On Wed, 8 Nov 2006 15:51:13 +0100 Eric Dumazet <[EMAIL PROTECTED]> wrote:
> [PATCH] eventpoll : In case a fault occurs during copy_to_user(), we should > report the count of events that were successfully copied into user space, > instead of EFAULT. That would be consistent with behavior of read/write() > syscalls for example. > > Signed-off-by: Eric Dumazet <[EMAIL PROTECTED]> > > > > [eventpoll.patch text/plain (424B)] > --- linux/fs/eventpoll.c 2006-11-08 15:37:36.000000000 +0100 > +++ linux/fs/eventpoll.c 2006-11-08 15:38:31.000000000 +0100 > @@ -1447,7 +1447,7 @@ > &events[eventcnt].events) || > __put_user(epi->event.data, > &events[eventcnt].data)) > - return -EFAULT; > + return eventcnt ? eventcnt : -EFAULT; > if (epi->event.events & EPOLLONESHOT) > epi->event.events &= EP_PRIVATE_BITS; > eventcnt++; > Definitely a better interface, but I wonder if it's too late to change it. An app which does if (epoll_wait(...) == -1) barf(errno); else assume_all_events_were_received(); will now do the wrong thing. otoh, such an applciation basically _has_ to use the epoll_wait() return value to work out how many events it received, so maybe it's OK... - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html