[PATCH v2 3/5] rust: add methods for configure net_device

[FUJITA Tomonori <fujita.tomonori@gmail.com>]

adds methods to net::Device for the basic configurations of
net_device.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
---
 rust/helpers.c         |   7 ++
 rust/kernel/net/dev.rs | 185 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 191 insertions(+), 1 deletion(-)

diff --git a/rust/helpers.c b/rust/helpers.c
index 70d50767ff4e..6c51deb18dc1 100644
--- a/rust/helpers.c
+++ b/rust/helpers.c
@@ -22,6 +22,7 @@
 #include <linux/build_bug.h>
 #include <linux/err.h>
 #include <linux/errname.h>
+#include <linux/etherdevice.h>
 #include <linux/refcount.h>
 #include <linux/mutex.h>
 #include <linux/netdevice.h>
@@ -31,6 +32,12 @@
 #include <linux/wait.h>
 
 #ifdef CONFIG_NET
+void rust_helper_eth_hw_addr_random(struct net_device *dev)
+{
+	eth_hw_addr_random(dev);
+}
+EXPORT_SYMBOL_GPL(rust_helper_eth_hw_addr_random);
+
 void *rust_helper_netdev_priv(const struct net_device *dev)
 {
 	return netdev_priv(dev);
diff --git a/rust/kernel/net/dev.rs b/rust/kernel/net/dev.rs
index ff00616e4fef..e4d8d8260c10 100644
--- a/rust/kernel/net/dev.rs
+++ b/rust/kernel/net/dev.rs
@@ -8,9 +8,116 @@
 //! [`include/linux/skbuff.h`](../../../../include/linux/skbuff.h),
 //! [`include/uapi/linux/if_link.h`](../../../../include/uapi/linux/if_link.h).
 
-use crate::{bindings, build_error, error::*, prelude::vtable, types::ForeignOwnable};
+use crate::{bindings, build_error, error::*, prelude::vtable, str::CStr, types::ForeignOwnable};
 use {core::ffi::c_void, core::marker::PhantomData};
 
