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nfsd: introduce a generic nfsd4_cb
Add a helper to queue up a callback. CB_NULL has a bit of special casing because it is special in the specification, but all other new callback operations will be able to share code with this and a few more changes to refactor the callback code. 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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parent
2faf3b4350
commit
326129d02a
3 changed files with 22 additions and 35 deletions
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@ -49,12 +49,6 @@ static void nfsd4_mark_cb_fault(struct nfs4_client *, int reason);
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/* Index of predefined Linux callback client operations */
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enum {
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NFSPROC4_CLNT_CB_NULL = 0,
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NFSPROC4_CLNT_CB_RECALL,
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NFSPROC4_CLNT_CB_SEQUENCE,
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};
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#define to_delegation(cb) \
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container_of(cb, struct nfs4_delegation, dl_recall)
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@ -749,24 +743,9 @@ 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 run_nfsd4_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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static void do_probe_callback(struct nfs4_client *clp)
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{
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struct nfsd4_callback *cb = &clp->cl_cb_null;
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cb->cb_clp = clp;
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cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL];
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cb->cb_msg.rpc_argp = NULL;
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cb->cb_msg.rpc_resp = NULL;
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cb->cb_ops = &nfsd4_cb_probe_ops;
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run_nfsd4_cb(cb);
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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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@ -1005,7 +984,7 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
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}
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/* Yay, the callback channel's back! Restart any callbacks: */
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list_for_each_entry(cb, &clp->cl_callbacks, cb_per_client)
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run_nfsd4_cb(cb);
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queue_work(callback_wq, &cb->cb_work);
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}
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static void
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@ -1046,21 +1025,19 @@ 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_recall(struct nfs4_delegation *dp)
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void nfsd4_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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struct nfsd4_callback *cb = &dp->dl_recall;
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struct nfs4_client *clp = dp->dl_stid.sc_client;
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dp->dl_retries = 1;
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cb->cb_clp = clp;
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cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL];
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cb->cb_msg.rpc_proc = &nfs4_cb_procedures[op];
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cb->cb_msg.rpc_argp = cb;
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cb->cb_msg.rpc_resp = cb;
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cb->cb_ops = &nfsd4_cb_recall_ops;
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if (op == NFSPROC4_CLNT_CB_NULL)
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cb->cb_ops = &nfsd4_cb_probe_ops;
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else
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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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run_nfsd4_cb(&dp->dl_recall);
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queue_work(callback_wq, &cb->cb_work);
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}
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@ -3388,7 +3388,9 @@ 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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nfsd4_cb_recall(dp);
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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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}
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/* Called from break_lease() with i_lock held. */
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@ -517,6 +517,13 @@ static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
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#define RD_STATE 0x00000010
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#define WR_STATE 0x00000020
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enum nfsd4_cb_op {
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NFSPROC4_CLNT_CB_NULL = 0,
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NFSPROC4_CLNT_CB_RECALL,
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NFSPROC4_CLNT_CB_SEQUENCE,
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};
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struct nfsd4_compound_state;
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struct nfsd_net;
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@ -536,7 +543,8 @@ 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_recall(struct nfs4_delegation *dp);
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extern void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
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enum nfsd4_cb_op op);
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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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