lwn.git/fs/nfs/delegation.c, branch docs-4.16

NFSv4: Retry CLOSE and DELEGRETURN on NFS4ERR_OLD_STATEID.

2017-11-17T21:43:47+00:00

If we're racing with an OPEN, then retry the operation instead of declaring it a success. Signed-off-by: Trond Myklebust [Andrew W Elble: Fix a typo in nfs4_refresh_open_stateid] Signed-off-by: Anna Schumaker

NFS: Use an atomic_long_t to count the number of requests

2017-08-15T15:54:47+00:00

Rather than forcing us to take the inode->i_lock just in order to bump the number. Signed-off-by: Trond Myklebust

NFSv4: Optimise away forced revalidation when we know the attributes are OK

2016-12-01T22:21:37+00:00

The NFS_INO_REVAL_FORCED flag needs to be set if we just got a delegation, and we see that there might still be some ambiguity as to whether or not our attribute or data cache are valid. In practice, this means that a call to nfs_check_inode_attributes() will have noticed a discrepancy between cached attributes and measured ones, so let's move the setting of NFS_INO_REVAL_FORCED to there. Signed-off-by: Trond Myklebust

NFS: Always call nfs_inode_find_state_and_recover() when revoking a delegation

2016-09-27T18:35:04+00:00

Don't rely on nfs_inode_detach_delegation() succeeding. That can race... Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4: Fix a race in nfs_inode_reclaim_delegation()

2016-09-27T18:34:54+00:00

If we race with a delegreturn before taking the spin lock, we currently end up dropping the delegation stateid. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4: nfs_inode_find_state_and_recover() should check all stateids

2016-09-27T18:34:35+00:00

Modify the helper nfs_inode_find_state_and_recover() so that it can check all open/lock/delegation state trackers on that inode for whether or not they need are affected by a revoked stateid error. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4: Ensure we don't re-test revoked and freed stateids

2016-09-27T18:34:31+00:00

This fixes a potential infinite loop in nfs_reap_expired_delegations. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4.1: Deal with server reboots during delegation expiration recovery

2016-09-27T18:33:49+00:00

Ensure that if the server reboots while we're testing and recovering from revoked delegations, we exit to allow the state manager to handle matters. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4.1: Test delegation stateids when server declares "some state revoked"

2016-09-27T18:33:44+00:00

According to RFC5661, if any of the SEQUENCE status bits SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED, SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED, SEQ4_STATUS_ADMIN_STATE_REVOKED, or SEQ4_STATUS_RECALLABLE_STATE_REVOKED are set, then we need to use TEST_STATEID to figure out which stateids have been revoked, so we can acknowledge the loss of state using FREE_STATEID. While we already do this for open and lock state, we have not been doing so for all the delegations. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker

NFSv4.x: Allow callers of nfs_remove_bad_delegation() to specify a stateid

2016-09-27T18:33:37+00:00

Allow the callers of nfs_remove_bad_delegation() to specify the stateid that needs to be marked as bad. Signed-off-by: Trond Myklebust Tested-by: Oleg Drokin Signed-off-by: Anna Schumaker