Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * IPVS An implementation of the IP virtual server support for the | |
3 | * LINUX operating system. IPVS is now implemented as a module | |
4 | * over the NetFilter framework. IPVS can be used to build a | |
5 | * high-performance and highly available server based on a | |
6 | * cluster of servers. | |
7 | * | |
b880c1f0 HS |
8 | * Version 1, is capable of handling both version 0 and 1 messages. |
9 | * Version 0 is the plain old format. | |
10 | * Note Version 0 receivers will just drop Ver 1 messages. | |
11 | * Version 1 is capable of handle IPv6, Persistence data, | |
12 | * time-outs, and firewall marks. | |
13 | * In ver.1 "ip_vs_sync_conn_options" will be sent in netw. order. | |
14 | * Ver. 0 can be turned on by sysctl -w net.ipv4.vs.sync_version=0 | |
15 | * | |
16 | * Definitions Message: is a complete datagram | |
17 | * Sync_conn: is a part of a Message | |
18 | * Param Data is an option to a Sync_conn. | |
19 | * | |
1da177e4 LT |
20 | * Authors: Wensong Zhang <wensong@linuxvirtualserver.org> |
21 | * | |
22 | * ip_vs_sync: sync connection info from master load balancer to backups | |
23 | * through multicast | |
24 | * | |
25 | * Changes: | |
26 | * Alexandre Cassen : Added master & backup support at a time. | |
27 | * Alexandre Cassen : Added SyncID support for incoming sync | |
28 | * messages filtering. | |
29 | * Justin Ossevoort : Fix endian problem on sync message size. | |
b880c1f0 HS |
30 | * Hans Schillstrom : Added Version 1: i.e. IPv6, |
31 | * Persistence support, fwmark and time-out. | |
1da177e4 LT |
32 | */ |
33 | ||
9aada7ac HE |
34 | #define KMSG_COMPONENT "IPVS" |
35 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
36 | ||
1da177e4 LT |
37 | #include <linux/module.h> |
38 | #include <linux/slab.h> | |
14c85021 | 39 | #include <linux/inetdevice.h> |
1da177e4 LT |
40 | #include <linux/net.h> |
41 | #include <linux/completion.h> | |
42 | #include <linux/delay.h> | |
43 | #include <linux/skbuff.h> | |
44 | #include <linux/in.h> | |
45 | #include <linux/igmp.h> /* for ip_mc_join_group */ | |
14c85021 | 46 | #include <linux/udp.h> |
e6dd731c | 47 | #include <linux/err.h> |
998e7a76 | 48 | #include <linux/kthread.h> |
ba6fd850 | 49 | #include <linux/wait.h> |
e6f225eb | 50 | #include <linux/kernel.h> |
1da177e4 | 51 | |
fe5e7a1e HS |
52 | #include <asm/unaligned.h> /* Used for ntoh_seq and hton_seq */ |
53 | ||
1da177e4 LT |
54 | #include <net/ip.h> |
55 | #include <net/sock.h> | |
1da177e4 LT |
56 | |
57 | #include <net/ip_vs.h> | |
58 | ||
59 | #define IP_VS_SYNC_GROUP 0xe0000051 /* multicast addr - 224.0.0.81 */ | |
60 | #define IP_VS_SYNC_PORT 8848 /* multicast port */ | |
61 | ||
2981bc9a | 62 | #define SYNC_PROTO_VER 1 /* Protocol version in header */ |
1da177e4 | 63 | |
ae1d48b2 | 64 | static struct lock_class_key __ipvs_sync_key; |
1da177e4 LT |
65 | /* |
66 | * IPVS sync connection entry | |
2981bc9a | 67 | * Version 0, i.e. original version. |
1da177e4 | 68 | */ |
2981bc9a | 69 | struct ip_vs_sync_conn_v0 { |
1da177e4 LT |
70 | __u8 reserved; |
71 | ||
72 | /* Protocol, addresses and port numbers */ | |
73 | __u8 protocol; /* Which protocol (TCP/UDP) */ | |
014d730d AV |
74 | __be16 cport; |
75 | __be16 vport; | |
76 | __be16 dport; | |
77 | __be32 caddr; /* client address */ | |
78 | __be32 vaddr; /* virtual address */ | |
79 | __be32 daddr; /* destination address */ | |
1da177e4 LT |
80 | |
81 | /* Flags and state transition */ | |
014d730d AV |
82 | __be16 flags; /* status flags */ |
83 | __be16 state; /* state info */ | |
1da177e4 LT |
84 | |
85 | /* The sequence options start here */ | |
86 | }; | |
87 | ||
88 | struct ip_vs_sync_conn_options { | |
89 | struct ip_vs_seq in_seq; /* incoming seq. struct */ | |
90 | struct ip_vs_seq out_seq; /* outgoing seq. struct */ | |
91 | }; | |
92 | ||
2981bc9a HS |
93 | /* |
94 | Sync Connection format (sync_conn) | |
95 | ||
96 | 0 1 2 3 | |
97 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
98 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
99 | | Type | Protocol | Ver. | Size | | |
100 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
101 | | Flags | | |
102 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
103 | | State | cport | | |
104 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
105 | | vport | dport | | |
106 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
107 | | fwmark | | |
108 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
109 | | timeout (in sec.) | | |
110 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
111 | | ... | | |
112 | | IP-Addresses (v4 or v6) | | |
113 | | ... | | |
114 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
115 | Optional Parameters. | |
116 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
117 | | Param. Type | Param. Length | Param. data | | |
118 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | |
119 | | ... | | |
120 | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
121 | | | Param Type | Param. Length | | |
122 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
123 | | Param data | | |
124 | | Last Param data should be padded for 32 bit alignment | | |
125 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
126 | */ | |
127 | ||
128 | /* | |
129 | * Type 0, IPv4 sync connection format | |
130 | */ | |
131 | struct ip_vs_sync_v4 { | |
132 | __u8 type; | |
133 | __u8 protocol; /* Which protocol (TCP/UDP) */ | |
134 | __be16 ver_size; /* Version msb 4 bits */ | |
135 | /* Flags and state transition */ | |
136 | __be32 flags; /* status flags */ | |
137 | __be16 state; /* state info */ | |
138 | /* Protocol, addresses and port numbers */ | |
139 | __be16 cport; | |
140 | __be16 vport; | |
141 | __be16 dport; | |
142 | __be32 fwmark; /* Firewall mark from skb */ | |
143 | __be32 timeout; /* cp timeout */ | |
144 | __be32 caddr; /* client address */ | |
145 | __be32 vaddr; /* virtual address */ | |
146 | __be32 daddr; /* destination address */ | |
147 | /* The sequence options start here */ | |
148 | /* PE data padded to 32bit alignment after seq. options */ | |
149 | }; | |
150 | /* | |
151 | * Type 2 messages IPv6 | |
152 | */ | |
153 | struct ip_vs_sync_v6 { | |
154 | __u8 type; | |
155 | __u8 protocol; /* Which protocol (TCP/UDP) */ | |
156 | __be16 ver_size; /* Version msb 4 bits */ | |
157 | /* Flags and state transition */ | |
158 | __be32 flags; /* status flags */ | |
159 | __be16 state; /* state info */ | |
160 | /* Protocol, addresses and port numbers */ | |
161 | __be16 cport; | |
162 | __be16 vport; | |
163 | __be16 dport; | |
164 | __be32 fwmark; /* Firewall mark from skb */ | |
165 | __be32 timeout; /* cp timeout */ | |
166 | struct in6_addr caddr; /* client address */ | |
167 | struct in6_addr vaddr; /* virtual address */ | |
168 | struct in6_addr daddr; /* destination address */ | |
169 | /* The sequence options start here */ | |
170 | /* PE data padded to 32bit alignment after seq. options */ | |
171 | }; | |
172 | ||
173 | union ip_vs_sync_conn { | |
174 | struct ip_vs_sync_v4 v4; | |
175 | struct ip_vs_sync_v6 v6; | |
176 | }; | |
177 | ||
178 | /* Bits in Type field in above */ | |
179 | #define STYPE_INET6 0 | |
180 | #define STYPE_F_INET6 (1 << STYPE_INET6) | |
181 | ||
182 | #define SVER_SHIFT 12 /* Shift to get version */ | |
183 | #define SVER_MASK 0x0fff /* Mask to strip version */ | |
184 | ||
185 | #define IPVS_OPT_SEQ_DATA 1 | |
186 | #define IPVS_OPT_PE_DATA 2 | |
187 | #define IPVS_OPT_PE_NAME 3 | |
188 | #define IPVS_OPT_PARAM 7 | |
189 | ||
190 | #define IPVS_OPT_F_SEQ_DATA (1 << (IPVS_OPT_SEQ_DATA-1)) | |
191 | #define IPVS_OPT_F_PE_DATA (1 << (IPVS_OPT_PE_DATA-1)) | |
192 | #define IPVS_OPT_F_PE_NAME (1 << (IPVS_OPT_PE_NAME-1)) | |
193 | #define IPVS_OPT_F_PARAM (1 << (IPVS_OPT_PARAM-1)) | |
194 | ||
cc0191ae | 195 | struct ip_vs_sync_thread_data { |
37b68e6d | 196 | struct netns_ipvs *ipvs; |
998e7a76 SW |
197 | struct socket *sock; |
198 | char *buf; | |
f73181c8 | 199 | int id; |
cc0191ae NH |
200 | }; |
201 | ||
2981bc9a HS |
202 | /* Version 0 definition of packet sizes */ |
203 | #define SIMPLE_CONN_SIZE (sizeof(struct ip_vs_sync_conn_v0)) | |
1da177e4 | 204 | #define FULL_CONN_SIZE \ |
2981bc9a | 205 | (sizeof(struct ip_vs_sync_conn_v0) + sizeof(struct ip_vs_sync_conn_options)) |
1da177e4 LT |
206 | |
207 | ||
208 | /* | |
2981bc9a HS |
209 | The master mulitcasts messages (Datagrams) to the backup load balancers |
210 | in the following format. | |
211 | ||
212 | Version 1: | |
213 | Note, first byte should be Zero, so ver 0 receivers will drop the packet. | |
1da177e4 LT |
214 | |
215 | 0 1 2 3 | |
216 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
217 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
2981bc9a HS |
218 | | 0 | SyncID | Size | |
219 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
220 | | Count Conns | Version | Reserved, set to Zero | | |
1da177e4 LT |
221 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
222 | | | | |
223 | | IPVS Sync Connection (1) | | |
224 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
225 | | . | | |
2981bc9a | 226 | ~ . ~ |
1da177e4 LT |
227 | | . | |
228 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
229 | | | | |
230 | | IPVS Sync Connection (n) | | |
231 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
2981bc9a HS |
232 | |
233 | Version 0 Header | |
234 | 0 1 2 3 | |
235 | 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 | |
236 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
237 | | Count Conns | SyncID | Size | | |
238 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | |
239 | | IPVS Sync Connection (1) | | |
1da177e4 LT |
240 | */ |
241 | ||
242 | #define SYNC_MESG_HEADER_LEN 4 | |
e6f225eb | 243 | #define MAX_CONNS_PER_SYNCBUFF 255 /* nr_conns in ip_vs_sync_mesg is 8 bit */ |
1da177e4 | 244 | |
2981bc9a | 245 | /* Version 0 header */ |
986a0757 | 246 | struct ip_vs_sync_mesg_v0 { |
1da177e4 LT |
247 | __u8 nr_conns; |
248 | __u8 syncid; | |
38561437 | 249 | __be16 size; |
1da177e4 LT |
250 | |
251 | /* ip_vs_sync_conn entries start here */ | |
252 | }; | |
253 | ||
2981bc9a | 254 | /* Version 1 header */ |
986a0757 | 255 | struct ip_vs_sync_mesg { |
2981bc9a HS |
256 | __u8 reserved; /* must be zero */ |
257 | __u8 syncid; | |
38561437 | 258 | __be16 size; |
2981bc9a HS |
259 | __u8 nr_conns; |
260 | __s8 version; /* SYNC_PROTO_VER */ | |
261 | __u16 spare; | |
262 | /* ip_vs_sync_conn entries start here */ | |
263 | }; | |
264 | ||
d3328817 JA |
265 | union ipvs_sockaddr { |
266 | struct sockaddr_in in; | |
267 | struct sockaddr_in6 in6; | |
268 | }; | |
269 | ||
1da177e4 LT |
270 | struct ip_vs_sync_buff { |
271 | struct list_head list; | |
272 | unsigned long firstuse; | |
273 | ||
274 | /* pointers for the message data */ | |
275 | struct ip_vs_sync_mesg *mesg; | |
276 | unsigned char *head; | |
277 | unsigned char *end; | |
278 | }; | |
279 | ||
fe5e7a1e HS |
280 | /* |
281 | * Copy of struct ip_vs_seq | |
282 | * From unaligned network order to aligned host order | |
283 | */ | |
284 | static void ntoh_seq(struct ip_vs_seq *no, struct ip_vs_seq *ho) | |
285 | { | |
286 | ho->init_seq = get_unaligned_be32(&no->init_seq); | |
287 | ho->delta = get_unaligned_be32(&no->delta); | |
288 | ho->previous_delta = get_unaligned_be32(&no->previous_delta); | |
289 | } | |
1da177e4 | 290 | |
986a0757 HS |
291 | /* |
292 | * Copy of struct ip_vs_seq | |
293 | * From Aligned host order to unaligned network order | |
294 | */ | |
295 | static void hton_seq(struct ip_vs_seq *ho, struct ip_vs_seq *no) | |
296 | { | |
297 | put_unaligned_be32(ho->init_seq, &no->init_seq); | |
298 | put_unaligned_be32(ho->delta, &no->delta); | |
299 | put_unaligned_be32(ho->previous_delta, &no->previous_delta); | |
300 | } | |
301 | ||
f73181c8 PNA |
302 | static inline struct ip_vs_sync_buff * |
303 | sb_dequeue(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms) | |
1da177e4 LT |
304 | { |
305 | struct ip_vs_sync_buff *sb; | |
306 | ||
f131315f | 307 | spin_lock_bh(&ipvs->sync_lock); |
f73181c8 | 308 | if (list_empty(&ms->sync_queue)) { |
1da177e4 | 309 | sb = NULL; |
1c003b15 | 310 | __set_current_state(TASK_INTERRUPTIBLE); |
1da177e4 | 311 | } else { |
f73181c8 | 312 | sb = list_entry(ms->sync_queue.next, struct ip_vs_sync_buff, |
1da177e4 LT |
313 | list); |
314 | list_del(&sb->list); | |
f73181c8 PNA |
315 | ms->sync_queue_len--; |
316 | if (!ms->sync_queue_len) | |
317 | ms->sync_queue_delay = 0; | |
1da177e4 | 318 | } |
f131315f | 319 | spin_unlock_bh(&ipvs->sync_lock); |
1da177e4 LT |
320 | |
321 | return sb; | |
322 | } | |
323 | ||
986a0757 HS |
324 | /* |
325 | * Create a new sync buffer for Version 1 proto. | |
326 | */ | |
f131315f | 327 | static inline struct ip_vs_sync_buff * |
e4ff6751 | 328 | ip_vs_sync_buff_create(struct netns_ipvs *ipvs, unsigned int len) |
1da177e4 LT |
329 | { |
330 | struct ip_vs_sync_buff *sb; | |
331 | ||
332 | if (!(sb=kmalloc(sizeof(struct ip_vs_sync_buff), GFP_ATOMIC))) | |
333 | return NULL; | |
334 | ||
e4ff6751 JA |
335 | len = max_t(unsigned int, len + sizeof(struct ip_vs_sync_mesg), |
336 | ipvs->mcfg.sync_maxlen); | |
337 | sb->mesg = kmalloc(len, GFP_ATOMIC); | |
f131315f | 338 | if (!sb->mesg) { |
1da177e4 LT |
339 | kfree(sb); |
340 | return NULL; | |
341 | } | |
f73181c8 | 342 | sb->mesg->reserved = 0; /* old nr_conns i.e. must be zero now */ |
986a0757 | 343 | sb->mesg->version = SYNC_PROTO_VER; |
e4ff6751 | 344 | sb->mesg->syncid = ipvs->mcfg.syncid; |
38561437 | 345 | sb->mesg->size = htons(sizeof(struct ip_vs_sync_mesg)); |
986a0757 HS |
346 | sb->mesg->nr_conns = 0; |
347 | sb->mesg->spare = 0; | |
348 | sb->head = (unsigned char *)sb->mesg + sizeof(struct ip_vs_sync_mesg); | |
e4ff6751 | 349 | sb->end = (unsigned char *)sb->mesg + len; |
986a0757 | 350 | |
1da177e4 LT |
351 | sb->firstuse = jiffies; |
352 | return sb; | |
353 | } | |
354 | ||
355 | static inline void ip_vs_sync_buff_release(struct ip_vs_sync_buff *sb) | |
356 | { | |
357 | kfree(sb->mesg); | |
358 | kfree(sb); | |
359 | } | |
360 | ||
f73181c8 PNA |
361 | static inline void sb_queue_tail(struct netns_ipvs *ipvs, |
362 | struct ipvs_master_sync_state *ms) | |
998e7a76 | 363 | { |
f73181c8 | 364 | struct ip_vs_sync_buff *sb = ms->sync_buff; |
f131315f HS |
365 | |
366 | spin_lock(&ipvs->sync_lock); | |
1c003b15 | 367 | if (ipvs->sync_state & IP_VS_STATE_MASTER && |
f73181c8 PNA |
368 | ms->sync_queue_len < sysctl_sync_qlen_max(ipvs)) { |
369 | if (!ms->sync_queue_len) | |
370 | schedule_delayed_work(&ms->master_wakeup_work, | |
1c003b15 | 371 | max(IPVS_SYNC_SEND_DELAY, 1)); |
f73181c8 PNA |
372 | ms->sync_queue_len++; |
373 | list_add_tail(&sb->list, &ms->sync_queue); | |
374 | if ((++ms->sync_queue_delay) == IPVS_SYNC_WAKEUP_RATE) | |
375 | wake_up_process(ms->master_thread); | |
1c003b15 | 376 | } else |
998e7a76 | 377 | ip_vs_sync_buff_release(sb); |
f131315f | 378 | spin_unlock(&ipvs->sync_lock); |
998e7a76 SW |
379 | } |
380 | ||
1da177e4 LT |
381 | /* |
382 | * Get the current sync buffer if it has been created for more | |
383 | * than the specified time or the specified time is zero. | |
384 | */ | |
385 | static inline struct ip_vs_sync_buff * | |
f73181c8 PNA |
386 | get_curr_sync_buff(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms, |
387 | unsigned long time) | |
1da177e4 LT |
388 | { |
389 | struct ip_vs_sync_buff *sb; | |
390 | ||
f131315f | 391 | spin_lock_bh(&ipvs->sync_buff_lock); |
f73181c8 PNA |
392 | sb = ms->sync_buff; |
393 | if (sb && time_after_eq(jiffies - sb->firstuse, time)) { | |
394 | ms->sync_buff = NULL; | |
1c003b15 | 395 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
396 | } else |
397 | sb = NULL; | |
f131315f | 398 | spin_unlock_bh(&ipvs->sync_buff_lock); |
1da177e4 LT |
399 | return sb; |
400 | } | |
401 | ||
f73181c8 PNA |
402 | static inline int |
403 | select_master_thread_id(struct netns_ipvs *ipvs, struct ip_vs_conn *cp) | |
f131315f | 404 | { |
f73181c8 | 405 | return ((long) cp >> (1 + ilog2(sizeof(*cp)))) & ipvs->threads_mask; |
b880c1f0 HS |
406 | } |
407 | ||
408 | /* | |
409 | * Create a new sync buffer for Version 0 proto. | |
410 | */ | |
f131315f | 411 | static inline struct ip_vs_sync_buff * |
e4ff6751 | 412 | ip_vs_sync_buff_create_v0(struct netns_ipvs *ipvs, unsigned int len) |
b880c1f0 HS |
413 | { |
414 | struct ip_vs_sync_buff *sb; | |
415 | struct ip_vs_sync_mesg_v0 *mesg; | |
416 | ||
417 | if (!(sb=kmalloc(sizeof(struct ip_vs_sync_buff), GFP_ATOMIC))) | |
418 | return NULL; | |
419 | ||
e4ff6751 JA |
420 | len = max_t(unsigned int, len + sizeof(struct ip_vs_sync_mesg_v0), |
421 | ipvs->mcfg.sync_maxlen); | |
422 | sb->mesg = kmalloc(len, GFP_ATOMIC); | |
f131315f | 423 | if (!sb->mesg) { |
b880c1f0 HS |
424 | kfree(sb); |
425 | return NULL; | |
426 | } | |
427 | mesg = (struct ip_vs_sync_mesg_v0 *)sb->mesg; | |
428 | mesg->nr_conns = 0; | |
e4ff6751 | 429 | mesg->syncid = ipvs->mcfg.syncid; |
38561437 | 430 | mesg->size = htons(sizeof(struct ip_vs_sync_mesg_v0)); |
f131315f | 431 | sb->head = (unsigned char *)mesg + sizeof(struct ip_vs_sync_mesg_v0); |
e4ff6751 | 432 | sb->end = (unsigned char *)mesg + len; |
b880c1f0 HS |
433 | sb->firstuse = jiffies; |
434 | return sb; | |
435 | } | |
436 | ||
4d0c875d JA |
437 | /* Check if connection is controlled by persistence */ |
438 | static inline bool in_persistence(struct ip_vs_conn *cp) | |
439 | { | |
440 | for (cp = cp->control; cp; cp = cp->control) { | |
441 | if (cp->flags & IP_VS_CONN_F_TEMPLATE) | |
442 | return true; | |
443 | } | |
444 | return false; | |
445 | } | |
446 | ||
749c42b6 JA |
447 | /* Check if conn should be synced. |
448 | * pkts: conn packets, use sysctl_sync_threshold to avoid packet check | |
449 | * - (1) sync_refresh_period: reduce sync rate. Additionally, retry | |
450 | * sync_retries times with period of sync_refresh_period/8 | |
451 | * - (2) if both sync_refresh_period and sync_period are 0 send sync only | |
452 | * for state changes or only once when pkts matches sync_threshold | |
453 | * - (3) templates: rate can be reduced only with sync_refresh_period or | |
454 | * with (2) | |
455 | */ | |
456 | static int ip_vs_sync_conn_needed(struct netns_ipvs *ipvs, | |
457 | struct ip_vs_conn *cp, int pkts) | |
458 | { | |
459 | unsigned long orig = ACCESS_ONCE(cp->sync_endtime); | |
460 | unsigned long now = jiffies; | |
461 | unsigned long n = (now + cp->timeout) & ~3UL; | |
462 | unsigned int sync_refresh_period; | |
463 | int sync_period; | |
464 | int force; | |
465 | ||
466 | /* Check if we sync in current state */ | |
467 | if (unlikely(cp->flags & IP_VS_CONN_F_TEMPLATE)) | |
468 | force = 0; | |
4d0c875d JA |
469 | else if (unlikely(sysctl_sync_persist_mode(ipvs) && in_persistence(cp))) |
470 | return 0; | |
749c42b6 JA |
471 | else if (likely(cp->protocol == IPPROTO_TCP)) { |
472 | if (!((1 << cp->state) & | |
473 | ((1 << IP_VS_TCP_S_ESTABLISHED) | | |
474 | (1 << IP_VS_TCP_S_FIN_WAIT) | | |
475 | (1 << IP_VS_TCP_S_CLOSE) | | |
476 | (1 << IP_VS_TCP_S_CLOSE_WAIT) | | |
477 | (1 << IP_VS_TCP_S_TIME_WAIT)))) | |
478 | return 0; | |
479 | force = cp->state != cp->old_state; | |
