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17926a79 DH |
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 | ||
be6e6707 | 12 | #include <linux/atomic.h> |
e0e4d82f | 13 | #include <net/sock.h> |
be6e6707 | 14 | #include <net/af_rxrpc.h> |
17926a79 DH |
15 | #include <rxrpc/packet.h> |
16 | ||
17 | #if 0 | |
18 | #define CHECK_SLAB_OKAY(X) \ | |
19 | BUG_ON(atomic_read((X)) >> (sizeof(atomic_t) - 2) == \ | |
20 | (POISON_FREE << 8 | POISON_FREE)) | |
21 | #else | |
b4f1342f | 22 | #define CHECK_SLAB_OKAY(X) do {} while (0) |
17926a79 DH |
23 | #endif |
24 | ||
17926a79 DH |
25 | #define FCRYPT_BSIZE 8 |
26 | struct rxrpc_crypt { | |
27 | union { | |
28 | u8 x[FCRYPT_BSIZE]; | |
91e916cf | 29 | __be32 n[2]; |
17926a79 DH |
30 | }; |
31 | } __attribute__((aligned(8))); | |
32 | ||
651350d1 DH |
33 | #define rxrpc_queue_work(WS) queue_work(rxrpc_workqueue, (WS)) |
34 | #define rxrpc_queue_delayed_work(WS,D) \ | |
35 | queue_delayed_work(rxrpc_workqueue, (WS), (D)) | |
36 | ||
37 | #define rxrpc_queue_call(CALL) rxrpc_queue_work(&(CALL)->processor) | |
17926a79 | 38 | |
cc8feb8e DH |
39 | struct rxrpc_connection; |
40 | ||
17926a79 DH |
41 | /* |
42 | * sk_state for RxRPC sockets | |
43 | */ | |
44 | enum { | |
2341e077 DH |
45 | RXRPC_UNBOUND = 0, |
46 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ | |
17926a79 | 47 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
17926a79 DH |
48 | RXRPC_SERVER_BOUND, /* server local address bound */ |
49 | RXRPC_SERVER_LISTENING, /* server listening for connections */ | |
50 | RXRPC_CLOSE, /* socket is being closed */ | |
51 | }; | |
52 | ||
53 | /* | |
54 | * RxRPC socket definition | |
55 | */ | |
56 | struct rxrpc_sock { | |
57 | /* WARNING: sk has to be the first member */ | |
58 | struct sock sk; | |
651350d1 | 59 | rxrpc_interceptor_t interceptor; /* kernel service Rx interceptor function */ |
17926a79 | 60 | struct rxrpc_local *local; /* local endpoint */ |
17926a79 DH |
61 | struct list_head listen_link; /* link in the local endpoint's listen list */ |
62 | struct list_head secureq; /* calls awaiting connection security clearance */ | |
63 | struct list_head acceptq; /* calls awaiting acceptance */ | |
64 | struct key *key; /* security for this socket */ | |
65 | struct key *securities; /* list of server security descriptors */ | |
66 | struct rb_root calls; /* outstanding calls on this socket */ | |
67 | unsigned long flags; | |
2341e077 | 68 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
17926a79 DH |
69 | rwlock_t call_lock; /* lock for calls */ |
70 | u32 min_sec_level; /* minimum security level */ | |
71 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT | |
cc8feb8e DH |
72 | bool exclusive; /* Exclusive connection for a client socket */ |
73 | sa_family_t family; /* Protocol family created with */ | |
17926a79 | 74 | struct sockaddr_rxrpc srx; /* local address */ |
2341e077 | 75 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
17926a79 DH |
76 | }; |
77 | ||
78 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) | |
79 | ||
0d12f8a4 DH |
80 | /* |
81 | * CPU-byteorder normalised Rx packet header. | |
82 | */ | |
83 | struct rxrpc_host_header { | |
84 | u32 epoch; /* client boot timestamp */ | |
85 | u32 cid; /* connection and channel ID */ | |
86 | u32 callNumber; /* call ID (0 for connection-level packets) */ | |
87 | u32 seq; /* sequence number of pkt in call stream */ | |
88 | u32 serial; /* serial number of pkt sent to network */ | |
89 | u8 type; /* packet type */ | |
90 | u8 flags; /* packet flags */ | |
91 | u8 userStatus; /* app-layer defined status */ | |
92 | u8 securityIndex; /* security protocol ID */ | |
93 | union { | |
94 | u16 _rsvd; /* reserved */ | |
95 | u16 cksum; /* kerberos security checksum */ | |
96 | }; | |
97 | u16 serviceId; /* service ID */ | |
98 | } __packed; | |
99 | ||
17926a79 DH |
100 | /* |
101 | * RxRPC socket buffer private variables | |
102 | * - max 48 bytes (struct sk_buff::cb) | |
103 | */ | |
104 | struct rxrpc_skb_priv { | |
105 | struct rxrpc_call *call; /* call with which associated */ | |
106 | unsigned long resend_at; /* time in jiffies at which to resend */ | |
107 | union { | |
95c96174 | 108 | unsigned int offset; /* offset into buffer of next read */ |
17926a79 DH |
109 | int remain; /* amount of space remaining for next write */ |
110 | u32 error; /* network error code */ | |
111 | bool need_resend; /* T if needs resending */ | |
112 | }; | |
113 | ||
0d12f8a4 | 114 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
17926a79 DH |
115 | }; |
116 | ||
117 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) | |
118 | ||
17926a79 DH |
119 | enum rxrpc_command { |
120 | RXRPC_CMD_SEND_DATA, /* send data message */ | |
121 | RXRPC_CMD_SEND_ABORT, /* request abort generation */ | |
122 | RXRPC_CMD_ACCEPT, /* [server] accept incoming call */ | |
