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nfsd4: generic callback code

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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>
This commit is contained in:
J. Bruce Fields 2010-05-16 16:47:08 -04:00 committed by J. Bruce Fields
parent 1c8556026e
commit 5878453dbd
2 changed files with 34 additions and 40 deletions
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72
fs/nfsd/nfs4callback.c
View File

@ -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;
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);
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);
if (cb->cb_ops->rpc_release)
cb->cb_ops->rpc_release(cb);
}
void nfsd4_do_callback_rpc(struct work_struct *w)
{
/* 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);
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;
_nfsd4_cb_recall(dp);
if (clnt == NULL) {
nfsd4_release_cb(cb);
return; /* Client is shutting down; give up. */
}
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT, cb->cb_ops, cb);
}
void nfsd4_cb_recall(struct nfs4_delegation *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;
queue_work(callback_wq, &dp->dl_recall.cb_work);
}

2
fs/nfsd/state.h
View File

@ -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;
};