480 | if (force && cp->state != IP_VS_TCP_S_ESTABLISHED) | |
481 | goto set; | |
482 | } else if (unlikely(cp->protocol == IPPROTO_SCTP)) { | |
483 | if (!((1 << cp->state) & | |
484 | ((1 << IP_VS_SCTP_S_ESTABLISHED) | | |
61e7c420 JA |
485 | (1 << IP_VS_SCTP_S_SHUTDOWN_SENT) | |
486 | (1 << IP_VS_SCTP_S_SHUTDOWN_RECEIVED) | | |
487 | (1 << IP_VS_SCTP_S_SHUTDOWN_ACK_SENT) | | |
488 | (1 << IP_VS_SCTP_S_CLOSED)))) | |
749c42b6 JA |
489 | return 0; |
490 | force = cp->state != cp->old_state; | |
491 | if (force && cp->state != IP_VS_SCTP_S_ESTABLISHED) | |
492 | goto set; | |
493 | } else { | |
494 | /* UDP or another protocol with single state */ | |
495 | force = 0; | |
496 | } | |
497 | ||
498 | sync_refresh_period = sysctl_sync_refresh_period(ipvs); | |
499 | if (sync_refresh_period > 0) { | |
500 | long diff = n - orig; | |
501 | long min_diff = max(cp->timeout >> 1, 10UL * HZ); | |
502 | ||
503 | /* Avoid sync if difference is below sync_refresh_period | |
504 | * and below the half timeout. | |
505 | */ | |
506 | if (abs(diff) < min_t(long, sync_refresh_period, min_diff)) { | |
507 | int retries = orig & 3; | |
508 | ||
509 | if (retries >= sysctl_sync_retries(ipvs)) | |
510 | return 0; | |
511 | if (time_before(now, orig - cp->timeout + | |
512 | (sync_refresh_period >> 3))) | |
513 | return 0; | |
514 | n |= retries + 1; | |
515 | } | |
516 | } | |
517 | sync_period = sysctl_sync_period(ipvs); | |
518 | if (sync_period > 0) { | |
519 | if (!(cp->flags & IP_VS_CONN_F_TEMPLATE) && | |
520 | pkts % sync_period != sysctl_sync_threshold(ipvs)) | |
521 | return 0; | |
522 | } else if (sync_refresh_period <= 0 && | |
523 | pkts != sysctl_sync_threshold(ipvs)) | |
524 | return 0; | |
525 | ||
526 | set: | |
527 | cp->old_state = cp->state; | |
528 | n = cmpxchg(&cp->sync_endtime, orig, n); | |
529 | return n == orig || force; | |
530 | } | |
531 | ||
b880c1f0 HS |
532 | /* |
533 | * Version 0 , could be switched in by sys_ctl. | |
534 | * Add an ip_vs_conn information into the current sync_buff. | |
535 | */ | |
72e9481e | 536 | static void ip_vs_sync_conn_v0(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, |
749c42b6 | 537 | int pkts) |
b880c1f0 HS |
538 | { |
539 | struct ip_vs_sync_mesg_v0 *m; | |
540 | struct ip_vs_sync_conn_v0 *s; | |
f73181c8 PNA |
541 | struct ip_vs_sync_buff *buff; |
542 | struct ipvs_master_sync_state *ms; | |
543 | int id; | |
e4ff6751 | 544 | unsigned int len; |
b880c1f0 HS |
545 | |
546 | if (unlikely(cp->af != AF_INET)) | |
547 | return; | |
548 | /* Do not sync ONE PACKET */ | |
549 | if (cp->flags & IP_VS_CONN_F_ONE_PACKET) | |
550 | return; | |
551 | ||
749c42b6 JA |
552 | if (!ip_vs_sync_conn_needed(ipvs, cp, pkts)) |
553 | return; | |
554 | ||
ac69269a | 555 | spin_lock_bh(&ipvs->sync_buff_lock); |
f73181c8 | 556 | if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) { |
ac69269a | 557 | spin_unlock_bh(&ipvs->sync_buff_lock); |
f73181c8 PNA |
558 | return; |
559 | } | |
560 | ||
561 | id = select_master_thread_id(ipvs, cp); | |
562 | ms = &ipvs->ms[id]; | |
563 | buff = ms->sync_buff; | |
e4ff6751 JA |
564 | len = (cp->flags & IP_VS_CONN_F_SEQ_MASK) ? FULL_CONN_SIZE : |
565 | SIMPLE_CONN_SIZE; | |
f73181c8 PNA |
566 | if (buff) { |
567 | m = (struct ip_vs_sync_mesg_v0 *) buff->mesg; | |
568 | /* Send buffer if it is for v1 */ | |
e4ff6751 | 569 | if (buff->head + len > buff->end || !m->nr_conns) { |
f73181c8 PNA |
570 | sb_queue_tail(ipvs, ms); |
571 | ms->sync_buff = NULL; | |
572 | buff = NULL; | |
573 | } | |
574 | } | |
575 | if (!buff) { | |
e4ff6751 | 576 | buff = ip_vs_sync_buff_create_v0(ipvs, len); |
f73181c8 | 577 | if (!buff) { |
ac69269a | 578 | spin_unlock_bh(&ipvs->sync_buff_lock); |
b880c1f0 HS |
579 | pr_err("ip_vs_sync_buff_create failed.\n"); |
580 | return; | |
581 | } | |
f73181c8 | 582 | ms->sync_buff = buff; |
b880c1f0 HS |
583 | } |
584 | ||
f73181c8 PNA |
585 | m = (struct ip_vs_sync_mesg_v0 *) buff->mesg; |
586 | s = (struct ip_vs_sync_conn_v0 *) buff->head; | |
b880c1f0 HS |
587 | |
588 | /* copy members */ | |
589 | s->reserved = 0; | |
590 | s->protocol = cp->protocol; | |
591 | s->cport = cp->cport; | |
592 | s->vport = cp->vport; | |
593 | s->dport = cp->dport; | |
594 | s->caddr = cp->caddr.ip; | |
595 | s->vaddr = cp->vaddr.ip; | |
596 | s->daddr = cp->daddr.ip; | |
597 | s->flags = htons(cp->flags & ~IP_VS_CONN_F_HASHED); | |
598 | s->state = htons(cp->state); | |
599 | if (cp->flags & IP_VS_CONN_F_SEQ_MASK) { | |
600 | struct ip_vs_sync_conn_options *opt = | |
601 | (struct ip_vs_sync_conn_options *)&s[1]; | |
602 | memcpy(opt, &cp->in_seq, sizeof(*opt)); | |
603 | } | |
604 | ||
605 | m->nr_conns++; | |
38561437 | 606 | m->size = htons(ntohs(m->size) + len); |
f73181c8 | 607 | buff->head += len; |
ac69269a | 608 | spin_unlock_bh(&ipvs->sync_buff_lock); |
b880c1f0 HS |
609 | |
610 | /* synchronize its controller if it has */ | |
749c42b6 JA |
611 | cp = cp->control; |
612 | if (cp) { | |
613 | if (cp->flags & IP_VS_CONN_F_TEMPLATE) | |
614 | pkts = atomic_add_return(1, &cp->in_pkts); | |
615 | else | |
616 | pkts = sysctl_sync_threshold(ipvs); | |
b61a8c1a | 617 | ip_vs_sync_conn(ipvs, cp, pkts); |
749c42b6 | 618 | } |
b880c1f0 HS |
619 | } |
620 | ||
1da177e4 LT |
621 | /* |
622 | * Add an ip_vs_conn information into the current sync_buff. | |
623 | * Called by ip_vs_in. | |
986a0757 | 624 | * Sending Version 1 messages |
1da177e4 | 625 | */ |
b61a8c1a | 626 | void ip_vs_sync_conn(struct netns_ipvs *ipvs, struct ip_vs_conn *cp, int pkts) |
1da177e4 LT |
627 | { |
628 | struct ip_vs_sync_mesg *m; | |
986a0757 | 629 | union ip_vs_sync_conn *s; |
f73181c8 PNA |
630 | struct ip_vs_sync_buff *buff; |
631 | struct ipvs_master_sync_state *ms; | |
632 | int id; | |
986a0757 HS |
633 | __u8 *p; |
634 | unsigned int len, pe_name_len, pad; | |
635 | ||
b880c1f0 | 636 | /* Handle old version of the protocol */ |
7532e8d4 | 637 | if (sysctl_sync_ver(ipvs) == 0) { |
72e9481e | 638 | ip_vs_sync_conn_v0(ipvs, cp, pkts); |
b880c1f0 HS |
639 | return; |
640 | } | |
986a0757 HS |
641 | /* Do not sync ONE PACKET */ |
642 | if (cp->flags & IP_VS_CONN_F_ONE_PACKET) | |
643 | goto control; | |
644 | sloop: | |
749c42b6 JA |
645 | if (!ip_vs_sync_conn_needed(ipvs, cp, pkts)) |
646 | goto control; | |
647 | ||
986a0757 HS |
648 | /* Sanity checks */ |
649 | pe_name_len = 0; | |
650 | if (cp->pe_data_len) { | |
651 | if (!cp->pe_data || !cp->dest) { | |
652 | IP_VS_ERR_RL("SYNC, connection pe_data invalid\n"); | |
653 | return; | |
654 | } | |
655 | pe_name_len = strnlen(cp->pe->name, IP_VS_PENAME_MAXLEN); | |
656 | } | |
1da177e4 | 657 | |
ac69269a | 658 | spin_lock_bh(&ipvs->sync_buff_lock); |
f73181c8 | 659 | if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) { |
ac69269a | 660 | spin_unlock_bh(&ipvs->sync_buff_lock); |
f73181c8 PNA |
661 | return; |
662 | } | |
663 | ||
664 | id = select_master_thread_id(ipvs, cp); | |
665 | ms = &ipvs->ms[id]; | |
986a0757 HS |
666 | |
667 | #ifdef CONFIG_IP_VS_IPV6 | |
668 | if (cp->af == AF_INET6) | |
669 | len = sizeof(struct ip_vs_sync_v6); | |
670 | else | |
671 | #endif | |
672 | len = sizeof(struct ip_vs_sync_v4); | |
673 | ||
674 | if (cp->flags & IP_VS_CONN_F_SEQ_MASK) | |
675 | len += sizeof(struct ip_vs_sync_conn_options) + 2; | |
676 | ||
677 | if (cp->pe_data_len) | |
678 | len += cp->pe_data_len + 2; /* + Param hdr field */ | |
679 | if (pe_name_len) | |
680 | len += pe_name_len + 2; | |
681 | ||
682 | /* check if there is a space for this one */ | |
683 | pad = 0; | |
f73181c8 PNA |
684 | buff = ms->sync_buff; |
685 | if (buff) { | |
686 | m = buff->mesg; | |
687 | pad = (4 - (size_t) buff->head) & 3; | |
688 | /* Send buffer if it is for v0 */ | |
689 | if (buff->head + len + pad > buff->end || m->reserved) { | |
690 | sb_queue_tail(ipvs, ms); | |
691 | ms->sync_buff = NULL; | |
692 | buff = NULL; | |
986a0757 HS |
693 | pad = 0; |
694 | } | |
695 | } | |
696 | ||
f73181c8 | 697 | if (!buff) { |
e4ff6751 | 698 | buff = ip_vs_sync_buff_create(ipvs, len); |
f73181c8 | 699 | if (!buff) { |
ac69269a | 700 | spin_unlock_bh(&ipvs->sync_buff_lock); |
1e3e238e | 701 | pr_err("ip_vs_sync_buff_create failed.\n"); |
1da177e4 LT |
702 | return; |
703 | } | |
f73181c8 PNA |
704 | ms->sync_buff = buff; |
705 | m = buff->mesg; | |
1da177e4 LT |
706 | } |
707 | ||
f73181c8 PNA |
708 | p = buff->head; |
709 | buff->head += pad + len; | |
38561437 | 710 | m->size = htons(ntohs(m->size) + pad + len); |
986a0757 HS |
711 | /* Add ev. padding from prev. sync_conn */ |
712 | while (pad--) | |
713 | *(p++) = 0; | |
714 | ||
715 | s = (union ip_vs_sync_conn *)p; | |
716 | ||
717 | /* Set message type & copy members */ | |
718 | s->v4.type = (cp->af == AF_INET6 ? STYPE_F_INET6 : 0); | |
719 | s->v4.ver_size = htons(len & SVER_MASK); /* Version 0 */ | |
720 | s->v4.flags = htonl(cp->flags & ~IP_VS_CONN_F_HASHED); | |
721 | s->v4.state = htons(cp->state); | |
722 | s->v4.protocol = cp->protocol; | |
723 | s->v4.cport = cp->cport; | |
724 | s->v4.vport = cp->vport; | |
725 | s->v4.dport = cp->dport; | |
726 | s->v4.fwmark = htonl(cp->fwmark); | |
727 | s->v4.timeout = htonl(cp->timeout / HZ); | |
1da177e4 | 728 | m->nr_conns++; |
1da177e4 | 729 | |
986a0757 HS |
730 | #ifdef CONFIG_IP_VS_IPV6 |
731 | if (cp->af == AF_INET6) { | |
732 | p += sizeof(struct ip_vs_sync_v6); | |
4e3fd7a0 AD |
733 | s->v6.caddr = cp->caddr.in6; |
734 | s->v6.vaddr = cp->vaddr.in6; | |
735 | s->v6.daddr = cp->daddr.in6; | |
986a0757 HS |
736 | } else |
737 | #endif | |
738 | { | |
739 | p += sizeof(struct ip_vs_sync_v4); /* options ptr */ | |
740 | s->v4.caddr = cp->caddr.ip; | |
