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> | |
5a0e3ad6 | 5 | #include <linux/slab.h> |
1da177e4 LT |
6 | #include <linux/timer.h> |
7 | #include <linux/init.h> | |
8 | #include <linux/bitops.h> | |
4fc268d2 | 9 | #include <linux/capability.h> |
1da177e4 LT |
10 | #include <linux/seq_file.h> |
11 | ||
12 | /* We are an ethernet device */ | |
13 | #include <linux/if_ether.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/etherdevice.h> | |
16 | #include <net/sock.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/ip.h> | |
57100440 | 19 | #include <linux/uaccess.h> |
1da177e4 | 20 | #include <asm/byteorder.h> |
1da177e4 LT |
21 | #include <net/checksum.h> /* for ip_fast_csum() */ |
22 | #include <net/arp.h> | |
23 | #include <net/dst.h> | |
24 | #include <linux/proc_fs.h> | |
25 | ||
26 | /* And atm device */ | |
27 | #include <linux/atmdev.h> | |
28 | #include <linux/atmlec.h> | |
29 | #include <linux/atmmpc.h> | |
30 | /* Modular too */ | |
1da177e4 LT |
31 | #include <linux/module.h> |
32 | ||
33 | #include "lec.h" | |
34 | #include "mpc.h" | |
35 | #include "resources.h" | |
36 | ||
37 | /* | |
f7d57453 | 38 | * mpc.c: Implementation of MPOA client kernel part |
1da177e4 LT |
39 | */ |
40 | ||
41 | #if 0 | |
b50c2ea7 JP |
42 | #define dprintk(format, args...) \ |
43 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args) | |
44 | #define dprintk_cont(format, args...) printk(KERN_CONT format, ##args) | |
1da177e4 | 45 | #else |
b50c2ea7 JP |
46 | #define dprintk(format, args...) \ |
47 | do { if (0) \ | |
48 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\ | |
49 | } while (0) | |
50 | #define dprintk_cont(format, args...) \ | |
51 | do { if (0) printk(KERN_CONT format, ##args); } while (0) | |
1da177e4 LT |
52 | #endif |
53 | ||
54 | #if 0 | |
b50c2ea7 JP |
55 | #define ddprintk(format, args...) \ |
56 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args) | |
57 | #define ddprintk_cont(format, args...) printk(KERN_CONT format, ##args) | |
1da177e4 | 58 | #else |
b50c2ea7 JP |
59 | #define ddprintk(format, args...) \ |
60 | do { if (0) \ | |
61 | printk(KERN_DEBUG "mpoa:%s: " format, __func__, ##args);\ | |
62 | } while (0) | |
63 | #define ddprintk_cont(format, args...) \ | |
64 | do { if (0) printk(KERN_CONT format, ##args); } while (0) | |
1da177e4 LT |
65 | #endif |
66 | ||
1da177e4 LT |
67 | #define MPOA_TAG_LEN 4 |
68 | ||
69 | /* mpc_daemon -> kernel */ | |
57100440 | 70 | static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
1da177e4 LT |
71 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); |
72 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); | |
73 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); | |
74 | static void mps_death(struct k_message *msg, struct mpoa_client *mpc); | |
57100440 JP |
75 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, |
76 | int action); | |
77 | static void MPOA_cache_impos_rcvd(struct k_message *msg, | |
78 | struct mpoa_client *mpc); | |
79 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, | |
80 | struct mpoa_client *mpc); | |
81 | static void set_mps_mac_addr_rcvd(struct k_message *mesg, | |
82 | struct mpoa_client *mpc); | |
1da177e4 | 83 | |
cba5cbd1 DH |
84 | static const uint8_t *copy_macs(struct mpoa_client *mpc, |
85 | const uint8_t *router_mac, | |
86 | const uint8_t *tlvs, uint8_t mps_macs, | |
87 | uint8_t device_type); | |
1da177e4 LT |
88 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); |
89 | ||
cba5cbd1 | 90 | static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc); |
1da177e4 LT |
91 | static void mpoad_close(struct atm_vcc *vcc); |
92 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); | |
93 | ||
94 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); | |
3c805a22 | 95 | static netdev_tx_t mpc_send_packet(struct sk_buff *skb, |
57100440 JP |
96 | struct net_device *dev); |
97 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, | |
98 | unsigned long event, void *dev); | |
1da177e4 | 99 | static void mpc_timer_refresh(void); |
57100440 | 100 | static void mpc_cache_check(unsigned long checking_time); |
1da177e4 LT |
101 | |
102 | static struct llc_snap_hdr llc_snap_mpoa_ctrl = { | |
103 | 0xaa, 0xaa, 0x03, | |
104 | {0x00, 0x00, 0x5e}, | |
105 | {0x00, 0x03} /* For MPOA control PDUs */ | |
f7d57453 | 106 | }; |
1da177e4 LT |
107 | static struct llc_snap_hdr llc_snap_mpoa_data = { |
108 | 0xaa, 0xaa, 0x03, | |
109 | {0x00, 0x00, 0x00}, | |
110 | {0x08, 0x00} /* This is for IP PDUs only */ | |
f7d57453 | 111 | }; |
1da177e4 LT |
112 | static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { |
113 | 0xaa, 0xaa, 0x03, | |
114 | {0x00, 0x00, 0x00}, | |
115 | {0x88, 0x4c} /* This is for tagged data PDUs */ | |
f7d57453 | 116 | }; |
1da177e4 LT |
117 | |
118 | static struct notifier_block mpoa_notifier = { | |
119 | mpoa_event_listener, | |
120 | NULL, | |
121 | 0 | |
122 | }; | |
123 | ||
1da177e4 LT |
124 | struct mpoa_client *mpcs = NULL; /* FIXME */ |
125 | static struct atm_mpoa_qos *qos_head = NULL; | |
8d06afab | 126 | static DEFINE_TIMER(mpc_timer, NULL, 0, 0); |
1da177e4 LT |
127 | |
128 | ||
129 | static struct mpoa_client *find_mpc_by_itfnum(int itf) | |
130 | { | |
131 | struct mpoa_client *mpc; | |
f7d57453 | 132 | |
1da177e4 LT |
133 | mpc = mpcs; /* our global linked list */ |
134 | while (mpc != NULL) { | |
135 | if (mpc->dev_num == itf) | |
136 | return mpc; | |
f7d57453 | 137 | mpc = mpc->next; |
1da177e4 LT |
138 | } |
139 | ||
140 | return NULL; /* not found */ | |
141 | } | |
142 | ||
143 | static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) | |
144 | { | |
145 | struct mpoa_client *mpc; | |
f7d57453 | 146 | |
1da177e4 LT |
147 | mpc = mpcs; /* our global linked list */ |
148 | while (mpc != NULL) { | |
149 | if (mpc->mpoad_vcc == vcc) | |
150 | return mpc; | |
151 | mpc = mpc->next; | |
152 | } | |
153 | ||
154 | return NULL; /* not found */ | |
155 | } | |
156 | ||
157 | static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) | |
158 | { | |
159 | struct mpoa_client *mpc; | |
f7d57453 | 160 | |
