Date: Tue, 18 Dec 2001 11:11:00 -0500 From: "ozan s. yigit" <oz@zonzorp.canada.sun.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: freebsd-fs@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: Instead of JFS, why not a whole new FS? Message-ID: <200112181611.LAA26047@zonzorp.canada.sun.com> In-Reply-To: Message from Terry Lambert <tlambert2@mindspring.com> of "Mon, 17 Dec 2001 18:29:46 PST." <3C1EAA1A.CA49932@mindspring.com>
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> Any FS that shares code with an existing FS will not flush out
> the full list of problems associated with writing a new FS in
> the context of a FreeBSD system.
how about an implementation of plan9's kfs? it is fairly simple, with
dentries similar to unix inodes, eg.
typedef struct {
char name[NAMELEN];
short uid;
short gid;
ushort mode;
short wuid;
Qid qid;
long size;
long dblock[NDBLOCK]; /* 6 */
long iblock;
long diblock;
long atime;
long mtime;
} Dentry;
and perhaps would make a good educational implementation. sources for
plan9's own is in plan9/sys/src/cmd/disk, if one needs to take a look.
the document "the plan9 file server" by thompson gives some detail.
oz
---
ozan s. yigit staff engineer, sun microsystems/es
http://www.cs.yorku.ca/~oz ozan.yigit@sun.com || +1 [905] 415 2878
---
narrowness of imagination leads to narrowness of experience. [corollary to rob]
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