Daniel Borkmann says:
====================
pull-request: bpf 2020-11-28
1) Do not reference the skb for xsk's generic TX side since when looped
back into RX it might crash in generic XDP, from Björn Töpel.
2) Fix umem cleanup on a partially set up xsk socket when being destroyed,
from Magnus Karlsson.
3) Fix an incorrect netdev reference count when failing xsk_bind() operation,
from Marek Majtyka.
4) Fix bpftool to set an error code on failed calloc() in build_btf_type_table(),
from Zhen Lei.
* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf: Add MAINTAINERS entry for BPF LSM
bpftool: Fix error return value in build_btf_type_table
net, xsk: Avoid taking multiple skbuff references
xsk: Fix incorrect netdev reference count
xsk: Fix umem cleanup bug at socket destruct
MAINTAINERS: Update XDP and AF_XDP entries
====================
Link: https://lore.kernel.org/r/20201128005104.1205-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
F: arch/x86/net/
X: arch/x86/net/bpf_jit_comp32.c
+BPF LSM (Security Audit and Enforcement using BPF)
+M: KP Singh <kpsingh@chromium.org>
+R: Florent Revest <revest@chromium.org>
+R: Brendan Jackman <jackmanb@chromium.org>
+L: bpf@vger.kernel.org
+S: Maintained
+F: Documentation/bpf/bpf_lsm.rst
+F: include/linux/bpf_lsm.h
+F: kernel/bpf/bpf_lsm.c
+F: security/bpf/
+
BROADCOM B44 10/100 ETHERNET DRIVER
M: Michael Chan <michael.chan@broadcom.com>
L: netdev@vger.kernel.org
L: bpf@vger.kernel.org
S: Supported
F: include/net/xdp.h
+F: include/net/xdp_priv.h
F: include/trace/events/xdp.h
F: kernel/bpf/cpumap.c
F: kernel/bpf/devmap.c
F: net/core/xdp.c
-N: xdp
-K: xdp
+F: samples/bpf/xdp*
+F: tools/testing/selftests/bpf/*xdp*
+F: tools/testing/selftests/bpf/*/*xdp*
+F: drivers/net/ethernet/*/*/*/*/*xdp*
+F: drivers/net/ethernet/*/*/*xdp*
+K: (?:\b|_)xdp(?:\b|_)
XDP SOCKETS (AF_XDP)
M: Björn Töpel <bjorn.topel@intel.com>
L: netdev@vger.kernel.org
L: bpf@vger.kernel.org
S: Maintained
+F: Documentation/networking/af_xdp.rst
F: include/net/xdp_sock*
F: include/net/xsk_buff_pool.h
F: include/uapi/linux/if_xdp.h
+F: include/uapi/linux/xdp_diag.h
+F: include/net/netns/xdp.h
F: net/xdp/
F: samples/bpf/xdpsock*
F: tools/lib/bpf/xsk*
struct net_device *sb_dev);
u16 dev_pick_tx_cpu_id(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev);
+
int dev_queue_xmit(struct sk_buff *skb);
int dev_queue_xmit_accel(struct sk_buff *skb, struct net_device *sb_dev);
-int dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
+int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id);
+
+static inline int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
+{
+ int ret;
+
+ ret = __dev_direct_xmit(skb, queue_id);
+ if (!dev_xmit_complete(ret))
+ kfree_skb(skb);
+ return ret;
+}
+
int register_netdevice(struct net_device *dev);
void unregister_netdevice_queue(struct net_device *dev, struct list_head *head);
void unregister_netdevice_many(struct list_head *head);
struct page **pgs;
int id;
struct list_head xsk_dma_list;
+ struct work_struct work;
};
struct xsk_map {
}
EXPORT_SYMBOL(dev_queue_xmit_accel);
-int dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
+int __dev_direct_xmit(struct sk_buff *skb, u16 queue_id)
{
struct net_device *dev = skb->dev;
struct sk_buff *orig_skb = skb;
dev_xmit_recursion_dec();
local_bh_enable();
-
- if (!dev_xmit_complete(ret))
- kfree_skb(skb);
-
return ret;
drop:
atomic_long_inc(&dev->tx_dropped);
kfree_skb_list(skb);
return NET_XMIT_DROP;
}
-EXPORT_SYMBOL(dev_direct_xmit);
+EXPORT_SYMBOL(__dev_direct_xmit);
/*************************************************************************
* Receiver routines
kfree(umem);
}
+static void xdp_umem_release_deferred(struct work_struct *work)
+{
+ struct xdp_umem *umem = container_of(work, struct xdp_umem, work);
+
+ xdp_umem_release(umem);
+}
+
void xdp_get_umem(struct xdp_umem *umem)
{
refcount_inc(&umem->users);
}
-void xdp_put_umem(struct xdp_umem *umem)
+void xdp_put_umem(struct xdp_umem *umem, bool defer_cleanup)
{
if (!umem)
return;
- if (refcount_dec_and_test(&umem->users))
- xdp_umem_release(umem);
+ if (refcount_dec_and_test(&umem->users)) {
+ if (defer_cleanup) {
+ INIT_WORK(&umem->work, xdp_umem_release_deferred);
+ schedule_work(&umem->work);
+ } else {
+ xdp_umem_release(umem);
+ }
+ }
}
static int xdp_umem_pin_pages(struct xdp_umem *umem, unsigned long address)
#include <net/xdp_sock_drv.h>
void xdp_get_umem(struct xdp_umem *umem);
-void xdp_put_umem(struct xdp_umem *umem);
+void xdp_put_umem(struct xdp_umem *umem, bool defer_cleanup);
struct xdp_umem *xdp_umem_create(struct xdp_umem_reg *mr);
#endif /* XDP_UMEM_H_ */
skb_shinfo(skb)->destructor_arg = (void *)(long)desc.addr;
skb->destructor = xsk_destruct_skb;
- /* Hinder dev_direct_xmit from freeing the packet and
- * therefore completing it in the destructor
- */
- refcount_inc(&skb->users);
- err = dev_direct_xmit(skb, xs->queue_id);
+ err = __dev_direct_xmit(skb, xs->queue_id);
if (err == NETDEV_TX_BUSY) {
/* Tell user-space to retry the send */
skb->destructor = sock_wfree;
/* Ignore NET_XMIT_CN as packet might have been sent */
if (err == NET_XMIT_DROP) {
/* SKB completed but not sent */
- kfree_skb(skb);
err = -EBUSY;
goto out;
}
- consume_skb(skb);
sent_frame = true;
}
return;
if (!xp_put_pool(xs->pool))
- xdp_put_umem(xs->umem);
+ xdp_put_umem(xs->umem, !xs->pool);
sk_refcnt_debug_dec(sk);
}
err_unreg_pool:
if (!force_zc)
err = 0; /* fallback to copy mode */
- if (err)
+ if (err) {
xsk_clear_pool_at_qid(netdev, queue_id);
+ dev_put(netdev);
+ }
return err;
}
pool->cq = NULL;
}
- xdp_put_umem(pool->umem);
+ xdp_put_umem(pool->umem, false);
xp_destroy(pool);
}
obj_node = calloc(1, sizeof(*obj_node));
if (!obj_node) {
p_err("failed to allocate memory: %s", strerror(errno));
+ err = -ENOMEM;
goto err_free;
}
projects / linux-2.6-microblaze.git / commitdiff