Attachment 888683 Details for Bug 1089836 – Draft workaround implementation patch

[patch] Draft workaround implementation patch

glibc-rh1089836.patch (text/plain), 1.29 KB, created by David Gibson on 2014-04-23 00:07:11 UTC

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Creator: David Gibson

Created: 2014-04-23 00:07:11 UTC

Size: 1.29 KB

patch

obsolete

>Only in glibc-2.12-2-gc4ccff1: config.log
>diff -ur glibc-2.12-2-gc4ccff1.orig/sysdeps/unix/sysv/linux/ifaddrs.c glibc-2.12-2-gc4ccff1/sysdeps/unix/sysv/linux/ifaddrs.c
>--- glibc-2.12-2-gc4ccff1.orig/sysdeps/unix/sysv/linux/ifaddrs.c	2010-05-04 21:27:23.000000000 +1000
>+++ glibc-2.12-2-gc4ccff1/sysdeps/unix/sysv/linux/ifaddrs.c	2014-04-22 14:52:04.069892067 +1000
>@@ -110,6 +110,8 @@
>   {
>     struct nlmsghdr nlh;
>     struct rtgenmsg g;
>+    struct rtattr a;
>+    uint32_t ext_mask;
>     char pad[0];
>   } req;
>   struct sockaddr_nl nladdr;
>@@ -123,6 +125,16 @@
>   req.nlh.nlmsg_pid = 0;
>   req.nlh.nlmsg_seq = h->seq;
>   req.g.rtgen_family = AF_UNSPEC;
>+  req.a.rta_len = sizeof(struct rtattr) + sizeof(uint32_t);
>+  /*
>+   * Some kernel versions have a bug where with certain hardware, in
>+   * certain configurations interfaces can be omitted due to running
>+   * out of space in the internal packet buffer.  Specifying an
>+   * IFLA_EXT_MASK attribute (even 0) causes the kernel to properly
>+   * calculate the required packet size, working around the problem.
>+   */
>+  req.a.rta_type = IFLA_EXT_MASK;
>+  req.ext_mask = 0;
>   if (sizeof (req) != offsetof (struct req, pad))
>     memset (req.pad, '\0', sizeof (req) - offsetof (struct req, pad));
> 
>Only in glibc-2.12-2-gc4ccff1/sysdeps/unix/sysv/linux: ifaddrs.c~

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Attachments on bug 1089836: 888683