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Date: Thu, 3 Apr 2014 08:08:03 +0000
From: Paul Durrant <Paul.Durrant@...rix.com>
To: Zoltan Kiss <zoltan.kiss@...rix.com>,
Ian Campbell <Ian.Campbell@...rix.com>,
Wei Liu <wei.liu2@...rix.com>,
"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Jonathan Davies" <Jonathan.Davies@...rix.com>
Subject: RE: [PATCH net-next v3 1/2] xen-netback: Rename map ops
> -----Original Message-----
> From: Zoltan Kiss
> Sent: 02 April 2014 18:05
> To: Ian Campbell; Wei Liu; xen-devel@...ts.xenproject.org
> Cc: Paul Durrant; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> Jonathan Davies; Zoltan Kiss
> Subject: [PATCH net-next v3 1/2] xen-netback: Rename map ops
>
> Rename identifiers to state explicitly that they refer to map ops.
>
> Signed-off-by: Zoltan Kiss <zoltan.kiss@...rix.com>
Reviewed-by: Paul Durrant <paul.durrant@...rix.com>
> ---
> v3:
> - rename xenvif_tx_create_gop to xenvif_tx_create_map_op
>
> diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-
> netback/netback.c
> index ae34f5f..8f468ab 100644
> --- a/drivers/net/xen-netback/netback.c
> +++ b/drivers/net/xen-netback/netback.c
> @@ -819,13 +819,13 @@ struct xenvif_tx_cb {
>
> #define XENVIF_TX_CB(skb) ((struct xenvif_tx_cb *)(skb)->cb)
>
> -static inline void xenvif_tx_create_gop(struct xenvif *vif,
> - u16 pending_idx,
> - struct xen_netif_tx_request *txp,
> - struct gnttab_map_grant_ref *gop)
> +static inline void xenvif_tx_create_map_op(struct xenvif *vif,
> + u16 pending_idx,
> + struct xen_netif_tx_request *txp,
> + struct gnttab_map_grant_ref *mop)
> {
> - vif->pages_to_map[gop-vif->tx_map_ops] = vif-
> >mmap_pages[pending_idx];
> - gnttab_set_map_op(gop, idx_to_kaddr(vif, pending_idx),
> + vif->pages_to_map[mop-vif->tx_map_ops] = vif-
> >mmap_pages[pending_idx];
> + gnttab_set_map_op(mop, idx_to_kaddr(vif, pending_idx),
> GNTMAP_host_map | GNTMAP_readonly,
> txp->gref, vif->domid);
>
> @@ -879,7 +879,7 @@ static struct gnttab_map_grant_ref
> *xenvif_get_requests(struct xenvif *vif,
> shinfo->nr_frags++, txp++, gop++) {
> index = pending_index(vif->pending_cons++);
> pending_idx = vif->pending_ring[index];
> - xenvif_tx_create_gop(vif, pending_idx, txp, gop);
> + xenvif_tx_create_map_op(vif, pending_idx, txp, gop);
> frag_set_pending_idx(&frags[shinfo->nr_frags],
> pending_idx);
> }
>
> @@ -899,7 +899,7 @@ static struct gnttab_map_grant_ref
> *xenvif_get_requests(struct xenvif *vif,
> shinfo->nr_frags++, txp++, gop++) {
> index = pending_index(vif->pending_cons++);
> pending_idx = vif->pending_ring[index];
> - xenvif_tx_create_gop(vif, pending_idx, txp, gop);
> + xenvif_tx_create_map_op(vif, pending_idx, txp,
> gop);
> frag_set_pending_idx(&frags[shinfo->nr_frags],
> pending_idx);
> }
> @@ -939,9 +939,9 @@ static inline void xenvif_grant_handle_reset(struct
> xenvif *vif,
>
> static int xenvif_tx_check_gop(struct xenvif *vif,
> struct sk_buff *skb,
> - struct gnttab_map_grant_ref **gopp)
> + struct gnttab_map_grant_ref **gopp_map)
> {
> - struct gnttab_map_grant_ref *gop = *gopp;
> + struct gnttab_map_grant_ref *gop_map = *gopp_map;
> u16 pending_idx = XENVIF_TX_CB(skb)->pending_idx;
> struct skb_shared_info *shinfo = skb_shinfo(skb);
> struct pending_tx_info *tx_info;
> @@ -950,11 +950,11 @@ static int xenvif_tx_check_gop(struct xenvif *vif,
> struct sk_buff *first_skb = NULL;
>
> /* Check status of header. */
> - err = gop->status;
> + err = gop_map->status;
> if (unlikely(err))
> xenvif_idx_release(vif, pending_idx,
> XEN_NETIF_RSP_ERROR);
> else
> - xenvif_grant_handle_set(vif, pending_idx , gop->handle);
> + xenvif_grant_handle_set(vif, pending_idx , gop_map-
> >handle);
>
> /* Skip first skb fragment if it is on same page as header fragment. */
> start = (frag_get_pending_idx(&shinfo->frags[0]) == pending_idx);
> @@ -967,10 +967,12 @@ check_frags:
> tx_info = &vif->pending_tx_info[pending_idx];
>
> /* Check error status: if okay then remember grant handle.
