[PATCH 6/16] LTTng 0.6.36 for 2.6.18 : Core facility headers

[Mathieu Desnoyers]

Facility (event group) "core". Headers.

patch06-2.6.18-lttng-core-0.6.36-facility-core-headers.diff

Signed-off-by : Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx>

--BEGIN--
--- /dev/null
+++ b/include/ltt/ltt-facility-core.h
@@ -0,0 +1,836 @@
+#ifndef _LTT_FACILITY_CORE_H_
+#define _LTT_FACILITY_CORE_H_
+
+#include <linux/types.h>
+#include <ltt/ltt-facility-id-core.h>
+#include <ltt/ltt-tracer.h>
+
+/* Named types */
+
+/* Event facility_load structures */
+static inline void lttng_write_string_core_facility_load_name(
+		char *buffer,
+		size_t *to_base,
+		size_t *to,
+		const char **from,
+		size_t *len,
+		const char * obj)
+{
+	size_t size;
+	size_t align;
+
+	/* Flush pending memcpy */
+	if (*len != 0) {
+		if (buffer != NULL)
+			memcpy(buffer+*to_base+*to, *from, *len);
+	}
+	*to += *len;
+	*len = 0;
+
+	align = sizeof(char);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	/* Contains variable sized fields : must explode the structure */
+
+	size = strlen(obj) + 1; /* Include final NULL char. */
+	if (buffer != NULL)
+		memcpy(buffer+*to_base+*to, obj, size);
+	*to += size;
+
+	/* Realign the *to_base on arch size, set *to to 0 */
+	*to += ltt_align(*to, sizeof(void *));
+	*to_base = *to_base+*to;
+	*to = 0;
+
+	/* Put source *from just after the C string */
+	*from += size;
+}
+
+
+/* Event facility_load logging function */
+static inline void trace_core_facility_load(
+		const char * lttng_param_name,
+		unsigned int lttng_param_checksum,
+		unsigned int lttng_param_id,
+		unsigned int lttng_param_int_size,
+		unsigned int lttng_param_long_size,
+		unsigned int lttng_param_pointer_size,
+		unsigned int lttng_param_size_t_size,
+		unsigned int lttng_param_has_alignment)
+{
+	unsigned int index;
+	struct ltt_channel_struct *channel;
+	struct ltt_trace_struct *trace;
+	void *transport_data;
+	char *buffer = NULL;
+	size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */
+	size_t *to_base = &real_to_base;
+	size_t real_to = 0;
+	size_t *to = &real_to;
+	size_t real_len = 0;
+	size_t *len = &real_len;
+	size_t reserve_size;
+	size_t slot_size;
+	size_t align;
+	const char *real_from;
+	const char **from = &real_from;
+	u64 tsc;
+	size_t before_hdr_pad, after_hdr_pad, header_size;
+
+	if (ltt_traces.num_active_traces == 0)
+		return;
+
+	/* For each field, calculate the field size. */
+	/* size = *to_base + *to + *len */
+	/* Assume that the padding for alignment starts at a
+	 * sizeof(void *) address. */
+
+	*from = (const char*)lttng_param_name;
+	lttng_write_string_core_facility_load_name(buffer, to_base, to, from, len, lttng_param_name);
+
+	*from = (const char*)&lttng_param_checksum;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_id;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_int_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_long_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_pointer_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_size_t_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_has_alignment;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	reserve_size = *to_base + *to + *len;
+	preempt_disable();
+	ltt_nesting[smp_processor_id()]++;
+	index = ltt_get_index_from_facility_core(						event_core_facility_load);
+
+	list_for_each_entry_rcu(trace, &ltt_traces.head, list) {
+		if (!trace->active)
+			continue;
+
+		channel = ltt_get_channel_from_index(trace, index);
+
+		slot_size = 0;
+		buffer = ltt_reserve_slot(trace, channel, &transport_data,
+			reserve_size, &slot_size, &tsc,
+			&before_hdr_pad, &after_hdr_pad, &header_size);
+		if (!buffer)
+			continue; /* buffer full */
+
+		*to_base = *to = *len = 0;
+
+		ltt_write_event_header(trace, channel, buffer,
