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a51c328d PL |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* Copyright 2020 NXP */ | |
3 | ||
4 | #include <linux/module.h> | |
5 | #include <linux/types.h> | |
6 | #include <linux/kernel.h> | |
7 | #include <linux/string.h> | |
8 | #include <linux/errno.h> | |
9 | #include <linux/skbuff.h> | |
10 | #include <linux/rtnetlink.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/slab.h> | |
13 | #include <net/act_api.h> | |
14 | #include <net/netlink.h> | |
15 | #include <net/pkt_cls.h> | |
16 | #include <net/tc_act/tc_gate.h> | |
17 | ||
a51c328d PL |
18 | static struct tc_action_ops act_gate_ops; |
19 | ||
20 | static ktime_t gate_get_time(struct tcf_gate *gact) | |
21 | { | |
22 | ktime_t mono = ktime_get(); | |
23 | ||
24 | switch (gact->tk_offset) { | |
25 | case TK_OFFS_MAX: | |
26 | return mono; | |
27 | default: | |
28 | return ktime_mono_to_any(mono, gact->tk_offset); | |
29 | } | |
30 | ||
31 | return KTIME_MAX; | |
32 | } | |
33 | ||
7024339a | 34 | static void gate_get_start_time(struct tcf_gate *gact, ktime_t *start) |
a51c328d PL |
35 | { |
36 | struct tcf_gate_params *param = &gact->param; | |
37 | ktime_t now, base, cycle; | |
38 | u64 n; | |
39 | ||
40 | base = ns_to_ktime(param->tcfg_basetime); | |
41 | now = gate_get_time(gact); | |
42 | ||
43 | if (ktime_after(base, now)) { | |
44 | *start = base; | |
7024339a | 45 | return; |
a51c328d PL |
46 | } |
47 | ||
48 | cycle = param->tcfg_cycletime; | |
49 | ||
a51c328d PL |
50 | n = div64_u64(ktime_sub_ns(now, base), cycle); |
51 | *start = ktime_add_ns(base, (n + 1) * cycle); | |
a51c328d PL |
52 | } |
53 | ||
54 | static void gate_start_timer(struct tcf_gate *gact, ktime_t start) | |
55 | { | |
56 | ktime_t expires; | |
57 | ||
58 | expires = hrtimer_get_expires(&gact->hitimer); | |
59 | if (expires == 0) | |
60 | expires = KTIME_MAX; | |
61 | ||
62 | start = min_t(ktime_t, start, expires); | |
63 | ||
64 | hrtimer_start(&gact->hitimer, start, HRTIMER_MODE_ABS_SOFT); | |
65 | } | |
66 | ||
67 | static enum hrtimer_restart gate_timer_func(struct hrtimer *timer) | |
68 | { | |
69 | struct tcf_gate *gact = container_of(timer, struct tcf_gate, | |
70 | hitimer); | |
71 | struct tcf_gate_params *p = &gact->param; | |
72 | struct tcfg_gate_entry *next; | |
73 | ktime_t close_time, now; | |
74 | ||
75 | spin_lock(&gact->tcf_lock); | |
76 | ||
77 | next = gact->next_entry; | |
78 | ||
79 | /* cycle start, clear pending bit, clear total octets */ | |
80 | gact->current_gate_status = next->gate_state ? GATE_ACT_GATE_OPEN : 0; | |
81 | gact->current_entry_octets = 0; | |
82 | gact->current_max_octets = next->maxoctets; | |
83 | ||
84 | gact->current_close_time = ktime_add_ns(gact->current_close_time, | |
85 | next->interval); | |
86 | ||
87 | close_time = gact->current_close_time; | |
88 | ||
89 | if (list_is_last(&next->list, &p->entries)) | |
90 | next = list_first_entry(&p->entries, | |
91 | struct tcfg_gate_entry, list); | |
92 | else | |
93 | next = list_next_entry(next, list); | |
94 | ||
95 | now = gate_get_time(gact); | |
96 | ||
97 | if (ktime_after(now, close_time)) { | |
98 | ktime_t cycle, base; | |
99 | u64 n; | |
100 | ||
101 | cycle = p->tcfg_cycletime; | |
102 | base = ns_to_ktime(p->tcfg_basetime); | |
103 | n = div64_u64(ktime_sub_ns(now, base), cycle); | |
104 | close_time = ktime_add_ns(base, (n + 1) * cycle); | |
105 | } | |
106 | ||
107 | gact->next_entry = next; | |
108 | ||
109 | hrtimer_set_expires(&gact->hitimer, close_time); | |
110 | ||
111 | spin_unlock(&gact->tcf_lock); | |
112 | ||
113 | return HRTIMER_RESTART; | |
114 | } | |
115 | ||
116 | static int tcf_gate_act(struct sk_buff *skb, const struct tc_action *a, | |
117 | struct tcf_result *res) | |
118 | { | |
119 | struct tcf_gate *gact = to_gate(a); | |
120 | ||
121 | spin_lock(&gact->tcf_lock); | |
122 | ||
123 | tcf_lastuse_update(&gact->tcf_tm); | |
124 | bstats_update(&gact->tcf_bstats, skb); | |
125 | ||
126 | if (unlikely(gact->current_gate_status & GATE_ACT_PENDING)) { | |
127 | spin_unlock(&gact->tcf_lock); | |
128 | return gact->tcf_action; | |
129 | } | |
130 | ||
131 | if (!(gact->current_gate_status & GATE_ACT_GATE_OPEN)) | |
132 | goto drop; | |
133 | ||
134 | if (gact->current_max_octets >= 0) { | |
135 | gact->current_entry_octets += qdisc_pkt_len(skb); | |
136 | if (gact->current_entry_octets > gact->current_max_octets) { | |
137 | gact->tcf_qstats.overlimits++; | |
138 | goto drop; | |
139 | } | |
140 | } | |
141 | ||
142 | spin_unlock(&gact->tcf_lock); | |
143 | ||
144 | return gact->tcf_action; | |
145 | drop: | |
146 | gact->tcf_qstats.drops++; | |
147 | spin_unlock(&gact->tcf_lock); | |
148 | ||
149 | return TC_ACT_SHOT; | |
150 | } | |
151 | ||
152 | static const struct nla_policy entry_policy[TCA_GATE_ENTRY_MAX + 1] = { | |
153 | [TCA_GATE_ENTRY_INDEX] = { .type = NLA_U32 }, | |
154 | [TCA_GATE_ENTRY_GATE] = { .type = NLA_FLAG }, | |
155 | [TCA_GATE_ENTRY_INTERVAL] = { .type = NLA_U32 }, | |
156 | [TCA_GATE_ENTRY_IPV] = { .type = NLA_S32 }, | |
157 | [TCA_GATE_ENTRY_MAX_OCTETS] = { .type = NLA_S32 }, | |
158 | }; | |
159 | ||
160 | static const struct nla_policy gate_policy[TCA_GATE_MAX + 1] = { | |
8140860c JB |
161 | [TCA_GATE_PARMS] = |
162 | NLA_POLICY_EXACT_LEN(sizeof(struct tc_gate)), | |
a51c328d PL |
163 | [TCA_GATE_PRIORITY] = { .type = NLA_S32 }, |
164 | [TCA_GATE_ENTRY_LIST] = { .type = NLA_NESTED }, | |
165 | [TCA_GATE_BASE_TIME] = { .type = NLA_U64 }, | |
166 | [TCA_GATE_CYCLE_TIME] = { .type = NLA_U64 }, | |
167 | [TCA_GATE_CYCLE_TIME_EXT] = { .type = NLA_U64 }, | |
