From: Jérémie Galarneau Date: Fri, 17 Aug 2018 17:25:44 +0000 (-0400) Subject: Add session rotation ongoing/completed conditions X-Git-Tag: v2.11.0-rc1~128 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=c19092cd4d6af49c38322fc55ca91f17f03f32ac;p=lttng-tools.git Add session rotation ongoing/completed conditions Signed-off-by: Jérémie Galarneau --- diff --git a/include/Makefile.am b/include/Makefile.am index 2c0019870..2da03f493 100644 --- a/include/Makefile.am +++ b/include/Makefile.am @@ -92,6 +92,7 @@ lttngconditioninclude_HEADERS= \ lttng/condition/condition.h \ lttng/condition/buffer-usage.h \ lttng/condition/session-consumed-size.h \ + lttng/condition/session-rotation.h \ lttng/condition/evaluation.h lttngnotificationinclude_HEADERS= \ @@ -112,6 +113,7 @@ noinst_HEADERS = \ lttng/condition/buffer-usage-internal.h \ lttng/condition/session-consumed-size-internal.h \ lttng/condition/evaluation-internal.h \ + lttng/condition/session-rotation-internal.h \ lttng/notification/notification-internal.h \ lttng/trigger/trigger-internal.h \ lttng/endpoint-internal.h \ diff --git a/include/lttng/condition/condition.h b/include/lttng/condition/condition.h index f179856e2..3cecfc1dd 100644 --- a/include/lttng/condition/condition.h +++ b/include/lttng/condition/condition.h @@ -26,9 +26,11 @@ struct lttng_condition; enum lttng_condition_type { LTTNG_CONDITION_TYPE_UNKNOWN = -1, - LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW = 102, - LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH = 101, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE = 100, + LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH = 101, + LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW = 102, + LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING = 103, + LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED = 104, }; enum lttng_condition_status { diff --git a/include/lttng/condition/evaluation-internal.h b/include/lttng/condition/evaluation-internal.h index 95119b37e..b88a0f712 100644 --- a/include/lttng/condition/evaluation-internal.h +++ b/include/lttng/condition/evaluation-internal.h @@ -41,6 +41,10 @@ struct lttng_evaluation { evaluation_destroy_cb destroy; }; +LTTNG_HIDDEN +void lttng_evaluation_init(struct lttng_evaluation *evaluation, + enum lttng_condition_type type); + LTTNG_HIDDEN ssize_t lttng_evaluation_create_from_buffer(const struct lttng_buffer_view *view, struct lttng_evaluation **evaluation); diff --git a/include/lttng/condition/session-rotation-internal.h b/include/lttng/condition/session-rotation-internal.h new file mode 100644 index 000000000..0afac8dd0 --- /dev/null +++ b/include/lttng/condition/session-rotation-internal.h @@ -0,0 +1,79 @@ +/* + * Copyright (C) 2017 - Jérémie Galarneau + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License, version 2.1 only, + * as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License + * for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LTTNG_CONDITION_SESSION_ROTATION_INTERNAL_H +#define LTTNG_CONDITION_SESSION_ROTATION_INTERNAL_H + +#include +#include +#include +#include "common/buffer-view.h" +#include + +struct lttng_condition_session_rotation { + struct lttng_condition parent; + char *session_name; +}; + +struct lttng_condition_session_rotation_comm { + /* Length includes the trailing \0. */ + uint32_t session_name_len; + char session_name[]; +} LTTNG_PACKED; + +struct lttng_evaluation_session_rotation { + struct lttng_evaluation parent; + uint64_t id; + struct lttng_trace_archive_location *location; +}; + +struct lttng_evaluation_session_rotation_comm { + uint64_t id; + uint8_t has_location; +} LTTNG_PACKED; + +LTTNG_HIDDEN +ssize_t lttng_condition_session_rotation_ongoing_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **condition); + +LTTNG_HIDDEN +ssize_t lttng_condition_session_rotation_completed_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **condition); + +LTTNG_HIDDEN +struct lttng_evaluation *lttng_evaluation_session_rotation_ongoing_create( + uint64_t id); + +/* Ownership of location is transferred to the evaluation. */ +LTTNG_HIDDEN +struct lttng_evaluation *lttng_evaluation_session_rotation_completed_create( + uint64_t id, + struct lttng_trace_archive_location *location); + +LTTNG_HIDDEN +ssize_t lttng_evaluation_session_rotation_ongoing_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_evaluation **evaluation); + +LTTNG_HIDDEN +ssize_t lttng_evaluation_session_rotation_completed_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_evaluation **evaluation); + +#endif /* LTTNG_CONDITION_SESSION_ROTATION_INTERNAL_H */ diff --git a/include/lttng/condition/session-rotation.h b/include/lttng/condition/session-rotation.h new file mode 100644 index 000000000..5ed71fa4d --- /dev/null +++ b/include/lttng/condition/session-rotation.h @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2017 - Jérémie Galarneau + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License, version 2.1 only, + * as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License + * for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef LTTNG_CONDITION_SESSION_ROTATION_H +#define LTTNG_CONDITION_SESSION_ROTATION_H + +#include +#include +#include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * Session rotation conditions allow an action to be taken whenever a + * session rotation is ongoing or completed. + * + * Session rotation conditions have the following properties: + * - the exact name of the session to be monitored for rotations + * + * Wildcards, regular expressions or other globbing mechanisms are not supported + * in session rotation condition properties. + */ + +/* + * Create a newly allocated session rotation in progress condition. + * + * A session rotation ongoing condition evaluates to true whenever a rotation + * is ongoing for a given session. + * + * Returns a new condition on success, NULL on failure. This condition must be + * destroyed using lttng_condition_destroy(). + */ +extern struct lttng_condition * +lttng_condition_session_rotation_ongoing_create(void); + +/* + * Create a newly allocated session rotation completion condition. + * + * A session rotation completed condition evaluates to true whenever a rotation + * is completed for a given session. This condition is not evaluated on + * subscription or registration of a trigger. This means that a trigger + * using this condition will only fire when the next session rotation completes. + * Previously completed rotations will have no effect. + * + * Returns a new condition on success, NULL on failure. This condition must be + * destroyed using lttng_condition_destroy(). + */ + extern struct lttng_condition * + lttng_condition_session_rotation_completed_create(void); + +/* + * Get the session name property of a session rotation condition. + * + * The caller does not assume the ownership of the returned session name. The + * session name shall only only be used for the duration of the condition's + * lifetime, or before a different session name is set. + * + * Returns LTTNG_CONDITION_STATUS_OK and a pointer to the condition's session + * name on success, LTTNG_CONDITION_STATUS_INVALID if an invalid + * parameter is passed, or LTTNG_CONDITION_STATUS_UNSET if a session name + * was not set prior to this call. + */ +extern enum lttng_condition_status +lttng_condition_session_rotation_get_session_name( + const struct lttng_condition *condition, + const char **session_name); + +/* + * Set the session name property of a session rotation condition. + * + * The passed session name parameter will be copied to the condition. + * + * Returns LTTNG_CONDITION_STATUS_OK on success, LTTNG_CONDITION_STATUS_INVALID + * if invalid paramenters are passed. + */ +extern enum lttng_condition_status +lttng_condition_session_rotation_set_session_name( + struct lttng_condition *condition, + const char *session_name); + +/** + * lttng_evaluation_session_rotation are specialised lttng_evaluations + * which allow users to query a number of properties resulting from the + * evaluation of a condition which evaluated to true. + */ + +/* + * Get the session rotation id property of a session rotation evaluation. + * + * Returns LTTNG_EVALUATION_STATUS_OK on success and the id of the session + * rotation, or LTTNG_EVALUATION_STATUS_INVALID if an invalid parameter is + * passed. + */ +extern enum lttng_evaluation_status +lttng_evaluation_session_rotation_get_id( + const struct lttng_evaluation *evaluation, uint64_t *id); + +/* + * Get the session rotation location property of a session rotation completed + * evaluation. + * + * The caller does not assume the ownership of the returned location. The + * location shall only only be used for the duration of the evaluation's + * lifetime. + * + * Returns LTTNG_EVALUATION_STATUS_OK and set location on success. + * A NULL location may be returned if a rotation chunk's location + * has expired. + * + * LTTNG_EVALUATION_STATUS_INVALID is returned if an invalid parameter is + * passed. + */ +extern enum lttng_evaluation_status +lttng_evaluation_session_rotation_completed_get_location( + const struct lttng_evaluation *evaluation, + const