741 | s->v4.vaddr = cp->vaddr.ip; | |
742 | s->v4.daddr = cp->daddr.ip; | |
743 | } | |
744 | if (cp->flags & IP_VS_CONN_F_SEQ_MASK) { | |
745 | *(p++) = IPVS_OPT_SEQ_DATA; | |
746 | *(p++) = sizeof(struct ip_vs_sync_conn_options); | |
747 | hton_seq((struct ip_vs_seq *)p, &cp->in_seq); | |
748 | p += sizeof(struct ip_vs_seq); | |
749 | hton_seq((struct ip_vs_seq *)p, &cp->out_seq); | |
750 | p += sizeof(struct ip_vs_seq); | |
1da177e4 | 751 | } |
986a0757 HS |
752 | /* Handle pe data */ |
753 | if (cp->pe_data_len && cp->pe_data) { | |
754 | *(p++) = IPVS_OPT_PE_DATA; | |
755 | *(p++) = cp->pe_data_len; | |
756 | memcpy(p, cp->pe_data, cp->pe_data_len); | |
757 | p += cp->pe_data_len; | |
758 | if (pe_name_len) { | |
759 | /* Add PE_NAME */ | |
760 | *(p++) = IPVS_OPT_PE_NAME; | |
761 | *(p++) = pe_name_len; | |
762 | memcpy(p, cp->pe->name, pe_name_len); | |
763 | p += pe_name_len; | |
764 | } | |
765 | } | |
766 | ||
ac69269a | 767 | spin_unlock_bh(&ipvs->sync_buff_lock); |
1da177e4 | 768 | |
986a0757 | 769 | control: |
1da177e4 | 770 | /* synchronize its controller if it has */ |
986a0757 HS |
771 | cp = cp->control; |
772 | if (!cp) | |
773 | return; | |
749c42b6 JA |
774 | if (cp->flags & IP_VS_CONN_F_TEMPLATE) |
775 | pkts = atomic_add_return(1, &cp->in_pkts); | |
776 | else | |
777 | pkts = sysctl_sync_threshold(ipvs); | |
986a0757 | 778 | goto sloop; |
1da177e4 LT |
779 | } |
780 | ||
fe5e7a1e HS |
781 | /* |
782 | * fill_param used by version 1 | |
783 | */ | |
85999283 | 784 | static inline int |
19913dec | 785 | ip_vs_conn_fill_param_sync(struct netns_ipvs *ipvs, int af, union ip_vs_sync_conn *sc, |
fe5e7a1e HS |
786 | struct ip_vs_conn_param *p, |
787 | __u8 *pe_data, unsigned int pe_data_len, | |
788 | __u8 *pe_name, unsigned int pe_name_len) | |
85999283 | 789 | { |
fe5e7a1e HS |
790 | #ifdef CONFIG_IP_VS_IPV6 |
791 | if (af == AF_INET6) | |
19913dec | 792 | ip_vs_conn_fill_param(ipvs, af, sc->v6.protocol, |
fe5e7a1e HS |
793 | (const union nf_inet_addr *)&sc->v6.caddr, |
794 | sc->v6.cport, | |
795 | (const union nf_inet_addr *)&sc->v6.vaddr, | |
796 | sc->v6.vport, p); | |
797 | else | |
798 | #endif | |
19913dec | 799 | ip_vs_conn_fill_param(ipvs, af, sc->v4.protocol, |
fe5e7a1e HS |
800 | (const union nf_inet_addr *)&sc->v4.caddr, |
801 | sc->v4.cport, | |
802 | (const union nf_inet_addr *)&sc->v4.vaddr, | |
803 | sc->v4.vport, p); | |
804 | /* Handle pe data */ | |
805 | if (pe_data_len) { | |
806 | if (pe_name_len) { | |
807 | char buff[IP_VS_PENAME_MAXLEN+1]; | |
808 | ||
809 | memcpy(buff, pe_name, pe_name_len); | |
810 | buff[pe_name_len]=0; | |
811 | p->pe = __ip_vs_pe_getbyname(buff); | |
812 | if (!p->pe) { | |
f131315f HS |
813 | IP_VS_DBG(3, "BACKUP, no %s engine found/loaded\n", |
814 | buff); | |
fe5e7a1e HS |
815 | return 1; |
816 | } | |
817 | } else { | |
818 | IP_VS_ERR_RL("BACKUP, Invalid PE parameters\n"); | |
819 | return 1; | |
820 | } | |
821 | ||
6060c74a | 822 | p->pe_data = kmemdup(pe_data, pe_data_len, GFP_ATOMIC); |
fe5e7a1e | 823 | if (!p->pe_data) { |
982f4051 | 824 | module_put(p->pe->module); |
fe5e7a1e HS |
825 | return -ENOMEM; |
826 | } | |
fe5e7a1e HS |
827 | p->pe_data_len = pe_data_len; |
828 | } | |
85999283 SH |
829 | return 0; |
830 | } | |
1da177e4 LT |
831 | |
832 | /* | |
fe5e7a1e HS |
833 | * Connection Add / Update. |
834 | * Common for version 0 and 1 reception of backup sync_conns. | |
835 | * Param: ... | |
836 | * timeout is in sec. | |
1da177e4 | 837 | */ |
4f30665b | 838 | static void ip_vs_proc_conn(struct netns_ipvs *ipvs, struct ip_vs_conn_param *param, |
9bbac6a9 HS |
839 | unsigned int flags, unsigned int state, |
840 | unsigned int protocol, unsigned int type, | |
fe5e7a1e HS |
841 | const union nf_inet_addr *daddr, __be16 dport, |
842 | unsigned long timeout, __u32 fwmark, | |
9bbac6a9 | 843 | struct ip_vs_sync_conn_options *opt) |
fe5e7a1e HS |
844 | { |
845 | struct ip_vs_dest *dest; | |
846 | struct ip_vs_conn *cp; | |
847 | ||
d752c364 | 848 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) { |
fe5e7a1e | 849 | cp = ip_vs_conn_in_get(param); |
d752c364 MRL |
850 | if (cp && ((cp->dport != dport) || |
851 | !ip_vs_addr_equal(cp->daf, &cp->daddr, daddr))) { | |
852 | if (!(flags & IP_VS_CONN_F_INACTIVE)) { | |
853 | ip_vs_conn_expire_now(cp); | |
854 | __ip_vs_conn_put(cp); | |
855 | cp = NULL; | |
856 | } else { | |
857 | /* This is the expiration message for the | |
858 | * connection that was already replaced, so we | |
859 | * just ignore it. | |
860 | */ | |
861 | __ip_vs_conn_put(cp); | |
862 | kfree(param->pe_data); | |
863 | return; | |
864 | } | |
865 | } | |
866 | } else { | |
fe5e7a1e | 867 | cp = ip_vs_ct_in_get(param); |
d752c364 | 868 | } |
fe5e7a1e | 869 | |
cdcc5e90 JA |
870 | if (cp) { |
871 | /* Free pe_data */ | |
fe5e7a1e | 872 | kfree(param->pe_data); |
cdcc5e90 JA |
873 | |
874 | dest = cp->dest; | |
ac69269a | 875 | spin_lock_bh(&cp->lock); |
cdcc5e90 JA |
876 | if ((cp->flags ^ flags) & IP_VS_CONN_F_INACTIVE && |
877 | !(flags & IP_VS_CONN_F_TEMPLATE) && dest) { | |
878 | if (flags & IP_VS_CONN_F_INACTIVE) { | |
879 | atomic_dec(&dest->activeconns); | |
880 | atomic_inc(&dest->inactconns); | |
881 | } else { | |
882 | atomic_inc(&dest->activeconns); | |
883 | atomic_dec(&dest->inactconns); | |
884 | } | |
885 | } | |
886 | flags &= IP_VS_CONN_F_BACKUP_UPD_MASK; | |
887 | flags |= cp->flags & ~IP_VS_CONN_F_BACKUP_UPD_MASK; | |
888 | cp->flags = flags; | |
ac69269a | 889 | spin_unlock_bh(&cp->lock); |
413c2d04 JA |
890 | if (!dest) |
891 | ip_vs_try_bind_dest(cp); | |
cdcc5e90 | 892 | } else { |
fe5e7a1e HS |
893 | /* |
894 | * Find the appropriate destination for the connection. | |
895 | * If it is not found the connection will remain unbound | |
896 | * but still handled. | |
897 | */ | |
413c2d04 | 898 | rcu_read_lock(); |
655eef10 AG |
899 | /* This function is only invoked by the synchronization |
900 | * code. We do not currently support heterogeneous pools | |
901 | * with synchronization, so we can make the assumption that | |
902 | * the svc_af is the same as the dest_af | |
903 | */ | |
dc2add6f | 904 | dest = ip_vs_find_dest(ipvs, type, type, daddr, dport, |
655eef10 AG |
905 | param->vaddr, param->vport, protocol, |
906 | fwmark, flags); | |
fe5e7a1e | 907 | |
ba38528a AG |
908 | cp = ip_vs_conn_new(param, type, daddr, dport, flags, dest, |
909 | fwmark); | |
413c2d04 | 910 | rcu_read_unlock(); |
fe5e7a1e | 911 | if (!cp) { |
b734427a | 912 | kfree(param->pe_data); |
fe5e7a1e HS |
913 | IP_VS_DBG(2, "BACKUP, add new conn. failed\n"); |
914 | return; | |
915 | } | |
528c943f JA |
916 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) |
917 | kfree(param->pe_data); | |
fe5e7a1e HS |
918 | } |
919 | ||
920 | if (opt) | |
921 | memcpy(&cp->in_seq, opt, sizeof(*opt)); | |
59e0350e | 922 | atomic_set(&cp->in_pkts, sysctl_sync_threshold(ipvs)); |
fe5e7a1e HS |
923 | cp->state = state; |
924 | cp->old_state = cp->state; | |
925 | /* | |
926 | * For Ver 0 messages style | |
927 | * - Not possible to recover the right timeout for templates | |
928 | * - can not find the right fwmark | |
929 | * virtual service. If needed, we can do it for | |
930 | * non-fwmark persistent services. | |
931 | * Ver 1 messages style. | |
932 | * - No problem. | |
933 | */ | |
934 | if (timeout) { | |
935 | if (timeout > MAX_SCHEDULE_TIMEOUT / HZ) | |
936 | timeout = MAX_SCHEDULE_TIMEOUT / HZ; | |
937 | cp->timeout = timeout*HZ; | |
9bbac6a9 HS |
938 | } else { |
939 | struct ip_vs_proto_data *pd; | |
940 | ||
18d6ade6 | 941 | pd = ip_vs_proto_data_get(ipvs, protocol); |
9bbac6a9 HS |
942 | if (!(flags & IP_VS_CONN_F_TEMPLATE) && pd && pd->timeout_table) |
943 | cp->timeout = pd->timeout_table[state]; | |
944 | else | |
945 | cp->timeout = (3*60*HZ); | |
946 | } | |
fe5e7a1e HS |
947 | ip_vs_conn_put(cp); |
948 | } | |
949 | ||
950 | /* | |
951 | * Process received multicast message for Version 0 | |
952 | */ | |
19913dec | 953 | static void ip_vs_process_message_v0(struct netns_ipvs *ipvs, const char *buffer, |
9bbac6a9 | 954 | const size_t buflen) |
1da177e4 | 955 | { |
986a0757 | 956 | struct ip_vs_sync_mesg_v0 *m = (struct ip_vs_sync_mesg_v0 *)buffer; |
2981bc9a | 957 | struct ip_vs_sync_conn_v0 *s; |
1da177e4 | 958 | struct ip_vs_sync_conn_options *opt; |
5c81833c | 959 | struct ip_vs_protocol *pp; |
f11017ec | 960 | struct ip_vs_conn_param param; |
1da177e4 LT |
961 | char *p; |
962 | int i; | |
963 | ||
986a0757 | 964 | p = (char *)buffer + sizeof(struct ip_vs_sync_mesg_v0); |
1da177e4 | 965 | for (i=0; i<m->nr_conns; i++) { |
95c96174 | 966 | unsigned int flags, state; |
87375ab4 | 967 | |
2ad17def | 968 | if (p + SIMPLE_CONN_SIZE > buffer+buflen) { |
fe5e7a1e | 969 | IP_VS_ERR_RL("BACKUP v0, bogus conn\n"); |
2ad17def JA |
970 | return; |
971 | } | |
2981bc9a | 972 | s = (struct ip_vs_sync_conn_v0 *) p; |
7a4fbb1f | 973 | flags = ntohs(s->flags) | IP_VS_CONN_F_SYNC; |
2ad17def JA |
974 | flags &= ~IP_VS_CONN_F_HASHED; |
975 | if (flags & IP_VS_CONN_F_SEQ_MASK) { | |
976 | opt = (struct ip_vs_sync_conn_options *)&s[1]; | |
977 | p += FULL_CONN_SIZE; | |
978 | if (p > buffer+buflen) { | |
fe5e7a1e | 979 | IP_VS_ERR_RL("BACKUP v0, Dropping buffer bogus conn options\n"); |
2ad17def JA |
980 | return; |
981 | } | |
982 | } else { | |
983 | opt = NULL; | |
984 | p += SIMPLE_CONN_SIZE; | |
985 | } | |
986 | ||
b209639e | 987 | state = ntohs(s->state); |
2ad17def JA |
988 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) { |
989 | pp = ip_vs_proto_get(s->protocol); | |
990 | if (!pp) { | |
fe5e7a1e | 991 | IP_VS_DBG(2, "BACKUP v0, Unsupported protocol %u\n", |
2ad17def JA |
992 | s->protocol); |
993 | continue; | |
994 | } | |
995 | if (state >= pp->num_states) { | |
fe5e7a1e | 996 | IP_VS_DBG(2, "BACKUP v0, Invalid %s state %u\n", |
2ad17def JA |
997 | pp->name, state); |
998 | continue; | |
999 | } | |
1000 | } else { | |
1001 | /* protocol in templates is not used for state/timeout */ | |
2ad17def | 1002 | if (state > 0) { |
fe5e7a1e | 1003 | IP_VS_DBG(2, "BACKUP v0, Invalid template state %u\n", |
2ad17def JA |
1004 | state); |
1005 | state = 0; | |
1006 | } | |
1007 | } | |
1008 | ||
19913dec | 1009 | ip_vs_conn_fill_param(ipvs, AF_INET, s->protocol, |
fe5e7a1e HS |
1010 | (const union nf_inet_addr *)&s->caddr, |
1011 | s->cport, | |
1012 | (const union nf_inet_addr *)&s->vaddr, | |
1013 | s->vport, ¶m); | |
1014 | ||
1015 | /* Send timeout as Zero */ | |
4f30665b | 1016 | ip_vs_proc_conn(ipvs, ¶m, flags, state, s->protocol, AF_INET, |
fe5e7a1e | 1017 | (union nf_inet_addr *)&s->daddr, s->dport, |
9bbac6a9 | 1018 | 0, 0, opt); |
fe5e7a1e HS |
1019 | } |
1020 | } | |
1021 | ||
1022 | /* | |
1023 | * Handle options | |
1024 | */ | |
1025 | static inline int ip_vs_proc_seqopt(__u8 *p, unsigned int plen, | |
1026 | __u32 *opt_flags, | |
1027 | struct ip_vs_sync_conn_options *opt) | |
1028 | { | |
1029 | struct ip_vs_sync_conn_options *topt; | |
1030 | ||
1031 | topt = (struct ip_vs_sync_conn_options *)p; | |
1032 | ||
1033 | if (plen != sizeof(struct ip_vs_sync_conn_options)) { | |
1034 | IP_VS_DBG(2, "BACKUP, bogus conn options length\n"); | |
1035 | return -EINVAL; | |
1036 | } | |
1037 | if (*opt_flags & IPVS_OPT_F_SEQ_DATA) { | |
1038 | IP_VS_DBG(2, "BACKUP, conn options found twice\n"); | |
1039 | return -EINVAL; | |
1040 | } | |
1041 | ntoh_seq(&topt->in_seq, &opt->in_seq); | |
1042 | ntoh_seq(&topt->out_seq, &opt->out_seq); | |
1043 | *opt_flags |= IPVS_OPT_F_SEQ_DATA; | |
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static int ip_vs_proc_str(__u8 *p, unsigned int plen, unsigned int *data_len, | |
1048 | __u8 **data, unsigned int maxlen, | |
1049 | __u32 *opt_flags, __u32 flag) | |
1050 | { | |
1051 | if (plen > maxlen) { | |
1052 | IP_VS_DBG(2, "BACKUP, bogus par.data len > %d\n", maxlen); | |
1053 | return -EINVAL; | |
1054 | } | |
1055 | if (*opt_flags & flag) { | |
1056 | IP_VS_DBG(2, "BACKUP, Par.data found twice 0x%x\n", flag); | |
1057 | return -EINVAL; | |
1058 | } | |
1059 | *data_len = plen; | |
1060 | *data = p; | |
1061 | *opt_flags |= flag; | |
1062 | return 0; | |
1063 | } | |
1064 | /* | |
1065 | * Process a Version 1 sync. connection | |
1066 | */ | |
1fc12004 | 1067 | static inline int ip_vs_proc_sync_conn(struct netns_ipvs *ipvs, __u8 *p, __u8 *msg_end) |
fe5e7a1e HS |
1068 | { |
1069 | struct ip_vs_sync_conn_options opt; | |
1070 | union ip_vs_sync_conn *s; | |
1071 | struct ip_vs_protocol *pp; | |
1072 | struct ip_vs_conn_param param; | |
1073 | __u32 flags; | |
1074 | unsigned int af, state, pe_data_len=0, pe_name_len=0; | |
1075 | __u8 *pe_data=NULL, *pe_name=NULL; | |
1076 | __u32 opt_flags=0; | |
1077 | int retc=0; | |
1078 | ||
1079 | s = (union ip_vs_sync_conn *) p; | |
1080 | ||
1081 | if (s->v6.type & STYPE_F_INET6) { | |
1082 | #ifdef CONFIG_IP_VS_IPV6 | |
1083 | af = AF_INET6; | |
1084 | p += sizeof(struct ip_vs_sync_v6); | |
1085 | #else | |
1086 | IP_VS_DBG(3,"BACKUP, IPv6 msg received, and IPVS is not compiled for IPv6\n"); | |
1087 | retc = 10; | |
1088 | goto out; | |
1089 | #endif | |
1090 | } else if (!s->v4.type) { | |
1091 | af = AF_INET; | |
1092 | p += sizeof(struct ip_vs_sync_v4); | |
1093 | } else { | |
1094 | return -10; | |
1095 | } | |
1096 | if (p > msg_end) | |
1097 | return -20; | |
1098 | ||
1099 | /* Process optional params check Type & Len. */ | |
1100 | while (p < msg_end) { | |
1101 | int ptype; | |
1102 | int plen; | |
1103 | ||
1104 | if (p+2 > msg_end) | |
1105 | return -30; | |
1106 | ptype = *(p++); | |
1107 | plen = *(p++); | |
1108 | ||
1109 | if (!plen || ((p + plen) > msg_end)) | |
1110 | return -40; | |
1111 | /* Handle seq option p = param data */ | |
1112 | switch (ptype & ~IPVS_OPT_F_PARAM) { | |
1113 | case IPVS_OPT_SEQ_DATA: | |
1114 | if (ip_vs_proc_seqopt(p, plen, &opt_flags, &opt)) | |
1115 | return -50; | |
1116 | break; | |
1117 | ||
1118 | case IPVS_OPT_PE_DATA: | |
1119 | if (ip_vs_proc_str(p, plen, &pe_data_len, &pe_data, | |
1120 | IP_VS_PEDATA_MAXLEN, &opt_flags, | |
1121 | IPVS_OPT_F_PE_DATA)) | |
1122 | return -60; | |
1123 | break; | |
1124 | ||
1125 | case IPVS_OPT_PE_NAME: | |
1126 | if (ip_vs_proc_str(p, plen,&pe_name_len, &pe_name, | |
1127 | IP_VS_PENAME_MAXLEN, &opt_flags, | |
1128 | IPVS_OPT_F_PE_NAME)) | |
1129 | return -70; | |
1130 | break; | |
1131 | ||
1132 | default: | |
1133 | /* Param data mandatory ? */ | |
1134 | if (!(ptype & IPVS_OPT_F_PARAM)) { | |
1135 | IP_VS_DBG(3, "BACKUP, Unknown mandatory param %d found\n", | |
1136 | ptype & ~IPVS_OPT_F_PARAM); | |
1137 | retc = 20; | |
1138 | goto out; | |
1139 | } | |
f11017ec | 1140 | } |
fe5e7a1e HS |
1141 | p += plen; /* Next option */ |
1142 | } | |
1143 | ||
1144 | /* Get flags and Mask off unsupported */ | |
1145 | flags = ntohl(s->v4.flags) & IP_VS_CONN_F_BACKUP_MASK; | |
1146 | flags |= IP_VS_CONN_F_SYNC; | |
1147 | state = ntohs(s->v4.state); | |
1148 | ||
1149 | if (!(flags & IP_VS_CONN_F_TEMPLATE)) { | |
1150 | pp = ip_vs_proto_get(s->v4.protocol); | |
1151 | if (!pp) { | |
1152 | IP_VS_DBG(3,"BACKUP, Unsupported protocol %u\n", | |
1153 | s->v4.protocol); | |
1154 | retc = 30; | |
1155 | goto out; | |
1156 | } | |
1157 | if (state >= pp->num_states) { | |
1158 | IP_VS_DBG(3, "BACKUP, Invalid %s state %u\n", | |
1159 | pp->name, state); | |
1160 | retc = 40; | |
1161 | goto out; | |
1162 | } | |
1163 | } else { | |
1164 | /* protocol in templates is not used for state/timeout */ | |
fe5e7a1e HS |
1165 | if (state > 0) { |
1166 | IP_VS_DBG(3, "BACKUP, Invalid template state %u\n", | |
1167 | state); | |
1168 | state = 0; | |
1169 | } | |
1170 | } | |
4f30665b | 1171 | if (ip_vs_conn_fill_param_sync(ipvs, af, s, ¶m, pe_data, |
6e67e586 | 1172 | pe_data_len, pe_name, pe_name_len)) { |
fe5e7a1e HS |
1173 | retc = 50; |
1174 | goto out; | |
1175 | } | |
1176 | /* If only IPv4, just silent skip IPv6 */ | |
1177 | if (af == AF_INET) | |
4f30665b | 1178 | ip_vs_proc_conn(ipvs, ¶m, flags, state, s->v4.protocol, af, |
fe5e7a1e HS |
1179 | (union nf_inet_addr *)&s->v4.daddr, s->v4.dport, |
1180 | ntohl(s->v4.timeout), ntohl(s->v4.fwmark), | |
9bbac6a9 HS |
1181 | (opt_flags & IPVS_OPT_F_SEQ_DATA ? &opt : NULL) |
1182 | ); | |
fe5e7a1e HS |
1183 | #ifdef CONFIG_IP_VS_IPV6 |
1184 | else | |
4f30665b | 1185 | ip_vs_proc_conn(ipvs, ¶m, flags, state, s->v6.protocol, af, |
fe5e7a1e HS |
1186 | (union nf_inet_addr *)&s->v6.daddr, s->v6.dport, |
1187 | ntohl(s->v6.timeout), ntohl(s->v6.fwmark), | |
9bbac6a9 HS |
1188 | (opt_flags & IPVS_OPT_F_SEQ_DATA ? &opt : NULL) |
1189 | ); | |
fe5e7a1e | 1190 | #endif |
528c943f | 1191 | ip_vs_pe_put(param.pe); |
fe5e7a1e HS |
1192 | return 0; |
1193 | /* Error exit */ | |
1194 | out: | |
1195 | IP_VS_DBG(2, "BACKUP, Single msg dropped err:%d\n", retc); | |
1196 | return retc; | |
1197 | ||
1198 | } | |
1199 | /* | |
1200 | * Process received multicast message and create the corresponding | |
1201 | * ip_vs_conn entries. | |
1202 | * Handles Version 0 & 1 | |
1203 | */ | |
7d537f3a | 1204 | static void ip_vs_process_message(struct netns_ipvs *ipvs, __u8 *buffer, |
9bbac6a9 | 1205 | const size_t buflen) |
fe5e7a1e | 1206 | { |
986a0757 | 1207 | struct ip_vs_sync_mesg *m2 = (struct ip_vs_sync_mesg *)buffer; |
fe5e7a1e | 1208 | __u8 *p, *msg_end; |
986a0757 | 1209 | int i, nr_conns; |
fe5e7a1e | 1210 | |
986a0757 | 1211 | if (buflen < sizeof(struct ip_vs_sync_mesg_v0)) { |
fe5e7a1e HS |
1212 | IP_VS_DBG(2, "BACKUP, message header too short\n"); |
1213 | return; | |
1214 | } | |
fe5e7a1e | 1215 | |
38561437 | 1216 | if (buflen != ntohs(m2->size)) { |
fe5e7a1e HS |
1217 | IP_VS_DBG(2, "BACKUP, bogus message size\n"); |
1218 | return; | |
1219 | } | |
1220 | /* SyncID sanity check */ | |
e4ff6751 | 1221 | if (ipvs->bcfg.syncid != 0 && m2->syncid != ipvs->bcfg.syncid) { |
fe5e7a1e HS |
1222 | IP_VS_DBG(7, "BACKUP, Ignoring syncid = %d\n", m2->syncid); |
1223 | return; | |
1224 | } | |
1225 | /* Handle version 1 message */ | |
1226 | if ((m2->version == SYNC_PROTO_VER) && (m2->reserved == 0) | |
1227 | && (m2->spare == 0)) { | |
1228 | ||
986a0757 | 1229 | msg_end = buffer + sizeof(struct ip_vs_sync_mesg); |
fe5e7a1e HS |
1230 | nr_conns = m2->nr_conns; |
1231 | ||
1232 | for (i=0; i<nr_conns; i++) { | |
1233 | union ip_vs_sync_conn *s; | |
95c96174 | 1234 | unsigned int size; |
fe5e7a1e HS |
1235 | int retc; |
1236 | ||
1237 | p = msg_end; | |
1238 | if (p + sizeof(s->v4) > buffer+buflen) { | |
1239 | IP_VS_ERR_RL("BACKUP, Dropping buffer, to small\n"); | |
1240 | return; | |
b209639e | 1241 | } |
fe5e7a1e HS |
1242 | s = (union ip_vs_sync_conn *)p; |
1243 | size = ntohs(s->v4.ver_size) & SVER_MASK; | |
1244 | msg_end = p + size; | |
1245 | /* Basic sanity checks */ | |
1246 | if (msg_end > buffer+buflen) { | |
1247 | IP_VS_ERR_RL("BACKUP, Dropping buffer, msg > buffer\n"); | |
1da177e4 LT |
1248 | return; |
1249 | } | |
fe5e7a1e HS |
1250 | if (ntohs(s->v4.ver_size) >> SVER_SHIFT) { |
1251 | IP_VS_ERR_RL("BACKUP, Dropping buffer, Unknown version %d\n", | |
1252 | ntohs(s->v4.ver_size) >> SVER_SHIFT); | |
1253 | return; | |
b209639e | 1254 | } |
fe5e7a1e | 1255 | /* Process a single sync_conn */ |
1fc12004 | 1256 | retc = ip_vs_proc_sync_conn(ipvs, p, msg_end); |
9bbac6a9 | 1257 | if (retc < 0) { |
fe5e7a1e HS |
1258 | IP_VS_ERR_RL("BACKUP, Dropping buffer, Err: %d in decoding\n", |
1259 | retc); | |
1260 | return; | |
2906f66a | 1261 | } |
fe5e7a1e HS |
1262 | /* Make sure we have 32 bit alignment */ |
1263 | msg_end = p + ((size + 3) & ~3); | |
b209639e | 1264 | } |
fe5e7a1e HS |
1265 | } else { |
1266 | /* Old type of message */ | |
19913dec | 1267 | ip_vs_process_message_v0(ipvs, buffer, buflen); |
fe5e7a1e | 1268 | return; |
1da177e4 LT |
1269 | } |
1270 | } | |
1271 | ||
1272 | ||
1c003b15 PNA |
1273 | /* |
1274 | * Setup sndbuf (mode=1) or rcvbuf (mode=0) | |
1275 | */ | |
1276 | static void set_sock_size(struct sock *sk, int mode, int val) | |
1277 | { | |
1278 | /* setsockopt(sock, SOL_SOCKET, SO_SNDBUF, &val, sizeof(val)); */ | |
1279 | /* setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)); */ | |
1280 | lock_sock(sk); | |
1281 | if (mode) { | |
1282 | val = clamp_t(int, val, (SOCK_MIN_SNDBUF + 1) / 2, | |
1283 | sysctl_wmem_max); | |
1284 | sk->sk_sndbuf = val * 2; | |
1285 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; | |
1286 | } else { | |
1287 | val = clamp_t(int, val, (SOCK_MIN_RCVBUF + 1) / 2, | |
1288 | sysctl_rmem_max); | |
1289 | sk->sk_rcvbuf = val * 2; | |
1290 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; | |
1291 | } | |
1292 | release_sock(sk); | |
1293 | } | |
1294 | ||
1da177e4 LT |
1295 | /* |
1296 | * Setup loopback of outgoing multicasts on a sending socket | |
1297 | */ | |
1298 | static void set_mcast_loop(struct sock *sk, u_char loop) | |
1299 | { | |
1300 | struct inet_sock *inet = inet_sk(sk); | |
1301 | ||
1302 | /* setsockopt(sock, SOL_IP, IP_MULTICAST_LOOP, &loop, sizeof(loop)); */ | |
1303 | lock_sock(sk); | |
1304 | inet->mc_loop = loop ? 1 : 0; | |
d3328817 JA |
1305 | #ifdef CONFIG_IP_VS_IPV6 |
1306 | if (sk->sk_family == AF_INET6) { | |
1307 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1308 | ||
1309 | /* IPV6_MULTICAST_LOOP */ | |
1310 | np->mc_loop = loop ? 1 : 0; | |
1311 | } | |
1312 | #endif | |
1da177e4 LT |
1313 | release_sock(sk); |
1314 | } | |
1315 | ||
1316 | /* | |
1317 | * Specify TTL for outgoing multicasts on a sending socket | |
1318 | */ | |
1319 | static void set_mcast_ttl(struct sock *sk, u_char ttl) | |
1320 | { | |
1321 | struct inet_sock *inet = inet_sk(sk); | |
1322 | ||
1323 | /* setsockopt(sock, SOL_IP, IP_MULTICAST_TTL, &ttl, sizeof(ttl)); */ | |
1324 | lock_sock(sk); | |
1325 | inet->mc_ttl = ttl; | |
d3328817 JA |
1326 | #ifdef CONFIG_IP_VS_IPV6 |
1327 | if (sk->sk_family == AF_INET6) { | |
1328 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1329 | ||
1330 | /* IPV6_MULTICAST_HOPS */ | |
1331 | np->mcast_hops = ttl; | |
1332 | } | |
1333 | #endif | |
1da177e4 LT |
1334 | release_sock(sk); |
1335 | } | |
1336 | ||
e4ff6751 JA |
1337 | /* Control fragmentation of messages */ |
1338 | static void set_mcast_pmtudisc(struct sock *sk, int val) | |
1339 | { | |
1340 | struct inet_sock *inet = inet_sk(sk); | |
1341 | ||
1342 | /* setsockopt(sock, SOL_IP, IP_MTU_DISCOVER, &val, sizeof(val)); */ | |
1343 | lock_sock(sk); | |
1344 | inet->pmtudisc = val; | |
d3328817 JA |
1345 | #ifdef CONFIG_IP_VS_IPV6 |
1346 | if (sk->sk_family == AF_INET6) { | |
1347 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1348 | ||
1349 | /* IPV6_MTU_DISCOVER */ | |
1350 | np->pmtudisc = val; | |
1351 | } | |
1352 | #endif | |
e4ff6751 JA |
1353 | release_sock(sk); |
1354 | } | |
1355 | ||
1da177e4 LT |
1356 | /* |
1357 | * Specifiy default interface for outgoing multicasts | |
1358 | */ | |
1359 | static int set_mcast_if(struct sock *sk, char *ifname) | |
1360 | { | |
1361 | struct net_device *dev; | |
1362 | struct inet_sock *inet = inet_sk(sk); | |
f131315f | 1363 | struct net *net = sock_net(sk); |
1da177e4 | 1364 | |
f131315f HS |
1365 | dev = __dev_get_by_name(net, ifname); |
1366 | if (!dev) | |
1da177e4 LT |
1367 | return -ENODEV; |
1368 | ||
1369 | if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if) | |
1370 | return -EINVAL; | |
1371 | ||
1372 | lock_sock(sk); | |
1373 | inet->mc_index = dev->ifindex; | |
1374 | /* inet->mc_addr = 0; */ | |
d3328817 JA |
1375 | #ifdef CONFIG_IP_VS_IPV6 |
1376 | if (sk->sk_family == AF_INET6) { | |
1377 | struct ipv6_pinfo *np = inet6_sk(sk); | |
1378 | ||
1379 | /* IPV6_MULTICAST_IF */ | |
1380 | np->mcast_oif = dev->ifindex; | |
1381 | } | |
1382 | #endif | |
1da177e4 LT |
1383 | release_sock(sk); |
1384 | ||
1385 | return 0; | |
1386 | } | |
1387 | ||
1388 | ||
1da177e4 LT |
1389 | /* |
1390 | * Join a multicast group. | |
1391 | * the group is specified by a class D multicast address 224.0.0.0/8 | |
1392 | * in the in_addr structure passed in as a parameter. | |
1393 | */ | |
1394 | static int | |
1395 | join_mcast_group(struct sock *sk, struct in_addr *addr, char *ifname) | |
1396 | { | |
f131315f | 1397 | struct net *net = sock_net(sk); |
1da177e4 LT |
1398 | struct ip_mreqn mreq; |
1399 | struct net_device *dev; | |
1400 | int ret; | |
1401 | ||
1402 | memset(&mreq, 0, sizeof(mreq)); | |
1403 | memcpy(&mreq.imr_multiaddr, addr, sizeof(struct in_addr)); | |
1404 | ||
f131315f HS |
1405 | dev = __dev_get_by_name(net, ifname); |
1406 | if (!dev) | |
1da177e4 LT |
1407 | return -ENODEV; |
1408 | if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if) | |
1409 | return -EINVAL; | |
1410 | ||
1411 | mreq.imr_ifindex = dev->ifindex; | |
1412 | ||
1413 | lock_sock(sk); | |
1414 | ret = ip_mc_join_group(sk, &mreq); | |
1415 | release_sock(sk); | |
1416 | ||
1417 | return ret; | |
1418 | } | |
1419 | ||
d3328817 JA |
1420 | #ifdef CONFIG_IP_VS_IPV6 |
1421 | static int join_mcast_group6(struct sock *sk, struct in6_addr *addr, | |
1422 | char *ifname) | |
1423 | { | |
1424 | struct net *net = sock_net(sk); | |
1425 | struct net_device *dev; | |
1426 | int ret; | |
1427 | ||
1428 | dev = __dev_get_by_name(net, ifname); | |
1429 | if (!dev) | |
1430 | return -ENODEV; | |
1431 | if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if) | |
1432 | return -EINVAL; | |
1433 | ||
1434 | lock_sock(sk); | |
1435 | ret = ipv6_sock_mc_join(sk, dev->ifindex, addr); | |
1436 | release_sock(sk); | |
1437 | ||
1438 | return ret; | |
1439 | } | |
1440 | #endif | |
1da177e4 LT |
1441 | |
1442 | static int bind_mcastif_addr(struct socket *sock, char *ifname) | |
1443 | { | |
f131315f | 1444 | struct net *net = sock_net(sock->sk); |
1da177e4 | 1445 | struct net_device *dev; |
a61ced5d | 1446 | __be32 addr; |
1da177e4 LT |
1447 | struct sockaddr_in sin; |
1448 | ||
f131315f HS |
1449 | dev = __dev_get_by_name(net, ifname); |
1450 | if (!dev) | |
1da177e4 LT |
1451 | return -ENODEV; |
1452 | ||
1453 | addr = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE); | |
1454 | if (!addr) | |
1e3e238e HE |
1455 | pr_err("You probably need to specify IP address on " |
1456 | "multicast interface.\n"); | |
1da177e4 | 1457 | |
14d5e834 HH |
1458 | IP_VS_DBG(7, "binding socket with (%s) %pI4\n", |
1459 | ifname, &addr); | |
1da177e4 LT |
1460 | |
1461 | /* Now bind the socket with the address of multicast interface */ | |
1462 | sin.sin_family = AF_INET; | |
1463 | sin.sin_addr.s_addr = addr; | |
1464 | sin.sin_port = 0; | |
1465 | ||
1466 | return sock->ops->bind(sock, (struct sockaddr*)&sin, sizeof(sin)); | |
1467 | } | |
1468 | ||
d3328817 JA |
1469 | static void get_mcast_sockaddr(union ipvs_sockaddr *sa, int *salen, |
1470 | struct ipvs_sync_daemon_cfg *c, int id) | |
1471 | { | |
1472 | if (AF_INET6 == c->mcast_af) { | |
1473 | sa->in6 = (struct sockaddr_in6) { | |
1474 | .sin6_family = AF_INET6, | |
1475 | .sin6_port = htons(c->mcast_port + id), | |
1476 | }; | |
1477 | sa->in6.sin6_addr = c->mcast_group.in6; | |
1478 | *salen = sizeof(sa->in6); | |
1479 | } else { | |
1480 | sa->in = (struct sockaddr_in) { | |
1481 | .sin_family = AF_INET, | |
1482 | .sin_port = htons(c->mcast_port + id), | |
1483 | }; | |
1484 | sa->in.sin_addr = c->mcast_group.in; | |
1485 | *salen = sizeof(sa->in); | |
1486 | } | |
1487 | } | |
1488 | ||
1da177e4 LT |
1489 | /* |
1490 | * Set up sending multicast socket over UDP | |
1491 | */ | |
68c76b6a | 1492 | static struct socket *make_send_sock(struct netns_ipvs *ipvs, int id) |
1da177e4 | 1493 | { |
f73181c8 | 1494 | /* multicast addr */ |
d3328817 | 1495 | union ipvs_sockaddr mcast_addr; |
1da177e4 | 1496 | struct socket *sock; |
d3328817 | 1497 | int result, salen; |
1da177e4 | 1498 | |
26abe143 | 1499 | /* First create a socket */ |
68c76b6a | 1500 | result = sock_create_kern(ipvs->net, ipvs->mcfg.mcast_af, SOCK_DGRAM, |
d3328817 | 1501 | IPPROTO_UDP, &sock); |
e6dd731c | 1502 | if (result < 0) { |
1e3e238e | 1503 | pr_err("Error during creation of socket; terminating\n"); |
e6dd731c | 1504 | return ERR_PTR(result); |
1da177e4 | 1505 | } |
e4ff6751 | 1506 | result = set_mcast_if(sock->sk, ipvs->mcfg.mcast_ifn); |
e6dd731c | 1507 | if (result < 0) { |
1e3e238e | 1508 | pr_err("Error setting outbound mcast interface\n"); |
1da177e4 LT |
1509 | goto error; |
1510 | } | |
1511 | ||
1512 | set_mcast_loop(sock->sk, 0); | |
d3328817 | 1513 | set_mcast_ttl(sock->sk, ipvs->mcfg.mcast_ttl); |
e4ff6751 JA |
1514 | /* Allow fragmentation if MTU changes */ |
1515 | set_mcast_pmtudisc(sock->sk, IP_PMTUDISC_DONT); | |
1c003b15 PNA |
1516 | result = sysctl_sync_sock_size(ipvs); |
1517 | if (result > 0) | |
1518 | set_sock_size(sock->sk, 1, result); | |
1da177e4 | 1519 | |
d3328817 JA |
1520 | if (AF_INET == ipvs->mcfg.mcast_af) |
1521 | result = bind_mcastif_addr(sock, ipvs->mcfg.mcast_ifn); | |
1522 | else | |
1523 | result = 0; | |
e6dd731c | 1524 | if (result < 0) { |
1e3e238e | 1525 | pr_err("Error binding address of the mcast interface\n"); |
1da177e4 LT |
1526 | goto error; |
1527 | } | |
1528 | ||
d3328817 | 1529 | get_mcast_sockaddr(&mcast_addr, &salen, &ipvs->mcfg, id); |
e6dd731c | 1530 | result = sock->ops->connect(sock, (struct sockaddr *) &mcast_addr, |
d3328817 | 1531 | salen, 0); |
e6dd731c | 1532 | if (result < 0) { |
1e3e238e | 1533 | pr_err("Error connecting to the multicast addr\n"); |
1da177e4 LT |
1534 | goto error; |
1535 | } | |
1536 | ||
1537 | return sock; | |
1538 | ||
1ae132b0 | 1539 | error: |
26abe143 | 1540 | sock_release(sock); |
e6dd731c | 1541 | return ERR_PTR(result); |
1da177e4 LT |
1542 | } |
1543 | ||
1544 | ||
1545 | /* | |
1546 | * Set up receiving multicast socket over UDP | |
1547 | */ | |
3777ed68 QA |
1548 | static struct socket *make_receive_sock(struct netns_ipvs *ipvs, int id, |
1549 | int ifindex) | |
1da177e4 | 1550 | { |
f73181c8 | 1551 | /* multicast addr */ |
d3328817 | 1552 | union ipvs_sockaddr mcast_addr; |
1da177e4 | 1553 | struct socket *sock; |
d3328817 | 1554 | int result, salen; |
1da177e4 LT |
1555 | |
1556 | /* First create a socket */ | |
fd124e2f | 1557 | result = sock_create_kern(ipvs->net, ipvs->bcfg.mcast_af, SOCK_DGRAM, |
d3328817 | 1558 | IPPROTO_UDP, &sock); |
e6dd731c | 1559 | if (result < 0) { |
1e3e238e | 1560 | pr_err("Error during creation of socket; terminating\n"); |
e6dd731c | 1561 | return ERR_PTR(result); |
1da177e4 | 1562 | } |
1da177e4 | 1563 | /* it is equivalent to the REUSEADDR option in user-space */ |
4a17fd52 | 1564 | sock->sk->sk_reuse = SK_CAN_REUSE; |
1c003b15 PNA |
1565 | result = sysctl_sync_sock_size(ipvs); |
1566 | if (result > 0) | |
1567 | set_sock_size(sock->sk, 0, result); | |
1da177e4 | 1568 | |
d3328817 | 1569 | get_mcast_sockaddr(&mcast_addr, &salen, &ipvs->bcfg, id); |
3777ed68 | 1570 | sock->sk->sk_bound_dev_if = ifindex; |
d3328817 | 1571 | result = sock->ops->bind(sock, (struct sockaddr *)&mcast_addr, salen); |
e6dd731c | 1572 | if (result < 0) { |
1e3e238e | 1573 | pr_err("Error binding to the multicast addr\n"); |
1da177e4 LT |
1574 | goto error; |
1575 | } | |
1576 | ||
1577 | /* join the multicast group */ | |
d3328817 JA |
1578 | #ifdef CONFIG_IP_VS_IPV6 |
1579 | if (ipvs->bcfg.mcast_af == AF_INET6) | |
1580 | result = join_mcast_group6(sock->sk, &mcast_addr.in6.sin6_addr, | |
1581 | ipvs->bcfg.mcast_ifn); | |
1582 | else | |
1583 | #endif | |
1584 | result = join_mcast_group(sock->sk, &mcast_addr.in.sin_addr, | |
1585 | ipvs->bcfg.mcast_ifn); | |
e6dd731c | 1586 | if (result < 0) { |
1e3e238e | 1587 | pr_err("Error joining to the multicast group\n"); |
1da177e4 LT |
1588 | goto error; |
1589 | } | |
1590 | ||
1591 | return sock; | |
1592 | ||
1ae132b0 | 1593 | error: |
26abe143 | 1594 | sock_release(sock); |
e6dd731c | 1595 | return ERR_PTR(result); |
1da177e4 LT |
1596 | } |
1597 | ||
1598 | ||
1599 | static int | |
1600 | ip_vs_send_async(struct socket *sock, const char *buffer, const size_t length) | |
1601 | { | |
1602 | struct msghdr msg = {.msg_flags = MSG_DONTWAIT|MSG_NOSIGNAL}; | |
1603 | struct kvec iov; | |
1604 | int len; | |
1605 | ||
1606 | EnterFunction(7); | |
1607 | iov.iov_base = (void *)buffer; | |
1608 | iov.iov_len = length; | |
1609 | ||
1610 | len = kernel_sendmsg(sock, &msg, &iov, 1, (size_t)(length)); | |
1611 | ||
1612 | LeaveFunction(7); | |
1613 | return len; | |
1614 | } | |
1615 | ||
1c003b15 | 1616 | static int |
1da177e4 LT |
1617 | ip_vs_send_sync_msg(struct socket *sock, struct ip_vs_sync_mesg *msg) |
1618 | { | |
1619 | int msize; | |
1c003b15 | 1620 | int ret; |
1da177e4 | 1621 | |
38561437 | 1622 | msize = ntohs(msg->size); |
1da177e4 | 1623 | |
1c003b15 PNA |
1624 | ret = ip_vs_send_async(sock, (char *)msg, msize); |
1625 | if (ret >= 0 || ret == -EAGAIN) | |
1626 | return ret; | |
1627 | pr_err("ip_vs_send_async error %d\n", ret); | |
1628 | return 0; | |
1da177e4 LT |
1629 | } |
1630 | ||
1631 | static int | |
1632 | ip_vs_receive(struct socket *sock, char *buffer, const size_t buflen) | |
1633 | { | |
1634 | struct msghdr msg = {NULL,}; | |
1635 | struct kvec iov; | |
1636 | int len; | |
1637 | ||
1638 | EnterFunction(7); | |
1639 | ||
1640 | /* Receive a packet */ | |
1641 | iov.iov_base = buffer; | |
1642 | iov.iov_len = (size_t)buflen; | |
1643 | ||
f73181c8 | 1644 | len = kernel_recvmsg(sock, &msg, &iov, 1, buflen, MSG_DONTWAIT); |
1da177e4 LT |
1645 | |
1646 | if (len < 0) | |
f73181c8 | 1647 | return len; |
1da177e4 LT |
1648 | |
1649 | LeaveFunction(7); | |
1650 | return len; | |
1651 | } | |
1652 | ||
1c003b15 PNA |
1653 | /* Wakeup the master thread for sending */ |
1654 | static void master_wakeup_work_handler(struct work_struct *work) | |
1655 | { | |
f73181c8 PNA |
1656 | struct ipvs_master_sync_state *ms = |
1657 | container_of(work, struct ipvs_master_sync_state, | |
1658 | master_wakeup_work.work); | |
1659 | struct netns_ipvs *ipvs = ms->ipvs; | |
1c003b15 PNA |
1660 | |
1661 | spin_lock_bh(&ipvs->sync_lock); | |
f73181c8 PNA |
1662 | if (ms->sync_queue_len && |
1663 | ms->sync_queue_delay < IPVS_SYNC_WAKEUP_RATE) { | |
1664 | ms->sync_queue_delay = IPVS_SYNC_WAKEUP_RATE; | |
1665 | wake_up_process(ms->master_thread); | |
1c003b15 PNA |
1666 | } |
1667 | spin_unlock_bh(&ipvs->sync_lock); | |
1668 | } | |
1669 | ||
1670 | /* Get next buffer to send */ | |
1671 | static inline struct ip_vs_sync_buff * | |
f73181c8 | 1672 | next_sync_buff(struct netns_ipvs *ipvs, struct ipvs_master_sync_state *ms) |
1c003b15 PNA |
1673 | { |
1674 | struct ip_vs_sync_buff *sb; | |
1675 | ||
f73181c8 | 1676 | sb = sb_dequeue(ipvs, ms); |
1c003b15 PNA |
1677 | if (sb) |
1678 | return sb; | |
1679 | /* Do not delay entries in buffer for more than 2 seconds */ | |
f73181c8 | 1680 | return get_curr_sync_buff(ipvs, ms, IPVS_SYNC_FLUSH_TIME); |
1c003b15 | 1681 | } |
1da177e4 | 1682 | |
998e7a76 | 1683 | static int sync_thread_master(void *data) |
1da177e4 | 1684 | { |
998e7a76 | 1685 | struct ip_vs_sync_thread_data *tinfo = data; |
37b68e6d | 1686 | struct netns_ipvs *ipvs = tinfo->ipvs; |
f73181c8 | 1687 | struct ipvs_master_sync_state *ms = &ipvs->ms[tinfo->id]; |
1c003b15 | 1688 | struct sock *sk = tinfo->sock->sk; |
1da177e4 LT |
1689 | struct ip_vs_sync_buff *sb; |
1690 | ||
1e3e238e | 1691 | pr_info("sync thread started: state = MASTER, mcast_ifn = %s, " |
f73181c8 | 1692 | "syncid = %d, id = %d\n", |
e4ff6751 | 1693 | ipvs->mcfg.mcast_ifn, ipvs->mcfg.syncid, tinfo->id); |
1da177e4 | 1694 | |
1c003b15 | 1695 | for (;;) { |
f73181c8 | 1696 | sb = next_sync_buff(ipvs, ms); |
1c003b15 PNA |
1697 | if (unlikely(kthread_should_stop())) |
1698 | break; | |
1699 | if (!sb) { | |
1700 | schedule_timeout(IPVS_SYNC_CHECK_PERIOD); | |
1701 | continue; | |
1da177e4 | 1702 | } |
1c003b15 | 1703 | while (ip_vs_send_sync_msg(tinfo->sock, sb->mesg) < 0) { |
9dcbe1b8 GU |
1704 | /* (Ab)use interruptible sleep to avoid increasing |
1705 | * the load avg. | |
1706 | */ | |
1707 | __wait_event_interruptible(*sk_sleep(sk), | |
1c003b15 | 1708 | sock_writeable(sk) || |
35a2af94 | 1709 | kthread_should_stop()); |
1c003b15 PNA |
1710 | if (unlikely(kthread_should_stop())) |
1711 | goto done; | |
1da177e4 | 1712 | } |
1c003b15 | 1713 | ip_vs_sync_buff_release(sb); |
1da177e4 LT |
1714 | } |
1715 | ||
1c003b15 PNA |
1716 | done: |
1717 | __set_current_state(TASK_RUNNING); | |
1718 | if (sb) | |
1719 | ip_vs_sync_buff_release(sb); | |
1720 | ||
1da177e4 | 1721 | /* clean up the sync_buff queue */ |
f73181c8 | 1722 | while ((sb = sb_dequeue(ipvs, ms))) |
1da177e4 | 1723 | ip_vs_sync_buff_release(sb); |
1c003b15 | 1724 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
1725 | |
1726 | /* clean up the current sync_buff */ | |
f73181c8 | 1727 | sb = get_curr_sync_buff(ipvs, ms, 0); |
f131315f | 1728 | if (sb) |
1da177e4 | 1729 | ip_vs_sync_buff_release(sb); |
1da177e4 LT |
1730 | |
1731 | /* release the sending multicast socket */ | |
26abe143 | 1732 | sock_release(tinfo->sock); |
998e7a76 SW |
1733 | kfree(tinfo); |
1734 | ||
1735 | return 0; | |
1da177e4 LT |
1736 | } |
1737 | ||
1738 | ||
998e7a76 | 1739 | static int sync_thread_backup(void *data) |
1da177e4 | 1740 | { |
998e7a76 | 1741 | struct ip_vs_sync_thread_data *tinfo = data; |
37b68e6d | 1742 | struct netns_ipvs *ipvs = tinfo->ipvs; |
1da177e4 LT |
1743 | int len; |
1744 | ||
1e3e238e | 1745 | pr_info("sync thread started: state = BACKUP, mcast_ifn = %s, " |
f73181c8 | 1746 | "syncid = %d, id = %d\n", |
e4ff6751 | 1747 | ipvs->bcfg.mcast_ifn, ipvs->bcfg.syncid, tinfo->id); |
1da177e4 | 1748 | |
998e7a76 | 1749 | while (!kthread_should_stop()) { |
aa395145 | 1750 | wait_event_interruptible(*sk_sleep(tinfo->sock->sk), |
ba6fd850 SW |
1751 | !skb_queue_empty(&tinfo->sock->sk->sk_receive_queue) |
1752 | || kthread_should_stop()); | |
1753 | ||
998e7a76 SW |
1754 | /* do we have data now? */ |
1755 | while (!skb_queue_empty(&(tinfo->sock->sk->sk_receive_queue))) { | |
1756 | len = ip_vs_receive(tinfo->sock, tinfo->buf, | |
e4ff6751 | 1757 | ipvs->bcfg.sync_maxlen); |
998e7a76 | 1758 | if (len <= 0) { |
f73181c8 PNA |
1759 | if (len != -EAGAIN) |
1760 | pr_err("receiving message error\n"); | |
1da177e4 LT |
1761 | break; |
1762 | } | |
998e7a76 | 1763 | |
7d537f3a | 1764 | ip_vs_process_message(ipvs, tinfo->buf, len); |
1da177e4 | 1765 | } |
1da177e4 LT |
1766 | } |
1767 | ||
1768 | /* release the sending multicast socket */ | |
26abe143 | 1769 | sock_release(tinfo->sock); |
998e7a76 SW |
1770 | kfree(tinfo->buf); |
1771 | kfree(tinfo); | |
1da177e4 | 1772 | |
998e7a76 | 1773 | return 0; |
1da177e4 LT |
1774 | } |
