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