168 | [TCA_GATE_FLAGS] = { .type = NLA_U32 }, | |
169 | [TCA_GATE_CLOCKID] = { .type = NLA_S32 }, | |
170 | }; | |
171 | ||
172 | static int fill_gate_entry(struct nlattr **tb, struct tcfg_gate_entry *entry, | |
173 | struct netlink_ext_ack *extack) | |
174 | { | |
175 | u32 interval = 0; | |
176 | ||
177 | entry->gate_state = nla_get_flag(tb[TCA_GATE_ENTRY_GATE]); | |
178 | ||
179 | if (tb[TCA_GATE_ENTRY_INTERVAL]) | |
180 | interval = nla_get_u32(tb[TCA_GATE_ENTRY_INTERVAL]); | |
181 | ||
182 | if (interval == 0) { | |
183 | NL_SET_ERR_MSG(extack, "Invalid interval for schedule entry"); | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
187 | entry->interval = interval; | |
188 | ||
189 | if (tb[TCA_GATE_ENTRY_IPV]) | |
190 | entry->ipv = nla_get_s32(tb[TCA_GATE_ENTRY_IPV]); | |
191 | else | |
192 | entry->ipv = -1; | |
193 | ||
194 | if (tb[TCA_GATE_ENTRY_MAX_OCTETS]) | |
195 | entry->maxoctets = nla_get_s32(tb[TCA_GATE_ENTRY_MAX_OCTETS]); | |
196 | else | |
197 | entry->maxoctets = -1; | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int parse_gate_entry(struct nlattr *n, struct tcfg_gate_entry *entry, | |
203 | int index, struct netlink_ext_ack *extack) | |
204 | { | |
205 | struct nlattr *tb[TCA_GATE_ENTRY_MAX + 1] = { }; | |
206 | int err; | |
207 | ||
208 | err = nla_parse_nested(tb, TCA_GATE_ENTRY_MAX, n, entry_policy, extack); | |
209 | if (err < 0) { | |
210 | NL_SET_ERR_MSG(extack, "Could not parse nested entry"); | |
211 | return -EINVAL; | |
212 | } | |
213 | ||
214 | entry->index = index; | |
215 | ||
216 | return fill_gate_entry(tb, entry, extack); | |
217 | } | |
218 | ||
219 | static void release_entry_list(struct list_head *entries) | |
220 | { | |
221 | struct tcfg_gate_entry *entry, *e; | |
222 | ||
223 | list_for_each_entry_safe(entry, e, entries, list) { | |
224 | list_del(&entry->list); | |
225 | kfree(entry); | |
226 | } | |
227 | } | |
228 | ||
229 | static int parse_gate_list(struct nlattr *list_attr, | |
230 | struct tcf_gate_params *sched, | |
231 | struct netlink_ext_ack *extack) | |
232 | { | |
233 | struct tcfg_gate_entry *entry; | |
234 | struct nlattr *n; | |
235 | int err, rem; | |
236 | int i = 0; | |
237 | ||
238 | if (!list_attr) | |
239 | return -EINVAL; | |
240 | ||
241 | nla_for_each_nested(n, list_attr, rem) { | |
242 | if (nla_type(n) != TCA_GATE_ONE_ENTRY) { | |
243 | NL_SET_ERR_MSG(extack, "Attribute isn't type 'entry'"); | |
244 | continue; | |
245 | } | |
246 | ||
247 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
248 | if (!entry) { | |
249 | NL_SET_ERR_MSG(extack, "Not enough memory for entry"); | |
250 | err = -ENOMEM; | |
251 | goto release_list; | |
252 | } | |
253 | ||
254 | err = parse_gate_entry(n, entry, i, extack); | |
255 | if (err < 0) { | |
256 | kfree(entry); | |
