From: Simon Marchi Date: Fri, 3 Sep 2021 21:31:29 +0000 (-0400) Subject: common: compile libkernel-ctl as C++ X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=aff3dd5c0a0de4be28db5ac7d1f8b03d5c867497;p=lttng-tools.git common: compile libkernel-ctl as C++ Change-Id: If0c92341d8efea2d093d404d25399bd8d75fc059 Signed-off-by: Simon Marchi Signed-off-by: Jérémie Galarneau --- diff --git a/src/common/kernel-ctl/Makefile.am b/src/common/kernel-ctl/Makefile.am index 904a566ae..976cfdbc8 100644 --- a/src/common/kernel-ctl/Makefile.am +++ b/src/common/kernel-ctl/Makefile.am @@ -2,4 +2,7 @@ noinst_LTLIBRARIES = libkernel-ctl.la -libkernel_ctl_la_SOURCES = kernel-ctl.c kernel-ctl.h kernel-ioctl.h +libkernel_ctl_la_SOURCES = \ + kernel-ctl.cpp \ + kernel-ctl.h \ + kernel-ioctl.h diff --git a/src/common/kernel-ctl/kernel-ctl.c b/src/common/kernel-ctl/kernel-ctl.c deleted file mode 100644 index c535054cc..000000000 --- a/src/common/kernel-ctl/kernel-ctl.c +++ /dev/null @@ -1,812 +0,0 @@ -/* - * Copyright (C) 2011 Julien Desfossez - * Copyright (C) 2011 Mathieu Desnoyers - * Copyright (C) 2016 Jérémie Galarneau - * - * SPDX-License-Identifier: GPL-2.0-only - * - */ - -#include "lttng/tracker.h" -#define _LGPL_SOURCE -#define __USE_LINUX_IOCTL_DEFS -#include -#include -#include -#include -#include -#include -#include - -#include "kernel-ctl.h" -#include "kernel-ioctl.h" - -#define LTTNG_IOCTL_CHECK(fildes, request, ...) \ - ({ \ - int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ - LTTNG_ASSERT(_ioctl_ret <= 0); \ - !_ioctl_ret ? 0 : -errno; \ - }) - -#define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) \ - ({ \ - int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ - _ioctl_ret >= 0 ? _ioctl_ret : -errno; \ - }) - -/* - * This flag indicates which version of the kernel ABI to use. The old - * ABI (namespace _old) does not support a 32-bit user-space when the - * kernel is 64-bit. The old ABI is kept here for compatibility but is - * deprecated and will be removed eventually. - */ -static int lttng_kernel_abi_use_old_abi = -1; - -/* - * Execute the new or old ioctl depending on the ABI version. - * If the ABI version is not determined yet (lttng_kernel_abi_use_old_abi = -1), - * this function tests if the new ABI is available and otherwise fallbacks - * on the old one. - * This function takes the fd on which the ioctl must be executed and the old - * and new request codes. - * It returns the return value of the ioctl executed. - */ -static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, - unsigned long newname) -{ - int ret; - - if (lttng_kernel_abi_use_old_abi == -1) { - ret = LTTNG_IOCTL_NO_CHECK(fd, newname); - if (!ret) { - lttng_kernel_abi_use_old_abi = 0; - goto end; - } - lttng_kernel_abi_use_old_abi = 1; - } - if (lttng_kernel_abi_use_old_abi) { - ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); - } else { - ret = LTTNG_IOCTL_NO_CHECK(fd, newname); - } - -end: - return ret; -} - -int kernctl_create_session(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION, - LTTNG_KERNEL_ABI_SESSION); -} - -/* open the metadata global channel */ -int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) -{ - struct lttng_kernel_abi_channel channel; - - if (lttng_kernel_abi_use_old_abi) { - struct lttng_kernel_abi_old_channel old_channel; - - memset(&old_channel, 0, sizeof(old_channel)); - old_channel.overwrite = chops->overwrite; - old_channel.subbuf_size = chops->subbuf_size; - old_channel.num_subbuf = chops->num_subbuf; - old_channel.switch_timer_interval = chops->switch_timer_interval; - old_channel.read_timer_interval = chops->read_timer_interval; - old_channel.output = chops->output; - - memset(old_channel.padding, 0, sizeof(old_channel.padding)); - /* - * The new channel padding is smaller than the old ABI so we use the - * new ABI padding size for the memcpy. - */ - memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); - - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_METADATA, - &old_channel); - } - - memset(&channel, 0, sizeof(channel)); - channel.overwrite = chops->overwrite; - channel.subbuf_size = chops->subbuf_size; - channel.num_subbuf = chops->num_subbuf; - channel.switch_timer_interval = chops->switch_timer_interval; - channel.read_timer_interval = chops->read_timer_interval; - channel.output = chops->output; - memcpy(channel.padding, chops->padding, sizeof(chops->padding)); - - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_METADATA, &channel); -} - -int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) -{ - struct lttng_kernel_abi_channel channel; - - memset(&channel, 0, sizeof(channel)); - if (lttng_kernel_abi_use_old_abi) { - struct lttng_kernel_abi_old_channel old_channel; - - old_channel.overwrite = chops->overwrite; - old_channel.subbuf_size = chops->subbuf_size; - old_channel.num_subbuf = chops->num_subbuf; - old_channel.switch_timer_interval = chops->switch_timer_interval; - old_channel.read_timer_interval = chops->read_timer_interval; - old_channel.output = chops->output; - - memset(old_channel.padding, 0, sizeof(old_channel.padding)); - /* - * The new channel padding is smaller than the old ABI so we use the - * new ABI padding size for the memcpy. - */ - memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); - - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_CHANNEL, - &old_channel); - } - - channel.overwrite = chops->overwrite; - channel.subbuf_size = chops->subbuf_size; - channel.num_subbuf = chops->num_subbuf; - channel.switch_timer_interval = chops->switch_timer_interval; - channel.read_timer_interval = chops->read_timer_interval; - channel.output = chops->output; - memcpy(channel.padding, chops->padding, sizeof(chops->padding)); - - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_CHANNEL, &channel); -} - -int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) -{ - struct lttng_kernel_abi_syscall_mask kmask_len, *kmask = NULL; - size_t array_alloc_len; - char *new_mask; - int ret = 0; - - if (!syscall_mask) { - ret = -1; - goto end; - } - - if (!nr_bits) { - ret = -1; - goto end; - } - - kmask_len.len = 0; - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_MASK, &kmask_len); - if (ret) { - goto end; - } - - array_alloc_len = lttng_align_ceil(kmask_len.len, 8) >> 3; - - kmask = zmalloc(sizeof(*kmask) + array_alloc_len); - if (!kmask) { - ret = -1; - goto end; - } - - kmask->len = kmask_len.len; - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_MASK, kmask); - if (ret) { - goto end; - } - - new_mask = realloc(*syscall_mask, array_alloc_len); - if (!new_mask) { - ret = -1; - goto end; - } - memcpy(new_mask, kmask->mask, array_alloc_len); - *syscall_mask = new_mask; - *nr_bits = kmask->len; - -end: - free(kmask); - return ret; -} - -int kernctl_track_pid(int fd, int pid) -{ - int ret = LTTNG_IOCTL_CHECK( - fd, LTTNG_KERNEL_ABI_SESSION_TRACK_PID, pid); - - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_PID, pid); - } - - return ret; -} - -int kernctl_untrack_pid(int fd, int pid) -{ - int ret = LTTNG_IOCTL_CHECK( - fd, LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID, pid); - - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_PID, pid); - } - - return ret; -} - -int kernctl_list_tracker_pids(int fd) -{ - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_PIDS); -} - -static enum lttng_kernel_abi_tracker_type get_kernel_tracker_type( - enum lttng_process_attr process_attr) -{ - switch (process_attr) { - case LTTNG_PROCESS_ATTR_PROCESS_ID: - return LTTNG_KERNEL_ABI_TRACKER_PID; - case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: - return LTTNG_KERNEL_ABI_TRACKER_VPID; - case LTTNG_PROCESS_ATTR_USER_ID: - return LTTNG_KERNEL_ABI_TRACKER_UID; - case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: - return LTTNG_KERNEL_ABI_TRACKER_VUID; - case LTTNG_PROCESS_ATTR_GROUP_ID: - return LTTNG_KERNEL_ABI_TRACKER_GID; - case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: - return LTTNG_KERNEL_ABI_TRACKER_VGID; - default: - return LTTNG_KERNEL_ABI_TRACKER_UNKNOWN; - } -} - -int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id) -{ - struct lttng_kernel_abi_tracker_args args; - int ret; - - args.id = id; - args.type = get_kernel_tracker_type(process_attr); - if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { - errno = EINVAL; - return -1; - } - - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_TRACK_ID, &args); - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_ID, &args); - } - - return ret; -} - -int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id) -{ - struct lttng_kernel_abi_tracker_args args; - int ret; - - args.id = id; - args.type = get_kernel_tracker_type(process_attr); - if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { - errno = EINVAL; - return -1; - } - - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID, &args); - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_ID, &args); - } - - return ret; -} - -int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr) -{ - struct lttng_kernel_abi_tracker_args args; - int ret; - - args.id = -1; - args.type = get_kernel_tracker_type(process_attr); - if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { - errno = EINVAL; - return -1; - } - - ret = LTTNG_IOCTL_NO_CHECK( - fd, LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_IDS, &args); - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_NO_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_LIST_TRACKER_IDS, - &args); - } - - return ret; -} - -int kernctl_session_regenerate_metadata(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_METADATA_REGEN); -} - -int kernctl_session_regenerate_statedump(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_STATEDUMP); -} - -int kernctl_session_set_name(int fd, const char *name) -{ - int ret; - struct lttng_kernel_abi_session_name session_name; - - ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); - if (ret) { - goto end; - } - - ret = LTTNG_IOCTL_CHECK( - fd, LTTNG_KERNEL_ABI_SESSION_SET_NAME, &session_name); - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_SET_NAME, - &session_name); - } - -end: - return ret; -} - -int kernctl_session_set_creation_time(int fd, time_t time) -{ - int ret; - struct lttng_kernel_abi_session_creation_time creation_time; - - ret = time_to_iso8601_str(time, creation_time.iso8601, - sizeof(creation_time.iso8601)); - if (ret) { - goto end; - } - - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_SET_CREATION_TIME, - &creation_time); - if (ret == -ENOSYS) { - ret = LTTNG_IOCTL_CHECK(fd, - LTTNG_KERNEL_ABI_OLD_SESSION_SET_CREATION_TIME, - &creation_time); - } - -end: - return ret; -} - -int kernctl_create_stream(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_STREAM, - LTTNG_KERNEL_ABI_STREAM); -} - -int kernctl_create_event(int fd, struct lttng_kernel_abi_event *ev) -{ - if (lttng_kernel_abi_use_old_abi) { - struct