}
static int
-encode_cb_recall(struct xdr_stream *xdr, struct nfs4_cb_recall *cb_rec)
+encode_cb_recall(struct xdr_stream *xdr, struct nfs4_delegation *dp)
{
__be32 *p;
- int len = cb_rec->cbr_fhlen;
+ int len = dp->dl_fh.fh_size;
- RESERVE_SPACE(12+sizeof(cb_rec->cbr_stateid) + len);
+ RESERVE_SPACE(12+sizeof(dp->dl_stateid) + len);
WRITE32(OP_CB_RECALL);
- WRITE32(cb_rec->cbr_stateid.si_generation);
- WRITEMEM(&cb_rec->cbr_stateid.si_opaque, sizeof(stateid_opaque_t));
- WRITE32(cb_rec->cbr_trunc);
+ WRITE32(dp->dl_stateid.si_generation);
+ WRITEMEM(&dp->dl_stateid.si_opaque, sizeof(stateid_opaque_t));
+ WRITE32(0); /* truncate optimization not implemented */
WRITE32(len);
- WRITEMEM(cb_rec->cbr_fhval, len);
+ WRITEMEM(&dp->dl_fh.fh_base, len);
return 0;
}
}
static int
-nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_cb_recall *args)
+nfs4_xdr_enc_cb_recall(struct rpc_rqst *req, __be32 *p, struct nfs4_delegation *args)
{
struct xdr_stream xdr;
struct nfs4_cb_compound_hdr hdr = {
- .ident = args->cbr_ident,
+ .ident = args->dl_ident,
.nops = 1,
};
.pipe_dir_name = "/nfsd4_cb",
};
+static int max_cb_time(void)
+{
+ return max(NFSD_LEASE_TIME/10, (time_t)1) * HZ;
+}
+
/* Reference counting, callback cleanup, etc., all look racy as heck.
* And why is cb_set an atomic? */
-static int do_probe_callback(void *data)
+int setup_callback_client(struct nfs4_client *clp)
{
- struct nfs4_client *clp = data;
struct sockaddr_in addr;
- struct nfs4_callback *cb = &clp->cl_callback;
+ struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
struct rpc_timeout timeparms = {
- .to_initval = (NFSD_LEASE_TIME/4) * HZ,
- .to_retries = 5,
- .to_maxval = (NFSD_LEASE_TIME/2) * HZ,
- .to_exponential = 1,
+ .to_initval = max_cb_time(),
+ .to_retries = 0,
};
struct rpc_create_args args = {
.protocol = IPPROTO_TCP,
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
.client_name = clp->cl_principal,
};
- struct rpc_message msg = {
- .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
- .rpc_argp = clp,
- };
struct rpc_clnt *client;
- int status;
- if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5)) {
- status = nfserr_cb_path_down;
- goto out_err;
- }
+ if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
+ return -EINVAL;
/* Initialize address */
memset(&addr, 0, sizeof(addr));
/* Create RPC client */
client = rpc_create(&args);
if (IS_ERR(client)) {
- dprintk("NFSD: couldn't create callback client\n");
- status = PTR_ERR(client);
- goto out_err;
+ dprintk("NFSD: couldn't create callback client: %ld\n",
+ PTR_ERR(client));
+ return PTR_ERR(client);
}
+ cb->cb_client = client;
+ return 0;
- status = rpc_call_sync(client, &msg, RPC_TASK_SOFT);
+}
- if (status)
- goto out_release_client;
+static void warn_no_callback_path(struct nfs4_client *clp, int reason)
+{
+ dprintk("NFSD: warning: no callback path to client %.*s: error %d\n",
+ (int)clp->cl_name.len, clp->cl_name.data, reason);
+}
- cb->cb_client = client;
- atomic_set(&cb->cb_set, 1);
- put_nfs4_client(clp);
- return 0;
-out_release_client:
- rpc_shutdown_client(client);
-out_err:
- dprintk("NFSD: warning: no callback path to client %.*s\n",
- (int)clp->cl_name.len, clp->cl_name.data);
+static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
+{
+ struct nfs4_client *clp = calldata;
+
+ if (task->tk_status)
+ warn_no_callback_path(clp, task->tk_status);
+ else
+ atomic_set(&clp->cl_cb_conn.cb_set, 1);
put_nfs4_client(clp);
- return status;
+}
+
+static const struct rpc_call_ops nfsd4_cb_probe_ops = {
+ .rpc_call_done = nfsd4_cb_probe_done,
+};
+
+static struct rpc_cred *lookup_cb_cred(struct nfs4_cb_conn *cb)
+{
+ struct auth_cred acred = {
+ .machine_cred = 1
+ };
+
+ /*
+ * Note in the gss case this doesn't actually have to wait for a
+ * gss upcall (or any calls to the client); this just creates a
+ * non-uptodate cred which the rpc state machine will fill in with
+ * a refresh_upcall later.
+ */
+ return rpcauth_lookup_credcache(cb->cb_client->cl_auth, &acred,
+ RPCAUTH_LOOKUP_NEW);
+}
+
+void do_probe_callback(struct nfs4_client *clp)
+{
+ struct nfs4_cb_conn *cb = &clp->cl_cb_conn;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
+ .rpc_argp = clp,
+ };
+ struct rpc_cred *cred;
+ int status;
+
+ cred = lookup_cb_cred(cb);
+ if (IS_ERR(cred)) {
+ status = PTR_ERR(cred);
+ goto out;
+ }
+ cb->cb_cred = cred;
+ msg.rpc_cred = cb->cb_cred;
+ status = rpc_call_async(cb->cb_client, &msg, RPC_TASK_SOFT,
+ &nfsd4_cb_probe_ops, (void *)clp);
+out:
+ if (status) {
+ warn_no_callback_path(clp, status);
+ put_nfs4_client(clp);
+ }
}
/*
void
nfsd4_probe_callback(struct nfs4_client *clp)
{
- struct task_struct *t;
+ int status;
- BUG_ON(atomic_read(&clp->cl_callback.cb_set));
+ BUG_ON(atomic_read(&clp->cl_cb_conn.cb_set));
+
+ status = setup_callback_client(clp);
+ if (status) {
+ warn_no_callback_path(clp, status);
+ return;
+ }
/* the task holds a reference to the nfs4_client struct */
atomic_inc(&clp->cl_count);
- t = kthread_run(do_probe_callback, clp, "nfs4_cb_probe");
-
- if (IS_ERR(t))
- atomic_dec(&clp->cl_count);
-
- return;
+ do_probe_callback(clp);
}
/*
* called with dp->dl_count inc'ed.
- * nfs4_lock_state() may or may not have been called.
*/
void
nfsd4_cb_recall(struct nfs4_delegation *dp)
{
struct nfs4_client *clp = dp->dl_client;
- struct rpc_clnt *clnt = clp->cl_callback.cb_client;
- struct nfs4_cb_recall *cbr = &dp->dl_recall;
+ struct rpc_clnt *clnt = clp->cl_cb_conn.cb_client;
struct rpc_message msg = {
.rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_RECALL],
- .rpc_argp = cbr,
+ .rpc_argp = dp,
+ .rpc_cred = clp->cl_cb_conn.cb_cred
};
int retries = 1;
int status = 0;
- cbr->cbr_trunc = 0; /* XXX need to implement truncate optimization */
- cbr->cbr_dp = dp;
-
status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
while (retries--) {
switch (status) {
case -EIO:
/* Network partition? */
- atomic_set(&clp->cl_callback.cb_set, 0);
+ atomic_set(&clp->cl_cb_conn.cb_set, 0);
case -EBADHANDLE:
case -NFS4ERR_BAD_STATEID:
/* Race: client probably got cb_recall
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff