Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * net/dccp/proto.c |
| 3 | * |
| 4 | * An implementation of the DCCP protocol |
| 5 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 12 | #include <linux/dccp.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/sched.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/skbuff.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/in.h> |
| 20 | #include <linux/if_arp.h> |
| 21 | #include <linux/init.h> |
| 22 | #include <linux/random.h> |
| 23 | #include <net/checksum.h> |
| 24 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 25 | #include <net/inet_sock.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 26 | #include <net/sock.h> |
| 27 | #include <net/xfrm.h> |
| 28 | |
Arnaldo Carvalho de Melo | 6273172 | 2007-10-23 20:23:30 -0700 | [diff] [blame] | 29 | #include <asm/ioctls.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 30 | #include <linux/spinlock.h> |
| 31 | #include <linux/timer.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/poll.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 34 | |
| 35 | #include "ccid.h" |
| 36 | #include "dccp.h" |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 37 | #include "feat.h" |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 38 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 39 | DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 40 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 41 | EXPORT_SYMBOL_GPL(dccp_statistics); |
| 42 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 43 | atomic_t dccp_orphan_count = ATOMIC_INIT(0); |
| 44 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 45 | EXPORT_SYMBOL_GPL(dccp_orphan_count); |
| 46 | |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 47 | struct inet_hashinfo dccp_hashinfo; |
Arnaldo Carvalho de Melo | 075ae86 | 2006-03-20 21:24:19 -0800 | [diff] [blame] | 48 | EXPORT_SYMBOL_GPL(dccp_hashinfo); |
| 49 | |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 50 | /* the maximum queue length for tx in packets. 0 is no limit */ |
| 51 | int sysctl_dccp_tx_qlen __read_mostly = 5; |
| 52 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 53 | void dccp_set_state(struct sock *sk, const int state) |
| 54 | { |
| 55 | const int oldstate = sk->sk_state; |
| 56 | |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 57 | dccp_pr_debug("%s(%p) %s --> %s\n", dccp_role(sk), sk, |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 58 | dccp_state_name(oldstate), dccp_state_name(state)); |
| 59 | WARN_ON(state == oldstate); |
| 60 | |
| 61 | switch (state) { |
| 62 | case DCCP_OPEN: |
| 63 | if (oldstate != DCCP_OPEN) |
| 64 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); |
| 65 | break; |
| 66 | |
| 67 | case DCCP_CLOSED: |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 68 | if (oldstate == DCCP_OPEN || oldstate == DCCP_ACTIVE_CLOSEREQ || |
| 69 | oldstate == DCCP_CLOSING) |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 70 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); |
| 71 | |
| 72 | sk->sk_prot->unhash(sk); |
| 73 | if (inet_csk(sk)->icsk_bind_hash != NULL && |
| 74 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 75 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 76 | /* fall through */ |
| 77 | default: |
| 78 | if (oldstate == DCCP_OPEN) |
| 79 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); |
| 80 | } |
| 81 | |
| 82 | /* Change state AFTER socket is unhashed to avoid closed |
| 83 | * socket sitting in hash tables. |
| 84 | */ |
| 85 | sk->sk_state = state; |
| 86 | } |
| 87 | |
| 88 | EXPORT_SYMBOL_GPL(dccp_set_state); |
| 89 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 90 | static void dccp_finish_passive_close(struct sock *sk) |
| 91 | { |
| 92 | switch (sk->sk_state) { |
| 93 | case DCCP_PASSIVE_CLOSE: |
| 94 | /* Node (client or server) has received Close packet. */ |
| 95 | dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED); |
| 96 | dccp_set_state(sk, DCCP_CLOSED); |
| 97 | break; |
| 98 | case DCCP_PASSIVE_CLOSEREQ: |
| 99 | /* |
| 100 | * Client received CloseReq. We set the `active' flag so that |
| 101 | * dccp_send_close() retransmits the Close as per RFC 4340, 8.3. |
| 102 | */ |
| 103 | dccp_send_close(sk, 1); |
| 104 | dccp_set_state(sk, DCCP_CLOSING); |
| 105 | } |
| 106 | } |
| 107 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 108 | void dccp_done(struct sock *sk) |
| 109 | { |
| 110 | dccp_set_state(sk, DCCP_CLOSED); |
| 111 | dccp_clear_xmit_timers(sk); |
| 112 | |
| 113 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 114 | |
| 115 | if (!sock_flag(sk, SOCK_DEAD)) |
| 116 | sk->sk_state_change(sk); |
| 117 | else |
| 118 | inet_csk_destroy_sock(sk); |
| 119 | } |
| 120 | |
| 121 | EXPORT_SYMBOL_GPL(dccp_done); |
| 122 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 123 | const char *dccp_packet_name(const int type) |
| 124 | { |
| 125 | static const char *dccp_packet_names[] = { |
| 126 | [DCCP_PKT_REQUEST] = "REQUEST", |
| 127 | [DCCP_PKT_RESPONSE] = "RESPONSE", |
| 128 | [DCCP_PKT_DATA] = "DATA", |
| 129 | [DCCP_PKT_ACK] = "ACK", |
| 130 | [DCCP_PKT_DATAACK] = "DATAACK", |
| 131 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", |
| 132 | [DCCP_PKT_CLOSE] = "CLOSE", |
| 133 | [DCCP_PKT_RESET] = "RESET", |
| 134 | [DCCP_PKT_SYNC] = "SYNC", |
| 135 | [DCCP_PKT_SYNCACK] = "SYNCACK", |
| 136 | }; |
| 137 | |
| 138 | if (type >= DCCP_NR_PKT_TYPES) |
| 139 | return "INVALID"; |
| 140 | else |
| 141 | return dccp_packet_names[type]; |
| 142 | } |
| 143 | |
| 144 | EXPORT_SYMBOL_GPL(dccp_packet_name); |
| 145 | |
| 146 | const char *dccp_state_name(const int state) |
| 147 | { |
| 148 | static char *dccp_state_names[] = { |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 149 | [DCCP_OPEN] = "OPEN", |
| 150 | [DCCP_REQUESTING] = "REQUESTING", |
| 151 | [DCCP_PARTOPEN] = "PARTOPEN", |
| 152 | [DCCP_LISTEN] = "LISTEN", |
| 153 | [DCCP_RESPOND] = "RESPOND", |
| 154 | [DCCP_CLOSING] = "CLOSING", |
| 155 | [DCCP_ACTIVE_CLOSEREQ] = "CLOSEREQ", |
| 156 | [DCCP_PASSIVE_CLOSE] = "PASSIVE_CLOSE", |
| 157 | [DCCP_PASSIVE_CLOSEREQ] = "PASSIVE_CLOSEREQ", |
| 158 | [DCCP_TIME_WAIT] = "TIME_WAIT", |
| 159 | [DCCP_CLOSED] = "CLOSED", |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 160 | }; |
| 161 | |
| 162 | if (state >= DCCP_MAX_STATES) |
| 163 | return "INVALID STATE!"; |
| 164 | else |
| 165 | return dccp_state_names[state]; |
| 166 | } |
| 167 | |
| 168 | EXPORT_SYMBOL_GPL(dccp_state_name); |
