static const struct file_operations lttng_metadata_fops;
static const struct file_operations lttng_event_fops;
+/*
+ * Teardown management: opened file descriptors keep a refcount on the module,
+ * so it can only exit when all file descriptors are closed.
+ */
+
enum channel_type {
PER_CPU_CHANNEL,
METADATA_CHANNEL,
(struct lttng_kernel_tracer_version __user *) arg);
case LTTNG_KERNEL_TRACEPOINT_LIST:
return lttng_abi_tracepoint_list();
+ case LTTNG_KERNEL_WAIT_QUIESCENT:
+ synchronize_trace();
+ return 0;
+ case LTTNG_KERNEL_CALIBRATE:
+ {
+ struct lttng_kernel_calibrate __user *ucalibrate =
+ (struct lttng_kernel_calibrate __user *) arg;
+ struct lttng_kernel_calibrate calibrate;
+ int ret;
+
+ if (copy_from_user(&calibrate, ucalibrate, sizeof(calibrate)))
+ return -EFAULT;
+ ret = lttng_calibrate(&calibrate);
+ if (copy_to_user(ucalibrate, &calibrate, sizeof(calibrate)))
+ return -EFAULT;
+ return ret;
+ }
default:
return -ENOIOCTLCMD;
}
}
static const struct file_operations lttng_fops = {
+ .owner = THIS_MODULE,
.unlocked_ioctl = lttng_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = lttng_ioctl,
.name = "lttng_metadata",
};
struct ltt_event *event;
- int ret;
/*
* We tolerate no failure path after event creation. It will stay
*/
event = ltt_event_create(channel, &metadata_params, NULL);
if (!event) {
- ret = -EINVAL;
goto create_error;
}
return;
enum channel_type channel_type)
{
struct ltt_session *session = session_file->private_data;
- const struct file_operations *fops;
+ const struct file_operations *fops = NULL;
const char *transport_name;
struct ltt_channel *chan;
struct file *chan_file;
ret = chan_fd;
goto fd_error;
}
+ switch (channel_type) {
+ case PER_CPU_CHANNEL:
+ fops = <tng_channel_fops;
+ break;
+ case METADATA_CHANNEL:
+ fops = <tng_metadata_fops;
+ break;
+ }
+
chan_file = anon_inode_getfile("[lttng_channel]",
- <tng_channel_fops,
+ fops,
NULL, O_RDWR);
if (IS_ERR(chan_file)) {
ret = PTR_ERR(chan_file);
}
switch (channel_type) {
case PER_CPU_CHANNEL:
- transport_name = chan_param.overwrite ?
- "relay-overwrite" : "relay-discard";
- fops = <tng_channel_fops;
+ if (chan_param.output == LTTNG_KERNEL_SPLICE) {
+ transport_name = chan_param.overwrite ?
+ "relay-overwrite" : "relay-discard";
+ } else if (chan_param.output == LTTNG_KERNEL_MMAP) {
+ transport_name = chan_param.overwrite ?
+ "relay-overwrite-mmap" : "relay-discard-mmap";
+ } else {
+ return -EINVAL;
+ }
break;
case METADATA_CHANNEL:
- transport_name = "relay-metadata";
- fops = <tng_metadata_fops;
+ if (chan_param.output == LTTNG_KERNEL_SPLICE)
+ transport_name = "relay-metadata";
+ else if (chan_param.output == LTTNG_KERNEL_MMAP)
+ transport_name = "relay-metadata-mmap";
+ else
+ return -EINVAL;
break;
default:
transport_name = "<unknown>";
}
static const struct file_operations lttng_session_fops = {
+ .owner = THIS_MODULE,
.release = lttng_session_release,
.unlocked_ioctl = lttng_session_ioctl,
#ifdef CONFIG_COMPAT
return -EFAULT;
event_param.name[LTTNG_SYM_NAME_LEN - 1] = '\0';
switch (event_param.instrumentation) {
+ case LTTNG_KERNEL_KRETPROBE:
+ event_param.u.kretprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
+ break;
case LTTNG_KERNEL_KPROBE:
event_param.u.kprobe.symbol_name[LTTNG_SYM_NAME_LEN - 1] = '\0';
break;
return POLLERR;
if (channel->ops->is_finalized(channel->chan))
return POLLHUP;
- else
+ if (channel->ops->buffer_has_read_closed_stream(channel->chan))
return POLLIN | POLLRDNORM;
+ return 0;
}
return mask;
}
static const struct file_operations lttng_channel_fops = {
+ .owner = THIS_MODULE,
.release = lttng_channel_release,
.poll = lttng_channel_poll,
.unlocked_ioctl = lttng_channel_ioctl,
};
static const struct file_operations lttng_metadata_fops = {
+ .owner = THIS_MODULE,
.release = lttng_channel_release,
.unlocked_ioctl = lttng_metadata_ioctl,
#ifdef CONFIG_COMPAT
/* TODO: filter control ioctl */
static const struct file_operations lttng_event_fops = {
+ .owner = THIS_MODULE,
.release = lttng_event_release,
.unlocked_ioctl = lttng_event_ioctl,
#ifdef CONFIG_COMPAT