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 <asm/semaphore.h> |
| 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/timer.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/poll.h> |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 35 | |
| 36 | #include "ccid.h" |
| 37 | #include "dccp.h" |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 38 | #include "feat.h" |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 39 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 40 | DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 41 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 42 | EXPORT_SYMBOL_GPL(dccp_statistics); |
| 43 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 44 | atomic_t dccp_orphan_count = ATOMIC_INIT(0); |
| 45 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 46 | EXPORT_SYMBOL_GPL(dccp_orphan_count); |
| 47 | |
Arnaldo Carvalho de Melo | 075ae86 | 2006-03-20 21:24:19 -0800 | [diff] [blame] | 48 | struct inet_hashinfo __cacheline_aligned dccp_hashinfo = { |
| 49 | .lhash_lock = RW_LOCK_UNLOCKED, |
| 50 | .lhash_users = ATOMIC_INIT(0), |
| 51 | .lhash_wait = __WAIT_QUEUE_HEAD_INITIALIZER(dccp_hashinfo.lhash_wait), |
| 52 | }; |
| 53 | |
| 54 | EXPORT_SYMBOL_GPL(dccp_hashinfo); |
| 55 | |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 56 | /* the maximum queue length for tx in packets. 0 is no limit */ |
| 57 | int sysctl_dccp_tx_qlen __read_mostly = 5; |
| 58 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 59 | void dccp_set_state(struct sock *sk, const int state) |
| 60 | { |
| 61 | const int oldstate = sk->sk_state; |
| 62 | |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 63 | 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] | 64 | dccp_state_name(oldstate), dccp_state_name(state)); |
| 65 | WARN_ON(state == oldstate); |
| 66 | |
| 67 | switch (state) { |
| 68 | case DCCP_OPEN: |
| 69 | if (oldstate != DCCP_OPEN) |
| 70 | DCCP_INC_STATS(DCCP_MIB_CURRESTAB); |
| 71 | break; |
| 72 | |
| 73 | case DCCP_CLOSED: |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 74 | if (oldstate == DCCP_OPEN || oldstate == DCCP_ACTIVE_CLOSEREQ || |
| 75 | oldstate == DCCP_CLOSING) |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 76 | DCCP_INC_STATS(DCCP_MIB_ESTABRESETS); |
| 77 | |
| 78 | sk->sk_prot->unhash(sk); |
| 79 | if (inet_csk(sk)->icsk_bind_hash != NULL && |
| 80 | !(sk->sk_userlocks & SOCK_BINDPORT_LOCK)) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 81 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 82 | /* fall through */ |
| 83 | default: |
| 84 | if (oldstate == DCCP_OPEN) |
| 85 | DCCP_DEC_STATS(DCCP_MIB_CURRESTAB); |
| 86 | } |
| 87 | |
| 88 | /* Change state AFTER socket is unhashed to avoid closed |
| 89 | * socket sitting in hash tables. |
| 90 | */ |
| 91 | sk->sk_state = state; |
| 92 | } |
| 93 | |
| 94 | EXPORT_SYMBOL_GPL(dccp_set_state); |
| 95 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 96 | static void dccp_finish_passive_close(struct sock *sk) |
| 97 | { |
| 98 | switch (sk->sk_state) { |
| 99 | case DCCP_PASSIVE_CLOSE: |
| 100 | /* Node (client or server) has received Close packet. */ |
| 101 | dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED); |
| 102 | dccp_set_state(sk, DCCP_CLOSED); |
| 103 | break; |
| 104 | case DCCP_PASSIVE_CLOSEREQ: |
| 105 | /* |
| 106 | * Client received CloseReq. We set the `active' flag so that |
| 107 | * dccp_send_close() retransmits the Close as per RFC 4340, 8.3. |
| 108 | */ |
| 109 | dccp_send_close(sk, 1); |
| 110 | dccp_set_state(sk, DCCP_CLOSING); |
| 111 | } |
| 112 | } |
| 113 | |
Arnaldo Carvalho de Melo | c25a18b | 2006-03-20 21:58:56 -0800 | [diff] [blame] | 114 | void dccp_done(struct sock *sk) |
| 115 | { |
| 116 | dccp_set_state(sk, DCCP_CLOSED); |
| 117 | dccp_clear_xmit_timers(sk); |
| 118 | |
| 119 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 120 | |
| 121 | if (!sock_flag(sk, SOCK_DEAD)) |
| 122 | sk->sk_state_change(sk); |
| 123 | else |
| 124 | inet_csk_destroy_sock(sk); |
| 125 | } |
| 126 | |
| 127 | EXPORT_SYMBOL_GPL(dccp_done); |
| 128 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 129 | const char *dccp_packet_name(const int type) |
| 130 | { |
| 131 | static const char *dccp_packet_names[] = { |
| 132 | [DCCP_PKT_REQUEST] = "REQUEST", |
| 133 | [DCCP_PKT_RESPONSE] = "RESPONSE", |
| 134 | [DCCP_PKT_DATA] = "DATA", |
| 135 | [DCCP_PKT_ACK] = "ACK", |
| 136 | [DCCP_PKT_DATAACK] = "DATAACK", |
| 137 | [DCCP_PKT_CLOSEREQ] = "CLOSEREQ", |
| 138 | [DCCP_PKT_CLOSE] = "CLOSE", |
| 139 | [DCCP_PKT_RESET] = "RESET", |
| 140 | [DCCP_PKT_SYNC] = "SYNC", |
| 141 | [DCCP_PKT_SYNCACK] = "SYNCACK", |
| 142 | }; |
| 143 | |
| 144 | if (type >= DCCP_NR_PKT_TYPES) |
| 145 | return "INVALID"; |
| 146 | else |
| 147 | return dccp_packet_names[type]; |
| 148 | } |
| 149 | |
| 150 | EXPORT_SYMBOL_GPL(dccp_packet_name); |
| 151 | |
| 152 | const char *dccp_state_name(const int state) |
| 153 | { |
| 154 | static char *dccp_state_names[] = { |
Gerrit Renker | f11135a | 2007-11-28 11:34:53 -0200 | [diff] [blame] | 155 | [DCCP_OPEN] = "OPEN", |
| 156 | [DCCP_REQUESTING] = "REQUESTING", |
| 157 | [DCCP_PARTOPEN] = "PARTOPEN", |
| 158 | [DCCP_LISTEN] = "LISTEN", |
| 159 | [DCCP_RESPOND] = "RESPOND", |
| 160 | [DCCP_CLOSING] = "CLOSING", |
| 161 | [DCCP_ACTIVE_CLOSEREQ] = "CLOSEREQ", |
| 162 | [DCCP_PASSIVE_CLOSE] = "PASSIVE_CLOSE", |
| 163 | [DCCP_PASSIVE_CLOSEREQ] = "PASSIVE_CLOSEREQ", |
| 164 | [DCCP_TIME_WAIT] = "TIME_WAIT", |
| 165 | [DCCP_CLOSED] = "CLOSED", |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 166 | }; |
| 167 | |
| 168 | if (state >= DCCP_MAX_STATES) |
| 169 | return "INVALID STATE!"; |
| 170 | else |
| 171 | return dccp_state_names[state]; |
| 172 | } |
| 173 | |
| 174 | EXPORT_SYMBOL_GPL(dccp_state_name); |
| 175 | |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 176 | 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] | 177 | { |
| 178 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 179 | struct dccp_minisock *dmsk = dccp_msk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 180 | struct inet_connection_sock *icsk = inet_csk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 181 | |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 182 | dccp_minisock_init(&dp->dccps_minisock); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 183 | |
Arnaldo Carvalho de Melo | e18d7a9 | 2007-11-24 21:42:53 -0200 | [diff] [blame] | 184 | icsk->icsk_rto = DCCP_TIMEOUT_INIT; |
| 185 | icsk->icsk_syn_retries = sysctl_dccp_request_retries; |
| 186 | sk->sk_state = DCCP_CLOSED; |
