notification function */
 473         struct list_head        link;           /* link in master call list */
 474         struct list_head        chan_wait_link; /* Link in conn->waiting_calls */
 475         struct hlist_node       error_link;     /* link in error distribution list */
 476         struct list_head        accept_link;    /* calls awaiting acceptance */
 477         struct rb_node          sock_node;      /* node in socket call tree */
 478         struct sk_buff_head     rx_queue;       /* received packets */
 479         struct sk_buff_head     rx_oos_queue;   /* packets received out of sequence */
 480         struct sk_buff_head     knlrecv_queue;  /* Queue for kernel_recv [TODO: replace this] */
 481         struct sk_buff          *tx_pending;    /* Tx socket buffer being filled */
 482         wait_queue_head_t       waitq;          /* Wait queue for channel or Tx */
 483         __be32                  crypto_buf[2];  /* Temporary packet crypto buffer */
 484         unsigned long           user_call_ID;   /* user-defined call ID */
 485         unsigned long           creation_jif;   /* time of call creation */
 486         unsigned long           flags;
 487         unsigned long           events;
 488         spinlock_t              lock;
 489         rwlock_t                state_lock;     /* lock for state transition */
 490         u32                     abort_code;     /* Local/remote abort code */
 491         int                     error;          /* Local error incurred */
 492         enum rxrpc_call_state   state;          /* current state of call */
 493         enum rxrpc_call_completion completion;  /* Call completion condition */
 494         atomic_t                usage;
 495         atomic_t                sequence;       /* Tx data packet sequence counter */
 496         u16                     service_id;     /* service ID */
 497         u8                      security_ix;    /* Security type */
 498         u32                     call_id;        /* call ID on connection  */
 499         u32                     cid;            /* connection ID plus channel index */
 500         int                     debug_id;       /* debug ID for printks */
 501
 502         /* transmission-phase ACK management */
 503         u8                      acks_head;      /* offset into window of first entry */
 504         u8                      acks_tail;      /* offset into window of last entry */
 505         u8                      acks_winsz;     /* size of un-ACK'd window */
 506         u8                      acks_unacked;   /* lowest unacked packet in last ACK received */
 507         int                     acks_latest;    /* serial number of latest ACK received */
 508         rxrpc_seq_t             acks_hard;      /* highest definitively ACK'd msg seq */
 509         unsigned long           *acks_window;   /* sent packet window
 510                                                  * - elements are pointers with LSB set if ACK'd
 511                                                  */
 512
 513         /* receive-phase ACK management */
 514         rxrpc_seq_t             rx_data_expect; /* next data seq ID expected to be received */
 515         rxrpc_seq_t             rx_data_post;   /* next data seq ID expected to be posted */
 516         rxrpc_seq_t             rx_data_recv;   /* last data seq ID encountered by recvmsg */
 517         rxrpc_seq_t             rx_data_eaten;  /* last data seq ID consumed by recvmsg */
 518         rxrpc_seq_t             rx_first_oos;   /* first packet in rx_oos_queue (or 0) */
 519         rxrpc_seq_t             ackr_win_top;   /* top of ACK window (rx_data_eaten is bottom) */
 520         rxrpc_seq_t             ackr_prev_seq;  /* previous sequence number received */
 521         u8                      ackr_reason;    /* reason to ACK */
 522         u16                     ackr_skew;      /* skew on packet being ACK'd */
 523         rxrpc_serial_t          ackr_serial;    /* serial of packet being ACK'd */
 524         atomic_t                ackr_not_idle;  /* number of packets in Rx queue */
 525
 526         /* received packet records, 1 bit per record */
 527 #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG)
 528         unsigned long           ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1];
 529 };
 530
 531 enum rxrpc_call_trace {
 532         rxrpc_call_new_client,
 533         rxrpc_call_new_service,
 534         rxrpc_call_queued,
 535         rxrpc_call_queued_ref,
 536         rxrpc_call_seen,
 537         rxrpc_call_got,
 538         rxrpc_call_got_skb,
 539         rxrpc_call_got_userid,
 540         rxrpc_call_put,
 541         rxrpc_call_put_skb,
