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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/types.h> |
3 | #include <linux/atmmpc.h> | |
5a0e3ad6 | 4 | #include <linux/slab.h> |
1da177e4 LT |
5 | #include <linux/time.h> |
6 | ||
7 | #include "mpoa_caches.h" | |
8 | #include "mpc.h" | |
9 | ||
10 | /* | |
11 | * mpoa_caches.c: Implementation of ingress and egress cache | |
12 | * handling functions | |
13 | */ | |
14 | ||
15 | #if 0 | |
b50c2ea7 JP |
16 | #define dprintk(format, args...) \ |
17 | printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ | |
1da177e4 | 18 | #else |
b50c2ea7 JP |
19 | #define dprintk(format, args...) \ |
20 | do { if (0) \ | |
21 | printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ | |
22 | } while (0) | |
1da177e4 LT |
23 | #endif |
24 | ||
25 | #if 0 | |
b50c2ea7 JP |
26 | #define ddprintk(format, args...) \ |
27 | printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */ | |
1da177e4 | 28 | #else |
b50c2ea7 JP |
29 | #define ddprintk(format, args...) \ |
30 | do { if (0) \ | |
31 | printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\ | |
32 | } while (0) | |
1da177e4 LT |
33 | #endif |
34 | ||
30d492da | 35 | static in_cache_entry *in_cache_get(__be32 dst_ip, |
1da177e4 LT |
36 | struct mpoa_client *client) |
37 | { | |
38 | in_cache_entry *entry; | |
39 | ||
40 | read_lock_bh(&client->ingress_lock); | |
41 | entry = client->in_cache; | |
bee67d34 JP |
42 | while (entry != NULL) { |
43 | if (entry->ctrl_info.in_dst_ip == dst_ip) { | |
93714912 | 44 | refcount_inc(&entry->use); |
1da177e4 LT |
45 | read_unlock_bh(&client->ingress_lock); |
46 | return entry; | |
47 | } | |
48 | entry = entry->next; | |
49 | } | |
50 | read_unlock_bh(&client->ingress_lock); | |
51 | ||
52 | return NULL; | |
53 | } | |
54 | ||
30d492da | 55 | static in_cache_entry *in_cache_get_with_mask(__be32 dst_ip, |
1da177e4 | 56 | struct mpoa_client *client, |
30d492da | 57 | __be32 mask) |
1da177e4 LT |
58 | { |
59 | in_cache_entry *entry; | |
60 | ||
61 | read_lock_bh(&client->ingress_lock); | |
62 | entry = client->in_cache; | |
bee67d34 JP |
63 | while (entry != NULL) { |
64 | if ((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask)) { | |
93714912 | 65 | refcount_inc(&entry->use); |
1da177e4 LT |
66 | read_unlock_bh(&client->ingress_lock); |
67 | return entry; | |
68 | } | |
69 | entry = entry->next; | |
70 | } | |
71 | read_unlock_bh(&client->ingress_lock); | |
72 | ||
73 | return NULL; | |
74 | ||
75 | } | |
76 | ||
77 | static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc, | |
bee67d34 | 78 | struct mpoa_client *client) |
1da177e4 LT |
79 | { |
80 | in_cache_entry *entry; | |
81 | ||
82 | read_lock_bh(&client->ingress_lock); | |
83 | entry = client->in_cache; | |
bee67d34 JP |
84 | while (entry != NULL) { |
85 | if (entry->shortcut == vcc) { | |
93714912 | 86 | refcount_inc(&entry->use); |
1da177e4 LT |
87 | read_unlock_bh(&client->ingress_lock); |
88 | return entry; | |
89 | } | |
90 | entry = entry->next; | |
91 | } | |
92 | read_unlock_bh(&client->ingress_lock); | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
30d492da | 97 | static in_cache_entry *in_cache_add_entry(__be32 dst_ip, |
1da177e4 LT |
98 | struct mpoa_client *client) |
99 | { | |
2afe37cd | 100 | in_cache_entry *entry = kzalloc(sizeof(in_cache_entry), GFP_KERNEL); |
1da177e4 LT |
101 | |
102 | if (entry == NULL) { | |
bee67d34 | 103 | pr_info("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n"); |
1da177e4 LT |
