Merge branch 'for-3.5' of git://linux-nfs.org/~bfields/linux

Pull the rest of the nfsd commits from Bruce Fields:
"... and then I cherry-picked the remainder of the patches from the
head of my previous branch"

This is the rest of the original nfsd branch, rebased without the
delegation stuff that I thought really needed to be redone.

I don't like rebasing things like this in general, but in this situation
this was the lesser of two evils.

* 'for-3.5' of git://linux-nfs.org/~bfields/linux: (50 commits)
nfsd4: fix, consolidate client_has_state
nfsd4: don't remove rebooted client record until confirmation
nfsd4: remove some dprintk's and a comment
nfsd4: return "real" sequence id in confirmed case
nfsd4: fix exchange_id to return confirm flag
nfsd4: clarify that renewing expired client is a bug
nfsd4: simpler ordering of setclientid_confirm checks
nfsd4: setclientid: remove pointless assignment
nfsd4: fix error return in non-matching-creds case
nfsd4: fix setclientid_confirm same_cred check
nfsd4: merge 3 setclientid cases to 2
nfsd4: pull out common code from setclientid cases
nfsd4: merge last two setclientid cases
nfsd4: setclientid/confirm comment cleanup
nfsd4: setclientid remove unnecessary terms from a logical expression
nfsd4: move rq_flavor into svc_cred
nfsd4: stricter cred comparison for setclientid/exchange_id
nfsd4: move principal name into svc_cred
nfsd4: allow removing clients not holding state
nfsd4: rearrange exchange_id logic to simplify
...

fs/lockd/svc.c

···
 	return err;
 }
 
-static int lockd_up_net(struct net *net)
+static int lockd_up_net(struct svc_serv *serv, struct net *net)
 {
 	struct lockd_net *ln = net_generic(net, lockd_net_id);
-	struct svc_serv *serv = nlmsvc_rqst->rq_server;
 	int error;
 
-	if (ln->nlmsvc_users)
+	if (ln->nlmsvc_users++)
 		return 0;
 
-	error = svc_rpcb_setup(serv, net);
+	error = svc_bind(serv, net);
 	if (error)
-		goto err_rpcb;
+		goto err_bind;
 
 	error = make_socks(serv, net);
 	if (error < 0)
 		goto err_socks;
+	dprintk("lockd_up_net: per-net data created; net=%p\n", net);
 	return 0;
 
 err_socks:
 	svc_rpcb_cleanup(serv, net);
-err_rpcb:
+err_bind:
+	ln->nlmsvc_users--;
 	return error;
 }
 
-static void lockd_down_net(struct net *net)
+static void lockd_down_net(struct svc_serv *serv, struct net *net)
 {
 	struct lockd_net *ln = net_generic(net, lockd_net_id);
-	struct svc_serv *serv = nlmsvc_rqst->rq_server;
 
 	if (ln->nlmsvc_users) {
 		if (--ln->nlmsvc_users == 0) {
 			nlm_shutdown_hosts_net(net);
 			svc_shutdown_net(serv, net);
+			dprintk("lockd_down_net: per-net data destroyed; net=%p\n", net);
 		}
 	} else {
 		printk(KERN_ERR "lockd_down_net: no users! task=%p, net=%p\n",
···
 	}
 }
 
-/*
- * Bring up the lockd process if it's not already up.
- */
-int lockd_up(struct net *net)
+static int lockd_start_svc(struct svc_serv *serv)
+{
+	int error;
+
+	if (nlmsvc_rqst)
+		return 0;
+
+	/*
+	 * Create the kernel thread and wait for it to start.
+	 */
+	nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
+	if (IS_ERR(nlmsvc_rqst)) {
+		error = PTR_ERR(nlmsvc_rqst);
+		printk(KERN_WARNING
+			"lockd_up: svc_rqst allocation failed, error=%d\n",
+			error);
+		goto out_rqst;
+	}
+
+	svc_sock_update_bufs(serv);
+	serv->sv_maxconn = nlm_max_connections;
+
+	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
+	if (IS_ERR(nlmsvc_task)) {
+		error = PTR_ERR(nlmsvc_task);
+		printk(KERN_WARNING
+			"lockd_up: kthread_run failed, error=%d\n", error);
+		goto out_task;
+	}
+	dprintk("lockd_up: service started\n");
+	return 0;
+
+out_task:
+	svc_exit_thread(nlmsvc_rqst);
+	nlmsvc_task = NULL;
+out_rqst:
+	nlmsvc_rqst = NULL;
+	return error;
+}
+
+static struct svc_serv *lockd_create_svc(void)
 {
 	struct svc_serv *serv;
-	int		error = 0;
 
-	mutex_lock(&nlmsvc_mutex);
 	/*
 	 * Check whether we're already up and running.
 	 */
 	if (nlmsvc_rqst) {
-		error = lockd_up_net(net);
-		goto out;
+		/*
+		 * Note: increase service usage, because later in case of error
+		 * svc_destroy() will be called.
+		 */
+		svc_get(nlmsvc_rqst->rq_server);
+		return nlmsvc_rqst->rq_server;
 	}
 
 	/*
···
 		printk(KERN_WARNING
 			"lockd_up: no pid, %d users??\n", nlmsvc_users);
 
-	error = -ENOMEM;
 	serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
 	if (!serv) {
 		printk(KERN_WARNING "lockd_up: create service failed\n");
-		goto out;
+		return ERR_PTR(-ENOMEM);
+	}
+	dprintk("lockd_up: service created\n");
+	return serv;
+}
+
+/*
+ * Bring up the lockd process if it's not already up.
+ */
+int lockd_up(struct net *net)
+{
+	struct svc_serv *serv;
+	int error;
+
+	mutex_lock(&nlmsvc_mutex);
+
+	serv = lockd_create_svc();
+	if (IS_ERR(serv)) {
+		error = PTR_ERR(serv);
+		goto err_create;
 	}
 
-	error = make_socks(serv, net);
+	error = lockd_up_net(serv, net);
 	if (error < 0)
-		goto destroy_and_out;
+		goto err_net;
 
-	/*
-	 * Create the kernel thread and wait for it to start.
-	 */
-	nlmsvc_rqst = svc_prepare_thread(serv, &serv->sv_pools[0], NUMA_NO_NODE);
-	if (IS_ERR(nlmsvc_rqst)) {
-		error = PTR_ERR(nlmsvc_rqst);
-		nlmsvc_rqst = NULL;
-		printk(KERN_WARNING
-			"lockd_up: svc_rqst allocation failed, error=%d\n",
-			error);
-		goto destroy_and_out;
-	}
+	error = lockd_start_svc(serv);
+	if (error < 0)
+		goto err_start;
 
-	svc_sock_update_bufs(serv);
-	serv->sv_maxconn = nlm_max_connections;
-
-	nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
-	if (IS_ERR(nlmsvc_task)) {
-		error = PTR_ERR(nlmsvc_task);
-		svc_exit_thread(nlmsvc_rqst);
-		nlmsvc_task = NULL;
-		nlmsvc_rqst = NULL;
-		printk(KERN_WARNING
-			"lockd_up: kthread_run failed, error=%d\n", error);
-		goto destroy_and_out;
-	}
-
+	nlmsvc_users++;
 	/*
 	 * Note: svc_serv structures have an initial use count of 1,
 	 * so we exit through here on both success and failure.
 	 */
-destroy_and_out:
+err_net:
 	svc_destroy(serv);
-out:
-	if (!error) {
-		struct lockd_net *ln = net_generic(net, lockd_net_id);
-
-		ln->nlmsvc_users++;
-		nlmsvc_users++;
-	}
+err_create:
 	mutex_unlock(&nlmsvc_mutex);
 	return error;
+
+err_start:
+	lockd_down_net(serv, net);
+	goto err_net;
 }
 EXPORT_SYMBOL_GPL(lockd_up);
 
