X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconditions%2Fsession-consumed-size.c;fp=src%2Fcommon%2Fconditions%2Fsession-consumed-size.c;h=6e0fcb49e14ced1428e2c83d2beb3646c4a592c1;hp=0000000000000000000000000000000000000000;hb=1831ae68b70dece8e9b847081526495adbbf05e5;hpb=25357057de5ae4dd2a572e8f9b893c1b90cbd60a diff --git a/src/common/conditions/session-consumed-size.c b/src/common/conditions/session-consumed-size.c new file mode 100644 index 000000000..6e0fcb49e --- /dev/null +++ b/src/common/conditions/session-consumed-size.c @@ -0,0 +1,462 @@ +/* + * Copyright (C) 2017 Jérémie Galarneau + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IS_CONSUMED_SIZE_CONDITION(condition) ( \ + lttng_condition_get_type(condition) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ + ) + +#define IS_CONSUMED_SIZE_EVALUATION(evaluation) ( \ + lttng_evaluation_get_type(evaluation) == LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE \ + ) + +static +void lttng_condition_session_consumed_size_destroy(struct lttng_condition *condition) +{ + struct lttng_condition_session_consumed_size *consumed_size; + + consumed_size = container_of(condition, + struct lttng_condition_session_consumed_size, parent); + + free(consumed_size->session_name); + free(consumed_size); +} + +static +bool lttng_condition_session_consumed_size_validate( + const struct lttng_condition *condition) +{ + bool valid = false; + struct lttng_condition_session_consumed_size *consumed; + + if (!condition) { + goto end; + } + + consumed = container_of(condition, struct lttng_condition_session_consumed_size, + parent); + if (!consumed->session_name) { + ERR("Invalid session consumed size condition: a target session name must be set."); + goto end; + } + if (!consumed->consumed_threshold_bytes.set) { + ERR("Invalid session consumed size condition: a threshold must be set."); + goto end; + } + + valid = true; +end: + return valid; +} + +static +int lttng_condition_session_consumed_size_serialize( + const struct lttng_condition *condition, + struct lttng_dynamic_buffer *buf, + int *fd_to_send) +{ + int ret; + size_t session_name_len; + struct lttng_condition_session_consumed_size *consumed; + struct lttng_condition_session_consumed_size_comm consumed_comm; + + if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { + ret = -1; + goto end; + } + + DBG("Serializing session consumed size condition"); + consumed = container_of(condition, + struct lttng_condition_session_consumed_size, + parent); + + session_name_len = strlen(consumed->session_name) + 1; + if (session_name_len > LTTNG_NAME_MAX) { + ret = -1; + goto end; + } + + consumed_comm.consumed_threshold_bytes = + consumed->consumed_threshold_bytes.value; + consumed_comm.session_name_len = (uint32_t) session_name_len; + + ret = lttng_dynamic_buffer_append(buf, &consumed_comm, + sizeof(consumed_comm)); + if (ret) { + goto end; + } + ret = lttng_dynamic_buffer_append(buf, consumed->session_name, + session_name_len); + if (ret) { + goto end; + } + + if (fd_to_send) { + /* No fd to send */ + *fd_to_send = -1; + } +end: + return ret; +} + +static +bool lttng_condition_session_consumed_size_is_equal(const struct lttng_condition *_a, + const struct lttng_condition *_b) +{ + bool is_equal = false; + struct lttng_condition_session_consumed_size *a, *b; + + a = container_of(_a, struct lttng_condition_session_consumed_size, parent); + b = container_of(_b, struct lttng_condition_session_consumed_size, parent); + + if (a->consumed_threshold_bytes.set && b->consumed_threshold_bytes.set) { + uint64_t a_value, b_value; + + a_value = a->consumed_threshold_bytes.value; + b_value = b->consumed_threshold_bytes.value; + if (a_value != b_value) { + goto end; + } + } + + assert(a->session_name); + assert(b->session_name); + if (strcmp(a->session_name, b->session_name)) { + goto end; + } + + is_equal = true; +end: + return is_equal; +} + +struct lttng_condition *lttng_condition_session_consumed_size_create(void) +{ + struct lttng_condition_session_consumed_size *condition; + + condition = zmalloc(sizeof(struct lttng_condition_session_consumed_size)); + if (!condition) { + return NULL; + } + + lttng_condition_init(&condition->parent, LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE); + condition->parent.validate = lttng_condition_session_consumed_size_validate; + condition->parent.serialize = lttng_condition_session_consumed_size_serialize; + condition->parent.equal = lttng_condition_session_consumed_size_is_equal; + condition->parent.destroy = lttng_condition_session_consumed_size_destroy; + return &condition->parent; +} + +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_consumed_size_comm *condition_comm; + const char *session_name; + struct lttng_buffer_view names_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_consumed_size_comm *) src_view->data; + names_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 (names_view.size < condition_comm->session_name_len) { + ERR("Failed to initialize from malformed condition buffer: buffer too short to contain element names"); + ret = -1; + goto end; + } + + status = lttng_condition_session_consumed_size_set_threshold(condition, + condition_comm->consumed_threshold_bytes); + if (status != LTTNG_CONDITION_STATUS_OK) { + ERR("Failed to initialize session consumed size condition threshold"); + ret = -1; + goto end; + } + + session_name = names_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_consumed_size_set_session_name(condition, + session_name); + if (status != LTTNG_CONDITION_STATUS_OK) { + ERR("Failed to set session consumed size condition's 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; +} + +LTTNG_HIDDEN +ssize_t lttng_condition_session_consumed_size_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_condition **_condition) +{ + ssize_t ret; + struct lttng_condition *condition = + lttng_condition_session_consumed_size_create(); + + 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; +} + +static +struct lttng_evaluation *create_evaluation_from_buffer( + const struct lttng_buffer_view *view) +{ + const struct lttng_evaluation_session_consumed_size_comm *comm = + (const struct lttng_evaluation_session_consumed_size_comm *) view->data; + struct lttng_evaluation *evaluation = NULL; + + if (view->size < sizeof(*comm)) { + goto end; + } + + evaluation = lttng_evaluation_session_consumed_size_create( + comm->session_consumed); +end: + return evaluation; +} + +LTTNG_HIDDEN +ssize_t lttng_evaluation_session_consumed_size_create_from_buffer( + const struct lttng_buffer_view *view, + struct lttng_evaluation **_evaluation) +{ + ssize_t ret; + struct lttng_evaluation *evaluation = NULL; + + if (!_evaluation) { + ret = -1; + goto error; + } + + evaluation = create_evaluation_from_buffer(view); + if (!evaluation) { + ret = -1; + goto error; + } + + *_evaluation = evaluation; + ret = sizeof(struct lttng_evaluation_session_consumed_size_comm); + return ret; +error: + lttng_evaluation_destroy(evaluation); + return ret; +} + +enum lttng_condition_status +lttng_condition_session_consumed_size_get_threshold( + const struct lttng_condition *condition, + uint64_t *consumed_threshold_bytes) +{ + struct lttng_condition_session_consumed_size *consumed; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !consumed_threshold_bytes) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + consumed = container_of(condition, struct lttng_condition_session_consumed_size, + parent); + if (!consumed->consumed_threshold_bytes.set) { + status = LTTNG_CONDITION_STATUS_UNSET; + goto end; + } + *consumed_threshold_bytes = consumed->consumed_threshold_bytes.value; +end: + return status; +} + +enum lttng_condition_status +lttng_condition_session_consumed_size_set_threshold( + struct lttng_condition *condition, uint64_t consumed_threshold_bytes) +{ + struct lttng_condition_session_consumed_size *consumed; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition)) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + consumed = container_of(condition, struct lttng_condition_session_consumed_size, + parent); + consumed->consumed_threshold_bytes.set = true; + consumed->consumed_threshold_bytes.value = consumed_threshold_bytes; +end: + return status; +} + +enum lttng_condition_status +lttng_condition_session_consumed_size_get_session_name( + const struct lttng_condition *condition, + const char **session_name) +{ + struct lttng_condition_session_consumed_size *consumed; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || !session_name) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + consumed = container_of(condition, struct lttng_condition_session_consumed_size, + parent); + if (!consumed->session_name) { + status = LTTNG_CONDITION_STATUS_UNSET; + goto end; + } + *session_name = consumed->session_name; +end: + return status; +} + +enum lttng_condition_status +lttng_condition_session_consumed_size_set_session_name( + struct lttng_condition *condition, const char *session_name) +{ + char *session_name_copy; + struct lttng_condition_session_consumed_size *consumed; + enum lttng_condition_status status = LTTNG_CONDITION_STATUS_OK; + + if (!condition || !IS_CONSUMED_SIZE_CONDITION(condition) || + !session_name || strlen(session_name) == 0) { + status = LTTNG_CONDITION_STATUS_INVALID; + goto end; + } + + consumed = container_of(condition, struct lttng_condition_session_consumed_size, + parent); + session_name_copy = strdup(session_name); + if (!session_name_copy) { + status = LTTNG_CONDITION_STATUS_ERROR; + goto end; + } + + if (consumed->session_name) { + free(consumed->session_name); + } + consumed->session_name = session_name_copy; +end: + return status; +} + +static +int lttng_evaluation_session_consumed_size_serialize( + const struct lttng_evaluation *evaluation, + struct lttng_dynamic_buffer *buf) +{ + struct lttng_evaluation_session_consumed_size *consumed; + struct lttng_evaluation_session_consumed_size_comm comm; + + consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, + parent); + comm.session_consumed = consumed->session_consumed; + return lttng_dynamic_buffer_append(buf, &comm, sizeof(comm)); +} + +static +void lttng_evaluation_session_consumed_size_destroy( + struct lttng_evaluation *evaluation) +{ + struct lttng_evaluation_session_consumed_size *consumed; + + consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, + parent); + free(consumed); +} + +LTTNG_HIDDEN +struct lttng_evaluation *lttng_evaluation_session_consumed_size_create( + uint64_t consumed) +{ + struct lttng_evaluation_session_consumed_size *consumed_eval; + + consumed_eval = zmalloc(sizeof(struct lttng_evaluation_session_consumed_size)); + if (!consumed_eval) { + goto end; + } + + consumed_eval->parent.type = LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE; + consumed_eval->session_consumed = consumed; + consumed_eval->parent.serialize = lttng_evaluation_session_consumed_size_serialize; + consumed_eval->parent.destroy = lttng_evaluation_session_consumed_size_destroy; +end: + return &consumed_eval->parent; +} + +enum lttng_evaluation_status +lttng_evaluation_session_consumed_size_get_consumed_size( + const struct lttng_evaluation *evaluation, + uint64_t *session_consumed) +{ + struct lttng_evaluation_session_consumed_size *consumed; + enum lttng_evaluation_status status = LTTNG_EVALUATION_STATUS_OK; + + if (!evaluation || !IS_CONSUMED_SIZE_EVALUATION(evaluation) || + !session_consumed) { + status = LTTNG_EVALUATION_STATUS_INVALID; + goto end; + } + + consumed = container_of(evaluation, struct lttng_evaluation_session_consumed_size, + parent); + *session_consumed = consumed->session_consumed; +end: + return status; +}