nfsd: Remove deprecated nfsctl system call and related code.

As promised in feature-removal-schedule.txt it is time to
remove the nfsctl system call.

Userspace has perferred to not use this call throughout 2.6 and it has been
excluded in the default configuration since 2.6.36 (9 months ago).

So this patch removes all the code that was being compiled out.

There are still references to sys_nfsctl in various arch systemcall tables
and related code. These should be cleaned out too, probably in the next
merge window.

Signed-off-by: NeilBrown <[e-mail]>
Signed-off-by: J. Bruce Fields <[e-mail]>

Documentation/feature-removal-schedule.txt

···
 
 ----------------------------
 
-What:   access to nfsd auth cache through sys_nfsservctl or '.' files
-        in the 'nfsd' filesystem.
-When:   2.6.40
-Why:    This is a legacy interface which have been replaced by a more
-        dynamic cache.  Continuing to maintain this interface is an
-        unnecessary burden.
-Who:    NeilBrown <[e-mail]>
-
-----------------------------
-
 What:	cancel_rearming_delayed_work[queue]()
 When:	2.6.39
 

arch/tile/configs/tilegx_defconfig

···
 CONFIG_NFS_USE_KERNEL_DNS=y
 # CONFIG_NFS_USE_NEW_IDMAPPER is not set
 CONFIG_NFSD=m
-CONFIG_NFSD_DEPRECATED=y
 CONFIG_NFSD_V2_ACL=y
 CONFIG_NFSD_V3=y
 CONFIG_NFSD_V3_ACL=y

fs/Makefile

···
 obj-$(CONFIG_AIO)               += aio.o
 obj-$(CONFIG_FILE_LOCKING)      += locks.o
 obj-$(CONFIG_COMPAT)		+= compat.o compat_ioctl.o
-obj-$(CONFIG_NFSD_DEPRECATED)	+= nfsctl.o
 obj-$(CONFIG_BINFMT_AOUT)	+= binfmt_aout.o
 obj-$(CONFIG_BINFMT_EM86)	+= binfmt_em86.o
 obj-$(CONFIG_BINFMT_MISC)	+= binfmt_misc.o