···
 lockd_down(struct net *net)
 {
 	mutex_lock(&nlmsvc_mutex);
+	lockd_down_net(nlmsvc_rqst->rq_server, net);
 	if (nlmsvc_users) {
-		if (--nlmsvc_users) {
-			lockd_down_net(net);
+		if (--nlmsvc_users)
 			goto out;
-		}
 	} else {
 		printk(KERN_ERR "lockd_down: no users! task=%p\n",
 			nlmsvc_task);
···
 		BUG();
 	}
 	kthread_stop(nlmsvc_task);
+	dprintk("lockd_down: service stopped\n");
 	svc_exit_thread(nlmsvc_rqst);
+	dprintk("lockd_down: service destroyed\n");
 	nlmsvc_task = NULL;
 	nlmsvc_rqst = NULL;
 out:

fs/nfs/callback.c

···
 #include <linux/kthread.h>
 #include <linux/sunrpc/svcauth_gss.h>
 #include <linux/sunrpc/bc_xprt.h>
+#include <linux/nsproxy.h>
 
 #include <net/inet_sock.h>
 
···
 	char svc_name[12];
 	int ret = 0;
 	int minorversion_setup;
+	struct net *net = current->nsproxy->net_ns;
 
 	mutex_lock(&nfs_callback_mutex);
 	if (cb_info->users++ || cb_info->task != NULL) {
···
 	serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);
 	if (!serv) {
 		ret = -ENOMEM;
+		goto out_err;
+	}
+
+	ret = svc_bind(serv, net);
+	if (ret < 0) {
+		printk(KERN_WARNING "NFS: bind callback service failed\n");
 		goto out_err;
 	}
 
···
 	dprintk("NFS: Couldn't create callback socket or server thread; "
 		"err = %d\n", ret);
 	cb_info->users--;
+	if (serv)
+		svc_shutdown_net(serv, net);
 	goto out;
 }
 
···
 	cb_info->users--;
 	if (cb_info->users == 0 && cb_info->task != NULL) {
 		kthread_stop(cb_info->task);
+		svc_shutdown_net(cb_info->serv, current->nsproxy->net_ns);
 		svc_exit_thread(cb_info->rqst);
 		cb_info->serv = NULL;
 		cb_info->rqst = NULL;
···
 int
 check_gss_callback_principal(struct nfs_client *clp, struct svc_rqst *rqstp)
 {
-	char *p = svc_gss_principal(rqstp);
+	char *p = rqstp->rq_cred.cr_principal;
 
 	if (rqstp->rq_authop->flavour != RPC_AUTH_GSS)
 		return 1;

fs/nfsd/auth.c

···
 	struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors;
 
 	for (f = exp->ex_flavors; f < end; f++) {
-		if (f->pseudoflavor == rqstp->rq_flavor)
+		if (f->pseudoflavor == rqstp->rq_cred.cr_flavor)
 			return f->flags;
 	}
 	return exp->ex_flags;

fs/nfsd/export.c

···
 		return NULL;
 }
 
-struct cache_detail svc_export_cache_template = {
+static struct cache_detail svc_export_cache_template = {
 	.owner		= THIS_MODULE,
 	.hash_size	= EXPORT_HASHMAX,
 	.name		= "nfsd.export",
···
 		return 0;
 	/* ip-address based client; check sec= export option: */
 	for (f = exp->ex_flavors; f < end; f++) {
-		if (f->pseudoflavor == rqstp->rq_flavor)
+		if (f->pseudoflavor == rqstp->rq_cred.cr_flavor)
 			return 0;
 	}
 	/* defaults in absence of sec= options: */
 	if (exp->ex_nflavors == 0) {
-		if (rqstp->rq_flavor == RPC_AUTH_NULL ||
-		    rqstp->rq_flavor == RPC_AUTH_UNIX)
+		if (rqstp->rq_cred.cr_flavor == RPC_AUTH_NULL ||
+		    rqstp->rq_cred.cr_flavor == RPC_AUTH_UNIX)
 			return 0;
 	}
 	return nfserr_wrongsec;

fs/nfsd/fault_inject.c

···
 
 static int nfsd_inject_get(void *data, u64 *val)
 {
+	*val = 0;
 	return 0;
 }
 

fs/nfsd/nfs4callback.c

···
 	struct rpc_clnt *client;
 
 	if (clp->cl_minorversion == 0) {
-		if (!clp->cl_principal && (clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
+		if (!clp->cl_cred.cr_principal &&
+				(clp->cl_flavor >= RPC_AUTH_GSS_KRB5))
 			return -EINVAL;
-		args.client_name = clp->cl_principal;
+		args.client_name = clp->cl_cred.cr_principal;
 		args.prognumber	= conn->cb_prog,
 		args.protocol = XPRT_TRANSPORT_TCP;
 		args.authflavor = clp->cl_flavor;

fs/nfsd/nfs4idmap.c

···
 static __be32
 do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, uid_t *id)
 {
-	if (nfs4_disable_idmapping && rqstp->rq_flavor < RPC_AUTH_GSS)
+	if (nfs4_disable_idmapping && rqstp->rq_cred.cr_flavor < RPC_AUTH_GSS)
 		if (numeric_name_to_id(rqstp, type, name, namelen, id))
 			return 0;
 		/*
···
 static int
 do_id_to_name(struct svc_rqst *rqstp, int type, uid_t id, char *name)
 {
-	if (nfs4_disable_idmapping && rqstp->rq_flavor < RPC_AUTH_GSS)
+	if (nfs4_disable_idmapping && rqstp->rq_cred.cr_flavor < RPC_AUTH_GSS)
 		return sprintf(name, "%u", id);
 	return idmap_id_to_name(rqstp, type, id, name);
 }

fs/nfsd/nfs4recover.c

···
 cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 {
 	struct cld_upcall *tmp, *cup;
-	struct cld_msg *cmsg = (struct cld_msg *)src;
+	struct cld_msg __user *cmsg = (struct cld_msg __user *)src;
 	uint32_t xid;
 	struct nfsd_net *nn = net_generic(filp->f_dentry->d_sb->s_fs_info,
 						nfsd_net_id);
···
 	return ret;
 }
 
-struct notifier_block nfsd4_cld_block = {
+static struct notifier_block nfsd4_cld_block = {
 	.notifier_call = rpc_pipefs_event,
 };
 

fs/nfsd/nfs4state.c

···
 #include <linux/sunrpc/clnt.h>
 #include "xdr4.h"
 #include "vfs.h"
+#include "current_stateid.h"
 
 #define NFSDDBG_FACILITY                NFSDDBG_PROC
 
···
  *
  * which we should reject.
  */
-static void
-set_access(unsigned int *access, unsigned long bmap) {
+static unsigned int
+bmap_to_share_mode(unsigned long bmap) {
 	int i;
+	unsigned int access = 0;
 
-	*access = 0;
 	for (i = 1; i < 4; i++) {
 		if (test_bit(i, &bmap))
-			*access |= i;
+			access |= i;
 	}
+	return access;
 }
 
-static void
-set_deny(unsigned int *deny, unsigned long bmap) {
-	int i;
-
-	*deny = 0;
-	for (i = 0; i < 4; i++) {
-		if (test_bit(i, &bmap))
-			*deny |= i ;
-	}
-}
-
-static int
+static bool
 test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) {
 	unsigned int access, deny;
 