| 187 | sk->sk_write_space = dccp_write_space; |
| 188 | icsk->icsk_sync_mss = dccp_sync_mss; |
| 189 | dp->dccps_mss_cache = 536; |
| 190 | dp->dccps_rate_last = jiffies; |
| 191 | dp->dccps_role = DCCP_ROLE_UNDEFINED; |
| 192 | dp->dccps_service = DCCP_SERVICE_CODE_IS_ABSENT; |
| 193 | dp->dccps_l_ack_ratio = dp->dccps_r_ack_ratio = 1; |
| 194 | |
| 195 | dccp_init_xmit_timers(sk); |
| 196 | |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 197 | /* |
| 198 | * FIXME: We're hardcoding the CCID, and doing this at this point makes |
| 199 | * the listening (master) sock get CCID control blocks, which is not |
| 200 | * necessary, but for now, to not mess with the test userspace apps, |
| 201 | * lets leave it here, later the real solution is to do this in a |
| 202 | * setsockopt(CCIDs-I-want/accept). -acme |
| 203 | */ |
Arnaldo Carvalho de Melo | 7247887 | 2006-03-20 22:00:37 -0800 | [diff] [blame] | 204 | if (likely(ctl_sock_initialized)) { |
Arnaldo Carvalho de Melo | 8ca0d17 | 2006-03-20 22:51:53 -0800 | [diff] [blame] | 205 | int rc = dccp_feat_init(dmsk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 206 | |
| 207 | if (rc) |
| 208 | return rc; |
| 209 | |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 210 | if (dmsk->dccpms_send_ack_vector) { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 211 | dp->dccps_hc_rx_ackvec = dccp_ackvec_alloc(GFP_KERNEL); |
| 212 | if (dp->dccps_hc_rx_ackvec == NULL) |
| 213 | return -ENOMEM; |
| 214 | } |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 215 | dp->dccps_hc_rx_ccid = ccid_hc_rx_new(dmsk->dccpms_rx_ccid, |
| 216 | sk, GFP_KERNEL); |
| 217 | dp->dccps_hc_tx_ccid = ccid_hc_tx_new(dmsk->dccpms_tx_ccid, |
| 218 | sk, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 219 | if (unlikely(dp->dccps_hc_rx_ccid == NULL || |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 220 | dp->dccps_hc_tx_ccid == NULL)) { |
| 221 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
| 222 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 223 | if (dmsk->dccpms_send_ack_vector) { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 224 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
| 225 | dp->dccps_hc_rx_ackvec = NULL; |
| 226 | } |
| 227 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; |
| 228 | return -ENOMEM; |
| 229 | } |
| 230 | } else { |
| 231 | /* control socket doesn't need feat nego */ |
Arnaldo Carvalho de Melo | a4bf390 | 2006-03-20 22:50:58 -0800 | [diff] [blame] | 232 | INIT_LIST_HEAD(&dmsk->dccpms_pending); |
| 233 | INIT_LIST_HEAD(&dmsk->dccpms_conf); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 234 | } |
| 235 | |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | EXPORT_SYMBOL_GPL(dccp_init_sock); |
| 240 | |
| 241 | int dccp_destroy_sock(struct sock *sk) |
| 242 | { |
| 243 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | 8ca0d17 | 2006-03-20 22:51:53 -0800 | [diff] [blame] | 244 | struct dccp_minisock *dmsk = dccp_msk(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 245 | |
| 246 | /* |
| 247 | * DCCP doesn't use sk_write_queue, just sk_send_head |
| 248 | * for retransmissions |
| 249 | */ |
| 250 | if (sk->sk_send_head != NULL) { |
| 251 | kfree_skb(sk->sk_send_head); |
| 252 | sk->sk_send_head = NULL; |
| 253 | } |
| 254 | |
| 255 | /* Clean up a referenced DCCP bind bucket. */ |
| 256 | if (inet_csk(sk)->icsk_bind_hash != NULL) |
Arnaldo Carvalho de Melo | ab1e0a1 | 2008-02-03 04:06:04 -0800 | [diff] [blame] | 257 | inet_put_port(sk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 258 | |
| 259 | kfree(dp->dccps_service_list); |
| 260 | dp->dccps_service_list = NULL; |
| 261 | |
Arnaldo Carvalho de Melo | 8ca0d17 | 2006-03-20 22:51:53 -0800 | [diff] [blame] | 262 | if (dmsk->dccpms_send_ack_vector) { |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 263 | dccp_ackvec_free(dp->dccps_hc_rx_ackvec); |
| 264 | dp->dccps_hc_rx_ackvec = NULL; |
| 265 | } |
| 266 | ccid_hc_rx_delete(dp->dccps_hc_rx_ccid, sk); |
| 267 | ccid_hc_tx_delete(dp->dccps_hc_tx_ccid, sk); |
| 268 | dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL; |
| 269 | |
| 270 | /* clean up feature negotiation state */ |
Arnaldo Carvalho de Melo | 8ca0d17 | 2006-03-20 22:51:53 -0800 | [diff] [blame] | 271 | dccp_feat_clean(dmsk); |
Arnaldo Carvalho de Melo | 3e0fadc | 2006-03-20 21:23:15 -0800 | [diff] [blame] | 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | EXPORT_SYMBOL_GPL(dccp_destroy_sock); |
| 277 | |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 278 | 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] | 279 | { |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 280 | struct dccp_sock *dp = dccp_sk(sk); |
| 281 | |
| 282 | dp->dccps_role = DCCP_ROLE_LISTEN; |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 283 | return inet_csk_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 284 | } |
| 285 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 286 | static inline int dccp_need_reset(int state) |
| 287 | { |
| 288 | return state != DCCP_CLOSED && state != DCCP_LISTEN && |
| 289 | state != DCCP_REQUESTING; |
| 290 | } |
| 291 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 292 | int dccp_disconnect(struct sock *sk, int flags) |
| 293 | { |
| 294 | struct inet_connection_sock *icsk = inet_csk(sk); |
| 295 | struct inet_sock *inet = inet_sk(sk); |
| 296 | int err = 0; |
| 297 | const int old_state = sk->sk_state; |
| 298 | |
| 299 | if (old_state != DCCP_CLOSED) |
| 300 | dccp_set_state(sk, DCCP_CLOSED); |
| 301 | |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 302 | /* |
| 303 | * This corresponds to the ABORT function of RFC793, sec. 3.8 |
| 304 | * TCP uses a RST segment, DCCP a Reset packet with Code 2, "Aborted". |
| 305 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 306 | if (old_state == DCCP_LISTEN) { |
| 307 | inet_csk_listen_stop(sk); |
Gerrit Renker | ce865a6 | 2007-11-24 22:14:15 -0200 | [diff] [blame] | 308 | } else if (dccp_need_reset(old_state)) { |
| 309 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 310 | sk->sk_err = ECONNRESET; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 311 | } else if (old_state == DCCP_REQUESTING) |
| 312 | sk->sk_err = ECONNRESET; |
| 313 | |
| 314 | dccp_clear_xmit_timers(sk); |
| 315 | __skb_queue_purge(&sk->sk_receive_queue); |
| 316 | if (sk->sk_send_head != NULL) { |
| 317 | __kfree_skb(sk->sk_send_head); |
| 318 | sk->sk_send_head = NULL; |
| 319 | } |
| 320 | |
| 321 | inet->dport = 0; |
| 322 | |
| 323 | if (!(sk->sk_userlocks & SOCK_BINDADDR_LOCK)) |
| 324 | inet_reset_saddr(sk); |
| 325 | |
