Linux-libre 4.5-gnu

1 files changed, 0 insertions, 1477 deletions

diff --git a/fs/aufs/i_op.c b/fs/aufs/i_op.c
deleted file mode 100644
index 6e50526d8..000000000
--- a/fs/aufs/i_op.c
+++ /dev/null
@@ -1,1477 +0,0 @@
-/*
- * Copyright (C) 2005-2016 Junjiro R. Okajima
- */
-
-/*
- * inode operations (except add/del/rename)
- */
-
-#include <linux/device_cgroup.h>
-#include <linux/fs_stack.h>
-#include <linux/namei.h>
-#include <linux/security.h>
-#include "aufs.h"
-
-static int h_permission(struct inode *h_inode, int mask,
-			struct vfsmount *h_mnt, int brperm)
-{
-	int err;
-	const unsigned char write_mask = !!(mask & (MAY_WRITE | MAY_APPEND));
-
-	err = -EACCES;
-	if ((write_mask && IS_IMMUTABLE(h_inode))
-	    || ((mask & MAY_EXEC)
-		&& S_ISREG(h_inode->i_mode)
-		&& ((h_mnt->mnt_flags & MNT_NOEXEC)
-		    || !(h_inode->i_mode & S_IXUGO))))
-		goto out;
-
-	/*
-	 * - skip the lower fs test in the case of write to ro branch.
-	 * - nfs dir permission write check is optimized, but a policy for
-	 *   link/rename requires a real check.
-	 * - nfs always sets MS_POSIXACL regardless its mount option 'noacl.'
-	 *   in this case, generic_permission() returns -EOPNOTSUPP.
-	 */
-	if ((write_mask && !au_br_writable(brperm))
-	    || (au_test_nfs(h_inode->i_sb) && S_ISDIR(h_inode->i_mode)
-		&& write_mask && !(mask & MAY_READ))
-	    || !h_inode->i_op->permission) {
-		/* AuLabel(generic_permission); */
-		/* AuDbg("get_acl %pf\n", h_inode->i_op->get_acl); */
-		err = generic_permission(h_inode, mask);
-		if (err == -EOPNOTSUPP && au_test_nfs_noacl(h_inode))
-			err = h_inode->i_op->permission(h_inode, mask);
-		AuTraceErr(err);
-	} else {
-		/* AuLabel(h_inode->permission); */
-		err = h_inode->i_op->permission(h_inode, mask);
-		AuTraceErr(err);
-	}
-
-	if (!err)
-		err = devcgroup_inode_permission(h_inode, mask);
-	if (!err)
-		err = security_inode_permission(h_inode, mask);
-
-#if 0
-	if (!err) {
-		/* todo: do we need to call ima_path_check()? */
-		struct path h_path = {
-			.dentry	=
-			.mnt	= h_mnt
-		};
-		err = ima_path_check(&h_path,
-				     mask & (MAY_READ | MAY_WRITE | MAY_EXEC),
-				     IMA_COUNT_LEAVE);
-	}
-#endif
-
-out:
-	return err;
-}
-
-static int aufs_permission(struct inode *inode, int mask)
-{
-	int err;
-	aufs_bindex_t bindex, bend;
-	const unsigned char isdir = !!S_ISDIR(inode->i_mode),
-		write_mask = !!(mask & (MAY_WRITE | MAY_APPEND));
-	struct inode *h_inode;
-	struct super_block *sb;
-	struct au_branch *br;
-
-	/* todo: support rcu-walk? */
-	if (mask & MAY_NOT_BLOCK)
-		return -ECHILD;
-
-	sb = inode->i_sb;
-	si_read_lock(sb, AuLock_FLUSH);
-	ii_read_lock_child(inode);
-#if 0
-	err = au_iigen_test(inode, au_sigen(sb));
-	if (unlikely(err))
-		goto out;
-#endif
-
-	if (!isdir
-	    || write_mask
-	    || au_opt_test(au_mntflags(sb), DIRPERM1)) {
-		err = au_busy_or_stale();
-		h_inode = au_h_iptr(inode, au_ibstart(inode));
-		if (unlikely(!h_inode
-			     || (h_inode->i_mode & S_IFMT)
-			     != (inode->i_mode & S_IFMT)))
-			goto out;
-
-		err = 0;
-		bindex = au_ibstart(inode);
-		br = au_sbr(sb, bindex);
-		err = h_permission(h_inode, mask, au_br_mnt(br), br->br_perm);
-		if (write_mask
-		    && !err
-		    && !special_file(h_inode->i_mode)) {
-			/* test whether the upper writable branch exists */
-			err = -EROFS;
-			for (; bindex >= 0; bindex--)
-				if (!au_br_rdonly(au_sbr(sb, bindex))) {
-					err = 0;
-					break;
-				}
-		}
-		goto out;
-	}
-
-	/* non-write to dir */
-	err = 0;
-	bend = au_ibend(inode);
-	for (bindex = au_ibstart(inode); !err && bindex <= bend; bindex++) {
-		h_inode = au_h_iptr(inode, bindex);
-		if (h_inode) {
-			err = au_busy_or_stale();
-			if (unlikely(!S_ISDIR(h_inode->i_mode)))
-				break;
-
-			br = au_sbr(sb, bindex);
-			err = h_permission(h_inode, mask, au_br_mnt(br),
-					   br->br_perm);
-		}
-	}
-
-out:
-	ii_read_unlock(inode);
-	si_read_unlock(sb);
-	return err;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry,
-				  unsigned int flags)
-{
-	struct dentry *ret, *parent;
-	struct inode *inode;
-	struct super_block *sb;
-	int err, npositive;
-
-	IMustLock(dir);
-
-	/* todo: support rcu-walk? */
-	ret = ERR_PTR(-ECHILD);
-	if (flags & LOOKUP_RCU)
-		goto out;
-
-	ret = ERR_PTR(-ENAMETOOLONG);
-	if (unlikely(dentry->d_name.len > AUFS_MAX_NAMELEN))
-		goto out;
-
-	sb = dir->i_sb;
-	err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-	ret = ERR_PTR(err);
