1SKB_SEQ_READ(9)                Linux Networking                SKB_SEQ_READ(9)
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NAME

6       skb_seq_read - Sequentially read skb data
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SYNOPSIS

9       unsigned int skb_seq_read(unsigned int consumed, const u8 ** data,
10                                 struct skb_seq_state * st);
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ARGUMENTS

13       consumed
14           number of bytes consumed by the caller so far
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16       data
17           destination pointer for data to be returned
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19       st
20           state variable
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DESCRIPTION

23       Reads a block of skb data at consumed relative to the lower offset
24       specified to skb_prepare_seq_read. Assigns the head of the data block
25       to data and returns the length of the block or 0 if the end of the skb
26       data or the upper offset has been reached.
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28       The caller is not required to consume all of the data returned, i.e.
29       consumed is typically set to the number of bytes already consumed and
30       the next call to skb_seq_read will return the remaining part of the
31       block.
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NOTE 1

34       The size of each block of data returned can be arbitrary, this
35       limitation is the cost for zerocopy seqeuental reads of potentially non
36       linear data.
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NOTE 2

39       Fragment lists within fragments are not implemented at the moment,
40       state->root_skb could be replaced with a stack for this purpose.
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43Kernel Hackers Manual 3.10         June 2019                   SKB_SEQ_READ(9)
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