relay_open — create a new relay channel
struct rchan * relay_open ( | const char * base_filename, |
| struct dentry * parent, | |
| size_t subbuf_size, | |
| size_t n_subbufs, | |
| struct rchan_callbacks * cb, | |
void * private_data); |
const char * base_filename
base name of files to create, NULL for buffering only
struct dentry * parent
dentry of parent directory, NULL for root directory or buffer
size_t subbuf_sizesize of sub-buffers
size_t n_subbufsnumber of sub-buffers
struct rchan_callbacks * cbclient callback functions
void * private_datauser-defined data
Returns channel pointer if successful, NULL otherwise.
Creates a channel buffer for each cpu using the sizes and
attributes specified. The created channel buffer files
will be named base_filename0...base_filenameN-1. File
permissions will be S_IRUSR.
If opening a buffer (parent = NULL) that you later wish to register
in a filesystem, call relay_late_setup_files once the parent dentry
is available.