1RELAY_OPEN(9)               relay interface support              RELAY_OPEN(9)
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NAME

6       relay_open - create a new relay channel
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SYNOPSIS

9       struct rchan * relay_open(const char * base_filename,
10                                 struct dentry * parent, size_t subbuf_size,
11                                 size_t n_subbufs,
12                                 struct rchan_callbacks * cb,
13                                 void * private_data);
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ARGUMENTS

16       base_filename
17           base name of files to create, NULL for buffering only
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19       parent
20           dentry of parent directory, NULL for root directory or buffer
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22       subbuf_size
23           size of sub-buffers
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25       n_subbufs
26           number of sub-buffers
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28       cb
29           client callback functions
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31       private_data
32           user-defined data
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DESCRIPTION

35       Returns channel pointer if successful, NULL otherwise.
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37       Creates a channel buffer for each cpu using the sizes and attributes
38       specified. The created channel buffer files will be named
39       base_filename0...base_filenameN-1. File permissions will be S_IRUSR.
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41       If opening a buffer (parent = NULL) that you later wish to register in
42       a filesystem, call relay_late_setup_files once the parent dentry is
43       available.
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46Kernel Hackers Manual 3.10         June 2019                     RELAY_OPEN(9)
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