struct lttng_trace_archive_location **location); + +#ifdef __cplusplus +} +#endif + +#endif /* LTTNG_CONDITION_SESSION_ROTATION_H */ diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h index d13f9639f..5c17fe37e 100644 --- a/include/lttng/lttng.h +++ b/include/lttng/lttng.h @@ -40,6 +40,7 @@ #include #include #include +#include #include #include #include diff --git a/src/common/Makefile.am b/src/common/Makefile.am index c6b42e4dd..f39aeaa5f 100644 --- a/src/common/Makefile.am +++ b/src/common/Makefile.am @@ -73,6 +73,7 @@ libcommon_la_SOURCES = error.h error.c utils.c utils.h runas.c runas.h \ filter.c filter.h context.c context.h \ action.c notify.c condition.c buffer-usage.c \ session-consumed-size.c \ + session-rotation.c \ evaluation.c notification.c trigger.c endpoint.c \ dynamic-buffer.h dynamic-buffer.c \ buffer-view.h buffer-view.c \ diff --git a/src/common/condition.c b/src/common/condition.c index 6cebeb03f..c777fb9c5 100644 --- a/src/common/condition.c +++ b/src/common/condition.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -142,6 +143,12 @@ ssize_t lttng_condition_create_from_buffer( case LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE: create_from_buffer = lttng_condition_session_consumed_size_create_from_buffer; break; + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: + create_from_buffer = lttng_condition_session_rotation_ongoing_create_from_buffer; + break; + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: + create_from_buffer = lttng_condition_session_rotation_completed_create_from_buffer; + break; default: ERR("Attempted to create condition of unknown type (%i)", (int) condition_comm->condition_type); diff --git a/src/common/evaluation.c b/src/common/evaluation.c index f07c81b18..91d5c0b1d 100644 --- a/src/common/evaluation.c +++ b/src/common/evaluation.c @@ -18,11 +18,19 @@ #include #include #include +#include #include #include #include #include +LTTNG_HIDDEN +void lttng_evaluation_init(struct lttng_evaluation *evaluation, + enum lttng_condition_type type) +{ + evaluation->type = type; +} + LTTNG_HIDDEN int lttng_evaluation_serialize(struct lttng_evaluation *evaluation, struct lttng_dynamic_buffer *buf) @@ -92,6 +100,22 @@ ssize_t lttng_evaluation_create_from_buffer( } evaluation_size += ret; break; + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: + ret = lttng_evaluation_session_rotation_ongoing_create_from_buffer( + &evaluation_view, evaluation); + if (ret < 0) { + goto end; + } + evaluation_size += ret; + break; + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: + ret = lttng_evaluation_session_rotation_completed_create_from_buffer( + &evaluation_view, evaluation); + if (ret < 0) { + goto end; + } + evaluation_size += ret; + break; default: ERR("Attempted to create evaluation of unknown type (%i)", (int) evaluation_comm->type); diff --git a/src/common/session-rotation.c b/src/common/session-rotation.c new file mode 100644 index 000000000..be48a998a --- /dev/null +++ b/src/common/session-rotation.c @@ -0,0 +1,591 @@ +/* + * Copyright (C) 2017 - Jérémie Galarneau + * + * This library is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License, version 2.1 only, + * as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License + * for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include + +static +bool lttng_condition_session_rotation_validate( + const struct lttng_condition *condition); +static +int lttng_condition_session_rotation_serialize( + const struct lttng_condition *condition, + struct lttng_dynamic_buffer *buf); +static +bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a, + const struct lttng_condition *_b); +static +void lttng_condition_session_rotation_destroy( + struct lttng_condition *condition); + +static const +struct lttng_condition rotation_condition_template = { + /* .type omitted; shall be set on creation. */ + .validate = lttng_condition_session_rotation_validate, + .serialize = lttng_condition_session_rotation_serialize, + .equal = lttng_condition_session_rotation_is_equal, + .destroy = lttng_condition_session_rotation_destroy, +}; + +static +int lttng_evaluation_session_rotation_serialize( + const struct lttng_evaluation *evaluation, + struct lttng_dynamic_buffer *buf); +static +void lttng_evaluation_session_rotation_destroy( + struct lttng_evaluation *evaluation); + +static const +struct lttng_evaluation rotation_evaluation_template = { + /* .type omitted; shall be set on creation. */ + .serialize = lttng_evaluation_session_rotation_serialize, + .destroy = lttng_evaluation_session_rotation_destroy, +}; + +static +bool is_rotation_condition(const struct lttng_condition *condition) +{ + enum lttng_condition_type type = lttng_condition_get_type(condition); + + return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING || + type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED; +} + +static +bool is_rotation_evaluation(const struct lttng_evaluation *evaluation) +{ + enum lttng_condition_type type = lttng_evaluation_get_type(evaluation); + + return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING || + type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED; +} + +static +bool lttng_condition_session_rotation_validate( + const struct lttng_condition *condition) +{ + bool valid = false; + struct lttng_condition_session_rotation *rotation; + + if (!condition) { + goto end; + } + + rotation = container_of(condition, + struct lttng_condition_session_rotation, parent); + if (!rotation->session_name) { + ERR("Invalid session rotation condition: a target session name must be set."); + goto end; + } + + valid = true; +end: + return valid; +} + +static +int lttng_condition_session_rotation_serialize( + const struct lttng_condition *condition, + struct lttng_dynamic_buffer *buf) +{ + int ret; + size_t session_name_len; + struct lttng_condition_session_rotation *rotation; + struct lttng_condition_session_rotation_comm rotation_comm; + + if (!condition || !is_rotation_condition(condition)) { + ret = -1; + goto end; + } + + DBG("Serializing session rotation condition"); + rotation = container_of(condition, struct lttng_condition_session_rotation, + parent); + + session_name_len = strlen(rotation->session_name) + 1; + if (session_name_len > LTTNG_NAME_MAX) { + ret = -1; + goto end; + } + + rotation_comm.session_name_len = session_name_len; + ret = lttng_dynamic_buffer_append(buf, &rotation_comm, + sizeof(rotation_comm)); + if (ret) { + goto end; + } + ret = lttng_dynamic_buffer_append(buf, rotation->session_name, + session_name_len); + if (ret) { + goto end; + } +end: + return ret; +} + +static +bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a, + const struct lttng_condition *_b) +{ + bool is_equal = false; + struct lttng_condition_session_rotation *a, *b; + + a = container_of(_a, struct lttng_condition_session_rotation, parent); + b = container_of(_b, struct lttng_condition_session_rotation, parent); + + /* Both session names must be set or both must be unset. */ + if ((a->session_name && !b->session_name) || + (!a->session_name && b->session_name)) { + WARN("Comparing session rotation conditions with uninitialized session names."); + goto end; + } + + if (a->session_name && b->session_name && + strcmp(a->session_name, b->session_name)) { + goto end; + } + + is_equal = true; +end: + return is_equal; +} + +static +void lttng_condition_session_rotation_destroy( + struct lttng_condition *condition) +{ + struct lttng_condition_session_rotation *rotation; + + rotation = container_of(condition, + struct lttng_condition_session_rotation, parent); + + free(rotation->session_name); + free(rotation); +} + +static +struct lttng_condition *lttng_condition_session_rotation_create( + enum lttng_condition_type type) +{ + struct lttng_condition_session_rotation *condition; + + condition = zmalloc(sizeof(struct lttng_condition_session_rotation)); + if (!condition) { + return NULL; + } + + memcpy(&condition->parent, &rotation_condition_template, + sizeof(*condition)); + lttng_condition_init(&condition->parent, type); + return &condition->parent; +} + +struct lttng_condition *lttng_condition_session_rotation_ongoing_create(void) +{ + return lttng_condition_session_rotation_create( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING); +} + +struct lttng_condition *lttng_condition_session_rotation_completed_create(void) +{ + return lttng_condition_session_rotation_create( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED); +} + +static +ssize_t init_condition_from_buffer(struct lttng_condition *condition, + const struct lttng_buffer_view *src_view) +{ + ssize_t ret, condition_size; + enum lttng_condition_status status; + const struct lttng_condition_session_rotation_comm *condition_comm; + const char *session_name; + struct lttng_buffer_view name_view; + + if (src_view->size < sizeof(*condition_comm)) { + ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header"); + ret = -1; + goto end; + } + + condition_comm = (const struct lttng_condition_session_rotation_comm *) src_view->data; + name_view = lttng_buffer_view_from_view(src_view, + sizeof(*condition_comm), -1); + + if (condition_comm->session_name_len > LTTNG_NAME_MAX) { + ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME"); + ret = -1; + goto end; + } + + if (name_view.size < condition_comm->session_name_len) { + ERR("Failed to initialize from malformed condition buffer: buffer too short to contain session name"); + ret = -1; + goto end; + } + + session_name = name_view.data; + if (*(session_name + condition_comm->session_name_len - 1) != '\0') { + ERR("Malformed session name encountered in condition buffer"); + ret = -1; + goto end; + } + + status = lttng_condition_session_rotation_set_session_name(condition, + session_name); + if (status != LTTNG_CONDITION_STATUS_OK) { + ERR("Failed to set buffer consumed session name"); + ret = -1; + goto end; + } + + if (!lttng_condition_validate(condition)) { + ret = -1; + goto end; + } + + condition_size = sizeof(*condition_comm) + + (ssize_t) condition_comm->session_name_len; + ret = condition_size; +end: + return ret; +} + +static +ssize_t lttng_condition_session_rotation_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **_condition, + enum lttng_condition_type type) +{ + ssize_t ret; + struct lttng_condition *condition = NULL; + + switch (type) { + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING: + condition = lttng_condition_session_rotation_ongoing_create(); + break; + case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED: + condition = lttng_condition_session_rotation_completed_create(); + break; + default: + ret = -1; + goto error; + } + + if (!_condition || !condition) { + ret = -1; + goto error; + } + + ret = init_condition_from_buffer(condition, view); + if (ret < 0) { + goto error; + } + + *_condition = condition; + return ret; +error: + lttng_condition_destroy(condition); + return ret; +} + +LTTNG_HIDDEN +ssize_t lttng_condition_session_rotation_ongoing_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **condition) +{ + return lttng_condition_session_rotation_create_from_buffer(view, + condition, + LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING); +} + +LTTNG_HIDDEN +ssize_t lttng_condition_session_rotation_completed_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **condition) +{ + return lttng_condition_session_rotation_create_from_buffer(view, + condition, + LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED); +} + +static +struct lttng_evaluation *lttng_evaluation_session_rotation_create( + enum lttng_condition_type type, uint64_t id, + struct lttng_trace_archive_location *location) +{ + struct lttng_evaluation_session_rotation *evaluation; + + evaluation = zmalloc(sizeof(struct lttng_evaluation_session_rotation)); + if (!evaluation) { + return NULL; + } + + memcpy(&evaluation->parent, &rotation_evaluation_template, + sizeof(*evaluation)); + lttng_evaluation_init(&evaluation->parent, type); + evaluation->id = id; + evaluation->location = location; + return &evaluation->parent; +} + +static +ssize_t create_evaluation_from_buffer( + enum lttng_condition_type type, + const struct lttng_buffer_view *view, + struct lttng_evaluation **_evaluation) +{ + ssize_t ret, size; + struct lttng_evaluation *evaluation = NULL; + struct lttng_trace_archive_location *location = NULL; + const struct lttng_evaluation_session_rotation_comm *comm = + (const struct lttng_evaluation_session_rotation_comm *) view->data; + struct lttng_buffer_view location_view; + + if (view->size < sizeof(*comm)) { + goto error; + } + + size = sizeof(*comm); + if (comm->has_location) { + location_view = lttng_buffer_view_from_view(view, sizeof(*comm), + -1); + if (!location_view.data) { + goto error; + } + + ret = lttng_trace_archive_location_create_from_buffer( + &location_view, &location); + if (ret < 0) { + goto error; + } + size += ret; + } + + evaluation = lttng_evaluation_session_rotation_create(type, comm->id, + location); + if (!evaluation) { + goto error; + } + + ret = size; + *_evaluation = evaluation; + return ret; +error: + lttng_trace_archive_location_destroy(location); + evaluation = NULL; + return -1; +} + +static +ssize_t lttng_evaluation_session_rotation_create_from_buffer( + enum lttng_condition_type type, + const struct lttng_buffer_view *view, + struct lttng_evaluation **_evaluation) +{ + ssize_t ret; + struct lttng_evaluation *evaluation = NULL; + + if (!