diff options
117 files changed, 316 insertions, 665 deletions
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 2cd5b6874c7b..1669240c7a25 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -256,13 +256,6 @@ static void uml_net_tx_timeout(struct net_device *dev) netif_wake_queue(dev); } -static int uml_net_change_mtu(struct net_device *dev, int new_mtu) -{ - dev->mtu = new_mtu; - - return 0; -} - #ifdef CONFIG_NET_POLL_CONTROLLER static void uml_net_poll_controller(struct net_device *dev) { @@ -374,7 +367,6 @@ static const struct net_device_ops uml_netdev_ops = { .ndo_set_rx_mode = uml_net_set_multicast_list, .ndo_tx_timeout = uml_net_tx_timeout, .ndo_set_mac_address = eth_mac_addr, - .ndo_change_mtu = uml_net_change_mtu, .ndo_validate_addr = eth_validate_addr, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = uml_net_poll_controller, diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index d28922df01d7..a7dd5f4f2c5a 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -4248,7 +4248,6 @@ static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size) static const struct net_device_ops hdlcdev_ops = { .ndo_open = hdlcdev_open, .ndo_stop = hdlcdev_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hdlcdev_ioctl, .ndo_tx_timeout = hdlcdev_tx_timeout, diff --git a/drivers/firewire/net.c b/drivers/firewire/net.c index 309311b1faae..8430222151fc 100644 --- a/drivers/firewire/net.c +++ b/drivers/firewire/net.c @@ -1349,15 +1349,6 @@ static netdev_tx_t fwnet_tx(struct sk_buff *skb, struct net_device *net) return NETDEV_TX_OK; } -static int fwnet_change_mtu(struct net_device *net, int new_mtu) -{ - if (new_mtu < 68) - return -EINVAL; - - net->mtu = new_mtu; - return 0; -} - static const struct ethtool_ops fwnet_ethtool_ops = { .get_link = ethtool_op_get_link, }; @@ -1366,7 +1357,6 @@ static const struct net_device_ops fwnet_netdev_ops = { .ndo_open = fwnet_open, .ndo_stop = fwnet_stop, .ndo_start_xmit = fwnet_tx, - .ndo_change_mtu = fwnet_change_mtu, }; static void fwnet_init_dev(struct net_device *net) @@ -1435,7 +1425,6 @@ static int fwnet_probe(struct fw_unit *unit, struct net_device *net; bool allocated_netdev = false; struct fwnet_device *dev; - unsigned max_mtu; int ret; union fwnet_hwaddr *ha; @@ -1478,9 +1467,10 @@ static int fwnet_probe(struct fw_unit *unit, * Use the RFC 2734 default 1500 octets or the maximum payload * as initial MTU */ - max_mtu = (1 << (card->max_receive + 1)) - - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; - net->mtu = min(1500U, max_mtu); + net->max_mtu = (1 << (card->max_receive + 1)) + - sizeof(struct rfc2734_header) - IEEE1394_GASP_HDR_SIZE; + net->mtu = min(1500U, net->max_mtu); + net->min_mtu = ETH_MIN_MTU; /* Set our hardware address while we're at it */ ha = (union fwnet_hwaddr *)net->dev_addr; diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c index 6031cd146556..7ef819680acd 100644 --- a/drivers/hsi/clients/ssi_protocol.c +++ b/drivers/hsi/clients/ssi_protocol.c @@ -960,15 +960,6 @@ static int ssip_pn_stop(struct net_device *dev) return 0; } -static int ssip_pn_set_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu > SSIP_MAX_MTU || new_mtu < PHONET_MIN_MTU) - return -EINVAL; - dev->mtu = new_mtu; - - return 0; -} - static void ssip_xmit_work(struct work_struct *work) { struct ssi_protocol *ssi = @@ -1060,7 +1051,6 @@ static const struct net_device_ops ssip_pn_ops = { .ndo_open = ssip_pn_open, .ndo_stop = ssip_pn_stop, .ndo_start_xmit = ssip_pn_xmit, - .ndo_change_mtu = ssip_pn_set_mtu, }; static void ssip_pn_setup(struct net_device *dev) @@ -1136,6 +1126,10 @@ static int ssi_protocol_probe(struct device *dev) goto out1; } + /* MTU range: 6 - 65535 */ + ssi->netdev->min_mtu = PHONET_MIN_MTU; + ssi->netdev->max_mtu = SSIP_MAX_MTU; + SET_NETDEV_DEV(ssi->netdev, dev); netif_carrier_off(ssi->netdev); err = register_netdev(ssi->netdev); diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c index 35cbb17bec12..2baa45a8e401 100644 --- a/drivers/infiniband/hw/nes/nes.c +++ b/drivers/infiniband/hw/nes/nes.c @@ -65,7 +65,6 @@ MODULE_DESCRIPTION("NetEffect RNIC Low-level iWARP Driver"); MODULE_LICENSE("Dual BSD/GPL"); MODULE_VERSION(DRV_VERSION); -int max_mtu = 9000; int interrupt_mod_interval = 0; /* Interoperability */ diff --git a/drivers/infiniband/hw/nes/nes.h b/drivers/infiniband/hw/nes/nes.h index e7430c9254d3..85acd0843b50 100644 --- a/drivers/infiniband/hw/nes/nes.h +++ b/drivers/infiniband/hw/nes/nes.h @@ -83,6 +83,8 @@ #define NES_FIRST_QPN 64 #define NES_SW_CONTEXT_ALIGN 1024 +#define NES_MAX_MTU 9000 + #define NES_NIC_MAX_NICS 16 #define NES_MAX_ARP_TABLE_SIZE 4096 @@ -169,8 +171,6 @@ do { \ #include "nes_cm.h" #include "nes_mgt.h" -extern int max_mtu; -#define max_frame_len (max_mtu+ETH_HLEN) extern int interrupt_mod_interval; extern int nes_if_count; extern int mpa_version; diff --git a/drivers/infiniband/hw/nes/nes_nic.c b/drivers/infiniband/hw/nes/nes_nic.c index 2b27d1351cf7..7f8597d6738b 100644 --- a/drivers/infiniband/hw/nes/nes_nic.c +++ b/drivers/infiniband/hw/nes/nes_nic.c @@ -981,20 +981,16 @@ static int nes_netdev_change_mtu(struct net_device *netdev, int new_mtu) { struct nes_vnic *nesvnic = netdev_priv(netdev); struct nes_device *nesdev = nesvnic->nesdev; - int ret = 0; u8 jumbomode = 0; u32 nic_active; u32 nic_active_bit; u32 uc_all_active; u32 mc_all_active; - if ((new_mtu < ETH_ZLEN) || (new_mtu > max_mtu)) - return -EINVAL; - netdev->mtu = new_mtu; nesvnic->max_frame_size = new_mtu + VLAN_ETH_HLEN; - if (netdev->mtu > 1500) { + if (netdev->mtu > ETH_DATA_LEN) { jumbomode=1; } nes_nic_init_timer_defaults(nesdev, jumbomode); @@ -1020,7 +1016,7 @@ static int nes_netdev_change_mtu(struct net_device *netdev, int new_mtu) nes_write_indexed(nesdev, NES_IDX_NIC_UNICAST_ALL, nic_active); } - return ret; + return 0; } @@ -1658,7 +1654,7 @@ struct net_device *nes_netdev_init(struct nes_device *nesdev, netdev->watchdog_timeo = NES_TX_TIMEOUT; netdev->irq = nesdev->pcidev->irq; - netdev->mtu = ETH_DATA_LEN; + netdev->max_mtu = NES_MAX_MTU; netdev->hard_header_len = ETH_HLEN; netdev->addr_len = ETH_ALEN; netdev->type = ARPHRD_ETHER; diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index cc059218c962..ae5d7cd100a5 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -2017,6 +2017,7 @@ static struct net_device *ipoib_add_port(const char *format, /* MTU will be reset when mcast join happens */ priv->dev->mtu = IPOIB_UD_MTU(priv->max_ib_mtu); priv->mcast_mtu = priv->admin_mtu = priv->dev->mtu; + priv->dev->max_mtu = IPOIB_CM_MTU; priv->dev->neigh_priv_len = sizeof(struct ipoib_neigh); diff --git a/drivers/message/fusion/mptlan.c b/drivers/message/fusion/mptlan.c index 6955c9e22d57..55dd71bbdc2a 100644 --- a/drivers/message/fusion/mptlan.c +++ b/drivers/message/fusion/mptlan.c @@ -549,16 +549,6 @@ mpt_lan_close(struct net_device *dev) } /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ -static int -mpt_lan_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < MPT_LAN_MIN_MTU) || (new_mtu > MPT_LAN_MAX_MTU)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - -/*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ /* Tx timeout handler. */ static void mpt_lan_tx_timeout(struct net_device *dev) @@ -1304,7 +1294,6 @@ static const struct net_device_ops mpt_netdev_ops = { .ndo_open = mpt_lan_open, .ndo_stop = mpt_lan_close, .ndo_start_xmit = mpt_lan_sdu_send, - .ndo_change_mtu = mpt_lan_change_mtu, .ndo_tx_timeout = mpt_lan_tx_timeout, }; @@ -1375,6 +1364,10 @@ mpt_register_lan_device (MPT_ADAPTER *mpt_dev, int pnum) dev->netdev_ops = &mpt_netdev_ops; dev->watchdog_timeo = MPT_LAN_TX_TIMEOUT; + /* MTU range: 96 - 65280 */ + dev->min_mtu = MPT_LAN_MIN_MTU; + dev->max_mtu = MPT_LAN_MAX_MTU; + dlprintk((KERN_INFO MYNAM ": Finished registering dev " "and setting initial values\n")); diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c index 557f9782c53c..0c26eaf5f62b 100644 --- a/drivers/misc/sgi-xp/xpnet.c +++ b/drivers/misc/sgi-xp/xpnet.c @@ -118,6 +118,8 @@ static DEFINE_SPINLOCK(xpnet_broadcast_lock); * now, the default is 64KB. */ #define XPNET_MAX_MTU (0x800000UL - L1_CACHE_BYTES) +/* 68 comes from min TCP+IP+MAC header */ +#define XPNET_MIN_MTU 68 /* 32KB has been determined to be the ideal */ #define XPNET_DEF_MTU (0x8000UL) @@ -330,22 +332,6 @@ xpnet_dev_stop(struct net_device *dev) return 0; } -static int -xpnet_dev_change_mtu(struct net_device *dev, int new_mtu) -{ - /* 68 comes from min TCP+IP+MAC header */ - if ((new_mtu < 68) || (new_mtu > XPNET_MAX_MTU)) { - dev_err(xpnet, "ifconfig %s mtu %d failed; value must be " - "between 68 and %ld\n", dev->name, new_mtu, - XPNET_MAX_MTU); - return -EINVAL; - } - - dev->mtu = new_mtu; - dev_dbg(xpnet, "ifconfig %s mtu set to %d\n", dev->name, new_mtu); - return 0; -} - /* * Notification that the other end has received the message and * DMA'd the skb information. At this point, they are done with @@ -519,7 +505,6 @@ static const struct net_device_ops xpnet_netdev_ops = { .ndo_open = xpnet_dev_open, .ndo_stop = xpnet_dev_stop, .ndo_start_xmit = xpnet_dev_hard_start_xmit, - .ndo_change_mtu = xpnet_dev_change_mtu, .ndo_tx_timeout = xpnet_dev_tx_timeout, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, @@ -555,6 +540,8 @@ xpnet_init(void) xpnet_device->netdev_ops = &xpnet_netdev_ops; xpnet_device->mtu = XPNET_DEF_MTU; + xpnet_device->min_mtu = XPNET_MIN_MTU; + xpnet_device->max_mtu = XPNET_MAX_MTU; /* * Multicast assumes the LSB of the first octet is set for multicast diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c index b90a26b13fdf..a5c1e290677a 100644 --- a/drivers/net/ethernet/alteon/acenic.c +++ b/drivers/net/ethernet/alteon/acenic.c @@ -474,6 +474,8 @@ static int acenic_probe_one(struct pci_dev *pdev, dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; dev->watchdog_timeo = 5*HZ; + dev->min_mtu = 0; + dev->max_mtu = ACE_JUMBO_MTU; dev->netdev_ops = &ace_netdev_ops; dev->ethtool_ops = &ace_ethtool_ops; @@ -2548,9 +2550,6 @@ static int ace_change_mtu(struct net_device *dev, int new_mtu) struct ace_private *ap = netdev_priv(dev); struct ace_regs __iomem *regs = ap->regs; - if (new_mtu > ACE_JUMBO_MTU) - return -EINVAL; - writel(new_mtu + ETH_HLEN + 4, ®s->IfMtu); dev->mtu = new_mtu; diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c index bfeaec5bd7b9..2a55ab00686a 100644 --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c @@ -103,13 +103,6 @@ static int ena_change_mtu(struct net_device *dev, int new_mtu) struct ena_adapter *adapter = netdev_priv(dev); int ret; - if ((new_mtu > adapter->max_mtu) || (new_mtu < ENA_MIN_MTU)) { - netif_err(adapter, drv, dev, - "Invalid MTU setting. new_mtu: %d\n", new_mtu); - - return -EINVAL; - } - ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu); if (!ret) { netif_dbg(adapter, drv, dev, "set MTU to %d\n", new_mtu); @@ -2755,6 +2748,8 @@ static void ena_set_conf_feat_params(struct ena_adapter *adapter, ena_set_dev_offloads(feat, netdev); adapter->max_mtu = feat->dev_attr.max_mtu; + netdev->max_mtu = adapter->max_mtu; + netdev->min_mtu = ENA_MIN_MTU; } static int ena_rss_init_default(struct ena_adapter *adapter) diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c index 7f9216db026f..c4e668208e04 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -257,11 +257,6 @@ static int xgbe_calc_rx_buf_size(struct net_device *netdev, unsigned int mtu) { unsigned int rx_buf_size; - if (mtu > XGMAC_JUMBO_PACKET_MTU) { - netdev_alert(netdev, "MTU exceeds maximum supported value\n"); - return -EINVAL; - } - rx_buf_size = mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; rx_buf_size = clamp_val(rx_buf_size, XGBE_RX_MIN_BUF_SIZE, PAGE_SIZE); diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-main.c b/drivers/net/ethernet/amd/xgbe/xgbe-main.c index 9de078819aa6..667e1209a2f5 100644 --- a/drivers/net/ethernet/amd/xgbe/xgbe-main.