| 169 | |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 170 | int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized) |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 171 | { |
| 172 | struct dccp_sock *dp = dccp_sk(sk); |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 173 | struct dccp_minisock *dmsk = dccp_msk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 174 | struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 175 | |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 176 | dccp_minisock_init(&dp->dccps_minisock); |
| 177 | |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 178 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; |
| 179 | icsk->icsk_syn_retries = sysctl_dccp_request_retries; |
| 180 | sk->sk_state = DCCP_CLOSED; |
| 181 | sk->sk_write_space = dccp_write_space; |
| 182 | icsk->icsk_sync_mss = dccp_sync_mss; |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 183 | dp->dccps_mss_cache = 536; |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 184 | dp->dccps_rate_last = jiffies; |
| 185 | dp->dccps_role = DCCP_ROLE_UNDEFINED; |
| 186 | dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 187 | dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 188 | |
| 189 | dccp_init_xmit_timers(sk); |
| 190 | |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 191 | INIT_LIST_HEAD(&dp->dccps_featneg); |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 192 | /* |
| 193 | * FIXME: We're hardcoding the CCID, and doing this at this point makes |
| 194 | * the listening (master) sock get CCID control blocks, which is not |
| 195 | * necessary, but for now, to not mess with the test userspace apps, |
| 196 | * lets leave it here, later the real solution is to do this in a |
| 197 | * setsockopt(CCIDs-I-want/accept). -acme |
| 198 | */ |
| 199 | if (likely(ctl_sock_initialized)) { |
Gerrit Renker | e8ef967 | 2008-11-12 00:43:40 -0800 | [diff] [blame] | 200 | int rc = dccp_feat_init(sk); |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 201 | |
| 202 | if (rc) |
| 203 | return rc; |
| 204 | |
| 205 | if (dmsk->dccpms_send_ack_vector) { |
| 206 | dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL); |
| 207 | if (dp->dccps_hc_rx_ackvec == NULL) |
| 208 | return -ENOMEM; |
| 209 | } |
| 210 | dp->dccps_hc_rx_ccid = ccid_hc_rx_new(dmsk->dccpms_rx_ccid, |
| 211 | sk, GFP_KERNEL); |
| 212 | dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid, |
| 213 | sk, GFP_KERNEL); |
| 214 | if (unlikely(dp->dccps_hc_rx_ccid == NULL || |
| 215 | dp->dccps_hc_tx_ccid == NULL)) { |
| 216 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
| 217 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); |
| 218 | if (dmsk->dccpms_send_ack_vector) { |
| 219 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
| 220 | dp->dccps_hc_rx_ackvec = NULL; |
| 221 | } |
| 222 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; |
| 223 | return -ENOMEM; |
| 224 | } |
| 225 | } else { |
| 226 | /* control socket doesn't need feat nego */ |
| 227 | INIT_LIST_HEAD(&dmsk->dccpms_pending); |
| 228 | INIT_LIST_HEAD(&dmsk->dccpms_conf); |
| 229 | } |
| 230 | |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 231 | return 0; |
| 232 | } |
| 233 | |
| 234 | EXPORT_SYMBOL_GPL(dccp_init_sock); |
| 235 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 236 | void dccp_destroy_sock(struct sock *sk) |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 237 | { |
| 238 | struct dccp_sock *dp = dccp_sk(sk); |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 239 | struct dccp_minisock *dmsk = dccp_msk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 240 | |
| 241 | /* |
| 242 | * DCCP doesn't use sk_write_queue, just sk_send_head |
| 243 | * for retransmissions |
| 244 | */ |
| 245 | if (sk->sk_send_head != NULL) { |
| 246 | kfree_skb(sk->sk_send_head); |
| 247 | sk->sk_send_head = NULL; |
| 248 | } |
| 249 | |
| 250 | /* Clean up a referenced DCCP bind bucket. */ |
| 251 | if (inet_csk(sk)->icsk_bind_hash != NULL) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 252 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 253 | |
| 254 | kfree(dp->dccps_service_list); |
| 255 | dp->dccps_service_list = NULL; |
| 256 | |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 257 | if (dmsk->dccpms_send_ack_vector) { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 258 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
| 259 | dp->dccps_hc_rx_ackvec = NULL; |
| 260 | } |
| 261 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
| 262 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); |
| 263 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; |
| 264 | |
| 265 | /* clean up feature negotiation state */ |
Gerrit Renker | d99a7bd | 2008-11-04 23:56:30 -0800 | [diff] [blame] | 266 | dccp_feat_list_purge(&dp->dccps_featneg); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); |
| 270 | |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 271 | static inline int dccp_listen_start(struct sock *sk, int backlog) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 272 | { |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 273 | struct dccp_sock *dp = dccp_sk(sk); |
| 274 | |
| 275 | dp->dccps_role = DCCP_ROLE_LISTEN; |
Gerrit Renker | 9eca0a4 | 2008-11-12 00:48:44 -0800 | [diff] [blame] | 276 | /* do not start to listen if feature negotiation setup fails */ |
| 277 | if (dccp_feat_finalise_settings(dp)) |
| 278 | return -EPROTO; |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 279 | return inet_csk_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 282 | static inline int dccp_need_reset(int state) |
| 283 | { |
| 284 | return state != DCCP_CLOSED && state != DCCP_LISTEN && |
| 285 | state != DCCP_REQUESTING; |
| 286 | } |
| 287 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 288 | int dccp_disconnect(struct sock *sk, int flags) |
| 289 | { |
| 290 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 291 | struct inet_sock *inet = inet_sk(sk); |
| 292 | int err = 0; |
| 293 | const int old_state = sk->sk_state; |
| 294 | |
| 295 | if (old_state != DCCP_CLOSED) |
| 296 | dccp_set_state(sk, DCCP_CLOSED); |
| 297 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 298 | /* |
| 299 | * This corresponds to the ABORT function of RFC793, sec. 3.8 |
| 300 | * TCP uses a RST segment, DCCP a Reset packet with Code 2, "Aborted". |
| 301 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 302 | if (old_state == DCCP_LISTEN) { |
| 303 | inet_csk_listen_stop(sk); |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 304 | } else if (dccp_need_reset(old_state)) { |
