*/
#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/trace-clock.h>
+#include "ltt-events.h"
#include "ltt-tracer.h"
-struct ring_buffer_priv {
- struct dentry *dentry;
-}
-
-struct channel_priv {
- struct ltt_trace *trace;
- struct ring_buffer_priv *buf;
-};
-
static const struct lib_ring_buffer_config client_config;
static u64 client_ring_buffer_clock_read(struct channel *chan)
static int client_buffer_create(struct lib_ring_buffer *buf, void *priv,
int cpu, const char *name)
{
- struct channel_priv *chan_priv = priv;
- struct ring_buffer_priv *buf_priv;
- struct dentry *trace_dentry;
- char *tmpname;
- int ret = 0;
-
- if (client_config.alloc == RING_BUFFER_ALLOC_PER_CPU)
- buf_priv = per_cpu_ptr(chan_priv->buf, cpu);
- else
- buf_priv = chan_priv->buf;
-
- tmpname = kzalloc(NAME_MAX + 1, GFP_KERNEL);
- if (!tmpname) {
- ret = -ENOMEM;
- goto end;
- }
-
- snprintf(tmpname, NAME_MAX, "%s%s_%d",
- (client_config.mode == RING_BUFFER_OVERWRITE) ? "flight-" : "",
- name, cpu);
-
- trace_dentry = chan_priv->trace->dentry.trace_root;
- buf_priv->dentry = debugfs_create_file(tmpname, S_IRUSR, trace_dentry,
- buf,
- &lib_ring_buffer_file_operations);
- if (!buf_priv->dentry) {
- ret = -ENOMEM;
- goto free_name;
- }
-free_name:
- kfree(tmpname);
-end:
- return ret;
}
static void client_buffer_finalize(struct lib_ring_buffer *buf, void *priv, int cpu)
{
- struct channel_priv *chan_priv = priv;
- struct lib_ring_buffer_priv *buf_priv;
-
- if (client_config.alloc == RING_BUFFER_ALLOC_PER_CPU)
- buf_priv = per_cpu_ptr(chan_priv->buf, cpu);
- else
- buf_priv = chan_priv->buf;
-
- debugfs_remove(buf_priv->dentry);
}
static const struct lib_ring_buffer_config client_config = {
};
static
-struct channel *ltt_channel_create(const char *name, struct ltt_trace *trace,
- void *buf_addr,
+struct channel *ltt_channel_create(struct ltt_session *session, void *buf_addr,
size_t subbuf_size, size_t num_subbuf,
unsigned int switch_timer_interval,
unsigned int read_timer_interval)
{
- struct channel *chan;
- struct chan_priv *chan_priv;
-
- chan_priv = kzalloc(sizeof(struct chan_priv), GFP_KERNEL);
- if (!chan_priv)
- return NULL;
- if (client_config.alloc == RING_BUFFER_ALLOC_PER_CPU) {
- chan_priv->buf = alloc_percpu(struct lib_ring_buffer_priv);
- memset(chan_priv->buf, 0, sizeof(*chan_priv->buf));
- } else
- chan_priv->buf = kzalloc(sizeof(*chan_priv->buf), GFP_KERNEL)
- if (!channel_priv->buf)
- goto free_chan_priv;
- chan_priv->trace = trace;
- chan = channel_create(&client_config, name, chan_priv, buf_addr,
+ return channel_create(&client_config, "[lttng]", session, buf_addr,
subbuf_size, num_subbuf, switch_timer_interval,
read_timer_interval);
- if (!chan)
- goto free_buf_priv;
- return chan;
-
-free_buf_priv:
- if (client_config.alloc == RING_BUFFER_ALLOC_PER_CPU)
- free_percpu(chan_priv->buf);
- else
- kfree(chan_priv->buf);
-free_chan_priv:
- kfree(chan_priv);
- return NULL;
}
static
void ltt_channel_destroy(struct channel *chan)
{
- struct chan_priv *chan_priv = channel_get_private(chan);
-
channel_destroy(chan);
- if (client_config.alloc == RING_BUFFER_ALLOC_PER_CPU)
- free_percpu(chan_priv->buf);
- else
- kfree(chan_priv->buf);
- kfree(chan_priv);
}
static
lib_ring_buffer_release_read(buf);
}
-static void ltt_relay_remove_dirs(struct ltt_trace *trace)
-{
- debugfs_remove(trace->dentry.trace_root);
-}
-
-static int ltt_relay_create_dirs(struct ltt_trace *new_trace)
-{
- struct dentry *ltt_root_dentry;
- int ret;
-
- ltt_root_dentry = get_ltt_root();
- if (!ltt_root_dentry)
- return ENOENT;
-
- new_trace->dentry.trace_root = debugfs_create_dir(new_trace->trace_name,
- ltt_root_dentry);
- put_ltt_root();
- if (new_trace->dentry.trace_root == NULL) {
- printk(KERN_ERR "LTT : Trace directory name %s already taken\n",
- new_trace->trace_name);
- return EEXIST;
- }
- return 0;
-}
-
static struct ltt_transport ltt_relay_transport = {
.name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING,
.owner = THIS_MODULE,
.ops = {
- .create_dirs = ltt_relay_create_dirs,
- .remove_dirs = ltt_relay_remove_dirs,
.create_channel = ltt_channel_create,
.destroy_channel = ltt_channel_destroy,
.buffer_read_open = ltt_buffer_read_open,