[root@host26 /]# ls -l /dev/disk/by-id/wwn-0x5000c5000f8f4583
lrwxrwxrwx. 1 root root 9 Oct 19 11:14 wwn-0x5000c5000f8f4583 -> ../../sdg
[root@host26 /]# ls /sys/block/sdg/device/scsi_disk
3:0:5:0
^
|
The above is the host{number} for the SCSI Host controller (in the above case "host3").
[root@host26 /]# ls /sys/class/scsi_host/host3
active_mode device io_delay scan unchecked_isa_dma version_nvdata_persistent
board_assembly device_delay logging_level sg_tablesize unique_id version_product
board_name fw_queue_depth power state version_bios
board_tracer fwfault_debug proc_name subsystem version_fw
can_queue host_busy prot_capabilities supported_mode version_mpi
cmd_per_lun host_sas_address prot_guard_type uevent version_nvdata_default
>From the above, there is no linkage to the PCI device corresponding to the above host controller. The only way I could establish the linkage was to actually start from the PCI device ID for this controller, and then, doing the following:
[root@host26 /]# ls /sys/class/pci_bus/0000:0c/device/0000:0c:00.0
broken_parity_status host3 numa_node resource subsystem_device
class irq pools resource0 subsystem_vendor
config local_cpulist power resource1 uevent
device local_cpus remove resource3 vendor
driver modalias rescan rom vpd
enable msi_bus reset subsystem
I think it is very useful to have the necessary linkage to get to the PCI device from the /sys/class/scsi_host/host3 entries.
Thanks,
- Kishore
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