#include "wrapper/file.h"
#include <linux/jhash.h>
#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
#include "wrapper/uuid.h"
#include "wrapper/vmalloc.h" /* for wrapper_vmalloc_sync_all() */
#include "lttng-events.h"
#include "lttng-tracer.h"
#include "lttng-abi-old.h"
+#include "wrapper/vzalloc.h"
#define METADATA_CACHE_DEFAULT_SIZE 4096
GFP_KERNEL);
if (!metadata_cache)
goto err_free_session;
- metadata_cache->data = kzalloc(METADATA_CACHE_DEFAULT_SIZE,
- GFP_KERNEL);
+ metadata_cache->data = lttng_vzalloc(METADATA_CACHE_DEFAULT_SIZE);
if (!metadata_cache->data)
goto err_free_cache;
metadata_cache->cache_alloc = METADATA_CACHE_DEFAULT_SIZE;
{
struct lttng_metadata_cache *cache =
container_of(kref, struct lttng_metadata_cache, refcount);
- kfree(cache->data);
+ vfree(cache->data);
kfree(cache);
}
return ret;
}
+int lttng_session_metadata_regenerate(struct lttng_session *session)
+{
+ int ret = 0;
+ struct lttng_channel *chan;
+ struct lttng_event *event;
+ struct lttng_metadata_cache *cache = session->metadata_cache;
+ struct lttng_metadata_stream *stream;
+
+ mutex_lock(&sessions_mutex);
+ if (!session->active) {
+ ret = -EBUSY;
+ goto end;
+ }
+
+ mutex_lock(&cache->lock);
+ memset(cache->data, 0, cache->cache_alloc);
+ cache->metadata_written = 0;
+ cache->version++;
+ list_for_each_entry(stream, &session->metadata_cache->metadata_stream, list) {
+ stream->metadata_out = 0;
+ stream->metadata_in = 0;
+ }
+ mutex_unlock(&cache->lock);
+
+ session->metadata_dumped = 0;
+ list_for_each_entry(chan, &session->chan, list) {
+ chan->metadata_dumped = 0;
+ }
+
+ list_for_each_entry(event, &session->events, list) {
+ event->metadata_dumped = 0;
+ }
+
+ ret = _lttng_session_metadata_statedump(session);
+
+end:
+ mutex_unlock(&sessions_mutex);
+ return ret;
+}
+
+
+
int lttng_channel_enable(struct lttng_channel *channel)
{
int ret = 0;
ret = -EEXIST;
goto end;
}
- ACCESS_ONCE(event->enabled) = 1;
- lttng_session_sync_enablers(event->chan->session);
+ switch (event->instrumentation) {
+ case LTTNG_KERNEL_TRACEPOINT:
+ case LTTNG_KERNEL_SYSCALL:
+ ret = -EINVAL;
+ break;
+ case LTTNG_KERNEL_KPROBE:
+ case LTTNG_KERNEL_FUNCTION:
+ case LTTNG_KERNEL_NOOP:
+ ACCESS_ONCE(event->enabled) = 1;
+ break;
+ case LTTNG_KERNEL_KRETPROBE:
+ ret = lttng_kretprobes_event_enable_state(event, 1);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ ret = -EINVAL;
+ }
end:
mutex_unlock(&sessions_mutex);
return ret;
ret = -EEXIST;
goto end;
}
- ACCESS_ONCE(event->enabled) = 0;
- lttng_session_sync_enablers(event->chan->session);
+ switch (event->instrumentation) {
+ case LTTNG_KERNEL_TRACEPOINT:
+ case LTTNG_KERNEL_SYSCALL:
+ ret = -EINVAL;
+ break;
+ case LTTNG_KERNEL_KPROBE:
+ case LTTNG_KERNEL_FUNCTION:
+ case LTTNG_KERNEL_NOOP:
+ ACCESS_ONCE(event->enabled) = 0;
+ break;
+ case LTTNG_KERNEL_KRETPROBE:
+ ret = lttng_kretprobes_event_enable_state(event, 0);
+ break;
+ default:
+ WARN_ON_ONCE(1);
+ ret = -EINVAL;
+ }
end:
mutex_unlock(&sessions_mutex);
return ret;
smp_wmb();
break;
case LTTNG_KERNEL_KPROBE:
- event->enabled = 1;
+ /*
+ * Needs to be explicitly enabled after creation, since
+ * we may want to apply filters.
+ */
+ event->enabled = 0;
event->registered = 1;
/*
* Populate lttng_event structure before event
struct lttng_event *event_return;
/* kretprobe defines 2 events */
- event->enabled = 1;
+ /*
+ * Needs to be explicitly enabled after creation, since
+ * we may want to apply filters.
+ */
+ event->enabled = 0;
event->registered = 1;
event_return =
kmem_cache_zalloc(event_cache, GFP_KERNEL);
event_return->chan = chan;
event_return->filter = filter;
event_return->id = chan->free_event_id++;
- event_return->enabled = 1;
+ event_return->enabled = 0;
event_return->registered = 1;
event_return->instrumentation = itype;
/*
break;
}
case LTTNG_KERNEL_FUNCTION:
- event->enabled = 1;
+ /*
+ * Needs to be explicitly enabled after creation, since
+ * we may want to apply filters.
+ */
+ event->enabled = 0;
event->registered = 1;
/*
* Populate lttng_event structure before event
break;
case LTTNG_KERNEL_NOOP:
case LTTNG_KERNEL_SYSCALL:
- event->enabled = 1;
+ /*
+ * Needs to be explicitly enabled after creation, since
+ * we may want to apply filters.
+ */
+ event->enabled = 0;
event->registered = 0;
event->desc = event_desc;
if (!event->desc) {
if (stream->metadata_in != stream->metadata_out)
goto end;
+ /* Metadata regenerated, change the version. */
+ if (stream->metadata_cache->version != stream->version)
+ stream->version = stream->metadata_cache->version;
+
len = stream->metadata_cache->metadata_written -
stream->metadata_in;
if (!len)
tmp_cache_alloc_size = max_t(unsigned int,
session->metadata_cache->cache_alloc + len,
session->metadata_cache->cache_alloc << 1);
- tmp_cache_realloc = krealloc(session->metadata_cache->data,
- tmp_cache_alloc_size, GFP_KERNEL);
+ tmp_cache_realloc = lttng_vzalloc(tmp_cache_alloc_size);
if (!tmp_cache_realloc)
goto err;
+ if (session->metadata_cache->data) {
+ memcpy(tmp_cache_realloc,
+ session->metadata_cache->data,
+ session->metadata_cache->cache_alloc);
+ vfree(session->metadata_cache->data);
+ }
+
session->metadata_cache->cache_alloc = tmp_cache_alloc_size;
session->metadata_cache->data = tmp_cache_realloc;
}
" uint64_clock_monotonic_t timestamp_end;\n"
" uint64_t content_size;\n"
" uint64_t packet_size;\n"
+ " uint64_t packet_seq_num;\n"
" unsigned long events_discarded;\n"
" uint32_t cpu_id;\n"
"};\n\n"
uint64_t measure_clock_offset(void)
{
uint64_t offset, monotonic[2], realtime;
+ uint64_t tcf = trace_clock_freq();
struct timespec rts = { 0, 0 };
unsigned long flags;
local_irq_restore(flags);
offset = (monotonic[0] + monotonic[1]) >> 1;
- realtime = (uint64_t) rts.tv_sec * NSEC_PER_SEC;
- realtime += rts.tv_nsec;
+ realtime = (uint64_t) rts.tv_sec * tcf;
+ if (tcf == NSEC_PER_SEC) {
+ realtime += rts.tv_nsec;
+ } else {
+ uint64_t n = rts.tv_nsec * tcf;
+
+ do_div(n, NSEC_PER_SEC);
+ realtime += n;
+ }
offset = realtime - offset;
return offset;
}
" uint32_t magic;\n"
" uint8_t uuid[16];\n"
" uint32_t stream_id;\n"
+ " uint64_t stream_instance_id;\n"
" };\n"
"};\n\n",
lttng_alignof(uint8_t) * CHAR_BIT,
ret = lttng_metadata_printf(session,
"clock {\n"
- " name = %s;\n",
- "monotonic"
+ " name = \"%s\";\n",
+ trace_clock_name()
);
if (ret)
goto end;
}
ret = lttng_metadata_printf(session,
- " description = \"Monotonic Clock\";\n"
+ " description = \"%s\";\n"
" freq = %llu; /* Frequency, in Hz */\n"
" /* clock value offset from Epoch is: offset * (1/freq) */\n"
" offset = %llu;\n"
"};\n\n",
+ trace_clock_description(),
(unsigned long long) trace_clock_freq(),
(unsigned long long) measure_clock_offset()
);
ret = lttng_metadata_printf(session,
"typealias integer {\n"
" size = 27; align = 1; signed = false;\n"
- " map = clock.monotonic.value;\n"
+ " map = clock.%s.value;\n"
"} := uint27_clock_monotonic_t;\n"
"\n"
"typealias integer {\n"
" size = 32; align = %u; signed = false;\n"
- " map = clock.monotonic.value;\n"
+ " map = clock.%s.value;\n"
"} := uint32_clock_monotonic_t;\n"
"\n"
"typealias integer {\n"
" size = 64; align = %u; signed = false;\n"
- " map = clock.monotonic.value;\n"
+ " map = clock.%s.value;\n"
"} := uint64_clock_monotonic_t;\n\n",
+ trace_clock_name(),
lttng_alignof(uint32_t) * CHAR_BIT,
- lttng_alignof(uint64_t) * CHAR_BIT
+ trace_clock_name(),
+ lttng_alignof(uint64_t) * CHAR_BIT,
+ trace_clock_name()
);
if (ret)
goto end;