Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH] AFS: Implement shared-writable mmap [try #2] | Date | Thu, 17 May 2007 13:30:01 +0100 |
| |
Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> No, you shouldn't. We could theoretically introduce a new API for this, > but I think it would be preferable if you can fix the race in the fs.
Actually, I might be able to do better.
When making a StoreData call to the AFS server, I send all the parameters first, and at that point, the server will abort it, I think, if permission is not available, and won't wait for the payload to be delivered.
So if I tell AF_RXRPC to send the parameter data with an explicit ACK request and then wait till it's either hard-ACK'd or aborted, I should then be able to deal with the permissions failure at a state where I have locked *all* the pages to be sent.
At that point, I should be able to tell truncate to simple discard all these locked pages.
How's that sound?
David - 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/
| |