-	set_access(&access, stp->st_access_bmap);
-	set_deny(&deny, stp->st_deny_bmap);
+	access = bmap_to_share_mode(stp->st_access_bmap);
+	deny = bmap_to_share_mode(stp->st_deny_bmap);
 	if ((access & open->op_share_deny) || (deny & open->op_share_access))
-		return 0;
-	return 1;
+		return false;
+	return true;
+}
+
+/* set share access for a given stateid */
+static inline void
+set_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+	__set_bit(access, &stp->st_access_bmap);
+}
+
+/* clear share access for a given stateid */
+static inline void
+clear_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+	__clear_bit(access, &stp->st_access_bmap);
+}
+
+/* test whether a given stateid has access */
+static inline bool
+test_access(u32 access, struct nfs4_ol_stateid *stp)
+{
+	return test_bit(access, &stp->st_access_bmap);
+}
+
+/* set share deny for a given stateid */
+static inline void
+set_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+	__set_bit(access, &stp->st_deny_bmap);
+}
+
+/* clear share deny for a given stateid */
+static inline void
+clear_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+	__clear_bit(access, &stp->st_deny_bmap);
+}
+
+/* test whether a given stateid is denying specific access */
+static inline bool
+test_deny(u32 access, struct nfs4_ol_stateid *stp)
+{
+	return test_bit(access, &stp->st_deny_bmap);
 }
 
 static int nfs4_access_to_omode(u32 access)
···
 	BUG();
 }
 
+/* release all access and file references for a given stateid */
+static void
+release_all_access(struct nfs4_ol_stateid *stp)
+{
+	int i;
+
+	for (i = 1; i < 4; i++) {
+		if (test_access(i, stp))
+			nfs4_file_put_access(stp->st_file,
+					     nfs4_access_to_omode(i));
+		clear_access(i, stp);
+	}
+}
+
 static void unhash_generic_stateid(struct nfs4_ol_stateid *stp)
 {
 	list_del(&stp->st_perfile);
···
 
 static void close_generic_stateid(struct nfs4_ol_stateid *stp)
 {
-	int i;
-
-	if (stp->st_access_bmap) {
-		for (i = 1; i < 4; i++) {
-			if (test_bit(i, &stp->st_access_bmap))
-				nfs4_file_put_access(stp->st_file,
-						nfs4_access_to_omode(i));
-			__clear_bit(i, &stp->st_access_bmap);
-		}
-	}
+	release_all_access(stp);
 	put_nfs4_file(stp->st_file);
 	stp->st_file = NULL;
 }
···
 	struct nfsd4_session *new;
 	struct nfsd4_channel_attrs *fchan = &cses->fore_channel;
 	int numslots, slotsize;
-	int status;
+	__be32 status;
 	int idx;
 
 	/*
···
 renew_client_locked(struct nfs4_client *clp)
 {
 	if (is_client_expired(clp)) {
-		dprintk("%s: client (clientid %08x/%08x) already expired\n",
+		WARN_ON(1);
+		printk("%s: client (clientid %08x/%08x) already expired\n",
 			__func__,
 			clp->cl_clientid.cl_boot,
 			clp->cl_clientid.cl_id);
···
 		list_del(&ses->se_perclnt);
 		nfsd4_put_session_locked(ses);
 	}
-	if (clp->cl_cred.cr_group_info)
-		put_group_info(clp->cl_cred.cr_group_info);
-	kfree(clp->cl_principal);
+	free_svc_cred(&clp->cl_cred);
 	kfree(clp->cl_name.data);
 	kfree(clp);
 }
···
 	target->cl_clientid.cl_id = source->cl_clientid.cl_id; 
 }
 
-static void copy_cred(struct svc_cred *target, struct svc_cred *source)
+static int copy_cred(struct svc_cred *target, struct svc_cred *source)
 {
+	if (source->cr_principal) {
+		target->cr_principal =
+				kstrdup(source->cr_principal, GFP_KERNEL);
+		if (target->cr_principal == NULL)
+			return -ENOMEM;
+	} else
+		target->cr_principal = NULL;
+	target->cr_flavor = source->cr_flavor;
 	target->cr_uid = source->cr_uid;
 	target->cr_gid = source->cr_gid;
 	target->cr_group_info = source->cr_group_info;
 	get_group_info(target->cr_group_info);
+	return 0;
 }
 
 static int same_name(const char *n1, const char *n2)
···
 	return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id);
 }
 
-/* XXX what about NGROUP */
+static bool groups_equal(struct group_info *g1, struct group_info *g2)
+{
+	int i;
+
+	if (g1->ngroups != g2->ngroups)
+		return false;
+	for (i=0; i<g1->ngroups; i++)
+		if (GROUP_AT(g1, i) != GROUP_AT(g2, i))
+			return false;
+	return true;
+}
+
 static int
 same_creds(struct svc_cred *cr1, struct svc_cred *cr2)
 {
-	return cr1->cr_uid == cr2->cr_uid;
+	if ((cr1->cr_flavor != cr2->cr_flavor)
+		|| (cr1->cr_uid != cr2->cr_uid)
+		|| (cr1->cr_gid != cr2->cr_gid)
+		|| !groups_equal(cr1->cr_group_info, cr2->cr_group_info))
+		return false;
+	if (cr1->cr_principal == cr2->cr_principal)
+		return true;
+	if (!cr1->cr_principal || !cr2->cr_principal)
+		return false;
+	return 0 == strcmp(cr1->cr_principal, cr1->cr_principal);
 }
 
 static void gen_clid(struct nfs4_client *clp)
···
 {
 	struct nfs4_client *clp;
 	struct sockaddr *sa = svc_addr(rqstp);
-	char *princ;
+	int ret;
 
 	clp = alloc_client(name);
 	if (clp == NULL)
 		return NULL;
 
 	INIT_LIST_HEAD(&clp->cl_sessions);
-
-	princ = svc_gss_principal(rqstp);
-	if (princ) {
-		clp->cl_principal = kstrdup(princ, GFP_KERNEL);
-		if (clp->cl_principal == NULL) {
-			spin_lock(&client_lock);
-			free_client(clp);
-			spin_unlock(&client_lock);
-			return NULL;
-		}
+	ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred);
+	if (ret) {
+		spin_lock(&client_lock);
+		free_client(clp);
+		spin_unlock(&client_lock);
+		return NULL;
 	}
-
 	idr_init(&clp->cl_stateids);
 	memcpy(clp->cl_recdir, recdir, HEXDIR_LEN);
 	atomic_set(&clp->cl_refcount, 0);
···
 	rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table");
 	copy_verf(clp, verf);
 	rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
-	clp->cl_flavor = rqstp->rq_flavor;
-	copy_cred(&clp->cl_cred, &rqstp->rq_cred);
 	gen_confirm(clp);
 	clp->cl_cb_session = NULL;
 	return clp;
···
 	clid->flags = new->cl_exchange_flags;
 }
 
+static bool client_has_state(struct nfs4_client *clp)
+{
+	/*
+	 * Note clp->cl_openowners check isn't quite right: there's no
+	 * need to count owners without stateid's.
+	 *
+	 * Also note we should probably be using this in 4.0 case too.
+	 */
+	return !list_empty(&clp->cl_openowners)
+		|| !list_empty(&clp->cl_delegations)
+		|| !list_empty(&clp->cl_sessions);
+}
+
 __be32
 nfsd4_exchange_id(struct svc_rqst *rqstp,
 		  struct nfsd4_compound_state *cstate,
 		  struct nfsd4_exchange_id *exid)
 {
 	struct nfs4_client *unconf, *conf, *new;
-	int status;
+	__be32 status;
 	unsigned int		strhashval;
 	char			dname[HEXDIR_LEN];
 	char			addr_str[INET6_ADDRSTRLEN];
 	nfs4_verifier		verf = exid->verifier;
 	struct sockaddr		*sa = svc_addr(rqstp);
+	bool	update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A;
 
 	rpc_ntop(sa, addr_str, sizeof(addr_str));
 	dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p "
···
 	status = nfs4_make_rec_clidname(dname, &exid->clname);
 
 	if (status)
-		goto error;
+		return status;
 
 	strhashval = clientstr_hashval(dname);
 
+	/* Cases below refer to rfc 5661 section 18.35.4: */
 	nfs4_lock_state();
-	status = nfs_ok;
-
 	conf = find_confirmed_client_by_str(dname, strhashval);
 	if (conf) {
-		if (!clp_used_exchangeid(conf)) {
-			status = nfserr_clid_inuse; /* XXX: ? */
-			goto out;
-		}
-		if (!same_verf(&verf, &conf->cl_verifier)) {
-			/* 18.35.4 case 8 */
-			if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
-				status = nfserr_not_same;
+		bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred);
+		bool verfs_match = same_verf(&verf, &conf->cl_verifier);
+
+		if (update) {
+			if (!clp_used_exchangeid(conf)) { /* buggy client */
+				status = nfserr_inval;
 				goto out;
 			}
-			/* Client reboot: destroy old state */
-			expire_client(conf);
-			goto out_new;
-		}
-		if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) {
-			/* 18.35.4 case 9 */
-			if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+			if (!creds_match) { /* case 9 */
 				status = nfserr_perm;
 				goto out;
 			}
+			if (!verfs_match) { /* case 8 */
+				status = nfserr_not_same;
+				goto out;
+			}
+			/* case 6 */
+			exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
+			new = conf;
+			goto out_copy;
+		}
+		if (!creds_match) { /* case 3 */
+			if (client_has_state(conf)) {
+				status = nfserr_clid_inuse;
+				goto out;
+			}
 			expire_client(conf);
 			goto out_new;
 		}
-		/*
-		 * Set bit when the owner id and verifier map to an already
-		 * confirmed client id (18.35.3).
-		 */
-		exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
-
-		/*
-		 * Falling into 18.35.4 case 2, possible router replay.
-		 * Leave confirmed record intact and return same result.
-		 */
-		copy_verf(conf, &verf);
-		new = conf;
-		goto out_copy;
+		if (verfs_match) { /* case 2 */
+			conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
+			new = conf;
+			goto out_copy;
+		}
+		/* case 5, client reboot */
+		goto out_new;
 	}
 
-	/* 18.35.4 case 7 */
-	if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) {
+	if (update) { /* case 7 */
 		status = nfserr_noent;
 		goto out;
 	}
 
 	unconf  = find_unconfirmed_client_by_str(dname, strhashval);
-	if (unconf) {
-		/*
-		 * Possible retry or client restart.  Per 18.35.4 case 4,
-		 * a new unconfirmed record should be generated regardless
-		 * of whether any properties have changed.
-		 */
+	if (unconf) /* case 4, possible retry or client restart */
 		expire_client(unconf);
-	}
 
+	/* case 1 (normal case) */
 out_new:
-	/* Normal case */
 	new = create_client(exid->clname, dname, rqstp, &verf);
 	if (new == NULL) {
 		status = nfserr_jukebox;
···
 	exid->clientid.cl_boot = new->cl_clientid.cl_boot;
 	exid->clientid.cl_id = new->cl_clientid.cl_id;
 
-	exid->seqid = 1;
+	exid->seqid = new->cl_cs_slot.sl_seqid + 1;
 	nfsd4_set_ex_flags(new, exid);
 
 	dprintk("nfsd4_exchange_id seqid %d flags %x\n",
···
 
 out:
 	nfs4_unlock_state();
-error:
-	dprintk("nfsd4_exchange_id returns %d\n", ntohl(status));
 	return status;
 }
 
-static int
+static __be32
 check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse)
 {
 	dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid,
···
  */
 static void
 nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses,
-			   struct nfsd4_clid_slot *slot, int nfserr)
+			   struct nfsd4_clid_slot *slot, __be32 nfserr)
 {
 	slot->sl_status = nfserr;
 	memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses));
···
 				/* seqid, slotID, slotID, slotID, status */ \
 			5 ) * sizeof(__be32))
 
-static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel)
+static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel)
 {
 	return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ
 		|| fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ;
···
 	struct nfsd4_session *new;
 	struct nfsd4_clid_slot *cs_slot = NULL;
 	bool confirm_me = false;
-	int status = 0;
+	__be32 status = 0;
 
 	if (cr_ses->flags & ~SESSION4_FLAG_MASK_A)
 		return nfserr_inval;
···
 		cs_slot = &conf->cl_cs_slot;
 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
 		if (status == nfserr_replay_cache) {
-			dprintk("Got a create_session replay! seqid= %d\n",
-				cs_slot->sl_seqid);
-			/* Return the cached reply status */
 			status = nfsd4_replay_create_session(cr_ses, cs_slot);
 			goto out;
 		} else if (cr_ses->seqid != cs_slot->sl_seqid + 1) {
 			status = nfserr_seq_misordered;
-			dprintk("Sequence misordered!\n");
-			dprintk("Expected seqid= %d but got seqid= %d\n",
-				cs_slot->sl_seqid, cr_ses->seqid);
 			goto out;
 		}
 	} else if (unconf) {
···
 			status = nfserr_clid_inuse;
 			goto out;
 		}
-
 		cs_slot = &unconf->cl_cs_slot;
 		status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0);
 		if (status) {
···
 			status = nfserr_seq_misordered;
 			goto out;
 		}
-
 		confirm_me = true;
 		conf = unconf;
 	} else {
···
 
 	/* cache solo and embedded create sessions under the state lock */
 	nfsd4_cache_create_session(cr_ses, cs_slot, status);
-	if (confirm_me)
+	if (confirm_me) {
+		unsigned int hash = clientstr_hashval(unconf->cl_recdir);
+		struct nfs4_client *old =
+			find_confirmed_client_by_str(conf->cl_recdir, hash);
+		if (old)
+			expire_client(old);
 		move_to_confirmed(conf);
+	}
 out:
 	nfs4_unlock_state();
 	dprintk("%s returns %d\n", __func__, ntohl(status));
···
 		      struct nfsd4_destroy_session *sessionid)
 {
 	struct nfsd4_session *ses;
-	u32 status = nfserr_badsession;
+	__be32 status = nfserr_badsession;
 
 	/* Notes:
 	 * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid
···
 	struct nfsd4_session *session;
 	struct nfsd4_slot *slot;
 	struct nfsd4_conn *conn;
-	int status;
+	__be32 status;
 
 	if (resp->opcnt != 1)
 		return nfserr_sequence_pos;
···
 	return status;
 }
 
-static inline bool has_resources(struct nfs4_client *clp)
-{
-	return !list_empty(&clp->cl_openowners)
-		|| !list_empty(&clp->cl_delegations)
-		|| !list_empty(&clp->cl_sessions);
-}
-
 __be32
 nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc)
 {
 	struct nfs4_client *conf, *unconf, *clp;
-	int status = 0;
+	__be32 status = 0;
 
 	nfs4_lock_state();
 	unconf = find_unconfirmed_client(&dc->clientid);
···
 	if (conf) {
 		clp = conf;
 
-		if (!is_client_expired(conf) && has_resources(conf)) {
+		if (!is_client_expired(conf) && client_has_state(conf)) {
 			status = nfserr_clientid_busy;
 			goto out;
 		}
···
 __be32
 nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc)
 {
-	int status = 0;
+	__be32 status = 0;
 
 	if (rc->rca_one_fs) {
 		if (!cstate->current_fh.fh_dentry)
···
 	if (status)
 		return status;
 
-	/* 
-	 * XXX The Duplicate Request Cache (DRC) has been checked (??)
-	 * We get here on a DRC miss.
-	 */
-
 	strhashval = clientstr_hashval(dname);
 
+	/* Cases below refer to rfc 3530 section 14.2.33: */
 	nfs4_lock_state();
 	conf = find_confirmed_client_by_str(dname, strhashval);
 	if (conf) {
-		/* RFC 3530 14.2.33 CASE 0: */
+		/* case 0: */
 		status = nfserr_clid_inuse;
 		if (clp_used_exchangeid(conf))
 			goto out;
···
 			goto out;
 		}
 	}
-	/*
-	 * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
-	 * has a description of SETCLIENTID request processing consisting
-	 * of 5 bullet points, labeled as CASE0 - CASE4 below.
-	 */
 	unconf = find_unconfirmed_client_by_str(dname, strhashval);
-	status = nfserr_jukebox;
-	if (!conf) {
-		/*
-		 * RFC 3530 14.2.33 CASE 4:
-		 * placed first, because it is the normal case
-		 */
-		if (unconf)
-			expire_client(unconf);
-		new = create_client(clname, dname, rqstp, &clverifier);
-		if (new == NULL)
-			goto out;
-		gen_clid(new);
-	} else if (same_verf(&conf->cl_verifier, &clverifier)) {
-		/*
-		 * RFC 3530 14.2.33 CASE 1:
-		 * probable callback update
-		 */
-		if (unconf) {
-			/* Note this is removing unconfirmed {*x***},
-			 * which is stronger than RFC recommended {vxc**}.
-			 * This has the advantage that there is at most
-			 * one {*x***} in either list at any time.
-			 */
-			expire_client(unconf);
-		}
-		new = create_client(clname, dname, rqstp, &clverifier);
-		if (new == NULL)
-			goto out;
-		copy_clid(new, conf);
-	} else if (!unconf) {
-		/*
-		 * RFC 3530 14.2.33 CASE 2:
-		 * probable client reboot; state will be removed if
-		 * confirmed.
-		 */
-		new = create_client(clname, dname, rqstp, &clverifier);
-		if (new == NULL)
-			goto out;
-		gen_clid(new);
-	} else {
-		/*
-		 * RFC 3530 14.2.33 CASE 3:
-		 * probable client reboot; state will be removed if
-		 * confirmed.
-		 */
+	if (unconf)
 		expire_client(unconf);
-		new = create_client(clname, dname, rqstp, &clverifier);
-		if (new == NULL)
-			goto out;
+	status = nfserr_jukebox;
+	new = create_client(clname, dname, rqstp, &clverifier);
+	if (new == NULL)
+		goto out;
+	if (conf && same_verf(&conf->cl_verifier, &clverifier))
+		/* case 1: probable callback update */
+		copy_clid(new, conf);
+	else /* case 4 (new client) or cases 2, 3 (client reboot): */
 		gen_clid(new);
-	}
 	/*
 	 * XXX: we should probably set this at creation time, and check
 	 * for consistent minorversion use throughout:
···
 }
 