| 326 | sk->sk_shutdown = 0; |
| 327 | sock_reset_flag(sk, SOCK_DONE); |
| 328 | |
| 329 | icsk->icsk_backoff = 0; |
| 330 | inet_csk_delack_init(sk); |
| 331 | __sk_dst_reset(sk); |
| 332 | |
| 333 | BUG_TRAP(!inet->num || icsk->icsk_bind_hash); |
| 334 | |
| 335 | sk->sk_error_report(sk); |
| 336 | return err; |
| 337 | } |
| 338 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 339 | EXPORT_SYMBOL_GPL(dccp_disconnect); |
| 340 | |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 341 | /* |
| 342 | * Wait for a DCCP event. |
| 343 | * |
| 344 | * Note that we don't need to lock the socket, as the upper poll layers |
| 345 | * take care of normal races (between the test and the event) and we don't |
| 346 | * go look at any of the socket buffers directly. |
| 347 | */ |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 348 | unsigned int dccp_poll(struct file *file, struct socket *sock, |
| 349 | poll_table *wait) |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 350 | { |
| 351 | unsigned int mask; |
| 352 | struct sock *sk = sock->sk; |
| 353 | |
| 354 | poll_wait(file, sk->sk_sleep, wait); |
| 355 | if (sk->sk_state == DCCP_LISTEN) |
| 356 | return inet_csk_listen_poll(sk); |
| 357 | |
| 358 | /* Socket is not locked. We are protected from async events |
| 359 | by poll logic and correct handling of state changes |
| 360 | made by another threads is impossible in any case. |
| 361 | */ |
| 362 | |
| 363 | mask = 0; |
| 364 | if (sk->sk_err) |
| 365 | mask = POLLERR; |
| 366 | |
| 367 | if (sk->sk_shutdown == SHUTDOWN_MASK || sk->sk_state == DCCP_CLOSED) |
| 368 | mask |= POLLHUP; |
| 369 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
Davide Libenzi | f348d70 | 2006-03-25 03:07:39 -0800 | [diff] [blame] | 370 | mask |= POLLIN | POLLRDNORM | POLLRDHUP; |
Arnaldo Carvalho de Melo | 331968b | 2005-08-23 21:54:23 -0700 | [diff] [blame] | 371 | |
| 372 | /* Connected? */ |
| 373 | if ((1 << sk->sk_state) & ~(DCCPF_REQUESTING | DCCPF_RESPOND)) { |
| 374 | if (atomic_read(&sk->sk_rmem_alloc) > 0) |
| 375 | mask |= POLLIN | POLLRDNORM; |
| 376 | |
| 377 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) { |
| 378 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { |
| 379 | mask |= POLLOUT | POLLWRNORM; |
| 380 | } else { /* send SIGIO later */ |
| 381 | set_bit(SOCK_ASYNC_NOSPACE, |
| 382 | &sk->sk_socket->flags); |
| 383 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 384 | |
| 385 | /* Race breaker. If space is freed after |
| 386 | * wspace test but before the flags are set, |
| 387 | * IO signal will be lost. |
| 388 | */ |
| 389 | if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) |
| 390 | mask |= POLLOUT | POLLWRNORM; |
| 391 | } |
| 392 | } |
| 393 | } |
| 394 | return mask; |
| 395 | } |
| 396 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 397 | EXPORT_SYMBOL_GPL(dccp_poll); |
| 398 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 399 | int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 400 | { |
Arnaldo Carvalho de Melo | 6273172 | 2007-10-23 20:23:30 -0700 | [diff] [blame] | 401 | int rc = -ENOTCONN; |
| 402 | |
| 403 | lock_sock(sk); |
| 404 | |
| 405 | if (sk->sk_state == DCCP_LISTEN) |
| 406 | goto out; |
| 407 | |
| 408 | switch (cmd) { |
| 409 | case SIOCINQ: { |
| 410 | struct sk_buff *skb; |
| 411 | unsigned long amount = 0; |
| 412 | |
| 413 | skb = skb_peek(&sk->sk_receive_queue); |
| 414 | if (skb != NULL) { |
| 415 | /* |
| 416 | * We will only return the amount of this packet since |
| 417 | * that is all that will be read. |
| 418 | */ |
| 419 | amount = skb->len; |
| 420 | } |
| 421 | rc = put_user(amount, (int __user *)arg); |
| 422 | } |
| 423 | break; |
| 424 | default: |
| 425 | rc = -ENOIOCTLCMD; |
| 426 | break; |
| 427 | } |
| 428 | out: |
| 429 | release_sock(sk); |
| 430 | return rc; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 431 | } |
| 432 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 433 | EXPORT_SYMBOL_GPL(dccp_ioctl); |
| 434 | |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 435 | 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] | 436 | char __user *optval, int optlen) |
| 437 | { |
| 438 | struct dccp_sock *dp = dccp_sk(sk); |
| 439 | struct dccp_service_list *sl = NULL; |
| 440 | |
Arnaldo Carvalho de Melo | 8109b02 | 2006-12-10 16:01:18 -0200 | [diff] [blame] | 441 | if (service == DCCP_SERVICE_INVALID_VALUE || |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 442 | optlen > DCCP_SERVICE_LIST_MAX_LEN * sizeof(u32)) |
| 443 | return -EINVAL; |
| 444 | |
| 445 | if (optlen > sizeof(service)) { |
| 446 | sl = kmalloc(optlen, GFP_KERNEL); |
| 447 | if (sl == NULL) |
| 448 | return -ENOMEM; |
| 449 | |
| 450 | sl->dccpsl_nr = optlen / sizeof(u32) - 1; |
| 451 | if (copy_from_user(sl->dccpsl_list, |
| 452 | optval + sizeof(service), |
| 453 | optlen - sizeof(service)) || |
| 454 | dccp_list_has_service(sl, DCCP_SERVICE_INVALID_VALUE)) { |
| 455 | kfree(sl); |
| 456 | return -EFAULT; |
| 457 | } |
| 458 | } |
| 459 | |
| 460 | lock_sock(sk); |
| 461 | dp->dccps_service = service; |
| 462 | |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 463 | kfree(dp->dccps_service_list); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 464 | |
| 465 | dp->dccps_service_list = sl; |
| 466 | release_sock(sk); |
| 467 | return 0; |
| 468 | } |
| 469 | |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 470 | /* byte 1 is feature. the rest is the preference list */ |
| 471 | static int dccp_setsockopt_change(struct sock *sk, int type, |
| 472 | struct dccp_so_feat __user *optval) |
| 473 | { |
| 474 | struct dccp_so_feat opt; |
| 475 | u8 *val; |
| 476 | int rc; |
| 477 | |
| 478 | if (copy_from_user(&opt, optval, sizeof(opt))) |
| 479 | return -EFAULT; |
| 480 | |
| 481 | val = kmalloc(opt.dccpsf_len, GFP_KERNEL); |
| 482 | if (!val) |
| 483 | return -ENOMEM; |
| 484 | |
| 485 | if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) { |
| 486 | rc = -EFAULT; |
| 487 | goto out_free_val; |
| 488 | } |
| 489 | |
Arnaldo Carvalho de Melo | 8ca0d17 | 2006-03-20 22:51:53 -0800 | [diff] [blame] | 490 | rc = dccp_feat_change(dccp_msk(sk), type, opt.dccpsf_feat, |
| 491 | val, opt.dccpsf_len, GFP_KERNEL); |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 492 | if (rc) |
| 493 | goto out_free_val; |
| 494 | |
| 495 | out: |
| 496 | return rc; |
| 497 | |
| 498 | out_free_val: |
| 499 | kfree(val); |
| 500 | goto out; |
| 501 | } |
| 502 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 503 | static int do_dccp_setsockopt(struct sock *sk, int level, int optname, |
