fs/xfs/linux-2.6/xfs_iops.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  * All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation.
  *
  * This program is distributed in the hope that it would be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write the Free Software Foundation,
  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 #include "xfs.h"
 #include "xfs_fs.h"
 #include "xfs_bit.h"
 #include "xfs_log.h"
 #include "xfs_inum.h"
 #include "xfs_trans.h"
 #include "xfs_sb.h"
 #include "xfs_ag.h"
 #include "xfs_dir2.h"
 #include "xfs_alloc.h"
 #include "xfs_dmapi.h"
 #include "xfs_quota.h"
 #include "xfs_mount.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_dir2_sf.h"
 #include "xfs_attr_sf.h"
 #include "xfs_dinode.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
 #include "xfs_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_rtalloc.h"
 #include "xfs_error.h"
 #include "xfs_itable.h"
 #include "xfs_rw.h"
 #include "xfs_acl.h"
 #include "xfs_attr.h"
 #include "xfs_buf_item.h"
 #include "xfs_utils.h"

 #include <linux/capability.h>
 #include <linux/xattr.h>
 #include <linux/namei.h>
 #include <linux/security.h>

 /*
  * Get a XFS inode from a given vnode.
  */
 xfs_inode_t *
 xfs_vtoi(
 	bhv_vnode_t	*vp)
 {
 	bhv_desc_t      *bdp;

 	bdp = bhv_lookup_range(VN_BHV_HEAD(vp),
 			VNODE_POSITION_XFS, VNODE_POSITION_XFS);
 	if (unlikely(bdp == NULL))
 		return NULL;
 	return XFS_BHVTOI(bdp);
 }

 /*
  * Bring the atime in the XFS inode uptodate.
  * Used before logging the inode to disk or when the Linux inode goes away.
  */
 void
 xfs_synchronize_atime(
 	xfs_inode_t	*ip)
 {
 	bhv_vnode_t	*vp;

 	vp = XFS_ITOV_NULL(ip);
 	if (vp) {
 		struct inode *inode = &vp->v_inode;
 		ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
 		ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
 	}
 }

 /*
  * Change the requested timestamp in the given inode.
  * We don't lock across timestamp updates, and we don't log them but
  * we do record the fact that there is dirty information in core.
  *
  * NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
  *		with XFS_ICHGTIME_ACC to be sure that access time
  *		update will take.  Calling first with XFS_ICHGTIME_ACC
  *		and then XFS_ICHGTIME_MOD may fail to modify the access
  *		timestamp if the filesystem is mounted noacctm.
  */
 void
 xfs_ichgtime(
 	xfs_inode_t	*ip,
 	int		flags)
 {
 	struct inode	*inode = vn_to_inode(XFS_ITOV(ip));
 	timespec_t	tv;

 	nanotime(&tv);
 	if (flags & XFS_ICHGTIME_MOD) {
 		inode->i_mtime = tv;
 		ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
 		ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
 	}
 	if (flags & XFS_ICHGTIME_ACC) {
 		inode->i_atime = tv;
 		ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
 		ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
 	}
 	if (flags & XFS_ICHGTIME_CHG) {
 		inode->i_ctime = tv;
 		ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
 		ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
 	}

 	/*
 	 * We update the i_update_core field _after_ changing
 	 * the timestamps in order to coordinate properly with
 	 * xfs_iflush() so that we don't lose timestamp updates.
 	 * This keeps us from having to hold the inode lock
 	 * while doing this.  We use the SYNCHRONIZE macro to
 	 * ensure that the compiler does not reorder the update
 	 * of i_update_core above the timestamp updates above.
 	 */
 	SYNCHRONIZE();
 	ip->i_update_core = 1;
 	if (!(inode->i_state & I_LOCK))
 		mark_inode_dirty_sync(inode);
 }

 /*
  * Variant on the above which avoids querying the system clock
  * in situations where we know the Linux inode timestamps have
  * just been updated (and so we can update our inode cheaply).
  */
 void
 xfs_ichgtime_fast(
 	xfs_inode_t	*ip,
 	struct inode	*inode,
 	int		flags)
 {
 	timespec_t	*tvp;

 	/*
 	 * Atime updates for read() & friends are handled lazily now, and
 	 * explicit updates must go through xfs_ichgtime()
 	 */
 	ASSERT((flags & XFS_ICHGTIME_ACC) == 0);

