Commit | Line | Data |
---|---|---|
99824461 JP |
1 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
2 | ||
1da177e4 LT |
3 | #include <linux/kernel.h> |
4 | #include <linux/string.h> | |
5 | #include <linux/timer.h> | |
6 | #include <linux/init.h> | |
7 | #include <linux/bitops.h> | |
4fc268d2 | 8 | #include <linux/capability.h> |
1da177e4 LT |
9 | #include <linux/seq_file.h> |
10 | ||
11 | /* We are an ethernet device */ | |
12 | #include <linux/if_ether.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/etherdevice.h> | |
15 | #include <net/sock.h> | |
16 | #include <linux/skbuff.h> | |
17 | #include <linux/ip.h> | |
57100440 | 18 | #include <linux/uaccess.h> |
1da177e4 | 19 | #include <asm/byteorder.h> |
1da177e4 LT |
20 | #include <net/checksum.h> /* for ip_fast_csum() */ |
21 | #include <net/arp.h> | |
22 | #include <net/dst.h> | |
23 | #include <linux/proc_fs.h> | |
24 | ||
25 | /* And atm device */ | |
26 | #include <linux/atmdev.h> | |
27 | #include <linux/atmlec.h> | |
28 | #include <linux/atmmpc.h> | |
29 | /* Modular too */ | |
1da177e4 LT |
30 | #include <linux/module.h> |
31 | ||
32 | #include "lec.h" | |
33 | #include "mpc.h" | |
34 | #include "resources.h" | |
35 | ||
36 | /* | |
f7d57453 | 37 | * mpc.c: Implementation of MPOA client kernel part |
1da177e4 LT |
38 | */ |
39 | ||
40 | #if 0 | |
b50c2ea7 JP |
41 | #define dprintk(format, args...) \ |
42 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args) | |
43 | #define dprintk_cont(format, args...) printk(KERN_CONT format, ##args) | |
1da177e4 | 44 | #else |
b50c2ea7 JP |
45 | #define dprintk(format, args...) \ |
46 | do { if (0) \ | |
47 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\ | |
48 | } while (0) | |
49 | #define dprintk_cont(format, args...) \ | |
50 | do { if (0) printk(KERN_CONT format, ##args); } while (0) | |
1da177e4 LT |
51 | #endif |
52 | ||
53 | #if 0 | |
b50c2ea7 JP |
54 | #define ddprintk(format, args...) \ |
55 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args) | |
56 | #define ddprintk_cont(format, args...) printk(KERN_CONT format, ##args) | |
1da177e4 | 57 | #else |
b50c2ea7 JP |
58 | #define ddprintk(format, args...) \ |
59 | do { if (0) \ | |
60 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\ | |
61 | } while (0) | |
62 | #define ddprintk_cont(format, args...) \ | |
63 | do { if (0) printk(KERN_CONT format, ##args); } while (0) | |
1da177e4 LT |
64 | #endif |
65 | ||
1da177e4 LT |
66 | #define MPOA_TAG_LEN 4 |
67 | ||
68 | /* mpc_daemon -> kernel */ | |
57100440 | 69 | static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
1da177e4 LT |
70 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
71 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); | |
72 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); | |
73 | static void mps_death(struct k_message *msg, struct mpoa_client *mpc); | |
57100440 JP |
74 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, |
75 | int action); | |
76 | static void MPOA_cache_impos_rcvd(struct k_message *msg, | |
77 | struct mpoa_client *mpc); | |
78 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, | |
79 | struct mpoa_client *mpc); | |
80 | static void set_mps_mac_addr_rcvd(struct k_message *mesg, | |
81 | struct mpoa_client *mpc); | |
1da177e4 | 82 | |
cba5cbd1 DH |
83 | static const uint8_t *copy_macs(struct mpoa_client *mpc, |
84 | const uint8_t *router_mac, | |
85 | const uint8_t *tlvs, uint8_t mps_macs, | |
86 | uint8_t device_type); | |
1da177e4 LT |
87 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); |
88 | ||
cba5cbd1 | 89 | static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc); |
1da177e4 LT |
90 | static void mpoad_close(struct atm_vcc *vcc); |
91 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); | |
92 | ||
93 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); | |
3c805a22 | 94 | static netdev_tx_t mpc_send_packet(struct sk_buff *skb, |
57100440 JP |
95 | struct net_device *dev); |
96 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, | |
97 | unsigned long event, void *dev); | |
1da177e4 | 98 | static void mpc_timer_refresh(void); |
57100440 | 99 | static void mpc_cache_check(unsigned long checking_time); |
1da177e4 LT |
100 | |
101 | static struct llc_snap_hdr llc_snap_mpoa_ctrl = { | |
102 | 0xaa, 0xaa, 0x03, | |
103 | {0x00, 0x00, 0x5e}, | |
104 | {0x00, 0x03} /* For MPOA control PDUs */ | |
f7d57453 | 105 | }; |
1da177e4 LT |
106 | static struct llc_snap_hdr llc_snap_mpoa_data = { |
107 | 0xaa, 0xaa, 0x03, | |
108 | {0x00, 0x00, 0x00}, | |
109 | {0x08, 0x00} /* This is for IP PDUs only */ | |
f7d57453 | 110 | }; |
1da177e4 LT |
111 | static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { |
112 | 0xaa, 0xaa, 0x03, | |
113 | {0x00, 0x00, 0x00}, | |
114 | {0x88, 0x4c} /* This is for tagged data PDUs */ | |
f7d57453 | 115 | }; |
1da177e4 LT |
116 | |
117 | static struct notifier_block mpoa_notifier = { | |
118 | mpoa_event_listener, | |
119 | NULL, | |
120 | 0 | |
121 | }; | |
122 | ||
1da177e4 LT |
123 | struct mpoa_client *mpcs = NULL; /* FIXME */ |
124 | static struct atm_mpoa_qos *qos_head = NULL; | |
8d06afab | 125 | static DEFINE_TIMER(mpc_timer, NULL, 0, 0); |
1da177e4 LT |
126 | |
127 | ||
128 | static struct mpoa_client *find_mpc_by_itfnum(int itf) | |
129 | { | |
130 | struct mpoa_client *mpc; | |
f7d57453 | 131 | |
1da177e4 LT |
132 | mpc = mpcs; /* our global linked list */ |
133 | while (mpc != NULL) { | |
134 | if (mpc->dev_num == itf) | |
135 | return mpc; | |
f7d57453 | 136 | mpc = mpc->next; |
1da177e4 LT |
137 | } |
138 | ||
139 | return NULL; /* not found */ | |
140 | } | |
141 | ||
142 | static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) | |
143 | { | |
144 | struct mpoa_client *mpc; | |
f7d57453 | 145 | |
1da177e4 LT |
146 | mpc = mpcs; /* our global linked list */ |
147 | while (mpc != NULL) { | |
148 | if (mpc->mpoad_vcc == vcc) | |
149 | return mpc; | |
150 | mpc = mpc->next; | |
151 | } | |
152 | ||
153 | return NULL; /* not found */ | |
154 | } | |
155 | ||
156 | static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) | |
157 | { | |
158 | struct mpoa_client *mpc; | |
f7d57453 | 159 | |
1da177e4 LT |
160 | mpc = mpcs; /* our global linked list */ |
161 | while (mpc != NULL) { | |
162 | if (mpc->dev == dev) | |
163 | return mpc; | |
164 | mpc = mpc->next; | |
165 | } | |
166 | ||
167 | return NULL; /* not found */ | |
168 | } | |
169 | ||
170 | /* | |
171 | * Functions for managing QoS list | |
172 | */ | |
173 | ||
174 | /* | |
175 | * Overwrites the old entry or makes a new one. | |
176 | */ | |
30d492da | 177 | struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) |
1da177e4 LT |
178 | { |
179 | struct atm_mpoa_qos *entry; | |
180 | ||
181 | entry = atm_mpoa_search_qos(dst_ip); | |
182 | if (entry != NULL) { | |
183 | entry->qos = *qos; | |
184 | return entry; | |
185 | } | |
186 | ||
187 | entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); | |
188 | if (entry == NULL) { | |
57100440 | 189 | pr_info("mpoa: out of memory\n"); |
1da177e4 LT |
190 | return entry; |
191 | } | |
192 | ||
193 | entry->ipaddr = dst_ip; | |
194 | entry->qos = *qos; | |
195 | ||
196 | entry->next = qos_head; | |
197 | qos_head = entry; | |
198 | ||
199 | return entry; | |
200 | } | |
201 | ||
30d492da | 202 | struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) |
1da177e4 LT |
203 | { |
204 | struct atm_mpoa_qos *qos; | |
205 | ||
206 | qos = qos_head; | |
57100440 JP |
207 | while (qos) { |
208 | if (qos->ipaddr == dst_ip) | |
1da177e4 | 209 | break; |
1da177e4 LT |
210 | qos = qos->next; |
211 | } | |
212 | ||
213 | return qos; | |
f7d57453 | 214 | } |
1da177e4 LT |
215 | |
216 | /* | |
217 | * Returns 0 for failure | |
218 | */ | |
219 | int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) | |
220 | { | |
1da177e4 LT |
221 | struct atm_mpoa_qos *curr; |
222 | ||
57100440 JP |
223 | if (entry == NULL) |
224 | return 0; | |
1da177e4 LT |
225 | if (entry == qos_head) { |
226 | qos_head = qos_head->next; | |
227 | kfree(entry); | |
228 | return 1; | |
229 | } | |
230 | ||
231 | curr = qos_head; | |
232 | while (curr != NULL) { | |
233 | if (curr->next == entry) { | |
234 | curr->next = entry->next; | |
235 | kfree(entry); | |
236 | return 1; | |
237 | } | |
238 | curr = curr->next; | |
239 | } | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | /* this is buggered - we need locking for qos_head */ | |
245 | void atm_mpoa_disp_qos(struct seq_file *m) | |
246 | { | |
1da177e4 LT |
247 | struct atm_mpoa_qos *qos; |
248 | ||
249 | qos = qos_head; | |
250 | seq_printf(m, "QoS entries for shortcuts:\n"); | |
251 | seq_printf(m, "IP address\n TX:max_pcr pcr min_pcr max_cdv max_sdu\n RX:max_pcr pcr min_pcr max_cdv max_sdu\n"); | |
252 | ||
1da177e4 | 253 | while (qos != NULL) { |
21454aaa | 254 | seq_printf(m, "%pI4\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", |
57100440 JP |
255 | &qos->ipaddr, |
256 | qos->qos.txtp.max_pcr, | |
257 | qos->qos.txtp.pcr, | |
258 | qos->qos.txtp.min_pcr, | |
259 | qos->qos.txtp.max_cdv, | |
260 | qos->qos.txtp.max_sdu, | |
261 | qos->qos.rxtp.max_pcr, | |
262 | qos->qos.rxtp.pcr, | |
263 | qos->qos.rxtp.min_pcr, | |
264 | qos->qos.rxtp.max_cdv, | |
265 | qos->qos.rxtp.max_sdu); | |
1da177e4 LT |
266 | qos = qos->next; |
267 | } | |
268 | } | |
269 | ||
270 | static struct net_device *find_lec_by_itfnum(int itf) | |
271 | { | |
272 | struct net_device *dev; | |
273 | char name[IFNAMSIZ]; | |
274 | ||
275 | sprintf(name, "lec%d", itf); | |
881d966b | 276 | dev = dev_get_by_name(&init_net, name); |
f7d57453 | 277 | |
1da177e4 LT |
278 | return dev; |
279 | } | |
280 | ||
281 | static struct mpoa_client *alloc_mpc(void) | |
282 | { | |
283 | struct mpoa_client *mpc; | |
284 | ||
57100440 | 285 | mpc = kzalloc(sizeof(struct mpoa_client), GFP_KERNEL); |
1da177e4 LT |
286 | if (mpc == NULL) |
287 | return NULL; | |
1da177e4 LT |
288 | rwlock_init(&mpc->ingress_lock); |
289 | rwlock_init(&mpc->egress_lock); | |
290 | mpc->next = mpcs; | |
291 | atm_mpoa_init_cache(mpc); | |
292 | ||
293 | mpc->parameters.mpc_p1 = MPC_P1; | |
294 | mpc->parameters.mpc_p2 = MPC_P2; | |
57100440 | 295 | memset(mpc->parameters.mpc_p3, 0, sizeof(mpc->parameters.mpc_p3)); |
1da177e4 | 296 | mpc->parameters.mpc_p4 = MPC_P4; |
f7d57453 | 297 | mpc->parameters.mpc_p5 = MPC_P5; |
1da177e4 | 298 | mpc->parameters.mpc_p6 = MPC_P6; |
f7d57453 | 299 | |
1da177e4 | 300 | mpcs = mpc; |
f7d57453 | 301 | |
1da177e4 LT |
302 | return mpc; |
303 | } | |
304 | ||
305 | /* | |
306 | * | |
307 | * start_mpc() puts the MPC on line. All the packets destined | |
f7d57453 | 308 | * to the lec underneath us are now being monitored and |
1da177e4 LT |
309 | * shortcuts will be established. |
310 | * | |
311 | */ | |
312 | static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) | |
313 | { | |
f7d57453 | 314 | |
b50c2ea7 | 315 | dprintk("(%s)\n", mpc->dev->name); |
788dee0a | 316 | if (!dev->netdev_ops) |
57100440 | 317 | pr_info("(%s) not starting\n", dev->name); |
788dee0a SH |
318 | else { |
319 | mpc->old_ops = dev->netdev_ops; | |
320 | mpc->new_ops = *mpc->old_ops; | |
321 | mpc->new_ops.ndo_start_xmit = mpc_send_packet; | |
322 | dev->netdev_ops = &mpc->new_ops; | |
1da177e4 | 323 | } |
1da177e4 LT |
324 | } |
325 | ||
326 | static void stop_mpc(struct mpoa_client *mpc) | |
327 | { | |
788dee0a | 328 | struct net_device *dev = mpc->dev; |
b50c2ea7 | 329 | dprintk("(%s)", mpc->dev->name); |
1da177e4 LT |
330 | |
331 | /* Lets not nullify lec device's dev->hard_start_xmit */ | |
788dee0a | 332 | if (dev->netdev_ops != &mpc->new_ops) { |
b50c2ea7 | 333 | dprintk_cont(" mpc already stopped, not fatal\n"); |
1da177e4 LT |
334 | return; |
335 | } | |
b50c2ea7 | 336 | dprintk_cont("\n"); |
f7d57453 | 337 | |
788dee0a SH |
338 | dev->netdev_ops = mpc->old_ops; |
339 | mpc->old_ops = NULL; | |
340 | ||
341 | /* close_shortcuts(mpc); ??? FIXME */ | |
1da177e4 LT |
342 | } |
343 | ||
344 | static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); | |
345 | ||
346 | static const char *mpoa_device_type_string(char type) | |
347 | { | |
57100440 | 348 | switch (type) { |
1da177e4 LT |
349 | case NON_MPOA: |
350 | return "non-MPOA device"; | |
1da177e4 LT |
351 | case MPS: |
352 | return "MPS"; | |
1da177e4 LT |
353 | case MPC: |
354 | return "MPC"; | |
1da177e4 LT |
355 | case MPS_AND_MPC: |
356 | return "both MPS and MPC"; | |
1da177e4 LT |
357 | } |
358 | ||
57100440 | 359 | return "unspecified (non-MPOA) device"; |
1da177e4 LT |
360 | } |
361 | ||
362 | /* | |
b74ca3a8 WC |
363 | * lec device calls this via its netdev_priv(dev)->lane2_ops |
364 | * ->associate_indicator() when it sees a TLV in LE_ARP packet. | |
1da177e4 LT |
365 | * We fill in the pointer above when we see a LANE2 lec initializing |
366 | * See LANE2 spec 3.1.5 | |
367 | * | |
368 | * Quite a big and ugly function but when you look at it | |
369 | * all it does is to try to locate and parse MPOA Device | |
370 | * Type TLV. | |
371 | * We give our lec a pointer to this function and when the | |
372 | * lec sees a TLV it uses the pointer to call this function. | |
373 | * | |
374 | */ | |
cba5cbd1 DH |
375 | static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr, |
376 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 LT |
377 | { |
378 | uint32_t type; | |
379 | uint8_t length, mpoa_device_type, number_of_mps_macs; | |
cba5cbd1 | 380 | const uint8_t *end_of_tlvs; |
1da177e4 | 381 | struct mpoa_client *mpc; |
f7d57453 | 382 | |
1da177e4 | 383 | mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ |
b50c2ea7 | 384 | dprintk("(%s) received TLV(s), ", dev->name); |
1da177e4 LT |
385 | dprintk("total length of all TLVs %d\n", sizeoftlvs); |
386 | mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ | |
387 | if (mpc == NULL) { | |
57100440 | 388 | pr_info("(%s) no mpc\n", dev->name); |
1da177e4 LT |
389 | return; |
390 | } | |
391 | end_of_tlvs = tlvs + sizeoftlvs; | |
392 | while (end_of_tlvs - tlvs >= 5) { | |
57100440 JP |
393 | type = ((tlvs[0] << 24) | (tlvs[1] << 16) | |
394 | (tlvs[2] << 8) | tlvs[3]); | |
1da177e4 LT |
395 | length = tlvs[4]; |
396 | tlvs += 5; | |
397 | dprintk(" type 0x%x length %02x\n", type, length); | |
398 | if (tlvs + length > end_of_tlvs) { | |
57100440 | 399 | pr_info("TLV value extends past its buffer, aborting parse\n"); |
1da177e4 LT |
400 | return; |
401 | } | |
f7d57453 | 402 | |
1da177e4 | 403 | if (type == 0) { |
57100440 JP |
