David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 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 | |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 12 | #include <linux/atomic.h> |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 13 | #include <linux/seqlock.h> |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 14 | #include <net/sock.h> |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 15 | #include <net/af_rxrpc.h> |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 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 |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 23 | #define CHECK_SLAB_OKAY(X) do {} while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 24 | #endif |
| 25 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 26 | #define FCRYPT_BSIZE 8 |
| 27 | struct rxrpc_crypt { |
| 28 | union { |
| 29 | u8 x[FCRYPT_BSIZE]; |
Al Viro | 91e916c | 2008-03-29 03:08:38 +0000 | [diff] [blame] | 30 | __be32 n[2]; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 31 | }; |
| 32 | } __attribute__((aligned(8))); |
| 33 | |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 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 | |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 38 | struct rxrpc_connection; |
| 39 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 40 | /* |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 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 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 55 | * sk_state for RxRPC sockets |
| 56 | */ |
| 57 | enum { |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 58 | RXRPC_UNBOUND = 0, |
| 59 | RXRPC_CLIENT_UNBOUND, /* Unbound socket used as client */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 60 | RXRPC_CLIENT_BOUND, /* client local address bound */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 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 | /* |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 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 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 88 | * RxRPC socket definition |
| 89 | */ |
| 90 | struct rxrpc_sock { |
| 91 | /* WARNING: sk has to be the first member */ |
| 92 | struct sock sk; |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 93 | rxrpc_notify_new_call_t notify_new_call; /* Func to notify of new call */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 94 | rxrpc_discard_new_call_t discard_new_call; /* Func to discard a new call */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 95 | struct rxrpc_local *local; /* local endpoint */ |
David Howells | de8d6c7 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 96 | struct hlist_node listen_link; /* link in the local endpoint's listen list */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 97 | struct rxrpc_backlog *backlog; /* Preallocation for services */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 98 | spinlock_t incoming_lock; /* Incoming call vs service shutdown lock */ |
| 99 | struct list_head sock_calls; /* List of calls owned by this socket */ |
| 100 | struct list_head to_be_accepted; /* calls awaiting acceptance */ |
| 101 | struct list_head recvmsg_q; /* Calls awaiting recvmsg's attention */ |
| 102 | rwlock_t recvmsg_lock; /* Lock for recvmsg_q */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 103 | struct key *key; /* security for this socket */ |
| 104 | struct key *securities; /* list of server security descriptors */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 105 | struct rb_root calls; /* User ID -> call mapping */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 106 | unsigned long flags; |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 107 | #define RXRPC_SOCK_CONNECTED 0 /* connect_srx is set */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 108 | rwlock_t call_lock; /* lock for calls */ |
| 109 | u32 min_sec_level; /* minimum security level */ |
| 110 | #define RXRPC_SECURITY_MAX RXRPC_SECURITY_ENCRYPT |
David Howells | cc8feb8 | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 111 | bool exclusive; /* Exclusive connection for a client socket */ |
| 112 | sa_family_t family; /* Protocol family created with */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 113 | struct sockaddr_rxrpc srx; /* local address */ |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 114 | struct sockaddr_rxrpc connect_srx; /* Default client address from connect() */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 115 | }; |
| 116 | |
| 117 | #define rxrpc_sk(__sk) container_of((__sk), struct rxrpc_sock, sk) |
| 118 | |
| 119 | /* |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 120 | * CPU-byteorder normalised Rx packet header. |
| 121 | */ |
| 122 | struct rxrpc_host_header { |
| 123 | u32 epoch; /* client boot timestamp */ |
| 124 | u32 cid; /* connection and channel ID */ |
| 125 | u32 callNumber; /* call ID (0 for connection-level packets) */ |
| 126 | u32 seq; /* sequence number of pkt in call stream */ |
| 127 | u32 serial; /* serial number of pkt sent to network */ |
| 128 | u8 type; /* packet type */ |
| 129 | u8 flags; /* packet flags */ |
| 130 | u8 userStatus; /* app-layer defined status */ |
| 131 | u8 securityIndex; /* security protocol ID */ |
| 132 | union { |
| 133 | u16 _rsvd; /* reserved */ |
| 134 | u16 cksum; /* kerberos security checksum */ |
| 135 | }; |
| 136 | u16 serviceId; /* service ID */ |
| 137 | } __packed; |
| 138 | |
| 139 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 140 | * RxRPC socket buffer private variables |
| 141 | * - max 48 bytes (struct sk_buff::cb) |
| 142 | */ |
| 143 | struct rxrpc_skb_priv { |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 144 | union { |
| 145 | unsigned long resend_at; /* time in jiffies at which to resend */ |
| 146 | struct { |
| 147 | u8 nr_jumbo; /* Number of jumbo subpackets */ |
| 148 | }; |
| 149 | }; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 150 | union { |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 151 | unsigned int offset; /* offset into buffer of next read */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 152 | int remain; /* amount of space remaining for next write */ |
| 153 | u32 error; /* network error code */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 154 | }; |
| 155 | |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 156 | struct rxrpc_host_header hdr; /* RxRPC packet header from this packet */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 157 | }; |
| 158 | |
| 159 | #define rxrpc_skb(__skb) ((struct rxrpc_skb_priv *) &(__skb)->cb) |
| 160 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 161 | /* |
| 162 | * RxRPC security module interface |
| 163 | */ |
| 164 | struct rxrpc_security { |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 165 | const char *name; /* name of this service */ |
| 166 | u8 security_index; /* security type provided */ |
| 167 | |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 168 | /* Initialise a security service */ |
| 169 | int (*init)(void); |
| 170 | |
| 171 | /* Clean up a security service */ |
| 172 | void (*exit)(void); |
| 173 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 174 | /* initialise a connection's security */ |
| 175 | int (*init_connection_security)(struct rxrpc_connection *); |
| 176 | |
| 177 | /* prime a connection's packet security */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 178 | int (*prime_packet_security)(struct rxrpc_connection *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 179 | |
| 180 | /* impose security on a packet */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 181 | int (*secure_packet)(struct rxrpc_call *, |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 182 | struct sk_buff *, |
| 183 | size_t, |
| 184 | void *); |