-	if (unlikely(err))
-		goto out;
-
-	err = au_di_init(dentry);
-	ret = ERR_PTR(err);
-	if (unlikely(err))
-		goto out_si;
-
-	inode = NULL;
-	npositive = 0; /* suppress a warning */
-	parent = dentry->d_parent; /* dir inode is locked */
-	di_read_lock_parent(parent, AuLock_IR);
-	err = au_alive_dir(parent);
-	if (!err)
-		err = au_digen_test(parent, au_sigen(sb));
-	if (!err) {
-		npositive = au_lkup_dentry(dentry, au_dbstart(parent),
-					   /*type*/0);
-		err = npositive;
-	}
-	di_read_unlock(parent, AuLock_IR);
-	ret = ERR_PTR(err);
-	if (unlikely(err < 0))
-		goto out_unlock;
-
-	if (npositive) {
-		inode = au_new_inode(dentry, /*must_new*/0);
-		if (IS_ERR(inode)) {
-			ret = (void *)inode;
-			inode = NULL;
-			goto out_unlock;
-		}
-	}
-
-	if (inode)
-		atomic_inc(&inode->i_count);
-	ret = d_splice_alias(inode, dentry);
-#if 0
-	if (unlikely(d_need_lookup(dentry))) {
-		spin_lock(&dentry->d_lock);
-		dentry->d_flags &= ~DCACHE_NEED_LOOKUP;
-		spin_unlock(&dentry->d_lock);
-	} else
-#endif
-	if (inode) {
-		if (!IS_ERR(ret)) {
-			iput(inode);
-			if (ret && ret != dentry)
-				ii_write_unlock(inode);
-		} else {
-			ii_write_unlock(inode);
-			iput(inode);
-			inode = NULL;
-		}
-	}
-
-out_unlock:
-	di_write_unlock(dentry);
-	if (inode) {
-		/* verbose coding for lock class name */
-		if (unlikely(S_ISLNK(inode->i_mode)))
-			au_rw_class(&au_di(dentry)->di_rwsem,
-				    au_lc_key + AuLcSymlink_DIINFO);
-		else if (unlikely(S_ISDIR(inode->i_mode)))
-			au_rw_class(&au_di(dentry)->di_rwsem,
-				    au_lc_key + AuLcDir_DIINFO);
-		else /* likely */
-			au_rw_class(&au_di(dentry)->di_rwsem,
-				    au_lc_key + AuLcNonDir_DIINFO);
-	}
-out_si:
-	si_read_unlock(sb);
-out:
-	return ret;
-}
-
-/* ---------------------------------------------------------------------- */
-
-struct aopen_node {
-	struct hlist_node hlist;
-	struct file *file, *h_file;
-};
-
-static int au_do_aopen(struct inode *inode, struct file *file)
-{
-	struct au_sphlhead *aopen;
-	struct aopen_node *node;
-	struct au_do_open_args args = {
-		.no_lock	= 1,
-		.open		= au_do_open_nondir
-	};
-
-	aopen = &au_sbi(inode->i_sb)->si_aopen;
-	spin_lock(&aopen->spin);
-	hlist_for_each_entry(node, &aopen->head, hlist)
-		if (node->file == file) {
-			args.h_file = node->h_file;
-			break;
-		}
-	spin_unlock(&aopen->spin);
-	/* AuDebugOn(!args.h_file); */
-
-	return au_do_open(file, &args);
-}
-
-static int aufs_atomic_open(struct inode *dir, struct dentry *dentry,
-			    struct file *file, unsigned int open_flag,
-			    umode_t create_mode, int *opened)
-{
-	int err, h_opened = *opened;
-	struct dentry *parent;
-	struct dentry *d;
-	struct au_sphlhead *aopen;
-	struct vfsub_aopen_args args = {
-		.open_flag	= open_flag,
-		.create_mode	= create_mode,
-		.opened		= &h_opened
-	};
-	struct aopen_node aopen_node = {
-		.file	= file
-	};
-
-	IMustLock(dir);
-	AuDbg("open_flag 0x%x\n", open_flag);
-	AuDbgDentry(dentry);
-
-	err = 0;
-	if (!au_di(dentry)) {
-		d = aufs_lookup(dir, dentry, /*flags*/0);
-		if (IS_ERR(d)) {
-			err = PTR_ERR(d);
-			goto out;
-		} else if (d) {
-			/*
-			 * obsoleted dentry found.
-			 * another error will be returned later.
-			 */
-			d_drop(d);
-			dput(d);
-			AuDbgDentry(d);
-		}
-		AuDbgDentry(dentry);
-	}
-
-	if (d_is_positive(dentry)
-	    || d_unhashed(dentry)
-	    || d_unlinked(dentry)
-	    || !(open_flag & O_CREAT))
-		goto out_no_open;
-
-	err = aufs_read_lock(dentry, AuLock_DW | AuLock_FLUSH | AuLock_GEN);
-	if (unlikely(err))
-		goto out;
-
-	parent = dentry->d_parent;	/* dir is locked */
-	di_write_lock_parent(parent);
-	err = au_lkup_dentry(dentry, /*bstart*/0, /*type*/0);
-	if (unlikely(err))
-		goto out_unlock;
-
-	AuDbgDentry(dentry);
-	if (d_is_positive(dentry))
-		goto out_unlock;
-
-	args.file = get_empty_filp();
-	err = PTR_ERR(args.file);
-	if (IS_ERR(args.file))
-		goto out_unlock;
-
-	args.file->f_flags = file->f_flags;
-	err = au_aopen_or_create(dir, dentry, &args);
-	AuTraceErr(err);
-	AuDbgFile(args.file);
-	if (unlikely(err < 0)) {
-		if (h_opened & FILE_OPENED)
-			fput(args.file);
-		else
-			put_filp(args.file);
-		goto out_unlock;
-	}
-
-	/* some filesystems don't set FILE_CREATED while succeeded? */
-	*opened |= FILE_CREATED;
-	if (h_opened & FILE_OPENED)
-		aopen_node.h_file = args.file;
-	else {
-		put_filp(args.file);
-		args.file = NULL;
-	}
-	aopen = &au_sbi(dir->i_sb)->si_aopen;
-	au_sphl_add(&aopen_node.hlist, aopen);
-	err = finish_open(file, dentry, au_do_aopen, opened);
-	au_sphl_del(&aopen_node.hlist, aopen);
-	AuTraceErr(err);
-	AuDbgFile(file);
-	if (aopen_node.h_file)
-		fput(aopen_node.h_file);
-
-out_unlock:
-	di_write_unlock(parent);
-	aufs_read_unlock(dentry, AuLock_DW);
-	AuDbgDentry(dentry);
-	if (unlikely(err))
-		goto out;
-out_no_open:
-	if (!err && !(*opened & FILE_CREATED)) {
-		AuLabel(out_no_open);
-		dget(dentry);
-		err = finish_no_open(file, dentry);
-	}
-out:
-	AuDbg("%pd%s%s\n", dentry,
-	      (*opened & FILE_CREATED) ? " created" : "",
-	      (*opened & FILE_OPENED) ? " opened" : "");
-	AuTraceErr(err);
-	return err;
-}
-
-
-/* ---------------------------------------------------------------------- */
-
-static int au_wr_dir_cpup(struct dentry *dentry, struct dentry *parent,
-			  const unsigned char add_entry, aufs_bindex_t bcpup,
-			  aufs_bindex_t bstart)
-{
-	int err;
-	struct dentry *h_parent;
-	struct inode *h_dir;
-
-	if (add_entry)
-		IMustLock(d_inode(parent));
-	else
-		di_write_lock_parent(parent);
-
-	err = 0;
-	if (!au_h_dptr(parent, bcpup)) {
-		if (bstart > bcpup)
-			err = au_cpup_dirs(dentry, bcpup);
-		else if (bstart < bcpup)
-			err = au_cpdown_dirs(dentry, bcpup);
-		else
-			BUG();
-	}
-	if (!err && add_entry && !au_ftest_wrdir(add_entry, TMPFILE)) {
-		h_parent = au_h_dptr(parent, bcpup);
-		h_dir = d_inode(h_parent);
-		mutex_lock_nested(&h_dir->i_mutex, AuLsc_I_PARENT);
-		err = au_lkup_neg(dentry, bcpup, /*wh*/0);
-		/* todo: no unlock here */
-		mutex_unlock(&h_dir->i_mutex);
-
-		AuDbg("bcpup %d\n", bcpup);
-		if (!err) {
-			if (d_really_is_negative(dentry))
-				au_set_h_dptr(dentry, bstart, NULL);
-			au_update_dbrange(dentry, /*do_put_zero*/0);
-		}
-	}
-
-	if (!add_entry)
-		di_write_unlock(parent);
-	if (!err)
-		err = bcpup; /* success */
-
-	AuTraceErr(err);
-	return err;
-}
-
-/*
- * decide the branch and the parent dir where we will create a new entry.
- * returns new bindex or an error.
- * copyup the parent dir if needed.
- */
-int au_wr_dir(struct dentry *dentry, struct dentry *src_dentry,
-	      struct au_wr_dir_args *args)
-{
-	int err;
-	unsigned int flags;
-	aufs_bindex_t bcpup, bstart, src_bstart;
-	const unsigned char add_entry
-		= au_ftest_wrdir(args->flags, ADD_ENTRY)
-		| au_ftest_wrdir(args->flags, TMPFILE);
-	struct super_block *sb;
-	struct dentry *parent;
-	struct au_sbinfo *sbinfo;
-
-	sb = dentry->d_sb;
-	sbinfo = au_sbi(sb);
-	parent = dget_parent(dentry);
-	bstart = au_dbstart(dentry);
-	bcpup = bstart;
-	if (args->force_btgt < 0) {
-		if (src_dentry) {
-			src_bstart = au_dbstart(src_dentry);
-			if (src_bstart < bstart)
-				bcpup = src_bstart;
-		} else if (add_entry) {
-			flags = 0;
-			if (au_ftest_wrdir(args->flags, ISDIR))
-				au_fset_wbr(flags, DIR);
-			err = AuWbrCreate(sbinfo, dentry, flags);
-			bcpup = err;
-		}
-
-		if (bcpup < 0 || au_test_ro(sb, bcpup, d_inode(dentry))) {
-			if (add_entry)
-				err = AuWbrCopyup(sbinfo, dentry);
-			else {
-				if (!IS_ROOT(dentry)) {
-					di_read_lock_parent(parent, !AuLock_IR);
-					err = AuWbrCopyup(sbinfo, dentry);
-					di_read_unlock(parent, !AuLock_IR);
-				} else
-					err = AuWbrCopyup(sbinfo, dentry);
-			}
-			bcpup = err;
-			if (unlikely(err < 0))
-				goto out;
-		}
-	} else {
-		bcpup = args->force_btgt;
-		AuDebugOn(au_test_ro(sb, bcpup, d_inode(dentry)));
-	}
-
-	AuDbg("bstart %d, bcpup %d\n", bstart, bcpup);
-	err = bcpup;
-	if (bcpup == bstart)
-		goto out; /* success */
-
-	/* copyup the new parent into the branch we process */
-	err = au_wr_dir_cpup(dentry, parent, add_entry, bcpup, bstart);
-	if (err >= 0) {
-		if (d_really_is_negative(dentry)) {
-			au_set_h_dptr(dentry, bstart, NULL);
-			au_set_dbstart(dentry, bcpup);
-			au_set_dbend(dentry, bcpup);
-		}
-		AuDebugOn(add_entry
-			  && !au_ftest_wrdir(args->flags, TMPFILE)
-			  && !au_h_dptr(dentry, bcpup));
-	}
-
-out:
-	dput(parent);
-	return err;
-}
-
-/* ---------------------------------------------------------------------- */
-
-void au_pin_hdir_unlock(struct au_pin *p)
-{
-	if (p->hdir)
-		au_hn_imtx_unlock(p->hdir);
-}
-
-int au_pin_hdir_lock(struct au_pin *p)
-{
-	int err;
-
-	err = 0;
-	if (!p->hdir)
-		goto out;
-
-	/* even if an error happens later, keep this lock */
-	au_hn_imtx_lock_nested(p->hdir, p->lsc_hi);
-
-	err = -EBUSY;
-	if (unlikely(p->hdir->hi_inode != d_inode(p->h_parent)))
-		goto out;
-
-	err = 0;