lttng_kernel_abi_old_event old_event; - - memset(&old_event, 0, sizeof(old_event)); - memcpy(old_event.name, ev->name, sizeof(old_event.name)); - old_event.instrumentation = ev->instrumentation; - switch (ev->instrumentation) { - case LTTNG_KERNEL_ABI_KPROBE: - old_event.u.kprobe.addr = ev->u.kprobe.addr; - old_event.u.kprobe.offset = ev->u.kprobe.offset; - memcpy(old_event.u.kprobe.symbol_name, - ev->u.kprobe.symbol_name, - sizeof(old_event.u.kprobe.symbol_name)); - break; - case LTTNG_KERNEL_ABI_KRETPROBE: - old_event.u.kretprobe.addr = ev->u.kretprobe.addr; - old_event.u.kretprobe.offset = ev->u.kretprobe.offset; - memcpy(old_event.u.kretprobe.symbol_name, - ev->u.kretprobe.symbol_name, - sizeof(old_event.u.kretprobe.symbol_name)); - break; - case LTTNG_KERNEL_ABI_FUNCTION: - memcpy(old_event.u.ftrace.symbol_name, - ev->u.ftrace.symbol_name, - sizeof(old_event.u.ftrace.symbol_name)); - break; - default: - break; - } - - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_EVENT, - &old_event); - } - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_EVENT, ev); -} - -int kernctl_add_context(int fd, struct lttng_kernel_abi_context *ctx) -{ - if (lttng_kernel_abi_use_old_abi) { - struct lttng_kernel_abi_old_context old_ctx; - - memset(&old_ctx, 0, sizeof(old_ctx)); - old_ctx.ctx = ctx->ctx; - /* only type that uses the union */ - if (ctx->ctx == LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER) { - old_ctx.u.perf_counter.type = - ctx->u.perf_counter.type; - old_ctx.u.perf_counter.config = - ctx->u.perf_counter.config; - memcpy(old_ctx.u.perf_counter.name, - ctx->u.perf_counter.name, - sizeof(old_ctx.u.perf_counter.name)); - } - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_OLD_CONTEXT, - &old_ctx); - } - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_CONTEXT, ctx); -} - - -/* Enable event, channel and session LTTNG_IOCTL_CHECK */ -int kernctl_enable(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_ENABLE, - LTTNG_KERNEL_ABI_ENABLE); -} - -/* Disable event, channel and session LTTNG_IOCTL_CHECK */ -int kernctl_disable(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_DISABLE, - LTTNG_KERNEL_ABI_DISABLE); -} - -int kernctl_start_session(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION_START, - LTTNG_KERNEL_ABI_SESSION_START); -} - -int kernctl_stop_session(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION_STOP, - LTTNG_KERNEL_ABI_SESSION_STOP); -} - -int kernctl_create_event_notifier_group(int fd) -{ - return LTTNG_IOCTL_NO_CHECK(fd, - LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_CREATE); -} - -int kernctl_create_event_notifier_group_notification_fd(int group_fd) -{ - return LTTNG_IOCTL_NO_CHECK(group_fd, - LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD); -} - -int kernctl_create_event_notifier_group_error_counter(int group_fd, - const struct lttng_kernel_abi_counter_conf *error_counter_conf) -{ - return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_ABI_COUNTER, - error_counter_conf); -} - -int kernctl_counter_get_aggregate_value(int counter_fd, - struct lttng_kernel_abi_counter_aggregate *value) -{ - return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_ABI_COUNTER_AGGREGATE, - value); -} - -int kernctl_counter_clear(int counter_fd, - struct lttng_kernel_abi_counter_clear *clear) -{ - return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_ABI_COUNTER_CLEAR, - clear); -} - -int kernctl_create_event_notifier(int group_fd, - const struct lttng_kernel_abi_event_notifier *event_notifier) -{ - return LTTNG_IOCTL_NO_CHECK(group_fd, - LTTNG_KERNEL_ABI_EVENT_NOTIFIER_CREATE, event_notifier); -} - -int kernctl_capture(int fd, const struct lttng_bytecode *capture) -{ - int ret; - struct lttng_kernel_abi_capture_bytecode *kb; - - /* Translate bytecode to kernel bytecode. */ - kb = zmalloc(sizeof(*kb) + capture->len); - if (!kb) { - ret = -ENOMEM; - goto end; - } - - kb->len = capture->len; - kb->reloc_offset = capture->reloc_table_offset; - kb->seqnum = capture->seqnum; - memcpy(kb->data, capture->data, capture->len); - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_CAPTURE, kb); - free(kb); -end: - return ret; -} - -int kernctl_filter(int fd, const struct lttng_bytecode *filter) -{ - struct lttng_kernel_abi_filter_bytecode *kb; - uint32_t len; - int ret; - - /* Translate bytecode to kernel bytecode */ - kb = zmalloc(sizeof(*kb) + filter->len); - if (!kb) - return -ENOMEM; - kb->len = len = filter->len; - kb->reloc_offset = filter->reloc_table_offset; - kb->seqnum = filter->seqnum; - memcpy(kb->data, filter->data, len); - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_FILTER, kb); - free(kb); - return ret; -} - -int kernctl_add_callsite(int fd, struct lttng_kernel_abi_event_callsite *callsite) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_ADD_CALLSITE, callsite); -} - -int kernctl_tracepoint_list(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_TRACEPOINT_LIST, - LTTNG_KERNEL_ABI_TRACEPOINT_LIST); -} - -int kernctl_syscall_list(int fd) -{ - return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_LIST); -} - -int kernctl_tracer_version(int fd, struct lttng_kernel_abi_tracer_version *v) -{ - int ret; - - if (lttng_kernel_abi_use_old_abi == -1) { - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_VERSION, v); - if (!ret) { - lttng_kernel_abi_use_old_abi = 0; - goto end; - } - lttng_kernel_abi_use_old_abi = 1; - } - if (lttng_kernel_abi_use_old_abi) { - struct