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