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nfsd: split nfsd4_callback initialization and use

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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>
This commit is contained in:
Christoph Hellwig 2014-09-24 12:19:18 +02:00 committed by J. Bruce Fields
parent 326129d02a
commit f0b5de1b6b
3 changed files with 13 additions and 12 deletions
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14
fs/nfsd/nfs4callback.c
View File

@ -743,11 +743,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
static struct workqueue_struct *callback_wq;
static void do_probe_callback(struct nfs4_client *clp)
{
return nfsd4_cb(&clp->cl_cb_null, clp, NFSPROC4_CLNT_CB_NULL);
}
/*
* Poke the callback thread to process any updates to the callback
* parameters, and send a null probe.
@ -756,7 +751,7 @@ void nfsd4_probe_callback(struct nfs4_client *clp)
{
clp->cl_cb_state = NFSD4_CB_UNKNOWN;
set_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
do_probe_callback(clp);
nfsd4_run_cb(&clp->cl_cb_null);
}
void nfsd4_probe_callback_sync(struct nfs4_client *clp)
@ -912,7 +907,7 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp)
* instead, nfsd4_run_cb_null() will detect the killed
* client, destroy the rpc client, and stop:
*/
do_probe_callback(clp);
nfsd4_run_cb(&clp->cl_cb_null);
flush_workqueue(callback_wq);
}
@ -1025,7 +1020,7 @@ nfsd4_run_cb_recall(struct work_struct *w)
nfsd4_run_callback_rpc(cb);
}
void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
enum nfsd4_cb_op op)
{
cb->cb_clp = clp;
@ -1038,6 +1033,9 @@ void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
cb->cb_ops = &nfsd4_cb_recall_ops;
INIT_LIST_HEAD(&cb->cb_per_client);
cb->cb_done = true;
}
void nfsd4_run_cb(struct nfsd4_callback *cb)
{
queue_work(callback_wq, &cb->cb_work);
}

8
fs/nfsd/nfs4state.c
View File

@ -645,6 +645,9 @@ alloc_init_deleg(struct nfs4_client *clp, struct svc_fh *current_fh)
INIT_LIST_HEAD(&dp->dl_perclnt);
INIT_LIST_HEAD(&dp->dl_recall_lru);
dp->dl_type = NFS4_OPEN_DELEGATE_READ;
dp->dl_retries = 1;
nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client,
NFSPROC4_CLNT_CB_RECALL);
INIT_WORK(&dp->dl_recall.cb_work, nfsd4_run_cb_recall);
return dp;
out_dec:
@ -1869,6 +1872,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
free_client(clp);
return NULL;
}
nfsd4_init_cb(&clp->cl_cb_null, clp, NFSPROC4_CLNT_CB_NULL);
INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_run_cb_null);
clp->cl_time = get_seconds();
clear_bit(0, &clp->cl_cb_slot_busy);
@ -3388,9 +3392,7 @@ static void nfsd_break_one_deleg(struct nfs4_delegation *dp)
* it's safe to take a reference.
*/
atomic_inc(&dp->dl_stid.sc_count);
dp->dl_retries = 1;
nfsd4_cb(&dp->dl_recall, dp->dl_stid.sc_client,
NFSPROC4_CLNT_CB_RECALL);
nfsd4_run_cb(&dp->dl_recall);
}
/* Called from break_lease() with i_lock held. */

3
fs/nfsd/state.h
View File

@ -543,8 +543,9 @@ void nfsd4_run_cb_recall(struct work_struct *w);
extern void nfsd4_probe_callback(struct nfs4_client *clp);
extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
extern void nfsd4_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
enum nfsd4_cb_op op);
extern void nfsd4_run_cb(struct nfsd4_callback *cb);
extern int nfsd4_create_callback_queue(void);
extern void nfsd4_destroy_callback_queue(void);
extern void nfsd4_shutdown_callback(struct nfs4_client *);