sa_hdr_phys Struct Reference

header for all bonus and spill buffers. More...

#include <sa_impl.h>

Data Fields
uint32_t	sa_magic
uint16_t	sa_layout_info
	Encoded with hdrsize and layout number sa_hdr_phys -> sa_layout_info.
uint16_t	sa_lengths [1]
	optional sizes for variable length attrs

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Detailed Description

header for all bonus and spill buffers.

The header has a fixed portion with a variable number of "lengths" depending on the number of variable sized attribues which are determined by the "layout number"

Definition at line 161 of file sa_impl.h.

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Field Documentation

uint16_t sa_hdr_phys::sa_layout_info

Encoded with hdrsize and layout number sa_hdr_phys -> sa_layout_info.

	   16      10       0
	   +--------+-------+
	   | hdrsz  |layout |
	   +--------+-------+
	 

Bits 0-10 are the layout number Bits 11-16 are the size of the header. The hdrsize is the number * 8

For example.

• hdrsz of 1 ==> 8 byte header
• hdrsz of 2 ==> 16 byte header

Definition at line 182 of file sa_impl.h.

uint16_t sa_hdr_phys::sa_lengths[1]

optional sizes for variable length attrs

Definition at line 183 of file sa_impl.h.

uint32_t sa_hdr_phys::sa_magic

Definition at line 162 of file sa_impl.h.

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The documentation for this struct was generated from the following file:

• sys/sa_impl.h