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-main.c @@ -738,6 +738,8 @@ static int xgbe_probe(struct platform_device *pdev) pdata->netdev_features = netdev->features; netdev->priv_flags |= IFF_UNICAST_FLT; + netdev->min_mtu = 0; + netdev->max_mtu = XGMAC_JUMBO_PACKET_MTU; /* Use default watchdog timeout */ netdev->watchdog_timeo = 0; diff --git a/drivers/net/ethernet/broadcom/sb1250-mac.c b/drivers/net/ethernet/broadcom/sb1250-mac.c index f1b81187a201..cb312e4c89f4 100644 --- a/drivers/net/ethernet/broadcom/sb1250-mac.c +++ b/drivers/net/ethernet/broadcom/sb1250-mac.c @@ -2147,15 +2147,6 @@ static void sbmac_setmulti(struct sbmac_softc *sc) } } -static int sb1250_change_mtu(struct net_device *_dev, int new_mtu) -{ - if (new_mtu > ENET_PACKET_SIZE) - return -EINVAL; - _dev->mtu = new_mtu; - pr_info("changing the mtu to %d\n", new_mtu); - return 0; -} - static const struct net_device_ops sbmac_netdev_ops = { .ndo_open = sbmac_open, .ndo_stop = sbmac_close, @@ -2163,7 +2154,6 @@ static const struct net_device_ops sbmac_netdev_ops = { .ndo_set_rx_mode = sbmac_set_rx_mode, .ndo_tx_timeout = sbmac_tx_timeout, .ndo_do_ioctl = sbmac_mii_ioctl, - .ndo_change_mtu = sb1250_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, #ifdef CONFIG_NET_POLL_CONTROLLER @@ -2229,6 +2219,8 @@ static int sbmac_init(struct platform_device *pldev, long long base) dev->netdev_ops = &sbmac_netdev_ops; dev->watchdog_timeo = TX_TIMEOUT; + dev->max_mtu = 0; + dev->max_mtu = ENET_PACKET_SIZE; netif_napi_add(dev, &sc->napi, sbmac_poll, 16); diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c index 43da891fab97..092b3c16440b 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c +++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c @@ -2531,8 +2531,6 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu) struct adapter *adapter = pi->adapter; int ret; - if (new_mtu < 81) /* accommodate SACK */ - return -EINVAL; if ((ret = t3_mac_set_mtu(&pi->mac, new_mtu))) return ret; dev->mtu = new_mtu; @@ -3295,6 +3293,8 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->netdev_ops = &cxgb_netdev_ops; netdev->ethtool_ops = &cxgb_ethtool_ops; + netdev->min_mtu = 81; + netdev->max_mtu = ETH_MAX_MTU; } pci_set_drvdata(pdev, adapter); diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c index f320497368f4..b0bb23f95beb 100644 --- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c @@ -2502,8 +2502,6 @@ static int cxgb_change_mtu(struct net_device *dev, int new_mtu) int ret; struct port_info *pi = netdev_priv(dev); - if (new_mtu < 81 || new_mtu > MAX_MTU) /* accommodate SACK */ - return -EINVAL; ret = t4_set_rxmode(pi->adapter, pi->adapter->pf, pi->viid, new_mtu, -1, -1, -1, -1, true); if (!ret) @@ -4803,6 +4801,10 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent) netdev->priv_flags |= IFF_UNICAST_FLT; + /* MTU range: 81 - 9600 */ + netdev->min_mtu = 81; + netdev->max_mtu = MAX_MTU; + netdev->netdev_ops = &cxgb4_netdev_ops; #ifdef CONFIG_CHELSIO_T4_DCB netdev->dcbnl_ops = &cxgb4_dcb_ops; diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c index 100b2cc064a3..5d4da0e8acaa 100644 --- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c +++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c @@ -1108,10 +1108,6 @@ static int cxgb4vf_change_mtu(struct net_device *dev, int new_mtu) int ret; struct port_info *pi = netdev_priv(dev); - /* accommodate SACK */ - if (new_mtu < 81) - return -EINVAL; - ret = t4vf_set_rxmode(pi->adapter, pi->viid, new_mtu, -1, -1, -1, -1, true); if (!ret) @@ -2966,6 +2962,8 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev, netdev->features |= NETIF_F_HIGHDMA; netdev->priv_flags |= IFF_UNICAST_FLT; + netdev->min_mtu = 81; + netdev->max_mtu = ETH_MAX_MTU; netdev->netdev_ops = &cxgb4vf_netdev_ops; netdev->ethtool_ops = &cxgb4vf_ethtool_ops; diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index cece8a08edca..3f6152cc648c 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -1406,23 +1406,6 @@ drop: return NETDEV_TX_OK; } -static int be_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct be_adapter *adapter = netdev_priv(netdev); - struct device *dev = &adapter->pdev->dev; - - if (new_mtu < BE_MIN_MTU || new_mtu > BE_MAX_MTU) { - dev_info(dev, "MTU must be between %d and %d bytes\n", - BE_MIN_MTU, BE_MAX_MTU); - return -EINVAL; - } - - dev_info(dev, "MTU changed from %d to %d bytes\n", - netdev->mtu, new_mtu); - netdev->mtu = new_mtu; - return 0; -} - static inline bool be_in_all_promisc(struct be_adapter *adapter) { return (adapter->if_flags & BE_IF_FLAGS_ALL_PROMISCUOUS) == @@ -5216,7 +5199,6 @@ static const struct net_device_ops be_netdev_ops = { .ndo_start_xmit = be_xmit, .ndo_set_rx_mode = be_set_rx_mode, .ndo_set_mac_address = be_mac_addr_set, - .ndo_change_mtu = be_change_mtu, .ndo_get_stats64 = be_get_stats64, .ndo_validate_addr = eth_validate_addr, .ndo_vlan_rx_add_vid = be_vlan_add_vid, @@ -5266,6 +5248,10 @@ static void be_netdev_init(struct net_device *netdev) netdev->netdev_ops = &be_netdev_ops; netdev->ethtool_ops = &be_ethtool_ops; + + /* MTU range: 256 - 9000 */ + netdev->min_mtu = BE_MIN_MTU; + netdev->max_mtu = BE_MAX_MTU; } static void be_cleanup(struct be_adapter *adapter) diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index ebe60719e489..29c05d0d79a9 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1349,9 +1349,6 @@ static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) int i, rc; int need_restart = 0; - if (new_mtu < IBMVETH_MIN_MTU) - return -EINVAL; - for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) if (new_mtu_oh <= adapter->rx_buff_pool[i].buff_size) break; @@ -1551,6 +1548,9 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) netdev->hw_features |= NETIF_F_TSO; } + netdev->min_mtu = IBMVETH_MIN_MTU; + netdev->min_mtu = ETH_MAX_MTU; + memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN); if (firmware_has_feature(FW_FEATURE_CMO)) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index bfe17d9c022d..657206be7ba9 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -902,17 +902,6 @@ static int ibmvnic_set_mac(struct net_device *netdev, void *p) return 0; } -static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) -{ - struct ibmvnic_adapter *adapter = netdev_priv(netdev); - - if (new_mtu > adapter->req_mtu || new_mtu < adapter->min_mtu) - return -EINVAL; - - netdev->mtu = new_mtu; - return 0; -} - static void ibmvnic_tx_timeout(struct net_device *dev) { struct ibmvnic_adapter *adapter = netdev_priv(dev); @@ -1029,7 +1018,6 @@ static const struct net_device_ops ibmvnic_netdev_ops = { .ndo_set_rx_mode = ibmvnic_set_multi, .ndo_set_mac_address = ibmvnic_set_mac, .ndo_validate_addr = eth_validate_addr, - .ndo_change_mtu = ibmvnic_change_mtu, .ndo_tx_timeout = ibmvnic_tx_timeout, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = ibmvnic_netpoll_controller, @@ -2638,10 +2626,12 @@ static void handle_query_cap_rsp(union ibmvnic_crq *crq, break; case MIN_MTU: adapter->min_mtu = be64_to_cpu(crq->query_capability.number); + netdev->min_mtu = adapter->min_mtu; netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); break; case MAX_MTU: adapter->max_mtu = be64_to_cpu(crq->query_capability.number); + netdev->max_mtu = adapter->max_mtu; netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); break; case MAX_MULTICAST_FILTERS: @@ -3654,6 +3644,8 @@ static void handle_crq_init_rsp(struct work_struct *work) goto task_failed; netdev->real_num_tx_queues = adapter->req_tx_queues; + netdev->min_mtu = adapter->min_mtu; + netdev->max_mtu = adapter->max_mtu; if (adapter->failover) { adapter->failover = false; diff --git a/drivers/net/ethernet/jme.c b/drivers/net/ethernet/jme.c index 836ebd8ee768..f9fcab54783c 100644 --- a/drivers/net/ethernet/jme.c +++ b/drivers/net/ethernet/jme.c @@ -2357,14 +2357,6 @@ jme_change_mtu(struct net_device *netdev, int new_mtu) { struct jme_adapter *jme = netdev_priv(netdev); - if (new_mtu == jme->old_mtu) - return 0; - - if (((new_mtu + ETH_HLEN) > MAX_ETHERNET_JUMBO_PACKET_SIZE) || - ((new_mtu) < IPV6_MIN_MTU)) - return -EINVAL; - - netdev->mtu = new_mtu; netdev_update_features(netdev); @@ -3063,6 +3055,10 @@ jme_init_one(struct pci_dev *pdev, if (using_dac) netdev->features |= NETIF_F_HIGHDMA; + /* MTU range: 1280 - 9202*/ + netdev->min_mtu = IPV6_MIN_MTU; + netdev->max_mtu = MAX_ETHERNET_JUMBO_PACKET_SIZE - ETH_HLEN; + SET_NETDEV_DEV(netdev, &pdev->dev); pci_set_drvdata(pdev, netdev); diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c index 18e6bb6e3867..68675d83bdc5 100644 --- a/drivers/net/ethernet/marvell/mv643xx_eth.c +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c @@ -2585,9 +2585,6 @@ static int mv643xx_eth_change_mtu(struct net_device *dev, int new_mtu) { struct mv643xx_eth_private *mp = netdev_priv(dev); - if (new_mtu < 64 || new_mtu > 9500) - return -EINVAL; - dev->mtu = new_mtu; mv643xx_eth_recalc_skb_size(mp); tx_set_rate(mp, 1000000000, 16777216); @@ -3206,6 +3203,10 @@ static int mv643xx_eth_probe(struct platform_device *pdev) dev->priv_flags |= IFF_UNICAST_FLT; dev->gso_max_segs = MV643XX_MAX_TSO_SEGS; + /* MTU range: 64 - 9500 */ + dev->min_mtu = 64; + dev->max_mtu = 9500; + SET_NETDEV_DEV(dev, &pdev->dev); if (mp->shared->win_protect) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c index 99805fd3d110..6d8cb22579ee 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c @@ -2284,6 +2284,9 @@ static int mlxsw_sp_port_create(struct mlxsw_sp *mlxsw_sp, u8 local_port, NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_TC; dev->hw_features |= NETIF_F_HW_TC; + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; + /* Each packet needs to have a Tx header (metadata) on top all other * headers. */ diff --git a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c index c0c23e2f3275..66af63d99b8b 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c +++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c @@ -994,6 +994,9 @@ static int mlxsw_sx_port_create(struct mlxsw_sx *mlxsw_sx, u8 local_port) dev->features |= NETIF_F_NETNS_LOCAL | NETIF_F_LLTX | NETIF_F_SG | NETIF_F_VLAN_CHALLENGED; + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; + /* Each packet needs to have a Tx header (metadata) on top all other * headers. */ diff --git a/drivers/net/ethernet/natsemi/ns83820.c b/drivers/net/ethernet/natsemi/ns83820.c index 569ade6cf85c..a34631ed741d 100644 --- a/drivers/net/ethernet/natsemi/ns83820.c +++ b/drivers/net/ethernet/natsemi/ns83820.c @@ -1679,14 +1679,6 @@ static void ns83820_getmac(struct ns83820 *dev, u8 *mac) } } -static int ns83820_change_mtu(struct net_device *ndev, int new_mtu) -{ - if (new_mtu > RX_BUF_SIZE) - return -EINVAL; - ndev->mtu = new_mtu; - return 0; -} - static void ns83820_set_multicast(struct net_device *ndev) { struct ns83820 *dev = PRIV(ndev); @@ -1933,7 +1925,6 @@ static const struct net_device_ops netdev_ops = { .ndo_stop = ns83820_stop, .ndo_start_xmit = ns83820_hard_start_xmit, .ndo_get_stats = ns83820_get_stats, - .ndo_change_mtu = ns83820_change_mtu, .ndo_set_rx_mode = ns83820_set_multicast, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, @@ -2190,6 +2181,8 @@ static int ns83820_init_one(struct pci_dev *pci_dev, ndev->features |= NETIF_F_SG; ndev->features |= NETIF_F_IP_CSUM; + ndev->min_mtu = 0; + #ifdef NS83820_VLAN_ACCEL_SUPPORT /* We also support hardware vlan acceleration */ ndev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX; diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c index 2b10f1bcd151..a996801d442d 100644 --- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c +++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c @@ -987,20 +987,8 @@ int netxen_send_lro_cleanup(struct netxen_adapter *adapter) int netxen_nic_change_mtu(struct net_device *netdev, int mtu) { struct netxen_adapter *adapter = netdev_priv(netdev); - int max_mtu; int rc = 0; - if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) - max_mtu = P3_MAX_MTU; - else - max_mtu = P2_MAX_MTU; - - if (mtu > max_mtu) { - printk(KERN_ERR "%s: mtu > %d bytes unsupported\n", - netdev->name, max_mtu); - return -EINVAL; - } - if (adapter->set_mtu) rc = adapter->set_mtu(adapter, mtu); diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c index 7a0281a36c28..561fb94c7267 100644 --- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c +++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c @@ -1572,6 +1572,13 @@ netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) adapter->physical_port = i; } + /* MTU range: 0 - 8000 (P2) or 9600 (P3) */ + netdev->min_mtu = 0; + if (NX_IS_REVISION_P3(adapter->ahw.revision_id)) + netdev->max_mtu = P3_MAX_MTU; + else + netdev->max_mtu = P2_MAX_MTU; + netxen_nic_clear_stats(adapter); err = netxen_setup_intr(adapter); diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c index fd4a8e473f11..1409412ab39d 100644 --- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c +++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c @@ -4788,6 +4788,13 @@ static int qlge_probe(struct pci_dev *pdev, ndev->ethtool_ops = &qlge_ethtool_ops; ndev->watchdog_timeo = 10 * HZ; + /* MTU range: this driver only supports 1500 or 9000, so this only + * filters out values above or below, and we'll rely on + * qlge_change_mtu to make sure only 1500 or 9000 are allowed + */ + ndev->min_mtu = ETH_DATA_LEN; + ndev->max_mtu = 9000; + err = register_netdev(ndev); if (err) { dev_err(&pdev->dev, "net device registration failed.