blob: 9e60e74c807d961bf9eab2d439eb6ffa95599007 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/types.h>
2#include <linux/atmmpc.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09003#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07004#include <linux/time.h>
5
6#include "mpoa_caches.h"
7#include "mpc.h"
8
9/*
10 * mpoa_caches.c: Implementation of ingress and egress cache
11 * handling functions
12 */
13
14#if 0
Joe Perchesb50c2ea2010-01-26 11:40:20 +000015#define dprintk(format, args...) \
16 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#else
Joe Perchesb50c2ea2010-01-26 11:40:20 +000018#define dprintk(format, args...) \
19 do { if (0) \
20 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
21 } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#endif
23
24#if 0
Joe Perchesb50c2ea2010-01-26 11:40:20 +000025#define ddprintk(format, args...) \
26 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args) /* debug */
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#else
Joe Perchesb50c2ea2010-01-26 11:40:20 +000028#define ddprintk(format, args...) \
29 do { if (0) \
30 printk(KERN_DEBUG "mpoa:%s: " format, __FILE__, ##args);\
31 } while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#endif
33
Al Viro30d492d2006-11-14 21:11:29 -080034static in_cache_entry *in_cache_get(__be32 dst_ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 struct mpoa_client *client)
36{
37 in_cache_entry *entry;
38
39 read_lock_bh(&client->ingress_lock);
40 entry = client->in_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +000041 while (entry != NULL) {
42 if (entry->ctrl_info.in_dst_ip == dst_ip) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 atomic_inc(&entry->use);
44 read_unlock_bh(&client->ingress_lock);
45 return entry;
46 }
47 entry = entry->next;
48 }
49 read_unlock_bh(&client->ingress_lock);
50
51 return NULL;
52}
53
Al Viro30d492d2006-11-14 21:11:29 -080054static in_cache_entry *in_cache_get_with_mask(__be32 dst_ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 struct mpoa_client *client,
Al Viro30d492d2006-11-14 21:11:29 -080056 __be32 mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -070057{
58 in_cache_entry *entry;
59
60 read_lock_bh(&client->ingress_lock);
61 entry = client->in_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +000062 while (entry != NULL) {
63 if ((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 atomic_inc(&entry->use);
65 read_unlock_bh(&client->ingress_lock);
66 return entry;
67 }
68 entry = entry->next;
69 }
70 read_unlock_bh(&client->ingress_lock);
71
72 return NULL;
73
74}
75
76static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc,
Joe Perchesbee67d32010-01-26 11:40:10 +000077 struct mpoa_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -070078{
79 in_cache_entry *entry;
80
81 read_lock_bh(&client->ingress_lock);
82 entry = client->in_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +000083 while (entry != NULL) {
84 if (entry->shortcut == vcc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 atomic_inc(&entry->use);
86 read_unlock_bh(&client->ingress_lock);
87 return entry;
88 }
89 entry = entry->next;
90 }
91 read_unlock_bh(&client->ingress_lock);
92
93 return NULL;
94}
95
Al Viro30d492d2006-11-14 21:11:29 -080096static in_cache_entry *in_cache_add_entry(__be32 dst_ip,
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 struct mpoa_client *client)
98{
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -020099 in_cache_entry *entry = kzalloc(sizeof(in_cache_entry), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101 if (entry == NULL) {
Joe Perchesbee67d32010-01-26 11:40:10 +0000102 pr_info("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 return NULL;
104 }
105
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000106 dprintk("adding an ingress entry, ip = %pI4\n", &dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108 atomic_set(&entry->use, 1);
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000109 dprintk("new_in_cache_entry: about to lock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 write_lock_bh(&client->ingress_lock);
111 entry->next = client->in_cache;
112 entry->prev = NULL;
113 if (client->in_cache != NULL)
114 client->in_cache->prev = entry;
115 client->in_cache = entry;
116
117 memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
118 entry->ctrl_info.in_dst_ip = dst_ip;
119 do_gettimeofday(&(entry->tv));
120 entry->retry_time = client->parameters.mpc_p4;
121 entry->count = 1;
122 entry->entry_state = INGRESS_INVALID;
123 entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT;
124 atomic_inc(&entry->use);
125
126 write_unlock_bh(&client->ingress_lock);
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000127 dprintk("new_in_cache_entry: unlocked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129 return entry;
130}
131
132static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
133{
134 struct atm_mpoa_qos *qos;
135 struct k_message msg;
136
137 entry->count++;
Joe Perchesbee67d32010-01-26 11:40:10 +0000138 if (entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 return OPEN;
140
Joe Perchesbee67d32010-01-26 11:40:10 +0000141 if (entry->entry_state == INGRESS_REFRESHING) {
