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/*
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 * fundamental constants and types of the implementation
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 * changing any of these changes the layout on disk
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 */
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/* the glorious new, incompatible (on disk) 64-bit world */
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/* keeping NAMELEN ≤ 50 bytes permits 3 Dentrys per mag disk sector */
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enum {
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	NAMELEN		= 56,		/* max size of file name components */
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	NDBLOCK		= 6,		/* number of direct blocks in Dentry */
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	NIBLOCK		= 4,		/* max depth of indirect blocks */
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};
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/*
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 * file offsets & sizes, in bytes & blocks.  typically long or vlong.
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 * vlong is used in the code where would be needed if Off were just long.
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 */
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typedef vlong Off;
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#undef COMPAT32
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#define swaboff swab8