X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fconditions%2Fsession-rotation.c;fp=src%2Fcommon%2Fconditions%2Fsession-rotation.c;h=1c4124f6405ed13221f13d571444cb13fc5316b2;hp=0000000000000000000000000000000000000000;hb=1831ae68b70dece8e9b847081526495adbbf05e5;hpb=25357057de5ae4dd2a572e8f9b893c1b90cbd60a diff --git a/src/common/conditions/session-rotation.c b/src/common/conditions/session-rotation.c new file mode 100644 index 000000000..1c4124f64 --- /dev/null +++ b/src/common/conditions/session-rotation.c @@ -0,0 +1,588 @@ +/* + * Copyright (C) 2017 Jérémie Galarneau + * + * SPDX-License-Identifier: LGPL-2.1-only + * + */ + +#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, + int *fd_to_send); +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 *fd_to_send) +{ + 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; + } + + if (fd_to_send) { + /* No fd to send */ + *fd_to_send = -1; + } +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_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->parent)); + 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; +}