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![Sargun Dhillon](/assets/img/avatar_default.png)
There was refactoring done to use the fs_context for mounting done in:62a55d088c
: NFS: Additional refactoring for fs_context conversion This made it so that the net_ns is fetched from the fs_context (the netns that fsopen is called in). This change also makes it so that the credential fetched during fsopen is used as well as the net_ns. NFS has already had a number of changes to prepare it for user namespaces:1a58e8a0e5
: NFS: Store the credential of the mount process in the nfs_server264d948ce7
: NFS: Convert NFSv3 to use the container user namespacec207db2f5d
: NFS: Convert NFSv2 to use the container user namespace Previously, different credentials could be used for creation of the fs_context versus creation of the nfs_server, as FSCONFIG_CMD_CREATE did the actual credential check, and that's where current_creds() were fetched. This meant that the user namespace which fsopen was called in could be a non-init user namespace. This still requires that the user that calls FSCONFIG_CMD_CREATE has CAP_SYS_ADMIN in the init user ns. This roughly allows a privileged user to mount on behalf of an unprivileged usernamespace, by forking off and calling fsopen in the unprivileged user namespace. It can then pass back that fsfd to the privileged process which can configure the NFS mount, and then it can call FSCONFIG_CMD_CREATE before switching back into the mount namespace of the container, and finish up the mounting process and call fsmount and move_mount. Signed-off-by: Sargun Dhillon <sargun@sargun.me> Tested-by: Alban Crequy <alban.crequy@gmail.com> Fixes:62a55d088c
("NFS: Additional refactoring for fs_context conversion") Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
1358 lines
34 KiB
C
1358 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* client.c: NFS client sharing and management code
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*
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* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/sched.h>
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#include <linux/time.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/string.h>
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#include <linux/stat.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/sunrpc/addr.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/sunrpc/metrics.h>
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#include <linux/sunrpc/xprtsock.h>
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#include <linux/sunrpc/xprtrdma.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/nfs4_mount.h>
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#include <linux/lockd/bind.h>
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#include <linux/seq_file.h>
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#include <linux/mount.h>
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#include <linux/vfs.h>
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#include <linux/inet.h>
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#include <linux/in6.h>
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#include <linux/slab.h>
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#include <linux/idr.h>
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#include <net/ipv6.h>
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#include <linux/nfs_xdr.h>
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#include <linux/sunrpc/bc_xprt.h>
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#include <linux/nsproxy.h>
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#include <linux/pid_namespace.h>
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#include "nfs4_fs.h"
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#include "callback.h"
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#include "delegation.h"
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#include "iostat.h"
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#include "internal.h"
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#include "fscache.h"
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#include "pnfs.h"
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#include "nfs.h"
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#include "netns.h"
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#include "sysfs.h"
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#include "nfs42.h"
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#define NFSDBG_FACILITY NFSDBG_CLIENT
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static DECLARE_WAIT_QUEUE_HEAD(nfs_client_active_wq);
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static DEFINE_SPINLOCK(nfs_version_lock);
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static DEFINE_MUTEX(nfs_version_mutex);
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static LIST_HEAD(nfs_versions);
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/*
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* RPC cruft for NFS
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*/
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static const struct rpc_version *nfs_version[5] = {
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[2] = NULL,
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[3] = NULL,
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[4] = NULL,
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};
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const struct rpc_program nfs_program = {
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.name = "nfs",
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.number = NFS_PROGRAM,
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.nrvers = ARRAY_SIZE(nfs_version),
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.version = nfs_version,
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.stats = &nfs_rpcstat,
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.pipe_dir_name = NFS_PIPE_DIRNAME,
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};
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struct rpc_stat nfs_rpcstat = {
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.program = &nfs_program
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};
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static struct nfs_subversion *find_nfs_version(unsigned int version)
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{
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struct nfs_subversion *nfs;
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spin_lock(&nfs_version_lock);
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list_for_each_entry(nfs, &nfs_versions, list) {
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if (nfs->rpc_ops->version == version) {
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spin_unlock(&nfs_version_lock);
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return nfs;
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}
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}
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spin_unlock(&nfs_version_lock);
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return ERR_PTR(-EPROTONOSUPPORT);
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}
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struct nfs_subversion *get_nfs_version(unsigned int version)
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{
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struct nfs_subversion *nfs = find_nfs_version(version);
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if (IS_ERR(nfs)) {
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mutex_lock(&nfs_version_mutex);
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request_module("nfsv%d", version);
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nfs = find_nfs_version(version);
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mutex_unlock(&nfs_version_mutex);
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}
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if (!IS_ERR(nfs) && !try_module_get(nfs->owner))
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return ERR_PTR(-EAGAIN);
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return nfs;
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}
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void put_nfs_version(struct nfs_subversion *nfs)
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{
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module_put(nfs->owner);
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}
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void register_nfs_version(struct nfs_subversion *nfs)
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{
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spin_lock(&nfs_version_lock);
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list_add(&nfs->list, &nfs_versions);
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nfs_version[nfs->rpc_ops->version] = nfs->rpc_vers;
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spin_unlock(&nfs_version_lock);
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}
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EXPORT_SYMBOL_GPL(register_nfs_version);
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void unregister_nfs_version(struct nfs_subversion *nfs)
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{
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spin_lock(&nfs_version_lock);
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nfs_version[nfs->rpc_ops->version] = NULL;
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list_del(&nfs->list);
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spin_unlock(&nfs_version_lock);
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}
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EXPORT_SYMBOL_GPL(unregister_nfs_version);
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/*
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* Allocate a shared client record
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*
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* Since these are allocated/deallocated very rarely, we don't
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* bother putting them in a slab cache...