| 305 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 306 | sk->sk_err = ECONNRESET; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 307 | } else if (old_state == DCCP_REQUESTING) |
| 308 | sk->sk_err = ECONNRESET; |
| 309 | |
| 310 | dccp_clear_xmit_timers(sk); |
Gerrit Renker | 4881632 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 311 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 312 | __skb_queue_purge(&sk->sk_receive_queue); |
Gerrit Renker | 4881632 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 313 | __skb_queue_purge(&sk->sk_write_queue); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 314 | if (sk->sk_send_head != NULL) { |
| 315 | __kfree_skb(sk->sk_send_head); |
| 316 | sk->sk_send_head = NULL; |
| 317 | } |
| 318 | |
| 319 | inet->dport = 0; |
| 320 | |
| 321 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) |
| 322 | inet_reset_saddr(sk); |
| 323 | |
| 324 | sk->sk_shutdown = 0; |
| 325 | sock_reset_flag(sk, SOCK_DONE); |
| 326 | |
| 327 | icsk->icsk_backoff = 0; |
| 328 | inet_csk_delack_init(sk); |
| 329 | __sk_dst_reset(sk); |
| 330 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 331 | WARN_ON(inet->num && !icsk->icsk_bind_hash); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 332 | |
| 333 | sk->sk_error_report(sk); |
| 334 | return err; |
| 335 | } |
| 336 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 337 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
| 338 | |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 339 | /* |
| 340 | * Wait for a DCCP event. |
| 341 | * |
| 342 | * Note that we don't need to lock the socket, as the upper poll layers |
| 343 | * take care of normal races (between the test and the event) and we don't |
| 344 | * go look at any of the socket buffers directly. |
| 345 | */ |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 346 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
| 347 | poll_table *wait) |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 348 | { |
| 349 | unsigned int mask; |
| 350 | struct sock *sk = sock->sk; |
| 351 | |
| 352 | poll_wait(file, sk->sk_sleep, wait); |
| 353 | if (sk->sk_state == DCCP_LISTEN) |
| 354 | return inet_csk_listen_poll(sk); |
| 355 | |
| 356 | /* Socket is not locked. We are protected from async events |
| 357 | by poll logic and correct handling of state changes |
| 358 | made by another threads is impossible in any case. |
| 359 | */ |
| 360 | |
| 361 | mask = 0; |
| 362 | if (sk->sk_err) |
| 363 | mask = POLLERR; |
| 364 | |
| 365 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) |
| 366 | mask |= POLLHUP; |
| 367 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
Davide Libenzi | f348d70 | 2006-03-25 03:07:39 -0800 | [diff] [blame] | 368 | mask |= POLLIN | POLLRDNORM | POLLRDHUP; |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 369 | |
| 370 | /* Connected? */ |
| 371 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { |
| 372 | if (atomic_read(&sk->sk_rmem_alloc) > 0) |
| 373 | mask |= POLLIN | POLLRDNORM; |
| 374 | |
| 375 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { |
| 376 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
| 377 | mask |= POLLOUT | POLLWRNORM; |
| 378 | } else { /* send SIGIO later */ |
| 379 | set_bit(SOCK_ASYNC_NOSPACE, |
| 380 | &sk->sk_socket->flags); |
| 381 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 382 | |
| 383 | /* Race breaker. If space is freed after |
| 384 | * wspace test but before the flags are set, |
| 385 | * IO signal will be lost. |
| 386 | */ |
| 387 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) |
| 388 | mask |= POLLOUT | POLLWRNORM; |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | return mask; |
| 393 | } |
| 394 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 395 | EXPORT_SYMBOL_GPL(dccp_poll); |
| 396 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 397 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 398 | { |
Arnaldo Carvalho de Melo | 6273172 | 2007-10-23 20:23:30 -0700 | [diff] [blame] | 399 | int rc = -ENOTCONN; |
| 400 | |
| 401 | lock_sock(sk); |
| 402 | |
| 403 | if (sk->sk_state == DCCP_LISTEN) |
| 404 | goto out; |
| 405 | |
| 406 | switch (cmd) { |
| 407 | case SIOCINQ: { |
| 408 | struct sk_buff *skb; |
| 409 | unsigned long amount = 0; |
| 410 | |
| 411 | skb = skb_peek(&sk->sk_receive_queue); |
| 412 | if (skb != NULL) { |
| 413 | /* |
| 414 | * We will only return the amount of this packet since |
| 415 | * that is all that will be read. |
| 416 | */ |
| 417 | amount = skb->len; |
| 418 | } |
| 419 | rc = put_user(amount, (int __user *)arg); |
| 420 | } |
| 421 | break; |
| 422 | default: |
| 423 | rc = -ENOIOCTLCMD; |
| 424 | break; |
| 425 | } |
| 426 | out: |
| 427 | release_sock(sk); |
| 428 | return rc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 429 | } |
| 430 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 431 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
| 432 | |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 433 | static int dccp_setsockopt_service(struct sock *sk, const __be32 service, |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 434 | char __user *optval, int optlen) |
| 435 | { |
| 436 | struct dccp_sock *dp = dccp_sk(sk); |
| 437 | struct dccp_service_list *sl = NULL; |
| 438 | |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 439 | if (service == DCCP_SERVICE_INVALID_VALUE || |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 440 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) |
| 441 | return -EINVAL; |
| 442 | |
| 443 | if (optlen > sizeof(service)) { |
| 444 | sl = kmalloc(optlen, GFP_KERNEL); |
| 445 | if (sl == NULL) |
| 446 | return -ENOMEM; |
| 447 | |
| 448 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; |
| 449 | if (copy_from_user(sl->dccpsl_list, |
| 450 | optval + sizeof(service), |
| 451 | optlen - sizeof(service)) || |
| 452 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { |
| 453 | kfree(sl); |
| 454 | return -EFAULT; |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | lock_sock(sk); |
| 459 | dp->dccps_service = service; |
| 460 | |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 461 | kfree(dp->dccps_service_list); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 462 | |
| 463 | dp->dccps_service_list = sl; |
| 464 | release_sock(sk); |
| 465 | return 0; |
| 466 | } |
| 467 | |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 468 | static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx) |
| 469 | { |
