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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 23 | #include <linux/slab.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 24 | #include <net/checksum.h> |
| 25 | |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 26 | #include <net/inet_sock.h> |
Eric Dumazet | 236b0d9 | 2017-08-16 07:03:15 -0700 | [diff] [blame] | 27 | #include <net/inet_common.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 28 | #include <net/sock.h> |
| 29 | #include <net/xfrm.h> |
| 30 | |
Arnaldo Carvalho de Melo | 6273172 | 2007-10-23 20:23:30 -0700 | [diff] [blame] | 31 | #include <asm/ioctls.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 32 | #include <linux/spinlock.h> |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/poll.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 36 | |
| 37 | #include "ccid.h" |
| 38 | #include "dccp.h" |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 39 | #include "feat.h" |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 40 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 41 | DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 42 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 43 | EXPORT_SYMBOL_GPL(dccp_statistics); |
| 44 | |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 45 | struct percpu_counter dccp_orphan_count; |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 46 | EXPORT_SYMBOL_GPL(dccp_orphan_count); |
| 47 | |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 48 | struct inet_hashinfo dccp_hashinfo; |
Arnaldo Carvalho de Melo | 075ae86 | 2006-03-20 21:24:19 -0800 | [diff] [blame] | 49 | EXPORT_SYMBOL_GPL(dccp_hashinfo); |
| 50 | |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 51 | /* the maximum queue length for tx in packets. 0 is no limit */ |
| 52 | int sysctl_dccp_tx_qlen __read_mostly = 5; |
| 53 | |
stephen hemminger | 1f4f0f6 | 2010-10-05 04:24:09 +0000 | [diff] [blame] | 54 | #ifdef CONFIG_IP_DCCP_DEBUG |
| 55 | static const char *dccp_state_name(const int state) |
| 56 | { |
| 57 | static const char *const dccp_state_names[] = { |
| 58 | [DCCP_OPEN] = "OPEN", |
| 59 | [DCCP_REQUESTING] = "REQUESTING", |
| 60 | [DCCP_PARTOPEN] = "PARTOPEN", |
| 61 | [DCCP_LISTEN] = "LISTEN", |
| 62 | [DCCP_RESPOND] = "RESPOND", |
| 63 | [DCCP_CLOSING] = "CLOSING", |
| 64 | [DCCP_ACTIVE_CLOSEREQ] = "CLOSEREQ", |
| 65 | [DCCP_PASSIVE_CLOSE] = "PASSIVE_CLOSE", |
| 66 | [DCCP_PASSIVE_CLOSEREQ] = "PASSIVE_CLOSEREQ", |
| 67 | [DCCP_TIME_WAIT] = "TIME_WAIT", |
| 68 | [DCCP_CLOSED] = "CLOSED", |
| 69 | }; |
| 70 | |
| 71 | if (state >= DCCP_MAX_STATES) |
| 72 | return "INVALID STATE!"; |
| 73 | else |
| 74 | return dccp_state_names[state]; |
| 75 | } |
| 76 | #endif |
| 77 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 78 | void dccp_set_state(struct sock *sk, const int state) |
| 79 | { |
| 80 | const int oldstate = sk->sk_state; |
| 81 | |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 82 | 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] | 83 | dccp_state_name(oldstate), dccp_state_name(state)); |
| 84 | WARN_ON(state == oldstate); |
| 85 | |
| 86 | switch (state) { |
| 87 | case DCCP_OPEN: |
| 88 | if (oldstate != DCCP_OPEN) |
| 89 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); |
Gerrit Renker | 6eb55d1 | 2008-12-08 01:15:26 -0800 | [diff] [blame] | 90 | /* Client retransmits all Confirm options until entering OPEN */ |
| 91 | if (oldstate == DCCP_PARTOPEN) |
| 92 | dccp_feat_list_purge(&dccp_sk(sk)->dccps_featneg); |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 93 | break; |
| 94 | |
| 95 | case DCCP_CLOSED: |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 96 | if (oldstate == DCCP_OPEN || oldstate == DCCP_ACTIVE_CLOSEREQ || |
| 97 | oldstate == DCCP_CLOSING) |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 98 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); |
| 99 | |
| 100 | sk->sk_prot->unhash(sk); |
| 101 | if (inet_csk(sk)->icsk_bind_hash != NULL && |
| 102 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 103 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 104 | /* fall through */ |
| 105 | default: |
| 106 | if (oldstate == DCCP_OPEN) |
| 107 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); |
| 108 | } |
| 109 | |
| 110 | /* Change state AFTER socket is unhashed to avoid closed |
| 111 | * socket sitting in hash tables. |
| 112 | */ |
| 113 | sk->sk_state = state; |
| 114 | } |
| 115 | |
| 116 | EXPORT_SYMBOL_GPL(dccp_set_state); |
| 117 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 118 | static void dccp_finish_passive_close(struct sock *sk) |
| 119 | { |
| 120 | switch (sk->sk_state) { |
| 121 | case DCCP_PASSIVE_CLOSE: |
| 122 | /* Node (client or server) has received Close packet. */ |
| 123 | dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED); |
| 124 | dccp_set_state(sk, DCCP_CLOSED); |
| 125 | break; |
| 126 | case DCCP_PASSIVE_CLOSEREQ: |
| 127 | /* |
| 128 | * Client received CloseReq. We set the `active' flag so that |
| 129 | * dccp_send_close() retransmits the Close as per RFC 4340, 8.3. |
| 130 | */ |
| 131 | dccp_send_close(sk, 1); |
| 132 | dccp_set_state(sk, DCCP_CLOSING); |
| 133 | } |
| 134 | } |
| 135 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 136 | void dccp_done(struct sock *sk) |
| 137 | { |
| 138 | dccp_set_state(sk, DCCP_CLOSED); |
| 139 | dccp_clear_xmit_timers(sk); |
| 140 | |
| 141 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 142 | |
| 143 | if (!sock_flag(sk, SOCK_DEAD)) |
| 144 | sk->sk_state_change(sk); |
| 145 | else |
| 146 | inet_csk_destroy_sock(sk); |
| 147 | } |
| 148 | |
| 149 | EXPORT_SYMBOL_GPL(dccp_done); |
| 150 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 151 | const char *dccp_packet_name(const int type) |
| 152 | { |
Jan Engelhardt | 36cbd3d | 2009-08-05 10:42:58 -0700 | [diff] [blame] | 153 | static const char *const dccp_packet_names[] = { |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 154 | [DCCP_PKT_REQUEST] = "REQUEST", |
| 155 | [DCCP_PKT_RESPONSE] = "RESPONSE", |
| 156 | [DCCP_PKT_DATA] = "DATA", |
| 157 | [DCCP_PKT_ACK] = "ACK", |
| 158 | [DCCP_PKT_DATAACK] = "DATAACK", |
| 159 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", |
| 160 | [DCCP_PKT_CLOSE] = "CLOSE", |
| 161 | [DCCP_PKT_RESET] = "RESET", |
| 162 | [DCCP_PKT_SYNC] = "SYNC", |
| 163 | [DCCP_PKT_SYNCACK] = "SYNCACK", |
| 164 | }; |
| 165 | |
| 166 | if (type >= DCCP_NR_PKT_TYPES) |
| 167 | return "INVALID"; |
| 168 | else |
| 169 | return dccp_packet_names[type]; |
| 170 | } |
| 171 | |
| 172 | EXPORT_SYMBOL_GPL(dccp_packet_name); |
| 173 | |
Eric Dumazet | 236b0d9 | 2017-08-16 07:03:15 -0700 | [diff] [blame] | 174 | static void dccp_sk_destruct(struct sock *sk) |
| 175 | { |
| 176 | struct dccp_sock *dp = dccp_sk(sk); |
| 177 | |
| 178 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); |
| 179 | dp->dccps_hc_tx_ccid = NULL; |
| 180 | inet_sock_destruct(sk); |
| 181 | } |
| 182 | |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 183 | 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] | 184 | { |
| 185 | struct dccp_sock *dp = dccp_sk(sk); |
| 186 | struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 187 | |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 188 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; |
| 189 | icsk->icsk_syn_retries = sysctl_dccp_request_retries; |
| 190 | sk->sk_state = DCCP_CLOSED; |
| 191 | sk->sk_write_space = dccp_write_space; |