| 185 | |
| 186 | /* verify the security on a received packet */ |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 187 | int (*verify_packet)(struct rxrpc_call *, struct sk_buff *, |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 188 | unsigned int, unsigned int, rxrpc_seq_t, u16); |
| 189 | |
| 190 | /* Locate the data in a received packet that has been verified. */ |
| 191 | void (*locate_data)(struct rxrpc_call *, struct sk_buff *, |
| 192 | unsigned int *, unsigned int *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 193 | |
| 194 | /* issue a challenge */ |
| 195 | int (*issue_challenge)(struct rxrpc_connection *); |
| 196 | |
| 197 | /* respond to a challenge */ |
| 198 | int (*respond_to_challenge)(struct rxrpc_connection *, |
| 199 | struct sk_buff *, |
| 200 | u32 *); |
| 201 | |
| 202 | /* verify a response */ |
| 203 | int (*verify_response)(struct rxrpc_connection *, |
| 204 | struct sk_buff *, |
| 205 | u32 *); |
| 206 | |
| 207 | /* clear connection security */ |
| 208 | void (*clear)(struct rxrpc_connection *); |
| 209 | }; |
| 210 | |
| 211 | /* |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 212 | * RxRPC local transport endpoint description |
| 213 | * - owned by a single AF_RXRPC socket |
| 214 | * - pointed to by transport socket struct sk_user_data |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 215 | */ |
| 216 | struct rxrpc_local { |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 217 | struct rcu_head rcu; |
| 218 | atomic_t usage; |
| 219 | struct list_head link; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 220 | struct socket *socket; /* my UDP socket */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 221 | struct work_struct processor; |
David Howells | de8d6c7 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 222 | struct hlist_head services; /* services listening on this endpoint */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 223 | struct rw_semaphore defrag_sem; /* control re-enablement of IP DF bit */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 224 | struct sk_buff_head reject_queue; /* packets awaiting rejection */ |
David Howells | 44ba069 | 2015-04-01 16:31:26 +0100 | [diff] [blame] | 225 | struct sk_buff_head event_queue; /* endpoint event packets awaiting processing */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 226 | struct rb_root client_conns; /* Client connections by socket params */ |
| 227 | spinlock_t client_conns_lock; /* Lock for client_conns */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 228 | spinlock_t lock; /* access lock */ |
| 229 | rwlock_t services_lock; /* lock for services list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 230 | int debug_id; /* debug ID for printks */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 231 | bool dead; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 232 | struct sockaddr_rxrpc srx; /* local address */ |
| 233 | }; |
| 234 | |
| 235 | /* |
| 236 | * RxRPC remote transport endpoint definition |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 237 | * - matched by local endpoint, remote port, address and protocol type |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 238 | */ |
| 239 | struct rxrpc_peer { |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 240 | struct rcu_head rcu; /* This must be first */ |
| 241 | atomic_t usage; |
| 242 | unsigned long hash_key; |
| 243 | struct hlist_node hash_link; |
| 244 | struct rxrpc_local *local; |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 245 | struct hlist_head error_targets; /* targets for net error distribution */ |
| 246 | struct work_struct error_distributor; |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 247 | struct rb_root service_conns; /* Service connections */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 248 | seqlock_t service_conn_lock; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 249 | spinlock_t lock; /* access lock */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 250 | unsigned int if_mtu; /* interface MTU for this peer */ |
| 251 | unsigned int mtu; /* network MTU for this peer */ |
| 252 | unsigned int maxdata; /* data size (MTU - hdrsize) */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 253 | unsigned short hdrsize; /* header size (IP + UDP + RxRPC) */ |
| 254 | int debug_id; /* debug ID for printks */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 255 | int error_report; /* Net (+0) or local (+1000000) to distribute */ |
| 256 | #define RXRPC_LOCAL_ERROR_OFFSET 1000000 |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 257 | struct sockaddr_rxrpc srx; /* remote address */ |
| 258 | |
| 259 | /* calculated RTT cache */ |
| 260 | #define RXRPC_RTT_CACHE_SIZE 32 |
| 261 | suseconds_t rtt; /* current RTT estimate (in uS) */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 262 | unsigned int rtt_point; /* next entry at which to insert */ |
| 263 | unsigned int rtt_usage; /* amount of cache actually used */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 264 | suseconds_t rtt_cache[RXRPC_RTT_CACHE_SIZE]; /* calculated RTT cache */ |
| 265 | }; |
| 266 | |
| 267 | /* |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 268 | * Keys for matching a connection. |
| 269 | */ |
| 270 | struct rxrpc_conn_proto { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 271 | union { |
| 272 | struct { |
| 273 | u32 epoch; /* epoch of this connection */ |
| 274 | u32 cid; /* connection ID */ |
| 275 | }; |
| 276 | u64 index_key; |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 277 | }; |
| 278 | }; |
| 279 | |
| 280 | struct rxrpc_conn_parameters { |
| 281 | struct rxrpc_local *local; /* Representation of local endpoint */ |
| 282 | struct rxrpc_peer *peer; /* Remote endpoint */ |
| 283 | struct key *key; /* Security details */ |
| 284 | bool exclusive; /* T if conn is exclusive */ |
| 285 | u16 service_id; /* Service ID for this connection */ |
| 286 | u32 security_level; /* Security level selected */ |
| 287 | }; |
| 288 | |
| 289 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 290 | * Bits in the connection flags. |
| 291 | */ |
| 292 | enum rxrpc_conn_flag { |
| 293 | RXRPC_CONN_HAS_IDR, /* Has a client conn ID assigned */ |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 294 | RXRPC_CONN_IN_SERVICE_CONNS, /* Conn is in peer->service_conns */ |
| 295 | RXRPC_CONN_IN_CLIENT_CONNS, /* Conn is in local->client_conns */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 296 | RXRPC_CONN_EXPOSED, /* Conn has extra ref for exposure */ |
| 297 | RXRPC_CONN_DONT_REUSE, /* Don't reuse this connection */ |
| 298 | RXRPC_CONN_COUNTED, /* Counted by rxrpc_nr_client_conns */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 299 | }; |
| 300 | |
| 301 | /* |
| 302 | * Events that can be raised upon a connection. |
| 303 | */ |
| 304 | enum rxrpc_conn_event { |
| 305 | RXRPC_CONN_EV_CHALLENGE, /* Send challenge packet */ |
| 306 | }; |
| 307 | |
| 308 | /* |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 309 | * The connection cache state. |
| 310 | */ |
| 311 | enum rxrpc_conn_cache_state { |
| 312 | RXRPC_CONN_CLIENT_INACTIVE, /* Conn is not yet listed */ |
| 313 | RXRPC_CONN_CLIENT_WAITING, /* Conn is on wait list, waiting for capacity */ |
| 314 | RXRPC_CONN_CLIENT_ACTIVE, /* Conn is on active list, doing calls */ |
| 315 | RXRPC_CONN_CLIENT_CULLED, /* Conn is culled and delisted, doing calls */ |
| 316 | RXRPC_CONN_CLIENT_IDLE, /* Conn is on idle list, doing mostly nothing */ |
| 317 | }; |
| 318 | |
| 319 | /* |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 320 | * The connection protocol state. |
| 321 | */ |
| 322 | enum rxrpc_conn_proto_state { |
| 323 | RXRPC_CONN_UNUSED, /* Connection not yet attempted */ |
