} while (0)
#define RESERVE_SPACE(nbytes) do { \
p = xdr_reserve_space(xdr, nbytes); \
- if (!p) dprintk("NFSD: RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __FUNCTION__); \
+ if (!p) dprintk("NFSD: RESERVE_SPACE(%d) failed in function %s\n", (int) (nbytes), __func__); \
BUG_ON(!p); \
} while (0)
p = xdr_inline_decode(xdr, nbytes); \
if (!p) { \
dprintk("NFSD: %s: reply buffer overflowed in line %d.\n", \
- __FUNCTION__, __LINE__); \
+ __func__, __LINE__); \
return -EIO; \
} \
} while (0)
&nfs_cb_version4,
};
-/*
- * Use the SETCLIENTID credential
- */
-static struct rpc_cred *
-nfsd4_lookupcred(struct nfs4_client *clp, int taskflags)
-{
- struct auth_cred acred;
- struct rpc_clnt *clnt = clp->cl_callback.cb_client;
- struct rpc_cred *ret;
-
- get_group_info(clp->cl_cred.cr_group_info);
- acred.uid = clp->cl_cred.cr_uid;
- acred.gid = clp->cl_cred.cr_gid;
- acred.group_info = clp->cl_cred.cr_group_info;
-
- dprintk("NFSD: looking up %s cred\n",
- clnt->cl_auth->au_ops->au_name);
- ret = rpcauth_lookup_credcache(clnt->cl_auth, &acred, taskflags);
- put_group_info(clp->cl_cred.cr_group_info);
- return ret;
-}
+static struct rpc_program cb_program;
+
+static struct rpc_stat cb_stats = {
+ .program = &cb_program
+};
+
+#define NFS4_CALLBACK 0x40000000
+static struct rpc_program cb_program = {
+ .name = "nfs4_cb",
+ .number = NFS4_CALLBACK,
+ .nrvers = ARRAY_SIZE(nfs_cb_version),
+ .version = nfs_cb_version,
+ .stats = &cb_stats,
+};
/* Reference counting, callback cleanup, etc., all look racy as heck.
* And why is cb_set an atomic? */
static int do_probe_callback(void *data)
{
struct nfs4_client *clp = data;
- struct nfs4_callback *cb = &clp->cl_callback;
- struct rpc_message msg = {
- .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
- .rpc_argp = clp,
- };
- int status;
-
- msg.rpc_cred = nfsd4_lookupcred(clp, 0);
- if (IS_ERR(msg.rpc_cred))
- goto out;
- status = rpc_call_sync(cb->cb_client, &msg, RPC_TASK_SOFT);
- put_rpccred(msg.rpc_cred);
-
- if (status) {
- rpc_shutdown_client(cb->cb_client);
- cb->cb_client = NULL;
- } else
- atomic_set(&cb->cb_set, 1);
-out:
- put_nfs4_client(clp);
- return 0;
-}
-
-/*
- * Set up the callback client and put a NFSPROC4_CB_NULL on the wire...
- */
-void
-nfsd4_probe_callback(struct nfs4_client *clp)
-{
struct sockaddr_in addr;
struct nfs4_callback *cb = &clp->cl_callback;
struct rpc_timeout timeparms = {
.to_maxval = (NFSD_LEASE_TIME/2) * HZ,
.to_exponential = 1,
};
- struct rpc_program * program = &cb->cb_program;
struct rpc_create_args args = {
.protocol = IPPROTO_TCP,
.address = (struct sockaddr *)&addr,
.addrsize = sizeof(addr),
.timeout = &timeparms,
- .program = program,
+ .program = &cb_program,
.version = nfs_cb_version[1]->number,
- .authflavor = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */
+ .authflavor = RPC_AUTH_UNIX, /* XXX: need AUTH_GSS... */
.flags = (RPC_CLNT_CREATE_NOPING),
};
- struct task_struct *t;
-
- if (atomic_read(&cb->cb_set))
- return;
+ struct rpc_message msg = {
+ .rpc_proc = &nfs4_cb_procedures[NFSPROC4_CLNT_CB_NULL],
+ .rpc_argp = clp,
+ };
+ struct rpc_clnt *client;
+ int status;
/* Initialize address */
memset(&addr, 0, sizeof(addr));
addr.sin_port = htons(cb->cb_port);
addr.sin_addr.s_addr = htonl(cb->cb_addr);
- /* Initialize rpc_program */
- program->name = "nfs4_cb";
- program->number = cb->cb_prog;
- program->nrvers = ARRAY_SIZE(nfs_cb_version);
- program->version = nfs_cb_version;
- program->stats = &cb->cb_stat;
-
/* Initialize rpc_stat */
- memset(program->stats, 0, sizeof(cb->cb_stat));
- program->stats->program = program;
+ memset(args.program->stats, 0, sizeof(struct rpc_stat));
/* Create RPC client */
- cb->cb_client = rpc_create(&args);
- if (IS_ERR(cb->cb_client)) {
+ client = rpc_create(&args);
+ if (IS_ERR(client)) {
dprintk("NFSD: couldn't create callback client\n");
+ status = PTR_ERR(client);
goto out_err;
}
+ status = rpc_call_sync(client, &msg, RPC_TASK_SOFT);
+
+ if (status)
+ goto out_release_client;
+
+ 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:
+ put_nfs4_client(clp);
+ dprintk("NFSD: warning: no callback path to client %.*s\n",
+ (int)clp->cl_name.len, clp->cl_name.data);
+ return status;
+}
+
+/*
+ * Set up the callback client and put a NFSPROC4_CB_NULL on the wire...
+ */
+void
+nfsd4_probe_callback(struct nfs4_client *clp)
+{
+ struct task_struct *t;
+
+ BUG_ON(atomic_read(&clp->cl_callback.cb_set));
+
/* 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))
- goto out_release_clp;
+ atomic_dec(&clp->cl_count);
return;
-
-out_release_clp:
- atomic_dec(&clp->cl_count);
- rpc_shutdown_client(cb->cb_client);
-out_err:
- cb->cb_client = NULL;
- dprintk("NFSD: warning: no callback path to client %.*s\n",
- (int)clp->cl_name.len, clp->cl_name.data);
}
/*
int retries = 1;
int status = 0;
- if ((!atomic_read(&clp->cl_callback.cb_set)) || !clnt)
- return;
-
- msg.rpc_cred = nfsd4_lookupcred(clp, 0);
- if (IS_ERR(msg.rpc_cred))
- goto out;
-
cbr->cbr_trunc = 0; /* XXX need to implement truncate optimization */
cbr->cbr_dp = dp;
switch (status) {
case -EIO:
/* Network partition? */
+ atomic_set(&clp->cl_callback.cb_set, 0);
case -EBADHANDLE:
case -NFS4ERR_BAD_STATEID:
/* Race: client probably got cb_recall
status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
}
out_put_cred:
- put_rpccred(msg.rpc_cred);
-out:
- if (status == -EIO)
- atomic_set(&clp->cl_callback.cb_set, 0);
- /* Success or failure, now we're either waiting for lease expiration
- * or deleg_return. */
- dprintk("NFSD: nfs4_cb_recall: dp %p dl_flock %p dl_count %d\n",dp, dp->dl_flock, atomic_read(&dp->dl_count));
+ /*
+ * Success or failure, now we're either waiting for lease expiration
+ * or deleg_return.
+ */
+ put_nfs4_client(clp);
nfs4_put_delegation(dp);
return;
}