Eric Dumazet | 236b0d9 | 2017-08-16 07:03:15 -0700 | [diff] [blame] | 192 | sk->sk_destruct = dccp_sk_destruct; |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 193 | icsk->icsk_sync_mss = dccp_sync_mss; |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 194 | dp->dccps_mss_cache = 536; |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 195 | dp->dccps_rate_last = jiffies; |
| 196 | dp->dccps_role = DCCP_ROLE_UNDEFINED; |
| 197 | dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 198 | dp->dccps_tx_qlen = sysctl_dccp_tx_qlen; |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 199 | |
| 200 | dccp_init_xmit_timers(sk); |
| 201 | |
Gerrit Renker | ac75773 | 2008-11-04 23:55:49 -0800 | [diff] [blame] | 202 | INIT_LIST_HEAD(&dp->dccps_featneg); |
Gerrit Renker | 6eb55d1 | 2008-12-08 01:15:26 -0800 | [diff] [blame] | 203 | /* control socket doesn't need feat nego */ |
| 204 | if (likely(ctl_sock_initialized)) |
| 205 | return dccp_feat_init(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 206 | return 0; |
| 207 | } |
| 208 | |
| 209 | EXPORT_SYMBOL_GPL(dccp_init_sock); |
| 210 | |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 211 | void dccp_destroy_sock(struct sock *sk) |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 212 | { |
| 213 | struct dccp_sock *dp = dccp_sk(sk); |
| 214 | |
Eric Dumazet | b31cbe2 | 2017-08-14 14:10:25 -0700 | [diff] [blame] | 215 | __skb_queue_purge(&sk->sk_write_queue); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 216 | if (sk->sk_send_head != NULL) { |
| 217 | kfree_skb(sk->sk_send_head); |
| 218 | sk->sk_send_head = NULL; |
| 219 | } |
| 220 | |
| 221 | /* Clean up a referenced DCCP bind bucket. */ |
| 222 | if (inet_csk(sk)->icsk_bind_hash != NULL) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 223 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 224 | |
| 225 | kfree(dp->dccps_service_list); |
| 226 | dp->dccps_service_list = NULL; |
| 227 | |
Gerrit Renker | 6fdd34d | 2008-12-08 01:19:06 -0800 | [diff] [blame] | 228 | if (dp->dccps_hc_rx_ackvec != NULL) { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 229 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
| 230 | dp->dccps_hc_rx_ackvec = NULL; |
| 231 | } |
| 232 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
Eric Dumazet | 236b0d9 | 2017-08-16 07:03:15 -0700 | [diff] [blame] | 233 | dp->dccps_hc_rx_ccid = NULL; |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 234 | |
| 235 | /* clean up feature negotiation state */ |
Gerrit Renker | d99a7bd | 2008-11-04 23:56:30 -0800 | [diff] [blame] | 236 | dccp_feat_list_purge(&dp->dccps_featneg); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 237 | } |
| 238 | |
| 239 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); |
| 240 | |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 241 | 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] | 242 | { |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 243 | struct dccp_sock *dp = dccp_sk(sk); |
| 244 | |
| 245 | dp->dccps_role = DCCP_ROLE_LISTEN; |
Gerrit Renker | 9eca0a4 | 2008-11-12 00:48:44 -0800 | [diff] [blame] | 246 | /* do not start to listen if feature negotiation setup fails */ |
| 247 | if (dccp_feat_finalise_settings(dp)) |
| 248 | return -EPROTO; |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 249 | return inet_csk_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 252 | static inline int dccp_need_reset(int state) |
| 253 | { |
| 254 | return state != DCCP_CLOSED && state != DCCP_LISTEN && |
| 255 | state != DCCP_REQUESTING; |
| 256 | } |
| 257 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 258 | int dccp_disconnect(struct sock *sk, int flags) |
| 259 | { |
| 260 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 261 | struct inet_sock *inet = inet_sk(sk); |
Mohamed Ghannam | 7e2fb80 | 2017-12-05 20:58:35 +0000 | [diff] [blame] | 262 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 263 | int err = 0; |
| 264 | const int old_state = sk->sk_state; |
| 265 | |
| 266 | if (old_state != DCCP_CLOSED) |
| 267 | dccp_set_state(sk, DCCP_CLOSED); |
| 268 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 269 | /* |
| 270 | * This corresponds to the ABORT function of RFC793, sec. 3.8 |
| 271 | * TCP uses a RST segment, DCCP a Reset packet with Code 2, "Aborted". |
| 272 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 273 | if (old_state == DCCP_LISTEN) { |
| 274 | inet_csk_listen_stop(sk); |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 275 | } else if (dccp_need_reset(old_state)) { |
| 276 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 277 | sk->sk_err = ECONNRESET; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 278 | } else if (old_state == DCCP_REQUESTING) |
| 279 | sk->sk_err = ECONNRESET; |
| 280 | |
| 281 | dccp_clear_xmit_timers(sk); |
Mohamed Ghannam | 7e2fb80 | 2017-12-05 20:58:35 +0000 | [diff] [blame] | 282 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
Mohamed Ghannam | 7e2fb80 | 2017-12-05 20:58:35 +0000 | [diff] [blame] | 283 | dp->dccps_hc_rx_ccid = NULL; |
Gerrit Renker | 4881632 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 284 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 285 | __skb_queue_purge(&sk->sk_receive_queue); |
Gerrit Renker | 4881632 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 286 | __skb_queue_purge(&sk->sk_write_queue); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 287 | if (sk->sk_send_head != NULL) { |
| 288 | __kfree_skb(sk->sk_send_head); |
| 289 | sk->sk_send_head = NULL; |
| 290 | } |
| 291 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 292 | inet->inet_dport = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 293 | |
| 294 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) |
| 295 | inet_reset_saddr(sk); |
| 296 | |
| 297 | sk->sk_shutdown = 0; |
| 298 | sock_reset_flag(sk, SOCK_DONE); |
| 299 | |
| 300 | icsk->icsk_backoff = 0; |
| 301 | inet_csk_delack_init(sk); |
| 302 | __sk_dst_reset(sk); |
| 303 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 304 | WARN_ON(inet->inet_num && !icsk->icsk_bind_hash); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 305 | |
| 306 | sk->sk_error_report(sk); |
| 307 | return err; |
| 308 | } |
| 309 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 310 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
| 311 | |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 312 | /* |
| 313 | * Wait for a DCCP event. |
| 314 | * |
| 315 | * Note that we don't need to lock the socket, as the upper poll layers |
| 316 | * take care of normal races (between the test and the event) and we don't |
| 317 | * go look at any of the socket buffers directly. |
| 318 | */ |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 319 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
| 320 | poll_table *wait) |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 321 | { |
| 322 | unsigned int mask; |
| 323 | struct sock *sk = sock->sk; |
| 324 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 325 | sock_poll_wait(file, sk_sleep(sk), wait); |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 326 | if (sk->sk_state == DCCP_LISTEN) |
| 327 | return inet_csk_listen_poll(sk); |
| 328 | |
| 329 | /* Socket is not locked. We are protected from async events |
| 330 | by poll logic and correct handling of state changes |
| 331 | made by another threads is impossible in any case. |
| 332 | */ |
| 333 | |
| 334 | mask = 0; |
| 335 | if (sk->sk_err) |
| 336 | mask = POLLERR; |
| 337 | |
| 338 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) |
| 339 | mask |= POLLHUP; |
| 340 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