| 470 | u8 *list, len; |
| 471 | int i, rc; |
| 472 | |
| 473 | if (cscov < 0 || cscov > 15) |
| 474 | return -EINVAL; |
| 475 | /* |
| 476 | * Populate a list of permissible values, in the range cscov...15. This |
| 477 | * is necessary since feature negotiation of single values only works if |
| 478 | * both sides incidentally choose the same value. Since the list starts |
| 479 | * lowest-value first, negotiation will pick the smallest shared value. |
| 480 | */ |
| 481 | if (cscov == 0) |
| 482 | return 0; |
| 483 | len = 16 - cscov; |
| 484 | |
| 485 | list = kmalloc(len, GFP_KERNEL); |
| 486 | if (list == NULL) |
| 487 | return -ENOBUFS; |
| 488 | |
| 489 | for (i = 0; i < len; i++) |
| 490 | list[i] = cscov++; |
| 491 | |
| 492 | rc = dccp_feat_register_sp(sk, DCCPF_MIN_CSUM_COVER, rx, list, len); |
| 493 | |
| 494 | if (rc == 0) { |
| 495 | if (rx) |
| 496 | dccp_sk(sk)->dccps_pcrlen = cscov; |
| 497 | else |
| 498 | dccp_sk(sk)->dccps_pcslen = cscov; |
| 499 | } |
| 500 | kfree(list); |
| 501 | return rc; |
| 502 | } |
| 503 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 504 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
| 505 | char __user *optval, int optlen) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 506 | { |
Gerrit Renker | 09dbc38 | 2006-11-14 12:57:34 -0200 | [diff] [blame] | 507 | struct dccp_sock *dp = dccp_sk(sk); |
| 508 | int val, err = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 509 | |
Gerrit Renker | 1910299 | 2008-11-16 22:56:55 -0800 | [diff] [blame] | 510 | switch (optname) { |
| 511 | case DCCP_SOCKOPT_PACKET_SIZE: |
| 512 | DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); |
| 513 | return 0; |
| 514 | case DCCP_SOCKOPT_CHANGE_L: |
| 515 | case DCCP_SOCKOPT_CHANGE_R: |
| 516 | DCCP_WARN("sockopt(CHANGE_L/R) is deprecated: fix your app\n"); |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | if (optlen < (int)sizeof(int)) |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 521 | return -EINVAL; |
| 522 | |
| 523 | if (get_user(val, (int __user *)optval)) |
| 524 | return -EFAULT; |
| 525 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 526 | if (optname == DCCP_SOCKOPT_SERVICE) |
| 527 | return dccp_setsockopt_service(sk, val, optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 528 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 529 | lock_sock(sk); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 530 | switch (optname) { |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 531 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 532 | if (dp->dccps_role != DCCP_ROLE_SERVER) |
| 533 | err = -EOPNOTSUPP; |
| 534 | else |
| 535 | dp->dccps_server_timewait = (val != 0); |
| 536 | break; |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 537 | case DCCP_SOCKOPT_SEND_CSCOV: |
| 538 | err = dccp_setsockopt_cscov(sk, val, false); |
Tomasz Grobelny | d6da351 | 2008-09-04 07:30:19 +0200 | [diff] [blame] | 539 | break; |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 540 | case DCCP_SOCKOPT_RECV_CSCOV: |
| 541 | err = dccp_setsockopt_cscov(sk, val, true); |
Tomasz Grobelny | d6da351 | 2008-09-04 07:30:19 +0200 | [diff] [blame] | 542 | break; |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 543 | default: |
| 544 | err = -ENOPROTOOPT; |
| 545 | break; |
| 546 | } |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 547 | release_sock(sk); |
Gerrit Renker | 1910299 | 2008-11-16 22:56:55 -0800 | [diff] [blame] | 548 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 549 | return err; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 550 | } |
| 551 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 552 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
| 553 | char __user *optval, int optlen) |
| 554 | { |
| 555 | if (level != SOL_DCCP) |
| 556 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, |
| 557 | optname, optval, |
| 558 | optlen); |
| 559 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 560 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 561 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 562 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
| 563 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 564 | #ifdef CONFIG_COMPAT |
| 565 | int compat_dccp_setsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 566 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 567 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 568 | if (level != SOL_DCCP) |
| 569 | return inet_csk_compat_setsockopt(sk, level, optname, |
| 570 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 571 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 572 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 573 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 574 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
| 575 | #endif |
| 576 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 577 | static int dccp_getsockopt_service(struct sock *sk, int len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 578 | __be32 __user *optval, |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 579 | int __user *optlen) |
| 580 | { |
| 581 | const struct dccp_sock *dp = dccp_sk(sk); |
| 582 | const struct dccp_service_list *sl; |
| 583 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); |
| 584 | |
| 585 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 586 | if ((sl = dp->dccps_service_list) != NULL) { |
| 587 | slen = sl->dccpsl_nr * sizeof(u32); |
| 588 | total_len += slen; |
| 589 | } |
| 590 | |
| 591 | err = -EINVAL; |
| 592 | if (total_len > len) |
| 593 | goto out; |
| 594 | |
| 595 | err = 0; |
| 596 | if (put_user(total_len, optlen) || |
| 597 | put_user(dp->dccps_service, optval) || |
| 598 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) |
| 599 | err = -EFAULT; |
| 600 | out: |
| 601 | release_sock(sk); |
| 602 | return err; |
| 603 | } |
| 604 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 605 | static int do_dccp_getsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 606 | char __user *optval, int __user *optlen) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 607 | { |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 608 | struct dccp_sock *dp; |
| 609 | int val, len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 610 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 611 | if (get_user(len, optlen)) |
| 612 | return -EFAULT; |
| 613 | |
Arnaldo Carvalho de Melo | 39ebc02 | 2007-03-28 11:54:32 -0700 | [diff] [blame] | 614 | if (len < (int)sizeof(int)) |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 615 | return -EINVAL; |
| 616 | |
| 617 | dp = dccp_sk(sk); |
| 618 | |
| 619 | switch (optname) { |
| 620 | case DCCP_SOCKOPT_PACKET_SIZE: |
Gerrit Renker | 5aed324 | 2006-11-28 19:33:36 -0200 | [diff] [blame] | 621 | DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); |
Arnaldo Carvalho de Melo | 841bac1 | 2006-11-28 19:42:03 -0200 | [diff] [blame] | 622 | return 0; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 623 | case DCCP_SOCKOPT_SERVICE: |
| 624 | return dccp_getsockopt_service(sk, len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 625 | (__be32 __user *)optval, optlen); |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 626 | case DCCP_SOCKOPT_GET_CUR_MPS: |
| 627 | val = dp->dccps_mss_cache; |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 628 | break; |
Gerrit Renker | d90ebcb | 2008-11-12 00:47:26 -0800 | [diff] [blame] | 629 | case DCCP_SOCKOPT_AVAILABLE_CCIDS: |
| 630 | return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen); |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 631 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 632 | val = dp->dccps_server_timewait; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 633 | break; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 634 | case DCCP_SOCKOPT_SEND_CSCOV: |
| 635 | val = dp->dccps_pcslen; |
| 636 | break; |
| 637 | case DCCP_SOCKOPT_RECV_CSCOV: |
| 638 | val = dp->dccps_pcrlen; |
| 639 | break; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 640 | case 128 ... 191: |
| 641 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, |
| 642 | len, (u32 __user *)optval, optlen); |
| 643 | case 192 ... 255: |
| 644 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, |
| 645 | len, (u32 __user *)optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 646 | default: |
| 647 | return -ENOPROTOOPT; |
| 648 | } |
| 649 | |
Gerrit Renker | 7913350 | 2007-12-13 12:27:14 -0200 | [diff] [blame] | 650 | len = sizeof(val); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 651 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) |
| 652 | return -EFAULT; |
| 653 | |
| 654 | return 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 657 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
| 658 | char __user *optval, int __user *optlen) |
| 659 | { |
| 660 | if (level != SOL_DCCP) |
| 661 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, |
| 662 | optname, optval, |
| 663 | optlen); |
| 664 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 665 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 666 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 667 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
| 668 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 669 | #ifdef CONFIG_COMPAT |
| 670 | int compat_dccp_getsockopt(struct sock *sk, int level, int optname, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 671 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 672 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 673 | if (level != SOL_DCCP) |
| 674 | return inet_csk_compat_getsockopt(sk, level, optname, |
| 675 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 676 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 677 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 678 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 679 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
| 680 | #endif |
| 681 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 682 | int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 683 | size_t len) |
| 684 | { |
| 685 | const struct dccp_sock *dp = dccp_sk(sk); |
| 686 | const int flags = msg->msg_flags; |
| 687 | const int noblock = flags & MSG_DONTWAIT; |
| 688 | struct sk_buff *skb; |
| 689 | int rc, size; |
| 690 | long timeo; |
| 691 | |
| 692 | if (len > dp->dccps_mss_cache) |
| 693 | return -EMSGSIZE; |
| 694 | |
| 695 | lock_sock(sk); |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 696 | |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 697 | if (sysctl_dccp_tx_qlen && |
| 698 | (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) { |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 699 | rc = -EAGAIN; |
| 700 | goto out_release; |
| 701 | } |
| 702 | |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 703 | timeo = sock_sndtimeo(sk, noblock); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 704 | |
| 705 | /* |
| 706 | * We have to use sk_stream_wait_connect here to set sk_write_pending, |
| 707 | * so that the trick in dccp_rcv_request_sent_state_process. |
| 708 | */ |
| 709 | /* Wait for a connection to finish. */ |
Gerrit Renker | cecd8d0 | 2007-09-26 19:36:08 -0300 | [diff] [blame] | 710 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN)) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 711 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 712 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 713 | |
| 714 | size = sk->sk_prot->max_header + len; |
| 715 | release_sock(sk); |
| 716 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
| 717 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 718 | if (skb == NULL) |
| 719 | goto out_release; |
| 720 | |
| 721 | skb_reserve(skb, sk->sk_prot->max_header); |
| 722 | rc = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len); |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 723 | if (rc != 0) |
| 724 | goto out_discard; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 725 | |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 726 | skb_queue_tail(&sk->sk_write_queue, skb); |
| 727 | dccp_write_xmit(sk,0); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 728 | out_release: |
| 729 | release_sock(sk); |
| 730 | return rc ? : len; |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 731 | out_discard: |
| 732 | kfree_skb(skb); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 733 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 734 | } |
| 735 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 736 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
| 737 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 738 | int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 739 | size_t len, int nonblock, int flags, int *addr_len) |
| 740 | { |
| 741 | const struct dccp_hdr *dh; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 742 | long timeo; |
| 743 | |
| 744 | lock_sock(sk); |
| 745 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 746 | if (sk->sk_state == DCCP_LISTEN) { |
