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nfsd41: Backchannel: Server backchannel RPC wait queue

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RPC callback requests will wait on this wait queue if the backchannel
is out of slots.

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Ricardo Labiaga 2009-09-10 12:26:25 +03:00 • committed by J. Bruce Fields
parent 132f97715c
commit 199ff35e1c
2 changed files with 6 additions and 0 deletions
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2
fs/nfsd/nfs4state.c
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@ -775,6 +775,8 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir)
INIT_LIST_HEAD(&clp->cl_delegations); INIT_LIST_HEAD(&clp->cl_delegations);
INIT_LIST_HEAD(&clp->cl_sessions); INIT_LIST_HEAD(&clp->cl_sessions);
INIT_LIST_HEAD(&clp->cl_lru); INIT_LIST_HEAD(&clp->cl_lru);
clear_bit(0, &clp->cl_cb_slot_busy);
rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
return clp; return clp;
} }

4
include/linux/nfsd/state.h
View file

@ -219,7 +219,11 @@ struct nfs4_client {
struct nfs4_sessionid cl_sessionid; struct nfs4_sessionid cl_sessionid;
/* for nfs41 callbacks */ /* for nfs41 callbacks */
/* We currently support a single back channel with a single slot */
unsigned long cl_cb_slot_busy;
struct svc_xprt *cl_cb_xprt; /* 4.1 callback transport */ struct svc_xprt *cl_cb_xprt; /* 4.1 callback transport */
struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
/* wait here for slots */
}; };
/* struct nfs4_client_reset /* struct nfs4_client_reset