GetAllSessions returns all session info from cache.

Label (Session Token, except in Start Request).

Label (* in /etc/sonic/checkpoints/*.cp.json) (Future).

Label (Arbitrary Filename *.json in the /etc dir) (Future).

Op not allowed on active CS.

Op not allowed in current CS state.

CS active on different terminal.

CS owned by someone else.

Lookup by name failed.

Op not allowed on suspended CS.

Lookup by token failed.

Any unexpected CS context (mostly code error).

CsStatusAbortWarning indicates completion of CS Abort operation with warnings.

CsStatusCommitWarning indicates completion of CS Commit operation with warnings.

CsStatusInvalidSession indicates session lookup failures or bad state.

CsStatusNotAllowed indicates user authorization error.

GSOname option requires name to match.

GSOstrict option requires session pid and username to match.