\n"); diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index 9bf3b2b82e95..e4e1925d18a4 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -239,15 +239,8 @@ static void emac_rx_mode_set(struct net_device *netdev) /* Change the Maximum Transfer Unit (MTU) */ static int emac_change_mtu(struct net_device *netdev, int new_mtu) { - unsigned int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; struct emac_adapter *adpt = netdev_priv(netdev); - if ((max_frame < EMAC_MIN_ETH_FRAME_SIZE) || - (max_frame > EMAC_MAX_ETH_FRAME_SIZE)) { - netdev_err(adpt->netdev, "error: invalid MTU setting\n"); - return -EINVAL; - } - netif_info(adpt, hw, adpt->netdev, "changing MTU from %d to %d\n", netdev->mtu, new_mtu); @@ -679,6 +672,12 @@ static int emac_probe(struct platform_device *pdev) netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_TSO | NETIF_F_TSO6; + /* MTU range: 46 - 9194 */ + netdev->min_mtu = EMAC_MIN_ETH_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); + netdev->max_mtu = EMAC_MAX_ETH_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); + INIT_WORK(&adpt->work_thread, emac_work_thread); /* Initialize queues */ diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c index c688d68c39aa..c9c8a3be9f1b 100644 --- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c +++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c @@ -1034,9 +1034,6 @@ static int axienet_change_mtu(struct net_device *ndev, int new_mtu) XAE_TRL_SIZE) > lp->rxmem) return -EINVAL; - if ((new_mtu > XAE_JUMBO_MTU) || (new_mtu < 64)) - return -EINVAL; - ndev->mtu = new_mtu; return 0; @@ -1475,6 +1472,10 @@ static int axienet_probe(struct platform_device *pdev) ndev->netdev_ops = &axienet_netdev_ops; ndev->ethtool_ops = &axienet_ethtool_ops; + /* MTU range: 64 - 9000 */ + ndev->min_mtu = 64; + ndev->max_mtu = XAE_JUMBO_MTU; + lp = netdev_priv(ndev); lp->ndev = ndev; lp->dev = &pdev->dev; diff --git a/drivers/net/fddi/skfp/skfddi.c b/drivers/net/fddi/skfp/skfddi.c index 51acc6d86e91..3a639180e4a0 100644 --- a/drivers/net/fddi/skfp/skfddi.c +++ b/drivers/net/fddi/skfp/skfddi.c @@ -166,7 +166,6 @@ static const struct net_device_ops skfp_netdev_ops = { .ndo_stop = skfp_close, .ndo_start_xmit = skfp_send_pkt, .ndo_get_stats = skfp_ctl_get_stats, - .ndo_change_mtu = fddi_change_mtu, .ndo_set_rx_mode = skfp_ctl_set_multicast_list, .ndo_set_mac_address = skfp_ctl_set_mac_address, .ndo_do_ioctl = skfp_ioctl, diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c index f36eb4ad40b7..b77e4ecf3cf2 100644 --- a/drivers/net/fjes/fjes_main.c +++ b/drivers/net/fjes/fjes_main.c @@ -1316,6 +1316,8 @@ static void fjes_netdev_setup(struct net_device *netdev) netdev->netdev_ops = &fjes_netdev_ops; fjes_set_ethtool_ops(netdev); netdev->mtu = fjes_support_mtu[3]; + netdev->min_mtu = fjes_support_mtu[0]; + netdev->max_mtu = fjes_support_mtu[3]; netdev->flags |= IFF_BROADCAST; netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER; } diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 3c20e87bb761..752bcaa852e4 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -1034,39 +1034,18 @@ static netdev_tx_t geneve_xmit(struct sk_buff *skb, struct net_device *dev) return geneve_xmit_skb(skb, dev, info); } -static int __geneve_change_mtu(struct net_device *dev, int new_mtu, bool strict) +static int geneve_change_mtu(struct net_device *dev, int new_mtu) { - struct geneve_dev *geneve = netdev_priv(dev); - /* The max_mtu calculation does not take account of GENEVE - * options, to avoid excluding potentially valid - * configurations. + /* Only possible if called internally, ndo_change_mtu path's new_mtu + * is guaranteed to be between dev->min_mtu and dev->max_mtu. */ - int max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; - - if (geneve->remote.sa.sa_family == AF_INET6) - max_mtu -= sizeof(struct ipv6hdr); - else - max_mtu -= sizeof(struct iphdr); - - if (new_mtu < 68) - return -EINVAL; - - if (new_mtu > max_mtu) { - if (strict) - return -EINVAL; - - new_mtu = max_mtu; - } + if (new_mtu > dev->max_mtu) + new_mtu = dev->max_mtu; dev->mtu = new_mtu; return 0; } -static int geneve_change_mtu(struct net_device *dev, int new_mtu) -{ - return __geneve_change_mtu(dev, new_mtu, true); -} - static int geneve_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) { struct ip_tunnel_info *info = skb_tunnel_info(skb); @@ -1170,6 +1149,14 @@ static void geneve_setup(struct net_device *dev) dev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM; dev->hw_features |= NETIF_F_GSO_SOFTWARE; + /* MTU range: 68 - (something less than 65535) */ + dev->min_mtu = ETH_MIN_MTU; + /* The max_mtu calculation does not take account of GENEVE + * options, to avoid excluding potentially valid + * configurations. This will be further reduced by IPvX hdr size. + */ + dev->max_mtu = IP_MAX_MTU - GENEVE_BASE_HLEN - dev->hard_header_len; + netif_keep_dst(dev); dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_NO_QUEUE; @@ -1285,10 +1272,13 @@ static int geneve_configure(struct net *net, struct net_device *dev, /* make enough headroom for basic scenario */ encap_len = GENEVE_BASE_HLEN + ETH_HLEN; - if (remote->sa.sa_family == AF_INET) + if (remote->sa.sa_family == AF_INET) { encap_len += sizeof(struct iphdr); - else + dev->max_mtu -= sizeof(struct iphdr); + } else { encap_len += sizeof(struct ipv6hdr); + dev->max_mtu -= sizeof(struct ipv6hdr); + } dev->needed_headroom = encap_len + ETH_HLEN; if (metadata) { @@ -1488,7 +1478,7 @@ struct net_device *geneve_dev_create_fb(struct net *net, const char *name, /* openvswitch users expect packet sizes to be unrestricted, * so set the largest MTU we can. */ - err = __geneve_change_mtu(dev, IP_MAX_MTU, false); + err = geneve_change_mtu(dev, IP_MAX_MTU); if (err) goto err; diff --git a/drivers/net/hippi/rrunner.c b/drivers/net/hippi/rrunner.c index 95c0b45a68fb..f5a9728b89f3 100644 --- a/drivers/net/hippi/rrunner.c +++ b/drivers/net/hippi/rrunner.c @@ -68,7 +68,6 @@ static const struct net_device_ops rr_netdev_ops = { .ndo_stop = rr_close, .ndo_do_ioctl = rr_ioctl, .ndo_start_xmit = rr_start_xmit, - .ndo_change_mtu = hippi_change_mtu, .ndo_set_mac_address = hippi_mac_addr, }; diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index f4fbcb5aa24a..3958adade7eb 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -606,8 +606,8 @@ struct nvsp_message { } __packed; -#define NETVSC_MTU 65536 -#define NETVSC_MTU_MIN 68 +#define NETVSC_MTU 65535 +#define NETVSC_MTU_MIN ETH_MIN_MTU #define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */ #define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */ diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index f0919bd3a563..3b28cf127f9d 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -872,19 +872,12 @@ static int netvsc_change_mtu(struct net_device *ndev, int mtu) struct netvsc_device *nvdev = ndevctx->nvdev; struct hv_device *hdev = ndevctx->device_ctx; struct netvsc_device_info device_info; - int limit = ETH_DATA_LEN; u32 num_chn; int ret = 0; if (ndevctx->start_remove || !nvdev || nvdev->destroy) return -ENODEV; - if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) - limit = NETVSC_MTU - ETH_HLEN; - - if (mtu < NETVSC_MTU_MIN || mtu > limit) - return -EINVAL; - ret = netvsc_close(ndev); if (ret) goto out; @@ -1402,6 +1395,13 @@ static int netvsc_probe(struct hv_device *dev, netif_set_real_num_tx_queues(net, nvdev->num_chn); netif_set_real_num_rx_queues(net, nvdev->num_chn); + /* MTU range: 68 - 1500 or 65521 */ + net->min_mtu = NETVSC_MTU_MIN; + if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) + net->max_mtu = NETVSC_MTU - ETH_HLEN; + else + net->max_mtu = ETH_DATA_LEN; + ret = register_netdev(net); if (ret != 0) { pr_err("Unable to register netdev.\n"); diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 3ea47f28e143..1a134cb2d52c 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -2970,6 +2970,8 @@ static void macsec_free_netdev(struct net_device *dev) static void macsec_setup(struct net_device *dev) { ether_setup(dev); + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; dev->priv_flags |= IFF_NO_QUEUE; dev->netdev_ops = &macsec_netdev_ops; dev->destructor = macsec_free_netdev; diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index 3234fcdea317..a0644158647a 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -777,7 +777,7 @@ static int macvlan_change_mtu(struct net_device *dev, int new_mtu) { struct macvlan_dev *vlan = netdev_priv(dev); - if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) + if (vlan->lowerdev->mtu < new_mtu) return -EINVAL; dev->mtu = new_mtu; return 0; @@ -1085,6 +1085,8 @@ void macvlan_common_setup(struct net_device *dev) { ether_setup(dev); + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; dev->priv_flags &= ~IFF_TX_SKB_SHARING; netif_keep_dst(dev); dev->priv_flags |= IFF_UNICAST_FLT; @@ -1297,6 +1299,10 @@ int macvlan_common_newlink(struct net *src_net, struct net_device *dev, else if (dev->mtu > lowerdev->mtu) return -EINVAL; + /* MTU range: 68 - lowerdev->max_mtu */ + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = lowerdev->max_mtu; + if (!tb[IFLA_ADDRESS]) eth_hw_addr_random(dev); diff --git a/drivers/net/ntb_netdev.c b/drivers/net/ntb_netdev.c index a9acf7156855..36877ba65516 100644 --- a/drivers/net/ntb_netdev.c +++ b/drivers/net/ntb_netdev.c @@ -433,6 +433,9 @@ static int ntb_netdev_probe(struct device *client_dev) ndev->netdev_ops = &ntb_netdev_ops; ndev->ethtool_ops = &ntb_ethtool_ops; + ndev->min_mtu = 0; + ndev->max_mtu = ETH_MAX_MTU; + dev->qp = ntb_transport_create_queue(ndev, client_dev, &ntb_netdev_handlers); if (!dev->qp) { diff --git a/drivers/net/rionet.c b/drivers/net/rionet.c index a31f4610b493..300bb1479b3a 100644 --- a/drivers/net/rionet.c +++ b/drivers/net/rionet.c @@ -466,17 +466,6 @@ static void rionet_set_msglevel(struct net_device *ndev, u32 value) rnet->msg_enable = value; } -static int rionet_change_mtu(struct net_device *ndev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > RIONET_MAX_MTU)) { - printk(KERN_ERR "%s: Invalid MTU size %d\n", - ndev->name, new_mtu); - return -EINVAL; - } - ndev->mtu = new_mtu; - return 0; -} - static const struct ethtool_ops rionet_ethtool_ops = { .get_drvinfo = rionet_get_drvinfo, .get_msglevel = rionet_get_msglevel, @@ -488,7 +477,6 @@ static const struct net_device_ops rionet_netdev_ops = { .ndo_open = rionet_open, .ndo_stop = rionet_close, .ndo_start_xmit = rionet_start_xmit, - .ndo_change_mtu = rionet_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, }; @@ -525,6 +513,9 @@ static int rionet_setup_netdev(struct rio_mport *mport, struct net_device *ndev) ndev->netdev_ops = &rionet_netdev_ops; ndev->mtu = RIONET_MAX_MTU; + /* MTU range: 68 - 4082 */ + ndev->min_mtu = ETH_MIN_MTU; + ndev->max_mtu = RIONET_MAX_MTU; ndev->features = NETIF_F_LLTX; SET_NETDEV_DEV(ndev, &mport->dev); ndev->ethtool_ops = &rionet_ethtool_ops; diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c index 9ed6d1c1ee45..7e933d8ff811 100644 --- a/drivers/net/slip/slip.c +++ b/drivers/net/slip/slip.c @@ -561,12 +561,7 @@ static int sl_change_mtu(struct net_device *dev, int new_mtu) { struct slip *sl = netdev_priv(dev); - if (new_mtu < 68 || new_mtu > 65534) - return -EINVAL; - - if (new_mtu != dev->mtu) - return sl_realloc_bufs(sl, new_mtu); - return 0; + return sl_realloc_bufs(sl, new_mtu); } /* Netdevice get statistics request */ @@ -663,6 +658,10 @@ static void sl_setup(struct net_device *dev) dev->addr_len = 0; dev->tx_queue_len = 10; + /* MTU range: 68 - 65534 */ + dev->min_mtu = 68; + dev->max_mtu = 65534; + /* New-style flags. */ dev->flags = IFF_NOARP|IFF_POINTOPOINT|IFF_MULTICAST; } diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 8093e39ae263..93285687cf13 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -925,18 +925,6 @@ static void tun_net_mclist(struct net_device *dev) */ } -#define MIN_MTU 68 -#define MAX_MTU 65535 - -static int -tun_net_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < MIN_MTU || new_mtu + dev->hard_header_len > MAX_MTU) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static netdev_features_t tun_net_fix_features(struct net_device *dev, netdev_features_t features) { @@ -1014,7 +1002,6 @@ static const struct net_device_ops tun_netdev_ops = { .ndo_open = tun_net_open, .ndo_stop = tun_net_close, .ndo_start_xmit = tun_net_xmit, - .ndo_change_mtu = tun_net_change_mtu, .ndo_fix_features = tun_net_fix_features, .ndo_select_queue = tun_select_queue, #ifdef CONFIG_NET_POLL_CONTROLLER @@ -1029,7 +1016,6 @@ static const struct net_device_ops tap_netdev_ops = { .ndo_open = tun_net_open, .ndo_stop = tun_net_close, .ndo_start_xmit = tun_net_xmit, - .ndo_change_mtu = tun_net_change_mtu, .ndo_fix_features = tun_net_fix_features, .ndo_set_rx_mode = tun_net_mclist, .ndo_set_mac_address = eth_mac_addr, @@ -1062,6 +1048,9 @@ static void