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*/
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struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
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{
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struct nfs_client *clp;
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int err = -ENOMEM;
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if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
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goto error_0;
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clp->cl_minorversion = cl_init->minorversion;
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clp->cl_nfs_mod = cl_init->nfs_mod;
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if (!try_module_get(clp->cl_nfs_mod->owner))
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goto error_dealloc;
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clp->rpc_ops = clp->cl_nfs_mod->rpc_ops;
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refcount_set(&clp->cl_count, 1);
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clp->cl_cons_state = NFS_CS_INITING;
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memcpy(&clp->cl_addr, cl_init->addr, cl_init->addrlen);
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clp->cl_addrlen = cl_init->addrlen;
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if (cl_init->hostname) {
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err = -ENOMEM;
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clp->cl_hostname = kstrdup(cl_init->hostname, GFP_KERNEL);
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if (!clp->cl_hostname)
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goto error_cleanup;
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}
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INIT_LIST_HEAD(&clp->cl_superblocks);
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clp->cl_rpcclient = ERR_PTR(-EINVAL);
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clp->cl_proto = cl_init->proto;
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clp->cl_nconnect = cl_init->nconnect;
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clp->cl_net = get_net(cl_init->net);
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clp->cl_principal = "*";
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nfs_fscache_get_client_cookie(clp);
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return clp;
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error_cleanup:
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put_nfs_version(clp->cl_nfs_mod);
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error_dealloc:
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kfree(clp);
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error_0:
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return ERR_PTR(err);
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}
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EXPORT_SYMBOL_GPL(nfs_alloc_client);
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#if IS_ENABLED(CONFIG_NFS_V4)
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static void nfs_cleanup_cb_ident_idr(struct net *net)
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{
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struct nfs_net *nn = net_generic(net, nfs_net_id);
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idr_destroy(&nn->cb_ident_idr);
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}
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/* nfs_client_lock held */
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static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
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{
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struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
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if (clp->cl_cb_ident)
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idr_remove(&nn->cb_ident_idr, clp->cl_cb_ident);
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}
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static void pnfs_init_server(struct nfs_server *server)
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{
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rpc_init_wait_queue(&server->roc_rpcwaitq, "pNFS ROC");
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}
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#else
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static void nfs_cleanup_cb_ident_idr(struct net *net)
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{
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}
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static void nfs_cb_idr_remove_locked(struct nfs_client *clp)
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{
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}
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static void pnfs_init_server(struct nfs_server *server)
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{
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}
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#endif /* CONFIG_NFS_V4 */
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/*
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* Destroy a shared client record
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*/
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void nfs_free_client(struct nfs_client *clp)
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{
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nfs_fscache_release_client_cookie(clp);
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/* -EIO all pending I/O */
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if (!IS_ERR(clp->cl_rpcclient))
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rpc_shutdown_client(clp->cl_rpcclient);
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put_net(clp->cl_net);
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put_nfs_version(clp->cl_nfs_mod);
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kfree(clp->cl_hostname);
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kfree(clp->cl_acceptor);
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kfree(clp);
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}
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EXPORT_SYMBOL_GPL(nfs_free_client);
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/*
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* Release a reference to a shared client record
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*/
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void nfs_put_client(struct nfs_client *clp)
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{
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struct nfs_net *nn;
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if (!clp)
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return;
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nn = net_generic(clp->cl_net, nfs_net_id);
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if (refcount_dec_and_lock(&clp->cl_count, &nn->nfs_client_lock)) {
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list_del(&clp->cl_share_link);
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nfs_cb_idr_remove_locked(clp);
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spin_unlock(&nn->nfs_client_lock);
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WARN_ON_ONCE(!list_empty(&clp->cl_superblocks));
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clp->rpc_ops->free_client(clp);
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}
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}
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EXPORT_SYMBOL_GPL(nfs_put_client);
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/*
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* Find an nfs_client on the list that matches the initialisation data
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* that is supplied.
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*/
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static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *data)
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{
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struct nfs_client *clp;
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const struct sockaddr *sap = data->addr;
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struct nfs_net *nn = net_generic(data->net, nfs_net_id);
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int error;
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again:
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list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
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const struct sockaddr *clap = (struct sockaddr *)&clp->cl_addr;
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/* Don't match clients that failed to initialise properly */
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if (clp->cl_cons_state < 0)
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continue;
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/* If a client is still initializing then we need to wait */
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if (clp->cl_cons_state > NFS_CS_READY) {
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refcount_inc(&clp->cl_count);
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spin_unlock(&nn->nfs_client_lock);
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error = nfs_wait_client_init_complete(clp);
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nfs_put_client(clp);
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spin_lock(&nn->nfs_client_lock);
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if (error < 0)
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return ERR_PTR(error);
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goto again;
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}
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/* Different NFS versions cannot share the same nfs_client */
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if (clp->rpc_ops != data->nfs_mod->rpc_ops)
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continue;
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if (clp->cl_proto != data->proto)
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continue;
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/* Match nfsv4 minorversion */
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if (clp->cl_minorversion != data->minorversion)
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continue;
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/* Match request for a dedicated DS */
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if (test_bit(NFS_CS_DS, &data->init_flags) !=
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test_bit(NFS_CS_DS, &clp->cl_flags))
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continue;
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/* Match the full socket address */
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if (!rpc_cmp_addr_port(sap, clap))
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/* Match all xprt_switch full socket addresses */
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if (IS_ERR(clp->cl_rpcclient) ||
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!rpc_clnt_xprt_switch_has_addr(clp->cl_rpcclient,
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sap))
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continue;
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refcount_inc(&clp->cl_count);
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return clp;
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}
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return NULL;
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}
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/*
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* Return true if @clp is done initializing, false if still working on it.
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*
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* Use nfs_client_init_status to check if it was successful.
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*/
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bool nfs_client_init_is_complete(const struct nfs_client *clp)
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{
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return clp->cl_cons_state <= NFS_CS_READY;
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}
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EXPORT_SYMBOL_GPL(nfs_client_init_is_complete);
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/*
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* Return 0 if @clp was successfully initialized, -errno otherwise.
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*
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* This must be called *after* nfs_client_init_is_complete() returns true,
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* otherwise it will pop WARN_ON_ONCE and return -EINVAL
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*/
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int nfs_client_init_status(const struct nfs_client *clp)
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{
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/* called without checking nfs_client_init_is_complete */
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if (clp->cl_cons_state > NFS_CS_READY) {
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WARN_ON_ONCE(1);
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return -EINVAL;
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}
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return clp->cl_cons_state;
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}
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EXPORT_SYMBOL_GPL(nfs_client_init_status);
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int nfs_wait_client_init_complete(const struct nfs_client *clp)
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{
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return wait_event_killable(nfs_client_active_wq,
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nfs_client_init_is_complete(clp));
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}
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EXPORT_SYMBOL_GPL(nfs_wait_client_init_complete);
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/*
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* Found an existing client. Make sure it's ready before returning.
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*/
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static struct nfs_client *
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nfs_found_client(const struct nfs_client_initdata *cl_init,
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struct nfs_client *clp)
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{
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int error;
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error = nfs_wait_client_init_complete(clp);
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if (error < 0) {
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nfs_put_client(clp);
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return ERR_PTR(-ERESTARTSYS);
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}
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if (clp->cl_cons_state < NFS_CS_READY) {
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error = clp->cl_cons_state;
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nfs_put_client(clp);
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return ERR_PTR(error);
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}
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smp_rmb();
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return clp;
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}
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/*
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* Look up a client by IP address and protocol version
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* - creates a new record if one doesn't yet exist
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*/
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struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
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{
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struct nfs_client *clp, *new = NULL;
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struct nfs_net *nn = net_generic(cl_init->net, nfs_net_id);
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const struct nfs_rpc_ops *rpc_ops = cl_init->nfs_mod->rpc_ops;
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if (cl_init->hostname == NULL) {
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WARN_ON(1);
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return NULL;
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}
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/* see if the client already exists */
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do {
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spin_lock(&nn->nfs_client_lock);
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clp = nfs_match_client(cl_init);
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if (clp) {
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spin_unlock(&nn->nfs_client_lock);
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if (new)
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new->rpc_ops->free_client(new);
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if (IS_ERR(clp))
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return clp;
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return nfs_found_client(cl_init, clp);
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}
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if (new) {
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list_add_tail(&new->cl_share_link,
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&nn->nfs_client_list);
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spin_unlock(&nn->nfs_client_lock);
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new->cl_flags = cl_init->init_flags;
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return rpc_ops->init_client(new, cl_init);
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}
