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(server->client_acl)) 34 goto out_noacl; 35 36 nfs_sysfs_link_rpc_client(server, 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(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(server) && !IS_ERR(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 struct nfs_client *mds_clp = mds_srv->nfs_client; 90 struct nfs_client_initdata cl_init = { 91 .addr = ds_addr, 92 .addrlen = ds_addrlen, 93 .nodename = mds_clp->cl_rpcclient->cl_nodename, 94 .ip_addr = mds_clp->cl_ipaddr, 95 .nfs_mod = &nfs_v3, 96 .proto = ds_proto, 97 .net = mds_clp->cl_net, 98 .timeparms = &ds_timeout, 99 .cred = mds_srv->cred, 100 .xprtsec = mds_clp->cl_xprtsec, 101 }; 102 struct nfs_client *clp; 103 char buf[INET6_ADDRSTRLEN + 1]; 104 105 /* fake a hostname because lockd wants it */ 106 if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0) 107 return ERR_PTR(-EINVAL); 108 cl_init.hostname = buf; 109 110 switch (ds_proto) { 111 case XPRT_TRANSPORT_TCP: 112 case XPRT_TRANSPORT_TCP_TLS: 113 if (mds_clp->cl_nconnect > 1) 114 cl_init.nconnect = mds_clp->cl_nconnect; 115 } 116 117 if (mds_srv->flags & NFS_MOUNT_NORESVPORT) 118 __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); 119 120 __set_bit(NFS_CS_DS, &cl_init.init_flags); 121 122 /* Use the MDS nfs_client cl_ipaddr. */ 123 nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); 124 clp = nfs_get_client(&cl_init); 125 126 return clp; 127 } 128 EXPORT_SYMBOL_GPL(nfs3_set_ds_client); 129