[lttng-tools.git] / src / common / session-rotation.c

/*
 * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 */

#include <lttng/condition/condition-internal.h>
#include <lttng/condition/session-rotation-internal.h>
#include <lttng/location-internal.h>
#include <common/macros.h>
#include <common/error.h>
#include <assert.h>
#include <stdbool.h>

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_payload *payload);
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_payload *payload);
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_payload *payload)
{
	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(&payload->buffer, &rotation_comm,
			sizeof(rotation_comm));
	if (ret) {
		goto end;
	}
	ret = lttng_dynamic_buffer_append(&payload->buffer,
			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->parent));
	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_payload(struct lttng_condition *condition,
		struct lttng_payload_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->buffer.size < sizeof(*condition_comm)) {
		ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header");
		ret = -1;
		goto end;
	}

	condition_comm = (typeof(condition_comm)) src_view->buffer.data;
	name_view = lttng_buffer_view_from_view(&src_view->buffer,
			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_payload(
		struct lttng_payload_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_payload(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_payload(
		struct lttng_payload_view *view,
		struct lttng_condition **condition)
{
	return lttng_condition_session_rotation_create_from_payload(view,
			condition,
			LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING);
}

LTTNG_HIDDEN
ssize_t lttng_condition_session_rotation_completed_create_from_payload(
		struct lttng_payload_view *view,
		struct lttng_condition **condition)
{
	return lttng_condition_session_rotation_create_from_payload(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->parent));
	lttng_evaluation_init(&evaluation->parent, type);
	evaluation->id = id;
	evaluation->location = location;
	return &evaluation->parent;
}

static
ssize_t create_evaluation_from_payload(
		enum lttng_condition_type type,
		struct lttng_payload_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 =
			(typeof(comm)) view->buffer.data;
	struct lttng_buffer_view location_view;

	if (view->buffer.size < sizeof(*comm)) {
		goto error;
	}

	size = sizeof(*comm);
	if (comm->has_location) {
		location_view = lttng_buffer_view_from_view(
				&view->buffer, 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_payload(
		enum lttng_condition_type type,
		struct lttng_payload_view *view,
		struct lttng_evaluation **_evaluation)
{
	ssize_t ret;
	struct lttng_evaluation *evaluation = NULL;

	if (!_evaluation) {
		ret = -1;
		goto error;
	}

	ret = create_evaluation_from_payload(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_payload(
		struct lttng_payload_view *view,
		struct lttng_evaluation **evaluation)
{
	return lttng_evaluation_session_rotation_create_from_payload(
			LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING,
			view, evaluation);
}

