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Subject[RFC PATCH 15/16] xen/net: gnttab, evtchn, xenbus API changes
Date
For the most part, we now pass xenhost_t * as parameter.

Co-developed-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
---
drivers/net/xen-netback/hash.c | 7 +-
drivers/net/xen-netback/interface.c | 7 +-
drivers/net/xen-netback/netback.c | 11 +--
drivers/net/xen-netback/rx.c | 3 +-
drivers/net/xen-netback/xenbus.c | 81 +++++++++++-----------
drivers/net/xen-netfront.c | 102 +++++++++++++++-------------
6 files changed, 117 insertions(+), 94 deletions(-)

diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c
index 0ccb021f1e78..93a449571ef3 100644
--- a/drivers/net/xen-netback/hash.c
+++ b/drivers/net/xen-netback/hash.c
@@ -289,6 +289,8 @@ u32 xenvif_set_hash_flags(struct xenvif *vif, u32 flags)
u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len)
{
u8 *key = vif->hash.key;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(vif);
+
struct gnttab_copy copy_op = {
.source.u.ref = gref,
.source.domid = vif->domid,
@@ -303,7 +305,7 @@ u32 xenvif_set_hash_key(struct xenvif *vif, u32 gref, u32 len)
return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;

if (copy_op.len != 0) {
- gnttab_batch_copy(&copy_op, 1);
+ gnttab_batch_copy(dev->xh, &copy_op, 1);

if (copy_op.status != GNTST_okay)
return XEN_NETIF_CTRL_STATUS_INVALID_PARAMETER;
@@ -334,6 +336,7 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
u32 off)
{
u32 *mapping = vif->hash.mapping[!vif->hash.mapping_sel];
+ struct xenbus_device *dev = xenvif_to_xenbus_device(vif);
unsigned int nr = 1;
struct gnttab_copy copy_op[2] = {{
.source.u.ref = gref,
@@ -363,7 +366,7 @@ u32 xenvif_set_hash_mapping(struct xenvif *vif, u32 gref, u32 len,
vif->hash.size * sizeof(*mapping));

if (copy_op[0].len != 0) {
- gnttab_batch_copy(copy_op, nr);
+ gnttab_batch_copy(dev->xh, copy_op, nr);

if (copy_op[0].status != GNTST_okay ||
copy_op[nr - 1].status != GNTST_okay)
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index 53d4e6351f1e..329a4c701042 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -519,6 +519,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
int xenvif_init_queue(struct xenvif_queue *queue)
{
int err, i;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);

queue->credit_bytes = queue->remaining_credit = ~0UL;
queue->credit_usec = 0UL;
@@ -542,7 +543,7 @@ int xenvif_init_queue(struct xenvif_queue *queue)
* better enable it. The long term solution would be to use just a
* bunch of valid page descriptors, without dependency on ballooning
*/
- err = gnttab_alloc_pages(MAX_PENDING_REQS,
+ err = gnttab_alloc_pages(dev->xh, MAX_PENDING_REQS,
queue->mmap_pages);
if (err) {
netdev_err(queue->vif->dev, "Could not reserve mmap_pages\n");
@@ -790,7 +791,9 @@ void xenvif_disconnect_ctrl(struct xenvif *vif)
*/
void xenvif_deinit_queue(struct xenvif_queue *queue)
{
- gnttab_free_pages(MAX_PENDING_REQS, queue->mmap_pages);
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);
+
+ gnttab_free_pages(dev->xh, MAX_PENDING_REQS, queue->mmap_pages);
}

void xenvif_free(struct xenvif *vif)
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 80aae3a32c2a..055de62ecbf5 100644
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -1244,6 +1244,7 @@ static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)
pending_ring_idx_t dc, dp;
u16 pending_idx, pending_idx_release[MAX_PENDING_REQS];
unsigned int i = 0;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);

dc = queue->dealloc_cons;
gop = queue->tx_unmap_ops;
@@ -1280,7 +1281,7 @@ static inline void xenvif_tx_dealloc_action(struct xenvif_queue *queue)

if (gop - queue->tx_unmap_ops > 0) {
int ret;
- ret = gnttab_unmap_refs(queue->tx_unmap_ops,
+ ret = gnttab_unmap_refs(dev->xh, queue->tx_unmap_ops,
NULL,
queue->pages_to_unmap,
gop - queue->tx_unmap_ops);
@@ -1310,6 +1311,7 @@ int xenvif_tx_action(struct xenvif_queue *queue, int budget)
{
unsigned nr_mops, nr_cops = 0;
int work_done, ret;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);

if (unlikely(!tx_work_todo(queue)))
return 0;
@@ -1319,9 +1321,9 @@ int xenvif_tx_action(struct xenvif_queue *queue, int budget)
if (nr_cops == 0)
return 0;