tun_flow_uninit(struct tun_struct *tun) tun_flow_flush(tun); } +#define MIN_MTU 68 +#define MAX_MTU 65535 + /* Initialize net device. */ static void tun_net_init(struct net_device *dev) { @@ -1092,6 +1081,9 @@ static void tun_net_init(struct net_device *dev) break; } + + dev->min_mtu = MIN_MTU; + dev->max_mtu = MAX_MTU - dev->hard_header_len; } /* Character device part */ diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c index cce24950a0ab..7363cc5dd1bf 100644 --- a/drivers/net/usb/asix_devices.c +++ b/drivers/net/usb/asix_devices.c @@ -1026,9 +1026,6 @@ static int ax88178_change_mtu(struct net_device *net, int new_mtu) netdev_dbg(dev->net, "ax88178_change_mtu() new_mtu=%d\n", new_mtu); - if (new_mtu <= 0 || ll_mtu > 16384) - return -EINVAL; - if ((ll_mtu % dev->maxpacket) == 0) return -EDOM; @@ -1081,6 +1078,7 @@ static int ax88178_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->netdev_ops = &ax88178_netdev_ops; dev->net->ethtool_ops = &ax88178_ethtool_ops; + dev->net->max_mtu = 16384 - (dev->net->hard_header_len + 4); /* Blink LEDS so users know driver saw dongle */ asix_sw_reset(dev, 0, 0); diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c index e6338c16081a..36c70d6f7363 100644 --- a/drivers/net/usb/ax88179_178a.c +++ b/drivers/net/usb/ax88179_178a.c @@ -907,9 +907,6 @@ static int ax88179_change_mtu(struct net_device *net, int new_mtu) struct usbnet *dev = netdev_priv(net); u16 tmp16; - if (new_mtu <= 0 || new_mtu > 4088) - return -EINVAL; - net->mtu = new_mtu; dev->hard_mtu = net->mtu + net->hard_header_len; @@ -1266,6 +1263,7 @@ static int ax88179_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->netdev_ops = &ax88179_netdev_ops; dev->net->ethtool_ops = &ax88179_ethtool_ops; dev->net->needed_headroom = 8; + dev->net->max_mtu = 4088; /* Initialize MII structure */ dev->mii.dev = dev->net; diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c index ff2270ead2e6..eb52de8205f0 100644 --- a/drivers/net/usb/cdc-phonet.c +++ b/drivers/net/usb/cdc-phonet.c @@ -276,21 +276,11 @@ static int usbpn_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return -ENOIOCTLCMD; } -static int usbpn_set_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops usbpn_ops = { .ndo_open = usbpn_open, .ndo_stop = usbpn_close, .ndo_start_xmit = usbpn_xmit, .ndo_do_ioctl = usbpn_ioctl, - .ndo_change_mtu = usbpn_set_mtu, }; static void usbpn_setup(struct net_device *dev) @@ -301,6 +291,8 @@ static void usbpn_setup(struct net_device *dev) dev->type = ARPHRD_PHONET; dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->mtu = PHONET_MAX_MTU; + dev->min_mtu = PHONET_MIN_MTU; + dev->max_mtu = PHONET_MAX_MTU; dev->hard_header_len = 1; dev->dev_addr[0] = PN_MEDIA_USB; dev->addr_len = 1; diff --git a/drivers/net/usb/cdc_ncm.c b/drivers/net/usb/cdc_ncm.c index 877c9516e781..7141817946f0 100644 --- a/drivers/net/usb/cdc_ncm.c +++ b/drivers/net/usb/cdc_ncm.c @@ -740,10 +740,6 @@ static void cdc_ncm_free(struct cdc_ncm_ctx *ctx) int cdc_ncm_change_mtu(struct net_device *net, int new_mtu) { struct usbnet *dev = netdev_priv(net); - int maxmtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); - - if (new_mtu <= 0 || new_mtu > maxmtu) - return -EINVAL; net->mtu = new_mtu; cdc_ncm_set_dgram_size(dev, new_mtu + cdc_ncm_eth_hlen(dev)); @@ -909,6 +905,7 @@ int cdc_ncm_bind_common(struct usbnet *dev, struct usb_interface *intf, u8 data_ /* must handle MTU changes */ dev->net->netdev_ops = &cdc_ncm_netdev_ops; + dev->net->max_mtu = cdc_ncm_max_dgram_size(dev) - cdc_ncm_eth_hlen(dev); return 0; diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 13f033cebf2d..c4e748e92db4 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -1980,11 +1980,6 @@ static int lan78xx_change_mtu(struct net_device *netdev, int new_mtu) int old_rx_urb_size = dev->rx_urb_size; int ret; - if (new_mtu > MAX_SINGLE_PACKET_SIZE) - return -EINVAL; - - if (new_mtu <= 0) - return -EINVAL; /* no second zero-length packet read wanted after mtu-sized packets */ if ((ll_mtu % dev->maxpacket) == 0) return -EDOM; @@ -3388,6 +3383,9 @@ static int lan78xx_probe(struct usb_interface *intf, if (netdev->mtu > (dev->hard_mtu - netdev->hard_header_len)) netdev->mtu = dev->hard_mtu - netdev->hard_header_len; + /* MTU range: 68 - 9000 */ + netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; + dev->ep_blkin = (intf->cur_altsetting)->endpoint + 0; dev->ep_blkout = (intf->cur_altsetting)->endpoint + 1; dev->ep_intr = (intf->cur_altsetting)->endpoint + 2; diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 8d6e13c689e0..4213c28eeb43 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -4119,9 +4119,6 @@ static int rtl8152_change_mtu(struct net_device *dev, int new_mtu) break; } - if (new_mtu < 68 || new_mtu > RTL8153_MAX_MTU) - return -EINVAL; - ret = usb_autopm_get_interface(tp->intf); if (ret < 0) return ret; @@ -4311,6 +4308,18 @@ static int rtl8152_probe(struct usb_interface *intf, netdev->ethtool_ops = &ops; netif_set_gso_max_size(netdev, RTL_LIMITED_TSO_SIZE); + /* MTU range: 68 - 1500 or 9194 */ + netdev->min_mtu = ETH_MIN_MTU; + switch (tp->version) { + case RTL_VER_01: + case RTL_VER_02: + netdev->max_mtu = ETH_DATA_LEN; + break; + default: + netdev->max_mtu = RTL8153_MAX_MTU; + break; + } + tp->mii.dev = netdev; tp->mii.mdio_read = read_mii_word; tp->mii.mdio_write = write_mii_word; diff --git a/drivers/net/usb/sierra_net.c b/drivers/net/usb/sierra_net.c index a251588762ec..12071f1582df 100644 --- a/drivers/net/usb/sierra_net.c +++ b/drivers/net/usb/sierra_net.c @@ -165,7 +165,6 @@ struct lsi_umts { /* Forward definitions */ static void sierra_sync_timer(unsigned long syncdata); -static int sierra_net_change_mtu(struct net_device *net, int new_mtu); /* Our own net device operations structure */ static const struct net_device_ops sierra_net_device_ops = { @@ -173,7 +172,7 @@ static const struct net_device_ops sierra_net_device_ops = { .ndo_stop = usbnet_stop, .ndo_start_xmit = usbnet_start_xmit, .ndo_tx_timeout = usbnet_tx_timeout, - .ndo_change_mtu = sierra_net_change_mtu, + .ndo_change_mtu = usbnet_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; @@ -622,15 +621,6 @@ static const struct ethtool_ops sierra_net_ethtool_ops = { .nway_reset = usbnet_nway_reset, }; -/* MTU can not be more than 1500 bytes, enforce it. */ -static int sierra_net_change_mtu(struct net_device *net, int new_mtu) -{ - if (new_mtu > SIERRA_NET_MAX_SUPPORTED_MTU) - return -EINVAL; - - return usbnet_change_mtu(net, new_mtu); -} - static int sierra_net_get_fw_attr(struct usbnet *dev, u16 *datap) { int result = 0; @@ -720,6 +710,7 @@ static int sierra_net_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->hard_header_len += SIERRA_NET_HIP_EXT_HDR_LEN; dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + dev->net->max_mtu = SIERRA_NET_MAX_SUPPORTED_MTU; /* Set up the netdev */ dev->net->flags |= IFF_NOARP; diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index 9af9799935db..0b17b40d7a4f 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -925,9 +925,6 @@ static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu) struct usbnet *dev = netdev_priv(netdev); int ret; - if (new_mtu > MAX_SINGLE_PACKET_SIZE) - return -EINVAL; - ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN); if (ret < 0) { netdev_warn(dev->net, "Failed to set mac rx frame length\n"); @@ -1448,6 +1445,7 @@ static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf) dev->net->flags |= IFF_MULTICAST; dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD; dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len; + dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE; return 0; } diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index d5071e364d40..3de65ea6531a 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -384,8 +384,6 @@ int usbnet_change_mtu (struct net_device *net, int new_mtu) int old_hard_mtu = dev->hard_mtu; int old_rx_urb_size = dev->rx_urb_size; - if (new_mtu <= 0) - return -EINVAL; // no second zero-length packet read wanted after mtu-sized packets if ((ll_mtu % dev->maxpacket) == 0) return -EDOM; @@ -1669,6 +1667,8 @@ usbnet_probe (struct usb_interface *udev, const struct usb_device_id *prod) * bind() should set rx_urb_size in that case. */ dev->hard_mtu = net->mtu + net->hard_header_len; + net->min_mtu = 0; + net->max_mtu = ETH_MAX_MTU; net->netdev_ops = &usbnet_netdev_ops; net->watchdog_timeo = TX_TIMEOUT_JIFFIES; diff --git a/drivers/net/veth.c b/drivers/net/veth.c index fbc853e64531..0520952aa096 100644 --- a/drivers/net/veth.c +++ b/drivers/net/veth.c @@ -23,9 +23,6 @@ #define DRV_NAME "veth" #define DRV_VERSION "1.0" -#define MIN_MTU 68 /* Min L3 MTU */ -#define MAX_MTU 65535 /* Max L3 MTU (arbitrary) */ - struct pcpu_vstats { u64 packets; u64 bytes; @@ -216,17 +213,9 @@ static int veth_close(struct net_device *dev) return 0; } -static int is_valid_veth_mtu(int new_mtu) +static int is_valid_veth_mtu(int mtu) { - return new_mtu >= MIN_MTU && new_mtu <= MAX_MTU; -} - -static int veth_change_mtu(struct net_device *dev, int new_mtu) -{ - if (!is_valid_veth_mtu(new_mtu)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; + return mtu >= ETH_MIN_MTU && mtu <= ETH_MAX_MTU; } static int veth_dev_init(struct net_device *dev) @@ -300,7 +289,6 @@ static const struct net_device_ops veth_netdev_ops = { .ndo_open = veth_open, .ndo_stop = veth_close, .ndo_start_xmit = veth_xmit, - .ndo_change_mtu = veth_change_mtu, .ndo_get_stats64 = veth_get_stats64, .ndo_set_rx_mode = veth_set_multicast_list, .ndo_set_mac_address = eth_mac_addr, @@ -337,6 +325,7 @@ static void veth_setup(struct net_device *dev) NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_STAG_RX); dev->destructor = veth_dev_free; + dev->max_mtu = ETH_MAX_MTU; dev->hw_features = VETH_FEATURES; dev->hw_enc_features = VETH_FEATURES; diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index fad84f3f4109..720809f82a0e 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1419,17 +1419,6 @@ static const struct ethtool_ops virtnet_ethtool_ops = { .set_settings = virtnet_set_settings, }; -#define MIN_MTU 68 -#define MAX_MTU 65535 - -static int virtnet_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < MIN_MTU || new_mtu > MAX_MTU) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops virtnet_netdev = { .ndo_open = virtnet_open, .ndo_stop = virtnet_close, @@ -1437,7 +1426,6 @@ static const struct net_device_ops virtnet_netdev = { .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = virtnet_set_mac_address, .ndo_set_rx_mode = virtnet_set_rx_mode, - .ndo_change_mtu = virtnet_change_mtu, .ndo_get_stats64 = virtnet_stats, .ndo_vlan_rx_add_vid = virtnet_vlan_rx_add_vid, .ndo_vlan_rx_kill_vid = virtnet_vlan_rx_kill_vid, @@ -1748,6 +1736,9 @@ static bool virtnet_validate_features(struct virtio_device *vdev) return true; } +#define MIN_MTU ETH_MIN_MTU +#define MAX_MTU ETH_MAX_MTU + static int virtnet_probe(struct virtio_device *vdev) { int i, err; @@ -1821,6 +1812,10 @@ static int virtnet_probe(struct virtio_device *vdev) dev->vlan_features = dev->features; + /* MTU range: 68 - 65535 */ + dev->min_mtu = MIN_MTU; + dev->max_mtu = MAX_MTU; + /* Configuration may specify what MAC to use. Otherwise random. */ if (virtio_has_feature(vdev, VIRTIO_NET_F_MAC)) virtio_cread_bytes(vdev, @@ -1875,8 +1870,10 @@ static int virtnet_probe(struct virtio_device *vdev) mtu = virtio_cread16(vdev, offsetof(struct virtio_net_config, mtu)); - if (virtnet_change_mtu(dev, mtu)) + if (mtu < dev->min_mtu || mtu > dev->max_mtu) __virtio_clear_bit(vdev, VIRTIO_NET_F_MTU); + else + dev->mtu = mtu; } if (vi->any_header_sg) diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index b5554f2ebee4..0c36de121eb0 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -2969,9 +2969,6 @@ vmxnet3_change_mtu(struct net_device *netdev, int new_mtu) struct vmxnet3_adapter *adapter = netdev_priv(netdev); int err = 0; - if (new_mtu < VMXNET3_MIN_MTU || new_mtu > VMXNET3_MAX_MTU) - return -EINVAL; - netdev->mtu = new_mtu; /* @@ -3428,6 +3425,10 @@ vmxnet3_probe_device(struct pci_dev *pdev, vmxnet3_set_ethtool_ops(netdev); netdev->watchdog_timeo = 5 * HZ; + /* MTU range: 60 - 9000 */ + netdev->min_mtu = VMXNET3_MIN_MTU; + netdev->max_mtu = VMXNET3_MAX_MTU; + INIT_WORK(&adapter->work, vmxnet3_reset_work); set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state); diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index e7d16687538b..c0170b6956bb 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2367,43 +2367,31 @@ static void vxlan_set_multicast_list(struct net_device *dev) { } -static int __vxlan_change_mtu(struct net_device *dev, - struct net_device *lowerdev, - struct vxlan_rdst *dst, int new_mtu, bool strict) +static