We'll need a way to flag the nfs4_client as already being recorded on
stable storage so that we don't continually upcall.
The cl_cb_flags field is only using 2 bits right now, so repurpose that
to a generic flags field. Rename NFSD4_CLIENT_KILL to
NFSD4_CLIENT_CB_KILL to make it evident that it's part of the callback
flags. Add a mask that we can use for existing checks that look to see
whether any flags are set, so that the new STABLE flag doesn't
interfere.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/nfsd/nfs4callback.c | 12 ++++++------
fs/nfsd/state.h | 8 +++++---
2 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7748d6a..dc5da6b 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -756,7 +756,7 @@ void nfsd4_probe_callback(struct nfs4_client *clp)
{
/* XXX: atomicity? Also, should we be using cl_cb_flags? */
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
- set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags);
+ set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
do_probe_callback(clp);
}
@@ -915,7 +915,7 @@ void nfsd4_destroy_callback_queue(void)
/* must be called under the state lock */
void nfsd4_shutdown_callback(struct nfs4_client *clp)
{
- set_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags);
+ set_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags);
/*
* Note this won't actually result in a null callback;
* instead, nfsd4_do_callback_rpc() will detect the killed
@@ -966,15 +966,15 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
svc_xprt_put(clp->cl_cb_conn.cb_xprt);
clp->cl_cb_conn.cb_xprt = NULL;
}
- if (test_bit(NFSD4_CLIENT_KILL, &clp->cl_cb_flags))
+ if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags))
return;
spin_lock(&clp->cl_lock);
/*
* Only serialized callback code is allowed to clear these
* flags; main nfsd code can only set them:
*/
- BUG_ON(!clp->cl_cb_flags);
- clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_cb_flags);
+ BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));
+ clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
memcpy(&conn, &cb->cb_clp->cl_cb_conn, sizeof(struct nfs4_cb_conn));
c = __nfsd4_find_backchannel(clp);
if (c) {
@@ -1000,7 +1000,7 @@ void nfsd4_do_callback_rpc(struct work_struct *w)
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
- if (clp->cl_cb_flags)
+ if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client;
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index b07f5ea..1a21547 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -250,9 +250,11 @@ struct nfs4_client {
/* for v4.0 and v4.1 callbacks: */
struct nfs4_cb_conn cl_cb_conn;
-#define NFSD4_CLIENT_CB_UPDATE 1
-#define NFSD4_CLIENT_KILL 2
- unsigned long cl_cb_flags;
+#define NFSD4_CLIENT_STABLE (0) /* client on stable storage */
+#define NFSD4_CLIENT_CB_UPDATE (1)
+#define NFSD4_CLIENT_CB_KILL (2)
+#define NFSD4_CLIENT_CB_FLAG_MASK (0x6)
+ unsigned long cl_flags;
struct rpc_clnt *cl_cb_client;
u32 cl_cb_ident;
#define NFSD4_CB_UP 0
--
1.7.1
--
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