104 | return NULL; |
105 | } | |
106 | ||
b50c2ea7 | 107 | dprintk("adding an ingress entry, ip = %pI4\n", &dst_ip); |
1da177e4 | 108 | |
93714912 | 109 | refcount_set(&entry->use, 1); |
b50c2ea7 | 110 | dprintk("new_in_cache_entry: about to lock\n"); |
1da177e4 LT |
111 | write_lock_bh(&client->ingress_lock); |
112 | entry->next = client->in_cache; | |
113 | entry->prev = NULL; | |
114 | if (client->in_cache != NULL) | |
115 | client->in_cache->prev = entry; | |
116 | client->in_cache = entry; | |
117 | ||
118 | memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); | |
119 | entry->ctrl_info.in_dst_ip = dst_ip; | |
120 | do_gettimeofday(&(entry->tv)); | |
121 | entry->retry_time = client->parameters.mpc_p4; | |
122 | entry->count = 1; | |
123 | entry->entry_state = INGRESS_INVALID; | |
124 | entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT; | |
93714912 | 125 | refcount_inc(&entry->use); |
1da177e4 LT |
126 | |
127 | write_unlock_bh(&client->ingress_lock); | |
b50c2ea7 | 128 | dprintk("new_in_cache_entry: unlocked\n"); |
1da177e4 LT |
129 | |
130 | return entry; | |
131 | } | |
132 | ||
133 | static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc) | |
134 | { | |
135 | struct atm_mpoa_qos *qos; | |
136 | struct k_message msg; | |
137 | ||
138 | entry->count++; | |
bee67d34 | 139 | if (entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL) |
1da177e4 LT |
140 | return OPEN; |
141 | ||
bee67d34 JP |
142 | if (entry->entry_state == INGRESS_REFRESHING) { |
143 | if (entry->count > mpc->parameters.mpc_p1) { | |
1da177e4 LT |
144 | msg.type = SND_MPOA_RES_RQST; |
145 | msg.content.in_info = entry->ctrl_info; | |
146 | memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN); | |
147 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); | |
bee67d34 JP |
148 | if (qos != NULL) |
149 | msg.qos = qos->qos; | |
1da177e4 LT |
150 | msg_to_mpoad(&msg, mpc); |
151 | do_gettimeofday(&(entry->reply_wait)); | |
152 | entry->entry_state = INGRESS_RESOLVING; | |
153 | } | |
bee67d34 | 154 | if (entry->shortcut != NULL) |
1da177e4 LT |
155 | return OPEN; |
156 | return CLOSED; | |
157 | } | |
158 | ||
bee67d34 | 159 | if (entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL) |
1da177e4 LT |
160 | return OPEN; |
161 | ||
bee67d34 JP |
162 | if (entry->count > mpc->parameters.mpc_p1 && |
163 | entry->entry_state == INGRESS_INVALID) { | |
b50c2ea7 | 164 | dprintk("(%s) threshold exceeded for ip %pI4, sending MPOA res req\n", |
21454aaa | 165 | mpc->dev->name, &entry->ctrl_info.in_dst_ip); |
1da177e4 | 166 | entry->entry_state = INGRESS_RESOLVING; |
bee67d34 JP |
167 | msg.type = SND_MPOA_RES_RQST; |
168 | memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN); | |
1da177e4 LT |
169 | msg.content.in_info = entry->ctrl_info; |
170 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); | |
bee67d34 JP |
171 | if (qos != NULL) |
172 | msg.qos = qos->qos; | |
173 | msg_to_mpoad(&msg, mpc); | |
1da177e4 LT |
174 | do_gettimeofday(&(entry->reply_wait)); |
175 | } | |
176 | ||
177 | return CLOSED; | |
178 | } | |
179 | ||
180 | static void in_cache_put(in_cache_entry *entry) | |
181 | { | |
93714912 | 182 | if (refcount_dec_and_test(&entry->use)) { |
1da177e4 LT |
183 | memset(entry, 0, sizeof(in_cache_entry)); |
184 | kfree(entry); | |
185 | } | |
1da177e4 LT |
186 | } |
187 | ||
188 | /* | |
189 | * This should be called with write lock on | |
190 | */ | |
191 | static void in_cache_remove_entry(in_cache_entry *entry, | |
192 | struct mpoa_client *client) | |
