Commit | Line | Data |
---|---|---|
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; | |
d750dbdc | 120 | entry->time = ktime_get_seconds(); |
1da177e4 LT |
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 | 150 | msg_to_mpoad(&msg, mpc); |
d750dbdc | 151 | entry->reply_wait = ktime_get_seconds(); |
1da177e4 LT |
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); | |
d750dbdc | 174 | entry->reply_wait = ktime_get_seconds(); |
1da177e4 LT |
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)) { |
453431a5 | 183 | kfree_sensitive(entry); |
1da177e4 | 184 | } |
1da177e4 LT |
185 | } |
186 | ||
187 | /* | |
188 | * This should be called with write lock on | |
189 | */ | |
190 | static void in_cache_remove_entry(in_cache_entry *entry, | |
191 | struct mpoa_client *client) | |
192 | { | |
193 | struct atm_vcc *vcc; | |
194 | struct k_message msg; | |
1da177e4 LT |
195 | |
196 | vcc = entry->shortcut; | |
b50c2ea7 | 197 | dprintk("removing an ingress entry, ip = %pI4\n", |
21454aaa | 198 | &entry->ctrl_info.in_dst_ip); |
1da177e4 LT |
199 | |
200 | if (entry->prev != NULL) | |
201 | entry->prev->next = entry->next; | |
202 | else | |
203 | client->in_cache = entry->next; | |
204 | if (entry->next != NULL) | |
205 | entry->next->prev = entry->prev; | |
206 | client->in_ops->put(entry); | |
bee67d34 | 207 | if (client->in_cache == NULL && client->eg_cache == NULL) { |
1da177e4 | 208 | msg.type = STOP_KEEP_ALIVE_SM; |
bee67d34 | 209 | msg_to_mpoad(&msg, client); |
1da177e4 LT |
210 | } |
211 | ||
212 | /* Check if the egress side still uses this VCC */ | |
213 | if (vcc != NULL) { | |
bee67d34 JP |
214 | eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc, |
215 | client); | |
1da177e4 LT |
216 | if (eg_entry != NULL) { |
217 | client->eg_ops->put(eg_entry); | |
218 | return; | |
219 | } | |
220 | vcc_release_async(vcc, -EPIPE); | |
221 | } | |
1da177e4 LT |
222 | } |
223 | ||
1da177e4 LT |
224 | /* Call this every MPC-p2 seconds... Not exactly correct solution, |
225 | but an easy one... */ | |
226 | static void clear_count_and_expired(struct mpoa_client *client) | |
227 | { | |
1da177e4 | 228 | in_cache_entry *entry, *next_entry; |
d750dbdc | 229 | time64_t now; |
1da177e4 | 230 | |
d750dbdc | 231 | now = ktime_get_seconds(); |
1da177e4 LT |
232 | |
233 | write_lock_bh(&client->ingress_lock); | |
234 | entry = client->in_cache; | |
bee67d34 JP |
235 | while (entry != NULL) { |
236 | entry->count = 0; | |
1da177e4 | 237 | next_entry = entry->next; |
d750dbdc | 238 | if ((now - entry->time) > entry->ctrl_info.holding_time) { |
b50c2ea7 | 239 | dprintk("holding time expired, ip = %pI4\n", |
21454aaa | 240 | &entry->ctrl_info.in_dst_ip); |
1da177e4 LT |
241 | client->in_ops->remove_entry(entry, client); |
242 | } | |
243 | entry = next_entry; | |
244 | } | |
245 | write_unlock_bh(&client->ingress_lock); | |
1da177e4 LT |
246 | } |
247 | ||
248 | /* Call this every MPC-p4 seconds. */ | |
249 | static void check_resolving_entries(struct mpoa_client *client) | |
250 | { | |
251 | ||
252 | struct atm_mpoa_qos *qos; | |
253 | in_cache_entry *entry; | |
d750dbdc | 254 | time64_t now; |
1da177e4 LT |
255 | struct k_message msg; |
256 | ||
d750dbdc | 257 | now = ktime_get_seconds(); |
1da177e4 LT |
258 | |
259 | read_lock_bh(&client->ingress_lock); | |
260 | entry = client->in_cache; | |
bee67d34 JP |
261 | while (entry != NULL) { |
262 | if (entry->entry_state == INGRESS_RESOLVING) { | |
d750dbdc TR |
263 | |
264 | if ((now - entry->hold_down) | |
265 | < client->parameters.mpc_p6) { | |
bee67d34 | 266 | entry = entry->next; /* Entry in hold down */ |
1da177e4 LT |
267 | continue; |
268 | } | |
d750dbdc | 269 | if ((now - entry->reply_wait) > entry->retry_time) { |
