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/**
* @file op_interface.h
*
* Module / user space interface for 2.4
*
* @remark Copyright 2002 OProfile authors
* @remark Read the file COPYING
*
* @author John Levon
* @author Philippe Elie
*/
#ifndef OP_INTERFACE_H
#define OP_INTERFACE_H
#include "op_config.h"
#include "op_types.h"
/*@{\name notifications types encoded in op_note::type */
/** fork(),vfork(),clone() */
#define OP_FORK 1
/** mapping */
#define OP_MAP 2
/** execve() */
#define OP_EXEC 4
/** init_module() */
#define OP_DROP_MODULES 8
/** exit() */
#define OP_EXIT 16
/*@}*/
/** Data type to transfer samples counts from the module to the daemon */
struct op_sample {
unsigned long eip; /**< eip value where occur interrupt */
u32 counter; /**< counter nr */
u32 pid; /**< 32 bits can hold any pid */
u32 tgid; /**< always equal to pid for kernel < 2.4.0 */
};
/** the current kernel-side profiler state */
enum oprof_state {
STOPPED = 0,
STOPPING = 1,
RUNNING = 2
};
/**
* The head structure of a kernel sample buffer.
*/
struct op_buffer_head {
int cpu_nr; /**< the CPU number of this buffer */
size_t count; /**< number of samples in this buffer */
enum oprof_state state; /**< current profiler state */
struct op_sample buffer[0]; /**< the sample buffer */
} __attribute__((__packed__));
/**
* Data type used by the module to notify daemon of fork/exit/mapping etc.
* Meanings of fields depend on the type of notification encoded in the type
* field.
* \sa OP_FORK, OP_EXEC, OP_MAP, OP_DROP_MODULES and OP_EXIT
*/
struct op_note {
unsigned long addr;
unsigned long len;
unsigned long offset;
unsigned int hash;
unsigned int pid;
unsigned int tgid;
unsigned short type;
};
/**
* A path component. Directory name are stored as a stack of path components.
* Note than the name index acts also as an unique identifier
*/
struct op_hash_index {
/** index inside the string pool */
u32 name;
/** parent component, zero if this component is the root */
u32 parent;
} __attribute__((__packed__));
/** size of hash map in bytes */
#define OP_HASH_MAP_SIZE (OP_HASH_MAP_NR * sizeof(struct op_hash_index) + POOL_SIZE)
#endif /* OP_INTERFACE_H */