int vxlan_change_mtu(struct net_device *dev, int new_mtu) { - int max_mtu = IP_MAX_MTU; - - if (lowerdev) - max_mtu = lowerdev->mtu; + struct vxlan_dev *vxlan = netdev_priv(dev); + struct vxlan_rdst *dst = &vxlan->default_dst; + struct net_device *lowerdev = __dev_get_by_index(vxlan->net, + dst->remote_ifindex); + bool use_ipv6 = false; if (dst->remote_ip.sa.sa_family == AF_INET6) - max_mtu -= VXLAN6_HEADROOM; - else - max_mtu -= VXLAN_HEADROOM; - - if (new_mtu < 68) - return -EINVAL; + use_ipv6 = true; - if (new_mtu > max_mtu) { - if (strict) + /* This check is different than dev->max_mtu, because it looks at + * the lowerdev->mtu, rather than the static dev->max_mtu + */ + if (lowerdev) { + int max_mtu = lowerdev->mtu - + (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); + if (new_mtu > max_mtu) return -EINVAL; - - new_mtu = max_mtu; } dev->mtu = new_mtu; return 0; } -static int vxlan_change_mtu(struct net_device *dev, int new_mtu) -{ - struct vxlan_dev *vxlan = netdev_priv(dev); - struct vxlan_rdst *dst = &vxlan->default_dst; - struct net_device *lowerdev = __dev_get_by_index(vxlan->net, - dst->remote_ifindex); - return __vxlan_change_mtu(dev, lowerdev, dst, new_mtu, true); -} - static int vxlan_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) { struct vxlan_dev *vxlan = netdev_priv(dev); @@ -2795,6 +2783,10 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, vxlan_ether_setup(dev); } + /* MTU range: 68 - 65535 */ + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = ETH_MAX_MTU; + vxlan->net = src_net; dst->remote_vni = conf->vni; @@ -2838,7 +2830,8 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, #endif if (!conf->mtu) - dev->mtu = lowerdev->mtu - (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); + dev->mtu = lowerdev->mtu - + (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); needed_headroom = lowerdev->hard_header_len; } else if (vxlan_addr_multicast(&dst->remote_ip)) { @@ -2847,9 +2840,20 @@ static int vxlan_dev_configure(struct net *src_net, struct net_device *dev, } if (conf->mtu) { - err = __vxlan_change_mtu(dev, lowerdev, dst, conf->mtu, false); - if (err) - return err; + int max_mtu = ETH_MAX_MTU; + + if (lowerdev) + max_mtu = lowerdev->mtu; + + max_mtu -= (use_ipv6 ? VXLAN6_HEADROOM : VXLAN_HEADROOM); + + if (conf->mtu < dev->min_mtu || conf->mtu > dev->max_mtu) + return -EINVAL; + + dev->mtu = conf->mtu; + + if (conf->mtu > max_mtu) + dev->mtu = max_mtu; } if (use_ipv6 || conf->flags & VXLAN_F_COLLECT_METADATA) diff --git a/drivers/net/wan/c101.c b/drivers/net/wan/c101.c index 09a50751763b..2371e078afbb 100644 --- a/drivers/net/wan/c101.c +++ b/drivers/net/wan/c101.c @@ -302,7 +302,6 @@ static void c101_destroy_card(card_t *card) static const struct net_device_ops c101_ops = { .ndo_open = c101_open, .ndo_stop = c101_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = c101_ioctl, }; diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c index b87fe0a01c69..087eb266601f 100644 --- a/drivers/net/wan/cosa.c +++ b/drivers/net/wan/cosa.c @@ -432,7 +432,6 @@ module_exit(cosa_exit); static const struct net_device_ops cosa_ops = { .ndo_open = cosa_net_open, .ndo_stop = cosa_net_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = cosa_net_ioctl, .ndo_tx_timeout = cosa_net_timeout, diff --git a/drivers/net/wan/dscc4.c b/drivers/net/wan/dscc4.c index 629225980463..7351e5440ed7 100644 --- a/drivers/net/wan/dscc4.c +++ b/drivers/net/wan/dscc4.c @@ -887,7 +887,6 @@ static inline int dscc4_set_quartz(struct dscc4_dev_priv *dpriv, int hz) static const struct net_device_ops dscc4_ops = { .ndo_open = dscc4_open, .ndo_stop = dscc4_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = dscc4_ioctl, .ndo_tx_timeout = dscc4_tx_timeout, diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c index 3c9cbf908ec7..03696d35ee9c 100644 --- a/drivers/net/wan/farsync.c +++ b/drivers/net/wan/farsync.c @@ -2394,7 +2394,6 @@ fst_init_card(struct fst_card_info *card) static const struct net_device_ops fst_ops = { .ndo_open = fst_open, .ndo_stop = fst_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = fst_ioctl, .ndo_tx_timeout = fst_tx_timeout, diff --git a/drivers/net/wan/fsl_ucc_hdlc.c b/drivers/net/wan/fsl_ucc_hdlc.c index 65647533b401..e38ce4da3efb 100644 --- a/drivers/net/wan/fsl_ucc_hdlc.c +++ b/drivers/net/wan/fsl_ucc_hdlc.c @@ -992,7 +992,6 @@ static const struct dev_pm_ops uhdlc_pm_ops = { static const struct net_device_ops uhdlc_ops = { .ndo_open = uhdlc_open, .ndo_stop = uhdlc_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = uhdlc_ioctl, }; diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c index 9bd4aa8083ce..7221a53b8b14 100644 --- a/drivers/net/wan/hdlc.c +++ b/drivers/net/wan/hdlc.c @@ -46,14 +46,6 @@ static const char* version = "HDLC support module revision 1.22"; static struct hdlc_proto *first_proto; -int hdlc_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > HDLC_MAX_MTU)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static int hdlc_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *p, struct net_device *orig_dev) { @@ -237,6 +229,8 @@ static void hdlc_setup_dev(struct net_device *dev) dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->priv_flags = IFF_WAN_HDLC; dev->mtu = HDLC_MAX_MTU; + dev->min_mtu = 68; + dev->max_mtu = HDLC_MAX_MTU; dev->type = ARPHRD_RAWHDLC; dev->hard_header_len = 16; dev->addr_len = 0; @@ -353,7 +347,6 @@ MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>"); MODULE_DESCRIPTION("HDLC support module"); MODULE_LICENSE("GPL v2"); -EXPORT_SYMBOL(hdlc_change_mtu); EXPORT_SYMBOL(hdlc_start_xmit); EXPORT_SYMBOL(hdlc_open); EXPORT_SYMBOL(hdlc_close); diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c index b6e0cfb095d3..eb915281197e 100644 --- a/drivers/net/wan/hdlc_fr.c +++ b/drivers/net/wan/hdlc_fr.c @@ -1053,7 +1053,6 @@ static void pvc_setup(struct net_device *dev) static const struct net_device_ops pvc_ops = { .ndo_open = pvc_open, .ndo_stop = pvc_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = pvc_xmit, .ndo_do_ioctl = pvc_ioctl, }; @@ -1096,6 +1095,8 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type) } dev->netdev_ops = &pvc_ops; dev->mtu = HDLC_MAX_MTU; + dev->min_mtu = 68; + dev->max_mtu = HDLC_MAX_MTU; dev->priv_flags |= IFF_NO_QUEUE; dev->ml_priv = pvc; diff --git a/drivers/net/wan/hostess_sv11.c b/drivers/net/wan/hostess_sv11.c index 3d741663fd67..dd6bb3364ad2 100644 --- a/drivers/net/wan/hostess_sv11.c +++ b/drivers/net/wan/hostess_sv11.c @@ -180,7 +180,6 @@ static int hostess_attach(struct net_device *dev, unsigned short encoding, static const struct net_device_ops hostess_ops = { .ndo_open = hostess_open, .ndo_stop = hostess_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hostess_ioctl, }; diff --git a/drivers/net/wan/ixp4xx_hss.c b/drivers/net/wan/ixp4xx_hss.c index e7bbdb7af53a..6a505c26a3e7 100644 --- a/drivers/net/wan/ixp4xx_hss.c +++ b/drivers/net/wan/ixp4xx_hss.c @@ -1321,7 +1321,6 @@ static int hss_hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) static const struct net_device_ops hss_hdlc_ops = { .ndo_open = hss_hdlc_open, .ndo_stop = hss_hdlc_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hss_hdlc_ioctl, }; diff --git a/drivers/net/wan/lmc/lmc_main.c b/drivers/net/wan/lmc/lmc_main.c index 299140c04556..001b7796740d 100644 --- a/drivers/net/wan/lmc/lmc_main.c +++ b/drivers/net/wan/lmc/lmc_main.c @@ -808,7 +808,6 @@ static int lmc_attach(struct net_device *dev, unsigned short encoding, static const struct net_device_ops lmc_ops = { .ndo_open = lmc_open, .ndo_stop = lmc_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = lmc_ioctl, .ndo_tx_timeout = lmc_driver_timeout, diff --git a/drivers/net/wan/n2.c b/drivers/net/wan/n2.c index 315bf09d6a20..c8f4517db3a0 100644 --- a/drivers/net/wan/n2.c +++ b/drivers/net/wan/n2.c @@ -330,7 +330,6 @@ static void n2_destroy_card(card_t *card) static const struct net_device_ops n2_ops = { .ndo_open = n2_open, .ndo_stop = n2_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = n2_ioctl, }; diff --git a/drivers/net/wan/pc300too.c b/drivers/net/wan/pc300too.c index db363856e0b5..e1dd1ec18d64 100644 --- a/drivers/net/wan/pc300too.c +++ b/drivers/net/wan/pc300too.c @@ -291,7 +291,6 @@ static void pc300_pci_remove_one(struct pci_dev *pdev) static const struct net_device_ops pc300_ops = { .ndo_open = pc300_open, .ndo_stop = pc300_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = pc300_ioctl, }; diff --git a/drivers/net/wan/pci200syn.c b/drivers/net/wan/pci200syn.c index e8455621390e..4e437c599e9a 100644 --- a/drivers/net/wan/pci200syn.c +++ b/drivers/net/wan/pci200syn.c @@ -270,7 +270,6 @@ static void pci200_pci_remove_one(struct pci_dev *pdev) static const struct net_device_ops pci200_ops = { .ndo_open = pci200_open, .ndo_stop = pci200_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = pci200_ioctl, }; diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c index 27860b4f5908..fbb5aa2c4d8f 100644 --- a/drivers/net/wan/sealevel.c +++ b/drivers/net/wan/sealevel.c @@ -174,7 +174,6 @@ static int sealevel_attach(struct net_device *dev, unsigned short encoding, static const struct net_device_ops sealevel_ops = { .ndo_open = sealevel_open, .ndo_stop = sealevel_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = sealevel_ioctl, }; diff --git a/drivers/net/wan/wanxl.c b/drivers/net/wan/wanxl.c index a20d688d2595..0c7317520ed3 100644 --- a/drivers/net/wan/wanxl.c +++ b/drivers/net/wan/wanxl.c @@ -551,7 +551,6 @@ static void wanxl_pci_remove_one(struct pci_dev *pdev) static const struct net_device_ops wanxl_ops = { .ndo_open = wanxl_open, .ndo_stop = wanxl_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = wanxl_ioctl, .ndo_get_stats = wanxl_get_stats, diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c index 1bc5e93d2a34..878b05d06fc7 100644 --- a/drivers/net/wan/x25_asy.c +++ b/drivers/net/wan/x25_asy.c @@ -124,9 +124,6 @@ static int x25_asy_change_mtu(struct net_device *dev, int newmtu) unsigned char *xbuff, *rbuff; int len; - if (newmtu > 65534) - return -EINVAL; - len = 2 * newmtu; xbuff = kmalloc(len + 4, GFP_ATOMIC); rbuff = kmalloc(len + 4, GFP_ATOMIC); @@ -751,6 +748,8 @@ static void x25_asy_setup(struct net_device *dev) */ dev->mtu = SL_MTU; + dev->min_mtu = 0; + dev->max_mtu = 65534; dev->netdev_ops = &x25_asy_netdev_ops; dev->watchdog_timeo = HZ*20; dev->hard_header_len = 0; diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c index bb74f4b9a02f..7f64e74d746b 100644 --- a/drivers/net/wimax/i2400m/netdev.c +++ b/drivers/net/wimax/i2400m/netdev.c @@ -395,25 +395,6 @@ drop: static -int i2400m_change_mtu(struct net_device *net_dev, int new_mtu) -{ - int result; - struct i2400m *i2400m = net_dev_to_i2400m(net_dev); - struct device *dev = i2400m_dev(i2400m); - - if (new_mtu >= I2400M_MAX_MTU) { - dev_err(dev, "Cannot change MTU to %d (max is %d)\n", - new_mtu, I2400M_MAX_MTU); - result = -EINVAL; - } else { - net_dev->mtu = new_mtu; - result = 0; - } - return result; -} - - -static void i2400m_tx_timeout(struct net_device *net_dev) { /* @@ -590,7 +571,6 @@ static const struct net_device_ops i2400m_netdev_ops = { .ndo_stop = i2400m_stop, .ndo_start_xmit = i2400m_hard_start_xmit, .ndo_tx_timeout = i2400m_tx_timeout, - .ndo_change_mtu = i2400m_change_mtu, }; static void i2400m_get_drvinfo(struct net_device *net_dev, @@ -621,6 +601,8 @@ void i2400m_netdev_setup(struct net_device *net_dev) d_fnstart(3, NULL, "(net_dev %p)\n", net_dev); ether_setup(net_dev); net_dev->mtu = I2400M_MAX_MTU; + net_dev->min_mtu = 0; + net_dev->max_mtu = I2400M_MAX_MTU; net_dev->tx_queue_len = I2400M_TX_QLEN; net_dev->features = NETIF_F_VLAN_CHALLENGED diff --git a/drivers/net/wireless/ath/wil6210/netdev.c b/drivers/net/wireless/ath/wil6210/netdev.c index 61de5e9f8ef0..d18372cdc8ca 100644 --- a/drivers/net/wireless/ath/wil6210/netdev.c +++ b/drivers/net/wireless/ath/wil6210/netdev.c @@ -41,21 +41,6 @@ static int wil_stop(struct net_device *ndev) return wil_down(wil); } -static int wil_change_mtu(struct net_device *ndev, int new_mtu) -{ - struct wil6210_priv *wil = ndev_to_wil(ndev); - - if (new_mtu < 68 || new_mtu > mtu_max) { - wil_err(wil, "invalid MTU %d\n", new_mtu); - return -EINVAL; - } - - wil_dbg_misc(wil, "change MTU %d -> %d\n", ndev->mtu, new_mtu); - ndev->mtu = new_mtu; - - return 0; -} - static int wil_do_ioctl(struct net_device *ndev, struct ifreq *ifr, int cmd) { struct wil6210_priv *wil = ndev_to_wil(ndev); @@ -69,7 +54,6 @@ static const struct net_device_ops wil_netdev_ops = { .ndo_start_xmit = wil_start_xmit, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, - .ndo_change_mtu = wil_change_mtu, .ndo_do_ioctl = wil_do_ioctl, }; @@ -126,6 +110,7 @@ static int wil6210_netdev_poll_tx(struct napi_struct *napi, int budget) static void wil_dev_setup(struct net_device *dev) { ether_setup(dev); + dev->max_mtu = mtu_max; dev->tx_queue_len = WIL_TX_Q_LEN_DEFAULT; } diff --git a/drivers/net/wireless/atmel/atmel.c b/drivers/net/wireless/atmel/atmel.c index bf2e9a083c0c..eb92d5ab7a27 100644 --- a/drivers/net/wireless/atmel/atmel.c +++ b/drivers/net/wireless/atmel/atmel.c @@ -1295,14 +1295,6 @@ static struct iw_statistics *atmel_get_wireless_stats(struct net_device *dev) return &priv->wstats; } -static int atmel_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > 2312)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static int atmel_set_mac_address(struct net_device *dev, void *p) { struct sockaddr *addr = p; @@ -1506,7 +1498,6 @@ static const struct file_operations atmel_proc_fops = { static const struct net_device_ops atmel_netdev_ops = { .ndo_open = atmel_open, .ndo_stop = atmel_close, - .ndo_change_mtu = atmel_change_mtu, .ndo_set_mac_address = atmel_set_mac_address, .ndo_start_xmit = start_tx, .ndo_do_ioctl = atmel_ioctl, @@ -1600,6 +1591,10 @@ struct net_device *init_atmel_card(unsigned short irq, unsigned long port, dev->irq = irq; dev->base_addr = port; + /* MTU range: 68 - 2312 */ + dev->min_mtu = 68; + dev->max_mtu = MAX_WIRELESS_BODY - ETH_FCS_LEN; + SET_NETDEV_DEV(dev, sys_dev); if ((rc = request_irq(dev->irq, service_interrupt, IRQF_SHARED, dev->name, dev))) { diff --git a/drivers/net/wireless/cisco/airo.c b/drivers/net/wireless/cisco/airo.c index 69b826d229c5..4b040451a9b8 100644 --- a/drivers/net/wireless/cisco/airo.c +++ b/drivers/net/wireless/cisco/airo.c @@ -2329,14 +2329,6 @@ static int airo_set_mac_address(struct net_device *dev, void *p) return 0; } -static int airo_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > 2400)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static LIST_HEAD(airo_devices); static void add_airo_dev(struct airo_info *ai) @@ -2656,7 +2648,6 @@ static const struct net_device_ops airo11_netdev_ops = { .ndo_get_stats = airo_get_stats, .ndo_set_mac_address = airo_set_mac_address, .ndo_do_ioctl = airo_ioctl, - .ndo_change_mtu = airo_change_mtu, }; static void wifi_setup(struct net_device *dev) @@ -2668,6 +2659,8 @@ static void wifi_setup(struct net_device *dev) dev->type = ARPHRD_IEEE80211; dev->hard_header_len = ETH_HLEN; dev->mtu = AIRO_DEF_MTU; + dev->min_mtu = 68; + dev->max_mtu = MIC_MSGLEN_MAX; dev->addr_len = ETH_ALEN; dev->tx_queue_len = 100; @@ -2754,7 +2747,6 @@ static const struct net_device_ops airo_netdev_ops = { .ndo_set_rx_mode = airo_set_multicast_list, .ndo_set_mac_address = airo_set_mac_address, .ndo_do_ioctl = airo_ioctl, - .ndo_change_mtu = airo_change_mtu, .ndo_validate_addr = eth_validate_addr, }; @@ -2766,7 +2758,6 @@ static const struct net_device_ops mpi_netdev_ops = { .ndo_set_rx_mode = airo_set_multicast_list, .ndo_set_mac_address = airo_set_mac_address, .ndo_do_ioctl = airo_ioctl, - .ndo_change_mtu = airo_change_mtu, .ndo_validate_addr = eth_validate_addr, }; @@ -2822,6 +2813,7 @@ static struct net_device *_init_airo_card( unsigned short irq, int port, dev->irq = irq; dev->base_addr = port; dev->priv_flags &= ~IFF_TX_SKB_SHARING; + dev->max_mtu = MIC_MSGLEN_MAX; SET_NETDEV_DEV(dev, dmdev); diff --git a/drivers/net/wireless/intel/ipw2x00/ipw2100.c b/drivers/net/wireless/intel/ipw2x00/ipw2100.c index bfa542c8d6f1..64176090b196 100644 --- a/drivers/net/wireless/intel/ipw2x00/ipw2100.c +++ b/drivers/net/wireless/intel/ipw2x00/ipw2100.c @@ -6035,7 +6035,6 @@ static const struct net_device_ops ipw2100_netdev_ops = { .ndo_open = ipw2100_open, .ndo_stop = ipw2100_close, .ndo_start_xmit = libipw_xmit, - .ndo_change_mtu = libipw_change_mtu, .ndo_tx_timeout = ipw2100_tx_timeout, .ndo_set_mac_address = ipw2100_set_address, .ndo_validate_addr = eth_validate_addr, @@ -6071,6 +6070,8 @@ static struct net_device *ipw2100_alloc_device(struct pci_dev *pci_dev, dev->wireless_data = &priv->wireless_data; dev->watchdog_timeo = 3 * HZ; dev->irq = 0; + dev->min_mtu = 68; + dev->max_mtu = LIBIPW_DATA_LEN; /* NOTE: We don't use the wireless_handlers hook * in dev as the system will start throwing WX requests diff --git a/drivers/net/wireless/intel/ipw2x00/ipw2200.c b/drivers/net/wireless/intel/ipw2x00/ipw2200.c index bfd68612a535..ef9af8a29cad 100644 --- a/drivers/net/wireless/intel/ipw2x00/ipw2200.c +++ b/drivers/net/wireless/intel/ipw2x00/ipw2200.c @@ -11561,7 +11561,6 @@ static const struct net_device_ops ipw_prom_netdev_ops = { .ndo_open = ipw_prom_open, .ndo_stop = ipw_prom_stop, .ndo_start_xmit = ipw_prom_hard_start_xmit, - .ndo_change_mtu = libipw_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; @@ -11587,6 +11586,9 @@ static int ipw_prom_alloc(struct ipw_priv *priv) priv->prom_net_dev->type = ARPHRD_IEEE80211_RADIOTAP; priv->prom_net_dev->netdev_ops = &ipw_prom_netdev_ops; + priv->prom_net_dev->min_mtu = 68; + priv->prom_net_dev->max_mtu = LIBIPW_DATA_LEN; + priv->prom_priv->ieee->iw_mode = IW_MODE_MONITOR; SET_NETDEV_DEV(priv->prom_net_dev, &priv->pci_dev->dev); @@ -11619,7 +11621,6 @@ static const struct net_device_ops ipw_netdev_ops = { .ndo_set_rx_mode = ipw_net_set_multicast_list, .ndo_set_mac_address = ipw_net_set_mac_address, .ndo_start_xmit = libipw_xmit, - .ndo_change_mtu = libipw_change_mtu, .ndo_validate_addr = eth_validate_addr, }; @@ -11729,6 +11730,9 @@ static int ipw_pci_probe(struct pci_dev *pdev, net_dev->wireless_handlers = &ipw_wx_handler_def; net_dev->ethtool_ops = &ipw_ethtool_ops; + net_dev->min_mtu = 68; + net_dev->max_mtu = LIBIPW_DATA_LEN; + err = sysfs_create_group(&pdev->dev.kobj, &ipw_attribute_group); if (err) { IPW_ERROR("failed to create sysfs device attributes\n"); diff --git a/drivers/net/wireless/intel/ipw2x00/libipw.h b/drivers/net/wireless/intel/ipw2x00/libipw.h index b0571618c2ed..b51355134e04 100644 --- a/drivers/net/wireless/intel/ipw2x00/libipw.h +++ b/drivers/net/wireless/intel/ipw2x00/libipw.h @@ -948,7 +948,6 @@ static inline int libipw_is_cck_rate(u8 rate) /* libipw.c */ void free_libipw(struct net_device *dev, int monitor); struct net_device *alloc_libipw(int sizeof_priv, int monitor); -int libipw_change_mtu(struct net_device *dev, int new_mtu); void libipw_networks_age(struct libipw_device *ieee, unsigned long age_secs); diff --git a/drivers/net/wireless/intel/ipw2x00/libipw_module.c b/drivers/net/wireless/intel/ipw2x00/libipw_module.c index 60f28740f6af..2332075565f2 100644 --- a/drivers/net/wireless/intel/ipw2x00/libipw_module.c +++ b/drivers/net/wireless/intel/ipw2x00/libipw_module.c @@ -118,15 +118,6 @@ static void libipw_networks_initialize(struct libipw_device *ieee) &ieee->network_free_list); } -int libipw_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > LIBIPW_DATA_LEN)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} -EXPORT_SYMBOL(libipw_change_mtu); - struct net_device *alloc_libipw(int sizeof_priv, int monitor) { struct libipw_device *ieee; diff --git a/drivers/net/wireless/intersil/hostap/hostap_main.c b/drivers/net/wireless/intersil/hostap/hostap_main.c index 80d4228ba754..1a16b8cb366e 100644 --- a/drivers/net/wireless/intersil/hostap/hostap_main.c +++ b/drivers/net/wireless/intersil/hostap/hostap_main.c @@ -765,16 +765,6 @@ static void hostap_set_multicast_list(struct net_device *dev) } -static int prism2_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < PRISM2_MIN_MTU || new_mtu > PRISM2_MAX_MTU) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - - static void prism2_tx_timeout(struct net_device *dev) { struct hostap_interface *iface; @@ -813,7 +803,6 @@ static const struct net_device_ops hostap_netdev_ops = { .ndo_do_ioctl = hostap_ioctl, .ndo_set_mac_address = prism2_set_mac_address, .ndo_set_rx_mode = hostap_set_multicast_list, - .ndo_change_mtu = prism2_change_mtu, .ndo_tx_timeout = prism2_tx_timeout, .ndo_validate_addr = eth_validate_addr, }; @@ -826,7 +815,6 @@ static const struct net_device_ops hostap_mgmt_netdev_ops = { .ndo_do_ioctl = hostap_ioctl, .ndo_set_mac_address = prism2_set_mac_address, .ndo_set_rx_mode = hostap_set_multicast_list, - .ndo_change_mtu = prism2_change_mtu, .ndo_tx_timeout = prism2_tx_timeout, .ndo_validate_addr = eth_validate_addr, }; @@ -839,7 +827,6 @@ static const struct net_device_ops hostap_master_ops = { .ndo_do_ioctl = hostap_ioctl, .ndo_set_mac_address = prism2_set_mac_address, .ndo_set_rx_mode = hostap_set_multicast_list, - .ndo_change_mtu = prism2_change_mtu, .ndo_tx_timeout = prism2_tx_timeout, .ndo_validate_addr = eth_validate_addr, }; @@ -851,6 +838,8 @@ void hostap_setup_dev(struct net_device *dev, local_info_t *local, iface = netdev_priv(dev); ether_setup(dev); + dev->min_mtu = PRISM2_MIN_MTU; + dev->max_mtu = PRISM2_MAX_MTU; dev->priv_flags &= ~IFF_TX_SKB_SHARING; /* kernel callbacks */ diff --git a/drivers/net/wireless/intersil/orinoco/main.c b/drivers/net/wireless/intersil/orinoco/main.c index 7afe2004e930..9d96b7c928f7 100644 --- a/drivers/net/wireless/intersil/orinoco/main.c +++ b/drivers/net/wireless/intersil/orinoco/main.c @@ -322,9 +322,6 @@ int orinoco_change_mtu(struct net_device *dev, int new_mtu) { struct orinoco_private *priv = ndev_priv(dev); - if ((new_mtu < ORINOCO_MIN_MTU) || (new_mtu > ORINOCO_MAX_MTU)) - return -EINVAL; - /* MTU + encapsulation + header length */ if ((new_mtu + ENCAPS_OVERHEAD + sizeof(struct ieee80211_hdr)) > (priv->nicbuf_size - ETH_HLEN)) @@ -2288,6 +2285,9 @@ int orinoco_if_add(struct orinoco_private *priv, dev->base_addr = base_addr; dev->irq = irq; + dev->min_mtu = ORINOCO_MIN_MTU; + dev->max_mtu = ORINOCO_MAX_MTU; + SET_NETDEV_DEV(dev, priv->dev); ret = register_netdev(dev); if (ret) diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index 74dc2bf71428..e30ffd29b7e9 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -302,7 +302,7 @@ static int xenvif_close(struct net_device *dev) static int xenvif_change_mtu(struct net_device *dev, int mtu) { struct xenvif *vif = netdev_priv(dev); - int max = vif->can_sg ? 65535 - VLAN_ETH_HLEN : ETH_DATA_LEN; + int max = vif->can_sg ? ETH_MAX_MTU - VLAN_ETH_HLEN : ETH_DATA_LEN; if (mtu > max) return -EINVAL; @@ -471,6 +471,9 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid, dev->tx_queue_len = XENVIF_QUEUE_LENGTH; + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU - VLAN_ETH_HLEN; + /* * Initialise a dummy MAC address. We choose the numerically * largest non-broadcast address to prevent the address getting diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index e17879dd5d5a..7d616b003e89 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1329,6 +1329,8 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev) netdev->features |= netdev->hw_features; netdev->ethtool_ops = &xennet_ethtool_ops; + netdev->min_mtu = 0; + netdev->max_mtu = XEN_NETIF_MAX_TX_SIZE; SET_NETDEV_DEV(netdev, &dev->dev); np->netdev = netdev; diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c index ad17fc5883f6..ac65f12bcd43 100644 --- a/drivers/s390/net/ctcm_main.c +++ b/drivers/s390/net/ctcm_main.c @@ -1032,9 +1032,6 @@ static int ctcm_change_mtu(struct net_device *dev, int new_mtu) struct ctcm_priv *priv; int max_bufsize; - if (new_mtu < 576 || new_mtu > 65527) - return -EINVAL; - priv = dev->ml_priv; max_bufsize = priv->channel[CTCM_READ]->max_bufsize; @@ -1123,6 +1120,8 @@ void static ctcm_dev_setup(struct net_device *dev) dev->type = ARPHRD_SLIP; dev->tx_queue_len = 100; dev->flags = IFF_POINTOPOINT | IFF_NOARP; + dev->min_mtu = 576; + dev->max_mtu = 65527; } /* diff --git a/drivers/s390/net/netiucv.c b/drivers/s390/net/netiucv.c index 2f0f3918172a..2981024a2438 100644 --- a/drivers/s390/net/netiucv.c +++ b/drivers/s390/net/netiucv.c @@ -1428,27 +1428,6 @@ static struct net_device_stats *netiucv_stats (struct net_device * dev) return &priv->stats; } -/** - * netiucv_change_mtu - * @dev: Pointer to interface struct. - * @new_mtu: The new MTU to use for this interface. - * - * Sets MTU of an interface. - * - * Returns 0 on success, -EINVAL if MTU is out of valid range. - * (valid range is 576 .. NETIUCV_MTU_MAX). - */ -static int netiucv_change_mtu(struct net_device * dev, int new_mtu) -{ - IUCV_DBF_TEXT(trace, 3, __func__); - if (new_mtu < 576 || new_mtu > NETIUCV_MTU_MAX) { - IUCV_DBF_TEXT(setup, 2, "given MTU out of valid range\n"); - return -EINVAL; - } - dev->mtu = new_mtu; - return 0; -} - /* * attributes in sysfs */ @@ -1986,12 +1965,13 @@ static const struct net_device_ops netiucv_netdev_ops = { .ndo_stop = netiucv_close, .ndo_get_stats = netiucv_stats, .ndo_start_xmit = netiucv_tx, - .ndo_change_mtu = netiucv_change_mtu, }; static void netiucv_setup_netdevice(struct net_device *dev) { dev->mtu = NETIUCV_MTU_DEFAULT; + dev->min_mtu = 576; + dev->max_mtu = NETIUCV_MTU_MAX; dev->destructor = netiucv_free_netdevice; dev->hard_header_len = NETIUCV_HDRLEN; dev->addr_len = 0; diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 20cf29613043..e33558313834 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -4202,10 +4202,6 @@ int qeth_change_mtu(struct net_device *dev, int new_mtu) sprintf(dbf_text, "%8x", new_mtu); QETH_CARD_TEXT(card, 4, dbf_text); - if (new_mtu < 64) - return -EINVAL; - if (new_mtu > 65535) - return -EINVAL; if ((!qeth_is_supported(card, IPA_IP_FRAGMENTATION)) && (!qeth_mtu_is_valid(card, new_mtu))) return -EINVAL; diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index bb27058fa9f0..9c921c2833f1 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -1107,6 +1107,8 @@ static int qeth_l2_setup_netdev(struct qeth_card *card) card->dev->ml_priv = card; card->dev->watchdog_timeo = QETH_TX_TIMEOUT; card->dev->mtu = card->info.initial_mtu; + card->dev->min_mtu = 64; + card->dev->max_mtu = ETH_MAX_MTU; card->dev->netdev_ops = &qeth_l2_netdev_ops; card->dev->ethtool_ops = (card->info.type != QETH_CARD_TYPE_OSN) ? diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 272d9e7419be..ac37d050e765 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -3140,6 +3140,8 @@ static int qeth_l3_setup_netdev(struct qeth_card *card) card->dev->ml_priv = card; card->dev->watchdog_timeo = QETH_TX_TIMEOUT; card->dev->mtu = card->info.initial_mtu; + card->dev->min_mtu = 64; + card->dev->max_mtu = ETH_MAX_MTU; card->dev->ethtool_ops = &qeth_l3_ethtool_ops; card->dev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX | diff --git a/drivers/staging/unisys/include/iochannel.h b/drivers/staging/unisys/include/iochannel.h index cba4433bcd51..9081b3f8779c 100644 --- a/drivers/staging/unisys/include/iochannel.h +++ b/drivers/staging/unisys/include/iochannel.h @@ -113,12 +113,10 @@ enum net_types { }; -#define ETH_HEADER_SIZE 14 /* size of ethernet header */ - #define ETH_MIN_DATA_SIZE 46 /* minimum eth data size */ -#define ETH_MIN_PACKET_SIZE (ETH_HEADER_SIZE + ETH_MIN_DATA_SIZE) +#define ETH_MIN_PACKET_SIZE (ETH_HLEN + ETH_MIN_DATA_SIZE) -#define ETH_MAX_MTU 16384 /* maximum data size */ +#define VISOR_ETH_MAX_MTU 16384 /* maximum data size */ #ifndef MAX_MACADDR_LEN #define MAX_MACADDR_LEN 6 /* number of bytes in MAC address */ @@ -288,7 +286,7 @@ struct net_pkt_xmt { int len; /* full length of data in the packet */ int num_frags; /* number of fragments in frags containing data */ struct phys_info frags[MAX_PHYS_INFO]; /* physical page information */ - char ethhdr[ETH_HEADER_SIZE]; /* the ethernet header */ + char ethhdr[ETH_HLEN]; /* the ethernet header */ struct { /* these are needed for csum at uisnic end */ u8 valid; /* 1 = struct is valid - else ignore */ @@ -323,7 +321,7 @@ struct net_pkt_xmtdone { */ #define RCVPOST_BUF_SIZE 4032 #define MAX_NET_RCV_CHAIN \ - ((ETH_MAX_MTU + ETH_HEADER_SIZE + RCVPOST_BUF_SIZE - 1) \ + ((VISOR_ETH_MAX_MTU + ETH_HLEN + RCVPOST_BUF_SIZE - 1) \ / RCVPOST_BUF_SIZE) struct net_pkt_rcvpost { diff --git a/drivers/staging/unisys/visornic/visornic_main.c b/drivers/staging/unisys/visornic/visornic_main.c index 136700756485..f8a584bf4a77 100644 --- a/drivers/staging/unisys/visornic/visornic_main.c +++ b/drivers/staging/unisys/visornic/visornic_main.c @@ -791,7 +791,7 @@ visornic_xmit(struct sk_buff *skb, struct net_device *netdev) * pointing to */ firstfraglen = skb->len - skb->data_len; - if (firstfraglen < ETH_HEADER_SIZE) { + if (firstfraglen < ETH_HLEN) { spin_unlock_irqrestore(&devdata->priv_lock, flags); devdata->busy_cnt++; dev_err(&netdev->dev, @@ -864,7 +864,7 @@ visornic_xmit(struct sk_buff *skb, struct net_device *netdev) /* copy ethernet header from first frag into ocmdrsp * - everything else will be pass in frags & DMA'ed */ - memcpy(cmdrsp->net.xmt.ethhdr, skb->data, ETH_HEADER_SIZE); + memcpy(cmdrsp->net.xmt.ethhdr, skb->data, ETH_HLEN); /* copy frags info - from skb->data we need to only provide access * beyond eth header */ diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c index 825a63a7c0e3..4762d38a720e 100644 --- a/drivers/staging/wlan-ng/p80211netdev.c +++ b/drivers/staging/wlan-ng/p80211netdev.c @@ -669,18 +669,6 @@ static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr) return result; } -static int wlan_change_mtu(struct net_device *dev, int new_mtu) -{ - /* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap) - and another 8 for wep. */ - if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8))) - return -EINVAL; - - dev->mtu = new_mtu; - - return 0; -} - static const struct net_device_ops p80211_netdev_ops = { .ndo_init = p80211knetdev_init, .ndo_open = p80211knetdev_open, @@ -690,7 +678,6 @@ static const struct net_device_ops p80211_netdev_ops = { .ndo_do_ioctl = p80211knetdev_do_ioctl, .ndo_set_mac_address = p80211knetdev_set_mac_address, .ndo_tx_timeout = p80211knetdev_tx_timeout, - .ndo_change_mtu = wlan_change_mtu, .ndo_validate_addr = eth_validate_addr, }; @@ -756,6 +743,11 @@ int wlan_setup(struct wlandevice *wlandev, struct device *physdev) wdev->wiphy = wiphy; wdev->iftype = NL80211_IFTYPE_STATION; netdev->ieee80211_ptr = wdev; + netdev->min_mtu = 68; + /* 2312 is max 802.11 payload, 20 is overhead, + * (ether + llc + snap) and another 8 for wep. + */ + netdev->max_mtu = (2312 - 20 - 8); netif_stop_queue(netdev); netif_carrier_off(netdev); diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 54cab59e20ed..f3932baed07d 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2711,15 +2711,6 @@ static void gsm_mux_rx_netchar(struct gsm_dlci *dlci, return; } -static int gsm_change_mtu(struct net_device *net, int new_mtu) -{ - struct gsm_mux_net *mux_net = netdev_priv(net); - if ((new_mtu < 8) || (new_mtu > mux_net->dlci->gsm->mtu)) - return -EINVAL; - net->mtu = new_mtu; - return 0; -} - static void gsm_mux_net_init(struct net_device *net) { static const struct net_device_ops gsm_netdev_ops = { @@ -2728,7 +2719,6 @@ static void gsm_mux_net_init(struct net_device *net) .ndo_start_xmit = gsm_mux_net_start_xmit, .ndo_tx_timeout = gsm_mux_net_tx_timeout, .ndo_get_stats = gsm_mux_net_get_stats, - .ndo_change_mtu = gsm_change_mtu, }; net->netdev_ops = &gsm_netdev_ops; @@ -2787,6 +2777,8 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc) return -ENOMEM; } net->mtu = dlci->gsm->mtu; + net->min_mtu = 8; + net->max_mtu = dlci->gsm->mtu; mux_net = netdev_priv(net); mux_net->dlci = dlci; kref_init(&mux_net->ref); diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index c13e27ecb0b7..415885c56435 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -7973,7 +7973,6 @@ static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size) static const struct net_device_ops hdlcdev_ops = { .ndo_open = hdlcdev_open, .ndo_stop = hdlcdev_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hdlcdev_ioctl, .ndo_tx_timeout = hdlcdev_tx_timeout, diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 7aca2d4670e4..8267bcf2405e 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -1768,7 +1768,6 @@ static void hdlcdev_rx(struct slgt_info *info, char *buf, int size) static const struct net_device_ops hdlcdev_ops = { .ndo_open = hdlcdev_open, .ndo_stop = hdlcdev_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hdlcdev_ioctl, .ndo_tx_timeout = hdlcdev_tx_timeout, diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index dec156586de1..d66620f7eaa3 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -1887,7 +1887,6 @@ static void hdlcdev_rx(SLMP_INFO *info, char *buf, int size) static const struct net_device_ops hdlcdev_ops = { .ndo_open = hdlcdev_open, .ndo_stop = hdlcdev_close, - .ndo_change_mtu = hdlc_change_mtu, .ndo_start_xmit = hdlc_start_xmit, .ndo_do_ioctl = hdlcdev_ioctl, .ndo_tx_timeout = hdlcdev_tx_timeout, diff --git a/drivers/usb/gadget/function/f_phonet.c b/drivers/usb/gadget/function/f_phonet.c index 0473d619d5bf..b4058f0000e4 100644 --- a/drivers/usb/gadget/function/f_phonet.c +++ b/drivers/usb/gadget/function/f_phonet.c @@ -261,19 +261,10 @@ out: return NETDEV_TX_OK; } -static int pn_net_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops pn_netdev_ops = { .ndo_open = pn_net_open, .ndo_stop = pn_net_close, .ndo_start_xmit = pn_net_xmit, - .ndo_change_mtu = pn_net_mtu, }; static void pn_net_setup(struct net_device *dev) @@ -282,6 +273,8 @@ static void pn_net_setup(struct net_device *dev) dev->type = ARPHRD_PHONET; dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->mtu = PHONET_DEV_MTU; + dev->min_mtu = PHONET_MIN_MTU; + dev->max_mtu = PHONET_MAX_MTU; dev->hard_header_len = 1; dev->dev_addr[0] = PN_MEDIA_USB; dev->addr_len = 1; diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c index 9c8c9ed1dc9e..39a6df1e2ded 100644 --- a/drivers/usb/gadget/function/u_ether.c +++ b/drivers/usb/gadget/function/u_ether.c @@ -142,15 +142,6 @@ static inline int qlen(struct usb_gadget *gadget, unsigned qmult) /* NETWORK DRIVER HOOKUP (to the layer above this driver) */ -static int ueth_change_mtu(struct net_device *net, int new_mtu) -{ - if (new_mtu <= ETH_HLEN || new_mtu > GETHER_MAX_ETH_FRAME_LEN) - return -ERANGE; - net->mtu = new_mtu; - - return 0; -} - static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p) { struct eth_dev *dev = netdev_priv(net); @@ -736,7 +727,6 @@ static const struct net_device_ops eth_netdev_ops = { .ndo_open = eth_open, .ndo_stop = eth_stop, .ndo_start_xmit = eth_start_xmit, - .ndo_change_mtu = ueth_change_mtu, .ndo_set_mac_address = eth_mac_addr, .ndo_validate_addr = eth_validate_addr, }; @@ -799,6 +789,10 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g, net->ethtool_ops = &ops; + /* MTU range: 14 - 15412 */ + net->min_mtu = ETH_HLEN; + net->max_mtu = GETHER_MAX_ETH_FRAME_LEN; + dev->gadget = g; SET_NETDEV_DEV(net, &g->dev); SET_NETDEV_DEVTYPE(net, &gadget_type); diff --git a/include/linux/fddidevice.h b/include/linux/fddidevice.h index 9a79f0106da1..32c22cfb238b 100644 --- a/include/linux/fddidevice.h +++ b/include/linux/fddidevice.h @@ -26,7 +26,6 @@ #ifdef __KERNEL__ __be16 fddi_type_trans(struct sk_buff *skb, struct net_device *dev); -int fddi_change_mtu(struct net_device *dev, int new_mtu); struct net_device *alloc_fddidev(int sizeof_priv); #endif diff --git a/include/linux/hdlc.h b/include/linux/hdlc.h index e31bcd4c7859..97585d9679f3 100644 --- a/include/linux/hdlc.h +++ b/include/linux/hdlc.h @@ -93,8 +93,6 @@ static __inline__ void debug_frame(const struct sk_buff *skb) int hdlc_open(struct net_device *dev); /* Must be called by hardware driver when HDLC device is being closed */ void hdlc_close(struct net_device *dev); -/* May be used by hardware driver */ -int hdlc_change_mtu(struct net_device *dev, int new_mtu); /* Must be pointed to by hw driver's dev->netdev_ops->ndo_start_xmit */ netdev_tx_t hdlc_start_xmit(struct sk_buff *skb, struct net_device *dev); diff --git a/include/linux/hippidevice.h b/include/linux/hippidevice.h index 8ec23fb0b412..402f99e328d4 100644 --- a/include/linux/hippidevice.h +++ b/include/linux/hippidevice.h @@ -32,7 +32,6 @@ struct hippi_cb { }; __be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev); -int hippi_change_mtu(struct net_device *dev, int new_mtu); int hippi_mac_addr(struct net_device *dev, void *p); int hippi_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p); struct net_device *alloc_hippi_dev(int sizeof_priv); diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h index 864d6f2b2cb0..3e5185e9ef03 100644 --- a/include/uapi/linux/if_ether.h +++ b/include/uapi/linux/if_ether.h @@ -36,6 +36,7 @@ #define ETH_FCS_LEN 4 /* Octets in the FCS */ #define ETH_MIN_MTU 68 /* Min IPv4 MTU per RFC791 */ +#define ETH_MAX_MTU 0xFFFFU /* 65535, same as IP_MAX_MTU */ /* * These are the defined Ethernet Protocol ID's. diff --git a/net/802/fddi.c b/net/802/fddi.c index 7d3a0af954e8..6356623fc238 100644 --- a/net/802/fddi.c +++ b/net/802/fddi.c @@ -141,15 +141,6 @@ __be16 fddi_type_trans(struct sk_buff *skb, struct net_device *dev) EXPORT_SYMBOL(fddi_type_trans); -int fddi_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < FDDI_K_SNAP_HLEN) || (new_mtu > FDDI_K_SNAP_DLEN)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} -EXPORT_SYMBOL(fddi_change_mtu); - static const struct header_ops fddi_header_ops = { .create = fddi_header, }; @@ -161,6 +152,8 @@ static void fddi_setup(struct net_device *dev) dev->type = ARPHRD_FDDI; dev->hard_header_len = FDDI_K_SNAP_HLEN+3; /* Assume 802.2 SNAP hdr len + 3 pad bytes */ dev->mtu = FDDI_K_SNAP_DLEN; /* Assume max payload of 802.2 SNAP frame */ + dev->min_mtu = FDDI_K_SNAP_HLEN; + dev->max_mtu = FDDI_K_SNAP_DLEN; dev->addr_len = FDDI_K_ALEN; dev->tx_queue_len = 100; /* Long queues on FDDI */ dev->flags = IFF_BROADCAST | IFF_MULTICAST; diff --git a/net/802/hippi.c b/net/802/hippi.c