| 747 | len = -ENOTCONN; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 748 | goto out; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 749 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 750 | |
| 751 | timeo = sock_rcvtimeo(sk, nonblock); |
| 752 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 753 | do { |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 754 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 755 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 756 | if (skb == NULL) |
| 757 | goto verify_sock_status; |
| 758 | |
| 759 | dh = dccp_hdr(skb); |
| 760 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 761 | switch (dh->dccph_type) { |
| 762 | case DCCP_PKT_DATA: |
| 763 | case DCCP_PKT_DATAACK: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 764 | goto found_ok_skb; |
| 765 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 766 | case DCCP_PKT_CLOSE: |
| 767 | case DCCP_PKT_CLOSEREQ: |
| 768 | if (!(flags & MSG_PEEK)) |
| 769 | dccp_finish_passive_close(sk); |
| 770 | /* fall through */ |
| 771 | case DCCP_PKT_RESET: |
| 772 | dccp_pr_debug("found fin (%s) ok!\n", |
| 773 | dccp_packet_name(dh->dccph_type)); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 774 | len = 0; |
| 775 | goto found_fin_ok; |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 776 | default: |
| 777 | dccp_pr_debug("packet_type=%s\n", |
| 778 | dccp_packet_name(dh->dccph_type)); |
| 779 | sk_eat_skb(sk, skb, 0); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 780 | } |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 781 | verify_sock_status: |
| 782 | if (sock_flag(sk, SOCK_DONE)) { |
| 783 | len = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 784 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 785 | } |
| 786 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 787 | if (sk->sk_err) { |
| 788 | len = sock_error(sk); |
| 789 | break; |
| 790 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 791 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 792 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
| 793 | len = 0; |
| 794 | break; |
| 795 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 796 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 797 | if (sk->sk_state == DCCP_CLOSED) { |
| 798 | if (!sock_flag(sk, SOCK_DONE)) { |
| 799 | /* This occurs when user tries to read |
| 800 | * from never connected socket. |
| 801 | */ |
| 802 | len = -ENOTCONN; |
| 803 | break; |
| 804 | } |
| 805 | len = 0; |
| 806 | break; |
| 807 | } |
| 808 | |
| 809 | if (!timeo) { |
| 810 | len = -EAGAIN; |
| 811 | break; |
| 812 | } |
| 813 | |
| 814 | if (signal_pending(current)) { |
| 815 | len = sock_intr_errno(timeo); |
| 816 | break; |
| 817 | } |
| 818 | |
| 819 | sk_wait_data(sk, &timeo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 820 | continue; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 821 | found_ok_skb: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 822 | if (len > skb->len) |
| 823 | len = skb->len; |
| 824 | else if (len < skb->len) |
| 825 | msg->msg_flags |= MSG_TRUNC; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 826 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 827 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { |
| 828 | /* Exception. Bailout! */ |
| 829 | len = -EFAULT; |
| 830 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 831 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 832 | found_fin_ok: |
| 833 | if (!(flags & MSG_PEEK)) |
Chris Leech | 624d116 | 2006-05-23 18:01:28 -0700 | [diff] [blame] | 834 | sk_eat_skb(sk, skb, 0); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 835 | break; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 836 | } while (1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 837 | out: |
| 838 | release_sock(sk); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 839 | return len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 840 | } |
| 841 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 842 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
| 843 | |
| 844 | int inet_dccp_listen(struct socket *sock, int backlog) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 845 | { |
| 846 | struct sock *sk = sock->sk; |
| 847 | unsigned char old_state; |
| 848 | int err; |
| 849 | |
| 850 | lock_sock(sk); |
| 851 | |
| 852 | err = -EINVAL; |
| 853 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) |
| 854 | goto out; |
| 855 | |
| 856 | old_state = sk->sk_state; |
| 857 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) |
| 858 | goto out; |
| 859 | |
| 860 | /* Really, if the socket is already in listen state |
| 861 | * we can only allow the backlog to be adjusted. |
| 862 | */ |
| 863 | if (old_state != DCCP_LISTEN) { |
| 864 | /* |
| 865 | * FIXME: here it probably should be sk->sk_prot->listen_start |
| 866 | * see tcp_listen_start |
| 867 | */ |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 868 | err = dccp_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 869 | if (err) |
| 870 | goto out; |
| 871 | } |
| 872 | sk->sk_max_ack_backlog = backlog; |
| 873 | err = 0; |
| 874 | |
| 875 | out: |
| 876 | release_sock(sk); |
| 877 | return err; |
| 878 | } |
| 879 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 880 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
| 881 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 882 | static void dccp_terminate_connection(struct sock *sk) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 883 | { |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 884 | u8 next_state = DCCP_CLOSED; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 885 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 886 | switch (sk->sk_state) { |
| 887 | case DCCP_PASSIVE_CLOSE: |
| 888 | case DCCP_PASSIVE_CLOSEREQ: |
| 889 | dccp_finish_passive_close(sk); |
| 890 | break; |
| 891 | case DCCP_PARTOPEN: |
| 892 | dccp_pr_debug("Stop PARTOPEN timer (%p)\n", sk); |
| 893 | inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK); |
| 894 | /* fall through */ |
| 895 | case DCCP_OPEN: |
| 896 | dccp_send_close(sk, 1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 897 | |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 898 | if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER && |
| 899 | !dccp_sk(sk)->dccps_server_timewait) |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 900 | next_state = DCCP_ACTIVE_CLOSEREQ; |
| 901 | else |
| 902 | next_state = DCCP_CLOSING; |
| 903 | /* fall through */ |
| 904 | default: |
