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| author | Alexandros Batsakis <batsakis@netapp.com> | 2010-02-05 14:45:06 +0300 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2010-03-02 21:00:03 +0300 |
| commit | 0851de06174e9800e76b26e4be0ca94294c09c8c (patch) | |
| tree | 4049cd2aaa462eb0f4d206d3f8a07afa13f2c96d | |
| parent | 7135840fc74699513d50e0c9c64922f2d38aa5e3 (diff) | |
| download | linux-0851de06174e9800e76b26e4be0ca94294c09c8c.tar.xz | |
nfs4: renewd renew operations should take/put a client reference
renewd sends RENEW requests to the NFS server in order to renew state.
As the request is asynchronous, renewd should take a reference to the
nfs_client to prevent concurrent umounts from freeing the client
Signed-off-by: Alexandros Batsakis <batsakis@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/nfs/nfs4proc.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 663ae0c36834..68f1fe00c08c 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -3152,7 +3152,9 @@ static void nfs4_renew_release(void *data) { struct nfs_client *clp = data; - nfs4_schedule_state_renewal(clp); + if (atomic_read(&clp->cl_count) > 1) + nfs4_schedule_state_renewal(clp); + nfs_put_client(clp); } static void nfs4_renew_done(struct rpc_task *task, void *data) @@ -3185,6 +3187,8 @@ int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred) .rpc_cred = cred, }; + if (!atomic_inc_not_zero(&clp->cl_count)) + return -EIO; return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT, &nfs4_renew_ops, clp); } |