| Muneendra Kumar | e9d73bf | 2021-09-12 18:58:53 -0700 | [diff] [blame] | 1 | What: /sys/class/fc/fc_udev_device/appid_store |
| 2 | Date: Aug 2021 |
| 3 | Contact: Muneendra Kumar <muneendra.kumar@broadconm.com> |
| 4 | Description: |
| 5 | This interface allows an admin to set an FC application |
| 6 | identifier in the blkcg associated with a cgroup id. The |
| 7 | identifier is typically a UUID that is associated with |
| 8 | an application or logical entity such as a virtual |
| 9 | machine or container group. The application or logical |
| 10 | entity utilizes a block device via the cgroup id. |
| 11 | FC adapter drivers may query the identifier and tag FC |
| 12 | traffic based on the identifier. FC host and FC fabric |
| 13 | entities can utilize the application id and FC traffic |
| 14 | tag to identify traffic sources. |
| 15 | |
| 16 | The interface expects a string "<cgroupid>:<appid>" where: |
| 17 | <cgroupid> is inode of the cgroup in hexadecimal |
| 18 | <appid> is user provided string upto 128 characters |
| 19 | in length. |
| 20 | |
| 21 | If an appid_store is done for a cgroup id that already |
| 22 | has an appid set, the new value will override the |
| 23 | previous value. |
| 24 | |
| 25 | If an admin wants to remove an FC application identifier |
| 26 | from a cgroup, an appid_store should be done with the |
| 27 | following string: "<cgroupid>:" |