 542         rxrpc_call_put_userid,
 543         rxrpc_call_put_noqueue,
 544         rxrpc_call__nr_trace
 545 };
 546
 547 extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4];
 548
 549 #include <trace/events/rxrpc.h>
 550
 551 /*
 552  * af_rxrpc.c
 553  */
 554 extern atomic_t rxrpc_n_skbs;
 555 extern u32 rxrpc_epoch;
 556 extern atomic_t rxrpc_debug_id;
 557 extern struct workqueue_struct *rxrpc_workqueue;
 558
 559 /*
 560  * call_accept.c
 561  */
 562 int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t);
 563 void rxrpc_discard_prealloc(struct rxrpc_sock *);
 564 void rxrpc_accept_incoming_calls(struct rxrpc_local *);
 565 struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long,
 566                                      rxrpc_notify_rx_t);
 567 int rxrpc_reject_call(struct rxrpc_sock *);
 568
 569 /*
 570  * call_event.c
 571  */
 572 void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
 573 void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool);
 574 void rxrpc_process_call(struct work_struct *);
 575
 576 /*
 577  * call_object.c
 578  */
 579 extern const char *const rxrpc_call_states[];
 580 extern const char *const rxrpc_call_completions[];
 581 extern unsigned int rxrpc_max_call_lifetime;
 582 extern struct kmem_cache *rxrpc_call_jar;
 583 extern struct list_head rxrpc_calls;
 584 extern rwlock_t rxrpc_call_lock;
 585
 586 struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long);
 587 struct rxrpc_call *rxrpc_alloc_call(gfp_t);
 588 struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *,
 589                                          struct rxrpc_conn_parameters *,
 590                                          struct sockaddr_rxrpc *,
 591                                          unsigned long, gfp_t);
 592 struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *,
 593                                        struct rxrpc_connection *,
 594                                        struct sk_buff *);
 595 void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *);
 596 void rxrpc_release_calls_on_socket(struct rxrpc_sock *);
 597 bool __rxrpc_queue_call(struct rxrpc_call *);
 598 bool rxrpc_queue_call(struct rxrpc_call *);
 599 void rxrpc_see_call(struct rxrpc_call *);
 600 void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace);
 601 void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace);
 602 void rxrpc_get_call_for_skb(struct rxrpc_call *, struct sk_buff *);
 603 void rxrpc_put_call_for_skb(struct rxrpc_call *, struct sk_buff *);
 604 void rxrpc_cleanup_call(struct rxrpc_call *);
 605 void __exit rxrpc_destroy_all_calls(void);
 606
 607 static inline bool rxrpc_is_service_call(const struct rxrpc_call *call)
 608 {
 609         return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags);
 610 }
 611
 612 static inline bool rxrpc_is_client_call(const struct rxrpc_call *call)
 613 {
 614         return !rxrpc_is_service_call(call);
 615 }
 616
 617 /*
 618  * Transition a call to the complete state.
 619  */
 620 static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call,
 621                                                enum rxrpc_call_completion compl,
 622                                                u32 abort_code,
 623                                                int error)
 624 {
 625         if (call->state < RXRPC_CALL_COMPLETE) {
 626                 call->abort_code = abort_code;
 627                 call->error = error;
 628                 call->completion = compl,
 629                 call->state = RXRPC_CALL_COMPLETE;
 630                 return true;
 631         }
 632         return false;
 633 }
 634
 635 static inline bool rxrpc_set_call_completion(struct rxrpc_call *call,
 636                                              enum rxrpc_call_completion compl,
 637                                              u32 abort_code,
 638                                              int error)
 639 {
 640         bool ret;
 641
 642         write_lock_bh(&call->state_lock);
 643         ret = __rxrpc_set_call_completion(call, compl, abort_code, error);
 644         write_unlock_bh(&call->state_lock);
 645         return ret;
 646 }
 647
 648 /*
 649  * Record that a call successfully completed.
 650  */
 651 static inline bool __rxrpc_call_completed(struct rxrpc_call *call)
 652 {
 653         return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0);
 654 }
 655
 656 static inline bool rxrpc_call_completed(struct rxrpc_call *call)
 657 {
 658         bool ret;
 659
 660         write_lock_bh(&call->state_lock);
 661         ret = __rxrpc_call_completed(call);
 662         write_unlock_bh(&call->state_lock);
 663         return ret;
 664 }
 665
 666 /*
 667  * Record that a call is locally aborted.