 
-/*
- * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
- * a description of SETCLIENTID_CONFIRM request processing consisting of 4
- * bullets, labeled as CASE1 - CASE4 below.
- */
 __be32
 nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
 			 struct nfsd4_compound_state *cstate,
 			 struct nfsd4_setclientid_confirm *setclientid_confirm)
 {
-	struct sockaddr *sa = svc_addr(rqstp);
 	struct nfs4_client *conf, *unconf;
 	nfs4_verifier confirm = setclientid_confirm->sc_confirm; 
 	clientid_t * clid = &setclientid_confirm->sc_clientid;
···
 
 	if (STALE_CLIENTID(clid))
 		return nfserr_stale_clientid;
-	/* 
-	 * XXX The Duplicate Request Cache (DRC) has been checked (??)
-	 * We get here on a DRC miss.
-	 */
-
 	nfs4_lock_state();
 
 	conf = find_confirmed_client(clid);
 	unconf = find_unconfirmed_client(clid);
-
-	status = nfserr_clid_inuse;
-	if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa))
-		goto out;
-	if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa))
-		goto out;
-
 	/*
-	 * section 14.2.34 of RFC 3530 has a description of
-	 * SETCLIENTID_CONFIRM request processing consisting
-	 * of 4 bullet points, labeled as CASE1 - CASE4 below.
+	 * We try hard to give out unique clientid's, so if we get an
+	 * attempt to confirm the same clientid with a different cred,
+	 * there's a bug somewhere.  Let's charitably assume it's our
+	 * bug.
 	 */
-	if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) {
-		/*
-		 * RFC 3530 14.2.34 CASE 1:
-		 * callback update
-		 */
-		if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
-			status = nfserr_clid_inuse;
-		else {
-			nfsd4_change_callback(conf, &unconf->cl_cb_conn);
-			nfsd4_probe_callback(conf);
-			expire_client(unconf);
+	status = nfserr_serverfault;
+	if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred))
+		goto out;
+	if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred))
+		goto out;
+	/* cases below refer to rfc 3530 section 14.2.34: */
+	if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
+		if (conf && !unconf) /* case 2: probable retransmit */
 			status = nfs_ok;
+		else /* case 4: client hasn't noticed we rebooted yet? */
+			status = nfserr_stale_clientid;
+		goto out;
+	}
+	status = nfs_ok;
+	if (conf) { /* case 1: callback update */
+		nfsd4_change_callback(conf, &unconf->cl_cb_conn);
+		nfsd4_probe_callback(conf);
+		expire_client(unconf);
+	} else { /* case 3: normal case; new or rebooted client */
+		unsigned int hash = clientstr_hashval(unconf->cl_recdir);
 
+		conf = find_confirmed_client_by_str(unconf->cl_recdir, hash);
+		if (conf) {
+			nfsd4_client_record_remove(conf);
+			expire_client(conf);
 		}
-	} else if (conf && !unconf) {
-		/*
-		 * RFC 3530 14.2.34 CASE 2:
-		 * probable retransmitted request; play it safe and
-		 * do nothing.
-		 */
-		if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
-			status = nfserr_clid_inuse;
-		else
-			status = nfs_ok;
-	} else if (!conf && unconf
-			&& same_verf(&unconf->cl_confirm, &confirm)) {
-		/*
-		 * RFC 3530 14.2.34 CASE 3:
-		 * Normal case; new or rebooted client:
-		 */
-		if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
-			status = nfserr_clid_inuse;
-		} else {
-			unsigned int hash =
-				clientstr_hashval(unconf->cl_recdir);
-			conf = find_confirmed_client_by_str(unconf->cl_recdir,
-							    hash);
-			if (conf) {
-				nfsd4_client_record_remove(conf);
-				expire_client(conf);
-			}
-			move_to_confirmed(unconf);
-			conf = unconf;
-			nfsd4_probe_callback(conf);
-			status = nfs_ok;
-		}
-	} else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
-	    && (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
-				    				&confirm)))) {
-		/*
-		 * RFC 3530 14.2.34 CASE 4:
-		 * Client probably hasn't noticed that we rebooted yet.
-		 */
-		status = nfserr_stale_clientid;
-	} else {
-		/* check that we have hit one of the cases...*/
-		status = nfserr_clid_inuse;
+		move_to_confirmed(unconf);
+		nfsd4_probe_callback(unconf);
 	}
 out:
 	nfs4_unlock_state();
···
 	stp->st_file = fp;
 	stp->st_access_bmap = 0;
 	stp->st_deny_bmap = 0;
-	__set_bit(open->op_share_access, &stp->st_access_bmap);
-	__set_bit(open->op_share_deny, &stp->st_deny_bmap);
+	set_access(open->op_share_access, stp);
+	set_deny(open->op_share_deny, stp);
 	stp->st_openstp = NULL;
 }
 
···
 	ret = nfserr_locked;
 	/* Search for conflicting share reservations */
 	list_for_each_entry(stp, &fp->fi_stateids, st_perfile) {
-		if (test_bit(deny_type, &stp->st_deny_bmap) ||
-		    test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap))
+		if (test_deny(deny_type, stp) ||
+		    test_deny(NFS4_SHARE_DENY_BOTH, stp))
 			goto out;
 	}
 	ret = nfs_ok;
···
 	bool new_access;
 	__be32 status;
 
-	new_access = !test_bit(op_share_access, &stp->st_access_bmap);
+	new_access = !test_access(op_share_access, stp);
 	if (new_access) {
 		status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open);
 		if (status)
···
 		return status;
 	}
 	/* remember the open */
-	__set_bit(op_share_access, &stp->st_access_bmap);
-	__set_bit(open->op_share_deny, &stp->st_deny_bmap);
+	set_access(op_share_access, stp);
+	set_deny(open->op_share_deny, stp);
 
 	return nfs_ok;
 }
···
 }
 
 static inline int
-access_permit_read(unsigned long access_bmap)
+access_permit_read(struct nfs4_ol_stateid *stp)
 {
-	return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) ||
-		test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) ||
-		test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap);
+	return test_access(NFS4_SHARE_ACCESS_READ, stp) ||
+		test_access(NFS4_SHARE_ACCESS_BOTH, stp) ||
+		test_access(NFS4_SHARE_ACCESS_WRITE, stp);
 }
 
 static inline int
-access_permit_write(unsigned long access_bmap)
+access_permit_write(struct nfs4_ol_stateid *stp)
 {
-	return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) ||
-		test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap);
+	return test_access(NFS4_SHARE_ACCESS_WRITE, stp) ||
+		test_access(NFS4_SHARE_ACCESS_BOTH, stp);
 }
 
 static
···
 	/* For lock stateid's, we test the parent open, not the lock: */
 	if (stp->st_openstp)
 		stp = stp->st_openstp;
-	if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap)))
+	if ((flags & WR_STATE) && !access_permit_write(stp))
                 goto out;
-	if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap)))
+	if ((flags & RD_STATE) && !access_permit_read(stp))
                 goto out;
 	status = nfs_ok;
 out:
···
 	return (s32)a->si_generation - (s32)b->si_generation > 0;
 }
 