index ade1a52cdcff..5e4427beab2b 100644 --- a/net/802/hippi.c +++ b/net/802/hippi.c @@ -116,18 +116,6 @@ __be16 hippi_type_trans(struct sk_buff *skb, struct net_device *dev) EXPORT_SYMBOL(hippi_type_trans); -int hippi_change_mtu(struct net_device *dev, int new_mtu) -{ - /* - * HIPPI's got these nice large MTUs. - */ - if ((new_mtu < 68) || (new_mtu > 65280)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} -EXPORT_SYMBOL(hippi_change_mtu); - /* * For HIPPI we will actually use the lower 4 bytes of the hardware * address as the I-FIELD rather than the actual hardware address. @@ -174,6 +162,8 @@ static void hippi_setup(struct net_device *dev) dev->type = ARPHRD_HIPPI; dev->hard_header_len = HIPPI_HLEN; dev->mtu = 65280; + dev->min_mtu = 68; + dev->max_mtu = 65280; dev->addr_len = HIPPI_ALEN; dev->tx_queue_len = 25 /* 5 */; memset(dev->broadcast, 0xFF, HIPPI_ALEN); diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index fbfacd51aa34..10da6c588bf8 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -826,5 +826,8 @@ void vlan_setup(struct net_device *dev) dev->destructor = vlan_dev_free; dev->ethtool_ops = &vlan_ethtool_ops; + dev->min_mtu = 0; + dev->max_mtu = ETH_MAX_MTU; + eth_zero_addr(dev->broadcast); } diff --git a/net/atm/lec.c b/net/atm/lec.c index 5d2693826afb..779b3fa6052d 100644 --- a/net/atm/lec.c +++ b/net/atm/lec.c @@ -544,15 +544,6 @@ send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, return 0; } -/* shamelessly stolen from drivers/net/net_init.c */ -static int lec_change_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 68) || (new_mtu > 18190)) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static void lec_set_multicast_list(struct net_device *dev) { /* @@ -565,7 +556,6 @@ static const struct net_device_ops lec_netdev_ops = { .ndo_open = lec_open, .ndo_stop = lec_close, .ndo_start_xmit = lec_start_xmit, - .ndo_change_mtu = lec_change_mtu, .ndo_tx_timeout = lec_tx_timeout, .ndo_set_rx_mode = lec_set_multicast_list, }; @@ -742,6 +732,7 @@ static int lecd_attach(struct atm_vcc *vcc, int arg) if (!dev_lec[i]) return -ENOMEM; dev_lec[i]->netdev_ops = &lec_netdev_ops; + dev_lec[i]->max_mtu = 18190; snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); if (register_netdev(dev_lec[i])) { free_netdev(dev_lec[i]); diff --git a/net/batman-adv/soft-interface.c b/net/batman-adv/soft-interface.c index 49e16b6e0ba3..112679d64be5 100644 --- a/net/batman-adv/soft-interface.c +++ b/net/batman-adv/soft-interface.c @@ -158,17 +158,6 @@ static int batadv_interface_set_mac_addr(struct net_device *dev, void *p) return 0; } -static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu) -{ - /* check ranges */ - if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev))) - return -EINVAL; - - dev->mtu = new_mtu; - - return 0; -} - /** * batadv_interface_set_rx_mode - set the rx mode of a device * @dev: registered network device to modify @@ -920,7 +909,6 @@ static const struct net_device_ops batadv_netdev_ops = { .ndo_vlan_rx_add_vid = batadv_interface_add_vid, .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid, .ndo_set_mac_address = batadv_interface_set_mac_addr, - .ndo_change_mtu = batadv_interface_change_mtu, .ndo_set_rx_mode = batadv_interface_set_rx_mode, .ndo_start_xmit = batadv_interface_tx, .ndo_validate_addr = eth_validate_addr, @@ -987,6 +975,7 @@ struct net_device *batadv_softif_create(struct net *net, const char *name) dev_net_set(soft_iface, net); soft_iface->rtnl_link_ops = &batadv_link_ops; + soft_iface->max_mtu = batadv_hardif_min_mtu(soft_iface); ret = register_netdevice(soft_iface); if (ret < 0) { diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 89a687f3c0a3..c08e02b67818 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -185,7 +185,7 @@ static struct rtnl_link_stats64 *br_get_stats64(struct net_device *dev, static int br_change_mtu(struct net_device *dev, int new_mtu) { struct net_bridge *br = netdev_priv(dev); - if (new_mtu < 68 || new_mtu > br_min_mtu(br)) + if (new_mtu > br_min_mtu(br)) return -EINVAL; dev->mtu = new_mtu; @@ -410,6 +410,7 @@ void br_dev_setup(struct net_device *dev) br->bridge_hello_time = br->hello_time = 2 * HZ; br->bridge_forward_delay = br->forward_delay = 15 * HZ; br->ageing_time = BR_DEFAULT_AGEING_TIME; + dev->max_mtu = ETH_MAX_MTU; br_netfilter_rtable_init(br); br_stp_timer_init(br); diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c index 16737cd8dae8..fc65b145f6e7 100644 --- a/net/hsr/hsr_device.c +++ b/net/hsr/hsr_device.c @@ -398,6 +398,7 @@ void hsr_dev_setup(struct net_device *dev) random_ether_addr(dev->dev_addr); ether_setup(dev); + dev->min_mtu = 0; dev->header_ops = &hsr_header_ops; dev->netdev_ops = &hsr_device_ops; SET_NETDEV_DEVTYPE(dev, &hsr_type); diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index 5719d6ba0824..12a92e3349ed 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -358,6 +358,7 @@ static struct ip_tunnel *ip_tunnel_create(struct net *net, { struct ip_tunnel *nt; struct net_device *dev; + int t_hlen; BUG_ON(!itn->fb_tunnel_dev); dev = __ip_tunnel_create(net, itn->fb_tunnel_dev->rtnl_link_ops, parms); @@ -367,6 +368,9 @@ static struct ip_tunnel *ip_tunnel_create(struct net *net, dev->mtu = ip_tunnel_bind_dev(dev); nt = netdev_priv(dev); + t_hlen = nt->hlen + sizeof(struct iphdr); + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = 0xFFF8 - dev->hard_header_len - t_hlen; ip_tunnel_add(itn, nt); return nt; } @@ -929,7 +933,7 @@ int __ip_tunnel_change_mtu(struct net_device *dev, int new_mtu, bool strict) int t_hlen = tunnel->hlen + sizeof(struct iphdr); int max_mtu = 0xFFF8 - dev->hard_header_len - t_hlen; - if (new_mtu < 68) + if (new_mtu < ETH_MIN_MTU) return -EINVAL; if (new_mtu > max_mtu) { diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 6a66adba0c22..3a70567846aa 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1634,7 +1634,7 @@ int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu) struct ip6_tnl *tnl = netdev_priv(dev); if (tnl->parms.proto == IPPROTO_IPIP) { - if (new_mtu < 68) + if (new_mtu < ETH_MIN_MTU) return -EINVAL; } else { if (new_mtu < IPV6_MIN_MTU) @@ -1787,6 +1787,8 @@ ip6_tnl_dev_init_gen(struct net_device *dev) dev->mtu = ETH_DATA_LEN - t_hlen; if (!(t->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT)) dev->mtu -= 8; + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = 0xFFF8 - dev->hard_header_len; return 0; diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c index 8a02ca8a11af..35c5b2d8c401 100644 --- a/net/ipv6/ip6_vti.c +++ b/net/ipv6/ip6_vti.c @@ -812,30 +812,11 @@ vti6_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) return err; } -/** - * vti6_tnl_change_mtu - change mtu manually for tunnel device - * @dev: virtual device associated with tunnel - * @new_mtu: the new mtu - * - * Return: - * 0 on success, - * %-EINVAL if mtu too small - **/ -static int vti6_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < IPV6_MIN_MTU) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops vti6_netdev_ops = { .ndo_init = vti6_dev_init, .ndo_uninit = vti6_dev_uninit, .ndo_start_xmit = vti6_tnl_xmit, .ndo_do_ioctl = vti6_ioctl, - .ndo_change_mtu = vti6_change_mtu, .ndo_get_stats64 = ip_tunnel_get_stats64, .ndo_get_iflink = ip6_tnl_get_iflink, }; @@ -855,6 +836,8 @@ static void vti6_dev_setup(struct net_device *dev) dev->type = ARPHRD_TUNNEL6; dev->hard_header_len = LL_MAX_HEADER + sizeof(struct ipv6hdr); dev->mtu = ETH_DATA_LEN; + dev->min_mtu = IPV6_MIN_MTU; + dev->max_mtu = IP_MAX_MTU; dev->flags |= IFF_NOARP; dev->addr_len = sizeof(struct in6_addr); netif_keep_dst(dev); diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index b1cdf8009d29..dc7a3449ffc1 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1318,23 +1318,11 @@ done: return err; } -static int ipip6_tunnel_change_mtu(struct net_device *dev, int new_mtu) -{ - struct ip_tunnel *tunnel = netdev_priv(dev); - int t_hlen = tunnel->hlen + sizeof(struct iphdr); - - if (new_mtu < IPV6_MIN_MTU || new_mtu > 0xFFF8 - t_hlen) - return -EINVAL; - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops ipip6_netdev_ops = { .ndo_init = ipip6_tunnel_init, .ndo_uninit = ipip6_tunnel_uninit, .ndo_start_xmit = sit_tunnel_xmit, .ndo_do_ioctl = ipip6_tunnel_ioctl, - .ndo_change_mtu = ipip6_tunnel_change_mtu, .ndo_get_stats64 = ip_tunnel_get_stats64, .ndo_get_iflink = ip_tunnel_get_iflink, }; @@ -1365,6 +1353,8 @@ static void ipip6_tunnel_setup(struct net_device *dev) dev->type = ARPHRD_SIT; dev->hard_header_len = LL_MAX_HEADER + t_hlen; dev->mtu = ETH_DATA_LEN - t_hlen; + dev->min_mtu = IPV6_MIN_MTU; + dev->max_mtu = 0xFFF8 - t_hlen; dev->flags = IFF_NOARP; netif_keep_dst(dev); dev->addr_len = 4; diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 638ec0759078..73e6a8fd2845 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -150,15 +150,6 @@ void ieee80211_recalc_idle(struct ieee80211_local *local) ieee80211_hw_config(local, change); } -static int ieee80211_change_mtu(struct net_device *dev, int new_mtu) -{ - if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr, bool check_dup) { @@ -1166,7 +1157,6 @@ static const struct net_device_ops ieee80211_dataif_ops = { .ndo_uninit = ieee80211_uninit, .ndo_start_xmit = ieee80211_subif_start_xmit, .ndo_set_rx_mode = ieee80211_set_multicast_list, - .ndo_change_mtu = ieee80211_change_mtu, .ndo_set_mac_address = ieee80211_change_mac, .ndo_select_queue = ieee80211_netdev_select_queue, .ndo_get_stats64 = ieee80211_get_stats64, @@ -1200,7 +1190,6 @@ static const struct net_device_ops ieee80211_monitorif_ops = { .ndo_uninit = ieee80211_uninit, .ndo_start_xmit = ieee80211_monitor_start_xmit, .ndo_set_rx_mode = ieee80211_set_multicast_list, - .ndo_change_mtu = ieee80211_change_mtu, .ndo_set_mac_address = ieee80211_change_mac, .ndo_select_queue = ieee80211_monitor_select_queue, .ndo_get_stats64 = ieee80211_get_stats64, @@ -1884,6 +1873,10 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name, netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops); + /* MTU range: 256 - 2304 */ + ndev->min_mtu = 256; + ndev->max_mtu = IEEE80211_MAX_DATA_LEN; + ret = register_netdevice(ndev); if (ret) { ieee80211_if_free(ndev); diff --git a/net/openvswitch/vport-internal_dev.c b/net/openvswitch/vport-internal_dev.c index e7da29021b38..d5d6caecd072 100644 --- a/net/openvswitch/vport-internal_dev.c +++ b/net/openvswitch/vport-internal_dev.c @@ -89,15 +89,6 @@ static const struct ethtool_ops internal_dev_ethtool_ops = { .get_link = ethtool_op_get_link, }; -static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu) -{ - if (new_mtu < 68) - return -EINVAL; - - netdev->mtu = new_mtu; - return 0; -} - static void internal_dev_destructor(struct net_device *dev) { struct vport *vport = ovs_internal_dev_get_vport(dev); @@ -148,7 +139,6 @@ static const struct net_device_ops internal_dev_netdev_ops = { .ndo_stop = internal_dev_stop, .ndo_start_xmit = internal_dev_xmit, .ndo_set_mac_address = eth_mac_addr, - .ndo_change_mtu = internal_dev_change_mtu, .ndo_get_stats64 = internal_get_stats, .ndo_set_rx_headroom = internal_set_rx_headroom, }; diff --git a/net/phonet/pep-gprs.c b/net/phonet/pep-gprs.c index fa8237fdc57b..21c28b51be94 100644 --- a/net/phonet/pep-gprs.c +++ b/net/phonet/pep-gprs.c @@ -217,20 +217,10 @@ static netdev_tx_t gprs_xmit(struct sk_buff *skb, struct net_device *dev) return NETDEV_TX_OK; } -static int gprs_set_mtu(struct net_device *dev, int new_mtu) -{ - if ((new_mtu < 576) || (new_mtu > (PHONET_MAX_MTU - 11))) - return -EINVAL; - - dev->mtu = new_mtu; - return 0; -} - static const struct net_device_ops gprs_netdev_ops = { .ndo_open = gprs_open, .ndo_stop = gprs_close, .ndo_start_xmit = gprs_xmit, - .ndo_change_mtu = gprs_set_mtu, }; static void gprs_setup(struct net_device *dev) @@ -239,6 +229,8 @@ static void gprs_setup(struct net_device *dev) dev->type = ARPHRD_PHONET_PIPE; dev->flags = IFF_POINTOPOINT | IFF_NOARP; dev->mtu = GPRS_DEFAULT_MTU; + dev->min_mtu = 576; + dev->max_mtu = (PHONET_MAX_MTU - 11); dev->hard_header_len = 0; dev->addr_len = 0; dev->tx_queue_len = 10; diff --git a/net/sched/sch_teql.c b/net/sched/sch_teql.c index 2cd9b4478b92..b0196366d58d 100644 --- a/net/sched/sch_teql.c +++ b/net/sched/sch_teql.c @@ -418,9 +418,6 @@ static int teql_master_mtu(struct net_device *dev, int new_mtu) struct teql_master *m = netdev_priv(dev); struct Qdisc *q; - if (new_mtu < 68) - return -EINVAL; - q = m->slaves; if (q) { do { @@ -460,6 +457,8 @@ static __init void teql_master_setup(struct net_device *dev) dev->netdev_ops = &teql_netdev_ops; dev->type = ARPHRD_VOID; dev->mtu = 1500; + dev->min_mtu = 68; + dev->max_mtu = 65535; dev->tx_queue_len = 100; dev->flags = IFF_NOARP; dev->hard_header_len = LL_MAX_HEADER; |