+/// Flags associated with a [`Device`].
+pub mod flags {
+    /// Interface is up.
+    pub const IFF_UP: u32 = bindings::net_device_flags_IFF_UP;
+    /// Broadcast address valid.
+    pub const IFF_BROADCAST: u32 = bindings::net_device_flags_IFF_BROADCAST;
+    /// Device on debugging.
+    pub const IFF_DEBUG: u32 = bindings::net_device_flags_IFF_DEBUG;
+    /// Loopback device.
+    pub const IFF_LOOPBACK: u32 = bindings::net_device_flags_IFF_LOOPBACK;
+    /// Has p-p link.
+    pub const IFF_POINTOPOINT: u32 = bindings::net_device_flags_IFF_POINTOPOINT;
+    /// Avoids use of trailers.
+    pub const IFF_NOTRAILERS: u32 = bindings::net_device_flags_IFF_NOTRAILERS;
+    /// Interface RFC2863 OPER_UP.
+    pub const IFF_RUNNING: u32 = bindings::net_device_flags_IFF_RUNNING;
+    /// No ARP protocol.
+    pub const IFF_NOARP: u32 = bindings::net_device_flags_IFF_NOARP;
+    /// Receives all packets.
+    pub const IFF_PROMISC: u32 = bindings::net_device_flags_IFF_PROMISC;
+    /// Receive all multicast packets.
+    pub const IFF_ALLMULTI: u32 = bindings::net_device_flags_IFF_ALLMULTI;
+    /// Master of a load balancer.
+    pub const IFF_MASTER: u32 = bindings::net_device_flags_IFF_MASTER;
+    /// Slave of a load balancer.
+    pub const IFF_SLAVE: u32 = bindings::net_device_flags_IFF_SLAVE;
+    /// Supports multicast.
+    pub const IFF_MULTICAST: u32 = bindings::net_device_flags_IFF_MULTICAST;
+    /// Capable of setting media type.
+    pub const IFF_PORTSEL: u32 = bindings::net_device_flags_IFF_PORTSEL;
+    /// Auto media select active.
+    pub const IFF_AUTOMEDIA: u32 = bindings::net_device_flags_IFF_AUTOMEDIA;
+    /// Dialup device with changing addresses.
+    pub const IFF_DYNAMIC: u32 = bindings::net_device_flags_IFF_DYNAMIC;
+}
+
+/// Private flags associated with a [`Device`].
+pub mod priv_flags {
+    /// 802.1Q VLAN device.
+    pub const IFF_802_1Q_VLAN: u64 = bindings::netdev_priv_flags_IFF_802_1Q_VLAN;
+    /// Ethernet bridging device.
+    pub const IFF_EBRIDGE: u64 = bindings::netdev_priv_flags_IFF_EBRIDGE;
+    /// Bonding master or slave device.
+    pub const IFF_BONDING: u64 = bindings::netdev_priv_flags_IFF_BONDING;
+    /// ISATAP interface (RFC4214).
+    pub const IFF_ISATAP: u64 = bindings::netdev_priv_flags_IFF_ISATAP;
+    /// WAN HDLC device.
+    pub const IFF_WAN_HDLC: u64 = bindings::netdev_priv_flags_IFF_WAN_HDLC;
+    /// dev_hard_start_xmit() is allowed to release skb->dst.
+    pub const IFF_XMIT_DST_RELEASE: u64 = bindings::netdev_priv_flags_IFF_XMIT_DST_RELEASE;
+    /// Disallows bridging this ether device.
+    pub const IFF_DONT_BRIDGE: u64 = bindings::netdev_priv_flags_IFF_DONT_BRIDGE;
+    /// Disables netpoll at run-time.
+    pub const IFF_DISABLE_NETPOLL: u64 = bindings::netdev_priv_flags_IFF_DISABLE_NETPOLL;
+    /// Device used as macvlan port.
+    pub const IFF_MACVLAN_PORT: u64 = bindings::netdev_priv_flags_IFF_MACVLAN_PORT;
+    /// Device used as bridge port.
+    pub const IFF_BRIDGE_PORT: u64 = bindings::netdev_priv_flags_IFF_BRIDGE_PORT;
+    /// Device used as Open vSwitch datapath port.
+    pub const IFF_OVS_DATAPATH: u64 = bindings::netdev_priv_flags_IFF_OVS_DATAPATH;
+    /// The interface supports sharing skbs on transmit.
+    pub const IFF_TX_SKB_SHARING: u64 = bindings::netdev_priv_flags_IFF_TX_SKB_SHARING;
+    /// Supports unicast filtering.
+    pub const IFF_UNICAST_FLT: u64 = bindings::netdev_priv_flags_IFF_UNICAST_FLT;
+    /// Device used as team port.
+    pub const IFF_TEAM_PORT: u64 = bindings::netdev_priv_flags_IFF_TEAM_PORT;
+    /// Device supports sending custom FCS.
+    pub const IFF_SUPP_NOFCS: u64 = bindings::netdev_priv_flags_IFF_SUPP_NOFCS;
+    /// Device supports hardware address change when it's running.
+    pub const IFF_LIVE_ADDR_CHANGE: u64 = bindings::netdev_priv_flags_IFF_LIVE_ADDR_CHANGE;
+    /// Macvlan device.
+    pub const IFF_MACVLAN: u64 = bindings::netdev_priv_flags_IFF_MACVLAN;
+    /// IFF_XMIT_DST_RELEASE not taking into account underlying stacked devices.
+    pub const IFF_XMIT_DST_RELEASE_PERM: u64 =
+        bindings::netdev_priv_flags_IFF_XMIT_DST_RELEASE_PERM;
+    /// L3 master device.
+    pub const IFF_L3MDEV_MASTER: u64 = bindings::netdev_priv_flags_IFF_L3MDEV_MASTER;
+    /// Device can run without qdisc attached.