| 324 | RXRPC_CONN_CLIENT, /* Client connection */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 325 | RXRPC_CONN_SERVICE_PREALLOC, /* Service connection preallocation */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 326 | RXRPC_CONN_SERVICE_UNSECURED, /* Service unsecured connection */ |
| 327 | RXRPC_CONN_SERVICE_CHALLENGING, /* Service challenging for security */ |
| 328 | RXRPC_CONN_SERVICE, /* Service secured connection */ |
| 329 | RXRPC_CONN_REMOTELY_ABORTED, /* Conn aborted by peer */ |
| 330 | RXRPC_CONN_LOCALLY_ABORTED, /* Conn aborted locally */ |
David Howells | bba304d | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 331 | RXRPC_CONN__NR_STATES |
| 332 | }; |
| 333 | |
| 334 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 335 | * RxRPC connection definition |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 336 | * - matched by { local, peer, epoch, conn_id, direction } |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 337 | * - each connection can only handle four simultaneous calls |
| 338 | */ |
| 339 | struct rxrpc_connection { |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 340 | struct rxrpc_conn_proto proto; |
| 341 | struct rxrpc_conn_parameters params; |
| 342 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 343 | atomic_t usage; |
| 344 | struct rcu_head rcu; |
| 345 | struct list_head cache_link; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 346 | |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 347 | spinlock_t channel_lock; |
| 348 | unsigned char active_chans; /* Mask of active channels */ |
| 349 | #define RXRPC_ACTIVE_CHANS_MASK ((1 << RXRPC_MAXCALLS) - 1) |
| 350 | struct list_head waiting_calls; /* Calls waiting for channels */ |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 351 | struct rxrpc_channel { |
| 352 | struct rxrpc_call __rcu *call; /* Active call */ |
| 353 | u32 call_id; /* ID of current call */ |
| 354 | u32 call_counter; /* Call ID counter */ |
| 355 | u32 last_call; /* ID of last call */ |
David Howells | 18bfeba | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 356 | u8 last_type; /* Type of last packet */ |
| 357 | u16 last_service_id; |
| 358 | union { |
| 359 | u32 last_seq; |
| 360 | u32 last_abort; |
| 361 | }; |
David Howells | a1399f8 | 2016-06-27 14:39:44 +0100 | [diff] [blame] | 362 | } channels[RXRPC_MAXCALLS]; |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 363 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 364 | struct work_struct processor; /* connection event processor */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 365 | union { |
| 366 | struct rb_node client_node; /* Node in local->client_conns */ |
David Howells | aa390bb | 2016-06-17 10:06:56 +0100 | [diff] [blame] | 367 | struct rb_node service_node; /* Node in peer->service_conns */ |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 368 | }; |
David Howells | 4d028b2 | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 369 | struct list_head proc_link; /* link in procfs list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 370 | struct list_head link; /* link in master connection list */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 371 | struct sk_buff_head rx_queue; /* received conn-level packets */ |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 372 | const struct rxrpc_security *security; /* applied security module */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 373 | struct key *server_key; /* security for this service */ |
Herbert Xu | 1afe593 | 2016-01-24 21:19:01 +0800 | [diff] [blame] | 374 | struct crypto_skcipher *cipher; /* encryption handle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 375 | struct rxrpc_crypt csum_iv; /* packet checksum base */ |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 376 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 377 | unsigned long events; |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 378 | unsigned long idle_timestamp; /* Time at which last became idle */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 379 | spinlock_t state_lock; /* state-change lock */ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 380 | enum rxrpc_conn_cache_state cache_state; |
| 381 | enum rxrpc_conn_proto_state state; /* current state of connection */ |
David Howells | dc44b3a | 2016-04-07 17:23:30 +0100 | [diff] [blame] | 382 | u32 local_abort; /* local abort code */ |
| 383 | u32 remote_abort; /* remote abort code */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 384 | int debug_id; /* debug ID for printks */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 385 | atomic_t serial; /* packet serial number counter */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 386 | unsigned int hi_serial; /* highest serial number received */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 387 | u8 size_align; /* data size alignment (for security) */ |
| 388 | u8 header_size; /* rxrpc + security header size */ |
| 389 | u8 security_size; /* security header size */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 390 | u32 security_nonce; /* response re-use preventer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 391 | u8 security_ix; /* security type */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 392 | u8 out_clientflag; /* RXRPC_CLIENT_INITIATED if we are client */ |
| 393 | }; |
| 394 | |
| 395 | /* |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 396 | * Flags in call->flags. |
| 397 | */ |
| 398 | enum rxrpc_call_flag { |
| 399 | RXRPC_CALL_RELEASED, /* call has been released - no more message to userspace */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 400 | RXRPC_CALL_HAS_USERID, /* has a user ID attached */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 401 | RXRPC_CALL_IS_SERVICE, /* Call is service call */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 402 | RXRPC_CALL_EXPOSED, /* The call was exposed to the world */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 403 | RXRPC_CALL_RX_LAST, /* Received the last packet (at rxtx_top) */ |
| 404 | RXRPC_CALL_TX_LAST, /* Last packet in Tx buffer (at rxtx_top) */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 405 | }; |
| 406 | |
| 407 | /* |
| 408 | * Events that can be raised on a call. |
| 409 | */ |
| 410 | enum rxrpc_call_event { |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 411 | RXRPC_CALL_EV_ACK, /* need to generate ACK */ |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 412 | RXRPC_CALL_EV_ABORT, /* need to generate abort */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 413 | RXRPC_CALL_EV_TIMER, /* Timer expired */ |
David Howells | 4c198ad | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 414 | RXRPC_CALL_EV_RESEND, /* Tx resend required */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 415 | }; |
| 416 | |
| 417 | /* |
| 418 | * The states that a call can be in. |
| 419 | */ |
| 420 | enum rxrpc_call_state { |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 421 | RXRPC_CALL_UNINITIALISED, |
| 422 | RXRPC_CALL_CLIENT_AWAIT_CONN, /* - client waiting for connection to become available */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 423 | RXRPC_CALL_CLIENT_SEND_REQUEST, /* - client sending request phase */ |
| 424 | RXRPC_CALL_CLIENT_AWAIT_REPLY, /* - client awaiting reply */ |
| 425 | RXRPC_CALL_CLIENT_RECV_REPLY, /* - client receiving reply phase */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 426 | RXRPC_CALL_SERVER_PREALLOC, /* - service preallocation */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 427 | RXRPC_CALL_SERVER_SECURING, /* - server securing request connection */ |
| 428 | RXRPC_CALL_SERVER_ACCEPTING, /* - server accepting request */ |
| 429 | RXRPC_CALL_SERVER_RECV_REQUEST, /* - server receiving request */ |
| 430 | RXRPC_CALL_SERVER_ACK_REQUEST, /* - server pending ACK of request */ |
| 431 | RXRPC_CALL_SERVER_SEND_REPLY, /* - server sending reply */ |