Davide Libenzi | f348d70 | 2006-03-25 03:07:39 -0800 | [diff] [blame] | 341 | mask |= POLLIN | POLLRDNORM | POLLRDHUP; |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 342 | |
| 343 | /* Connected? */ |
| 344 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { |
| 345 | if (atomic_read(&sk->sk_rmem_alloc) > 0) |
| 346 | mask |= POLLIN | POLLRDNORM; |
| 347 | |
| 348 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { |
Eric Dumazet | 64dc613 | 2013-07-22 20:26:31 -0700 | [diff] [blame] | 349 | if (sk_stream_is_writeable(sk)) { |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 350 | mask |= POLLOUT | POLLWRNORM; |
| 351 | } else { /* send SIGIO later */ |
Eric Dumazet | 9cd3e07 | 2015-11-29 20:03:10 -0800 | [diff] [blame] | 352 | sk_set_bit(SOCKWQ_ASYNC_NOSPACE, sk); |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 353 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 354 | |
| 355 | /* Race breaker. If space is freed after |
| 356 | * wspace test but before the flags are set, |
| 357 | * IO signal will be lost. |
| 358 | */ |
Eric Dumazet | 64dc613 | 2013-07-22 20:26:31 -0700 | [diff] [blame] | 359 | if (sk_stream_is_writeable(sk)) |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 360 | mask |= POLLOUT | POLLWRNORM; |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | return mask; |
| 365 | } |
| 366 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 367 | EXPORT_SYMBOL_GPL(dccp_poll); |
| 368 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 369 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 370 | { |
Arnaldo Carvalho de Melo | 6273172 | 2007-10-23 20:23:30 -0700 | [diff] [blame] | 371 | int rc = -ENOTCONN; |
| 372 | |
| 373 | lock_sock(sk); |
| 374 | |
| 375 | if (sk->sk_state == DCCP_LISTEN) |
| 376 | goto out; |
| 377 | |
| 378 | switch (cmd) { |
| 379 | case SIOCINQ: { |
| 380 | struct sk_buff *skb; |
| 381 | unsigned long amount = 0; |
| 382 | |
| 383 | skb = skb_peek(&sk->sk_receive_queue); |
| 384 | if (skb != NULL) { |
| 385 | /* |
| 386 | * We will only return the amount of this packet since |
| 387 | * that is all that will be read. |
| 388 | */ |
| 389 | amount = skb->len; |
| 390 | } |
| 391 | rc = put_user(amount, (int __user *)arg); |
| 392 | } |
| 393 | break; |
| 394 | default: |
| 395 | rc = -ENOIOCTLCMD; |
| 396 | break; |
| 397 | } |
| 398 | out: |
| 399 | release_sock(sk); |
| 400 | return rc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 401 | } |
| 402 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 403 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
| 404 | |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 405 | static int dccp_setsockopt_service(struct sock *sk, const __be32 service, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 406 | char __user *optval, unsigned int optlen) |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 407 | { |
| 408 | struct dccp_sock *dp = dccp_sk(sk); |
| 409 | struct dccp_service_list *sl = NULL; |
| 410 | |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 411 | if (service == DCCP_SERVICE_INVALID_VALUE || |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 412 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) |
| 413 | return -EINVAL; |
| 414 | |
| 415 | if (optlen > sizeof(service)) { |
| 416 | sl = kmalloc(optlen, GFP_KERNEL); |
| 417 | if (sl == NULL) |
| 418 | return -ENOMEM; |
| 419 | |
| 420 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; |
| 421 | if (copy_from_user(sl->dccpsl_list, |
| 422 | optval + sizeof(service), |
| 423 | optlen - sizeof(service)) || |
| 424 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { |
| 425 | kfree(sl); |
| 426 | return -EFAULT; |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | lock_sock(sk); |
| 431 | dp->dccps_service = service; |
| 432 | |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 433 | kfree(dp->dccps_service_list); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 434 | |
| 435 | dp->dccps_service_list = sl; |
| 436 | release_sock(sk); |
| 437 | return 0; |
| 438 | } |
| 439 | |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 440 | static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx) |
| 441 | { |
| 442 | u8 *list, len; |
| 443 | int i, rc; |
| 444 | |
| 445 | if (cscov < 0 || cscov > 15) |
| 446 | return -EINVAL; |
| 447 | /* |
| 448 | * Populate a list of permissible values, in the range cscov...15. This |
| 449 | * is necessary since feature negotiation of single values only works if |
| 450 | * both sides incidentally choose the same value. Since the list starts |
| 451 | * lowest-value first, negotiation will pick the smallest shared value. |
| 452 | */ |
| 453 | if (cscov == 0) |
| 454 | return 0; |
| 455 | len = 16 - cscov; |
| 456 | |
| 457 | list = kmalloc(len, GFP_KERNEL); |
| 458 | if (list == NULL) |
| 459 | return -ENOBUFS; |
| 460 | |
| 461 | for (i = 0; i < len; i++) |
| 462 | list[i] = cscov++; |
| 463 | |
| 464 | rc = dccp_feat_register_sp(sk, DCCPF_MIN_CSUM_COVER, rx, list, len); |
| 465 | |
| 466 | if (rc == 0) { |
| 467 | if (rx) |
| 468 | dccp_sk(sk)->dccps_pcrlen = cscov; |
| 469 | else |
| 470 | dccp_sk(sk)->dccps_pcslen = cscov; |
| 471 | } |
| 472 | kfree(list); |
| 473 | return rc; |
| 474 | } |
| 475 | |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 476 | static int dccp_setsockopt_ccid(struct sock *sk, int type, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 477 | char __user *optval, unsigned int optlen) |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 478 | { |
| 479 | u8 *val; |
| 480 | int rc = 0; |
| 481 | |
| 482 | if (optlen < 1 || optlen > DCCP_FEAT_MAX_SP_VALS) |
| 483 | return -EINVAL; |
| 484 | |
Julia Lawall | 042604d | 2010-05-21 22:25:19 +0000 | [diff] [blame] | 485 | val = memdup_user(optval, optlen); |
| 486 | if (IS_ERR(val)) |
| 487 | return PTR_ERR(val); |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 488 | |
| 489 | lock_sock(sk); |
| 490 | if (type == DCCP_SOCKOPT_TX_CCID || type == DCCP_SOCKOPT_CCID) |
| 491 | rc = dccp_feat_register_sp(sk, DCCPF_CCID, 1, val, optlen); |
| 492 | |
| 493 | if (!rc && (type == DCCP_SOCKOPT_RX_CCID || type == DCCP_SOCKOPT_CCID)) |
| 494 | rc = dccp_feat_register_sp(sk, DCCPF_CCID, 0, val, optlen); |
| 495 | release_sock(sk); |
| 496 | |
| 497 | kfree(val); |
| 498 | return rc; |
| 499 | } |
| 500 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 501 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 502 | char __user *optval, unsigned int optlen) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 503 | { |
Gerrit Renker | 09dbc38 | 2006-11-14 12:57:34 -0200 | [diff] [blame] | 504 | struct dccp_sock *dp = dccp_sk(sk); |
| 505 | int val, err = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 506 | |
Gerrit Renker | 1910299 | 2008-11-16 22:56:55 -0800 | [diff] [blame] | 507 | switch (optname) { |
| 508 | case DCCP_SOCKOPT_PACKET_SIZE: |
| 509 | DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n"); |
| 510 | return 0; |
| 511 | case DCCP_SOCKOPT_CHANGE_L: |
| 512 | case DCCP_SOCKOPT_CHANGE_R: |
| 513 | DCCP_WARN("sockopt(CHANGE_L/R) is deprecated: fix your app\n"); |
| 514 | return 0; |
Gerrit Renker | b20a9c2 | 2008-11-23 16:02:31 -0800 | [diff] [blame] | 515 | case DCCP_SOCKOPT_CCID: |
| 516 | case DCCP_SOCKOPT_RX_CCID: |
| 517 | case DCCP_SOCKOPT_TX_CCID: |
| 518 | return dccp_setsockopt_ccid(sk, optname, optval, optlen); |
Gerrit Renker | 1910299 | 2008-11-16 22:56:55 -0800 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | if (optlen < (int)sizeof(int)) |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 522 | return -EINVAL; |
| 523 | |