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spin_unlock(&nn->nfs_client_lock);
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new = rpc_ops->alloc_client(cl_init);
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} while (!IS_ERR(new));
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return new;
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}
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EXPORT_SYMBOL_GPL(nfs_get_client);
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/*
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* Mark a server as ready or failed
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*/
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void nfs_mark_client_ready(struct nfs_client *clp, int state)
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{
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smp_wmb();
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clp->cl_cons_state = state;
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wake_up_all(&nfs_client_active_wq);
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}
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EXPORT_SYMBOL_GPL(nfs_mark_client_ready);
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/*
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* Initialise the timeout values for a connection
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*/
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void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
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int timeo, int retrans)
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{
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to->to_initval = timeo * HZ / 10;
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to->to_retries = retrans;
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switch (proto) {
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case XPRT_TRANSPORT_TCP:
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case XPRT_TRANSPORT_RDMA:
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if (retrans == NFS_UNSPEC_RETRANS)
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to->to_retries = NFS_DEF_TCP_RETRANS;
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if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
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to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
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if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
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to->to_initval = NFS_MAX_TCP_TIMEOUT;
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to->to_increment = to->to_initval;
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to->to_maxval = to->to_initval + (to->to_increment * to->to_retries);
|
|
if (to->to_maxval > NFS_MAX_TCP_TIMEOUT)
|
|
to->to_maxval = NFS_MAX_TCP_TIMEOUT;
|
|
if (to->to_maxval < to->to_initval)
|
|
to->to_maxval = to->to_initval;
|
|
to->to_exponential = 0;
|
|
break;
|
|
#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT
|
|
case XPRT_TRANSPORT_UDP:
|
|
if (retrans == NFS_UNSPEC_RETRANS)
|
|
to->to_retries = NFS_DEF_UDP_RETRANS;
|
|
if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
|
|
to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10;
|
|
if (to->to_initval > NFS_MAX_UDP_TIMEOUT)
|
|
to->to_initval = NFS_MAX_UDP_TIMEOUT;
|
|
to->to_maxval = NFS_MAX_UDP_TIMEOUT;
|
|
to->to_exponential = 1;
|
|
break;
|
|
#endif
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_init_timeout_values);
|
|
|
|
/*
|
|
* Create an RPC client handle
|
|
*/
|
|
int nfs_create_rpc_client(struct nfs_client *clp,
|
|
const struct nfs_client_initdata *cl_init,
|
|
rpc_authflavor_t flavor)
|
|
{
|
|
struct rpc_clnt *clnt = NULL;
|
|
struct rpc_create_args args = {
|
|
.net = clp->cl_net,
|
|
.protocol = clp->cl_proto,
|
|
.nconnect = clp->cl_nconnect,
|
|
.address = (struct sockaddr *)&clp->cl_addr,
|
|
.addrsize = clp->cl_addrlen,
|
|
.timeout = cl_init->timeparms,
|
|
.servername = clp->cl_hostname,
|
|
.nodename = cl_init->nodename,
|
|
.program = &nfs_program,
|
|
.version = clp->rpc_ops->version,
|
|
.authflavor = flavor,
|
|
.cred = cl_init->cred,
|
|
};
|
|
|
|
if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_DISCRTRY;
|
|
if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT;
|
|
if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_NONPRIVPORT;
|
|
if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS;
|
|
if (test_bit(NFS_CS_NOPING, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_NOPING;
|
|
if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags))
|
|
args.flags |= RPC_CLNT_CREATE_REUSEPORT;
|
|
|
|
if (!IS_ERR(clp->cl_rpcclient))
|
|
return 0;
|
|
|
|
clnt = rpc_create(&args);
|
|
if (IS_ERR(clnt)) {
|
|
dprintk("%s: cannot create RPC client. Error = %ld\n",
|
|
__func__, PTR_ERR(clnt));
|
|
return PTR_ERR(clnt);
|
|
}
|
|
|
|
clnt->cl_principal = clp->cl_principal;
|
|
clp->cl_rpcclient = clnt;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_create_rpc_client);
|
|
|
|
/*
|
|
* Version 2 or 3 client destruction
|
|
*/
|
|
static void nfs_destroy_server(struct nfs_server *server)
|
|
{
|
|
if (server->nlm_host)
|
|
nlmclnt_done(server->nlm_host);
|
|
}
|
|
|
|
/*
|
|
* Version 2 or 3 lockd setup
|
|
*/
|
|
static int nfs_start_lockd(struct nfs_server *server)
|
|
{
|
|
struct nlm_host *host;
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nlmclnt_initdata nlm_init = {
|
|
.hostname = clp->cl_hostname,
|
|
.address = (struct sockaddr *)&clp->cl_addr,
|
|
.addrlen = clp->cl_addrlen,
|
|
.nfs_version = clp->rpc_ops->version,
|
|
.noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
|
|
1 : 0,
|
|
.net = clp->cl_net,
|
|
.nlmclnt_ops = clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
|
|
.cred = server->cred,
|
|
};
|
|
|
|
if (nlm_init.nfs_version > 3)
|
|
return 0;
|
|
if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
|
|
(server->flags & NFS_MOUNT_LOCAL_FCNTL))
|
|
return 0;
|
|
|
|
switch (clp->cl_proto) {
|
|
default:
|
|
nlm_init.protocol = IPPROTO_TCP;
|
|
break;
|
|
#ifndef CONFIG_NFS_DISABLE_UDP_SUPPORT
|
|
case XPRT_TRANSPORT_UDP:
|
|
nlm_init.protocol = IPPROTO_UDP;
|
|
#endif
|
|
}
|
|
|
|
host = nlmclnt_init(&nlm_init);
|
|
if (IS_ERR(host))
|
|
return PTR_ERR(host);
|
|
|
|
server->nlm_host = host;
|
|
server->destroy = nfs_destroy_server;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Create a general RPC client
|
|
*/
|
|
int nfs_init_server_rpcclient(struct nfs_server *server,
|
|
const struct rpc_timeout *timeo,
|
|
rpc_authflavor_t pseudoflavour)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
|
|
server->client = rpc_clone_client_set_auth(clp->cl_rpcclient,
|
|
pseudoflavour);
|
|
if (IS_ERR(server->client)) {
|
|
dprintk("%s: couldn't create rpc_client!\n", __func__);
|
|
return PTR_ERR(server->client);
|
|
}
|
|
|
|
memcpy(&server->client->cl_timeout_default,
|
|
timeo,
|
|
sizeof(server->client->cl_timeout_default));
|
|
server->client->cl_timeout = &server->client->cl_timeout_default;
|
|
server->client->cl_softrtry = 0;
|
|
if (server->flags & NFS_MOUNT_SOFTERR)
|
|
server->client->cl_softerr = 1;
|
|
if (server->flags & NFS_MOUNT_SOFT)
|
|
server->client->cl_softrtry = 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_init_server_rpcclient);
|
|
|
|
/**
|
|
* nfs_init_client - Initialise an NFS2 or NFS3 client
|
|
*
|
|
* @clp: nfs_client to initialise
|
|
* @cl_init: Initialisation parameters
|
|
*
|
|
* Returns pointer to an NFS client, or an ERR_PTR value.
|
|
*/
|
|
struct nfs_client *nfs_init_client(struct nfs_client *clp,
|
|
const struct nfs_client_initdata *cl_init)
|
|
{
|
|
int error;
|
|
|
|
/* the client is already initialised */
|
|
if (clp->cl_cons_state == NFS_CS_READY)
|
|
return clp;
|
|
|
|
/*
|
|
* Create a client RPC handle for doing FSSTAT with UNIX auth only
|
|
* - RFC 2623, sec 2.3.2
|
|
*/
|
|
error = nfs_create_rpc_client(clp, cl_init, RPC_AUTH_UNIX);
|
|
nfs_mark_client_ready(clp, error == 0 ? NFS_CS_READY : error);
|
|
if (error < 0) {
|
|
nfs_put_client(clp);
|
|
clp = ERR_PTR(error);
|
|
}
|
|
return clp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_init_client);
|
|
|
|
/*
|
|
* Create a version 2 or 3 client
|
|
*/
|
|
static int nfs_init_server(struct nfs_server *server,
|
|
const struct fs_context *fc)
|
|
{
|
|
const struct nfs_fs_context *ctx = nfs_fc2context(fc);
|
|
struct rpc_timeout timeparms;
|
|
struct nfs_client_initdata cl_init = {
|
|
.hostname = ctx->nfs_server.hostname,
|
|
.addr = (const struct sockaddr *)&ctx->nfs_server.address,
|
|
.addrlen = ctx->nfs_server.addrlen,
|
|
.nfs_mod = ctx->nfs_mod,
|
|
.proto = ctx->nfs_server.protocol,
|
|
.net = fc->net_ns,
|
|
.timeparms = &timeparms,
|
|
.cred = server->cred,
|
|
.nconnect = ctx->nfs_server.nconnect,
|
|
.init_flags = (1UL << NFS_CS_REUSEPORT),
|
|
};
|
|
struct nfs_client *clp;
|
|
int error;
|
|
|
|
nfs_init_timeout_values(&timeparms, ctx->nfs_server.protocol,
|
|
ctx->timeo, ctx->retrans);
|
|
if (ctx->flags & NFS_MOUNT_NORESVPORT)
|
|
set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags);
|
|
|
|
/* Allocate or find a client reference we can use */
|
|
clp = nfs_get_client(&cl_init);
|
|
if (IS_ERR(clp))
|
|
return PTR_ERR(clp);
|
|
|
|
server->nfs_client = clp;
|
|
|
|
/* Initialise the client representation from the mount data */
|
|
server->flags = ctx->flags;
|
|
server->options = ctx->options;
|
|
server->caps |= NFS_CAP_HARDLINKS|NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
|
|
NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|NFS_CAP_OWNER_GROUP|
|
|
NFS_CAP_ATIME|NFS_CAP_CTIME|NFS_CAP_MTIME;
|
|
|
|
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;
|
|
|
|
/* Start lockd here, before we might error out */
|
|
error = nfs_start_lockd(server);
|
|
if (error < 0)
|
|
goto error;
|
|
|
|
server->port = ctx->nfs_server.port;
|
|
server->auth_info = ctx->auth_info;
|
|
|
|
error = nfs_init_server_rpcclient(server, &timeparms,
|
|
ctx->selected_flavor);
|
|
if (error < 0)
|
|
goto error;
|
|
|
|
/* Preserve the values of mount_server-related mount options */
|
|
if (ctx->mount_server.addrlen) {
|
|
memcpy(&server->mountd_address, &ctx->mount_server.address,
|
|
ctx->mount_server.addrlen);
|
|
server->mountd_addrlen = ctx->mount_server.addrlen;
|
|
}
|
|
server->mountd_version = ctx->mount_server.version;
|
|
server->mountd_port = ctx->mount_server.port;
|
|
server->mountd_protocol = ctx->mount_server.protocol;
|
|
|
|
server->namelen = ctx->namlen;
|
|
return 0;
|
|
|
|
error:
|
|
server->nfs_client = NULL;
|
|
nfs_put_client(clp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Load up the server record from information gained in an fsinfo record
|
|
*/
|
|
static void nfs_server_set_fsinfo(struct nfs_server *server,
|
|
struct nfs_fsinfo *fsinfo)
|
|
{
|
|
unsigned long max_rpc_payload, raw_max_rpc_payload;
|
|
|
|
/* Work out a lot of parameters */
|
|
if (server->rsize == 0)
|
|
server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
|
|
if (server->wsize == 0)
|
|
server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
|
|
|
|
if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
|
|
server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
|
|
if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
|
|
server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
|
|
|
|
raw_max_rpc_payload = rpc_max_payload(server->client);
|
|
max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL);
|
|
|
|
if (server->rsize > max_rpc_payload)
|
|
server->rsize = max_rpc_payload;
|
|
if (server->rsize > NFS_MAX_FILE_IO_SIZE)
|
|
server->rsize = NFS_MAX_FILE_IO_SIZE;
|
|
server->rpages = (server->rsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
if (server->wsize > max_rpc_payload)
|
|
server->wsize = max_rpc_payload;
|
|
if (server->wsize > NFS_MAX_FILE_IO_SIZE)
|
|
server->wsize = NFS_MAX_FILE_IO_SIZE;
|
|
server->wpages = (server->wsize + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
|
|
|
|
server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
|
|
if (server->dtsize > NFS_MAX_FILE_IO_SIZE)
|
|
server->dtsize = NFS_MAX_FILE_IO_SIZE;
|
|
if (server->dtsize > server->rsize)
|
|
server->dtsize = server->rsize;
|
|
|
|
if (server->flags & NFS_MOUNT_NOAC) {
|
|
server->acregmin = server->acregmax = 0;
|
|
server->acdirmin = server->acdirmax = 0;
|
|
}
|
|
|
|
server->maxfilesize = fsinfo->maxfilesize;
|
|
|
|
server->time_delta = fsinfo->time_delta;
|
|
|
|
server->clone_blksize = fsinfo->clone_blksize;
|
|
/* We're airborne Set socket buffersize */
|
|
rpc_setbufsize(server->client, server->wsize + 100, server->rsize + 100);
|
|
|
|
#ifdef CONFIG_NFS_V4_2
|
|
/*
|
|
* Defaults until limited by the session parameters.
|
|
*/
|
|
server->gxasize = min_t(unsigned int, raw_max_rpc_payload,
|
|
XATTR_SIZE_MAX);
|
|
server->sxasize = min_t(unsigned int, raw_max_rpc_payload,
|
|
XATTR_SIZE_MAX);
|
|
server->lxasize = min_t(unsigned int, raw_max_rpc_payload,
|
|
nfs42_listxattr_xdrsize(XATTR_LIST_MAX));
|
|
|
|
if (fsinfo->xattr_support)
|
|
server->caps |= NFS_CAP_XATTR;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Probe filesystem information, including the FSID on v2/v3
|
|
*/
|
|
int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, struct nfs_fattr *fattr)
|
|
{
|
|
struct nfs_fsinfo fsinfo;
|
|
struct nfs_client *clp = server->nfs_client;
|
|
int error;
|
|
|
|
if (clp->rpc_ops->set_capabilities != NULL) {
|
|
error = clp->rpc_ops->set_capabilities(server, mntfh);
|
|
if (error < 0)
|
|
return error;
|
|
}
|
|
|
|
fsinfo.fattr = fattr;
|
|
fsinfo.nlayouttypes = 0;
|
|
memset(fsinfo.layouttype, 0, sizeof(fsinfo.layouttype));
|
|
error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
|
|
if (error < 0)
|
|
return error;
|
|
|
|
nfs_server_set_fsinfo(server, &fsinfo);
|
|
|
|
/* Get some general file system info */
|
|
if (server->namelen == 0) {
|
|
struct nfs_pathconf pathinfo;
|
|
|
|
pathinfo.fattr = fattr;
|
|
nfs_fattr_init(fattr);
|
|
|
|
if (clp->rpc_ops->pathconf(server, mntfh, &pathinfo) >= 0)
|
|
server->namelen = pathinfo.max_namelen;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_probe_fsinfo);
|
|
|
|
/*
|
|
* Copy useful information when duplicating a server record
|
|
*/
|
|
void nfs_server_copy_userdata(struct nfs_server *target, struct nfs_server *source)
|
|
{
|
|
target->flags = source->flags;
|
|
target->rsize = source->rsize;
|
|
target->wsize = source->wsize;
|
|
target->acregmin = source->acregmin;
|
|
target->acregmax = source->acregmax;
|
|
target->acdirmin = source->acdirmin;
|
|
target->acdirmax = source->acdirmax;
|
|
target->caps = source->caps;
|
|
target->options = source->options;
|
|
target->auth_info = source->auth_info;
|
|
target->port = source->port;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_server_copy_userdata);
|
|
|
|
void nfs_server_insert_lists(struct nfs_server *server)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
|
|
|
|
spin_lock(&nn->nfs_client_lock);
|
|
list_add_tail_rcu(&server->client_link, &clp->cl_superblocks);
|
|
list_add_tail(&server->master_link, &nn->nfs_volume_list);
|
|
clear_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
|
|
spin_unlock(&nn->nfs_client_lock);
|
|
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_server_insert_lists);
|
|
|
|
void nfs_server_remove_lists(struct nfs_server *server)
|
|
{
|
|
struct nfs_client *clp = server->nfs_client;
|
|
struct nfs_net *nn;
|
|
|
|
if (clp == NULL)
|
|
return;
|
|
nn = net_generic(clp->cl_net, nfs_net_id);
|
|
spin_lock(&nn->nfs_client_lock);
|
|
list_del_rcu(&server->client_link);
|
|
if (list_empty(&clp->cl_superblocks))
|
|
set_bit(NFS_CS_STOP_RENEW, &clp->cl_res_state);
|
|
list_del(&server->master_link);
|
|
spin_unlock(&nn->nfs_client_lock);
|
|
|
|
synchronize_rcu();
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_server_remove_lists);
|
|
|
|
/*
|
|
* Allocate and initialise a server record
|
|
*/
|
|
struct nfs_server *nfs_alloc_server(void)
|
|
{
|
|
struct nfs_server *server;
|
|
|
|
server = kzalloc(sizeof(struct nfs_server), GFP_KERNEL);
|
|
if (!server)
|
|
return NULL;
|
|
|
|
server->client = server->client_acl = ERR_PTR(-EINVAL);
|
|
|
|
/* Zero out the NFS state stuff */
|
|
INIT_LIST_HEAD(&server->client_link);
|
|
INIT_LIST_HEAD(&server->master_link);
|
|
INIT_LIST_HEAD(&server->delegations);
|
|
INIT_LIST_HEAD(&server->layouts);
|
|
INIT_LIST_HEAD(&server->state_owners_lru);
|
|
INIT_LIST_HEAD(&server->ss_copies);
|
|
|
|
atomic_set(&server->active, 0);
|
|
|
|
server->io_stats = nfs_alloc_iostats();
|
|
if (!server->io_stats) {
|
|
kfree(server);
|
|
return NULL;
|
|
}
|
|
|
|
ida_init(&server->openowner_id);
|
|
ida_init(&server->lockowner_id);
|
|
pnfs_init_server(server);
|
|
rpc_init_wait_queue(&server->uoc_rpcwaitq, "NFS UOC");
|
|
|
|
return server;
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_alloc_server);
|
|
|
|
/*
|
|
* Free up a server record
|
|
*/
|
|
void nfs_free_server(struct nfs_server *server)
|
|
{
|
|
nfs_server_remove_lists(server);
|
|
|
|
if (server->destroy != NULL)
|
|
server->destroy(server);
|
|
|
|
if (!IS_ERR(server->client_acl))