142 if (entry->count > mpc->parameters.mpc_p1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 msg.type = SND_MPOA_RES_RQST;
144 msg.content.in_info = entry->ctrl_info;
145 memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
146 qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
Joe Perchesbee67d32010-01-26 11:40:10 +0000147 if (qos != NULL)
148 msg.qos = qos->qos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 msg_to_mpoad(&msg, mpc);
150 do_gettimeofday(&(entry->reply_wait));
151 entry->entry_state = INGRESS_RESOLVING;
152 }
Joe Perchesbee67d32010-01-26 11:40:10 +0000153 if (entry->shortcut != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 return OPEN;
155 return CLOSED;
156 }
157
Joe Perchesbee67d32010-01-26 11:40:10 +0000158 if (entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return OPEN;
160
Joe Perchesbee67d32010-01-26 11:40:10 +0000161 if (entry->count > mpc->parameters.mpc_p1 &&
162 entry->entry_state == INGRESS_INVALID) {
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000163 dprintk("(%s) threshold exceeded for ip %pI4, sending MPOA res req\n",
Harvey Harrison21454aa2008-10-31 00:54:56 -0700164 mpc->dev->name, &entry->ctrl_info.in_dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 entry->entry_state = INGRESS_RESOLVING;
Joe Perchesbee67d32010-01-26 11:40:10 +0000166 msg.type = SND_MPOA_RES_RQST;
167 memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 msg.content.in_info = entry->ctrl_info;
169 qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
Joe Perchesbee67d32010-01-26 11:40:10 +0000170 if (qos != NULL)
171 msg.qos = qos->qos;
172 msg_to_mpoad(&msg, mpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 do_gettimeofday(&(entry->reply_wait));
174 }
175
176 return CLOSED;
177}
178
179static void in_cache_put(in_cache_entry *entry)
180{
181 if (atomic_dec_and_test(&entry->use)) {
182 memset(entry, 0, sizeof(in_cache_entry));
183 kfree(entry);
184 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185}
186
187/*
188 * This should be called with write lock on
189 */
190static 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 vcc = entry->shortcut;
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000197 dprintk("removing an ingress entry, ip = %pI4\n",
Harvey Harrison21454aa2008-10-31 00:54:56 -0700198 &entry->ctrl_info.in_dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
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);
Joe Perchesbee67d32010-01-26 11:40:10 +0000207 if (client->in_cache == NULL && client->eg_cache == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 msg.type = STOP_KEEP_ALIVE_SM;
Joe Perchesbee67d32010-01-26 11:40:10 +0000209 msg_to_mpoad(&msg, client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 }
211
212 /* Check if the egress side still uses this VCC */
213 if (vcc != NULL) {
Joe Perchesbee67d32010-01-26 11:40:10 +0000214 eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc,
215 client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (eg_entry != NULL) {
217 client->eg_ops->put(eg_entry);
218 return;
219 }
220 vcc_release_async(vcc, -EPIPE);
221 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224/* Call this every MPC-p2 seconds... Not exactly correct solution,
225 but an easy one... */
226static void clear_count_and_expired(struct mpoa_client *client)
227{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 in_cache_entry *entry, *next_entry;
229 struct timeval now;
230
231 do_gettimeofday(&now);
232
233 write_lock_bh(&client->ingress_lock);
234 entry = client->in_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000235 while (entry != NULL) {
236 entry->count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 next_entry = entry->next;
Joe Perchesbee67d32010-01-26 11:40:10 +0000238 if ((now.tv_sec - entry->tv.tv_sec)
239 > entry->ctrl_info.holding_time) {
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000240 dprintk("holding time expired, ip = %pI4\n",
Harvey Harrison21454aa2008-10-31 00:54:56 -0700241 &entry->ctrl_info.in_dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 client->in_ops->remove_entry(entry, client);
243 }
244 entry = next_entry;
245 }
246 write_unlock_bh(&client->ingress_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247}
248
249/* Call this every MPC-p4 seconds. */
250static void check_resolving_entries(struct mpoa_client *client)
251{
252
253 struct atm_mpoa_qos *qos;
254 in_cache_entry *entry;
255 struct timeval now;
256 struct k_message msg;
257
Joe Perchesbee67d32010-01-26 11:40:10 +0000258 do_gettimeofday(&now);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 read_lock_bh(&client->ingress_lock);
261 entry = client->in_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000262 while (entry != NULL) {
263 if (entry->entry_state == INGRESS_RESOLVING) {
264 if ((now.tv_sec - entry->hold_down.tv_sec) <
265 client->parameters.mpc_p6) {
266 entry = entry->next; /* Entry in hold down */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 continue;
268 }
Joe Perchesbee67d32010-01-26 11:40:10 +0000269 if ((now.tv_sec - entry->reply_wait.tv_sec) >
270 entry->retry_time) {
271 entry->retry_time = MPC_C1 * (entry->retry_time);
272 /*
273 * Retry time maximum exceeded,
274 * put entry in hold down.