-	if (p->h_dentry)
-		err = au_h_verify(p->h_dentry, p->udba, p->hdir->hi_inode,
-				  p->h_parent, p->br);
-
-out:
-	return err;
-}
-
-int au_pin_hdir_relock(struct au_pin *p)
-{
-	int err, i;
-	struct inode *h_i;
-	struct dentry *h_d[] = {
-		p->h_dentry,
-		p->h_parent
-	};
-
-	err = au_pin_hdir_lock(p);
-	if (unlikely(err))
-		goto out;
-
-	for (i = 0; !err && i < sizeof(h_d)/sizeof(*h_d); i++) {
-		if (!h_d[i])
-			continue;
-		if (d_is_positive(h_d[i])) {
-			h_i = d_inode(h_d[i]);
-			err = !h_i->i_nlink;
-		}
-	}
-
-out:
-	return err;
-}
-
-void au_pin_hdir_set_owner(struct au_pin *p, struct task_struct *task)
-{
-#if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP)
-	p->hdir->hi_inode->i_mutex.owner = task;
-#endif
-}
-
-void au_pin_hdir_acquire_nest(struct au_pin *p)
-{
-	if (p->hdir) {
-		mutex_acquire_nest(&p->hdir->hi_inode->i_mutex.dep_map,
-				   p->lsc_hi, 0, NULL, _RET_IP_);
-		au_pin_hdir_set_owner(p, current);
-	}
-}
-
-void au_pin_hdir_release(struct au_pin *p)
-{
-	if (p->hdir) {
-		au_pin_hdir_set_owner(p, p->task);
-		mutex_release(&p->hdir->hi_inode->i_mutex.dep_map, 1, _RET_IP_);
-	}
-}
-
-struct dentry *au_pinned_h_parent(struct au_pin *pin)
-{
-	if (pin && pin->parent)
-		return au_h_dptr(pin->parent, pin->bindex);
-	return NULL;
-}
-
-void au_unpin(struct au_pin *p)
-{
-	if (p->hdir)
-		au_pin_hdir_unlock(p);
-	if (p->h_mnt && au_ftest_pin(p->flags, MNT_WRITE))
-		vfsub_mnt_drop_write(p->h_mnt);
-	if (!p->hdir)
-		return;
-
-	if (!au_ftest_pin(p->flags, DI_LOCKED))
-		di_read_unlock(p->parent, AuLock_IR);
-	iput(p->hdir->hi_inode);
-	dput(p->parent);
-	p->parent = NULL;
-	p->hdir = NULL;
-	p->h_mnt = NULL;
-	/* do not clear p->task */
-}
-
-int au_do_pin(struct au_pin *p)
-{
-	int err;
-	struct super_block *sb;
-	struct inode *h_dir;
-
-	err = 0;
-	sb = p->dentry->d_sb;
-	p->br = au_sbr(sb, p->bindex);
-	if (IS_ROOT(p->dentry)) {
-		if (au_ftest_pin(p->flags, MNT_WRITE)) {
-			p->h_mnt = au_br_mnt(p->br);
-			err = vfsub_mnt_want_write(p->h_mnt);
-			if (unlikely(err)) {
-				au_fclr_pin(p->flags, MNT_WRITE);
-				goto out_err;
-			}
-		}
-		goto out;
-	}
-
-	p->h_dentry = NULL;
-	if (p->bindex <= au_dbend(p->dentry))
-		p->h_dentry = au_h_dptr(p->dentry, p->bindex);
-
-	p->parent = dget_parent(p->dentry);
-	if (!au_ftest_pin(p->flags, DI_LOCKED))
-		di_read_lock(p->parent, AuLock_IR, p->lsc_di);
-
-	h_dir = NULL;
-	p->h_parent = au_h_dptr(p->parent, p->bindex);
-	p->hdir = au_hi(d_inode(p->parent), p->bindex);
-	if (p->hdir)
-		h_dir = p->hdir->hi_inode;
-
-	/*
-	 * udba case, or
-	 * if DI_LOCKED is not set, then p->parent may be different
-	 * and h_parent can be NULL.
-	 */
-	if (unlikely(!p->hdir || !h_dir || !p->h_parent)) {
-		err = -EBUSY;
-		if (!au_ftest_pin(p->flags, DI_LOCKED))
-			di_read_unlock(p->parent, AuLock_IR);
-		dput(p->parent);
-		p->parent = NULL;
-		goto out_err;
-	}
-
-	if (au_ftest_pin(p->flags, MNT_WRITE)) {
-		p->h_mnt = au_br_mnt(p->br);
-		err = vfsub_mnt_want_write(p->h_mnt);
-		if (unlikely(err)) {
-			au_fclr_pin(p->flags, MNT_WRITE);
-			if (!au_ftest_pin(p->flags, DI_LOCKED))
-				di_read_unlock(p->parent, AuLock_IR);
-			dput(p->parent);
-			p->parent = NULL;
-			goto out_err;
-		}
-	}
-
-	au_igrab(h_dir);
-	err = au_pin_hdir_lock(p);
-	if (!err)
-		goto out; /* success */
-
-	au_unpin(p);
-
-out_err:
-	pr_err("err %d\n", err);
-	err = au_busy_or_stale();
-out:
-	return err;
-}
-
-void au_pin_init(struct au_pin *p, struct dentry *dentry,
-		 aufs_bindex_t bindex, int lsc_di, int lsc_hi,
-		 unsigned int udba, unsigned char flags)
-{
-	p->dentry = dentry;
-	p->udba = udba;
-	p->lsc_di = lsc_di;
-	p->lsc_hi = lsc_hi;
-	p->flags = flags;
-	p->bindex = bindex;
-
-	p->parent = NULL;
-	p->hdir = NULL;
-	p->h_mnt = NULL;
-
-	p->h_dentry = NULL;
-	p->h_parent = NULL;
-	p->br = NULL;
-	p->task = current;
-}
-
-int au_pin(struct au_pin *pin, struct dentry *dentry, aufs_bindex_t bindex,
-	   unsigned int udba, unsigned char flags)
-{
-	au_pin_init(pin, dentry, bindex, AuLsc_DI_PARENT, AuLsc_I_PARENT2,
-		    udba, flags);
-	return au_do_pin(pin);
-}
-
-/* ---------------------------------------------------------------------- */
-
-/*
- * ->setattr() and ->getattr() are called in various cases.
- * chmod, stat: dentry is revalidated.
- * fchmod, fstat: file and dentry are not revalidated, additionally they may be
- *		  unhashed.
- * for ->setattr(), ia->ia_file is passed from ftruncate only.