257 | goto release_list; | |
258 | } | |
259 | ||
260 | list_add_tail(&entry->list, &sched->entries); | |
261 | i++; | |
262 | } | |
263 | ||
264 | sched->num_entries = i; | |
265 | ||
266 | return i; | |
267 | ||
268 | release_list: | |
269 | release_entry_list(&sched->entries); | |
270 | ||
271 | return err; | |
272 | } | |
273 | ||
c362a06e DC |
274 | static void gate_setup_timer(struct tcf_gate *gact, u64 basetime, |
275 | enum tk_offsets tko, s32 clockid, | |
276 | bool do_init) | |
277 | { | |
278 | if (!do_init) { | |
279 | if (basetime == gact->param.tcfg_basetime && | |
280 | tko == gact->tk_offset && | |
281 | clockid == gact->param.tcfg_clockid) | |
282 | return; | |
283 | ||
284 | spin_unlock_bh(&gact->tcf_lock); | |
285 | hrtimer_cancel(&gact->hitimer); | |
286 | spin_lock_bh(&gact->tcf_lock); | |
287 | } | |
288 | gact->param.tcfg_basetime = basetime; | |
289 | gact->param.tcfg_clockid = clockid; | |
290 | gact->tk_offset = tko; | |
291 | hrtimer_init(&gact->hitimer, clockid, HRTIMER_MODE_ABS_SOFT); | |
292 | gact->hitimer.function = gate_timer_func; | |
293 | } | |
294 | ||
a51c328d PL |
295 | static int tcf_gate_init(struct net *net, struct nlattr *nla, |
296 | struct nlattr *est, struct tc_action **a, | |
a51c328d PL |
297 | struct tcf_proto *tp, u32 flags, |
298 | struct netlink_ext_ack *extack) | |
299 | { | |
acd0a7ab | 300 | struct tc_action_net *tn = net_generic(net, act_gate_ops.net_id); |
a51c328d | 301 | enum tk_offsets tk_offset = TK_OFFS_TAI; |
695176bf | 302 | bool bind = flags & TCA_ACT_FLAGS_BIND; |
a51c328d PL |
303 | struct nlattr *tb[TCA_GATE_MAX + 1]; |
304 | struct tcf_chain *goto_ch = NULL; | |
7024339a | 305 | u64 cycletime = 0, basetime = 0; |
a51c328d PL |
306 | struct tcf_gate_params *p; |
307 | s32 clockid = CLOCK_TAI; | |
308 | struct tcf_gate *gact; | |
309 | struct tc_gate *parm; | |
310 | int ret = 0, err; | |
a51c328d PL |
311 | u32 gflags = 0; |
312 | s32 prio = -1; | |
313 | ktime_t start; | |
314 | u32 index; | |
315 | ||
316 | if (!nla) | |
317 | return -EINVAL; | |
318 | ||
319 | err = nla_parse_nested(tb, TCA_GATE_MAX, nla, gate_policy, extack); | |
320 | if (err < 0) | |
321 | return err; | |
322 | ||
323 | if (!tb[TCA_GATE_PARMS]) | |
324 | return -EINVAL; | |
325 | ||
c362a06e DC |
326 | if (tb[TCA_GATE_CLOCKID]) { |
327 | clockid = nla_get_s32(tb[TCA_GATE_CLOCKID]); | |
328 | switch (clockid) { | |
329 | case CLOCK_REALTIME: | |
330 | tk_offset = TK_OFFS_REAL; | |
331 | break; | |
332 | case CLOCK_MONOTONIC: | |
333 | tk_offset = TK_OFFS_MAX; | |
334 | break; | |
335 | case CLOCK_BOOTTIME: | |
336 | tk_offset = TK_OFFS_BOOT; | |
337 | break; | |
338 | case CLOCK_TAI: | |
339 | tk_offset = TK_OFFS_TAI; | |
340 | break; | |
341 | default: | |
342 | NL_SET_ERR_MSG(extack, "Invalid 'clockid'"); | |
343 | return -EINVAL; | |
344 | } | |
345 | } | |
346 | ||
a51c328d PL |
347 | parm = nla_data(tb[TCA_GATE_PARMS]); |
348 | index = parm->index; | |
349 | ||
350 | err = tcf_idr_check_alloc(tn, &index, a, bind); | |
351 | if (err < 0) | |
352 | return err; | |
353 | ||
354 | if (err && bind) | |
355 | return 0; | |
356 | ||
357 | if (!err) { | |
358 | ret = tcf_idr_create(tn, index, est, a, | |
40bd094d | 359 | &act_gate_ops, bind, false, flags); |
a51c328d PL |
360 | if (ret) { |
361 | tcf_idr_cleanup(tn, index); | |
362 | return ret; | |
363 | } | |
364 | ||
365 | ret = ACT_P_CREATED; | |
695176bf | 366 | } else if (!(flags & TCA_ACT_FLAGS_REPLACE)) { |
a51c328d PL |
367 | tcf_idr_release(*a, bind); |
368 | return -EEXIST; | |
369 | } | |
370 | ||
371 | if (tb[TCA_GATE_PRIORITY]) | |
372 | prio = nla_get_s32(tb[TCA_GATE_PRIORITY]); | |
373 | ||
374 | if (tb[TCA_GATE_BASE_TIME]) | |
375 | basetime = nla_get_u64(tb[TCA_GATE_BASE_TIME]); | |
376 | ||
377 | if (tb[TCA_GATE_FLAGS]) | |
378 | gflags = nla_get_u32(tb[TCA_GATE_FLAGS]); | |
379 | ||
c362a06e DC |
380 | gact = to_gate(*a); |
381 | if (ret == ACT_P_CREATED) | |
382 | INIT_LIST_HEAD(&gact->param.entries); | |
a51c328d PL |
383 | |
384 | err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); | |
385 | if (err < 0) | |
386 | goto release_idr; | |
387 | ||
a51c328d PL |
388 | spin_lock_bh(&gact->tcf_lock); |
389 | p = &gact->param; | |
390 | ||
7024339a DC |
391 | if (tb[TCA_GATE_CYCLE_TIME]) |
392 | cycletime = nla_get_u64(tb[TCA_GATE_CYCLE_TIME]); | |
a51c328d | 393 | |
a51c328d PL |
394 | if (tb[TCA_GATE_ENTRY_LIST]) { |
395 | err = parse_gate_list(tb[TCA_GATE_ENTRY_LIST], p, extack); | |
396 | if (err < 0) | |
397 | goto chain_put; | |
398 | } | |
399 | ||
7024339a | 400 | if (!cycletime) { |
a51c328d PL |
401 | struct tcfg_gate_entry *entry; |
402 | ktime_t cycle = 0; | |
403 | ||
404 | list_for_each_entry(entry, &p->entries, list) | |
405 | cycle = ktime_add_ns(cycle, entry->interval); | |
7024339a DC |
406 | cycletime = cycle; |
407 | if (!cycletime) { | |
408 | err = -EINVAL; | |
409 | goto chain_put; | |
410 | } | |
a51c328d | 411 | } |
7024339a | 412 | p->tcfg_cycletime = cycletime; |
a51c328d PL |
413 | |
414 | if (tb[TCA_GATE_CYCLE_TIME_EXT]) | |
415 | p->tcfg_cycletime_ext = | |
416 | nla_get_u64(tb[TCA_GATE_CYCLE_TIME_EXT]); | |
417 | ||
c362a06e DC |
418 | gate_setup_timer(gact, basetime, tk_offset, clockid, |
419 | ret == ACT_P_CREATED); | |
a51c328d | 420 | p->tcfg_priority = prio; |
a51c328d | 421 | p->tcfg_flags = gflags; |
7024339a | 422 | gate_get_start_time(gact, &start); |
a51c328d PL |
423 | |
424 | gact->current_close_time = start; | |
425 | gact->current_gate_status = GATE_ACT_GATE_OPEN | GATE_ACT_PENDING; | |
426 | ||
427 | gact->next_entry = list_first_entry(&p->entries, | |
