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| author | Muneendra Kumar <muneendra.kumar@broadcom.com> | 2021-09-12 18:58:53 -0700 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-09-14 23:38:58 -0400 |
| commit | e9d73bfa8e047fbb078213e607019c701cd9f888 (patch) | |
| tree | 02fce549ae66a4a13e9097fbd9dab180cec9efae /Documentation | |
| parent | 0a5e20fc8ca7ed10b8865421a7c1e8d460840956 (diff) | |
| download | linux-e9d73bfa8e047fbb078213e607019c701cd9f888.tar.bz2 | |
scsi: documentation: Document Fibre Channel sysfs node for appid
Update documentation for sysfs node within /sys/class/fc/fc_udev_device/.
Link: https://lore.kernel.org/r/20210913015853.2086512-1-muneendra.kumar@broadcom.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Muneendra Kumar <muneendra.kumar@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-fc | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-class-fc b/Documentation/ABI/testing/sysfs-class-fc new file mode 100644 index 000000000000..3057a6d3b8cf --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-fc @@ -0,0 +1,27 @@ +What: /sys/class/fc/fc_udev_device/appid_store +Date: Aug 2021 +Contact: Muneendra Kumar <muneendra.kumar@broadconm.com> +Description: + This interface allows an admin to set an FC application + identifier in the blkcg associated with a cgroup id. The + identifier is typically a UUID that is associated with + an application or logical entity such as a virtual + machine or container group. The application or logical + entity utilizes a block device via the cgroup id. + FC adapter drivers may query the identifier and tag FC + traffic based on the identifier. FC host and FC fabric + entities can utilize the application id and FC traffic + tag to identify traffic sources. + + The interface expects a string "<cgroupid>:<appid>" where: + <cgroupid> is inode of the cgroup in hexadecimal + <appid> is user provided string upto 128 characters + in length. + + If an appid_store is done for a cgroup id that already + has an appid set, the new value will override the + previous value. + + If an admin wants to remove an FC application identifier + from a cgroup, an appid_store should be done with the + following string: "<cgroupid>:" |