LTTNG_HIDDEN
ssize_t lttng_evaluation_session_rotation_completed_create_from_payload(
		struct lttng_payload_view *view,
		struct lttng_evaluation **evaluation)
{
	return lttng_evaluation_session_rotation_create_from_payload(
			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_payload *payload)
{
	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(
			&payload->buffer, &comm, sizeof(comm));
	if (ret) {
		goto end;
	}
	if (!rotation->location) {
		goto end;
	}
	ret = lttng_trace_archive_location_serialize(rotation->location,
			&payload->buffer);
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;
}
Commit	Line	Data
c19092cd	1	/*
ab5be9fa	2	* Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com>
c19092cd	3	*
ab5be9fa	4	* SPDX-License-Identifier: LGPL-2.1-only
c19092cd	5	*
c19092cd JG	6	*/
	7
	8	#include <lttng/condition/condition-internal.h>
	9	#include <lttng/condition/session-rotation-internal.h>
	10	#include <lttng/location-internal.h>
	11	#include <common/macros.h>
	12	#include <common/error.h>
	13	#include <assert.h>
	14	#include <stdbool.h>
	15
	16	static
	17	bool lttng_condition_session_rotation_validate(
	18	const struct lttng_condition *condition);
	19	static
	20	int lttng_condition_session_rotation_serialize(
	21	const struct lttng_condition *condition,
c0a66c84	22	struct lttng_payload *payload);
c19092cd JG	23	static
	24	bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a,
	25	const struct lttng_condition *_b);
	26	static
	27	void lttng_condition_session_rotation_destroy(
	28	struct lttng_condition *condition);
	29
	30	static const
	31	struct lttng_condition rotation_condition_template = {
	32	/* .type omitted; shall be set on creation. */
	33	.validate = lttng_condition_session_rotation_validate,
	34	.serialize = lttng_condition_session_rotation_serialize,
	35	.equal = lttng_condition_session_rotation_is_equal,
	36	.destroy = lttng_condition_session_rotation_destroy,
	37	};
	38
	39	static
	40	int lttng_evaluation_session_rotation_serialize(
	41	const struct lttng_evaluation *evaluation,
c0a66c84	42	struct lttng_payload *payload);
c19092cd JG	43	static
	44	void lttng_evaluation_session_rotation_destroy(
	45	struct lttng_evaluation *evaluation);
	46
	47	static const
	48	struct lttng_evaluation rotation_evaluation_template = {
	49	/* .type omitted; shall be set on creation. */
	50	.serialize = lttng_evaluation_session_rotation_serialize,
	51	.destroy = lttng_evaluation_session_rotation_destroy,
	52	};
	53
	54	static
	55	bool is_rotation_condition(const struct lttng_condition *condition)
	56	{
	57	enum lttng_condition_type type = lttng_condition_get_type(condition);
	58
	59	return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING \|\|
	60	type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED;
	61	}
	62
	63	static
	64	bool is_rotation_evaluation(const struct lttng_evaluation *evaluation)
	65	{
	66	enum lttng_condition_type type = lttng_evaluation_get_type(evaluation);
	67
	68	return type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING \|\|
	69	type == LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED;
	70	}
	71
	72	static
	73	bool lttng_condition_session_rotation_validate(
	74	const struct lttng_condition *condition)
	75	{
	76	bool valid = false;
	77	struct lttng_condition_session_rotation *rotation;
	78
	79	if (!condition) {
	80	goto end;
	81	}
	82
	83	rotation = container_of(condition,
	84	struct lttng_condition_session_rotation, parent);
	85	if (!rotation->session_name) {
	86	ERR("Invalid session rotation condition: a target session name must be set.");
	87	goto end;
	88	}
	89
	90	valid = true;
	91	end:
	92	return valid;
	93	}
	94
	95	static
	96	int lttng_condition_session_rotation_serialize(
	97	const struct lttng_condition *condition,
c0a66c84	98	struct lttng_payload *payload)
