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| author | Chuck Lever <chuck.lever@oracle.com> | 2012-07-11 16:29:56 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-07-16 14:48:10 -0400 |
| commit | 89af2739589365bf0dd2023c6a076b22ccd530f9 (patch) | |
| tree | 91608923b32aa16c7bf013bfb25d6006266c89a1 | |
| parent | 377e507d1572eca6372c862483f4ce4680ad310a (diff) | |
| download | linux-89af2739589365bf0dd2023c6a076b22ccd530f9.tar.gz linux-89af2739589365bf0dd2023c6a076b22ccd530f9.tar.bz2 linux-89af2739589365bf0dd2023c6a076b22ccd530f9.zip | |
NFS: Don't free a state ID the server does not recognize
The result of a TEST_STATEID operation can indicate a few different
things:
o If NFS_OK is returned, then the client can continue using the
state ID under test, and skip recovery.
o RFC 5661 says that if the state ID was revoked, then the client
must perform an explicit FREE_STATEID before trying to re-open.
o If the server doesn't recognize the state ID at all, then no
FREE_STATEID is needed, and the client can immediately continue
with open recovery.
Let's err on the side of caution: if the server clearly tells us the
state ID is unknown, we skip the FREE_STATEID. For any other error,
we issue a FREE_STATEID. Sometimes that FREE_STATEID will be
unnecessary, but leaving unused state IDs on the server needlessly
ties up resources.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index af3abf957f2c..afd61d72837d 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1764,7 +1764,8 @@ static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *s if (state->flags & flags) { status = nfs41_test_stateid(server, stateid); if (status != NFS_OK) { - nfs41_free_stateid(server, stateid); + if (status != -NFS4ERR_BAD_STATEID) + nfs41_free_stateid(server, stateid); state->flags &= ~flags; } } @@ -4697,7 +4698,9 @@ static int nfs41_check_expired_locks(struct nfs4_state *state) if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { status = nfs41_test_stateid(server, &lsp->ls_stateid); if (status != NFS_OK) { - nfs41_free_stateid(server, &lsp->ls_stateid); + if (status != -NFS4ERR_BAD_STATEID) + nfs41_free_stateid(server, + &lsp->ls_stateid); lsp->ls_flags &= ~NFS_LOCK_INITIALIZED; ret = status; } |