| 1 | package stopevidence |
| 2 | |
| 3 | import "errors" |
| 4 | |
| 5 | // ErrForeignHolder is a database descriptor that root's observation cannot |
| 6 | // attribute to the admitted session's replicator. |
| 7 | var ErrForeignHolder = errors.New("stopevidence: a descriptor other than the replicator's holds the database") |
| 8 | |
| 9 | // Descriptor is one open descriptor root observed holding a watched file: |
| 10 | // the process, the task whose table showed it, the descriptor number and |
| 11 | // the open file's device and inode. A zero identity is a match by name |
| 12 | // whose file could not be reached. |
| 13 | type Descriptor struct { |
| 14 | PID int `json:"pid"` |
| 15 | TID int `json:"tid"` |
| 16 | FD int `json:"fd"` |
| 17 | Device uint64 `json:"device"` |
| 18 | Inode uint64 `json:"inode"` |
| 19 | } |
| 20 | |
| 21 | // DescriptorHint is the agent's record of one of its own replicator's |
| 22 | // descriptors, taken from its own table when the replicator opened. It is a |
| 23 | // narrowing hint only (claim Plan 11, R3): root exempts a descriptor only |
| 24 | // when its own scan finds it in the agent's authenticated process, at this |
| 25 | // number, on this file. A hint never adds a holder or names a process. |
| 26 | type DescriptorHint struct { |
| 27 | FD int `json:"fd"` |
| 28 | Device uint64 `json:"device"` |
| 29 | Inode uint64 `json:"inode"` |
| 30 | } |
| 31 | |
| 32 | // FileIdentity names a file by device and inode, as the launch journal |
| 33 | // records it. |
| 34 | type FileIdentity struct { |
| 35 | Device uint64 `json:"device"` |
| 36 | Inode uint64 `json:"inode"` |
| 37 | } |
| 38 | |
| 39 | // Agent is the authenticated agent process root observed on its socket: |
| 40 | // its pid and its start time (field 22 of /proc/<pid>/stat). Root takes |
| 41 | // both from the peer credentials, never from a request. |
| 42 | type Agent struct { |
| 43 | PID int |
| 44 | Start string |
| 45 | } |
| 46 | |
amadan