428 | struct tcfg_gate_entry, list); | |
429 | ||
430 | goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); | |
431 | ||
432 | gate_start_timer(gact, start); | |
433 | ||
434 | spin_unlock_bh(&gact->tcf_lock); | |
435 | ||
436 | if (goto_ch) | |
437 | tcf_chain_put_by_act(goto_ch); | |
438 | ||
a51c328d PL |
439 | return ret; |
440 | ||
441 | chain_put: | |
442 | spin_unlock_bh(&gact->tcf_lock); | |
443 | ||
444 | if (goto_ch) | |
445 | tcf_chain_put_by_act(goto_ch); | |
446 | release_idr: | |
c362a06e DC |
447 | /* action is not inserted in any list: it's safe to init hitimer |
448 | * without taking tcf_lock. | |
449 | */ | |
450 | if (ret == ACT_P_CREATED) | |
451 | gate_setup_timer(gact, gact->param.tcfg_basetime, | |
452 | gact->tk_offset, gact->param.tcfg_clockid, | |
453 | true); | |
a51c328d PL |
454 | tcf_idr_release(*a, bind); |
455 | return err; | |
456 | } | |
457 | ||
458 | static void tcf_gate_cleanup(struct tc_action *a) | |
459 | { | |
460 | struct tcf_gate *gact = to_gate(a); | |
461 | struct tcf_gate_params *p; | |
462 | ||
a51c328d | 463 | p = &gact->param; |
c362a06e | 464 | hrtimer_cancel(&gact->hitimer); |
a51c328d PL |
465 | release_entry_list(&p->entries); |
466 | } | |
467 | ||
468 | static int dumping_entry(struct sk_buff *skb, | |
469 | struct tcfg_gate_entry *entry) | |
470 | { | |
471 | struct nlattr *item; | |
472 | ||
473 | item = nla_nest_start_noflag(skb, TCA_GATE_ONE_ENTRY); | |
474 | if (!item) | |
475 | return -ENOSPC; | |
476 | ||
477 | if (nla_put_u32(skb, TCA_GATE_ENTRY_INDEX, entry->index)) | |
478 | goto nla_put_failure; | |
479 | ||
480 | if (entry->gate_state && nla_put_flag(skb, TCA_GATE_ENTRY_GATE)) | |
481 | goto nla_put_failure; | |
482 | ||
483 | if (nla_put_u32(skb, TCA_GATE_ENTRY_INTERVAL, entry->interval)) | |
484 | goto nla_put_failure; | |
485 | ||
486 | if (nla_put_s32(skb, TCA_GATE_ENTRY_MAX_OCTETS, entry->maxoctets)) | |
487 | goto nla_put_failure; | |
488 | ||
489 | if (nla_put_s32(skb, TCA_GATE_ENTRY_IPV, entry->ipv)) | |
490 | goto nla_put_failure; | |
491 | ||
492 | return nla_nest_end(skb, item); | |
493 | ||
494 | nla_put_failure: | |
495 | nla_nest_cancel(skb, item); | |
496 | return -1; | |
497 | } | |
498 | ||
499 | static int tcf_gate_dump(struct sk_buff *skb, struct tc_action *a, | |
500 | int bind, int ref) | |
501 | { | |
502 | unsigned char *b = skb_tail_pointer(skb); | |
503 | struct tcf_gate *gact = to_gate(a); | |
504 | struct tc_gate opt = { | |
505 | .index = gact->tcf_index, | |
506 | .refcnt = refcount_read(&gact->tcf_refcnt) - ref, | |
507 | .bindcnt = atomic_read(&gact->tcf_bindcnt) - bind, | |
508 | }; | |
509 | struct tcfg_gate_entry *entry; | |
510 | struct tcf_gate_params *p; | |
511 | struct nlattr *entry_list; | |
512 | struct tcf_t t; | |
513 | ||