-static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
+static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session)
 {
 	/*
 	 * When sessions are used the stateid generation number is ignored
···
 
 static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access)
 {
-	if (!test_bit(access, &stp->st_access_bmap))
+	if (!test_access(access, stp))
 		return;
 	nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access));
-	__clear_bit(access, &stp->st_access_bmap);
+	clear_access(access, stp);
 }
 
 static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access)
···
 }
 
 static void
-reset_union_bmap_deny(unsigned long deny, unsigned long *bmap)
+reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp)
 {
 	int i;
 	for (i = 0; i < 4; i++) {
 		if ((i & deny) != i)
-			__clear_bit(i, bmap);
+			clear_deny(i, stp);
 	}
 }
 
···
 	if (status)
 		goto out; 
 	status = nfserr_inval;
-	if (!test_bit(od->od_share_access, &stp->st_access_bmap)) {
-		dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n",
+	if (!test_access(od->od_share_access, stp)) {
+		dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n",
 			stp->st_access_bmap, od->od_share_access);
 		goto out;
 	}
-	if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) {
+	if (!test_deny(od->od_share_deny, stp)) {
 		dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n",
 			stp->st_deny_bmap, od->od_share_deny);
 		goto out;
 	}
 	nfs4_stateid_downgrade(stp, od->od_share_access);
 
-	reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap);
+	reset_union_bmap_deny(od->od_share_deny, stp);
 
 	update_stateid(&stp->st_stid.sc_stateid);
 	memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t));
···
 	struct nfs4_file *fp = lock_stp->st_file;
 	int oflag = nfs4_access_to_omode(access);
 
-	if (test_bit(access, &lock_stp->st_access_bmap))
+	if (test_access(access, lock_stp))
 		return;
 	nfs4_file_get_access(fp, oflag);
-	__set_bit(access, &lock_stp->st_access_bmap);
+	set_access(access, lock_stp);
 }
 
-__be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new)
+static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new)
 {
 	struct nfs4_file *fi = ost->st_file;
 	struct nfs4_openowner *oo = openowner(ost->st_stateowner);

fs/nfsd/nfs4xdr.c

···
 
 static void write32(__be32 **p, u32 n)
 {
-	*(*p)++ = n;
+	*(*p)++ = htonl(n);
 }
 
 static void write64(__be32 **p, u64 n)
 {
-	write32(p, (u32)(n >> 32));
+	write32(p, (n >> 32));
 	write32(p, (u32)n);
 }
 
···
 }
 
 /* Encode as an array of strings the string given with components
- * separated @sep.
+ * separated @sep, escaped with esc_enter and esc_exit.
  */
-static __be32 nfsd4_encode_components(char sep, char *components,
-				   __be32 **pp, int *buflen)
+static __be32 nfsd4_encode_components_esc(char sep, char *components,
+				   __be32 **pp, int *buflen,
+				   char esc_enter, char esc_exit)
 {
 	__be32 *p = *pp;
 	__be32 *countp = p;
 	int strlen, count=0;
-	char *str, *end;
+	char *str, *end, *next;
 
 	dprintk("nfsd4_encode_components(%s)\n", components);
 	if ((*buflen -= 4) < 0)
···
 	WRITE32(0); /* We will fill this in with @count later */
 	end = str = components;
 	while (*end) {
-		for (; *end && (*end != sep); end++)
-			; /* Point to end of component */
+		bool found_esc = false;
+
+		/* try to parse as esc_start, ..., esc_end, sep */
+		if (*str == esc_enter) {
+			for (; *end && (*end != esc_exit); end++)
+				/* find esc_exit or end of string */;
+			next = end + 1;
+			if (*end && (!*next || *next == sep)) {
+				str++;
+				found_esc = true;
+			}
+		}
+
+		if (!found_esc)
+			for (; *end && (*end != sep); end++)
+				/* find sep or end of string */;
+
 		strlen = end - str;
 		if (strlen) {
 			if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
···
 	return 0;
 }
 
+/* Encode as an array of strings the string given with components
+ * separated @sep.
+ */
+static __be32 nfsd4_encode_components(char sep, char *components,
+				   __be32 **pp, int *buflen)
+{
+	return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
+}
+
 /*
  * encode a location element of a fs_locations structure
  */
···
 	__be32 status;
 	__be32 *p = *pp;
 
-	status = nfsd4_encode_components(':', location->hosts, &p, buflen);
+	status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
+						'[', ']');
 	if (status)
 		return status;
 	status = nfsd4_encode_components('/', location->path, &p, buflen);
···
 }
 
 static __be32
-nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
 			 struct nfsd4_exchange_id *exid)
 {
 	__be32 *p;
···
 }
 
 static __be32
-nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
 			    struct nfsd4_create_session *sess)
 {
 	__be32 *p;
···
 }
 
 static __be32
-nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
 			     struct nfsd4_destroy_session *destroy_session)
 {
 	return nfserr;
 }
 
 static __be32
-nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
 			  struct nfsd4_free_stateid *free_stateid)
 {
 	__be32 *p;
···
 		return nfserr;
 
 	RESERVE_SPACE(4);
-	WRITE32(nfserr);
+	*p++ = nfserr;
 	ADJUST_ARGS();
 	return nfserr;
 }
 
 static __be32
-nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
+nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
 		      struct nfsd4_sequence *seq)
 {
 	__be32 *p;
···
 	return 0;
 }
 
-__be32
-nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
+static __be32
+nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
 			  struct nfsd4_test_stateid *test_stateid)
 {
 	struct nfsd4_test_stateid_id *stateid, *next;
···
  * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
  * will be at least a page and will therefore hold the xdr_buf head.
  */
-int nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
+__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
 {
 	struct xdr_buf *xb = &resp->rqstp->rq_res;
 	struct nfsd4_session *session = NULL;

fs/nfsd/nfsctl.c

···
 {
 	char *mesg = buf;
 	int fd, err;
+	struct net *net = &init_net;
 
 	err = get_int(&mesg, &fd);
 	if (err != 0 || fd < 0)
···
 
 	err = svc_addsock(nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
 	if (err < 0) {
+		if (nfsd_serv->sv_nrthreads == 1)
+			svc_shutdown_net(nfsd_serv, net);
 		svc_destroy(nfsd_serv);
 		return err;
 	}
···
 	char transport[16];
 	struct svc_xprt *xprt;
 	int port, err;
+	struct net *net = &init_net;
 
 	if (sscanf(buf, "%15s %4u", transport, &port) != 2)
 		return -EINVAL;
···
 	if (err != 0)
 		return err;
 
-	err = svc_create_xprt(nfsd_serv, transport, &init_net,
+	err = svc_create_xprt(nfsd_serv, transport, net,
 				PF_INET, port, SVC_SOCK_ANONYMOUS);
 	if (err < 0)
 		goto out_err;
 
-	err = svc_create_xprt(nfsd_serv, transport, &init_net,
+	err = svc_create_xprt(nfsd_serv, transport, net,
 				PF_INET6, port, SVC_SOCK_ANONYMOUS);
 	if (err < 0 && err != -EAFNOSUPPORT)
 		goto out_close;
···
 	nfsd_serv->sv_nrthreads--;
 	return 0;
 out_close:
-	xprt = svc_find_xprt(nfsd_serv, transport, &init_net, PF_INET, port);
+	xprt = svc_find_xprt(nfsd_serv, transport, net, PF_INET, port);
 	if (xprt != NULL) {
 		svc_close_xprt(xprt);
 		svc_xprt_put(xprt);
 	}
 out_err:
+	if (nfsd_serv->sv_nrthreads == 1)
+		svc_shutdown_net(nfsd_serv, net);
 	svc_destroy(nfsd_serv);
 	return err;
 }

fs/nfsd/nfssvc.c

···
 #include <linux/module.h>
 #include <linux/fs_struct.h>
 #include <linux/swap.h>
+#include <linux/nsproxy.h>
 
