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![Michael S. Tsirkin](/assets/img/avatar_default.png)
This allows incrementing the correct timeout statistic without any mess. Down the road, devices can learn to reset just the specific queue. The patch was generated with the following script: use strict; use warnings; our $^I = '.bak'; my @work = ( ["arch/m68k/emu/nfeth.c", "nfeth_tx_timeout"], ["arch/um/drivers/net_kern.c", "uml_net_tx_timeout"], ["arch/um/drivers/vector_kern.c", "vector_net_tx_timeout"], ["arch/xtensa/platforms/iss/network.c", "iss_net_tx_timeout"], ["drivers/char/pcmcia/synclink_cs.c", "hdlcdev_tx_timeout"], ["drivers/infiniband/ulp/ipoib/ipoib_main.c", "ipoib_timeout"], ["drivers/infiniband/ulp/ipoib/ipoib_main.c", "ipoib_timeout"], ["drivers/message/fusion/mptlan.c", "mpt_lan_tx_timeout"], ["drivers/misc/sgi-xp/xpnet.c", "xpnet_dev_tx_timeout"], ["drivers/net/appletalk/cops.c", "cops_timeout"], ["drivers/net/arcnet/arcdevice.h", "arcnet_timeout"], ["drivers/net/arcnet/arcnet.c", "arcnet_timeout"], ["drivers/net/arcnet/com20020.c", "arcnet_timeout"], ["drivers/net/ethernet/3com/3c509.c", "el3_tx_timeout"], ["drivers/net/ethernet/3com/3c515.c", "corkscrew_timeout"], ["drivers/net/ethernet/3com/3c574_cs.c", "el3_tx_timeout"], ["drivers/net/ethernet/3com/3c589_cs.c", "el3_tx_timeout"], ["drivers/net/ethernet/3com/3c59x.c", "vortex_tx_timeout"], ["drivers/net/ethernet/3com/3c59x.c", "vortex_tx_timeout"], ["drivers/net/ethernet/3com/typhoon.c", "typhoon_tx_timeout"], ["drivers/net/ethernet/8390/8390.h", "ei_tx_timeout"], ["drivers/net/ethernet/8390/8390.h", "eip_tx_timeout"], ["drivers/net/ethernet/8390/8390.c", "ei_tx_timeout"], ["drivers/net/ethernet/8390/8390p.c", "eip_tx_timeout"], ["drivers/net/ethernet/8390/ax88796.c", "ax_ei_tx_timeout"], ["drivers/net/ethernet/8390/axnet_cs.c", "axnet_tx_timeout"], ["drivers/net/ethernet/8390/etherh.c", "__ei_tx_timeout"], ["drivers/net/ethernet/8390/hydra.c", "__ei_tx_timeout"], ["drivers/net/ethernet/8390/mac8390.c", "__ei_tx_timeout"], ["drivers/net/ethernet/8390/mcf8390.c", "__ei_tx_timeout"], ["drivers/net/ethernet/8390/lib8390.c", "__ei_tx_timeout"], ["drivers/net/ethernet/8390/ne2k-pci.c", "ei_tx_timeout"], ["drivers/net/ethernet/8390/pcnet_cs.c", "ei_tx_timeout"], ["drivers/net/ethernet/8390/smc-ultra.c", "ei_tx_timeout"], ["drivers/net/ethernet/8390/wd.c", "ei_tx_timeout"], ["drivers/net/ethernet/8390/zorro8390.c", "__ei_tx_timeout"], ["drivers/net/ethernet/adaptec/starfire.c", "tx_timeout"], ["drivers/net/ethernet/agere/et131x.c", "et131x_tx_timeout"], ["drivers/net/ethernet/allwinner/sun4i-emac.c", "emac_timeout"], ["drivers/net/ethernet/alteon/acenic.c", "ace_watchdog"], ["drivers/net/ethernet/amazon/ena/ena_netdev.c", "ena_tx_timeout"], ["drivers/net/ethernet/amd/7990.h", "lance_tx_timeout"], ["drivers/net/ethernet/amd/7990.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/a2065.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/am79c961a.c", "am79c961_timeout"], ["drivers/net/ethernet/amd/amd8111e.c", "amd8111e_tx_timeout"], ["drivers/net/ethernet/amd/ariadne.c", "ariadne_tx_timeout"], ["drivers/net/ethernet/amd/atarilance.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/au1000_eth.c", "au1000_tx_timeout"], ["drivers/net/ethernet/amd/declance.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/lance.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/mvme147.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/ni65.c", "ni65_timeout"], ["drivers/net/ethernet/amd/nmclan_cs.c", "mace_tx_timeout"], ["drivers/net/ethernet/amd/pcnet32.c", "pcnet32_tx_timeout"], ["drivers/net/ethernet/amd/sunlance.c", "lance_tx_timeout"], ["drivers/net/ethernet/amd/xgbe/xgbe-drv.c", "xgbe_tx_timeout"], ["drivers/net/ethernet/apm/xgene-v2/main.c", "xge_timeout"], ["drivers/net/ethernet/apm/xgene/xgene_enet_main.c", "xgene_enet_timeout"], ["drivers/net/ethernet/apple/macmace.c", "mace_tx_timeout"], ["drivers/net/ethernet/atheros/ag71xx.c", "ag71xx_tx_timeout"], ["drivers/net/ethernet/atheros/alx/main.c", "alx_tx_timeout"], ["drivers/net/ethernet/atheros/atl1c/atl1c_main.c", "atl1c_tx_timeout"], ["drivers/net/ethernet/atheros/atl1e/atl1e_main.c", "atl1e_tx_timeout"], ["drivers/net/ethernet/atheros/atlx/atl.c", "atlx_tx_timeout"], ["drivers/net/ethernet/atheros/atlx/atl1.c", "atlx_tx_timeout"], ["drivers/net/ethernet/atheros/atlx/atl2.c", "atl2_tx_timeout"], ["drivers/net/ethernet/broadcom/b44.c", "b44_tx_timeout"], ["drivers/net/ethernet/broadcom/bcmsysport.c", "bcm_sysport_tx_timeout"], ["drivers/net/ethernet/broadcom/bnx2.c", "bnx2_tx_timeout"], ["drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.h", "bnx2x_tx_timeout"], ["drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c", "bnx2x_tx_timeout"], ["drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c", "bnx2x_tx_timeout"], ["drivers/net/ethernet/broadcom/bnxt/bnxt.c", "bnxt_tx_timeout"], ["drivers/net/ethernet/broadcom/genet/bcmgenet.c", "bcmgenet_timeout"], ["drivers/net/ethernet/broadcom/sb1250-mac.c", "sbmac_tx_timeout"], ["drivers/net/ethernet/broadcom/tg3.c", "tg3_tx_timeout"], ["drivers/net/ethernet/calxeda/xgmac.c", "xgmac_tx_timeout"], ["drivers/net/ethernet/cavium/liquidio/lio_main.c", "liquidio_tx_timeout"], ["drivers/net/ethernet/cavium/liquidio/lio_vf_main.c", "liquidio_tx_timeout"], ["drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c", "lio_vf_rep_tx_timeout"], ["drivers/net/ethernet/cavium/thunder/nicvf_main.c", "nicvf_tx_timeout"], ["drivers/net/ethernet/cirrus/cs89x0.c", "net_timeout"], ["drivers/net/ethernet/cisco/enic/enic_main.c", "enic_tx_timeout"], ["drivers/net/ethernet/cisco/enic/enic_main.c", "enic_tx_timeout"], ["drivers/net/ethernet/cortina/gemini.c", "gmac_tx_timeout"], ["drivers/net/ethernet/davicom/dm9000.c", "dm9000_timeout"], ["drivers/net/ethernet/dec/tulip/de2104x.c", "de_tx_timeout"], ["drivers/net/ethernet/dec/tulip/tulip_core.c", "tulip_tx_timeout"], ["drivers/net/ethernet/dec/tulip/winbond-840.c", "tx_timeout"], ["drivers/net/ethernet/dlink/dl2k.c", "rio_tx_timeout"], ["drivers/net/ethernet/dlink/sundance.c", "tx_timeout"], ["drivers/net/ethernet/emulex/benet/be_main.c", "be_tx_timeout"], ["drivers/net/ethernet/ethoc.c", "ethoc_tx_timeout"], ["drivers/net/ethernet/faraday/ftgmac100.c", "ftgmac100_tx_timeout"], ["drivers/net/ethernet/fealnx.c", "fealnx_tx_timeout"], ["drivers/net/ethernet/freescale/dpaa/dpaa_eth.c", "dpaa_tx_timeout"], ["drivers/net/ethernet/freescale/fec_main.c", "fec_timeout"], ["drivers/net/ethernet/freescale/fec_mpc52xx.c", "mpc52xx_fec_tx_timeout"], ["drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c", "fs_timeout"], ["drivers/net/ethernet/freescale/gianfar.c", "gfar_timeout"], ["drivers/net/ethernet/freescale/ucc_geth.c", "ucc_geth_timeout"], ["drivers/net/ethernet/fujitsu/fmvj18x_cs.c", "fjn_tx_timeout"], ["drivers/net/ethernet/google/gve/gve_main.c", "gve_tx_timeout"], ["drivers/net/ethernet/hisilicon/hip04_eth.c", "hip04_timeout"], ["drivers