ksmbd: set RDMA capability for FSCTL_QUERY_NETWORK_INTERFACE_INFO

set RDMA capability for
FSCTL_QUERY_NETWORK_INTERFACE_INFO.
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/ksmbd/smb2pdu.c

@@ -22,6 +22,7 @@
 #include "asn1.h"
 #include "connection.h"
 #include "transport_ipc.h"
+#include "transport_rdma.h"
 #include "vfs.h"
 #include "vfs_cache.h"
 #include "misc.h"
@@ -7028,11 +7029,11 @@ static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
 				&rsp->Buffer[nbytes];
 		nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
 
-		/* TODO: specify the RDMA capabilities */
+		nii_rsp->Capability = 0;
 		if (netdev->num_tx_queues > 1)
-			nii_rsp->Capability = cpu_to_le32(RSS_CAPABLE);
-		else
-			nii_rsp->Capability = 0;
+			nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
+		if (ksmbd_rdma_capable_netdev(netdev))
+			nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
 
 		nii_rsp->Next = cpu_to_le32(152);
 		nii_rsp->Reserved = 0;

fs/ksmbd/transport_rdma.c

@@ -2033,6 +2033,20 @@ int ksmbd_rdma_destroy(void)
 	return 0;
 }
 
+bool ksmbd_rdma_capable_netdev(struct net_device *netdev)
+{
+	struct ib_device *ibdev;
+	bool rdma_capable = false;
+
+	ibdev = ib_device_get_by_netdev(netdev, RDMA_DRIVER_UNKNOWN);
+	if (ibdev) {
+		if (rdma_frwr_is_supported(&ibdev->attrs))
+			rdma_capable = true;
+		ib_device_put(ibdev);
+	}
+	return rdma_capable;
+}
+
 static struct ksmbd_transport_ops ksmbd_smb_direct_transport_ops = {
 	.prepare	= smb_direct_prepare,
 	.disconnect	= smb_direct_disconnect,

fs/ksmbd/transport_rdma.h

@@ -53,9 +53,11 @@ struct smb_direct_data_transfer {
 #ifdef CONFIG_SMB_SERVER_SMBDIRECT
 int ksmbd_rdma_init(void);
 int ksmbd_rdma_destroy(void);
+bool ksmbd_rdma_capable_netdev(struct net_device *netdev);
 #else
 static inline int ksmbd_rdma_init(void) { return 0; }
 static inline int ksmbd_rdma_destroy(void) { return 0; }
+static inline bool ksmbd_rdma_capable_netdev(struct net_device *netdev) { return false; }
 #endif
 
 #endif /* __KSMBD_TRANSPORT_RDMA_H__ */