| 432 | RXRPC_CALL_SERVER_AWAIT_ACK, /* - server awaiting final ACK */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 433 | RXRPC_CALL_COMPLETE, /* - call complete */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 434 | NR__RXRPC_CALL_STATES |
| 435 | }; |
| 436 | |
| 437 | /* |
| 438 | * Call completion condition (state == RXRPC_CALL_COMPLETE). |
| 439 | */ |
| 440 | enum rxrpc_call_completion { |
| 441 | RXRPC_CALL_SUCCEEDED, /* - Normal termination */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 442 | RXRPC_CALL_REMOTELY_ABORTED, /* - call aborted by peer */ |
| 443 | RXRPC_CALL_LOCALLY_ABORTED, /* - call aborted locally on error or close */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 444 | RXRPC_CALL_LOCAL_ERROR, /* - call failed due to local error */ |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 445 | RXRPC_CALL_NETWORK_ERROR, /* - call terminated by network error */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 446 | NR__RXRPC_CALL_COMPLETIONS |
David Howells | 5b8848d | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 447 | }; |
| 448 | |
| 449 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 450 | * RxRPC call definition |
| 451 | * - matched by { connection, call_id } |
| 452 | */ |
| 453 | struct rxrpc_call { |
David Howells | dee4636 | 2016-06-27 17:11:19 +0100 | [diff] [blame] | 454 | struct rcu_head rcu; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 455 | struct rxrpc_connection *conn; /* connection carrying call */ |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 456 | struct rxrpc_peer *peer; /* Peer record for remote address */ |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 457 | struct rxrpc_sock __rcu *socket; /* socket responsible */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 458 | unsigned long ack_at; /* When deferred ACK needs to happen */ |
| 459 | unsigned long resend_at; /* When next resend needs to happen */ |
| 460 | unsigned long expire_at; /* When the call times out */ |
| 461 | struct timer_list timer; /* Combined event timer */ |
| 462 | struct work_struct processor; /* Event processor */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 463 | rxrpc_notify_rx_t notify_rx; /* kernel service Rx notification function */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 464 | struct list_head link; /* link in master call list */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 465 | struct list_head chan_wait_link; /* Link in conn->waiting_calls */ |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 466 | struct hlist_node error_link; /* link in error distribution list */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 467 | struct list_head accept_link; /* Link in rx->acceptq */ |
| 468 | struct list_head recvmsg_link; /* Link in rx->recvmsg_q */ |
| 469 | struct list_head sock_link; /* Link in rx->sock_calls */ |
| 470 | struct rb_node sock_node; /* Node in rx->calls */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 471 | struct sk_buff *tx_pending; /* Tx socket buffer being filled */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 472 | wait_queue_head_t waitq; /* Wait queue for channel or Tx */ |
Herbert Xu | a263629 | 2016-06-26 14:55:24 -0700 | [diff] [blame] | 473 | __be32 crypto_buf[2]; /* Temporary packet crypto buffer */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 474 | unsigned long user_call_ID; /* user-defined call ID */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 475 | unsigned long flags; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 476 | unsigned long events; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 477 | spinlock_t lock; |
| 478 | rwlock_t state_lock; /* lock for state transition */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 479 | u32 abort_code; /* Local/remote abort code */ |
| 480 | int error; /* Local error incurred */ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 481 | enum rxrpc_call_state state; /* current state of call */ |
| 482 | enum rxrpc_call_completion completion; /* Call completion condition */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 483 | atomic_t usage; |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 484 | u16 service_id; /* service ID */ |
David Howells | 278ac0c | 2016-09-07 15:19:25 +0100 | [diff] [blame] | 485 | u8 security_ix; /* Security type */ |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 486 | u32 call_id; /* call ID on connection */ |
| 487 | u32 cid; /* connection ID plus channel index */ |
| 488 | int debug_id; /* debug ID for printks */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 489 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 490 | /* Rx/Tx circular buffer, depending on phase. |
| 491 | * |
| 492 | * In the Rx phase, packets are annotated with 0 or the number of the |
| 493 | * segment of a jumbo packet each buffer refers to. There can be up to |
| 494 | * 47 segments in a maximum-size UDP packet. |
| 495 | * |
| 496 | * In the Tx phase, packets are annotated with which buffers have been |
| 497 | * acked. |
| 498 | */ |
| 499 | #define RXRPC_RXTX_BUFF_SIZE 64 |
| 500 | #define RXRPC_RXTX_BUFF_MASK (RXRPC_RXTX_BUFF_SIZE - 1) |
David Howells | 75e4212 | 2016-09-13 22:36:22 +0100 | [diff] [blame] | 501 | #define RXRPC_INIT_RX_WINDOW_SIZE 32 |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 502 | struct sk_buff **rxtx_buffer; |
| 503 | u8 *rxtx_annotations; |
| 504 | #define RXRPC_TX_ANNO_ACK 0 |
| 505 | #define RXRPC_TX_ANNO_UNACK 1 |
| 506 | #define RXRPC_TX_ANNO_NAK 2 |
| 507 | #define RXRPC_TX_ANNO_RETRANS 3 |
| 508 | #define RXRPC_RX_ANNO_JUMBO 0x3f /* Jumbo subpacket number + 1 if not zero */ |
| 509 | #define RXRPC_RX_ANNO_JLAST 0x40 /* Set if last element of a jumbo packet */ |
| 510 | #define RXRPC_RX_ANNO_VERIFIED 0x80 /* Set if verified and decrypted */ |
| 511 | rxrpc_seq_t tx_hard_ack; /* Dead slot in buffer; the first transmitted but |
| 512 | * not hard-ACK'd packet follows this. |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 513 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 514 | rxrpc_seq_t tx_top; /* Highest Tx slot allocated. */ |
| 515 | rxrpc_seq_t rx_hard_ack; /* Dead slot in buffer; the first received but not |
| 516 | * consumed packet follows this. |
| 517 | */ |
| 518 | rxrpc_seq_t rx_top; /* Highest Rx slot allocated. */ |
| 519 | rxrpc_seq_t rx_expect_next; /* Expected next packet sequence number */ |
| 520 | u8 rx_winsize; /* Size of Rx window */ |
| 521 | u8 tx_winsize; /* Maximum size of Tx window */ |
David Howells | 75e4212 | 2016-09-13 22:36:22 +0100 | [diff] [blame] | 522 | u8 nr_jumbo_bad; /* Number of jumbo dups/exceeds-windows */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 523 | |
| 524 | /* receive-phase ACK management */ |
David Howells | 4e36a95 | 2009-09-16 00:01:13 -0700 | [diff] [blame] | 525 | u8 ackr_reason; /* reason to ACK */ |
David Howells | 563ea7d | 2016-08-23 15:27:25 +0100 | [diff] [blame] | 526 | u16 ackr_skew; /* skew on packet being ACK'd */ |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 527 | rxrpc_serial_t ackr_serial; /* serial of packet being ACK'd */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 528 | rxrpc_seq_t ackr_prev_seq; /* previous sequence number received */ |
| 529 | unsigned short rx_pkt_offset; /* Current recvmsg packet offset */ |
| 530 | unsigned short rx_pkt_len; /* Current recvmsg packet len */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 531 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 532 | /* transmission-phase ACK management */ |
| 533 | rxrpc_serial_t acks_latest; /* serial number of latest ACK received */ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 534 | }; |
| 535 | |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 536 | enum rxrpc_call_trace { |
| 537 | rxrpc_call_new_client, |
| 538 | rxrpc_call_new_service, |