 668  */
 669 static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call,
 670                                       rxrpc_seq_t seq,
 671                                       u32 abort_code, int error)
 672 {
 673         trace_rxrpc_abort(why, call->cid, call->call_id, seq,
 674                           abort_code, error);
 675         if (__rxrpc_set_call_completion(call,
 676                                         RXRPC_CALL_LOCALLY_ABORTED,
 677                                         abort_code, error)) {
 678                 set_bit(RXRPC_CALL_EV_ABORT, &call->events);
 679                 return true;
 680         }
 681         return false;
 682 }
 683
 684 static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call,
 685                                     rxrpc_seq_t seq, u32 abort_code, int error)
 686 {
 687         bool ret;
 688
 689         write_lock_bh(&call->state_lock);
 690         ret = __rxrpc_abort_call(why, call, seq, abort_code, error);
 691         write_unlock_bh(&call->state_lock);
 692         return ret;
 693 }
 694
 695 /*
 696  * conn_client.c
 697  */
 698 extern unsigned int rxrpc_max_client_connections;
 699 extern unsigned int rxrpc_reap_client_connections;
 700 extern unsigned int rxrpc_conn_idle_client_expiry;
 701 extern unsigned int rxrpc_conn_idle_client_fast_expiry;
 702 extern struct idr rxrpc_client_conn_ids;
 703
 704 void rxrpc_destroy_client_conn_ids(void);
 705 int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *,
 706                        struct sockaddr_rxrpc *, gfp_t);
 707 void rxrpc_expose_client_call(struct rxrpc_call *);
 708 void rxrpc_disconnect_client_call(struct rxrpc_call *);
 709 void rxrpc_put_client_conn(struct rxrpc_connection *);
 710 void __exit rxrpc_destroy_all_client_connections(void);
 711
 712 /*
 713  * conn_event.c
 714  */
 715 void rxrpc_process_connection(struct work_struct *);
 716 void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *);
 717 void rxrpc_reject_packets(struct rxrpc_local *);
 718
 719 /*
 720  * conn_object.c
 721  */
 722 extern unsigned int rxrpc_connection_expiry;
 723 extern struct list_head rxrpc_connections;
 724 extern struct list_head rxrpc_connection_proc_list;
 725 extern rwlock_t rxrpc_connection_lock;
 726
 727 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
 728 struct rxrpc_connection *rxrpc_alloc_connection(gfp_t);
 729 struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *,
 730                                                    struct sk_buff *);
 731 void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *);
 732 void rxrpc_disconnect_call(struct rxrpc_call *);
 733 void rxrpc_kill_connection(struct rxrpc_connection *);
 734 void __rxrpc_put_connection(struct rxrpc_connection *);
 735 void __exit rxrpc_destroy_all_connections(void);
 736
 737 static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn)
 738 {
 739         return conn->out_clientflag;
 740 }
 741
 742 static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn)
 743 {
 744         return !rxrpc_conn_is_client(conn);
 745 }
 746
 747 static inline void rxrpc_get_connection(struct rxrpc_connection *conn)
 748 {
 749         atomic_inc(&conn->usage);
 750 }
 751
 752 static inline
 753 struct rxrpc_connection *rxrpc_get_connection_maybe(struct rxrpc_connection *conn)
 754 {
 755         return atomic_inc_not_zero(&conn->usage) ? conn : NULL;
 756 }
 757
 758 static inline void rxrpc_put_connection(struct rxrpc_connection *conn)
 759 {
 760         if (!conn)
 761                 return;
 762
 763         if (rxrpc_conn_is_client(conn)) {
 764                 if (atomic_dec_and_test(&conn->usage))
 765                         rxrpc_put_client_conn(conn);
 766         } else {
 767                 if (atomic_dec_return(&conn->usage) == 1)
 768                         __rxrpc_put_connection(conn);
 769         }
 770 }
 771
 772 static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn)
 773 {
 774         if (!rxrpc_get_connection_maybe(conn))
 775                 return false;
 776         if (!rxrpc_queue_work(&conn->processor))
 777                 rxrpc_put_connection(conn);
 778         return true;
 779 }
 780
 781 /*
 782  * conn_service.c
 783  */
 784 struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *,
 785                                                      struct sk_buff *);
 786 struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *,
 787                                                    struct sockaddr_rxrpc *,
 788                                                    struct sk_buff *);
 789 struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t);
 790 void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
 791
 792 /*
 793  * input.c
 794  */
 795 void rxrpc_data_ready(struct sock *);
 796 int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool);
 797 void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *);
 798
 799 /*
 800  * insecure.c
 801  */
 802 extern const struct rxrpc_security rxrpc_no_security;
 803
 804 /*
 805  * key.c
 806  */
 807 extern struct key_type key_type_rxrpc;
 808 extern struct key_type key_type_rxrpc_s;
 809
 810 int rxrpc_request_key(struct rxrpc_sock *, char __user *, int);
