From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
These patches add FREE_STATEID and TEST_STATEID to the NFS server. I initially
tested them by hard coding calls both before and after the client completes a
CLOSE operation. Eventually, I modified the client's state recovery code to
place these calls. I would turn off networking on the client for two minutes
so it would expired on the server and force recovery once networking was
reenabled.
I later added in a fault injection framework on the server. I would have the
client acquire a lock, tell the server to delete it, and then have the client
use TEST_STATEID and FREE_STATEID to recover the lock.
v2:
- FREE_STATEID
- Free open, lock, and delegation state ids correctly
- Use the check_for_locks() function to check for locks
- TEST_STATEID
- Remove openmode check
- Sanity check on size of stateid list
- Delay decoding stateid list until encoding the reply
v3:
- FREE_STATEID
- Open stateids and delegations are never freeable (return nfserr_locks_held)
- TEST_STATEID
- Remove unused arguments from a function call
- Store and use the HAS_SESSION flag for validating stateids
v4:
- FREE_STATEID
- Remove unused argument from nfs4_free_lock_stateid()
- TEST_STATEID
- Remove double call to nfs4_validate_stateid()
v5:
- FREE_STATEID
- Acquire the state lock before using the state lists
- TEST_STATEID
- Acquire the state lock before using the state lists
- Bryan
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