fs/compat.c

···
 }
 #endif /* HAVE_SET_RESTORE_SIGMASK */
 
-#if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && !defined(CONFIG_NFSD_DEPRECATED)
-/* Stuff for NFS server syscalls... */
-struct compat_nfsctl_svc {
-	u16			svc32_port;
-	s32			svc32_nthreads;
-};
-
-struct compat_nfsctl_client {
-	s8			cl32_ident[NFSCLNT_IDMAX+1];
-	s32			cl32_naddr;
-	struct in_addr		cl32_addrlist[NFSCLNT_ADDRMAX];
-	s32			cl32_fhkeytype;
-	s32			cl32_fhkeylen;
-	u8			cl32_fhkey[NFSCLNT_KEYMAX];
-};
-
-struct compat_nfsctl_export {
-	char		ex32_client[NFSCLNT_IDMAX+1];
-	char		ex32_path[NFS_MAXPATHLEN+1];
-	compat_dev_t	ex32_dev;
-	compat_ino_t	ex32_ino;
-	compat_int_t	ex32_flags;
-	__compat_uid_t	ex32_anon_uid;
-	__compat_gid_t	ex32_anon_gid;
-};
-
-struct compat_nfsctl_fdparm {
-	struct sockaddr		gd32_addr;
-	s8			gd32_path[NFS_MAXPATHLEN+1];
-	compat_int_t		gd32_version;
-};
-
-struct compat_nfsctl_fsparm {
-	struct sockaddr		gd32_addr;
-	s8			gd32_path[NFS_MAXPATHLEN+1];
-	compat_int_t		gd32_maxlen;
-};
-
-struct compat_nfsctl_arg {
-	compat_int_t		ca32_version;	/* safeguard */
-	union {
-		struct compat_nfsctl_svc	u32_svc;
-		struct compat_nfsctl_client	u32_client;
-		struct compat_nfsctl_export	u32_export;
-		struct compat_nfsctl_fdparm	u32_getfd;
-		struct compat_nfsctl_fsparm	u32_getfs;
-	} u;
-#define ca32_svc	u.u32_svc
-#define ca32_client	u.u32_client
-#define ca32_export	u.u32_export
-#define ca32_getfd	u.u32_getfd
-#define ca32_getfs	u.u32_getfs
-};
-
-union compat_nfsctl_res {
-	__u8			cr32_getfh[NFS_FHSIZE];
-	struct knfsd_fh		cr32_getfs;
-};
-
-static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
-				struct compat_nfsctl_arg __user *arg)
-{
-	if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
-		get_user(karg->ca_version, &arg->ca32_version) ||
-		__get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
-		__get_user(karg->ca_svc.svc_nthreads,
-				&arg->ca32_svc.svc32_nthreads))
-		return -EFAULT;
-	return 0;
-}
-
-static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
-				struct compat_nfsctl_arg __user *arg)
-{
-	if (!access_ok(VERIFY_READ, &arg->ca32_client,
-			sizeof(arg->ca32_client)) ||
-		get_user(karg->ca_version, &arg->ca32_version) ||
-		__copy_from_user(&karg->ca_client.cl_ident[0],
-				&arg->ca32_client.cl32_ident[0],
-				NFSCLNT_IDMAX) ||
-		__get_user(karg->ca_client.cl_naddr,
-				&arg->ca32_client.cl32_naddr) ||
-		__copy_from_user(&karg->ca_client.cl_addrlist[0],
-				&arg->ca32_client.cl32_addrlist[0],
-				(sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
-		__get_user(karg->ca_client.cl_fhkeytype,
-				&arg->ca32_client.cl32_fhkeytype) ||
-		__get_user(karg->ca_client.cl_fhkeylen,
-				&arg->ca32_client.cl32_fhkeylen) ||
-		__copy_from_user(&karg->ca_client.cl_fhkey[0],
-				&arg->ca32_client.cl32_fhkey[0],
-				NFSCLNT_KEYMAX))
-		return -EFAULT;
-
-	return 0;
-}
-
-static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
-				struct compat_nfsctl_arg __user *arg)
-{
-	if (!access_ok(VERIFY_READ, &arg->ca32_export,
-				sizeof(arg->ca32_export)) ||
-		get_user(karg->ca_version, &arg->ca32_version) ||
-		__copy_from_user(&karg->ca_export.ex_client[0],
-				&arg->ca32_export.ex32_client[0],
-				NFSCLNT_IDMAX) ||
-		__copy_from_user(&karg->ca_export.ex_path[0],
-				&arg->ca32_export.ex32_path[0],
-				NFS_MAXPATHLEN) ||
-		__get_user(karg->ca_export.ex_dev,
-				&arg->ca32_export.ex32_dev) ||
-		__get_user(karg->ca_export.ex_ino,
-				&arg->ca32_export.ex32_ino) ||
-		__get_user(karg->ca_export.ex_flags,
-				&arg->ca32_export.ex32_flags) ||
-		__get_user(karg->ca_export.ex_anon_uid,
-				&arg->ca32_export.ex32_anon_uid) ||
-		__get_user(karg->ca_export.ex_anon_gid,
-				&arg->ca32_export.ex32_anon_gid))
-		return -EFAULT;
-	SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
-	SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
-
-	return 0;
-}
-
-static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
-				struct compat_nfsctl_arg __user *arg)
-{
-	if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
-			sizeof(arg->ca32_getfd)) ||
-		get_user(karg->ca_version, &arg->ca32_version) ||
-		__copy_from_user(&karg->ca_getfd.gd_addr,
-				&arg->ca32_getfd.gd32_addr,
-				(sizeof(struct sockaddr))) ||
-		__copy_from_user(&karg->ca_getfd.gd_path,
-				&arg->ca32_getfd.gd32_path,
-				(NFS_MAXPATHLEN+1)) ||
-		__get_user(karg->ca_getfd.gd_version,
-				&arg->ca32_getfd.gd32_version))
-		return -EFAULT;
-
-	return 0;
-}
-
-static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
-				struct compat_nfsctl_arg __user *arg)
-{
-	if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
-		get_user(karg->ca_version, &arg->ca32_version) ||
-		__copy_from_user(&karg->ca_getfs.gd_addr,
-				&arg->ca32_getfs.gd32_addr,
-				(sizeof(struct sockaddr))) ||
-		__copy_from_user(&karg->ca_getfs.gd_path,
-				&arg->ca32_getfs.gd32_path,
-				(NFS_MAXPATHLEN+1)) ||
-		__get_user(karg->ca_getfs.gd_maxlen,
-				&arg->ca32_getfs.gd32_maxlen))
-		return -EFAULT;
-
-	return 0;
-}
-
-/* This really doesn't need translations, we are only passing
- * back a union which contains opaque nfs file handle data.
- */
-static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
-				union compat_nfsctl_res __user *res)
-{
-	int err;
-
-	err = copy_to_user(res, kres, sizeof(*res));
-
-	return (err) ? -EFAULT : 0;
-}
-
-asmlinkage long compat_sys_nfsservctl(int cmd,
-				struct compat_nfsctl_arg __user *arg,
-				union compat_nfsctl_res __user *res)
-{
-	struct nfsctl_arg *karg;
-	union nfsctl_res *kres;
-	mm_segment_t oldfs;
-	int err;
-
-	karg = kmalloc(sizeof(*karg), GFP_USER);
-	kres = kmalloc(sizeof(*kres), GFP_USER);
-	if(!karg || !kres) {
-		err = -ENOMEM;
-		goto done;
-	}
-
-	switch(cmd) {
-	case NFSCTL_SVC:
-		err = compat_nfs_svc_trans(karg, arg);
-		break;
-
-	case NFSCTL_ADDCLIENT:
-		err = compat_nfs_clnt_trans(karg, arg);
-		break;
-
-	case NFSCTL_DELCLIENT:
-		err = compat_nfs_clnt_trans(karg, arg);
-		break;
-
-	case NFSCTL_EXPORT:
-	case NFSCTL_UNEXPORT:
-		err = compat_nfs_exp_trans(karg, arg);
-		break;
-
-	case NFSCTL_GETFD:
-		err = compat_nfs_getfd_trans(karg, arg);
-		break;
-
-	case NFSCTL_GETFS:
-		err = compat_nfs_getfs_trans(karg, arg);
-		break;
-
-	default:
-		err = -EINVAL;
-		break;
-	}
-
-	if (err)
-		goto done;
-
-	oldfs = get_fs();
-	set_fs(KERNEL_DS);
-	/* The __user pointer casts are valid because of the set_fs() */
-	err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
-	set_fs(oldfs);
-
-	if (err)
-		goto done;
-
-	if((cmd == NFSCTL_GETFD) ||
-	   (cmd == NFSCTL_GETFS))
-		err = compat_nfs_getfh_res_trans(kres, res);
-
-done:
-	kfree(karg);
-	kfree(kres);
-	return err;
-}
-#else /* !NFSD */
 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
 {
 	return sys_ni_syscall();
 }
-#endif
 