| 524 | if (get_user(val, (int __user *)optval)) |
| 525 | return -EFAULT; |
| 526 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 527 | if (optname == DCCP_SOCKOPT_SERVICE) |
| 528 | return dccp_setsockopt_service(sk, val, optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 529 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 530 | lock_sock(sk); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 531 | switch (optname) { |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 532 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 533 | if (dp->dccps_role != DCCP_ROLE_SERVER) |
| 534 | err = -EOPNOTSUPP; |
| 535 | else |
| 536 | dp->dccps_server_timewait = (val != 0); |
| 537 | break; |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 538 | case DCCP_SOCKOPT_SEND_CSCOV: |
| 539 | err = dccp_setsockopt_cscov(sk, val, false); |
Tomasz Grobelny | d6da351 | 2008-09-04 07:30:19 +0200 | [diff] [blame] | 540 | break; |
Gerrit Renker | 2945055 | 2008-11-16 22:53:48 -0800 | [diff] [blame] | 541 | case DCCP_SOCKOPT_RECV_CSCOV: |
| 542 | err = dccp_setsockopt_cscov(sk, val, true); |
Tomasz Grobelny | d6da351 | 2008-09-04 07:30:19 +0200 | [diff] [blame] | 543 | break; |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 544 | case DCCP_SOCKOPT_QPOLICY_ID: |
| 545 | if (sk->sk_state != DCCP_CLOSED) |
| 546 | err = -EISCONN; |
| 547 | else if (val < 0 || val >= DCCPQ_POLICY_MAX) |
| 548 | err = -EINVAL; |
| 549 | else |
| 550 | dp->dccps_qpolicy = val; |
| 551 | break; |
| 552 | case DCCP_SOCKOPT_QPOLICY_TXQLEN: |
| 553 | if (val < 0) |
| 554 | err = -EINVAL; |
| 555 | else |
| 556 | dp->dccps_tx_qlen = val; |
| 557 | break; |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 558 | default: |
| 559 | err = -ENOPROTOOPT; |
| 560 | break; |
| 561 | } |
Gerrit Renker | 410e27a | 2008-09-09 13:27:22 +0200 | [diff] [blame] | 562 | release_sock(sk); |
Gerrit Renker | 1910299 | 2008-11-16 22:56:55 -0800 | [diff] [blame] | 563 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 564 | return err; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 565 | } |
| 566 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 567 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 568 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 569 | { |
| 570 | if (level != SOL_DCCP) |
| 571 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, |
| 572 | optname, optval, |
| 573 | optlen); |
| 574 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 575 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 576 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 577 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
| 578 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 579 | #ifdef CONFIG_COMPAT |
| 580 | int compat_dccp_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 581 | char __user *optval, unsigned int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 582 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 583 | if (level != SOL_DCCP) |
| 584 | return inet_csk_compat_setsockopt(sk, level, optname, |
| 585 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 586 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 587 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 588 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 589 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
| 590 | #endif |
| 591 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 592 | static int dccp_getsockopt_service(struct sock *sk, int len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 593 | __be32 __user *optval, |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 594 | int __user *optlen) |
| 595 | { |
| 596 | const struct dccp_sock *dp = dccp_sk(sk); |
| 597 | const struct dccp_service_list *sl; |
| 598 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); |
| 599 | |
| 600 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 601 | if ((sl = dp->dccps_service_list) != NULL) { |
| 602 | slen = sl->dccpsl_nr * sizeof(u32); |
| 603 | total_len += slen; |
| 604 | } |
| 605 | |
| 606 | err = -EINVAL; |
| 607 | if (total_len > len) |
| 608 | goto out; |
| 609 | |
| 610 | err = 0; |
| 611 | if (put_user(total_len, optlen) || |
| 612 | put_user(dp->dccps_service, optval) || |
| 613 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) |
| 614 | err = -EFAULT; |
| 615 | out: |
| 616 | release_sock(sk); |
| 617 | return err; |
| 618 | } |
| 619 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 620 | 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] | 621 | char __user *optval, int __user *optlen) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 622 | { |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 623 | struct dccp_sock *dp; |
| 624 | int val, len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 625 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 626 | if (get_user(len, optlen)) |
| 627 | return -EFAULT; |
| 628 | |
Arnaldo Carvalho de Melo | 39ebc02 | 2007-03-28 11:54:32 -0700 | [diff] [blame] | 629 | if (len < (int)sizeof(int)) |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 630 | return -EINVAL; |
| 631 | |
| 632 | dp = dccp_sk(sk); |
| 633 | |
| 634 | switch (optname) { |
| 635 | case DCCP_SOCKOPT_PACKET_SIZE: |
Gerrit Renker | 5aed324 | 2006-11-28 19:33:36 -0200 | [diff] [blame] | 636 | 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] | 637 | return 0; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 638 | case DCCP_SOCKOPT_SERVICE: |
| 639 | return dccp_getsockopt_service(sk, len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 640 | (__be32 __user *)optval, optlen); |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 641 | case DCCP_SOCKOPT_GET_CUR_MPS: |
| 642 | val = dp->dccps_mss_cache; |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 643 | break; |
Gerrit Renker | d90ebcb | 2008-11-12 00:47:26 -0800 | [diff] [blame] | 644 | case DCCP_SOCKOPT_AVAILABLE_CCIDS: |
| 645 | return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen); |
Gerrit Renker | 71c262a | 2008-11-23 16:04:59 -0800 | [diff] [blame] | 646 | case DCCP_SOCKOPT_TX_CCID: |
| 647 | val = ccid_get_current_tx_ccid(dp); |
| 648 | if (val < 0) |
| 649 | return -ENOPROTOOPT; |
| 650 | break; |
| 651 | case DCCP_SOCKOPT_RX_CCID: |
| 652 | val = ccid_get_current_rx_ccid(dp); |
| 653 | if (val < 0) |
| 654 | return -ENOPROTOOPT; |
| 655 | break; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 656 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 657 | val = dp->dccps_server_timewait; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 658 | break; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 659 | case DCCP_SOCKOPT_SEND_CSCOV: |
| 660 | val = dp->dccps_pcslen; |
| 661 | break; |
| 662 | case DCCP_SOCKOPT_RECV_CSCOV: |
| 663 | val = dp->dccps_pcrlen; |
| 664 | break; |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 665 | case DCCP_SOCKOPT_QPOLICY_ID: |
| 666 | val = dp->dccps_qpolicy; |
| 667 | break; |
| 668 | case DCCP_SOCKOPT_QPOLICY_TXQLEN: |
| 669 | val = dp->dccps_tx_qlen; |
| 670 | break; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 671 | case 128 ... 191: |
| 672 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, |
| 673 | len, (u32 __user *)optval, optlen); |
| 674 | case 192 ... 255: |
| 675 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, |
| 676 | len, (u32 __user *)optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 677 | default: |
| 678 | return -ENOPROTOOPT; |
| 679 | } |
| 680 | |