 #include <linux/sunrpc/stats.h>
 #include <linux/sunrpc/svcsock.h>
···
 
 int nfsd_create_serv(void)
 {
+	int error;
+
 	WARN_ON(!mutex_is_locked(&nfsd_mutex));
 	if (nfsd_serv) {
 		svc_get(nfsd_serv);
···
 				      nfsd_last_thread, nfsd, THIS_MODULE);
 	if (nfsd_serv == NULL)
 		return -ENOMEM;
+
+	error = svc_bind(nfsd_serv, current->nsproxy->net_ns);
+	if (error < 0) {
+		svc_destroy(nfsd_serv);
+		return error;
+	}
 
 	set_max_drc();
 	do_gettimeofday(&nfssvc_boot);		/* record boot time */
···
 	int i = 0;
 	int tot = 0;
 	int err = 0;
+	struct net *net = &init_net;
 
 	WARN_ON(!mutex_is_locked(&nfsd_mutex));
 
···
 		if (err)
 			break;
 	}
+
+	if (nfsd_serv->sv_nrthreads == 1)
+		svc_shutdown_net(nfsd_serv, net);
 	svc_destroy(nfsd_serv);
 
 	return err;
···
 {
 	int	error;
 	bool	nfsd_up_before;
+	struct net *net = &init_net;
 
 	mutex_lock(&nfsd_mutex);
 	dprintk("nfsd: creating service\n");
···
 	if (error < 0 && !nfsd_up_before)
 		nfsd_shutdown();
 out_destroy:
+	if (nfsd_serv->sv_nrthreads == 1)
+		svc_shutdown_net(nfsd_serv, net);
 	svc_destroy(nfsd_serv);		/* Release server */
 out:
 	mutex_unlock(&nfsd_mutex);
···
 	nfsdstats.th_cnt --;
 
 out:
+	if (rqstp->rq_server->sv_nrthreads == 1)
+		svc_shutdown_net(rqstp->rq_server, &init_net);
+
 	/* Release the thread */
 	svc_exit_thread(rqstp);
 
···
 int nfsd_pool_stats_release(struct inode *inode, struct file *file)
 {
 	int ret = seq_release(inode, file);
+	struct net *net = &init_net;
+
 	mutex_lock(&nfsd_mutex);
 	/* this function really, really should have been called svc_put() */
+	if (nfsd_serv->sv_nrthreads == 1)
+		svc_shutdown_net(nfsd_serv, net);
 	svc_destroy(nfsd_serv);
 	mutex_unlock(&nfsd_mutex);
 	return ret;

fs/nfsd/state.h

···
 	time_t                  cl_time;        /* time of last lease renewal */
 	struct sockaddr_storage	cl_addr; 	/* client ipaddress */
 	u32			cl_flavor;	/* setclientid pseudoflavor */
-	char			*cl_principal;	/* setclientid principal name */
 	struct svc_cred		cl_cred; 	/* setclientid principal */
 	clientid_t		cl_clientid;	/* generated by server */
 	nfs4_verifier		cl_confirm;	/* generated by server */

fs/nfsd/xdr4.h

···
 	__be32			*datap;
 	size_t			iovlen;
 	u32			minorversion;
-	u32			status;
+	__be32			status;
 	stateid_t	current_stateid;
 	stateid_t	save_stateid;
 	/* to indicate current and saved state id presents */
···
 };
 
 struct nfsd4_test_stateid {
-	__be32		ts_num_ids;
+	u32		ts_num_ids;
 	struct list_head ts_stateid_list;
 };
 
···
 		struct nfsd4_compoundargs *);
 int nfs4svc_encode_compoundres(struct svc_rqst *, __be32 *,
 		struct nfsd4_compoundres *);
-int nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
+__be32 nfsd4_check_resp_size(struct nfsd4_compoundres *, u32);
 void nfsd4_encode_operation(struct nfsd4_compoundres *, struct nfsd4_op *);
 void nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op);
 __be32 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,

include/linux/sunrpc/svc.h

···
 	struct svc_pool *	rq_pool;	/* thread pool */
 	struct svc_procedure *	rq_procinfo;	/* procedure info */
 	struct auth_ops *	rq_authop;	/* authentication flavour */
-	u32			rq_flavor;	/* pseudoflavor */
 	struct svc_cred		rq_cred;	/* auth info */
 	void *			rq_xprt_ctxt;	/* transport specific context ptr */
 	struct svc_deferred_req*rq_deferred;	/* deferred request we are replaying */
···
  */
 int svc_rpcb_setup(struct svc_serv *serv, struct net *net);
 void svc_rpcb_cleanup(struct svc_serv *serv, struct net *net);
+int svc_bind(struct svc_serv *serv, struct net *net);
 struct svc_serv *svc_create(struct svc_program *, unsigned int,
 			    void (*shutdown)(struct svc_serv *, struct net *net));
 struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,

include/linux/sunrpc/svcauth.h

···
 #include <linux/sunrpc/msg_prot.h>
 #include <linux/sunrpc/cache.h>
 #include <linux/hash.h>
+#include <linux/cred.h>
 
 struct svc_cred {
 	uid_t			cr_uid;
 	gid_t			cr_gid;
 	struct group_info	*cr_group_info;
+	u32			cr_flavor; /* pseudoflavor */
+	char			*cr_principal; /* for gss */
 };
+
+static inline void free_svc_cred(struct svc_cred *cred)
+{
+	if (cred->cr_group_info)
+		put_group_info(cred->cr_group_info);
+	kfree(cred->cr_principal);
+}
 
 struct svc_rqst;		/* forward decl */
 struct in6_addr;

include/linux/sunrpc/svcauth_gss.h

···
 void gss_svc_shutdown_net(struct net *net);
 int svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name);
 u32 svcauth_gss_flavor(struct auth_domain *dom);
-char *svc_gss_principal(struct svc_rqst *);
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_SUNRPC_SVCAUTH_GSS_H */

net/sunrpc/auth_gss/gss_krb5_wrap.c

···
 }
 
 /*
- * We cannot currently handle tokens with rotated data.  We need a
- * generalized routine to rotate the data in place.  It is anticipated
- * that we won't encounter rotated data in the general case.
+ * We can shift data by up to LOCAL_BUF_LEN bytes in a pass.  If we need
+ * to do more than that, we shift repeatedly.  Kevin Coffman reports
+ * seeing 28 bytes as the value used by Microsoft clients and servers
+ * with AES, so this constant is chosen to allow handling 28 in one pass
+ * without using too much stack space.
+ *
+ * If that proves to a problem perhaps we could use a more clever
+ * algorithm.
  */
-static u32
-rotate_left(struct krb5_ctx *kctx, u32 offset, struct xdr_buf *buf, u16 rrc)
+#define LOCAL_BUF_LEN 32u
+
+static void rotate_buf_a_little(struct xdr_buf *buf, unsigned int shift)
 {
-	unsigned int realrrc = rrc % (buf->len - offset - GSS_KRB5_TOK_HDR_LEN);
+	char head[LOCAL_BUF_LEN];
+	char tmp[LOCAL_BUF_LEN];
+	unsigned int this_len, i;
 
-	if (realrrc == 0)
-		return 0;
+	BUG_ON(shift > LOCAL_BUF_LEN);
 
-	dprintk("%s: cannot process token with rotated data: "
-		"rrc %u, realrrc %u\n", __func__, rrc, realrrc);
-	return 1;
+	read_bytes_from_xdr_buf(buf, 0, head, shift);
+	for (i = 0; i + shift < buf->len; i += LOCAL_BUF_LEN) {
+		this_len = min(LOCAL_BUF_LEN, buf->len - (i + shift));
+		read_bytes_from_xdr_buf(buf, i+shift, tmp, this_len);
+		write_bytes_to_xdr_buf(buf, i, tmp, this_len);
+	}
+	write_bytes_to_xdr_buf(buf, buf->len - shift, head, shift);
+}
+
+static void _rotate_left(struct xdr_buf *buf, unsigned int shift)
+{
+	int shifted = 0;
+	int this_shift;
+
+	shift %= buf->len;
+	while (shifted < shift) {
+		this_shift = min(shift - shifted, LOCAL_BUF_LEN);
+		rotate_buf_a_little(buf, this_shift);
+		shifted += this_shift;
+	}
+}
+
+static void rotate_left(u32 base, struct xdr_buf *buf, unsigned int shift)
+{
+	struct xdr_buf subbuf;
+
+	xdr_buf_subsegment(buf, &subbuf, base, buf->len - base);
+	_rotate_left(&subbuf, shift);
 }
 
 static u32
···
 
 	seqnum = be64_to_cpup((__be64 *)(ptr + 8));
 
