From 5878453dbde627a8e1b5a4693087e36cb88d45b1 Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@citi.umich.edu>
Date: Sun, 16 May 2010 16:47:08 -0400
Subject: nfsd4: generic callback code
Make the recall callback code more generic, so that other callbacks
will be able to use it too.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
---
fs/nfsd/nfs4callback.c | 70 ++++++++++++++++++++++----------------------------
fs/nfsd/state.h | 2 ++
2 files changed, 33 insertions(+), 39 deletions(-)
(limited to 'fs/nfsd')
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 5508e928fd9..a037f26252e 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -585,7 +585,6 @@ void nfsd4_probe_callback(struct nfs4_client *clp, struct nfs4_cb_conn *conn)
static int nfsd41_cb_setup_sequence(struct nfs4_client *clp,
struct rpc_task *task)
{
- struct nfsd4_cb_args *args = task->tk_msg.rpc_argp;
u32 *ptr = (u32 *)clp->cl_sessionid.data;
int status = 0;
@@ -598,14 +597,6 @@ static int nfsd41_cb_setup_sequence(struct nfs4_client *clp,
status = -EAGAIN;
goto out;
}
-
- /*
- * We'll need the clp during XDR encoding and decoding,
- * and the sequence during decoding to verify the reply
- */
- args->args_clp = clp;
- task->tk_msg.rpc_resp = args;
-
out:
dprintk("%s status=%d\n", __func__, status);
return status;
@@ -617,7 +608,8 @@ out:
*/
static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata)
{
- struct nfs4_delegation *dp = calldata;
+ struct nfsd4_callback *cb = calldata;
+ struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
struct nfs4_client *clp = dp->dl_client;
struct nfsd4_cb_args *args = task->tk_msg.rpc_argp;
u32 minorversion = clp->cl_cb_conn.cb_minorversion;
@@ -640,7 +632,8 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata)
static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
{
- struct nfs4_delegation *dp = calldata;
+ struct nfsd4_callback *cb = calldata;
+ struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
struct nfs4_client *clp = dp->dl_client;
dprintk("%s: minorversion=%d\n", __func__,
@@ -662,7 +655,8 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
{
- struct nfs4_delegation *dp = calldata;
+ struct nfsd4_callback *cb = calldata;
+ struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
struct nfs4_client *clp = dp->dl_client;
struct rpc_clnt *current_rpc_client = clp->cl_cb_client;
@@ -707,7 +701,8 @@ static void nfsd4_cb_recall_done(struct rpc_task *task, void *calldata)
static void nfsd4_cb_recall_release(void *calldata)
{
- struct nfs4_delegation *dp = calldata;
+ struct nfsd4_callback *cb = calldata;
+ struct nfs4_delegation *dp = container_of(cb, struct nfs4_delegation, dl_recall);
nfs4_put_delegation(dp);
}
@@ -749,42 +744,39 @@ void nfsd4_set_callback_client(struct nfs4_client *clp, struct rpc_clnt *new)
rpc_shutdown_client(old);
}
-/*
- * called with dp->dl_count inc'ed.
- */
-static void _nfsd4_cb_recall(struct nfs4_delegation *dp)
+void nfsd4_release_cb(struct nfsd4_callback *cb)
{
- struct nfs4_client *clp = dp->dl_client;
+ if (cb->cb_ops->rpc_release)
+ cb->cb_ops->rpc_release(cb);
+}
+
+void nfsd4_do_callback_rpc(struct work_struct *w)
+{
+ struct nfsd4_callback *cb = container_of(w, struct nfsd4_callback, cb_work);
+ struct nfs4_client *clp = cb->cb_args.args_clp;
struct rpc_clnt *clnt = clp->cl_cb_client;
- struct nfsd4_cb_args *args = &dp->dl_recall.cb_args;
- struct rpc_message msg = {
- .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],
- .rpc_cred = callback_cred
- };
if (clnt == NULL) {
- nfs4_put_delegation(dp);
+ nfsd4_release_cb(cb);
return; /* Client is shutting down; give up. */
}
-
- args->args_op = dp;
- msg.rpc_argp = args;
- dp->dl_retries = 1;
- rpc_call_async(clnt, &msg, RPC_TASK_SOFT, &nfsd4_cb_recall_ops, dp);
+ rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT, cb->cb_ops, cb);
}
-void nfsd4_do_callback_rpc(struct work_struct *w)
+void nfsd4_cb_recall(struct nfs4_delegation *dp)
{
- /* XXX: for now, just send off delegation recall. */
- /* In future, generalize to handle any sort of callback. */
- struct nfsd4_callback *c = container_of(w, struct nfsd4_callback, cb_work);
- struct nfs4_delegation *dp = container_of(c, struct nfs4_delegation, dl_recall);
-
- _nfsd4_cb_recall(dp);
-}
+ struct nfsd4_callback *cb = &dp->dl_recall;
+ dp->dl_retries = 1;
+ cb->cb_args.args_op = dp;
+ cb->cb_args.args_clp = dp->dl_client;
+ cb->cb_msg.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL];
+ cb->cb_msg.rpc_argp = &cb->cb_args;
+ cb->cb_msg.rpc_resp = &cb->cb_args;
+ cb->cb_msg.rpc_cred = callback_cred;
+
+ cb->cb_ops = &nfsd4_cb_recall_ops;
+ dp->dl_retries = 1;
-void nfsd4_cb_recall(struct nfs4_delegation *dp)
-{
queue_work(callback_wq, &dp->dl_recall.cb_work);
}
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index f988b90ec21..6e592148ad8 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -72,6 +72,8 @@ struct nfsd4_cb_args {
struct nfsd4_callback {
struct nfsd4_cb_args cb_args;
+ struct rpc_message cb_msg;
+ const struct rpc_call_ops *cb_ops;
struct work_struct cb_work;
};
--
cgit v1.2.3-18-g5258