|
|
rpc_shutdown_client(server->client_acl);
|
|
if (!IS_ERR(server->client))
|
|
rpc_shutdown_client(server->client);
|
|
|
|
nfs_put_client(server->nfs_client);
|
|
|
|
ida_destroy(&server->lockowner_id);
|
|
ida_destroy(&server->openowner_id);
|
|
nfs_free_iostats(server->io_stats);
|
|
put_cred(server->cred);
|
|
kfree(server);
|
|
nfs_release_automount_timer();
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_free_server);
|
|
|
|
/*
|
|
* Create a version 2 or 3 volume record
|
|
* - keyed on server and FSID
|
|
*/
|
|
struct nfs_server *nfs_create_server(struct fs_context *fc)
|
|
{
|
|
struct nfs_fs_context *ctx = nfs_fc2context(fc);
|
|
struct nfs_server *server;
|
|
struct nfs_fattr *fattr;
|
|
int error;
|
|
|
|
server = nfs_alloc_server();
|
|
if (!server)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
server->cred = get_cred(fc->cred);
|
|
|
|
error = -ENOMEM;
|
|
fattr = nfs_alloc_fattr();
|
|
if (fattr == NULL)
|
|
goto error;
|
|
|
|
/* Get a client representation */
|
|
error = nfs_init_server(server, fc);
|
|
if (error < 0)
|
|
goto error;
|
|
|
|
/* Probe the root fh to retrieve its FSID */
|
|
error = nfs_probe_fsinfo(server, ctx->mntfh, fattr);
|
|
if (error < 0)
|
|
goto error;
|
|
if (server->nfs_client->rpc_ops->version == 3) {
|
|
if (server->namelen == 0 || server->namelen > NFS3_MAXNAMLEN)
|
|
server->namelen = NFS3_MAXNAMLEN;
|
|
if (!(ctx->flags & NFS_MOUNT_NORDIRPLUS))
|
|
server->caps |= NFS_CAP_READDIRPLUS;
|
|
} else {
|
|
if (server->namelen == 0 || server->namelen > NFS2_MAXNAMLEN)
|
|
server->namelen = NFS2_MAXNAMLEN;
|
|
}
|
|
|
|
if (!(fattr->valid & NFS_ATTR_FATTR)) {
|
|
error = ctx->nfs_mod->rpc_ops->getattr(server, ctx->mntfh,
|
|
fattr, NULL, NULL);
|
|
if (error < 0) {
|
|
dprintk("nfs_create_server: getattr error = %d\n", -error);
|
|
goto error;
|
|
}
|
|
}
|
|
memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
|
|
|
|
dprintk("Server FSID: %llx:%llx\n",
|
|
(unsigned long long) server->fsid.major,
|
|
(unsigned long long) server->fsid.minor);
|
|
|
|
nfs_server_insert_lists(server);
|
|
server->mount_time = jiffies;
|
|
nfs_free_fattr(fattr);
|
|
return server;
|
|
|
|
error:
|
|
nfs_free_fattr(fattr);
|
|
nfs_free_server(server);
|
|
return ERR_PTR(error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_create_server);
|
|
|
|
/*
|
|
* Clone an NFS2, NFS3 or NFS4 server record
|
|
*/
|
|
struct nfs_server *nfs_clone_server(struct nfs_server *source,
|
|
struct nfs_fh *fh,
|
|
struct nfs_fattr *fattr,
|
|
rpc_authflavor_t flavor)
|
|
{
|
|
struct nfs_server *server;
|
|
struct nfs_fattr *fattr_fsinfo;
|
|
int error;
|
|
|
|
server = nfs_alloc_server();
|
|
if (!server)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
server->cred = get_cred(source->cred);
|
|
|
|
error = -ENOMEM;
|
|
fattr_fsinfo = nfs_alloc_fattr();
|
|
if (fattr_fsinfo == NULL)
|
|
goto out_free_server;
|
|
|
|
/* Copy data from the source */
|
|
server->nfs_client = source->nfs_client;
|
|
server->destroy = source->destroy;
|
|
refcount_inc(&server->nfs_client->cl_count);
|
|
nfs_server_copy_userdata(server, source);
|
|
|
|
server->fsid = fattr->fsid;
|
|
|
|
error = nfs_init_server_rpcclient(server,
|
|
source->client->cl_timeout,
|
|
flavor);
|
|
if (error < 0)
|
|
goto out_free_server;
|
|
|
|
/* probe the filesystem info for this server filesystem */
|
|
error = nfs_probe_fsinfo(server, fh, fattr_fsinfo);
|
|
if (error < 0)
|
|
goto out_free_server;
|
|
|
|
if (server->namelen == 0 || server->namelen > NFS4_MAXNAMLEN)
|
|
server->namelen = NFS4_MAXNAMLEN;
|
|
|
|
error = nfs_start_lockd(server);
|
|
if (error < 0)
|
|
goto out_free_server;
|
|
|
|
nfs_server_insert_lists(server);
|
|
server->mount_time = jiffies;
|
|
|
|
nfs_free_fattr(fattr_fsinfo);
|
|
return server;
|
|
|
|
out_free_server:
|
|
nfs_free_fattr(fattr_fsinfo);
|
|
nfs_free_server(server);
|
|
return ERR_PTR(error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(nfs_clone_server);
|
|
|
|
void nfs_clients_init(struct net *net)
|
|
{
|
|
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
|
|
|
INIT_LIST_HEAD(&nn->nfs_client_list);
|
|
INIT_LIST_HEAD(&nn->nfs_volume_list);
|
|
#if IS_ENABLED(CONFIG_NFS_V4)
|
|
idr_init(&nn->cb_ident_idr);
|
|
#endif
|
|
spin_lock_init(&nn->nfs_client_lock);
|
|
nn->boot_time = ktime_get_real();
|
|
|
|
nfs_netns_sysfs_setup(nn, net);
|
|
}
|
|
|
|
void nfs_clients_exit(struct net *net)
|
|
{
|
|
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
|
|
|
nfs_netns_sysfs_destroy(nn);
|
|
nfs_cleanup_cb_ident_idr(net);
|
|
WARN_ON_ONCE(!list_empty(&nn->nfs_client_list));
|
|
WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list));
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static void *nfs_server_list_start(struct seq_file *p, loff_t *pos);
|
|
static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos);
|
|
static void nfs_server_list_stop(struct seq_file *p, void *v);
|
|
static int nfs_server_list_show(struct seq_file *m, void *v);
|
|
|
|
static const struct seq_operations nfs_server_list_ops = {
|
|
.start = nfs_server_list_start,
|
|
.next = nfs_server_list_next,
|
|
.stop = nfs_server_list_stop,
|
|
.show = nfs_server_list_show,
|
|
};
|
|
|
|
static void *nfs_volume_list_start(struct seq_file *p, loff_t *pos);
|
|
static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos);
|
|
static void nfs_volume_list_stop(struct seq_file *p, void *v);
|
|
static int nfs_volume_list_show(struct seq_file *m, void *v);
|
|
|
|
static const struct seq_operations nfs_volume_list_ops = {
|
|
.start = nfs_volume_list_start,
|
|
.next = nfs_volume_list_next,
|
|
.stop = nfs_volume_list_stop,
|
|
.show = nfs_volume_list_show,
|
|
};
|
|
|
|
/*
|
|
* set up the iterator to start reading from the server list and return the first item
|
|
*/
|
|
static void *nfs_server_list_start(struct seq_file *m, loff_t *_pos)
|
|
__acquires(&nn->nfs_client_lock)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
|
|
|
|
/* lock the list against modification */
|
|
spin_lock(&nn->nfs_client_lock);
|
|
return seq_list_start_head(&nn->nfs_client_list, *_pos);
|
|
}
|
|
|
|
/*
|
|
* move to next server
|
|
*/
|
|
static void *nfs_server_list_next(struct seq_file *p, void *v, loff_t *pos)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
|
|
|
|
return seq_list_next(v, &nn->nfs_client_list, pos);
|
|
}
|
|
|
|
/*
|
|
* clean up after reading from the transports list
|
|
*/
|
|
static void nfs_server_list_stop(struct seq_file *p, void *v)
|
|
__releases(&nn->nfs_client_lock)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
|
|
|
|
spin_unlock(&nn->nfs_client_lock);
|
|
}
|
|
|
|
/*
|
|
* display a header line followed by a load of call lines
|
|
*/
|
|
static int nfs_server_list_show(struct seq_file *m, void *v)
|
|
{
|
|
struct nfs_client *clp;
|
|
struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
|
|
|
|
/* display header on line 1 */
|
|
if (v == &nn->nfs_client_list) {
|
|
seq_puts(m, "NV SERVER PORT USE HOSTNAME\n");
|
|
return 0;
|
|
}
|
|
|
|
/* display one transport per line on subsequent lines */
|
|
clp = list_entry(v, struct nfs_client, cl_share_link);
|
|
|
|
/* Check if the client is initialized */
|
|
if (clp->cl_cons_state != NFS_CS_READY)
|
|
return 0;
|
|
|
|
rcu_read_lock();
|
|
seq_printf(m, "v%u %s %s %3d %s\n",
|
|
clp->rpc_ops->version,
|
|
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
|
|
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
|
|
refcount_read(&clp->cl_count),
|
|
clp->cl_hostname);
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* set up the iterator to start reading from the volume list and return the first item
|
|
*/
|
|
static void *nfs_volume_list_start(struct seq_file *m, loff_t *_pos)
|
|
__acquires(&nn->nfs_client_lock)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
|
|
|
|
/* lock the list against modification */
|
|
spin_lock(&nn->nfs_client_lock);
|
|
return seq_list_start_head(&nn->nfs_volume_list, *_pos);
|
|
}
|
|
|
|
/*
|
|
* move to next volume
|
|
*/
|
|
static void *nfs_volume_list_next(struct seq_file *p, void *v, loff_t *pos)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
|
|
|
|
return seq_list_next(v, &nn->nfs_volume_list, pos);
|
|
}
|
|
|
|
/*
|
|
* clean up after reading from the transports list
|
|
*/
|
|
static void nfs_volume_list_stop(struct seq_file *p, void *v)
|
|
__releases(&nn->nfs_client_lock)
|
|
{
|
|
struct nfs_net *nn = net_generic(seq_file_net(p), nfs_net_id);
|
|
|
|
spin_unlock(&nn->nfs_client_lock);
|
|
}
|
|
|
|
/*
|
|
* display a header line followed by a load of call lines
|
|
*/
|
|
static int nfs_volume_list_show(struct seq_file *m, void *v)
|
|
{
|
|
struct nfs_server *server;
|
|
struct nfs_client *clp;
|
|
char dev[13]; // 8 for 2^24, 1 for ':', 3 for 2^8, 1 for '\0'
|
|
char fsid[34]; // 2 * 16 for %llx, 1 for ':', 1 for '\0'
|
|
struct nfs_net *nn = net_generic(seq_file_net(m), nfs_net_id);
|
|
|
|
/* display header on line 1 */
|
|
if (v == &nn->nfs_volume_list) {
|
|
seq_puts(m, "NV SERVER PORT DEV FSID"
|
|
" FSC\n");
|
|
return 0;
|
|
}
|
|
/* display one transport per line on subsequent lines */
|
|
server = list_entry(v, struct nfs_server, master_link);
|
|
clp = server->nfs_client;
|
|
|
|
snprintf(dev, sizeof(dev), "%u:%u",
|
|
MAJOR(server->s_dev), MINOR(server->s_dev));
|
|
|
|
snprintf(fsid, sizeof(fsid), "%llx:%llx",
|
|
(unsigned long long) server->fsid.major,
|
|
(unsigned long long) server->fsid.minor);
|
|
|
|
rcu_read_lock();
|
|
seq_printf(m, "v%u %s %s %-12s %-33s %s\n",
|
|
clp->rpc_ops->version,
|
|
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_ADDR),
|
|
rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_HEX_PORT),
|
|
dev,
|
|
fsid,
|
|
nfs_server_fscache_state(server));
|
|
rcu_read_unlock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int nfs_fs_proc_net_init(struct net *net)
|
|
{
|
|
struct nfs_net *nn = net_generic(net, nfs_net_id);
|
|
struct proc_dir_entry *p;
|
|
|
|
nn->proc_nfsfs = proc_net_mkdir(net, "nfsfs", net->proc_net);
|
|
if (!nn->proc_nfsfs)
|
|
goto error_0;
|
|
|
|
/* a file of servers with which we're dealing */
|
|
p = proc_create_net("servers", S_IFREG|S_IRUGO, nn->proc_nfsfs,
|
|
&nfs_server_list_ops, sizeof(struct seq_net_private));
|
|
if (!p)
|
|
goto error_1;
|
|
|
|
/* a file of volumes that we have mounted */
|
|
p = proc_create_net("volumes", S_IFREG|S_IRUGO, nn->proc_nfsfs,
|
|
&nfs_volume_list_ops, sizeof(struct seq_net_private));
|
|
if (!p)
|
|
goto error_1;
|
|
return 0;
|
|
|
|
error_1:
|
|
remove_proc_subtree("nfsfs", net->proc_net);
|
|
error_0:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
void nfs_fs_proc_net_exit(struct net *net)
|
|
{
|
|
remove_proc_subtree("nfsfs", net->proc_net);
|
|
}
|
|
|
|
/*
|
|
* initialise the /proc/fs/nfsfs/ directory
|
|
*/
|
|
int __init nfs_fs_proc_init(void)
|
|
{
|
|
if (!proc_mkdir("fs/nfsfs", NULL))
|
|
goto error_0;
|
|
|
|
/* a file of servers with which we're dealing */
|
|
if (!proc_symlink("fs/nfsfs/servers", NULL, "../../net/nfsfs/servers"))
|
|
goto error_1;
|
|
|
|
/* a file of volumes that we have mounted */
|
|
if (!proc_symlink("fs/nfsfs/volumes", NULL, "../../net/nfsfs/volumes"))
|
|
goto error_1;
|
|
|
|
return 0;
|
|
error_1:
|
|
remove_proc_subtree("fs/nfsfs", NULL);
|
|
error_0:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* clean up the /proc/fs/nfsfs/ directory
|
|
*/
|
|
void nfs_fs_proc_exit(void)
|
|
{
|
|
remove_proc_subtree("fs/nfsfs", NULL);
|
|
}
|
|
|
|
#endif /* CONFIG_PROC_FS */
|