bee67d34 JP |
270 | entry->retry_time = MPC_C1 * (entry->retry_time); |
271 | /* | |
272 | * Retry time maximum exceeded, | |
273 | * put entry in hold down. | |
274 | */ | |
275 | if (entry->retry_time > client->parameters.mpc_p5) { | |
d750dbdc | 276 | entry->hold_down = ktime_get_seconds(); |
1da177e4 LT |
277 | entry->retry_time = client->parameters.mpc_p4; |
278 | entry = entry->next; | |
279 | continue; | |
280 | } | |
281 | /* Ask daemon to send a resolution request. */ | |
d750dbdc | 282 | memset(&entry->hold_down, 0, sizeof(time64_t)); |
1da177e4 LT |
283 | msg.type = SND_MPOA_RES_RTRY; |
284 | memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN); | |
285 | msg.content.in_info = entry->ctrl_info; | |
286 | qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); | |
bee67d34 JP |
287 | if (qos != NULL) |
288 | msg.qos = qos->qos; | |
1da177e4 | 289 | msg_to_mpoad(&msg, client); |
d750dbdc | 290 | entry->reply_wait = ktime_get_seconds(); |
1da177e4 LT |
291 | } |
292 | } | |
293 | entry = entry->next; | |
294 | } | |
295 | read_unlock_bh(&client->ingress_lock); | |
296 | } | |
297 | ||
298 | /* Call this every MPC-p5 seconds. */ | |
299 | static void refresh_entries(struct mpoa_client *client) | |
300 | { | |
d750dbdc | 301 | time64_t now; |
1da177e4 LT |
302 | struct in_cache_entry *entry = client->in_cache; |
303 | ||
b50c2ea7 | 304 | ddprintk("refresh_entries\n"); |
d750dbdc | 305 | now = ktime_get_seconds(); |
1da177e4 LT |
306 | |
307 | read_lock_bh(&client->ingress_lock); | |
bee67d34 JP |
308 | while (entry != NULL) { |
309 | if (entry->entry_state == INGRESS_RESOLVED) { | |
310 | if (!(entry->refresh_time)) | |
311 | entry->refresh_time = (2 * (entry->ctrl_info.holding_time))/3; | |
d750dbdc | 312 | if ((now - entry->reply_wait) > |
bee67d34 | 313 | entry->refresh_time) { |
b50c2ea7 | 314 | dprintk("refreshing an entry.\n"); |
1da177e4 LT |
315 | entry->entry_state = INGRESS_REFRESHING; |
316 | ||
317 | } | |
318 | } | |
319 | entry = entry->next; | |
320 | } | |
321 | read_unlock_bh(&client->ingress_lock); | |
322 | } | |
323 | ||
324 | static void in_destroy_cache(struct mpoa_client *mpc) | |
325 | { | |
326 | write_lock_irq(&mpc->ingress_lock); | |
bee67d34 | 327 | while (mpc->in_cache != NULL) |
1da177e4 LT |
328 | mpc->in_ops->remove_entry(mpc->in_cache, mpc); |
329 | write_unlock_irq(&mpc->ingress_lock); | |
1da177e4 LT |
330 | } |
331 | ||
bee67d34 JP |
332 | static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id, |
333 | struct mpoa_client *mpc) | |
1da177e4 LT |
334 | { |
335 | eg_cache_entry *entry; | |
336 | ||
337 | read_lock_irq(&mpc->egress_lock); | |
338 | entry = mpc->eg_cache; | |
bee67d34 JP |
339 | while (entry != NULL) { |
340 | if (entry->ctrl_info.cache_id == cache_id) { | |
e00bdbef | 341 | refcount_inc(&entry->use); |
1da177e4 LT |
342 | read_unlock_irq(&mpc->egress_lock); |
343 | return entry; | |
344 | } | |
345 | entry = entry->next; | |
346 | } | |
347 | read_unlock_irq(&mpc->egress_lock); | |
348 | ||
349 | return NULL; | |
350 | } | |
351 | ||
352 | /* This can be called from any context since it saves CPU flags */ | |
30d492da | 353 | static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc) |
1da177e4 LT |
354 | { |
355 | unsigned long flags; | |
356 | eg_cache_entry *entry; | |
357 | ||
358 | read_lock_irqsave(&mpc->egress_lock, flags); | |
359 | entry = mpc->eg_cache; | |
bee67d34 | 360 | while (entry != NULL) { |
1da177e4 | 361 | if (entry->ctrl_info.tag == tag) { |
e00bdbef | 362 | refcount_inc(&entry->use); |
1da177e4 LT |
363 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
364 | return entry; | |
365 | } | |
366 | entry = entry->next; | |
367 | } | |