275 */
276 if (entry->retry_time > client->parameters.mpc_p5) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 do_gettimeofday(&(entry->hold_down));
278 entry->retry_time = client->parameters.mpc_p4;
279 entry = entry->next;
280 continue;
281 }
282 /* Ask daemon to send a resolution request. */
Joe Perchesbee67d32010-01-26 11:40:10 +0000283 memset(&(entry->hold_down), 0, sizeof(struct timeval));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 msg.type = SND_MPOA_RES_RTRY;
285 memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN);
286 msg.content.in_info = entry->ctrl_info;
287 qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
Joe Perchesbee67d32010-01-26 11:40:10 +0000288 if (qos != NULL)
289 msg.qos = qos->qos;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 msg_to_mpoad(&msg, client);
291 do_gettimeofday(&(entry->reply_wait));
292 }
293 }
294 entry = entry->next;
295 }
296 read_unlock_bh(&client->ingress_lock);
297}
298
299/* Call this every MPC-p5 seconds. */
300static void refresh_entries(struct mpoa_client *client)
301{
302 struct timeval now;
303 struct in_cache_entry *entry = client->in_cache;
304
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000305 ddprintk("refresh_entries\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 do_gettimeofday(&now);
307
308 read_lock_bh(&client->ingress_lock);
Joe Perchesbee67d32010-01-26 11:40:10 +0000309 while (entry != NULL) {
310 if (entry->entry_state == INGRESS_RESOLVED) {
311 if (!(entry->refresh_time))
312 entry->refresh_time = (2 * (entry->ctrl_info.holding_time))/3;
313 if ((now.tv_sec - entry->reply_wait.tv_sec) >
314 entry->refresh_time) {
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000315 dprintk("refreshing an entry.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 entry->entry_state = INGRESS_REFRESHING;
317
318 }
319 }
320 entry = entry->next;
321 }
322 read_unlock_bh(&client->ingress_lock);
323}
324
325static void in_destroy_cache(struct mpoa_client *mpc)
326{
327 write_lock_irq(&mpc->ingress_lock);
Joe Perchesbee67d32010-01-26 11:40:10 +0000328 while (mpc->in_cache != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 mpc->in_ops->remove_entry(mpc->in_cache, mpc);
330 write_unlock_irq(&mpc->ingress_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331}
332
Joe Perchesbee67d32010-01-26 11:40:10 +0000333static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id,
334 struct mpoa_client *mpc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335{
336 eg_cache_entry *entry;
337
338 read_lock_irq(&mpc->egress_lock);
339 entry = mpc->eg_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000340 while (entry != NULL) {
341 if (entry->ctrl_info.cache_id == cache_id) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 atomic_inc(&entry->use);
343 read_unlock_irq(&mpc->egress_lock);
344 return entry;
345 }
346 entry = entry->next;
347 }
348 read_unlock_irq(&mpc->egress_lock);
349
350 return NULL;
351}
352
353/* This can be called from any context since it saves CPU flags */
Al Viro30d492d2006-11-14 21:11:29 -0800354static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
356 unsigned long flags;
357 eg_cache_entry *entry;
358
359 read_lock_irqsave(&mpc->egress_lock, flags);
360 entry = mpc->eg_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000361 while (entry != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 if (entry->ctrl_info.tag == tag) {
363 atomic_inc(&entry->use);
364 read_unlock_irqrestore(&mpc->egress_lock, flags);
365 return entry;
366 }
367 entry = entry->next;
368 }
369 read_unlock_irqrestore(&mpc->egress_lock, flags);
370
371 return NULL;
372}
373
374/* This can be called from any context since it saves CPU flags */
Joe Perchesbee67d32010-01-26 11:40:10 +0000375static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc,
376 struct mpoa_client *mpc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377{
378 unsigned long flags;