c19092cd JG	99	{
	100	int ret;
	101	size_t session_name_len;
	102	struct lttng_condition_session_rotation *rotation;
	103	struct lttng_condition_session_rotation_comm rotation_comm;
	104
	105	if (!condition \|\| !is_rotation_condition(condition)) {
	106	ret = -1;
	107	goto end;
	108	}
	109
	110	DBG("Serializing session rotation condition");
	111	rotation = container_of(condition, struct lttng_condition_session_rotation,
	112	parent);
	113
	114	session_name_len = strlen(rotation->session_name) + 1;
	115	if (session_name_len > LTTNG_NAME_MAX) {
	116	ret = -1;
	117	goto end;
	118	}
	119
	120	rotation_comm.session_name_len = session_name_len;
c0a66c84	121	ret = lttng_dynamic_buffer_append(&payload->buffer, &rotation_comm,
c19092cd JG	122	sizeof(rotation_comm));
	123	if (ret) {
	124	goto end;
	125	}
c0a66c84 JG	126	ret = lttng_dynamic_buffer_append(&payload->buffer,
c0a66c84 JG	127	rotation->session_name, session_name_len);
c19092cd JG	128	if (ret) {
	129	goto end;
	130	}
	131	end:
	132	return ret;
	133	}
	134
	135	static
	136	bool lttng_condition_session_rotation_is_equal(const struct lttng_condition *_a,
	137	const struct lttng_condition *_b)
	138	{
	139	bool is_equal = false;
	140	struct lttng_condition_session_rotation a, b;
	141
	142	a = container_of(_a, struct lttng_condition_session_rotation, parent);
	143	b = container_of(_b, struct lttng_condition_session_rotation, parent);
	144
	145	/* Both session names must be set or both must be unset. */
	146	if ((a->session_name && !b->session_name) \|\|
	147	(!a->session_name && b->session_name)) {
	148	WARN("Comparing session rotation conditions with uninitialized session names.");
	149	goto end;
	150	}
	151
	152	if (a->session_name && b->session_name &&
	153	strcmp(a->session_name, b->session_name)) {
	154	goto end;
	155	}
	156
	157	is_equal = true;
	158	end:
	159	return is_equal;
	160	}
	161
	162	static
	163	void lttng_condition_session_rotation_destroy(
	164	struct lttng_condition *condition)
	165	{
	166	struct lttng_condition_session_rotation *rotation;
	167
	168	rotation = container_of(condition,
	169	struct lttng_condition_session_rotation, parent);
	170
	171	free(rotation->session_name);
	172	free(rotation);
	173	}
	174
	175	static
	176	struct lttng_condition *lttng_condition_session_rotation_create(
	177	enum lttng_condition_type type)
	178	{
	179	struct lttng_condition_session_rotation *condition;
	180
	181	condition = zmalloc(sizeof(struct lttng_condition_session_rotation));
	182	if (!condition) {
	183	return NULL;
	184	}
	185
	186	memcpy(&condition->parent, &rotation_condition_template,
a38478c9	187	sizeof(condition->parent));
c19092cd JG	188	lttng_condition_init(&condition->parent, type);
	189	return &condition->parent;
	190	}
	191
	192	struct lttng_condition *lttng_condition_session_rotation_ongoing_create(void)
	193	{
	194	return lttng_condition_session_rotation_create(
	195	LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING);
	196	}
	197
	198	struct lttng_condition *lttng_condition_session_rotation_completed_create(void)
	199	{
	200	return lttng_condition_session_rotation_create(
	201	LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED);
	202	}
	203
	204	static
c0a66c84 JG	205	ssize_t init_condition_from_payload(struct lttng_condition *condition,
c0a66c84 JG	206	struct lttng_payload_view *src_view)
c19092cd JG	207	{
	208	ssize_t ret, condition_size;
	209	enum lttng_condition_status status;
	210	const struct lttng_condition_session_rotation_comm *condition_comm;
	211	const char *session_name;
	212	struct lttng_buffer_view name_view;
	213
c0a66c84	214	if (src_view->buffer.size < sizeof(*condition_comm)) {
c19092cd JG	215	ERR("Failed to initialize from malformed condition buffer: buffer too short to contain header");
	216	ret = -1;
	217	goto end;