Gerrit Renker | 7913350 | 2007-12-13 12:27:14 -0200 | [diff] [blame] | 681 | len = sizeof(val); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 682 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) |
| 683 | return -EFAULT; |
| 684 | |
| 685 | return 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 686 | } |
| 687 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 688 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
| 689 | char __user *optval, int __user *optlen) |
| 690 | { |
| 691 | if (level != SOL_DCCP) |
| 692 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, |
| 693 | optname, optval, |
| 694 | optlen); |
| 695 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 696 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 697 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 698 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
| 699 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 700 | #ifdef CONFIG_COMPAT |
| 701 | 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] | 702 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 703 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 704 | if (level != SOL_DCCP) |
| 705 | return inet_csk_compat_getsockopt(sk, level, optname, |
| 706 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 707 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 708 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 709 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 710 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
| 711 | #endif |
| 712 | |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 713 | static int dccp_msghdr_parse(struct msghdr *msg, struct sk_buff *skb) |
| 714 | { |
Gu Zheng | f95b414 | 2014-12-11 11:22:04 +0800 | [diff] [blame] | 715 | struct cmsghdr *cmsg; |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 716 | |
| 717 | /* |
| 718 | * Assign an (opaque) qpolicy priority value to skb->priority. |
| 719 | * |
| 720 | * We are overloading this skb field for use with the qpolicy subystem. |
| 721 | * The skb->priority is normally used for the SO_PRIORITY option, which |
| 722 | * is initialised from sk_priority. Since the assignment of sk_priority |
| 723 | * to skb->priority happens later (on layer 3), we overload this field |
| 724 | * for use with queueing priorities as long as the skb is on layer 4. |
| 725 | * The default priority value (if nothing is set) is 0. |
| 726 | */ |
| 727 | skb->priority = 0; |
| 728 | |
Gu Zheng | f95b414 | 2014-12-11 11:22:04 +0800 | [diff] [blame] | 729 | for_each_cmsghdr(cmsg, msg) { |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 730 | if (!CMSG_OK(msg, cmsg)) |
| 731 | return -EINVAL; |
| 732 | |
| 733 | if (cmsg->cmsg_level != SOL_DCCP) |
| 734 | continue; |
| 735 | |
Tomasz Grobelny | 0491026 | 2010-12-04 13:39:13 +0100 | [diff] [blame] | 736 | if (cmsg->cmsg_type <= DCCP_SCM_QPOLICY_MAX && |
| 737 | !dccp_qpolicy_param_ok(skb->sk, cmsg->cmsg_type)) |
| 738 | return -EINVAL; |
| 739 | |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 740 | switch (cmsg->cmsg_type) { |
| 741 | case DCCP_SCM_PRIORITY: |
| 742 | if (cmsg->cmsg_len != CMSG_LEN(sizeof(__u32))) |
| 743 | return -EINVAL; |
| 744 | skb->priority = *(__u32 *)CMSG_DATA(cmsg); |
| 745 | break; |
| 746 | default: |
| 747 | return -EINVAL; |
| 748 | } |
| 749 | } |
| 750 | return 0; |
| 751 | } |
| 752 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 753 | int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 754 | { |
| 755 | const struct dccp_sock *dp = dccp_sk(sk); |
| 756 | const int flags = msg->msg_flags; |
| 757 | const int noblock = flags & MSG_DONTWAIT; |
| 758 | struct sk_buff *skb; |
| 759 | int rc, size; |
| 760 | long timeo; |
| 761 | |
| 762 | if (len > dp->dccps_mss_cache) |
| 763 | return -EMSGSIZE; |
| 764 | |
| 765 | lock_sock(sk); |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 766 | |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 767 | if (dccp_qpolicy_full(sk)) { |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 768 | rc = -EAGAIN; |
| 769 | goto out_release; |
| 770 | } |
| 771 | |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 772 | timeo = sock_sndtimeo(sk, noblock); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 773 | |
| 774 | /* |
| 775 | * We have to use sk_stream_wait_connect here to set sk_write_pending, |
| 776 | * so that the trick in dccp_rcv_request_sent_state_process. |
| 777 | */ |
| 778 | /* Wait for a connection to finish. */ |
Gerrit Renker | cecd8d0 | 2007-09-26 19:36:08 -0300 | [diff] [blame] | 779 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN)) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 780 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 781 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 782 | |
| 783 | size = sk->sk_prot->max_header + len; |
| 784 | release_sock(sk); |
| 785 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
| 786 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 787 | if (skb == NULL) |
| 788 | goto out_release; |
| 789 | |
Alexey Kodanev | 1fdc00c | 2018-03-06 22:57:01 +0300 | [diff] [blame] | 790 | if (sk->sk_state == DCCP_CLOSED) { |
| 791 | rc = -ENOTCONN; |
| 792 | goto out_discard; |
| 793 | } |
| 794 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 795 | skb_reserve(skb, sk->sk_prot->max_header); |
Al Viro | 6ce8e9c | 2014-04-06 21:25:44 -0400 | [diff] [blame] | 796 | rc = memcpy_from_msg(skb_put(skb, len), msg, len); |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 797 | if (rc != 0) |
| 798 | goto out_discard; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 799 | |
Tomasz Grobelny | 871a2c1 | 2010-12-04 13:38:01 +0100 | [diff] [blame] | 800 | rc = dccp_msghdr_parse(msg, skb); |
| 801 | if (rc != 0) |
| 802 | goto out_discard; |
| 803 | |
| 804 | dccp_qpolicy_push(sk, skb); |
Gerrit Renker | b1fcf55 | 2010-10-27 19:16:27 +0000 | [diff] [blame] | 805 | /* |
| 806 | * The xmit_timer is set if the TX CCID is rate-based and will expire |
| 807 | * when congestion control permits to release further packets into the |
| 808 | * network. Window-based CCIDs do not use this timer. |
| 809 | */ |
| 810 | if (!timer_pending(&dp->dccps_xmit_timer)) |
| 811 | dccp_write_xmit(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 812 | out_release: |
| 813 | release_sock(sk); |
| 814 | return rc ? : len; |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 815 | out_discard: |
| 816 | kfree_skb(skb); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 817 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 818 | } |
| 819 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 820 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
| 821 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 822 | int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock, |
| 823 | int flags, int *addr_len) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 824 | { |
| 825 | const struct dccp_hdr *dh; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 826 | long timeo; |
| 827 | |
| 828 | lock_sock(sk); |
| 829 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 830 | if (sk->sk_state == DCCP_LISTEN) { |
| 831 | len = -ENOTCONN; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 832 | goto out; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 833 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 834 | |
| 835 | timeo = sock_rcvtimeo(sk, nonblock); |
| 836 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 837 | do { |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 838 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 839 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 840 | if (skb == NULL) |