379 eg_cache_entry *entry;
380
381 read_lock_irqsave(&mpc->egress_lock, flags);
382 entry = mpc->eg_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000383 while (entry != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 if (entry->shortcut == vcc) {
385 atomic_inc(&entry->use);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900386 read_unlock_irqrestore(&mpc->egress_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return entry;
388 }
389 entry = entry->next;
390 }
391 read_unlock_irqrestore(&mpc->egress_lock, flags);
392
393 return NULL;
394}
395
Joe Perchesbee67d32010-01-26 11:40:10 +0000396static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr,
397 struct mpoa_client *mpc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398{
399 eg_cache_entry *entry;
400
401 read_lock_irq(&mpc->egress_lock);
402 entry = mpc->eg_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000403 while (entry != NULL) {
404 if (entry->latest_ip_addr == ipaddr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 atomic_inc(&entry->use);
YOSHIFUJI Hideakif7d57452007-02-09 23:24:29 +0900406 read_unlock_irq(&mpc->egress_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 return entry;
408 }
409 entry = entry->next;
410 }
411 read_unlock_irq(&mpc->egress_lock);
412
413 return NULL;
414}
415
416static void eg_cache_put(eg_cache_entry *entry)
417{
418 if (atomic_dec_and_test(&entry->use)) {
419 memset(entry, 0, sizeof(eg_cache_entry));
420 kfree(entry);
421 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422}
423
424/*
425 * This should be called with write lock on
426 */
427static void eg_cache_remove_entry(eg_cache_entry *entry,
428 struct mpoa_client *client)
429{
430 struct atm_vcc *vcc;
431 struct k_message msg;
432
433 vcc = entry->shortcut;
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000434 dprintk("removing an egress entry.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 if (entry->prev != NULL)
436 entry->prev->next = entry->next;
437 else
438 client->eg_cache = entry->next;
439 if (entry->next != NULL)
440 entry->next->prev = entry->prev;
441 client->eg_ops->put(entry);
Joe Perchesbee67d32010-01-26 11:40:10 +0000442 if (client->in_cache == NULL && client->eg_cache == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 msg.type = STOP_KEEP_ALIVE_SM;
Joe Perchesbee67d32010-01-26 11:40:10 +0000444 msg_to_mpoad(&msg, client);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 }
446
447 /* Check if the ingress side still uses this VCC */
448 if (vcc != NULL) {
449 in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client);
450 if (in_entry != NULL) {
451 client->in_ops->put(in_entry);
452 return;
453 }
454 vcc_release_async(vcc, -EPIPE);
455 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456}
457
Joe Perchesbee67d32010-01-26 11:40:10 +0000458static eg_cache_entry *eg_cache_add_entry(struct k_message *msg,
459 struct mpoa_client *client)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460{
Arnaldo Carvalho de Melo2afe37c2006-11-21 01:14:33 -0200461 eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462
463 if (entry == NULL) {
Joe Perchesbee67d32010-01-26 11:40:10 +0000464 pr_info("out of memory\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 return NULL;
466 }
467
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000468 dprintk("adding an egress entry, ip = %pI4, this should be our IP\n",
Harvey Harrison21454aa2008-10-31 00:54:56 -0700469 &msg->content.eg_info.eg_dst_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 atomic_set(&entry->use, 1);
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000472 dprintk("new_eg_cache_entry: about to lock\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 write_lock_irq(&client->egress_lock);
474 entry->next = client->eg_cache;
475 entry->prev = NULL;
476 if (client->eg_cache != NULL)
477 client->eg_cache->prev = entry;
478 client->eg_cache = entry;
479