| 504 | char __user *optval, int optlen) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 505 | { |
Gerrit Renker | 09dbc38 | 2006-11-14 12:57:34 -0200 | [diff] [blame] | 506 | struct dccp_sock *dp = dccp_sk(sk); |
| 507 | int val, err = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 508 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 509 | if (optlen < sizeof(int)) |
| 510 | return -EINVAL; |
| 511 | |
| 512 | if (get_user(val, (int __user *)optval)) |
| 513 | return -EFAULT; |
| 514 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 515 | if (optname == DCCP_SOCKOPT_SERVICE) |
| 516 | return dccp_setsockopt_service(sk, val, optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 517 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 518 | lock_sock(sk); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 519 | switch (optname) { |
| 520 | case DCCP_SOCKOPT_PACKET_SIZE: |
Gerrit Renker | 5aed324 | 2006-11-28 19:33:36 -0200 | [diff] [blame] | 521 | 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] | 522 | err = 0; |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 523 | break; |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 524 | case DCCP_SOCKOPT_CHANGE_L: |
| 525 | if (optlen != sizeof(struct dccp_so_feat)) |
| 526 | err = -EINVAL; |
| 527 | else |
| 528 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L, |
YOSHIFUJI Hideaki | c9eaf17 | 2007-02-09 23:24:38 +0900 | [diff] [blame] | 529 | (struct dccp_so_feat __user *) |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 530 | optval); |
| 531 | break; |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 532 | case DCCP_SOCKOPT_CHANGE_R: |
| 533 | if (optlen != sizeof(struct dccp_so_feat)) |
| 534 | err = -EINVAL; |
| 535 | else |
| 536 | err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R, |
Alan Cox | 9faefb6 | 2006-07-10 14:24:23 -0700 | [diff] [blame] | 537 | (struct dccp_so_feat __user *) |
Andrea Bittau | afe0025 | 2006-03-20 17:43:56 -0800 | [diff] [blame] | 538 | optval); |
| 539 | break; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 540 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 541 | if (dp->dccps_role != DCCP_ROLE_SERVER) |
| 542 | err = -EOPNOTSUPP; |
| 543 | else |
| 544 | dp->dccps_server_timewait = (val != 0); |
| 545 | break; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 546 | case DCCP_SOCKOPT_SEND_CSCOV: /* sender side, RFC 4340, sec. 9.2 */ |
| 547 | if (val < 0 || val > 15) |
| 548 | err = -EINVAL; |
| 549 | else |
| 550 | dp->dccps_pcslen = val; |
| 551 | break; |
| 552 | case DCCP_SOCKOPT_RECV_CSCOV: /* receiver side, RFC 4340 sec. 9.2.1 */ |
| 553 | if (val < 0 || val > 15) |
| 554 | err = -EINVAL; |
| 555 | else { |
| 556 | dp->dccps_pcrlen = val; |
| 557 | /* FIXME: add feature negotiation, |
| 558 | * ChangeL(MinimumChecksumCoverage, val) */ |
| 559 | } |
| 560 | break; |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 561 | default: |
| 562 | err = -ENOPROTOOPT; |
| 563 | break; |
| 564 | } |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 565 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 566 | release_sock(sk); |
| 567 | return err; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 568 | } |
| 569 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 570 | int dccp_setsockopt(struct sock *sk, int level, int optname, |
| 571 | char __user *optval, int optlen) |
| 572 | { |
| 573 | if (level != SOL_DCCP) |
| 574 | return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level, |
| 575 | optname, optval, |
| 576 | optlen); |
| 577 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 578 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 579 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 580 | EXPORT_SYMBOL_GPL(dccp_setsockopt); |
| 581 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 582 | #ifdef CONFIG_COMPAT |
| 583 | 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] | 584 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 585 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 586 | if (level != SOL_DCCP) |
| 587 | return inet_csk_compat_setsockopt(sk, level, optname, |
| 588 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 589 | return do_dccp_setsockopt(sk, level, optname, optval, optlen); |
| 590 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 591 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 592 | EXPORT_SYMBOL_GPL(compat_dccp_setsockopt); |
| 593 | #endif |
| 594 | |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 595 | static int dccp_getsockopt_service(struct sock *sk, int len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 596 | __be32 __user *optval, |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 597 | int __user *optlen) |
| 598 | { |
| 599 | const struct dccp_sock *dp = dccp_sk(sk); |
| 600 | const struct dccp_service_list *sl; |
| 601 | int err = -ENOENT, slen = 0, total_len = sizeof(u32); |
| 602 | |
| 603 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 67e6b62 | 2005-09-16 16:58:40 -0700 | [diff] [blame] | 604 | if ((sl = dp->dccps_service_list) != NULL) { |
| 605 | slen = sl->dccpsl_nr * sizeof(u32); |
| 606 | total_len += slen; |
| 607 | } |
| 608 | |
| 609 | err = -EINVAL; |
| 610 | if (total_len > len) |
| 611 | goto out; |
| 612 | |
| 613 | err = 0; |
| 614 | if (put_user(total_len, optlen) || |
| 615 | put_user(dp->dccps_service, optval) || |
| 616 | (sl != NULL && copy_to_user(optval + 1, sl->dccpsl_list, slen))) |
| 617 | err = -EFAULT; |
| 618 | out: |
| 619 | release_sock(sk); |
| 620 | return err; |
| 621 | } |
| 622 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 623 | 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] | 624 | char __user *optval, int __user *optlen) |
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 | struct dccp_sock *dp; |
| 627 | int val, len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 628 | |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 629 | if (get_user(len, optlen)) |
| 630 | return -EFAULT; |
| 631 | |
Arnaldo Carvalho de Melo | 39ebc02 | 2007-03-28 11:54:32 -0700 | [diff] [blame] | 632 | if (len < (int)sizeof(int)) |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 633 | return -EINVAL; |
| 634 | |
| 635 | dp = dccp_sk(sk); |
| 636 | |
| 637 | switch (optname) { |
| 638 | case DCCP_SOCKOPT_PACKET_SIZE: |
Gerrit Renker | 5aed324 | 2006-11-28 19:33:36 -0200 | [diff] [blame] | 639 | 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] | 640 | return 0; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 641 | case DCCP_SOCKOPT_SERVICE: |
| 642 | return dccp_getsockopt_service(sk, len, |
