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NFSv4: Return unreferenced delegations more promptly

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If the client is not using a delegation, the right thing to do is to return
it as soon as possible. This helps reduce the amount of state the server
has to track, as well as reducing the potential for conflicts with other
clients.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust
2008-12-23 15:21:52 -05:00
parent 6411bd4a47
commit b7391f44f2
4 changed files with 49 additions and 13 deletions
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2
fs/nfs/nfs4proc.c
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@@ -421,6 +421,7 @@ static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_fla
return 0;
if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
return 0;
nfs_mark_delegation_referenced(delegation);
return 1;
}
@@ -505,6 +506,7 @@ static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stat
else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
goto no_delegation_unlock;
nfs_mark_delegation_referenced(deleg_cur);
__update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
ret = 1;
no_delegation_unlock: