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other versions
| RELAY_OPEN(9) | relay interface support | RELAY_OPEN(9) |
NAME¶
relay_open - create a new relay channelSYNOPSIS¶
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);
ARGUMENTS¶
const char * base_filenamebase 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_size
size of sub-buffers
size_t n_subbufs
number of sub-buffers
struct rchan_callbacks * cb
client callback functions
void * private_data
user-defined data
DESCRIPTION¶
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.
COPYRIGHT¶
| July 2017 | Kernel Hackers Manual 4.11 |