| 841 | goto verify_sock_status; |
| 842 | |
| 843 | dh = dccp_hdr(skb); |
| 844 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 845 | switch (dh->dccph_type) { |
| 846 | case DCCP_PKT_DATA: |
| 847 | case DCCP_PKT_DATAACK: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 848 | goto found_ok_skb; |
| 849 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 850 | case DCCP_PKT_CLOSE: |
| 851 | case DCCP_PKT_CLOSEREQ: |
| 852 | if (!(flags & MSG_PEEK)) |
| 853 | dccp_finish_passive_close(sk); |
| 854 | /* fall through */ |
| 855 | case DCCP_PKT_RESET: |
| 856 | dccp_pr_debug("found fin (%s) ok!\n", |
| 857 | dccp_packet_name(dh->dccph_type)); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 858 | len = 0; |
| 859 | goto found_fin_ok; |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 860 | default: |
| 861 | dccp_pr_debug("packet_type=%s\n", |
| 862 | dccp_packet_name(dh->dccph_type)); |
Dan Williams | 7bced39 | 2013-12-30 12:37:29 -0800 | [diff] [blame] | 863 | sk_eat_skb(sk, skb); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 864 | } |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 865 | verify_sock_status: |
| 866 | if (sock_flag(sk, SOCK_DONE)) { |
| 867 | len = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 868 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 869 | } |
| 870 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 871 | if (sk->sk_err) { |
| 872 | len = sock_error(sk); |
| 873 | break; |
| 874 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 875 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 876 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
| 877 | len = 0; |
| 878 | break; |
| 879 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 880 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 881 | if (sk->sk_state == DCCP_CLOSED) { |
| 882 | if (!sock_flag(sk, SOCK_DONE)) { |
| 883 | /* This occurs when user tries to read |
| 884 | * from never connected socket. |
| 885 | */ |
| 886 | len = -ENOTCONN; |
| 887 | break; |
| 888 | } |
| 889 | len = 0; |
| 890 | break; |
| 891 | } |
| 892 | |
| 893 | if (!timeo) { |
| 894 | len = -EAGAIN; |
| 895 | break; |
| 896 | } |
| 897 | |
| 898 | if (signal_pending(current)) { |
| 899 | len = sock_intr_errno(timeo); |
| 900 | break; |
| 901 | } |
| 902 | |
Sabrina Dubroca | dfbafc9 | 2015-07-24 18:19:25 +0200 | [diff] [blame] | 903 | sk_wait_data(sk, &timeo, NULL); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 904 | continue; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 905 | found_ok_skb: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 906 | if (len > skb->len) |
| 907 | len = skb->len; |
| 908 | else if (len < skb->len) |
| 909 | msg->msg_flags |= MSG_TRUNC; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 910 | |
David S. Miller | 51f3d02 | 2014-11-05 16:46:40 -0500 | [diff] [blame] | 911 | if (skb_copy_datagram_msg(skb, 0, msg, len)) { |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 912 | /* Exception. Bailout! */ |
| 913 | len = -EFAULT; |
| 914 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 915 | } |
Gerrit Renker | 55d9559 | 2010-02-10 20:26:18 +0000 | [diff] [blame] | 916 | if (flags & MSG_TRUNC) |
| 917 | len = skb->len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 918 | found_fin_ok: |
| 919 | if (!(flags & MSG_PEEK)) |
Dan Williams | 7bced39 | 2013-12-30 12:37:29 -0800 | [diff] [blame] | 920 | sk_eat_skb(sk, skb); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 921 | break; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 922 | } while (1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 923 | out: |
| 924 | release_sock(sk); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 925 | return len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 926 | } |
| 927 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 928 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
| 929 | |
| 930 | int inet_dccp_listen(struct socket *sock, int backlog) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 931 | { |
| 932 | struct sock *sk = sock->sk; |
| 933 | unsigned char old_state; |
| 934 | int err; |
| 935 | |
| 936 | lock_sock(sk); |
| 937 | |
| 938 | err = -EINVAL; |
| 939 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) |
| 940 | goto out; |
| 941 | |
| 942 | old_state = sk->sk_state; |
| 943 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) |
| 944 | goto out; |
| 945 | |
| 946 | /* Really, if the socket is already in listen state |
| 947 | * we can only allow the backlog to be adjusted. |
| 948 | */ |
| 949 | if (old_state != DCCP_LISTEN) { |
| 950 | /* |
| 951 | * FIXME: here it probably should be sk->sk_prot->listen_start |
| 952 | * see tcp_listen_start |
| 953 | */ |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 954 | err = dccp_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 955 | if (err) |
| 956 | goto out; |
| 957 | } |
| 958 | sk->sk_max_ack_backlog = backlog; |
| 959 | err = 0; |
| 960 | |
| 961 | out: |
| 962 | release_sock(sk); |
| 963 | return err; |
| 964 | } |
| 965 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 966 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
| 967 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 968 | static void dccp_terminate_connection(struct sock *sk) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 969 | { |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 970 | u8 next_state = DCCP_CLOSED; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 971 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 972 | switch (sk->sk_state) { |
| 973 | case DCCP_PASSIVE_CLOSE: |
| 974 | case DCCP_PASSIVE_CLOSEREQ: |
| 975 | dccp_finish_passive_close(sk); |
| 976 | break; |
| 977 | case DCCP_PARTOPEN: |
| 978 | dccp_pr_debug("Stop PARTOPEN timer (%p)\n", sk); |
| 979 | inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK); |
| 980 | /* fall through */ |
| 981 | case DCCP_OPEN: |
| 982 | dccp_send_close(sk, 1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 983 | |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 984 | if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER && |
| 985 | !dccp_sk(sk)->dccps_server_timewait) |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 986 | next_state = DCCP_ACTIVE_CLOSEREQ; |
| 987 | else |
| 988 | next_state = DCCP_CLOSING; |
| 989 | /* fall through */ |
| 990 | default: |
| 991 | dccp_set_state(sk, next_state); |
| 992 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 993 | } |
| 994 | |
| 995 | void dccp_close(struct sock *sk, long timeout) |
| 996 | { |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 997 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 998 | struct sk_buff *skb; |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 999 | u32 data_was_unread = 0; |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 1000 | int state; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1001 | |
| 1002 | lock_sock(sk); |
| 1003 | |
| 1004 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 1005 | |
| 1006 | if (sk->sk_state == DCCP_LISTEN) { |
| 1007 | dccp_set_state(sk, DCCP_CLOSED); |
| 1008 | |
| 1009 | /* Special case. */ |
| 1010 | inet_csk_listen_stop(sk); |
| 1011 | |
| 1012 | goto adjudge_to_death; |
| 1013 | } |
| 1014 | |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 1015 | sk_stop_timer(sk, &dp->dccps_xmit_timer); |
| 1016 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1017 | /* |
| 1018 | * We need to flush the recv. buffs. We do this only on the |
| 1019 | * descriptor close, not protocol-sourced closes, because the |