404 | pr_info("mpoa: (%s) TLV type was 0, returning\n", |
405 | dev->name); | |
1da177e4 LT |
406 | return; |
407 | } | |
408 | ||
409 | if (type != TLV_MPOA_DEVICE_TYPE) { | |
410 | tlvs += length; | |
411 | continue; /* skip other TLVs */ | |
412 | } | |
413 | mpoa_device_type = *tlvs++; | |
414 | number_of_mps_macs = *tlvs++; | |
b50c2ea7 | 415 | dprintk("(%s) MPOA device type '%s', ", |
57100440 | 416 | dev->name, mpoa_device_type_string(mpoa_device_type)); |
1da177e4 LT |
417 | if (mpoa_device_type == MPS_AND_MPC && |
418 | length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ | |
57100440 JP |
419 | pr_info("(%s) short MPOA Device Type TLV\n", |
420 | dev->name); | |
1da177e4 LT |
421 | continue; |
422 | } | |
57100440 JP |
423 | if ((mpoa_device_type == MPS || mpoa_device_type == MPC) && |
424 | length < 22 + number_of_mps_macs*ETH_ALEN) { | |
425 | pr_info("(%s) short MPOA Device Type TLV\n", dev->name); | |
1da177e4 LT |
426 | continue; |
427 | } | |
57100440 JP |
428 | if (mpoa_device_type != MPS && |
429 | mpoa_device_type != MPS_AND_MPC) { | |
b50c2ea7 | 430 | dprintk("ignoring non-MPS device "); |
57100440 JP |
431 | if (mpoa_device_type == MPC) |
432 | tlvs += 20; | |
1da177e4 LT |
433 | continue; /* we are only interested in MPSs */ |
434 | } | |
57100440 JP |
435 | if (number_of_mps_macs == 0 && |
436 | mpoa_device_type == MPS_AND_MPC) { | |
437 | pr_info("(%s) MPS_AND_MPC has zero MACs\n", dev->name); | |
1da177e4 LT |
438 | continue; /* someone should read the spec */ |
439 | } | |
b50c2ea7 JP |
440 | dprintk_cont("this MPS has %d MAC addresses\n", |
441 | number_of_mps_macs); | |
f7d57453 | 442 | |
57100440 JP |
443 | /* |
444 | * ok, now we can go and tell our daemon | |
445 | * the control address of MPS | |
446 | */ | |
1da177e4 | 447 | send_set_mps_ctrl_addr(tlvs, mpc); |
f7d57453 | 448 | |
57100440 JP |
449 | tlvs = copy_macs(mpc, mac_addr, tlvs, |
450 | number_of_mps_macs, mpoa_device_type); | |
451 | if (tlvs == NULL) | |
452 | return; | |
1da177e4 LT |
453 | } |
454 | if (end_of_tlvs - tlvs != 0) | |
57100440 JP |
455 | pr_info("(%s) ignoring %Zd bytes of trailing TLV garbage\n", |
456 | dev->name, end_of_tlvs - tlvs); | |
1da177e4 LT |
457 | return; |
458 | } | |
459 | ||
460 | /* | |
461 | * Store at least advertizing router's MAC address | |
462 | * plus the possible MAC address(es) to mpc->mps_macs. | |
463 | * For a freshly allocated MPOA client mpc->mps_macs == 0. | |
464 | */ | |
cba5cbd1 DH |
465 | static const uint8_t *copy_macs(struct mpoa_client *mpc, |
466 | const uint8_t *router_mac, | |
467 | const uint8_t *tlvs, uint8_t mps_macs, | |
468 | uint8_t device_type) | |
1da177e4 LT |
469 | { |
470 | int num_macs; | |
471 | num_macs = (mps_macs > 1) ? mps_macs : 1; | |
472 | ||
473 | if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ | |
57100440 JP |
474 | if (mpc->number_of_mps_macs != 0) |
475 | kfree(mpc->mps_macs); | |
1da177e4 | 476 | mpc->number_of_mps_macs = 0; |
57100440 | 477 | mpc->mps_macs = kmalloc(num_macs * ETH_ALEN, GFP_KERNEL); |
1da177e4 | 478 | if (mpc->mps_macs == NULL) { |
57100440 | 479 | pr_info("(%s) out of mem\n", mpc->dev->name); |
1da177e4 LT |
480 | return NULL; |
481 | } | |
482 | } | |
483 | memcpy(mpc->mps_macs, router_mac, ETH_ALEN); | |
484 | tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; | |
485 | if (mps_macs > 0) | |
486 | memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); | |
487 | tlvs += mps_macs*ETH_ALEN; | |
488 | mpc->number_of_mps_macs = num_macs; | |
489 | ||
490 | return tlvs; | |
491 | } | |
492 | ||
493 | static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) | |
494 | { | |
495 | in_cache_entry *entry; | |
496 | struct iphdr *iph; | |
497 | char *buff; | |
30d492da | 498 | __be32 ipaddr = 0; |
1da177e4 LT |
499 | |
500 | static struct { | |
501 | struct llc_snap_hdr hdr; | |
30d492da | 502 | __be32 tag; |
1da177e4 LT |
503 | } tagged_llc_snap_hdr = { |
504 | {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, | |
505 | 0 | |
506 | }; | |
507 | ||
508 | buff = skb->data + mpc->dev->hard_header_len; | |
509 | iph = (struct iphdr *)buff; | |
510 | ipaddr = iph->daddr; | |
511 | ||
b50c2ea7 | 512 | ddprintk("(%s) ipaddr 0x%x\n", |
57100440 | 513 | mpc->dev->name, ipaddr); |
1da177e4 LT |
514 | |
515 | entry = mpc->in_ops->get(ipaddr, mpc); | |
516 | if (entry == NULL) { | |
517 | entry = mpc->in_ops->add_entry(ipaddr, mpc); | |
57100440 JP |
518 | if (entry != NULL) |
519 | mpc->in_ops->put(entry); | |
1da177e4 LT |
520 | return 1; |
521 | } | |
57100440 JP |
522 | /* threshold not exceeded or VCC not ready */ |
523 | if (mpc->in_ops->cache_hit(entry, mpc) != OPEN) { | |
b50c2ea7 | 524 | ddprintk("(%s) cache_hit: returns != OPEN\n", |
57100440 | 525 | mpc->dev->name); |
1da177e4 LT |
526 | mpc->in_ops->put(entry); |
527 | return 1; | |
528 | } | |
529 | ||
b50c2ea7 | 530 | ddprintk("(%s) using shortcut\n", |
57100440 | 531 | mpc->dev->name); |
1da177e4 LT |
532 | /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ |
533 | if (iph->ttl <= 1) { | |
b50c2ea7 | 534 | ddprintk("(%s) IP ttl = %u, using LANE\n", |
57100440 | 535 | mpc->dev->name, iph->ttl); |
1da177e4 LT |
536 | mpc->in_ops->put(entry); |
537 | return 1; | |
538 | } | |
539 | iph->ttl--; | |
540 | iph->check = 0; | |
541 | iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); | |
542 | ||
543 | if (entry->ctrl_info.tag != 0) { | |
b50c2ea7 | 544 | ddprintk("(%s) adding tag 0x%x\n", |
57100440 | 545 | mpc->dev->name, entry->ctrl_info.tag); |
1da177e4 | 546 | tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; |
57100440 JP |
547 | skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ |
548 | skb_push(skb, sizeof(tagged_llc_snap_hdr)); | |
549 | /* add LLC/SNAP header */ | |
27d7ff46 ACM |
550 | skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, |
551 | sizeof(tagged_llc_snap_hdr)); | |
1da177e4 | 552 | } else { |
57100440 JP |
553 | skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ |
554 | skb_push(skb, sizeof(struct llc_snap_hdr)); | |
555 | /* add LLC/SNAP header + tag */ | |
27d7ff46 ACM |
556 | skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, |
557 | sizeof(struct llc_snap_hdr)); | |
1da177e4 LT |
558 | } |
559 | ||
560 | atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); | |
561 | ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; | |
562 | entry->shortcut->send(entry->shortcut, skb); | |
563 | entry->packets_fwded++; | |
564 | mpc->in_ops->put(entry); | |
565 | ||
566 | return 0; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Probably needs some error checks and locking, not sure... | |
571 | */ | |
3c805a22 SH |
572 | static netdev_tx_t mpc_send_packet(struct sk_buff *skb, |
573 | struct net_device *dev) | |
1da177e4 | 574 | { |
1da177e4 LT |
575 | struct mpoa_client *mpc; |
576 | struct ethhdr *eth; | |
577 | int i = 0; | |
f7d57453 | 578 | |
1da177e4 | 579 | mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ |
57100440 JP |
580 | if (mpc == NULL) { |
581 | pr_info("(%s) no MPC found\n", dev->name); | |
1da177e4 LT |
582 | goto non_ip; |
583 | } | |
584 | ||
585 | eth = (struct ethhdr *)skb->data; | |
586 | if (eth->h_proto != htons(ETH_P_IP)) | |
587 | goto non_ip; /* Multi-Protocol Over ATM :-) */ | |
588 | ||
1c9b7aa1 HX |
589 | /* Weed out funny packets (e.g., AF_PACKET or raw). */ |
590 | if (skb->len < ETH_HLEN + sizeof(struct iphdr)) | |
591 | goto non_ip; | |
592 | skb_set_network_header(skb, ETH_HLEN); | |
593 | if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5) | |
594 | goto non_ip; | |
595 | ||
1da177e4 | 596 | while (i < mpc->number_of_mps_macs) { |
57100440 JP |
597 | if (!compare_ether_addr(eth->h_dest, |
598 | (mpc->mps_macs + i*ETH_ALEN))) | |
599 | if (send_via_shortcut(skb, mpc) == 0) /* try shortcut */ | |
600 | return NETDEV_TX_OK; | |
1da177e4 LT |
601 | i++; |
602 | } | |
603 | ||
57100440 JP |
604 | non_ip: |
605 | return mpc->old_ops->ndo_start_xmit(skb, dev); | |
1da177e4 LT |
606 | } |
607 | ||
608 | static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) | |
609 | { | |
610 | int bytes_left; | |
611 | struct mpoa_client *mpc; | |
612 | struct atmmpc_ioc ioc_data; | |
613 | in_cache_entry *in_entry; | |
30d492da | 614 | __be32 ipaddr; |
1da177e4 LT |
615 | |
616 | bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); | |
617 | if (bytes_left != 0) { | |
57100440 JP |
618 | pr_info("mpoa:Short read (missed %d bytes) from userland\n", |
619 | bytes_left); | |
1da177e4 LT |
620 | return -EFAULT; |
621 | } | |
622 | ipaddr = ioc_data.ipaddr; | |
623 | if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) | |
624 | return -EINVAL; | |
f7d57453 | 625 | |
1da177e4 LT |
626 | mpc = find_mpc_by_itfnum(ioc_data.dev_num); |
627 | if (mpc == NULL) | |
628 | return -EINVAL; | |
f7d57453 | 629 | |
1da177e4 LT |
630 | if (ioc_data.type == MPC_SOCKET_INGRESS) { |
631 | in_entry = mpc->in_ops->get(ipaddr, mpc); | |
57100440 JP |
632 | if (in_entry == NULL || |
633 | in_entry->entry_state < INGRESS_RESOLVED) { | |
634 | pr_info("(%s) did not find RESOLVED entry from ingress cache\n", | |
1da177e4 | 635 | mpc->dev->name); |
57100440 JP |
636 | if (in_entry != NULL) |
637 | mpc->in_ops->put(in_entry); | |
1da177e4 LT |
638 | return -EINVAL; |
639 | } | |
57100440 JP |
640 | pr_info("(%s) attaching ingress SVC, entry = %pI4\n", |
641 | mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); | |
1da177e4 LT |
642 | in_entry->shortcut = vcc; |
643 | mpc->in_ops->put(in_entry); | |
644 | } else { | |
57100440 | 645 | pr_info("(%s) attaching egress SVC\n", mpc->dev->name); |
1da177e4 LT |
646 | } |
647 | ||
648 | vcc->proto_data = mpc->dev; | |
649 | vcc->push = mpc_push; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
654 | /* | |
655 | * | |
656 | */ | |
657 | static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) | |
658 | { | |
659 | struct mpoa_client *mpc; | |
660 | in_cache_entry *in_entry; | |
661 | eg_cache_entry *eg_entry; | |
f7d57453 | 662 | |
1da177e4 LT |
663 | mpc = find_mpc_by_lec(dev); |
664 | if (mpc == NULL) { | |
57100440 | 665 | pr_info("(%s) close for unknown MPC\n", dev->name); |
1da177e4 LT |
666 | return; |
667 | } | |
668 | ||
b50c2ea7 | 669 | dprintk("(%s)\n", dev->name); |
1da177e4 LT |
670 | in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); |
671 | if (in_entry) { | |
b50c2ea7 | 672 | dprintk("(%s) ingress SVC closed ip = %pI4\n", |
57100440 | 673 | mpc->dev->name, &in_entry->ctrl_info.in_dst_ip); |
1da177e4 LT |
674 | in_entry->shortcut = NULL; |
675 | mpc->in_ops->put(in_entry); | |
676 | } | |
677 | eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); | |
678 | if (eg_entry) { | |
b50c2ea7 | 679 | dprintk("(%s) egress SVC closed\n", mpc->dev->name); |
1da177e4 LT |
680 | eg_entry->shortcut = NULL; |
681 | mpc->eg_ops->put(eg_entry); | |
682 | } | |
683 | ||
684 | if (in_entry == NULL && eg_entry == NULL) | |
b50c2ea7 | 685 | dprintk("(%s) unused vcc closed\n", dev->name); |
1da177e4 LT |
686 | |
687 | return; | |
688 | } | |
689 | ||
690 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) | |
691 | { | |
692 | struct net_device *dev = (struct net_device *)vcc->proto_data; | |
693 | struct sk_buff *new_skb; | |
694 | eg_cache_entry *eg; | |
695 | struct mpoa_client *mpc; | |
30d492da | 696 | __be32 tag; |
1da177e4 | 697 | char *tmp; |
f7d57453 | 698 | |
b50c2ea7 | 699 | ddprintk("(%s)\n", dev->name); |
1da177e4 | 700 | if (skb == NULL) { |
b50c2ea7 | 701 | dprintk("(%s) null skb, closing VCC\n", dev->name); |
1da177e4 LT |
702 | mpc_vcc_close(vcc, dev); |
703 | return; | |
704 | } | |
f7d57453 | 705 | |
1da177e4 | 706 | skb->dev = dev; |
57100440 JP |
707 | if (memcmp(skb->data, &llc_snap_mpoa_ctrl, |
708 | sizeof(struct llc_snap_hdr)) == 0) { | |
1da177e4 LT |
709 | struct sock *sk = sk_atm(vcc); |
710 | ||
b50c2ea7 | 711 | dprintk("(%s) control packet arrived\n", dev->name); |
1da177e4 LT |
712 | /* Pass control packets to daemon */ |
713 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
714 | sk->sk_data_ready(sk, skb->len); | |
715 | return; | |
716 | } | |
717 | ||
718 | /* data coming over the shortcut */ | |
719 | atm_return(vcc, skb->truesize); | |
720 | ||
721 | mpc = find_mpc_by_lec(dev); | |
722 | if (mpc == NULL) { | |
57100440 | 723 | pr_info("(%s) unknown MPC\n", dev->name); |
1da177e4 LT |
724 | return; |
725 | } | |
726 | ||
57100440 JP |
727 | if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, |
728 | sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ | |
b50c2ea7 | 729 | ddprintk("(%s) tagged data packet arrived\n", dev->name); |
1da177e4 | 730 | |
57100440 JP |
731 | } else if (memcmp(skb->data, &llc_snap_mpoa_data, |
732 | sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ | |
733 | pr_info("(%s) Unsupported non-tagged data packet arrived. Purging\n", | |
734 | dev->name); | |
1da177e4 LT |
735 | dev_kfree_skb_any(skb); |
736 | return; | |
737 | } else { | |
57100440 | 738 | pr_info("(%s) garbage arrived, purging\n", dev->name); |
1da177e4 LT |
739 | dev_kfree_skb_any(skb); |
740 | return; | |
741 | } | |
742 | ||
743 | tmp = skb->data + sizeof(struct llc_snap_hdr); | |
30d492da | 744 | tag = *(__be32 *)tmp; |
1da177e4 LT |
745 | |
746 | eg = mpc->eg_ops->get_by_tag(tag, mpc); | |
747 | if (eg == NULL) { | |
57100440 JP |
748 | pr_info("mpoa: (%s) Didn't find egress cache entry, tag = %u\n", |
749 | dev->name, tag); | |
1da177e4 LT |
750 | purge_egress_shortcut(vcc, NULL); |
751 | dev_kfree_skb_any(skb); | |
752 | return; | |
753 | } | |
f7d57453 | 754 | |
1da177e4 LT |
755 | /* |
756 | * See if ingress MPC is using shortcut we opened as a return channel. | |
757 | * This means we have a bi-directional vcc opened by us. | |
f7d57453 | 758 | */ |
1da177e4 LT |
759 | if (eg->shortcut == NULL) { |
760 | eg->shortcut = vcc; | |
57100440 | 761 | pr_info("(%s) egress SVC in use\n", dev->name); |
1da177e4 LT |
762 | } |
763 | ||
57100440 JP |
764 | skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); |
765 | /* get rid of LLC/SNAP header */ | |
766 | new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); | |
767 | /* LLC/SNAP is shorter than MAC header :( */ | |
1da177e4 | 768 | dev_kfree_skb_any(skb); |
57100440 | 769 | if (new_skb == NULL) { |
1da177e4 LT |
770 | mpc->eg_ops->put(eg); |
771 | return; | |
772 | } | |
773 | skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ | |
27d7ff46 ACM |
774 | skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, |
775 | eg->ctrl_info.DH_length); | |
