| 1 | /* |
| 2 | * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com> |
| 3 | * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: GPL-2.0-only |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #define _LGPL_SOURCE |
| 10 | #include <lttng/trigger/trigger.h> |
| 11 | #include <common/error.h> |
| 12 | #include <common/config/session-config.h> |
| 13 | #include <common/defaults.h> |
| 14 | #include <common/utils.h> |
| 15 | #include <common/futex.h> |
| 16 | #include <common/align.h> |
| 17 | #include <common/time.h> |
| 18 | #include <common/hashtable/utils.h> |
| 19 | #include <common/kernel-ctl/kernel-ctl.h> |
| 20 | #include <common/credentials.h> |
| 21 | #include <sys/eventfd.h> |
| 22 | #include <sys/stat.h> |
| 23 | #include <time.h> |
| 24 | #include <signal.h> |
| 25 | #include <inttypes.h> |
| 26 | |
| 27 | #include <lttng/notification/channel-internal.h> |
| 28 | #include <lttng/rotate-internal.h> |
| 29 | |
| 30 | #include "session.h" |
| 31 | #include "rotate.h" |
| 32 | #include "rotation-thread.h" |
| 33 | #include "lttng-sessiond.h" |
| 34 | #include "health-sessiond.h" |
| 35 | #include "cmd.h" |
| 36 | #include "utils.h" |
| 37 | #include "notification-thread-commands.h" |
| 38 | |
| 39 | #include <urcu.h> |
| 40 | #include <urcu/list.h> |
| 41 | #include <urcu/rculfhash.h> |
| 42 | |
| 43 | int subscribe_session_consumed_size_rotation(struct ltt_session *session, uint64_t size, |
| 44 | struct notification_thread_handle *notification_thread_handle) |
| 45 | { |
| 46 | int ret; |
| 47 | enum lttng_condition_status condition_status; |
| 48 | enum lttng_notification_channel_status nc_status; |
| 49 | struct lttng_action *action; |
| 50 | const struct lttng_credentials session_creds = { |
| 51 | .uid = session->uid, |
| 52 | .gid = session->gid, |
| 53 | }; |
| 54 | |
| 55 | session->rotate_condition = lttng_condition_session_consumed_size_create(); |
| 56 | if (!session->rotate_condition) { |
| 57 | ERR("Failed to create session consumed size condition object"); |
| 58 | ret = -1; |
| 59 | goto end; |
| 60 | } |
| 61 | |
| 62 | condition_status = lttng_condition_session_consumed_size_set_threshold( |
| 63 | session->rotate_condition, size); |
| 64 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 65 | ERR("Could not set session consumed size condition threshold (size = %" PRIu64 ")", |
| 66 | size); |
| 67 | ret = -1; |
| 68 | goto end; |
| 69 | } |
| 70 | |
| 71 | condition_status = |
| 72 | lttng_condition_session_consumed_size_set_session_name( |
| 73 | session->rotate_condition, session->name); |
| 74 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { |
| 75 | ERR("Could not set session consumed size condition session name (name = %s)", |
| 76 | session->name); |
| 77 | ret = -1; |
| 78 | goto end; |
| 79 | } |
| 80 | |
| 81 | action = lttng_action_notify_create(); |
| 82 | if (!action) { |
| 83 | ERR("Could not create notify action"); |
| 84 | ret = -1; |
| 85 | goto end; |
| 86 | } |
| 87 | |
| 88 | session->rotate_trigger = lttng_trigger_create(session->rotate_condition, |
| 89 | action); |
| 90 | if (!session->rotate_trigger) { |
| 91 | ERR("Could not create size-based rotation trigger"); |
| 92 | ret = -1; |
| 93 | goto end; |
| 94 | } |
| 95 | |
| 96 | lttng_trigger_set_credentials( |
| 97 | session->rotate_trigger, &session_creds); |
| 98 | |
| 99 | nc_status = lttng_notification_channel_subscribe( |
| 100 | rotate_notification_channel, session->rotate_condition); |
| 101 | if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { |
| 102 | ERR("Could not subscribe to session consumed size notification"); |
| 103 | ret = -1; |
| 104 | goto end; |
| 105 | } |
| 106 | |
| 107 | ret = notification_thread_command_register_trigger( |
| 108 | notification_thread_handle, session->rotate_trigger); |
| 109 | if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) { |
| 110 | ERR("Register trigger, %s", lttng_strerror(ret)); |
| 111 | ret = -1; |
| 112 | goto end; |
| 113 | } |
| 114 | |
| 115 | ret = 0; |
| 116 | |
| 117 | end: |
| 118 | return ret; |
| 119 | } |
| 120 | |
| 121 | int unsubscribe_session_consumed_size_rotation(struct ltt_session *session, |
| 122 | struct notification_thread_handle *notification_thread_handle) |
| 123 | { |
| 124 | int ret = 0; |
| 125 | enum lttng_notification_channel_status status; |
| 126 | |
| 127 | status = lttng_notification_channel_unsubscribe( |
| 128 | rotate_notification_channel, |
| 129 | session->rotate_condition); |
| 130 | if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { |
| 131 | ERR("Session unsubscribe error: %d", (int) status); |
| 132 | ret = -1; |
| 133 | goto end; |
| 134 | } |
| 135 | |
| 136 | ret = notification_thread_command_unregister_trigger( |
| 137 | notification_thread_handle, session->rotate_trigger); |
| 138 | if (ret != LTTNG_OK) { |
| 139 | ERR("Session unregister trigger error: %d", ret); |
| 140 | goto end; |
| 141 | } |
| 142 | |
| 143 | ret = 0; |
| 144 | end: |
| 145 | return ret; |
| 146 | } |