+			ltt_facility_core_1A8DE486, event_core_facility_load,
+			reserve_size, before_hdr_pad, tsc);
+		*to_base += before_hdr_pad + after_hdr_pad + header_size;
+
+		*from = (const char*)lttng_param_name;
+		lttng_write_string_core_facility_load_name(buffer, to_base, to, from, len, lttng_param_name);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_checksum;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_id;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_int_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_long_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_pointer_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_size_t_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_has_alignment;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		ltt_commit_slot(channel, &transport_data, buffer, slot_size);
+
+	}
+
+	ltt_nesting[smp_processor_id()]--;
+	preempt_enable_no_resched();
+}
+
+/* Event facility_unload structures */
+
+/* Event facility_unload logging function */
+static inline void trace_core_facility_unload(
+		unsigned int lttng_param_id)
+{
+	unsigned int index;
+	struct ltt_channel_struct *channel;
+	struct ltt_trace_struct *trace;
+	void *transport_data;
+	char *buffer = NULL;
+	size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */
+	size_t *to_base = &real_to_base;
+	size_t real_to = 0;
+	size_t *to = &real_to;
+	size_t real_len = 0;
+	size_t *len = &real_len;
+	size_t reserve_size;
+	size_t slot_size;
+	size_t align;
+	const char *real_from;
+	const char **from = &real_from;
+	u64 tsc;
+	size_t before_hdr_pad, after_hdr_pad, header_size;
+
+	if (ltt_traces.num_active_traces == 0)
+		return;
+
+	/* For each field, calculate the field size. */
+	/* size = *to_base + *to + *len */
+	/* Assume that the padding for alignment starts at a
+	 * sizeof(void *) address. */
+
+	*from = (const char*)&lttng_param_id;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	reserve_size = *to_base + *to + *len;
+	preempt_disable();
+	ltt_nesting[smp_processor_id()]++;
+	index = ltt_get_index_from_facility_core(						event_core_facility_unload);
+
+	list_for_each_entry_rcu(trace, &ltt_traces.head, list) {
+		if (!trace->active)
+			continue;
+
+		channel = ltt_get_channel_from_index(trace, index);
+
+		slot_size = 0;
+		buffer = ltt_reserve_slot(trace, channel, &transport_data,
+			reserve_size, &slot_size, &tsc,
+			&before_hdr_pad, &after_hdr_pad, &header_size);
+		if (!buffer)
+			continue; /* buffer full */
+
+		*to_base = *to = *len = 0;
+
+		ltt_write_event_header(trace, channel, buffer,
+			ltt_facility_core_1A8DE486, event_core_facility_unload,
+			reserve_size, before_hdr_pad, tsc);
+		*to_base += before_hdr_pad + after_hdr_pad + header_size;
+
+		*from = (const char*)&lttng_param_id;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		ltt_commit_slot(channel, &transport_data, buffer, slot_size);
+
+	}
+
+	ltt_nesting[smp_processor_id()]--;
+	preempt_enable_no_resched();
+}
+
+/* Event time_heartbeat structures */
+
+/* Event time_heartbeat logging function */
+static inline void trace_core_time_heartbeat(
+unsigned int tracefile_index)
+{
+	unsigned int index;
+	struct ltt_channel_struct *channel;
+	struct ltt_trace_struct *trace;
+	void *transport_data;
+	char *buffer = NULL;
+	size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */
+	size_t *to_base = &real_to_base;
+	size_t real_to = 0;
+	size_t *to = &real_to;
+	size_t real_len = 0;
+	size_t *len = &real_len;
+	size_t reserve_size;
+	size_t slot_size;
+	u64 tsc;
+	size_t before_hdr_pad, after_hdr_pad, header_size;
+
+	if (ltt_traces.num_active_traces == 0)
+		return;
+
+	/* For each field, calculate the field size. */
+	/* size = *to_base + *to + *len */
+	/* Assume that the padding for alignment starts at a
+	 * sizeof(void *) address. */