1775 | ||
1776 | ||
6ac121d7 | 1777 | int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *c, |
e4ff6751 | 1778 | int state) |
1da177e4 | 1779 | { |
998e7a76 | 1780 | struct ip_vs_sync_thread_data *tinfo; |
f73181c8 | 1781 | struct task_struct **array = NULL, *task; |
998e7a76 | 1782 | struct socket *sock; |
e4ff6751 | 1783 | struct net_device *dev; |
f73181c8 | 1784 | char *name; |
998e7a76 | 1785 | int (*threadfn)(void *data); |
e4ff6751 | 1786 | int id, count, hlen; |
998e7a76 | 1787 | int result = -ENOMEM; |
e4ff6751 | 1788 | u16 mtu, min_mtu; |
1da177e4 | 1789 | |
1e3e238e | 1790 | IP_VS_DBG(7, "%s(): pid %d\n", __func__, task_pid_nr(current)); |
998e7a76 | 1791 | IP_VS_DBG(7, "Each ip_vs_sync_conn entry needs %Zd bytes\n", |
2981bc9a | 1792 | sizeof(struct ip_vs_sync_conn_v0)); |
1da177e4 | 1793 | |
f73181c8 PNA |
1794 | if (!ipvs->sync_state) { |
1795 | count = clamp(sysctl_sync_ports(ipvs), 1, IPVS_SYNC_PORTS_MAX); | |
1796 | ipvs->threads_mask = count - 1; | |
1797 | } else | |
1798 | count = ipvs->threads_mask + 1; | |
ae1d48b2 | 1799 | |
d3328817 JA |
1800 | if (c->mcast_af == AF_UNSPEC) { |
1801 | c->mcast_af = AF_INET; | |
1802 | c->mcast_group.ip = cpu_to_be32(IP_VS_SYNC_GROUP); | |
1803 | } | |
1804 | if (!c->mcast_port) | |
1805 | c->mcast_port = IP_VS_SYNC_PORT; | |
1806 | if (!c->mcast_ttl) | |
1807 | c->mcast_ttl = 1; | |
1808 | ||
6ac121d7 | 1809 | dev = __dev_get_by_name(ipvs->net, c->mcast_ifn); |
e4ff6751 JA |
1810 | if (!dev) { |
1811 | pr_err("Unknown mcast interface: %s\n", c->mcast_ifn); | |
1812 | return -ENODEV; | |
1813 | } | |
d3328817 JA |
1814 | hlen = (AF_INET6 == c->mcast_af) ? |
1815 | sizeof(struct ipv6hdr) + sizeof(struct udphdr) : | |
1816 | sizeof(struct iphdr) + sizeof(struct udphdr); | |
e4ff6751 JA |
1817 | mtu = (state == IP_VS_STATE_BACKUP) ? |
1818 | clamp(dev->mtu, 1500U, 65535U) : 1500U; | |
1819 | min_mtu = (state == IP_VS_STATE_BACKUP) ? 1024 : 1; | |
1820 | ||
1821 | if (c->sync_maxlen) | |
1822 | c->sync_maxlen = clamp_t(unsigned int, | |
1823 | c->sync_maxlen, min_mtu, | |
1824 | 65535 - hlen); | |
1825 | else | |
1826 | c->sync_maxlen = mtu - hlen; | |
1827 | ||
998e7a76 | 1828 | if (state == IP_VS_STATE_MASTER) { |
f73181c8 | 1829 | if (ipvs->ms) |
998e7a76 | 1830 | return -EEXIST; |
1da177e4 | 1831 | |
e4ff6751 | 1832 | ipvs->mcfg = *c; |
f73181c8 | 1833 | name = "ipvs-m:%d:%d"; |
998e7a76 | 1834 | threadfn = sync_thread_master; |
998e7a76 | 1835 | } else if (state == IP_VS_STATE_BACKUP) { |
f73181c8 | 1836 | if (ipvs->backup_threads) |
998e7a76 SW |
1837 | return -EEXIST; |
1838 | ||
e4ff6751 | 1839 | ipvs->bcfg = *c; |
f73181c8 | 1840 | name = "ipvs-b:%d:%d"; |
998e7a76 | 1841 | threadfn = sync_thread_backup; |
1da177e4 | 1842 | } else { |
1da177e4 LT |
1843 | return -EINVAL; |
1844 | } | |
1845 | ||
f73181c8 PNA |
1846 | if (state == IP_VS_STATE_MASTER) { |
1847 | struct ipvs_master_sync_state *ms; | |
1da177e4 | 1848 | |
f73181c8 PNA |
1849 | ipvs->ms = kzalloc(count * sizeof(ipvs->ms[0]), GFP_KERNEL); |
1850 | if (!ipvs->ms) | |
1851 | goto out; | |
1852 | ms = ipvs->ms; | |
1853 | for (id = 0; id < count; id++, ms++) { | |
1854 | INIT_LIST_HEAD(&ms->sync_queue); | |
1855 | ms->sync_queue_len = 0; | |
1856 | ms->sync_queue_delay = 0; | |
1857 | INIT_DELAYED_WORK(&ms->master_wakeup_work, | |
1858 | master_wakeup_work_handler); | |
1859 | ms->ipvs = ipvs; | |
1860 | } | |
1861 | } else { | |
1862 | array = kzalloc(count * sizeof(struct task_struct *), | |
1863 | GFP_KERNEL); | |
1864 | if (!array) | |
1865 | goto out; | |
998e7a76 | 1866 | } |
1da177e4 | 1867 | |
f73181c8 PNA |
1868 | tinfo = NULL; |
1869 | for (id = 0; id < count; id++) { | |
1870 | if (state == IP_VS_STATE_MASTER) | |
68c76b6a | 1871 | sock = make_send_sock(ipvs, id); |
f73181c8 | 1872 | else |
3777ed68 | 1873 | sock = make_receive_sock(ipvs, id, dev->ifindex); |
f73181c8 PNA |
1874 | if (IS_ERR(sock)) { |
1875 | result = PTR_ERR(sock); | |
1876 | goto outtinfo; | |
1877 | } | |
1878 | tinfo = kmalloc(sizeof(*tinfo), GFP_KERNEL); | |
1879 | if (!tinfo) | |
1880 | goto outsocket; | |
37b68e6d | 1881 | tinfo->ipvs = ipvs; |
f73181c8 PNA |
1882 | tinfo->sock = sock; |
1883 | if (state == IP_VS_STATE_BACKUP) { | |
e4ff6751 | 1884 | tinfo->buf = kmalloc(ipvs->bcfg.sync_maxlen, |
f73181c8 PNA |
1885 | GFP_KERNEL); |
1886 | if (!tinfo->buf) | |
1887 | goto outtinfo; | |
b425df4c DC |
1888 | } else { |
1889 | tinfo->buf = NULL; | |
f73181c8 PNA |
1890 | } |
1891 | tinfo->id = id; | |
1da177e4 | 1892 | |
f73181c8 PNA |
1893 | task = kthread_run(threadfn, tinfo, name, ipvs->gen, id); |
1894 | if (IS_ERR(task)) { | |
1895 | result = PTR_ERR(task); | |
1896 | goto outtinfo; | |
1897 | } | |
1898 | tinfo = NULL; | |
1899 | if (state == IP_VS_STATE_MASTER) | |
1900 | ipvs->ms[id].master_thread = task; | |
1901 | else | |
1902 | array[id] = task; | |
998e7a76 | 1903 | } |
1da177e4 | 1904 | |
998e7a76 | 1905 | /* mark as active */ |
f73181c8 PNA |
1906 | |
1907 | if (state == IP_VS_STATE_BACKUP) | |
1908 | ipvs->backup_threads = array; | |
1909 | spin_lock_bh(&ipvs->sync_buff_lock); | |
f131315f | 1910 | ipvs->sync_state |= state; |
f73181c8 | 1911 | spin_unlock_bh(&ipvs->sync_buff_lock); |
1da177e4 | 1912 | |
998e7a76 SW |
1913 | /* increase the module use count */ |
1914 | ip_vs_use_count_inc(); | |
1da177e4 LT |
1915 | |
1916 | return 0; | |
1da177e4 | 1917 | |
998e7a76 | 1918 | outsocket: |
26abe143 | 1919 | sock_release(sock); |
f73181c8 PNA |
1920 | |
1921 | outtinfo: | |
1922 | if (tinfo) { | |
26abe143 | 1923 | sock_release(tinfo->sock); |
f73181c8 PNA |
1924 | kfree(tinfo->buf); |
1925 | kfree(tinfo); | |
1926 | } | |
1927 | count = id; | |
1928 | while (count-- > 0) { | |
1929 | if (state == IP_VS_STATE_MASTER) | |
1930 | kthread_stop(ipvs->ms[count].master_thread); | |
1931 | else | |
1932 | kthread_stop(array[count]); | |
1933 | } | |
1934 | kfree(array); | |
1935 | ||
998e7a76 | 1936 | out: |
f73181c8 PNA |
1937 | if (!(ipvs->sync_state & IP_VS_STATE_MASTER)) { |
1938 | kfree(ipvs->ms); | |
1939 | ipvs->ms = NULL; | |
1940 | } | |
998e7a76 | 1941 | return result; |
1da177e4 LT |
1942 | } |
1943 | ||
1944 | ||
b3cf3cbf | 1945 | int stop_sync_thread(struct netns_ipvs *ipvs, int state) |
1da177e4 | 1946 | { |
f73181c8 PNA |
1947 | struct task_struct **array; |
1948 | int id; | |
1ae132b0 | 1949 | int retc = -EINVAL; |
f131315f | 1950 | |
1e3e238e | 1951 | IP_VS_DBG(7, "%s(): pid %d\n", __func__, task_pid_nr(current)); |
1da177e4 | 1952 | |
1da177e4 | 1953 | if (state == IP_VS_STATE_MASTER) { |
f73181c8 | 1954 | if (!ipvs->ms) |
998e7a76 | 1955 | return -ESRCH; |
cc0191ae | 1956 | |
998e7a76 SW |
1957 | /* |
1958 | * The lock synchronizes with sb_queue_tail(), so that we don't | |
1959 | * add sync buffers to the queue, when we are already in | |
1960 | * progress of stopping the master sync daemon. | |
1961 | */ | |
1da177e4 | 1962 | |
f73181c8 PNA |
1963 | spin_lock_bh(&ipvs->sync_buff_lock); |
1964 | spin_lock(&ipvs->sync_lock); | |
f131315f | 1965 | ipvs->sync_state &= ~IP_VS_STATE_MASTER; |
f73181c8 PNA |
1966 | spin_unlock(&ipvs->sync_lock); |
1967 | spin_unlock_bh(&ipvs->sync_buff_lock); | |
1968 | ||
1969 | retc = 0; | |
1970 | for (id = ipvs->threads_mask; id >= 0; id--) { | |
1971 | struct ipvs_master_sync_state *ms = &ipvs->ms[id]; | |
1972 | int ret; | |
1973 | ||
1974 | pr_info("stopping master sync thread %d ...\n", | |
1975 | task_pid_nr(ms->master_thread)); | |
1976 | cancel_delayed_work_sync(&ms->master_wakeup_work); | |
1977 | ret = kthread_stop(ms->master_thread); | |
1978 | if (retc >= 0) | |
1979 | retc = ret; | |
1980 | } | |
1981 | kfree(ipvs->ms); | |
1982 | ipvs->ms = NULL; | |
998e7a76 | 1983 | } else if (state == IP_VS_STATE_BACKUP) { |
f73181c8 | 1984 | if (!ipvs->backup_threads) |
998e7a76 SW |
1985 | return -ESRCH; |
1986 | ||
f131315f | 1987 | ipvs->sync_state &= ~IP_VS_STATE_BACKUP; |
f73181c8 PNA |
1988 | array = ipvs->backup_threads; |
1989 | retc = 0; | |
1990 | for (id = ipvs->threads_mask; id >= 0; id--) { | |
1991 | int ret; | |
1992 | ||
1993 | pr_info("stopping backup sync thread %d ...\n", | |
1994 | task_pid_nr(array[id])); | |
1995 | ret = kthread_stop(array[id]); | |
1996 | if (retc >= 0) | |
1997 | retc = ret; | |
1998 | } | |
1999 | kfree(array); | |
2000 | ipvs->backup_threads = NULL; | |
998e7a76 | 2001 | } |
1da177e4 | 2002 | |
998e7a76 SW |
2003 | /* decrease the module use count */ |
2004 | ip_vs_use_count_dec(); | |
1da177e4 | 2005 | |
1ae132b0 | 2006 | return retc; |
1da177e4 | 2007 | } |
61b1ab45 HS |
2008 | |
2009 | /* | |
2010 | * Initialize data struct for each netns | |
2011 | */ | |
802cb437 | 2012 | int __net_init ip_vs_sync_net_init(struct netns_ipvs *ipvs) |
61b1ab45 | 2013 | { |
ae1d48b2 | 2014 | __mutex_init(&ipvs->sync_mutex, "ipvs->sync_mutex", &__ipvs_sync_key); |
f131315f HS |
2015 | spin_lock_init(&ipvs->sync_lock); |
2016 | spin_lock_init(&ipvs->sync_buff_lock); | |
61b1ab45 HS |
2017 | return 0; |
2018 | } | |
2019 | ||
ebea1f7c | 2020 | void ip_vs_sync_net_cleanup(struct netns_ipvs *ipvs) |
61b1ab45 | 2021 | { |
1ae132b0 HS |
2022 | int retc; |
2023 | ||
ae1d48b2 | 2024 | mutex_lock(&ipvs->sync_mutex); |
b3cf3cbf | 2025 | retc = stop_sync_thread(ipvs, IP_VS_STATE_MASTER); |
1ae132b0 HS |
2026 | if (retc && retc != -ESRCH) |
2027 | pr_err("Failed to stop Master Daemon\n"); | |
2028 | ||
b3cf3cbf | 2029 | retc = stop_sync_thread(ipvs, IP_VS_STATE_BACKUP); |
1ae132b0 HS |
2030 | if (retc && retc != -ESRCH) |
2031 | pr_err("Failed to stop Backup Daemon\n"); | |
ae1d48b2 | 2032 | mutex_unlock(&ipvs->sync_mutex); |
61b1ab45 | 2033 | } |