/net/ethernet/hisilicon/hix5hd2_gmac.c", "hix5hd2_net_timeout"], ["drivers/net/ethernet/hisilicon/hns/hns_enet.c", "hns_nic_net_timeout"], ["drivers/net/ethernet/hisilicon/hns3/hns3_enet.c", "hns3_nic_net_timeout"], ["drivers/net/ethernet/huawei/hinic/hinic_main.c", "hinic_tx_timeout"], ["drivers/net/ethernet/i825xx/82596.c", "i596_tx_timeout"], ["drivers/net/ethernet/i825xx/ether1.c", "ether1_timeout"], ["drivers/net/ethernet/i825xx/lib82596.c", "i596_tx_timeout"], ["drivers/net/ethernet/i825xx/sun3_82586.c", "sun3_82586_timeout"], ["drivers/net/ethernet/ibm/ehea/ehea_main.c", "ehea_tx_watchdog"], ["drivers/net/ethernet/ibm/emac/core.c", "emac_tx_timeout"], ["drivers/net/ethernet/ibm/emac/core.c", "emac_tx_timeout"], ["drivers/net/ethernet/ibm/ibmvnic.c", "ibmvnic_tx_timeout"], ["drivers/net/ethernet/intel/e100.c", "e100_tx_timeout"], ["drivers/net/ethernet/intel/e1000/e1000_main.c", "e1000_tx_timeout"], ["drivers/net/ethernet/intel/e1000e/netdev.c", "e1000_tx_timeout"], ["drivers/net/ethernet/intel/fm10k/fm10k_netdev.c", "fm10k_tx_timeout"], ["drivers/net/ethernet/intel/i40e/i40e_main.c", "i40e_tx_timeout"], ["drivers/net/ethernet/intel/iavf/iavf_main.c", "iavf_tx_timeout"], ["drivers/net/ethernet/intel/ice/ice_main.c", "ice_tx_timeout"], ["drivers/net/ethernet/intel/ice/ice_main.c", "ice_tx_timeout"], ["drivers/net/ethernet/intel/igb/igb_main.c", "igb_tx_timeout"], ["drivers/net/ethernet/intel/igbvf/netdev.c", "igbvf_tx_timeout"], ["drivers/net/ethernet/intel/ixgb/ixgb_main.c", "ixgb_tx_timeout"], ["drivers/net/ethernet/intel/ixgbe/ixgbe_debugfs.c", "adapter->netdev->netdev_ops->ndo_tx_timeout(adapter->netdev);"], ["drivers/net/ethernet/intel/ixgbe/ixgbe_main.c", "ixgbe_tx_timeout"], ["drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c", "ixgbevf_tx_timeout"], ["drivers/net/ethernet/jme.c", "jme_tx_timeout"], ["drivers/net/ethernet/korina.c", "korina_tx_timeout"], ["drivers/net/ethernet/lantiq_etop.c", "ltq_etop_tx_timeout"], ["drivers/net/ethernet/marvell/mv643xx_eth.c", "mv643xx_eth_tx_timeout"], ["drivers/net/ethernet/marvell/pxa168_eth.c", "pxa168_eth_tx_timeout"], ["drivers/net/ethernet/marvell/skge.c", "skge_tx_timeout"], ["drivers/net/ethernet/marvell/sky2.c", "sky2_tx_timeout"], ["drivers/net/ethernet/marvell/sky2.c", "sky2_tx_timeout"], ["drivers/net/ethernet/mediatek/mtk_eth_soc.c", "mtk_tx_timeout"], ["drivers/net/ethernet/mellanox/mlx4/en_netdev.c", "mlx4_en_tx_timeout"], ["drivers/net/ethernet/mellanox/mlx4/en_netdev.c", "mlx4_en_tx_timeout"], ["drivers/net/ethernet/mellanox/mlx5/core/en_main.c", "mlx5e_tx_timeout"], ["drivers/net/ethernet/micrel/ks8842.c", "ks8842_tx_timeout"], ["drivers/net/ethernet/micrel/ksz884x.c", "netdev_tx_timeout"], ["drivers/net/ethernet/microchip/enc28j60.c", "enc28j60_tx_timeout"], ["drivers/net/ethernet/microchip/encx24j600.c", "encx24j600_tx_timeout"], ["drivers/net/ethernet/natsemi/sonic.h", "sonic_tx_timeout"], ["drivers/net/ethernet/natsemi/sonic.c", "sonic_tx_timeout"], ["drivers/net/ethernet/natsemi/jazzsonic.c", "sonic_tx_timeout"], ["drivers/net/ethernet/natsemi/macsonic.c", "sonic_tx_timeout"], ["drivers/net/ethernet/natsemi/natsemi.c", "ns_tx_timeout"], ["drivers/net/ethernet/natsemi/ns83820.c", "ns83820_tx_timeout"], ["drivers/net/ethernet/natsemi/xtsonic.c", "sonic_tx_timeout"], ["drivers/net/ethernet/neterion/s2io.h", "s2io_tx_watchdog"], ["drivers/net/ethernet/neterion/s2io.c", "s2io_tx_watchdog"], ["drivers/net/ethernet/neterion/vxge/vxge-main.c", "vxge_tx_watchdog"], ["drivers/net/ethernet/netronome/nfp/nfp_net_common.c", "nfp_net_tx_timeout"], ["drivers/net/ethernet/nvidia/forcedeth.c", "nv_tx_timeout"], ["drivers/net/ethernet/nvidia/forcedeth.c", "nv_tx_timeout"], ["drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_main.c", "pch_gbe_tx_timeout"], ["drivers/net/ethernet/packetengines/hamachi.c", "hamachi_tx_timeout"], ["drivers/net/ethernet/packetengines/yellowfin.c", "yellowfin_tx_timeout"], ["drivers/net/ethernet/pensando/ionic/ionic_lif.c", "ionic_tx_timeout"], ["drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c", "netxen_tx_timeout"], ["drivers/net/ethernet/qlogic/qla3xxx.c", "ql3xxx_tx_timeout"], ["drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c", "qlcnic_tx_timeout"], ["drivers/net/ethernet/qualcomm/emac/emac.c", "emac_tx_timeout"], ["drivers/net/ethernet/qualcomm/qca_spi.c", "qcaspi_netdev_tx_timeout"], ["drivers/net/ethernet/qualcomm/qca_uart.c", "qcauart_netdev_tx_timeout"], ["drivers/net/ethernet/rdc/r6040.c", "r6040_tx_timeout"], ["drivers/net/ethernet/realtek/8139cp.c", "cp_tx_timeout"], ["drivers/net/ethernet/realtek/8139too.c", "rtl8139_tx_timeout"], ["drivers/net/ethernet/realtek/atp.c", "tx_timeout"], ["drivers/net/ethernet/realtek/r8169_main.c", "rtl8169_tx_timeout"], ["drivers/net/ethernet/renesas/ravb_main.c", "ravb_tx_timeout"], ["drivers/net/ethernet/renesas/sh_eth.c", "sh_eth_tx_timeout"], ["drivers/net/ethernet/renesas/sh_eth.c", "sh_eth_tx_timeout"], ["drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c", "sxgbe_tx_timeout"], ["drivers/net/ethernet/seeq/ether3.c", "ether3_timeout"], ["drivers/net/ethernet/seeq/sgiseeq.c", "timeout"], ["drivers/net/ethernet/sfc/efx.c", "efx_watchdog"], ["drivers/net/ethernet/sfc/falcon/efx.c", "ef4_watchdog"], ["drivers/net/ethernet/sgi/ioc3-eth.c", "ioc3_timeout"], ["drivers/net/ethernet/sgi/meth.c", "meth_tx_timeout"], ["drivers/net/ethernet/silan/sc92031.c", "sc92031_tx_timeout"], ["drivers/net/ethernet/sis/sis190.c", "sis190_tx_timeout"], ["drivers/net/ethernet/sis/sis900.c", "sis900_tx_timeout"], ["drivers/net/ethernet/smsc/epic100.c", "epic_tx_timeout"], ["drivers/net/ethernet/smsc/smc911x.c", "smc911x_timeout"], ["drivers/net/ethernet/smsc/smc9194.c", "smc_timeout"], ["drivers/net/ethernet/smsc/smc91c92_cs.c", "smc_tx_timeout"], ["drivers/net/ethernet/smsc/smc91x.c", "smc_timeout"], ["drivers/net/ethernet/stmicro/stmmac/stmmac_main.c", "stmmac_tx_timeout"], ["drivers/net/ethernet/sun/cassini.c", "cas_tx_timeout"], ["drivers/net/ethernet/sun/ldmvsw.c", "sunvnet_tx_timeout_common"], ["drivers/net/ethernet/sun/niu.c", "niu_tx_timeout"], ["drivers/net/ethernet/sun/sunbmac.c", "bigmac_tx_timeout"], ["drivers/net/ethernet/sun/sungem.c", "gem_tx_timeout"], ["drivers/net/ethernet/sun/sunhme.c", "happy_meal_tx_timeout"], ["drivers/net/ethernet/sun/sunqe.c", "qe_tx_timeout"], ["drivers/net/ethernet/sun/sunvnet.c", "sunvnet_tx_timeout_common"], ["drivers/net/ethernet/sun/sunvnet_common.c", "sunvnet_tx_timeout_common"], ["drivers/net/ethernet/sun/sunvnet_common.h", "sunvnet_tx_timeout_common"], ["drivers/net/ethernet/synopsys/dwc-xlgmac-net.c", "xlgmac_tx_timeout"], ["drivers/net/ethernet/ti/cpmac.c", "cpmac_tx_timeout"], ["drivers/net/ethernet/ti/cpsw.c", "cpsw_ndo_tx_timeout"], ["drivers/net/ethernet/ti/cpsw_priv.c", "cpsw_ndo_tx_timeout"], ["drivers/net/ethernet/ti/cpsw_priv.h", "cpsw_ndo_tx_timeout"], ["drivers/net/ethernet/ti/davinci_emac.c", "emac_dev_tx_timeout"], ["drivers/net/ethernet/ti/netcp_