]>
Commit | Line | Data |
---|---|---|
2078901a WT |
1 | /* |
2 | * Copyright (c) 2020 VMware, Inc. | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include <errno.h> | |
20 | #include "conntrack-private.h" | |
21 | #include "conntrack-tp.h" | |
22 | #include "ct-dpif.h" | |
23 | #include "openvswitch/vlog.h" | |
24 | ||
25 | VLOG_DEFINE_THIS_MODULE(conntrack_tp); | |
26 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
27 | ||
28 | static const char *ct_timeout_str[] = { | |
29 | #define CT_TIMEOUT(NAME) #NAME, | |
30 | CT_TIMEOUTS | |
31 | #undef CT_TIMEOUT | |
32 | }; | |
33 | ||
34 | /* Default timeout policy in seconds. */ | |
35 | static unsigned int ct_dpif_netdev_tp_def[] = { | |
36 | [CT_DPIF_TP_ATTR_TCP_SYN_SENT] = 30, | |
37 | [CT_DPIF_TP_ATTR_TCP_SYN_RECV] = 30, | |
38 | [CT_DPIF_TP_ATTR_TCP_ESTABLISHED] = 24 * 60 * 60, | |
39 | [CT_DPIF_TP_ATTR_TCP_FIN_WAIT] = 15 * 60, | |
40 | [CT_DPIF_TP_ATTR_TCP_TIME_WAIT] = 45, | |
41 | [CT_DPIF_TP_ATTR_TCP_CLOSE] = 30, | |
42 | [CT_DPIF_TP_ATTR_UDP_FIRST] = 60, | |
43 | [CT_DPIF_TP_ATTR_UDP_SINGLE] = 60, | |
44 | [CT_DPIF_TP_ATTR_UDP_MULTIPLE] = 30, | |
45 | [CT_DPIF_TP_ATTR_ICMP_FIRST] = 60, | |
46 | [CT_DPIF_TP_ATTR_ICMP_REPLY] = 30, | |
47 | }; | |
48 | ||
49 | static struct timeout_policy * | |
50 | timeout_policy_lookup(struct conntrack *ct, int32_t tp_id) | |
51 | OVS_REQUIRES(ct->ct_lock) | |
52 | { | |
53 | struct timeout_policy *tp; | |
54 | uint32_t hash; | |
55 | ||
56 | hash = hash_int(tp_id, ct->hash_basis); | |
57 | HMAP_FOR_EACH_IN_BUCKET (tp, node, hash, &ct->timeout_policies) { | |
58 | if (tp->policy.id == tp_id) { | |
59 | return tp; | |
60 | } | |
61 | } | |
62 | return NULL; | |
63 | } | |
64 | ||
65 | struct timeout_policy * | |
66 | timeout_policy_get(struct conntrack *ct, int32_t tp_id) | |
67 | { | |
68 | struct timeout_policy *tp; | |
69 | ||
70 | ovs_mutex_lock(&ct->ct_lock); | |
71 | tp = timeout_policy_lookup(ct, tp_id); | |
72 | if (!tp) { | |
73 | ovs_mutex_unlock(&ct->ct_lock); | |
74 | return NULL; | |
75 | } | |
76 | ||
77 | ovs_mutex_unlock(&ct->ct_lock); | |
78 | return tp; | |
79 | } | |
80 | ||
81 | static void | |
82 | update_existing_tp(struct timeout_policy *tp_dst, | |
83 | const struct timeout_policy *tp_src) | |
84 | { | |
85 | struct ct_dpif_timeout_policy *dst; | |
86 | const struct ct_dpif_timeout_policy *src; | |
87 | int i; | |
88 | ||
89 | dst = &tp_dst->policy; | |
90 | src = &tp_src->policy; | |
91 | ||
92 | /* Set the value and present bit to dst if present | |
93 | * bit in src is set. | |
94 | */ | |
95 | for (i = 0; i < ARRAY_SIZE(dst->attrs); i++) { | |
96 | if (src->present & (1 << i)) { | |
97 | dst->attrs[i] = src->attrs[i]; | |
98 | dst->present |= (1 << i); | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
103 | static void | |
104 | init_default_tp(struct timeout_policy *tp, uint32_t tp_id) | |
105 | { | |
106 | tp->policy.id = tp_id; | |
107 | /* Initialize the timeout value to default, but not | |
108 | * setting the present bit. | |
109 | */ | |
110 | tp->policy.present = 0; | |
111 | memcpy(tp->policy.attrs, ct_dpif_netdev_tp_def, | |
112 | sizeof tp->policy.attrs); | |
113 | } | |
114 | ||
115 | static void | |
116 | timeout_policy_create(struct conntrack *ct, | |