368 | read_unlock_irqrestore(&mpc->egress_lock, flags); | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
373 | /* This can be called from any context since it saves CPU flags */ | |
bee67d34 JP |
374 | static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc, |
375 | struct mpoa_client *mpc) | |
1da177e4 LT |
376 | { |
377 | unsigned long flags; | |
378 | eg_cache_entry *entry; | |
379 | ||
380 | read_lock_irqsave(&mpc->egress_lock, flags); | |
381 | entry = mpc->eg_cache; | |
bee67d34 | 382 | while (entry != NULL) { |
1da177e4 | 383 | if (entry->shortcut == vcc) { |
e00bdbef | 384 | refcount_inc(&entry->use); |
f7d57453 | 385 | read_unlock_irqrestore(&mpc->egress_lock, flags); |
1da177e4 LT |
386 | return entry; |
387 | } | |
388 | entry = entry->next; | |
389 | } | |
390 | read_unlock_irqrestore(&mpc->egress_lock, flags); | |
391 | ||
392 | return NULL; | |
393 | } | |
394 | ||
bee67d34 JP |
395 | static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr, |
396 | struct mpoa_client *mpc) | |
1da177e4 LT |
397 | { |
398 | eg_cache_entry *entry; | |
399 | ||
400 | read_lock_irq(&mpc->egress_lock); | |
401 | entry = mpc->eg_cache; | |
bee67d34 JP |
402 | while (entry != NULL) { |
403 | if (entry->latest_ip_addr == ipaddr) { | |
e00bdbef | 404 | refcount_inc(&entry->use); |
f7d57453 | 405 | read_unlock_irq(&mpc->egress_lock); |
1da177e4 LT |
406 | return entry; |
407 | } | |
408 | entry = entry->next; | |
409 | } | |
410 | read_unlock_irq(&mpc->egress_lock); | |
411 | ||
412 | return NULL; | |
413 | } | |
414 | ||
415 | static void eg_cache_put(eg_cache_entry *entry) | |
416 | { | |
e00bdbef | 417 | if (refcount_dec_and_test(&entry->use)) { |
453431a5 | 418 | kfree_sensitive(entry); |
1da177e4 | 419 | } |
1da177e4 LT |
420 | } |
421 | ||
422 | /* | |
423 | * This should be called with write lock on | |
424 | */ | |
425 | static void eg_cache_remove_entry(eg_cache_entry *entry, | |
426 | struct mpoa_client *client) | |
427 | { | |
428 | struct atm_vcc *vcc; | |
429 | struct k_message msg; | |
430 | ||
431 | vcc = entry->shortcut; | |
b50c2ea7 | 432 | dprintk("removing an egress entry.\n"); |
1da177e4 LT |
433 | if (entry->prev != NULL) |
434 | entry->prev->next = entry->next; | |
435 | else | |
436 | client->eg_cache = entry->next; | |
437 | if (entry->next != NULL) | |
438 | entry->next->prev = entry->prev; | |
439 | client->eg_ops->put(entry); | |
bee67d34 | 440 | if (client->in_cache == NULL && client->eg_cache == NULL) { |
1da177e4 | 441 | msg.type = STOP_KEEP_ALIVE_SM; |
bee67d34 | 442 | msg_to_mpoad(&msg, client); |
1da177e4 LT |
443 | } |
444 | ||
445 | /* Check if the ingress side still uses this VCC */ | |
446 | if (vcc != NULL) { | |
447 | in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client); | |
448 | if (in_entry != NULL) { | |
449 | client->in_ops->put(in_entry); | |
450 | return; | |
451 | } | |
452 | vcc_release_async(vcc, -EPIPE); | |
453 | } | |
1da177e4 LT |
454 | } |
455 | ||
bee67d34 JP |
456 | static eg_cache_entry *eg_cache_add_entry(struct k_message *msg, |
457 | struct mpoa_client *client) | |
1da177e4 | 458 | { |
2afe37cd | 459 | eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL); |
1da177e4 LT |
460 | |
461 | if (entry == NULL) { | |
bee67d34 | 462 | pr_info("out of memory\n"); |
1da177e4 LT |
463 | return NULL; |
464 | } | |
465 | ||
b50c2ea7 | 466 | dprintk("adding an egress entry, ip = %pI4, this should be our IP\n", |
21454aaa | 467 | &msg->content.eg_info.eg_dst_ip); |
1da177e4 | 468 | |
e00bdbef | 469 | refcount_set(&entry->use, 1); |
b50c2ea7 | 470 | dprintk("new_eg_cache_entry: about to lock\n"); |
1da177e4 LT |
471 | write_lock_irq(&client->egress_lock); |
472 | entry->next = client->eg_cache; | |
473 | entry->prev = NULL; | |
474 | if (client->eg_cache != NULL) | |
