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authorJeff Dike <jdike@addtoit.com>2007-10-16 01:27:31 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:08 -0700
commitb53f35a8093e6aed7e8e880eaa0b89a3d2fdfb0a (patch)
tree50e19688753650e27b1f7fc1d48eb8683666e6b7 /arch/um/drivers/vde_user.c
parentcd1ae0e49bdd814cfaa2e5ab28cff21a30e20085 (diff)
uml: network driver MTU cleanups
A bunch of MTU-related cleanups in the network code. First, there is the addition of the notion of a maximally-sized packet, which is the MTU plus headers. This is used to size the skb that will receive a packet. This allows ether_adjust_skb to go away, as it was used to resize the skb after it was allocated. Since the skb passed into the low-level read routine is no longer resized, and possibly reallocated, there, they (and the write routines) don't need to get an sk_buff **. They just need the sk_buff * now. The callers of ether_adjust_skb still need to do the skb_put, so that's now inlined. The MAX_PACKET definitions in most of the drivers are gone. The set_mtu methods were all the same and did nothing, so they can be removed. The ethertap driver had a typo which doubled the size of the packet rather than adding two bytes to it. It also wasn't defining its setup_size, causing a zero-byte kmalloc and crash when the invalid pointer returned from kmalloc was dereferenced. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/drivers/vde_user.c')
-rw-r--r--arch/um/drivers/vde_user.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/arch/um/drivers/vde_user.c b/arch/um/drivers/vde_user.c
index 7533cd3cbba4..d9941fe5f931 100644
--- a/arch/um/drivers/vde_user.c
+++ b/arch/um/drivers/vde_user.c
@@ -12,8 +12,6 @@
#include "user.h"
#include "vde.h"
-#define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
-
static int vde_user_init(void *data, void *dev)
{
struct vde_data *pri = data;
@@ -65,20 +63,15 @@ static void vde_remove(void *data)
printk(UM_KERN_WARNING "vde_remove - we have no VDECONN to remove");
}
-static int vde_set_mtu(int mtu, void *data)
-{
- return mtu;
-}
-
const struct net_user_info vde_user_info = {
.init = vde_user_init,
.open = vde_user_open,
.close = NULL,
.remove = vde_remove,
- .set_mtu = vde_set_mtu,
.add_address = NULL,
.delete_address = NULL,
- .max_packet = MAX_PACKET - ETH_HEADER_OTHER
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
};
void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init)