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1339 lines
34 KiB
1339 lines
34 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
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* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved. |
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* Written by David Howells ([email protected]) |
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*/ |
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#include <linux/module.h> |
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#include <linux/nfs_fs.h> |
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#include <linux/nfs_mount.h> |
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#include <linux/sunrpc/addr.h> |
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#include <linux/sunrpc/auth.h> |
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#include <linux/sunrpc/xprt.h> |
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#include <linux/sunrpc/bc_xprt.h> |
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#include <linux/sunrpc/rpc_pipe_fs.h> |
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#include "internal.h" |
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#include "callback.h" |
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#include "delegation.h" |
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#include "nfs4session.h" |
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#include "nfs4idmap.h" |
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#include "pnfs.h" |
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#include "netns.h" |
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|
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#define NFSDBG_FACILITY NFSDBG_CLIENT |
|
|
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/* |
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* Get a unique NFSv4.0 callback identifier which will be used |
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* by the V4.0 callback service to lookup the nfs_client struct |
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*/ |
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static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion) |
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{ |
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int ret = 0; |
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struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
|
|
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if (clp->rpc_ops->version != 4 || minorversion != 0) |
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return ret; |
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idr_preload(GFP_KERNEL); |
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spin_lock(&nn->nfs_client_lock); |
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ret = idr_alloc(&nn->cb_ident_idr, clp, 1, 0, GFP_NOWAIT); |
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if (ret >= 0) |
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clp->cl_cb_ident = ret; |
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spin_unlock(&nn->nfs_client_lock); |
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idr_preload_end(); |
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return ret < 0 ? ret : 0; |
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} |
|
|
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#ifdef CONFIG_NFS_V4_1 |
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/* |
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* Per auth flavor data server rpc clients |
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*/ |
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struct nfs4_ds_server { |
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struct list_head list; /* ds_clp->cl_ds_clients */ |
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struct rpc_clnt *rpc_clnt; |
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}; |
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|
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/** |
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* nfs4_find_ds_client - Common lookup case for DS I/O |
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* @ds_clp: pointer to the DS's nfs_client |
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* @flavor: rpc auth flavour to match |
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*/ |
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static struct nfs4_ds_server * |
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nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor) |
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{ |
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struct nfs4_ds_server *dss; |
|
|
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rcu_read_lock(); |
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list_for_each_entry_rcu(dss, &ds_clp->cl_ds_clients, list) { |
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if (dss->rpc_clnt->cl_auth->au_flavor != flavor) |
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continue; |
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goto out; |
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} |
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dss = NULL; |
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out: |
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rcu_read_unlock(); |
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return dss; |
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} |
|
|
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static struct nfs4_ds_server * |
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nfs4_add_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor, |
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struct nfs4_ds_server *new) |
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{ |
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struct nfs4_ds_server *dss; |
|
|
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spin_lock(&ds_clp->cl_lock); |
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list_for_each_entry(dss, &ds_clp->cl_ds_clients, list) { |
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if (dss->rpc_clnt->cl_auth->au_flavor != flavor) |
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continue; |