117 | struct timeout_policy *new_tp) | |
118 | OVS_REQUIRES(ct->ct_lock) | |
119 | { | |
120 | uint32_t tp_id = new_tp->policy.id; | |
121 | struct timeout_policy *tp; | |
122 | uint32_t hash; | |
123 | ||
124 | tp = xzalloc(sizeof *tp); | |
125 | init_default_tp(tp, tp_id); | |
126 | update_existing_tp(tp, new_tp); | |
127 | hash = hash_int(tp_id, ct->hash_basis); | |
128 | hmap_insert(&ct->timeout_policies, &tp->node, hash); | |
129 | } | |
130 | ||
131 | static void | |
132 | timeout_policy_clean(struct conntrack *ct, struct timeout_policy *tp) | |
133 | OVS_REQUIRES(ct->ct_lock) | |
134 | { | |
135 | hmap_remove(&ct->timeout_policies, &tp->node); | |
136 | free(tp); | |
137 | } | |
138 | ||
139 | static int | |
140 | timeout_policy_delete__(struct conntrack *ct, uint32_t tp_id) | |
141 | OVS_REQUIRES(ct->ct_lock) | |
142 | { | |
143 | int err = 0; | |
144 | struct timeout_policy *tp = timeout_policy_lookup(ct, tp_id); | |
145 | ||
146 | if (tp) { | |
147 | timeout_policy_clean(ct, tp); | |
148 | } else { | |
149 | VLOG_WARN_RL(&rl, "Failed to delete a non-existent timeout " | |
150 | "policy: id=%d", tp_id); | |
151 | err = ENOENT; | |
152 | } | |
153 | return err; | |
154 | } | |
155 | ||
156 | int | |
157 | timeout_policy_delete(struct conntrack *ct, uint32_t tp_id) | |
158 | { | |
159 | int err; | |
160 | ||
161 | ovs_mutex_lock(&ct->ct_lock); | |
162 | err = timeout_policy_delete__(ct, tp_id); | |
163 | ovs_mutex_unlock(&ct->ct_lock); | |
164 | return err; | |
165 | } | |
166 | ||
167 | void | |
168 | timeout_policy_init(struct conntrack *ct) | |
169 | OVS_REQUIRES(ct->ct_lock) | |
170 | { | |
171 | struct timeout_policy tp; | |
172 | ||
173 | hmap_init(&ct->timeout_policies); | |
174 | ||
175 | /* Create default timeout policy. */ | |
176 | memset(&tp, 0, sizeof tp); | |
177 | tp.policy.id = DEFAULT_TP_ID; | |
178 | timeout_policy_create(ct, &tp); | |
179 | } | |
180 | ||
181 | int | |
182 | timeout_policy_update(struct conntrack *ct, | |
183 | struct timeout_policy *new_tp) | |
184 | { | |
185 | int err = 0; | |
186 | uint32_t tp_id = new_tp->policy.id; | |
187 | ||
188 | ovs_mutex_lock(&ct->ct_lock); | |
189 | struct timeout_policy *tp = timeout_policy_lookup(ct, tp_id); | |
190 | if (tp) { | |
191 | err = timeout_policy_delete__(ct, tp_id); | |
192 | } | |
193 | timeout_policy_create(ct, new_tp); | |
194 | ovs_mutex_unlock(&ct->ct_lock); | |
195 | return err; | |
196 | } | |
197 | ||
198 | static enum ct_dpif_tp_attr | |
199 | tm_to_ct_dpif_tp(enum ct_timeout tm) | |
200 | { | |
201 | switch (tm) { | |
202 | case CT_TM_TCP_FIRST_PACKET: | |
203 | return CT_DPIF_TP_ATTR_TCP_SYN_SENT; | |
204 | case CT_TM_TCP_OPENING: | |
205 | return CT_DPIF_TP_ATTR_TCP_SYN_RECV; | |
206 | case CT_TM_TCP_ESTABLISHED: | |
207 | return CT_DPIF_TP_ATTR_TCP_ESTABLISHED; | |
208 | case CT_TM_TCP_CLOSING: | |
209 | return CT_DPIF_TP_ATTR_TCP_FIN_WAIT; | |
210 | case CT_TM_TCP_FIN_WAIT: | |
211 | return CT_DPIF_TP_ATTR_TCP_TIME_WAIT; | |
212 | case CT_TM_TCP_CLOSED: | |
213 | return CT_DPIF_TP_ATTR_TCP_CLOSE; | |
214 | case CT_TM_OTHER_FIRST: | |
215 | return CT_DPIF_TP_ATTR_UDP_FIRST; | |
216 | case CT_TM_OTHER_BIDIR: | |
217 | return CT_DPIF_TP_ATTR_UDP_MULTIPLE; | |
218 | case CT_TM_OTHER_MULTIPLE: | |
219 | return CT_DPIF_TP_ATTR_UDP_SINGLE; | |