475 | client->eg_cache->prev = entry; | |
476 | client->eg_cache = entry; | |
477 | ||
478 | memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); | |
479 | entry->ctrl_info = msg->content.eg_info; | |
d750dbdc | 480 | entry->time = ktime_get_seconds(); |
1da177e4 | 481 | entry->entry_state = EGRESS_RESOLVED; |
b50c2ea7 | 482 | dprintk("new_eg_cache_entry cache_id %u\n", |
bee67d34 | 483 | ntohl(entry->ctrl_info.cache_id)); |
b50c2ea7 | 484 | dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip); |
e00bdbef | 485 | refcount_inc(&entry->use); |
1da177e4 LT |
486 | |
487 | write_unlock_irq(&client->egress_lock); | |
b50c2ea7 | 488 | dprintk("new_eg_cache_entry: unlocked\n"); |
1da177e4 LT |
489 | |
490 | return entry; | |
491 | } | |
492 | ||
bee67d34 | 493 | static void update_eg_cache_entry(eg_cache_entry *entry, uint16_t holding_time) |
1da177e4 | 494 | { |
d750dbdc | 495 | entry->time = ktime_get_seconds(); |
1da177e4 LT |
496 | entry->entry_state = EGRESS_RESOLVED; |
497 | entry->ctrl_info.holding_time = holding_time; | |
1da177e4 LT |
498 | } |
499 | ||
500 | static void clear_expired(struct mpoa_client *client) | |
501 | { | |
502 | eg_cache_entry *entry, *next_entry; | |
d750dbdc | 503 | time64_t now; |
1da177e4 LT |
504 | struct k_message msg; |
505 | ||
d750dbdc | 506 | now = ktime_get_seconds(); |
1da177e4 LT |
507 | |
508 | write_lock_irq(&client->egress_lock); | |
509 | entry = client->eg_cache; | |
bee67d34 | 510 | while (entry != NULL) { |
1da177e4 | 511 | next_entry = entry->next; |
d750dbdc | 512 | if ((now - entry->time) > entry->ctrl_info.holding_time) { |
1da177e4 LT |
513 | msg.type = SND_EGRESS_PURGE; |
514 | msg.content.eg_info = entry->ctrl_info; | |
b50c2ea7 | 515 | dprintk("egress_cache: holding time expired, cache_id = %u.\n", |
bee67d34 | 516 | ntohl(entry->ctrl_info.cache_id)); |
1da177e4 LT |
517 | msg_to_mpoad(&msg, client); |
518 | client->eg_ops->remove_entry(entry, client); | |
519 | } | |
520 | entry = next_entry; | |
521 | } | |
522 | write_unlock_irq(&client->egress_lock); | |
1da177e4 LT |
523 | } |
524 | ||
525 | static void eg_destroy_cache(struct mpoa_client *mpc) | |
526 | { | |
527 | write_lock_irq(&mpc->egress_lock); | |
bee67d34 | 528 | while (mpc->eg_cache != NULL) |
1da177e4 LT |
529 | mpc->eg_ops->remove_entry(mpc->eg_cache, mpc); |
530 | write_unlock_irq(&mpc->egress_lock); | |
1da177e4 LT |
531 | } |
532 | ||
533 | ||
4dd191bb | 534 | static const struct in_cache_ops ingress_ops = { |
99a5e178 KC |
535 | .add_entry = in_cache_add_entry, |
536 | .get = in_cache_get, | |
537 | .get_with_mask = in_cache_get_with_mask, | |
538 | .get_by_vcc = in_cache_get_by_vcc, | |
539 | .put = in_cache_put, | |
540 | .remove_entry = in_cache_remove_entry, | |
541 | .cache_hit = cache_hit, | |
542 | .clear_count = clear_count_and_expired, | |
543 | .check_resolving = check_resolving_entries, | |
544 | .refresh = refresh_entries, | |
545 | .destroy_cache = in_destroy_cache | |
1da177e4 LT |
546 | }; |
547 | ||
4dd191bb | 548 | static const struct eg_cache_ops egress_ops = { |
99a5e178 KC |
549 | .add_entry = eg_cache_add_entry, |
550 | .get_by_cache_id = eg_cache_get_by_cache_id, | |
551 | .get_by_tag = eg_cache_get_by_tag, | |
552 | .get_by_vcc = eg_cache_get_by_vcc, | |
553 | .get_by_src_ip = eg_cache_get_by_src_ip, | |
554 | .put = eg_cache_put, | |
555 | .remove_entry = eg_cache_remove_entry, | |
556 | .update = update_eg_cache_entry, | |
557 | .clear_expired = clear_expired, | |
558 | .destroy_cache = eg_destroy_cache | |
1da177e4 LT |
559 | }; |
560 | ||
1da177e4 LT |
561 | void atm_mpoa_init_cache(struct mpoa_client *mpc) |
562 | { | |
563 | mpc->in_ops = &ingress_ops; | |
564 | mpc->eg_ops = &egress_ops; | |
1da177e4 | 565 | } |