Commit | Line | Data |
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5e96a467 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
5e96a467 MD |
3 | * |
4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5e96a467 MD |
5 | */ |
6 | ||
3fbec7dc | 7 | #define _LGPL_SOURCE |
fb31eb73 | 8 | #include <stdint.h> |
b4051ad8 | 9 | #include <stddef.h> |
5e96a467 | 10 | #include <stdlib.h> |
bb7ad29d | 11 | |
b62f8205 | 12 | #include "context-internal.h" |
36c52fff | 13 | #include "lib/lttng-ust/events.h" |
9d315d6d | 14 | #include "common/logging.h" |
797b05f6 | 15 | #include "lttng-tracer-core.h" |
f27f1026 MD |
16 | #include "lttng-rb-clients.h" |
17 | #include "lttng-counter-client.h" | |
e58e5ad5 | 18 | #include "common/jhash.h" |
5e96a467 | 19 | |
7dd08bec | 20 | static CDS_LIST_HEAD(lttng_transport_list); |
ebabbf58 | 21 | static CDS_LIST_HEAD(lttng_counter_transport_list); |
c1fca457 | 22 | |
65c48d6a | 23 | struct lttng_transport *lttng_ust_transport_find(const char *name) |
c1fca457 | 24 | { |
7dd08bec | 25 | struct lttng_transport *transport; |
c1fca457 | 26 | |
7dd08bec | 27 | cds_list_for_each_entry(transport, <tng_transport_list, node) { |
c1fca457 MD |
28 | if (!strcmp(transport->name, name)) |
29 | return transport; | |
30 | } | |
31 | return NULL; | |
32 | } | |
33 | ||
ebabbf58 MD |
34 | struct lttng_counter_transport *lttng_counter_transport_find(const char *name) |
35 | { | |
36 | struct lttng_counter_transport *transport; | |
37 | ||
38 | cds_list_for_each_entry(transport, <tng_counter_transport_list, node) { | |
39 | if (!strcmp(transport->name, name)) | |
40 | return transport; | |
41 | } | |
42 | return NULL; | |
43 | } | |
44 | ||
c1fca457 | 45 | /** |
7dd08bec | 46 | * lttng_transport_register - LTT transport registration |
c1fca457 MD |
47 | * @transport: transport structure |
48 | * | |
49 | * Registers a transport which can be used as output to extract the data out of | |
50 | * LTTng. Called with ust_lock held. | |
51 | */ | |
7dd08bec | 52 | void lttng_transport_register(struct lttng_transport *transport) |
c1fca457 | 53 | { |
7dd08bec | 54 | cds_list_add_tail(&transport->node, <tng_transport_list); |
c1fca457 MD |
55 | } |
56 | ||
57 | /** | |
7dd08bec | 58 | * lttng_transport_unregister - LTT transport unregistration |
c1fca457 MD |
59 | * @transport: transport structure |
60 | * Called with ust_lock held. | |
61 | */ | |
7dd08bec | 62 | void lttng_transport_unregister(struct lttng_transport *transport) |
c1fca457 MD |
63 | { |
64 | cds_list_del(&transport->node); | |
65 | } | |
c785c634 | 66 | |
ebabbf58 MD |
67 | /** |
68 | * lttng_counter_transport_register - LTTng counter transport registration | |
69 | * @transport: transport structure | |
70 | * | |
71 | * Registers a counter transport which can be used as output to extract | |
72 | * the data out of LTTng. Called with ust_lock held. | |
73 | */ | |
74 | void lttng_counter_transport_register(struct lttng_counter_transport *transport) | |
75 | { | |
76 | cds_list_add_tail(&transport->node, <tng_counter_transport_list); | |
77 | } | |
78 | ||
79 | /** | |
80 | * lttng_counter_transport_unregister - LTTng counter transport unregistration | |
81 | * @transport: transport structure | |
82 | * Called with ust_lock held. | |
83 | */ | |
84 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport) | |
85 | { | |
86 | cds_list_del(&transport->node); | |
87 | } | |
88 | ||
c785c634 MD |
89 | /* |
90 | * Needed by comm layer. | |
91 | */ | |
f69fe5fb | 92 | struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session, |
4e48b5d2 | 93 | const struct lttng_ust_enum_desc *enum_desc) |
c785c634 MD |
94 | { |
95 | struct lttng_enum *_enum; | |
96 | struct cds_hlist_head *head; | |
97 | struct cds_hlist_node *node; | |
b33b46f7 | 98 | size_t name_len = strlen(enum_desc->name); |
c785c634 MD |
99 | uint32_t hash; |
100 | ||
b33b46f7 | 101 | hash = jhash(enum_desc->name, name_len, 0); |
bdb12629 | 102 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
c785c634 MD |
103 | cds_hlist_for_each_entry(_enum, node, head, hlist) { |
104 | assert(_enum->desc); | |
b33b46f7 | 105 | if (_enum->desc == enum_desc) |
c785c634 MD |
106 | return _enum; |
107 | } | |
108 | return NULL; | |
109 | } | |
797b05f6 | 110 | |
4e48b5d2 | 111 | size_t lttng_ust_dummy_get_size(void *priv __attribute__((unused)), |
2208d8b5 | 112 | size_t offset) |
797b05f6 MD |
113 | { |
114 | size_t size = 0; | |
115 | ||
dc325c1d | 116 | size += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(char)); |
797b05f6 MD |
117 | size += sizeof(char); /* tag */ |
118 | return size; | |
119 | } | |
120 | ||
4e48b5d2 | 121 | void lttng_ust_dummy_record(void *priv __attribute__((unused)), |
797b05f6 | 122 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
e7bc0ef6 | 123 | struct lttng_ust_channel_buffer *chan) |
797b05f6 MD |
124 | { |
125 | char sel_char = (char) LTTNG_UST_DYNAMIC_TYPE_NONE; | |
126 | ||
8936b6c0 | 127 | chan->ops->event_write(ctx, &sel_char, sizeof(sel_char), lttng_ust_rb_alignof(sel_char)); |
797b05f6 MD |
128 | } |
129 | ||
4e48b5d2 | 130 | void lttng_ust_dummy_get_value(void *priv __attribute__((unused)), |
daacdbfc | 131 | struct lttng_ust_ctx_value *value) |
797b05f6 MD |
132 | { |
133 | value->sel = LTTNG_UST_DYNAMIC_TYPE_NONE; | |
134 | } | |
ce47f5d8 MD |
135 | |
136 | int lttng_context_is_app(const char *name) | |
137 | { | |
138 | if (strncmp(name, "$app.", strlen("$app.")) != 0) { | |
139 | return 0; | |
140 | } | |
141 | return 1; | |
142 | } | |
e7bc0ef6 MD |
143 | |
144 | struct lttng_ust_channel_buffer *lttng_ust_alloc_channel_buffer(void) | |
145 | { | |
146 | struct lttng_ust_channel_buffer *lttng_chan_buf; | |
147 | struct lttng_ust_channel_common *lttng_chan_common; | |
148 | struct lttng_ust_channel_buffer_private *lttng_chan_buf_priv; | |
149 | ||
150 | lttng_chan_buf = zmalloc(sizeof(struct lttng_ust_channel_buffer)); | |
151 | if (!lttng_chan_buf) | |
152 | goto lttng_chan_buf_error; | |
153 | lttng_chan_buf->struct_size = sizeof(struct lttng_ust_channel_buffer); | |
154 | lttng_chan_common = zmalloc(sizeof(struct lttng_ust_channel_common)); | |
155 | if (!lttng_chan_common) | |
156 | goto lttng_chan_common_error; | |
157 | lttng_chan_common->struct_size = sizeof(struct lttng_ust_channel_common); | |
158 | lttng_chan_buf_priv = zmalloc(sizeof(struct lttng_ust_channel_buffer_private)); | |
159 | if (!lttng_chan_buf_priv) | |
160 | goto lttng_chan_buf_priv_error; | |
161 | lttng_chan_buf->parent = lttng_chan_common; | |
162 | lttng_chan_common->type = LTTNG_UST_CHANNEL_TYPE_BUFFER; | |
163 | lttng_chan_common->child = lttng_chan_buf; | |
164 | lttng_chan_buf->priv = lttng_chan_buf_priv; | |
165 | lttng_chan_common->priv = <tng_chan_buf_priv->parent; | |
166 | lttng_chan_buf_priv->pub = lttng_chan_buf; | |
167 | lttng_chan_buf_priv->parent.pub = lttng_chan_common; | |
168 | ||
169 | return lttng_chan_buf; | |
170 | ||
171 | lttng_chan_buf_priv_error: | |
172 | free(lttng_chan_common); | |
173 | lttng_chan_common_error: | |
174 | free(lttng_chan_buf); | |
175 | lttng_chan_buf_error: | |
176 | return NULL; | |
177 | } | |
178 | ||
179 | void lttng_ust_free_channel_common(struct lttng_ust_channel_common *chan) | |
180 | { | |
181 | switch (chan->type) { | |
182 | case LTTNG_UST_CHANNEL_TYPE_BUFFER: | |
183 | { | |
184 | struct lttng_ust_channel_buffer *chan_buf; | |
185 | ||
186 | chan_buf = (struct lttng_ust_channel_buffer *)chan->child; | |
187 | free(chan_buf->parent); | |
188 | free(chan_buf->priv); | |
189 | free(chan_buf); | |
190 | break; | |
191 | } | |
192 | default: | |
193 | abort(); | |
194 | } | |
195 | } | |
f27f1026 MD |
196 | |
197 | void lttng_ust_ring_buffer_clients_init(void) | |
198 | { | |
199 | lttng_ring_buffer_metadata_client_init(); | |
200 | lttng_ring_buffer_client_overwrite_init(); | |
201 | lttng_ring_buffer_client_overwrite_rt_init(); | |
202 | lttng_ring_buffer_client_discard_init(); | |
203 | lttng_ring_buffer_client_discard_rt_init(); | |
204 | } | |
205 | ||
206 | void lttng_ust_ring_buffer_clients_exit(void) | |
207 | { | |
208 | lttng_ring_buffer_client_discard_rt_exit(); | |
209 | lttng_ring_buffer_client_discard_exit(); | |
210 | lttng_ring_buffer_client_overwrite_rt_exit(); | |
211 | lttng_ring_buffer_client_overwrite_exit(); | |
212 | lttng_ring_buffer_metadata_client_exit(); | |
213 | } | |
214 | ||
215 | void lttng_ust_counter_clients_init(void) | |
216 | { | |
217 | lttng_counter_client_percpu_64_modular_init(); | |
218 | lttng_counter_client_percpu_32_modular_init(); | |
219 | } | |
220 | ||
221 | void lttng_ust_counter_clients_exit(void) | |
222 | { | |
223 | lttng_counter_client_percpu_32_modular_exit(); | |
224 | lttng_counter_client_percpu_64_modular_exit(); | |
225 | } |