Andrea Bittau | 60fe62e | 2006-03-20 19:23:32 -0800 | [diff] [blame] | 643 | (__be32 __user *)optval, optlen); |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 644 | case DCCP_SOCKOPT_GET_CUR_MPS: |
| 645 | val = dp->dccps_mss_cache; |
Gerrit Renker | 7c559a9 | 2007-10-04 14:39:22 -0700 | [diff] [blame] | 646 | break; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 647 | case DCCP_SOCKOPT_SERVER_TIMEWAIT: |
| 648 | val = dp->dccps_server_timewait; |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 649 | break; |
Gerrit Renker | 6f4e5ff | 2006-11-10 17:43:06 -0200 | [diff] [blame] | 650 | case DCCP_SOCKOPT_SEND_CSCOV: |
| 651 | val = dp->dccps_pcslen; |
| 652 | break; |
| 653 | case DCCP_SOCKOPT_RECV_CSCOV: |
| 654 | val = dp->dccps_pcrlen; |
| 655 | break; |
Arnaldo Carvalho de Melo | 88f964d | 2005-09-18 00:19:32 -0700 | [diff] [blame] | 656 | case 128 ... 191: |
| 657 | return ccid_hc_rx_getsockopt(dp->dccps_hc_rx_ccid, sk, optname, |
| 658 | len, (u32 __user *)optval, optlen); |
| 659 | case 192 ... 255: |
| 660 | return ccid_hc_tx_getsockopt(dp->dccps_hc_tx_ccid, sk, optname, |
| 661 | len, (u32 __user *)optval, optlen); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 662 | default: |
| 663 | return -ENOPROTOOPT; |
| 664 | } |
| 665 | |
Gerrit Renker | 7913350 | 2007-12-13 12:27:14 -0200 | [diff] [blame] | 666 | len = sizeof(val); |
Arnaldo Carvalho de Melo | a84ffe4 | 2005-08-28 04:51:32 -0300 | [diff] [blame] | 667 | if (put_user(len, optlen) || copy_to_user(optval, &val, len)) |
| 668 | return -EFAULT; |
| 669 | |
| 670 | return 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 671 | } |
| 672 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 673 | int dccp_getsockopt(struct sock *sk, int level, int optname, |
| 674 | char __user *optval, int __user *optlen) |
| 675 | { |
| 676 | if (level != SOL_DCCP) |
| 677 | return inet_csk(sk)->icsk_af_ops->getsockopt(sk, level, |
| 678 | optname, optval, |
| 679 | optlen); |
| 680 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 681 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 682 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 683 | EXPORT_SYMBOL_GPL(dccp_getsockopt); |
| 684 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 685 | #ifdef CONFIG_COMPAT |
| 686 | 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] | 687 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 688 | { |
Arnaldo Carvalho de Melo | dec73ff | 2006-03-20 22:46:16 -0800 | [diff] [blame] | 689 | if (level != SOL_DCCP) |
| 690 | return inet_csk_compat_getsockopt(sk, level, optname, |
| 691 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 692 | return do_dccp_getsockopt(sk, level, optname, optval, optlen); |
| 693 | } |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 694 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 695 | EXPORT_SYMBOL_GPL(compat_dccp_getsockopt); |
| 696 | #endif |
| 697 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 698 | int dccp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 699 | size_t len) |
| 700 | { |
| 701 | const struct dccp_sock *dp = dccp_sk(sk); |
| 702 | const int flags = msg->msg_flags; |
| 703 | const int noblock = flags & MSG_DONTWAIT; |
| 704 | struct sk_buff *skb; |
| 705 | int rc, size; |
| 706 | long timeo; |
| 707 | |
| 708 | if (len > dp->dccps_mss_cache) |
| 709 | return -EMSGSIZE; |
| 710 | |
| 711 | lock_sock(sk); |
Ian McDonald | b1308dc | 2006-11-20 18:30:17 -0200 | [diff] [blame] | 712 | |
| 713 | if (sysctl_dccp_tx_qlen && |
| 714 | (sk->sk_write_queue.qlen >= sysctl_dccp_tx_qlen)) { |
| 715 | rc = -EAGAIN; |
| 716 | goto out_release; |
| 717 | } |
| 718 | |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 719 | timeo = sock_sndtimeo(sk, noblock); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 720 | |
| 721 | /* |
| 722 | * We have to use sk_stream_wait_connect here to set sk_write_pending, |
| 723 | * so that the trick in dccp_rcv_request_sent_state_process. |
| 724 | */ |
| 725 | /* Wait for a connection to finish. */ |
Gerrit Renker | cecd8d0 | 2007-09-26 19:36:08 -0300 | [diff] [blame] | 726 | if ((1 << sk->sk_state) & ~(DCCPF_OPEN | DCCPF_PARTOPEN)) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 727 | if ((rc = sk_stream_wait_connect(sk, &timeo)) != 0) |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 728 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 729 | |
| 730 | size = sk->sk_prot->max_header + len; |
| 731 | release_sock(sk); |
| 732 | skb = sock_alloc_send_skb(sk, size, noblock, &rc); |
| 733 | lock_sock(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 734 | if (skb == NULL) |
| 735 | goto out_release; |
| 736 | |
| 737 | skb_reserve(skb, sk->sk_prot->max_header); |
| 738 | 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] | 739 | if (rc != 0) |
| 740 | goto out_discard; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 741 | |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 742 | skb_queue_tail(&sk->sk_write_queue, skb); |
| 743 | dccp_write_xmit(sk,0); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 744 | out_release: |
| 745 | release_sock(sk); |
| 746 | return rc ? : len; |
Arnaldo Carvalho de Melo | 27258ee | 2005-08-09 20:30:56 -0700 | [diff] [blame] | 747 | out_discard: |
| 748 | kfree_skb(skb); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 749 | goto out_release; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 750 | } |
| 751 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 752 | EXPORT_SYMBOL_GPL(dccp_sendmsg); |
| 753 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 754 | int dccp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, |
| 755 | size_t len, int nonblock, int flags, int *addr_len) |
| 756 | { |
| 757 | const struct dccp_hdr *dh; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 758 | long timeo; |
| 759 | |
| 760 | lock_sock(sk); |
| 761 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 762 | if (sk->sk_state == DCCP_LISTEN) { |
| 763 | len = -ENOTCONN; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 764 | goto out; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 765 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 766 | |
| 767 | timeo = sock_rcvtimeo(sk, nonblock); |
| 768 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 769 | do { |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 770 | struct sk_buff *skb = skb_peek(&sk->sk_receive_queue); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 771 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 772 | if (skb == NULL) |
| 773 | goto verify_sock_status; |
| 774 | |