- gnttab_batch_copy(queue->tx_copy_ops, nr_cops);
+ gnttab_batch_copy(dev->xh, queue->tx_copy_ops, nr_cops);
if (nr_mops != 0) {
- ret = gnttab_map_refs(queue->tx_map_ops,
+ ret = gnttab_map_refs(dev->xh, queue->tx_map_ops,
NULL,
queue->pages_to_map,
nr_mops);
@@ -1391,6 +1393,7 @@ void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx)
{
int ret;
struct gnttab_unmap_grant_ref tx_unmap_op;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);

gnttab_set_unmap_op(&tx_unmap_op,
idx_to_kaddr(queue, pending_idx),
@@ -1398,7 +1401,7 @@ void xenvif_idx_unmap(struct xenvif_queue *queue, u16 pending_idx)
queue->grant_tx_handle[pending_idx]);
xenvif_grant_handle_reset(queue, pending_idx);

- ret = gnttab_unmap_refs(&tx_unmap_op, NULL,
+ ret = gnttab_unmap_refs(dev->xh, &tx_unmap_op, NULL,
&queue->mmap_pages[pending_idx], 1);
if (ret) {
netdev_err(queue->vif->dev,
diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c
index ef5887037b22..aa8fcbe315a6 100644
--- a/drivers/net/xen-netback/rx.c
+++ b/drivers/net/xen-netback/rx.c
@@ -134,8 +134,9 @@ static void xenvif_rx_copy_flush(struct xenvif_queue *queue)
{
unsigned int i;
int notify;
+ struct xenbus_device *dev = xenvif_to_xenbus_device(queue->vif);

- gnttab_batch_copy(queue->rx_copy.op, queue->rx_copy.num);
+ gnttab_batch_copy(dev->xh, queue->rx_copy.op, queue->rx_copy.num);

for (i = 0; i < queue->rx_copy.num; i++) {
struct gnttab_copy *op;
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 2625740bdc4a..09316c221db9 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -257,7 +257,7 @@ static int netback_remove(struct xenbus_device *dev)
if (be->vif) {
kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
xen_unregister_watchers(be->vif);
- xenbus_rm(XBT_NIL, dev->nodename, "hotplug-status");
+ xenbus_rm(dev->xh, XBT_NIL, dev->nodename, "hotplug-status");
xenvif_free(be->vif);
be->vif = NULL;
}
@@ -299,26 +299,26 @@ static int netback_probe(struct xenbus_device *dev,
sg = 1;

do {
- err = xenbus_transaction_start(&xbt);
+ err = xenbus_transaction_start(dev->xh, &xbt);
if (err) {
xenbus_dev_fatal(dev, err, "starting transaction");
goto fail;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%d", sg);
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-sg", "%d", sg);
if (err) {
message = "writing feature-sg";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4",
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-gso-tcpv4",
"%d", sg);
if (err) {
message = "writing feature-gso-tcpv4";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv6",
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-gso-tcpv6",
"%d", sg);
if (err) {
message = "writing feature-gso-tcpv6";
@@ -326,7 +326,7 @@ static int netback_probe(struct xenbus_device *dev,
}

/* We support partial checksum setup for IPv6 packets */
- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"feature-ipv6-csum-offload",
"%d", 1);
if (err) {
@@ -335,7 +335,7 @@ static int netback_probe(struct xenbus_device *dev,
}

/* We support rx-copy path. */
- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"feature-rx-copy", "%d", 1);
if (err) {
message = "writing feature-rx-copy";
@@ -346,7 +346,7 @@ static int netback_probe(struct xenbus_device *dev,
* We don't support rx-flip path (except old guests who don't
* grok this feature flag).
*/
- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"feature-rx-flip", "%d", 0);
if (err) {
message = "writing feature-rx-flip";
@@ -354,14 +354,14 @@ static int netback_probe(struct xenbus_device *dev,
}

/* We support dynamic multicast-control. */
- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"feature-multicast-control", "%d", 1);
if (err) {
message = "writing feature-multicast-control";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"feature-dynamic-multicast-control",
"%d", 1);
if (err) {
@@ -369,7 +369,7 @@ static int netback_probe(struct xenbus_device *dev,
goto abort_transaction;
}

- err = xenbus_transaction_end(xbt, 0);
+ err = xenbus_transaction_end(dev->xh, xbt, 0);
} while (err == -EAGAIN);

if (err) {
@@ -381,25 +381,25 @@ static int netback_probe(struct xenbus_device *dev,
* Split event channels support, this is optional so it is not
* put inside the above loop.
*/
- err = xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(dev->xh, XBT_NIL, dev->nodename,
"feature-split-event-channels",
"%u", separate_tx_rx_irq);
if (err)
pr_debug("Error writing feature-split-event-channels\n");

/* Multi-queue support: This is an optional feature. */
- err = xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(dev->xh, XBT_NIL, dev->nodename,
"multi-queue-max-queues", "%u", xenvif_max_queues);
if (err)
pr_debug("Error writing multi-queue-max-queues\n");

- err = xenbus_printf(XBT_NIL, dev->nodename,
+ err = xenbus_printf(dev->xh, XBT_NIL, dev->nodename,
"feature-ctrl-ring",
"%u", true);
if (err)
pr_debug("Error writing feature-ctrl-ring\n");

- script = xenbus_read(XBT_NIL, dev->nodename, "script", NULL);
+ script = xenbus_read(dev->xh, XBT_NIL, dev->nodename, "script", NULL);
if (IS_ERR(script)) {
err = PTR_ERR(script);
xenbus_dev_fatal(dev, err, "reading script");
@@ -417,7 +417,7 @@ static int netback_probe(struct xenbus_device *dev,
return 0;

abort_transaction:
- xenbus_transaction_end(xbt, 1);
+ xenbus_transaction_end(dev->xh, xbt, 1);
xenbus_dev_fatal(dev, err, "%s", message);
fail:
pr_debug("failed\n");
@@ -459,7 +459,7 @@ static int backend_create_xenvif(struct backend_info *be)
if (be->vif != NULL)
return 0;

- err = xenbus_scanf(XBT_NIL, dev->nodename, "handle", "%li", &handle);
+ err = xenbus_scanf(dev->xh, XBT_NIL, dev->nodename, "handle", "%li", &handle);
if (err != 1) {
xenbus_dev_fatal(dev, err, "reading handle");
return (err < 0) ? err : -EINVAL;
@@ -680,7 +680,7 @@ static void xen_net_read_rate(struct xenbus_device *dev,
*bytes = ~0UL;
*usec = 0;

- ratestr = xenbus_read(XBT_NIL, dev->nodename, "rate", NULL);
+ ratestr = xenbus_read(dev->xh, XBT_NIL, dev->nodename, "rate", NULL);
if (IS_ERR(ratestr))
return;

@@ -710,7 +710,7 @@ static int xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
char *s, *e, *macstr;
int i;

- macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL);
+ macstr = s = xenbus_read(dev->xh, XBT_NIL, dev->nodename, "mac", NULL);
if (IS_ERR(macstr))
return PTR_ERR(macstr);

@@ -765,7 +765,7 @@ static int xen_register_credit_watch(struct xenbus_device *dev,
snprintf(node, maxlen, "%s/rate", dev->nodename);
vif->credit_watch.node = node;
vif->credit_watch.callback = xen_net_rate_changed;
- err = register_xenbus_watch(&vif->credit_watch);
+ err = register_xenbus_watch(dev->xh, &vif->credit_watch);
if (err) {
pr_err("Failed to set watcher %s\n", vif->credit_watch.node);
kfree(node);
@@ -777,8 +777,9 @@ static int xen_register_credit_watch(struct xenbus_device *dev,

static void xen_unregister_credit_watch(struct xenvif *vif)
{
+ struct xenbus_device *dev = xenvif_to_xenbus_device(vif);
if (vif->credit_watch.node) {
- unregister_xenbus_watch(&vif->credit_watch);
+ unregister_xenbus_watch(dev->xh, &vif->credit_watch);
kfree(vif->credit_watch.node);
vif->credit_watch.node = NULL;
}
@@ -791,7 +792,7 @@ static void xen_mcast_ctrl_changed(struct xenbus_watch *watch,
mcast_ctrl_watch);
struct xenbus_device *dev = xenvif_to_xenbus_device(vif);

- vif->multicast_control = !!xenbus_read_unsigned(dev->otherend,
+ vif->multicast_control = !!xenbus_read_unsigned(dev->xh, dev->otherend,
"request-multicast-control", 0);
}

@@ -817,7 +818,7 @@ static int xen_register_mcast_ctrl_watch(struct xenbus_device *dev,
dev->otherend);
vif->mcast_ctrl_watch.node = node;
vif->mcast_ctrl_watch.callback = xen_mcast_ctrl_changed;
- err = register_xenbus_watch(&vif->mcast_ctrl_watch);
+ err = register_xenbus_watch(dev->xh, &vif->mcast_ctrl_watch);
if (err) {
pr_err("Failed to set watcher %s\n",
vif->mcast_ctrl_watch.node);
@@ -830,8 +831,10 @@ static int xen_register_mcast_ctrl_watch(struct xenbus_device *dev,

