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virtio: rename virtqueue_add_buf_gfp to virtqueue_add_buf 

Remove wrapper functions. This makes the allocation type explicit in
all callers; I used GPF_KERNEL where it seemed obvious, left it at
GFP_ATOMIC otherwise.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Rusty Russell 2012-01-12 15:44:42 +10:30
parent 5dfc17628d
commit f96fde41f7
10 changed files with 44 additions and 58 deletions
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2
drivers/block/virtio_blk.c
View File

@ -172,7 +172,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
}
}
if (virtqueue_add_buf(vblk->vq, vblk->sg, out, in, vbr) < 0) {
if (virtqueue_add_buf(vblk->vq, vblk->sg, out, in, vbr, GFP_ATOMIC)<0) {
mempool_free(vbr, vblk->pool);
return false;
}

2
drivers/char/hw_random/virtio-rng.c
View File

@ -47,7 +47,7 @@ static void register_buffer(u8 *buf, size_t size)
sg_init_one(&sg, buf, size);
/* There should always be room for one buffer. */
if (virtqueue_add_buf(vq, &sg, 0, 1, buf) < 0)
if (virtqueue_add_buf(vq, &sg, 0, 1, buf, GFP_KERNEL) < 0)
BUG();
virtqueue_kick(vq);

6
drivers/char/virtio_console.c
View File

@ -392,7 +392,7 @@ static int add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
sg_init_one(sg, buf->buf, buf->size);
ret = virtqueue_add_buf(vq, sg, 0, 1, buf);
ret = virtqueue_add_buf(vq, sg, 0, 1, buf, GFP_ATOMIC);
virtqueue_kick(vq);
return ret;
}
@ -457,7 +457,7 @@ static ssize_t __send_control_msg(struct ports_device *portdev, u32 port_id,
vq = portdev->c_ovq;
sg_init_one(sg, &cpkt, sizeof(cpkt));
if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt, GFP_ATOMIC) >= 0) {
virtqueue_kick(vq);
while (!virtqueue_get_buf(vq, &len))
cpu_relax();
@ -506,7 +506,7 @@ static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count,
reclaim_consumed_buffers(port);
sg_init_one(sg, in_buf, in_count);
ret = virtqueue_add_buf(out_vq, sg, 1, 0, in_buf);
ret = virtqueue_add_buf(out_vq, sg, 1, 0, in_buf, GFP_ATOMIC);
/* Tell Host to go! */
virtqueue_kick(out_vq);

12
drivers/net/virtio_net.c
View File

@ -370,7 +370,7 @@ static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
skb_to_sgvec(skb, vi->rx_sg + 1, 0, skb->len);
err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 2, skb, gfp);
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, 2, skb, gfp);
if (err < 0)
dev_kfree_skb(skb);
@ -415,8 +415,8 @@ static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp)
/* chain first in list head */
first->private = (unsigned long)list;
err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2,
first, gfp);
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2,
first, gfp);
if (err < 0)
give_pages(vi, first);
@ -434,7 +434,7 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
sg_init_one(vi->rx_sg, page_address(page), PAGE_SIZE);
err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 1, page, gfp);
err = virtqueue_add_buf(vi->rvq, vi->rx_sg, 0, 1, page, gfp);
if (err < 0)
give_pages(vi, page);
@ -609,7 +609,7 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
hdr->num_sg = skb_to_sgvec(skb, vi->tx_sg + 1, 0, skb->len) + 1;
return virtqueue_add_buf(vi->svq, vi->tx_sg, hdr->num_sg,
0, skb);
0, skb, GFP_ATOMIC);
}
static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
@ -767,7 +767,7 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
sg_set_buf(&sg[i + 1], sg_virt(s), s->length);
sg_set_buf(&sg[out + in - 1], &status, sizeof(status));
BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi) < 0);
BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi, GFP_ATOMIC) < 0);
virtqueue_kick(vi->cvq);

7
drivers/virtio/virtio_balloon.c
View File

@ -88,7 +88,7 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq)
init_completion(&vb->acked);
/* We should always be able to add one buffer to an empty queue. */
if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
if (virtqueue_add_buf(vq, &sg, 1, 0, vb, GFP_KERNEL) < 0)
BUG();
virtqueue_kick(vq);
@ -220,7 +220,7 @@ static void stats_handle_request(struct virtio_balloon *vb)
vq = vb->stats_vq;
sg_init_one(&sg, vb->stats, sizeof(vb->stats));
if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
if (virtqueue_add_buf(vq, &sg, 1, 0, vb, GFP_KERNEL) < 0)
BUG();
virtqueue_kick(vq);
}
@ -313,7 +313,8 @@ static int virtballoon_probe(struct virtio_device *vdev)
* use it to signal us later.
*/
sg_init_one(&sg, vb->stats, sizeof vb->stats);
if (virtqueue_add_buf(vb->stats_vq, &sg, 1, 0, vb) < 0)
if (virtqueue_add_buf(vb->stats_vq, &sg, 1, 0, vb, GFP_KERNEL)
< 0)
BUG();
virtqueue_kick(vb->stats_vq);
}

