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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"><HTML><HEAD> <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1"> <TITLE></TITLE> <META NAME="GENERATOR" CONTENT="StarOffice/5.2 (Linux)"> <META NAME="AUTHOR" CONTENT=" "> <META NAME="CREATED" CONTENT="20020211;20201700"> <META NAME="CHANGEDBY" CONTENT=" "> <META NAME="CHANGED" CONTENT="20020304;21123700"></HEAD><BODY><H3>YAFFS Progress 4 March 2002</H3><H3><BR><BR></H3><H3>Design</H3><P>A few of the design areas needed to be tweaked slightly withoutsignificant impact.</P><P>The only real significance is that what is termed a yaffs_Inodereally becomes an object Id. Where an 'object' is a file, directory,symlink or hard link. This differs from the *nix concept of an inodein that a hard link is not an inode. yaffs_Inode should really berenamed to yaffs_Object to reflect this.</P><P>Rge reason for introducing the object is to provide identifiersfor the objects stored on NAND. For example, each hardlink (whichdoes not have a distinct inode) needs an object Id for storage on </P><H3>Code</H3><P>Pretty much all the guts of the code is there except for:</P><UL> <LI><P>symlink handling (a doddle)</P> <LI><P>hard link handling.</P> <LI><P>some of start-up scanning</P> <LI><P>ECC on tags</P> <LI><P>superblock handling (ie hook-up to mtd and the Linux VFS). Some of this code to be pinched from JFFS2.</P></UL><P>Some of the code has already been tested.</P><P>I will now be testing out the guts on a NAND emulation layer in anapplication. This provides better debugging. I hope to have thisrunning by 11/03/2002. </P><P>Once the guts looks solid on the NAND emulation, I will graft iton to the VFS and mtd - at which point it becomes a real filesystem.</P><H3>Time</H3><P>So far I've logged 90 hours on yaffs. I will not be charging forapprox 15 hours I have spent swotting up on the Linux VFS. I stillbelieve this is on budget.</P><P><BR><BR></P><P><BR><BR></P><P><BR><BR></P></BODY></HTML>?? 快捷鍵說明
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