#include <linux/seq_file.h>
#include <linux/file.h>
#include <linux/anon_inodes.h>
-#include "wrapper/file.h"
+#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 "wrapper/random.h"
-#include "wrapper/tracepoint.h"
-#include "wrapper/list.h"
-#include "lttng-kernel-version.h"
-#include "lttng-events.h"
-#include "lttng-tracer.h"
-#include "lttng-abi-old.h"
-#include "wrapper/vzalloc.h"
+#include <wrapper/uuid.h>
+#include <wrapper/vmalloc.h> /* for wrapper_vmalloc_sync_all() */
+#include <wrapper/random.h>
+#include <wrapper/tracepoint.h>
+#include <wrapper/list.h>
+#include <lttng-kernel-version.h>
+#include <lttng-events.h>
+#include <lttng-tracer.h>
+#include <lttng-abi-old.h>
+#include <lttng-endian.h>
+#include <wrapper/vzalloc.h>
+#include <wrapper/ringbuffer/backend.h>
+#include <wrapper/ringbuffer/frontend.h>
#define METADATA_CACHE_DEFAULT_SIZE 4096
/* We need to sync enablers with session before activation. */
lttng_session_sync_enablers(session);
+ /* Clear each stream's quiescent state. */
+ list_for_each_entry(chan, &session->chan, list) {
+ if (chan->channel_type != METADATA_CHANNEL)
+ lib_ring_buffer_clear_quiescent_channel(chan->chan);
+ }
+
ACCESS_ONCE(session->active) = 1;
ACCESS_ONCE(session->been_active) = 1;
ret = _lttng_session_metadata_statedump(session);
int lttng_session_disable(struct lttng_session *session)
{
int ret = 0;
+ struct lttng_channel *chan;
mutex_lock(&sessions_mutex);
if (!session->active) {
/* Set transient enabler state to "disabled" */
session->tstate = 0;
lttng_session_sync_enablers(session);
+
+ /* Set each stream's quiescent state. */
+ list_for_each_entry(chan, &session->chan, list) {
+ if (chan->channel_type != METADATA_CHANNEL)
+ lib_ring_buffer_set_quiescent_channel(chan->chan);
+ }
end:
mutex_unlock(&sessions_mutex);
return ret;
? "UTF8"
: "ASCII",
field->type.u.basic.integer.base,
-#ifdef __BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
field->type.u.basic.integer.reverse_byte_order ? " byte_order = le;" : "",
#else
field->type.u.basic.integer.reverse_byte_order ? " byte_order = be;" : "",
? "UTF8"
: "ASCII",
elem_type->u.basic.integer.base,
-#ifdef __BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "",
#else
elem_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "",
? "UTF8"
: "ASCII"),
length_type->u.basic.integer.base,
-#ifdef __BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
length_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "",
#else
length_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "",
? "UTF8"
: "ASCII"),
elem_type->u.basic.integer.base,
-#ifdef __BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
elem_type->u.basic.integer.reverse_byte_order ? " byte_order = le;" : "",
#else
elem_type->u.basic.integer.reverse_byte_order ? " byte_order = be;" : "",
CTF_SPEC_MAJOR,
CTF_SPEC_MINOR,
uuid_s,
-#ifdef __BIG_ENDIAN
+#if __BYTE_ORDER == __BIG_ENDIAN
"be"
#else
"le"
}
EXPORT_SYMBOL_GPL(lttng_transport_unregister);
+#if (defined(CONFIG_HOTPLUG_CPU) && (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)))
+
+enum cpuhp_state lttng_hp_prepare;
+enum cpuhp_state lttng_hp_online;
+
+static int lttng_hotplug_prepare(unsigned int cpu, struct hlist_node *node)
+{
+ struct lttng_cpuhp_node *lttng_node;
+
+ lttng_node = container_of(node, struct lttng_cpuhp_node, node);
+ switch (lttng_node->component) {
+ case LTTNG_RING_BUFFER_FRONTEND:
+ return 0;
+ case LTTNG_RING_BUFFER_BACKEND:
+ return lttng_cpuhp_rb_backend_prepare(cpu, lttng_node);
+ case LTTNG_RING_BUFFER_ITER:
+ return 0;
+ case LTTNG_CONTEXT_PERF_COUNTERS:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int lttng_hotplug_dead(unsigned int cpu, struct hlist_node *node)
+{
+ struct lttng_cpuhp_node *lttng_node;
+
+ lttng_node = container_of(node, struct lttng_cpuhp_node, node);
+ switch (lttng_node->component) {
+ case LTTNG_RING_BUFFER_FRONTEND:
+ return lttng_cpuhp_rb_frontend_dead(cpu, lttng_node);
+ case LTTNG_RING_BUFFER_BACKEND:
+ return 0;
+ case LTTNG_RING_BUFFER_ITER:
+ return 0;
+ case LTTNG_CONTEXT_PERF_COUNTERS:
+ return lttng_cpuhp_perf_counter_dead(cpu, lttng_node);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int lttng_hotplug_online(unsigned int cpu, struct hlist_node *node)
+{
+ struct lttng_cpuhp_node *lttng_node;
+
+ lttng_node = container_of(node, struct lttng_cpuhp_node, node);
+ switch (lttng_node->component) {
+ case LTTNG_RING_BUFFER_FRONTEND:
+ return lttng_cpuhp_rb_frontend_online(cpu, lttng_node);
+ case LTTNG_RING_BUFFER_BACKEND:
+ return 0;
+ case LTTNG_RING_BUFFER_ITER:
+ return lttng_cpuhp_rb_iter_online(cpu, lttng_node);
+ case LTTNG_CONTEXT_PERF_COUNTERS:
+ return lttng_cpuhp_perf_counter_online(cpu, lttng_node);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int lttng_hotplug_offline(unsigned int cpu, struct hlist_node *node)
+{
+ struct lttng_cpuhp_node *lttng_node;
+
+ lttng_node = container_of(node, struct lttng_cpuhp_node, node);
+ switch (lttng_node->component) {
+ case LTTNG_RING_BUFFER_FRONTEND:
+ return lttng_cpuhp_rb_frontend_offline(cpu, lttng_node);
+ case LTTNG_RING_BUFFER_BACKEND:
+ return 0;
+ case LTTNG_RING_BUFFER_ITER:
+ return 0;
+ case LTTNG_CONTEXT_PERF_COUNTERS:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int __init lttng_init_cpu_hotplug(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_BP_PREPARE_DYN, "lttng:prepare",
+ lttng_hotplug_prepare,
+ lttng_hotplug_dead);
+ if (ret < 0) {
+ return ret;
+ }
+ lttng_hp_prepare = ret;
+ lttng_rb_set_hp_prepare(ret);
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "lttng:online",
+ lttng_hotplug_online,
+ lttng_hotplug_offline);
+ if (ret < 0) {
+ cpuhp_remove_multi_state(lttng_hp_prepare);
+ lttng_hp_prepare = 0;
+ return ret;
+ }
+ lttng_hp_online = ret;
+ lttng_rb_set_hp_online(ret);
+
+ return 0;
+}
+
+static void __exit lttng_exit_cpu_hotplug(void)
+{
+ lttng_rb_set_hp_online(0);
+ cpuhp_remove_multi_state(lttng_hp_online);
+ lttng_rb_set_hp_prepare(0);
+ cpuhp_remove_multi_state(lttng_hp_prepare);
+}
+
+#else /* #if (CONFIG_HOTPLUG_CPU && (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))) */
+static int lttng_init_cpu_hotplug(void)
+{
+ return 0;
+}
+static void lttng_exit_cpu_hotplug(void)
+{
+}
+#endif /* #else #if (CONFIG_HOTPLUG_CPU && (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0))) */
+
+
static int __init lttng_events_init(void)
{
int ret;
if (ret)
return ret;
ret = wrapper_get_pfnblock_flags_mask_init();
+ if (ret)
+ return ret;
+ ret = wrapper_get_pageblock_flags_mask_init();
if (ret)
return ret;
ret = lttng_context_init();
ret = lttng_logger_init();
if (ret)
goto error_logger;
+ ret = lttng_init_cpu_hotplug();
+ if (ret)
+ goto error_hotplug;
return 0;
+error_hotplug:
+ lttng_logger_exit();
error_logger:
lttng_abi_exit();
error_abi:
{
struct lttng_session *session, *tmpsession;
+ lttng_exit_cpu_hotplug();
lttng_logger_exit();
lttng_abi_exit();
list_for_each_entry_safe(session, tmpsession, &sessions, list)
projects / lttng-modules.git / blobdiff