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linux-imx/Documentation/ABI/testing/sysfs-class-rnbd-server
Jack Wang 765c5c56ff Documentation/ABI/rnbd-srv: add document for force_close 
describe force_close of device

Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-04 09:41:10 -07:00

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What: /sys/class/rnbd-server Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: provide information about RNBD-server.

What: /sys/class/rnbd-server/ctl/ Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: When a client maps a device, a directory entry with the name of the block device is created under /sys/class/rnbd-server/ctl/devices/.

What: /sys/class/rnbd-server/ctl/devices/<device_name>/block_dev Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: Is a symlink to the sysfs entry of the exported device.

	Example:
	block_dev -> ../../../../class/block/ram0

What: /sys/class/rnbd-server/ctl/devices/<device_name>/sessions/ Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: For each client a particular device is exported to, following directory will be created:

	/sys/class/rnbd-server/ctl/devices/<device_name>/sessions/<session-name>/

	When the device is unmapped by that client, the directory will be removed.

What: /sys/class/rnbd-server/ctl/devices/<device_name>/sessions//read_only Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: Contains '1' if device is mapped read-only, otherwise '0'.

What: /sys/class/rnbd-server/ctl/devices/<device_name>/sessions//mapping_path Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: Contains the relative device path provided by the user during mapping.

What: /sys/class/rnbd-server/ctl/devices/<device_name>/sessions//access_mode Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: Contains the device access mode: ro, rw or migration.

What: /sys/class/rnbd-server/ctl/devices/<device_name>/sessions//force_close Date: Nov 2020 KernelVersion: 5.10 Contact: Jack Wang jinpu.wang@cloud.ionos.com Danil Kipnis danil.kipnis@cloud.ionos.com Description: Write "1" to the file to close the device on server side. Please note that the client side device will not be closed, read or write to the device will get -ENOTCONN.