1da177e4 LT |
161 | mpc = mpcs; /* our global linked list */ |
162 | while (mpc != NULL) { | |
163 | if (mpc->dev == dev) | |
164 | return mpc; | |
165 | mpc = mpc->next; | |
166 | } | |
167 | ||
168 | return NULL; /* not found */ | |
169 | } | |
170 | ||
171 | /* | |
172 | * Functions for managing QoS list | |
173 | */ | |
174 | ||
175 | /* | |
176 | * Overwrites the old entry or makes a new one. | |
177 | */ | |
30d492da | 178 | struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) |
1da177e4 LT |
179 | { |
180 | struct atm_mpoa_qos *entry; | |
181 | ||
182 | entry = atm_mpoa_search_qos(dst_ip); | |
183 | if (entry != NULL) { | |
184 | entry->qos = *qos; | |
185 | return entry; | |
186 | } | |
187 | ||
188 | entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); | |
189 | if (entry == NULL) { | |
57100440 | 190 | pr_info("mpoa: out of memory\n"); |
1da177e4 LT |
191 | return entry; |
192 | } | |
193 | ||
194 | entry->ipaddr = dst_ip; | |
195 | entry->qos = *qos; | |
196 | ||
197 | entry->next = qos_head; | |
198 | qos_head = entry; | |
199 | ||
200 | return entry; | |
201 | } | |
202 | ||
30d492da | 203 | struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) |
1da177e4 LT |
204 | { |
205 | struct atm_mpoa_qos *qos; | |
206 | ||
207 | qos = qos_head; | |
57100440 JP |
208 | while (qos) { |
209 | if (qos->ipaddr == dst_ip) | |
1da177e4 | 210 | break; |
1da177e4 LT |
211 | qos = qos->next; |
212 | } | |
213 | ||
214 | return qos; | |
f7d57453 | 215 | } |
1da177e4 LT |
216 | |
217 | /* | |
218 | * Returns 0 for failure | |
219 | */ | |
220 | int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) | |
221 | { | |
1da177e4 LT |
222 | struct atm_mpoa_qos *curr; |
223 | ||
57100440 JP |
224 | if (entry == NULL) |
225 | return 0; | |
1da177e4 LT |
226 | if (entry == qos_head) { |
227 | qos_head = qos_head->next; | |
228 | kfree(entry); | |
229 | return 1; | |
230 | } | |
231 | ||
232 | curr = qos_head; | |
233 | while (curr != NULL) { | |
234 | if (curr->next == entry) { | |
235 | curr->next = entry->next; | |
236 | kfree(entry); | |
237 | return 1; | |
238 | } | |
239 | curr = curr->next; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | /* this is buggered - we need locking for qos_head */ | |
246 | void atm_mpoa_disp_qos(struct seq_file *m) | |
247 | { | |
1da177e4 LT |
248 | struct atm_mpoa_qos *qos; |
249 | ||
250 | qos = qos_head; | |
251 | seq_printf(m, "QoS entries for shortcuts:\n"); | |
252 | 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"); | |
253 | ||
1da177e4 | 254 | while (qos != NULL) { |
21454aaa | 255 | seq_printf(m, "%pI4\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", |
57100440 JP |
256 | &qos->ipaddr, |
257 | qos->qos.txtp.max_pcr, | |
258 | qos->qos.txtp.pcr, | |
259 | qos->qos.txtp.min_pcr, | |
260 | qos->qos.txtp.max_cdv, | |
261 | qos->qos.txtp.max_sdu, | |
262 | qos->qos.rxtp.max_pcr, | |
263 | qos->qos.rxtp.pcr, | |
264 | qos->qos.rxtp.min_pcr, | |
265 | qos->qos.rxtp.max_cdv, | |
266 | qos->qos.rxtp.max_sdu); | |
1da177e4 LT |
267 | qos = qos->next; |
268 | } | |
269 | } | |
270 | ||
271 | static struct net_device *find_lec_by_itfnum(int itf) | |
272 | { | |
273 | struct net_device *dev; | |
274 | char name[IFNAMSIZ]; | |
275 | ||
276 | sprintf(name, "lec%d", itf); | |
881d966b | 277 | dev = dev_get_by_name(&init_net, name); |
f7d57453 | 278 | |
1da177e4 LT |
279 | return dev; |
280 | } | |
281 | ||
282 | static struct mpoa_client *alloc_mpc(void) | |
283 | { | |
284 | struct mpoa_client *mpc; | |
285 | ||
57100440 | 286 | mpc = kzalloc(sizeof(struct mpoa_client), GFP_KERNEL); |
1da177e4 LT |
287 | if (mpc == NULL) |
288 | return NULL; | |
1da177e4 LT |
289 | rwlock_init(&mpc->ingress_lock); |
290 | rwlock_init(&mpc->egress_lock); | |
291 | mpc->next = mpcs; | |
292 | atm_mpoa_init_cache(mpc); | |
293 | ||
294 | mpc->parameters.mpc_p1 = MPC_P1; | |
295 | mpc->parameters.mpc_p2 = MPC_P2; | |
57100440 | 296 | memset(mpc->parameters.mpc_p3, 0, sizeof(mpc->parameters.mpc_p3)); |
1da177e4 | 297 | mpc->parameters.mpc_p4 = MPC_P4; |
f7d57453 | 298 | mpc->parameters.mpc_p5 = MPC_P5; |
1da177e4 | 299 | mpc->parameters.mpc_p6 = MPC_P6; |
f7d57453 | 300 | |
1da177e4 | 301 | mpcs = mpc; |
f7d57453 | 302 | |
1da177e4 LT |
303 | return mpc; |
304 | } | |
305 | ||
306 | /* | |
307 | * | |
308 | * start_mpc() puts the MPC on line. All the packets destined | |
f7d57453 | 309 | * to the lec underneath us are now being monitored and |
1da177e4 LT |
310 | * shortcuts will be established. |
311 | * | |
312 | */ | |
313 | static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) | |
314 | { | |
f7d57453 | 315 | |
b50c2ea7 | 316 | dprintk("(%s)\n", mpc->dev->name); |
788dee0a | 317 | if (!dev->netdev_ops) |
57100440 | 318 | pr_info("(%s) not starting\n", dev->name); |
788dee0a SH |
319 | else { |
320 | mpc->old_ops = dev->netdev_ops; | |
321 | mpc->new_ops = *mpc->old_ops; | |
322 | mpc->new_ops.ndo_start_xmit = mpc_send_packet; | |
323 | dev->netdev_ops = &mpc->new_ops; | |
1da177e4 | 324 | } |
1da177e4 LT |
325 | } |
326 | ||
327 | static void stop_mpc(struct mpoa_client *mpc) | |
328 | { | |
788dee0a | 329 | struct net_device *dev = mpc->dev; |
b50c2ea7 | 330 | dprintk("(%s)", mpc->dev->name); |
1da177e4 LT |
331 | |
332 | /* Lets not nullify lec device's dev->hard_start_xmit */ | |
788dee0a | 333 | if (dev->netdev_ops != &mpc->new_ops) { |
b50c2ea7 | 334 | dprintk_cont(" mpc already stopped, not fatal\n"); |
1da177e4 LT |
335 | return; |
336 | } | |
b50c2ea7 | 337 | dprintk_cont("\n"); |
f7d57453 | 338 | |
788dee0a SH |
339 | dev->netdev_ops = mpc->old_ops; |
340 | mpc->old_ops = NULL; | |
341 | ||
342 | /* close_shortcuts(mpc); ??? FIXME */ | |
1da177e4 LT |
343 | } |
344 | ||
345 | static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); | |
346 | ||
347 | static const char *mpoa_device_type_string(char type) | |
348 | { | |
57100440 | 349 | switch (type) { |
1da177e4 LT |
350 | case NON_MPOA: |
351 | return "non-MPOA device"; | |
1da177e4 LT |
352 | case MPS: |
353 | return "MPS"; | |
1da177e4 LT |
354 | case MPC: |
355 | return "MPC"; | |
