Messages in this thread | | | Date | Fri, 23 Mar 2001 17:16:13 +0000 | From | Matthew Wilcox <> | Subject | Re: [RFC] sane access to per-fs metadata (was Re: [PATCH] Documentation/ioctl-number.txt) |
| |
On Fri, Mar 23, 2001 at 09:56:47AM -0700, Bryan Henderson wrote: > There's a lot of cool simplicity in this, both in implementation and > application, but it leaves something to be desired in functionality. This > is partly because the price you pay for being able to use existing, > well-worn Unix interfaces is the ancient limitations of those interfaces > -- like the inability to return adequate error information.
hmm... open("defrag-error") first, then read from it if it fails?
> effective the defrag was? And bear in mind that multiple processes may be > issuing commands to /mnt/control simultaneously.
you should probably serialise them. you probably have to do this anyway.
> With ioctl, I can easily match a response of any kind to a request. I can > even return an English text message if I want to be friendly.
yes, one of the nice plan9 changes was the change to returning strings instead of numerics.
-- Revolutions do not require corporate support. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |