ia64/linux-2.6.18-xen.hg

view net/dccp/dccp.h @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 #ifndef _DCCP_H
2 #define _DCCP_H
3 /*
4 * net/dccp/dccp.h
5 *
6 * An implementation of the DCCP protocol
7 * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
8 * Copyright (c) 2005-6 Ian McDonald <ian.mcdonald@jandi.co.nz>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
15 #include <linux/dccp.h>
16 #include <net/snmp.h>
17 #include <net/sock.h>
18 #include <net/tcp.h>
19 #include "ackvec.h"
21 #ifdef CONFIG_IP_DCCP_DEBUG
22 extern int dccp_debug;
24 #define dccp_pr_debug(format, a...) \
25 do { if (dccp_debug) \
26 printk(KERN_DEBUG "%s: " format, __FUNCTION__ , ##a); \
27 } while (0)
28 #define dccp_pr_debug_cat(format, a...) do { if (dccp_debug) \
29 printk(format, ##a); } while (0)
30 #else
31 #define dccp_pr_debug(format, a...)
32 #define dccp_pr_debug_cat(format, a...)
33 #endif
35 extern struct inet_hashinfo dccp_hashinfo;
37 extern atomic_t dccp_orphan_count;
38 extern int dccp_tw_count;
39 extern void dccp_tw_deschedule(struct inet_timewait_sock *tw);
41 extern void dccp_time_wait(struct sock *sk, int state, int timeo);
43 /* FIXME: Right size this */
44 #define DCCP_MAX_OPT_LEN 128
46 #define DCCP_MAX_PACKET_HDR 32
48 #define MAX_DCCP_HEADER (DCCP_MAX_PACKET_HDR + DCCP_MAX_OPT_LEN + MAX_HEADER)
50 #define DCCP_TIMEWAIT_LEN (60 * HZ) /* how long to wait to destroy TIME-WAIT
51 * state, about 60 seconds */
53 /* draft-ietf-dccp-spec-11.txt initial RTO value */
54 #define DCCP_TIMEOUT_INIT ((unsigned)(3 * HZ))
56 /* Maximal interval between probes for local resources. */
57 #define DCCP_RESOURCE_PROBE_INTERVAL ((unsigned)(HZ / 2U))
59 #define DCCP_RTO_MAX ((unsigned)(120 * HZ)) /* FIXME: using TCP value */
61 /* is seq1 < seq2 ? */
62 static inline int before48(const u64 seq1, const u64 seq2)
63 {
64 return (s64)((seq1 << 16) - (seq2 << 16)) < 0;
65 }
67 /* is seq1 > seq2 ? */
68 static inline int after48(const u64 seq1, const u64 seq2)
69 {
70 return (s64)((seq2 << 16) - (seq1 << 16)) < 0;
71 }
73 /* is seq2 <= seq1 <= seq3 ? */
74 static inline int between48(const u64 seq1, const u64 seq2, const u64 seq3)
75 {
76 return (seq3 << 16) - (seq2 << 16) >= (seq1 << 16) - (seq2 << 16);
77 }
79 static inline u64 max48(const u64 seq1, const u64 seq2)
80 {
81 return after48(seq1, seq2) ? seq1 : seq2;
82 }
84 /* is seq1 next seqno after seq2 */
85 static inline int follows48(const u64 seq1, const u64 seq2)
86 {
87 int diff = (seq1 & 0xFFFF) - (seq2 & 0xFFFF);
89 return diff==1;
90 }
92 enum {
93 DCCP_MIB_NUM = 0,
94 DCCP_MIB_ACTIVEOPENS, /* ActiveOpens */
95 DCCP_MIB_ESTABRESETS, /* EstabResets */
96 DCCP_MIB_CURRESTAB, /* CurrEstab */
97 DCCP_MIB_OUTSEGS, /* OutSegs */
98 DCCP_MIB_OUTRSTS,
99 DCCP_MIB_ABORTONTIMEOUT,
100 DCCP_MIB_TIMEOUTS,
101 DCCP_MIB_ABORTFAILED,
102 DCCP_MIB_PASSIVEOPENS,
103 DCCP_MIB_ATTEMPTFAILS,
104 DCCP_MIB_OUTDATAGRAMS,
105 DCCP_MIB_INERRS,
106 DCCP_MIB_OPTMANDATORYERROR,
107 DCCP_MIB_INVALIDOPT,
108 __DCCP_MIB_MAX
109 };
111 #define DCCP_MIB_MAX __DCCP_MIB_MAX
112 struct dccp_mib {
113 unsigned long mibs[DCCP_MIB_MAX];
114 } __SNMP_MIB_ALIGN__;
116 DECLARE_SNMP_STAT(struct dccp_mib, dccp_statistics);
117 #define DCCP_INC_STATS(field) SNMP_INC_STATS(dccp_statistics, field)
118 #define DCCP_INC_STATS_BH(field) SNMP_INC_STATS_BH(dccp_statistics, field)
119 #define DCCP_INC_STATS_USER(field) SNMP_INC_STATS_USER(dccp_statistics, field)
120 #define DCCP_DEC_STATS(field) SNMP_DEC_STATS(dccp_statistics, field)
121 #define DCCP_ADD_STATS_BH(field, val) \
122 SNMP_ADD_STATS_BH(dccp_statistics, field, val)
123 #define DCCP_ADD_STATS_USER(field, val) \
124 SNMP_ADD_STATS_USER(dccp_statistics, field, val)
126 extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
128 extern void dccp_send_ack(struct sock *sk);
129 extern void dccp_send_delayed_ack(struct sock *sk);
130 extern void dccp_send_sync(struct sock *sk, const u64 seq,
131 const enum dccp_pkt_type pkt_type);
133 extern int dccp_write_xmit(struct sock *sk, struct sk_buff *skb, long *timeo);
134 extern void dccp_write_space(struct sock *sk);
136 extern void dccp_init_xmit_timers(struct sock *sk);
137 static inline void dccp_clear_xmit_timers(struct sock *sk)
138 {
139 inet_csk_clear_xmit_timers(sk);
140 }
142 extern unsigned int dccp_sync_mss(struct sock *sk, u32 pmtu);
144 extern const char *dccp_packet_name(const int type);
145 extern const char *dccp_state_name(const int state);
147 extern void dccp_set_state(struct sock *sk, const int state);
148 extern void dccp_done(struct sock *sk);
150 static inline void dccp_openreq_init(struct request_sock *req,
151 struct dccp_sock *dp,
152 struct sk_buff *skb)
153 {
154 /*
155 * FIXME: fill in the other req fields from the DCCP options
156 * received
157 */
158 inet_rsk(req)->rmt_port = dccp_hdr(skb)->dccph_sport;
159 inet_rsk(req)->acked = 0;
160 req->rcv_wnd = 0;
161 }
163 extern int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb);
165 extern struct sock *dccp_create_openreq_child(struct sock *sk,
166 const struct request_sock *req,
167 const struct sk_buff *skb);
169 extern int dccp_v4_do_rcv(struct sock *sk, struct sk_buff *skb);
171 extern struct sock *dccp_v4_request_recv_sock(struct sock *sk,
172 struct sk_buff *skb,
173 struct request_sock *req,
174 struct dst_entry *dst);
175 extern struct sock *dccp_check_req(struct sock *sk, struct sk_buff *skb,
176 struct request_sock *req,
177 struct request_sock **prev);
179 extern int dccp_child_process(struct sock *parent, struct sock *child,
180 struct sk_buff *skb);
181 extern int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
182 struct dccp_hdr *dh, unsigned len);
183 extern int dccp_rcv_established(struct sock *sk, struct sk_buff *skb,
184 const struct dccp_hdr *dh, const unsigned len);
186 extern int dccp_init_sock(struct sock *sk, const __u8 ctl_sock_initialized);
187 extern int dccp_destroy_sock(struct sock *sk);
189 extern void dccp_close(struct sock *sk, long timeout);
190 extern struct sk_buff *dccp_make_response(struct sock *sk,
191 struct dst_entry *dst,
192 struct request_sock *req);
194 extern int dccp_connect(struct sock *sk);
195 extern int dccp_disconnect(struct sock *sk, int flags);
196 extern void dccp_hash(struct sock *sk);
197 extern void dccp_unhash(struct sock *sk);
