[haiku-development] Re: [GSoC proposal] IMAP FS - A few queries
- From: Anshul Singhle <xashck@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Fri, 15 Apr 2011 00:39:31 +0530
>To me it starts to sounds as though you have misunderstood the concept of
the IMAP FS. The IMAP FS will not work by mapping files in the BFS file
system elsewhere. It is completely in control of the exposed file system
contents. For example, it >can publish an e-mail file and advertise a
certain file size. This happens by way of implementing the file system hooks
and just declaring objects to be there. They don't have to exist on the
harddrive at all. Advertising a certain file size does not >mean the e-mail
is already downloaded in full
Hmm.I got the point. Can we discuss more in terms of implementation? As i
understand it, IMAP FS will make vnodes and create the file metadata from
the data fetched initially, i.e. headers. Now, when the
fs_vnode_ops::read<http://api.haiku-os.org/structfs__vnode__ops.html#a3d5f1013644389c3efee43b3e175aa34>hook
is called, instead of getting data from the disk, it gets it from the
user's IMAP account, also optionally saving it(in another Filesystem). The
read hook is an example, similar things would be done with other hooks. Am i
reading this right?
Also, it would be great if you can point to some FS that does this i.e. gets
data from a source other than disk. Is NetFS relevent?
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