core.c", "netcp_ndo_tx_timeout"], ["drivers/net/ethernet/ti/tlan.c", "tlan_tx_timeout"], ["drivers/net/ethernet/toshiba/ps3_gelic_net.h", "gelic_net_tx_timeout"], ["drivers/net/ethernet/toshiba/ps3_gelic_net.c", "gelic_net_tx_timeout"], ["drivers/net/ethernet/toshiba/ps3_gelic_wireless.c", "gelic_net_tx_timeout"], ["drivers/net/ethernet/toshiba/spider_net.c", "spider_net_tx_timeout"], ["drivers/net/ethernet/toshiba/tc35815.c", "tc35815_tx_timeout"], ["drivers/net/ethernet/via/via-rhine.c", "rhine_tx_timeout"], ["drivers/net/ethernet/wiznet/w5100.c", "w5100_tx_timeout"], ["drivers/net/ethernet/wiznet/w5300.c", "w5300_tx_timeout"], ["drivers/net/ethernet/xilinx/xilinx_emaclite.c", "xemaclite_tx_timeout"], ["drivers/net/ethernet/xircom/xirc2ps_cs.c", "xirc_tx_timeout"], ["drivers/net/fjes/fjes_main.c", "fjes_tx_retry"], ["drivers/net/slip/slip.c", "sl_tx_timeout"], ["include/linux/usb/usbnet.h", "usbnet_tx_timeout"], ["drivers/net/usb/aqc111.c", "usbnet_tx_timeout"], ["drivers/net/usb/asix_devices.c", "usbnet_tx_timeout"], ["drivers/net/usb/asix_devices.c", "usbnet_tx_timeout"], ["drivers/net/usb/asix_devices.c", "usbnet_tx_timeout"], ["drivers/net/usb/ax88172a.c", "usbnet_tx_timeout"], ["drivers/net/usb/ax88179_178a.c", "usbnet_tx_timeout"], ["drivers/net/usb/catc.c", "catc_tx_timeout"], ["drivers/net/usb/cdc_mbim.c", "usbnet_tx_timeout"], ["drivers/net/usb/cdc_ncm.c", "usbnet_tx_timeout"], ["drivers/net/usb/dm9601.c", "usbnet_tx_timeout"], ["drivers/net/usb/hso.c", "hso_net_tx_timeout"], ["drivers/net/usb/int51x1.c", "usbnet_tx_timeout"], ["drivers/net/usb/ipheth.c", "ipheth_tx_timeout"], ["drivers/net/usb/kaweth.c", "kaweth_tx_timeout"], ["drivers/net/usb/lan78xx.c", "lan78xx_tx_timeout"], ["drivers/net/usb/mcs7830.c", "usbnet_tx_timeout"], ["drivers/net/usb/pegasus.c", "pegasus_tx_timeout"], ["drivers/net/usb/qmi_wwan.c", "usbnet_tx_timeout"], ["drivers/net/usb/r8152.c", "rtl8152_tx_timeout"], ["drivers/net/usb/rndis_host.c", "usbnet_tx_timeout"], ["drivers/net/usb/rtl8150.c", "rtl8150_tx_timeout"], ["drivers/net/usb/sierra_net.c", "usbnet_tx_timeout"], ["drivers/net/usb/smsc75xx.c", "usbnet_tx_timeout"], ["drivers/net/usb/smsc95xx.c", "usbnet_tx_timeout"], ["drivers/net/usb/sr9700.c", "usbnet_tx_timeout"], ["drivers/net/usb/sr9800.c", "usbnet_tx_timeout"], ["drivers/net/usb/usbnet.c", "usbnet_tx_timeout"], ["drivers/net/vmxnet3/vmxnet3_drv.c", "vmxnet3_tx_timeout"], ["drivers/net/wan/cosa.c", "cosa_net_timeout"], ["drivers/net/wan/farsync.c", "fst_tx_timeout"], ["drivers/net/wan/fsl_ucc_hdlc.c", "uhdlc_tx_timeout"], ["drivers/net/wan/lmc/lmc_main.c", "lmc_driver_timeout"], ["drivers/net/wan/x25_asy.c", "x25_asy_timeout"], ["drivers/net/wimax/i2400m/netdev.c", "i2400m_tx_timeout"], ["drivers/net/wireless/intel/ipw2x00/ipw2100.c", "ipw2100_tx_timeout"], ["drivers/net/wireless/intersil/hostap/hostap_main.c", "prism2_tx_timeout"], ["drivers/net/wireless/intersil/hostap/hostap_main.c", "prism2_tx_timeout"], ["drivers/net/wireless/intersil/hostap/hostap_main.c", "prism2_tx_timeout"], ["drivers/net/wireless/intersil/orinoco/main.c", "orinoco_tx_timeout"], ["drivers/net/wireless/intersil/orinoco/orinoco_usb.c", "orinoco_tx_timeout"], ["drivers/net/wireless/intersil/orinoco/orinoco.h", "orinoco_tx_timeout"], ["drivers/net/wireless/intersil/prism54/islpci_dev.c", "islpci_eth_tx_timeout"], ["drivers/net/wireless/intersil/prism54/islpci_eth.c", "islpci_eth_tx_timeout"], ["drivers/net/wireless/intersil/prism54/islpci_eth.h", "islpci_eth_tx_timeout"], ["drivers/net/wireless/marvell/mwifiex/main.c", "mwifiex_tx_timeout"], ["drivers/net/wireless/quantenna/qtnfmac/core.c", "qtnf_netdev_tx_timeout"], ["drivers/net/wireless/quantenna/qtnfmac/core.h", "qtnf_netdev_tx_timeout"], ["drivers/net/wireless/rndis_wlan.c", "usbnet_tx_timeout"], ["drivers/net/wireless/wl3501_cs.c", "wl3501_tx_timeout"], ["drivers/net/wireless/zydas/zd1201.c", "zd1201_tx_timeout"], ["drivers/s390/net/qeth_core.h", "qeth_tx_timeout"], ["drivers/s390/net/qeth_core_main.c", "qeth_tx_timeout"], ["drivers/s390/net/qeth_l2_main.c", "qeth_tx_timeout"], ["drivers/s390/net/qeth_l2_main.c", "qeth_tx_timeout"], ["drivers/s390/net/qeth_l3_main.c", "qeth_tx_timeout"], ["drivers/s390/net/qeth_l3_main.c", "qeth_tx_timeout"], ["drivers/staging/ks7010/ks_wlan_net.c", "ks_wlan_tx_timeout"], ["drivers/staging/qlge/qlge_main.c", "qlge_tx_timeout"], ["drivers/staging/rtl8192e/rtl8192e/rtl_core.c", "_rtl92e_tx_timeout"], ["drivers/staging/rtl8192u/r8192U_core.c", "tx_timeout"], ["drivers/staging/unisys/visornic/visornic_main.c", "visornic_xmit_timeout"], ["drivers/staging/wlan-ng/p80211netdev.c", "p80211knetdev_tx_timeout"], ["drivers/tty/n_gsm.c", "gsm_mux_net_tx_timeout"], ["drivers/tty/synclink.c", "hdlcdev_tx_timeout"], ["drivers/tty/synclink_gt.c", "hdlcdev_tx_timeout"], ["drivers/tty/synclinkmp.c", "hdlcdev_tx_timeout"], ["net/atm/lec.c", "lec_tx_timeout"], ["net/bluetooth/bnep/netdev.c", "bnep_net_timeout"] ); for my $p (@work) { my @pair = @$p; my $file = $pair[0]; my $func = $pair[1]; print STDERR $file , ": ", $func,"\n"; our @ARGV = ($file); while (<ARGV>) { if (m/($func\s*\(struct\s+net_device\s+\*[A-Za-z_]?[A-Za-z-0-9_]*)(\))/) { print STDERR "found $1+$2 in $file\n"; } if (s/($func\s*\(struct\s+net_device\s+\*[A-Za-z_]?[A-Za-z-0-9_]*)(\))/$1, unsigned int txqueue$2/) { print STDERR "$func found in $file\n"; } print; } } where the list of files and functions is simply from: git grep ndo_tx_timeout, with manual addition of headers in the rare cases where the function is from a header, then manually changing the few places which actually call ndo_tx_timeout. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Heiner Kallweit <hkallweit1@gmail.com> Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Shannon Nelson <snelson@pensando.io> Reviewed-by: Martin Habets <mhabets@solarflare.com> changes from v9: fixup a forward declaration changes from v9: more leftovers from v3 change changes from v8: fix up a missing direct call to timeout rebased on net-next changes from v7: fixup leftovers from v3 change changes from v6: fix typo in rtl driver changes from v5: add missing files (allow any net device argument name) changes from v4: add a missing driver header changes from v3: change queue # to unsigned Changes from v2: added headers Changes from v1: Fix errors found by kbuild: generalize the pattern a bit, to pick up a couple of instances missed by the previous version. Signed-off-by: David S. Miller <davem@davemloft.net>
809 lines
18 KiB
C
809 lines
18 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Things to sort out:
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*
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* o tbusy handling
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* o allow users to set the parameters
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* o sync/async switching ?
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*
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* Note: This does _not_ implement CCITT X.25 asynchronous framing
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* recommendations. Its primarily for testing purposes. If you wanted
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* to do CCITT then in theory all you need is to nick the HDLC async
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* checksum routines from ppp.c
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* Changes:
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*
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* 2000-10-29 Henner Eisen lapb_data_indication() return status.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/module.h>
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#include <linux/uaccess.h>
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#include <linux/bitops.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/in.h>
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#include <linux/tty.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.h>
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#include <linux/lapb.h>
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#include <linux/init.h>
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#include <linux/rtnetlink.h>
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#include <linux/slab.h>
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#include <net/x25device.h>
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#include "x25_asy.h"
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static struct net_device **x25_asy_devs;
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static int x25_asy_maxdev = SL_NRUNIT;
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module_param(x25_asy_maxdev, int, 0);
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MODULE_LICENSE("GPL");
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static int x25_asy_esc(unsigned char *p, unsigned char *d, int len);
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static void x25_asy_unesc(struct x25_asy *sl, unsigned char c);
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static void x25_asy_setup(struct net_device *dev);
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/* Find a free X.25 channel, and link in this `tty' line. */
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static struct x25_asy *x25_asy_alloc(void)
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{
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struct net_device *dev = NULL;
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struct x25_asy *sl;
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int i;
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if (x25_asy_devs == NULL)
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return NULL; /* Master array missing ! */
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for (i = 0; i < x25_asy_maxdev; i++) {
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dev = x25_asy_devs[i];
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/* Not allocated ? */
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if (dev == NULL)
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break;
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sl = netdev_priv(dev);
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/* Not in use ? */
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if (!test_and_set_bit(SLF_INUSE, &sl->flags))
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return sl;
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}
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/* Sorry, too many, all slots in use */
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if (i >= x25_asy_maxdev)
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return NULL;
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/* If no channels are available, allocate one */
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if (!dev) {
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char name[IFNAMSIZ];
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sprintf(name, "x25asy%d", i);
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dev = alloc_netdev(sizeof(struct x25_asy), name,
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NET_NAME_UNKNOWN, x25_asy_setup);
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if (!dev)
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return NULL;
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/* Initialize channel control data */
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sl = netdev_priv(dev);
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dev->base_addr = i;
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/* register device so that it can be ifconfig'ed */
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if (register_netdev(dev) == 0) {
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/* (Re-)Set the INUSE bit. Very Important! */
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set_bit(SLF_INUSE, &sl->flags);
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x25_asy_devs[i] = dev;
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return sl;
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} else {
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pr_warn("%s(): register_netdev() failure\n", __func__);
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free_netdev(dev);
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}
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}
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return NULL;
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}
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/* Free an X.25 channel. */
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static void x25_asy_free(struct x25_asy *sl)
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{
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/* Free all X.25 frame buffers. */
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kfree(sl->rbuff);
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sl->rbuff = NULL;
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kfree(sl->xbuff);
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sl->xbuff = NULL;
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if (!test_and_clear_bit(SLF_INUSE, &sl->flags))
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netdev_err(sl->dev, "x25_asy_free for already free unit\n");
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}
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static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
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{
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struct x25_asy *sl = netdev_priv(dev);
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unsigned char *xbuff, *rbuff;
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int len;
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len = 2 * newmtu;
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xbuff = kmalloc(len + 4, GFP_ATOMIC);
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rbuff = kmalloc(len + 4, GFP_ATOMIC);
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if (xbuff == NULL || rbuff == NULL) {
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kfree(xbuff);
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kfree(rbuff);
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return -ENOMEM;
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}
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spin_lock_bh(&sl->lock);
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xbuff = xchg(&sl->xbuff, xbuff);
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if (sl->xleft) {
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if (sl->xleft <= len) {
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memcpy(sl->xbuff, sl->xhead, sl->xleft);
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} else {
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sl->xleft = 0;
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dev->stats.tx_dropped++;
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}
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}
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sl->xhead = sl->xbuff;
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rbuff = xchg(&sl->rbuff, rbuff);
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if (sl->rcount) {
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if (sl->rcount <= len) {
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memcpy(sl->rbuff, rbuff, sl->rcount);
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} else {
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sl->rcount = 0;
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dev->stats.rx_over_errors++;
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set_bit(SLF_ERROR, &sl->flags);
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}
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}
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dev->mtu = newmtu;
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sl->buffsize = len;
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spin_unlock_bh(&sl->lock);
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kfree(xbuff);
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kfree(rbuff);
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return 0;
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}
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/* Set the "sending" flag. This must be atomic, hence the ASM. */
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static inline void x25_asy_lock(struct x25_asy *sl)
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{
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netif_stop_queue(sl->dev);
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}
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/* Clear the "sending" flag. This must be atomic, hence the ASM. */
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static inline void x25_asy_unlock(struct x25_asy *sl)
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{
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netif_wake_queue(sl->dev);
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}
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/* Send one completely decapsulated IP datagram to the IP layer. */
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static void x25_asy_bump(struct x25_asy *sl)
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{
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struct net_device *dev = sl->dev;
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struct sk_buff *skb;
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int count;
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int err;
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count = sl->rcount;
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dev->stats.rx_bytes += count;
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skb = dev_alloc_skb(count+1);
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if (skb == NULL) {
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netdev_warn(sl->dev, "memory squeeze, dropping packet\n");
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dev->stats.rx_dropped++;
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return;
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}
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skb_push(skb, 1); /* LAPB internal control */
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skb_put_data(skb, sl->rbuff, count);
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skb->protocol = x25_type_trans(skb, sl->dev);
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err = lapb_data_received(skb->dev, skb);
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if (err != LAPB_OK) {
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kfree_skb(skb);
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printk(KERN_DEBUG "x25_asy: data received err - %d\n", err);
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} else {
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netif_rx(skb);
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dev->stats.rx_packets++;
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}
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}
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/* Encapsulate one IP datagram and stuff into a TTY queue. */
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static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
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{
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unsigned char *p;
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int actual, count, mtu = sl->dev->mtu;
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if (len > mtu) {
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/* Sigh, shouldn't occur BUT ... */
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len = mtu;
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printk(KERN_DEBUG "%s: truncating oversized transmit packet!\n",
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sl->dev->name);
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sl->dev->stats.tx_dropped++;
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x25_asy_unlock(sl);
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return;
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}
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p = icp;
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count = x25_asy_esc(p, sl->xbuff, len);
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/* Order of next two lines is *very* important.