123 | RXRPC_CMD_REJECT_BUSY, /* [server] reject a call as busy */ | |
124 | }; | |
125 | ||
126 | /* | |
127 | * RxRPC security module interface | |
128 | */ | |
129 | struct rxrpc_security { | |
17926a79 DH |
130 | const char *name; /* name of this service */ |
131 | u8 security_index; /* security type provided */ | |
132 | ||
648af7fc DH |
133 | /* Initialise a security service */ |
134 | int (*init)(void); | |
135 | ||
136 | /* Clean up a security service */ | |
137 | void (*exit)(void); | |
138 | ||
17926a79 DH |
139 | /* initialise a connection's security */ |
140 | int (*init_connection_security)(struct rxrpc_connection *); | |
141 | ||
142 | /* prime a connection's packet security */ | |
a263629d | 143 | int (*prime_packet_security)(struct rxrpc_connection *); |
17926a79 DH |
144 | |
145 | /* impose security on a packet */ | |
a263629d | 146 | int (*secure_packet)(struct rxrpc_call *, |
17926a79 DH |
147 | struct sk_buff *, |
148 | size_t, | |
149 | void *); | |
150 | ||
151 | /* verify the security on a received packet */ | |
a263629d | 152 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, u32 *); |
17926a79 DH |
153 | |
154 | /* issue a challenge */ | |
155 | int (*issue_challenge)(struct rxrpc_connection *); | |
156 | ||
157 | /* respond to a challenge */ | |
158 | int (*respond_to_challenge)(struct rxrpc_connection *, | |
159 | struct sk_buff *, | |
160 | u32 *); | |
161 | ||
162 | /* verify a response */ | |
163 | int (*verify_response)(struct rxrpc_connection *, | |
164 | struct sk_buff *, | |
165 | u32 *); | |
166 | ||
167 | /* clear connection security */ | |
168 | void (*clear)(struct rxrpc_connection *); | |
169 | }; | |
170 | ||
171 | /* | |
4f95dd78 DH |
172 | * RxRPC local transport endpoint description |
173 | * - owned by a single AF_RXRPC socket | |
174 | * - pointed to by transport socket struct sk_user_data | |
17926a79 DH |
175 | */ |
176 | struct rxrpc_local { | |
4f95dd78 DH |
177 | struct rcu_head rcu; |
178 | atomic_t usage; | |
179 | struct list_head link; | |
17926a79 | 180 | struct socket *socket; /* my UDP socket */ |
4f95dd78 | 181 | struct work_struct processor; |
17926a79 | 182 | struct list_head services; /* services listening on this endpoint */ |
17926a79 DH |
183 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
184 | struct sk_buff_head accept_queue; /* incoming calls awaiting acceptance */ | |
185 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ | |
44ba0698 | 186 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
999b69f8 DH |
187 | struct rb_root client_conns; /* Client connections by socket params */ |
188 | spinlock_t client_conns_lock; /* Lock for client_conns */ | |
17926a79 DH |
189 | spinlock_t lock; /* access lock */ |
190 | rwlock_t services_lock; /* lock for services list */ | |
17926a79 | 191 | int debug_id; /* debug ID for printks */ |
4f95dd78 | 192 | bool dead; |
17926a79 DH |
193 | struct sockaddr_rxrpc srx; /* local address */ |
194 | }; | |
195 | ||
196 | /* | |
197 | * RxRPC remote transport endpoint definition | |
be6e6707 | 198 | * - matched by local endpoint, remote port, address and protocol type |
17926a79 DH |
199 | */ |
200 | struct rxrpc_peer { | |
be6e6707 DH |
201 | struct rcu_head rcu; /* This must be first */ |
202 | atomic_t usage; | |
203 | unsigned long hash_key; | |
204 | struct hlist_node hash_link; | |
205 | struct rxrpc_local *local; | |
f66d7490 DH |
206 | struct hlist_head error_targets; /* targets for net error distribution */ |
207 | struct work_struct error_distributor; | |
aa390bbe DH |
208 | struct rb_root service_conns; /* Service connections */ |
209 | rwlock_t conn_lock; | |
17926a79 | 210 | spinlock_t lock; /* access lock */ |
95c96174 ED |
211 | unsigned int if_mtu; /* interface MTU for this peer */ |
212 | unsigned int mtu; /* network MTU for this peer */ | |
213 | unsigned int maxdata; /* data size (MTU - hdrsize) */ | |
17926a79 DH |
214 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
215 | int debug_id; /* debug ID for printks */ | |
f66d7490 DH |
216 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
217 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 | |
17926a79 DH |
218 | struct sockaddr_rxrpc srx; /* remote address */ |
219 | ||
220 | /* calculated RTT cache */ | |
221 | #define RXRPC_RTT_CACHE_SIZE 32 | |
222 | suseconds_t rtt; /* current RTT estimate (in uS) */ | |
95c96174 ED |
223 | unsigned int rtt_point; /* next entry at which to insert */ |
224 | unsigned int rtt_usage; /* amount of cache actually used */ | |
17926a79 DH |
225 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
226 | }; | |
227 | ||
19ffa01c DH |
228 | /* |
229 | * Keys for matching a connection. | |
230 | */ | |
231 | struct rxrpc_conn_proto { | |
232 | unsigned long hash_key; | |
233 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
234 | u32 epoch; /* epoch of this connection */ | |
