forked from luck/tmp_suning_uos_patched
nfsd: split nfsd4_callback initialization and use
Split out initializing the nfs4_callback structure from using it. For the NULL callback this gets rid of tons of pointless re-initializations. Note that I don't quite understand what protects us from running multiple NULL callbacks at the same time, but at least this chance doesn't make it worse.. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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@ -743,11 +743,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
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static struct workqueue_struct *callback_wq;
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static void do_probe_callback(struct nfs4_client *clp)
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{
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return nfsd4_cb(&clp->cl_cb_null, clp, NFSPROC4_CLNT_CB_NULL);
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}
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/*
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* Poke the callback thread to process any updates to the callback
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* parameters, and send a null probe.
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@ -756,7 +751,7 @@ void nfsd4_probe_callback(struct nfs4_client *clp)
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{
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clp->cl_cb_state = NFSD4_CB_UNKNOWN;
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set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
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do_probe_callback(clp);
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nfsd4_run_cb(&clp->cl_cb_null);
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}
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void nfsd4_probe_callback_sync(struct nfs4_client *clp)
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@ -912,7 +907,7 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp)
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* instead, nfsd4_run_cb_null() will detect the killed
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* client, destroy the rpc client, and stop:
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*/
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do_probe_callback(clp);
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nfsd4_run_cb(&clp->cl_cb_null);
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flush_workqueue(callback_wq);
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}
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@ -1025,7 +1020,7 @@ nfsd4_run_cb_recall(struct work_struct *w)
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nfsd4_run_callback_rpc(cb);
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}
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void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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enum nfsd4_cb_op op)
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{
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cb->cb_clp = clp;
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@ -1038,6 +1033,9 @@ void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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cb->cb_ops = &nfsd4_cb_recall_ops;
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INIT_LIST_HEAD(&cb->cb_per_client);
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cb->cb_done = true;
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}
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void nfsd4_run_cb(struct nfsd4_callback *cb)
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{
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queue_work(callback_wq, &cb->cb_work);
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}
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@ -645,6 +645,9 @@ alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh)
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INIT_LIST_HEAD(&dp->dl_perclnt);
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INIT_LIST_HEAD(&dp->dl_recall_lru);
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dp->dl_type = NFS4_OPEN_DELEGATE_READ;
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dp->dl_retries = 1;
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nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
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NFSPROC4_CLNT_CB_RECALL);
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INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall);
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return dp;
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out_dec:
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@ -1869,6 +1872,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
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free_client(clp);
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return NULL;
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}
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nfsd4_init_cb(&clp->cl_cb_null, clp, NFSPROC4_CLNT_CB_NULL);
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INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null);
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clp->cl_time = get_seconds();
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clear_bit(0, &clp->cl_cb_slot_busy);
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@ -3388,9 +3392,7 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
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* it's safe to take a reference.
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*/
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atomic_inc(&dp->dl_stid.sc_count);
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dp->dl_retries = 1;
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nfsd4_cb(&dp->dl_recall, dp->dl_stid.sc_client,
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NFSPROC4_CLNT_CB_RECALL);
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nfsd4_run_cb(&dp->dl_recall);
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}
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/* Called from break_lease() with i_lock held. */
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@ -543,8 +543,9 @@ void nfsd4_run_cb_recall(struct work_struct *w);
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extern void nfsd4_probe_callback(struct nfs4_client *clp);
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extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
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extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
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extern void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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enum nfsd4_cb_op op);
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extern void nfsd4_run_cb(struct nfsd4_callback *cb);
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extern int nfsd4_create_callback_queue(void);
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extern void nfsd4_destroy_callback_queue(void);
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extern void nfsd4_shutdown_callback(struct nfs4_client *);
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