514 | spin_lock_bh(&gact->tcf_lock); | |
515 | opt.action = gact->tcf_action; | |
516 | ||
517 | p = &gact->param; | |
518 | ||
519 | if (nla_put(skb, TCA_GATE_PARMS, sizeof(opt), &opt)) | |
520 | goto nla_put_failure; | |
521 | ||
522 | if (nla_put_u64_64bit(skb, TCA_GATE_BASE_TIME, | |
523 | p->tcfg_basetime, TCA_GATE_PAD)) | |
524 | goto nla_put_failure; | |
525 | ||
526 | if (nla_put_u64_64bit(skb, TCA_GATE_CYCLE_TIME, | |
527 | p->tcfg_cycletime, TCA_GATE_PAD)) | |
528 | goto nla_put_failure; | |
529 | ||
530 | if (nla_put_u64_64bit(skb, TCA_GATE_CYCLE_TIME_EXT, | |
531 | p->tcfg_cycletime_ext, TCA_GATE_PAD)) | |
532 | goto nla_put_failure; | |
533 | ||
534 | if (nla_put_s32(skb, TCA_GATE_CLOCKID, p->tcfg_clockid)) | |
535 | goto nla_put_failure; | |
536 | ||
537 | if (nla_put_u32(skb, TCA_GATE_FLAGS, p->tcfg_flags)) | |
538 | goto nla_put_failure; | |
539 | ||
540 | if (nla_put_s32(skb, TCA_GATE_PRIORITY, p->tcfg_priority)) | |
541 | goto nla_put_failure; | |
542 | ||
543 | entry_list = nla_nest_start_noflag(skb, TCA_GATE_ENTRY_LIST); | |
544 | if (!entry_list) | |
545 | goto nla_put_failure; | |
546 | ||
547 | list_for_each_entry(entry, &p->entries, list) { | |
548 | if (dumping_entry(skb, entry) < 0) | |
549 | goto nla_put_failure; | |
550 | } | |
551 | ||
552 | nla_nest_end(skb, entry_list); | |
553 | ||
554 | tcf_tm_dump(&t, &gact->tcf_tm); | |
555 | if (nla_put_64bit(skb, TCA_GATE_TM, sizeof(t), &t, TCA_GATE_PAD)) | |
556 | goto nla_put_failure; | |
557 | spin_unlock_bh(&gact->tcf_lock); | |
558 | ||
559 | return skb->len; | |
560 | ||
561 | nla_put_failure: | |
562 | spin_unlock_bh(&gact->tcf_lock); | |
563 | nlmsg_trim(skb, b); | |
564 | return -1; | |
565 | } | |
566 | ||
4b61d3e8 PL |
567 | static void tcf_gate_stats_update(struct tc_action *a, u64 bytes, u64 packets, |
568 | u64 drops, u64 lastuse, bool hw) | |
a51c328d PL |
569 | { |
570 | struct tcf_gate *gact = to_gate(a); | |
571 | struct tcf_t *tm = &gact->tcf_tm; | |
572 | ||
4b61d3e8 | 573 | tcf_action_update_stats(a, bytes, packets, drops, hw); |
a51c328d PL |
574 | tm->lastuse = max_t(u64, tm->lastuse, lastuse); |
575 | } | |
576 | ||
a51c328d PL |
577 | static size_t tcf_gate_get_fill_size(const struct tc_action *act) |
578 | { | |
579 | return nla_total_size(sizeof(struct tc_gate)); | |
580 | } | |
581 | ||
c54e1d92 BZ |
582 | static void tcf_gate_entry_destructor(void *priv) |
583 | { | |
584 | struct action_gate_entry *oe = priv; | |
585 | ||
586 | kfree(oe); | |
587 | } | |
588 | ||
589 | static int tcf_gate_get_entries(struct flow_action_entry *entry, | |
590 | const struct tc_action *act) | |
591 | { | |
592 | entry->gate.entries = tcf_gate_get_list(act); | |
593 | ||
594 | if (!entry->gate.entries) | |
595 | return -EINVAL; | |
596 | ||
597 | entry->destructor = tcf_gate_entry_destructor; | |