198 extern int dccp_getsockopt(struct sock *sk, int level, int optname,
199 char __user *optval, int __user *optlen);
200 extern int dccp_setsockopt(struct sock *sk, int level, int optname,
201 char __user *optval, int optlen);
202 #ifdef CONFIG_COMPAT
203 extern int compat_dccp_getsockopt(struct sock *sk,
204 int level, int optname,
205 char __user *optval, int __user *optlen);
206 extern int compat_dccp_setsockopt(struct sock *sk,
207 int level, int optname,
208 char __user *optval, int optlen);
209 #endif
210 extern int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
211 extern int dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
212 struct msghdr *msg, size_t size);
213 extern int dccp_recvmsg(struct kiocb *iocb, struct sock *sk,
214 struct msghdr *msg, size_t len, int nonblock,
215 int flags, int *addr_len);
216 extern void dccp_shutdown(struct sock *sk, int how);
217 extern int inet_dccp_listen(struct socket *sock, int backlog);
218 extern unsigned int dccp_poll(struct file *file, struct socket *sock,
219 poll_table *wait);
220 extern void dccp_v4_send_check(struct sock *sk, int len,
221 struct sk_buff *skb);
222 extern int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr,
223 int addr_len);
225 extern int dccp_v4_checksum(const struct sk_buff *skb,
226 const __be32 saddr, const __be32 daddr);
228 extern int dccp_send_reset(struct sock *sk, enum dccp_reset_codes code);
229 extern void dccp_send_close(struct sock *sk, const int active);
230 extern int dccp_invalid_packet(struct sk_buff *skb);
232 static inline int dccp_bad_service_code(const struct sock *sk,
233 const __be32 service)
234 {
235 const struct dccp_sock *dp = dccp_sk(sk);
237 if (dp->dccps_service == service)
238 return 0;
239 return !dccp_list_has_service(dp->dccps_service_list, service);
240 }
242 struct dccp_skb_cb {
243 __u8 dccpd_type:4;
244 __u8 dccpd_ccval:4;
245 __u8 dccpd_reset_code;
246 __u16 dccpd_opt_len;
247 __u64 dccpd_seq;
248 __u64 dccpd_ack_seq;
249 };
251 #define DCCP_SKB_CB(__skb) ((struct dccp_skb_cb *)&((__skb)->cb[0]))
253 static inline int dccp_non_data_packet(const struct sk_buff *skb)
254 {
255 const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
257 return type == DCCP_PKT_ACK ||
258 type == DCCP_PKT_CLOSE ||
259 type == DCCP_PKT_CLOSEREQ ||
260 type == DCCP_PKT_RESET ||
261 type == DCCP_PKT_SYNC ||
262 type == DCCP_PKT_SYNCACK;
263 }
265 static inline int dccp_packet_without_ack(const struct sk_buff *skb)
266 {
267 const __u8 type = DCCP_SKB_CB(skb)->dccpd_type;
269 return type == DCCP_PKT_DATA || type == DCCP_PKT_REQUEST;
270 }
272 #define DCCP_MAX_SEQNO ((((u64)1) << 48) - 1)
273 #define DCCP_PKT_WITHOUT_ACK_SEQ (DCCP_MAX_SEQNO << 2)
275 static inline void dccp_set_seqno(u64 *seqno, u64 value)
276 {
277 if (value > DCCP_MAX_SEQNO)
278 value -= DCCP_MAX_SEQNO + 1;
279 *seqno = value;
280 }
282 static inline u64 dccp_delta_seqno(u64 seqno1, u64 seqno2)
283 {
284 return ((seqno2 << 16) - (seqno1 << 16)) >> 16;
285 }
287 static inline void dccp_inc_seqno(u64 *seqno)
288 {
289 if (++*seqno > DCCP_MAX_SEQNO)
290 *seqno = 0;
291 }
293 static inline void dccp_hdr_set_seq(struct dccp_hdr *dh, const u64 gss)
