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xsk: add id to umem 

This commit adds an id to the umem structure. The id uniquely
identifies a umem instance, and will be exposed to user-space via the
socket monitoring interface.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
hifive-unleashed-5.1
Björn Töpel 2019-01-24 19:59:38 +01:00 committed by Daniel Borkmann
parent 1d0dc06930
commit 50e74c0131
2 changed files with 14 additions and 0 deletions
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1
include/net/xdp_sock.h
View File

@ -42,6 +42,7 @@ struct xdp_umem {
struct work_struct work;
struct page **pgs;
u32 npgs;
int id;
struct net_device *dev;
struct xdp_umem_fq_reuse *fq_reuse;
u16 queue_id;

13
net/xdp/xdp_umem.c
View File

@ -13,12 +13,15 @@
#include <linux/mm.h>
#include <linux/netdevice.h>
#include <linux/rtnetlink.h>
#include <linux/idr.h>
#include "xdp_umem.h"
#include "xsk_queue.h"
#define XDP_UMEM_MIN_CHUNK_SIZE 2048
static DEFINE_IDA(umem_ida);
void xdp_add_sk_umem(struct xdp_umem *umem, struct xdp_sock *xs)
{
unsigned long flags;
@ -183,6 +186,8 @@ static void xdp_umem_release(struct xdp_umem *umem)
xdp_umem_clear_dev(umem);
ida_simple_remove(&umem_ida, umem->id);
if (umem->fq) {
xskq_destroy(umem->fq);
umem->fq = NULL;
@ -389,8 +394,16 @@ struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr)
if (!umem)
return ERR_PTR(-ENOMEM);
err = ida_simple_get(&umem_ida, 0, 0, GFP_KERNEL);
if (err < 0) {
kfree(umem);
return ERR_PTR(err);
}
umem->id = err;
err = xdp_umem_reg(umem, mr);
if (err) {
ida_simple_remove(&umem_ida, umem->id);
kfree(umem);
return ERR_PTR(err);
}