193 | { | |
194 | struct atm_vcc *vcc; | |
195 | struct k_message msg; | |
1da177e4 LT |
196 | |
197 | vcc = entry->shortcut; | |
b50c2ea7 | 198 | dprintk("removing an ingress entry, ip = %pI4\n", |
21454aaa | 199 | &entry->ctrl_info.in_dst_ip); |
1da177e4 LT |
200 | |
201 | if (entry->prev != NULL) | |
202 | entry->prev->next = entry->next; | |
203 | else | |
204 | client->in_cache = entry->next; | |
205 | if (entry->next != NULL) | |
206 | entry->next->prev = entry->prev; | |
207 | client->in_ops->put(entry); | |
bee67d34 | 208 | if (client->in_cache == NULL && client->eg_cache == NULL) { |
1da177e4 | 209 | msg.type = STOP_KEEP_ALIVE_SM; |
bee67d34 | 210 | msg_to_mpoad(&msg, client); |
1da177e4 LT |
211 | } |
212 | ||
213 | /* Check if the egress side still uses this VCC */ | |
214 | if (vcc != NULL) { | |
bee67d34 JP |
215 | eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc, |
216 | client); | |
1da177e4 LT |
217 | if (eg_entry != NULL) { |
218 | client->eg_ops->put(eg_entry); | |
219 | return; | |
220 | } | |
221 | vcc_release_async(vcc, -EPIPE); | |
222 | } | |
1da177e4 LT |
223 | } |
224 | ||
1da177e4 LT |
225 | /* Call this every MPC-p2 seconds... Not exactly correct solution, |
226 | but an easy one... */ | |
227 | static void clear_count_and_expired(struct mpoa_client *client) | |
228 | { | |
1da177e4 LT |
229 | in_cache_entry *entry, *next_entry; |
230 | struct timeval now; | |
231 | ||
232 | do_gettimeofday(&now); | |
233 | ||
234 | write_lock_bh(&client->ingress_lock); | |
235 | entry = client->in_cache; | |
bee67d34 JP |
236 | while (entry != NULL) { |
237 | entry->count = 0; | |
1da177e4 | 238 | next_entry = entry->next; |
bee67d34 JP |
239 | if ((now.tv_sec - entry->tv.tv_sec) |
240 | > entry->ctrl_info.holding_time) { | |
b50c2ea7 | 241 | dprintk("holding time expired, ip = %pI4\n", |
21454aaa | 242 | &entry->ctrl_info.in_dst_ip); |
1da177e4 LT |
243 | client->in_ops->remove_entry(entry, client); |
244 | } | |
245 | entry = next_entry; | |
246 | } | |
247 | write_unlock_bh(&client->ingress_lock); | |
1da177e4 LT |
248 | } |
249 | ||
250 | /* Call this every MPC-p4 seconds. */ | |
251 | static void check_resolving_entries(struct mpoa_client *client) | |
252 | { | |
253 | ||
254 | struct atm_mpoa_qos *qos; | |
255 | in_cache_entry *entry; | |
256 | struct timeval now; | |
257 | struct k_message msg; | |
258 | ||
bee67d34 | 259 | do_gettimeofday(&now); |
1da177e4 LT |
260 | |
261 | read_lock_bh(&client->ingress_lock); | |
262 | entry = client->in_cache; | |
bee67d34 JP |
263 | while (entry != NULL) { |
264 | if (entry->entry_state == INGRESS_RESOLVING) { | |
265 | if ((now.tv_sec - entry->hold_down.tv_sec) < | |
266 | client->parameters.mpc_p6) { | |
267 | entry = entry->next; /* Entry in hold down */ | |
1da177e4 LT |
268 | continue; |
269 | } | |
bee67d34 JP |
270 | if ((now.tv_sec - entry->reply_wait.tv_sec) > |
271 | entry->retry_time) { | |
272 | entry->retry_time = MPC_C1 * (entry->retry_time); | |
273 | /* | |
274 | * Retry time maximum exceeded, | |
275 | * put entry in hold down. | |
276 | */ | |
277 | if (entry->retry_time > client->parameters.mpc_p5) { | |
1da177e4 LT |
278 | do_gettimeofday(&(entry->hold_down)); |
279 | entry->retry_time = client->parameters.mpc_p4; | |
280 | entry = entry->next; | |
281 | continue; | |
282 | } | |
283 | /* Ask daemon to send a resolution request. */ | |
bee67d34 | 284 | memset(&(entry->hold_down), 0, sizeof(struct timeval)); |
1da177e4 LT |
285 | msg.type = SND_MPOA_RES_RTRY; |
