tools headers UAPI: Sync linux/in.h copy with the kernel sources

To pick the changes in:

  db243b796439c0ca ("net/ipv4/ipv6: Replace one-element arraya with flexible-array members")
  2d3e5caf96b9449a ("net/ipv4: Replace one-element array with flexible-array member")

That don't result in any change in tooling, the structs changed remains
with the same layout.

This addresses this build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs from latest version at 'include/uapi/linux/in.h'
  diff -u tools/include/uapi/linux/in.h include/uapi/linux/in.h

Cc: David S. Miller <davem@davemloft.net>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/include/uapi/linux/in.h b/tools/include/uapi/linux/in.h
index d1b3270..1416822 100644 (file)
--- a/tools/include/uapi/linux/in.h
+++ b/tools/include/uapi/linux/in.h
@@ -188,11 +188,22 @@ struct ip_mreq_source {
 };
 
 struct ip_msfilter {
-       __be32          imsf_multiaddr;
-       __be32          imsf_interface;
-       __u32           imsf_fmode;
-       __u32           imsf_numsrc;
-       __be32          imsf_slist[1];
+       union {
+               struct {
+                       __be32          imsf_multiaddr_aux;
+                       __be32          imsf_interface_aux;
+                       __u32           imsf_fmode_aux;
+                       __u32           imsf_numsrc_aux;
+                       __be32          imsf_slist[1];
+               };
+               struct {
+                       __be32          imsf_multiaddr;
+                       __be32          imsf_interface;
+                       __u32           imsf_fmode;
+                       __u32           imsf_numsrc;
+                       __be32          imsf_slist_flex[];
+               };
+       };
 };
 
 #define IP_MSFILTER_SIZE(numsrc) \
@@ -211,11 +222,22 @@ struct group_source_req {
 };
 
 struct group_filter {
-       __u32                            gf_interface;  /* interface index */
-       struct __kernel_sockaddr_storage gf_group;      /* multicast address */
-       __u32                            gf_fmode;      /* filter mode */
-       __u32                            gf_numsrc;     /* number of sources */
-       struct __kernel_sockaddr_storage gf_slist[1];   /* interface index */
+       union {
+               struct {
+                       __u32                            gf_interface_aux; /* interface index */
+                       struct __kernel_sockaddr_storage gf_group_aux;     /* multicast address */
+                       __u32                            gf_fmode_aux;     /* filter mode */
+                       __u32                            gf_numsrc_aux;    /* number of sources */
+                       struct __kernel_sockaddr_storage gf_slist[1];      /* interface index */
+               };
+               struct {
+                       __u32                            gf_interface;    /* interface index */
+                       struct __kernel_sockaddr_storage gf_group;        /* multicast address */
+                       __u32                            gf_fmode;        /* filter mode */
+                       __u32                            gf_numsrc;       /* number of sources */
+                       struct __kernel_sockaddr_storage gf_slist_flex[]; /* interface index */
+               };
+       };
 };
 
 #define GROUP_FILTER_SIZE(numsrc) \