 	/*
 	 * We're not supposed to change timestamps in readonly-mounted
 	 * filesystems.  Throw it away if anyone asks us.
 	 */
 	if (unlikely(IS_RDONLY(inode)))
 		return;

 	if (flags & XFS_ICHGTIME_MOD) {
 		tvp = &inode->i_mtime;
 		ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
 		ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
 	}
 	if (flags & XFS_ICHGTIME_CHG) {
 		tvp = &inode->i_ctime;
 		ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
 		ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
 	}

 	/*
 	 * We update the i_update_core field _after_ changing
 	 * the timestamps in order to coordinate properly with
 	 * xfs_iflush() so that we don't lose timestamp updates.
 	 * This keeps us from having to hold the inode lock
 	 * while doing this.  We use the SYNCHRONIZE macro to
 	 * ensure that the compiler does not reorder the update
 	 * of i_update_core above the timestamp updates above.
 	 */
 	SYNCHRONIZE();
 	ip->i_update_core = 1;
 	if (!(inode->i_state & I_LOCK))
 		mark_inode_dirty_sync(inode);
 }


 /*
  * Pull the link count and size up from the xfs inode to the linux inode
  */
 STATIC void
 xfs_validate_fields(
 	struct inode	*ip,
 	bhv_vattr_t	*vattr)
 {
 	vattr->va_mask = XFS_AT_NLINK|XFS_AT_SIZE|XFS_AT_NBLOCKS;
 	if (!bhv_vop_getattr(vn_from_inode(ip), vattr, ATTR_LAZY, NULL)) {
 		ip->i_nlink = vattr->va_nlink;
 		ip->i_blocks = vattr->va_nblocks;

 		/* we're under i_sem so i_size can't change under us */
 		if (i_size_read(ip) != vattr->va_size)
 			i_size_write(ip, vattr->va_size);
 	}
 }

 /*
  * Hook in SELinux.  This is not quite correct yet, what we really need
  * here (as we do for default ACLs) is a mechanism by which creation of
  * these attrs can be journalled at inode creation time (along with the
  * inode, of course, such that log replay can't cause these to be lost).
  */
 STATIC int
 xfs_init_security(
 	bhv_vnode_t	*vp,
 	struct inode	*dir)
 {
 	struct inode	*ip = vn_to_inode(vp);
 	size_t		length;
 	void		*value;
 	char		*name;
 	int		error;

 	error = security_inode_init_security(ip, dir, &name, &value, &length);
 	if (error) {
 		if (error == -EOPNOTSUPP)
 			return 0;
 		return -error;
 	}

 	error = bhv_vop_attr_set(vp, name, value, length, ATTR_SECURE, NULL);
 	if (!error)
 		VMODIFY(vp);

 	kfree(name);
 	kfree(value);
 	return error;
 }

 /*
  * Determine whether a process has a valid fs_struct (kernel daemons
  * like knfsd don't have an fs_struct).
  *
  * XXX(hch):  nfsd is broken, better fix it instead.
  */
 STATIC_INLINE int
 xfs_has_fs_struct(struct task_struct *task)
 {
 	return (task->fs != init_task.fs);
 }

 STATIC void
 xfs_cleanup_inode(
 	bhv_vnode_t	*dvp,
 	bhv_vnode_t	*vp,
 	struct dentry	*dentry,
 	int		mode)
 {
 	struct dentry   teardown = {};

 	/* Oh, the horror.
 	 * If we can't add the ACL or we fail in
 	 * xfs_init_security we must back out.
 	 * ENOSPC can hit here, among other things.
 	 */
 	teardown.d_inode = vn_to_inode(vp);
 	teardown.d_name = dentry->d_name;

 	if (S_ISDIR(mode))
 	  	bhv_vop_rmdir(dvp, &teardown, NULL);
 	else
 		bhv_vop_remove(dvp, &teardown, NULL);
 	VN_RELE(vp);
 }

 STATIC int
 xfs_vn_mknod(
 	struct inode	*dir,
 	struct dentry	*dentry,
 	int		mode,
 	dev_t		rdev)
 {
 	struct inode	*ip;
 	bhv_vattr_t	vattr = { 0 };
 	bhv_vnode_t	*vp = NULL, *dvp = vn_from_inode(dir);
 	xfs_acl_t	*default_acl = NULL;
 	attrexists_t	test_default_acl = _ACL_DEFAULT_EXISTS;
 	int		error;