1da177e4 LT |
356 | case MPS_AND_MPC: |
357 | return "both MPS and MPC"; | |
1da177e4 LT |
358 | } |
359 | ||
57100440 | 360 | return "unspecified (non-MPOA) device"; |
1da177e4 LT |
361 | } |
362 | ||
363 | /* | |
b74ca3a8 WC |
364 | * lec device calls this via its netdev_priv(dev)->lane2_ops |
365 | * ->associate_indicator() when it sees a TLV in LE_ARP packet. | |
1da177e4 LT |
366 | * We fill in the pointer above when we see a LANE2 lec initializing |
367 | * See LANE2 spec 3.1.5 | |
368 | * | |
369 | * Quite a big and ugly function but when you look at it | |
370 | * all it does is to try to locate and parse MPOA Device | |
371 | * Type TLV. | |
372 | * We give our lec a pointer to this function and when the | |
373 | * lec sees a TLV it uses the pointer to call this function. | |
374 | * | |
375 | */ | |
cba5cbd1 DH |
376 | static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr, |
377 | const u8 *tlvs, u32 sizeoftlvs) | |
1da177e4 LT |
378 | { |
379 | uint32_t type; | |
380 | uint8_t length, mpoa_device_type, number_of_mps_macs; | |
cba5cbd1 | 381 | const uint8_t *end_of_tlvs; |
1da177e4 | 382 | struct mpoa_client *mpc; |
f7d57453 | 383 | |
1da177e4 | 384 | mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ |
b50c2ea7 | 385 | dprintk("(%s) received TLV(s), ", dev->name); |
1da177e4 LT |
386 | dprintk("total length of all TLVs %d\n", sizeoftlvs); |
387 | mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ | |
388 | if (mpc == NULL) { | |
57100440 | 389 | pr_info("(%s) no mpc\n", dev->name); |
1da177e4 LT |
390 | return; |
391 | } | |
392 | end_of_tlvs = tlvs + sizeoftlvs; | |
393 | while (end_of_tlvs - tlvs >= 5) { | |
57100440 JP |
394 | type = ((tlvs[0] << 24) | (tlvs[1] << 16) | |
395 | (tlvs[2] << 8) | tlvs[3]); | |
1da177e4 LT |
396 | length = tlvs[4]; |
397 | tlvs += 5; | |
398 | dprintk(" type 0x%x length %02x\n", type, length); | |
399 | if (tlvs + length > end_of_tlvs) { | |
57100440 | 400 | pr_info("TLV value extends past its buffer, aborting parse\n"); |
1da177e4 LT |
401 | return; |
402 | } | |
f7d57453 | 403 | |
1da177e4 | 404 | if (type == 0) { |
57100440 JP |
405 | pr_info("mpoa: (%s) TLV type was 0, returning\n", |
406 | dev->name); | |
1da177e4 LT |
407 | return; |
408 | } | |
409 | ||
410 | if (type != TLV_MPOA_DEVICE_TYPE) { | |
411 | tlvs += length; | |
412 | continue; /* skip other TLVs */ | |
413 | } | |
414 | mpoa_device_type = *tlvs++; | |
415 | number_of_mps_macs = *tlvs++; | |
b50c2ea7 | 416 | dprintk("(%s) MPOA device type '%s', ", |
57100440 | 417 | dev->name, mpoa_device_type_string(mpoa_device_type)); |
1da177e4 LT |
418 | if (mpoa_device_type == MPS_AND_MPC && |
419 | length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ | |
57100440 JP |
420 | pr_info("(%s) short MPOA Device Type TLV\n", |
421 | dev->name); | |
1da177e4 LT |
422 | continue; |
423 | } | |
57100440 JP |
424 | if ((mpoa_device_type == MPS || mpoa_device_type == MPC) && |
425 | length < 22 + number_of_mps_macs*ETH_ALEN) { | |
426 | pr_info("(%s) short MPOA Device Type TLV\n", dev->name); | |
1da177e4 LT |
427 | continue; |
428 | } | |
57100440 JP |
429 | if (mpoa_device_type != MPS && |
430 | mpoa_device_type != MPS_AND_MPC) { | |
b50c2ea7 | 431 | dprintk("ignoring non-MPS device "); |
57100440 JP |
432 | if (mpoa_device_type == MPC) |
433 | tlvs += 20; | |
1da177e4 LT |
434 | continue; /* we are only interested in MPSs */ |
435 | } | |
57100440 JP |
436 | if (number_of_mps_macs == 0 && |
437 | mpoa_device_type == MPS_AND_MPC) { | |
438 | pr_info("(%s) MPS_AND_MPC has zero MACs\n", dev->name); | |
1da177e4 LT |
439 | continue; /* someone should read the spec */ |
440 | } | |
b50c2ea7 JP |
441 | dprintk_cont("this MPS has %d MAC addresses\n", |
442 | number_of_mps_macs); | |
f7d57453 | 443 | |
57100440 JP |
444 | /* |
445 | * ok, now we can go and tell our daemon | |
446 | * the control address of MPS | |
447 | */ | |
1da177e4 | 448 | send_set_mps_ctrl_addr(tlvs, mpc); |
f7d57453 | 449 | |
57100440 JP |
450 | tlvs = copy_macs(mpc, mac_addr, tlvs, |
451 | number_of_mps_macs, mpoa_device_type); | |
452 | if (tlvs == NULL) | |
453 | return; | |
1da177e4 LT |
454 | } |
455 | if (end_of_tlvs - tlvs != 0) | |
57100440 JP |
456 | pr_info("(%s) ignoring %Zd bytes of trailing TLV garbage\n", |
457 | dev->name, end_of_tlvs - tlvs); | |
1da177e4 LT |
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 | ||
688 | static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) | |
689 | { | |
690 | struct net_device *dev = (struct net_device *)vcc->proto_data; | |
691 | struct sk_buff *new_skb; | |
692 | eg_cache_entry *eg; | |
693 | struct mpoa_client *mpc; | |
30d492da | 694 | __be32 tag; |
1da177e4 | 695 | char *tmp; |
f7d57453 | 696 | |
b50c2ea7 | 697 | ddprintk("(%s)\n", dev->name); |
1da177e4 | 698 | if (skb == NULL) { |
b50c2ea7 | 699 | dprintk("(%s) null skb, closing VCC\n", dev->name); |
1da177e4 LT |
700 | mpc_vcc_close(vcc, dev); |
701 | return; | |
702 | } | |
f7d57453 | 703 | |
1da177e4 | 704 | skb->dev = dev; |
57100440 JP |
705 | if (memcmp(skb->data, &llc_snap_mpoa_ctrl, |
706 | sizeof(struct llc_snap_hdr)) == 0) { | |
1da177e4 LT |
707 | struct sock *sk = sk_atm(vcc); |
708 | ||
b50c2ea7 | 709 | dprintk("(%s) control packet arrived\n", dev->name); |
1da177e4 LT |
710 | /* Pass control packets to daemon */ |
711 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
712 | sk->sk_data_ready(sk, skb->len); | |
713 | return; | |
714 | } | |
715 | ||
716 | /* data coming over the shortcut */ | |
717 | atm_return(vcc, skb->truesize); | |
718 | ||
719 | mpc = find_mpc_by_lec(dev); | |
720 | if (mpc == NULL) { | |
57100440 | 721 | pr_info("(%s) unknown MPC\n", dev->name); |
1da177e4 LT |
722 | return; |
723 | } | |
724 | ||
57100440 JP |
725 | if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, |
726 | sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ | |
b50c2ea7 | 727 | ddprintk("(%s) tagged data packet arrived\n", dev->name); |
1da177e4 | 728 | |
57100440 JP |
729 | } else if (memcmp(skb->data, &llc_snap_mpoa_data, |
730 | sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ | |
731 | pr_info("(%s) Unsupported non-tagged data packet arrived. Purging\n", | |
732 | dev->name); | |
1da177e4 LT |
733 | dev_kfree_skb_any(skb); |
734 | return; | |
735 | } else { | |
57100440 | 736 | pr_info("(%s) garbage arrived, purging\n", dev->name); |
1da177e4 LT |
737 | dev_kfree_skb_any(skb); |
738 | return; | |
739 | } | |
740 | ||
741 | tmp = skb->data + sizeof(struct llc_snap_hdr); | |
30d492da | 742 | tag = *(__be32 *)tmp; |
1da177e4 LT |
743 | |
744 | eg = mpc->eg_ops->get_by_tag(tag, mpc); | |
745 | if (eg == NULL) { | |
57100440 JP |
746 | pr_info("mpoa: (%s) Didn't find egress cache entry, tag = %u\n", |
747 | dev->name, tag); | |
1da177e4 LT |
748 | purge_egress_shortcut(vcc, NULL); |
749 | dev_kfree_skb_any(skb); | |
750 | return; | |
751 | } | |
f7d57453 | 752 | |
1da177e4 LT |
753 | /* |
754 | * See if ingress MPC is using shortcut we opened as a return channel. | |
755 | * This means we have a bi-directional vcc opened by us. | |
f7d57453 | 756 | */ |
1da177e4 LT |
757 | if (eg->shortcut == NULL) { |
758 | eg->shortcut = vcc; | |
57100440 | 759 | pr_info("(%s) egress SVC in use\n", dev->name); |
1da177e4 LT |
760 | } |
761 | ||
57100440 JP |
762 | skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); |
763 | /* get rid of LLC/SNAP header */ | |
764 | new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); | |
765 | /* LLC/SNAP is shorter than MAC header :( */ | |
1da177e4 | 766 | dev_kfree_skb_any(skb); |
57100440 | 767 | if (new_skb == NULL) { |
1da177e4 LT |
768 | mpc->eg_ops->put(eg); |
769 | return; | |
770 | } | |
771 | skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ | |
27d7ff46 ACM |
772 | skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, |
773 | eg->ctrl_info.DH_length); | |
1da177e4 | 774 | new_skb->protocol = eth_type_trans(new_skb, dev); |
c1d2bbe1 | 775 | skb_reset_network_header(new_skb); |
1da177e4 | 776 | |
eddc9ec5 | 777 | eg->latest_ip_addr = ip_hdr(new_skb)->saddr; |
1da177e4 LT |
778 | eg->packets_rcvd++; |
779 | mpc->eg_ops->put(eg); | |
780 | ||
781 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); | |
782 | netif_rx(new_skb); | |
1da177e4 LT |
783 | } |
784 | ||
785 | static struct atmdev_ops mpc_ops = { /* only send is required */ | |
786 | .close = mpoad_close, | |
787 | .send = msg_from_mpoad | |
788 | }; | |
789 | ||
790 | static struct atm_dev mpc_dev = { | |
791 | .ops = &mpc_ops, | |
792 | .type = "mpc", | |
793 | .number = 42, | |
4ef8d0ae | 794 | .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) |
1da177e4 LT |
795 | /* members not explicitly initialised will be 0 */ |
796 | }; | |
797 | ||
57100440 | 798 | static int atm_mpoa_mpoad_attach(struct atm_vcc *vcc, int arg) |
1da177e4 LT |
799 | { |
800 | struct mpoa_client *mpc; | |
801 | struct lec_priv *priv; | |
802 | int err; | |
f7d57453 | 803 | |
1da177e4 LT |
804 | if (mpcs == NULL) { |
805 | init_timer(&mpc_timer); | |
806 | mpc_timer_refresh(); | |
807 | ||
808 | /* This lets us now how our LECs are doing */ | |
809 | err = register_netdevice_notifier(&mpoa_notifier); | |
810 | if (err < 0) { | |
811 | del_timer(&mpc_timer); | |
812 | return err; | |
813 | } | |
814 | } | |
f7d57453 | 815 | |
1da177e4 LT |
816 | mpc = find_mpc_by_itfnum(arg); |
817 | if (mpc == NULL) { | |
b50c2ea7 | 818 | dprintk("allocating new mpc for itf %d\n", arg); |
1da177e4 LT |
819 | mpc = alloc_mpc(); |
820 | if (mpc == NULL) | |
821 | return -ENOMEM; | |
822 | mpc->dev_num = arg; | |
57100440 JP |
823 | mpc->dev = find_lec_by_itfnum(arg); |
824 | /* NULL if there was no lec */ | |
1da177e4 LT |
825 | } |
826 | if (mpc->mpoad_vcc) { | |
57100440 | 827 | pr_info("mpoad is already present for itf %d\n", arg); |
1da177e4 LT |
828 | return -EADDRINUSE; |
829 | } | |
830 | ||
831 | if (mpc->dev) { /* check if the lec is LANE2 capable */ | |
524ad0a7 | 832 | priv = netdev_priv(mpc->dev); |
1da177e4 LT |
833 | if (priv->lane_version < 2) { |
834 | dev_put(mpc->dev); | |
835 | mpc->dev = NULL; | |
836 | } else | |
f7d57453 | 837 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; |
1da177e4 LT |
838 | } |
839 | ||
840 | mpc->mpoad_vcc = vcc; | |
841 | vcc->dev = &mpc_dev; | |
842 | vcc_insert_socket(sk_atm(vcc)); | |
57100440 JP |
843 | set_bit(ATM_VF_META, &vcc->flags); |
844 | set_bit(ATM_VF_READY, &vcc->flags); | |
1da177e4 LT |
845 | |
846 | if (mpc->dev) { | |
847 | char empty[ATM_ESA_LEN]; | |
848 | memset(empty, 0, ATM_ESA_LEN); | |
f7d57453 | 849 | |
1da177e4 LT |
850 | start_mpc(mpc, mpc->dev); |
851 | /* set address if mpcd e.g. gets killed and restarted. | |
852 | * If we do not do it now we have to wait for the next LE_ARP | |
853 | */ | |
57100440 | 854 | if (memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0) |
1da177e4 LT |
855 | send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); |
856 | } | |
857 | ||
858 | __module_get(THIS_MODULE); | |
859 | return arg; | |
860 | } | |
861 | ||
cba5cbd1 | 862 | static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc) |
1da177e4 LT |
863 | { |
864 | struct k_message mesg; | |
865 | ||
57100440 | 866 | memcpy(mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); |
f7d57453 | 867 | |
1da177e4 LT |
868 | mesg.type = SET_MPS_CTRL_ADDR; |
869 | memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); | |
870 | msg_to_mpoad(&mesg, mpc); | |
1da177e4 LT |
871 | } |
872 | ||
873 | static void mpoad_close(struct atm_vcc *vcc) | |
874 | { | |
875 | struct mpoa_client *mpc; | |
876 | struct sk_buff *skb; | |
877 | ||
878 | mpc = find_mpc_by_vcc(vcc); | |
879 | if (mpc == NULL) { | |
57100440 | 880 | pr_info("did not find MPC\n"); |
1da177e4 LT |
881 | return; |
882 | } | |
883 | if (!mpc->mpoad_vcc) { | |
57100440 | 884 | pr_info("close for non-present mpoad\n"); |
1da177e4 LT |
885 | return; |
886 | } | |
f7d57453 | 887 | |
1da177e4 LT |
888 | mpc->mpoad_vcc = NULL; |
889 | if (mpc->dev) { | |
524ad0a7 | 890 | struct lec_priv *priv = netdev_priv(mpc->dev); |
1da177e4 LT |
891 | priv->lane2_ops->associate_indicator = NULL; |
892 | stop_mpc(mpc); | |
893 | dev_put(mpc->dev); | |
894 | } | |