lttng_kernel_abi_old_tracer_version old_v; - - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_OLD_TRACER_VERSION, &old_v); - if (ret) { - goto end; - } - v->major = old_v.major; - v->minor = old_v.minor; - v->patchlevel = old_v.patchlevel; - } else { - ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_VERSION, v); - } - -end: - return ret; -} - -int kernctl_tracer_abi_version(int fd, - struct lttng_kernel_abi_tracer_abi_version *v) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_ABI_VERSION, v); -} - -int kernctl_wait_quiescent(int fd) -{ - return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_WAIT_QUIESCENT, - LTTNG_KERNEL_ABI_WAIT_QUIESCENT); -} - -int kernctl_buffer_flush(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH); -} - -int kernctl_buffer_flush_empty(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH_EMPTY); -} - -int kernctl_buffer_clear(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_CLEAR); -} - -int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent) -{ - return LTTNG_IOCTL_NO_CHECK(fd, - LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK, - consistent); -} - -/* returns the version of the metadata. */ -int kernctl_get_metadata_version(int fd, uint64_t *version) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_METADATA_VERSION, - version); -} - -int kernctl_metadata_cache_dump(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_METADATA_CACHE_DUMP); -} - -/* Buffer operations */ - -/* For mmap mode, readable without "get" operation */ - -/* returns the length to mmap. */ -int kernctl_get_mmap_len(int fd, unsigned long *len) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MMAP_LEN, - len); -} - -/* returns the maximum size for sub-buffers. */ -int kernctl_get_max_subbuf_size(int fd, unsigned long *len) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MAX_SUBBUF_SIZE, - len); -} - -/* - * For mmap mode, operate on the current packet (between get/put or - * get_next/put_next). - */ - -/* returns the offset of the subbuffer belonging to the mmap reader. */ -int kernctl_get_mmap_read_offset(int fd, unsigned long *off) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MMAP_READ_OFFSET, - off); -} - -/* returns the size of the current sub-buffer, without padding (for mmap). */ -int kernctl_get_subbuf_size(int fd, unsigned long *len) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF_SIZE, - len); -} - -/* returns the size of the current sub-buffer, without padding (for mmap). */ -int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_PADDED_SUBBUF_SIZE, - len); -} - -/* Get exclusive read access to the next sub-buffer that can be read. */ -int kernctl_get_next_subbuf(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF); -} - - -/* Release exclusive sub-buffer access, move consumer forward. */ -int kernctl_put_next_subbuf(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_PUT_NEXT_SUBBUF); -} - -/* snapshot */ - -/* Get a snapshot of the current ring buffer producer and consumer positions */ -int kernctl_snapshot(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT); -} - -/* - * Get a snapshot of the current ring buffer producer and consumer positions, - * regardless of whether or not the two positions are contained within the - * same sub-buffer. - */ -int kernctl_snapshot_sample_positions(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); -} - -/* Get the consumer position (iteration start) */ -int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_GET_CONSUMED, - pos); -} - -/* Get the producer position (iteration end) */ -int kernctl_snapshot_get_produced(int fd, unsigned long *pos) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_GET_PRODUCED, - pos); -} - -/* Get exclusive read access to the specified sub-buffer position */ -int kernctl_get_subbuf(int fd, unsigned long *len) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF, - len); -} - -/* Release exclusive sub-buffer access */ -int kernctl_put_subbuf(int fd) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_PUT_SUBBUF); -} - -/* Returns the timestamp begin of the current sub-buffer. */ -int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_BEGIN, - timestamp_begin); -} - -/* Returns the timestamp end of the current sub-buffer. */ -int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_END, - timestamp_end); -} - -/* Returns the number of discarded events in the current sub-buffer. */ -int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_EVENTS_DISCARDED, - events_discarded); -} - -/* Returns the content size in the current sub-buffer. */ -int kernctl_get_content_size(int fd, uint64_t *content_size) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_CONTENT_SIZE, - content_size); -} - -/* Returns the packet size in the current sub-buffer. */ -int kernctl_get_packet_size(int fd, uint64_t *packet_size) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_PACKET_SIZE, - packet_size); -} - -/* Returns the stream id of the current sub-buffer. */ -int kernctl_get_stream_id(int fd, uint64_t *stream_id) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_STREAM_ID, - stream_id); -} - -/* Returns the current timestamp. */ -int kernctl_get_current_timestamp(int fd, uint64_t *ts) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP, - ts); -} - -/* Returns the packet sequence number of the current sub-buffer. */ -int kernctl_get_sequence_number(int fd, uint64_t *seq) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SEQ_NUM, - seq); -} - -/* Returns the stream instance id. */ -int kernctl_get_instance_id(int fd, uint64_t *id) -{ - return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_INSTANCE_ID, - id); -} diff --git a/src/common/kernel-ctl/kernel-ctl.cpp b/src/common/kernel-ctl/kernel-ctl.cpp new file mode 100644 index 000000000..4d59bdf29 --- /dev/null +++ b/src/common/kernel-ctl/kernel-ctl.cpp @@ -0,0 +1,812 @@ +/* + * Copyright (C) 2011 Julien Desfossez + * Copyright (C) 2011 Mathieu Desnoyers + * Copyright (C) 2016 Jérémie Galarneau + * + * SPDX-License-Identifier: GPL-2.0-only + * + */ + +#include "lttng/tracker.h" +#define _LGPL_SOURCE +#define __USE_LINUX_IOCTL_DEFS +#include +#include +#include +#include +#include +#include +#include + +#include "kernel-ctl.h" +#include "kernel-ioctl.h" + +#define LTTNG_IOCTL_CHECK(fildes, request, ...) \ + ({ \ + int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ + LTTNG_ASSERT(_ioctl_ret <= 0); \ + !_ioctl_ret ? 0 : -errno; \ + }) + +#define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) \ + ({ \ + int _ioctl_ret = ioctl(fildes, request, ##__VA_ARGS__); \ + _ioctl_ret >= 0 ? _ioctl_ret : -errno; \ + }) + +/* + * This flag indicates which version of the kernel ABI to use. The old + * ABI (namespace _old) does not support a 32-bit user-space when the + * kernel is 64-bit. The old ABI is kept here for compatibility but is + * deprecated and will be removed eventually. + */ +static int lttng_kernel_abi_use_old_abi = -1; + +/* + * Execute the new or old ioctl depending on the ABI version. + * If the ABI version is not determined yet (lttng_kernel_abi_use_old_abi = -1), + * this function tests if the new ABI is available and otherwise fallbacks + * on the old one. + * This function takes the fd on which the ioctl must be executed and the old + * and new request codes. + * It returns the return value of the ioctl executed. + */ +static inline int compat_ioctl_no_arg(int fd, unsigned long oldname, + unsigned long newname) +{ + int ret; + + if (lttng_kernel_abi_use_old_abi == -1) { + ret = LTTNG_IOCTL_NO_CHECK(fd, newname); + if (!ret) { + lttng_kernel_abi_use_old_abi = 0; + goto end; + } + lttng_kernel_abi_use_old_abi = 1; + } + if (lttng_kernel_abi_use_old_abi) { + ret = LTTNG_IOCTL_NO_CHECK(fd, oldname); + } else { + ret = LTTNG_IOCTL_NO_CHECK(fd, newname); + } + +end: + return ret; +} + +int kernctl_create_session(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION, + LTTNG_KERNEL_ABI_SESSION); +} + +/* open the metadata global channel */ +int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops) +{ + struct lttng_kernel_abi_channel channel; + + if (lttng_kernel_abi_use_old_abi) { + struct lttng_kernel_abi_old_channel old_channel; + + memset(&old_channel, 0, sizeof(old_channel)); + old_channel.overwrite = chops->overwrite; + old_channel.subbuf_size = chops->subbuf_size; + old_channel.num_subbuf = chops->num_subbuf; + old_channel.switch_timer_interval = chops->switch_timer_interval; + old_channel.read_timer_interval = chops->read_timer_interval; + old_channel.output = chops->output; + + memset(old_channel.padding, 0, sizeof(old_channel.padding)); + /* + * The new channel padding is smaller than the old ABI so we use the + * new ABI padding size for the memcpy. + */ + memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); + + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_METADATA, + &old_channel); + } + + memset(&channel, 0, sizeof(channel)); + channel.overwrite = chops->overwrite; + channel.subbuf_size = chops->subbuf_size; + channel.num_subbuf = chops->num_subbuf; + channel.switch_timer_interval = chops->switch_timer_interval; + channel.read_timer_interval = chops->read_timer_interval; + channel.output = chops->output; + memcpy(channel.padding, chops->padding, sizeof(chops->padding)); + + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_METADATA, &channel); +} + +int kernctl_create_channel(int fd, struct lttng_channel_attr *chops) +{ + struct lttng_kernel_abi_channel channel; + + memset(&channel, 0, sizeof(channel)); + if (lttng_kernel_abi_use_old_abi) { + struct lttng_kernel_abi_old_channel old_channel; + + old_channel.overwrite = chops->overwrite; + old_channel.subbuf_size = chops->subbuf_size; + old_channel.num_subbuf = chops->num_subbuf; + old_channel.switch_timer_interval = chops->switch_timer_interval; + old_channel.read_timer_interval = chops->read_timer_interval; + old_channel.output = chops->output; + + memset(old_channel.padding, 0, sizeof(old_channel.padding)); + /* + * The new channel padding is smaller than the old ABI so we use the + * new ABI padding size for the memcpy. + */ + memcpy(old_channel.padding, chops->padding, sizeof(chops->padding)); + + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_CHANNEL, + &old_channel); + } + + channel.overwrite = chops->overwrite; + channel.subbuf_size = chops->subbuf_size; + channel.num_subbuf = chops->num_subbuf; + channel.switch_timer_interval = chops->switch_timer_interval; + channel.read_timer_interval = chops->read_timer_interval; + channel.output = chops->output; + memcpy(channel.padding, chops->padding, sizeof(chops->padding)); + + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_CHANNEL, &channel); +} + +int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits) +{ + struct lttng_kernel_abi_syscall_mask kmask_len, *kmask = NULL; + size_t array_alloc_len; + char *new_mask; + int ret = 0; + + if (!syscall_mask) { + ret = -1; + goto end; + } + + if (!nr_bits) { + ret = -1; + goto end; + } + + kmask_len.len = 0; + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_MASK, &kmask_len); + if (ret) { + goto end; + } + + array_alloc_len = lttng_align_ceil(kmask_len.len, 8) >> 3; + + kmask = (lttng_kernel_abi_syscall_mask *) zmalloc(sizeof(*kmask) + array_alloc_len); + if (!kmask) { + ret = -1; + goto end; + } + + kmask->len = kmask_len.len; + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_MASK, kmask); + if (ret) { + goto end; + } + + new_mask = (char *) realloc(*syscall_mask, array_alloc_len); + if (!new_mask) { + ret = -1; + goto end; + } + memcpy(new_mask, kmask->mask, array_alloc_len); + *syscall_mask = new_mask; + *nr_bits = kmask->len; + +end: + free(kmask); + return ret; +} + +int kernctl_track_pid(int fd, int pid) +{ + int ret = LTTNG_IOCTL_CHECK( + fd, LTTNG_KERNEL_ABI_SESSION_TRACK_PID, pid); + + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_PID, pid); + } + + return ret; +} + +int kernctl_untrack_pid(int fd, int pid) +{ + int ret = LTTNG_IOCTL_CHECK( + fd, LTTNG_KERNEL_ABI_SESSION_UNTRACK_PID, pid); + + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_PID, pid); + } + + return ret; +} + +int kernctl_list_tracker_pids(int fd) +{ + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_PIDS); +} + +static enum lttng_kernel_abi_tracker_type get_kernel_tracker_type( + enum lttng_process_attr process_attr) +{ + switch (process_attr) { + case LTTNG_PROCESS_ATTR_PROCESS_ID: + return LTTNG_KERNEL_ABI_TRACKER_PID; + case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: + return LTTNG_KERNEL_ABI_TRACKER_VPID; + case LTTNG_PROCESS_ATTR_USER_ID: + return LTTNG_KERNEL_ABI_TRACKER_UID; + case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: + return LTTNG_KERNEL_ABI_TRACKER_VUID; + case LTTNG_PROCESS_ATTR_GROUP_ID: + return LTTNG_KERNEL_ABI_TRACKER_GID; + case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: + return LTTNG_KERNEL_ABI_TRACKER_VGID; + default: + return LTTNG_KERNEL_ABI_TRACKER_UNKNOWN; + } +} + +int kernctl_track_id(int fd, enum lttng_process_attr process_attr, int id) +{ + struct lttng_kernel_abi_tracker_args args; + int ret; + + args.id = id; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_TRACK_ID, &args); + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_TRACK_ID, &args); + } + + return ret; +} + +int kernctl_untrack_id(int fd, enum lttng_process_attr process_attr, int id) +{ + struct lttng_kernel_abi_tracker_args args; + int ret; + + args.id = id; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_UNTRACK_ID, &args); + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_UNTRACK_ID, &args); + } + + return ret; +} + +int kernctl_list_tracker_ids(int fd, enum lttng_process_attr process_attr) +{ + struct lttng_kernel_abi_tracker_args args; + int ret; + + args.id = -1; + args.type = get_kernel_tracker_type(process_attr); + if (args.type == LTTNG_KERNEL_ABI_TRACKER_UNKNOWN) { + errno = EINVAL; + return -1; + } + + ret = LTTNG_IOCTL_NO_CHECK( + fd, LTTNG_KERNEL_ABI_SESSION_LIST_TRACKER_IDS, &args); + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_NO_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_LIST_TRACKER_IDS, + &args); + } + + return ret; +} + +int kernctl_session_regenerate_metadata(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_METADATA_REGEN); +} + +int kernctl_session_regenerate_statedump(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_STATEDUMP); +} + +int kernctl_session_set_name(int fd, const char *name) +{ + int ret; + struct lttng_kernel_abi_session_name session_name; + + ret = lttng_strncpy(session_name.name, name, sizeof(session_name.name)); + if (ret) { + goto end; + } + + ret = LTTNG_IOCTL_CHECK( + fd, LTTNG_KERNEL_ABI_SESSION_SET_NAME, &session_name); + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_SET_NAME, + &session_name); + } + +end: + return ret; +} + +int kernctl_session_set_creation_time(int fd, time_t time) +{ + int ret; + struct lttng_kernel_abi_session_creation_time creation_time; + + ret = time_to_iso8601_str(time, creation_time.iso8601, + sizeof(creation_time.iso8601)); + if (ret) { + goto end; + } + + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_SESSION_SET_CREATION_TIME, + &creation_time); + if (ret == -ENOSYS) { + ret = LTTNG_IOCTL_CHECK(fd, + LTTNG_KERNEL_ABI_OLD_SESSION_SET_CREATION_TIME, + &creation_time); + } + +end: + return ret; +} + +int kernctl_create_stream(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_STREAM, + LTTNG_KERNEL_ABI_STREAM); +} + +int kernctl_create_event(int fd, struct lttng_kernel_abi_event *ev) +{ + if (lttng_kernel_abi_use_old_abi) { + struct lttng_kernel_abi_old_event old_event; + + memset(&old_event, 0, sizeof(old_event)); + memcpy(old_event.name, ev->name, sizeof(old_event.name)); + old_event.instrumentation = ev->instrumentation; + switch (ev->instrumentation) { + case LTTNG_KERNEL_ABI_KPROBE: + old_event.u.kprobe.addr = ev->u.kprobe.addr; + old_event.u.kprobe.offset = ev->u.kprobe.offset; + memcpy(old_event.u.kprobe.symbol_name, + ev->u.kprobe.symbol_name, + sizeof(old_event.u.kprobe.symbol_name)); + break; + case LTTNG_KERNEL_ABI_KRETPROBE: + old_event.u.kretprobe.addr = ev->u.kretprobe.addr; + old_event.u.kretprobe.offset = ev->u.kretprobe.offset; + memcpy(old_event.u.kretprobe.symbol_name, + ev->u.kretprobe.symbol_name, + sizeof(old_event.u.kretprobe.symbol_name)); + break; + case LTTNG_KERNEL_ABI_FUNCTION: + memcpy(old_event.u.ftrace.symbol_name, + ev->u.ftrace.symbol_name, + sizeof(old_event.u.ftrace.symbol_name)); + break; + default: + break; + } + + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_OLD_EVENT, + &old_event); + } + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_EVENT, ev); +} + +int kernctl_add_context(int fd, struct lttng_kernel_abi_context *ctx) +{ + if (lttng_kernel_abi_use_old_abi) { + struct lttng_kernel_abi_old_context old_ctx; + + memset(&old_ctx, 0, sizeof(old_ctx)); + old_ctx.ctx = ctx->ctx; + /* only type that uses the union */ + if (ctx->ctx == LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER) { + old_ctx.u.perf_counter.type = + ctx->u.perf_counter.type; + old_ctx.u.perf_counter.config = + ctx->u.perf_counter.config; + memcpy(old_ctx.u.perf_counter.name, + ctx->u.perf_counter.name, + sizeof(old_ctx.u.perf_counter.name)); + } + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_OLD_CONTEXT, + &old_ctx); + } + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_CONTEXT, ctx); +} + + +/* Enable event, channel and session LTTNG_IOCTL_CHECK */ +int kernctl_enable(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_ENABLE, + LTTNG_KERNEL_ABI_ENABLE); +} + +/* Disable event, channel and session LTTNG_IOCTL_CHECK */ +int kernctl_disable(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_DISABLE, + LTTNG_KERNEL_ABI_DISABLE); +} + +int kernctl_start_session(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION_START, + LTTNG_KERNEL_ABI_SESSION_START); +} + +int kernctl_stop_session(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_SESSION_STOP, + LTTNG_KERNEL_ABI_SESSION_STOP); +} + +int kernctl_create_event_notifier_group(int fd) +{ + return LTTNG_IOCTL_NO_CHECK(fd, + LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_CREATE); +} + +int kernctl_create_event_notifier_group_notification_fd(int group_fd) +{ + return LTTNG_IOCTL_NO_CHECK(group_fd, + LTTNG_KERNEL_ABI_EVENT_NOTIFIER_GROUP_NOTIFICATION_FD); +} + +int kernctl_create_event_notifier_group_error_counter(int group_fd, + const struct lttng_kernel_abi_counter_conf *error_counter_conf) +{ + return LTTNG_IOCTL_NO_CHECK(group_fd, LTTNG_KERNEL_ABI_COUNTER, + error_counter_conf); +} + +int kernctl_counter_get_aggregate_value(int counter_fd, + struct lttng_kernel_abi_counter_aggregate *value) +{ + return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_ABI_COUNTER_AGGREGATE, + value); +} + +int kernctl_counter_clear(int counter_fd, + struct lttng_kernel_abi_counter_clear *clear) +{ + return LTTNG_IOCTL_NO_CHECK(counter_fd, LTTNG_KERNEL_ABI_COUNTER_CLEAR, + clear); +} + +int kernctl_create_event_notifier(int group_fd, + const struct lttng_kernel_abi_event_notifier *event_notifier) +{ + return LTTNG_IOCTL_NO_CHECK(group_fd, + LTTNG_KERNEL_ABI_EVENT_NOTIFIER_CREATE, event_notifier); +} + +int kernctl_capture(int fd, const struct lttng_bytecode *capture) +{ + int ret; + struct lttng_kernel_abi_capture_bytecode *kb; + + /* Translate bytecode to kernel bytecode. */ + kb = (lttng_kernel_abi_capture_bytecode *) zmalloc(sizeof(*kb) + capture->len); + if (!kb) { + ret = -ENOMEM; + goto end; + } + + kb->len = capture->len; + kb->reloc_offset = capture->reloc_table_offset; + kb->seqnum = capture->seqnum; + memcpy(kb->data, capture->data, capture->len); + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_CAPTURE, kb); + free(kb); +end: + return ret; +} + +int kernctl_filter(int fd, const struct lttng_bytecode *filter) +{ + struct lttng_kernel_abi_filter_bytecode *kb; + uint32_t len; + int ret; + + /* Translate bytecode to kernel bytecode */ + kb = (lttng_kernel_abi_filter_bytecode *) zmalloc(sizeof(*kb) + filter->len); + if (!kb) + return -ENOMEM; + kb->len = len = filter->len; + kb->reloc_offset = filter->reloc_table_offset; + kb->seqnum = filter->seqnum; + memcpy(kb->data, filter->data, len); + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_FILTER, kb); + free(kb); + return ret; +} + +int kernctl_add_callsite(int fd, struct lttng_kernel_abi_event_callsite *callsite) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_ADD_CALLSITE, callsite); +} + +int kernctl_tracepoint_list(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_TRACEPOINT_LIST, + LTTNG_KERNEL_ABI_TRACEPOINT_LIST); +} + +int kernctl_syscall_list(int fd) +{ + return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_ABI_SYSCALL_LIST); +} + +int kernctl_tracer_version(int fd, struct lttng_kernel_abi_tracer_version *v) +{ + int ret; + + if (lttng_kernel_abi_use_old_abi == -1) { + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_VERSION, v); + if (!ret) { + lttng_kernel_abi_use_old_abi = 0; + goto end; + } + lttng_kernel_abi_use_old_abi = 1; + } + if (lttng_kernel_abi_use_old_abi) { + struct lttng_kernel_abi_old_tracer_version old_v; + + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_OLD_TRACER_VERSION, &old_v); + if (ret) { + goto end; + } + v->major = old_v.major; + v->minor = old_v.minor; + v->patchlevel = old_v.patchlevel; + } else { + ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_VERSION, v); + } + +end: + return ret; +} + +int kernctl_tracer_abi_version(int fd, + struct lttng_kernel_abi_tracer_abi_version *v) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_TRACER_ABI_VERSION, v); +} + +int kernctl_wait_quiescent(int fd) +{ + return compat_ioctl_no_arg(fd, LTTNG_KERNEL_ABI_OLD_WAIT_QUIESCENT, + LTTNG_KERNEL_ABI_WAIT_QUIESCENT); +} + +int