skb_frag_dma_map(9) [centos man page]

SKB_FRAG_DMA_MAP(9)						 Linux Networking					       SKB_FRAG_DMA_MAP(9)

NAME

       skb_frag_dma_map - maps a paged fragment via the DMA API

SYNOPSIS

       dma_addr_t skb_frag_dma_map(struct device * dev, const skb_frag_t * frag, size_t offset, size_t size, enum dma_data_direction dir);

ARGUMENTS

       dev
	   the device to map the fragment to

       frag
	   the paged fragment to map

       offset
	   the offset within the fragment (starting at the fragment's own offset)

       size
	   the number of bytes to map

       dir
	   the direction of the mapping (PCI_DMA_*)

DESCRIPTION

       Maps the page associated with frag to device.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						       SKB_FRAG_DMA_MAP(9)

gd_parent_fragment(3)						      GETDATA						     gd_parent_fragment(3)

NAME

       gd_parent_fragment -- retrieve the parent fragment of a fragment in a dirfile

SYNOPSIS

       #include <getdata.h>

       int gd_parent_fragment(const DIRFILE *dirfile, int fragment_index);

DESCRIPTION

       The  gd_parent_fragment()  function queries a dirfile(5) database specified by dirfile and returns the index of the fragment which contains
       the INCLUDE directive for the fragment indexed by fragment_index.

       Since the primary format specification fragment is not included in any other fragment, passing zero for fragment_index will  result  in	an
       error.

RETURN VALUE

       On  success, gd_parent_fragment() returns the index of the specified fragment's parent.	On error, gd_parent_fragment() returns -1 and sets
       the dirfile error to a non-zero value.  Possible error values are:

       GD_E_BAD_DIRFILE
	       The supplied dirfile was invalid.

       GD_E_BAD_INDEX
	       The supplied index was out of range, or was equal to zero.

       The dirfile error may be retrieved by calling gd_error(3).  A descriptive error string for the last error encountered can be obtained  from
       a call to gd_error_string(3).

SEE ALSO

       dirfile(5), gd_include(3), gd_open(3), gd_fragmentname(3), gd_nfragments(3)

Version 0.7.0							   21 July 2010 					     gd_parent_fragment(3)