	218	}
	219
c0a66c84 JG	220	condition_comm = (typeof(condition_comm)) src_view->buffer.data;
c0a66c84 JG	221	name_view = lttng_buffer_view_from_view(&src_view->buffer,
c19092cd JG	222	sizeof(*condition_comm), -1);
	223
	224	if (condition_comm->session_name_len > LTTNG_NAME_MAX) {
	225	ERR("Failed to initialize from malformed condition buffer: name exceeds LTTNG_MAX_NAME");
	226	ret = -1;
	227	goto end;
	228	}
	229
	230	if (name_view.size < condition_comm->session_name_len) {
	231	ERR("Failed to initialize from malformed condition buffer: buffer too short to contain session name");
	232	ret = -1;
	233	goto end;
	234	}
	235
	236	session_name = name_view.data;
	237	if (*(session_name + condition_comm->session_name_len - 1) != '\0') {
	238	ERR("Malformed session name encountered in condition buffer");
	239	ret = -1;
	240	goto end;
	241	}
	242
	243	status = lttng_condition_session_rotation_set_session_name(condition,
	244	session_name);
	245	if (status != LTTNG_CONDITION_STATUS_OK) {
	246	ERR("Failed to set buffer consumed session name");
	247	ret = -1;
	248	goto end;
	249	}
	250
	251	if (!lttng_condition_validate(condition)) {
	252	ret = -1;
	253	goto end;
	254	}
	255
	256	condition_size = sizeof(*condition_comm) +
	257	(ssize_t) condition_comm->session_name_len;
	258	ret = condition_size;
	259	end:
	260	return ret;
	261	}
	262
	263	static
c0a66c84 JG	264	ssize_t lttng_condition_session_rotation_create_from_payload(
c0a66c84 JG	265	struct lttng_payload_view *view,
c19092cd JG	266	struct lttng_condition **_condition,
	267	enum lttng_condition_type type)
	268	{
	269	ssize_t ret;
	270	struct lttng_condition *condition = NULL;
	271
	272	switch (type) {
	273	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING:
	274	condition = lttng_condition_session_rotation_ongoing_create();
	275	break;
	276	case LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED:
	277	condition = lttng_condition_session_rotation_completed_create();
	278	break;
	279	default:
	280	ret = -1;
	281	goto error;
	282	}
	283
	284	if (!_condition \|\| !condition) {
	285	ret = -1;
	286	goto error;
	287	}
	288
c0a66c84	289	ret = init_condition_from_payload(condition, view);
c19092cd JG	290	if (ret < 0) {
	291	goto error;
	292	}
	293
	294	*_condition = condition;
	295	return ret;
	296	error:
	297	lttng_condition_destroy(condition);
	298	return ret;
	299	}
	300
	301	LTTNG_HIDDEN
c0a66c84 JG	302	ssize_t lttng_condition_session_rotation_ongoing_create_from_payload(
c0a66c84 JG	303	struct lttng_payload_view *view,
c19092cd JG	304	struct lttng_condition **condition)
c19092cd JG	305	{
c0a66c84	306	return lttng_condition_session_rotation_create_from_payload(view,
c19092cd JG	307	condition,
	308	LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING);
	309	}
	310
	311	LTTNG_HIDDEN
c0a66c84 JG	312	ssize_t lttng_condition_session_rotation_completed_create_from_payload(
c0a66c84 JG	313	struct lttng_payload_view *view,
c19092cd JG	314	struct lttng_condition **condition)
c19092cd JG	315	{
c0a66c84	316	return lttng_condition_session_rotation_create_from_payload(view,
c19092cd JG	317	condition,
	318	LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED);
	319	}
	320
	321	static
	322	struct lttng_evaluation *lttng_evaluation_session_rotation_create(
	323	enum lttng_condition_type type, uint64_t id,
	324	struct lttng_trace_archive_location *location)
	325	{
	326	struct lttng_evaluation_session_rotation *evaluation;
	327
	328	evaluation = zmalloc(sizeof(struct lttng_evaluation_session_rotation));
	329	if (!evaluation) {
	330	return NULL;
	331	}
	332
	333	memcpy(&evaluation->parent, &rotation_evaluation_template,
a38478c9	334	sizeof(evaluation->parent));
c19092cd JG	335	lttng_evaluation_init(&evaluation->parent, type);
	336	evaluation->id = id;
	337	evaluation->location = location;
	338	return &evaluation->parent;
	339	}
	340
	341	static
c0a66c84	342	ssize_t create_evaluation_from_payload(
c19092cd	343	enum lttng_condition_type type,
c0a66c84	344	struct lttng_payload_view *view,
c19092cd JG	345	struct lttng_evaluation **_evaluation)
	346	{
	347	ssize_t ret, size;
	348	struct lttng_evaluation *evaluation = NULL;
	349	struct lttng_trace_archive_location *location = NULL;
	350	const struct lttng_evaluation_session_rotation_comm *comm =
c0a66c84 JG	351	(typeof(comm)) view->buffer.data;
c0a66c84 JG	352	struct lttng_buffer_view location_view;
c19092cd	353
c0a66c84	354	if (view->buffer.size < sizeof(*comm)) {
c19092cd JG	355	goto error;
	356	}
	357
	358	size = sizeof(*comm);
	359	if (comm->has_location) {
c0a66c84 JG	360	location_view = lttng_buffer_view_from_view(
c0a66c84 JG	361	&view->buffer, sizeof(*comm), -1);
c19092cd JG	362	if (!location_view.data) {
	363	goto error;
	364	}
	365
	366	ret = lttng_trace_archive_location_create_from_buffer(
	367	&location_view, &location);
	368	if (ret < 0) {
	369	goto error;
	370	}
	371	size += ret;
	372	}
	373
	374	evaluation = lttng_evaluation_session_rotation_create(type, comm->id,
	375	location);
	376	if (!evaluation) {
	377	goto error;
	378	}
	379
	380	ret = size;
	381	*_evaluation = evaluation;
	382	return ret;
	383	error:
	384	lttng_trace_archive_location_destroy(location);
	385	evaluation = NULL;
	386	return -1;
	387	}
	388
	389	static
c0a66c84	390	ssize_t lttng_evaluation_session_rotation_create_from_payload(
c19092cd	391	enum lttng_condition_type type,
c0a66c84	392	struct lttng_payload_view *view,
c19092cd JG	393	struct lttng_evaluation **_evaluation)
	394	{
	395	ssize_t ret;
	396	struct lttng_evaluation *evaluation = NULL;
	397
	398	if (!_evaluation) {
	399	ret = -1;
	400	goto error;
	401	}
	402
c0a66c84	403	ret = create_evaluation_from_payload(type, view, &evaluation);
c19092cd JG	404	if (ret < 0) {
	405	goto error;
	406	}
	407
	408	*_evaluation = evaluation;
	409	return ret;
	410	error:
	411	lttng_evaluation_destroy(evaluation);
	412	return ret;
	413	}
	414
	415	LTTNG_HIDDEN
c0a66c84 JG	416	ssize_t lttng_evaluation_session_rotation_ongoing_create_from_payload(
c0a66c84 JG	417	struct lttng_payload_view *view,
c19092cd JG	418	struct lttng_evaluation **evaluation)
c19092cd JG	419	{
c0a66c84	420	return lttng_evaluation_session_rotation_create_from_payload(
c19092cd JG	421	LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING,
	422	view, evaluation);
	423	}
	424
	425	LTTNG_HIDDEN
c0a66c84 JG	426	ssize_t lttng_evaluation_session_rotation_completed_create_from_payload(
c0a66c84 JG	427	struct lttng_payload_view *view,
c19092cd JG	428	struct lttng_evaluation **evaluation)
c19092cd JG	429	{
c0a66c84	430	return lttng_evaluation_session_rotation_create_from_payload(
c19092cd JG	431	LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED,
	432	view, evaluation);
	433	}
	434
	435	LTTNG_HIDDEN
	436	struct lttng_evaluation *lttng_evaluation_session_rotation_ongoing_create(
	437	uint64_t id)
	438	{
	439	return lttng_evaluation_session_rotation_create(
	440	LTTNG_CONDITION_TYPE_SESSION_ROTATION_ONGOING, id,
	441	NULL);
	442	}
	443
	444	LTTNG_HIDDEN
	445	struct lttng_evaluation *lttng_evaluation_session_rotation_completed_create(
	446	uint64_t id, struct lttng_trace_archive_location *location)
	447	{
	448	return lttng_evaluation_session_rotation_create(
	449	LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED, id,
	450	location);
	451	}
	452
	453	enum lttng_condition_status
	454	lttng_condition_session_rotation_get_session_name(
	455	const struct lttng_condition *condition,
	456	const char **session_name)
	457	{
	458	struct lttng_condition_session_rotation *rotation;
	459	enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
	460
	461	if (!condition \|\| !is_rotation_condition(condition) \|\| !session_name) {
	462	status = LTTNG_CONDITION_STATUS_INVALID;
	463	goto end;
	464	}
	465
	466	rotation = container_of(condition, struct lttng_condition_session_rotation,
	467	parent);
	468	if (!rotation->session_name) {
	469	status = LTTNG_CONDITION_STATUS_UNSET;
	470	goto end;
	471	}
	472	*session_name = rotation->session_name;
	473	end:
	474	return status;
	475	}
	476
	477	enum lttng_condition_status
	478	lttng_condition_session_rotation_set_session_name(
	479	struct lttng_condition condition, const char session_name)
	480	{
	481	char *session_name_copy;
	482	struct lttng_condition_session_rotation *rotation;
	483	enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK;
	484
	485	if (!condition \|\| !is_rotation_condition(condition) \|\|
	486	!session_name \|\| strlen(session_name) == 0) {
	487	status = LTTNG_CONDITION_STATUS_INVALID;
	488	goto end;
	489	}
	490
	491	rotation = container_of(condition,
	492	struct lttng_condition_session_rotation, parent);
	493	session_name_copy = strdup(session_name);
	494	if (!session_name_copy) {
495	status = LTTNG_CONDITION_STATUS_ERROR;
496	goto end;
497	}
498
499	free(rotation->session_name);
500	rotation->session_name = session_name_copy;
501	end:
502	return status;
503	}
504
505	static
506	int lttng_evaluation_session_rotation_serialize(
507	const struct lttng_evaluation *evaluation,
c0a66c84	508	struct lttng_payload *payload)
c19092cd JG	509	{
	510	int ret;
	511	struct lttng_evaluation_session_rotation *rotation;
	512	struct lttng_evaluation_session_rotation_comm comm = { 0 };
	513
	514	rotation = container_of(evaluation,
	515	struct lttng_evaluation_session_rotation, parent);
	516	comm.id = rotation->id;
	517	comm.has_location = !!rotation->location;
c0a66c84 JG	518	ret = lttng_dynamic_buffer_append(
c0a66c84 JG	519	&payload->buffer, &comm, sizeof(comm));
c19092cd JG	520	if (ret) {
	521	goto end;
	522	}
	523	if (!rotation->location) {
	524	goto end;
	525	}
	526	ret = lttng_trace_archive_location_serialize(rotation->location,
c0a66c84	527	&payload->buffer);
c19092cd JG	528	end:
	529	return ret;
	530	}
	531
	532	static
	533	void lttng_evaluation_session_rotation_destroy(
	534	struct lttng_evaluation *evaluation)
	535	{
	536	struct lttng_evaluation_session_rotation *rotation;
	537
	538	rotation = container_of(evaluation,
	539	struct lttng_evaluation_session_rotation, parent);
	540	lttng_trace_archive_location_destroy(rotation->location);
	541	free(rotation);
	542	}
	543
	544	enum lttng_evaluation_status
	545	lttng_evaluation_session_rotation_get_id(
	546	const struct lttng_evaluation evaluation, uint64_t id)
	547	{
	548	const struct lttng_evaluation_session_rotation *rotation;
	549	enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
	550
	551	if (!evaluation \|\| !id \|\| !is_rotation_evaluation(evaluation)) {
	552	status = LTTNG_EVALUATION_STATUS_INVALID;
	553	goto end;
	554	}
	555
	556	rotation = container_of(evaluation,
	557	struct lttng_evaluation_session_rotation, parent);
	558	*id = rotation->id;
	559	end:
	560	return status;
	561	}
	562
	563	enum lttng_evaluation_status
	564	lttng_evaluation_session_rotation_completed_get_location(
	565	const struct lttng_evaluation *evaluation,
	566	const struct lttng_trace_archive_location **location)
	567	{
	568	const struct lttng_evaluation_session_rotation *rotation;
	569	enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK;
	570
	571	if (!evaluation \|\| !location \|\|
	572	evaluation->type != LTTNG_CONDITION_TYPE_SESSION_ROTATION_COMPLETED) {
	573	status = LTTNG_EVALUATION_STATUS_INVALID;
	574	goto end;
	575	}
	576
	577	rotation = container_of(evaluation,
	578	struct lttng_evaluation_session_rotation, parent);
	579	*location = rotation->location;
	580	end:
	581	return status;
	582	}