From: Asias He Date: Mon, 6 May 2013 08:38:24 +0000 (+0800) Subject: vhost-net: Cleanup vhost_ubuf and vhost_zcopy X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=fe729a57c8d85b6b38d62b64215d5f064e682940;p=linux-beck.git vhost-net: Cleanup vhost_ubuf and vhost_zcopy - Rename vhost_ubuf to vhost_net_ubuf - Rename vhost_zcopy_mask to vhost_net_zcopy_mask - Make funcs static Signed-off-by: Asias He Signed-off-by: Michael S. Tsirkin --- diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index 06b2447bce71..2b51e2336aa2 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -70,7 +70,7 @@ enum { VHOST_NET_VQ_MAX = 2, }; -struct vhost_ubuf_ref { +struct vhost_net_ubuf_ref { struct kref kref; wait_queue_head_t wait; struct vhost_virtqueue *vq; @@ -93,7 +93,7 @@ struct vhost_net_virtqueue { struct ubuf_info *ubuf_info; /* Reference counting for outstanding ubufs. * Protected by vq mutex. Writers must also take device mutex. */ - struct vhost_ubuf_ref *ubufs; + struct vhost_net_ubuf_ref *ubufs; }; struct vhost_net { @@ -110,24 +110,25 @@ struct vhost_net { bool tx_flush; }; -static unsigned vhost_zcopy_mask __read_mostly; +static unsigned vhost_net_zcopy_mask __read_mostly; -void vhost_enable_zcopy(int vq) +static void vhost_net_enable_zcopy(int vq) { - vhost_zcopy_mask |= 0x1 << vq; + vhost_net_zcopy_mask |= 0x1 << vq; } -static void vhost_zerocopy_done_signal(struct kref *kref) +static void vhost_net_zerocopy_done_signal(struct kref *kref) { - struct vhost_ubuf_ref *ubufs = container_of(kref, struct vhost_ubuf_ref, - kref); + struct vhost_net_ubuf_ref *ubufs; + + ubufs = container_of(kref, struct vhost_net_ubuf_ref, kref); wake_up(&ubufs->wait); } -struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq, - bool zcopy) +static struct vhost_net_ubuf_ref * +vhost_net_ubuf_alloc(struct vhost_virtqueue *vq, bool zcopy) { - struct vhost_ubuf_ref *ubufs; + struct vhost_net_ubuf_ref *ubufs; /* No zero copy backend? Nothing to count. */ if (!zcopy) return NULL; @@ -140,14 +141,14 @@ struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq, return ubufs; } -void vhost_ubuf_put(struct vhost_ubuf_ref *ubufs) +static void vhost_net_ubuf_put(struct vhost_net_ubuf_ref *ubufs) { - kref_put(&ubufs->kref, vhost_zerocopy_done_signal); + kref_put(&ubufs->kref, vhost_net_zerocopy_done_signal); } -void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *ubufs) +static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs) { - kref_put(&ubufs->kref, vhost_zerocopy_done_signal); + kref_put(&ubufs->kref, vhost_net_zerocopy_done_signal); wait_event(ubufs->wait, !atomic_read(&ubufs->kref.refcount)); kfree(ubufs); } @@ -159,7 +160,7 @@ static void vhost_net_clear_ubuf_info(struct vhost_net *n) int i; for (i = 0; i < n->dev.nvqs; ++i) { - zcopy = vhost_zcopy_mask & (0x1 << i); + zcopy = vhost_net_zcopy_mask & (0x1 << i); if (zcopy) kfree(n->vqs[i].ubuf_info); } @@ -171,7 +172,7 @@ int vhost_net_set_ubuf_info(struct vhost_net *n) int i; for (i = 0; i < n->dev.nvqs; ++i) { - zcopy = vhost_zcopy_mask & (0x1 << i); + zcopy = vhost_net_zcopy_mask & (0x1 << i); if (!zcopy) continue; n->vqs[i].ubuf_info = kmalloc(sizeof(*n->vqs[i].ubuf_info) * @@ -183,7 +184,7 @@ int vhost_net_set_ubuf_info(struct vhost_net *n) err: while (i--) { - zcopy = vhost_zcopy_mask & (0x1 << i); + zcopy = vhost_net_zcopy_mask & (0x1 << i); if (!zcopy) continue; kfree(n->vqs[i].ubuf_info); @@ -305,7 +306,7 @@ static int vhost_zerocopy_signal_used(struct vhost_net *net, static void vhost_zerocopy_callback(struct ubuf_info *ubuf, bool success) { - struct vhost_ubuf_ref *ubufs = ubuf->ctx; + struct vhost_net_ubuf_ref *ubufs = ubuf->ctx; struct vhost_virtqueue *vq = ubufs->vq; int cnt = atomic_read(&ubufs->kref.refcount); @@ -322,7 +323,7 @@ static void vhost_zerocopy_callback(struct ubuf_info *ubuf, bool success) /* set len to mark this desc buffers done DMA */ vq->heads[ubuf->desc].len = success ? VHOST_DMA_DONE_LEN : VHOST_DMA_FAILED_LEN; - vhost_ubuf_put(ubufs); + vhost_net_ubuf_put(ubufs); } /* Expects to be always run from workqueue - which acts as @@ -345,7 +346,7 @@ static void handle_tx(struct vhost_net *net) int err; size_t hdr_size; struct socket *sock; - struct vhost_ubuf_ref *uninitialized_var(ubufs); + struct vhost_net_ubuf_ref *uninitialized_var(ubufs); bool zcopy, zcopy_used; /* TODO: check that we are running from vhost_worker? */ @@ -441,7 +442,7 @@ static void handle_tx(struct vhost_net *net) if (unlikely(err < 0)) { if (zcopy_used) { if (ubufs) - vhost_ubuf_put(ubufs); + vhost_net_ubuf_put(ubufs); nvq->upend_idx = ((unsigned)nvq->upend_idx - 1) % UIO_MAXIOV; } @@ -795,7 +796,7 @@ static void vhost_net_flush(struct vhost_net *n) n->tx_flush = true; mutex_unlock(&n->vqs[VHOST_NET_VQ_TX].vq.mutex); /* Wait for all lower device DMAs done. */ - vhost_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs); + vhost_net_ubuf_put_and_wait(n->vqs[VHOST_NET_VQ_TX].ubufs); mutex_lock(&n->vqs[VHOST_NET_VQ_TX].vq.mutex); n->tx_flush = false; kref_init(&n->vqs[VHOST_NET_VQ_TX].ubufs->kref); @@ -896,7 +897,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) struct socket *sock, *oldsock; struct vhost_virtqueue *vq; struct vhost_net_virtqueue *nvq; - struct vhost_ubuf_ref *ubufs, *oldubufs = NULL; + struct vhost_net_ubuf_ref *ubufs, *oldubufs = NULL; int r; mutex_lock(&n->dev.mutex); @@ -927,7 +928,8 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) oldsock = rcu_dereference_protected(vq->private_data, lockdep_is_held(&vq->mutex)); if (sock != oldsock) { - ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock)); + ubufs = vhost_net_ubuf_alloc(vq, + sock && vhost_sock_zcopy(sock)); if (IS_ERR(ubufs)) { r = PTR_ERR(ubufs); goto err_ubufs; @@ -953,7 +955,7 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd) mutex_unlock(&vq->mutex); if (oldubufs) { - vhost_ubuf_put_and_wait(oldubufs); + vhost_net_ubuf_put_and_wait(oldubufs); mutex_lock(&vq->mutex); vhost_zerocopy_signal_used(n, vq); mutex_unlock(&vq->mutex); @@ -971,7 +973,7 @@ err_used: rcu_assign_pointer(vq->private_data, oldsock); vhost_net_enable_vq(n, vq); if (ubufs) - vhost_ubuf_put_and_wait(ubufs); + vhost_net_ubuf_put_and_wait(ubufs); err_ubufs: fput(sock->file); err_vq: @@ -1133,7 +1135,7 @@ static struct miscdevice vhost_net_misc = { static int vhost_net_init(void) { if (experimental_zcopytx) - vhost_enable_zcopy(VHOST_NET_VQ_TX); + vhost_net_enable_zcopy(VHOST_NET_VQ_TX); return misc_register(&vhost_net_misc); } module_init(vhost_net_init);