X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lttng-abi.h;h=db66bf375b74663e30f1b91809746a0bc76147b2;hb=c08fa736f5e9d57bf93d217fa69745cb7e98a2d5;hp=cf72b12b524bdabcaff018079e730fc8e902c6ac;hpb=975da2c003441a8a16a36947e9500237c197e91b;p=lttng-modules.git diff --git a/lttng-abi.h b/lttng-abi.h index cf72b12b..db66bf37 100644 --- a/lttng-abi.h +++ b/lttng-abi.h @@ -1,30 +1,24 @@ -#ifndef _LTTNG_ABI_H -#define _LTTNG_ABI_H - -/* +/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1) + * * lttng-abi.h * * LTTng ABI header * * Copyright (C) 2010-2012 Mathieu Desnoyers - * - * 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 */ +#ifndef _LTTNG_ABI_H +#define _LTTNG_ABI_H + #include +/* + * Major/minor version of ABI exposed to lttng tools. Major number + * should be increased when an incompatible ABI change is done. + */ +#define LTTNG_MODULES_ABI_MAJOR_VERSION 2 +#define LTTNG_MODULES_ABI_MINOR_VERSION 3 + #define LTTNG_KERNEL_SYM_NAME_LEN 256 enum lttng_kernel_instrumentation { @@ -34,6 +28,7 @@ enum lttng_kernel_instrumentation { LTTNG_KERNEL_KRETPROBE = 3, LTTNG_KERNEL_NOOP = 4, /* not hooked */ LTTNG_KERNEL_SYSCALL = 5, + LTTNG_KERNEL_UPROBE = 6, }; /* @@ -49,21 +44,21 @@ enum lttng_kernel_output { */ #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_KERNEL_SYM_NAME_LEN]; -}; +} __attribute__((packed)); /* * Either addr is used, or symbol_name and offset. @@ -73,14 +68,28 @@ struct lttng_kernel_kprobe { uint64_t offset; char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN]; -}; +} __attribute__((packed)); struct lttng_kernel_function_tracer { char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN]; -}; +} __attribute__((packed)); + +struct lttng_kernel_uprobe { + int fd; +} __attribute__((packed)); + +struct lttng_kernel_event_callsite_uprobe { + uint64_t offset; +} __attribute__((packed)); + +struct lttng_kernel_event_callsite { + union { + struct lttng_kernel_event_callsite_uprobe uprobe; + } u; +} __attribute__((packed)); /* - * For syscall tracing, name = '\0' means "enable all". + * For syscall tracing, name = "*" means "enable all". */ #define LTTNG_KERNEL_EVENT_PADDING1 16 #define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32 @@ -94,15 +103,21 @@ struct lttng_kernel_event { struct lttng_kernel_kretprobe kretprobe; struct lttng_kernel_kprobe kprobe; struct lttng_kernel_function_tracer ftrace; + struct lttng_kernel_uprobe uprobe; char padding[LTTNG_KERNEL_EVENT_PADDING2]; } u; -}; +} __attribute__((packed)); struct lttng_kernel_tracer_version { uint32_t major; uint32_t minor; uint32_t patchlevel; -}; +} __attribute__((packed)); + +struct lttng_kernel_tracer_abi_version { + uint32_t major; + uint32_t minor; +} __attribute__((packed)); enum lttng_kernel_calibrate_type { LTTNG_KERNEL_CALIBRATE_KRETPROBE, @@ -110,7 +125,12 @@ enum lttng_kernel_calibrate_type { struct lttng_kernel_calibrate { enum lttng_kernel_calibrate_type type; /* type (input) */ -}; +} __attribute__((packed)); + +struct lttng_kernel_syscall_mask { + uint32_t len; /* in bits */ + char mask[]; +} __attribute__((packed)); enum lttng_kernel_context_type { LTTNG_KERNEL_CONTEXT_PID = 0, @@ -124,13 +144,20 @@ enum lttng_kernel_context_type { LTTNG_KERNEL_CONTEXT_PPID = 8, LTTNG_KERNEL_CONTEXT_VPPID = 9, LTTNG_KERNEL_CONTEXT_HOSTNAME = 10, + LTTNG_KERNEL_CONTEXT_CPU_ID = 11, + LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12, + LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13, + LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14, + LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15, + LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16, + LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17, }; struct lttng_kernel_perf_counter_ctx { uint32_t type; uint64_t config; 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 @@ -142,36 +169,116 @@ struct lttng_kernel_context { struct lttng_kernel_perf_counter_ctx perf_counter; char padding[LTTNG_KERNEL_CONTEXT_PADDING2]; } u; -}; +} __attribute__((packed)); + +#define LTTNG_KERNEL_FILTER_BYTECODE_MAX_LEN 65536 +struct lttng_kernel_filter_bytecode { + uint32_t len; + uint32_t reloc_offset; + uint64_t seqnum; + char data[0]; +} __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) +#define LTTNG_KERNEL_SYSCALL_LIST _IO(0xF6, 0x4A) +#define LTTNG_KERNEL_TRACER_ABI_VERSION \ + _IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version) /* 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) +#define LTTNG_KERNEL_SESSION_TRACK_PID \ + _IOR(0xF6, 0x58, int32_t) +#define LTTNG_KERNEL_SESSION_UNTRACK_PID \ + _IOR(0xF6, 0x59, int32_t) +/* + * ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO + * are generating two different ioctl numbers, but this was not done on + * purpose. We should generally try to avoid those duplications. + */ +#define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS _IO(0xF6, 0x58) +#define LTTNG_KERNEL_SESSION_METADATA_REGEN _IO(0xF6, 0x59) +/* 0x5A and 0x5B are reserved for a future ABI-breaking cleanup. */ +#define LTTNG_KERNEL_SESSION_STATEDUMP _IO(0xF6, 0x5C) /* 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) +#define LTTNG_KERNEL_SYSCALL_MASK \ + _IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask) /* 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) + +/* Event FD ioctl */ +#define LTTNG_KERNEL_FILTER _IO(0xF6, 0x90) +#define LTTNG_KERNEL_ADD_CALLSITE _IO(0xF6, 0x91) + +/* 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) +/* returns the packet sequence number */ +#define LTTNG_RING_BUFFER_GET_SEQ_NUM _IOR(0xF6, 0x27, uint64_t) +/* returns the stream instance id */ +#define LTTNG_RING_BUFFER_INSTANCE_ID _IOR(0xF6, 0x28, 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 +/* returns the packet sequence number */ +#define LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM \ + LTTNG_RING_BUFFER_GET_SEQ_NUM +/* returns the stream instance id */ +#define LTTNG_RING_BUFFER_COMPAT_INSTANCE_ID \ + LTTNG_RING_BUFFER_INSTANCE_ID +#endif /* CONFIG_COMPAT */ #endif /* _LTTNG_ABI_H */