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1390 lines
35 KiB
1390 lines
35 KiB
// 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 ([email protected]) |
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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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/* |
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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_flags = cl_init->init_flags; |
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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_max_connect = cl_init->max_connect ? cl_init->max_connect : 1; |
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clp->cl_net = get_net(cl_init->net); |
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clp->cl_principal = "*"; |
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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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|
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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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/* -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 ERR_PTR(-EINVAL); |
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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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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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/* |
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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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|
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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); |
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if (to->to_maxval > NFS_MAX_TCP_TIMEOUT) |
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to->to_maxval = NFS_MAX_TCP_TIMEOUT; |
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if (to->to_maxval < to->to_initval) |
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to->to_maxval = to->to_initval; |
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to->to_exponential = 0; |
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break; |
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case XPRT_TRANSPORT_UDP: |
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if (retrans == NFS_UNSPEC_RETRANS) |
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to->to_retries = NFS_DEF_UDP_RETRANS; |
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if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0) |
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to->to_initval = NFS_DEF_UDP_TIMEO * HZ / 10; |
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if (to->to_initval > NFS_MAX_UDP_TIMEOUT) |
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to->to_initval = NFS_MAX_UDP_TIMEOUT; |
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to->to_maxval = NFS_MAX_UDP_TIMEOUT; |
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to->to_exponential = 1; |
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break; |
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default: |
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BUG(); |
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} |
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} |
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EXPORT_SYMBOL_GPL(nfs_init_timeout_values); |
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|
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/* |
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* Create an RPC client handle |
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*/ |
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int nfs_create_rpc_client(struct nfs_client *clp, |
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const struct nfs_client_initdata *cl_init, |
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rpc_authflavor_t flavor) |
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{ |
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struct rpc_clnt *clnt = NULL; |
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struct rpc_create_args args = { |
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.net = clp->cl_net, |
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.protocol = clp->cl_proto, |
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.nconnect = clp->cl_nconnect, |
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.address = (struct sockaddr *)&clp->cl_addr, |
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.addrsize = clp->cl_addrlen, |
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.timeout = cl_init->timeparms, |
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.servername = clp->cl_hostname, |
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.nodename = cl_init->nodename, |
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.program = &nfs_program, |
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.version = clp->rpc_ops->version, |
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.authflavor = flavor, |
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.cred = cl_init->cred, |
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}; |
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|
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if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_DISCRTRY; |
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if (test_bit(NFS_CS_NO_RETRANS_TIMEOUT, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_NO_RETRANS_TIMEOUT; |
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if (test_bit(NFS_CS_NORESVPORT, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_NONPRIVPORT; |
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if (test_bit(NFS_CS_INFINITE_SLOTS, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_INFINITE_SLOTS; |
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if (test_bit(NFS_CS_NOPING, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_NOPING; |
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if (test_bit(NFS_CS_REUSEPORT, &clp->cl_flags)) |
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args.flags |= RPC_CLNT_CREATE_REUSEPORT; |
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|
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if (!IS_ERR(clp->cl_rpcclient)) |
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return 0; |
|
|
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clnt = rpc_create(&args); |
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if (IS_ERR(clnt)) { |
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dprintk("%s: cannot create RPC client. Error = %ld\n", |
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__func__, PTR_ERR(clnt)); |
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return PTR_ERR(clnt); |
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} |
|
|
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clnt->cl_principal = clp->cl_principal; |
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clp->cl_rpcclient = clnt; |
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clnt->cl_max_connect = clp->cl_max_connect; |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(nfs_create_rpc_client); |
|
|
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/* |
|
* 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; |
|
|
|
switch (clp->rpc_ops->version) { |
|
case 2: |
|
server->fattr_valid = NFS_ATTR_FATTR_V2; |
|
break; |
|
case 3: |
|
server->fattr_valid = NFS_ATTR_FATTR_V3; |
|
break; |
|
default: |
|
server->fattr_valid = NFS_ATTR_FATTR_V4; |
|
} |
|
|
|
if (ctx->rsize) |
|
server->rsize = nfs_io_size(ctx->rsize, clp->cl_proto); |
|
if (ctx->wsize) |
|
server->wsize = nfs_io_size(ctx->wsize, clp->cl_proto); |
|
|
|
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) |
|
{ |
|
struct nfs_client *clp = server->nfs_client; |
|
unsigned long max_rpc_payload, raw_max_rpc_payload; |
|
|
|
/* Work out a lot of parameters */ |
|
if (server->rsize == 0) |
|
server->rsize = nfs_io_size(fsinfo->rtpref, clp->cl_proto); |
|
if (server->wsize == 0) |
|
server->wsize = nfs_io_size(fsinfo->wtpref, clp->cl_proto); |
|
|
|
if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax) |
|
server->rsize = nfs_io_size(fsinfo->rtmax, clp->cl_proto); |
|
if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax) |
|
server->wsize = nfs_io_size(fsinfo->wtmax, clp->cl_proto); |
|
|
|
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->change_attr_type = fsinfo->change_attr_type; |
|
|
|
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 |
|
*/ |
|
static 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; |
|
} |
|
|
|
if (clp->rpc_ops->discover_trunking != NULL && |
|
(server->caps & NFS_CAP_FS_LOCATIONS && |
|
(server->flags & NFS_MOUNT_TRUNK_DISCOVERY))) { |
|
error = clp->rpc_ops->discover_trunking(server, mntfh); |
|
if (error < 0) |
|
return error; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Grab the destination's particulars, including lease expiry time. |
|
* |
|
* Returns zero if probe succeeded and retrieved FSID matches the FSID |
|
* we have cached. |
|
*/ |
|
int nfs_probe_server(struct nfs_server *server, struct nfs_fh *mntfh) |
|
{ |
|
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, mntfh, fattr); |
|
|
|
nfs_free_fattr(fattr); |
|
return error; |
|
} |
|
EXPORT_SYMBOL_GPL(nfs_probe_server); |
|
|
|
/* |
|
* 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; |
|
} |
|
|
|
server->change_attr_type = NFS4_CHANGE_TYPE_IS_UNDEFINED; |
|
|
|
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); |
|
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; |
|
int error; |
|
|
|
server = nfs_alloc_server(); |
|
if (!server) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
server->cred = get_cred(source->cred); |
|
|
|
/* 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_server(server, fh); |
|
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; |
|
|
|
return server; |
|
|
|
out_free_server: |
|
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 */
|
|
|