[libvirt] [Qemu-devel] [PATCH v2 4/4] block: Convert open calls to qemu_open

[Kevin Wolf]

Am 08.06.2012 17:42, schrieb Corey Bryant:
> This patch converts all block layer open calls to qemu_open.  This
> enables all block layer open paths to dup(X) a pre-opened file
> descriptor if the filename is of the format /dev/fd/X.  This is
> useful if QEMU is restricted from opening certain files.
> 
> Note that this adds the O_CLOEXEC flag to the changed open paths
> when the O_CLOEXEC macro is defined.
> 
> v2:
>  -Convert calls to qemu_open instead of file_open (kwolf at redhat.com)
>  -Mention introduction of O_CLOEXEC (kwolf at redhat.com)
> 
> Signed-off-by: Corey Bryant <coreyb at linux.vnet.ibm.com>

> @@ -950,7 +950,7 @@ static int floppy_probe_device(const char *filename)
>      if (strstart(filename, "/dev/fd", NULL))
>          prio = 50;

Good to have this context here. I think this has to be removed in
another patch or all our file descriptors will become host_floppy...

>  
> -    fd = open(filename, O_RDONLY | O_NONBLOCK);
> +    fd = qemu_open(filename, O_RDONLY | O_NONBLOCK);
>      if (fd < 0) {
>          goto out;
>      }

Kevin