1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun #include <linux/nfs_fs.h>
3*4882a593Smuzhiyun #include <linux/nfs_mount.h>
4*4882a593Smuzhiyun #include <linux/sunrpc/addr.h>
5*4882a593Smuzhiyun #include "internal.h"
6*4882a593Smuzhiyun #include "nfs3_fs.h"
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifdef CONFIG_NFS_V3_ACL
9*4882a593Smuzhiyun static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
10*4882a593Smuzhiyun static const struct rpc_version *nfsacl_version[] = {
11*4882a593Smuzhiyun [3] = &nfsacl_version3,
12*4882a593Smuzhiyun };
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun const struct rpc_program nfsacl_program = {
15*4882a593Smuzhiyun .name = "nfsacl",
16*4882a593Smuzhiyun .number = NFS_ACL_PROGRAM,
17*4882a593Smuzhiyun .nrvers = ARRAY_SIZE(nfsacl_version),
18*4882a593Smuzhiyun .version = nfsacl_version,
19*4882a593Smuzhiyun .stats = &nfsacl_rpcstat,
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun /*
23*4882a593Smuzhiyun * Initialise an NFSv3 ACL client connection
24*4882a593Smuzhiyun */
nfs_init_server_aclclient(struct nfs_server * server)25*4882a593Smuzhiyun static void nfs_init_server_aclclient(struct nfs_server *server)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun if (server->flags & NFS_MOUNT_NOACL)
28*4882a593Smuzhiyun goto out_noacl;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
31*4882a593Smuzhiyun if (IS_ERR(server->client_acl))
32*4882a593Smuzhiyun goto out_noacl;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun /* No errors! Assume that Sun nfsacls are supported */
35*4882a593Smuzhiyun server->caps |= NFS_CAP_ACLS;
36*4882a593Smuzhiyun return;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun out_noacl:
39*4882a593Smuzhiyun server->caps &= ~NFS_CAP_ACLS;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun #else
nfs_init_server_aclclient(struct nfs_server * server)42*4882a593Smuzhiyun static inline void nfs_init_server_aclclient(struct nfs_server *server)
43*4882a593Smuzhiyun {
44*4882a593Smuzhiyun server->flags &= ~NFS_MOUNT_NOACL;
45*4882a593Smuzhiyun server->caps &= ~NFS_CAP_ACLS;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun #endif
48*4882a593Smuzhiyun
nfs3_create_server(struct fs_context * fc)49*4882a593Smuzhiyun struct nfs_server *nfs3_create_server(struct fs_context *fc)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun struct nfs_server *server = nfs_create_server(fc);
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun /* Create a client RPC handle for the NFS v3 ACL management interface */
54*4882a593Smuzhiyun if (!IS_ERR(server))
55*4882a593Smuzhiyun nfs_init_server_aclclient(server);
56*4882a593Smuzhiyun return server;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
nfs3_clone_server(struct nfs_server * source,struct nfs_fh * fh,struct nfs_fattr * fattr,rpc_authflavor_t flavor)59*4882a593Smuzhiyun struct nfs_server *nfs3_clone_server(struct nfs_server *source,
60*4882a593Smuzhiyun struct nfs_fh *fh,
61*4882a593Smuzhiyun struct nfs_fattr *fattr,
62*4882a593Smuzhiyun rpc_authflavor_t flavor)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor);
65*4882a593Smuzhiyun if (!IS_ERR(server) && !IS_ERR(source->client_acl))
66*4882a593Smuzhiyun nfs_init_server_aclclient(server);
67*4882a593Smuzhiyun return server;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /*
71*4882a593Smuzhiyun * Set up a pNFS Data Server client over NFSv3.
72*4882a593Smuzhiyun *
73*4882a593Smuzhiyun * Return any existing nfs_client that matches server address,port,version
74*4882a593Smuzhiyun * and minorversion.
75*4882a593Smuzhiyun *
76*4882a593Smuzhiyun * For a new nfs_client, use a soft mount (default), a low retrans and a
77*4882a593Smuzhiyun * low timeout interval so that if a connection is lost, we retry through
78*4882a593Smuzhiyun * the MDS.
79*4882a593Smuzhiyun */
nfs3_set_ds_client(struct nfs_server * mds_srv,const struct sockaddr * ds_addr,int ds_addrlen,int ds_proto,unsigned int ds_timeo,unsigned int ds_retrans)80*4882a593Smuzhiyun struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
81*4882a593Smuzhiyun const struct sockaddr *ds_addr, int ds_addrlen,
82*4882a593Smuzhiyun int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun struct rpc_timeout ds_timeout;
85*4882a593Smuzhiyun struct nfs_client *mds_clp = mds_srv->nfs_client;
86*4882a593Smuzhiyun struct nfs_client_initdata cl_init = {
87*4882a593Smuzhiyun .addr = ds_addr,
88*4882a593Smuzhiyun .addrlen = ds_addrlen,
89*4882a593Smuzhiyun .nodename = mds_clp->cl_rpcclient->cl_nodename,
90*4882a593Smuzhiyun .ip_addr = mds_clp->cl_ipaddr,
91*4882a593Smuzhiyun .nfs_mod = &nfs_v3,
92*4882a593Smuzhiyun .proto = ds_proto,
93*4882a593Smuzhiyun .net = mds_clp->cl_net,
94*4882a593Smuzhiyun .timeparms = &ds_timeout,
95*4882a593Smuzhiyun .cred = mds_srv->cred,
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun struct nfs_client *clp;
98*4882a593Smuzhiyun char buf[INET6_ADDRSTRLEN + 1];
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun /* fake a hostname because lockd wants it */
101*4882a593Smuzhiyun if (rpc_ntop(ds_addr, buf, sizeof(buf)) <= 0)
102*4882a593Smuzhiyun return ERR_PTR(-EINVAL);
103*4882a593Smuzhiyun cl_init.hostname = buf;
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP)
106*4882a593Smuzhiyun cl_init.nconnect = mds_clp->cl_nconnect;
107*4882a593Smuzhiyun
108*4882a593Smuzhiyun if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
109*4882a593Smuzhiyun __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun __set_bit(NFS_CS_DS, &cl_init.init_flags);
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun /* Use the MDS nfs_client cl_ipaddr. */
114*4882a593Smuzhiyun nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
115*4882a593Smuzhiyun clp = nfs_get_client(&cl_init);
116*4882a593Smuzhiyun
117*4882a593Smuzhiyun return clp;
118*4882a593Smuzhiyun }
119*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(nfs3_set_ds_client);
120