X-Git-Url: http://git.liburcu.org/?p=lttng-modules.git;a=blobdiff_plain;f=lttng-abi.h;h=3f2aefbea04cd1fa52909c7a7fe5b76ec047ab6f;hp=cb4898e30b29e75f6886baae978be91f6fbff93f;hb=refs%2Fheads%2Fstable-2.4;hpb=e8951e63e00a0b56d8ce1b0c821e5ebfb1e35d63 diff --git a/lttng-abi.h b/lttng-abi.h index cb4898e3..3f2aefbe 100644 --- a/lttng-abi.h +++ b/lttng-abi.h @@ -4,16 +4,28 @@ /* * lttng-abi.h * - * Copyright 2010 (c) - Mathieu Desnoyers + * LTTng ABI header * - * LTTng debugfs ABI header + * Copyright (C) 2010-2012 Mathieu Desnoyers * - * Dual LGPL v2.1/GPL v2 license. + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; only + * version 2.1 of the License. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include -#define LTTNG_SYM_NAME_LEN 256 +#define LTTNG_KERNEL_SYM_NAME_LEN 256 enum lttng_kernel_instrumentation { LTTNG_KERNEL_TRACEPOINT = 0, @@ -35,22 +47,23 @@ enum lttng_kernel_output { /* * LTTng DebugFS ABI structures. */ - +#define LTTNG_KERNEL_CHANNEL_PADDING LTTNG_KERNEL_SYM_NAME_LEN + 32 struct lttng_kernel_channel { - int overwrite; /* 1: overwrite, 0: discard */ uint64_t subbuf_size; /* in bytes */ uint64_t num_subbuf; unsigned int switch_timer_interval; /* usecs */ unsigned int read_timer_interval; /* usecs */ enum lttng_kernel_output output; /* splice, mmap */ -}; + int overwrite; /* 1: overwrite, 0: discard */ + char padding[LTTNG_KERNEL_CHANNEL_PADDING]; +}__attribute__((packed)); struct lttng_kernel_kretprobe { uint64_t addr; uint64_t offset; - char symbol_name[LTTNG_SYM_NAME_LEN]; -}; + char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN]; +}__attribute__((packed)); /* * Either addr is used, or symbol_name and offset. @@ -59,32 +72,37 @@ struct lttng_kernel_kprobe { uint64_t addr; uint64_t offset; - char symbol_name[LTTNG_SYM_NAME_LEN]; -}; + char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN]; +}__attribute__((packed)); struct lttng_kernel_function_tracer { - char symbol_name[LTTNG_SYM_NAME_LEN]; -}; + char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN]; +}__attribute__((packed)); /* * For syscall tracing, name = '\0' means "enable all". */ +#define LTTNG_KERNEL_EVENT_PADDING1 16 +#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32 struct lttng_kernel_event { - char name[LTTNG_SYM_NAME_LEN]; /* event name */ + char name[LTTNG_KERNEL_SYM_NAME_LEN]; /* event name */ enum lttng_kernel_instrumentation instrumentation; + char padding[LTTNG_KERNEL_EVENT_PADDING1]; + /* Per instrumentation type configuration */ union { struct lttng_kernel_kretprobe kretprobe; struct lttng_kernel_kprobe kprobe; struct lttng_kernel_function_tracer ftrace; + char padding[LTTNG_KERNEL_EVENT_PADDING2]; } u; -}; +}__attribute__((packed)); struct lttng_kernel_tracer_version { - uint32_t version; + uint32_t major; + uint32_t minor; uint32_t patchlevel; - uint32_t sublevel; -}; +}__attribute__((packed)); enum lttng_kernel_calibrate_type { LTTNG_KERNEL_CALIBRATE_KRETPROBE, @@ -92,7 +110,7 @@ enum lttng_kernel_calibrate_type { struct lttng_kernel_calibrate { enum lttng_kernel_calibrate_type type; /* type (input) */ -}; +}__attribute__((packed)); enum lttng_kernel_context_type { LTTNG_KERNEL_CONTEXT_PID = 0, @@ -105,49 +123,95 @@ enum lttng_kernel_context_type { LTTNG_KERNEL_CONTEXT_VTID = 7, LTTNG_KERNEL_CONTEXT_PPID = 8, LTTNG_KERNEL_CONTEXT_VPPID = 9, + LTTNG_KERNEL_CONTEXT_HOSTNAME = 10, }; struct lttng_kernel_perf_counter_ctx { uint32_t type; uint64_t config; - char name[LTTNG_SYM_NAME_LEN]; -}; + char name[LTTNG_KERNEL_SYM_NAME_LEN]; +}__attribute__((packed)); +#define LTTNG_KERNEL_CONTEXT_PADDING1 16 +#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32 struct lttng_kernel_context { enum lttng_kernel_context_type ctx; + char padding[LTTNG_KERNEL_CONTEXT_PADDING1]; + union { struct lttng_kernel_perf_counter_ctx perf_counter; + char padding[LTTNG_KERNEL_CONTEXT_PADDING2]; } u; -}; +}__attribute__((packed)); /* LTTng file descriptor ioctl */ -#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40) +#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x45) #define LTTNG_KERNEL_TRACER_VERSION \ - _IOR(0xF6, 0x41, struct lttng_kernel_tracer_version) -#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42) -#define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x43) + _IOR(0xF6, 0x46, struct lttng_kernel_tracer_version) +#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x47) +#define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x48) #define LTTNG_KERNEL_CALIBRATE \ - _IOWR(0xF6, 0x44, struct lttng_kernel_calibrate) + _IOWR(0xF6, 0x49, struct lttng_kernel_calibrate) /* Session FD ioctl */ #define LTTNG_KERNEL_METADATA \ - _IOW(0xF6, 0x50, struct lttng_kernel_channel) + _IOW(0xF6, 0x54, struct lttng_kernel_channel) #define LTTNG_KERNEL_CHANNEL \ - _IOW(0xF6, 0x51, struct lttng_kernel_channel) -#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52) -#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53) + _IOW(0xF6, 0x55, struct lttng_kernel_channel) +#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x56) +#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x57) /* Channel FD ioctl */ -#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60) +#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x62) #define LTTNG_KERNEL_EVENT \ - _IOW(0xF6, 0x61, struct lttng_kernel_event) + _IOW(0xF6, 0x63, struct lttng_kernel_event) /* Event and Channel FD ioctl */ #define LTTNG_KERNEL_CONTEXT \ - _IOW(0xF6, 0x70, struct lttng_kernel_context) + _IOW(0xF6, 0x71, struct lttng_kernel_context) /* Event, Channel and Session ioctl */ -#define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x80) -#define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x81) +#define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x82) +#define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x83) + +/* LTTng-specific ioctls for the lib ringbuffer */ +/* returns the timestamp begin of the current sub-buffer */ +#define LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN _IOR(0xF6, 0x20, uint64_t) +/* returns the timestamp end of the current sub-buffer */ +#define LTTNG_RING_BUFFER_GET_TIMESTAMP_END _IOR(0xF6, 0x21, uint64_t) +/* returns the number of events discarded */ +#define LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED _IOR(0xF6, 0x22, uint64_t) +/* returns the packet payload size */ +#define LTTNG_RING_BUFFER_GET_CONTENT_SIZE _IOR(0xF6, 0x23, uint64_t) +/* returns the actual packet size */ +#define LTTNG_RING_BUFFER_GET_PACKET_SIZE _IOR(0xF6, 0x24, uint64_t) +/* returns the stream id */ +#define LTTNG_RING_BUFFER_GET_STREAM_ID _IOR(0xF6, 0x25, uint64_t) +/* returns the current timestamp */ +#define LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP _IOR(0xF6, 0x26, uint64_t) + +#ifdef CONFIG_COMPAT +/* returns the timestamp begin of the current sub-buffer */ +#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \ + LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN +/* returns the timestamp end of the current sub-buffer */ +#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \ + LTTNG_RING_BUFFER_GET_TIMESTAMP_END +/* returns the number of events discarded */ +#define LTTNG_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \ + LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED +/* returns the packet payload size */ +#define LTTNG_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \ + LTTNG_RING_BUFFER_GET_CONTENT_SIZE +/* returns the actual packet size */ +#define LTTNG_RING_BUFFER_COMPAT_GET_PACKET_SIZE \ + LTTNG_RING_BUFFER_GET_PACKET_SIZE +/* returns the stream id */ +#define LTTNG_RING_BUFFER_COMPAT_GET_STREAM_ID \ + LTTNG_RING_BUFFER_GET_STREAM_ID +/* returns the current timestamp */ +#define LTTNG_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \ + LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP +#endif /* CONFIG_COMPAT */ #endif /* _LTTNG_ABI_H */