_evaluation) { + ret = -1; + goto error; + } + + ret = create_evaluation_from_buffer(type, view, &evaluation); + if (ret < 0) { + goto error; + } + + *_evaluation = evaluation; + return ret; +error: + lttng_evaluation_destroy(evaluation); + return ret; +} + +LTTNG_HIDDEN +ssize_t lttng_evaluation_session_rotation_ongoing_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_evaluation **evaluation) +{ + return lttng_evaluation_session_rotation_create_from_buffer( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING, + view, evaluation); +} + +LTTNG_HIDDEN +ssize_t lttng_evaluation_session_rotation_completed_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_evaluation **evaluation) +{ + return lttng_evaluation_session_rotation_create_from_buffer( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED, + view, evaluation); +} + +LTTNG_HIDDEN +struct lttng_evaluation *lttng_evaluation_session_rotation_ongoing_create( + uint64_t id) +{ + return lttng_evaluation_session_rotation_create( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING, id, + NULL); +} + +LTTNG_HIDDEN +struct lttng_evaluation *lttng_evaluation_session_rotation_completed_create( + uint64_t id, struct lttng_trace_archive_location *location) +{ + return lttng_evaluation_session_rotation_create( + LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED, id, + location); +} + +enum lttng_condition_status +lttng_condition_session_rotation_get_session_name( + const struct lttng_condition *condition, + const char **session_name) +{ + struct lttng_condition_session_rotation *rotation; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !is_rotation_condition(condition) || !session_name) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + rotation = container_of(condition, struct lttng_condition_session_rotation, + parent); + if (!rotation->session_name) { + status = LTTNG_CONDITION_STATUS_UNSET; + goto end; + } + *session_name = rotation->session_name; +end: + return status; +} + +enum lttng_condition_status +lttng_condition_session_rotation_set_session_name( + struct lttng_condition *condition, const char *session_name) +{ + char *session_name_copy; + struct lttng_condition_session_rotation *rotation; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !is_rotation_condition(condition) || + !session_name || strlen(session_name) == 0) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + rotation = container_of(condition, + struct lttng_condition_session_rotation, parent); + session_name_copy = strdup(session_name); + if (!session_name_copy) { + status = LTTNG_CONDITION_STATUS_ERROR; + goto end; + } + + free(rotation->session_name); + rotation->session_name = session_name_copy; +end: + return status; +} + +static +int lttng_evaluation_session_rotation_serialize( + const struct lttng_evaluation *evaluation, + struct lttng_dynamic_buffer *buf) +{ + int ret; + struct lttng_evaluation_session_rotation *rotation; + struct lttng_evaluation_session_rotation_comm comm = { 0 }; + + rotation = container_of(evaluation, + struct lttng_evaluation_session_rotation, parent); + comm.id = rotation->id; + comm.has_location = !!rotation->location; + ret = lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); + if (ret) { + goto end; + } + if (!rotation->location) { + goto end; + } + ret = lttng_trace_archive_location_serialize(rotation->location, + buf); +end: + return ret; +} + +static +void lttng_evaluation_session_rotation_destroy( + struct lttng_evaluation *evaluation) +{ + struct lttng_evaluation_session_rotation *rotation; + + rotation = container_of(evaluation, + struct lttng_evaluation_session_rotation, parent); + lttng_trace_archive_location_destroy(rotation->location); + free(rotation); +} + +enum lttng_evaluation_status +lttng_evaluation_session_rotation_get_id( + const struct lttng_evaluation *evaluation, uint64_t *id) +{ + const struct lttng_evaluation_session_rotation *rotation; + enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; + + if (!evaluation || !id || !is_rotation_evaluation(evaluation)) { + status = LTTNG_EVALUATION_STATUS_INVALID; + goto end; + } + + rotation = container_of(evaluation, + struct lttng_evaluation_session_rotation, parent); + *id = rotation->id; +end: + return status; +} + +enum lttng_evaluation_status +lttng_evaluation_session_rotation_completed_get_location( + const struct lttng_evaluation *evaluation, + const struct lttng_trace_archive_location **location) +{ + const struct lttng_evaluation_session_rotation *rotation; + enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; + + if (!evaluation || !location || + evaluation->type != LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED) { + status = LTTNG_EVALUATION_STATUS_INVALID; + goto end; + } + + rotation = container_of(evaluation, + struct lttng_evaluation_session_rotation, parent); + *location = rotation->location; +end: + return status; +}