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nfsd4: allow restarting callbacks

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If we lose the backchannel and then the client repairs the problem,
resend any callbacks.

We use a new cb_done flag to track whether there is still work to be
done for the callback or whether it can be destroyed with the rpc.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields
2011-01-10 16:44:41 -05:00
parent 3ff3600e7e
commit 5ce8ba25d6
3 changed files with 32 additions and 6 deletions
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3
fs/nfsd/state.h
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@@ -68,10 +68,12 @@ typedef struct {
struct nfsd4_callback {
void *cb_op;
struct nfs4_client *cb_clp;
struct list_head cb_per_client;
u32 cb_minorversion;
struct rpc_message cb_msg;
const struct rpc_call_ops *cb_ops;
struct work_struct cb_work;
bool cb_done;
};
struct nfs4_delegation {
@@ -248,6 +250,7 @@ struct nfs4_client {
int cl_cb_state;
struct nfsd4_callback cl_cb_null;
struct nfsd4_session *cl_cb_session;
struct list_head cl_callbacks; /* list of in-progress callbacks */
/* for all client information that callback code might need: */
spinlock_t cl_lock;