Messages in this thread | | | Date | Fri, 21 Nov 2008 17:44:26 +0000 | From | Américo Wang <> | Subject | Re: uml: using hostfs as rootfs is not working |
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On Wed, Nov 19, 2008 at 07:32:16PM +0100, Jan Engelhardt wrote: >Hi, >
Hi, Jan!
> >as per Documentation/uml/*txt, I issued the following to get a direct >hostfs: > > ./linux ubd0=/tftpboot/linux > >(/tftpboot/linux/sbin/init exists), but the UM kernel only gives: > >Failed to open '/home/tftpboot/linux', errno = 21
I think this error comes from arch/um/drivers/ubd_kern.c::ubd_open_dev()
>ubda: Can't open "/home/tftpboot/linux": errno = 21
This is from the caller: ubd_open().
ubd_open_dev() calls open_ubd_file() to open the ubd device, which, in turn, calls os_open_file() which is a wrapper of open64().
And errno 21 should be EISDIR, for open(), which means we invoked it with a writing operation, probably O_RDWR...
So I think there must be something wrong in the code, writing to a directory is suspicious...
I will try to check it.
Thank you!
-- "Sometimes the only way to stay sane is to go a little crazy."
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