| 905 | dccp_set_state(sk, next_state); |
| 906 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 907 | } |
| 908 | |
| 909 | void dccp_close(struct sock *sk, long timeout) |
| 910 | { |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 911 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 912 | struct sk_buff *skb; |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 913 | u32 data_was_unread = 0; |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 914 | int state; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 915 | |
| 916 | lock_sock(sk); |
| 917 | |
| 918 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 919 | |
| 920 | if (sk->sk_state == DCCP_LISTEN) { |
| 921 | dccp_set_state(sk, DCCP_CLOSED); |
| 922 | |
| 923 | /* Special case. */ |
| 924 | inet_csk_listen_stop(sk); |
| 925 | |
| 926 | goto adjudge_to_death; |
| 927 | } |
| 928 | |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 929 | sk_stop_timer(sk, &dp->dccps_xmit_timer); |
| 930 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 931 | /* |
| 932 | * We need to flush the recv. buffs. We do this only on the |
| 933 | * descriptor close, not protocol-sourced closes, because the |
| 934 | *reader process may not have drained the data yet! |
| 935 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 936 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 937 | data_was_unread += skb->len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 938 | __kfree_skb(skb); |
| 939 | } |
| 940 | |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 941 | if (data_was_unread) { |
| 942 | /* Unread data was tossed, send an appropriate Reset Code */ |
| 943 | DCCP_WARN("DCCP: ABORT -- %u bytes unread\n", data_was_unread); |
| 944 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 945 | dccp_set_state(sk, DCCP_CLOSED); |
| 946 | } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 947 | /* Check zero linger _after_ checking for unread data. */ |
| 948 | sk->sk_prot->disconnect(sk, 0); |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 949 | } else if (sk->sk_state != DCCP_CLOSED) { |
| 950 | dccp_terminate_connection(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 951 | } |
| 952 | |
| 953 | sk_stream_wait_close(sk, timeout); |
| 954 | |
| 955 | adjudge_to_death: |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 956 | state = sk->sk_state; |
| 957 | sock_hold(sk); |
| 958 | sock_orphan(sk); |
| 959 | atomic_inc(sk->sk_prot->orphan_count); |
| 960 | |
Arnaldo Carvalho de Melo | 7ad07e7 | 2005-08-23 21:50:06 -0700 | [diff] [blame] | 961 | /* |
| 962 | * It is the last release_sock in its life. It will remove backlog. |
| 963 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 964 | release_sock(sk); |
| 965 | /* |
| 966 | * Now socket is owned by kernel and we acquire BH lock |
| 967 | * to finish close. No need to check for user refs. |
| 968 | */ |
| 969 | local_bh_disable(); |
| 970 | bh_lock_sock(sk); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 971 | WARN_ON(sock_owned_by_user(sk)); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 972 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 973 | /* Have we already been destroyed by a softirq or backlog? */ |
| 974 | if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) |
| 975 | goto out; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 976 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 977 | if (sk->sk_state == DCCP_CLOSED) |
| 978 | inet_csk_destroy_sock(sk); |
| 979 | |
| 980 | /* Otherwise, socket is reprieved until protocol close. */ |
| 981 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 982 | out: |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 983 | bh_unlock_sock(sk); |
| 984 | local_bh_enable(); |
| 985 | sock_put(sk); |
| 986 | } |
| 987 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 988 | EXPORT_SYMBOL_GPL(dccp_close); |
| 989 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 990 | void dccp_shutdown(struct sock *sk, int how) |
| 991 | { |
Gerrit Renker | 8e8c71f | 2007-11-21 09:56:48 -0200 | [diff] [blame] | 992 | dccp_pr_debug("called shutdown(%x)\n", how); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 993 | } |
| 994 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 995 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
| 996 | |
YOSHIFUJI Hideaki | 24e8b7e | 2008-04-10 03:48:43 -0700 | [diff] [blame] | 997 | static inline int dccp_mib_init(void) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 998 | { |
YOSHIFUJI Hideaki | 24e8b7e | 2008-04-10 03:48:43 -0700 | [diff] [blame] | 999 | return snmp_mib_init((void**)dccp_statistics, sizeof(struct dccp_mib)); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1000 | } |
| 1001 | |
YOSHIFUJI Hideaki | 24e8b7e | 2008-04-10 03:48:43 -0700 | [diff] [blame] | 1002 | static inline void dccp_mib_exit(void) |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1003 | { |
YOSHIFUJI Hideaki | 24e8b7e | 2008-04-10 03:48:43 -0700 | [diff] [blame] | 1004 | snmp_mib_free((void**)dccp_statistics); |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1005 | } |
| 1006 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1007 | static int thash_entries; |
| 1008 | module_param(thash_entries, int, 0444); |
| 1009 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); |
| 1010 | |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1011 | #ifdef CONFIG_IP_DCCP_DEBUG |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1012 | int dccp_debug; |
Gerrit Renker | 4326499 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 1013 | module_param(dccp_debug, bool, 0644); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1014 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1015 | |
| 1016 | EXPORT_SYMBOL_GPL(dccp_debug); |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1017 | #endif |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1018 | |
| 1019 | static int __init dccp_init(void) |
| 1020 | { |
| 1021 | unsigned long goal; |
| 1022 | int ehash_order, bhash_order, i; |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1023 | int rc = -ENOBUFS; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1024 | |
Patrick McHardy | 028b027 | 2008-04-12 18:35:41 -0700 | [diff] [blame] | 1025 | BUILD_BUG_ON(sizeof(struct dccp_skb_cb) > |
| 1026 | FIELD_SIZEOF(struct sk_buff, cb)); |
| 1027 | |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 1028 | inet_hashinfo_init(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1029 | dccp_hashinfo.bind_bucket_cachep = |
| 1030 | kmem_cache_create("dccp_bind_bucket", |
