From: Benny Halevy Date: Tue, 11 May 2010 21:13:29 +0000 (+0300) Subject: nfsd4: introduce nfs4_client.cl_refcount X-Git-Tag: v2.6.35-rc3~16^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=46583e2597af649f134462d2f2c1be5e6689198d;p=platform%2Fkernel%2Flinux-3.10.git nfsd4: introduce nfs4_client.cl_refcount Currently just initialize the cl_refcount to 1 and decrement in expire_client(), conditionally freeing the client when the refcount reaches 0. To be used later by nfsv4.1 compounds to keep the client from timing out while in use. Signed-off-by: Benny Halevy Signed-off-by: J. Bruce Fields --- diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index dede43c..e439a88 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -740,8 +740,9 @@ expire_client(struct nfs4_client *clp) list_del(&clp->cl_strhash); spin_lock(&client_lock); unhash_client_locked(clp); + if (atomic_read(&clp->cl_refcount) == 0) + free_client(clp); spin_unlock(&client_lock); - free_client(clp); } static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) @@ -827,6 +828,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, } memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); + atomic_set(&clp->cl_refcount, 0); atomic_set(&clp->cl_cb_set, 0); INIT_LIST_HEAD(&clp->cl_idhash); INIT_LIST_HEAD(&clp->cl_strhash); diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h index 98836fd..ee42a0b 100644 --- a/fs/nfsd/state.h +++ b/fs/nfsd/state.h @@ -233,6 +233,8 @@ struct nfs4_client { struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ u32 cl_exchange_flags; struct nfs4_sessionid cl_sessionid; + /* number of rpc's in progress over an associated session: */ + atomic_t cl_refcount; /* for nfs41 callbacks */ /* We currently support a single back channel with a single slot */