286 | memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN); | |
287 | msg.content.in_info = entry->ctrl_info; | |
288 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); | |
bee67d34 JP |
289 | if (qos != NULL) |
290 | msg.qos = qos->qos; | |
1da177e4 LT |
291 | msg_to_mpoad(&msg, client); |
292 | do_gettimeofday(&(entry->reply_wait)); | |
293 | } | |
294 | } | |
295 | entry = entry->next; | |
296 | } | |
297 | read_unlock_bh(&client->ingress_lock); | |
298 | } | |
299 | ||
300 | /* Call this every MPC-p5 seconds. */ | |
301 | static void refresh_entries(struct mpoa_client *client) | |
302 | { | |
303 | struct timeval now; | |
304 | struct in_cache_entry *entry = client->in_cache; | |
305 | ||
b50c2ea7 | 306 | ddprintk("refresh_entries\n"); |
1da177e4 LT |
307 | do_gettimeofday(&now); |
308 | ||
309 | read_lock_bh(&client->ingress_lock); | |
bee67d34 JP |
310 | while (entry != NULL) { |
311 | if (entry->entry_state == INGRESS_RESOLVED) { | |
312 | if (!(entry->refresh_time)) | |
313 | entry->refresh_time = (2 * (entry->ctrl_info.holding_time))/3; | |
314 | if ((now.tv_sec - entry->reply_wait.tv_sec) > | |
315 | entry->refresh_time) { | |
b50c2ea7 | 316 | dprintk("refreshing an entry.\n"); |
1da177e4 LT |
317 | entry->entry_state = INGRESS_REFRESHING; |
318 | ||
319 | } | |
320 | } | |
321 | entry = entry->next; | |
322 | } | |
323 | read_unlock_bh(&client->ingress_lock); | |
324 | } | |
325 | ||
326 | static void in_destroy_cache(struct mpoa_client *mpc) | |
327 | { | |
328 | write_lock_irq(&mpc->ingress_lock); | |
bee67d34 | 329 | while (mpc->in_cache != NULL) |
1da177e4 LT |
330 | mpc->in_ops->remove_entry(mpc->in_cache, mpc); |
331 | write_unlock_irq(&mpc->ingress_lock); | |
1da177e4 LT |
332 | } |
333 | ||
bee67d34 JP |
334 | static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id, |
335 | struct mpoa_client *mpc) | |
1da177e4 LT |
336 | { |
337 | eg_cache_entry *entry; | |
338 | ||
339 | read_lock_irq(&mpc->egress_lock); | |
340 | entry = mpc->eg_cache; | |
bee67d34 JP |
341 | while (entry != NULL) { |
342 | if (entry->ctrl_info.cache_id == cache_id) { | |
e00bdbef | 343 | refcount_inc(&entry->use); |
1da177e4 LT |
344 | read_unlock_irq(&mpc->egress_lock); |
345 | return entry; | |
346 | } | |
347 | entry = entry->next; | |
348 | } | |
349 | read_unlock_irq(&mpc->egress_lock); | |
350 | ||
351 | return NULL; | |
352 | } | |
353 | ||
354 | /* This can be called from any context since it saves CPU flags */ | |
30d492da | 355 | static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc) |
1da177e4 LT |
356 | { |
357 | unsigned long flags; | |
358 | eg_cache_entry *entry; | |
359 | ||
360 | read_lock_irqsave(&mpc->egress_lock, flags); | |
361 | entry = mpc->eg_cache; | |
bee67d34 | 362 | while (entry != NULL) { |
1da177e4 | 363 | if (entry->ctrl_info.tag == tag) { |
e00bdbef | 364 | refcount_inc(&entry->use); |
1da177e4 LT |
365 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
366 | return entry; | |
367 | } | |
368 | entry = entry->next; | |
369 | } | |
370 | read_unlock_irqrestore(&mpc->egress_lock, flags); | |
371 | ||
372 | return NULL; | |
373 | } | |
374 | ||
375 | /* This can be called from any context since it saves CPU flags */ | |
bee67d34 JP |
376 | static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc, |
377 | struct mpoa_client *mpc) | |
1da177e4 LT |
378 | { |
379 | unsigned long flags; | |
380 | eg_cache_entry *entry; | |
381 | ||
382 | read_lock_irqsave(&mpc->egress_lock, flags); | |
383 | entry = mpc->eg_cache; | |