| 775 | dh = dccp_hdr(skb); |
| 776 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 777 | switch (dh->dccph_type) { |
| 778 | case DCCP_PKT_DATA: |
| 779 | case DCCP_PKT_DATAACK: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 780 | goto found_ok_skb; |
| 781 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 782 | case DCCP_PKT_CLOSE: |
| 783 | case DCCP_PKT_CLOSEREQ: |
| 784 | if (!(flags & MSG_PEEK)) |
| 785 | dccp_finish_passive_close(sk); |
| 786 | /* fall through */ |
| 787 | case DCCP_PKT_RESET: |
| 788 | dccp_pr_debug("found fin (%s) ok!\n", |
| 789 | dccp_packet_name(dh->dccph_type)); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 790 | len = 0; |
| 791 | goto found_fin_ok; |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 792 | default: |
| 793 | dccp_pr_debug("packet_type=%s\n", |
| 794 | dccp_packet_name(dh->dccph_type)); |
| 795 | sk_eat_skb(sk, skb, 0); |
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 | verify_sock_status: |
| 798 | if (sock_flag(sk, SOCK_DONE)) { |
| 799 | len = 0; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 800 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 801 | } |
| 802 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 803 | if (sk->sk_err) { |
| 804 | len = sock_error(sk); |
| 805 | break; |
| 806 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 807 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 808 | if (sk->sk_shutdown & RCV_SHUTDOWN) { |
| 809 | len = 0; |
| 810 | break; |
| 811 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 812 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 813 | if (sk->sk_state == DCCP_CLOSED) { |
| 814 | if (!sock_flag(sk, SOCK_DONE)) { |
| 815 | /* This occurs when user tries to read |
| 816 | * from never connected socket. |
| 817 | */ |
| 818 | len = -ENOTCONN; |
| 819 | break; |
| 820 | } |
| 821 | len = 0; |
| 822 | break; |
| 823 | } |
| 824 | |
| 825 | if (!timeo) { |
| 826 | len = -EAGAIN; |
| 827 | break; |
| 828 | } |
| 829 | |
| 830 | if (signal_pending(current)) { |
| 831 | len = sock_intr_errno(timeo); |
| 832 | break; |
| 833 | } |
| 834 | |
| 835 | sk_wait_data(sk, &timeo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 836 | continue; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 837 | found_ok_skb: |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 838 | if (len > skb->len) |
| 839 | len = skb->len; |
| 840 | else if (len < skb->len) |
| 841 | msg->msg_flags |= MSG_TRUNC; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 842 | |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 843 | if (skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len)) { |
| 844 | /* Exception. Bailout! */ |
| 845 | len = -EFAULT; |
| 846 | break; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 847 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 848 | found_fin_ok: |
| 849 | if (!(flags & MSG_PEEK)) |
Chris Leech | 624d116 | 2006-05-23 18:01:28 -0700 | [diff] [blame] | 850 | sk_eat_skb(sk, skb, 0); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 851 | break; |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 852 | } while (1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 853 | out: |
| 854 | release_sock(sk); |
Arnaldo Carvalho de Melo | 531669a | 2005-08-13 20:35:17 -0300 | [diff] [blame] | 855 | return len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 856 | } |
| 857 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 858 | EXPORT_SYMBOL_GPL(dccp_recvmsg); |
| 859 | |
| 860 | int inet_dccp_listen(struct socket *sock, int backlog) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 861 | { |
| 862 | struct sock *sk = sock->sk; |
| 863 | unsigned char old_state; |
| 864 | int err; |
| 865 | |
| 866 | lock_sock(sk); |
| 867 | |
| 868 | err = -EINVAL; |
| 869 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_DCCP) |
| 870 | goto out; |
| 871 | |
| 872 | old_state = sk->sk_state; |
| 873 | if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) |
| 874 | goto out; |
| 875 | |
| 876 | /* Really, if the socket is already in listen state |
| 877 | * we can only allow the backlog to be adjusted. |
| 878 | */ |
| 879 | if (old_state != DCCP_LISTEN) { |
| 880 | /* |
| 881 | * FIXME: here it probably should be sk->sk_prot->listen_start |
| 882 | * see tcp_listen_start |
| 883 | */ |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 884 | err = dccp_listen_start(sk, backlog); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 885 | if (err) |
| 886 | goto out; |
| 887 | } |
| 888 | sk->sk_max_ack_backlog = backlog; |
| 889 | err = 0; |
| 890 | |
| 891 | out: |
| 892 | release_sock(sk); |
| 893 | return err; |
| 894 | } |
| 895 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 896 | EXPORT_SYMBOL_GPL(inet_dccp_listen); |
| 897 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 898 | static void dccp_terminate_connection(struct sock *sk) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 899 | { |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 900 | u8 next_state = DCCP_CLOSED; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 901 | |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 902 | switch (sk->sk_state) { |
| 903 | case DCCP_PASSIVE_CLOSE: |
| 904 | case DCCP_PASSIVE_CLOSEREQ: |
| 905 | dccp_finish_passive_close(sk); |
| 906 | break; |
| 907 | case DCCP_PARTOPEN: |
| 908 | dccp_pr_debug("Stop PARTOPEN timer (%p)\n", sk); |
| 909 | inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK); |
| 910 | /* fall through */ |
| 911 | case DCCP_OPEN: |
| 912 | dccp_send_close(sk, 1); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 913 | |
Gerrit Renker | b8599d2 | 2007-12-13 12:25:01 -0200 | [diff] [blame] | 914 | if (dccp_sk(sk)->dccps_role == DCCP_ROLE_SERVER && |
| 915 | !dccp_sk(sk)->dccps_server_timewait) |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 916 | next_state = DCCP_ACTIVE_CLOSEREQ; |
| 917 | else |
| 918 | next_state = DCCP_CLOSING; |
| 919 | /* fall through */ |
| 920 | default: |
| 921 | dccp_set_state(sk, next_state); |
| 922 | } |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | void dccp_close(struct sock *sk, long timeout) |
| 926 | { |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 927 | struct dccp_sock *dp = dccp_sk(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 928 | struct sk_buff *skb; |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 929 | u32 data_was_unread = 0; |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 930 | int state; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 931 | |
| 932 | lock_sock(sk); |
| 933 | |
| 934 | sk->sk_shutdown = SHUTDOWN_MASK; |
| 935 | |
| 936 | if (sk->sk_state == DCCP_LISTEN) { |
| 937 | dccp_set_state(sk, DCCP_CLOSED); |
| 938 | |
| 939 | /* Special case. */ |
| 940 | inet_csk_listen_stop(sk); |
| 941 | |
| 942 | goto adjudge_to_death; |
| 943 | } |
| 944 | |
Ian McDonald | 97e5848 | 2006-08-26 19:16:45 -0700 | [diff] [blame] | 945 | sk_stop_timer(sk, &dp->dccps_xmit_timer); |
| 946 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 947 | /* |
| 948 | * We need to flush the recv. buffs. We do this only on the |
| 949 | * descriptor close, not protocol-sourced closes, because the |
| 950 | *reader process may not have drained the data yet! |
| 951 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 952 | while ((skb = __skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 953 | data_was_unread += skb->len; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 954 | __kfree_skb(skb); |
| 955 | } |
| 956 | |
Gerrit Renker | d83bd95 | 2007-12-16 16:06:03 -0800 | [diff] [blame] | 957 | if (data_was_unread) { |
| 958 | /* Unread data was tossed, send an appropriate Reset Code */ |
| 959 | DCCP_WARN("DCCP: ABORT -- %u bytes unread\n", data_was_unread); |
| 960 | dccp_send_reset(sk, DCCP_RESET_CODE_ABORTED); |
| 961 | dccp_set_state(sk, DCCP_CLOSED); |
| 962 | } else if (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime) { |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 963 | /* Check zero linger _after_ checking for unread data. */ |
| 964 | sk->sk_prot->disconnect(sk, 0); |
Gerrit Renker | 0c86962 | 2007-11-28 11:59:48 -0200 | [diff] [blame] | 965 | } else if (sk->sk_state != DCCP_CLOSED) { |
| 966 | dccp_terminate_connection(sk); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 967 | } |
| 968 | |
| 969 | sk_stream_wait_close(sk, timeout); |
| 970 | |
| 971 | adjudge_to_death: |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 972 | state = sk->sk_state; |
| 973 | sock_hold(sk); |
| 974 | sock_orphan(sk); |
| 975 | atomic_inc(sk->sk_prot->orphan_count); |
| 976 | |
Arnaldo Carvalho de Melo | 7ad07e7 | 2005-08-23 21:50:06 -0700 | [diff] [blame] | 977 | /* |
| 978 | * It is the last release_sock in its life. It will remove backlog. |
| 979 | */ |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 980 | release_sock(sk); |
| 981 | /* |
| 982 | * Now socket is owned by kernel and we acquire BH lock |
| 983 | * to finish close. No need to check for user refs. |
| 984 | */ |
| 985 | local_bh_disable(); |
| 986 | bh_lock_sock(sk); |
| 987 | BUG_TRAP(!sock_owned_by_user(sk)); |
| 988 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 989 | /* Have we already been destroyed by a softirq or backlog? */ |
| 990 | if (state != DCCP_CLOSED && sk->sk_state == DCCP_CLOSED) |
| 991 | goto out; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 992 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 993 | if (sk->sk_state == DCCP_CLOSED) |
| 994 | inet_csk_destroy_sock(sk); |
| 995 | |
| 996 | /* Otherwise, socket is reprieved until protocol close. */ |
| 997 | |
Herbert Xu | 134af34 | 2006-05-05 17:09:13 -0700 | [diff] [blame] | 998 | out: |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 999 | bh_unlock_sock(sk); |
| 1000 | local_bh_enable(); |
| 1001 | sock_put(sk); |
| 1002 | } |
| 1003 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1004 | EXPORT_SYMBOL_GPL(dccp_close); |
| 1005 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1006 | void dccp_shutdown(struct sock *sk, int how) |
| 1007 | { |
Gerrit Renker | 8e8c71f | 2007-11-21 09:56:48 -0200 | [diff] [blame] | 1008 | dccp_pr_debug("called shutdown(%x)\n", how); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1009 | } |
| 1010 | |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1011 | EXPORT_SYMBOL_GPL(dccp_shutdown); |
| 1012 | |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1013 | static int __init dccp_mib_init(void) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1014 | { |
| 1015 | int rc = -ENOMEM; |
| 1016 | |
| 1017 | dccp_statistics[0] = alloc_percpu(struct dccp_mib); |
| 1018 | if (dccp_statistics[0] == NULL) |
| 1019 | goto out; |
| 1020 | |
| 1021 | dccp_statistics[1] = alloc_percpu(struct dccp_mib); |
| 1022 | if (dccp_statistics[1] == NULL) |
| 1023 | goto out_free_one; |
| 1024 | |
| 1025 | rc = 0; |
| 1026 | out: |
| 1027 | return rc; |
| 1028 | out_free_one: |
| 1029 | free_percpu(dccp_statistics[0]); |
| 1030 | dccp_statistics[0] = NULL; |
| 1031 | goto out; |
| 1032 | |
| 1033 | } |
| 1034 | |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1035 | static void dccp_mib_exit(void) |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1036 | { |
| 1037 | free_percpu(dccp_statistics[0]); |
| 1038 | free_percpu(dccp_statistics[1]); |
| 1039 | dccp_statistics[0] = dccp_statistics[1] = NULL; |
| 1040 | } |
| 1041 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1042 | static int thash_entries; |
| 1043 | module_param(thash_entries, int, 0444); |
| 1044 | MODULE_PARM_DESC(thash_entries, "Number of ehash buckets"); |
| 1045 | |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1046 | #ifdef CONFIG_IP_DCCP_DEBUG |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1047 | int dccp_debug; |
Gerrit Renker | 042d18f | 2007-10-04 14:39:53 -0700 | [diff] [blame] | 1048 | module_param(dccp_debug, bool, 0444); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1049 | MODULE_PARM_DESC(dccp_debug, "Enable debug messages"); |
Arnaldo Carvalho de Melo | f21e68c | 2005-12-13 23:24:16 -0800 | [diff] [blame] | 1050 | |
| 1051 | EXPORT_SYMBOL_GPL(dccp_debug); |
Arnaldo Carvalho de Melo | a1d3a35 | 2005-08-13 22:42:25 -0300 | [diff] [blame] | 1052 | #endif |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1053 | |
| 1054 | static int __init dccp_init(void) |
| 1055 | { |
| 1056 | unsigned long goal; |
| 1057 | int ehash_order, bhash_order, i; |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1058 | int rc = -ENOBUFS; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1059 | |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1060 | dccp_hashinfo.bind_bucket_cachep = |
| 1061 | kmem_cache_create("dccp_bind_bucket", |
| 1062 | sizeof(struct inet_bind_bucket), 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1063 | SLAB_HWCACHE_ALIGN, NULL); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1064 | if (!dccp_hashinfo.bind_bucket_cachep) |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1065 | goto out; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1066 | |
| 1067 | /* |
| 1068 | * Size and allocate the main established and bind bucket |
| 1069 | * hash tables. |
| 1070 | * |
| 1071 | * The methodology is similar to that of the buffer cache. |
| 1072 | */ |
| 1073 | if (num_physpages >= (128 * 1024)) |
| 1074 | goal = num_physpages >> (21 - PAGE_SHIFT); |
| 1075 | else |
| 1076 | goal = num_physpages >> (23 - PAGE_SHIFT); |
| 1077 | |
| 1078 | if (thash_entries) |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1079 | goal = (thash_entries * |
| 1080 | sizeof(struct inet_ehash_bucket)) >> PAGE_SHIFT; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1081 | for (ehash_order = 0; (1UL << ehash_order) < goal; ehash_order++) |
| 1082 | ; |
| 1083 | do { |
| 1084 | dccp_hashinfo.ehash_size = (1UL << ehash_order) * PAGE_SIZE / |
| 1085 | sizeof(struct inet_ehash_bucket); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1086 | while (dccp_hashinfo.ehash_size & |
| 1087 | (dccp_hashinfo.ehash_size - 1)) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1088 | dccp_hashinfo.ehash_size--; |
| 1089 | dccp_hashinfo.ehash = (struct inet_ehash_bucket *) |
| 1090 | __get_free_pages(GFP_ATOMIC, ehash_order); |
| 1091 | } while (!dccp_hashinfo.ehash && --ehash_order > 0); |
| 1092 | |
| 1093 | if (!dccp_hashinfo.ehash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1094 | DCCP_CRIT("Failed to allocate DCCP established hash table"); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1095 | goto out_free_bind_bucket_cachep; |
| 1096 | } |
| 1097 | |
Eric Dumazet | dbca9b275 | 2007-02-08 14:16:46 -0800 | [diff] [blame] | 1098 | for (i = 0; i < dccp_hashinfo.ehash_size; i++) { |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1099 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].chain); |
Eric Dumazet | dbca9b275 | 2007-02-08 14:16:46 -0800 | [diff] [blame] | 1100 | INIT_HLIST_HEAD(&dccp_hashinfo.ehash[i].twchain); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1101 | } |
| 1102 | |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1103 | if (inet_ehash_locks_alloc(&dccp_hashinfo)) |
| 1104 | goto out_free_dccp_ehash; |
| 1105 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1106 | bhash_order = ehash_order; |
| 1107 | |
| 1108 | do { |
| 1109 | dccp_hashinfo.bhash_size = (1UL << bhash_order) * PAGE_SIZE / |
| 1110 | sizeof(struct inet_bind_hashbucket); |
Arnaldo Carvalho de Melo | 7690af3 | 2005-08-13 20:34:54 -0300 | [diff] [blame] | 1111 | if ((dccp_hashinfo.bhash_size > (64 * 1024)) && |
| 1112 | bhash_order > 0) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1113 | continue; |
| 1114 | dccp_hashinfo.bhash = (struct inet_bind_hashbucket *) |
| 1115 | __get_free_pages(GFP_ATOMIC, bhash_order); |
| 1116 | } while (!dccp_hashinfo.bhash && --bhash_order >= 0); |
| 1117 | |
| 1118 | if (!dccp_hashinfo.bhash) { |
Gerrit Renker | 59348b1 | 2006-11-20 18:39:23 -0200 | [diff] [blame] | 1119 | DCCP_CRIT("Failed to allocate DCCP bind hash table"); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1120 | goto out_free_dccp_locks; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1121 | } |
| 1122 | |
| 1123 | for (i = 0; i < dccp_hashinfo.bhash_size; i++) { |
| 1124 | spin_lock_init(&dccp_hashinfo.bhash[i].lock); |
| 1125 | INIT_HLIST_HEAD(&dccp_hashinfo.bhash[i].chain); |
| 1126 | } |
| 1127 | |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1128 | rc = dccp_mib_init(); |
Arnaldo Carvalho de Melo | fa23e2e | 2006-03-20 17:16:01 -0800 | [diff] [blame] | 1129 | if (rc) |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1130 | goto out_free_dccp_bhash; |
| 1131 | |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1132 | rc = dccp_ackvec_init(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1133 | if (rc) |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1134 | goto out_free_dccp_mib; |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1135 | |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1136 | rc = dccp_sysctl_init(); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1137 | if (rc) |
| 1138 | goto out_ackvec_exit; |
Gerrit Renker | 4c70f38 | 2007-09-25 22:40:13 -0700 | [diff] [blame] | 1139 | |
| 1140 | dccp_timestamping_init(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1141 | out: |
| 1142 | return rc; |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1143 | out_ackvec_exit: |
| 1144 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | b61fafc | 2006-03-20 21:25:11 -0800 | [diff] [blame] | 1145 | out_free_dccp_mib: |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1146 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1147 | out_free_dccp_bhash: |
| 1148 | free_pages((unsigned long)dccp_hashinfo.bhash, bhash_order); |
| 1149 | dccp_hashinfo.bhash = NULL; |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1150 | out_free_dccp_locks: |
| 1151 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1152 | out_free_dccp_ehash: |
| 1153 | free_pages((unsigned long)dccp_hashinfo.ehash, ehash_order); |
| 1154 | dccp_hashinfo.ehash = NULL; |
| 1155 | out_free_bind_bucket_cachep: |
| 1156 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
| 1157 | dccp_hashinfo.bind_bucket_cachep = NULL; |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1158 | goto out; |
| 1159 | } |
| 1160 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1161 | static void __exit dccp_fini(void) |
| 1162 | { |
Arnaldo Carvalho de Melo | 46f09ff | 2006-03-20 21:24:42 -0800 | [diff] [blame] | 1163 | dccp_mib_exit(); |
Arnaldo Carvalho de Melo | 725ba8e | 2005-08-13 20:35:39 -0300 | [diff] [blame] | 1164 | free_pages((unsigned long)dccp_hashinfo.bhash, |
| 1165 | get_order(dccp_hashinfo.bhash_size * |
| 1166 | sizeof(struct inet_bind_hashbucket))); |
| 1167 | free_pages((unsigned long)dccp_hashinfo.ehash, |
| 1168 | get_order(dccp_hashinfo.ehash_size * |
| 1169 | sizeof(struct inet_ehash_bucket))); |
Eric Dumazet | 230140c | 2007-11-07 02:40:20 -0800 | [diff] [blame] | 1170 | inet_ehash_locks_free(&dccp_hashinfo); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1171 | kmem_cache_destroy(dccp_hashinfo.bind_bucket_cachep); |
Arnaldo Carvalho de Melo | 9b07ef5 | 2006-03-20 17:16:17 -0800 | [diff] [blame] | 1172 | dccp_ackvec_exit(); |
Arnaldo Carvalho de Melo | e55d912 | 2006-03-20 19:25:02 -0800 | [diff] [blame] | 1173 | dccp_sysctl_exit(); |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1174 | } |
| 1175 | |
| 1176 | module_init(dccp_init); |
| 1177 | module_exit(dccp_fini); |
| 1178 | |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 1179 | MODULE_LICENSE("GPL"); |
| 1180 | MODULE_AUTHOR("Arnaldo Carvalho de Melo <acme@conectiva.com.br>"); |
| 1181 | MODULE_DESCRIPTION("DCCP - Datagram Congestion Controlled Protocol"); |