Re: ramfs problem... (unlink of sparse file in "D" state)

[Chris Wedgwood <cw@f00f.org>]

On Mon, Jan 08, 2001 at 02:56:10AM -0500, Alexander Viro wrote:

    	Plenty. ext2, for one - e.g. with 4Kb blocks you have limit
    at 0x4010040c000 for files and 0x100000000 for directories. With
    1Kb blocks the limit for files is 0x404043000. Notice that the
    latter is not a multiple of page size on Alpha.

There is code to support this in 2.4.0-ac4 -- initially I didn't like
the way Alan had done things (I was think -EFBIG should be used only
for LFS violations) but after some thought has decided that what he
has makes a lot of sense.

The FS calculates the largest suitable byte-size for a file in put it
in the superblock; when the VFS checks in the generic_file_* paths.
The only time this won't work is if some complex criteria allows some
files to be larger than others, in which case -- we add a callback to
the fs.



  --cw

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