/*
* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2 only,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
+#define _LGPL_SOURCE
#define __USE_LINUX_IOCTL_DEFS
#include <sys/ioctl.h>
+#include <string.h>
+#include <common/align.h>
+#include <common/macros.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <common/time.h>
#include "kernel-ctl.h"
#include "kernel-ioctl.h"
+#define LTTNG_IOCTL_CHECK(fildes, request, ...) ({ \
+ int ret = ioctl(fildes, request, ##__VA_ARGS__);\
+ assert(ret <= 0); \
+ !ret ? 0 : -errno; \
+})
+
+#define LTTNG_IOCTL_NO_CHECK(fildes, request, ...) ({ \
+ int ret = ioctl(fildes, request, ##__VA_ARGS__);\
+ ret >= 0 ? 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_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_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_use_old_abi == -1) {
+ ret = LTTNG_IOCTL_NO_CHECK(fd, newname);
+ if (!ret) {
+ lttng_kernel_use_old_abi = 0;
+ goto end;
+ }
+ lttng_kernel_use_old_abi = 1;
+ }
+ if (lttng_kernel_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 ioctl(fd, LTTNG_KERNEL_SESSION);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION,
+ LTTNG_KERNEL_SESSION);
}
/* open the metadata global channel */
int kernctl_open_metadata(int fd, struct lttng_channel_attr *chops)
{
- return ioctl(fd, LTTNG_KERNEL_METADATA, chops);
+ struct lttng_kernel_channel channel;
+
+ if (lttng_kernel_use_old_abi) {
+ struct lttng_kernel_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_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_METADATA, &channel);
}
int kernctl_create_channel(int fd, struct lttng_channel_attr *chops)
{
- return ioctl(fd, LTTNG_KERNEL_CHANNEL, chops);
+ struct lttng_kernel_channel channel;
+
+ memset(&channel, 0, sizeof(channel));
+ if (lttng_kernel_use_old_abi) {
+ struct lttng_kernel_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_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_CHANNEL, &channel);
+}
+
+int kernctl_syscall_mask(int fd, char **syscall_mask, uint32_t *nr_bits)
+{
+ struct lttng_kernel_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_SYSCALL_MASK, &kmask_len);
+ if (ret) {
+ goto end;
+ }
+
+ array_alloc_len = ALIGN(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_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)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_TRACK_PID, pid);
+}
+
+int kernctl_untrack_pid(int fd, int pid)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_UNTRACK_PID, pid);
+}
+
+int kernctl_list_tracker_pids(int fd)
+{
+ return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS);
+}
+
+int kernctl_session_regenerate_metadata(int fd)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_METADATA_REGEN);
+}
+
+int kernctl_session_regenerate_statedump(int fd)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_SESSION_STATEDUMP);
+}
+
+int kernctl_session_set_name(int fd, const char *name)
+{
+ int ret;
+ struct lttng_kernel_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_SESSION_SET_NAME, &session_name);
+end:
+ return ret;
+}
+
+int kernctl_session_set_creation_time(int fd, time_t time)
+{
+ int ret;
+ struct lttng_kernel_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_SESSION_SET_CREATION_TIME,
+ &creation_time);
+end:
+ return ret;
}
int kernctl_create_stream(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_STREAM);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_STREAM,
+ LTTNG_KERNEL_STREAM);
}
int kernctl_create_event(int fd, struct lttng_kernel_event *ev)
{
- return ioctl(fd, LTTNG_KERNEL_EVENT, ev);
+ if (lttng_kernel_use_old_abi) {
+ struct lttng_kernel_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_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_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_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_OLD_EVENT,
+ &old_event);
+ }
+ return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_EVENT, ev);
}
int kernctl_add_context(int fd, struct lttng_kernel_context *ctx)
{
- return ioctl(fd, LTTNG_KERNEL_CONTEXT, ctx);
+ if (lttng_kernel_use_old_abi) {
+ struct lttng_kernel_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_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_OLD_CONTEXT, &old_ctx);
+ }
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_CONTEXT, ctx);
}
-/* Enable event, channel and session ioctl */
+/* Enable event, channel and session LTTNG_IOCTL_CHECK */
int kernctl_enable(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_ENABLE);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_ENABLE,
+ LTTNG_KERNEL_ENABLE);
}
-/* Disable event, channel and session ioctl */
+/* Disable event, channel and session LTTNG_IOCTL_CHECK */
int kernctl_disable(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_DISABLE);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_DISABLE,
+ LTTNG_KERNEL_DISABLE);
}
int kernctl_start_session(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_SESSION_START);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_START,
+ LTTNG_KERNEL_SESSION_START);
}
int kernctl_stop_session(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_SESSION_STOP);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_SESSION_STOP,