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* When we are sending a little amount of data,
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* the transfer may be completed inside driver.write()
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* routine, because it's running with interrupts enabled.
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* In this case we *never* got WRITE_WAKEUP event,
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* if we did not request it before write operation.
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* 14 Oct 1994 Dmitry Gorodchanin.
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*/
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set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
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actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
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sl->xleft = count - actual;
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sl->xhead = sl->xbuff + actual;
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/* VSV */
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clear_bit(SLF_OUTWAIT, &sl->flags); /* reset outfill flag */
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}
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/*
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* Called by the driver when there's room for more data. If we have
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* more packets to send, we send them here.
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*/
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static void x25_asy_write_wakeup(struct tty_struct *tty)
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{
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int actual;
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struct x25_asy *sl = tty->disc_data;
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/* First make sure we're connected. */
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if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
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return;
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if (sl->xleft <= 0) {
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/* Now serial buffer is almost free & we can start
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* transmission of another packet */
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sl->dev->stats.tx_packets++;
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clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
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x25_asy_unlock(sl);
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return;
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}
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actual = tty->ops->write(tty, sl->xhead, sl->xleft);
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sl->xleft -= actual;
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sl->xhead += actual;
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}
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static void x25_asy_timeout(struct net_device *dev, unsigned int txqueue)
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{
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struct x25_asy *sl = netdev_priv(dev);
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spin_lock(&sl->lock);
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if (netif_queue_stopped(dev)) {
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/* May be we must check transmitter timeout here ?
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* 14 Oct 1994 Dmitry Gorodchanin.
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*/
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netdev_warn(dev, "transmit timed out, %s?\n",
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(tty_chars_in_buffer(sl->tty) || sl->xleft) ?
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"bad line quality" : "driver error");
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sl->xleft = 0;
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clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
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x25_asy_unlock(sl);
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}
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spin_unlock(&sl->lock);
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}
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/* Encapsulate an IP datagram and kick it into a TTY queue. */
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static netdev_tx_t x25_asy_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct x25_asy *sl = netdev_priv(dev);
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int err;
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if (!netif_running(sl->dev)) {
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netdev_err(dev, "xmit call when iface is down\n");
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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switch (skb->data[0]) {
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case X25_IFACE_DATA:
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break;
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case X25_IFACE_CONNECT: /* Connection request .. do nothing */
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err = lapb_connect_request(dev);
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if (err != LAPB_OK)
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netdev_err(dev, "lapb_connect_request error: %d\n",
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err);
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kfree_skb(skb);
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return NETDEV_TX_OK;
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case X25_IFACE_DISCONNECT: /* do nothing - hang up ?? */
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err = lapb_disconnect_request(dev);
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if (err != LAPB_OK)
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netdev_err(dev, "lapb_disconnect_request error: %d\n",
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err);
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/* fall through */
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default:
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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skb_pull(skb, 1); /* Remove control byte */
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/*
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* If we are busy already- too bad. We ought to be able
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* to queue things at this point, to allow for a little
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* frame buffer. Oh well...
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* -----------------------------------------------------
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* I hate queues in X.25 driver. May be it's efficient,
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* but for me latency is more important. ;)
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* So, no queues !
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* 14 Oct 1994 Dmitry Gorodchanin.
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*/
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err = lapb_data_request(dev, skb);
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if (err != LAPB_OK) {
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netdev_err(dev, "lapb_data_request error: %d\n", err);
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kfree_skb(skb);
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return NETDEV_TX_OK;
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}
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return NETDEV_TX_OK;
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}
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/*
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* LAPB interface boilerplate
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*/
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/*
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* Called when I frame data arrives. We did the work above - throw it
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* at the net layer.
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*/
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static int x25_asy_data_indication(struct net_device *dev, struct sk_buff *skb)
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{
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return netif_rx(skb);
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}
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/*
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* Data has emerged from the LAPB protocol machine. We don't handle
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* busy cases too well. Its tricky to see how to do this nicely -
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* perhaps lapb should allow us to bounce this ?
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*/
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static void x25_asy_data_transmit(struct net_device *dev, struct sk_buff *skb)
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{
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struct x25_asy *sl = netdev_priv(dev);
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spin_lock(&sl->lock);
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if (netif_queue_stopped(sl->dev) || sl->tty == NULL) {
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spin_unlock(&sl->lock);
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netdev_err(dev, "tbusy drop\n");
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kfree_skb(skb);
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return;
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}
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/* We were not busy, so we are now... :-) */
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if (skb != NULL) {
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x25_asy_lock(sl);
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dev->stats.tx_bytes += skb->len;
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x25_asy_encaps(sl, skb->data, skb->len);
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dev_kfree_skb(skb);
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}
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spin_unlock(&sl->lock);
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}
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/*
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* LAPB connection establish/down information.
