1#include <linux/nfs_fs.h>
2#include <linux/nfs_mount.h>
3#include <linux/sunrpc/addr.h>
4#include "internal.h"
5#include "nfs3_fs.h"
6
7#ifdef CONFIG_NFS_V3_ACL
8static struct rpc_stat		nfsacl_rpcstat = { &nfsacl_program };
9static const struct rpc_version *nfsacl_version[] = {
10	[3]			= &nfsacl_version3,
11};
12
13const struct rpc_program nfsacl_program = {
14	.name			= "nfsacl",
15	.number			= NFS_ACL_PROGRAM,
16	.nrvers			= ARRAY_SIZE(nfsacl_version),
17	.version		= nfsacl_version,
18	.stats			= &nfsacl_rpcstat,
19};
20
21/*
22 * Initialise an NFSv3 ACL client connection
23 */
24static void nfs_init_server_aclclient(struct nfs_server *server)
25{
26	if (server->flags & NFS_MOUNT_NOACL)
27		goto out_noacl;
28
29	server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
30	if (IS_ERR(server->client_acl))
31		goto out_noacl;
32
33	/* No errors! Assume that Sun nfsacls are supported */
34	server->caps |= NFS_CAP_ACLS;
35	return;
36
37out_noacl:
38	server->caps &= ~NFS_CAP_ACLS;
39}
40#else
41static inline void nfs_init_server_aclclient(struct nfs_server *server)
42{
43	server->flags &= ~NFS_MOUNT_NOACL;
44	server->caps &= ~NFS_CAP_ACLS;
45}
46#endif
47
48struct nfs_server *nfs3_create_server(struct nfs_mount_info *mount_info,
49				      struct nfs_subversion *nfs_mod)
50{
51	struct nfs_server *server = nfs_create_server(mount_info, nfs_mod);
52	/* Create a client RPC handle for the NFS v3 ACL management interface */
53	if (!IS_ERR(server))
54		nfs_init_server_aclclient(server);
55	return server;
56}
57
58struct nfs_server *nfs3_clone_server(struct nfs_server *source,
59				     struct nfs_fh *fh,
60				     struct nfs_fattr *fattr,
61				     rpc_authflavor_t flavor)
62{
63	struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor);
64	if (!IS_ERR(server) && !IS_ERR(source->client_acl))
65		nfs_init_server_aclclient(server);
66	return server;
67}
68
69/*
70 * Set up a pNFS Data Server client over NFSv3.
71 *
72 * Return any existing nfs_client that matches server address,port,version
73 * and minorversion.
74 *
75 * For a new nfs_client, use a soft mount (default), a low retrans and a
76 * low timeout interval so that if a connection is lost, we retry through
77 * the MDS.
78 */
79struct nfs_client *nfs3_set_ds_client(struct nfs_client *mds_clp,
80		const struct sockaddr *ds_addr, int ds_addrlen,
81		int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans,
82		rpc_authflavor_t au_flavor)
83{
84	struct nfs_client_initdata cl_init = {
85		.addr = ds_addr,
86		.addrlen = ds_addrlen,
87		.nfs_mod = &nfs_v3,
88		.proto = ds_proto,
89		.net = mds_clp->cl_net,
90	};
91	struct rpc_timeout ds_timeout;
92	struct nfs_client *clp;
93	char buf[INET6_ADDRSTRLEN + 1];
94
95	/* fake a hostname because lockd wants it */
96	if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0)
97		return ERR_PTR(-EINVAL);
98	cl_init.hostname = buf;
99
100	/* Use the MDS nfs_client cl_ipaddr. */
101	nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
102	clp = nfs_get_client(&cl_init, &ds_timeout, mds_clp->cl_ipaddr,
103			     au_flavor);
104
105	return clp;
106}
107EXPORT_SYMBOL_GPL(nfs3_set_ds_client);
108