diff options
| author |   Magnus Karlsson <magnus.karlsson@intel.com> | 2018-06-04 14:05:57 +0200 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2018-06-05 15:48:34 +0200 |
| commit | ac98d8aab61baf785eb8f099b36daf34fc76a70e (patch) | |
| tree | c0fa347892f50786cd516e5eb4396abf69bebb0d /net/xdp/xdp_umem.c | |
| parent | net: added netdevice operation for Tx (diff) | |
| download | linux-dev-ac98d8aab61baf785eb8f099b36daf34fc76a70e.tar.xz linux-dev-ac98d8aab61baf785eb8f099b36daf34fc76a70e.zip | |
xsk: wire upp Tx zero-copy functions
Here we add the functionality required to support zero-copy Tx, and
also exposes various zero-copy related functions for the netdevs.
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/xdp/xdp_umem.c')
| -rw-r--r-- | net/xdp/xdp_umem.c | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c index f729d79b8d91..7eb4948a38d2 100644 --- a/net/xdp/xdp_umem.c +++ b/net/xdp/xdp_umem.c @@ -17,6 +17,29 @@ #define XDP_UMEM_MIN_CHUNK_SIZE 2048 +void xdp_add_sk_umem(struct xdp_umem *umem, struct xdp_sock *xs) +{ + unsigned long flags; + + spin_lock_irqsave(&umem->xsk_list_lock, flags); + list_add_rcu(&xs->list, &umem->xsk_list); + spin_unlock_irqrestore(&umem->xsk_list_lock, flags); +} + +void xdp_del_sk_umem(struct xdp_umem *umem, struct xdp_sock *xs) +{ + unsigned long flags; + + if (xs->dev) { + spin_lock_irqsave(&umem->xsk_list_lock, flags); + list_del_rcu(&xs->list); + spin_unlock_irqrestore(&umem->xsk_list_lock, flags); + + if (umem->zc) + synchronize_net(); + } +} + int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev, u32 queue_id, u16 flags) { @@ -35,7 +58,7 @@ int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev, dev_hold(dev); - if (dev->netdev_ops->ndo_bpf) { + if (dev->netdev_ops->ndo_bpf && dev->netdev_ops->ndo_xsk_async_xmit) { bpf.command = XDP_QUERY_XSK_UMEM; rtnl_lock(); @@ -70,7 +93,7 @@ int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev, return force_zc ? -ENOTSUPP : 0; /* fail or fallback */ } -void xdp_umem_clear_dev(struct xdp_umem *umem) +static void xdp_umem_clear_dev(struct xdp_umem *umem) { struct netdev_bpf bpf; int err; @@ -283,6 +306,8 @@ static int xdp_umem_reg(struct xdp_umem *umem, struct xdp_umem_reg *mr) umem->npgs = size / PAGE_SIZE; umem->pgs = NULL; umem->user = NULL; + INIT_LIST_HEAD(&umem->xsk_list); + spin_lock_init(&umem->xsk_list_lock); refcount_set(&umem->users, 1); |