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*/
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static void x25_asy_connected(struct net_device *dev, int reason)
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{
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struct x25_asy *sl = netdev_priv(dev);
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struct sk_buff *skb;
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unsigned char *ptr;
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skb = dev_alloc_skb(1);
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if (skb == NULL) {
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netdev_err(dev, "out of memory\n");
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return;
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}
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ptr = skb_put(skb, 1);
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*ptr = X25_IFACE_CONNECT;
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|
skb->protocol = x25_type_trans(skb, sl->dev);
|
|
netif_rx(skb);
|
|
}
|
|
|
|
static void x25_asy_disconnected(struct net_device *dev, int reason)
|
|
{
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
struct sk_buff *skb;
|
|
unsigned char *ptr;
|
|
|
|
skb = dev_alloc_skb(1);
|
|
if (skb == NULL) {
|
|
netdev_err(dev, "out of memory\n");
|
|
return;
|
|
}
|
|
|
|
ptr = skb_put(skb, 1);
|
|
*ptr = X25_IFACE_DISCONNECT;
|
|
|
|
skb->protocol = x25_type_trans(skb, sl->dev);
|
|
netif_rx(skb);
|
|
}
|
|
|
|
static const struct lapb_register_struct x25_asy_callbacks = {
|
|
.connect_confirmation = x25_asy_connected,
|
|
.connect_indication = x25_asy_connected,
|
|
.disconnect_confirmation = x25_asy_disconnected,
|
|
.disconnect_indication = x25_asy_disconnected,
|
|
.data_indication = x25_asy_data_indication,
|
|
.data_transmit = x25_asy_data_transmit,
|
|
};
|
|
|
|
|
|
/* Open the low-level part of the X.25 channel. Easy! */
|
|
static int x25_asy_open(struct net_device *dev)
|
|
{
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
unsigned long len;
|
|
int err;
|
|
|
|
if (sl->tty == NULL)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* Allocate the X.25 frame buffers:
|
|
*
|
|
* rbuff Receive buffer.
|
|
* xbuff Transmit buffer.
|
|
*/
|
|
|
|
len = dev->mtu * 2;
|
|
|
|
sl->rbuff = kmalloc(len + 4, GFP_KERNEL);
|
|
if (sl->rbuff == NULL)
|
|
goto norbuff;
|
|
sl->xbuff = kmalloc(len + 4, GFP_KERNEL);
|
|
if (sl->xbuff == NULL)
|
|
goto noxbuff;
|
|
|
|
sl->buffsize = len;
|
|
sl->rcount = 0;
|
|
sl->xleft = 0;
|
|
sl->flags &= (1 << SLF_INUSE); /* Clear ESCAPE & ERROR flags */
|
|
|
|
netif_start_queue(dev);
|
|
|
|
/*
|
|
* Now attach LAPB
|
|
*/
|
|
err = lapb_register(dev, &x25_asy_callbacks);
|
|
if (err == LAPB_OK)
|
|
return 0;
|
|
|
|
/* Cleanup */
|
|
kfree(sl->xbuff);
|
|
sl->xbuff = NULL;
|
|
noxbuff:
|
|
kfree(sl->rbuff);
|
|
sl->rbuff = NULL;
|
|
norbuff:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
/* Close the low-level part of the X.25 channel. Easy! */
|
|
static int x25_asy_close(struct net_device *dev)
|
|
{
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
|
|
spin_lock(&sl->lock);
|
|
if (sl->tty)
|
|
clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
|
|
|
|
netif_stop_queue(dev);
|
|
sl->rcount = 0;
|
|
sl->xleft = 0;
|
|
spin_unlock(&sl->lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handle the 'receiver data ready' interrupt.
|
|
* This function is called by the 'tty_io' module in the kernel when
|
|
* a block of X.25 data has been received, which can now be decapsulated
|
|
* and sent on to some IP layer for further processing.
|
|
*/
|
|
|
|
static void x25_asy_receive_buf(struct tty_struct *tty,
|
|
const unsigned char *cp, char *fp, int count)
|
|
{
|
|
struct x25_asy *sl = tty->disc_data;
|
|
|
|
if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
|
|
return;
|
|
|
|
|
|
/* Read the characters out of the buffer */
|
|
while (count--) {
|
|
if (fp && *fp++) {
|
|
if (!test_and_set_bit(SLF_ERROR, &sl->flags))
|
|
sl->dev->stats.rx_errors++;
|
|
cp++;
|
|
continue;
|
|
}
|
|
x25_asy_unesc(sl, *cp++);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Open the high-level part of the X.25 channel.
|
|
* This function is called by the TTY module when the
|
|
* X.25 line discipline is called for. Because we are
|
|
* sure the tty line exists, we only have to link it to
|
|
* a free X.25 channel...
|
|
*/
|
|
|
|
static int x25_asy_open_tty(struct tty_struct *tty)
|
|
{
|
|
struct x25_asy *sl;
|
|
int err;
|
|
|
|
if (tty->ops->write == NULL)
|
|
return -EOPNOTSUPP;
|
|
|
|
/* OK. Find a free X.25 channel to use. */
|
|
sl = x25_asy_alloc();
|
|
if (sl == NULL)
|
|
return -ENFILE;
|
|
|
|
sl->tty = tty;
|
|
tty->disc_data = sl;
|
|
tty->receive_room = 65536;
|
|
tty_driver_flush_buffer(tty);
|
|
tty_ldisc_flush(tty);
|
|
|
|
/* Restore default settings */
|
|
sl->dev->type = ARPHRD_X25;
|
|
|
|
/* Perform the low-level X.25 async init */
|
|
err = x25_asy_open(sl->dev);
|
|
if (err) {
|
|
x25_asy_free(sl);
|
|
return err;
|
|
}
|
|
/* Done. We have linked the TTY line to a channel. */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Close down an X.25 channel.
|
|
* This means flushing out any pending queues, and then restoring the
|
|
* TTY line discipline to what it was before it got hooked to X.25
|
|
* (which usually is TTY again).
|
|
*/
|
|
static void x25_asy_close_tty(struct tty_struct *tty)
|
|
{
|
|
struct x25_asy *sl = tty->disc_data;
|
|
int err;
|
|
|
|
/* First make sure we're connected. */
|
|
if (!sl || sl->magic != X25_ASY_MAGIC)
|
|
return;
|
|
|
|
rtnl_lock();
|
|
if (sl->dev->flags & IFF_UP)
|
|
dev_close(sl->dev);
|
|
rtnl_unlock();
|
|
|
|
err = lapb_unregister(sl->dev);
|
|
if (err != LAPB_OK)
|
|
pr_err("%s: lapb_unregister error: %d\n",
|
|
__func__, err);
|
|
|
|
tty->disc_data = NULL;
|
|
sl->tty = NULL;
|
|
x25_asy_free(sl);
|
|
}
|
|
|
|
/************************************************************************
|
|
* STANDARD X.25 ENCAPSULATION *
|
|
************************************************************************/
|
|
|
|
static int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
|
|
{
|
|
unsigned char *ptr = d;
|
|
unsigned char c;
|
|
|
|
/*
|
|
* Send an initial END character to flush out any
|
|
* data that may have accumulated in the receiver
|
|
* due to line noise.