static void xen_unregister_mcast_ctrl_watch(struct xenvif *vif)
{
+ struct xenbus_device *dev = xenvif_to_xenbus_device(vif);
+
if (vif->mcast_ctrl_watch.node) {
- unregister_xenbus_watch(&vif->mcast_ctrl_watch);
+ unregister_xenbus_watch(dev->xh, &vif->mcast_ctrl_watch);
kfree(vif->mcast_ctrl_watch.node);
vif->mcast_ctrl_watch.node = NULL;
}
@@ -853,7 +856,7 @@ static void xen_unregister_watchers(struct xenvif *vif)
static void unregister_hotplug_status_watch(struct backend_info *be)
{
if (be->have_hotplug_status_watch) {
- unregister_xenbus_watch(&be->hotplug_status_watch);
+ unregister_xenbus_watch(be->dev->xh, &be->hotplug_status_watch);
kfree(be->hotplug_status_watch.node);
}
be->have_hotplug_status_watch = 0;
@@ -869,7 +872,7 @@ static void hotplug_status_changed(struct xenbus_watch *watch,
char *str;
unsigned int len;

- str = xenbus_read(XBT_NIL, be->dev->nodename, "hotplug-status", &len);
+ str = xenbus_read(be->dev->xh, XBT_NIL, be->dev->nodename, "hotplug-status", &len);
if (IS_ERR(str))
return;
if (len == sizeof("connected")-1 && !memcmp(str, "connected", len)) {
@@ -891,14 +894,14 @@ static int connect_ctrl_ring(struct backend_info *be)
unsigned int evtchn;
int err;

- err = xenbus_scanf(XBT_NIL, dev->otherend,
+ err = xenbus_scanf(dev->xh, XBT_NIL, dev->otherend,
"ctrl-ring-ref", "%u", &val);
if (err < 0)
goto done; /* The frontend does not have a control ring */

ring_ref = val;

- err = xenbus_scanf(XBT_NIL, dev->otherend,
+ err = xenbus_scanf(dev->xh, XBT_NIL, dev->otherend,
"event-channel-ctrl", "%u", &val);
if (err < 0) {
xenbus_dev_fatal(dev, err,
@@ -936,7 +939,7 @@ static void connect(struct backend_info *be)
/* Check whether the frontend requested multiple queues
* and read the number requested.
*/
- requested_num_queues = xenbus_read_unsigned(dev->otherend,
+ requested_num_queues = xenbus_read_unsigned(dev->xh, dev->otherend,
"multi-queue-num-queues", 1);
if (requested_num_queues > xenvif_max_queues) {
/* buggy or malicious guest */
@@ -1087,7 +1090,7 @@ static int connect_data_rings(struct backend_info *be,
queue->id);
}

- err = xenbus_gather(XBT_NIL, xspath,
+ err = xenbus_gather(dev->xh, XBT_NIL, xspath,
"tx-ring-ref", "%lu", &tx_ring_ref,
"rx-ring-ref", "%lu", &rx_ring_ref, NULL);
if (err) {
@@ -1098,11 +1101,11 @@ static int connect_data_rings(struct backend_info *be,
}

/* Try split event channels first, then single event channel. */
- err = xenbus_gather(XBT_NIL, xspath,
+ err = xenbus_gather(dev->xh, XBT_NIL, xspath,
"event-channel-tx", "%u", &tx_evtchn,
"event-channel-rx", "%u", &rx_evtchn, NULL);
if (err < 0) {
- err = xenbus_scanf(XBT_NIL, xspath,
+ err = xenbus_scanf(dev->xh, XBT_NIL, xspath,
"event-channel", "%u", &tx_evtchn);
if (err < 0) {
xenbus_dev_fatal(dev, err,
@@ -1137,7 +1140,7 @@ static int read_xenbus_vif_flags(struct backend_info *be)
unsigned int rx_copy;
int err;

- err = xenbus_scanf(XBT_NIL, dev->otherend, "request-rx-copy", "%u",
+ err = xenbus_scanf(dev->xh, XBT_NIL, dev->otherend, "request-rx-copy", "%u",
&rx_copy);
if (err == -ENOENT) {
err = 0;
@@ -1151,7 +1154,7 @@ static int read_xenbus_vif_flags(struct backend_info *be)
if (!rx_copy)
return -EOPNOTSUPP;

- if (!xenbus_read_unsigned(dev->otherend, "feature-rx-notify", 0)) {
+ if (!xenbus_read_unsigned(dev->xh, dev->otherend, "feature-rx-notify", 0)) {
/* - Reduce drain timeout to poll more frequently for
* Rx requests.
* - Disable Rx stall detection.
@@ -1160,20 +1163,20 @@ static int read_xenbus_vif_flags(struct backend_info *be)
be->vif->stall_timeout = 0;
}

- vif->can_sg = !!xenbus_read_unsigned(dev->otherend, "feature-sg", 0);
+ vif->can_sg = !!xenbus_read_unsigned(dev->xh, dev->otherend, "feature-sg", 0);

vif->gso_mask = 0;