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goto out; |
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} |
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if (new) |
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list_add_rcu(&new->list, &ds_clp->cl_ds_clients); |
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dss = new; |
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out: |
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spin_unlock(&ds_clp->cl_lock); /* need some lock to protect list */ |
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return dss; |
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} |
|
|
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static struct nfs4_ds_server * |
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nfs4_alloc_ds_server(struct nfs_client *ds_clp, rpc_authflavor_t flavor) |
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{ |
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struct nfs4_ds_server *dss; |
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|
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dss = kmalloc(sizeof(*dss), GFP_NOFS); |
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if (dss == NULL) |
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return ERR_PTR(-ENOMEM); |
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|
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dss->rpc_clnt = rpc_clone_client_set_auth(ds_clp->cl_rpcclient, flavor); |
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if (IS_ERR(dss->rpc_clnt)) { |
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int err = PTR_ERR(dss->rpc_clnt); |
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kfree (dss); |
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return ERR_PTR(err); |
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} |
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INIT_LIST_HEAD(&dss->list); |
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|
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return dss; |
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} |
|
|
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static void |
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nfs4_free_ds_server(struct nfs4_ds_server *dss) |
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{ |
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rpc_release_client(dss->rpc_clnt); |
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kfree(dss); |
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} |
|
|
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/** |
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* nfs4_find_or_create_ds_client - Find or create a DS rpc client |
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* @ds_clp: pointer to the DS's nfs_client |
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* @inode: pointer to the inode |
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* |
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* Find or create a DS rpc client with th MDS server rpc client auth flavor |
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* in the nfs_client cl_ds_clients list. |
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*/ |
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struct rpc_clnt * |
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nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode) |
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{ |
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struct nfs4_ds_server *dss, *new; |
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rpc_authflavor_t flavor = NFS_SERVER(inode)->client->cl_auth->au_flavor; |
|
|
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dss = nfs4_find_ds_client(ds_clp, flavor); |
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if (dss != NULL) |
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goto out; |
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new = nfs4_alloc_ds_server(ds_clp, flavor); |
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if (IS_ERR(new)) |
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return ERR_CAST(new); |
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dss = nfs4_add_ds_client(ds_clp, flavor, new); |
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if (dss != new) |
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nfs4_free_ds_server(new); |
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out: |
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return dss->rpc_clnt; |
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} |
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EXPORT_SYMBOL_GPL(nfs4_find_or_create_ds_client); |
|
|
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static void |
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nfs4_shutdown_ds_clients(struct nfs_client *clp) |
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{ |
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struct nfs4_ds_server *dss; |
|
|
|
while (!list_empty(&clp->cl_ds_clients)) { |
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dss = list_entry(clp->cl_ds_clients.next, |
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struct nfs4_ds_server, list); |
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list_del(&dss->list); |
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rpc_shutdown_client(dss->rpc_clnt); |
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kfree (dss); |
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} |
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} |
|
|
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static void |
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nfs4_cleanup_callback(struct nfs_client *clp) |
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{ |
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struct nfs4_copy_state *cp_state; |
|
|
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while (!list_empty(&clp->pending_cb_stateids)) { |
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cp_state = list_entry(clp->pending_cb_stateids.next, |
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struct nfs4_copy_state, copies); |
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list_del(&cp_state->copies); |
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kfree(cp_state); |