bee67d34 | 384 | while (entry != NULL) { |
1da177e4 | 385 | if (entry->shortcut == vcc) { |
e00bdbef | 386 | refcount_inc(&entry->use); |
f7d57453 | 387 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
1da177e4 LT |
388 | return entry; |
389 | } | |
390 | entry = entry->next; | |
391 | } | |
392 | read_unlock_irqrestore(&mpc->egress_lock, flags); | |
393 | ||
394 | return NULL; | |
395 | } | |
396 | ||
bee67d34 JP |
397 | static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr, |
398 | struct mpoa_client *mpc) | |
1da177e4 LT |
399 | { |
400 | eg_cache_entry *entry; | |
401 | ||
402 | read_lock_irq(&mpc->egress_lock); | |
403 | entry = mpc->eg_cache; | |
bee67d34 JP |
404 | while (entry != NULL) { |
405 | if (entry->latest_ip_addr == ipaddr) { | |
e00bdbef | 406 | refcount_inc(&entry->use); |
f7d57453 | 407 | read_unlock_irq(&mpc->egress_lock); |
1da177e4 LT |
408 | return entry; |
409 | } | |
410 | entry = entry->next; | |
411 | } | |
412 | read_unlock_irq(&mpc->egress_lock); | |
413 | ||
414 | return NULL; | |
415 | } | |
416 | ||
417 | static void eg_cache_put(eg_cache_entry *entry) | |
418 | { | |
e00bdbef | 419 | if (refcount_dec_and_test(&entry->use)) { |
1da177e4 LT |
420 | memset(entry, 0, sizeof(eg_cache_entry)); |
421 | kfree(entry); | |
422 | } | |
1da177e4 LT |
423 | } |
424 | ||
425 | /* | |
426 | * This should be called with write lock on | |
427 | */ | |
428 | static void eg_cache_remove_entry(eg_cache_entry *entry, | |
429 | struct mpoa_client *client) | |
430 | { | |
431 | struct atm_vcc *vcc; | |
432 | struct k_message msg; | |
433 | ||
434 | vcc = entry->shortcut; | |
b50c2ea7 | 435 | dprintk("removing an egress entry.\n"); |
1da177e4 LT |
436 | if (entry->prev != NULL) |
437 | entry->prev->next = entry->next; | |
438 | else | |
439 | client->eg_cache = entry->next; | |
440 | if (entry->next != NULL) | |
441 | entry->next->prev = entry->prev; | |
442 | client->eg_ops->put(entry); | |
bee67d34 | 443 | if (client->in_cache == NULL && client->eg_cache == NULL) { |
1da177e4 | 444 | msg.type = STOP_KEEP_ALIVE_SM; |
bee67d34 | 445 | msg_to_mpoad(&msg, client); |
1da177e4 LT |
446 | } |
447 | ||
448 | /* Check if the ingress side still uses this VCC */ | |
449 | if (vcc != NULL) { | |
450 | in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client); | |
451 | if (in_entry != NULL) { | |
452 | client->in_ops->put(in_entry); | |
453 | return; | |
454 | } | |
455 | vcc_release_async(vcc, -EPIPE); | |
456 | } | |
1da177e4 LT |
457 | } |
458 | ||
bee67d34 JP |
459 | static eg_cache_entry *eg_cache_add_entry(struct k_message *msg, |
460 | struct mpoa_client *client) | |
1da177e4 | 461 | { |
2afe37cd | 462 | eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL); |
1da177e4 LT |
463 | |
464 | if (entry == NULL) { | |
bee67d34 | 465 | pr_info("out of memory\n"); |
1da177e4 LT |
466 | return NULL; |
467 | } | |
468 | ||
b50c2ea7 | 469 | dprintk("adding an egress entry, ip = %pI4, this should be our IP\n", |
21454aaa | 470 | &msg->content.eg_info.eg_dst_ip); |
1da177e4 | 471 | |
e00bdbef | 472 | refcount_set(&entry->use, 1); |
b50c2ea7 | 473 | dprintk("new_eg_cache_entry: about to lock\n"); |
1da177e4 LT |
474 | write_lock_irq(&client->egress_lock); |
475 | entry->next = client->eg_cache; | |
476 | entry->prev = NULL; | |
477 | if (client->eg_cache != NULL) | |
478 | client->eg_cache->prev = entry; | |
479 | client->eg_cache = entry; | |
480 | ||
481 | memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); | |