| 539 | rxrpc_call_queued, |
| 540 | rxrpc_call_queued_ref, |
| 541 | rxrpc_call_seen, |
| 542 | rxrpc_call_got, |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 543 | rxrpc_call_got_userid, |
David Howells | cbd0089 | 2016-09-13 09:12:34 +0100 | [diff] [blame] | 544 | rxrpc_call_got_kernel, |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 545 | rxrpc_call_put, |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 546 | rxrpc_call_put_userid, |
David Howells | cbd0089 | 2016-09-13 09:12:34 +0100 | [diff] [blame] | 547 | rxrpc_call_put_kernel, |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 548 | rxrpc_call_put_noqueue, |
| 549 | rxrpc_call__nr_trace |
| 550 | }; |
| 551 | |
| 552 | extern const char rxrpc_call_traces[rxrpc_call__nr_trace][4]; |
| 553 | |
David Howells | a3868bf | 2016-09-17 10:49:13 +0100 | [diff] [blame^] | 554 | extern const char *const rxrpc_pkts[]; |
| 555 | extern const char *rxrpc_acks(u8 reason); |
| 556 | |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 557 | #include <trace/events/rxrpc.h> |
| 558 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 559 | /* |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 560 | * af_rxrpc.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 561 | */ |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 562 | extern atomic_t rxrpc_n_skbs; |
David Howells | 0d12f8a | 2016-03-04 15:53:46 +0000 | [diff] [blame] | 563 | extern u32 rxrpc_epoch; |
David Howells | 651350d | 2007-04-26 15:50:17 -0700 | [diff] [blame] | 564 | extern atomic_t rxrpc_debug_id; |
| 565 | extern struct workqueue_struct *rxrpc_workqueue; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 566 | |
| 567 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 568 | * call_accept.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 569 | */ |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 570 | int rxrpc_service_prealloc(struct rxrpc_sock *, gfp_t); |
| 571 | void rxrpc_discard_prealloc(struct rxrpc_sock *); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 572 | struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *, |
| 573 | struct rxrpc_connection *, |
| 574 | struct sk_buff *); |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 575 | void rxrpc_accept_incoming_calls(struct rxrpc_local *); |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 576 | struct rxrpc_call *rxrpc_accept_call(struct rxrpc_sock *, unsigned long, |
| 577 | rxrpc_notify_rx_t); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 578 | int rxrpc_reject_call(struct rxrpc_sock *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 579 | |
| 580 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 581 | * call_event.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 582 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 583 | void rxrpc_propose_ACK(struct rxrpc_call *, u8, u16, u32, bool, bool); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 584 | void rxrpc_process_call(struct work_struct *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 585 | |
| 586 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 587 | * call_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 588 | */ |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 589 | extern const char *const rxrpc_call_states[]; |
| 590 | extern const char *const rxrpc_call_completions[]; |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 591 | extern unsigned int rxrpc_max_call_lifetime; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 592 | extern struct kmem_cache *rxrpc_call_jar; |
| 593 | extern struct list_head rxrpc_calls; |
| 594 | extern rwlock_t rxrpc_call_lock; |
| 595 | |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 596 | struct rxrpc_call *rxrpc_find_call_by_user_ID(struct rxrpc_sock *, unsigned long); |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 597 | struct rxrpc_call *rxrpc_alloc_call(gfp_t); |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 598 | struct rxrpc_call *rxrpc_new_client_call(struct rxrpc_sock *, |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 599 | struct rxrpc_conn_parameters *, |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 600 | struct sockaddr_rxrpc *, |
David Howells | 2341e07 | 2016-06-09 23:02:51 +0100 | [diff] [blame] | 601 | unsigned long, gfp_t); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 602 | void rxrpc_incoming_call(struct rxrpc_sock *, struct rxrpc_call *, |
| 603 | struct sk_buff *); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 604 | void rxrpc_release_call(struct rxrpc_sock *, struct rxrpc_call *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 605 | void rxrpc_release_calls_on_socket(struct rxrpc_sock *); |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 606 | bool __rxrpc_queue_call(struct rxrpc_call *); |
| 607 | bool rxrpc_queue_call(struct rxrpc_call *); |
David Howells | e34d423 | 2016-08-30 09:49:29 +0100 | [diff] [blame] | 608 | void rxrpc_see_call(struct rxrpc_call *); |
David Howells | fff7242 | 2016-09-07 14:34:21 +0100 | [diff] [blame] | 609 | void rxrpc_get_call(struct rxrpc_call *, enum rxrpc_call_trace); |
| 610 | void rxrpc_put_call(struct rxrpc_call *, enum rxrpc_call_trace); |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 611 | void rxrpc_cleanup_call(struct rxrpc_call *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 612 | void __exit rxrpc_destroy_all_calls(void); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 613 | |
David Howells | dabe5a7 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 614 | static inline bool rxrpc_is_service_call(const struct rxrpc_call *call) |
| 615 | { |
| 616 | return test_bit(RXRPC_CALL_IS_SERVICE, &call->flags); |
| 617 | } |
| 618 | |
| 619 | static inline bool rxrpc_is_client_call(const struct rxrpc_call *call) |
| 620 | { |
| 621 | return !rxrpc_is_service_call(call); |
| 622 | } |
| 623 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 624 | /* |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 625 | * Transition a call to the complete state. |
| 626 | */ |
| 627 | static inline bool __rxrpc_set_call_completion(struct rxrpc_call *call, |
| 628 | enum rxrpc_call_completion compl, |
| 629 | u32 abort_code, |
| 630 | int error) |
| 631 | { |
| 632 | if (call->state < RXRPC_CALL_COMPLETE) { |
| 633 | call->abort_code = abort_code; |
| 634 | call->error = error; |
| 635 | call->completion = compl, |
| 636 | call->state = RXRPC_CALL_COMPLETE; |
| 637 | return true; |
| 638 | } |
| 639 | return false; |
| 640 | } |
| 641 | |
| 642 | static inline bool rxrpc_set_call_completion(struct rxrpc_call *call, |
| 643 | enum rxrpc_call_completion compl, |
| 644 | u32 abort_code, |
| 645 | int error) |
| 646 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 647 | bool ret; |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 648 | |
| 649 | write_lock_bh(&call->state_lock); |
| 650 | ret = __rxrpc_set_call_completion(call, compl, abort_code, error); |
| 651 | write_unlock_bh(&call->state_lock); |
| 652 | return ret; |
| 653 | } |
| 654 | |
| 655 | /* |
| 656 | * Record that a call successfully completed. |
| 657 | */ |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 658 | static inline bool __rxrpc_call_completed(struct rxrpc_call *call) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 659 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 660 | return __rxrpc_set_call_completion(call, RXRPC_CALL_SUCCEEDED, 0, 0); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 661 | } |
| 662 | |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 663 | static inline bool rxrpc_call_completed(struct rxrpc_call *call) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 664 | { |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 665 | bool ret; |
