| 1 | /* |
| 2 | * Copyright (C) 2011 EfficiOS Inc. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-only |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #ifndef _LTT_KERNEL_CTL_H |
| 9 | #define _LTT_KERNEL_CTL_H |
| 10 | |
| 11 | #include "lttng/lttng-error.h" |
| 12 | #include "lttng/tracker.h" |
| 13 | #include "session.h" |
| 14 | #include "snapshot.h" |
| 15 | #include "trace-kernel.h" |
| 16 | |
| 17 | /* |
| 18 | * Default size for the event list when kernel_list_events is called. This size |
| 19 | * value is based on the initial LTTng 2.0 version set of tracepoints. |
| 20 | * |
| 21 | * This is NOT an upper bound because if the real event list size is bigger, |
| 22 | * dynamic reallocation is performed. |
| 23 | */ |
| 24 | #define KERNEL_EVENT_INIT_LIST_SIZE 64 |
| 25 | |
| 26 | int kernel_add_channel_context(struct ltt_kernel_channel *chan, |
| 27 | struct ltt_kernel_context *ctx); |
| 28 | int kernel_create_session(struct ltt_session *session); |
| 29 | int kernel_create_channel(struct ltt_kernel_session *session, |
| 30 | struct lttng_channel *chan); |
| 31 | int kernel_create_event(struct lttng_event *ev, struct ltt_kernel_channel *channel, |
| 32 | char *filter_expression, struct lttng_bytecode *filter); |
| 33 | int kernel_disable_channel(struct ltt_kernel_channel *chan); |
| 34 | int kernel_disable_event(struct ltt_kernel_event *event); |
| 35 | int kernel_enable_event(struct ltt_kernel_event *event); |
| 36 | int kernel_enable_channel(struct ltt_kernel_channel *chan); |
| 37 | enum lttng_error_code kernel_process_attr_tracker_set_tracking_policy( |
| 38 | struct ltt_kernel_session *session, |
| 39 | enum lttng_process_attr process_attr, |
| 40 | enum lttng_tracking_policy policy); |
| 41 | enum lttng_error_code kernel_process_attr_tracker_inclusion_set_add_value( |
| 42 | struct ltt_kernel_session *session, |
| 43 | enum lttng_process_attr process_attr, |
| 44 | const struct process_attr_value *value); |
| 45 | enum lttng_error_code kernel_process_attr_tracker_inclusion_set_remove_value( |
| 46 | struct ltt_kernel_session *session, |
| 47 | enum lttng_process_attr process_attr, |
| 48 | const struct process_attr_value *value); |
| 49 | const struct process_attr_tracker *kernel_get_process_attr_tracker( |
| 50 | struct ltt_kernel_session *session, |
| 51 | enum lttng_process_attr process_attr); |
| 52 | int kernel_open_metadata(struct ltt_kernel_session *session); |
| 53 | int kernel_open_metadata_stream(struct ltt_kernel_session *session); |
| 54 | int kernel_open_channel_stream(struct ltt_kernel_channel *channel); |
| 55 | int kernel_flush_buffer(struct ltt_kernel_channel *channel); |
| 56 | int kernel_metadata_flush_buffer(int fd); |
| 57 | int kernel_start_session(struct ltt_kernel_session *session); |
| 58 | int kernel_stop_session(struct ltt_kernel_session *session); |
| 59 | ssize_t kernel_list_events(struct lttng_event **event_list); |
| 60 | void kernel_wait_quiescent(void); |
| 61 | int kernel_validate_version(struct lttng_kernel_abi_tracer_version *kernel_tracer_version, |
| 62 | struct lttng_kernel_abi_tracer_abi_version *kernel_tracer_abi_version); |
| 63 | void kernel_destroy_session(struct ltt_kernel_session *ksess); |
| 64 | void kernel_free_session(struct ltt_kernel_session *ksess); |
| 65 | void kernel_destroy_channel(struct ltt_kernel_channel *kchan); |
| 66 | enum lttng_error_code kernel_snapshot_record( |
| 67 | struct ltt_kernel_session *ksess, |
| 68 | const struct consumer_output *output, int wait, |
| 69 | uint64_t nb_packets_per_stream); |
| 70 | int kernel_syscall_mask(int chan_fd, char **syscall_mask, uint32_t *nr_bits); |
| 71 | enum lttng_error_code kernel_rotate_session(struct ltt_session *session); |
| 72 | enum lttng_error_code kernel_clear_session(struct ltt_session *session); |
| 73 | |
| 74 | int init_kernel_workarounds(void); |
| 75 | int kernel_supports_ring_buffer_snapshot_sample_positions(void); |
| 76 | int kernel_supports_ring_buffer_packet_sequence_number(void); |
| 77 | int kernel_supports_event_notifiers(void); |
| 78 | int init_kernel_tracer(void); |
| 79 | void cleanup_kernel_tracer(void); |
| 80 | bool kernel_tracer_is_initialized(void); |
| 81 | |
| 82 | enum lttng_error_code kernel_create_channel_subdirectories( |
| 83 | const struct ltt_kernel_session *ksess); |
| 84 | |
| 85 | enum lttng_error_code kernel_create_event_notifier_group_notification_fd( |
| 86 | int *event_notifier_group_notification_fd); |
| 87 | enum lttng_error_code kernel_destroy_event_notifier_group_notification_fd( |
| 88 | int event_notifier_group_notification_fd); |
| 89 | |
| 90 | enum lttng_error_code kernel_register_event_notifier( |
| 91 | struct lttng_trigger *trigger, |
| 92 | const struct lttng_credentials *cmd_creds); |
| 93 | enum lttng_error_code kernel_unregister_event_notifier( |
| 94 | const struct lttng_trigger *trigger); |
| 95 | |
| 96 | int kernel_get_notification_fd(void); |
| 97 | |
| 98 | #endif /* _LTT_KERNEL_CTL_H */ |