 #ifdef CONFIG_EPOLL
 

fs/nfsctl.c

···
-/*
- *	fs/nfsctl.c
- *
- *	This should eventually move to userland.
- *
- */
-#include <linux/types.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/nfsd/syscall.h>
-#include <linux/cred.h>
-#include <linux/sched.h>
-#include <linux/linkage.h>
-#include <linux/namei.h>
-#include <linux/mount.h>
-#include <linux/syscalls.h>
-#include <asm/uaccess.h>
-
-/*
- * open a file on nfsd fs
- */
-
-static struct file *do_open(char *name, int flags)
-{
-	struct vfsmount *mnt;
-	struct file *file;
-
-	mnt = do_kern_mount("nfsd", 0, "nfsd", NULL);
-	if (IS_ERR(mnt))
-		return (struct file *)mnt;
-
-	file = file_open_root(mnt->mnt_root, mnt, name, flags);
-
-	mntput(mnt);	/* drop do_kern_mount reference */
-	return file;
-}
-
-static struct {
-	char *name; int wsize; int rsize;
-} map[] = {
-	[NFSCTL_SVC] = {
-		.name	= ".svc",
-		.wsize	= sizeof(struct nfsctl_svc)
-	},
-	[NFSCTL_ADDCLIENT] = {
-		.name	= ".add",
-		.wsize	= sizeof(struct nfsctl_client)
-	},
-	[NFSCTL_DELCLIENT] = {
-		.name	= ".del",
-		.wsize	= sizeof(struct nfsctl_client)
-	},
-	[NFSCTL_EXPORT] = {
-		.name	= ".export",
-		.wsize	= sizeof(struct nfsctl_export)
-	},
-	[NFSCTL_UNEXPORT] = {
-		.name	= ".unexport",
-		.wsize	= sizeof(struct nfsctl_export)
-	},
-	[NFSCTL_GETFD] = {
-		.name	= ".getfd",
-		.wsize	= sizeof(struct nfsctl_fdparm),
-		.rsize	= NFS_FHSIZE
-	},
-	[NFSCTL_GETFS] = {
-		.name	= ".getfs",
-		.wsize	= sizeof(struct nfsctl_fsparm),
-		.rsize	= sizeof(struct knfsd_fh)
-	},
-};
-
-SYSCALL_DEFINE3(nfsservctl, int, cmd, struct nfsctl_arg __user *, arg,
-		void __user *, res)
-{
-	struct file *file;
-	void __user *p = &arg->u;
-	int version;
-	int err;
-
-	if (copy_from_user(&version, &arg->ca_version, sizeof(int)))
-		return -EFAULT;
-
-	if (version != NFSCTL_VERSION)
-		return -EINVAL;
-
-	if (cmd < 0 || cmd >= ARRAY_SIZE(map) || !map[cmd].name)
-		return -EINVAL;
-
-	file = do_open(map[cmd].name, map[cmd].rsize ? O_RDWR : O_WRONLY);	
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-	err = file->f_op->write(file, p, map[cmd].wsize, &file->f_pos);
-	if (err >= 0 && map[cmd].rsize)
-		err = file->f_op->read(file, res, map[cmd].rsize, &file->f_pos);
-	if (err >= 0)
-		err = 0;
-	fput(file);
-	return err;
-}

fs/nfsd/Kconfig

···
 
 	  If unsure, say N.
 
-config NFSD_DEPRECATED
-	bool "Include support for deprecated syscall interface to NFSD"
-	depends on NFSD
-	default y
-	help
-	  The syscall interface to nfsd was obsoleted in 2.6.0 by a new
-	  filesystem based interface.  The old interface is due for removal
-	  in 2.6.40.  If you wish to remove the interface before then
-	  say N.
-
-	  In unsure, say Y.
-
 config NFSD_V2_ACL
 	bool
 	depends on NFSD

fs/nfsd/export.c

···
 	return ek;
 }
 
-#ifdef CONFIG_NFSD_DEPRECATED
-static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv,
-		       struct svc_export *exp)
-{
-	struct svc_expkey key, *ek;
-
-	key.ek_client = clp;
-	key.ek_fsidtype = fsid_type;
-	memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
-	key.ek_path = exp->ex_path;
-	key.h.expiry_time = NEVER;
-	key.h.flags = 0;
-
-	ek = svc_expkey_lookup(&key);
-	if (ek)
-		ek = svc_expkey_update(&key,ek);
-	if (ek) {
-		cache_put(&ek->h, &svc_expkey_cache);
-		return 0;
-	}
-	return -ENOMEM;
-}
-
-/*
- * Find the client's export entry matching xdev/xino.
- */
-static inline struct svc_expkey *
-exp_get_key(svc_client *clp, dev_t dev, ino_t ino)
-{
-	u32 fsidv[3];
-	
-	if (old_valid_dev(dev)) {
-		mk_fsid(FSID_DEV, fsidv, dev, ino, 0, NULL);
-		return exp_find_key(clp, FSID_DEV, fsidv, NULL);
-	}
-	mk_fsid(FSID_ENCODE_DEV, fsidv, dev, ino, 0, NULL);
-	return exp_find_key(clp, FSID_ENCODE_DEV, fsidv, NULL);
-}
-
-/*
- * Find the client's export entry matching fsid
- */
-static inline struct svc_expkey *
-exp_get_fsid_key(svc_client *clp, int fsid)
-{
-	u32 fsidv[2];
-
-	mk_fsid(FSID_NUM, fsidv, 0, 0, fsid, NULL);
-
-	return exp_find_key(clp, FSID_NUM, fsidv, NULL);
-}
-#endif
 
 static svc_export *exp_get_by_name(svc_client *clp, const struct path *path,
 				     struct cache_req *reqp)
···
 	return exp;
 }
 
-#ifdef CONFIG_NFSD_DEPRECATED
-/*
- * Hashtable locking. Write locks are placed only by user processes
- * wanting to modify export information.
- * Write locking only done in this file.  Read locking
- * needed externally.
- */
 