+ LTTNG_KERNEL_SESSION_STOP);
}
+int kernctl_filter(int fd, struct lttng_filter_bytecode *filter)
+{
+ struct lttng_kernel_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_FILTER, kb);
+ free(kb);
+ return ret;
+}
+
+int kernctl_add_callsite(int fd, struct lttng_kernel_event_callsite *callsite)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_ADD_CALLSITE, callsite);
+}
int kernctl_tracepoint_list(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_TRACEPOINT_LIST);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_TRACEPOINT_LIST,
+ LTTNG_KERNEL_TRACEPOINT_LIST);
+}
+
+int kernctl_syscall_list(int fd)
+{
+ return LTTNG_IOCTL_NO_CHECK(fd, LTTNG_KERNEL_SYSCALL_LIST);
}
int kernctl_tracer_version(int fd, struct lttng_kernel_tracer_version *v)
{
- return ioctl(fd, LTTNG_KERNEL_TRACER_VERSION, v);
+ int ret;
+
+ if (lttng_kernel_use_old_abi == -1) {
+ ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_VERSION, v);
+ if (!ret) {
+ lttng_kernel_use_old_abi = 0;
+ goto end;
+ }
+ lttng_kernel_use_old_abi = 1;
+ }
+ if (lttng_kernel_use_old_abi) {
+ struct lttng_kernel_old_tracer_version old_v;
+
+ ret = LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_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_TRACER_VERSION, v);
+ }
+
+end:
+ return ret;
+}
+
+int kernctl_tracer_abi_version(int fd,
+ struct lttng_kernel_tracer_abi_version *v)
+{
+ return LTTNG_IOCTL_CHECK(fd, LTTNG_KERNEL_TRACER_ABI_VERSION, v);
}
int kernctl_wait_quiescent(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_WAIT_QUIESCENT);
+ return compat_ioctl_no_arg(fd, LTTNG_KERNEL_OLD_WAIT_QUIESCENT,
+ LTTNG_KERNEL_WAIT_QUIESCENT);
}
-int kernctl_calibrate(int fd, struct lttng_kernel_calibrate *calibrate)
+int kernctl_buffer_flush(int fd)
{
- return ioctl(fd, LTTNG_KERNEL_CALIBRATE, calibrate);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH);
}
+int kernctl_buffer_flush_empty(int fd)
+{
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_FLUSH_EMPTY);
+}
-int kernctl_buffer_flush(int fd)
+int kernctl_buffer_clear(int fd)
{
- return ioctl(fd, RING_BUFFER_FLUSH);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_CLEAR);
}
+/* returns the version of the metadata. */
+int kernctl_get_metadata_version(int fd, uint64_t *version)
+{
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_METADATA_VERSION, version);
+}
+
+int kernctl_metadata_cache_dump(int fd)
+{
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_METADATA_CACHE_DUMP);
+}
/* Buffer operations */
/* returns the length to mmap. */
int kernctl_get_mmap_len(int fd, unsigned long *len)
{
- return ioctl(fd, RING_BUFFER_GET_MMAP_LEN, len);
+ return LTTNG_IOCTL_CHECK(fd, 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 ioctl(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_MAX_SUBBUF_SIZE, len);
}
/*
/* returns the offset of the subbuffer belonging to the mmap reader. */
int kernctl_get_mmap_read_offset(int fd, unsigned long *off)
{
- return ioctl(fd, RING_BUFFER_GET_MMAP_READ_OFFSET, off);
+ return LTTNG_IOCTL_CHECK(fd, 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 ioctl(fd, RING_BUFFER_GET_SUBBUF_SIZE, len);
+ return LTTNG_IOCTL_CHECK(fd, 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 ioctl(fd, RING_BUFFER_GET_PADDED_SUBBUF_SIZE, len);
+ return LTTNG_IOCTL_CHECK(fd, 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 ioctl(fd, RING_BUFFER_GET_NEXT_SUBBUF);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_NEXT_SUBBUF);
}
/* Release exclusive sub-buffer access, move consumer forward. */
int kernctl_put_next_subbuf(int fd)
{
- return ioctl(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_PUT_NEXT_SUBBUF);
}
/* snapshot */
/* Get a snapshot of the current ring buffer producer and consumer positions */
int kernctl_snapshot(int fd)
{
- return ioctl(fd, RING_BUFFER_SNAPSHOT);
+ return LTTNG_IOCTL_CHECK(fd, 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, RING_BUFFER_SNAPSHOT_SAMPLE_POSITIONS);
}
/* Get the consumer position (iteration start) */
int kernctl_snapshot_get_consumed(int fd, unsigned long *pos)
{
- return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_SNAPSHOT_GET_CONSUMED, pos);
}
/* Get the producer position (iteration end) */
int kernctl_snapshot_get_produced(int fd, unsigned long *pos)
{
- return ioctl(fd, RING_BUFFER_SNAPSHOT_GET_PRODUCED, pos);
+ return LTTNG_IOCTL_CHECK(fd, 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 ioctl(fd, RING_BUFFER_GET_SUBBUF, len);
+ return LTTNG_IOCTL_CHECK(fd, RING_BUFFER_GET_SUBBUF, len);
}
/* Release exclusive sub-buffer access */
int kernctl_put_subbuf(int fd)
{
- return ioctl(fd, RING_BUFFER_PUT_SUBBUF);
+ return LTTNG_IOCTL_CHECK(fd, 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_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_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_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_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_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_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_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_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_RING_BUFFER_INSTANCE_ID, id);
}
projects / lttng-tools.git / blobdiff