1da177e4 | 776 | new_skb->protocol = eth_type_trans(new_skb, dev); |
c1d2bbe1 | 777 | skb_reset_network_header(new_skb); |
1da177e4 | 778 | |
eddc9ec5 | 779 | eg->latest_ip_addr = ip_hdr(new_skb)->saddr; |
1da177e4 LT |
780 | eg->packets_rcvd++; |
781 | mpc->eg_ops->put(eg); | |
782 | ||
783 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); | |
784 | netif_rx(new_skb); | |
785 | ||
786 | return; | |
787 | } | |
788 | ||
789 | static struct atmdev_ops mpc_ops = { /* only send is required */ | |
790 | .close = mpoad_close, | |
791 | .send = msg_from_mpoad | |
792 | }; | |
793 | ||
794 | static struct atm_dev mpc_dev = { | |
795 | .ops = &mpc_ops, | |
796 | .type = "mpc", | |
797 | .number = 42, | |
4ef8d0ae | 798 | .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) |
1da177e4 LT |
799 | /* members not explicitly initialised will be 0 */ |
800 | }; | |
801 | ||
57100440 | 802 | static int atm_mpoa_mpoad_attach(struct atm_vcc *vcc, int arg) |
1da177e4 LT |
803 | { |
804 | struct mpoa_client *mpc; | |
805 | struct lec_priv *priv; | |
806 | int err; | |
f7d57453 | 807 | |
1da177e4 LT |
808 | if (mpcs == NULL) { |
809 | init_timer(&mpc_timer); | |
810 | mpc_timer_refresh(); | |
811 | ||
812 | /* This lets us now how our LECs are doing */ | |
813 | err = register_netdevice_notifier(&mpoa_notifier); | |
814 | if (err < 0) { | |
815 | del_timer(&mpc_timer); | |
816 | return err; | |
817 | } | |
818 | } | |
f7d57453 | 819 | |
1da177e4 LT |
820 | mpc = find_mpc_by_itfnum(arg); |
821 | if (mpc == NULL) { | |
b50c2ea7 | 822 | dprintk("allocating new mpc for itf %d\n", arg); |
1da177e4 LT |
823 | mpc = alloc_mpc(); |
824 | if (mpc == NULL) | |
825 | return -ENOMEM; | |
826 | mpc->dev_num = arg; | |
57100440 JP |
827 | mpc->dev = find_lec_by_itfnum(arg); |
828 | /* NULL if there was no lec */ | |
1da177e4 LT |
829 | } |
830 | if (mpc->mpoad_vcc) { | |
57100440 | 831 | pr_info("mpoad is already present for itf %d\n", arg); |
1da177e4 LT |
832 | return -EADDRINUSE; |
833 | } | |
834 | ||
835 | if (mpc->dev) { /* check if the lec is LANE2 capable */ | |
524ad0a7 | 836 | priv = netdev_priv(mpc->dev); |
1da177e4 LT |
837 | if (priv->lane_version < 2) { |
838 | dev_put(mpc->dev); | |
839 | mpc->dev = NULL; | |
840 | } else | |
f7d57453 | 841 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; |
1da177e4 LT |
842 | } |
843 | ||
844 | mpc->mpoad_vcc = vcc; | |
845 | vcc->dev = &mpc_dev; | |
846 | vcc_insert_socket(sk_atm(vcc)); | |
57100440 JP |
847 | set_bit(ATM_VF_META, &vcc->flags); |
848 | set_bit(ATM_VF_READY, &vcc->flags); | |
1da177e4 LT |
849 | |
850 | if (mpc->dev) { | |
851 | char empty[ATM_ESA_LEN]; | |
852 | memset(empty, 0, ATM_ESA_LEN); | |
f7d57453 | 853 | |
1da177e4 LT |
854 | start_mpc(mpc, mpc->dev); |
855 | /* set address if mpcd e.g. gets killed and restarted. | |
856 | * If we do not do it now we have to wait for the next LE_ARP | |
857 | */ | |
57100440 | 858 | if (memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0) |
1da177e4 LT |
859 | send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); |
860 | } | |
861 | ||
862 | __module_get(THIS_MODULE); | |
863 | return arg; | |
864 | } | |
865 | ||
cba5cbd1 | 866 | static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc) |
1da177e4 LT |
867 | { |
868 | struct k_message mesg; | |
869 | ||
57100440 | 870 | memcpy(mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); |
f7d57453 | 871 | |
1da177e4 LT |
872 | mesg.type = SET_MPS_CTRL_ADDR; |
873 | memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); | |
874 | msg_to_mpoad(&mesg, mpc); | |
875 | ||
876 | return; | |
877 | } | |
878 | ||
879 | static void mpoad_close(struct atm_vcc *vcc) | |
880 | { | |
881 | struct mpoa_client *mpc; | |
882 | struct sk_buff *skb; | |
883 | ||
884 | mpc = find_mpc_by_vcc(vcc); | |
885 | if (mpc == NULL) { | |
57100440 | 886 | pr_info("did not find MPC\n"); |
1da177e4 LT |
887 | return; |
888 | } | |
889 | if (!mpc->mpoad_vcc) { | |
57100440 | 890 | pr_info("close for non-present mpoad\n"); |
1da177e4 LT |
891 | return; |
892 | } | |
f7d57453 | 893 | |
1da177e4 LT |
894 | mpc->mpoad_vcc = NULL; |
895 | if (mpc->dev) { | |
524ad0a7 | 896 | struct lec_priv *priv = netdev_priv(mpc->dev); |
1da177e4 LT |
897 | priv->lane2_ops->associate_indicator = NULL; |
898 | stop_mpc(mpc); | |
899 | dev_put(mpc->dev); | |
900 | } | |
901 | ||
902 | mpc->in_ops->destroy_cache(mpc); | |
903 | mpc->eg_ops->destroy_cache(mpc); | |
904 | ||
905 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { | |
906 | atm_return(vcc, skb->truesize); | |
907 | kfree_skb(skb); | |
908 | } | |
f7d57453 | 909 | |
57100440 | 910 | pr_info("(%s) going down\n", |
1da177e4 LT |
911 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
912 | module_put(THIS_MODULE); | |
913 | ||
914 | return; | |
915 | } | |
916 | ||
917 | /* | |
918 | * | |
919 | */ | |
920 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) | |
921 | { | |
f7d57453 | 922 | |
1da177e4 | 923 | struct mpoa_client *mpc = find_mpc_by_vcc(vcc); |
57100440 | 924 | struct k_message *mesg = (struct k_message *)skb->data; |
1da177e4 | 925 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
f7d57453 | 926 | |
1da177e4 | 927 | if (mpc == NULL) { |
57100440 | 928 | pr_info("no mpc found\n"); |
1da177e4 LT |
929 | return 0; |
930 | } | |
b50c2ea7 | 931 | dprintk("(%s)", mpc->dev ? mpc->dev->name : "<unknown>"); |
57100440 | 932 | switch (mesg->type) { |
1da177e4 | 933 | case MPOA_RES_REPLY_RCVD: |
b50c2ea7 | 934 | dprintk_cont("mpoa_res_reply_rcvd\n"); |
1da177e4 LT |
935 | MPOA_res_reply_rcvd(mesg, mpc); |
936 | break; | |
937 | case MPOA_TRIGGER_RCVD: | |
b50c2ea7 | 938 | dprintk_cont("mpoa_trigger_rcvd\n"); |
1da177e4 LT |
939 | MPOA_trigger_rcvd(mesg, mpc); |
940 | break; | |
941 | case INGRESS_PURGE_RCVD: | |
b50c2ea7 | 942 | dprintk_cont("nhrp_purge_rcvd\n"); |
1da177e4 LT |
943 | ingress_purge_rcvd(mesg, mpc); |
944 | break; | |
945 | case EGRESS_PURGE_RCVD: | |
b50c2ea7 | 946 | dprintk_cont("egress_purge_reply_rcvd\n"); |
1da177e4 LT |
947 | egress_purge_rcvd(mesg, mpc); |
948 | break; | |
949 | case MPS_DEATH: | |
b50c2ea7 | 950 | dprintk_cont("mps_death\n"); |
1da177e4 LT |
951 | mps_death(mesg, mpc); |
952 | break; | |
953 | case CACHE_IMPOS_RCVD: | |
b50c2ea7 | 954 | dprintk_cont("cache_impos_rcvd\n"); |
1da177e4 LT |
955 | MPOA_cache_impos_rcvd(mesg, mpc); |
956 | break; | |
957 | case SET_MPC_CTRL_ADDR: | |
b50c2ea7 | 958 | dprintk_cont("set_mpc_ctrl_addr\n"); |
1da177e4 LT |
959 | set_mpc_ctrl_addr_rcvd(mesg, mpc); |
960 | break; | |
961 | case SET_MPS_MAC_ADDR: | |
b50c2ea7 | 962 | dprintk_cont("set_mps_mac_addr\n"); |
1da177e4 LT |
963 | set_mps_mac_addr_rcvd(mesg, mpc); |
964 | break; | |
965 | case CLEAN_UP_AND_EXIT: | |
b50c2ea7 | 966 | dprintk_cont("clean_up_and_exit\n"); |
1da177e4 LT |
967 | clean_up(mesg, mpc, DIE); |
968 | break; | |
969 | case RELOAD: | |
b50c2ea7 | 970 | dprintk_cont("reload\n"); |
1da177e4 LT |
971 | clean_up(mesg, mpc, RELOAD); |
972 | break; | |
973 | case SET_MPC_PARAMS: | |
b50c2ea7 | 974 | dprintk_cont("set_mpc_params\n"); |
1da177e4 LT |
975 | mpc->parameters = mesg->content.params; |
976 | break; | |
977 | default: | |
b50c2ea7 | 978 | dprintk_cont("unknown message %d\n", mesg->type); |