- */
-/* todo: consolidate with do_refresh() and simple_reval_dpath() */
-int au_reval_for_attr(struct dentry *dentry, unsigned int sigen)
-{
-	int err;
-	struct dentry *parent;
-
-	err = 0;
-	if (au_digen_test(dentry, sigen)) {
-		parent = dget_parent(dentry);
-		di_read_lock_parent(parent, AuLock_IR);
-		err = au_refresh_dentry(dentry, parent);
-		di_read_unlock(parent, AuLock_IR);
-		dput(parent);
-	}
-
-	AuTraceErr(err);
-	return err;
-}
-
-int au_pin_and_icpup(struct dentry *dentry, struct iattr *ia,
-		     struct au_icpup_args *a)
-{
-	int err;
-	loff_t sz;
-	aufs_bindex_t bstart, ibstart;
-	struct dentry *hi_wh, *parent;
-	struct inode *inode;
-	struct au_wr_dir_args wr_dir_args = {
-		.force_btgt	= -1,
-		.flags		= 0
-	};
-
-	if (d_is_dir(dentry))
-		au_fset_wrdir(wr_dir_args.flags, ISDIR);
-	/* plink or hi_wh() case */
-	bstart = au_dbstart(dentry);
-	inode = d_inode(dentry);
-	ibstart = au_ibstart(inode);
-	if (bstart != ibstart && !au_test_ro(inode->i_sb, ibstart, inode))
-		wr_dir_args.force_btgt = ibstart;
-	err = au_wr_dir(dentry, /*src_dentry*/NULL, &wr_dir_args);
-	if (unlikely(err < 0))
-		goto out;
-	a->btgt = err;
-	if (err != bstart)
-		au_fset_icpup(a->flags, DID_CPUP);
-
-	err = 0;
-	a->pin_flags = AuPin_MNT_WRITE;
-	parent = NULL;
-	if (!IS_ROOT(dentry)) {
-		au_fset_pin(a->pin_flags, DI_LOCKED);
-		parent = dget_parent(dentry);
-		di_write_lock_parent(parent);
-	}
-
-	err = au_pin(&a->pin, dentry, a->btgt, a->udba, a->pin_flags);
-	if (unlikely(err))
-		goto out_parent;
-
-	a->h_path.dentry = au_h_dptr(dentry, bstart);
-	sz = -1;
-	a->h_inode = d_inode(a->h_path.dentry);
-	if (ia && (ia->ia_valid & ATTR_SIZE)) {
-		mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
-		if (ia->ia_size < i_size_read(a->h_inode))
-			sz = ia->ia_size;
-		mutex_unlock(&a->h_inode->i_mutex);
-	}
-
-	hi_wh = NULL;
-	if (au_ftest_icpup(a->flags, DID_CPUP) && d_unlinked(dentry)) {
-		hi_wh = au_hi_wh(inode, a->btgt);
-		if (!hi_wh) {
-			struct au_cp_generic cpg = {
-				.dentry	= dentry,
-				.bdst	= a->btgt,
-				.bsrc	= -1,
-				.len	= sz,
-				.pin	= &a->pin
-			};
-			err = au_sio_cpup_wh(&cpg, /*file*/NULL);
-			if (unlikely(err))
-				goto out_unlock;
-			hi_wh = au_hi_wh(inode, a->btgt);
-			/* todo: revalidate hi_wh? */
-		}
-	}
-
-	if (parent) {
-		au_pin_set_parent_lflag(&a->pin, /*lflag*/0);
-		di_downgrade_lock(parent, AuLock_IR);
-		dput(parent);
-		parent = NULL;
-	}
-	if (!au_ftest_icpup(a->flags, DID_CPUP))
-		goto out; /* success */
-
-	if (!d_unhashed(dentry)) {
-		struct au_cp_generic cpg = {
-			.dentry	= dentry,
-			.bdst	= a->btgt,
-			.bsrc	= bstart,
-			.len	= sz,
-			.pin	= &a->pin,
-			.flags	= AuCpup_DTIME | AuCpup_HOPEN
-		};
-		err = au_sio_cpup_simple(&cpg);
-		if (!err)
-			a->h_path.dentry = au_h_dptr(dentry, a->btgt);
-	} else if (!hi_wh)
-		a->h_path.dentry = au_h_dptr(dentry, a->btgt);
-	else
-		a->h_path.dentry = hi_wh; /* do not dget here */
-
-out_unlock:
-	a->h_inode = d_inode(a->h_path.dentry);
-	if (!err)
-		goto out; /* success */
-	au_unpin(&a->pin);
-out_parent:
-	if (parent) {
-		di_write_unlock(parent);
-		dput(parent);
-	}
-out:
-	if (!err)
-		mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
-	return err;
-}
-
-static int aufs_setattr(struct dentry *dentry, struct iattr *ia)
-{
-	int err;
-	struct inode *inode, *delegated;
-	struct super_block *sb;
-	struct file *file;
-	struct au_icpup_args *a;
-
-	inode = d_inode(dentry);
-	IMustLock(inode);
-
-	err = -ENOMEM;
-	a = kzalloc(sizeof(*a), GFP_NOFS);
-	if (unlikely(!a))
-		goto out;
-
-	if (ia->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
-		ia->ia_valid &= ~ATTR_MODE;
-
-	file = NULL;
-	sb = dentry->d_sb;
-	err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-	if (unlikely(err))
-		goto out_kfree;
-
-	if (ia->ia_valid & ATTR_FILE) {
-		/* currently ftruncate(2) only */
-		AuDebugOn(!d_is_reg(dentry));
-		file = ia->ia_file;
-		err = au_reval_and_lock_fdi(file, au_reopen_nondir, /*wlock*/1);
-		if (unlikely(err))
-			goto out_si;
-		ia->ia_file = au_hf_top(file);
-		a->udba = AuOpt_UDBA_NONE;
-	} else {
-		/* fchmod() doesn't pass ia_file */
-		a->udba = au_opt_udba(sb);
-		di_write_lock_child(dentry);
-		/* no d_unlinked(), to set UDBA_NONE for root */
-		if (d_unhashed(dentry))
-			a->udba = AuOpt_UDBA_NONE;
-		if (a->udba != AuOpt_UDBA_NONE) {
-			AuDebugOn(IS_ROOT(dentry));
-			err = au_reval_for_attr(dentry, au_sigen(sb));
-			if (unlikely(err))
-				goto out_dentry;
-		}
-	}
-
-	err = au_pin_and_icpup(dentry, ia, a);
-	if (unlikely(err < 0))
-		goto out_dentry;
-	if (au_ftest_icpup(a->flags, DID_CPUP)) {
