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e98a976a FD |
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.h> | |
9 | #include <common/hashtable/hashtable.h> | |
10 | ||
11 | #include <lttng/condition/condition.h> | |
12 | #include <lttng/condition/condition-internal.h> | |
13 | #include <lttng/condition/buffer-usage-internal.h> | |
14 | #include <lttng/condition/session-consumed-size-internal.h> | |
15 | #include <lttng/condition/session-rotation-internal.h> | |
670a26e4 JR |
16 | #include <lttng/condition/event-rule-matches-internal.h> |
17 | #include <lttng/condition/event-rule-matches.h> | |
e98a976a | 18 | #include <lttng/event-rule/event-rule-internal.h> |
670a26e4 | 19 | #include <lttng/condition/event-rule-matches-internal.h> |
e98a976a FD |
20 | #include "condition-internal.h" |
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 | uint64_t val; | |
48 | ||
49 | val = condition->threshold_ratio.value * (double) UINT32_MAX; | |
50 | hash ^= hash_key_u64(&val, lttng_ht_seed); | |
51 | } else if (condition->threshold_bytes.set) { | |
52 | uint64_t val; | |
53 | ||
54 | val = condition->threshold_bytes.value; | |
55 | hash ^= hash_key_u64(&val, lttng_ht_seed); | |
56 | } | |
57 | return hash; | |
58 | } | |
59 | ||
60 | static | |
61 | unsigned long lttng_condition_session_consumed_size_hash( | |
62 | const struct lttng_condition *_condition) | |
63 | { | |
64 | unsigned long hash; | |
65 | unsigned long condition_type = | |
66 | (unsigned long) LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE; | |
67 | struct lttng_condition_session_consumed_size *condition; | |
68 | uint64_t val; | |
69 | ||
70 | condition = container_of(_condition, | |
71 | struct lttng_condition_session_consumed_size, parent); | |
72 | ||
73 | hash = hash_key_ulong((void *) condition_type, lttng_ht_seed); | |
74 | if (condition->session_name) { | |
75 | hash ^= hash_key_str(condition->session_name, lttng_ht_seed); | |
76 | } | |
77 | val = condition->consumed_threshold_bytes.value; | |
78 | hash ^= hash_key_u64(&val, lttng_ht_seed); | |
79 | return hash; | |
80 | } | |
81 | ||
82 | static | |
83 | unsigned long lttng_condition_session_rotation_hash( | |
84 | const struct lttng_condition *_condition) | |
85 | { | |
86 | unsigned long hash, condition_type; | |
87 | struct lttng_condition_session_rotation *condition; | |
88 | ||
89 | condition = container_of(_condition, | |
90 | struct lttng_condition_session_rotation, parent); | |
91 | condition_type = (unsigned long) condition->parent.type; | |
92 | hash = hash_key_ulong((void *) condition_type, lttng_ht_seed); | |
93 | assert(condition->session_name); | |
94 | hash ^= hash_key_str(condition->session_name, lttng_ht_seed); | |
95 | return hash; | |
96 | } | |
97 | ||
8dbb86b8 JR |
98 | static unsigned long lttng_condition_event_rule_matches_hash( |
99 | const struct lttng_condition *condition) | |
e98a976a FD |
100 | { |
101 | unsigned long hash, condition_type; | |
102 | enum lttng_condition_status condition_status; | |
103 | const struct lttng_event_rule *event_rule; | |
104 | ||
105 | condition_type = (unsigned long) condition->type; | |
8dbb86b8 JR |
106 | condition_status = lttng_condition_event_rule_matches_get_rule( |
107 | condition, &event_rule); | |
e98a976a FD |
108 | assert(condition_status == LTTNG_CONDITION_STATUS_OK); |
109 | ||
110 | hash = hash_key_ulong((void *) condition_type, lttng_ht_seed); | |
111 | return hash ^ lttng_event_rule_hash(event_rule); | |
112 | } | |
113 | ||
114 | /* | |
115 | * The lttng_condition hashing code is kept in this file (rather than | |
116 | * condition.c) since it makes use of GPLv2 code (hashtable utils), which we | |
117 | * don't want to link in liblttng-ctl. | |
118 | */ | |
119 | unsigned long lttng_condition_hash(const struct lttng_condition *condition) | |
120 | { | |
121 | switch (condition->type) { | |
122 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW: | |
123 | case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH: | |
124 | return lttng_condition_buffer_usage_hash(condition); | |
125 | case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: | |
126 | return lttng_condition_session_consumed_size_hash(condition); | |
127 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: | |
128 | case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: | |
129 | return lttng_condition_session_rotation_hash(condition); | |
8dbb86b8 JR |
130 | case LTTNG_CONDITION_TYPE_EVENT_RULE_MATCHES: |
131 | return lttng_condition_event_rule_matches_hash(condition); | |
e98a976a FD |
132 | default: |
133 | //ERR("[notification-thread] Unexpected condition type caught"); | |
134 | abort(); | |
135 | } | |
136 | } | |
091fa780 FD |
137 | |
138 | LTTNG_HIDDEN | |
139 | struct lttng_condition *lttng_condition_copy(const struct lttng_condition *condition) | |
140 | { | |
141 | int ret; | |
142 | struct lttng_payload copy_buffer; | |
143 | struct lttng_condition *copy = NULL; | |
144 | ||
145 | lttng_payload_init(©_buffer); | |
146 | ||
147 | ret = lttng_condition_serialize(condition, ©_buffer); | |
148 | if (ret < 0) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | { | |
153 | struct lttng_payload_view view = | |
154 | lttng_payload_view_from_payload( | |
155 | ©_buffer, 0, -1); | |
156 | ||
157 | ret = lttng_condition_create_from_payload( | |
158 | &view, ©); | |
159 | if (ret < 0) { | |
160 | copy = NULL; | |
161 | goto end; | |
162 | } | |
163 | } | |
164 | ||
165 | end: | |
166 | lttng_payload_reset(©_buffer); | |
167 | return copy; | |
168 | } |