+
+	reserve_size = *to_base + *to + *len;
+	preempt_disable();
+	ltt_nesting[smp_processor_id()]++;
+	index = tracefile_index;
+
+	list_for_each_entry_rcu(trace, &ltt_traces.head, list) {
+		if (!trace->active)
+			continue;
+
+		channel = ltt_get_channel_from_index(trace, index);
+
+		slot_size = 0;
+		buffer = ltt_reserve_slot(trace, channel, &transport_data,
+			reserve_size, &slot_size, &tsc,
+			&before_hdr_pad, &after_hdr_pad, &header_size);
+		if (!buffer)
+			continue; /* buffer full */
+
+		*to_base = *to = *len = 0;
+
+		ltt_write_event_header(trace, channel, buffer,
+			ltt_facility_core_1A8DE486, event_core_time_heartbeat,
+			reserve_size, before_hdr_pad, tsc);
+		*to_base += before_hdr_pad + after_hdr_pad + header_size;
+
+		ltt_commit_slot(channel, &transport_data, buffer, slot_size);
+
+	}
+
+	ltt_nesting[smp_processor_id()]--;
+	preempt_enable_no_resched();
+}
+
+/* Event state_dump_facility_load structures */
+static inline void lttng_write_string_core_state_dump_facility_load_name(
+		char *buffer,
+		size_t *to_base,
+		size_t *to,
+		const char **from,
+		size_t *len,
+		const char * obj)
+{
+	size_t size;
+	size_t align;
+
+	/* Flush pending memcpy */
+	if (*len != 0) {
+		if (buffer != NULL)
+			memcpy(buffer+*to_base+*to, *from, *len);
+	}
+	*to += *len;
+	*len = 0;
+
+	align = sizeof(char);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	/* Contains variable sized fields : must explode the structure */
+
+	size = strlen(obj) + 1; /* Include final NULL char. */
+	if (buffer != NULL)
+		memcpy(buffer+*to_base+*to, obj, size);
+	*to += size;
+
+	/* Realign the *to_base on arch size, set *to to 0 */
+	*to += ltt_align(*to, sizeof(void *));
+	*to_base = *to_base+*to;
+	*to = 0;
+
+	/* Put source *from just after the C string */
+	*from += size;
+}
+
+
+/* Event state_dump_facility_load logging function */
+static inline void trace_core_state_dump_facility_load(
+		struct ltt_trace_struct *dest_trace,
+		const char * lttng_param_name,
+		unsigned int lttng_param_checksum,
+		unsigned int lttng_param_id,
+		unsigned int lttng_param_int_size,
+		unsigned int lttng_param_long_size,
+		unsigned int lttng_param_pointer_size,
+		unsigned int lttng_param_size_t_size,
+		unsigned int lttng_param_has_alignment)
+{
+	unsigned int index;
+	struct ltt_channel_struct *channel;
+	struct ltt_trace_struct *trace;
+	void *transport_data;
+	char *buffer = NULL;
+	size_t real_to_base = 0; /* The buffer is allocated on arch_size alignment */
+	size_t *to_base = &real_to_base;
+	size_t real_to = 0;
+	size_t *to = &real_to;
+	size_t real_len = 0;
+	size_t *len = &real_len;
+	size_t reserve_size;
+	size_t slot_size;
+	size_t align;
+	const char *real_from;
+	const char **from = &real_from;
+	u64 tsc;
+	size_t before_hdr_pad, after_hdr_pad, header_size;
+
+	if (ltt_traces.num_active_traces == 0)
+		return;
+
+	/* For each field, calculate the field size. */
+	/* size = *to_base + *to + *len */
+	/* Assume that the padding for alignment starts at a
+	 * sizeof(void *) address. */
+
+	*from = (const char*)lttng_param_name;
+	lttng_write_string_core_state_dump_facility_load_name(buffer, to_base, to, from, len, lttng_param_name);
+
+	*from = (const char*)&lttng_param_checksum;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_id;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_int_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_long_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_pointer_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_size_t_size;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	*from = (const char*)&lttng_param_has_alignment;
+	align = sizeof(unsigned int);
+
+	if (*len == 0) {
+		*to += ltt_align(*to, align); /* align output */
+	} else {
