Add an ioctl command in rte_kni module to enable
DPDK applications to propagate link state changes to
kni virtual interfaces.
Signed-off-by: Vijayakumar Muthuvel Manickam <mmvijay at gmail.com>
---
.../linuxapp/eal/include/exec-env/rte_kni_common.h | 2 ++
lib/librte_eal/linuxapp/kni/kni_misc.c | 39 ++++++++++++++++++++++
lib/librte_kni/rte_kni.c | 18 ++++++++++
lib/librte_kni/rte_kni.h | 17 ++++++++++
4 files changed, 76 insertions(+)
diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
index 1e55c2d..b68001d 100644
--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
@@ -163,6 +163,7 @@ struct rte_kni_device_info {
/* mbuf size */
unsigned mbuf_size;
+ uint8_t link_state;
};
#define KNI_DEVICE "kni"
@@ -170,5 +171,6 @@ struct rte_kni_device_info {
#define RTE_KNI_IOCTL_TEST _IOWR(0, 1, int)
#define RTE_KNI_IOCTL_CREATE _IOWR(0, 2, struct rte_kni_device_info)
#define RTE_KNI_IOCTL_RELEASE _IOWR(0, 3, struct rte_kni_device_info)
+#define RTE_KNI_IOCTL_LINK_UPDATE _IOWR(0, 4, struct rte_kni_device_info)
#endif /* _RTE_KNI_COMMON_H_ */
diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c
b/lib/librte_eal/linuxapp/kni/kni_misc.c
index 1935d32..b1015cd 100644
--- a/lib/librte_eal/linuxapp/kni/kni_misc.c
+++ b/lib/librte_eal/linuxapp/kni/kni_misc.c
@@ -548,6 +548,42 @@ kni_ioctl_release(unsigned int ioctl_num, unsigned long
ioctl_param)
}
static int
+kni_ioctl_update_link_state(unsigned int ioctl_num, unsigned long ioctl_param)
+{
+ int ret = -EINVAL;
+ struct kni_dev *dev, *n;
+ struct rte_kni_device_info dev_info;
+
+ if (_IOC_SIZE(ioctl_num) > sizeof(dev_info))
+ return -EINVAL;
+
+ ret = copy_from_user(&dev_info, (void *)ioctl_param, sizeof(dev_info));
+ if (ret) {
+ KNI_ERR("copy_from_user in kni_ioctl_update_link_status");
+ return -EIO;
+ }
+
+ if (strlen(dev_info.name) == 0)
+ return ret;
+
+ down_write(&kni_list_lock);
+ list_for_each_entry_safe(dev, n, &kni_list_head, list) {
+ if (strncmp(dev->name, dev_info.name, RTE_KNI_NAMESIZE) != 0)
+ continue;
+
+ if (dev_info.link_state == 0)
+ netif_carrier_off(dev->net_dev);
+ else
+ netif_carrier_on(dev->net_dev);
+ ret = 0;
+ break;
+ }
+ up_write(&kni_list_lock);
+
+ return ret;
+}
+
+static int
kni_ioctl(struct inode *inode,
unsigned int ioctl_num,
unsigned long ioctl_param)
@@ -569,6 +605,9 @@ kni_ioctl(struct inode *inode,
case _IOC_NR(RTE_KNI_IOCTL_RELEASE):
ret = kni_ioctl_release(ioctl_num, ioctl_param);
break;
+ case _IOC_NR(RTE_KNI_IOCTL_LINK_UPDATE):
+ ret = kni_ioctl_update_link_state(ioctl_num, ioctl_param);
+ break;
default:
KNI_DBG("IOCTL default \n");
break;
diff --git a/lib/librte_kni/rte_kni.c b/lib/librte_kni/rte_kni.c
index 4e70fa0..b6eda8a 100644
--- a/lib/librte_kni/rte_kni.c
+++ b/lib/librte_kni/rte_kni.c
@@ -512,6 +512,24 @@ rte_kni_release(struct rte_kni *kni)
}
int
+rte_kni_update_link_state(struct rte_kni *kni, uint8_t if_up)
+{
+ struct rte_kni_device_info dev_info;
+
+ if (!kni || !kni->in_use)
+ return -1;
+
+ snprintf(dev_info.name, sizeof(dev_info.name), "%s", kni->name);
+ dev_info.link_state = if_up;
+ if (ioctl(kni_fd, RTE_KNI_IOCTL_LINK_UPDATE, &dev_info) < 0) {
+ RTE_LOG(ERR, KNI, "Fail to update link state\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+int
rte_kni_handle_request(struct rte_kni *kni)
{
unsigned ret;
diff --git a/lib/librte_kni/rte_kni.h b/lib/librte_kni/rte_kni.h
index 98edd72..a1bafd9 100644
--- a/lib/librte_kni/rte_kni.h
+++ b/lib/librte_kni/rte_kni.h
@@ -167,6 +167,23 @@ extern struct rte_kni *rte_kni_create(uint8_t port_id,
extern int rte_kni_release(struct rte_kni *kni);
/**
+ * Send link state changes to KNI interface in kernel space
+ *
+ * rte_kni_update_link_state is thread safe.
+ *
+ * @param kni
+ * The pointer to the context of an existent KNI interface.
+ * @param if_up
+ * interface link status
+ *
+ * @return
+ * - 0 indicates success.
+ * - negative value indicates failure.
+ */
+
+extern int rte_kni_update_link_state(struct rte_kni *kni, uint8_t if_up);
+
+/**
* It is used to handle the request mbufs sent from kernel space.
* Then analyzes it and calls the specific actions for the specific requests.
* Finally constructs the response mbuf and puts it back to the resp_q.
--
1.8.1.4
