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