| 1 | #ifndef _LTT_DEBUGFS_ABI_H |
| 2 | #define _LTT_DEBUGFS_ABI_H |
| 3 | |
| 4 | /* |
| 5 | * ltt-debugfs-abi.h |
| 6 | * |
| 7 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * |
| 9 | * LTTng debugfs ABI header |
| 10 | */ |
| 11 | |
| 12 | #include <linux/fs.h> |
| 13 | |
| 14 | #define LTTNG_SYM_NAME_LEN 128 |
| 15 | |
| 16 | enum lttng_kernel_instrumentation { |
| 17 | LTTNG_KERNEL_TRACEPOINT, |
| 18 | LTTNG_KERNEL_KPROBE, |
| 19 | LTTNG_KERNEL_FUNCTION, |
| 20 | }; |
| 21 | |
| 22 | /* |
| 23 | * LTTng DebugFS ABI structures. |
| 24 | */ |
| 25 | |
| 26 | struct lttng_kernel_channel { |
| 27 | int overwrite; /* 1: overwrite, 0: discard */ |
| 28 | uint64_t subbuf_size; /* in bytes */ |
| 29 | uint64_t num_subbuf; |
| 30 | unsigned int switch_timer_interval; /* usecs */ |
| 31 | unsigned int read_timer_interval; /* usecs */ |
| 32 | }; |
| 33 | |
| 34 | struct lttng_kernel_tracepoint { |
| 35 | }; |
| 36 | |
| 37 | /* |
| 38 | * Either addr is used, or symbol_name and offset. |
| 39 | */ |
| 40 | struct lttng_kernel_kprobe { |
| 41 | uint64_t addr; |
| 42 | |
| 43 | uint64_t offset; |
| 44 | char symbol_name[LTTNG_SYM_NAME_LEN]; |
| 45 | }; |
| 46 | |
| 47 | struct lttng_kernel_function_tracer { |
| 48 | char symbol_name[LTTNG_SYM_NAME_LEN]; |
| 49 | }; |
| 50 | |
| 51 | struct lttng_kernel_event { |
| 52 | char name[LTTNG_SYM_NAME_LEN]; /* event name */ |
| 53 | enum lttng_kernel_instrumentation instrumentation; |
| 54 | /* Per instrumentation type configuration */ |
| 55 | union { |
| 56 | struct lttng_kernel_tracepoint tracepoint; |
| 57 | struct lttng_kernel_kprobe kprobe; |
| 58 | struct lttng_kernel_function_tracer ftrace; |
| 59 | } u; |
| 60 | }; |
| 61 | |
| 62 | struct lttng_kernel_tracer_version { |
| 63 | uint32_t version; |
| 64 | uint32_t patchlevel; |
| 65 | uint32_t sublevel; |
| 66 | }; |
| 67 | |
| 68 | /* LTTng file descriptor ioctl */ |
| 69 | #define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40) |
| 70 | #define LTTNG_KERNEL_TRACER_VERSION \ |
| 71 | _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version) |
| 72 | |
| 73 | /* Session FD ioctl */ |
| 74 | #define LTTNG_KERNEL_METADATA \ |
| 75 | _IOW(0xF6, 0x50, struct lttng_kernel_channel) |
| 76 | #define LTTNG_KERNEL_CHANNEL \ |
| 77 | _IOW(0xF6, 0x51, struct lttng_kernel_channel) |
| 78 | #define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52) |
| 79 | #define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53) |
| 80 | |
| 81 | /* Channel FD ioctl */ |
| 82 | #define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60) |
| 83 | #define LTTNG_KERNEL_EVENT \ |
| 84 | _IOW(0xF6, 0x61, struct lttng_kernel_event) |
| 85 | |
| 86 | #endif /* _LTT_DEBUGFS_ABI_H */ |