- if (xenbus_read_unsigned(dev->otherend, "feature-gso-tcpv4", 0))
+ if (xenbus_read_unsigned(dev->xh, dev->otherend, "feature-gso-tcpv4", 0))
vif->gso_mask |= GSO_BIT(TCPV4);

- if (xenbus_read_unsigned(dev->otherend, "feature-gso-tcpv6", 0))
+ if (xenbus_read_unsigned(dev->xh, dev->otherend, "feature-gso-tcpv6", 0))
vif->gso_mask |= GSO_BIT(TCPV6);

- vif->ip_csum = !xenbus_read_unsigned(dev->otherend,
+ vif->ip_csum = !xenbus_read_unsigned(dev->xh, dev->otherend,
"feature-no-csum-offload", 0);

- vif->ipv6_csum = !!xenbus_read_unsigned(dev->otherend,
+ vif->ipv6_csum = !!xenbus_read_unsigned(dev->xh, dev->otherend,
"feature-ipv6-csum-offload", 0);

return 0;
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index ee28e8b85406..71007ad822c0 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -285,6 +285,7 @@ static void xennet_alloc_rx_buffers(struct netfront_queue *queue)
RING_IDX req_prod = queue->rx.req_prod_pvt;
int notify;
int err = 0;
+ struct xenbus_device *dev = queue->info->xbdev;

if (unlikely(!netif_carrier_ok(queue->info->netdev)))
return;
@@ -309,14 +310,14 @@ static void xennet_alloc_rx_buffers(struct netfront_queue *queue)
BUG_ON(queue->rx_skbs[id]);
queue->rx_skbs[id] = skb;

- ref = gnttab_claim_grant_reference(&queue->gref_rx_head);
+ ref = gnttab_claim_grant_reference(dev->xh, &queue->gref_rx_head);
WARN_ON_ONCE(IS_ERR_VALUE((unsigned long)(int)ref));
queue->grant_rx_ref[id] = ref;

page = skb_frag_page(&skb_shinfo(skb)->frags[0]);

req = RING_GET_REQUEST(&queue->rx, req_prod);
- gnttab_page_grant_foreign_access_ref_one(ref,
+ gnttab_page_grant_foreign_access_ref_one(dev->xh, ref,
queue->info->xbdev->otherend_id,
page,
0);
@@ -377,6 +378,7 @@ static void xennet_tx_buf_gc(struct netfront_queue *queue)
unsigned short id;
struct sk_buff *skb;
bool more_to_do;
+ struct xenbus_device *dev = queue->info->xbdev;

BUG_ON(!netif_carrier_ok(queue->info->netdev));

@@ -393,15 +395,15 @@ static void xennet_tx_buf_gc(struct netfront_queue *queue)

id = txrsp->id;
skb = queue->tx_skbs[id].skb;
- if (unlikely(gnttab_query_foreign_access(
+ if (unlikely(gnttab_query_foreign_access(dev->xh,
queue->grant_tx_ref[id]) != 0)) {
pr_alert("%s: warning -- grant still in use by backend domain\n",
__func__);
BUG();
}
- gnttab_end_foreign_access_ref(
+ gnttab_end_foreign_access_ref(dev->xh,
queue->grant_tx_ref[id], GNTMAP_readonly);
- gnttab_release_grant_reference(
+ gnttab_release_grant_reference(dev->xh,
&queue->gref_tx_head, queue->grant_tx_ref[id]);
queue->grant_tx_ref[id] = GRANT_INVALID_REF;
queue->grant_tx_page[id] = NULL;
@@ -436,13 +438,14 @@ static void xennet_tx_setup_grant(unsigned long gfn, unsigned int offset,
struct page *page = info->page;
struct netfront_queue *queue = info->queue;
struct sk_buff *skb = info->skb;
+ struct xenbus_device *dev = queue->info->xbdev;

id = get_id_from_freelist(&queue->tx_skb_freelist, queue->tx_skbs);
tx = RING_GET_REQUEST(&queue->tx, queue->tx.req_prod_pvt++);
- ref = gnttab_claim_grant_reference(&queue->gref_tx_head);
+ ref = gnttab_claim_grant_reference(dev->xh, &queue->gref_tx_head);
WARN_ON_ONCE(IS_ERR_VALUE((unsigned long)(int)ref));

- gnttab_grant_foreign_access_ref(ref, queue->info->xbdev->otherend_id,
+ gnttab_grant_foreign_access_ref(dev->xh, ref, queue->info->xbdev->otherend_id,
gfn, GNTMAP_readonly);

queue->tx_skbs[id].skb = skb;
@@ -786,6 +789,7 @@ static int xennet_get_responses(struct netfront_queue *queue,
struct xen_netif_rx_response *rx = &rinfo->rx;
struct xen_netif_extra_info *extras = rinfo->extras;
struct device *dev = &queue->info->netdev->dev;
+ struct xenbus_device *xdev = queue->info->xbdev;
RING_IDX cons = queue->rx.rsp_cons;
struct sk_buff *skb = xennet_get_rx_skb(queue, cons);
grant_ref_t ref = xennet_get_rx_ref(queue, cons);
@@ -823,10 +827,10 @@ static int xennet_get_responses(struct netfront_queue *queue,
goto next;
}