| 666 | |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 667 | write_lock_bh(&call->state_lock); |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 668 | ret = __rxrpc_call_completed(call); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 669 | write_unlock_bh(&call->state_lock); |
David Howells | e8d6bbb | 2016-09-07 16:34:12 +0100 | [diff] [blame] | 670 | return ret; |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 671 | } |
| 672 | |
| 673 | /* |
| 674 | * Record that a call is locally aborted. |
| 675 | */ |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 676 | static inline bool __rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
| 677 | rxrpc_seq_t seq, |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 678 | u32 abort_code, int error) |
| 679 | { |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 680 | trace_rxrpc_abort(why, call->cid, call->call_id, seq, |
| 681 | abort_code, error); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 682 | return __rxrpc_set_call_completion(call, RXRPC_CALL_LOCALLY_ABORTED, |
| 683 | abort_code, error); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 684 | } |
| 685 | |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 686 | static inline bool rxrpc_abort_call(const char *why, struct rxrpc_call *call, |
| 687 | rxrpc_seq_t seq, u32 abort_code, int error) |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 688 | { |
| 689 | bool ret; |
| 690 | |
| 691 | write_lock_bh(&call->state_lock); |
David Howells | 5a42976 | 2016-09-06 22:19:51 +0100 | [diff] [blame] | 692 | ret = __rxrpc_abort_call(why, call, seq, abort_code, error); |
David Howells | f5c17aa | 2016-08-30 09:49:28 +0100 | [diff] [blame] | 693 | write_unlock_bh(&call->state_lock); |
| 694 | return ret; |
| 695 | } |
| 696 | |
| 697 | /* |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 698 | * conn_client.c |
| 699 | */ |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 700 | extern unsigned int rxrpc_max_client_connections; |
| 701 | extern unsigned int rxrpc_reap_client_connections; |
| 702 | extern unsigned int rxrpc_conn_idle_client_expiry; |
| 703 | extern unsigned int rxrpc_conn_idle_client_fast_expiry; |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 704 | extern struct idr rxrpc_client_conn_ids; |
| 705 | |
David Howells | eb9b9d2 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 706 | void rxrpc_destroy_client_conn_ids(void); |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 707 | int rxrpc_connect_call(struct rxrpc_call *, struct rxrpc_conn_parameters *, |
| 708 | struct sockaddr_rxrpc *, gfp_t); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 709 | void rxrpc_expose_client_call(struct rxrpc_call *); |
| 710 | void rxrpc_disconnect_client_call(struct rxrpc_call *); |
| 711 | void rxrpc_put_client_conn(struct rxrpc_connection *); |
| 712 | void __exit rxrpc_destroy_all_client_connections(void); |
David Howells | 4a3388c | 2016-04-04 14:00:37 +0100 | [diff] [blame] | 713 | |
| 714 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 715 | * conn_event.c |
| 716 | */ |
| 717 | void rxrpc_process_connection(struct work_struct *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 718 | |
| 719 | /* |
| 720 | * conn_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 721 | */ |
David Howells | dad8aff | 2016-03-09 23:22:56 +0000 | [diff] [blame] | 722 | extern unsigned int rxrpc_connection_expiry; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 723 | extern struct list_head rxrpc_connections; |
David Howells | 4d028b2 | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 724 | extern struct list_head rxrpc_connection_proc_list; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 725 | extern rwlock_t rxrpc_connection_lock; |
| 726 | |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 727 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
David Howells | c6d2b8d | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 728 | struct rxrpc_connection *rxrpc_alloc_connection(gfp_t); |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 729 | struct rxrpc_connection *rxrpc_find_connection_rcu(struct rxrpc_local *, |
| 730 | struct sk_buff *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 731 | void __rxrpc_disconnect_call(struct rxrpc_connection *, struct rxrpc_call *); |
David Howells | 999b69f | 2016-06-17 15:42:35 +0100 | [diff] [blame] | 732 | void rxrpc_disconnect_call(struct rxrpc_call *); |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 733 | void rxrpc_kill_connection(struct rxrpc_connection *); |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 734 | void __rxrpc_put_connection(struct rxrpc_connection *); |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 735 | void __exit rxrpc_destroy_all_connections(void); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 736 | |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 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 | { |
David Howells | e8d70ce | 2016-06-30 12:16:21 +0100 | [diff] [blame] | 744 | return !rxrpc_conn_is_client(conn); |
David Howells | 19ffa01 | 2016-04-04 14:00:36 +0100 | [diff] [blame] | 745 | } |
| 746 | |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 747 | static inline void rxrpc_get_connection(struct rxrpc_connection *conn) |
| 748 | { |
| 749 | atomic_inc(&conn->usage); |
| 750 | } |
| 751 | |
David Howells | 2c4579e | 2016-06-27 10:32:03 +0100 | [diff] [blame] | 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 | } |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 757 | |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 758 | static inline void rxrpc_put_connection(struct rxrpc_connection *conn) |
| 759 | { |
David Howells | 45025bc | 2016-08-24 07:30:52 +0100 | [diff] [blame] | 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 | } |
David Howells | f51b448 | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 770 | } |
| 771 | |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 772 | static inline bool rxrpc_queue_conn(struct rxrpc_connection *conn) |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 773 | { |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 774 | if (!rxrpc_get_connection_maybe(conn)) |
| 775 | return false; |
| 776 | if (!rxrpc_queue_work(&conn->processor)) |
David Howells | 2c4579e | 2016-06-27 10:32:03 +0100 | [diff] [blame] | 777 | rxrpc_put_connection(conn); |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 778 | return true; |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 779 | } |
| 780 | |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 781 | /* |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 782 | * conn_service.c |
| 783 | */ |
David Howells | 8496af5 | 2016-07-01 07:51:50 +0100 | [diff] [blame] | 784 | struct rxrpc_connection *rxrpc_find_service_conn_rcu(struct rxrpc_peer *, |
| 785 | struct sk_buff *); |
David Howells | 00e9071 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 786 | struct rxrpc_connection *rxrpc_prealloc_service_connection(gfp_t); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 787 | void rxrpc_new_incoming_connection(struct rxrpc_connection *, struct sk_buff *); |
David Howells | 001c112 | 2016-06-30 10:45:22 +0100 | [diff] [blame] | 788 | void rxrpc_unpublish_service_conn(struct rxrpc_connection *); |
David Howells | 7877a4a | 2016-04-04 14:00:40 +0100 | [diff] [blame] | 789 | |
| 790 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 791 | * input.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 792 | */ |
David S. Miller | 676d236 | 2014-04-11 16:15:36 -0400 | [diff] [blame] | 793 | void rxrpc_data_ready(struct sock *); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 794 | |
| 795 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 796 | * insecure.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 797 | */ |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 798 | extern const struct rxrpc_security rxrpc_no_security; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 799 | |