| 1020 | *reader process may not have drained the data yet! |
| 1021 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1022 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 1023 | data_was_unread += skb->len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1024 | __kfree_skb(skb); |
| 1025 | } |
| 1026 | |
Eric Dumazet | 346da62 | 2016-11-02 18:04:24 -0700 | [diff] [blame] | 1027 | /* If socket has been already reset kill it. */ |
| 1028 | if (sk->sk_state == DCCP_CLOSED) |
| 1029 | goto adjudge_to_death; |
| 1030 | |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 1031 | if (data_was_unread) { |
| 1032 | /* Unread data was tossed, send an appropriate Reset Code */ |
Gerrit Renker | 2f34b32 | 2010-10-11 20:44:42 +0200 | [diff] [blame] | 1033 | DCCP_WARN("ABORT with %u bytes unread\n", data_was_unread); |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 1034 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 1035 | dccp_set_state(sk, DCCP_CLOSED); |
| 1036 | } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1037 | /* Check zero linger _after_ checking for unread data. */ |
| 1038 | sk->sk_prot->disconnect(sk, 0); |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 1039 | } else if (sk->sk_state != DCCP_CLOSED) { |
Gerrit Renker | b1fcf55 | 2010-10-27 19:16:27 +0000 | [diff] [blame] | 1040 | /* |
| 1041 | * Normal connection termination. May need to wait if there are |
| 1042 | * still packets in the TX queue that are delayed by the CCID. |
| 1043 | */ |
| 1044 | dccp_flush_write_queue(sk, &timeout); |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 1045 | dccp_terminate_connection(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1046 | } |
| 1047 | |
Gerrit Renker | b1fcf55 | 2010-10-27 19:16:27 +0000 | [diff] [blame] | 1048 | /* |
| 1049 | * Flush write queue. This may be necessary in several cases: |
| 1050 | * - we have been closed by the peer but still have application data; |
| 1051 | * - abortive termination (unread data or zero linger time), |
| 1052 | * - normal termination but queue could not be flushed within time limit |
| 1053 | */ |
| 1054 | __skb_queue_purge(&sk->sk_write_queue); |
| 1055 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1056 | sk_stream_wait_close(sk, timeout); |
| 1057 | |
| 1058 | adjudge_to_death: |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 1059 | state = sk->sk_state; |
| 1060 | sock_hold(sk); |
| 1061 | sock_orphan(sk); |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 1062 | |
Arnaldo Carvalho de Melo | 7ad07e7 | 2005-08-23 21:50:06 -0700 | [diff] [blame] | 1063 | /* |
| 1064 | * It is the last release_sock in its life. It will remove backlog. |
| 1065 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1066 | release_sock(sk); |
| 1067 | /* |
| 1068 | * Now socket is owned by kernel and we acquire BH lock |
| 1069 | * to finish close. No need to check for user refs. |
| 1070 | */ |
| 1071 | local_bh_disable(); |
| 1072 | bh_lock_sock(sk); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 1073 | WARN_ON(sock_owned_by_user(sk)); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1074 | |
Herbert Xu | eb4dea5 | 2008-12-29 23:04:08 -0800 | [diff] [blame] | 1075 | percpu_counter_inc(sk->sk_prot->orphan_count); |
| 1076 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 1077 | /* Have we already been destroyed by a softirq or backlog? */ |
| 1078 | if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) |
| 1079 | goto out; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1080 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1081 | if (sk->sk_state == DCCP_CLOSED) |
| 1082 | inet_csk_destroy_sock(sk); |
| 1083 | |
| 1084 | /* Otherwise, socket is reprieved until protocol close. */ |
| 1085 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 1086 | out: |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1087 | bh_unlock_sock(sk); |
| 1088 | local_bh_enable(); |
| 1089 | sock_put(sk); |
| 1090 | } |
| 1091 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1092 | EXPORT_SYMBOL_GPL(dccp_close); |
| 1093 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1094 | void dccp_shutdown(struct sock *sk, int how) |
| 1095 | { |
Gerrit Renker | 8e8c71f | 2007-11-21 09:56:48 -0200 | [diff] [blame] | 1096 | dccp_pr_debug("called shutdown(%x)\n", how); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1097 | } |
| 1098 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1099 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
| 1100 | |
Fabian Frederick | 0c5b8a4 | 2014-10-01 06:48:03 +0200 | [diff] [blame] | 1101 | static inline int __init dccp_mib_init(void) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1102 | { |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1103 | dccp_statistics = alloc_percpu(struct dccp_mib); |
| 1104 | if (!dccp_statistics) |
| 1105 | return -ENOMEM; |
| 1106 | return 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1107 | } |
| 1108 | |
YOSHIFUJI Hideaki | 24e8b7e | 2008-04-10 03:48:43 -0700 | [diff] [blame] | 1109 | static inline void dccp_mib_exit(void) |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1110 | { |
WANG Cong | 698365f | 2014-05-05 15:55:55 -0700 | [diff] [blame] | 1111 | free_percpu(dccp_statistics); |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1112 | } |
| 1113 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1114 | static int thash_entries; |
| 1115 | module_param(thash_entries, int, 0444); |
| 1116 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); |
| 1117 | |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1118 | #ifdef CONFIG_IP_DCCP_DEBUG |
Rusty Russell | eb93992 | 2011-12-19 14:08:01 +0000 | [diff] [blame] | 1119 | bool dccp_debug; |
Gerrit Renker | 4326499 | 2008-08-23 13:28:27 +0200 | [diff] [blame] | 1120 | module_param(dccp_debug, bool, 0644); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1121 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1122 | |
| 1123 | EXPORT_SYMBOL_GPL(dccp_debug); |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1124 | #endif |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1125 | |
| 1126 | static int __init dccp_init(void) |
| 1127 | { |
| 1128 | unsigned long goal; |
| 1129 | int ehash_order, bhash_order, i; |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 1130 | int rc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1131 | |
Patrick McHardy | 028b027 | 2008-04-12 18:35:41 -0700 | [diff] [blame] | 1132 | BUILD_BUG_ON(sizeof(struct dccp_skb_cb) > |
| 1133 | FIELD_SIZEOF(struct sk_buff, cb)); |
Tejun Heo | 908c7f1 | 2014-09-08 09:51:29 +0900 | [diff] [blame] | 1134 | rc = percpu_counter_init(&dccp_orphan_count, 0, GFP_KERNEL); |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 1135 | if (rc) |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1136 | goto out_fail; |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 1137 | rc = -ENOBUFS; |
Eric Dumazet | 5caea4e | 2008-11-20 00:40:07 -0800 | [diff] [blame] | 1138 | inet_hashinfo_init(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1139 | dccp_hashinfo.bind_bucket_cachep = |
| 1140 | kmem_cache_create("dccp_bind_bucket", |
| 1141 | sizeof(struct inet_bind_bucket), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1142 | SLAB_HWCACHE_ALIGN, NULL); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1143 | if (!dccp_hashinfo.bind_bucket_cachep) |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 1144 | goto out_free_percpu; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1145 | |
| 1146 | /* |
| 1147 | * Size and allocate the main established and bind bucket |