kernctl_buffer_flush(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH); +} + +int kernctl_buffer_flush_empty(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_FLUSH_EMPTY); +} + +int kernctl_buffer_clear(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_CLEAR); +} + +int kernctl_get_next_subbuf_metadata_check(int fd, bool *consistent) +{ + return LTTNG_IOCTL_NO_CHECK(fd, + LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF_METADATA_CHECK, + consistent); +} + +/* returns the version of the metadata. */ +int kernctl_get_metadata_version(int fd, uint64_t *version) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_METADATA_VERSION, + version); +} + +int kernctl_metadata_cache_dump(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_METADATA_CACHE_DUMP); +} + +/* Buffer operations */ + +/* For mmap mode, readable without "get" operation */ + +/* returns the length to mmap. */ +int kernctl_get_mmap_len(int fd, unsigned long *len) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MMAP_LEN, + len); +} + +/* returns the maximum size for sub-buffers. */ +int kernctl_get_max_subbuf_size(int fd, unsigned long *len) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MAX_SUBBUF_SIZE, + len); +} + +/* + * For mmap mode, operate on the current packet (between get/put or + * get_next/put_next). + */ + +/* returns the offset of the subbuffer belonging to the mmap reader. */ +int kernctl_get_mmap_read_offset(int fd, unsigned long *off) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_MMAP_READ_OFFSET, + off); +} + +/* returns the size of the current sub-buffer, without padding (for mmap). */ +int kernctl_get_subbuf_size(int fd, unsigned long *len) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF_SIZE, + len); +} + +/* returns the size of the current sub-buffer, without padding (for mmap). */ +int kernctl_get_padded_subbuf_size(int fd, unsigned long *len) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_PADDED_SUBBUF_SIZE, + len); +} + +/* Get exclusive read access to the next sub-buffer that can be read. */ +int kernctl_get_next_subbuf(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_NEXT_SUBBUF); +} + + +/* Release exclusive sub-buffer access, move consumer forward. */ +int kernctl_put_next_subbuf(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_PUT_NEXT_SUBBUF); +} + +/* snapshot */ + +/* Get a snapshot of the current ring buffer producer and consumer positions */ +int kernctl_snapshot(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT); +} + +/* + * Get a snapshot of the current ring buffer producer and consumer positions, + * regardless of whether or not the two positions are contained within the + * same sub-buffer. + */ +int kernctl_snapshot_sample_positions(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS); +} + +/* Get the consumer position (iteration start) */ +int kernctl_snapshot_get_consumed(int fd, unsigned long *pos) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_GET_CONSUMED, + pos); +} + +/* Get the producer position (iteration end) */ +int kernctl_snapshot_get_produced(int fd, unsigned long *pos) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_SNAPSHOT_GET_PRODUCED, + pos); +} + +/* Get exclusive read access to the specified sub-buffer position */ +int kernctl_get_subbuf(int fd, unsigned long *len) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SUBBUF, + len); +} + +/* Release exclusive sub-buffer access */ +int kernctl_put_subbuf(int fd) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_PUT_SUBBUF); +} + +/* Returns the timestamp begin of the current sub-buffer. */ +int kernctl_get_timestamp_begin(int fd, uint64_t *timestamp_begin) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_BEGIN, + timestamp_begin); +} + +/* Returns the timestamp end of the current sub-buffer. */ +int kernctl_get_timestamp_end(int fd, uint64_t *timestamp_end) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_TIMESTAMP_END, + timestamp_end); +} + +/* Returns the number of discarded events in the current sub-buffer. */ +int kernctl_get_events_discarded(int fd, uint64_t *events_discarded) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_EVENTS_DISCARDED, + events_discarded); +} + +/* Returns the content size in the current sub-buffer. */ +int kernctl_get_content_size(int fd, uint64_t *content_size) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_CONTENT_SIZE, + content_size); +} + +/* Returns the packet size in the current sub-buffer. */ +int kernctl_get_packet_size(int fd, uint64_t *packet_size) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_PACKET_SIZE, + packet_size); +} + +/* Returns the stream id of the current sub-buffer. */ +int kernctl_get_stream_id(int fd, uint64_t *stream_id) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_STREAM_ID, + stream_id); +} + +/* Returns the current timestamp. */ +int kernctl_get_current_timestamp(int fd, uint64_t *ts) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_CURRENT_TIMESTAMP, + ts); +} + +/* Returns the packet sequence number of the current sub-buffer. */ +int kernctl_get_sequence_number(int fd, uint64_t *seq) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_GET_SEQ_NUM, + seq); +} + +/* Returns the stream instance id. */ +int kernctl_get_instance_id(int fd, uint64_t *id) +{ + return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ABI_RING_BUFFER_INSTANCE_ID, + id); +}