-	if (rrc != 0) {
-		err = rotate_left(kctx, offset, buf, rrc);
-		if (err)
-			return GSS_S_FAILURE;
-	}
+	if (rrc != 0)
+		rotate_left(offset + 16, buf, rrc);
 
 	err = (*kctx->gk5e->decrypt_v2)(kctx, offset, buf,
 					&headskip, &tailskip);

net/sunrpc/auth_gss/svcauth_gss.c

···
 	struct svc_cred		cred;
 	struct gss_svc_seq_data	seqdata;
 	struct gss_ctx		*mechctx;
-	char			*client_name;
 };
 
 static struct rsc *rsc_update(struct cache_detail *cd, struct rsc *new, struct rsc *old);
···
 	kfree(rsci->handle.data);
 	if (rsci->mechctx)
 		gss_delete_sec_context(&rsci->mechctx);
-	if (rsci->cred.cr_group_info)
-		put_group_info(rsci->cred.cr_group_info);
-	kfree(rsci->client_name);
+	free_svc_cred(&rsci->cred);
 }
 
 static void rsc_put(struct kref *ref)
···
 	tmp->handle.data = NULL;
 	new->mechctx = NULL;
 	new->cred.cr_group_info = NULL;
-	new->client_name = NULL;
+	new->cred.cr_principal = NULL;
 }
 
 static void
···
 	spin_lock_init(&new->seqdata.sd_lock);
 	new->cred = tmp->cred;
 	tmp->cred.cr_group_info = NULL;
-	new->client_name = tmp->client_name;
-	tmp->client_name = NULL;
+	new->cred.cr_principal = tmp->cred.cr_principal;
+	tmp->cred.cr_principal = NULL;
 }
 
 static struct cache_head *
···
 		/* get client name */
 		len = qword_get(&mesg, buf, mlen);
 		if (len > 0) {
-			rsci.client_name = kstrdup(buf, GFP_KERNEL);
-			if (!rsci.client_name)
+			rsci.cred.cr_principal = kstrdup(buf, GFP_KERNEL);
+			if (!rsci.cred.cr_principal)
 				goto out;
 		}
 
···
 	struct rsc			*rsci;
 };
 
-char *svc_gss_principal(struct svc_rqst *rqstp)
-{
-	struct gss_svc_data *gd = (struct gss_svc_data *)rqstp->rq_auth_data;
-
-	if (gd && gd->rsci)
-		return gd->rsci->client_name;
-	return NULL;
-}
-EXPORT_SYMBOL_GPL(svc_gss_principal);
-
 static int
 svcauth_gss_set_client(struct svc_rqst *rqstp)
 {
···
 		}
 		svcdata->rsci = rsci;
 		cache_get(&rsci->h);
-		rqstp->rq_flavor = gss_svc_to_pseudoflavor(
+		rqstp->rq_cred.cr_flavor = gss_svc_to_pseudoflavor(
 					rsci->mechctx->mech_type, gc->gc_svc);
 		ret = SVC_OK;
 		goto out;

net/sunrpc/rpcb_clnt.c

···
 	struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
 	struct rpc_clnt *clnt = sn->rpcb_local_clnt;
 	struct rpc_clnt *clnt4 = sn->rpcb_local_clnt4;
-	int shutdown;
+	int shutdown = 0;
 
 	spin_lock(&sn->rpcb_clnt_lock);
-	if (--sn->rpcb_users == 0) {
-		sn->rpcb_local_clnt = NULL;
-		sn->rpcb_local_clnt4 = NULL;
+	if (sn->rpcb_users) {
+		if (--sn->rpcb_users == 0) {
+			sn->rpcb_local_clnt = NULL;
+			sn->rpcb_local_clnt4 = NULL;
+		}
+		shutdown = !sn->rpcb_users;
 	}
-	shutdown = !sn->rpcb_users;
 	spin_unlock(&sn->rpcb_clnt_lock);
 
 	if (shutdown) {

net/sunrpc/svc.c

···
 	return 0;
 }
 
+int svc_bind(struct svc_serv *serv, struct net *net)
+{
+	if (!svc_uses_rpcbind(serv))
+		return 0;
+	return svc_rpcb_setup(serv, net);
+}
+EXPORT_SYMBOL_GPL(svc_bind);
+
 /*
  * Create an RPC service
  */
···
 		spin_lock_init(&pool->sp_lock);
 	}
 
-	if (svc_uses_rpcbind(serv)) {
-		if (svc_rpcb_setup(serv, current->nsproxy->net_ns) < 0) {
-			kfree(serv->sv_pools);
-			kfree(serv);
-			return NULL;
-		}
-		if (!serv->sv_shutdown)
-			serv->sv_shutdown = svc_rpcb_cleanup;
-	}
+	if (svc_uses_rpcbind(serv) && (!serv->sv_shutdown))
+		serv->sv_shutdown = svc_rpcb_cleanup;
 
 	return serv;
 }
···
 void
 svc_destroy(struct svc_serv *serv)
 {
-	struct net *net = current->nsproxy->net_ns;
-
 	dprintk("svc: svc_destroy(%s, %d)\n",
 				serv->sv_program->pg_name,
 				serv->sv_nrthreads);
···
 		printk("svc_destroy: no threads for serv=%p!\n", serv);
 
 	del_timer_sync(&serv->sv_temptimer);
-
-	svc_shutdown_net(serv, net);
 
 	/*
 	 * The last user is gone and thus all sockets have to be destroyed to

net/sunrpc/svc_xprt.c

···
 
 	/* now allocate needed pages.  If we get a failure, sleep briefly */
 	pages = (serv->sv_max_mesg + PAGE_SIZE) / PAGE_SIZE;
+	BUG_ON(pages >= RPCSVC_MAXPAGES);
 	for (i = 0; i < pages ; i++)
 		while (rqstp->rq_pages[i] == NULL) {
 			struct page *p = alloc_page(GFP_KERNEL);
···
 			rqstp->rq_pages[i] = p;
 		}
 	rqstp->rq_pages[i++] = NULL; /* this might be seen in nfs_read_actor */
-	BUG_ON(pages >= RPCSVC_MAXPAGES);
 
 	/* Make arg->head point to first page and arg->pages point to rest */
 	arg = &rqstp->rq_arg;
···
 	svc_clear_pools(serv, net);
 	/*
 	 * At this point the sp_sockets lists will stay empty, since
-	 * svc_enqueue will not add new entries without taking the
+	 * svc_xprt_enqueue will not add new entries without taking the
 	 * sp_lock and checking XPT_BUSY.
 	 */
 	svc_clear_list(&serv->sv_tempsocks, net);

net/sunrpc/svcauth_unix.c

···
 	struct svc_cred	*cred = &rqstp->rq_cred;
 
 	cred->cr_group_info = NULL;
+	cred->cr_principal = NULL;
 	rqstp->rq_client = NULL;
 
 	if (argv->iov_len < 3*4)
···
 	svc_putnl(resv, RPC_AUTH_NULL);
 	svc_putnl(resv, 0);
 
-	rqstp->rq_flavor = RPC_AUTH_NULL;
+	rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL;
 	return SVC_OK;
 }
 
···
 	int		len   = argv->iov_len;
 
 	cred->cr_group_info = NULL;
+	cred->cr_principal = NULL;
 	rqstp->rq_client = NULL;
 
 	if ((len -= 3*4) < 0)
···
 	svc_putnl(resv, RPC_AUTH_NULL);
 	svc_putnl(resv, 0);
 
-	rqstp->rq_flavor = RPC_AUTH_UNIX;
+	rqstp->rq_cred.cr_flavor = RPC_AUTH_UNIX;
 	return SVC_OK;
 
 badcred: