📄 yaffs-todo.html
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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="20020501;19062800"> <META NAME="CHANGEDBY" CONTENT=" "> <META NAME="CHANGED" CONTENT="20020821;21171400"></HEAD><BODY><H1>YAFFS Todo as at <SDFIELD TYPE=DATETIME SDNUM="5129;2057;DD/MM/YYYY">21/08/2002</SDFIELD></H1><H3>Stuff not yet done</H3><OL> <LI><P>Directory locking during directory walk.</P> <LI><P>Other locking.... investigate what is needed.</P> <LI><P>Add write memory mapping. We probably need this to support loop mounting.</P> <LI><P>At scan time, check that the file size in the ObjectHeader matches the filesize of the scanned blocks.</P></OL><H3>Tools to be done</H3><OL> <LI><P>Dumper and analyser to work off the mtd.</P></OL><H3>Recently done with no known problems (ie. probably needssignificant testing)</H3><OL> <LI><P>ECC and write failure handling.</P> <LI><P>Added symlinks and hard links to VFS interface.</P> <LI><P>Fixed problem with persistence. Object header was not being updated at end of write and the file size was getting corrupted.</P> <LI><P>Fixed problem where obsoleted object headers were not being deleted on NAND. This caused multiple file entries. Looks like it is working properly now.</P> <LI><P>Read memory mapping. Can now execute a file from yaffs.</P> <LI><P>We now mark a chunk as deleted by marking the OOB data validity flag. Before this we just stomped on the tags, which was mot such a good thing to do with newer NANDs which do not like this sort of thing.</P></OL><OL> <LI><P>File pruning is done in reverse order so that if power is lost part-way through, the file does not have any holes.</P></OL><OL> <LI><P>mkyaffsimage. Tool to make a yaffs image from a directory (in the spirit of mkcramfs).</P> <LI><P>Added support for special inodes (pipes, character & block devices, sockets).</P> <LI><P>Added generic read/write support to use page caching. Selectable by configuration of CONFIG_YAFFS_USE_GENERIC_RW.</P></OL><H3>Done, but currently known to be broken</H3><OL> <LI><P>If you fill yaffs and then try to copy more files into it, you end up with a bunch of objxxx files when you do an ls.</P></OL><H3>Longer term stuff to do</H3><OL> <LI><P>Discuss improved NAND page interface with mtd group. This has actually started. Luc van Oostenryck is also looking at an alternative layer to mtd.</P> <LI><P>Pull out all YAFFS_OK and YAFFS_FAIL style errors and return with -ENOMEM style error messages.</P></OL><P><BR><BR></P></BODY></HTML>⌨️ 快捷键说明
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