What:		/sys/fs/incremental-fs/features/corefs
Date:		2019
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Reads 'supported'. Always present.

What:		/sys/fs/incremental-fs/features/v2
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Reads 'supported'. Present if all v2 features of incfs are
		supported.

What:		/sys/fs/incremental-fs/features/zstd
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Reads 'supported'. Present if zstd compression is supported
		for data blocks.

What:		/sys/fs/incremental-fs/instances/[name]
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Folder created when incfs is mounted with the sysfs_name=[name]
		option. If this option is used, the following values are created
		in this folder.

What:		/sys/fs/incremental-fs/instances/[name]/reads_delayed_min
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns a count of the number of reads that were delayed as a
		result of the per UID read timeouts min time setting.

What:		/sys/fs/incremental-fs/instances/[name]/reads_delayed_min_us
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns total delay time for all files since first mount as a
		result of the per UID read timeouts min time setting.

What:		/sys/fs/incremental-fs/instances/[name]/reads_delayed_pending
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns a count of the number of reads that were delayed as a
		result of waiting for a pending read.

What:		/sys/fs/incremental-fs/instances/[name]/reads_delayed_pending_us
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns total delay time for all files since first mount as a
		result of waiting for a pending read.

What:		/sys/fs/incremental-fs/instances/[name]/reads_failed_hash_verification
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns number of reads that failed because of hash verification
		failures.

What:		/sys/fs/incremental-fs/instances/[name]/reads_failed_other
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns number of reads that failed for reasons other than
		timing out or hash failures.

What:		/sys/fs/incremental-fs/instances/[name]/reads_failed_timed_out
Date:		April 2021
Contact:	Paul Lawrence <paullawrence@google.com>
Description:	Returns number of reads that timed out.