struct lttng_channel *lttng_channel_create(struct lttng_domain *domain)
{
struct lttng_channel *channel = NULL;
- struct lttng_channel_extended *extended = NULL;
if (!domain) {
- goto error;
+ goto end;
}
/* Validate domain. */
case LTTNG_BUFFER_PER_PID:
break;
default:
- goto error;
+ goto end;
}
break;
case LTTNG_DOMAIN_KERNEL:
if (domain->buf_type != LTTNG_BUFFER_GLOBAL) {
- goto error;
+ goto end;
}
break;
default:
- goto error;
+ goto end;
}
- channel = (lttng_channel *) zmalloc(sizeof(*channel));
+ channel = lttng_channel_create_internal();
if (!channel) {
- goto error;
- }
-
- extended = (lttng_channel_extended *) zmalloc(sizeof(*extended));
- if (!extended) {
- goto error;
+ goto end;
}
- channel->attr.extended.ptr = extended;
-
lttng_channel_set_default_attr(domain, &channel->attr);
+end:
return channel;
-error:
- free(channel);
- free(extended);
- return NULL;
}
void lttng_channel_destroy(struct lttng_channel *channel)
{
enum lttng_error_code ret_code;
int ret;
+ struct lttng_dynamic_buffer buffer;
struct lttcomm_session_msg lsm;
uint64_t total_buffer_size_needed_per_cpu = 0;
+ struct lttng_channel *channel = NULL;
+
+ lttng_dynamic_buffer_init(&buffer);
/* NULL arguments are forbidden. No default values. */
if (handle == NULL || in_chan == NULL) {
- return -LTTNG_ERR_INVALID;
- }
-
- memset(&lsm, 0, sizeof(lsm));
- memcpy(&lsm.u.channel.chan, in_chan, sizeof(lsm.u.channel.chan));
- lsm.u.channel.chan.attr.extended.ptr = NULL;
-
- if (!in_chan->attr.extended.ptr) {
- struct lttng_channel *channel;
- struct lttng_channel_extended *extended;
-
- channel = lttng_channel_create(&handle->domain);
- if (!channel) {
- return -LTTNG_ERR_NOMEM;
- }
-
- /*
- * Create a new channel in order to use default extended
- * attribute values.
- */
- extended = (struct lttng_channel_extended *)
- channel->attr.extended.ptr;
- memcpy(&lsm.u.channel.extended, extended, sizeof(*extended));
- lttng_channel_destroy(channel);
- } else {
- struct lttng_channel_extended *extended;
-
- extended = (struct lttng_channel_extended *)
- in_chan->attr.extended.ptr;
- memcpy(&lsm.u.channel.extended, extended, sizeof(*extended));
+ ret = -LTTNG_ERR_INVALID;
+ goto end;
}
/*
* Verify that the amount of memory required to create the requested
* buffer is available on the system at the moment.
*/
- if (lsm.u.channel.chan.attr.num_subbuf >
- UINT64_MAX / lsm.u.channel.chan.attr.subbuf_size) {
+ if (in_chan->attr.num_subbuf >
+ UINT64_MAX / in_chan->attr.subbuf_size) {
/* Overflow */
ret = -LTTNG_ERR_OVERFLOW;
goto end;
}
- total_buffer_size_needed_per_cpu = lsm.u.channel.chan.attr.num_subbuf *
- lsm.u.channel.chan.attr.subbuf_size;
+ total_buffer_size_needed_per_cpu =
+ in_chan->attr.num_subbuf * in_chan->attr.subbuf_size;
ret_code = check_enough_available_memory(
total_buffer_size_needed_per_cpu);
if (ret_code != LTTNG_OK) {
goto end;
}
+ /* Copy the channel for easier manipulation. */
+ channel = lttng_channel_copy(in_chan);
+ if (!channel) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ /* Populate the channel extended attribute if necessary. */
+ if (!channel->attr.extended.ptr) {
+ struct lttng_channel_extended *extended =
+ (struct lttng_channel_extended *) zmalloc(
+ sizeof(*extended));
+
+ if (!extended) {
+ ret = -LTTNG_ERR_NOMEM;
+ goto end;
+ }
+ lttng_channel_set_default_extended_attr(
+ &handle->domain, extended);
+ channel->attr.extended.ptr = extended;
+ }
+
+ /* Prepare the payload */
+ memset(&lsm, 0, sizeof(lsm));
+
lsm.cmd_type = LTTNG_ENABLE_CHANNEL;
COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
goto end;
}
- ret = lttng_ctl_ask_sessiond(&lsm, NULL);
+ ret = lttng_channel_serialize(channel, &buffer);
+ if (ret) {
+ ret = -LTTNG_ERR_FATAL;
+ goto end;
+ }
+
+ lsm.u.channel.length = buffer.size;
+
+ ret = lttng_ctl_ask_sessiond_varlen_no_cmd_header(
+ &lsm, buffer.data, buffer.size, NULL);
end:
+ lttng_channel_destroy(channel);
+ lttng_dynamic_buffer_reset(&buffer);
return ret;
}
int lttng_list_channels(struct lttng_handle *handle,
struct lttng_channel **channels)
{
- int ret;
- size_t channel_count, i;
- const size_t channel_size = sizeof(struct lttng_channel) +
- sizeof(struct lttng_channel_extended);
+ int ret, total_payload_received;
struct lttcomm_session_msg lsm;
- char *extended_at;
+ char *reception_buffer = NULL;
+ size_t cmd_header_len = 0;
+ struct lttcomm_list_command_header *cmd_header = NULL;
+ struct lttng_dynamic_buffer tmp_buffer;
+
+ lttng_dynamic_buffer_init(&tmp_buffer);
if (handle == NULL) {
ret = -LTTNG_ERR_INVALID;
COPY_DOMAIN_PACKED(lsm.domain, handle->domain);
- ret = lttng_ctl_ask_sessiond(&lsm, (void**) channels);
+ ret = lttng_ctl_ask_sessiond_fds_varlen(&lsm, NULL, 0, NULL, 0,
+ (void **) &reception_buffer, (void **) &cmd_header,
+ &cmd_header_len);
if (ret < 0) {
goto end;
}
- if (ret % channel_size) {
- ret = -LTTNG_ERR_UNK;
- free(*channels);
- *channels = NULL;
+ total_payload_received = ret;
+
+ if (cmd_header_len != sizeof(*cmd_header)) {
+ ret = -LTTNG_ERR_FATAL;
goto end;
}
- channel_count = (size_t) ret / channel_size;
- /* Set extended info pointers */
- extended_at = ((char *) *channels) +
- channel_count * sizeof(struct lttng_channel);
- for (i = 0; i < channel_count; i++) {
- struct lttng_channel *chan = &(*channels)[i];
+ if (!cmd_header) {
+ ret = LTTNG_ERR_UNK;
+ goto end;
+ }
+
+ if (cmd_header->count > INT_MAX) {
+ ret = -LTTNG_ERR_OVERFLOW;
+ goto end;
+ }
- chan->attr.extended.ptr = extended_at;
- extended_at += sizeof(struct lttng_channel_extended);
+ {
+ enum lttng_error_code ret_code;
+ const struct lttng_buffer_view events_view =
+ lttng_buffer_view_init(reception_buffer, 0,
+ total_payload_received);
+
+ ret_code = lttng_channels_create_and_flatten_from_buffer(
+ &events_view, cmd_header->count, channels);
+ if (ret_code != LTTNG_OK) {
+ ret = -ret_code;
+ goto end;
+ }
}
- ret = (int) channel_count;
+ ret = (int) cmd_header->count;
end:
+ free(cmd_header);
+ free(reception_buffer);
return ret;
}
return;
}
+ /* Save the pointer for later use */
extended = (struct lttng_channel_extended *) attr->extended.ptr;
memset(attr, 0, sizeof(struct lttng_channel_attr));
attr->subbuf_size = default_get_kernel_channel_subbuf_size();
attr->num_subbuf = DEFAULT_KERNEL_CHANNEL_SUBBUF_NUM;
attr->output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
- if (extended) {
- extended->monitor_timer_interval =
- DEFAULT_KERNEL_CHANNEL_MONITOR_TIMER;
- extended->blocking_timeout =
- DEFAULT_KERNEL_CHANNEL_BLOCKING_TIMEOUT;
- }
break;
case LTTNG_DOMAIN_UST:
switch (domain->buf_type) {
DEFAULT_UST_UID_CHANNEL_SWITCH_TIMER;
attr->read_timer_interval =
DEFAULT_UST_UID_CHANNEL_READ_TIMER;
- if (extended) {
- extended->monitor_timer_interval =
- DEFAULT_UST_UID_CHANNEL_MONITOR_TIMER;
- extended->blocking_timeout =
- DEFAULT_UST_UID_CHANNEL_BLOCKING_TIMEOUT;
- }
break;
case LTTNG_BUFFER_PER_PID:
default:
DEFAULT_UST_PID_CHANNEL_SWITCH_TIMER;
attr->read_timer_interval =
DEFAULT_UST_PID_CHANNEL_READ_TIMER;
- if (extended) {
- extended->monitor_timer_interval =
- DEFAULT_UST_PID_CHANNEL_MONITOR_TIMER;
- extended->blocking_timeout =
- DEFAULT_UST_PID_CHANNEL_BLOCKING_TIMEOUT;
- }
break;
}
default:
break;
}
+ if (extended) {
+ lttng_channel_set_default_extended_attr(domain, extended);
+ }
+
+ /* Reassign the extended pointer. */
attr->extended.ptr = extended;
}
projects / lttng-tools.git / blobdiff