+		*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+	}
+
+	*len += sizeof(unsigned int);
+
+	reserve_size = *to_base + *to + *len;
+	preempt_disable();
+	ltt_nesting[smp_processor_id()]++;
+	index = ltt_get_index_from_facility_core(						event_core_state_dump_facility_load);
+
+	list_for_each_entry_rcu(trace, &ltt_traces.head, list) {
+		if (!trace->active)
+			continue;
+
+		if (dest_trace != trace)
+			continue;
+
+		channel = ltt_get_channel_from_index(trace, index);
+
+		slot_size = 0;
+		buffer = ltt_reserve_slot(trace, channel, &transport_data,
+			reserve_size, &slot_size, &tsc,
+			&before_hdr_pad, &after_hdr_pad, &header_size);
+		if (!buffer)
+			continue; /* buffer full */
+
+		*to_base = *to = *len = 0;
+
+		ltt_write_event_header(trace, channel, buffer,
+			ltt_facility_core_1A8DE486, event_core_state_dump_facility_load,
+			reserve_size, before_hdr_pad, tsc);
+		*to_base += before_hdr_pad + after_hdr_pad + header_size;
+
+		*from = (const char*)lttng_param_name;
+		lttng_write_string_core_state_dump_facility_load_name(buffer, to_base, to, from, len, lttng_param_name);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_checksum;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_id;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_int_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_long_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_pointer_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_size_t_size;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		*from = (const char*)&lttng_param_has_alignment;
+		align = sizeof(unsigned int);
+
+		if (*len == 0) {
+			*to += ltt_align(*to, align); /* align output */
+		} else {
+			*len += ltt_align(*to+*len, align); /* alignment, ok to do a memcpy of it */
+		}
+
+		*len += sizeof(unsigned int);
+
+		/* Flush pending memcpy */
+		if (*len != 0) {
+			memcpy(buffer+*to_base+*to, *from, *len);
+			*to += *len;
+			*len = 0;
+		}
+
+		ltt_commit_slot(channel, &transport_data, buffer, slot_size);
+
+	}
+
+	ltt_nesting[smp_processor_id()]--;
+	preempt_enable_no_resched();
+}
+
+#endif //_LTT_FACILITY_CORE_H_
--- /dev/null
+++ b/include/ltt/ltt-facility-id-core.h
@@ -0,0 +1,24 @@
+#ifndef _LTT_FACILITY_ID_CORE_H_
+#define _LTT_FACILITY_ID_CORE_H_
+
+#ifdef CONFIG_LTT
+#include <linux/ltt-facilities.h>
+
+/****  facility handle  ****/
+
+extern ltt_facility_t ltt_facility_core_1A8DE486;
+extern ltt_facility_t ltt_facility_core;
+
+
+/****  event index  ****/
+
+enum core_event {
+	event_core_facility_load,
+	event_core_facility_unload,
+	event_core_time_heartbeat,
+	event_core_state_dump_facility_load,
+	facility_core_num_events
+};
+
+#endif //CONFIG_LTT
+#endif //_LTT_FACILITY_ID_CORE_H_
--- /dev/null
+++ b/include/ltt/ltt-facility-select-core.h
@@ -0,0 +1,33 @@
+#ifndef _LTT_FACILITY_SELECT_CORE_H_
+#define _LTT_FACILITY_SELECT_CORE_H_
+
+#ifdef CONFIG_LTT
+#include <linux/ltt-facilities.h>
+#include <ltt/ltt-facility-id-core.h>
+#include <ltt/ltt-tracer.h>
+
+/* ltt_get_index_from_facility
+ *
+ * Get channel index from facility and event id.
+ * 
+ * @fID : facility ID
+ * @eID : event number
+ *
+ * Get the channel index into which events must be written for the given
+ * facility and event number. We get this structure offset as soon as possible
+ * and remember it so we pass through this logic only once per trace call (not
+ * for every trace).
+ */
+static inline unsigned int ltt_get_index_from_facility_core(u8 eID)
+{
+	switch (eID) {
+		case event_core_facility_load:
+		case event_core_facility_unload:
+		case event_core_state_dump_facility_load:
+			return GET_CHANNEL_INDEX(facilities);
+		default:
+			return GET_CHANNEL_INDEX(cpu);
+	}
+}
+#endif //CONFIG_LTT
+#endif //_LTT_FACILITY_SELECT_CORE_H_
--END--

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