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authorTrond Myklebust <Trond.Myklebust@netapp.com>2011-08-24 15:07:37 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2011-08-24 15:07:37 -0400
commit2f60ea6b8ceda61ae08bef71a652eac36ec193b3 (patch)
treef950b29615be254fb7f90a607caf3f307518a34b /fs/nfs/nfs4proc.c
parent8534d4ec055d854be6c94e8e5654fa87678ea5f7 (diff)
downloadlwn-2f60ea6b8ceda61ae08bef71a652eac36ec193b3.tar.gz
lwn-2f60ea6b8ceda61ae08bef71a652eac36ec193b3.zip
NFSv4: The NFSv4.0 client must send RENEW calls if it holds a delegation
RFC3530 states that if the client holds a delegation, then it is obliged to continue to send RENEW calls once every lease period in order to allow the server to return NFS4ERR_CB_PATH_DOWN if the callback path is unreachable. This is not required for NFSv4.1, since the server can at any time set the SEQ4_STATUS_CB_PATH_DOWN_SESSION in any SEQUENCE operation. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4proc.c')
-rw-r--r--fs/nfs/nfs4proc.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b358ec1d1711..e89940a2819d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3386,7 +3386,7 @@ static const struct rpc_call_ops nfs4_renew_ops = {
.rpc_release = nfs4_renew_release,
};
-static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
+static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
@@ -3395,6 +3395,8 @@ static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
};
struct nfs4_renewdata *data;
+ if (renew_flags == 0)
+ return 0;
if (!atomic_inc_not_zero(&clp->cl_count))
return -EIO;
data = kmalloc(sizeof(*data), GFP_NOFS);
@@ -5504,11 +5506,13 @@ static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_
return rpc_run_task(&task_setup_data);
}
-static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
+static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
{
struct rpc_task *task;
int ret = 0;
+ if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
+ return 0;
task = _nfs41_proc_sequence(clp, cred);
if (IS_ERR(task))
ret = PTR_ERR(task);