| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; only version 2 |
| 7 | * of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef _LTT_TRACE_H |
| 20 | #define _LTT_TRACE_H |
| 21 | |
| 22 | #include <limits.h> |
| 23 | #include <urcu/list.h> |
| 24 | |
| 25 | #include <lttng/lttng.h> |
| 26 | |
| 27 | #include "lttng-kernel.h" |
| 28 | |
| 29 | /* Kernel event list */ |
| 30 | struct ltt_kernel_event_list { |
| 31 | struct cds_list_head head; |
| 32 | }; |
| 33 | |
| 34 | /* Channel stream list */ |
| 35 | struct ltt_kernel_stream_list { |
| 36 | struct cds_list_head head; |
| 37 | }; |
| 38 | |
| 39 | /* Channel list */ |
| 40 | struct ltt_kernel_channel_list { |
| 41 | struct cds_list_head head; |
| 42 | }; |
| 43 | |
| 44 | /* Kernel event */ |
| 45 | struct ltt_kernel_event { |
| 46 | int fd; |
| 47 | int enabled; |
| 48 | struct lttng_kernel_context *ctx; |
| 49 | struct lttng_kernel_event *event; |
| 50 | struct cds_list_head list; |
| 51 | }; |
| 52 | |
| 53 | /* Kernel channel */ |
| 54 | struct ltt_kernel_channel { |
| 55 | int fd; |
| 56 | int enabled; |
| 57 | char *pathname; |
| 58 | unsigned int stream_count; |
| 59 | unsigned int event_count; |
| 60 | struct lttng_kernel_context *ctx; |
| 61 | struct lttng_channel *channel; |
| 62 | struct ltt_kernel_event_list events_list; |
| 63 | struct ltt_kernel_stream_list stream_list; |
| 64 | struct cds_list_head list; |
| 65 | }; |
| 66 | |
| 67 | /* Metadata */ |
| 68 | struct ltt_kernel_metadata { |
| 69 | int fd; |
| 70 | char *pathname; |
| 71 | struct lttng_channel *conf; |
| 72 | }; |
| 73 | |
| 74 | /* Channel stream */ |
| 75 | struct ltt_kernel_stream { |
| 76 | int fd; |
| 77 | char *pathname; |
| 78 | int state; |
| 79 | struct cds_list_head list; |
| 80 | }; |
| 81 | |
| 82 | /* Kernel session */ |
| 83 | struct ltt_kernel_session { |
| 84 | int fd; |
| 85 | int metadata_stream_fd; |
| 86 | int kconsumer_fds_sent; |
| 87 | int consumer_fd; |
| 88 | unsigned int channel_count; |
| 89 | unsigned int stream_count_global; |
| 90 | char *trace_path; |
| 91 | struct ltt_kernel_metadata *metadata; |
| 92 | struct ltt_kernel_channel_list channel_list; |
| 93 | }; |
| 94 | |
| 95 | /* UST trace representation */ |
| 96 | struct ltt_ust_trace { |
| 97 | struct cds_list_head list; |
| 98 | char name[NAME_MAX]; |
| 99 | int shmid; |
| 100 | pid_t pid; |
| 101 | struct cds_list_head markers; |
| 102 | }; |
| 103 | |
| 104 | struct ltt_ust_marker { |
| 105 | struct cds_list_head list; |
| 106 | char *name; |
| 107 | char *channel; |
| 108 | }; |
| 109 | |
| 110 | /* |
| 111 | * Get functions. |
| 112 | */ |
| 113 | struct ltt_kernel_event *get_kernel_event_by_name( |
| 114 | char *name, struct ltt_kernel_channel *channel); |
| 115 | struct ltt_kernel_channel *get_kernel_channel_by_name( |
| 116 | char *name, struct ltt_kernel_session *session); |
| 117 | |
| 118 | /* |
| 119 | * Create functions malloc() the data structure. |
| 120 | */ |
| 121 | struct ltt_kernel_session *trace_create_kernel_session(void); |
| 122 | struct ltt_kernel_channel *trace_create_kernel_channel(struct lttng_channel *chan, char *path); |
| 123 | struct ltt_kernel_event *trace_create_kernel_event(struct lttng_event *ev); |
| 124 | struct ltt_kernel_metadata *trace_create_kernel_metadata(char *path); |
| 125 | struct ltt_kernel_stream *trace_create_kernel_stream(void); |
| 126 | |
| 127 | /* |
| 128 | * Destroy functions free() the data structure and remove from linked list if |
| 129 | * it's applies. |
| 130 | */ |
| 131 | void trace_destroy_kernel_session(struct ltt_kernel_session *session); |
| 132 | void trace_destroy_kernel_metadata(struct ltt_kernel_metadata *metadata); |
| 133 | void trace_destroy_kernel_channel(struct ltt_kernel_channel *channel); |
| 134 | void trace_destroy_kernel_event(struct ltt_kernel_event *event); |
| 135 | void trace_destroy_kernel_stream(struct ltt_kernel_stream *stream); |
| 136 | |
| 137 | #endif /* _LTT_TRACE_H */ |