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