895 | ||
896 | mpc->in_ops->destroy_cache(mpc); | |
897 | mpc->eg_ops->destroy_cache(mpc); | |
898 | ||
899 | while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { | |
900 | atm_return(vcc, skb->truesize); | |
901 | kfree_skb(skb); | |
902 | } | |
f7d57453 | 903 | |
57100440 | 904 | pr_info("(%s) going down\n", |
1da177e4 LT |
905 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
906 | module_put(THIS_MODULE); | |
1da177e4 LT |
907 | } |
908 | ||
909 | /* | |
910 | * | |
911 | */ | |
912 | static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) | |
913 | { | |
f7d57453 | 914 | |
1da177e4 | 915 | struct mpoa_client *mpc = find_mpc_by_vcc(vcc); |
57100440 | 916 | struct k_message *mesg = (struct k_message *)skb->data; |
1da177e4 | 917 | atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
f7d57453 | 918 | |
1da177e4 | 919 | if (mpc == NULL) { |
57100440 | 920 | pr_info("no mpc found\n"); |
1da177e4 LT |
921 | return 0; |
922 | } | |
b50c2ea7 | 923 | dprintk("(%s)", mpc->dev ? mpc->dev->name : "<unknown>"); |
57100440 | 924 | switch (mesg->type) { |
1da177e4 | 925 | case MPOA_RES_REPLY_RCVD: |
b50c2ea7 | 926 | dprintk_cont("mpoa_res_reply_rcvd\n"); |
1da177e4 LT |
927 | MPOA_res_reply_rcvd(mesg, mpc); |
928 | break; | |
929 | case MPOA_TRIGGER_RCVD: | |
b50c2ea7 | 930 | dprintk_cont("mpoa_trigger_rcvd\n"); |
1da177e4 LT |
931 | MPOA_trigger_rcvd(mesg, mpc); |
932 | break; | |
933 | case INGRESS_PURGE_RCVD: | |
b50c2ea7 | 934 | dprintk_cont("nhrp_purge_rcvd\n"); |
1da177e4 LT |
935 | ingress_purge_rcvd(mesg, mpc); |
936 | break; | |
937 | case EGRESS_PURGE_RCVD: | |
b50c2ea7 | 938 | dprintk_cont("egress_purge_reply_rcvd\n"); |
1da177e4 LT |
939 | egress_purge_rcvd(mesg, mpc); |
940 | break; | |
941 | case MPS_DEATH: | |
b50c2ea7 | 942 | dprintk_cont("mps_death\n"); |
1da177e4 LT |
943 | mps_death(mesg, mpc); |
944 | break; | |
945 | case CACHE_IMPOS_RCVD: | |
b50c2ea7 | 946 | dprintk_cont("cache_impos_rcvd\n"); |
1da177e4 LT |
947 | MPOA_cache_impos_rcvd(mesg, mpc); |
948 | break; | |
949 | case SET_MPC_CTRL_ADDR: | |
b50c2ea7 | 950 | dprintk_cont("set_mpc_ctrl_addr\n"); |
1da177e4 LT |
951 | set_mpc_ctrl_addr_rcvd(mesg, mpc); |
952 | break; | |
953 | case SET_MPS_MAC_ADDR: | |
b50c2ea7 | 954 | dprintk_cont("set_mps_mac_addr\n"); |
1da177e4 LT |
955 | set_mps_mac_addr_rcvd(mesg, mpc); |
956 | break; | |
957 | case CLEAN_UP_AND_EXIT: | |
b50c2ea7 | 958 | dprintk_cont("clean_up_and_exit\n"); |
1da177e4 LT |
959 | clean_up(mesg, mpc, DIE); |
960 | break; | |
961 | case RELOAD: | |
b50c2ea7 | 962 | dprintk_cont("reload\n"); |
1da177e4 LT |
963 | clean_up(mesg, mpc, RELOAD); |
964 | break; | |
965 | case SET_MPC_PARAMS: | |
b50c2ea7 | 966 | dprintk_cont("set_mpc_params\n"); |
1da177e4 LT |
967 | mpc->parameters = mesg->content.params; |
968 | break; | |
969 | default: | |
b50c2ea7 | 970 | dprintk_cont("unknown message %d\n", mesg->type); |
1da177e4 LT |
971 | break; |
972 | } | |
973 | kfree_skb(skb); | |
974 | ||
975 | return 0; | |
976 | } | |
977 | ||
978 | /* Remember that this function may not do things that sleep */ | |
979 | int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) | |
980 | { | |
981 | struct sk_buff *skb; | |
982 | struct sock *sk; | |
983 | ||
984 | if (mpc == NULL || !mpc->mpoad_vcc) { | |
57100440 | 985 | pr_info("mesg %d to a non-existent mpoad\n", mesg->type); |
1da177e4 LT |
986 | return -ENXIO; |
987 | } | |
988 | ||
989 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); | |
990 | if (skb == NULL) | |
991 | return -ENOMEM; | |
992 | skb_put(skb, sizeof(struct k_message)); | |
27d7ff46 | 993 | skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); |
1da177e4 | 994 | atm_force_charge(mpc->mpoad_vcc, skb->truesize); |
f7d57453 | 995 | |
1da177e4 LT |
996 | sk = sk_atm(mpc->mpoad_vcc); |
997 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
998 | sk->sk_data_ready(sk, skb->len); | |
999 | ||
1000 | return 0; | |
1001 | } | |
1002 | ||
57100440 JP |
1003 | static int mpoa_event_listener(struct notifier_block *mpoa_notifier, |
1004 | unsigned long event, void *dev_ptr) | |
1da177e4 LT |
1005 | { |
1006 | struct net_device *dev; | |
1007 | struct mpoa_client *mpc; | |
1008 | struct lec_priv *priv; | |
1009 | ||
1010 | dev = (struct net_device *)dev_ptr; | |
e9dc8653 | 1011 | |
721499e8 | 1012 | if (!net_eq(dev_net(dev), &init_net)) |
e9dc8653 EB |
1013 | return NOTIFY_DONE; |
1014 | ||
1da177e4 LT |
1015 | if (dev->name == NULL || strncmp(dev->name, "lec", 3)) |
1016 | return NOTIFY_DONE; /* we are only interested in lec:s */ | |
f7d57453 | 1017 | |
1da177e4 LT |
1018 | switch (event) { |
1019 | case NETDEV_REGISTER: /* a new lec device was allocated */ | |
524ad0a7 | 1020 | priv = netdev_priv(dev); |
1da177e4 LT |
1021 | if (priv->lane_version < 2) |
1022 | break; | |
1023 | priv->lane2_ops->associate_indicator = lane2_assoc_ind; | |
1024 | mpc = find_mpc_by_itfnum(priv->itfnum); | |
1025 | if (mpc == NULL) { | |
b50c2ea7 | 1026 | dprintk("allocating new mpc for %s\n", dev->name); |
1da177e4 LT |
1027 | mpc = alloc_mpc(); |
1028 | if (mpc == NULL) { | |
57100440 | 1029 | pr_info("no new mpc"); |
1da177e4 LT |
1030 | break; |
1031 | } | |
1032 | } | |
1033 | mpc->dev_num = priv->itfnum; | |
1034 | mpc->dev = dev; | |
1035 | dev_hold(dev); | |
b50c2ea7 | 1036 | dprintk("(%s) was initialized\n", dev->name); |
1da177e4 LT |
1037 | break; |
1038 | case NETDEV_UNREGISTER: | |
1039 | /* the lec device was deallocated */ | |
1040 | mpc = find_mpc_by_lec(dev); | |
1041 | if (mpc == NULL) | |
1042 | break; | |
b50c2ea7 | 1043 | dprintk("device (%s) was deallocated\n", dev->name); |
1da177e4 LT |
1044 | stop_mpc(mpc); |
1045 | dev_put(mpc->dev); | |
1046 | mpc->dev = NULL; | |
1047 | break; | |
1048 | case NETDEV_UP: | |
1049 | /* the dev was ifconfig'ed up */ | |
1050 | mpc = find_mpc_by_lec(dev); | |
1051 | if (mpc == NULL) | |
1052 | break; | |
57100440 | 1053 | if (mpc->mpoad_vcc != NULL) |
1da177e4 | 1054 | start_mpc(mpc, dev); |
1da177e4 LT |
1055 | break; |
1056 | case NETDEV_DOWN: | |
1057 | /* the dev was ifconfig'ed down */ | |
