On Sat, 26 Jan 2008 01:00:34 +0200 "Alon Bar-Lev" <[EMAIL PROTECTED]> wrote:
> Hello, > > When executing the following command using unprivileged users there is > an infinite loop... > /sbin/ip route flush dev eth1 > > Execution with -s produces: > *** Round 28153, deleting 2 entries *** > > *** Round 28154, deleting 2 entries *** > > *** Round 28155, deleting 2 entries *** > > *** Round 28156, deleting 2 entries *** > > *** Round 28157, deleting 2 entries *** > > *** Round 28158, deleting 2 entries *** > > *** Round 28159, deleting 2 entries *** > > I do not fully understand the sequence, but it may be kernel fault, as > it should have returned EPERM for this request stopping the netlink > request. > > Anyway... A simple solution is to store the filter.flushed and fail if > it keeps its value during loop iteration at > ip/ipaddress.c::ipaddr_list_or_flush(), but this is only a > workaround... > > Please CC as I am not in netdev list. > Thanks! > Alon. The issue is that iproute is just blindly sending the deletes and not asking for acknowledgment status. Here is a trivial patch to iproute to fix that, but the problem is that it means it will slow down bulk removal. Maybe it should just check the first, or last delete to see if there are errors? diff --git a/ip/iproute.c b/ip/iproute.c index 7a885b0..b2ae879 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -112,11 +112,27 @@ static struct static int flush_update(void) { + unsigned long i; + struct nlmsghdr *fn; + +#ifdef nochecking if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) { perror("Failed to send flush request\n"); return -1; } +#else + for (i = 0; i < filter.flushp; ) { + fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(i)); + fn->nlmsg_flags |= NLM_F_ACK; + + if (rtnl_talk(&rth, fn, 0, 0, NULL, NULL, NULL) < 0) + return -1; + + i = (((char*)fn) + fn->nlmsg_len) - filter.flushb; + } +#endif filter.flushp = 0; + return 0; } -- Stephen Hemminger <[EMAIL PROTECTED]> -- 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