0001 What: /sys/class/fc/fc_udev_device/appid_store
0002 Date: Aug 2021
0003 Contact: Muneendra Kumar <muneendra.kumar@broadconm.com>
0004 Description:
0005 This interface allows an admin to set an FC application
0006 identifier in the blkcg associated with a cgroup id. The
0007 identifier is typically a UUID that is associated with
0008 an application or logical entity such as a virtual
0009 machine or container group. The application or logical
0010 entity utilizes a block device via the cgroup id.
0011 FC adapter drivers may query the identifier and tag FC
0012 traffic based on the identifier. FC host and FC fabric
0013 entities can utilize the application id and FC traffic
0014 tag to identify traffic sources.
0015
0016 The interface expects a string "<cgroupid>:<appid>" where:
0017 <cgroupid> is inode of the cgroup in hexadecimal
0018 <appid> is user provided string upto 128 characters
0019 in length.
0020
0021 If an appid_store is done for a cgroup id that already
0022 has an appid set, the new value will override the
0023 previous value.
0024
0025 If an admin wants to remove an FC application identifier
0026 from a cgroup, an appid_store should be done with the
0027 following string: "<cgroupid>:"
