Linux - Device-to-Bus Mapping

Block Device Bus

ls -l /sys/block

lrwxrwxrwx. 1 root root 0 May 2 06:33 dm-0 -> ../devices/virtual/block/dm-0 lrwxrwxrwx. 1 root root 0 May 2 06:33 dm-1 -> ../devices/virtual/block/dm-1 lrwxrwxrwx. 1 root root 0 May 2 06:33 dm-2 -> ../devices/virtual/block/dm-2 lrwxrwxrwx. 1 root root 0 May 2 06:33 nvme0n1 -> ../devices/pci0005:00/0005:00:05.0/0005:02:00.0/nvme/nvme0/nvme0n1 lrwxrwxrwx. 1 root root 0 May 2 06:33 nvme1n1 -> ../devices/pci0005:00/0005:00:07.0/0005:03:00.0/nvme/nvme1/nvme1n1 lrwxrwxrwx. 1 root root 0 May 2 06:33 sda -> ../devices/pci0000:00/0000:00:01.0/0000:01:00.0/ata2/host1/target1:0:0/1:0:0:0/block/sda lrwxrwxrwx. 1 root root 0 May 2 06:33 sdb -> ../devices/pci0004:00/0004:00:03.0/0004:03:00.0/usb1/1-1/1-1.2/1-1.2:1.0/host13/target13:0:0/13:0:0:0/block/sdb lrwxrwxrwx. 1 root root 0 May 2 06:33 sr0 -> ../devices/pci0004:00/0004:00:03.0/0004:03:00.0/usb1/1-1/1-1.1/1-1.1:1.0/host12/target12:0:0/12:0:0:0/block/sr0

Net Device Bus

ls -l /sys/class/net

lrwxrwxrwx. 1 root root 0 May 2 06:33 enP4p3s0u1u3c2 -> ../../devices/pci0004:00/0004:00:03.0/0004:03:00.0/usb1/1-1/1-1.3/1-1.3:2.0/net/enP4p3s0u1u3c2 lrwxrwxrwx. 1 root root 0 May 2 06:33 enP9p3s0 -> ../../devices/pci0009:00/0009:00:05.0/0009:03:00.0/net/enP9p3s0 lrwxrwxrwx. 1 root root 0 May 2 06:33 lo -> ../../devices/virtual/net/lo

IPMI Device Bus

ls -l /sys/class/ipmi

lrwxrwxrwx. 1 root root 0 May 2 13:04 ipmi0 -> ../../devices/platform/APMC0D0F:00/i2c-0/i2c-AMPC0004:00/ipmi/ipmi0

Other Device Buses

Most links of devices can be found under /sys/class.

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