- ret = gnttab_end_foreign_access_ref(ref, 0);
+ ret = gnttab_end_foreign_access_ref(xdev->xh, ref, 0);
BUG_ON(!ret);

- gnttab_release_grant_reference(&queue->gref_rx_head, ref);
+ gnttab_release_grant_reference(xdev->xh, &queue->gref_rx_head, ref);

__skb_queue_tail(list, skb);

@@ -1130,6 +1134,7 @@ static void xennet_release_tx_bufs(struct netfront_queue *queue)
{
struct sk_buff *skb;
int i;
+ struct xenbus_device *dev = queue->info->xbdev;

for (i = 0; i < NET_TX_RING_SIZE; i++) {
/* Skip over entries which are actually freelist references */
@@ -1138,7 +1143,7 @@ static void xennet_release_tx_bufs(struct netfront_queue *queue)

skb = queue->tx_skbs[i].skb;
get_page(queue->grant_tx_page[i]);
- gnttab_end_foreign_access(queue->grant_tx_ref[i],
+ gnttab_end_foreign_access(dev->xh, queue->grant_tx_ref[i],
GNTMAP_readonly,
(unsigned long)page_address(queue->grant_tx_page[i]));
queue->grant_tx_page[i] = NULL;
@@ -1151,6 +1156,7 @@ static void xennet_release_tx_bufs(struct netfront_queue *queue)
static void xennet_release_rx_bufs(struct netfront_queue *queue)
{
int id, ref;
+ struct xenbus_device *dev = queue->info->xbdev;

spin_lock_bh(&queue->rx_lock);

@@ -1172,7 +1178,7 @@ static void xennet_release_rx_bufs(struct netfront_queue *queue)
* foreign access is ended (which may be deferred).
*/
get_page(page);
- gnttab_end_foreign_access(ref, 0,
+ gnttab_end_foreign_access(dev->xh, ref, 0,
(unsigned long)page_address(page));
queue->grant_rx_ref[id] = GRANT_INVALID_REF;

@@ -1186,22 +1192,23 @@ static netdev_features_t xennet_fix_features(struct net_device *dev,
netdev_features_t features)
{
struct netfront_info *np = netdev_priv(dev);
+ struct xenbus_device *xdev = np->xbdev;

if (features & NETIF_F_SG &&
- !xenbus_read_unsigned(np->xbdev->otherend, "feature-sg", 0))
+ !xenbus_read_unsigned(xdev->xh, np->xbdev->otherend, "feature-sg", 0))
features &= ~NETIF_F_SG;

if (features & NETIF_F_IPV6_CSUM &&
- !xenbus_read_unsigned(np->xbdev->otherend,
+ !xenbus_read_unsigned(xdev->xh, np->xbdev->otherend,
"feature-ipv6-csum-offload", 0))
features &= ~NETIF_F_IPV6_CSUM;

if (features & NETIF_F_TSO &&
- !xenbus_read_unsigned(np->xbdev->otherend, "feature-gso-tcpv4", 0))
+ !xenbus_read_unsigned(xdev->xh, np->xbdev->otherend, "feature-gso-tcpv4", 0))
features &= ~NETIF_F_TSO;

if (features & NETIF_F_TSO6 &&
- !xenbus_read_unsigned(np->xbdev->otherend, "feature-gso-tcpv6", 0))
+ !xenbus_read_unsigned(xdev->xh, np->xbdev->otherend, "feature-gso-tcpv6", 0))
features &= ~NETIF_F_TSO6;

return features;
@@ -1375,17 +1382,18 @@ static int netfront_probe(struct xenbus_device *dev,
return 0;
}

-static void xennet_end_access(int ref, void *page)
+static void xennet_end_access(xenhost_t *xh, int ref, void *page)
{
/* This frees the page as a side-effect */
if (ref != GRANT_INVALID_REF)
- gnttab_end_foreign_access(ref, 0, (unsigned long)page);
+ gnttab_end_foreign_access(xh, ref, 0, (unsigned long)page);
}

static void xennet_disconnect_backend(struct netfront_info *info)
{
unsigned int i = 0;
unsigned int num_queues = info->netdev->real_num_tx_queues;
+ struct xenbus_device *dev = info->xbdev;

netif_carrier_off(info->netdev);