598 | entry->destructor_priv = entry->gate.entries; | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | static int tcf_gate_offload_act_setup(struct tc_action *act, void *entry_data, | |
c2ccf84e IS |
604 | u32 *index_inc, bool bind, |
605 | struct netlink_ext_ack *extack) | |
c54e1d92 BZ |
606 | { |
607 | int err; | |
608 | ||
609 | if (bind) { | |
610 | struct flow_action_entry *entry = entry_data; | |
611 | ||
612 | entry->id = FLOW_ACTION_GATE; | |
613 | entry->gate.prio = tcf_gate_prio(act); | |
614 | entry->gate.basetime = tcf_gate_basetime(act); | |
615 | entry->gate.cycletime = tcf_gate_cycletime(act); | |
616 | entry->gate.cycletimeext = tcf_gate_cycletimeext(act); | |
617 | entry->gate.num_entries = tcf_gate_num_entries(act); | |
618 | err = tcf_gate_get_entries(entry, act); | |
619 | if (err) | |
620 | return err; | |
621 | *index_inc = 1; | |
622 | } else { | |
8cbfe939 BZ |
623 | struct flow_offload_action *fl_action = entry_data; |
624 | ||
625 | fl_action->id = FLOW_ACTION_GATE; | |
c54e1d92 BZ |
626 | } |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
a51c328d PL |
631 | static struct tc_action_ops act_gate_ops = { |
632 | .kind = "gate", | |
633 | .id = TCA_ID_GATE, | |
634 | .owner = THIS_MODULE, | |
635 | .act = tcf_gate_act, | |
636 | .dump = tcf_gate_dump, | |
637 | .init = tcf_gate_init, | |
638 | .cleanup = tcf_gate_cleanup, | |
a51c328d PL |
639 | .stats_update = tcf_gate_stats_update, |
640 | .get_fill_size = tcf_gate_get_fill_size, | |
c54e1d92 | 641 | .offload_act_setup = tcf_gate_offload_act_setup, |
a51c328d PL |
642 | .size = sizeof(struct tcf_gate), |
643 | }; | |
644 | ||
645 | static __net_init int gate_init_net(struct net *net) | |
646 | { | |
acd0a7ab | 647 | struct tc_action_net *tn = net_generic(net, act_gate_ops.net_id); |
a51c328d PL |
648 | |
649 | return tc_action_net_init(net, tn, &act_gate_ops); | |
650 | } | |
651 | ||
652 | static void __net_exit gate_exit_net(struct list_head *net_list) | |
653 | { | |
acd0a7ab | 654 | tc_action_net_exit(net_list, act_gate_ops.net_id); |
a51c328d PL |
655 | } |
656 | ||
657 | static struct pernet_operations gate_net_ops = { | |
658 | .init = gate_init_net, | |
659 | .exit_batch = gate_exit_net, | |
acd0a7ab | 660 | .id = &act_gate_ops.net_id, |
a51c328d PL |
661 | .size = sizeof(struct tc_action_net), |
662 | }; | |
663 | ||
664 | static int __init gate_init_module(void) | |
665 | { | |
666 | return tcf_register_action(&act_gate_ops, &gate_net_ops); | |
667 | } | |
668 | ||
669 | static void __exit gate_cleanup_module(void) | |
670 | { | |
671 | tcf_unregister_action(&act_gate_ops, &gate_net_ops); | |
672 | } | |
673 | ||
674 | module_init(gate_init_module); | |
675 | module_exit(gate_cleanup_module); | |
676 | MODULE_LICENSE("GPL v2"); |