| 1148 | * hash tables. |
| 1149 | * |
| 1150 | * The methodology is similar to that of the buffer cache. |
| 1151 | */ |
Jan Beulich | 4481374 | 2009-09-21 17:03:05 -0700 | [diff] [blame] | 1152 | if (totalram_pages >= (128 * 1024)) |
| 1153 | goal = totalram_pages >> (21 - PAGE_SHIFT); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1154 | else |
Jan Beulich | 4481374 | 2009-09-21 17:03:05 -0700 | [diff] [blame] | 1155 | goal = totalram_pages >> (23 - PAGE_SHIFT); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1156 | |
| 1157 | if (thash_entries) |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1158 | goal = (thash_entries * |
| 1159 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1160 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
| 1161 | ; |
| 1162 | do { |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 1163 | unsigned long hash_size = (1UL << ehash_order) * PAGE_SIZE / |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1164 | sizeof(struct inet_ehash_bucket); |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 1165 | |
| 1166 | while (hash_size & (hash_size - 1)) |
| 1167 | hash_size--; |
| 1168 | dccp_hashinfo.ehash_mask = hash_size - 1; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1169 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) |
Mel Gorman | 1c29b3f | 2009-07-29 15:04:10 -0700 | [diff] [blame] | 1170 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, ehash_order); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1171 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); |
| 1172 | |
| 1173 | if (!dccp_hashinfo.ehash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1174 | DCCP_CRIT("Failed to allocate DCCP established hash table"); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1175 | goto out_free_bind_bucket_cachep; |
| 1176 | } |
| 1177 | |
Eric Dumazet | 05dbc7b | 2013-10-03 00:22:02 -0700 | [diff] [blame] | 1178 | for (i = 0; i <= dccp_hashinfo.ehash_mask; i++) |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 1179 | INIT_HLIST_NULLS_HEAD(&dccp_hashinfo.ehash[i].chain, i); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1180 | |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1181 | if (inet_ehash_locks_alloc(&dccp_hashinfo)) |
| 1182 | goto out_free_dccp_ehash; |
| 1183 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1184 | bhash_order = ehash_order; |
| 1185 | |
| 1186 | do { |
| 1187 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / |
| 1188 | sizeof(struct inet_bind_hashbucket); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1189 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
| 1190 | bhash_order > 0) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1191 | continue; |
| 1192 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) |
Mel Gorman | 1c29b3f | 2009-07-29 15:04:10 -0700 | [diff] [blame] | 1193 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, bhash_order); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1194 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); |
| 1195 | |
| 1196 | if (!dccp_hashinfo.bhash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1197 | DCCP_CRIT("Failed to allocate DCCP bind hash table"); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1198 | goto out_free_dccp_locks; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1199 | } |
| 1200 | |
| 1201 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { |
| 1202 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); |
| 1203 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); |
| 1204 | } |
| 1205 | |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1206 | rc = dccp_mib_init(); |
Arnaldo Carvalho de Melo | fa23e2e | 2006-03-20 17:16:01 -0800 | [diff] [blame] | 1207 | if (rc) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1208 | goto out_free_dccp_bhash; |
| 1209 | |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1210 | rc = dccp_ackvec_init(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1211 | if (rc) |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1212 | goto out_free_dccp_mib; |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1213 | |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1214 | rc = dccp_sysctl_init(); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1215 | if (rc) |
| 1216 | goto out_ackvec_exit; |
Gerrit Renker | 4c70f38 | 2007-09-25 22:40:13 -0700 | [diff] [blame] | 1217 | |
Gerrit Renker | ddebc97 | 2009-01-04 21:42:53 -0800 | [diff] [blame] | 1218 | rc = ccid_initialize_builtins(); |
| 1219 | if (rc) |
| 1220 | goto out_sysctl_exit; |
| 1221 | |
Gerrit Renker | 4c70f38 | 2007-09-25 22:40:13 -0700 | [diff] [blame] | 1222 | dccp_timestamping_init(); |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1223 | |
| 1224 | return 0; |
| 1225 | |
Gerrit Renker | ddebc97 | 2009-01-04 21:42:53 -0800 | [diff] [blame] | 1226 | out_sysctl_exit: |
| 1227 | dccp_sysctl_exit(); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1228 | out_ackvec_exit: |
| 1229 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1230 | out_free_dccp_mib: |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1231 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1232 | out_free_dccp_bhash: |
| 1233 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1234 | out_free_dccp_locks: |
| 1235 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1236 | out_free_dccp_ehash: |
| 1237 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1238 | out_free_bind_bucket_cachep: |
| 1239 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
Eric Dumazet | dd24c00 | 2008-11-25 21:17:14 -0800 | [diff] [blame] | 1240 | out_free_percpu: |
| 1241 | percpu_counter_destroy(&dccp_orphan_count); |
Gerrit Renker | d14a0eb | 2010-03-14 20:13:19 +0000 | [diff] [blame] | 1242 | out_fail: |
| 1243 | dccp_hashinfo.bhash = NULL; |
| 1244 | dccp_hashinfo.ehash = NULL; |
| 1245 | dccp_hashinfo.bind_bucket_cachep = NULL; |
| 1246 | return rc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1247 | } |
| 1248 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1249 | static void __exit dccp_fini(void) |
| 1250 | { |
Gerrit Renker | ddebc97 | 2009-01-04 21:42:53 -0800 | [diff] [blame] | 1251 | ccid_cleanup_builtins(); |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1252 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 725ba8e | 2005-08-13 20:35:39 -0300 | [diff] [blame] | 1253 | free_pages((unsigned long)dccp_hashinfo.bhash, |
| 1254 | get_order(dccp_hashinfo.bhash_size * |
| 1255 | sizeof(struct inet_bind_hashbucket))); |
| 1256 | free_pages((unsigned long)dccp_hashinfo.ehash, |
Eric Dumazet | f373b53 | 2009-10-09 00:16:19 +0000 | [diff] [blame] | 1257 | get_order((dccp_hashinfo.ehash_mask + 1) * |
Arnaldo Carvalho de Melo | 725ba8e | 2005-08-13 20:35:39 -0300 | [diff] [blame] | 1258 | sizeof(struct inet_ehash_bucket))); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1259 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1260 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1261 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1262 | dccp_sysctl_exit(); |
Wei Yongjun | 476181c | 2009-08-04 21:44:39 +0000 | [diff] [blame] | 1263 | percpu_counter_destroy(&dccp_orphan_count); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1264 | } |
| 1265 | |
| 1266 | module_init(dccp_init); |
| 1267 | module_exit(dccp_fini); |
| 1268 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1269 | MODULE_LICENSE("GPL"); |
| 1270 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); |
| 1271 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |