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Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r--fs/nfsd/nfs4callback.c144
1 files changed, 39 insertions, 105 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index e0be57b0f79b..ed2b1151b171 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -49,12 +49,6 @@ static void nfsd4_mark_cb_fault(struct nfs4_client *, int reason);
/* Index of predefined Linux callback client operations */
-enum {
- NFSPROC4_CLNT_CB_NULL = 0,
- NFSPROC4_CLNT_CB_RECALL,
- NFSPROC4_CLNT_CB_SEQUENCE,
-};
-
struct nfs4_cb_compound_hdr {
/* args */
u32 ident; /* minorversion 0 only */
@@ -494,7 +488,7 @@ static void nfs4_xdr_enc_cb_null(struct rpc_rqst *req, struct xdr_stream *xdr,
static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr,
const struct nfsd4_callback *cb)
{
- const struct nfs4_delegation *args = cb->cb_op;
+ const struct nfs4_delegation *dp = cb_to_delegation(cb);
struct nfs4_cb_compound_hdr hdr = {
.ident = cb->cb_clp->cl_cb_ident,
.minorversion = cb->cb_minorversion,
@@ -502,7 +496,7 @@ static void nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, struct xdr_stream *xdr,
encode_cb_compound4args(xdr, &hdr);
encode_cb_sequence4args(xdr, cb, &hdr);
- encode_cb_recall4args(xdr, args, &hdr);
+ encode_cb_recall4args(xdr, dp, &hdr);
encode_cb_nops(&hdr);
}
@@ -746,27 +740,6 @@ static const struct rpc_call_ops nfsd4_cb_probe_ops = {
static struct workqueue_struct *callback_wq;
-static void run_nfsd4_cb(struct nfsd4_callback *cb)
-{
- queue_work(callback_wq, &cb->cb_work);
-}
-
-static void do_probe_callback(struct nfs4_client *clp)
-{
- struct nfsd4_callback *cb = &clp->cl_cb_null;
-
- cb->cb_op = NULL;
- cb->cb_clp = clp;
-
- cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL];
- cb->cb_msg.rpc_argp = NULL;
- cb->cb_msg.rpc_resp = NULL;
-
- cb->cb_ops = &nfsd4_cb_probe_ops;
-
- run_nfsd4_cb(cb);
-}
-
/*
* Poke the callback thread to process any updates to the callback
* parameters, and send a null probe.
@@ -775,7 +748,7 @@ 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)
@@ -847,23 +820,9 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
rpc_wake_up_next(&clp->cl_cb_waitq);
dprintk("%s: freed slot, new seqid=%d\n", __func__,
clp->cl_cb_session->se_cb_seq_nr);
-
- /* We're done looking into the sequence information */
- task->tk_msg.rpc_resp = NULL;
}
-}
-
-
-static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
-{
- struct nfsd4_callback *cb = calldata;
- struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
- struct nfs4_client *clp = cb->cb_clp;
- struct rpc_clnt *current_rpc_client = clp->cl_cb_client;
-
- nfsd4_cb_done(task, calldata);
- if (current_rpc_client != task->tk_client) {
+ if (clp->cl_cb_client != task->tk_client) {
/* We're shutting down or changing cl_cb_client; leave
* it to nfsd4_process_cb_update to restart the call if
* necessary. */
@@ -872,47 +831,42 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
if (cb->cb_done)
return;
- switch (task->tk_status) {
+
+ switch (cb->cb_ops->done(cb, task)) {
case 0:
- cb->cb_done = true;
+ task->tk_status = 0;
+ rpc_restart_call_prepare(task);
return;
- case -EBADHANDLE:
- case -NFS4ERR_BAD_STATEID:
- /* Race: client probably got cb_recall
- * before open reply granting delegation */
+ case 1:
break;
- default:
+ case -1:
/* Network partition? */
nfsd4_mark_cb_down(clp, task->tk_status);