22
drivers/virtio/virtio_ring.c
View File

@ -167,7 +167,7 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
}
/**
* virtqueue_add_buf_gfp - expose buffer to other end
* virtqueue_add_buf - expose buffer to other end
* @vq: the struct virtqueue we're talking about.
* @sg: the description of the buffer(s).
* @out_num: the number of sg readable by other side
@ -183,12 +183,12 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
* positive return values as "available": indirect buffers mean that
* we can put an entire sg[] array inside a single queue entry.
*/
int virtqueue_add_buf_gfp(struct virtqueue *_vq,
struct scatterlist sg[],
unsigned int out,
unsigned int in,
void *data,
gfp_t gfp)
int virtqueue_add_buf(struct virtqueue *_vq,
struct scatterlist sg[],
unsigned int out,
unsigned int in,
void *data,
gfp_t gfp)
{
struct vring_virtqueue *vq = to_vvq(_vq);
unsigned int i, avail, uninitialized_var(prev);
@ -259,13 +259,13 @@ add_head:
return vq->num_free;
}
EXPORT_SYMBOL_GPL(virtqueue_add_buf_gfp);
EXPORT_SYMBOL_GPL(virtqueue_add_buf);
/**
* virtqueue_kick - update after add_buf
* @vq: the struct virtqueue
*
* After one or more virtqueue_add_buf_gfp calls, invoke this to kick
* After one or more virtqueue_add_buf calls, invoke this to kick
* the other side.
*
* Caller must ensure we don't call this with other virtqueue
@ -341,7 +341,7 @@ static inline bool more_used(const struct vring_virtqueue *vq)
* operations at the same time (except where noted).
*
* Returns NULL if there are no used buffers, or the "data" token
* handed to virtqueue_add_buf_gfp().
* handed to virtqueue_add_buf().
*/
void *virtqueue_get_buf(struct virtqueue *_vq, unsigned int *len)
{
@ -490,7 +490,7 @@ EXPORT_SYMBOL_GPL(virtqueue_enable_cb_delayed);
* virtqueue_detach_unused_buf - detach first unused buffer
* @vq: the struct virtqueue we're talking about.
*
* Returns NULL or the "data" token handed to virtqueue_add_buf_gfp().
* Returns NULL or the "data" token handed to virtqueue_add_buf().
* This is not valid on an active queue; it is useful only for device
* shutdown.
*/

21
include/linux/virtio.h
View File

@ -25,21 +25,12 @@ struct virtqueue {
void *priv;
};
int virtqueue_add_buf_gfp(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data,
gfp_t gfp);
static inline int virtqueue_add_buf(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data)
{
return virtqueue_add_buf_gfp(vq, sg, out_num, in_num, data, GFP_ATOMIC);
}
int virtqueue_add_buf(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data,
gfp_t gfp);
void virtqueue_kick(struct virtqueue *vq);

6
net/9p/trans_virtio.c
View File

@ -272,7 +272,8 @@ req_retry:
in = pack_sg_list(chan->sg, out,
VIRTQUEUE_NUM, req->rc->sdata, req->rc->capacity);
err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);
err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc,
GFP_ATOMIC);
if (err < 0) {
if (err == -ENOSPC) {
chan->ring_bufs_avail = 0;
@ -414,7 +415,8 @@ req_retry_pinned:
in += pack_sg_list_p(chan->sg, out + in, VIRTQUEUE_NUM,
in_pages, in_nr_pages, uidata, inlen);
err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);
err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc,
GFP_ATOMIC);
if (err < 0) {
if (err == -ENOSPC) {
chan->ring_bufs_avail = 0;

21
tools/virtio/linux/virtio.h
View File

@ -186,21 +186,12 @@ struct virtqueue {
#endif
/* Interfaces exported by virtio_ring. */
int virtqueue_add_buf_gfp(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data,
gfp_t gfp);
static inline int virtqueue_add_buf(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data)
{
return virtqueue_add_buf_gfp(vq, sg, out_num, in_num, data, GFP_ATOMIC);
}
int virtqueue_add_buf(struct virtqueue *vq,
struct scatterlist sg[],
unsigned int out_num,
unsigned int in_num,
void *data,
gfp_t gfp);
void virtqueue_kick(struct virtqueue *vq);

3
tools/virtio/virtio_test.c
View File

@ -161,7 +161,8 @@ static void run_test(struct vdev_info *dev, struct vq_info *vq, int bufs)
if (started < bufs) {
sg_init_one(&sl, dev->buf, dev->buf_size);
r = virtqueue_add_buf(vq->vq, &sl, 1, 0,
dev->buf + started);
dev->buf + started,
GFP_ATOMIC);
if (likely(r >= 0)) {
++started;
virtqueue_kick(vq->vq);