SKB_SEQ_READ(9)                          Linux Networking                         SKB_SEQ_READ(9)



NAME
       skb_seq_read - Sequentially read skb data

SYNOPSIS
       unsigned int skb_seq_read(unsigned int consumed, const u8 ** data,
                                 struct skb_seq_state * st);

ARGUMENTS
       consumed
           number of bytes consumed by the caller so far

       data
           destination pointer for data to be returned

       st
           state variable

DESCRIPTION
       Reads a block of skb data at consumed relative to the lower offset specified to
       skb_prepare_seq_read. Assigns the head of the data block to data and returns the length of
       the block or 0 if the end of the skb data or the upper offset has been reached.

       The caller is not required to consume all of the data returned, i.e.  consumed is
       typically set to the number of bytes already consumed and the next call to skb_seq_read
       will return the remaining part of the block.

       Note 1: The size of each block of data returned can be arbitrary, this limitation is the
       cost for zerocopy sequential reads of potentially non linear data.

       Note 2: Fragment lists within fragments are not implemented at the moment, state->root_skb
       could be replaced with a stack for this purpose.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                           SKB_SEQ_READ(9)