1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | #include <linux/nfs_fs.h> |
3 | #include <linux/nfs_mount.h> |
4 | #include <linux/sunrpc/addr.h> |
5 | #include "internal.h" |
6 | #include "nfs3_fs.h" |
7 | #include "netns.h" |
8 | #include "sysfs.h" |
9 | |
10 | #ifdef CONFIG_NFS_V3_ACL |
11 | static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program }; |
12 | static const struct rpc_version *nfsacl_version[] = { |
13 | [3] = &nfsacl_version3, |
14 | }; |
15 | |
16 | const struct rpc_program nfsacl_program = { |
17 | .name = "nfsacl" , |
18 | .number = NFS_ACL_PROGRAM, |
19 | .nrvers = ARRAY_SIZE(nfsacl_version), |
20 | .version = nfsacl_version, |
21 | .stats = &nfsacl_rpcstat, |
22 | }; |
23 | |
24 | /* |
25 | * Initialise an NFSv3 ACL client connection |
26 | */ |
27 | static void nfs_init_server_aclclient(struct nfs_server *server) |
28 | { |
29 | if (server->flags & NFS_MOUNT_NOACL) |
30 | goto out_noacl; |
31 | |
32 | server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3); |
33 | if (IS_ERR(ptr: server->client_acl)) |
34 | goto out_noacl; |
35 | |
36 | nfs_sysfs_link_rpc_client(server, clnt: server->client_acl, NULL); |
37 | |
38 | /* No errors! Assume that Sun nfsacls are supported */ |
39 | server->caps |= NFS_CAP_ACLS; |
40 | return; |
41 | |
42 | out_noacl: |
43 | server->caps &= ~NFS_CAP_ACLS; |
44 | } |
45 | #else |
46 | static inline void nfs_init_server_aclclient(struct nfs_server *server) |
47 | { |
48 | server->flags &= ~NFS_MOUNT_NOACL; |
49 | server->caps &= ~NFS_CAP_ACLS; |
50 | } |
51 | #endif |
52 | |
53 | struct nfs_server *nfs3_create_server(struct fs_context *fc) |
54 | { |
55 | struct nfs_server *server = nfs_create_server(fc); |
56 | |
57 | /* Create a client RPC handle for the NFS v3 ACL management interface */ |
58 | if (!IS_ERR(ptr: server)) |
59 | nfs_init_server_aclclient(server); |
60 | return server; |
61 | } |
62 | |
63 | struct nfs_server *nfs3_clone_server(struct nfs_server *source, |
64 | struct nfs_fh *fh, |
65 | struct nfs_fattr *fattr, |
66 | rpc_authflavor_t flavor) |
67 | { |
68 | struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor); |
69 | if (!IS_ERR(ptr: server) && !IS_ERR(ptr: source->client_acl)) |
70 | nfs_init_server_aclclient(server); |
71 | return server; |
72 | } |
73 | |
74 | /* |
75 | * Set up a pNFS Data Server client over NFSv3. |
76 | * |
77 | * Return any existing nfs_client that matches server address,port,version |
78 | * and minorversion. |
79 | * |
80 | * For a new nfs_client, use a soft mount (default), a low retrans and a |
81 | * low timeout interval so that if a connection is lost, we retry through |
82 | * the MDS. |
83 | */ |
84 | struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, |
85 | const struct sockaddr_storage *ds_addr, int ds_addrlen, |
86 | int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans) |
87 | { |
88 | struct rpc_timeout ds_timeout; |
89 | unsigned long connect_timeout = ds_timeo * (ds_retrans + 1) * HZ / 10; |
90 | struct nfs_client *mds_clp = mds_srv->nfs_client; |
91 | struct nfs_client_initdata cl_init = { |
92 | .addr = ds_addr, |
93 | .addrlen = ds_addrlen, |
94 | .nodename = mds_clp->cl_rpcclient->cl_nodename, |
95 | .ip_addr = mds_clp->cl_ipaddr, |
96 | .nfs_mod = &nfs_v3, |
97 | .proto = ds_proto, |
98 | .net = mds_clp->cl_net, |
99 | .timeparms = &ds_timeout, |
100 | .cred = mds_srv->cred, |
101 | .xprtsec = mds_clp->cl_xprtsec, |
102 | .connect_timeout = connect_timeout, |
103 | .reconnect_timeout = connect_timeout, |
104 | }; |
105 | struct nfs_client *clp; |
106 | char buf[INET6_ADDRSTRLEN + 1]; |
107 | |
108 | /* fake a hostname because lockd wants it */ |
109 | if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0) |
110 | return ERR_PTR(error: -EINVAL); |
111 | cl_init.hostname = buf; |
112 | |
113 | switch (ds_proto) { |
114 | case XPRT_TRANSPORT_TCP: |
115 | case XPRT_TRANSPORT_TCP_TLS: |
116 | if (mds_clp->cl_nconnect > 1) |
117 | cl_init.nconnect = mds_clp->cl_nconnect; |
118 | } |
119 | |
120 | if (mds_srv->flags & NFS_MOUNT_NORESVPORT) |
121 | __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
122 | |
123 | __set_bit(NFS_CS_DS, &cl_init.init_flags); |
124 | |
125 | /* Use the MDS nfs_client cl_ipaddr. */ |
126 | nfs_init_timeout_values(to: &ds_timeout, proto: ds_proto, timeo: ds_timeo, retrans: ds_retrans); |
127 | clp = nfs_get_client(&cl_init); |
128 | |
129 | return clp; |
130 | } |
131 | EXPORT_SYMBOL_GPL(nfs3_set_ds_client); |
132 | |