+ break;
+ default:
+ BUG();
}
- if (dp->dl_retries--) {
- rpc_delay(task, 2*HZ);
- task->tk_status = 0;
- rpc_restart_call_prepare(task);
- return;
- }
- nfsd4_mark_cb_down(clp, task->tk_status);
cb->cb_done = true;
}
-static void nfsd4_cb_recall_release(void *calldata)
+static void nfsd4_cb_release(void *calldata)
{
struct nfsd4_callback *cb = calldata;
struct nfs4_client *clp = cb->cb_clp;
- struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
if (cb->cb_done) {
spin_lock(&clp->cl_lock);
list_del(&cb->cb_per_client);
spin_unlock(&clp->cl_lock);
- nfs4_put_stid(&dp->dl_stid);
+
+ cb->cb_ops->release(cb);
}
}
-static const struct rpc_call_ops nfsd4_cb_recall_ops = {
+static const struct rpc_call_ops nfsd4_cb_ops = {
.rpc_call_prepare = nfsd4_cb_prepare,
- .rpc_call_done = nfsd4_cb_recall_done,
- .rpc_release = nfsd4_cb_recall_release,
+ .rpc_call_done = nfsd4_cb_done,
+ .rpc_release = nfsd4_cb_release,
};
int nfsd4_create_callback_queue(void)
@@ -937,16 +891,10 @@ 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);
}
-static void nfsd4_release_cb(struct nfsd4_callback *cb)
-{
- if (cb->cb_ops->rpc_release)
- cb->cb_ops->rpc_release(cb);
-}
-
/* requires cl_lock: */
static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)
{
@@ -1009,63 +957,49 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
}
/* Yay, the callback channel's back! Restart any callbacks: */
list_for_each_entry(cb, &clp->cl_callbacks, cb_per_client)
- run_nfsd4_cb(cb);
+ queue_work(callback_wq, &cb->cb_work);
}
static void
-nfsd4_run_callback_rpc(struct nfsd4_callback *cb)
+nfsd4_run_cb_work(struct work_struct *work)
{
+ struct nfsd4_callback *cb =
+ container_of(work, struct nfsd4_callback, cb_work);
struct nfs4_client *clp = cb->cb_clp;
struct rpc_clnt *clnt;
+ if (cb->cb_ops && cb->cb_ops->prepare)
+ cb->cb_ops->prepare(cb);
+
if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
clnt = clp->cl_cb_client;
if (!clnt) {
/* Callback channel broken, or client killed; give up: */
- nfsd4_release_cb(cb);
+ if (cb->cb_ops && cb->cb_ops->release)
+ cb->cb_ops->release(cb);
return;
}
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
- cb->cb_ops, cb);
+ cb->cb_ops ? &nfsd4_cb_ops : &nfsd4_cb_probe_ops, cb);
}
-void
-nfsd4_run_cb_null(struct work_struct *w)
+void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
+ struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op)
{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
- nfsd4_run_callback_rpc(cb);
-}
-
-void
-nfsd4_run_cb_recall(struct work_struct *w)
-{
- struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback,
- cb_work);
-
- nfsd4_prepare_cb_recall(cb->cb_op);
- nfsd4_run_callback_rpc(cb);
-}
-
-void nfsd4_cb_recall(struct nfs4_delegation *dp)
-{
- struct nfsd4_callback *cb = &dp->dl_recall;
- struct nfs4_client *clp = dp->dl_stid.sc_client;
-
- dp->dl_retries = 1;
- cb->cb_op = dp;
cb->cb_clp = clp;
- cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL];
+ cb->cb_msg.rpc_proc = &nfs4_cb_procedures[op];
cb->cb_msg.rpc_argp = cb;
cb->cb_msg.rpc_resp = cb;
-
- cb->cb_ops = &nfsd4_cb_recall_ops;
-
+ cb->cb_ops = ops;
+ INIT_WORK(&cb->cb_work, nfsd4_run_cb_work);
INIT_LIST_HEAD(&cb->cb_per_client);
cb->cb_done = true;
+}
- run_nfsd4_cb(&dp->dl_recall);
+void nfsd4_run_cb(struct nfsd4_callback *cb)
+{
+ queue_work(callback_wq, &cb->cb_work);
}