294 {
295 struct dccp_hdr_ext *dhx = (struct dccp_hdr_ext *)((void *)dh +
296 sizeof(*dh));
297 dh->dccph_seq2 = 0;
298 dh->dccph_seq = htons((gss >> 32) & 0xfffff);
299 dhx->dccph_seq_low = htonl(gss & 0xffffffff);
300 }
302 static inline void dccp_hdr_set_ack(struct dccp_hdr_ack_bits *dhack,
303 const u64 gsr)
304 {
305 dhack->dccph_reserved1 = 0;
306 dhack->dccph_ack_nr_high = htons(gsr >> 32);
307 dhack->dccph_ack_nr_low = htonl(gsr & 0xffffffff);
308 }
310 static inline void dccp_update_gsr(struct sock *sk, u64 seq)
311 {
312 struct dccp_sock *dp = dccp_sk(sk);
313 const struct dccp_minisock *dmsk = dccp_msk(sk);
315 dp->dccps_gsr = seq;
316 dccp_set_seqno(&dp->dccps_swl,
317 dp->dccps_gsr + 1 - (dmsk->dccpms_sequence_window / 4));
318 dccp_set_seqno(&dp->dccps_swh,
319 dp->dccps_gsr + (3 * dmsk->dccpms_sequence_window) / 4);
320 }
322 static inline void dccp_update_gss(struct sock *sk, u64 seq)
323 {
324 struct dccp_sock *dp = dccp_sk(sk);
326 dp->dccps_awh = dp->dccps_gss = seq;
327 dccp_set_seqno(&dp->dccps_awl,
328 (dp->dccps_gss -
329 dccp_msk(sk)->dccpms_sequence_window + 1));
330 }
332 static inline int dccp_ack_pending(const struct sock *sk)
333 {
334 const struct dccp_sock *dp = dccp_sk(sk);
335 return dp->dccps_timestamp_echo != 0 ||
336 #ifdef CONFIG_IP_DCCP_ACKVEC
337 (dccp_msk(sk)->dccpms_send_ack_vector &&
338 dccp_ackvec_pending(dp->dccps_hc_rx_ackvec)) ||
339 #endif
340 inet_csk_ack_scheduled(sk);
341 }
343 extern int dccp_insert_options(struct sock *sk, struct sk_buff *skb);
344 extern int dccp_insert_option_elapsed_time(struct sock *sk,
345 struct sk_buff *skb,
346 u32 elapsed_time);
347 extern int dccp_insert_option_timestamp(struct sock *sk,
348 struct sk_buff *skb);
349 extern int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
350 unsigned char option,
351 const void *value, unsigned char len);
353 extern void dccp_timestamp(const struct sock *sk, struct timeval *tv);
355 static inline suseconds_t timeval_usecs(const struct timeval *tv)
356 {
357 return tv->tv_sec * USEC_PER_SEC + tv->tv_usec;
358 }
360 static inline suseconds_t timeval_delta(const struct timeval *large,
361 const struct timeval *small)
362 {
363 time_t secs = large->tv_sec - small->tv_sec;
364 suseconds_t usecs = large->tv_usec - small->tv_usec;
366 if (usecs < 0) {
367 secs--;
368 usecs += USEC_PER_SEC;
369 }
370 return secs * USEC_PER_SEC + usecs;
371 }
373 static inline void timeval_add_usecs(struct timeval *tv,
374 const suseconds_t usecs)
375 {
376 tv->tv_usec += usecs;
377 while (tv->tv_usec >= USEC_PER_SEC) {
378 tv->tv_sec++;
379 tv->tv_usec -= USEC_PER_SEC;
380 }
381 }
383 static inline void timeval_sub_usecs(struct timeval *tv,
384 const suseconds_t usecs)
385 {
386 tv->tv_usec -= usecs;
387 while (tv->tv_usec < 0) {
388 tv->tv_sec--;
389 tv->tv_usec += USEC_PER_SEC;
390 }
391 }
393 #ifdef CONFIG_SYSCTL
394 extern int dccp_sysctl_init(void);
395 extern void dccp_sysctl_exit(void);
396 #else
397 static inline int dccp_sysctl_init(void)
398 {
399 return 0;
400 }
402 static inline void dccp_sysctl_exit(void)
403 {
404 }
405 #endif
407 #endif /* _DCCP_H */