/**
* vfs_lib_ring_buffer_open - ring buffer open file operation
* @inode: opened inode
* @file: opened file
*
* Open implementation. Makes sure only one open instance of a buffer is
* done at a given moment.
*/
static
int vfs_lib_ring_buffer_open(struct inode *inode, struct file *file)
{
struct lib_ring_buffer *buf = inode->i_private;
file->private_data = buf;
return lib_ring_buffer_open(inode, file, buf);
}
/*
* This is not used by anonymous file descriptors. This code is left
* there if we ever want to implement an inode with open() operation.
*/
static
int lttng_metadata_ring_buffer_open(struct inode *inode, struct file *file)
{
struct lttng_metadata_stream *stream = inode->i_private;
struct lib_ring_buffer *buf = stream->priv;
file->private_data = buf;
/*
* Since life-time of metadata cache differs from that of
* session, we need to keep our own reference on the transport.
*/
if (!try_module_get(stream->transport->owner)) {
printk(KERN_WARNING "LTT : Can't lock transport module.\n");
return -EBUSY;
}
return lib_ring_buffer_open(inode, file, buf);
}