@@ -1408,12 +1416,12 @@ static void xennet_disconnect_backend(struct netfront_info *info)

xennet_release_tx_bufs(queue);
xennet_release_rx_bufs(queue);
- gnttab_free_grant_references(queue->gref_tx_head);
- gnttab_free_grant_references(queue->gref_rx_head);
+ gnttab_free_grant_references(dev->xh, queue->gref_tx_head);
+ gnttab_free_grant_references(dev->xh, queue->gref_rx_head);

/* End access and free the pages */
- xennet_end_access(queue->tx_ring_ref, queue->tx.sring);
- xennet_end_access(queue->rx_ring_ref, queue->rx.sring);
+ xennet_end_access(dev->xh, queue->tx_ring_ref, queue->tx.sring);
+ xennet_end_access(dev->xh, queue->rx_ring_ref, queue->rx.sring);

queue->tx_ring_ref = GRANT_INVALID_REF;
queue->rx_ring_ref = GRANT_INVALID_REF;
@@ -1443,7 +1451,7 @@ static int xen_net_read_mac(struct xenbus_device *dev, u8 mac[])
char *s, *e, *macstr;
int i;

- macstr = s = xenbus_read(XBT_NIL, dev->nodename, "mac", NULL);
+ macstr = s = xenbus_read(dev->xh, XBT_NIL, dev->nodename, "mac", NULL);
if (IS_ERR(macstr))
return PTR_ERR(macstr);

@@ -1588,11 +1596,11 @@ static int setup_netfront(struct xenbus_device *dev,
* granted pages because backend is not accessing it at this point.
*/
alloc_evtchn_fail:
- gnttab_end_foreign_access_ref(queue->rx_ring_ref, 0);
+ gnttab_end_foreign_access_ref(dev->xh, queue->rx_ring_ref, 0);
grant_rx_ring_fail:
free_page((unsigned long)rxs);
alloc_rx_ring_fail:
- gnttab_end_foreign_access_ref(queue->tx_ring_ref, 0);
+ gnttab_end_foreign_access_ref(dev->xh, queue->tx_ring_ref, 0);
grant_tx_ring_fail:
free_page((unsigned long)txs);
fail:
@@ -1608,6 +1616,7 @@ static int xennet_init_queue(struct netfront_queue *queue)
unsigned short i;
int err = 0;
char *devid;
+ struct xenbus_device *dev = queue->info->xbdev;

spin_lock_init(&queue->tx_lock);
spin_lock_init(&queue->rx_lock);
@@ -1633,7 +1642,7 @@ static int xennet_init_queue(struct netfront_queue *queue)
}

/* A grant for every tx ring slot */
- if (gnttab_alloc_grant_references(NET_TX_RING_SIZE,
+ if (gnttab_alloc_grant_references(dev->xh, NET_TX_RING_SIZE,
&queue->gref_tx_head) < 0) {
pr_alert("can't alloc tx grant refs\n");
err = -ENOMEM;
@@ -1641,7 +1650,7 @@ static int xennet_init_queue(struct netfront_queue *queue)
}

/* A grant for every rx ring slot */
- if (gnttab_alloc_grant_references(NET_RX_RING_SIZE,
+ if (gnttab_alloc_grant_references(dev->xh, NET_RX_RING_SIZE,
&queue->gref_rx_head) < 0) {
pr_alert("can't alloc rx grant refs\n");
err = -ENOMEM;
@@ -1651,7 +1660,7 @@ static int xennet_init_queue(struct netfront_queue *queue)
return 0;

exit_free_tx:
- gnttab_free_grant_references(queue->gref_tx_head);
+ gnttab_free_grant_references(dev->xh, queue->gref_tx_head);
exit:
return err;
}
@@ -1685,14 +1694,14 @@ static int write_queue_xenstore_keys(struct netfront_queue *queue,
}

/* Write ring references */
- err = xenbus_printf(*xbt, path, "tx-ring-ref", "%u",
+ err = xenbus_printf(dev->xh, *xbt, path, "tx-ring-ref", "%u",
queue->tx_ring_ref);
if (err) {
message = "writing tx-ring-ref";
goto error;
}

- err = xenbus_printf(*xbt, path, "rx-ring-ref", "%u",
+ err = xenbus_printf(dev->xh, *xbt, path, "rx-ring-ref", "%u",
queue->rx_ring_ref);
if (err) {
message = "writing rx-ring-ref";
@@ -1704,7 +1713,7 @@ static int write_queue_xenstore_keys(struct netfront_queue *queue,
*/
if (queue->tx_evtchn == queue->rx_evtchn) {
/* Shared event channel */
- err = xenbus_printf(*xbt, path,
+ err = xenbus_printf(dev->xh,*xbt, path,
"event-channel", "%u", queue->tx_evtchn);
if (err) {
message = "writing event-channel";
@@ -1712,14 +1721,14 @@ static int write_queue_xenstore_keys(struct netfront_queue *queue,
}
} else {
/* Split event channels */
- err = xenbus_printf(*xbt, path,
+ err = xenbus_printf(dev->xh, *xbt, path,
"event-channel-tx", "%u", queue->tx_evtchn);
if (err) {
message = "writing event-channel-tx";
goto error;
}