> */
> - newerr = (++gop)->status;
> + newerr = (++gop_map)->status;
>
> if (likely(!newerr)) {
> - xenvif_grant_handle_set(vif, pending_idx , gop-
> >handle);
> + xenvif_grant_handle_set(vif,
> + pending_idx,
> + gop_map->handle);
> /* Had a previous error? Invalidate this fragment. */
> if (unlikely(err))
> xenvif_idx_unmap(vif, pending_idx);
> @@ -1022,7 +1024,7 @@ check_frags:
> }
> }
>
> - *gopp = gop + 1;
> + *gopp_map = gop_map + 1;
> return err;
> }
>
> @@ -1291,7 +1293,7 @@ static unsigned xenvif_tx_build_gops(struct xenvif
> *vif, int budget)
> }
> }
>
> - xenvif_tx_create_gop(vif, pending_idx, &txreq, gop);
> + xenvif_tx_create_map_op(vif, pending_idx, &txreq, gop);
>
> gop++;
>
> @@ -1398,7 +1400,7 @@ static int xenvif_handle_frag_list(struct xenvif *vif,
> struct sk_buff *skb)
>
> static int xenvif_tx_submit(struct xenvif *vif)
> {
> - struct gnttab_map_grant_ref *gop = vif->tx_map_ops;
> + struct gnttab_map_grant_ref *gop_map = vif->tx_map_ops;
> struct sk_buff *skb;
> int work_done = 0;
>
> @@ -1411,7 +1413,7 @@ static int xenvif_tx_submit(struct xenvif *vif)
> txp = &vif->pending_tx_info[pending_idx].req;
>
> /* Check the remap error code. */
> - if (unlikely(xenvif_tx_check_gop(vif, skb, &gop))) {
> + if (unlikely(xenvif_tx_check_gop(vif, skb, &gop_map))) {
> netdev_dbg(vif->dev, "netback grant failed.\n");
> skb_shinfo(skb)->nr_frags = 0;
> kfree_skb(skb);
> @@ -1610,21 +1612,21 @@ static inline void xenvif_tx_dealloc_action(struct
> xenvif *vif)
> /* Called after netfront has transmitted */
> int xenvif_tx_action(struct xenvif *vif, int budget)
> {
> - unsigned nr_gops;
> + unsigned nr_mops;
> int work_done, ret;
>
> if (unlikely(!tx_work_todo(vif)))
> return 0;
>
> - nr_gops = xenvif_tx_build_gops(vif, budget);
> + nr_mops = xenvif_tx_build_gops(vif, budget);
>
> - if (nr_gops == 0)
> + if (nr_mops == 0)
> return 0;
>
> ret = gnttab_map_refs(vif->tx_map_ops,
> NULL,
> vif->pages_to_map,
> - nr_gops);
> + nr_mops);
> BUG_ON(ret);
>
> work_done = xenvif_tx_submit(vif);
--
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