480 memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
481 entry->ctrl_info = msg->content.eg_info;
482 do_gettimeofday(&(entry->tv));
483 entry->entry_state = EGRESS_RESOLVED;
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000484 dprintk("new_eg_cache_entry cache_id %u\n",
Joe Perchesbee67d32010-01-26 11:40:10 +0000485 ntohl(entry->ctrl_info.cache_id));
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000486 dprintk("mps_ip = %pI4\n", &entry->ctrl_info.mps_ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 atomic_inc(&entry->use);
488
489 write_unlock_irq(&client->egress_lock);
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000490 dprintk("new_eg_cache_entry: unlocked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 return entry;
493}
494
Joe Perchesbee67d32010-01-26 11:40:10 +0000495static void update_eg_cache_entry(eg_cache_entry *entry, uint16_t holding_time)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496{
497 do_gettimeofday(&(entry->tv));
498 entry->entry_state = EGRESS_RESOLVED;
499 entry->ctrl_info.holding_time = holding_time;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500}
501
502static void clear_expired(struct mpoa_client *client)
503{
504 eg_cache_entry *entry, *next_entry;
505 struct timeval now;
506 struct k_message msg;
507
508 do_gettimeofday(&now);
509
510 write_lock_irq(&client->egress_lock);
511 entry = client->eg_cache;
Joe Perchesbee67d32010-01-26 11:40:10 +0000512 while (entry != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 next_entry = entry->next;
Joe Perchesbee67d32010-01-26 11:40:10 +0000514 if ((now.tv_sec - entry->tv.tv_sec)
515 > entry->ctrl_info.holding_time) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 msg.type = SND_EGRESS_PURGE;
517 msg.content.eg_info = entry->ctrl_info;
Joe Perchesb50c2ea2010-01-26 11:40:20 +0000518 dprintk("egress_cache: holding time expired, cache_id = %u.\n",
Joe Perchesbee67d32010-01-26 11:40:10 +0000519 ntohl(entry->ctrl_info.cache_id));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520 msg_to_mpoad(&msg, client);
521 client->eg_ops->remove_entry(entry, client);
522 }
523 entry = next_entry;
524 }
525 write_unlock_irq(&client->egress_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526}
527
528static void eg_destroy_cache(struct mpoa_client *mpc)
529{
530 write_lock_irq(&mpc->egress_lock);
Joe Perchesbee67d32010-01-26 11:40:10 +0000531 while (mpc->eg_cache != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 mpc->eg_ops->remove_entry(mpc->eg_cache, mpc);
533 write_unlock_irq(&mpc->egress_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534}
535
536
Julia Lawall4dd191b2015-11-21 18:28:05 +0100537static const struct in_cache_ops ingress_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 in_cache_add_entry, /* add_entry */
539 in_cache_get, /* get */
540 in_cache_get_with_mask, /* get_with_mask */
541 in_cache_get_by_vcc, /* get_by_vcc */
542 in_cache_put, /* put */
543 in_cache_remove_entry, /* remove_entry */
544 cache_hit, /* cache_hit */
545 clear_count_and_expired, /* clear_count */
546 check_resolving_entries, /* check_resolving */
547 refresh_entries, /* refresh */
548 in_destroy_cache /* destroy_cache */
549};
550
Julia Lawall4dd191b2015-11-21 18:28:05 +0100551static const struct eg_cache_ops egress_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 eg_cache_add_entry, /* add_entry */
553 eg_cache_get_by_cache_id, /* get_by_cache_id */
554 eg_cache_get_by_tag, /* get_by_tag */
555 eg_cache_get_by_vcc, /* get_by_vcc */
556 eg_cache_get_by_src_ip, /* get_by_src_ip */
557 eg_cache_put, /* put */
558 eg_cache_remove_entry, /* remove_entry */
559 update_eg_cache_entry, /* update */
560 clear_expired, /* clear_expired */
561 eg_destroy_cache /* destroy_cache */
562};
563
564
565void atm_mpoa_init_cache(struct mpoa_client *mpc)
566{
567 mpc->in_ops = &ingress_ops;
568 mpc->eg_ops = &egress_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569}