summaryrefslogtreecommitdiffstats
path: root/fs/nfs/nfs3client.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfs/nfs3client.c')
-rw-r--r--fs/nfs/nfs3client.c119
1 files changed, 119 insertions, 0 deletions
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
new file mode 100644
index 000000000..669cda757
--- /dev/null
+++ b/fs/nfs/nfs3client.c
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <linux/nfs_fs.h>
+#include <linux/nfs_mount.h>
+#include <linux/sunrpc/addr.h>
+#include "internal.h"
+#include "nfs3_fs.h"
+
+#ifdef CONFIG_NFS_V3_ACL
+static struct rpc_stat nfsacl_rpcstat = { &nfsacl_program };
+static const struct rpc_version *nfsacl_version[] = {
+ [3] = &nfsacl_version3,
+};
+
+const struct rpc_program nfsacl_program = {
+ .name = "nfsacl",
+ .number = NFS_ACL_PROGRAM,
+ .nrvers = ARRAY_SIZE(nfsacl_version),
+ .version = nfsacl_version,
+ .stats = &nfsacl_rpcstat,
+};
+
+/*
+ * Initialise an NFSv3 ACL client connection
+ */
+static void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ if (server->flags & NFS_MOUNT_NOACL)
+ goto out_noacl;
+
+ server->client_acl = rpc_bind_new_program(server->client, &nfsacl_program, 3);
+ if (IS_ERR(server->client_acl))
+ goto out_noacl;
+
+ /* No errors! Assume that Sun nfsacls are supported */
+ server->caps |= NFS_CAP_ACLS;
+ return;
+
+out_noacl:
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#else
+static inline void nfs_init_server_aclclient(struct nfs_server *server)
+{
+ server->flags &= ~NFS_MOUNT_NOACL;
+ server->caps &= ~NFS_CAP_ACLS;
+}
+#endif
+
+struct nfs_server *nfs3_create_server(struct fs_context *fc)
+{
+ struct nfs_server *server = nfs_create_server(fc);
+
+ /* Create a client RPC handle for the NFS v3 ACL management interface */
+ if (!IS_ERR(server))
+ nfs_init_server_aclclient(server);
+ return server;
+}
+
+struct nfs_server *nfs3_clone_server(struct nfs_server *source,
+ struct nfs_fh *fh,
+ struct nfs_fattr *fattr,
+ rpc_authflavor_t flavor)
+{
+ struct nfs_server *server = nfs_clone_server(source, fh, fattr, flavor);
+ if (!IS_ERR(server) && !IS_ERR(source->client_acl))
+ nfs_init_server_aclclient(server);
+ return server;
+}
+
+/*
+ * Set up a pNFS Data Server client over NFSv3.
+ *
+ * Return any existing nfs_client that matches server address,port,version
+ * and minorversion.
+ *
+ * For a new nfs_client, use a soft mount (default), a low retrans and a
+ * low timeout interval so that if a connection is lost, we retry through
+ * the MDS.
+ */
+struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
+ const struct sockaddr_storage *ds_addr, int ds_addrlen,
+ int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans)
+{
+ struct rpc_timeout ds_timeout;
+ struct nfs_client *mds_clp = mds_srv->nfs_client;
+ struct nfs_client_initdata cl_init = {
+ .addr = ds_addr,
+ .addrlen = ds_addrlen,
+ .nodename = mds_clp->cl_rpcclient->cl_nodename,
+ .ip_addr = mds_clp->cl_ipaddr,
+ .nfs_mod = &nfs_v3,
+ .proto = ds_proto,
+ .net = mds_clp->cl_net,
+ .timeparms = &ds_timeout,
+ .cred = mds_srv->cred,
+ };
+ struct nfs_client *clp;
+ char buf[INET6_ADDRSTRLEN + 1];
+
+ /* fake a hostname because lockd wants it */
+ if (rpc_ntop((struct sockaddr *)ds_addr, buf, sizeof(buf)) <= 0)
+ return ERR_PTR(-EINVAL);
+ cl_init.hostname = buf;
+
+ if (mds_clp->cl_nconnect > 1 && ds_proto == XPRT_TRANSPORT_TCP)
+ cl_init.nconnect = mds_clp->cl_nconnect;
+
+ if (mds_srv->flags & NFS_MOUNT_NORESVPORT)
+ __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
+
+ __set_bit(NFS_CS_DS, &cl_init.init_flags);
+
+ /* Use the MDS nfs_client cl_ipaddr. */
+ nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans);
+ clp = nfs_get_client(&cl_init);
+
+ return clp;
+}
+EXPORT_SYMBOL_GPL(nfs3_set_ds_client);