为什么ifconfig中不包含can设备？

877509395@qq.co

eth1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 6a:09:56:05:ce:76  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth2: flags=-28669<UP,BROADCAST,MULTICAST,DYNAMIC>  mtu 1500
        ether c2:f6:99:89:94:98  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 2460  bytes 157650 (153.9 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2460  bytes 157650 (153.9 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

sit0: flags=128<NOARP>  mtu 1480
        sit  txqueuelen 1000  (IPv6-in-IPv4)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

config文件中有:
CONFIG_CAN_FLEXCAN=y

877509395@qq.co

这里也说明can驱动存在了
debian@npi:/proc$ grep -i flexcan kallsyms
00000000 t flexcan_read_be
00000000 t flexcan_write_be
00000000 t flexcan_mb_read_be
00000000 t flexcan_mb_write_be
00000000 t flexcan_read_le
00000000 t flexcan_write_le
00000000 t flexcan_mb_read_le
00000000 t flexcan_mb_write_le
00000000 t flexcan_chip_enable
00000000 t flexcan_chip_disable
00000000 t flexcan_noirq_suspend
00000000 t flexcan_runtime_resume
00000000 t flexcan_runtime_suspend
00000000 t flexcan_noirq_resume
00000000 t flexcan_chip_stop
00000000 t flexcan_chip_start
00000000 t flexcan_resume
00000000 t flexcan_suspend
00000000 t flexcan_remove
00000000 t flexcan_set_mode
00000000 t flexcan_start_xmit
00000000 t flexcan_mailbox_read
00000000 t flexcan_irq
00000000 t flexcan_get_berr_counter
00000000 t flexcan_close
00000000 t flexcan_probe
00000000 t flexcan_open
00000000 r flexcan_of_match

WishWish

ifconfig -a

877509395@qq.co

ifconfig -a也没有
debian@npi:~$ ifconfig -a
eth1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether a2:0f:73:cf:3a:17  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth2: flags=-28605<UP,BROADCAST,RUNNING,MULTICAST,DYNAMIC>  mtu 1500
        inet 192.168.8.101  netmask 255.255.255.0  broadcast 192.168.8.255
        inet6 fe80::cca9:42ff:fe8a:477d  prefixlen 64  scopeid 0x20<link>
        ether ce:a9:42:8a:47:7d  txqueuelen 1000  (Ethernet)
        RX packets 235  bytes 34942 (34.1 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 206  bytes 18649 (18.2 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 84  bytes 7004 (6.8 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 84  bytes 7004 (6.8 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

sit0: flags=128<NOARP>  mtu 1480
        sit  txqueuelen 1000  (IPv6-in-IPv4)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wx_bpeAXOq9

877509395@qq.co 发表于 2021-3-19 18:31
ifconfig -a也没有
debian@npi:~$ ifconfig -a
eth1: flags=4099  mtu 1500

设备树插件开了没