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Add functions to determine how port should be opened based on type.

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Depending on the port and type of datapath, a port may need to be opened
as a different type of device than it's configured.  For example, an
"internal" port on a "dummy" datapath should opened as a "dummy" port.
This commit adds the ability for a dpif to provide this information to a
caller.  It will be used in a future commit.

Signed-off-by: Justin Pettit <jpettit@nicira.com>
This commit is contained in:
Justin Pettit
2012-11-14 15:50:20 -08:00
parent 78a2d59c1c
commit 0aeaabc8db
9 changed files with 85 additions and 3 deletions
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13
lib/dpif-netdev.c
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@@ -181,6 +181,14 @@ dpif_netdev_enumerate(struct sset *all_dps)
return 0;
}
static const char *
dpif_netdev_port_open_type(const struct dpif_class *class, const char *type)
{
return strcmp(type, "internal") ? type
: class != &dpif_netdev_class ? "dummy"
: "tap";
}
static struct dpif *
create_dpif_netdev(struct dp_netdev *dp)
{
@@ -369,9 +377,7 @@ do_add_port(struct dp_netdev *dp, const char *devname, const char *type,
/* XXX reject devices already in some dp_netdev. */
/* Open and validate network device. */
open_type = (strcmp(type, "internal") ? type
: dp->class != &dpif_netdev_class ? "dummy"
: "tap");
open_type = dpif_netdev_port_open_type(dp->class, type);
error = netdev_open(devname, open_type, &netdev);
if (error) {
return error;
@@ -1282,6 +1288,7 @@ dp_netdev_execute_actions(struct dp_netdev *dp,
const struct dpif_class dpif_netdev_class = {
"netdev",
dpif_netdev_enumerate,
dpif_netdev_port_open_type,
dpif_netdev_open,
dpif_netdev_close,
dpif_netdev_destroy,