On Thu, Nov 01, 2007 at 11:17:32PM +0000, Anton Altaparmakov wrote: > On 1 Nov 2007, at 19:16, Steve French wrote: > >madvise_remove (in Linux) is used to free the backing store associated > >with pages (punching a hole in a file). This is one of the vfs > >operations that we do not send over the wire to Samba (so this call > >would return -ENOSYS locally). Any thoughts on whether this could be > >done with an obscure SetFileInfo level or FCNTL or whether it is worth > >adding to the CIFS POSIX Extensions? > > Don't know about SMB/CIFS but on Windows locally you would need to > first set the file sparse, and then to punch the hole. These two > things are accomplished like so on Windows (STARTING_OFFSET is the > first byte of the hole to be punched and END_OFFSET is the first byte > after the hole to be punched):
It would be really great if you could try this with a file on a Windows server and send us the sniffs! Volker
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