SMB2 Protocol Complete: 18/18 Commands, 348/348 PASS

The last two SMB2 commands land in d73f287: CHANGE_NOTIFY (cmd 15, async directory-change subscription) and OPLOCK_BREAK (cmd 18, oplock downgrade). The SMB2 standard codec is now complete. 18/18 · 348/348 ALL PASS

The final two: CHANGE_NOTIFY and OPLOCK_BREAK

CHANGE_NOTIFY (cmd 15)

Async directory-change subscription. The client registers a watch on a directory handle; the server delivers FileNotifyInformation records when the watched directory changes. Filter bits:

file_name — file name changes
dir_name — subdirectory name changes
attributes — attribute changes
size — file size changes
last_write — last-write timestamp changes
last_access — last-access timestamp changes
creation — creation timestamp changes
security — security descriptor changes

The WATCH_TREE flag enables recursive subdirectory monitoring. The parser copies FileNotifyInformation records: each record is a NextEntryOffset + Action + FileName triple. Records are linked by NextEntryOffset; the last record has offset 0.

OPLOCK_BREAK (cmd 18)

Client downgrades an oplock it holds; the server echoes the granted level back. Two granted levels: NONE=0 (oplock fully released) or LEVEL_II=1 (downgraded to shared read-caching). The break handshake closes the oplock negotiation loop opened during CREATE.

Full SMB2 command table — 18/18

Cmd	Name	Description	Status
0	`NEGOTIATE`	Protocol version + dialect negotiation	PASS
1	`SESSION_SETUP`	Authentication + session establishment	PASS
2	`LOGOFF`	Session teardown	PASS
3	`TREE_CONNECT`	Share mount	PASS
4	`TREE_DISCONNECT`	Share unmount	PASS
5	`CREATE`	File/directory open or create	PASS
6	`CLOSE`	File handle close	PASS
7	`FLUSH`	Flush file data to stable storage	PASS
8	`READ`	File read	PASS
9	`WRITE`	File write	PASS
10	`LOCK`	Byte-range lock/unlock	PASS
11	`IOCTL`	FSCTL dispatch	PASS
12	`CANCEL`	Async request cancel	PASS
13	`ECHO`	Keep-alive ping	PASS
14	`QUERY_DIRECTORY`	Directory enumeration	PASS
15	`CHANGE_NOTIFY`	Async dir-change subscription	PASS
16	`QUERY_INFO`	File/directory info query	PASS
17	`SET_INFO`	File/directory info set	PASS
18	`OPLOCK_BREAK`	Client oplock downgrade	PASS

348/348 ALL PASS

Before the CHANGE_NOTIFY and OPLOCK_BREAK push, NFS3 LINK (proc 15) also closed — that completed the NFS3 standard 15-procedure set at 347/347 ALL PASS. The two SMB2 additions bring the total to 348/348. Both protocol stacks are now at full standard coverage with zero regressions across the combined suite.