forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
97 lines
2.0 KiB
C
97 lines
2.0 KiB
C
#ifndef _NET_GRO_CELLS_H
|
|
#define _NET_GRO_CELLS_H
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/netdevice.h>
|
|
|
|
struct gro_cell {
|
|
struct sk_buff_head napi_skbs;
|
|
struct napi_struct napi;
|
|
};
|
|
|
|
struct gro_cells {
|
|
struct gro_cell __percpu *cells;
|
|
};
|
|
|
|
static inline int gro_cells_receive(struct gro_cells *gcells, struct sk_buff *skb)
|
|
{
|
|
struct gro_cell *cell;
|
|
struct net_device *dev = skb->dev;
|
|
|
|
if (!gcells->cells || skb_cloned(skb) || !(dev->features & NETIF_F_GRO))
|
|
return netif_rx(skb);
|
|
|
|
cell = this_cpu_ptr(gcells->cells);
|
|
|
|
if (skb_queue_len(&cell->napi_skbs) > netdev_max_backlog) {
|
|
atomic_long_inc_unchecked(&dev->rx_dropped);
|
|
kfree_skb(skb);
|
|
return NET_RX_DROP;
|
|
}
|
|
|
|
__skb_queue_tail(&cell->napi_skbs, skb);
|
|
if (skb_queue_len(&cell->napi_skbs) == 1)
|
|
napi_schedule(&cell->napi);
|
|
return NET_RX_SUCCESS;
|
|
}
|
|
|
|
/* called under BH context */
|
|
static inline int gro_cell_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct gro_cell *cell = container_of(napi, struct gro_cell, napi);
|
|
struct sk_buff *skb;
|
|
int work_done = 0;
|
|
|
|
while (work_done < budget) {
|
|
skb = __skb_dequeue(&cell->napi_skbs);
|
|
if (!skb)
|
|
break;
|
|
napi_gro_receive(napi, skb);
|
|
work_done++;
|
|
}
|
|
|
|
if (work_done < budget)
|
|
napi_complete_done(napi, work_done);
|
|
return work_done;
|
|
}
|
|
|
|
static inline int gro_cells_init(struct gro_cells *gcells, struct net_device *dev)
|
|
{
|
|
int i;
|
|
|
|
gcells->cells = alloc_percpu(struct gro_cell);
|
|
if (!gcells->cells)
|
|
return -ENOMEM;
|
|
|
|
for_each_possible_cpu(i) {
|
|
struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
|
|
|
|
__skb_queue_head_init(&cell->napi_skbs);
|
|
|
|
set_bit(NAPI_STATE_NO_BUSY_POLL, &cell->napi.state);
|
|
|
|
netif_napi_add(dev, &cell->napi, gro_cell_poll, 64);
|
|
napi_enable(&cell->napi);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void gro_cells_destroy(struct gro_cells *gcells)
|
|
{
|
|
int i;
|
|
|
|
if (!gcells->cells)
|
|
return;
|
|
for_each_possible_cpu(i) {
|
|
struct gro_cell *cell = per_cpu_ptr(gcells->cells, i);
|
|
|
|
netif_napi_del(&cell->napi);
|
|
__skb_queue_purge(&cell->napi_skbs);
|
|
}
|
|
free_percpu(gcells->cells);
|
|
gcells->cells = NULL;
|
|
}
|
|
|
|
#endif
|