| 1031 | sizeof(struct inet_bind_bucket), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1032 | SLAB_HWCACHE_ALIGN, NULL); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1033 | if (!dccp_hashinfo.bind_bucket_cachep) |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1034 | goto out; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1035 | |
| 1036 | /* |
| 1037 | * Size and allocate the main established and bind bucket |
| 1038 | * hash tables. |
| 1039 | * |
| 1040 | * The methodology is similar to that of the buffer cache. |
| 1041 | */ |
| 1042 | if (num_physpages >= (128 * 1024)) |
| 1043 | goal = num_physpages >> (21 - PAGE_SHIFT); |
| 1044 | else |
| 1045 | goal = num_physpages >> (23 - PAGE_SHIFT); |
| 1046 | |
| 1047 | if (thash_entries) |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1048 | goal = (thash_entries * |
| 1049 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1050 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
| 1051 | ; |
| 1052 | do { |
| 1053 | dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / |
| 1054 | sizeof(struct inet_ehash_bucket); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1055 | while (dccp_hashinfo.ehash_size & |
| 1056 | (dccp_hashinfo.ehash_size - 1)) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1057 | dccp_hashinfo.ehash_size--; |
| 1058 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) |
| 1059 | __get_free_pages(GFP_ATOMIC, ehash_order); |
| 1060 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); |
| 1061 | |
| 1062 | if (!dccp_hashinfo.ehash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1063 | DCCP_CRIT("Failed to allocate DCCP established hash table"); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1064 | goto out_free_bind_bucket_cachep; |
| 1065 | } |
| 1066 | |
Eric Dumazet | dbca9b275 | 2007-02-08 14:16:46 -0800 | [diff] [blame] | 1067 | for (i = 0; i < dccp_hashinfo.ehash_size; i++) { |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 1068 | INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i); |
| 1069 | INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].twchain, i); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1070 | } |
| 1071 | |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1072 | if (inet_ehash_locks_alloc(&dccp_hashinfo)) |
| 1073 | goto out_free_dccp_ehash; |
| 1074 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1075 | bhash_order = ehash_order; |
| 1076 | |
| 1077 | do { |
| 1078 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / |
| 1079 | sizeof(struct inet_bind_hashbucket); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1080 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
| 1081 | bhash_order > 0) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1082 | continue; |
| 1083 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) |
| 1084 | __get_free_pages(GFP_ATOMIC, bhash_order); |
| 1085 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); |
| 1086 | |
| 1087 | if (!dccp_hashinfo.bhash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1088 | DCCP_CRIT("Failed to allocate DCCP bind hash table"); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1089 | goto out_free_dccp_locks; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1090 | } |
| 1091 | |
| 1092 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { |
| 1093 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); |
| 1094 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); |
| 1095 | } |
| 1096 | |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1097 | rc = dccp_mib_init(); |
Arnaldo Carvalho de Melo | fa23e2e | 2006-03-20 17:16:01 -0800 | [diff] [blame] | 1098 | if (rc) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1099 | goto out_free_dccp_bhash; |
| 1100 | |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1101 | rc = dccp_ackvec_init(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1102 | if (rc) |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1103 | goto out_free_dccp_mib; |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1104 | |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1105 | rc = dccp_sysctl_init(); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1106 | if (rc) |
| 1107 | goto out_ackvec_exit; |
Gerrit Renker | 4c70f38 | 2007-09-25 22:40:13 -0700 | [diff] [blame] | 1108 | |
| 1109 | dccp_timestamping_init(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1110 | out: |
| 1111 | return rc; |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1112 | out_ackvec_exit: |
| 1113 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1114 | out_free_dccp_mib: |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1115 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1116 | out_free_dccp_bhash: |
| 1117 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); |
| 1118 | dccp_hashinfo.bhash = NULL; |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1119 | out_free_dccp_locks: |
| 1120 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1121 | out_free_dccp_ehash: |
| 1122 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); |
| 1123 | dccp_hashinfo.ehash = NULL; |
| 1124 | out_free_bind_bucket_cachep: |
| 1125 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
| 1126 | dccp_hashinfo.bind_bucket_cachep = NULL; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1127 | goto out; |
| 1128 | } |
| 1129 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1130 | static void __exit dccp_fini(void) |
| 1131 | { |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1132 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 725ba8e | 2005-08-13 20:35:39 -0300 | [diff] [blame] | 1133 | free_pages((unsigned long)dccp_hashinfo.bhash, |
| 1134 | get_order(dccp_hashinfo.bhash_size * |
| 1135 | sizeof(struct inet_bind_hashbucket))); |
| 1136 | free_pages((unsigned long)dccp_hashinfo.ehash, |
| 1137 | get_order(dccp_hashinfo.ehash_size * |
| 1138 | sizeof(struct inet_ehash_bucket))); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1139 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1140 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1141 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1142 | dccp_sysctl_exit(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | module_init(dccp_init); |
| 1146 | module_exit(dccp_fini); |
| 1147 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1148 | MODULE_LICENSE("GPL"); |
| 1149 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); |
| 1150 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |