nfsd4: keep finer-grained callback status
Distinguish between when the callback channel is known to be down, and
when it is not yet confirmed. This will be useful in the 4.1 case.
Also, we don't seem to be using the fact that this field is atomic.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 290370b..919ad25 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1071,7 +1071,7 @@
memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
atomic_set(&clp->cl_refcount, 0);
- atomic_set(&clp->cl_cb_set, 0);
+ clp->cl_cb_state = NFSD4_CB_UNKNOWN;
INIT_LIST_HEAD(&clp->cl_idhash);
INIT_LIST_HEAD(&clp->cl_strhash);
INIT_LIST_HEAD(&clp->cl_openowners);
@@ -2003,7 +2003,6 @@
if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
status = nfserr_clid_inuse;
else {
- atomic_set(&conf->cl_cb_set, 0);
nfsd4_change_callback(conf, &unconf->cl_cb_conn);
nfsd4_probe_callback(conf);
expire_client(unconf);
@@ -2633,7 +2632,8 @@
{
struct nfs4_delegation *dp;
struct nfs4_stateowner *sop = stp->st_stateowner;
- int cb_up = atomic_read(&sop->so_client->cl_cb_set);
+ /* XXX: or unknown and nfsv4.1: */
+ int cb_up = (sop->so_client->cl_cb_state == NFSD4_CB_UP);
struct file_lock *fl;
int status, flag = 0;
@@ -2823,7 +2823,7 @@
renew_client(clp);
status = nfserr_cb_path_down;
if (!list_empty(&clp->cl_delegations)
- && !atomic_read(&clp->cl_cb_set))
+ && clp->cl_cb_state != NFSD4_CB_UP)
goto out;
status = nfs_ok;
out: