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Date: Wed, 25 Jan 2012 09:43:15 +0100 (CET) From: Stefan Gula <steweg@...t.sk> To: "David S. Miller" <davem@...emloft.net> Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [patch v1, kernel 3.2.1] RTNETLINK adjusting values of min_ifinfo_dump_size From: Stefan Gula <steweg@...il.com> This patch extends the rtnetlink.c. The problem is that calcit, which returns the value min_ifinfo_dump_size, is called without ability to get device info as well (struct net_device *dev is not accessible from it). This create a problem if required size of struct sk_buff *skb is not enough big to comply with all data returned by fill_info function for the interface that required size can vary over time, e.g. some dynamic structures will be putted to skb like hlists or lists. To do this patch extends the do_setlink function with recalculating of min_ifinfo_dump_size accordingly to device type and get_size functions. Signed-off-by: Stefan Gula <steweg@...il.com> --- code needed to be ok before I can resubmit my macvlan source mode patch --- linux-3.2.1-orig/net/core/rtnetlink.c 2012-01-12 20:42:45.000000000 +0100 +++ linux/net/core/rtnetlink.c 2012-01-24 14:26:58.083219352 +0100 @@ -1506,6 +1506,9 @@ errout: if (send_addr_notify) call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); + min_ifinfo_dump_size = max_t(u16, if_nlmsg_size(dev), + min_ifinfo_dump_size); + return err; } -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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