Re: tmpfs + sendfile bug ?

[Christoph Rohland <cr@sap.com>]

Hi Pierre,

On Mon, 21 May 2001, Pierre Etchemaite wrote:
> I just found a problem GETting a file stored in tmpfs using proftpd;
> I always get a "426 Transfer aborted. Data connection closed."
> 
> That could be a bug with tmpfs and sendfile in 2.4.5-pre4 :
> 
> [...]
> read(8, "%PDF-1.4\r%\342\343\317\323\r\n870 0 obj\r<< \r/L"..., 8192) = 8192
> shmat(11, 0x4cfe65, 0x3)                = 0xbffff4d4
> sendfile(11, 8, [0], 5045861)           = -1 EINVAL (Invalid argument)
> [...]
> 
> Any idea ?

That's probably the same reason why tmpfs and loopback do not work
together:

tmpfs does not provide the necessary functions for sendfile and lo:
readpage, prepare_write and commitwrite.

And I do not see a way how to provide readpage in tmpfs :-(

Greetings
		Christoph