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failover: split failover_find_primary_device_id()

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So we can calculate the device id when we need it.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <20201118083748.1328-24-quintela@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Juan Quintela 2020-11-18 09:37:44 +01:00 committed by Michael S. Tsirkin
parent 0a0a27d66b
commit f5e1847ba5
1 changed files with 47 additions and 16 deletions
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63
hw/net/virtio-net.c
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@ -788,6 +788,49 @@ static inline uint64_t virtio_net_supported_guest_offloads(VirtIONet *n)
return virtio_net_guest_offloads_by_features(vdev->guest_features);
}
typedef struct {
VirtIONet *n;
char *id;
} FailoverId;
/**
* Set the id of the failover primary device
*
* @opaque: FailoverId to setup
* @opts: opts for device we are handling
* @errp: returns an error if this function fails
*/
static int failover_set_primary(void *opaque, QemuOpts *opts, Error **errp)
{
FailoverId *fid = opaque;
const char *standby_id = qemu_opt_get(opts, "failover_pair_id");
if (g_strcmp0(standby_id, fid->n->netclient_name) == 0) {
fid->id = g_strdup(opts->id);
return 1;
}
return 0;
}
/**
* Find the primary device id for this failover virtio-net
*
* @n: VirtIONet device
* @errp: returns an error if this function fails
*/
static char *failover_find_primary_device_id(VirtIONet *n)
{
Error *err = NULL;
FailoverId fid;
if (!qemu_opts_foreach(qemu_find_opts("device"),
failover_set_primary, &fid, &err)) {
return NULL;
}
return fid.id;
}
static void failover_add_primary(VirtIONet *n, Error **errp)
{
Error *err = NULL;
@ -812,20 +855,6 @@ static void failover_add_primary(VirtIONet *n, Error **errp)
error_propagate(errp, err);
}
static int is_my_primary(void *opaque, QemuOpts *opts, Error **errp)
{
VirtIONet *n = opaque;
int ret = 0;
const char *standby_id = qemu_opt_get(opts, "failover_pair_id");
if (g_strcmp0(standby_id, n->netclient_name) == 0) {
n->primary_device_id = g_strdup(opts->id);
ret = 1;
}
return ret;
}
/**
* Find the primary device for this failover virtio-net
*
@ -834,11 +863,13 @@ static int is_my_primary(void *opaque, QemuOpts *opts, Error **errp)
*/
static DeviceState *failover_find_primary_device(VirtIONet *n)
{
Error *err = NULL;
char *id = failover_find_primary_device_id(n);
if (!qemu_opts_foreach(qemu_find_opts("device"), is_my_primary, n, &err)) {
if (!id) {
return NULL;
}
n->primary_device_id = g_strdup(id);
return qdev_find_recursive(sysbus_get_default(), n->primary_device_id);
}