235 | u32 cid; /* connection ID */ | |
236 | u8 in_clientflag; /* RXRPC_CLIENT_INITIATED if we are server */ | |
237 | u8 addr_size; /* Size of the address */ | |
238 | sa_family_t family; /* Transport protocol */ | |
239 | __be16 port; /* Peer UDP/UDP6 port */ | |
240 | union { /* Peer address */ | |
241 | struct in_addr ipv4_addr; | |
242 | struct in6_addr ipv6_addr; | |
243 | u32 raw_addr[0]; | |
244 | }; | |
245 | }; | |
246 | ||
247 | struct rxrpc_conn_parameters { | |
248 | struct rxrpc_local *local; /* Representation of local endpoint */ | |
249 | struct rxrpc_peer *peer; /* Remote endpoint */ | |
250 | struct key *key; /* Security details */ | |
251 | bool exclusive; /* T if conn is exclusive */ | |
252 | u16 service_id; /* Service ID for this connection */ | |
253 | u32 security_level; /* Security level selected */ | |
254 | }; | |
255 | ||
17926a79 DH |
256 | /* |
257 | * RxRPC connection definition | |
aa390bbe | 258 | * - matched by { local, peer, epoch, conn_id, direction } |
17926a79 DH |
259 | * - each connection can only handle four simultaneous calls |
260 | */ | |
261 | struct rxrpc_connection { | |
19ffa01c DH |
262 | struct rxrpc_conn_proto proto; |
263 | struct rxrpc_conn_parameters params; | |
264 | ||
999b69f8 DH |
265 | spinlock_t channel_lock; |
266 | struct rxrpc_call *channels[RXRPC_MAXCALLS]; /* active calls */ | |
267 | wait_queue_head_t channel_wq; /* queue to wait for channel to become available */ | |
268 | ||
17926a79 | 269 | struct work_struct processor; /* connection event processor */ |
999b69f8 DH |
270 | union { |
271 | struct rb_node client_node; /* Node in local->client_conns */ | |
aa390bbe | 272 | struct rb_node service_node; /* Node in peer->service_conns */ |
999b69f8 | 273 | }; |
17926a79 | 274 | struct list_head link; /* link in master connection list */ |
17926a79 DH |
275 | struct rb_root calls; /* calls on this connection */ |
276 | struct sk_buff_head rx_queue; /* received conn-level packets */ | |
648af7fc | 277 | const struct rxrpc_security *security; /* applied security module */ |
17926a79 | 278 | struct key *server_key; /* security for this service */ |
1afe593b | 279 | struct crypto_skcipher *cipher; /* encryption handle */ |
17926a79 | 280 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
4a3388c8 DH |
281 | unsigned long flags; |
282 | #define RXRPC_CONN_HAS_IDR 0 /* - Has a client conn ID assigned */ | |
17926a79 DH |
283 | unsigned long events; |
284 | #define RXRPC_CONN_CHALLENGE 0 /* send challenge packet */ | |
999b69f8 | 285 | unsigned long put_time; /* Time at which last put */ |
17926a79 DH |
286 | rwlock_t lock; /* access lock */ |
287 | spinlock_t state_lock; /* state-change lock */ | |
288 | atomic_t usage; | |
17926a79 DH |
289 | enum { /* current state of connection */ |
290 | RXRPC_CONN_UNUSED, /* - connection not yet attempted */ | |
291 | RXRPC_CONN_CLIENT, /* - client connection */ | |
292 | RXRPC_CONN_SERVER_UNSECURED, /* - server unsecured connection */ | |
293 | RXRPC_CONN_SERVER_CHALLENGING, /* - server challenging for security */ | |
294 | RXRPC_CONN_SERVER, /* - server secured connection */ | |
295 | RXRPC_CONN_REMOTELY_ABORTED, /* - conn aborted by peer */ | |
296 | RXRPC_CONN_LOCALLY_ABORTED, /* - conn aborted locally */ | |
297 | RXRPC_CONN_NETWORK_ERROR, /* - conn terminated by network error */ | |
298 | } state; | |
dc44b3a0 DH |
299 | u32 local_abort; /* local abort code */ |
300 | u32 remote_abort; /* remote abort code */ | |
301 | int error; /* local error incurred */ | |
17926a79 | 302 | int debug_id; /* debug ID for printks */ |
95c96174 | 303 | unsigned int call_counter; /* call ID counter */ |
17926a79 DH |
304 | atomic_t serial; /* packet serial number counter */ |
305 | atomic_t hi_serial; /* highest serial number received */ | |
999b69f8 | 306 | atomic_t avail_chans; /* number of channels available */ |
17926a79 DH |
307 | u8 size_align; /* data size alignment (for security) */ |
308 | u8 header_size; /* rxrpc + security header size */ | |
309 | u8 security_size; /* security header size */ | |
17926a79 | 310 | u32 security_nonce; /* response re-use preventer */ |
17926a79 | 311 | u8 security_ix; /* security type */ |
17926a79 DH |
312 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
313 | }; | |
314 | ||
5b8848d1 DH |
315 | /* |
316 | * Flags in call->flags. | |
317 | */ | |
318 | enum rxrpc_call_flag { | |
319 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ | |
320 | RXRPC_CALL_TERMINAL_MSG, /* call has given the socket its final message */ | |
321 | RXRPC_CALL_RCVD_LAST, /* all packets received */ | |
322 | RXRPC_CALL_RUN_RTIMER, /* Tx resend timer started */ | |
323 | RXRPC_CALL_TX_SOFT_ACK, /* sent some soft ACKs */ | |
324 | RXRPC_CALL_PROC_BUSY, /* the processor is busy */ | |
325 | RXRPC_CALL_INIT_ACCEPT, /* acceptance was initiated */ | |
