7daa53625190769284ecb0586387cba9d7bc5044
[lttng-tools.git] / src / bin / lttng-sessiond / condition-internal.cpp
1 /*
2 * Copyright (C) 2020 Francis Deslauriers <francis.deslauriers@efficios.com>
3 *
4 * SPDX-License-Identifier: LGPL-2.1-only
5 *
6 */
7
8 #include <common/hashtable/utils.hpp>
9 #include <common/hashtable/hashtable.hpp>
10
11 #include <lttng/condition/condition.h>
12 #include <lttng/condition/condition-internal.hpp>
13 #include <lttng/condition/buffer-usage-internal.hpp>
14 #include <lttng/condition/session-consumed-size-internal.hpp>
15 #include <lttng/condition/session-rotation-internal.hpp>
16 #include <lttng/condition/event-rule-matches-internal.hpp>
17 #include <lttng/condition/event-rule-matches.h>
18 #include <lttng/event-rule/event-rule-internal.hpp>
19 #include <lttng/condition/event-rule-matches-internal.hpp>
20 #include "condition-internal.hpp"
21
22 static
23 unsigned long lttng_condition_buffer_usage_hash(
24 const struct lttng_condition *_condition)
25 {
26 unsigned long hash;
27 unsigned long condition_type;
28 struct lttng_condition_buffer_usage *condition;
29
30 condition = container_of(_condition,
31 struct lttng_condition_buffer_usage, parent);
32
33 condition_type = (unsigned long) condition->parent.type;
34 hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
35 if (condition->session_name) {
36 hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
37 }
38 if (condition->channel_name) {
39 hash ^= hash_key_str(condition->channel_name, lttng_ht_seed);
40 }
41 if (condition->domain.set) {
42 hash ^= hash_key_ulong(
43 (void *) condition->domain.type,
44 lttng_ht_seed);
45 }
46 if (condition->threshold_ratio.set) {
47 hash ^= hash_key_u64(&condition->threshold_ratio.value, lttng_ht_seed);
48 } else if (condition->threshold_bytes.set) {
49 uint64_t val;
50
51 val = condition->threshold_bytes.value;
52 hash ^= hash_key_u64(&val, lttng_ht_seed);
53 }
54 return hash;
55 }
56
57 static
58 unsigned long lttng_condition_session_consumed_size_hash(
59 const struct lttng_condition *_condition)
60 {
61 unsigned long hash;
62 unsigned long condition_type =
63 (unsigned long) LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE;
64 struct lttng_condition_session_consumed_size *condition;
65 uint64_t val;
66
67 condition = container_of(_condition,
68 struct lttng_condition_session_consumed_size, parent);
69
70 hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
71 if (condition->session_name) {
72 hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
73 }
74 val = condition->consumed_threshold_bytes.value;
75 hash ^= hash_key_u64(&val, lttng_ht_seed);
76 return hash;
77 }
78
79 static
80 unsigned long lttng_condition_session_rotation_hash(
81 const struct lttng_condition *_condition)
82 {
83 unsigned long hash, condition_type;
84 struct lttng_condition_session_rotation *condition;
85
86 condition = container_of(_condition,
87 struct lttng_condition_session_rotation, parent);
88 condition_type = (unsigned long) condition->parent.type;
89 hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
90 LTTNG_ASSERT(condition->session_name);
91 hash ^= hash_key_str(condition->session_name, lttng_ht_seed);
92 return hash;
93 }
94
95 static unsigned long lttng_condition_event_rule_matches_hash(
96 const struct lttng_condition *condition)
97 {
98 unsigned long hash, condition_type;
99 enum lttng_condition_status condition_status;
100 const struct lttng_event_rule *event_rule;
101
102 condition_type = (unsigned long) condition->type;
103 condition_status = lttng_condition_event_rule_matches_get_rule(
104 condition, &event_rule);
105 LTTNG_ASSERT(condition_status == LTTNG_CONDITION_STATUS_OK);
106
107 hash = hash_key_ulong((void *) condition_type, lttng_ht_seed);
108 return hash ^ lttng_event_rule_hash(event_rule);
109 }
110
111 /*
112 * The lttng_condition hashing code is kept in this file (rather than
113 * condition.c) since it makes use of GPLv2 code (hashtable utils), which we
114 * don't want to link in liblttng-ctl.
115 */
116 unsigned long lttng_condition_hash(const struct lttng_condition *condition)
117 {
118 switch (condition->type) {
119 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
120 case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
121 return lttng_condition_buffer_usage_hash(condition);
122 case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE:
123 return lttng_condition_session_consumed_size_hash(condition);
124 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
125 case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
126 return lttng_condition_session_rotation_hash(condition);
127 case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES:
128 return lttng_condition_event_rule_matches_hash(condition);
129 default:
130 abort();
131 }
132 }
133
134 struct lttng_condition *lttng_condition_copy(const struct lttng_condition *condition)
135 {
136 int ret;
137 struct lttng_payload copy_buffer;
138 struct lttng_condition *copy = NULL;
139
140 lttng_payload_init(&copy_buffer);
141
142 ret = lttng_condition_serialize(condition, &copy_buffer);
143 if (ret < 0) {
144 goto end;
145 }
146
147 {
148 struct lttng_payload_view view =
149 lttng_payload_view_from_payload(
150 &copy_buffer, 0, -1);
151
152 ret = lttng_condition_create_from_payload(
153 &view, &copy);
154 if (ret < 0) {
155 copy = NULL;
156 goto end;
157 }
158 }
159
160 end:
161 lttng_payload_reset(&copy_buffer);
162 return copy;
163 }
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