| 800 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 801 | * key.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 802 | */ |
| 803 | extern struct key_type key_type_rxrpc; |
| 804 | extern struct key_type key_type_rxrpc_s; |
| 805 | |
Joe Perches | c1b1203 | 2013-10-18 13:48:25 -0700 | [diff] [blame] | 806 | int rxrpc_request_key(struct rxrpc_sock *, char __user *, int); |
| 807 | int rxrpc_server_keyring(struct rxrpc_sock *, char __user *, int); |
| 808 | int rxrpc_get_server_data_key(struct rxrpc_connection *, const void *, time_t, |
| 809 | u32); |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 810 | |
| 811 | /* |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 812 | * local_event.c |
| 813 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 814 | extern void rxrpc_process_local_events(struct rxrpc_local *); |
David Howells | 8756361 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 815 | |
| 816 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 817 | * local_object.c |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 818 | */ |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 819 | struct rxrpc_local *rxrpc_lookup_local(const struct sockaddr_rxrpc *); |
| 820 | void __rxrpc_put_local(struct rxrpc_local *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 821 | void __exit rxrpc_destroy_all_locals(void); |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 822 | |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 823 | static inline void rxrpc_get_local(struct rxrpc_local *local) |
| 824 | { |
| 825 | atomic_inc(&local->usage); |
| 826 | } |
| 827 | |
| 828 | static inline |
| 829 | struct rxrpc_local *rxrpc_get_local_maybe(struct rxrpc_local *local) |
| 830 | { |
| 831 | return atomic_inc_not_zero(&local->usage) ? local : NULL; |
| 832 | } |
| 833 | |
| 834 | static inline void rxrpc_put_local(struct rxrpc_local *local) |
| 835 | { |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 836 | if (local && atomic_dec_and_test(&local->usage)) |
David Howells | 4f95dd7 | 2016-04-04 14:00:35 +0100 | [diff] [blame] | 837 | __rxrpc_put_local(local); |
| 838 | } |
| 839 | |
David Howells | 5acbee4 | 2016-06-27 10:32:02 +0100 | [diff] [blame] | 840 | static inline void rxrpc_queue_local(struct rxrpc_local *local) |
| 841 | { |
| 842 | rxrpc_queue_work(&local->processor); |
| 843 | } |
| 844 | |
David Howells | e0e4d82 | 2016-04-07 17:23:58 +0100 | [diff] [blame] | 845 | /* |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 846 | * misc.c |
| 847 | */ |
David Howells | 0e119b4 | 2016-06-10 22:30:37 +0100 | [diff] [blame] | 848 | extern unsigned int rxrpc_max_backlog __read_mostly; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 849 | extern unsigned int rxrpc_requested_ack_delay; |
| 850 | extern unsigned int rxrpc_soft_ack_delay; |
| 851 | extern unsigned int rxrpc_idle_ack_delay; |
| 852 | extern unsigned int rxrpc_rx_window_size; |
| 853 | extern unsigned int rxrpc_rx_mtu; |
| 854 | extern unsigned int rxrpc_rx_jumbo_max; |
David Howells | 0b58b8a | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 855 | extern unsigned int rxrpc_resend_timeout; |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 856 | |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 857 | extern const s8 rxrpc_ack_priority[]; |
| 858 | |
David Howells | 8e688d9 | 2016-04-07 17:23:16 +0100 | [diff] [blame] | 859 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 860 | * output.c |
| 861 | */ |
David Howells | 8d94aa3 | 2016-09-07 09:19:31 +0100 | [diff] [blame] | 862 | int rxrpc_send_call_packet(struct rxrpc_call *, u8); |
David Howells | 985a5c8 | 2016-06-17 11:53:37 +0100 | [diff] [blame] | 863 | int rxrpc_send_data_packet(struct rxrpc_connection *, struct sk_buff *); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 864 | void rxrpc_reject_packets(struct rxrpc_local *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 865 | |
| 866 | /* |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 867 | * peer_event.c |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 868 | */ |
David Howells | abe89ef | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 869 | void rxrpc_error_report(struct sock *); |
David Howells | f66d749 | 2016-04-04 14:00:34 +0100 | [diff] [blame] | 870 | void rxrpc_peer_error_distributor(struct work_struct *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 871 | |
| 872 | /* |
| 873 | * peer_object.c |
| 874 | */ |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 875 | struct rxrpc_peer *rxrpc_lookup_peer_rcu(struct rxrpc_local *, |
| 876 | const struct sockaddr_rxrpc *); |
| 877 | struct rxrpc_peer *rxrpc_lookup_peer(struct rxrpc_local *, |
| 878 | struct sockaddr_rxrpc *, gfp_t); |
| 879 | struct rxrpc_peer *rxrpc_alloc_peer(struct rxrpc_local *, gfp_t); |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 880 | struct rxrpc_peer *rxrpc_lookup_incoming_peer(struct rxrpc_local *, |
| 881 | struct rxrpc_peer *); |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 882 | |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 883 | static inline struct rxrpc_peer *rxrpc_get_peer(struct rxrpc_peer *peer) |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 884 | { |
| 885 | atomic_inc(&peer->usage); |
David Howells | df5d8bf | 2016-08-24 14:31:43 +0100 | [diff] [blame] | 886 | return peer; |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 887 | } |
| 888 | |
| 889 | static inline |
| 890 | struct rxrpc_peer *rxrpc_get_peer_maybe(struct rxrpc_peer *peer) |
| 891 | { |
| 892 | return atomic_inc_not_zero(&peer->usage) ? peer : NULL; |
| 893 | } |
| 894 | |
| 895 | extern void __rxrpc_put_peer(struct rxrpc_peer *peer); |
| 896 | static inline void rxrpc_put_peer(struct rxrpc_peer *peer) |
| 897 | { |
David Howells | 5627cc8 | 2016-04-04 14:00:38 +0100 | [diff] [blame] | 898 | if (peer && atomic_dec_and_test(&peer->usage)) |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 899 | __rxrpc_put_peer(peer); |
| 900 | } |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 901 | |
| 902 | /* |
| 903 | * proc.c |
| 904 | */ |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 905 | extern const struct file_operations rxrpc_call_seq_fops; |
| 906 | extern const struct file_operations rxrpc_connection_seq_fops; |
| 907 | |
| 908 | /* |
| 909 | * recvmsg.c |
| 910 | */ |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 911 | void rxrpc_notify_socket(struct rxrpc_call *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 912 | int rxrpc_recvmsg(struct socket *, struct msghdr *, size_t, int); |
| 913 | |
| 914 | /* |
David Howells | 648af7f | 2016-04-07 17:23:51 +0100 | [diff] [blame] | 915 | * rxkad.c |
| 916 | */ |
| 917 | #ifdef CONFIG_RXKAD |
| 918 | extern const struct rxrpc_security rxkad; |
| 919 | #endif |
| 920 | |
| 921 | /* |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 922 | * security.c |
| 923 | */ |
| 924 | int __init rxrpc_init_security(void); |
| 925 | void rxrpc_exit_security(void); |
| 926 | int rxrpc_init_client_conn_security(struct rxrpc_connection *); |
| 927 | int rxrpc_init_server_conn_security(struct rxrpc_connection *); |
David Howells | 71a17de | 2016-09-07 14:43:39 +0100 | [diff] [blame] | 928 | |
David Howells | 0b58b8a | 2016-09-02 22:39:45 +0100 | [diff] [blame] | 929 | /* |
| 930 | * sendmsg.c |
| 931 | */ |
| 932 | int rxrpc_do_sendmsg(struct rxrpc_sock *, struct msghdr *, size_t); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 933 | |
| 934 | /* |
| 935 | * skbuff.c |
| 936 | */ |
David Howells | d001648 | 2016-08-30 20:42:14 +0100 | [diff] [blame] | 937 | void rxrpc_kernel_data_consumed(struct rxrpc_call *, struct sk_buff *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 938 | void rxrpc_packet_destructor(struct sk_buff *); |
David Howells | df844fd | 2016-08-23 15:27:24 +0100 | [diff] [blame] | 939 | void rxrpc_new_skb(struct sk_buff *); |
| 940 | void rxrpc_see_skb(struct sk_buff *); |
| 941 | void rxrpc_get_skb(struct sk_buff *); |
| 942 | void rxrpc_free_skb(struct sk_buff *); |
| 943 | void rxrpc_purge_queue(struct sk_buff_head *); |
David Howells | 0d81a51 | 2016-06-13 13:30:30 +0100 | [diff] [blame] | 944 | |
| 945 | /* |
David Howells | 5873c08 | 2014-02-07 18:58:44 +0000 | [diff] [blame] | 946 | * sysctl.c |
| 947 | */ |
| 948 | #ifdef CONFIG_SYSCTL |
| 949 | extern int __init rxrpc_sysctl_init(void); |
| 950 | extern void rxrpc_sysctl_exit(void); |
| 951 | #else |
| 952 | static inline int __init rxrpc_sysctl_init(void) { return 0; } |
| 953 | static inline void rxrpc_sysctl_exit(void) {} |
| 954 | #endif |
| 955 | |
| 956 | /* |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 957 | * utils.c |
| 958 | */ |
David Howells | d991b4a | 2016-06-29 14:40:39 +0100 | [diff] [blame] | 959 | int rxrpc_extract_addr_from_skb(struct sockaddr_rxrpc *, struct sk_buff *); |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 960 | |
David Howells | 248f219 | 2016-09-08 11:10:12 +0100 | [diff] [blame] | 961 | static inline bool before(u32 seq1, u32 seq2) |
| 962 | { |
| 963 | return (s32)(seq1 - seq2) < 0; |
| 964 | } |
| 965 | static inline bool before_eq(u32 seq1, u32 seq2) |
| 966 | { |
| 967 | return (s32)(seq1 - seq2) <= 0; |
| 968 | } |
| 969 | static inline bool after(u32 seq1, u32 seq2) |
| 970 | { |
| 971 | return (s32)(seq1 - seq2) > 0; |
| 972 | } |
| 973 | static inline bool after_eq(u32 seq1, u32 seq2) |
| 974 | { |
| 975 | return (s32)(seq1 - seq2) >= 0; |
| 976 | } |
| 977 | |
David Howells | be6e670 | 2016-04-04 14:00:32 +0100 | [diff] [blame] | 978 | /* |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 979 | * debug tracing |
| 980 | */ |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 981 | extern unsigned int rxrpc_debug; |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 982 | |
| 983 | #define dbgprintk(FMT,...) \ |
Sven Schnelle | 9f389f4 | 2008-04-03 10:45:30 +0100 | [diff] [blame] | 984 | printk("[%-6.6s] "FMT"\n", current->comm ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 985 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 986 | #define kenter(FMT,...) dbgprintk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 987 | #define kleave(FMT,...) dbgprintk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 988 | #define kdebug(FMT,...) dbgprintk(" "FMT ,##__VA_ARGS__) |
| 989 | #define kproto(FMT,...) dbgprintk("### "FMT ,##__VA_ARGS__) |
| 990 | #define knet(FMT,...) dbgprintk("@@@ "FMT ,##__VA_ARGS__) |
| 991 | |
| 992 | |
| 993 | #if defined(__KDEBUG) |
| 994 | #define _enter(FMT,...) kenter(FMT,##__VA_ARGS__) |
| 995 | #define _leave(FMT,...) kleave(FMT,##__VA_ARGS__) |
| 996 | #define _debug(FMT,...) kdebug(FMT,##__VA_ARGS__) |
| 997 | #define _proto(FMT,...) kproto(FMT,##__VA_ARGS__) |
| 998 | #define _net(FMT,...) knet(FMT,##__VA_ARGS__) |
| 999 | |
| 1000 | #elif defined(CONFIG_AF_RXRPC_DEBUG) |
| 1001 | #define RXRPC_DEBUG_KENTER 0x01 |
| 1002 | #define RXRPC_DEBUG_KLEAVE 0x02 |
| 1003 | #define RXRPC_DEBUG_KDEBUG 0x04 |
| 1004 | #define RXRPC_DEBUG_KPROTO 0x08 |
| 1005 | #define RXRPC_DEBUG_KNET 0x10 |
| 1006 | |
| 1007 | #define _enter(FMT,...) \ |
| 1008 | do { \ |
| 1009 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KENTER)) \ |
| 1010 | kenter(FMT,##__VA_ARGS__); \ |
| 1011 | } while (0) |
| 1012 | |
| 1013 | #define _leave(FMT,...) \ |
| 1014 | do { \ |
| 1015 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KLEAVE)) \ |
| 1016 | kleave(FMT,##__VA_ARGS__); \ |
| 1017 | } while (0) |
| 1018 | |
| 1019 | #define _debug(FMT,...) \ |
| 1020 | do { \ |
| 1021 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KDEBUG)) \ |
| 1022 | kdebug(FMT,##__VA_ARGS__); \ |
| 1023 | } while (0) |
| 1024 | |
| 1025 | #define _proto(FMT,...) \ |
| 1026 | do { \ |
| 1027 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KPROTO)) \ |
| 1028 | kproto(FMT,##__VA_ARGS__); \ |
| 1029 | } while (0) |
| 1030 | |
| 1031 | #define _net(FMT,...) \ |
| 1032 | do { \ |
| 1033 | if (unlikely(rxrpc_debug & RXRPC_DEBUG_KNET)) \ |
| 1034 | knet(FMT,##__VA_ARGS__); \ |
| 1035 | } while (0) |
| 1036 | |
| 1037 | #else |
David Howells | 12fdff3 | 2010-08-12 16:54:57 +0100 | [diff] [blame] | 1038 | #define _enter(FMT,...) no_printk("==> %s("FMT")",__func__ ,##__VA_ARGS__) |
| 1039 | #define _leave(FMT,...) no_printk("<== %s()"FMT"",__func__ ,##__VA_ARGS__) |
| 1040 | #define _debug(FMT,...) no_printk(" "FMT ,##__VA_ARGS__) |
| 1041 | #define _proto(FMT,...) no_printk("### "FMT ,##__VA_ARGS__) |
| 1042 | #define _net(FMT,...) no_printk("@@@ "FMT ,##__VA_ARGS__) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1043 | #endif |
| 1044 | |
| 1045 | /* |
| 1046 | * debug assertion checking |
| 1047 | */ |
| 1048 | #if 1 // defined(__KDEBUGALL) |
| 1049 | |
| 1050 | #define ASSERT(X) \ |
| 1051 | do { \ |
| 1052 | if (unlikely(!(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1053 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1054 | BUG(); \ |
| 1055 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1056 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1057 | |
| 1058 | #define ASSERTCMP(X, OP, Y) \ |
| 1059 | do { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1060 | __typeof__(X) _x = (X); \ |
| 1061 | __typeof__(Y) _y = (__typeof__(X))(Y); \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1062 | if (unlikely(!(_x OP _y))) { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1063 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
| 1064 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
| 1065 | (unsigned long)_y, (unsigned long)_y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1066 | BUG(); \ |
| 1067 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1068 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1069 | |
| 1070 | #define ASSERTIF(C, X) \ |
| 1071 | do { \ |
| 1072 | if (unlikely((C) && !(X))) { \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1073 | pr_err("Assertion failed\n"); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1074 | BUG(); \ |
| 1075 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1076 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1077 | |
| 1078 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1079 | do { \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1080 | __typeof__(X) _x = (X); \ |
| 1081 | __typeof__(Y) _y = (__typeof__(X))(Y); \ |
Joe Perches | 9b6d539 | 2016-06-02 12:08:52 -0700 | [diff] [blame] | 1082 | if (unlikely((C) && !(_x OP _y))) { \ |
| 1083 | pr_err("Assertion failed - %lu(0x%lx) %s %lu(0x%lx) is false\n", \ |
David Howells | cf13258 | 2016-09-08 11:10:11 +0100 | [diff] [blame] | 1084 | (unsigned long)_x, (unsigned long)_x, #OP, \ |
| 1085 | (unsigned long)_y, (unsigned long)_y); \ |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1086 | BUG(); \ |
| 1087 | } \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1088 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1089 | |
| 1090 | #else |
| 1091 | |
| 1092 | #define ASSERT(X) \ |
| 1093 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1094 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1095 | |
| 1096 | #define ASSERTCMP(X, OP, Y) \ |
| 1097 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1098 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1099 | |
| 1100 | #define ASSERTIF(C, X) \ |
| 1101 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1102 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1103 | |
| 1104 | #define ASSERTIFCMP(C, X, OP, Y) \ |
| 1105 | do { \ |
David Howells | b4f1342 | 2016-03-04 15:56:19 +0000 | [diff] [blame] | 1106 | } while (0) |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 1107 | |
| 1108 | #endif /* __KDEBUGALL */ |