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DO_SPLICE_DIRECT(9) splice API DO_SPLICE_DIRECT(9)

NAME

do_splice_direct - splices data directly between two files

SYNOPSIS

long do_splice_direct(struct file * in, loff_t * ppos, struct file * out, loff_t * opos, size_t len, unsigned int flags);

ARGUMENTS

in
file to splice from

ppos

input file offset

out

file to splice to

opos

output file offset

len

number of bytes to splice

flags

splice modifier flags

DESCRIPTION

For use by do_sendfile. splice can easily emulate sendfile, but doing it in the application would incur an extra system call (splice in + splice out, as compared to just sendfile). So this helper can splice directly through a process-private pipe.

COPYRIGHT

April 2019 Kernel Hackers Manual 4.9.