326 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ | |
327 | RXRPC_CALL_EXPECT_OOS, /* expect out of sequence packets */ | |
328 | }; | |
329 | ||
330 | /* | |
331 | * Events that can be raised on a call. | |
332 | */ | |
333 | enum rxrpc_call_event { | |
4c198ad1 DH |
334 | RXRPC_CALL_EV_RCVD_ACKALL, /* ACKALL or reply received */ |
335 | RXRPC_CALL_EV_RCVD_BUSY, /* busy packet received */ | |
336 | RXRPC_CALL_EV_RCVD_ABORT, /* abort packet received */ | |
337 | RXRPC_CALL_EV_RCVD_ERROR, /* network error received */ | |
338 | RXRPC_CALL_EV_ACK_FINAL, /* need to generate final ACK (and release call) */ | |
339 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ | |
340 | RXRPC_CALL_EV_REJECT_BUSY, /* need to generate busy message */ | |
341 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ | |
342 | RXRPC_CALL_EV_CONN_ABORT, /* local connection abort generated */ | |
343 | RXRPC_CALL_EV_RESEND_TIMER, /* Tx resend timer expired */ | |
344 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ | |
345 | RXRPC_CALL_EV_DRAIN_RX_OOS, /* drain the Rx out of sequence queue */ | |
346 | RXRPC_CALL_EV_LIFE_TIMER, /* call's lifetimer ran out */ | |
347 | RXRPC_CALL_EV_ACCEPTED, /* incoming call accepted by userspace app */ | |
348 | RXRPC_CALL_EV_SECURED, /* incoming call's connection is now secure */ | |
349 | RXRPC_CALL_EV_POST_ACCEPT, /* need to post an "accept?" message to the app */ | |
350 | RXRPC_CALL_EV_RELEASE, /* need to release the call's resources */ | |
5b8848d1 DH |
351 | }; |
352 | ||
353 | /* | |
354 | * The states that a call can be in. | |
355 | */ | |
356 | enum rxrpc_call_state { | |
999b69f8 DH |
357 | RXRPC_CALL_UNINITIALISED, |
358 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ | |
5b8848d1 DH |
359 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
360 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ | |
361 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ | |
362 | RXRPC_CALL_CLIENT_FINAL_ACK, /* - client sending final ACK phase */ | |
363 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ | |
364 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ | |
365 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ | |
366 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ | |
367 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ | |
368 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ | |
369 | RXRPC_CALL_COMPLETE, /* - call completed */ | |
370 | RXRPC_CALL_SERVER_BUSY, /* - call rejected by busy server */ | |
371 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ | |
372 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ | |
373 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ | |
374 | RXRPC_CALL_DEAD, /* - call is dead */ | |
375 | NR__RXRPC_CALL_STATES | |
376 | }; | |
377 | ||
17926a79 DH |
378 | /* |
379 | * RxRPC call definition | |
380 | * - matched by { connection, call_id } | |
381 | */ | |
382 | struct rxrpc_call { | |
383 | struct rxrpc_connection *conn; /* connection carrying call */ | |
384 | struct rxrpc_sock *socket; /* socket responsible */ | |
385 | struct timer_list lifetimer; /* lifetime remaining on call */ | |
386 | struct timer_list deadspan; /* reap timer for re-ACK'ing, etc */ | |
387 | struct timer_list ack_timer; /* ACK generation timer */ | |
388 | struct timer_list resend_timer; /* Tx resend timer */ | |
389 | struct work_struct destroyer; /* call destroyer */ | |
390 | struct work_struct processor; /* packet processor and ACK generator */ | |
391 | struct list_head link; /* link in master call list */ | |
f66d7490 | 392 | struct hlist_node error_link; /* link in error distribution list */ |
17926a79 DH |
393 | struct list_head accept_link; /* calls awaiting acceptance */ |
394 | struct rb_node sock_node; /* node in socket call tree */ | |
395 | struct rb_node conn_node; /* node in connection call tree */ | |
396 | struct sk_buff_head rx_queue; /* received packets */ | |
397 | struct sk_buff_head rx_oos_queue; /* packets received out of sequence */ | |
398 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ | |
399 | wait_queue_head_t tx_waitq; /* wait for Tx window space to become available */ | |
a263629d | 400 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
17926a79 DH |
401 | unsigned long user_call_ID; /* user-defined call ID */ |
402 | unsigned long creation_jif; /* time of call creation */ | |
403 | unsigned long flags; | |
17926a79 | 404 | unsigned long events; |
17926a79 DH |
405 | spinlock_t lock; |
406 | rwlock_t state_lock; /* lock for state transition */ | |
407 | atomic_t usage; | |
408 | atomic_t sequence; /* Tx data packet sequence counter */ | |
dc44b3a0 DH |
409 | u32 local_abort; /* local abort code */ |
410 | u32 remote_abort; /* remote abort code */ | |
f66d7490 DH |
411 | int error_report; /* Network error (ICMP/local transport) */ |
412 | int error; /* Local error incurred */ | |
5b8848d1 | 413 | enum rxrpc_call_state state : 8; /* current state of call */ |
17926a79 DH |
414 | int debug_id; /* debug ID for printks */ |
415 | u8 channel; /* connection channel occupied by this call */ | |
416 | ||
417 | /* transmission-phase ACK management */ | |
4e36a95e DH |
418 | u8 acks_head; /* offset into window of first entry */ |
419 | u8 acks_tail; /* offset into window of last entry */ | |
420 | u8 acks_winsz; /* size of un-ACK'd window */ | |
421 | u8 acks_unacked; /* lowest unacked packet in last ACK received */ | |
17926a79 DH |
422 | int acks_latest; /* serial number of latest ACK received */ |
423 | rxrpc_seq_t acks_hard; /* highest definitively ACK'd msg seq */ | |
424 | unsigned long *acks_window; /* sent packet window | |
425 | * - elements are pointers with LSB set if ACK'd | |
426 | */ | |
427 | ||
428 | /* receive-phase ACK management */ | |
429 | rxrpc_seq_t rx_data_expect; /* next data seq ID expected to be received */ | |
430 | rxrpc_seq_t rx_data_post; /* next data seq ID expected to be posted */ | |
431 | rxrpc_seq_t rx_data_recv; /* last data seq ID encountered by recvmsg */ | |
432 | rxrpc_seq_t rx_data_eaten; /* last data seq ID consumed by recvmsg */ | |
433 | rxrpc_seq_t rx_first_oos; /* first packet in rx_oos_queue (or 0) */ | |
434 | rxrpc_seq_t ackr_win_top; /* top of ACK window (rx_data_eaten is bottom) */ | |
0d12f8a4 | 435 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
4e36a95e | 436 | u8 ackr_reason; /* reason to ACK */ |
0d12f8a4 | 437 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
17926a79 DH |
438 | atomic_t ackr_not_idle; /* number of packets in Rx queue */ |
439 | ||
440 | /* received packet records, 1 bit per record */ | |
441 | #define RXRPC_ACKR_WINDOW_ASZ DIV_ROUND_UP(RXRPC_MAXACKS, BITS_PER_LONG) | |
442 | unsigned long ackr_window[RXRPC_ACKR_WINDOW_ASZ + 1]; | |
443 | ||
7727640c TS |
444 | struct hlist_node hash_node; |
445 | unsigned long hash_key; /* Full hash key */ | |
446 | u8 in_clientflag; /* Copy of conn->in_clientflag for hashing */ | |
447 | struct rxrpc_local *local; /* Local endpoint. Used for hashing. */ | |
19ffa01c | 448 | sa_family_t family; /* Frame protocol */ |
0d12f8a4 DH |
449 | u32 call_id; /* call ID on connection */ |
450 | u32 cid; /* connection ID plus channel index */ | |
451 | u32 epoch; /* epoch of this connection */ | |
452 | u16 service_id; /* service ID */ | |
7727640c TS |
453 | union { /* Peer IP address for hashing */ |
454 | __be32 ipv4_addr; | |
455 | __u8 ipv6_addr[16]; /* Anticipates eventual IPv6 support */ | |
456 | } peer_ip; | |
17926a79 DH |
457 | }; |
458 | ||
17926a79 DH |
459 | /* |
460 | * locally abort an RxRPC call | |
461 | */ | |
462 | static inline void rxrpc_abort_call(struct rxrpc_call *call, u32 abort_code) | |
463 | { | |
464 | write_lock_bh(&call->state_lock); | |
465 | if (call->state < RXRPC_CALL_COMPLETE) { | |
dc44b3a0 | 466 | call->local_abort = abort_code; |
17926a79 | 467 | call->state = RXRPC_CALL_LOCALLY_ABORTED; |
4c198ad1 | 468 | set_bit(RXRPC_CALL_EV_ABORT, &call->events); |
17926a79 DH |
469 | } |
470 | write_unlock_bh(&call->state_lock); | |
471 | } | |
472 | ||
473 | /* | |
651350d1 | 474 | * af_rxrpc.c |
17926a79 | 475 | */ |
651350d1 | 476 | extern atomic_t rxrpc_n_skbs; |
0d12f8a4 | 477 | extern u32 rxrpc_epoch; |
651350d1 DH |
478 | extern atomic_t rxrpc_debug_id; |
479 | extern struct workqueue_struct *rxrpc_workqueue; | |
17926a79 DH |
480 | |
481 | /* | |
0d81a51a | 482 | * call_accept.c |
17926a79 | 483 | */ |
4f95dd78 | 484 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
c1b1203d JP |
485 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long); |
486 | int rxrpc_reject_call(struct rxrpc_sock *); | |
17926a79 DH |
487 | |
488 | /* | |
0d81a51a | 489 | * call_event.c |
17926a79 | 490 | */ |
0d12f8a4 DH |
491 | void __rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); |
492 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u32, bool); | |
c1b1203d | 493 | void rxrpc_process_call(struct work_struct *); |
17926a79 DH |
494 | |
495 | /* | |
0d81a51a | 496 | * call_object.c |
17926a79 | 497 | */ |
dad8aff7 DH |
498 | extern unsigned int rxrpc_max_call_lifetime; |
499 | extern unsigned int rxrpc_dead_call_expiry; | |
17926a79 DH |
500 | extern struct kmem_cache *rxrpc_call_jar; |
501 | extern struct list_head rxrpc_calls; | |
502 | extern rwlock_t rxrpc_call_lock; | |
503 | ||
0d12f8a4 DH |
504 | struct rxrpc_call *rxrpc_find_call_hash(struct rxrpc_host_header *, |
505 | void *, sa_family_t, const void *); | |
2341e077 DH |
506 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
507 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, | |
19ffa01c | 508 | struct rxrpc_conn_parameters *, |
999b69f8 | 509 | struct sockaddr_rxrpc *, |
2341e077 | 510 | unsigned long, gfp_t); |
c1b1203d JP |
511 | struct rxrpc_call *rxrpc_incoming_call(struct rxrpc_sock *, |
512 | struct rxrpc_connection *, | |
42886ffe | 513 | struct sk_buff *); |
c1b1203d JP |
514 | void rxrpc_release_call(struct rxrpc_call *); |
515 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); | |
516 | void __rxrpc_put_call(struct rxrpc_call *); | |
517 | void __exit rxrpc_destroy_all_calls(void); | |
17926a79 | 518 | |
4a3388c8 DH |
519 | /* |
520 | * conn_client.c | |
521 | */ | |
522 | extern struct idr rxrpc_client_conn_ids; | |
523 | ||
999b69f8 | 524 | int rxrpc_get_client_connection_id(struct rxrpc_connection *, gfp_t); |
4a3388c8 DH |
525 | void rxrpc_put_client_connection_id(struct rxrpc_connection *); |
526 | ||
17926a79 | 527 | /* |
0d81a51a DH |
528 | * conn_event.c |
529 | */ | |
530 | void rxrpc_process_connection(struct work_struct *); | |
531 | void rxrpc_reject_packet(struct rxrpc_local *, struct sk_buff *); | |
4f95dd78 | 532 | void rxrpc_reject_packets(struct rxrpc_local *); |
0d81a51a DH |
533 | |
534 | /* | |
535 | * conn_object.c | |
17926a79 | 536 | */ |
dad8aff7 | 537 | extern unsigned int rxrpc_connection_expiry; |
17926a79 DH |
538 | extern struct list_head rxrpc_connections; |
539 | extern rwlock_t rxrpc_connection_lock; | |
540 | ||
999b69f8 | 541 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
999b69f8 | 542 | struct sockaddr_rxrpc *, gfp_t); |
aa390bbe DH |
543 | struct rxrpc_connection *rxrpc_find_connection(struct rxrpc_local *, |
544 | struct rxrpc_peer *, | |
545 | struct sk_buff *); | |
999b69f8 | 546 | void rxrpc_disconnect_call(struct rxrpc_call *); |
c1b1203d JP |
547 | void rxrpc_put_connection(struct rxrpc_connection *); |
548 | void __exit rxrpc_destroy_all_connections(void); | |
aa390bbe DH |
549 | struct rxrpc_connection *rxrpc_incoming_connection(struct rxrpc_local *, |
550 | struct rxrpc_peer *, | |
551 | struct sk_buff *); | |
17926a79 | 552 | |
19ffa01c DH |
553 | static inline bool rxrpc_conn_is_client(const struct rxrpc_connection *conn) |
554 | { | |
555 | return conn->out_clientflag; | |
556 | } | |
557 | ||
558 | static inline bool rxrpc_conn_is_service(const struct rxrpc_connection *conn) | |
559 | { | |
560 | return conn->proto.in_clientflag; | |
561 | } | |
562 | ||
5627cc8b DH |
563 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
564 | { | |
565 | atomic_inc(&conn->usage); | |
566 | } | |
567 | ||
5acbee46 DH |
568 | |
569 | static inline void rxrpc_queue_conn(struct rxrpc_connection *conn) | |
570 | { | |
571 | rxrpc_queue_work(&conn->processor); | |
572 | } | |
573 | ||
17926a79 | 574 | /* |
0d81a51a | 575 | * input.c |
17926a79 | 576 | */ |
0d81a51a DH |
577 | void rxrpc_data_ready(struct sock *); |
578 | int rxrpc_queue_rcv_skb(struct rxrpc_call *, struct sk_buff *, bool, bool); | |
579 | void rxrpc_fast_process_packet(struct rxrpc_call *, struct sk_buff *); | |
17926a79 DH |
580 | |
581 | /* | |
0d81a51a | 582 | * insecure.c |
17926a79 | 583 | */ |
0d81a51a | 584 | extern const struct rxrpc_security rxrpc_no_security; |
17926a79 DH |
585 | |
586 | /* | |
0d81a51a | 587 | * key.c |
17926a79 | 588 | */ |
0d81a51a DH |
589 | extern struct key_type key_type_rxrpc; |
590 | extern struct key_type key_type_rxrpc_s; | |
591 | ||
592 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); | |
593 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); | |
594 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, | |
595 | u32); | |
17926a79 | 596 | |
87563616 DH |
597 | /* |
598 | * local_event.c | |
599 | */ | |
4f95dd78 | 600 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
87563616 | 601 | |
17926a79 | 602 | /* |
0d81a51a | 603 | * local_object.c |
17926a79 | 604 | */ |
4f95dd78 DH |
605 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
606 | void __rxrpc_put_local(struct rxrpc_local *); | |
c1b1203d | 607 | void __exit rxrpc_destroy_all_locals(void); |
17926a79 | 608 | |
4f95dd78 DH |
609 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
610 | { | |
611 | atomic_inc(&local->usage); | |
612 | } | |
613 | ||
614 | static inline | |
615 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) | |
616 | { | |
617 | return atomic_inc_not_zero(&local->usage) ? local : NULL; | |
618 | } | |
619 | ||
620 | static inline void rxrpc_put_local(struct rxrpc_local *local) | |
621 | { | |
5627cc8b | 622 | if (local && atomic_dec_and_test(&local->usage)) |
4f95dd78 DH |
623 | __rxrpc_put_local(local); |
624 | } | |
625 | ||
5acbee46 DH |
626 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
627 | { | |
628 | rxrpc_queue_work(&local->processor); | |
629 | } | |
630 | ||
17926a79 | 631 | /* |
0d81a51a | 632 | * misc.c |
17926a79 | 633 | */ |
0d81a51a DH |
634 | extern unsigned int rxrpc_max_backlog __read_mostly; |
635 | extern unsigned int rxrpc_requested_ack_delay; | |
636 | extern unsigned int rxrpc_soft_ack_delay; | |
637 | extern unsigned int rxrpc_idle_ack_delay; | |