- err = xenbus_printf(*xbt, path,
+ err = xenbus_printf(dev->xh, *xbt, path,
"event-channel-rx", "%u", queue->rx_evtchn);
if (err) {
message = "writing event-channel-rx";
@@ -1810,12 +1819,12 @@ static int talk_to_netback(struct xenbus_device *dev,
info->netdev->irq = 0;

/* Check if backend supports multiple queues */
- max_queues = xenbus_read_unsigned(info->xbdev->otherend,
+ max_queues = xenbus_read_unsigned(dev->xh, info->xbdev->otherend,
"multi-queue-max-queues", 1);
num_queues = min(max_queues, xennet_max_queues);

/* Check feature-split-event-channels */
- feature_split_evtchn = xenbus_read_unsigned(info->xbdev->otherend,
+ feature_split_evtchn = xenbus_read_unsigned(dev->xh, info->xbdev->otherend,
"feature-split-event-channels", 0);

/* Read mac addr. */
@@ -1847,16 +1856,16 @@ static int talk_to_netback(struct xenbus_device *dev,
}

again:
- err = xenbus_transaction_start(&xbt);
+ err = xenbus_transaction_start(dev->xh, &xbt);
if (err) {
xenbus_dev_fatal(dev, err, "starting transaction");
goto destroy_ring;
}

- if (xenbus_exists(XBT_NIL,
+ if (xenbus_exists(dev->xh, XBT_NIL,
info->xbdev->otherend, "multi-queue-max-queues")) {
/* Write the number of queues */
- err = xenbus_printf(xbt, dev->nodename,
+ err = xenbus_printf(dev->xh, xbt, dev->nodename,
"multi-queue-num-queues", "%u", num_queues);
if (err) {
message = "writing multi-queue-num-queues";
@@ -1879,45 +1888,45 @@ static int talk_to_netback(struct xenbus_device *dev,
}

/* The remaining keys are not queue-specific */
- err = xenbus_printf(xbt, dev->nodename, "request-rx-copy", "%u",
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "request-rx-copy", "%u",
1);
if (err) {
message = "writing request-rx-copy";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-rx-notify", "%d", 1);
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-rx-notify", "%d", 1);
if (err) {
message = "writing feature-rx-notify";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-sg", "%d", 1);
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-sg", "%d", 1);
if (err) {
message = "writing feature-sg";
goto abort_transaction;
}

- err = xenbus_printf(xbt, dev->nodename, "feature-gso-tcpv4", "%d", 1);
+ err = xenbus_printf(dev->xh, xbt, dev->nodename, "feature-gso-tcpv4", "%d", 1);
if (err) {
message = "writing feature-gso-tcpv4";
goto abort_transaction;
}

- err = xenbus_write(xbt, dev->nodename, "feature-gso-tcpv6", "1");
+ err = xenbus_write(dev->xh, xbt, dev->nodename, "feature-gso-tcpv6", "1");
if (err) {
message = "writing feature-gso-tcpv6";
goto abort_transaction;
}

- err = xenbus_write(xbt, dev->nodename, "feature-ipv6-csum-offload",
+ err = xenbus_write(dev->xh, xbt, dev->nodename, "feature-ipv6-csum-offload",
"1");
if (err) {
message = "writing feature-ipv6-csum-offload";
goto abort_transaction;
}

- err = xenbus_transaction_end(xbt, 0);
+ err = xenbus_transaction_end(dev->xh, xbt, 0);
if (err) {
if (err == -EAGAIN)
goto again;
@@ -1930,7 +1939,7 @@ static int talk_to_netback(struct xenbus_device *dev,
abort_transaction:
xenbus_dev_fatal(dev, err, "%s", message);
abort_transaction_no_dev_fatal:
- xenbus_transaction_end(xbt, 1);
+ xenbus_transaction_end(dev->xh, xbt, 1);
destroy_ring:
xennet_disconnect_backend(info);
rtnl_lock();
@@ -1949,8 +1958,9 @@ static int xennet_connect(struct net_device *dev)
int err;
unsigned int j = 0;
struct netfront_queue *queue = NULL;
+ struct xenbus_device *xdev = np->xbdev;

- if (!xenbus_read_unsigned(np->xbdev->otherend, "feature-rx-copy", 0)) {
+ if (!xenbus_read_unsigned(xdev->xh, np->xbdev->otherend, "feature-rx-copy", 0)) {
dev_info(&dev->dev,
"backend does not support copying receive path\n");
return -ENODEV;
--
2.20.1
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  Last update: 2019-05-09 19:28    [W:0.199 / U:20.744 seconds]
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