1da177e4 LT |
979 | break; |
980 | } | |
981 | kfree_skb(skb); | |
982 | ||
983 | return 0; | |
984 | } | |
985 | ||
986 | /* Remember that this function may not do things that sleep */ | |
987 | int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) | |
988 | { | |
989 | struct sk_buff *skb; | |
990 | struct sock *sk; | |
991 | ||
992 | if (mpc == NULL || !mpc->mpoad_vcc) { | |
57100440 | 993 | pr_info("mesg %d to a non-existent mpoad\n", mesg->type); |
1da177e4 LT |
994 | return -ENXIO; |
995 | } | |
996 | ||
997 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); | |
998 | if (skb == NULL) | |
999 | return -ENOMEM; | |
1000 | skb_put(skb, sizeof(struct k_message)); | |
27d7ff46 | 1001 | skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); |
1da177e4 | 1002 | atm_force_charge(mpc->mpoad_vcc, skb->truesize); |
f7d57453 | 1003 | |
1da177e4 LT |
1004 | sk = sk_atm(mpc->mpoad_vcc); |
1005 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
1006 | sk->sk_data_ready(sk, skb->len); | |
1007 | ||
1008 | return 0; | |
1009 | } | |
1010 | ||
57100440 JP |
1011 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, |
1012 | unsigned long event, void *dev_ptr) | |
1da177e4 LT |
1013 | { |
1014 | struct net_device *dev; | |
1015 | struct mpoa_client *mpc; | |
1016 | struct lec_priv *priv; | |
1017 | ||
1018 | dev = (struct net_device *)dev_ptr; | |
e9dc8653 | 1019 | |
721499e8 | 1020 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
1021 | return NOTIFY_DONE; |
1022 | ||
1da177e4 LT |
1023 | if (dev->name == NULL || strncmp(dev->name, "lec", 3)) |
1024 | return NOTIFY_DONE; /* we are only interested in lec:s */ | |
f7d57453 | 1025 | |
1da177e4 LT |
1026 | switch (event) { |
1027 | case NETDEV_REGISTER: /* a new lec device was allocated */ | |
524ad0a7 | 1028 | priv = netdev_priv(dev); |
1da177e4 LT |
1029 | if (priv->lane_version < 2) |
1030 | break; | |
1031 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; | |
1032 | mpc = find_mpc_by_itfnum(priv->itfnum); | |
1033 | if (mpc == NULL) { | |
b50c2ea7 | 1034 | dprintk("allocating new mpc for %s\n", dev->name); |
1da177e4 LT |
1035 | mpc = alloc_mpc(); |
1036 | if (mpc == NULL) { | |
57100440 | 1037 | pr_info("no new mpc"); |
1da177e4 LT |
1038 | break; |
1039 | } | |
1040 | } | |
1041 | mpc->dev_num = priv->itfnum; | |
1042 | mpc->dev = dev; | |
1043 | dev_hold(dev); | |
b50c2ea7 | 1044 | dprintk("(%s) was initialized\n", dev->name); |
1da177e4 LT |
1045 | break; |
1046 | case NETDEV_UNREGISTER: | |
1047 | /* the lec device was deallocated */ | |
1048 | mpc = find_mpc_by_lec(dev); | |
1049 | if (mpc == NULL) | |
1050 | break; | |
b50c2ea7 | 1051 | dprintk("device (%s) was deallocated\n", dev->name); |
1da177e4 LT |
1052 | stop_mpc(mpc); |
1053 | dev_put(mpc->dev); | |
1054 | mpc->dev = NULL; | |
1055 | break; | |
1056 | case NETDEV_UP: | |
1057 | /* the dev was ifconfig'ed up */ | |
1058 | mpc = find_mpc_by_lec(dev); | |
1059 | if (mpc == NULL) | |
1060 | break; | |
57100440 | 1061 | if (mpc->mpoad_vcc != NULL) |
1da177e4 | 1062 | start_mpc(mpc, dev); |
1da177e4 LT |
1063 | break; |
1064 | case NETDEV_DOWN: | |
1065 | /* the dev was ifconfig'ed down */ | |
1066 | /* this means that the flow of packets from the | |
1067 | * upper layer stops | |
1068 | */ | |
1069 | mpc = find_mpc_by_lec(dev); | |
1070 | if (mpc == NULL) | |
1071 | break; | |
57100440 | 1072 | if (mpc->mpoad_vcc != NULL) |
1da177e4 | 1073 | stop_mpc(mpc); |
1da177e4 LT |
1074 | break; |
1075 | case NETDEV_REBOOT: | |
1076 | case NETDEV_CHANGE: | |
1077 | case NETDEV_CHANGEMTU: | |
1078 | case NETDEV_CHANGEADDR: | |
1079 | case NETDEV_GOING_DOWN: | |
1080 | break; | |
1081 | default: | |
1082 | break; | |
1083 | } | |
1084 | ||
1085 | return NOTIFY_DONE; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Functions which are called after a message is received from mpcd. | |
1090 | * Msg is reused on purpose. | |
1091 | */ | |
1092 | ||
1093 | ||
1094 | static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1095 | { | |
30d492da | 1096 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 LT |
1097 | in_cache_entry *entry; |
1098 | ||
1099 | entry = mpc->in_ops->get(dst_ip, mpc); | |
57100440 | 1100 | if (entry == NULL) { |
1da177e4 LT |
1101 | entry = mpc->in_ops->add_entry(dst_ip, mpc); |
1102 | entry->entry_state = INGRESS_RESOLVING; | |
1103 | msg->type = SND_MPOA_RES_RQST; | |
1104 | msg->content.in_info = entry->ctrl_info; | |
1105 | msg_to_mpoad(msg, mpc); | |
1106 | do_gettimeofday(&(entry->reply_wait)); | |
1107 | mpc->in_ops->put(entry); | |
1108 | return; | |
1109 | } | |
f7d57453 | 1110 | |
57100440 | 1111 | if (entry->entry_state == INGRESS_INVALID) { |
1da177e4 LT |
1112 | entry->entry_state = INGRESS_RESOLVING; |
1113 | msg->type = SND_MPOA_RES_RQST; | |
1114 | msg->content.in_info = entry->ctrl_info; | |
1115 | msg_to_mpoad(msg, mpc); | |
1116 | do_gettimeofday(&(entry->reply_wait)); | |
1117 | mpc->in_ops->put(entry); | |
1118 | return; | |
1119 | } | |
f7d57453 | 1120 | |
57100440 | 1121 | pr_info("(%s) entry already in resolving state\n", |
1da177e4 LT |
1122 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
1123 | mpc->in_ops->put(entry); | |
1124 | return; | |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | * Things get complicated because we have to check if there's an egress | |
f7d57453 | 1129 | * shortcut with suitable traffic parameters we could use. |
1da177e4 | 1130 | */ |
57100440 JP |
1131 | static void check_qos_and_open_shortcut(struct k_message *msg, |
1132 | struct mpoa_client *client, | |
1133 | in_cache_entry *entry) | |
1da177e4 | 1134 | { |
30d492da | 1135 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 LT |
1136 | struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); |
1137 | eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); | |
1138 | ||
57100440 JP |
1139 | if (eg_entry && eg_entry->shortcut) { |
1140 | if (eg_entry->shortcut->qos.txtp.traffic_class & | |
1141 | msg->qos.txtp.traffic_class & | |
1142 | (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)) { | |
1143 | if (eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) | |
1144 | entry->shortcut = eg_entry->shortcut; | |
1145 | else if (eg_entry->shortcut->qos.txtp.max_pcr > 0) | |
1146 | entry->shortcut = eg_entry->shortcut; | |
1da177e4 | 1147 | } |
57100440 | 1148 | if (entry->shortcut) { |
b50c2ea7 | 1149 | dprintk("(%s) using egress SVC to reach %pI4\n", |
21454aaa | 1150 | client->dev->name, &dst_ip); |
1da177e4 LT |
1151 | client->eg_ops->put(eg_entry); |
1152 | return; | |
1153 | } | |
1154 | } | |
1155 | if (eg_entry != NULL) | |
1156 | client->eg_ops->put(eg_entry); | |
1157 | ||
1158 | /* No luck in the egress cache we must open an ingress SVC */ | |
1159 | msg->type = OPEN_INGRESS_SVC; | |
57100440 JP |
1160 | if (qos && |
1161 | (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) { | |
1da177e4 | 1162 | msg->qos = qos->qos; |
57100440 JP |
1163 | pr_info("(%s) trying to get a CBR shortcut\n", |
1164 | client->dev->name); | |
1165 | } else | |
1166 | memset(&msg->qos, 0, sizeof(struct atm_qos)); | |
1da177e4 LT |
1167 | msg_to_mpoad(msg, client); |
1168 | return; | |
1169 | } | |
1170 | ||
1171 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1172 | { | |
