| 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 | 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(-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(&ds_timeout, ds_proto, ds_timeo, ds_retrans); |
| 127 | clp = nfs_get_client(&cl_init); |
| 128 | |
| 129 | return clp; |
| 130 | } |
| 131 | EXPORT_SYMBOL_GPL(nfs3_set_ds_client); |