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} |
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} |
|
|
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void nfs41_shutdown_client(struct nfs_client *clp) |
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{ |
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if (nfs4_has_session(clp)) { |
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nfs4_cleanup_callback(clp); |
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nfs4_shutdown_ds_clients(clp); |
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nfs4_destroy_session(clp->cl_session); |
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nfs4_destroy_clientid(clp); |
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} |
|
|
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} |
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#endif /* CONFIG_NFS_V4_1 */ |
|
|
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void nfs40_shutdown_client(struct nfs_client *clp) |
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{ |
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if (clp->cl_slot_tbl) { |
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nfs4_shutdown_slot_table(clp->cl_slot_tbl); |
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kfree(clp->cl_slot_tbl); |
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} |
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} |
|
|
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struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init) |
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{ |
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char buf[INET6_ADDRSTRLEN + 1]; |
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const char *ip_addr = cl_init->ip_addr; |
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struct nfs_client *clp = nfs_alloc_client(cl_init); |
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int err; |
|
|
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if (IS_ERR(clp)) |
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return clp; |
|
|
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err = nfs_get_cb_ident_idr(clp, cl_init->minorversion); |
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if (err) |
|
goto error; |
|
|
|
if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) { |
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err = -EINVAL; |
|
goto error; |
|
} |
|
|
|
spin_lock_init(&clp->cl_lock); |
|
INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state); |
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INIT_LIST_HEAD(&clp->cl_ds_clients); |
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rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client"); |
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clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED; |
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clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion]; |
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clp->cl_mig_gen = 1; |
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#if IS_ENABLED(CONFIG_NFS_V4_1) |
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init_waitqueue_head(&clp->cl_lock_waitq); |
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#endif |
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INIT_LIST_HEAD(&clp->pending_cb_stateids); |
|
|
|
if (cl_init->minorversion != 0) |
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__set_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags); |
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__set_bit(NFS_CS_DISCRTRY, &clp->cl_flags); |
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__set_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags); |
|
|
|
/* |
|
* Set up the connection to the server before we add add to the |
|
* global list. |
|
*/ |
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err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_GSS_KRB5I); |
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if (err == -EINVAL) |
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err = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX); |
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if (err < 0) |
|
goto error; |
|
|
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/* If no clientaddr= option was specified, find a usable cb address */ |
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if (ip_addr == NULL) { |
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struct sockaddr_storage cb_addr; |
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struct sockaddr *sap = (struct sockaddr *)&cb_addr; |
|
|
|
err = rpc_localaddr(clp->cl_rpcclient, sap, sizeof(cb_addr)); |
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if (err < 0) |
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goto error; |
|
err = rpc_ntop(sap, buf, sizeof(buf)); |
|
if (err < 0) |
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goto error; |
|
ip_addr = (const char *)buf; |
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} |
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strlcpy(clp->cl_ipaddr, ip_addr, sizeof(clp->cl_ipaddr)); |
|
|
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err = nfs_idmap_new(clp); |
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if (err < 0) { |
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dprintk("%s: failed to create idmapper. Error = %d\n", |
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__func__, err); |
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goto error; |
|
} |
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__set_bit(NFS_CS_IDMAP, &clp->cl_res_state); |
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return clp; |
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|
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error: |
|
nfs_free_client(clp); |
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return ERR_PTR(err); |
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} |
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|
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/* |
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* Destroy the NFS4 callback service |
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*/ |
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static void nfs4_destroy_callback(struct nfs_client *clp) |
