ltt/branches/poly/libltt/libltt.h

   1 /* libltt header file
   2  *
   3  * Copyright 2005-
   4  *     Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
   5  *
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  *
  18  * Inspired from iptables, by James Morris <jmorris@intercode.com.au>.
  19  *
  20  */
  21
  22 #ifndef _LIBLTT_H
  23 #define _LIBLTT_H
  24
  25 #include <linux/limits.h>
  26 #include <asm/types.h>
  27 #include <linux/netlink.h>
  28
  29 #ifndef NETLINK_LTT
  30 #define NETLINK_LTT 12
  31 #endif
  32
  33
  34 enum trace_op {
  35         OP_CREATE,
  36         OP_DESTROY,
  37         OP_START,
  38         OP_STOP,
  39         OP_NONE
  40 };
  41
  42 enum trace_mode {
  43         LTT_TRACE_NORMAL,
  44         LTT_TRACE_FLIGHT
  45 };
  46
  47
  48 struct lttctl_handle
  49 {
  50   int fd;
  51   //u_int8_t blocking;
  52   struct sockaddr_nl local;
  53   struct sockaddr_nl peer;
  54 };
  55
  56 typedef struct lttctl_peer_msg {
  57         char trace_name[NAME_MAX];
  58         enum trace_op op;
  59         union {
  60                 enum trace_mode mode;
  61         } args;
  62 } lttctl_peer_msg_t;
  63
  64 typedef struct lttctl_resp_msg {
  65         int err;
  66 } lttctl_resp_msg_t;
  67
  68 struct lttctl_handle *lttctl_create_handle(void);
  69
  70 int lttctl_destroy_handle(struct lttctl_handle *h);
  71
  72
  73 int lttctl_create_trace(const struct lttctl_handle * handle,
  74                 char *name, enum trace_mode mode);
  75
  76 int lttctl_destroy_trace(const struct lttctl_handle *handle, char *name);
  77
  78 int lttctl_start(const struct lttctl_handle *handle, char *name);
  79
  80 int lttctl_stop(const struct lttctl_handle *handle, char *name);
  81
  82 #define LTTCTLM_BASE    0x10
  83 #define LTTCTLM_CONTROL (LTTCTLM_BASE + 1)      /* LTT control message */
  84
  85
  86 #endif //_LIBLTT_H