setupTestFs takes a filesystem description as a variable and setups the desired structure under a temp directory.

Create validates a volume specification and then proceed with creating the volume under the controlled root directory.

SetQuota assigns a unique project id to a directory and then set the quota for that projectId.

Delete tries to delete a volume by its name. ps.: Deleting a volume that doesn't exist is considered an error.

Get tries to retrieve a volume by its name (not path). For instance, if the root path that the manager controls is `/mnt/xfs/volumes`, then a volume

isValidName verifies whether a given name is considered valid or not based on a constant naming regular expression.

GetQuota retrieves the quota settings associated with a targetPath that previously had a quota set for it. TODO differentiate between real errors and

List lists all the volumes that have been created under a given root path that is controlled by this manager.

GeneratePathToProjectIdMap creates a map that maps the projectIds associated with paths directly under a giving root path.

GetBackingFsBlockDev retrieves the absolute path of the backing block device configured for the current quota control instance.

GetProjectId retrieves the extended attribute projectid associated with a given directory.

GetProjectQuota retrieves the quota settings associated with a project-id controlled by a given block device. The values prefixed with `Used` indicat

MakeBackingFsDev creates a block device under the directory specified in the `root` argument.

SetProjectId sets the value of the extended attribute projectid associated with a given directory, as well as setting necessary flags (PROJINHERIT).

SetProjectQuota sets quota settings associated with a given projectId controlled by a given block device. The values that are not prefixed with `Used

makeBigString creates a string filled with a single character that is `size` big.

TODO is it global?

CreateFiles creates a bunch of files under a given base directory specified.

IsQuotaEnabled checks whether a given filesystem mount indicated by a block device has project quota accounting and enforcement ON.

New instantiates a new manager that is meant to take care of volume creation, listing, updating and stats retrieval under a given root path.

NewControl initializes project quota support under a given preconfigured BasePath. It does so by creating a block device right at BasePath and then h

WriteBytes writes a given number of bytes in the form of 'character' to a given writer.