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{ |
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if (__test_and_clear_bit(NFS_CS_CALLBACK, &clp->cl_res_state)) |
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nfs_callback_down(clp->cl_mvops->minor_version, clp->cl_net); |
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} |
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|
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static void nfs4_shutdown_client(struct nfs_client *clp) |
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{ |
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if (__test_and_clear_bit(NFS_CS_RENEWD, &clp->cl_res_state)) |
|
nfs4_kill_renewd(clp); |
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clp->cl_mvops->shutdown_client(clp); |
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nfs4_destroy_callback(clp); |
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if (__test_and_clear_bit(NFS_CS_IDMAP, &clp->cl_res_state)) |
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nfs_idmap_delete(clp); |
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|
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rpc_destroy_wait_queue(&clp->cl_rpcwaitq); |
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kfree(clp->cl_serverowner); |
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kfree(clp->cl_serverscope); |
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kfree(clp->cl_implid); |
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kfree(clp->cl_owner_id); |
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} |
|
|
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void nfs4_free_client(struct nfs_client *clp) |
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{ |
|
nfs4_shutdown_client(clp); |
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nfs_free_client(clp); |
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} |
|
|
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/* |
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* Initialize the NFS4 callback service |
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*/ |
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static int nfs4_init_callback(struct nfs_client *clp) |
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{ |
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struct rpc_xprt *xprt; |
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int error; |
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|
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xprt = rcu_dereference_raw(clp->cl_rpcclient->cl_xprt); |
|
|
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if (nfs4_has_session(clp)) { |
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error = xprt_setup_backchannel(xprt, NFS41_BC_MIN_CALLBACKS); |
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if (error < 0) |
|
return error; |
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} |
|
|
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error = nfs_callback_up(clp->cl_mvops->minor_version, xprt); |
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if (error < 0) { |
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dprintk("%s: failed to start callback. Error = %d\n", |
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__func__, error); |
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return error; |
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} |
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__set_bit(NFS_CS_CALLBACK, &clp->cl_res_state); |
|
|
|
return 0; |
|
} |
|
|
|
/** |
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* nfs40_init_client - nfs_client initialization tasks for NFSv4.0 |
|
* @clp: nfs_client to initialize |
|
* |
|
* Returns zero on success, or a negative errno if some error occurred. |
|
*/ |
|
int nfs40_init_client(struct nfs_client *clp) |
|
{ |
|
struct nfs4_slot_table *tbl; |
|
int ret; |
|
|
|
tbl = kzalloc(sizeof(*tbl), GFP_NOFS); |
|
if (tbl == NULL) |
|
return -ENOMEM; |
|
|
|
ret = nfs4_setup_slot_table(tbl, NFS4_MAX_SLOT_TABLE, |
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"NFSv4.0 transport Slot table"); |
|
if (ret) { |
|
kfree(tbl); |
|
return ret; |
|
} |
|
|
|
clp->cl_slot_tbl = tbl; |
|
return 0; |
|
} |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
|
|
/** |
|
* nfs41_init_client - nfs_client initialization tasks for NFSv4.1+ |
|
* @clp: nfs_client to initialize |
|
* |
|
* Returns zero on success, or a negative errno if some error occurred. |
|
*/ |
|
int nfs41_init_client(struct nfs_client *clp) |
|
{ |
|
struct nfs4_session *session = NULL; |
|
|
|
/* |
|
* Create the session and mark it expired. |
|
* When a SEQUENCE operation encounters the expired session |
|
* it will do session recovery to initialize it. |
|
*/ |
|
session = nfs4_alloc_session(clp); |
|
if (!session) |
|
return -ENOMEM; |
|
|
|
clp->cl_session = session; |
|
|
|
/* |
|
* The create session reply races with the server back |
|
* channel probe. Mark the client NFS_CS_SESSION_INITING |
|
* so that the client back channel can find the |
|
* nfs_client struct |
|
*/ |
|
nfs_mark_client_ready(clp, NFS_CS_SESSION_INITING); |
|
return 0; |
|
} |
|
|
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
/* |
|
* Initialize the minor version specific parts of an NFS4 client record |
|
*/ |
|
static int nfs4_init_client_minor_version(struct nfs_client *clp) |
|
{ |
|
int ret; |
|
|
|
ret = clp->cl_mvops->init_client(clp); |
|
if (ret) |
|
return ret; |
|
return nfs4_init_callback(clp); |
|
} |
|
|
|
/** |
|
* nfs4_init_client - Initialise an NFS4 client record |
|
* |
|
* @clp: nfs_client to initialise |
|
* @cl_init: pointer to nfs_client_initdata |
|
* |
|
* Returns pointer to an NFS client, or an ERR_PTR value. |
|
*/ |
|
struct nfs_client *nfs4_init_client(struct nfs_client *clp, |
|
const struct nfs_client_initdata *cl_init) |
|
{ |
|
struct nfs_client *old; |
|
int error; |
|
|
|
if (clp->cl_cons_state == NFS_CS_READY) |
|
/* the client is initialised already */ |
|
return clp; |
|
|
|
error = nfs4_init_client_minor_version(clp); |
|
if (error < 0) |
|
goto error; |
|
|
|
error = nfs4_discover_server_trunking(clp, &old); |
|
if (error < 0) |
|
goto error; |
|
|
|
if (clp != old) { |
|
clp->cl_preserve_clid = true; |
|
/* |
|
* Mark the client as having failed initialization so other |
|
* processes walking the nfs_client_list in nfs_match_client() |
|
* won't try to use it. |
|
*/ |
|
nfs_mark_client_ready(clp, -EPERM); |
|
} |
|
clear_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags); |
|
nfs_put_client(clp); |
|
return old; |
|
|
|
error: |
|
nfs_mark_client_ready(clp, error); |
|
nfs_put_client(clp); |
|
return ERR_PTR(error); |
|
} |
|
|
|
/* |
|
* SETCLIENTID just did a callback update with the callback ident in |
|
* "drop," but server trunking discovery claims "drop" and "keep" are |
|
* actually the same server. Swap the callback IDs so that "keep" |
|
* will continue to use the callback ident the server now knows about, |
|
* and so that "keep"'s original callback ident is destroyed when |
|
* "drop" is freed. |
|
*/ |
|
static void nfs4_swap_callback_idents(struct nfs_client *keep, |
|
struct nfs_client *drop) |
|
{ |
|
struct nfs_net *nn = net_generic(keep->cl_net, nfs_net_id); |
|
unsigned int save = keep->cl_cb_ident; |
|
|
|
if (keep->cl_cb_ident == drop->cl_cb_ident) |
|
return; |
|
|
|
dprintk("%s: keeping callback ident %u and dropping ident %u\n", |
|
__func__, keep->cl_cb_ident, drop->cl_cb_ident); |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
|
|
idr_replace(&nn->cb_ident_idr, keep, drop->cl_cb_ident); |
|
keep->cl_cb_ident = drop->cl_cb_ident; |
|
|
|
idr_replace(&nn->cb_ident_idr, drop, save); |
|
drop->cl_cb_ident = save; |
|
|
|
spin_unlock(&nn->nfs_client_lock); |
|
} |
|
|
|
static bool nfs4_match_client_owner_id(const struct nfs_client *clp1, |
|
const struct nfs_client *clp2) |
|
{ |
|
if (clp1->cl_owner_id == NULL || clp2->cl_owner_id == NULL) |
|
return true; |
|
return strcmp(clp1->cl_owner_id, clp2->cl_owner_id) == 0; |
|
} |
|
|
|
static bool nfs4_same_verifier(nfs4_verifier *v1, nfs4_verifier *v2) |
|
{ |
|
return memcmp(v1->data, v2->data, sizeof(v1->data)) == 0; |
|
} |
|
|
|
static int nfs4_match_client(struct nfs_client *pos, struct nfs_client *new, |
|
struct nfs_client **prev, struct nfs_net *nn) |
|
{ |
|
int status; |
|
|
|
if (pos->rpc_ops != new->rpc_ops) |
|
return 1; |
|
|
|
if (pos->cl_minorversion != new->cl_minorversion) |
|
return 1; |
|
|
|
/* If "pos" isn't marked ready, we can't trust the |
|
* remaining fields in "pos", especially the client |
|
* ID and serverowner fields. Wait for CREATE_SESSION |
|
* to finish. */ |
|
if (pos->cl_cons_state > NFS_CS_READY) { |
|
refcount_inc(&pos->cl_count); |
|
spin_unlock(&nn->nfs_client_lock); |
|
|
|
nfs_put_client(*prev); |
|
*prev = pos; |
|
|
|
status = nfs_wait_client_init_complete(pos); |
|
spin_lock(&nn->nfs_client_lock); |
|
|
|
if (status < 0) |
|
return status; |
|
} |
|
|
|
if (pos->cl_cons_state != NFS_CS_READY) |
|
return 1; |
|
|
|
if (pos->cl_clientid != new->cl_clientid) |
|
return 1; |
|
|
|
/* NFSv4.1 always uses the uniform string, however someone |
|
* might switch the uniquifier string on us. |
|
*/ |
|
if (!nfs4_match_client_owner_id(pos, new)) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* nfs40_walk_client_list - Find server that recognizes a client ID |
|
* |
|
* @new: nfs_client with client ID to test |
|
* @result: OUT: found nfs_client, or new |
|
* @cred: credential to use for trunking test |
|
* |
|
* Returns zero, a negative errno, or a negative NFS4ERR status. |
|
* If zero is returned, an nfs_client pointer is planted in "result." |
|
* |
|
* NB: nfs40_walk_client_list() relies on the new nfs_client being |
|
* the last nfs_client on the list. |
|
*/ |
|
int nfs40_walk_client_list(struct nfs_client *new, |
|
struct nfs_client **result, |
|
const struct cred *cred) |
|
{ |
|
struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); |
|
struct nfs_client *pos, *prev = NULL; |
|
struct nfs4_setclientid_res clid = { |
|
.clientid = new->cl_clientid, |
|
.confirm = new->cl_confirm, |
|
}; |
|
int status = -NFS4ERR_STALE_CLIENTID; |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
|
|
|
if (pos == new) |
|
goto found; |
|
|
|
status = nfs4_match_client(pos, new, &prev, nn); |
|
if (status < 0) |
|
goto out_unlock; |
|
if (status != 0) |
|
continue; |
|
/* |
|
* We just sent a new SETCLIENTID, which should have |
|
* caused the server to return a new cl_confirm. So if |
|
* cl_confirm is the same, then this is a different |
|
* server that just returned the same cl_confirm by |
|
* coincidence: |
|
*/ |
|
if ((new != pos) && nfs4_same_verifier(&pos->cl_confirm, |
|
&new->cl_confirm)) |
|
continue; |
|
/* |
|
* But if the cl_confirm's are different, then the only |
|
* way that a SETCLIENTID_CONFIRM to pos can succeed is |
|
* if new and pos point to the same server: |
|
*/ |
|
found: |
|
refcount_inc(&pos->cl_count); |
|
spin_unlock(&nn->nfs_client_lock); |
|
|
|
nfs_put_client(prev); |
|
prev = pos; |
|
|
|
status = nfs4_proc_setclientid_confirm(pos, &clid, cred); |
|
switch (status) { |
|
case -NFS4ERR_STALE_CLIENTID: |
|
break; |
|
case 0: |
|
nfs4_swap_callback_idents(pos, new); |
|
pos->cl_confirm = new->cl_confirm; |
|
nfs_mark_client_ready(pos, NFS_CS_READY); |
|
|
|
prev = NULL; |
|
*result = pos; |
|
goto out; |
|
case -ERESTARTSYS: |
|
case -ETIMEDOUT: |
|
/* The callback path may have been inadvertently |
|
* changed. Schedule recovery! |
|
*/ |
|
nfs4_schedule_path_down_recovery(pos); |
|
goto out; |
|
default: |
|
goto out; |
|
} |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
} |
|
out_unlock: |
|
spin_unlock(&nn->nfs_client_lock); |
|
|
|
/* No match found. The server lost our clientid */ |
|
out: |
|
nfs_put_client(prev); |
|
return status; |
|
} |
|
|
|
#ifdef CONFIG_NFS_V4_1 |
|
/* |
|
* Returns true if the server major ids match |
|
*/ |
|
bool |
|
nfs4_check_serverowner_major_id(struct nfs41_server_owner *o1, |
|
struct nfs41_server_owner *o2) |
|
{ |
|
if (o1->major_id_sz != o2->major_id_sz) |
|
return false; |
|
return memcmp(o1->major_id, o2->major_id, o1->major_id_sz) == 0; |
|
} |
|
|
|
/* |
|
* Returns true if the server scopes match |
|
*/ |
|
static bool |
|
nfs4_check_server_scope(struct nfs41_server_scope *s1, |
|
struct nfs41_server_scope *s2) |
|
{ |
|
if (s1->server_scope_sz != s2->server_scope_sz) |
|
return false; |
|
return memcmp(s1->server_scope, s2->server_scope, |
|
s1->server_scope_sz) == 0; |
|
} |
|
|
|
/** |
|
* nfs4_detect_session_trunking - Checks for session trunking. |
|
* @clp: original mount nfs_client |
|
* @res: result structure from an exchange_id using the original mount |
|
* nfs_client with a new multi_addr transport |
|
* @xprt: pointer to the transport to add. |
|
* |
|
* Called after a successful EXCHANGE_ID on a multi-addr connection. |
|
* Upon success, add the transport. |
|
* |
|
* Returns zero on success, otherwise -EINVAL |
|
* |
|
* Note: since the exchange_id for the new multi_addr transport uses the |
|
* same nfs_client from the original mount, the cl_owner_id is reused, |
|
* so eir_clientowner is the same. |
|
*/ |
|
int nfs4_detect_session_trunking(struct nfs_client *clp, |
|
struct nfs41_exchange_id_res *res, |
|
struct rpc_xprt *xprt) |
|
{ |
|
/* Check eir_clientid */ |
|
if (clp->cl_clientid != res->clientid) |
|
goto out_err; |
|
|
|
/* Check eir_server_owner so_major_id */ |
|
if (!nfs4_check_serverowner_major_id(clp->cl_serverowner, |
|
res->server_owner)) |
|
goto out_err; |
|
|
|
/* Check eir_server_owner so_minor_id */ |
|
if (clp->cl_serverowner->minor_id != res->server_owner->minor_id) |
|
goto out_err; |
|
|
|
/* Check eir_server_scope */ |
|
if (!nfs4_check_server_scope(clp->cl_serverscope, res->server_scope)) |
|
goto out_err; |
|
|
|
pr_info("NFS: %s: Session trunking succeeded for %s\n", |
|
clp->cl_hostname, |
|
xprt->address_strings[RPC_DISPLAY_ADDR]); |
|
|
|
return 0; |
|
out_err: |
|
pr_info("NFS: %s: Session trunking failed for %s\n", clp->cl_hostname, |
|
xprt->address_strings[RPC_DISPLAY_ADDR]); |
|
|
|
return -EINVAL; |
|
} |
|
|
|
/** |
|
* nfs41_walk_client_list - Find nfs_client that matches a client/server owner |
|
* |
|
* @new: nfs_client with client ID to test |
|
* @result: OUT: found nfs_client, or new |
|
* @cred: credential to use for trunking test |
|
* |
|
* Returns zero, a negative errno, or a negative NFS4ERR status. |
|
* If zero is returned, an nfs_client pointer is planted in "result." |
|
* |
|
* NB: nfs41_walk_client_list() relies on the new nfs_client being |
|
* the last nfs_client on the list. |
|
*/ |
|
int nfs41_walk_client_list(struct nfs_client *new, |
|
struct nfs_client **result, |
|
const struct cred *cred) |
|
{ |
|
struct nfs_net *nn = net_generic(new->cl_net, nfs_net_id); |
|
struct nfs_client *pos, *prev = NULL; |
|
int status = -NFS4ERR_STALE_CLIENTID; |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
list_for_each_entry(pos, &nn->nfs_client_list, cl_share_link) { |
|
|
|
if (pos == new) |
|
goto found; |
|
|
|
status = nfs4_match_client(pos, new, &prev, nn); |
|
if (status < 0) |
|
goto out; |
|
if (status != 0) |
|
continue; |
|
|
|
/* |
|
* Note that session trunking is just a special subcase of |
|
* client id trunking. In either case, we want to fall back |
|
* to using the existing nfs_client. |
|
*/ |
|
if (!nfs4_check_serverowner_major_id(pos->cl_serverowner, |
|
new->cl_serverowner)) |
|
continue; |
|
|
|
found: |
|
refcount_inc(&pos->cl_count); |
|
*result = pos; |
|
status = 0; |
|
break; |
|
} |
|
|
|
out: |
|
spin_unlock(&nn->nfs_client_lock); |
|
nfs_put_client(prev); |
|
return status; |
|
} |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
static void nfs4_destroy_server(struct nfs_server *server) |
|
{ |
|
LIST_HEAD(freeme); |
|
|
|
nfs_server_return_all_delegations(server); |
|
unset_pnfs_layoutdriver(server); |
|
nfs4_purge_state_owners(server, &freeme); |
|
nfs4_free_state_owners(&freeme); |
|
} |
|
|
|
/* |
|
* NFSv4.0 callback thread helper |
|
* |
|
* Find a client by callback identifier |
|
*/ |
|
struct nfs_client * |
|
nfs4_find_client_ident(struct net *net, int cb_ident) |
|
{ |
|
struct nfs_client *clp; |
|
struct nfs_net *nn = net_generic(net, nfs_net_id); |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
clp = idr_find(&nn->cb_ident_idr, cb_ident); |
|
if (clp) |
|
refcount_inc(&clp->cl_count); |
|
spin_unlock(&nn->nfs_client_lock); |
|
return clp; |
|
} |
|
|
|
#if defined(CONFIG_NFS_V4_1) |
|
/* Common match routine for v4.0 and v4.1 callback services */ |
|
static bool nfs4_cb_match_client(const struct sockaddr *addr, |
|
struct nfs_client *clp, u32 minorversion) |
|
{ |
|
struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr; |
|
|
|
/* Don't match clients that failed to initialise */ |
|
if (!(clp->cl_cons_state == NFS_CS_READY || |
|
clp->cl_cons_state == NFS_CS_SESSION_INITING)) |
|
return false; |
|
|
|
smp_rmb(); |
|
|
|
/* Match the version and minorversion */ |
|
if (clp->rpc_ops->version != 4 || |
|
clp->cl_minorversion != minorversion) |
|
return false; |
|
|
|
/* Match only the IP address, not the port number */ |
|
return rpc_cmp_addr(addr, clap); |
|
} |
|
|
|
/* |
|
* NFSv4.1 callback thread helper |
|
* For CB_COMPOUND calls, find a client by IP address, protocol version, |
|
* minorversion, and sessionID |
|
* |
|
* Returns NULL if no such client |
|
*/ |
|
struct nfs_client * |
|
nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, |
|
struct nfs4_sessionid *sid, u32 minorversion) |
|
{ |
|
struct nfs_client *clp; |
|
struct nfs_net *nn = net_generic(net, nfs_net_id); |
|
|
|
spin_lock(&nn->nfs_client_lock); |
|
list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) { |
|
if (!nfs4_cb_match_client(addr, clp, minorversion)) |
|
continue; |
|
|
|
if (!nfs4_has_session(clp)) |
|
continue; |
|
|
|
/* Match sessionid*/ |
|
if (memcmp(clp->cl_session->sess_id.data, |
|
sid->data, NFS4_MAX_SESSIONID_LEN) != 0) |
|
continue; |
|
|
|
refcount_inc(&clp->cl_count); |
|
spin_unlock(&nn->nfs_client_lock); |
|
return clp; |
|
} |
|
spin_unlock(&nn->nfs_client_lock); |
|
return NULL; |
|
} |
|
|
|
#else /* CONFIG_NFS_V4_1 */ |
|
|
|
struct nfs_client * |
|
nfs4_find_client_sessionid(struct net *net, const struct sockaddr *addr, |
|
struct nfs4_sessionid *sid, u32 minorversion) |
|
{ |
|
return NULL; |
|
} |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
|
|
/* |
|
* Set up an NFS4 client |
|
*/ |
|
static int nfs4_set_client(struct nfs_server *server, |
|
const char *hostname, |
|
const struct sockaddr *addr, |
|
const size_t addrlen, |
|
const char *ip_addr, |
|
int proto, const struct rpc_timeout *timeparms, |
|
u32 minorversion, unsigned int nconnect, |
|
struct net *net) |
|
{ |
|
struct nfs_client_initdata cl_init = { |
|
.hostname = hostname, |
|
.addr = addr, |
|
.addrlen = addrlen, |
|
.ip_addr = ip_addr, |
|
.nfs_mod = &nfs_v4, |
|
.proto = proto, |
|
.minorversion = minorversion, |
|
.net = net, |
|
.timeparms = timeparms, |
|
.cred = server->cred, |
|
}; |
|
struct nfs_client *clp; |
|
|
|
if (minorversion == 0) |
|
__set_bit(NFS_CS_REUSEPORT, &cl_init.init_flags); |
|
if (proto == XPRT_TRANSPORT_TCP) |
|
cl_init.nconnect = nconnect; |
|
|
|
if (server->flags & NFS_MOUNT_NORESVPORT) |
|
__set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); |
|
if (server->options & NFS_OPTION_MIGRATION) |
|
__set_bit(NFS_CS_MIGRATION, &cl_init.init_flags); |
|
if (test_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status)) |
|
__set_bit(NFS_CS_TSM_POSSIBLE, &cl_init.init_flags); |
|
server->port = rpc_get_port(addr); |
|
|
|
/* Allocate or find a client reference we can use */ |
|
clp = nfs_get_client(&cl_init); |
|
if (IS_ERR(clp)) |
|
return PTR_ERR(clp); |
|
|
|
if (server->nfs_client == clp) { |
|
nfs_put_client(clp); |
|
return -ELOOP; |
|
} |
|
|
|
/* |
|
* Query for the lease time on clientid setup or renewal |
|
* |
|
* Note that this will be set on nfs_clients that were created |
|
* only for the DS role and did not set this bit, but now will |
|
* serve a dual role. |
|
*/ |
|
set_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state); |
|
|
|
server->nfs_client = clp; |
|
return 0; |
|
} |
|
|
|
/* |
|
* Set up a pNFS Data Server client. |
|
* |
|
* 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 *nfs4_set_ds_client(struct nfs_server *mds_srv, |
|
const struct sockaddr *ds_addr, int ds_addrlen, |
|
int ds_proto, unsigned int ds_timeo, unsigned int ds_retrans, |
|
u32 minor_version) |
|
{ |
|
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_v4, |
|
.proto = ds_proto, |
|
.minorversion = minor_version, |
|
.net = mds_clp->cl_net, |
|
.timeparms = &ds_timeout, |
|
.cred = mds_srv->cred, |
|
}; |
|
char buf[INET6_ADDRSTRLEN + 1]; |
|
|
|
if (rpc_ntop(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 an authflavor equual to the MDS value. Use the MDS nfs_client |
|
* cl_ipaddr so as to use the same EXCHANGE_ID co_ownerid as the MDS |
|
* (section 13.1 RFC 5661). |
|
*/ |
|
nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); |
|
return nfs_get_client(&cl_init); |
|
} |
|
EXPORT_SYMBOL_GPL(nfs4_set_ds_client); |
|
|
|
/* |
|
* Session has been established, and the client marked ready. |
|
* Limit the mount rsize, wsize and dtsize using negotiated fore |
|
* channel attributes. |
|
*/ |
|
static void nfs4_session_limit_rwsize(struct nfs_server *server) |
|
{ |
|
#ifdef CONFIG_NFS_V4_1 |
|
struct nfs4_session *sess; |
|
u32 server_resp_sz; |
|
u32 server_rqst_sz; |
|
|
|
if (!nfs4_has_session(server->nfs_client)) |
|
return; |
|
sess = server->nfs_client->cl_session; |
|
server_resp_sz = sess->fc_attrs.max_resp_sz - nfs41_maxread_overhead; |
|
server_rqst_sz = sess->fc_attrs.max_rqst_sz - nfs41_maxwrite_overhead; |
|
|
|
if (server->dtsize > server_resp_sz) |
|
server->dtsize = server_resp_sz; |
|
if (server->rsize > server_resp_sz) |
|
server->rsize = server_resp_sz; |
|
if (server->wsize > server_rqst_sz) |
|
server->wsize = server_rqst_sz; |
|
#endif /* CONFIG_NFS_V4_1 */ |
|
} |
|
|
|
/* |
|
* Limit xattr sizes using the channel attributes. |
|
*/ |
|
static void nfs4_session_limit_xasize(struct nfs_server *server) |
|
{ |
|
#ifdef CONFIG_NFS_V4_2 |
|
struct nfs4_session *sess; |
|
u32 server_gxa_sz; |
|
u32 server_sxa_sz; |
|
u32 server_lxa_sz; |
|
|
|
if (!nfs4_has_session(server->nfs_client)) |
|
return; |
|
|
|
sess = server->nfs_client->cl_session; |
|
|
|
server_gxa_sz = sess->fc_attrs.max_resp_sz - nfs42_maxgetxattr_overhead; |
|
server_sxa_sz = sess->fc_attrs.max_rqst_sz - nfs42_maxsetxattr_overhead; |
|
server_lxa_sz = sess->fc_attrs.max_resp_sz - |
|
nfs42_maxlistxattrs_overhead; |
|
|
|
if (server->gxasize > server_gxa_sz) |
|
server->gxasize = server_gxa_sz; |
|
if (server->sxasize > server_sxa_sz) |
|
server->sxasize = server_sxa_sz; |
|
if (server->lxasize > server_lxa_sz) |
|
server->lxasize = server_lxa_sz; |
|
#endif |
|
} |
|
|
|
static int nfs4_server_common_setup(struct nfs_server *server, |
|
struct nfs_fh *mntfh, bool auth_probe) |
|
{ |
|
struct nfs_fattr *fattr; |
|
int error; |
|
|
|
/* data servers support only a subset of NFSv4.1 */ |
|
if (is_ds_only_client(server->nfs_client)) |
|
return -EPROTONOSUPPORT; |
|
|
|
fattr = nfs_alloc_fattr(); |
|
if (fattr == NULL) |
|
return -ENOMEM; |
|
|
|
/* We must ensure the session is initialised first */ |
|
error = nfs4_init_session(server->nfs_client); |
|
if (error < 0) |
|
goto out; |
|
|
|
/* Set the basic capabilities */ |
|
server->caps |= server->nfs_client->cl_mvops->init_caps; |
|
if (server->flags & NFS_MOUNT_NORDIRPLUS) |
|
server->caps &= ~NFS_CAP_READDIRPLUS; |
|
if (server->nfs_client->cl_proto == XPRT_TRANSPORT_RDMA) |
|
server->caps &= ~NFS_CAP_READ_PLUS; |
|
/* |
|
* Don't use NFS uid/gid mapping if we're using AUTH_SYS or lower |
|
* authentication. |
|
*/ |
|
if (nfs4_disable_idmapping && |
|
server->client->cl_auth->au_flavor == RPC_AUTH_UNIX) |
|
server->caps |= NFS_CAP_UIDGID_NOMAP; |
|
|
|
|
|
/* Probe the root fh to retrieve its FSID and filehandle */ |
|
error = nfs4_get_rootfh(server, mntfh, auth_probe); |
|
if (error < 0) |
|
goto out; |
|
|
|
dprintk("Server FSID: %llx:%llx\n", |
|
(unsigned long long) server->fsid.major, |
|
(unsigned long long) server->fsid.minor); |
|
nfs_display_fhandle(mntfh, "Pseudo-fs root FH"); |
|
|
|
error = nfs_probe_fsinfo(server, mntfh, fattr); |
|
if (error < 0) |
|
goto out; |
|
|
|
nfs4_session_limit_rwsize(server); |
|
nfs4_session_limit_xasize(server); |
|
|
|
if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN) |
|
server->namelen = NFS4_MAXNAMLEN; |
|
|
|
nfs_server_insert_lists(server); |
|
server->mount_time = jiffies; |
|
server->destroy = nfs4_destroy_server; |
|
out: |
|
nfs_free_fattr(fattr); |
|
return error; |
|
} |
|
|
|
/* |
|
* Create a version 4 volume record |
|
*/ |
|
static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc) |
|
{ |
|
struct nfs_fs_context *ctx = nfs_fc2context(fc); |
|
struct rpc_timeout timeparms; |
|
int error; |
|
|
|
nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol, |
|
ctx->timeo, ctx->retrans); |
|
|
|
/* Initialise the client representation from the mount data */ |
|
server->flags = ctx->flags; |
|
server->options = ctx->options; |
|
server->auth_info = ctx->auth_info; |
|
|
|
/* Use the first specified auth flavor. If this flavor isn't |
|
* allowed by the server, use the SECINFO path to try the |
|
* other specified flavors */ |
|
if (ctx->auth_info.flavor_len >= 1) |
|
ctx->selected_flavor = ctx->auth_info.flavors[0]; |
|
else |
|
ctx->selected_flavor = RPC_AUTH_UNIX; |
|
|
|
/* Get a client record */ |
|
error = nfs4_set_client(server, |
|
ctx->nfs_server.hostname, |
|
&ctx->nfs_server.address, |
|
ctx->nfs_server.addrlen, |
|
ctx->client_address, |
|
ctx->nfs_server.protocol, |
|
&timeparms, |
|
ctx->minorversion, |
|
ctx->nfs_server.nconnect, |
|
fc->net_ns); |
|
if (error < 0) |
|
return error; |
|
|
|
if (ctx->rsize) |
|
server->rsize = nfs_block_size(ctx->rsize, NULL); |
|
if (ctx->wsize) |
|
server->wsize = nfs_block_size(ctx->wsize, NULL); |
|
|
|
server->acregmin = ctx->acregmin * HZ; |
|
server->acregmax = ctx->acregmax * HZ; |
|
server->acdirmin = ctx->acdirmin * HZ; |
|
server->acdirmax = ctx->acdirmax * HZ; |
|
server->port = ctx->nfs_server.port; |
|
|
|
return nfs_init_server_rpcclient(server, &timeparms, |
|
ctx->selected_flavor); |
|
} |
|
|
|
/* |
|
* Create a version 4 volume record |
|
* - keyed on server and FSID |
|
*/ |
|
struct nfs_server *nfs4_create_server(struct fs_context *fc) |
|
{ |
|
struct nfs_fs_context *ctx = nfs_fc2context(fc); |
|
struct nfs_server *server; |
|
bool auth_probe; |
|
int error; |
|
|
|
server = nfs_alloc_server(); |
|
if (!server) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
server->cred = get_cred(fc->cred); |
|
|
|
auth_probe = ctx->auth_info.flavor_len < 1; |
|
|
|
/* set up the general RPC client */ |
|
error = nfs4_init_server(server, fc); |
|
if (error < 0) |
|
goto error; |
|
|
|
error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
|
if (error < 0) |
|
goto error; |
|
|
|
return server; |
|
|
|
error: |
|
nfs_free_server(server); |
|
return ERR_PTR(error); |
|
} |
|
|
|
/* |
|
* Create an NFS4 referral server record |
|
*/ |
|
struct nfs_server *nfs4_create_referral_server(struct fs_context *fc) |
|
{ |
|
struct nfs_fs_context *ctx = nfs_fc2context(fc); |
|
struct nfs_client *parent_client; |
|
struct nfs_server *server, *parent_server; |
|
bool auth_probe; |
|
int error; |
|
|
|
server = nfs_alloc_server(); |
|
if (!server) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
parent_server = NFS_SB(ctx->clone_data.sb); |
|
parent_client = parent_server->nfs_client; |
|
|
|
server->cred = get_cred(parent_server->cred); |
|
|
|
/* Initialise the client representation from the parent server */ |
|
nfs_server_copy_userdata(server, parent_server); |
|
|
|
/* Get a client representation */ |
|
#if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
|
rpc_set_port(&ctx->nfs_server.address, NFS_RDMA_PORT); |
|
error = nfs4_set_client(server, |
|
ctx->nfs_server.hostname, |
|
&ctx->nfs_server.address, |
|
ctx->nfs_server.addrlen, |
|
parent_client->cl_ipaddr, |
|
XPRT_TRANSPORT_RDMA, |
|
parent_server->client->cl_timeout, |
|
parent_client->cl_mvops->minor_version, |
|
parent_client->cl_nconnect, |
|
parent_client->cl_net); |
|
if (!error) |
|
goto init_server; |
|
#endif /* IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) */ |
|
|
|
rpc_set_port(&ctx->nfs_server.address, NFS_PORT); |
|
error = nfs4_set_client(server, |
|
ctx->nfs_server.hostname, |
|
&ctx->nfs_server.address, |
|
ctx->nfs_server.addrlen, |
|
parent_client->cl_ipaddr, |
|
XPRT_TRANSPORT_TCP, |
|
parent_server->client->cl_timeout, |
|
parent_client->cl_mvops->minor_version, |
|
parent_client->cl_nconnect, |
|
parent_client->cl_net); |
|
if (error < 0) |
|
goto error; |
|
|
|
#if IS_ENABLED(CONFIG_SUNRPC_XPRT_RDMA) |
|
init_server: |
|
#endif |
|
error = nfs_init_server_rpcclient(server, parent_server->client->cl_timeout, |
|
ctx->selected_flavor); |
|
if (error < 0) |
|
goto error; |
|
|
|
auth_probe = parent_server->auth_info.flavor_len < 1; |
|
|
|
error = nfs4_server_common_setup(server, ctx->mntfh, auth_probe); |
|
if (error < 0) |
|
goto error; |
|
|
|
return server; |
|
|
|
error: |
|
nfs_free_server(server); |
|
return ERR_PTR(error); |
|
} |
|
|
|
/* |
|
* Grab the destination's particulars, including lease expiry time. |
|
* |
|
* Returns zero if probe succeeded and retrieved FSID matches the FSID |
|
* we have cached. |
|
*/ |
|
static int nfs_probe_destination(struct nfs_server *server) |
|
{ |
|
struct inode *inode = d_inode(server->super->s_root); |
|
struct nfs_fattr *fattr; |
|
int error; |
|
|
|
fattr = nfs_alloc_fattr(); |
|
if (fattr == NULL) |
|
return -ENOMEM; |
|
|
|
/* Sanity: the probe won't work if the destination server |
|
* does not recognize the migrated FH. */ |
|
error = nfs_probe_fsinfo(server, NFS_FH(inode), fattr); |
|
|
|
nfs_free_fattr(fattr); |
|
return error; |
|
} |
|
|
|
/** |
|
* nfs4_update_server - Move an nfs_server to a different nfs_client |
|
* |
|
* @server: represents FSID to be moved |
|
* @hostname: new end-point's hostname |
|
* @sap: new end-point's socket address |
|
* @salen: size of "sap" |
|
* @net: net namespace |
|
* |
|
* The nfs_server must be quiescent before this function is invoked. |
|
* Either its session is drained (NFSv4.1+), or its transport is |
|
* plugged and drained (NFSv4.0). |
|
* |
|
* Returns zero on success, or a negative errno value. |
|
*/ |
|
int nfs4_update_server(struct nfs_server *server, const char *hostname, |
|
struct sockaddr *sap, size_t salen, struct net *net) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
struct rpc_clnt *clnt = server->client; |
|
struct xprt_create xargs = { |
|
.ident = clp->cl_proto, |
|
.net = net, |
|
.dstaddr = sap, |
|
.addrlen = salen, |
|
.servername = hostname, |
|
}; |
|
char buf[INET6_ADDRSTRLEN + 1]; |
|
struct sockaddr_storage address; |
|
struct sockaddr *localaddr = (struct sockaddr *)&address; |
|
int error; |
|
|
|
error = rpc_switch_client_transport(clnt, &xargs, clnt->cl_timeout); |
|
if (error != 0) |
|
return error; |
|
|
|
error = rpc_localaddr(clnt, localaddr, sizeof(address)); |
|
if (error != 0) |
|
return error; |
|
|
|
if (rpc_ntop(localaddr, buf, sizeof(buf)) == 0) |
|
return -EAFNOSUPPORT; |
|
|
|
nfs_server_remove_lists(server); |
|
set_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
|
error = nfs4_set_client(server, hostname, sap, salen, buf, |
|
clp->cl_proto, clnt->cl_timeout, |
|
clp->cl_minorversion, |
|
clp->cl_nconnect, net); |
|
clear_bit(NFS_MIG_TSM_POSSIBLE, &server->mig_status); |
|
if (error != 0) { |
|
nfs_server_insert_lists(server); |
|
return error; |
|
} |
|
nfs_put_client(clp); |
|
|
|
if (server->nfs_client->cl_hostname == NULL) |
|
server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL); |
|
nfs_server_insert_lists(server); |
|
|
|
return nfs_probe_destination(server); |
|
}
|
|
|