220 | case CT_TM_ICMP_FIRST: | |
221 | return CT_DPIF_TP_ATTR_ICMP_FIRST; | |
222 | case CT_TM_ICMP_REPLY: | |
223 | return CT_DPIF_TP_ATTR_ICMP_REPLY; | |
224 | case N_CT_TM: | |
225 | default: | |
226 | OVS_NOT_REACHED(); | |
227 | break; | |
228 | } | |
229 | OVS_NOT_REACHED(); | |
230 | return CT_DPIF_TP_ATTR_MAX; | |
231 | } | |
232 | ||
233 | static void | |
234 | conn_update_expiration__(struct conntrack *ct, struct conn *conn, | |
235 | enum ct_timeout tm, long long now, | |
236 | uint32_t tp_value) | |
237 | OVS_REQUIRES(conn->lock) | |
238 | { | |
239 | ovs_mutex_unlock(&conn->lock); | |
240 | ||
241 | ovs_mutex_lock(&ct->ct_lock); | |
242 | ovs_mutex_lock(&conn->lock); | |
243 | if (!conn->cleaned) { | |
244 | conn->expiration = now + tp_value * 1000; | |
245 | ovs_list_remove(&conn->exp_node); | |
246 | ovs_list_push_back(&ct->exp_lists[tm], &conn->exp_node); | |
247 | } | |
248 | ovs_mutex_unlock(&conn->lock); | |
249 | ovs_mutex_unlock(&ct->ct_lock); | |
250 | ||
251 | ovs_mutex_lock(&conn->lock); | |
252 | } | |
253 | ||
254 | /* The conn entry lock must be held on entry and exit. */ | |
255 | void | |
256 | conn_update_expiration(struct conntrack *ct, struct conn *conn, | |
257 | enum ct_timeout tm, long long now) | |
258 | OVS_REQUIRES(conn->lock) | |
259 | { | |
260 | struct timeout_policy *tp; | |
261 | uint32_t val; | |
262 | ||
e7fac43b PH |
263 | ovs_mutex_unlock(&conn->lock); |
264 | ||
2078901a | 265 | ovs_mutex_lock(&ct->ct_lock); |
e7fac43b | 266 | ovs_mutex_lock(&conn->lock); |
2078901a WT |
267 | tp = timeout_policy_lookup(ct, conn->tp_id); |
268 | if (tp) { | |
269 | val = tp->policy.attrs[tm_to_ct_dpif_tp(tm)]; | |
270 | } else { | |
271 | val = ct_dpif_netdev_tp_def[tm_to_ct_dpif_tp(tm)]; | |
272 | } | |
e7fac43b | 273 | ovs_mutex_unlock(&conn->lock); |
2078901a WT |
274 | ovs_mutex_unlock(&ct->ct_lock); |
275 | ||
e7fac43b | 276 | ovs_mutex_lock(&conn->lock); |
2078901a WT |
277 | VLOG_DBG_RL(&rl, "Update timeout %s zone=%u with policy id=%d " |
278 | "val=%u sec.", | |
279 | ct_timeout_str[tm], conn->key.zone, conn->tp_id, val); | |
280 | ||
281 | conn_update_expiration__(ct, conn, tm, now, val); | |
282 | } | |
283 | ||
284 | static void | |
285 | conn_init_expiration__(struct conntrack *ct, struct conn *conn, | |
286 | enum ct_timeout tm, long long now, | |
287 | uint32_t tp_value) | |
288 | { | |
289 | conn->expiration = now + tp_value * 1000; | |
290 | ovs_list_push_back(&ct->exp_lists[tm], &conn->exp_node); | |
291 | } | |
292 | ||
293 | /* ct_lock must be held. */ | |
294 | void | |
295 | conn_init_expiration(struct conntrack *ct, struct conn *conn, | |
296 | enum ct_timeout tm, long long now) | |
297 | OVS_REQUIRES(ct->ct_lock) | |
298 | { | |
299 | struct timeout_policy *tp; | |
300 | uint32_t val; | |
301 | ||
302 | tp = timeout_policy_lookup(ct, conn->tp_id); | |
303 | if (tp) { | |
304 | val = tp->policy.attrs[tm_to_ct_dpif_tp(tm)]; | |
305 | } else { | |
306 | val = ct_dpif_netdev_tp_def[tm_to_ct_dpif_tp(tm)]; | |
307 | } | |
308 | ||
309 | VLOG_DBG_RL(&rl, "Init timeout %s zone=%u with policy id=%d val=%u sec.", | |
310 | ct_timeout_str[tm], conn->key.zone, conn->tp_id, val); | |
311 | ||
312 | conn_init_expiration__(ct, conn, tm, now, val); | |
313 | } |