638 | extern unsigned int rxrpc_rx_window_size; | |
639 | extern unsigned int rxrpc_rx_mtu; | |
640 | extern unsigned int rxrpc_rx_jumbo_max; | |
17926a79 | 641 | |
0d81a51a DH |
642 | extern const char *const rxrpc_pkts[]; |
643 | extern const s8 rxrpc_ack_priority[]; | |
644 | ||
645 | extern const char *rxrpc_acks(u8 reason); | |
17926a79 DH |
646 | |
647 | /* | |
0d81a51a | 648 | * output.c |
17926a79 | 649 | */ |
dad8aff7 | 650 | extern unsigned int rxrpc_resend_timeout; |
17926a79 | 651 | |
985a5c82 | 652 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
2341e077 | 653 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
17926a79 DH |
654 | |
655 | /* | |
abe89ef0 | 656 | * peer_event.c |
0d81a51a | 657 | */ |
abe89ef0 | 658 | void rxrpc_error_report(struct sock *); |
f66d7490 | 659 | void rxrpc_peer_error_distributor(struct work_struct *); |
0d81a51a DH |
660 | |
661 | /* | |
662 | * peer_object.c | |
17926a79 | 663 | */ |
be6e6707 DH |
664 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
665 | const struct sockaddr_rxrpc *); | |
666 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, | |
667 | struct sockaddr_rxrpc *, gfp_t); | |
668 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); | |
669 | ||
670 | static inline void rxrpc_get_peer(struct rxrpc_peer *peer) | |
671 | { | |
672 | atomic_inc(&peer->usage); | |
673 | } | |
674 | ||
675 | static inline | |
676 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) | |
677 | { | |
678 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; | |
679 | } | |
680 | ||
681 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); | |
682 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) | |
683 | { | |
5627cc8b | 684 | if (peer && atomic_dec_and_test(&peer->usage)) |
be6e6707 DH |
685 | __rxrpc_put_peer(peer); |
686 | } | |
17926a79 DH |
687 | |
688 | /* | |
0d81a51a | 689 | * proc.c |
17926a79 | 690 | */ |
036c2e27 JE |
691 | extern const char *const rxrpc_call_states[]; |
692 | extern const struct file_operations rxrpc_call_seq_fops; | |
693 | extern const struct file_operations rxrpc_connection_seq_fops; | |
17926a79 DH |
694 | |
695 | /* | |
0d81a51a | 696 | * recvmsg.c |
17926a79 | 697 | */ |
c1b1203d | 698 | void rxrpc_remove_user_ID(struct rxrpc_sock *, struct rxrpc_call *); |
1b784140 | 699 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
17926a79 DH |
700 | |
701 | /* | |
0d81a51a DH |
702 | * rxkad.c |
703 | */ | |
704 | #ifdef CONFIG_RXKAD | |
705 | extern const struct rxrpc_security rxkad; | |
706 | #endif | |
707 | ||
708 | /* | |
709 | * security.c | |
17926a79 | 710 | */ |
648af7fc DH |
711 | int __init rxrpc_init_security(void); |
712 | void rxrpc_exit_security(void); | |
c1b1203d JP |
713 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
714 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); | |
17926a79 DH |
715 | |
716 | /* | |
0d81a51a | 717 | * skbuff.c |
17926a79 | 718 | */ |
c1b1203d | 719 | void rxrpc_packet_destructor(struct sk_buff *); |
17926a79 | 720 | |
5873c083 DH |
721 | /* |
722 | * sysctl.c | |
723 | */ | |
724 | #ifdef CONFIG_SYSCTL | |
725 | extern int __init rxrpc_sysctl_init(void); | |
726 | extern void rxrpc_sysctl_exit(void); | |
727 | #else | |
728 | static inline int __init rxrpc_sysctl_init(void) { return 0; } | |
729 | static inline void rxrpc_sysctl_exit(void) {} | |
730 | #endif | |
731 | ||
be6e6707 DH |
732 | /* |
733 | * utils.c | |
734 | */ | |
735 | void rxrpc_get_addr_from_skb(struct rxrpc_local *, const struct sk_buff *, | |
736 | struct sockaddr_rxrpc *); | |
737 | ||
17926a79 DH |
738 | /* |
739 | * debug tracing | |
740 | */ | |
95c96174 | 741 | extern unsigned int rxrpc_debug; |
17926a79 DH |
742 | |
743 | #define dbgprintk(FMT,...) \ | |
9f389f4b | 744 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
17926a79 | 745 | |
0dc47877 HH |
746 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
747 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
17926a79 DH |
748 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
749 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) | |
750 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) | |
751 | ||
752 | ||
753 | #if defined(__KDEBUG) | |
754 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) | |
755 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) | |
756 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) | |
757 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) | |
758 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) | |
759 | ||
760 | #elif defined(CONFIG_AF_RXRPC_DEBUG) | |
761 | #define RXRPC_DEBUG_KENTER 0x01 | |
762 | #define RXRPC_DEBUG_KLEAVE 0x02 | |
763 | #define RXRPC_DEBUG_KDEBUG 0x04 | |
764 | #define RXRPC_DEBUG_KPROTO 0x08 | |
765 | #define RXRPC_DEBUG_KNET 0x10 | |
766 | ||
767 | #define _enter(FMT,...) \ | |
768 | do { \ | |
769 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ | |
770 | kenter(FMT,##__VA_ARGS__); \ | |
771 | } while (0) | |
772 | ||
773 | #define _leave(FMT,...) \ | |
774 | do { \ | |
775 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ | |
776 | kleave(FMT,##__VA_ARGS__); \ | |
777 | } while (0) | |
778 | ||
779 | #define _debug(FMT,...) \ | |
780 | do { \ | |
781 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ | |
782 | kdebug(FMT,##__VA_ARGS__); \ | |
783 | } while (0) | |
784 | ||
785 | #define _proto(FMT,...) \ | |
786 | do { \ | |
787 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ | |
788 | kproto(FMT,##__VA_ARGS__); \ | |
789 | } while (0) | |
790 | ||
791 | #define _net(FMT,...) \ | |
792 | do { \ | |
793 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ | |
794 | knet(FMT,##__VA_ARGS__); \ | |
795 | } while (0) | |
796 | ||
797 | #else | |
12fdff3f DH |
798 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
799 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) | |
800 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) | |
801 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) | |
802 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) | |
17926a79 DH |
803 | #endif |
804 | ||
805 | /* | |
806 | * debug assertion checking | |
807 | */ | |
808 | #if 1 // defined(__KDEBUGALL) | |
809 | ||
810 | #define ASSERT(X) \ | |
811 | do { \ | |
812 | if (unlikely(!(X))) { \ | |
9b6d5398 | 813 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
814 | BUG(); \ |
815 | } \ | |
b4f1342f | 816 | } while (0) |
17926a79 DH |
817 | |
818 | #define ASSERTCMP(X, OP, Y) \ | |
819 | do { \ | |
9b6d5398 JP |
820 | unsigned long _x = (unsigned long)(X); \ |
821 | unsigned long _y = (unsigned long)(Y); \ | |
822 | if (unlikely(!(_x OP _y))) { \ | |
823 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
824 | _x, _x, #OP, _y, _y); \ | |
17926a79 DH |
825 | BUG(); \ |
826 | } \ | |
b4f1342f | 827 | } while (0) |
17926a79 DH |
828 | |
829 | #define ASSERTIF(C, X) \ | |
830 | do { \ | |
831 | if (unlikely((C) && !(X))) { \ | |
9b6d5398 | 832 | pr_err("Assertion failed\n"); \ |
17926a79 DH |
833 | BUG(); \ |
834 | } \ | |
b4f1342f | 835 | } while (0) |
17926a79 DH |
836 | |
837 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
838 | do { \ | |
9b6d5398 JP |
839 | unsigned long _x = (unsigned long)(X); \ |
840 | unsigned long _y = (unsigned long)(Y); \ | |
841 | if (unlikely((C) && !(_x OP _y))) { \ | |
842 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ | |
843 | _x, _x, #OP, _y, _y); \ | |
17926a79 DH |
844 | BUG(); \ |
845 | } \ | |
b4f1342f | 846 | } while (0) |
17926a79 DH |
847 | |
848 | #else | |
849 | ||
850 | #define ASSERT(X) \ | |
851 | do { \ | |
b4f1342f | 852 | } while (0) |
17926a79 DH |
853 | |
854 | #define ASSERTCMP(X, OP, Y) \ | |
855 | do { \ | |
b4f1342f | 856 | } while (0) |
17926a79 DH |
857 | |
858 | #define ASSERTIF(C, X) \ | |
859 | do { \ | |
b4f1342f | 860 | } while (0) |
17926a79 DH |
861 | |
862 | #define ASSERTIFCMP(C, X, OP, Y) \ | |
863 | do { \ | |
b4f1342f | 864 | } while (0) |
17926a79 DH |
865 | |
866 | #endif /* __KDEBUGALL */ | |
867 | ||
868 | /* | |
869 | * socket buffer accounting / leak finding | |
870 | */ | |
871 | static inline void __rxrpc_new_skb(struct sk_buff *skb, const char *fn) | |
872 | { | |
873 | //_net("new skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
874 | //atomic_inc(&rxrpc_n_skbs); | |
875 | } | |
876 | ||
877 | #define rxrpc_new_skb(skb) __rxrpc_new_skb((skb), __func__) | |
878 | ||
879 | static inline void __rxrpc_kill_skb(struct sk_buff *skb, const char *fn) | |
880 | { | |
881 | //_net("kill skb %p %s [%d]", skb, fn, atomic_read(&rxrpc_n_skbs)); | |
882 | //atomic_dec(&rxrpc_n_skbs); | |
883 | } | |
884 | ||
885 | #define rxrpc_kill_skb(skb) __rxrpc_kill_skb((skb), __func__) | |
886 | ||
887 | static inline void __rxrpc_free_skb(struct sk_buff *skb, const char *fn) | |
888 | { | |
889 | if (skb) { | |
890 | CHECK_SLAB_OKAY(&skb->users); | |
891 | //_net("free skb %p %s [%d]", | |
892 | // skb, fn, atomic_read(&rxrpc_n_skbs)); | |
893 | //atomic_dec(&rxrpc_n_skbs); | |
894 | kfree_skb(skb); | |
895 | } | |
896 | } | |
897 | ||
898 | #define rxrpc_free_skb(skb) __rxrpc_free_skb((skb), __func__) | |
899 | ||
900 | static inline void rxrpc_purge_queue(struct sk_buff_head *list) | |
901 | { | |
902 | struct sk_buff *skb; | |
903 | while ((skb = skb_dequeue((list))) != NULL) | |
904 | rxrpc_free_skb(skb); | |
905 | } | |
906 | ||
17926a79 DH |
907 | #define rxrpc_get_call(CALL) \ |
908 | do { \ | |
909 | CHECK_SLAB_OKAY(&(CALL)->usage); \ | |
910 | if (atomic_inc_return(&(CALL)->usage) == 1) \ | |
911 | BUG(); \ | |
b4f1342f | 912 | } while (0) |
17926a79 DH |
913 | |
914 | #define rxrpc_put_call(CALL) \ | |
915 | do { \ | |
916 | __rxrpc_put_call(CALL); \ | |
b4f1342f | 917 | } while (0) |