|
|
*/
|
|
|
|
*ptr++ = X25_END; /* Send 10111110 bit seq */
|
|
|
|
/*
|
|
* For each byte in the packet, send the appropriate
|
|
* character sequence, according to the X.25 protocol.
|
|
*/
|
|
|
|
while (len-- > 0) {
|
|
switch (c = *s++) {
|
|
case X25_END:
|
|
*ptr++ = X25_ESC;
|
|
*ptr++ = X25_ESCAPE(X25_END);
|
|
break;
|
|
case X25_ESC:
|
|
*ptr++ = X25_ESC;
|
|
*ptr++ = X25_ESCAPE(X25_ESC);
|
|
break;
|
|
default:
|
|
*ptr++ = c;
|
|
break;
|
|
}
|
|
}
|
|
*ptr++ = X25_END;
|
|
return ptr - d;
|
|
}
|
|
|
|
static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
|
|
{
|
|
|
|
switch (s) {
|
|
case X25_END:
|
|
if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
|
|
sl->rcount > 2)
|
|
x25_asy_bump(sl);
|
|
clear_bit(SLF_ESCAPE, &sl->flags);
|
|
sl->rcount = 0;
|
|
return;
|
|
case X25_ESC:
|
|
set_bit(SLF_ESCAPE, &sl->flags);
|
|
return;
|
|
case X25_ESCAPE(X25_ESC):
|
|
case X25_ESCAPE(X25_END):
|
|
if (test_and_clear_bit(SLF_ESCAPE, &sl->flags))
|
|
s = X25_UNESCAPE(s);
|
|
break;
|
|
}
|
|
if (!test_bit(SLF_ERROR, &sl->flags)) {
|
|
if (sl->rcount < sl->buffsize) {
|
|
sl->rbuff[sl->rcount++] = s;
|
|
return;
|
|
}
|
|
sl->dev->stats.rx_over_errors++;
|
|
set_bit(SLF_ERROR, &sl->flags);
|
|
}
|
|
}
|
|
|
|
|
|
/* Perform I/O control on an active X.25 channel. */
|
|
static int x25_asy_ioctl(struct tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct x25_asy *sl = tty->disc_data;
|
|
|
|
/* First make sure we're connected. */
|
|
if (!sl || sl->magic != X25_ASY_MAGIC)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case SIOCGIFNAME:
|
|
if (copy_to_user((void __user *)arg, sl->dev->name,
|
|
strlen(sl->dev->name) + 1))
|
|
return -EFAULT;
|
|
return 0;
|
|
case SIOCSIFHWADDR:
|
|
return -EINVAL;
|
|
default:
|
|
return tty_mode_ioctl(tty, file, cmd, arg);
|
|
}
|
|
}
|
|
|
|
static int x25_asy_open_dev(struct net_device *dev)
|
|
{
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
if (sl->tty == NULL)
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static const struct net_device_ops x25_asy_netdev_ops = {
|
|
.ndo_open = x25_asy_open_dev,
|
|
.ndo_stop = x25_asy_close,
|
|
.ndo_start_xmit = x25_asy_xmit,
|
|
.ndo_tx_timeout = x25_asy_timeout,
|
|
.ndo_change_mtu = x25_asy_change_mtu,
|
|
};
|
|
|
|
/* Initialise the X.25 driver. Called by the device init code */
|
|
static void x25_asy_setup(struct net_device *dev)
|
|
{
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
|
|
sl->magic = X25_ASY_MAGIC;
|
|
sl->dev = dev;
|
|
spin_lock_init(&sl->lock);
|
|
set_bit(SLF_INUSE, &sl->flags);
|
|
|
|
/*
|
|
* Finish setting up the DEVICE info.
|
|
*/
|
|
|
|
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;
|
|
dev->addr_len = 0;
|
|
dev->type = ARPHRD_X25;
|
|
dev->tx_queue_len = 10;
|
|
|
|
/* New-style flags. */
|
|
dev->flags = IFF_NOARP;
|
|
}
|
|
|
|
static struct tty_ldisc_ops x25_ldisc = {
|
|
.owner = THIS_MODULE,
|
|
.magic = TTY_LDISC_MAGIC,
|
|
.name = "X.25",
|
|
.open = x25_asy_open_tty,
|
|
.close = x25_asy_close_tty,
|
|
.ioctl = x25_asy_ioctl,
|
|
.receive_buf = x25_asy_receive_buf,
|
|
.write_wakeup = x25_asy_write_wakeup,
|
|
};
|
|
|
|
static int __init init_x25_asy(void)
|
|
{
|
|
if (x25_asy_maxdev < 4)
|
|
x25_asy_maxdev = 4; /* Sanity */
|
|
|
|
pr_info("X.25 async: version 0.00 ALPHA (dynamic channels, max=%d)\n",
|
|
x25_asy_maxdev);
|
|
|
|
x25_asy_devs = kcalloc(x25_asy_maxdev, sizeof(struct net_device *),
|
|
GFP_KERNEL);
|
|
if (!x25_asy_devs)
|
|
return -ENOMEM;
|
|
|
|
return tty_register_ldisc(N_X25, &x25_ldisc);
|
|
}
|
|
|
|
|
|
static void __exit exit_x25_asy(void)
|
|
{
|
|
struct net_device *dev;
|
|
int i;
|
|
|
|
for (i = 0; i < x25_asy_maxdev; i++) {
|
|
dev = x25_asy_devs[i];
|
|
if (dev) {
|
|
struct x25_asy *sl = netdev_priv(dev);
|
|
|
|
spin_lock_bh(&sl->lock);
|
|
if (sl->tty)
|
|
tty_hangup(sl->tty);
|
|
|
|
spin_unlock_bh(&sl->lock);
|
|
/*
|
|
* VSV = if dev->start==0, then device
|
|
* unregistered while close proc.
|
|
*/
|
|
unregister_netdev(dev);
|
|
free_netdev(dev);
|
|
}
|
|
}
|
|
|
|
kfree(x25_asy_devs);
|
|
tty_unregister_ldisc(N_X25);
|
|
}
|
|
|
|
module_init(init_x25_asy);
|
|
module_exit(exit_x25_asy);
|