30d492da | 1173 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 | 1174 | in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); |
1e4fd51e | 1175 | |
b50c2ea7 | 1176 | dprintk("(%s) ip %pI4\n", |
21454aaa | 1177 | mpc->dev->name, &dst_ip); |
b50c2ea7 | 1178 | ddprintk("(%s) entry = %p", |
57100440 JP |
1179 | mpc->dev->name, entry); |
1180 | if (entry == NULL) { | |
1181 | pr_info("(%s) ARGH, received res. reply for an entry that doesn't exist.\n", | |
1182 | mpc->dev->name); | |
1da177e4 LT |
1183 | return; |
1184 | } | |
b50c2ea7 | 1185 | ddprintk_cont(" entry_state = %d ", entry->entry_state); |
1da177e4 LT |
1186 | |
1187 | if (entry->entry_state == INGRESS_RESOLVED) { | |
57100440 | 1188 | pr_info("(%s) RESOLVED entry!\n", mpc->dev->name); |
1da177e4 LT |
1189 | mpc->in_ops->put(entry); |
1190 | return; | |
1191 | } | |
1192 | ||
1193 | entry->ctrl_info = msg->content.in_info; | |
1194 | do_gettimeofday(&(entry->tv)); | |
1195 | do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ | |
1196 | entry->refresh_time = 0; | |
b50c2ea7 | 1197 | ddprintk_cont("entry->shortcut = %p\n", entry->shortcut); |
1da177e4 | 1198 | |
57100440 JP |
1199 | if (entry->entry_state == INGRESS_RESOLVING && |
1200 | entry->shortcut != NULL) { | |
f7d57453 | 1201 | entry->entry_state = INGRESS_RESOLVED; |
1da177e4 LT |
1202 | mpc->in_ops->put(entry); |
1203 | return; /* Shortcut already open... */ | |
1204 | } | |
1205 | ||
1206 | if (entry->shortcut != NULL) { | |
57100440 JP |
1207 | pr_info("(%s) entry->shortcut != NULL, impossible!\n", |
1208 | mpc->dev->name); | |
1da177e4 LT |
1209 | mpc->in_ops->put(entry); |
1210 | return; | |
1211 | } | |
f7d57453 | 1212 | |
1da177e4 LT |
1213 | check_qos_and_open_shortcut(msg, mpc, entry); |
1214 | entry->entry_state = INGRESS_RESOLVED; | |
1215 | mpc->in_ops->put(entry); | |
1216 | ||
1217 | return; | |
1218 | ||
1219 | } | |
1220 | ||
1221 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1222 | { | |
30d492da AV |
1223 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1224 | __be32 mask = msg->ip_mask; | |
1da177e4 LT |
1225 | in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); |
1226 | ||
57100440 JP |
1227 | if (entry == NULL) { |
1228 | pr_info("(%s) purge for a non-existing entry, ip = %pI4\n", | |
1229 | mpc->dev->name, &dst_ip); | |
1da177e4 LT |
1230 | return; |
1231 | } | |
1232 | ||
1233 | do { | |
b50c2ea7 | 1234 | dprintk("(%s) removing an ingress entry, ip = %pI4\n", |
21454aaa | 1235 | mpc->dev->name, &dst_ip); |
1da177e4 LT |
1236 | write_lock_bh(&mpc->ingress_lock); |
1237 | mpc->in_ops->remove_entry(entry, mpc); | |
1238 | write_unlock_bh(&mpc->ingress_lock); | |
1239 | mpc->in_ops->put(entry); | |
1240 | entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); | |
1241 | } while (entry != NULL); | |
1242 | ||
1243 | return; | |
f7d57453 | 1244 | } |
1da177e4 LT |
1245 | |
1246 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1247 | { | |
30d492da | 1248 | __be32 cache_id = msg->content.eg_info.cache_id; |
1da177e4 | 1249 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); |
f7d57453 | 1250 | |
1da177e4 | 1251 | if (entry == NULL) { |
b50c2ea7 | 1252 | dprintk("(%s) purge for a non-existing entry\n", |
57100440 | 1253 | mpc->dev->name); |
1da177e4 LT |
1254 | return; |
1255 | } | |
1256 | ||
1257 | write_lock_irq(&mpc->egress_lock); | |
1258 | mpc->eg_ops->remove_entry(entry, mpc); | |
1259 | write_unlock_irq(&mpc->egress_lock); | |
1260 | ||
1261 | mpc->eg_ops->put(entry); | |
1262 | ||
1263 | return; | |
f7d57453 | 1264 | } |
1da177e4 LT |
1265 | |
1266 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) | |
1267 | { | |
1268 | struct sock *sk; | |
1269 | struct k_message *purge_msg; | |
1270 | struct sk_buff *skb; | |
1271 | ||
b50c2ea7 | 1272 | dprintk("entering\n"); |
1da177e4 | 1273 | if (vcc == NULL) { |
57100440 | 1274 | pr_info("vcc == NULL\n"); |
1da177e4 LT |
1275 | return; |
1276 | } | |
1277 | ||
1278 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); | |
1279 | if (skb == NULL) { | |
57100440 | 1280 | pr_info("out of memory\n"); |
1da177e4 LT |
1281 | return; |
1282 | } | |
1283 | ||
1284 | skb_put(skb, sizeof(struct k_message)); | |
1285 | memset(skb->data, 0, sizeof(struct k_message)); | |
1286 | purge_msg = (struct k_message *)skb->data; | |
1287 | purge_msg->type = DATA_PLANE_PURGE; | |
1288 | if (entry != NULL) | |
1289 | purge_msg->content.eg_info = entry->ctrl_info; | |
1290 | ||
1291 | atm_force_charge(vcc, skb->truesize); | |
1292 | ||
1293 | sk = sk_atm(vcc); | |
1294 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
1295 | sk->sk_data_ready(sk, skb->len); | |
b50c2ea7 | 1296 | dprintk("exiting\n"); |
1da177e4 LT |
1297 | |
1298 | return; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * Our MPS died. Tell our daemon to send NHRP data plane purge to each | |
1303 | * of the egress shortcuts we have. | |
1304 | */ | |
57100440 | 1305 | static void mps_death(struct k_message *msg, struct mpoa_client *mpc) |
1da177e4 LT |
1306 | { |
1307 | eg_cache_entry *entry; | |
1308 | ||
b50c2ea7 | 1309 | dprintk("(%s)\n", mpc->dev->name); |
1da177e4 | 1310 | |
57100440 JP |
1311 | if (memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)) { |
1312 | pr_info("(%s) wrong MPS\n", mpc->dev->name); | |
1da177e4 LT |
1313 | return; |
1314 | } | |
1315 | ||
1316 | /* FIXME: This knows too much of the cache structure */ | |
1317 | read_lock_irq(&mpc->egress_lock); | |
1318 | entry = mpc->eg_cache; | |
1319 | while (entry != NULL) { | |
1320 | purge_egress_shortcut(entry->shortcut, entry); | |
1321 | entry = entry->next; | |
1322 | } | |
1323 | read_unlock_irq(&mpc->egress_lock); | |
1324 | ||
1325 | mpc->in_ops->destroy_cache(mpc); | |
1326 | mpc->eg_ops->destroy_cache(mpc); | |
1327 | ||
1328 | return; | |
1329 | } | |
1330 | ||
57100440 JP |
1331 | static void MPOA_cache_impos_rcvd(struct k_message *msg, |
1332 | struct mpoa_client *mpc) | |
1da177e4 LT |
1333 | { |
1334 | uint16_t holding_time; | |
1335 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); | |
f7d57453 | 1336 | |
1da177e4 | 1337 | holding_time = msg->content.eg_info.holding_time; |
b50c2ea7 | 1338 | dprintk("(%s) entry = %p, holding_time = %u\n", |
57100440 JP |
1339 | mpc->dev->name, entry, holding_time); |
1340 | if (entry == NULL && holding_time) { | |
1da177e4 LT |
1341 | entry = mpc->eg_ops->add_entry(msg, mpc); |
1342 | mpc->eg_ops->put(entry); | |
1343 | return; | |
1344 | } | |
57100440 | 1345 | if (holding_time) { |
1da177e4 LT |
1346 | mpc->eg_ops->update(entry, holding_time); |
1347 | return; | |
1348 | } | |
f7d57453 | 1349 | |
1da177e4 LT |
1350 | write_lock_irq(&mpc->egress_lock); |
1351 | mpc->eg_ops->remove_entry(entry, mpc); | |
1352 | write_unlock_irq(&mpc->egress_lock); | |
1353 | ||
1354 | mpc->eg_ops->put(entry); | |
f7d57453 | 1355 | |
1da177e4 LT |
1356 | return; |
1357 | } | |
1358 | ||
57100440 JP |
1359 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, |
1360 | struct mpoa_client *mpc) | |
1da177e4 LT |
1361 | { |
1362 | struct lec_priv *priv; | |
1363 | int i, retval ; | |
1364 | ||
1365 | uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; | |
1366 | ||
1367 | tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ | |
1368 | tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ | |
1369 | tlv[5] = 0x02; /* MPOA client */ | |
1370 | tlv[6] = 0x00; /* number of MPS MAC addresses */ | |
1371 | ||
1372 | memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ | |
1373 | memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); | |
1374 | ||
b50c2ea7 JP |
1375 | dprintk("(%s) setting MPC ctrl ATM address to", |
1376 | mpc->dev ? mpc->dev->name : "<unknown>"); | |
1da177e4 | 1377 | for (i = 7; i < sizeof(tlv); i++) |
b50c2ea7 JP |
1378 | dprintk_cont(" %02x", tlv[i]); |
1379 | dprintk_cont("\n"); | |
1da177e4 LT |
1380 | |
1381 | if (mpc->dev) { | |
524ad0a7 | 1382 | priv = netdev_priv(mpc->dev); |
57100440 JP |
1383 | retval = priv->lane2_ops->associate_req(mpc->dev, |
1384 | mpc->dev->dev_addr, | |
1385 | tlv, sizeof(tlv)); | |
1da177e4 | 1386 | if (retval == 0) |
57100440 JP |
1387 | pr_info("(%s) MPOA device type TLV association failed\n", |
1388 | mpc->dev->name); | |
1da177e4 LT |
1389 | retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); |
1390 | if (retval < 0) | |
57100440 JP |
1391 | pr_info("(%s) targetless LE_ARP request failed\n", |
1392 | mpc->dev->name); | |
1da177e4 LT |
1393 | } |
1394 | ||
1395 | return; | |
1396 | } | |
1397 | ||
57100440 JP |
1398 | static void set_mps_mac_addr_rcvd(struct k_message *msg, |
1399 | struct mpoa_client *client) | |
1da177e4 LT |
1400 | { |
1401 | ||
57100440 | 1402 | if (client->number_of_mps_macs) |
1da177e4 LT |
1403 | kfree(client->mps_macs); |
1404 | client->number_of_mps_macs = 0; | |
2afe37cd | 1405 | client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); |
1da177e4 | 1406 | if (client->mps_macs == NULL) { |
57100440 | 1407 | pr_info("out of memory\n"); |
1da177e4 LT |
1408 | return; |
1409 | } | |
1410 | client->number_of_mps_macs = 1; | |
f7d57453 | 1411 | |
1da177e4 LT |
1412 | return; |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * purge egress cache and tell daemon to 'action' (DIE, RELOAD) | |
1417 | */ | |
1418 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) | |
1419 | { | |
1420 | ||
1421 | eg_cache_entry *entry; | |
1422 | msg->type = SND_EGRESS_PURGE; | |
1423 | ||
1424 | ||
1425 | /* FIXME: This knows too much of the cache structure */ | |
1426 | read_lock_irq(&mpc->egress_lock); | |
1427 | entry = mpc->eg_cache; | |
57100440 JP |
1428 | while (entry != NULL) { |
1429 | msg->content.eg_info = entry->ctrl_info; | |
b50c2ea7 | 1430 | dprintk("cache_id %u\n", entry->ctrl_info.cache_id); |
57100440 JP |
1431 | msg_to_mpoad(msg, mpc); |
1432 | entry = entry->next; | |
1da177e4 LT |
1433 | } |
1434 | read_unlock_irq(&mpc->egress_lock); | |
1435 | ||
1436 | msg->type = action; | |
1437 | msg_to_mpoad(msg, mpc); | |
1438 | return; | |
1439 | } | |
1440 | ||
1441 | static void mpc_timer_refresh(void) | |
1442 | { | |
1443 | mpc_timer.expires = jiffies + (MPC_P2 * HZ); | |
1444 | mpc_timer.data = mpc_timer.expires; | |
1445 | mpc_timer.function = mpc_cache_check; | |
1446 | add_timer(&mpc_timer); | |
f7d57453 | 1447 | |
1da177e4 LT |
1448 | return; |
1449 | } | |
1450 | ||
57100440 | 1451 | static void mpc_cache_check(unsigned long checking_time) |
1da177e4 LT |
1452 | { |
1453 | struct mpoa_client *mpc = mpcs; | |
1454 | static unsigned long previous_resolving_check_time; | |
1455 | static unsigned long previous_refresh_time; | |
f7d57453 | 1456 | |
57100440 | 1457 | while (mpc != NULL) { |
1da177e4 LT |
1458 | mpc->in_ops->clear_count(mpc); |
1459 | mpc->eg_ops->clear_expired(mpc); | |
57100440 JP |
1460 | if (checking_time - previous_resolving_check_time > |
1461 | mpc->parameters.mpc_p4 * HZ) { | |
1da177e4 LT |
1462 | mpc->in_ops->check_resolving(mpc); |
1463 | previous_resolving_check_time = checking_time; | |
1464 | } | |
57100440 JP |
1465 | if (checking_time - previous_refresh_time > |
1466 | mpc->parameters.mpc_p5 * HZ) { | |
1da177e4 LT |
1467 | mpc->in_ops->refresh(mpc); |
1468 | previous_refresh_time = checking_time; | |
1469 | } | |
1470 | mpc = mpc->next; | |
1471 | } | |
1472 | mpc_timer_refresh(); | |
f7d57453 | 1473 | |
1da177e4 LT |
1474 | return; |
1475 | } | |
1476 | ||
57100440 JP |
1477 | static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, |
1478 | unsigned long arg) | |
1da177e4 LT |
1479 | { |
1480 | int err = 0; | |
1481 | struct atm_vcc *vcc = ATM_SD(sock); | |
1482 | ||
1483 | if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) | |
1484 | return -ENOIOCTLCMD; | |
1485 | ||
1486 | if (!capable(CAP_NET_ADMIN)) | |
1487 | return -EPERM; | |
1488 | ||
1489 | switch (cmd) { | |
57100440 JP |
1490 | case ATMMPC_CTRL: |
1491 | err = atm_mpoa_mpoad_attach(vcc, (int)arg); | |
1492 | if (err >= 0) | |
1493 | sock->state = SS_CONNECTED; | |
1494 | break; | |
1495 | case ATMMPC_DATA: | |
1496 | err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); | |
1497 | break; | |
1498 | default: | |
1499 | break; | |
1da177e4 LT |
1500 | } |
1501 | return err; | |
1502 | } | |
1503 | ||
1da177e4 LT |
1504 | static struct atm_ioctl atm_ioctl_ops = { |
1505 | .owner = THIS_MODULE, | |
1506 | .ioctl = atm_mpoa_ioctl, | |
1507 | }; | |
1508 | ||
1509 | static __init int atm_mpoa_init(void) | |
1510 | { | |
1511 | register_atm_ioctl(&atm_ioctl_ops); | |
1512 | ||
1da177e4 | 1513 | if (mpc_proc_init() != 0) |
99824461 | 1514 | pr_info("failed to initialize /proc/mpoa\n"); |
1da177e4 | 1515 | |
57100440 | 1516 | pr_info("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); |
1da177e4 LT |
1517 | |
1518 | return 0; | |
1519 | } | |
1520 | ||
1521 | static void __exit atm_mpoa_cleanup(void) | |
1522 | { | |
1523 | struct mpoa_client *mpc, *tmp; | |
1524 | struct atm_mpoa_qos *qos, *nextqos; | |
1525 | struct lec_priv *priv; | |
1526 | ||
1da177e4 | 1527 | mpc_proc_clean(); |
1da177e4 LT |
1528 | |
1529 | del_timer(&mpc_timer); | |
1530 | unregister_netdevice_notifier(&mpoa_notifier); | |
1531 | deregister_atm_ioctl(&atm_ioctl_ops); | |
1532 | ||
1533 | mpc = mpcs; | |
1534 | mpcs = NULL; | |
1535 | while (mpc != NULL) { | |
1536 | tmp = mpc->next; | |
1537 | if (mpc->dev != NULL) { | |
1538 | stop_mpc(mpc); | |
524ad0a7 | 1539 | priv = netdev_priv(mpc->dev); |
1da177e4 LT |
1540 | if (priv->lane2_ops != NULL) |
1541 | priv->lane2_ops->associate_indicator = NULL; | |
1542 | } | |
b50c2ea7 | 1543 | ddprintk("about to clear caches\n"); |
1da177e4 LT |
1544 | mpc->in_ops->destroy_cache(mpc); |
1545 | mpc->eg_ops->destroy_cache(mpc); | |
b50c2ea7 | 1546 | ddprintk("caches cleared\n"); |
1da177e4 LT |
1547 | kfree(mpc->mps_macs); |
1548 | memset(mpc, 0, sizeof(struct mpoa_client)); | |
b50c2ea7 | 1549 | ddprintk("about to kfree %p\n", mpc); |
1da177e4 | 1550 | kfree(mpc); |
b50c2ea7 | 1551 | ddprintk("next mpc is at %p\n", tmp); |
1da177e4 LT |
1552 | mpc = tmp; |
1553 | } | |
1554 | ||
1555 | qos = qos_head; | |
1556 | qos_head = NULL; | |
1557 | while (qos != NULL) { | |
1558 | nextqos = qos->next; | |
b50c2ea7 | 1559 | dprintk("freeing qos entry %p\n", qos); |
1da177e4 LT |
1560 | kfree(qos); |
1561 | qos = nextqos; | |
1562 | } | |
1563 | ||
1564 | return; | |
1565 | } | |
1566 | ||
1567 | module_init(atm_mpoa_init); | |
1568 | module_exit(atm_mpoa_cleanup); | |
1569 | ||
1570 | MODULE_LICENSE("GPL"); |