482 | entry->ctrl_info = msg->content.eg_info; | |
483 | do_gettimeofday(&(entry->tv)); | |
484 | entry->entry_state = EGRESS_RESOLVED; | |
b50c2ea7 | 485 | dprintk("new_eg_cache_entry cache_id %u\n", |
bee67d34 | 486 | ntohl(entry->ctrl_info.cache_id)); |
b50c2ea7 | 487 | dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip); |
e00bdbef | 488 | refcount_inc(&entry->use); |
1da177e4 LT |
489 | |
490 | write_unlock_irq(&client->egress_lock); | |
b50c2ea7 | 491 | dprintk("new_eg_cache_entry: unlocked\n"); |
1da177e4 LT |
492 | |
493 | return entry; | |
494 | } | |
495 | ||
bee67d34 | 496 | static void update_eg_cache_entry(eg_cache_entry *entry, uint16_t holding_time) |
1da177e4 LT |
497 | { |
498 | do_gettimeofday(&(entry->tv)); | |
499 | entry->entry_state = EGRESS_RESOLVED; | |
500 | entry->ctrl_info.holding_time = holding_time; | |
1da177e4 LT |
501 | } |
502 | ||
503 | static void clear_expired(struct mpoa_client *client) | |
504 | { | |
505 | eg_cache_entry *entry, *next_entry; | |
506 | struct timeval now; | |
507 | struct k_message msg; | |
508 | ||
509 | do_gettimeofday(&now); | |
510 | ||
511 | write_lock_irq(&client->egress_lock); | |
512 | entry = client->eg_cache; | |
bee67d34 | 513 | while (entry != NULL) { |
1da177e4 | 514 | next_entry = entry->next; |
bee67d34 JP |
515 | if ((now.tv_sec - entry->tv.tv_sec) |
516 | > entry->ctrl_info.holding_time) { | |
1da177e4 LT |
517 | msg.type = SND_EGRESS_PURGE; |
518 | msg.content.eg_info = entry->ctrl_info; | |
b50c2ea7 | 519 | dprintk("egress_cache: holding time expired, cache_id = %u.\n", |
bee67d34 | 520 | ntohl(entry->ctrl_info.cache_id)); |
1da177e4 LT |
521 | msg_to_mpoad(&msg, client); |
522 | client->eg_ops->remove_entry(entry, client); | |
523 | } | |
524 | entry = next_entry; | |
525 | } | |
526 | write_unlock_irq(&client->egress_lock); | |
1da177e4 LT |
527 | } |
528 | ||
529 | static void eg_destroy_cache(struct mpoa_client *mpc) | |
530 | { | |
531 | write_lock_irq(&mpc->egress_lock); | |
bee67d34 | 532 | while (mpc->eg_cache != NULL) |
1da177e4 LT |
533 | mpc->eg_ops->remove_entry(mpc->eg_cache, mpc); |
534 | write_unlock_irq(&mpc->egress_lock); | |
1da177e4 LT |
535 | } |
536 | ||
537 | ||
4dd191bb | 538 | static const struct in_cache_ops ingress_ops = { |
99a5e178 KC |
539 | .add_entry = in_cache_add_entry, |
540 | .get = in_cache_get, | |
541 | .get_with_mask = in_cache_get_with_mask, | |
542 | .get_by_vcc = in_cache_get_by_vcc, | |
543 | .put = in_cache_put, | |
544 | .remove_entry = in_cache_remove_entry, | |
545 | .cache_hit = cache_hit, | |
546 | .clear_count = clear_count_and_expired, | |
547 | .check_resolving = check_resolving_entries, | |
548 | .refresh = refresh_entries, | |
549 | .destroy_cache = in_destroy_cache | |
1da177e4 LT |
550 | }; |
551 | ||
4dd191bb | 552 | static const struct eg_cache_ops egress_ops = { |
99a5e178 KC |
553 | .add_entry = eg_cache_add_entry, |
554 | .get_by_cache_id = eg_cache_get_by_cache_id, | |
555 | .get_by_tag = eg_cache_get_by_tag, | |
556 | .get_by_vcc = eg_cache_get_by_vcc, | |
557 | .get_by_src_ip = eg_cache_get_by_src_ip, | |
558 | .put = eg_cache_put, | |
559 | .remove_entry = eg_cache_remove_entry, | |
560 | .update = update_eg_cache_entry, | |
561 | .clear_expired = clear_expired, | |
562 | .destroy_cache = eg_destroy_cache | |
1da177e4 LT |
563 | }; |
564 | ||
1da177e4 LT |
565 | void atm_mpoa_init_cache(struct mpoa_client *mpc) |
566 | { | |
567 | mpc->in_ops = &ingress_ops; | |
568 | mpc->eg_ops = &egress_ops; | |
1da177e4 | 569 | } |