-		ia->ia_file = NULL;
-		ia->ia_valid &= ~ATTR_FILE;
-	}
-
-	a->h_path.mnt = au_sbr_mnt(sb, a->btgt);
-	if ((ia->ia_valid & (ATTR_MODE | ATTR_CTIME))
-	    == (ATTR_MODE | ATTR_CTIME)) {
-		err = security_path_chmod(&a->h_path, ia->ia_mode);
-		if (unlikely(err))
-			goto out_unlock;
-	} else if ((ia->ia_valid & (ATTR_UID | ATTR_GID))
-		   && (ia->ia_valid & ATTR_CTIME)) {
-		err = security_path_chown(&a->h_path, ia->ia_uid, ia->ia_gid);
-		if (unlikely(err))
-			goto out_unlock;
-	}
-
-	if (ia->ia_valid & ATTR_SIZE) {
-		struct file *f;
-
-		if (ia->ia_size < i_size_read(inode))
-			/* unmap only */
-			truncate_setsize(inode, ia->ia_size);
-
-		f = NULL;
-		if (ia->ia_valid & ATTR_FILE)
-			f = ia->ia_file;
-		mutex_unlock(&a->h_inode->i_mutex);
-		err = vfsub_trunc(&a->h_path, ia->ia_size, ia->ia_valid, f);
-		mutex_lock_nested(&a->h_inode->i_mutex, AuLsc_I_CHILD);
-	} else {
-		delegated = NULL;
-		while (1) {
-			err = vfsub_notify_change(&a->h_path, ia, &delegated);
-			if (delegated) {
-				err = break_deleg_wait(&delegated);
-				if (!err)
-					continue;
-			}
-			break;
-		}
-	}
-	/*
-	 * regardless aufs 'acl' option setting.
-	 * why don't all acl-aware fs call this func from their ->setattr()?
-	 */
-	if (!err && (ia->ia_valid & ATTR_MODE))
-		err = vfsub_acl_chmod(a->h_inode, ia->ia_mode);
-	if (!err)
-		au_cpup_attr_changeable(inode);
-
-out_unlock:
-	mutex_unlock(&a->h_inode->i_mutex);
-	au_unpin(&a->pin);
-	if (unlikely(err))
-		au_update_dbstart(dentry);
-out_dentry:
-	di_write_unlock(dentry);
-	if (file) {
-		fi_write_unlock(file);
-		ia->ia_file = file;
-		ia->ia_valid |= ATTR_FILE;
-	}
-out_si:
-	si_read_unlock(sb);
-out_kfree:
-	kfree(a);
-out:
-	AuTraceErr(err);
-	return err;
-}
-
-#if IS_ENABLED(CONFIG_AUFS_XATTR) || IS_ENABLED(CONFIG_FS_POSIX_ACL)
-static int au_h_path_to_set_attr(struct dentry *dentry,
-				 struct au_icpup_args *a, struct path *h_path)
-{
-	int err;
-	struct super_block *sb;
-
-	sb = dentry->d_sb;
-	a->udba = au_opt_udba(sb);
-	/* no d_unlinked(), to set UDBA_NONE for root */
-	if (d_unhashed(dentry))
-		a->udba = AuOpt_UDBA_NONE;
-	if (a->udba != AuOpt_UDBA_NONE) {
-		AuDebugOn(IS_ROOT(dentry));
-		err = au_reval_for_attr(dentry, au_sigen(sb));
-		if (unlikely(err))
-			goto out;
-	}
-	err = au_pin_and_icpup(dentry, /*ia*/NULL, a);
-	if (unlikely(err < 0))
-		goto out;
-
-	h_path->dentry = a->h_path.dentry;
-	h_path->mnt = au_sbr_mnt(sb, a->btgt);
-
-out:
-	return err;
-}
-
-ssize_t au_srxattr(struct dentry *dentry, struct au_srxattr *arg)
-{
-	int err;
-	struct path h_path;
-	struct super_block *sb;
-	struct au_icpup_args *a;
-	struct inode *inode, *h_inode;
-
-	inode = d_inode(dentry);
-	IMustLock(inode);
-
-	err = -ENOMEM;
-	a = kzalloc(sizeof(*a), GFP_NOFS);
-	if (unlikely(!a))
-		goto out;
-
-	sb = dentry->d_sb;
-	err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-	if (unlikely(err))
-		goto out_kfree;
-
-	h_path.dentry = NULL;	/* silence gcc */
-	di_write_lock_child(dentry);
-	err = au_h_path_to_set_attr(dentry, a, &h_path);
-	if (unlikely(err))
-		goto out_di;
-
-	mutex_unlock(&a->h_inode->i_mutex);
-	switch (arg->type) {
-	case AU_XATTR_SET:
-		err = vfsub_setxattr(h_path.dentry,
-				     arg->u.set.name, arg->u.set.value,
-				     arg->u.set.size, arg->u.set.flags);
-		break;
-	case AU_XATTR_REMOVE:
-		err = vfsub_removexattr(h_path.dentry, arg->u.remove.name);
-		break;
-	case AU_ACL_SET:
-		err = -EOPNOTSUPP;
-		h_inode = d_inode(h_path.dentry);
-		if (h_inode->i_op->set_acl)
-			err = h_inode->i_op->set_acl(h_inode,
-						     arg->u.acl_set.acl,
-						     arg->u.acl_set.type);
-		break;
-	}
-	if (!err)
-		au_cpup_attr_timesizes(inode);
-
-	au_unpin(&a->pin);
-	if (unlikely(err))
-		au_update_dbstart(dentry);
-
-out_di:
-	di_write_unlock(dentry);
-	si_read_unlock(sb);
-out_kfree:
-	kfree(a);
-out:
-	AuTraceErr(err);
-	return err;
-}
-#endif
-
-static void au_refresh_iattr(struct inode *inode, struct kstat *st,
-			     unsigned int nlink)
-{
-	unsigned int n;
-
-	inode->i_mode = st->mode;
-	/* don't i_[ug]id_write() here */
-	inode->i_uid = st->uid;
-	inode->i_gid = st->gid;
-	inode->i_atime = st->atime;
-	inode->i_mtime = st->mtime;
-	inode->i_ctime = st->ctime;
-
-	au_cpup_attr_nlink(inode, /*force*/0);
-	if (S_ISDIR(inode->i_mode)) {
-		n = inode->i_nlink;
-		n -= nlink;
-		n += st->nlink;
-		smp_mb(); /* for i_nlink */
-		/* 0 can happen */
-		set_nlink(inode, n);
-	}
-
-	spin_lock(&inode->i_lock);
-	inode->i_blocks = st->blocks;
-	i_size_write(inode, st->size);
-	spin_unlock(&inode->i_lock);
-}
-
-/*
- * common routine for aufs_getattr() and aufs_getxattr().
- * returns zero or negative (an error).
- * @dentry will be read-locked in success.
- */
-int au_h_path_getattr(struct dentry *dentry, int force, struct path *h_path)
-{
-	int err;
-	unsigned int mnt_flags, sigen;
-	unsigned char udba_none;
-	aufs_bindex_t bindex;
-	struct super_block *sb, *h_sb;
-	struct inode *inode;
-
-	h_path->mnt = NULL;
-	h_path->dentry = NULL;
-
-	err = 0;
-	sb = dentry->d_sb;
-	mnt_flags = au_mntflags(sb);
-	udba_none = !!au_opt_test(mnt_flags, UDBA_NONE);
-
-	/* support fstat(2) */
-	if (!d_unlinked(dentry) && !udba_none) {
-		sigen = au_sigen(sb);
-		err = au_digen_test(dentry, sigen);
-		if (!err) {
-			di_read_lock_child(dentry, AuLock_IR);
-			err = au_dbrange_test(dentry);
-			if (unlikely(err)) {
-				di_read_unlock(dentry, AuLock_IR);
-				goto out;
-			}
-		} else {
-			AuDebugOn(IS_ROOT(dentry));
-			di_write_lock_child(dentry);
-			err = au_dbrange_test(dentry);
-			if (!err)
-				err = au_reval_for_attr(dentry, sigen);
-			if (!err)
-				di_downgrade_lock(dentry, AuLock_IR);
-			else {
-				di_write_unlock(dentry);
-				goto out;
-			}
-		}
-	} else
-		di_read_lock_child(dentry, AuLock_IR);
-
-	inode = d_inode(dentry);
-	bindex = au_ibstart(inode);
-	h_path->mnt = au_sbr_mnt(sb, bindex);
-	h_sb = h_path->mnt->mnt_sb;
-	if (!force
-	    && !au_test_fs_bad_iattr(h_sb)
-	    && udba_none)
-		goto out; /* success */
-
-	if (au_dbstart(dentry) == bindex)
-		h_path->dentry = au_h_dptr(dentry, bindex);
-	else if (au_opt_test(mnt_flags, PLINK) && au_plink_test(inode)) {
-		h_path->dentry = au_plink_lkup(inode, bindex);
-		if (IS_ERR(h_path->dentry))
-			/* pretending success */
-			h_path->dentry = NULL;
-		else
-			dput(h_path->dentry);
-	}
-
-out:
-	return err;
-}
-
-static int aufs_getattr(struct vfsmount *mnt __maybe_unused,
-			struct dentry *dentry, struct kstat *st)
-{
-	int err;
-	unsigned char positive;
-	struct path h_path;
-	struct inode *inode;
-	struct super_block *sb;
-
-	inode = d_inode(dentry);
-	sb = dentry->d_sb;
-	err = si_read_lock(sb, AuLock_FLUSH | AuLock_NOPLM);
-	if (unlikely(err))
-		goto out;
-	err = au_h_path_getattr(dentry, /*force*/0, &h_path);
-	if (unlikely(err))
-		goto out_si;
-	if (unlikely(!h_path.dentry))
-		/* illegally overlapped or something */
-		goto out_fill; /* pretending success */
-
-	positive = d_is_positive(h_path.dentry);
-	if (positive)
-		err = vfs_getattr(&h_path, st);
-	if (!err) {
-		if (positive)
-			au_refresh_iattr(inode, st,
-					 d_inode(h_path.dentry)->i_nlink);
-		goto out_fill; /* success */
-	}
-	AuTraceErr(err);
-	goto out_di;
-
-out_fill:
-	generic_fillattr(inode, st);
-out_di:
-	di_read_unlock(dentry, AuLock_IR);
-out_si:
-	si_read_unlock(sb);
-out:
-	AuTraceErr(err);
-	return err;
-}
-
-/* ---------------------------------------------------------------------- */
-
-/*
- * Assumption:
- * - the number of symlinks is not so many.
- *
- * Structure:
- * - sbinfo (instead of iinfo) contains an hlist of struct au_symlink.
- *   If iinfo contained the hlist, then it would be rather large waste of memory
- *   I am afraid.
- * - struct au_symlink contains the necessary info for h_inode follow_link() and
- *   put_link().
- */
-
-struct au_symlink {
-	union {
-		struct hlist_node hlist;
-		struct rcu_head rcu;
-	};
-
-	struct inode *h_inode;
-	void *h_cookie;
-};
-
-static void au_symlink_add(struct super_block *sb, struct au_symlink *slink,
-			   struct inode *h_inode, void *cookie)
-{
-	struct au_sbinfo *sbinfo;
-
-	ihold(h_inode);
-	slink->h_inode = h_inode;
-	slink->h_cookie = cookie;
-	sbinfo = au_sbi(sb);
-	au_sphl_add(&slink->hlist, &sbinfo->si_symlink);
-}
-
-static void au_symlink_del(struct super_block *sb, struct au_symlink *slink)
-{
-	struct au_sbinfo *sbinfo;
-
-	/* do not iput() within rcu */
-	iput(slink->h_inode);
-	slink->h_inode = NULL;
-	sbinfo = au_sbi(sb);
-	au_sphl_del_rcu(&slink->hlist, &sbinfo->si_symlink);
-	kfree_rcu(slink, rcu);
-}
-
-static const char *aufs_follow_link(struct dentry *dentry, void **cookie)
-{
-	const char *ret;
-	struct inode *inode, *h_inode;
-	struct dentry *h_dentry;
-	struct au_symlink *slink;
-	int err;
-	aufs_bindex_t bindex;
-
-	ret = NULL; /* suppress a warning */
-	err = aufs_read_lock(dentry, AuLock_IR | AuLock_GEN);
-	if (unlikely(err))
-		goto out;
-
-	err = au_d_hashed_positive(dentry);
-	if (unlikely(err))
-		goto out_unlock;
-
-	err = -EINVAL;
-	inode = d_inode(dentry);
-	bindex = au_ibstart(inode);
-	h_inode = au_h_iptr(inode, bindex);
-	if (unlikely(!h_inode->i_op->follow_link))
-		goto out_unlock;
-
-	err = -ENOMEM;
-	slink = kmalloc(sizeof(*slink), GFP_NOFS);
-	if (unlikely(!slink))
-		goto out_unlock;
-
-	err = -EBUSY;
-	h_dentry = NULL;
-	if (au_dbstart(dentry) <= bindex) {
-		h_dentry = au_h_dptr(dentry, bindex);
-		if (h_dentry)
-			dget(h_dentry);
-	}
-	if (!h_dentry) {
-		h_dentry = d_find_any_alias(h_inode);
-		if (IS_ERR(h_dentry)) {
-			err = PTR_ERR(h_dentry);
-			goto out_free;
-		}
-	}
-	if (unlikely(!h_dentry))
-		goto out_free;
-
-	err = 0;
-	AuDbg("%pf\n", h_inode->i_op->follow_link);
-	AuDbgDentry(h_dentry);
-	ret = h_inode->i_op->follow_link(h_dentry, cookie);
-	dput(h_dentry);
-
-	if (!IS_ERR_OR_NULL(ret)) {
-		au_symlink_add(inode->i_sb, slink, h_inode, *cookie);
-		*cookie = slink;
-		AuDbg("slink %p\n", slink);
-		goto out_unlock; /* success */
-	}
-
-out_free:
-	slink->h_inode = NULL;
-	kfree_rcu(slink, rcu);
-out_unlock:
-	aufs_read_unlock(dentry, AuLock_IR);
-out:
-	if (unlikely(err))
-		ret = ERR_PTR(err);
-	AuTraceErrPtr(ret);
-	return ret;
-}
-
-static void aufs_put_link(struct inode *inode, void *cookie)
-{
-	struct au_symlink *slink;
-	struct inode *h_inode;
-
-	slink = cookie;
-	AuDbg("slink %p\n", slink);
-	h_inode = slink->h_inode;
-	AuDbg("%pf\n", h_inode->i_op->put_link);
-	AuDbgInode(h_inode);
-	if (h_inode->i_op->put_link)
-		h_inode->i_op->put_link(h_inode, slink->h_cookie);
-	au_symlink_del(inode->i_sb, slink);
-}
-
-/* ---------------------------------------------------------------------- */
-
-static int aufs_update_time(struct inode *inode, struct timespec *ts, int flags)
-{
-	int err;
-	struct super_block *sb;
-	struct inode *h_inode;
-
-	sb = inode->i_sb;
-	/* mmap_sem might be acquired already, cf. aufs_mmap() */
-	lockdep_off();
-	si_read_lock(sb, AuLock_FLUSH);
-	ii_write_lock_child(inode);
-	lockdep_on();
-	h_inode = au_h_iptr(inode, au_ibstart(inode));
-	err = vfsub_update_time(h_inode, ts, flags);
-	lockdep_off();
-	if (!err)
-		au_cpup_attr_timesizes(inode);
-	ii_write_unlock(inode);
-	si_read_unlock(sb);
-	lockdep_on();
-
-	if (!err && (flags & S_VERSION))
-		inode_inc_iversion(inode);
-
-	return err;
-}
-
-/* ---------------------------------------------------------------------- */
-
-/* no getattr version will be set by module.c:aufs_init() */
-struct inode_operations aufs_iop_nogetattr[AuIop_Last],
-	aufs_iop[] = {
-	[AuIop_SYMLINK] = {
-		.permission	= aufs_permission,
-#ifdef CONFIG_FS_POSIX_ACL
-		.get_acl	= aufs_get_acl,
-		.set_acl	= aufs_set_acl, /* unsupport for symlink? */
-#endif
-
-		.setattr	= aufs_setattr,
-		.getattr	= aufs_getattr,
-
-#ifdef CONFIG_AUFS_XATTR
-		.setxattr	= aufs_setxattr,
-		.getxattr	= aufs_getxattr,
-		.listxattr	= aufs_listxattr,
-		.removexattr	= aufs_removexattr,
-#endif
-
-		.readlink	= generic_readlink,
-		.follow_link	= aufs_follow_link,
-		.put_link	= aufs_put_link,
-
-		/* .update_time	= aufs_update_time */
-	},
-	[AuIop_DIR] = {
-		.create		= aufs_create,
-		.lookup		= aufs_lookup,
-		.link		= aufs_link,
-		.unlink		= aufs_unlink,
-		.symlink	= aufs_symlink,
-		.mkdir		= aufs_mkdir,
-		.rmdir		= aufs_rmdir,
-		.mknod		= aufs_mknod,
-		.rename		= aufs_rename,
-
-		.permission	= aufs_permission,
-#ifdef CONFIG_FS_POSIX_ACL
-		.get_acl	= aufs_get_acl,
-		.set_acl	= aufs_set_acl,
-#endif
-
-		.setattr	= aufs_setattr,
-		.getattr	= aufs_getattr,
-
-#ifdef CONFIG_AUFS_XATTR
-		.setxattr	= aufs_setxattr,
-		.getxattr	= aufs_getxattr,
-		.listxattr	= aufs_listxattr,
-		.removexattr	= aufs_removexattr,
-#endif
-
-		.update_time	= aufs_update_time,
-		.atomic_open	= aufs_atomic_open,
-		.tmpfile	= aufs_tmpfile
-	},
-	[AuIop_OTHER] = {
-		.permission	= aufs_permission,
-#ifdef CONFIG_FS_POSIX_ACL
-		.get_acl	= aufs_get_acl,
-		.set_acl	= aufs_set_acl,
-#endif
-
-		.setattr	= aufs_setattr,
-		.getattr	= aufs_getattr,
-
-#ifdef CONFIG_AUFS_XATTR
-		.setxattr	= aufs_setxattr,
-		.getxattr	= aufs_getxattr,
-		.listxattr	= aufs_listxattr,
-		.removexattr	= aufs_removexattr,
-#endif
-
-		.update_time	= aufs_update_time
-	}
-};