 811 int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int);
 812 int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t,
 813                               u32);
 814
 815 /*
 816  * local_event.c
 817  */
 818 extern void rxrpc_process_local_events(struct rxrpc_local *);
 819
 820 /*
 821  * local_object.c
 822  */
 823 struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *);
 824 void __rxrpc_put_local(struct rxrpc_local *);
 825 void __exit rxrpc_destroy_all_locals(void);
 826
 827 static inline void rxrpc_get_local(struct rxrpc_local *local)
 828 {
 829         atomic_inc(&local->usage);
 830 }
 831
 832 static inline
 833 struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local)
 834 {
 835         return atomic_inc_not_zero(&local->usage) ? local : NULL;
 836 }
 837
 838 static inline void rxrpc_put_local(struct rxrpc_local *local)
 839 {
 840         if (local && atomic_dec_and_test(&local->usage))
 841                 __rxrpc_put_local(local);
 842 }
 843
 844 static inline void rxrpc_queue_local(struct rxrpc_local *local)
 845 {
 846         rxrpc_queue_work(&local->processor);
 847 }
 848
 849 /*
 850  * misc.c
 851  */
 852 extern unsigned int rxrpc_max_backlog __read_mostly;
 853 extern unsigned int rxrpc_requested_ack_delay;
 854 extern unsigned int rxrpc_soft_ack_delay;
 855 extern unsigned int rxrpc_idle_ack_delay;
 856 extern unsigned int rxrpc_rx_window_size;
 857 extern unsigned int rxrpc_rx_mtu;
 858 extern unsigned int rxrpc_rx_jumbo_max;
 859 extern unsigned int rxrpc_resend_timeout;
 860
 861 extern const char *const rxrpc_pkts[];
 862 extern const s8 rxrpc_ack_priority[];
 863
 864 extern const char *rxrpc_acks(u8 reason);
 865
 866 /*
 867  * output.c
 868  */
 869 int rxrpc_send_call_packet(struct rxrpc_call *, u8);
 870 int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *);
 871
 872 /*
 873  * peer_event.c
 874  */
 875 void rxrpc_error_report(struct sock *);
 876 void rxrpc_peer_error_distributor(struct work_struct *);
 877
 878 /*
 879  * peer_object.c
 880  */
 881 struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *,
 882                                          const struct sockaddr_rxrpc *);
 883 struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *,
 884                                      struct sockaddr_rxrpc *, gfp_t);
 885 struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t);
 886
 887 static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer)
 888 {
 889         atomic_inc(&peer->usage);
 890         return peer;
 891 }
 892
 893 static inline
 894 struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer)
 895 {
 896         return atomic_inc_not_zero(&peer->usage) ? peer : NULL;
 897 }
 898
 899 extern void __rxrpc_put_peer(struct rxrpc_peer *peer);
 900 static inline void rxrpc_put_peer(struct rxrpc_peer *peer)
 901 {
 902         if (peer && atomic_dec_and_test(&peer->usage))
 903                 __rxrpc_put_peer(peer);
 904 }
 905
 906 /*
 907  * proc.c
 908  */
 909 extern const struct file_operations rxrpc_call_seq_fops;
 910 extern const struct file_operations rxrpc_connection_seq_fops;
 911
 912 /*
 913  * recvmsg.c
 914  */
 915 int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int);
 916
 917 /*
 918  * rxkad.c
 919  */
 920 #ifdef CONFIG_RXKAD
 921 extern const struct rxrpc_security rxkad;
 922 #endif
 923
 924 /*
 925  * security.c
 926  */
 927 int __init rxrpc_init_security(void);
 928 void rxrpc_exit_security(void);
 929 int rxrpc_init_client_conn_security(struct rxrpc_connection *);
 930 int rxrpc_init_server_conn_security(struct rxrpc_connection *);
 931
 932 /*
 933  * sendmsg.c
 934  */
 935 int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t);
 936
 937 /*
 938  * skbuff.c
 939  */
 940 void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *);
 941 void rxrpc_packet_destructor(struct sk_buff *);
 942 void rxrpc_new_skb(struct sk_buff *);
 943 void rxrpc_see_skb(struct sk_buff *);
 944 void rxrpc_get_skb(struct sk_buff *);
 945 void rxrpc_free_skb(struct sk_buff *);
 946 void rxrpc_purge_queue(struct sk_buff_head *);
 947
 948 /*
 949  * sysctl.c
 950  */
 951 #ifdef CONFIG_SYSCTL
 952 extern int __init rxrpc_sysctl_init(void);
 953 extern void rxrpc_sysctl_exit(void);
 954 #else
 955 static inline int __init rxrpc_sysctl_init(void) { return 0; }
 956 static inline void rxrpc_sysctl_exit(void) {}
 957 #endif
 958
 959 /*
 960  * utils.c
 961  */
 962 int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *);
 963
 964 /*
 965  * debug tracing
 966  */
 967 extern unsigned int rxrpc_debug;
 968
 969 #define dbgprintk(FMT,...) \
 970         printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__)
 971
 972 #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
 973 #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
 974 #define kdebug(FMT,...) dbgprintk("    "FMT ,##__VA_ARGS__)
 975 #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__)
 976 #define knet(FMT,...)   dbgprintk("@@@ "FMT ,##__VA_ARGS__)
 977
 978
 979 #if defined(__KDEBUG)
 980 #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__)
 981 #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__)
 982 #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__)
 983 #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__)
