| 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 <sys/socket.h> |
| 28 | #include <linux/netlink.h> |
| 29 | |
| 30 | #ifndef NETLINK_LTT |
| 31 | #define NETLINK_LTT 31 |
| 32 | #endif |
| 33 | |
| 34 | |
| 35 | enum trace_op { |
| 36 | OP_CREATE, |
| 37 | OP_DESTROY, |
| 38 | OP_START, |
| 39 | OP_STOP, |
| 40 | OP_NONE |
| 41 | }; |
| 42 | |
| 43 | enum trace_mode { |
| 44 | LTT_TRACE_NORMAL, |
| 45 | LTT_TRACE_FLIGHT, |
| 46 | LTT_TRACE_HYBRID |
| 47 | }; |
| 48 | |
| 49 | typedef struct lttctl_peer_msg { |
| 50 | char trace_name[NAME_MAX]; |
| 51 | char trace_type[NAME_MAX]; |
| 52 | enum trace_op op; |
| 53 | union { |
| 54 | struct { |
| 55 | enum trace_mode mode; |
| 56 | unsigned subbuf_size_low; |
| 57 | unsigned n_subbufs_low; |
| 58 | unsigned subbuf_size_med; |
| 59 | unsigned n_subbufs_med; |
| 60 | unsigned subbuf_size_high; |
| 61 | unsigned n_subbufs_high; |
| 62 | } new_trace; |
| 63 | } args; |
| 64 | } lttctl_peer_msg_t; |
| 65 | |
| 66 | |
| 67 | struct lttctl_handle |
| 68 | { |
| 69 | int fd; |
| 70 | //u_int8_t blocking; |
| 71 | struct sockaddr_nl local; |
| 72 | struct sockaddr_nl peer; |
| 73 | }; |
| 74 | |
| 75 | typedef struct lttctl_resp_msg { |
| 76 | int err; |
| 77 | } lttctl_resp_msg_t; |
| 78 | |
| 79 | struct lttctl_handle *lttctl_create_handle(void); |
| 80 | |
| 81 | int lttctl_destroy_handle(struct lttctl_handle *h); |
| 82 | |
| 83 | |
| 84 | int lttctl_create_trace(const struct lttctl_handle *h, |
| 85 | char *name, enum trace_mode mode, char *trace_type, |
| 86 | unsigned subbuf_size_low, unsigned n_subbufs_low, |
| 87 | unsigned subbuf_size_med, unsigned n_subbufs_med, |
| 88 | unsigned subbuf_size_high, unsigned n_subbufs_high); |
| 89 | |
| 90 | int lttctl_destroy_trace(const struct lttctl_handle *handle, char *name); |
| 91 | |
| 92 | int lttctl_start(const struct lttctl_handle *handle, char *name); |
| 93 | |
| 94 | int lttctl_stop(const struct lttctl_handle *handle, char *name); |
| 95 | |
| 96 | #define LTTCTLM_BASE 0x10 |
| 97 | #define LTTCTLM_CONTROL (LTTCTLM_BASE + 1) /* LTT control message */ |
| 98 | |
| 99 | #endif //_LIBLTT_H |