+    pub const IFF_NO_QUEUE: u64 = bindings::netdev_priv_flags_IFF_NO_QUEUE;
+    /// Device is a Open vSwitch master.
+    pub const IFF_OPENVSWITCH: u64 = bindings::netdev_priv_flags_IFF_OPENVSWITCH;
+    /// Device is enslaved to an L3 master.
+    pub const IFF_L3MDEV_SLAVE: u64 = bindings::netdev_priv_flags_IFF_L3MDEV_SLAVE;
+    /// Team device.
+    pub const IFF_TEAM: u64 = bindings::netdev_priv_flags_IFF_TEAM;
+    /// Device has had Rx Flow indirection table configured.
+    pub const IFF_RXFH_CONFIGURED: u64 = bindings::netdev_priv_flags_IFF_RXFH_CONFIGURED;
+    /// The headroom value is controlled by an external entity.
+    pub const IFF_PHONY_HEADROOM: u64 = bindings::netdev_priv_flags_IFF_PHONY_HEADROOM;
+    /// MACsec device.
+    pub const IFF_MACSEC: u64 = bindings::netdev_priv_flags_IFF_MACSEC;
+    /// Device doesn't support the rx_handler hook.
+    pub const IFF_NO_RX_HANDLER: u64 = bindings::netdev_priv_flags_IFF_NO_RX_HANDLER;
+    /// Failover master device.
+    pub const IFF_FAILOVER: u64 = bindings::netdev_priv_flags_IFF_FAILOVER;
+    /// Lower device of a failover master device.
+    pub const IFF_FAILOVER_SLAVE: u64 = bindings::netdev_priv_flags_IFF_FAILOVER_SLAVE;
+    /// Only invokes the rx handler of L3 master device.
+    pub const IFF_L3MDEV_RX_HANDLER: u64 = bindings::netdev_priv_flags_IFF_L3MDEV_RX_HANDLER;
+    /// Prevents ipv6 addrconf.
+    pub const IFF_NO_ADDRCONF: u64 = bindings::netdev_priv_flags_IFF_NO_ADDRCONF;
+    /// Capable of xmitting frames with skb_headlen(skb) == 0.
+    pub const IFF_TX_SKB_NO_LINEAR: u64 = bindings::netdev_priv_flags_IFF_TX_SKB_NO_LINEAR;
+    /// Supports setting carrier via IFLA_PROTO_DOWN.
+    pub const IFF_CHANGE_PROTO_DOWN: u64 = bindings::netdev_priv_flags_IFF_CHANGE_PROTO_DOWN;
+}
+
 /// Corresponds to the kernel's `struct net_device`.
 ///
 /// # Invariants
@@ -49,6 +156,82 @@ pub fn drv_priv_data(&self) -> D::Borrowed<'_> {
             ))
         }
     }
+
+    /// Sets the name of a device.
+    pub fn set_name(&mut self, name: &CStr) -> Result {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe {
+            if name.len() > (*self.ptr).name.len() {
+                return Err(code::EINVAL);
+            }
+            (*self.ptr)
+                .name
+                .as_mut_ptr()
+                .copy_from_nonoverlapping(name.as_char_ptr(), name.len());
+        }
+        Ok(())
+    }
+
+    /// Sets carrier.
+    pub fn netif_carrier_on(&mut self) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { bindings::netif_carrier_on(self.ptr) }
+    }
+
+    /// Clears carrier.
+    pub fn netif_carrier_off(&mut self) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { bindings::netif_carrier_off(self.ptr) }
+    }
+
+    /// Sets the max mtu of the device.
+    pub fn set_max_mtu(&mut self, max_mtu: u32) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe {
+            (*self.ptr).max_mtu = max_mtu;
+        }
+    }
+
+    /// Sets the minimum mtu of the device.
+    pub fn set_min_mtu(&mut self, min_mtu: u32) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe {
+            (*self.ptr).min_mtu = min_mtu;
+        }
+    }
+
+    /// Returns the flags of the device.
+    pub fn get_flags(&self) -> u32 {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { (*self.ptr).flags }
+    }
+
+    /// Sets the flags of the device.
+    pub fn set_flags(&mut self, flags: u32) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe {
+            (*self.ptr).flags = flags;
+        }
+    }
+
+    /// Returns the priv_flags of the device.
+    pub fn get_priv_flags(&self) -> u64 {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { (*self.ptr).priv_flags }
+    }
+
+    /// Sets the priv_flags of the device.
+    pub fn set_priv_flags(&mut self, flags: u64) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { (*self.ptr).priv_flags = flags }
+    }
+
+    /// Generate a random Ethernet address (MAC) to be used by a net device
+    /// and set addr_assign_type.
+    pub fn set_random_eth_hw_addr(&mut self) {
+        // SAFETY: The type invariants guarantee that `self.ptr` is valid.
+        unsafe { bindings::eth_hw_addr_random(self.ptr) }
+    }
 }
 
 // SAFETY: `Device` is just a wrapper for the kernel`s `struct net_device`, which can be used
-- 
2.34.1