1058 | /* this means that the flow of packets from the | |
1059 | * upper layer stops | |
1060 | */ | |
1061 | mpc = find_mpc_by_lec(dev); | |
1062 | if (mpc == NULL) | |
1063 | break; | |
57100440 | 1064 | if (mpc->mpoad_vcc != NULL) |
1da177e4 | 1065 | stop_mpc(mpc); |
1da177e4 LT |
1066 | break; |
1067 | case NETDEV_REBOOT: | |
1068 | case NETDEV_CHANGE: | |
1069 | case NETDEV_CHANGEMTU: | |
1070 | case NETDEV_CHANGEADDR: | |
1071 | case NETDEV_GOING_DOWN: | |
1072 | break; | |
1073 | default: | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | return NOTIFY_DONE; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Functions which are called after a message is received from mpcd. | |
1082 | * Msg is reused on purpose. | |
1083 | */ | |
1084 | ||
1085 | ||
1086 | static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1087 | { | |
30d492da | 1088 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 LT |
1089 | in_cache_entry *entry; |
1090 | ||
1091 | entry = mpc->in_ops->get(dst_ip, mpc); | |
57100440 | 1092 | if (entry == NULL) { |
1da177e4 LT |
1093 | entry = mpc->in_ops->add_entry(dst_ip, mpc); |
1094 | entry->entry_state = INGRESS_RESOLVING; | |
1095 | msg->type = SND_MPOA_RES_RQST; | |
1096 | msg->content.in_info = entry->ctrl_info; | |
1097 | msg_to_mpoad(msg, mpc); | |
1098 | do_gettimeofday(&(entry->reply_wait)); | |
1099 | mpc->in_ops->put(entry); | |
1100 | return; | |
1101 | } | |
f7d57453 | 1102 | |
57100440 | 1103 | if (entry->entry_state == INGRESS_INVALID) { |
1da177e4 LT |
1104 | entry->entry_state = INGRESS_RESOLVING; |
1105 | msg->type = SND_MPOA_RES_RQST; | |
1106 | msg->content.in_info = entry->ctrl_info; | |
1107 | msg_to_mpoad(msg, mpc); | |
1108 | do_gettimeofday(&(entry->reply_wait)); | |
1109 | mpc->in_ops->put(entry); | |
1110 | return; | |
1111 | } | |
f7d57453 | 1112 | |
57100440 | 1113 | pr_info("(%s) entry already in resolving state\n", |
1da177e4 LT |
1114 | (mpc->dev) ? mpc->dev->name : "<unknown>"); |
1115 | mpc->in_ops->put(entry); | |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | /* | |
1119 | * Things get complicated because we have to check if there's an egress | |
f7d57453 | 1120 | * shortcut with suitable traffic parameters we could use. |
1da177e4 | 1121 | */ |
57100440 JP |
1122 | static void check_qos_and_open_shortcut(struct k_message *msg, |
1123 | struct mpoa_client *client, | |
1124 | in_cache_entry *entry) | |
1da177e4 | 1125 | { |
30d492da | 1126 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 LT |
1127 | struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); |
1128 | eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); | |
1129 | ||
57100440 JP |
1130 | if (eg_entry && eg_entry->shortcut) { |
1131 | if (eg_entry->shortcut->qos.txtp.traffic_class & | |
1132 | msg->qos.txtp.traffic_class & | |
1133 | (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)) { | |
1134 | if (eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) | |
1135 | entry->shortcut = eg_entry->shortcut; | |
1136 | else if (eg_entry->shortcut->qos.txtp.max_pcr > 0) | |
1137 | entry->shortcut = eg_entry->shortcut; | |
1da177e4 | 1138 | } |
57100440 | 1139 | if (entry->shortcut) { |
b50c2ea7 | 1140 | dprintk("(%s) using egress SVC to reach %pI4\n", |
21454aaa | 1141 | client->dev->name, &dst_ip); |
1da177e4 LT |
1142 | client->eg_ops->put(eg_entry); |
1143 | return; | |
1144 | } | |
1145 | } | |
1146 | if (eg_entry != NULL) | |
1147 | client->eg_ops->put(eg_entry); | |
1148 | ||
1149 | /* No luck in the egress cache we must open an ingress SVC */ | |
1150 | msg->type = OPEN_INGRESS_SVC; | |
57100440 JP |
1151 | if (qos && |
1152 | (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) { | |
1da177e4 | 1153 | msg->qos = qos->qos; |
57100440 JP |
1154 | pr_info("(%s) trying to get a CBR shortcut\n", |
1155 | client->dev->name); | |
1156 | } else | |
1157 | memset(&msg->qos, 0, sizeof(struct atm_qos)); | |
1da177e4 | 1158 | msg_to_mpoad(msg, client); |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1162 | { | |
30d492da | 1163 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1da177e4 | 1164 | in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); |
1e4fd51e | 1165 | |
b50c2ea7 | 1166 | dprintk("(%s) ip %pI4\n", |
21454aaa | 1167 | mpc->dev->name, &dst_ip); |
b50c2ea7 | 1168 | ddprintk("(%s) entry = %p", |
57100440 JP |
1169 | mpc->dev->name, entry); |
1170 | if (entry == NULL) { | |
1171 | pr_info("(%s) ARGH, received res. reply for an entry that doesn't exist.\n", | |
1172 | mpc->dev->name); | |
1da177e4 LT |
1173 | return; |
1174 | } | |
b50c2ea7 | 1175 | ddprintk_cont(" entry_state = %d ", entry->entry_state); |
1da177e4 LT |
1176 | |
1177 | if (entry->entry_state == INGRESS_RESOLVED) { | |
57100440 | 1178 | pr_info("(%s) RESOLVED entry!\n", mpc->dev->name); |
1da177e4 LT |
1179 | mpc->in_ops->put(entry); |
1180 | return; | |
1181 | } | |
1182 | ||
1183 | entry->ctrl_info = msg->content.in_info; | |
1184 | do_gettimeofday(&(entry->tv)); | |
1185 | do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ | |
1186 | entry->refresh_time = 0; | |
b50c2ea7 | 1187 | ddprintk_cont("entry->shortcut = %p\n", entry->shortcut); |
1da177e4 | 1188 | |
57100440 JP |
1189 | if (entry->entry_state == INGRESS_RESOLVING && |
1190 | entry->shortcut != NULL) { | |
f7d57453 | 1191 | entry->entry_state = INGRESS_RESOLVED; |
1da177e4 LT |
1192 | mpc->in_ops->put(entry); |
1193 | return; /* Shortcut already open... */ | |
1194 | } | |
1195 | ||
1196 | if (entry->shortcut != NULL) { | |
57100440 JP |
1197 | pr_info("(%s) entry->shortcut != NULL, impossible!\n", |
1198 | mpc->dev->name); | |
1da177e4 LT |
1199 | mpc->in_ops->put(entry); |
1200 | return; | |
1201 | } | |
f7d57453 | 1202 | |
1da177e4 LT |
1203 | check_qos_and_open_shortcut(msg, mpc, entry); |
1204 | entry->entry_state = INGRESS_RESOLVED; | |
1205 | mpc->in_ops->put(entry); | |
1206 | ||
1207 | return; | |
1208 | ||
1209 | } | |
1210 | ||
1211 | static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1212 | { | |
30d492da AV |
1213 | __be32 dst_ip = msg->content.in_info.in_dst_ip; |
1214 | __be32 mask = msg->ip_mask; | |
1da177e4 LT |
1215 | in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); |
1216 | ||
57100440 JP |
1217 | if (entry == NULL) { |
1218 | pr_info("(%s) purge for a non-existing entry, ip = %pI4\n", | |
1219 | mpc->dev->name, &dst_ip); | |
1da177e4 LT |
1220 | return; |
1221 | } | |
1222 | ||
1223 | do { | |
b50c2ea7 | 1224 | dprintk("(%s) removing an ingress entry, ip = %pI4\n", |
21454aaa | 1225 | mpc->dev->name, &dst_ip); |
1da177e4 LT |
1226 | write_lock_bh(&mpc->ingress_lock); |
1227 | mpc->in_ops->remove_entry(entry, mpc); | |
1228 | write_unlock_bh(&mpc->ingress_lock); | |
1229 | mpc->in_ops->put(entry); | |
1230 | entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); | |
1231 | } while (entry != NULL); | |
f7d57453 | 1232 | } |
1da177e4 LT |
1233 | |
1234 | static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) | |
1235 | { | |
30d492da | 1236 | __be32 cache_id = msg->content.eg_info.cache_id; |
1da177e4 | 1237 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); |
f7d57453 | 1238 | |
1da177e4 | 1239 | if (entry == NULL) { |
b50c2ea7 | 1240 | dprintk("(%s) purge for a non-existing entry\n", |
57100440 | 1241 | mpc->dev->name); |
1da177e4 LT |
1242 | return; |
1243 | } | |
1244 | ||
1245 | write_lock_irq(&mpc->egress_lock); | |
1246 | mpc->eg_ops->remove_entry(entry, mpc); | |
1247 | write_unlock_irq(&mpc->egress_lock); | |
1248 | ||
1249 | mpc->eg_ops->put(entry); | |
f7d57453 | 1250 | } |
1da177e4 LT |
1251 | |
1252 | static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) | |
1253 | { | |
1254 | struct sock *sk; | |
1255 | struct k_message *purge_msg; | |
1256 | struct sk_buff *skb; | |
1257 | ||
b50c2ea7 | 1258 | dprintk("entering\n"); |
1da177e4 | 1259 | if (vcc == NULL) { |
57100440 | 1260 | pr_info("vcc == NULL\n"); |
1da177e4 LT |
1261 | return; |
1262 | } | |
1263 | ||
1264 | skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); | |
1265 | if (skb == NULL) { | |
57100440 | 1266 | pr_info("out of memory\n"); |
1da177e4 LT |
1267 | return; |
1268 | } | |
1269 | ||
1270 | skb_put(skb, sizeof(struct k_message)); | |
1271 | memset(skb->data, 0, sizeof(struct k_message)); | |
1272 | purge_msg = (struct k_message *)skb->data; | |
1273 | purge_msg->type = DATA_PLANE_PURGE; | |
1274 | if (entry != NULL) | |
1275 | purge_msg->content.eg_info = entry->ctrl_info; | |
1276 | ||
1277 | atm_force_charge(vcc, skb->truesize); | |
1278 | ||
1279 | sk = sk_atm(vcc); | |
1280 | skb_queue_tail(&sk->sk_receive_queue, skb); | |
1281 | sk->sk_data_ready(sk, skb->len); | |
b50c2ea7 | 1282 | dprintk("exiting\n"); |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | /* | |
1286 | * Our MPS died. Tell our daemon to send NHRP data plane purge to each | |
1287 | * of the egress shortcuts we have. | |
1288 | */ | |
57100440 | 1289 | static void mps_death(struct k_message *msg, struct mpoa_client *mpc) |
1da177e4 LT |
1290 | { |
1291 | eg_cache_entry *entry; | |
1292 | ||
b50c2ea7 | 1293 | dprintk("(%s)\n", mpc->dev->name); |
1da177e4 | 1294 | |
57100440 JP |
1295 | if (memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)) { |
1296 | pr_info("(%s) wrong MPS\n", mpc->dev->name); | |
1da177e4 LT |
1297 | return; |
1298 | } | |
1299 | ||
1300 | /* FIXME: This knows too much of the cache structure */ | |
1301 | read_lock_irq(&mpc->egress_lock); | |
1302 | entry = mpc->eg_cache; | |
1303 | while (entry != NULL) { | |
1304 | purge_egress_shortcut(entry->shortcut, entry); | |
1305 | entry = entry->next; | |
1306 | } | |
1307 | read_unlock_irq(&mpc->egress_lock); | |
1308 | ||
1309 | mpc->in_ops->destroy_cache(mpc); | |
1310 | mpc->eg_ops->destroy_cache(mpc); | |
1da177e4 LT |
1311 | } |
1312 | ||
57100440 JP |
1313 | static void MPOA_cache_impos_rcvd(struct k_message *msg, |
1314 | struct mpoa_client *mpc) | |
1da177e4 LT |
1315 | { |
1316 | uint16_t holding_time; | |
1317 | eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); | |
f7d57453 | 1318 | |
1da177e4 | 1319 | holding_time = msg->content.eg_info.holding_time; |
b50c2ea7 | 1320 | dprintk("(%s) entry = %p, holding_time = %u\n", |
57100440 JP |
1321 | mpc->dev->name, entry, holding_time); |
1322 | if (entry == NULL && holding_time) { | |
1da177e4 LT |
1323 | entry = mpc->eg_ops->add_entry(msg, mpc); |
1324 | mpc->eg_ops->put(entry); | |
1325 | return; | |
1326 | } | |
57100440 | 1327 | if (holding_time) { |
1da177e4 LT |
1328 | mpc->eg_ops->update(entry, holding_time); |
1329 | return; | |
1330 | } | |
f7d57453 | 1331 | |
1da177e4 LT |
1332 | write_lock_irq(&mpc->egress_lock); |
1333 | mpc->eg_ops->remove_entry(entry, mpc); | |
1334 | write_unlock_irq(&mpc->egress_lock); | |
1335 | ||
1336 | mpc->eg_ops->put(entry); | |
1da177e4 LT |
1337 | } |
1338 | ||
57100440 JP |
1339 | static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, |
1340 | struct mpoa_client *mpc) | |
1da177e4 LT |
1341 | { |
1342 | struct lec_priv *priv; | |
1343 | int i, retval ; | |
1344 | ||
1345 | uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; | |
1346 | ||
1347 | tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ | |
1348 | tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ | |
1349 | tlv[5] = 0x02; /* MPOA client */ | |
1350 | tlv[6] = 0x00; /* number of MPS MAC addresses */ | |
1351 | ||
1352 | memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ | |
1353 | memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); | |
1354 | ||
b50c2ea7 JP |
1355 | dprintk("(%s) setting MPC ctrl ATM address to", |
1356 | mpc->dev ? mpc->dev->name : "<unknown>"); | |
1da177e4 | 1357 | for (i = 7; i < sizeof(tlv); i++) |
b50c2ea7 JP |
1358 | dprintk_cont(" %02x", tlv[i]); |
1359 | dprintk_cont("\n"); | |
1da177e4 LT |
1360 | |
1361 | if (mpc->dev) { | |
524ad0a7 | 1362 | priv = netdev_priv(mpc->dev); |
57100440 JP |
1363 | retval = priv->lane2_ops->associate_req(mpc->dev, |
1364 | mpc->dev->dev_addr, | |
1365 | tlv, sizeof(tlv)); | |
1da177e4 | 1366 | if (retval == 0) |
57100440 JP |
1367 | pr_info("(%s) MPOA device type TLV association failed\n", |
1368 | mpc->dev->name); | |
1da177e4 LT |
1369 | retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); |
1370 | if (retval < 0) | |
57100440 JP |
1371 | pr_info("(%s) targetless LE_ARP request failed\n", |
1372 | mpc->dev->name); | |
1da177e4 | 1373 | } |
1da177e4 LT |
1374 | } |
1375 | ||
57100440 JP |
1376 | static void set_mps_mac_addr_rcvd(struct k_message *msg, |
1377 | struct mpoa_client *client) | |
1da177e4 LT |
1378 | { |
1379 | ||
57100440 | 1380 | if (client->number_of_mps_macs) |
1da177e4 LT |
1381 | kfree(client->mps_macs); |
1382 | client->number_of_mps_macs = 0; | |
2afe37cd | 1383 | client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); |
1da177e4 | 1384 | if (client->mps_macs == NULL) { |
57100440 | 1385 | pr_info("out of memory\n"); |
1da177e4 LT |
1386 | return; |
1387 | } | |
1388 | client->number_of_mps_macs = 1; | |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | /* | |
1392 | * purge egress cache and tell daemon to 'action' (DIE, RELOAD) | |
1393 | */ | |
1394 | static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) | |
1395 | { | |
1396 | ||
1397 | eg_cache_entry *entry; | |
1398 | msg->type = SND_EGRESS_PURGE; | |
1399 | ||
1400 | ||
1401 | /* FIXME: This knows too much of the cache structure */ | |
1402 | read_lock_irq(&mpc->egress_lock); | |
1403 | entry = mpc->eg_cache; | |
57100440 JP |
1404 | while (entry != NULL) { |
1405 | msg->content.eg_info = entry->ctrl_info; | |
b50c2ea7 | 1406 | dprintk("cache_id %u\n", entry->ctrl_info.cache_id); |
57100440 JP |
1407 | msg_to_mpoad(msg, mpc); |
1408 | entry = entry->next; | |
1da177e4 LT |
1409 | } |
1410 | read_unlock_irq(&mpc->egress_lock); | |
1411 | ||
1412 | msg->type = action; | |
1413 | msg_to_mpoad(msg, mpc); | |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | static void mpc_timer_refresh(void) | |
1417 | { | |
1418 | mpc_timer.expires = jiffies + (MPC_P2 * HZ); | |
1419 | mpc_timer.data = mpc_timer.expires; | |
1420 | mpc_timer.function = mpc_cache_check; | |
1421 | add_timer(&mpc_timer); | |
1da177e4 LT |
1422 | } |
1423 | ||
57100440 | 1424 | static void mpc_cache_check(unsigned long checking_time) |
1da177e4 LT |
1425 | { |
1426 | struct mpoa_client *mpc = mpcs; | |
1427 | static unsigned long previous_resolving_check_time; | |
1428 | static unsigned long previous_refresh_time; | |
f7d57453 | 1429 | |
57100440 | 1430 | while (mpc != NULL) { |
1da177e4 LT |
1431 | mpc->in_ops->clear_count(mpc); |
1432 | mpc->eg_ops->clear_expired(mpc); | |
57100440 JP |
1433 | if (checking_time - previous_resolving_check_time > |
1434 | mpc->parameters.mpc_p4 * HZ) { | |
1da177e4 LT |
1435 | mpc->in_ops->check_resolving(mpc); |
1436 | previous_resolving_check_time = checking_time; | |
1437 | } | |
57100440 JP |
1438 | if (checking_time - previous_refresh_time > |
1439 | mpc->parameters.mpc_p5 * HZ) { | |
1da177e4 LT |
1440 | mpc->in_ops->refresh(mpc); |
1441 | previous_refresh_time = checking_time; | |
1442 | } | |
1443 | mpc = mpc->next; | |
1444 | } | |
1445 | mpc_timer_refresh(); | |
1da177e4 LT |
1446 | } |
1447 | ||
57100440 JP |
1448 | static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, |
1449 | unsigned long arg) | |
1da177e4 LT |
1450 | { |
1451 | int err = 0; | |
1452 | struct atm_vcc *vcc = ATM_SD(sock); | |
1453 | ||
1454 | if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) | |
1455 | return -ENOIOCTLCMD; | |
1456 | ||
1457 | if (!capable(CAP_NET_ADMIN)) | |
1458 | return -EPERM; | |
1459 | ||
1460 | switch (cmd) { | |
57100440 JP |
1461 | case ATMMPC_CTRL: |
1462 | err = atm_mpoa_mpoad_attach(vcc, (int)arg); | |
1463 | if (err >= 0) | |
1464 | sock->state = SS_CONNECTED; | |
1465 | break; | |
1466 | case ATMMPC_DATA: | |
1467 | err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); | |
1468 | break; | |
1469 | default: | |
1470 | break; | |
1da177e4 LT |
1471 | } |
1472 | return err; | |
1473 | } | |
1474 | ||
1da177e4 LT |
1475 | static struct atm_ioctl atm_ioctl_ops = { |
1476 | .owner = THIS_MODULE, | |
1477 | .ioctl = atm_mpoa_ioctl, | |
1478 | }; | |
1479 | ||
1480 | static __init int atm_mpoa_init(void) | |
1481 | { | |
1482 | register_atm_ioctl(&atm_ioctl_ops); | |
1483 | ||
1da177e4 | 1484 | if (mpc_proc_init() != 0) |
99824461 | 1485 | pr_info("failed to initialize /proc/mpoa\n"); |
1da177e4 | 1486 | |
57100440 | 1487 | pr_info("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); |
1da177e4 LT |
1488 | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | static void __exit atm_mpoa_cleanup(void) | |
1493 | { | |
1494 | struct mpoa_client *mpc, *tmp; | |
1495 | struct atm_mpoa_qos *qos, *nextqos; | |
1496 | struct lec_priv *priv; | |
1497 | ||
1da177e4 | 1498 | mpc_proc_clean(); |
1da177e4 LT |
1499 | |
1500 | del_timer(&mpc_timer); | |
1501 | unregister_netdevice_notifier(&mpoa_notifier); | |
1502 | deregister_atm_ioctl(&atm_ioctl_ops); | |
1503 | ||
1504 | mpc = mpcs; | |
1505 | mpcs = NULL; | |
1506 | while (mpc != NULL) { | |
1507 | tmp = mpc->next; | |
1508 | if (mpc->dev != NULL) { | |
1509 | stop_mpc(mpc); | |
524ad0a7 | 1510 | priv = netdev_priv(mpc->dev); |
1da177e4 LT |
1511 | if (priv->lane2_ops != NULL) |
1512 | priv->lane2_ops->associate_indicator = NULL; | |
1513 | } | |
b50c2ea7 | 1514 | ddprintk("about to clear caches\n"); |
1da177e4 LT |
1515 | mpc->in_ops->destroy_cache(mpc); |
1516 | mpc->eg_ops->destroy_cache(mpc); | |
b50c2ea7 | 1517 | ddprintk("caches cleared\n"); |
1da177e4 LT |
1518 | kfree(mpc->mps_macs); |
1519 | memset(mpc, 0, sizeof(struct mpoa_client)); | |
b50c2ea7 | 1520 | ddprintk("about to kfree %p\n", mpc); |
1da177e4 | 1521 | kfree(mpc); |
b50c2ea7 | 1522 | ddprintk("next mpc is at %p\n", tmp); |
1da177e4 LT |
1523 | mpc = tmp; |
1524 | } | |
1525 | ||
1526 | qos = qos_head; | |
1527 | qos_head = NULL; | |
1528 | while (qos != NULL) { | |
1529 | nextqos = qos->next; | |
b50c2ea7 | 1530 | dprintk("freeing qos entry %p\n", qos); |
1da177e4 LT |
1531 | kfree(qos); |
1532 | qos = nextqos; | |
1533 | } | |
1da177e4 LT |
1534 | } |
1535 | ||
1536 | module_init(atm_mpoa_init); | |
1537 | module_exit(atm_mpoa_cleanup); | |
1538 | ||
1539 | MODULE_LICENSE("GPL"); |