-static DECLARE_RWSEM(hash_sem);
-
-void
-exp_readlock(void)
-{
-	down_read(&hash_sem);
-}
-
-static inline void
-exp_writelock(void)
-{
-	down_write(&hash_sem);
-}
-
-void
-exp_readunlock(void)
-{
-	up_read(&hash_sem);
-}
-
-static inline void
-exp_writeunlock(void)
-{
-	up_write(&hash_sem);
-}
-#else
-
-/* hash_sem not needed once deprecated interface is removed */
-void exp_readlock(void) {}
-static inline void exp_writelock(void){}
-void exp_readunlock(void) {}
-static inline void exp_writeunlock(void){}
-
-#endif
-
-#ifdef CONFIG_NFSD_DEPRECATED
-static void		exp_do_unexport(svc_export *unexp);
-static int		exp_verify_string(char *cp, int max);
-
-static void exp_fsid_unhash(struct svc_export *exp)
-{
-	struct svc_expkey *ek;
-
-	if ((exp->ex_flags & NFSEXP_FSID) == 0)
-		return;
-
-	ek = exp_get_fsid_key(exp->ex_client, exp->ex_fsid);
-	if (!IS_ERR(ek)) {
-		sunrpc_invalidate(&ek->h, &svc_expkey_cache);
-		cache_put(&ek->h, &svc_expkey_cache);
-	}
-}
-
-static int exp_fsid_hash(svc_client *clp, struct svc_export *exp)
-{
-	u32 fsid[2];
- 
-	if ((exp->ex_flags & NFSEXP_FSID) == 0)
-		return 0;
-
-	mk_fsid(FSID_NUM, fsid, 0, 0, exp->ex_fsid, NULL);
-	return exp_set_key(clp, FSID_NUM, fsid, exp);
-}
-
-static int exp_hash(struct auth_domain *clp, struct svc_export *exp)
-{
-	u32 fsid[2];
-	struct inode *inode = exp->ex_path.dentry->d_inode;
-	dev_t dev = inode->i_sb->s_dev;
-
-	if (old_valid_dev(dev)) {
-		mk_fsid(FSID_DEV, fsid, dev, inode->i_ino, 0, NULL);
-		return exp_set_key(clp, FSID_DEV, fsid, exp);
-	}
-	mk_fsid(FSID_ENCODE_DEV, fsid, dev, inode->i_ino, 0, NULL);
-	return exp_set_key(clp, FSID_ENCODE_DEV, fsid, exp);
-}
-
-static void exp_unhash(struct svc_export *exp)
-{
-	struct svc_expkey *ek;
-	struct inode *inode = exp->ex_path.dentry->d_inode;
-
-	ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
-	if (!IS_ERR(ek)) {
-		sunrpc_invalidate(&ek->h, &svc_expkey_cache);
-		cache_put(&ek->h, &svc_expkey_cache);
-	}
-}
-	
-/*
- * Export a file system.
- */
-int
-exp_export(struct nfsctl_export *nxp)
-{
-	svc_client	*clp;
-	struct svc_export	*exp = NULL;
-	struct svc_export	new;
-	struct svc_expkey	*fsid_key = NULL;
-	struct path path;
-	int		err;
-
-	/* Consistency check */
-	err = -EINVAL;
-	if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) ||
-	    !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX))
-		goto out;
-
-	dprintk("exp_export called for %s:%s (%x/%ld fl %x).\n",
-			nxp->ex_client, nxp->ex_path,
-			(unsigned)nxp->ex_dev, (long)nxp->ex_ino,
-			nxp->ex_flags);
-
-	/* Try to lock the export table for update */
-	exp_writelock();
-
-	/* Look up client info */
-	if (!(clp = auth_domain_find(nxp->ex_client)))
-		goto out_unlock;
-
-
-	/* Look up the dentry */
-	err = kern_path(nxp->ex_path, 0, &path);
-	if (err)
-		goto out_put_clp;
-	err = -EINVAL;
-
-	exp = exp_get_by_name(clp, &path, NULL);
-
-	memset(&new, 0, sizeof(new));
-
-	/* must make sure there won't be an ex_fsid clash */
-	if ((nxp->ex_flags & NFSEXP_FSID) &&
-	    (!IS_ERR(fsid_key = exp_get_fsid_key(clp, nxp->ex_dev))) &&
-	    fsid_key->ek_path.mnt &&
-	    (fsid_key->ek_path.mnt != path.mnt ||
-	     fsid_key->ek_path.dentry != path.dentry))
-		goto finish;
-
-	if (!IS_ERR(exp)) {
-		/* just a flags/id/fsid update */
-
-		exp_fsid_unhash(exp);
-		exp->ex_flags    = nxp->ex_flags;
-		exp->ex_anon_uid = nxp->ex_anon_uid;
-		exp->ex_anon_gid = nxp->ex_anon_gid;
-		exp->ex_fsid     = nxp->ex_dev;
-
-		err = exp_fsid_hash(clp, exp);
-		goto finish;
-	}
-
-	err = check_export(path.dentry->d_inode, &nxp->ex_flags, NULL);
-	if (err) goto finish;
-
-	err = -ENOMEM;
-
-	dprintk("nfsd: creating export entry %p for client %p\n", exp, clp);
-
-	new.h.expiry_time = NEVER;
-	new.h.flags = 0;
-	new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL);
-	if (!new.ex_pathname)
-		goto finish;
-	new.ex_client = clp;
-	new.ex_path = path;
-	new.ex_flags = nxp->ex_flags;
-	new.ex_anon_uid = nxp->ex_anon_uid;
-	new.ex_anon_gid = nxp->ex_anon_gid;
-	new.ex_fsid = nxp->ex_dev;
-
-	exp = svc_export_lookup(&new);
-	if (exp)
-		exp = svc_export_update(&new, exp);
-
-	if (!exp)
-		goto finish;
-
-	if (exp_hash(clp, exp) ||
-	    exp_fsid_hash(clp, exp)) {
-		/* failed to create at least one index */
-		exp_do_unexport(exp);
-		cache_flush();
-	} else
-		err = 0;
-finish:
-	kfree(new.ex_pathname);
-	if (!IS_ERR_OR_NULL(exp))
-		exp_put(exp);
-	if (!IS_ERR_OR_NULL(fsid_key))
-		cache_put(&fsid_key->h, &svc_expkey_cache);
-	path_put(&path);
-out_put_clp:
-	auth_domain_put(clp);
-out_unlock:
-	exp_writeunlock();
-out:
-	return err;
-}
-
-/*
- * Unexport a file system. The export entry has already
- * been removed from the client's list of exported fs's.
- */
-static void
-exp_do_unexport(svc_export *unexp)
-{
-	sunrpc_invalidate(&unexp->h, &svc_export_cache);
-	exp_unhash(unexp);
-	exp_fsid_unhash(unexp);
-}
-
-
-/*
- * unexport syscall.
- */
-int
-exp_unexport(struct nfsctl_export *nxp)
-{
-	struct auth_domain *dom;
-	svc_export *exp;
-	struct path path;
-	int		err;
-
-	/* Consistency check */
-	if (!exp_verify_string(nxp->ex_path, NFS_MAXPATHLEN) ||
-	    !exp_verify_string(nxp->ex_client, NFSCLNT_IDMAX))
-		return -EINVAL;
-
-	exp_writelock();
-
-	err = -EINVAL;
-	dom = auth_domain_find(nxp->ex_client);
-	if (!dom) {
-		dprintk("nfsd: unexport couldn't find %s\n", nxp->ex_client);
-		goto out_unlock;
-	}
-
-	err = kern_path(nxp->ex_path, 0, &path);
-	if (err)
-		goto out_domain;
-
-	err = -EINVAL;
-	exp = exp_get_by_name(dom, &path, NULL);
-	path_put(&path);
-	if (IS_ERR(exp))
-		goto out_domain;
-
-	exp_do_unexport(exp);
-	exp_put(exp);
-	err = 0;
-
-out_domain:
-	auth_domain_put(dom);
-	cache_flush();
-out_unlock:
-	exp_writeunlock();
-	return err;
-}
-#endif /* CONFIG_NFSD_DEPRECATED */
 
