Date: Tue, 26 Nov 1996 14:30:14 -0500 (EST) From: Son To <son@res50.resnet.upenn.edu> To: freebsd-fs@FreeBSD.org Subject: stackable fs Message-ID: <199611261930.OAA16552@res50.resnet.upenn.edu>
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Hello, I am experimenting with stackable fs. I am having difficulty understanding where data is passed down to the lower vnode. What I want to do is build a layer that will add an 'a' (thus I call it afs) in front of all data that pass through this layer. For example, if afs is mounted on /mnt/afs, then whatever file I create in /mnt/afs will begin with an 'a'. This fs is totally useless, but I'm doing to learn how data is pass from one layer to another. Looking at the source union_fs source, I think I have to make an int afs_write(struct something *ap) function. Where in the ap structure is data contained? Does anyoneu have pointers? thanks, Son
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