 984 #define _net(FMT,...)   knet(FMT,##__VA_ARGS__)
 985
 986 #elif defined(CONFIG_AF_RXRPC_DEBUG)
 987 #define RXRPC_DEBUG_KENTER      0x01
 988 #define RXRPC_DEBUG_KLEAVE      0x02
 989 #define RXRPC_DEBUG_KDEBUG      0x04
 990 #define RXRPC_DEBUG_KPROTO      0x08
 991 #define RXRPC_DEBUG_KNET        0x10
 992
 993 #define _enter(FMT,...)                                 \
 994 do {                                                    \
 995         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \
 996                 kenter(FMT,##__VA_ARGS__);              \
 997 } while (0)
 998
 999 #define _leave(FMT,...)                                 \
1000 do {                                                    \
1001         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \
1002                 kleave(FMT,##__VA_ARGS__);              \
1003 } while (0)
1004
1005 #define _debug(FMT,...)                                 \
1006 do {                                                    \
1007         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \
1008                 kdebug(FMT,##__VA_ARGS__);              \
1009 } while (0)
1010
1011 #define _proto(FMT,...)                                 \
1012 do {                                                    \
1013         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \
1014                 kproto(FMT,##__VA_ARGS__);              \
1015 } while (0)
1016
1017 #define _net(FMT,...)                                   \
1018 do {                                                    \
1019         if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET))   \
1020                 knet(FMT,##__VA_ARGS__);                \
1021 } while (0)
1022
1023 #else
1024 #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__)
1025 #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__)
1026 #define _debug(FMT,...) no_printk("    "FMT ,##__VA_ARGS__)
1027 #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__)
1028 #define _net(FMT,...)   no_printk("@@@ "FMT ,##__VA_ARGS__)
1029 #endif
1030
1031 /*
1032  * debug assertion checking
1033  */
1034 #if 1 // defined(__KDEBUGALL)
1035
1036 #define ASSERT(X)                                               \
1037 do {                                                            \
1038         if (unlikely(!(X))) {                                   \
1039                 pr_err("Assertion failed\n");                   \
1040                 BUG();                                          \
1041         }                                                       \
1042 } while (0)
1043
1044 #define ASSERTCMP(X, OP, Y)                                             \
1045 do {                                                                    \
1046         __typeof__(X) _x = (X);                                         \
1047         __typeof__(Y) _y = (__typeof__(X))(Y);                          \
1048         if (unlikely(!(_x OP _y))) {                                    \
1049                 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1050                        (unsigned long)_x, (unsigned long)_x, #OP,       \
1051                        (unsigned long)_y, (unsigned long)_y);           \
1052                 BUG();                                                  \
1053         }                                                               \
1054 } while (0)
1055
1056 #define ASSERTIF(C, X)                                          \
1057 do {                                                            \
1058         if (unlikely((C) && !(X))) {                            \
1059                 pr_err("Assertion failed\n");                   \
1060                 BUG();                                          \
1061         }                                                       \
1062 } while (0)
1063
1064 #define ASSERTIFCMP(C, X, OP, Y)                                        \
1065 do {                                                                    \
1066         __typeof__(X) _x = (X);                                         \
1067         __typeof__(Y) _y = (__typeof__(X))(Y);                          \
1068         if (unlikely((C) && !(_x OP _y))) {                             \
1069                 pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \
1070                        (unsigned long)_x, (unsigned long)_x, #OP,       \
1071                        (unsigned long)_y, (unsigned long)_y);           \
1072                 BUG();                                                  \
1073         }                                                               \
1074 } while (0)
1075
1076 #else
1077
1078 #define ASSERT(X)                               \
1079 do {                                            \
1080 } while (0)
1081
1082 #define ASSERTCMP(X, OP, Y)                     \
1083 do {                                            \
1084 } while (0)
1085
1086 #define ASSERTIF(C, X)                          \
1087 do {                                            \
1088 } while (0)
1089
1090 #define ASSERTIFCMP(C, X, OP, Y)                \
1091 do {                                            \
1092 } while (0)
1093
1094 #endif /* __KDEBUGALL */