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Subject[PATCH v12 02/13] net/compat.c,linux/filter.h: share compat_sock_fprog
Date
Any other users of bpf_*_filter that take a struct sock_fprog from
userspace will need to be able to also accept a compat_sock_fprog
if the arch supports compat calls. This change let's the existing
compat_sock_fprog be shared.

Signed-off-by: Will Drewry <wad@chromium.org>

v11: introduction
---
include/linux/filter.h | 11 +++++++++++
net/compat.c | 8 --------
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/include/linux/filter.h b/include/linux/filter.h
index bdd02f9..f052f5c 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -10,6 +10,7 @@

#ifdef __KERNEL__
#include <linux/atomic.h>
+#include <linux/compat.h>
#endif

/*
@@ -135,6 +136,16 @@ struct sock_fprog { /* Required for SO_ATTACH_FILTER. */

#ifdef __KERNEL__

+#ifdef CONFIG_COMPAT
+/*
+ * A struct sock_filter is architecture independent.
+ */
+struct compat_sock_fprog {
+ u16 len;
+ compat_uptr_t filter; /* struct sock_filter * */
+};
+#endif
+
struct sk_buff;
struct sock;

diff --git a/net/compat.c b/net/compat.c
index 73bf0e0..5ba1bdc 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -328,14 +328,6 @@ void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
__scm_destroy(scm);
}

-/*
- * A struct sock_filter is architecture independent.
- */
-struct compat_sock_fprog {
- u16 len;
- compat_uptr_t filter; /* struct sock_filter * */
-};
-
static int do_set_attach_filter(struct socket *sock, int level, int optname,
char __user *optval, unsigned int optlen)
{
--
1.7.5.4


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