 /*
  * Obtain the root fh on behalf of a client.
···
 	unsigned hash, export;
 	struct cache_head *ch;
 	
-	exp_readlock();
 	read_lock(&svc_export_cache.hash_lock);
 	if (!n--)
 		return SEQ_START_TOKEN;
···
 	__releases(svc_export_cache.hash_lock)
 {
 	read_unlock(&svc_export_cache.hash_lock);
-	exp_readunlock();
 }
 
 static struct flags {
···
 	.show	= e_show,
 };
 
-#ifdef CONFIG_NFSD_DEPRECATED
-/*
- * Add or modify a client.
- * Change requests may involve the list of host addresses. The list of
- * exports and possibly existing uid maps are left untouched.
- */
-int
-exp_addclient(struct nfsctl_client *ncp)
-{
-	struct auth_domain	*dom;
-	int			i, err;
-	struct in6_addr addr6;
-
-	/* First, consistency check. */
-	err = -EINVAL;
-	if (! exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX))
-		goto out;
-	if (ncp->cl_naddr > NFSCLNT_ADDRMAX)
-		goto out;
-
-	/* Lock the hashtable */
-	exp_writelock();
-
-	dom = unix_domain_find(ncp->cl_ident);
-
-	err = -ENOMEM;
-	if (!dom)
-		goto out_unlock;
-
-	/* Insert client into hashtable. */
-	for (i = 0; i < ncp->cl_naddr; i++) {
-		ipv6_addr_set_v4mapped(ncp->cl_addrlist[i].s_addr, &addr6);
-		auth_unix_add_addr(&init_net, &addr6, dom);
-	}
-	auth_unix_forget_old(dom);
-	auth_domain_put(dom);
-
-	err = 0;
-
-out_unlock:
-	exp_writeunlock();
-out:
-	return err;
-}
-
-/*
- * Delete a client given an identifier.
- */
-int
-exp_delclient(struct nfsctl_client *ncp)
-{
-	int		err;
-	struct auth_domain *dom;
-
-	err = -EINVAL;
-	if (!exp_verify_string(ncp->cl_ident, NFSCLNT_IDMAX))
-		goto out;
-
-	/* Lock the hashtable */
-	exp_writelock();
-
-	dom = auth_domain_find(ncp->cl_ident);
-	/* just make sure that no addresses work 
-	 * and that it will expire soon 
-	 */
-	if (dom) {
-		err = auth_unix_forget_old(dom);
-		auth_domain_put(dom);
-	}
-
-	exp_writeunlock();
-out:
-	return err;
-}
-
-/*
- * Verify that string is non-empty and does not exceed max length.
- */
-static int
-exp_verify_string(char *cp, int max)
-{
-	int	i;
-
-	for (i = 0; i < max; i++)
-		if (!cp[i])
-			return i;
-	cp[i] = 0;
-	printk(KERN_NOTICE "nfsd: couldn't validate string %s\n", cp);
-	return 0;
-}
-#endif /* CONFIG_NFSD_DEPRECATED */
 
 /*
  * Initialize the exports module.
···
 void
 nfsd_export_flush(void)
 {
-	exp_writelock();
 	cache_purge(&svc_expkey_cache);
 	cache_purge(&svc_export_cache);
-	exp_writeunlock();
 }
 
 /*
···
 
 	dprintk("nfsd: shutting down export module.\n");
 
-	exp_writelock();
-
 	cache_unregister(&svc_expkey_cache);
 	cache_unregister(&svc_export_cache);
 	svcauth_unix_purge();
 
-	exp_writeunlock();
 	dprintk("nfsd: export shutdown complete.\n");
 }

fs/nfsd/lockd.c

···
 	memcpy((char*)&fh.fh_handle.fh_base, f->data, f->size);
 	fh.fh_export = NULL;
 
-	exp_readlock();
 	nfserr = nfsd_open(rqstp, &fh, S_IFREG, NFSD_MAY_LOCK, filp);
 	fh_put(&fh);
-	exp_readunlock();
  	/* We return nlm error codes as nlm doesn't know
 	 * about nfsd, but nfsd does know about nlm..
 	 */

fs/nfsd/nfsctl.c

···
  */
 enum {
 	NFSD_Root = 1,
-#ifdef CONFIG_NFSD_DEPRECATED
-	NFSD_Svc,
-	NFSD_Add,
-	NFSD_Del,
-	NFSD_Export,
-	NFSD_Unexport,
-	NFSD_Getfd,
-	NFSD_Getfs,
-#endif
 	NFSD_List,
 	NFSD_Export_features,
 	NFSD_Fh,
···
 /*
  * write() for these nodes.
  */
-#ifdef CONFIG_NFSD_DEPRECATED
-static ssize_t write_svc(struct file *file, char *buf, size_t size);
-static ssize_t write_add(struct file *file, char *buf, size_t size);
-static ssize_t write_del(struct file *file, char *buf, size_t size);
-static ssize_t write_export(struct file *file, char *buf, size_t size);
-static ssize_t write_unexport(struct file *file, char *buf, size_t size);
-static ssize_t write_getfd(struct file *file, char *buf, size_t size);
-static ssize_t write_getfs(struct file *file, char *buf, size_t size);
-#endif
 static ssize_t write_filehandle(struct file *file, char *buf, size_t size);
 static ssize_t write_unlock_ip(struct file *file, char *buf, size_t size);
 static ssize_t write_unlock_fs(struct file *file, char *buf, size_t size);
···
 #endif
 
 static ssize_t (*write_op[])(struct file *, char *, size_t) = {
-#ifdef CONFIG_NFSD_DEPRECATED
-	[NFSD_Svc] = write_svc,
-	[NFSD_Add] = write_add,
-	[NFSD_Del] = write_del,
-	[NFSD_Export] = write_export,
-	[NFSD_Unexport] = write_unexport,
-	[NFSD_Getfd] = write_getfd,
-	[NFSD_Getfs] = write_getfs,
-#endif
 	[NFSD_Fh] = write_filehandle,
 	[NFSD_FO_UnlockIP] = write_unlock_ip,
 	[NFSD_FO_UnlockFS] = write_unlock_fs,
···
 
 static ssize_t nfsctl_transaction_read(struct file *file, char __user *buf, size_t size, loff_t *pos)
 {
-#ifdef CONFIG_NFSD_DEPRECATED
-	static int warned;
-	if (file->f_dentry->d_name.name[0] == '.' && !warned) {
-		printk(KERN_INFO
-		       "Warning: \"%s\" uses deprecated NFSD interface: %s."
-		       "  This will be removed in 2.6.40\n",
-		       current->comm, file->f_dentry->d_name.name);
-		warned = 1;
-	}
-#endif
 	if (! file->private_data) {
 		/* An attempt to read a transaction file without writing
 		 * causes a 0-byte write so that the file can return
···
  * payload - write methods
  */
 
-#ifdef CONFIG_NFSD_DEPRECATED
-/**
- * write_svc - Start kernel's NFSD server
- *
- * Deprecated.  /proc/fs/nfsd/threads is preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_svc
- *				svc_port:	port number of this
- *						server's listener
- *				svc_nthreads:	number of threads to start
- *			size:	size in bytes of passed in nfsctl_svc
- * Output:
- *	On success:	returns zero
- *	On error:	return code is negative errno value
- */
-static ssize_t write_svc(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_svc *data;
-	int err;
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_svc*) buf;
-	err = nfsd_svc(data->svc_port, data->svc_nthreads);
-	if (err < 0)
-		return err;
-	return 0;
-}
-
-/**
- * write_add - Add or modify client entry in auth unix cache
- *
- * Deprecated.  /proc/net/rpc/auth.unix.ip is preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_client
- *				cl_ident:	'\0'-terminated C string
- *						containing domain name
- *						of client
- *				cl_naddr:	no. of items in cl_addrlist
- *				cl_addrlist:	array of client addresses
- *				cl_fhkeytype:	ignored
- *				cl_fhkeylen:	ignored
- *				cl_fhkey:	ignored
- *			size:	size in bytes of passed in nfsctl_client
- * Output:
- *	On success:	returns zero
- *	On error:	return code is negative errno value
- *
- * Note: Only AF_INET client addresses are passed in, since
- * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
- */
-static ssize_t write_add(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_client *data;
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_client *)buf;
-	return exp_addclient(data);
-}
-
-/**
- * write_del - Remove client from auth unix cache
- *
- * Deprecated.  /proc/net/rpc/auth.unix.ip is preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_client
- *				cl_ident:	'\0'-terminated C string
- *						containing domain name
- *						of client
- *				cl_naddr:	ignored
- *				cl_addrlist:	ignored
- *				cl_fhkeytype:	ignored
- *				cl_fhkeylen:	ignored
- *				cl_fhkey:	ignored
- *			size:	size in bytes of passed in nfsctl_client
- * Output:
- *	On success:	returns zero
- *	On error:	return code is negative errno value
- *
- * Note: Only AF_INET client addresses are passed in, since
- * nfsctl_client.cl_addrlist contains only in_addr fields for addresses.
- */
-static ssize_t write_del(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_client *data;
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_client *)buf;
-	return exp_delclient(data);
-}
-
-/**
- * write_export - Export part or all of a local file system
- *
- * Deprecated.  /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_export
- *				ex_client:	'\0'-terminated C string
- *						containing domain name
- *						of client allowed to access
- *						this export
- *				ex_path:	'\0'-terminated C string
- *						containing pathname of
- *						directory in local file system
- *				ex_dev:		fsid to use for this export
- *				ex_ino:		ignored
- *				ex_flags:	export flags for this export
- *				ex_anon_uid:	UID to use for anonymous
- *						requests
- *				ex_anon_gid:	GID to use for anonymous
- *						requests
- *			size:	size in bytes of passed in nfsctl_export
- * Output:
- *	On success:	returns zero
- *	On error:	return code is negative errno value
- */
-static ssize_t write_export(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_export *data;
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_export*)buf;
-	return exp_export(data);
-}
-
-/**
- * write_unexport - Unexport a previously exported file system
- *
- * Deprecated.  /proc/net/rpc/{nfsd.export,nfsd.fh} are preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_export
- *				ex_client:	'\0'-terminated C string
- *						containing domain name
- *						of client no longer allowed
- *						to access this export
- *				ex_path:	'\0'-terminated C string
- *						containing pathname of
- *						directory in local file system
- *				ex_dev:		ignored
- *				ex_ino:		ignored
- *				ex_flags:	ignored
- *				ex_anon_uid:	ignored
- *				ex_anon_gid:	ignored
- *			size:	size in bytes of passed in nfsctl_export
- * Output:
- *	On success:	returns zero
- *	On error:	return code is negative errno value
- */
-static ssize_t write_unexport(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_export *data;
-
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_export*)buf;
-	return exp_unexport(data);
-}
-
-/**
- * write_getfs - Get a variable-length NFS file handle by path
- *
- * Deprecated.  /proc/fs/nfsd/filehandle is preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_fsparm
- *				gd_addr:	socket address of client
- *				gd_path:	'\0'-terminated C string
- *						containing pathname of
- *						directory in local file system
- *				gd_maxlen:	maximum size of returned file
- *						handle
- *			size:	size in bytes of passed in nfsctl_fsparm
- * Output:
- *	On success:	passed-in buffer filled with a knfsd_fh structure
- *			(a variable-length raw NFS file handle);
- *			return code is the size in bytes of the file handle
- *	On error:	return code is negative errno value
- *
- * Note: Only AF_INET client addresses are passed in, since gd_addr
- * is the same size as a struct sockaddr_in.
- */
-static ssize_t write_getfs(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_fsparm *data;
-	struct sockaddr_in *sin;
-	struct auth_domain *clp;
-	int err = 0;
-	struct knfsd_fh *res;
-	struct in6_addr in6;
-
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_fsparm*)buf;
-	err = -EPROTONOSUPPORT;
-	if (data->gd_addr.sa_family != AF_INET)
-		goto out;
-	sin = (struct sockaddr_in *)&data->gd_addr;
-	if (data->gd_maxlen > NFS3_FHSIZE)
-		data->gd_maxlen = NFS3_FHSIZE;
-
-	res = (struct knfsd_fh*)buf;
-
-	exp_readlock();
-
-	ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
-
-	clp = auth_unix_lookup(&init_net, &in6);
-	if (!clp)
-		err = -EPERM;
-	else {
-		err = exp_rootfh(clp, data->gd_path, res, data->gd_maxlen);
-		auth_domain_put(clp);
-	}
-	exp_readunlock();
-	if (err == 0)
-		err = res->fh_size + offsetof(struct knfsd_fh, fh_base);
- out:
-	return err;
-}
-
-/**
- * write_getfd - Get a fixed-length NFS file handle by path (used by mountd)
- *
- * Deprecated.  /proc/fs/nfsd/filehandle is preferred.
- * Function remains to support old versions of nfs-utils.
- *
- * Input:
- *			buf:	struct nfsctl_fdparm
- *				gd_addr:	socket address of client
- *				gd_path:	'\0'-terminated C string
- *						containing pathname of
- *						directory in local file system
- *				gd_version:	fdparm structure version
- *			size:	size in bytes of passed in nfsctl_fdparm
- * Output:
- *	On success:	passed-in buffer filled with nfsctl_res
- *			(a fixed-length raw NFS file handle);
- *			return code is the size in bytes of the file handle
- *	On error:	return code is negative errno value
- *
- * Note: Only AF_INET client addresses are passed in, since gd_addr
- * is the same size as a struct sockaddr_in.
- */
-static ssize_t write_getfd(struct file *file, char *buf, size_t size)
-{
-	struct nfsctl_fdparm *data;
-	struct sockaddr_in *sin;
-	struct auth_domain *clp;
-	int err = 0;
-	struct knfsd_fh fh;
-	char *res;
-	struct in6_addr in6;
-
-	if (size < sizeof(*data))
-		return -EINVAL;
-	data = (struct nfsctl_fdparm*)buf;
-	err = -EPROTONOSUPPORT;
-	if (data->gd_addr.sa_family != AF_INET)
-		goto out;
-	err = -EINVAL;
-	if (data->gd_version < 2 || data->gd_version > NFSSVC_MAXVERS)
-		goto out;
-
-	res = buf;
-	sin = (struct sockaddr_in *)&data->gd_addr;
-	exp_readlock();
-
-	ipv6_addr_set_v4mapped(sin->sin_addr.s_addr, &in6);
-
-	clp = auth_unix_lookup(&init_net, &in6);
-	if (!clp)
-		err = -EPERM;
-	else {
-		err = exp_rootfh(clp, data->gd_path, &fh, NFS_FHSIZE);
-		auth_domain_put(clp);
-	}
-	exp_readunlock();
-
-	if (err == 0) {
-		memset(res,0, NFS_FHSIZE);
-		memcpy(res, &fh.fh_base, fh.fh_size);
-		err = NFS_FHSIZE;
-	}
- out:
-	return err;
-}
-#endif /* CONFIG_NFSD_DEPRECATED */
 
 /**
  * write_unlock_ip - Release all locks used by a client
···
 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
 {
 	static struct tree_descr nfsd_files[] = {
-#ifdef CONFIG_NFSD_DEPRECATED
-		[NFSD_Svc] = {".svc", &transaction_ops, S_IWUSR},
-		[NFSD_Add] = {".add", &transaction_ops, S_IWUSR},
-		[NFSD_Del] = {".del", &transaction_ops, S_IWUSR},
-		[NFSD_Export] = {".export", &transaction_ops, S_IWUSR},
-		[NFSD_Unexport] = {".unexport", &transaction_ops, S_IWUSR},
-		[NFSD_Getfd] = {".getfd", &transaction_ops, S_IWUSR|S_IRUSR},
-		[NFSD_Getfs] = {".getfs", &transaction_ops, S_IWUSR|S_IRUSR},
-#endif
 		[NFSD_List] = {"exports", &exports_operations, S_IRUGO},
 		[NFSD_Export_features] = {"export_features",
 					&export_features_operations, S_IRUGO},

fs/nfsd/nfssvc.c

···
 			continue;
 		}
 
-
-		/* Lock the export hash tables for reading. */
-		exp_readlock();
-
 		validate_process_creds();
 		svc_process(rqstp);
 		validate_process_creds();
-
-		/* Unlock export hash tables */
-		exp_readunlock();
 	}
 
 	/* Clear signals before calling svc_exit_thread() */

include/linux/compat.h

···
 				 struct compat_timespec __user *tsp,
 				 const compat_sigset_t __user *sigmask,
 				 compat_size_t sigsetsize);
-#if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && \
-	!defined(CONFIG_NFSD_DEPRECATED)
-union compat_nfsctl_res;
-struct compat_nfsctl_arg;
-asmlinkage long compat_sys_nfsservctl(int cmd,
-				      struct compat_nfsctl_arg __user *arg,
-				      union compat_nfsctl_res __user *res);
-#else
 asmlinkage long compat_sys_nfsservctl(int cmd, void *notused, void *notused2);
-#endif
 asmlinkage long compat_sys_signalfd4(int ufd,
 				     const compat_sigset_t __user *sigmask,
 				     compat_size_t sigsetsize, int flags);

include/linux/nfsd/export.h

···
 int			nfsd_export_init(void);
 void			nfsd_export_shutdown(void);
 void			nfsd_export_flush(void);
-void			exp_readlock(void);
-void			exp_readunlock(void);
 struct svc_export *	rqst_exp_get_by_name(struct svc_rqst *,
 					     struct path *);
 struct svc_export *	rqst_exp_parent(struct svc_rqst *,

include/linux/sunrpc/cache.h

···
 	return rv - boot.tv_sec;
 }
 
-#ifdef CONFIG_NFSD_DEPRECATED
-static inline void sunrpc_invalidate(struct cache_head *h,
-				     struct cache_detail *detail)
-{
-	h->expiry_time = seconds_since_boot() - 1;
-	detail->nextcheck = seconds_since_boot();
-}
-#endif /* CONFIG_NFSD_DEPRECATED */
-
 #endif /*  _LINUX_SUNRPC_CACHE_H_ */

net/sunrpc/svcauth_unix.c

···
 
 struct unix_domain {
 	struct auth_domain	h;
-#ifdef CONFIG_NFSD_DEPRECATED
-	int	addr_changes;
-#endif /* CONFIG_NFSD_DEPRECATED */
 	/* other stuff later */
 };
 
···
 			return NULL;
 		}
 		new->h.flavour = &svcauth_unix;
-#ifdef CONFIG_NFSD_DEPRECATED
-		new->addr_changes = 0;
-#endif /* CONFIG_NFSD_DEPRECATED */
 		rv = auth_domain_lookup(name, &new->h);
 	}
 }
···
 	char			m_class[8]; /* e.g. "nfsd" */
 	struct in6_addr		m_addr;
 	struct unix_domain	*m_client;
-#ifdef CONFIG_NFSD_DEPRECATED
-	int			m_add_change;
-#endif /* CONFIG_NFSD_DEPRECATED */
 };
 
 static void ip_map_put(struct kref *kref)
···
 
 	kref_get(&item->m_client->h.ref);
 	new->m_client = item->m_client;
-#ifdef CONFIG_NFSD_DEPRECATED
-	new->m_add_change = item->m_add_change;
-#endif /* CONFIG_NFSD_DEPRECATED */
 }
 static struct cache_head *ip_map_alloc(void)
 {
···
 	ip.h.flags = 0;
 	if (!udom)
 		set_bit(CACHE_NEGATIVE, &ip.h.flags);
-#ifdef CONFIG_NFSD_DEPRECATED
-	else {
-		ip.m_add_change = udom->addr_changes;
-		/* if this is from the legacy set_client system call,
-		 * we need m_add_change to be one higher
-		 */
-		if (expiry == NEVER)
-			ip.m_add_change++;
-	}
-#endif /* CONFIG_NFSD_DEPRECATED */
 	ip.h.expiry_time = expiry;
 	ch = sunrpc_cache_update(cd, &ip.h, &ipm->h,
 				 hash_str(ipm->m_class, IP_HASHBITS) ^
···
 	return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry);
 }
 
-#ifdef CONFIG_NFSD_DEPRECATED
-int auth_unix_add_addr(struct net *net, struct in6_addr *addr, struct auth_domain *dom)
-{
-	struct unix_domain *udom;
-	struct ip_map *ipmp;
-
-	if (dom->flavour != &svcauth_unix)
-		return -EINVAL;
-	udom = container_of(dom, struct unix_domain, h);
-	ipmp = ip_map_lookup(net, "nfsd", addr);
-
-	if (ipmp)
-		return ip_map_update(net, ipmp, udom, NEVER);
-	else
-		return -ENOMEM;
-}
-EXPORT_SYMBOL_GPL(auth_unix_add_addr);
-
-int auth_unix_forget_old(struct auth_domain *dom)
-{
-	struct unix_domain *udom;
-
-	if (dom->flavour != &svcauth_unix)
-		return -EINVAL;
-	udom = container_of(dom, struct unix_domain, h);
-	udom->addr_changes++;
-	return 0;
-}
-EXPORT_SYMBOL_GPL(auth_unix_forget_old);
-
-struct auth_domain *auth_unix_lookup(struct net *net, struct in6_addr *addr)
-{
-	struct ip_map *ipm;
-	struct auth_domain *rv;
-	struct sunrpc_net *sn;
-
-	sn = net_generic(net, sunrpc_net_id);
-	ipm = ip_map_lookup(net, "nfsd", addr);
-
-	if (!ipm)
-		return NULL;
-	if (cache_check(sn->ip_map_cache, &ipm->h, NULL))
-		return NULL;
-
-	if ((ipm->m_client->addr_changes - ipm->m_add_change) >0) {
-		sunrpc_invalidate(&ipm->h, sn->ip_map_cache);
-		rv = NULL;
-	} else {
-		rv = &ipm->m_client->h;
-		kref_get(&rv->ref);
-	}
-	cache_put(&ipm->h, sn->ip_map_cache);
-	return rv;
-}
-EXPORT_SYMBOL_GPL(auth_unix_lookup);
-#endif /* CONFIG_NFSD_DEPRECATED */
 
 void svcauth_unix_purge(void)
 {