 	/*
 	 * Irix uses Missed'em'V split, but doesn't want to see
 	 * the upper 5 bits of (14bit) major.
 	 */
 	if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
 		return -EINVAL;

 	if (unlikely(test_default_acl && test_default_acl(dvp))) {
 		if (!_ACL_ALLOC(default_acl)) {
 			return -ENOMEM;
 		}
 		if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
 			_ACL_FREE(default_acl);
 			default_acl = NULL;
 		}
 	}

 	if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current))
 		mode &= ~current->fs->umask;

 	vattr.va_mask = XFS_AT_TYPE|XFS_AT_MODE;
 	vattr.va_mode = mode;

 	switch (mode & S_IFMT) {
 	case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
 		vattr.va_rdev = sysv_encode_dev(rdev);
 		vattr.va_mask |= XFS_AT_RDEV;
 		/*FALLTHROUGH*/
 	case S_IFREG:
 		error = bhv_vop_create(dvp, dentry, &vattr, &vp, NULL);
 		break;
 	case S_IFDIR:
 		error = bhv_vop_mkdir(dvp, dentry, &vattr, &vp, NULL);
 		break;
 	default:
 		error = EINVAL;
 		break;
 	}

 	if (unlikely(!error)) {
 		error = xfs_init_security(vp, dir);
 		if (error)
 			xfs_cleanup_inode(dvp, vp, dentry, mode);
 	}

 	if (unlikely(default_acl)) {
 		if (!error) {
 			error = _ACL_INHERIT(vp, &vattr, default_acl);
 			if (!error)
 				VMODIFY(vp);
 			else
 				xfs_cleanup_inode(dvp, vp, dentry, mode);
 		}
 		_ACL_FREE(default_acl);
 	}

 	if (likely(!error)) {
 		ASSERT(vp);
 		ip = vn_to_inode(vp);

 		if (S_ISCHR(mode) || S_ISBLK(mode))
 			ip->i_rdev = rdev;
 		else if (S_ISDIR(mode))
 			xfs_validate_fields(ip, &vattr);
 		d_instantiate(dentry, ip);
 		xfs_validate_fields(dir, &vattr);
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_create(
 	struct inode	*dir,
 	struct dentry	*dentry,
 	int		mode,
 	struct nameidata *nd)
 {
 	return xfs_vn_mknod(dir, dentry, mode, 0);
 }

 STATIC int
 xfs_vn_mkdir(
 	struct inode	*dir,
 	struct dentry	*dentry,
 	int		mode)
 {
 	return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
 }

 STATIC struct dentry *
 xfs_vn_lookup(
 	struct inode	*dir,
 	struct dentry	*dentry,
 	struct nameidata *nd)
 {
 	bhv_vnode_t	*vp = vn_from_inode(dir), *cvp;
 	int		error;

 	if (dentry->d_name.len >= MAXNAMELEN)
 		return ERR_PTR(-ENAMETOOLONG);

 	error = bhv_vop_lookup(vp, dentry, &cvp, 0, NULL, NULL);
 	if (unlikely(error)) {
 		if (unlikely(error != ENOENT))
 			return ERR_PTR(-error);
 		d_add(dentry, NULL);
 		return NULL;
 	}

 	return d_splice_alias(vn_to_inode(cvp), dentry);
 }

 STATIC int
 xfs_vn_link(
 	struct dentry	*old_dentry,
 	struct inode	*dir,
 	struct dentry	*dentry)
 {
 	struct inode	*ip;	/* inode of guy being linked to */
 	bhv_vnode_t	*tdvp;	/* target directory for new name/link */
 	bhv_vnode_t	*vp;	/* vp of name being linked */
 	bhv_vattr_t	vattr;
 	int		error;

 	ip = old_dentry->d_inode;	/* inode being linked to */
 	tdvp = vn_from_inode(dir);
 	vp = vn_from_inode(ip);

 	VN_HOLD(vp);
 	error = bhv_vop_link(tdvp, vp, dentry, NULL);
 	if (unlikely(error)) {
 		VN_RELE(vp);
 	} else {
 		VMODIFY(tdvp);
 		xfs_validate_fields(ip, &vattr);
 		d_instantiate(dentry, ip);
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_unlink(
 	struct inode	*dir,
 	struct dentry	*dentry)
 {
 	struct inode	*inode;
 	bhv_vnode_t	*dvp;	/* directory containing name to remove */
 	bhv_vattr_t	vattr;
 	int		error;

 	inode = dentry->d_inode;
 	dvp = vn_from_inode(dir);

 	error = bhv_vop_remove(dvp, dentry, NULL);
 	if (likely(!error)) {
 		xfs_validate_fields(dir, &vattr);	/* size needs update */
 		xfs_validate_fields(inode, &vattr);
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_symlink(
 	struct inode	*dir,
 	struct dentry	*dentry,
 	const char	*symname)
 {
 	struct inode	*ip;
 	bhv_vattr_t	va = { 0 };
 	bhv_vnode_t	*dvp;	/* directory containing name of symlink */
 	bhv_vnode_t	*cvp;	/* used to lookup symlink to put in dentry */
 	int		error;

 	dvp = vn_from_inode(dir);
 	cvp = NULL;

 	va.va_mode = S_IFLNK |
 		(irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
 	va.va_mask = XFS_AT_TYPE|XFS_AT_MODE;

 	error = bhv_vop_symlink(dvp, dentry, &va, (char *)symname, &cvp, NULL);
 	if (likely(!error && cvp)) {
 		error = xfs_init_security(cvp, dir);
 		if (likely(!error)) {
 			ip = vn_to_inode(cvp);
 			d_instantiate(dentry, ip);
 			xfs_validate_fields(dir, &va);
 			xfs_validate_fields(ip, &va);
 		} else {
 			xfs_cleanup_inode(dvp, cvp, dentry, 0);
 		}
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_rmdir(
 	struct inode	*dir,
 	struct dentry	*dentry)
 {
 	struct inode	*inode = dentry->d_inode;
 	bhv_vnode_t	*dvp = vn_from_inode(dir);
 	bhv_vattr_t	vattr;
 	int		error;

 	error = bhv_vop_rmdir(dvp, dentry, NULL);
 	if (likely(!error)) {
 		xfs_validate_fields(inode, &vattr);
 		xfs_validate_fields(dir, &vattr);
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_rename(
 	struct inode	*odir,
 	struct dentry	*odentry,
 	struct inode	*ndir,
 	struct dentry	*ndentry)
 {
 	struct inode	*new_inode = ndentry->d_inode;
 	bhv_vnode_t	*fvp;	/* from directory */
 	bhv_vnode_t	*tvp;	/* target directory */
 	bhv_vattr_t	vattr;
 	int		error;

 	fvp = vn_from_inode(odir);
 	tvp = vn_from_inode(ndir);

 	error = bhv_vop_rename(fvp, odentry, tvp, ndentry, NULL);
 	if (likely(!error)) {
 		if (new_inode)
 			xfs_validate_fields(new_inode, &vattr);
 		xfs_validate_fields(odir, &vattr);
 		if (ndir != odir)
 			xfs_validate_fields(ndir, &vattr);
 	}
 	return -error;
 }

 /*
  * careful here - this function can get called recursively, so
  * we need to be very careful about how much stack we use.
  * uio is kmalloced for this reason...
  */
 STATIC void *
 xfs_vn_follow_link(
 	struct dentry		*dentry,
 	struct nameidata	*nd)
 {
 	bhv_vnode_t		*vp;
 	uio_t			*uio;
 	iovec_t			iov;
 	int			error;
 	char			*link;

 	ASSERT(dentry);
 	ASSERT(nd);

 	link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
 	if (!link) {
 		nd_set_link(nd, ERR_PTR(-ENOMEM));
 		return NULL;
 	}

 	uio = kmalloc(sizeof(uio_t), GFP_KERNEL);
 	if (!uio) {
 		kfree(link);
 		nd_set_link(nd, ERR_PTR(-ENOMEM));
 		return NULL;
 	}

 	vp = vn_from_inode(dentry->d_inode);

 	iov.iov_base = link;
 	iov.iov_len = MAXPATHLEN;

 	uio->uio_iov = &iov;
 	uio->uio_offset = 0;
 	uio->uio_segflg = UIO_SYSSPACE;
 	uio->uio_resid = MAXPATHLEN;
 	uio->uio_iovcnt = 1;

 	error = bhv_vop_readlink(vp, uio, 0, NULL);
 	if (unlikely(error)) {
 		kfree(link);
 		link = ERR_PTR(-error);
 	} else {
 		link[MAXPATHLEN - uio->uio_resid] = '\0';
 	}
 	kfree(uio);

 	nd_set_link(nd, link);
 	return NULL;
 }

 STATIC void
 xfs_vn_put_link(
 	struct dentry	*dentry,
 	struct nameidata *nd,
 	void		*p)
 {
 	char		*s = nd_get_link(nd);

 	if (!IS_ERR(s))
 		kfree(s);
 }

 #ifdef CONFIG_XFS_POSIX_ACL
 STATIC int
 xfs_vn_permission(
 	struct inode	*inode,
 	int		mode,
 	struct nameidata *nd)
 {
 	return -bhv_vop_access(vn_from_inode(inode), mode << 6, NULL);
 }
 #else
 #define xfs_vn_permission NULL
 #endif

 STATIC int
 xfs_vn_getattr(
 	struct vfsmount	*mnt,
 	struct dentry	*dentry,
 	struct kstat	*stat)
 {
 	struct inode	*inode = dentry->d_inode;
 	bhv_vnode_t	*vp = vn_from_inode(inode);
 	bhv_vattr_t	vattr = { .va_mask = XFS_AT_STAT };
 	int		error;

 	error = bhv_vop_getattr(vp, &vattr, ATTR_LAZY, NULL);
 	if (likely(!error)) {
 		stat->size = i_size_read(inode);
 		stat->dev = inode->i_sb->s_dev;
 		stat->rdev = (vattr.va_rdev == 0) ? 0 :
 				MKDEV(sysv_major(vattr.va_rdev) & 0x1ff,
 				      sysv_minor(vattr.va_rdev));
 		stat->mode = vattr.va_mode;
 		stat->nlink = vattr.va_nlink;
 		stat->uid = vattr.va_uid;
 		stat->gid = vattr.va_gid;
 		stat->ino = vattr.va_nodeid;
 		stat->atime = vattr.va_atime;
 		stat->mtime = vattr.va_mtime;
 		stat->ctime = vattr.va_ctime;
 		stat->blocks = vattr.va_nblocks;
 		stat->blksize = vattr.va_blocksize;
 	}
 	return -error;
 }

 STATIC int
 xfs_vn_setattr(
 	struct dentry	*dentry,
 	struct iattr	*attr)
 {
 	struct inode	*inode = dentry->d_inode;
 	unsigned int	ia_valid = attr->ia_valid;
 	bhv_vnode_t	*vp = vn_from_inode(inode);
 	bhv_vattr_t	vattr = { 0 };
 	int		flags = 0;
 	int		error;

 	if (ia_valid & ATTR_UID) {
 		vattr.va_mask |= XFS_AT_UID;
 		vattr.va_uid = attr->ia_uid;
 	}
 	if (ia_valid & ATTR_GID) {
 		vattr.va_mask |= XFS_AT_GID;
 		vattr.va_gid = attr->ia_gid;
 	}
 	if (ia_valid & ATTR_SIZE) {
 		vattr.va_mask |= XFS_AT_SIZE;
 		vattr.va_size = attr->ia_size;
 	}
 	if (ia_valid & ATTR_ATIME) {
 		vattr.va_mask |= XFS_AT_ATIME;
 		vattr.va_atime = attr->ia_atime;
 		inode->i_atime = attr->ia_atime;
 	}
 	if (ia_valid & ATTR_MTIME) {
 		vattr.va_mask |= XFS_AT_MTIME;
 		vattr.va_mtime = attr->ia_mtime;
 	}
 	if (ia_valid & ATTR_CTIME) {
 		vattr.va_mask |= XFS_AT_CTIME;
 		vattr.va_ctime = attr->ia_ctime;
 	}
 	if (ia_valid & ATTR_MODE) {
 		vattr.va_mask |= XFS_AT_MODE;
 		vattr.va_mode = attr->ia_mode;
 		if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
 			inode->i_mode &= ~S_ISGID;
 	}

 	if (ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET))
 		flags |= ATTR_UTIME;
 #ifdef ATTR_NO_BLOCK
 	if ((ia_valid & ATTR_NO_BLOCK))
 		flags |= ATTR_NONBLOCK;
 #endif

 	error = bhv_vop_setattr(vp, &vattr, flags, NULL);
 	if (likely(!error))
 		__vn_revalidate(vp, &vattr);
 	return -error;
 }

 STATIC void
 xfs_vn_truncate(
 	struct inode	*inode)
 {
 	block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
 }

 STATIC int
 xfs_vn_setxattr(
 	struct dentry	*dentry,
 	const char	*name,
 	const void	*data,
 	size_t		size,
 	int		flags)
 {
 	bhv_vnode_t	*vp = vn_from_inode(dentry->d_inode);
 	char		*attr = (char *)name;
 	attrnames_t	*namesp;
 	int		xflags = 0;
 	int		error;

 	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 	if (!namesp)
 		return -EOPNOTSUPP;
 	attr += namesp->attr_namelen;
 	error = namesp->attr_capable(vp, NULL);
 	if (error)
 		return error;

 	/* Convert Linux syscall to XFS internal ATTR flags */
 	if (flags & XATTR_CREATE)
 		xflags |= ATTR_CREATE;
 	if (flags & XATTR_REPLACE)
 		xflags |= ATTR_REPLACE;
 	xflags |= namesp->attr_flag;
 	return namesp->attr_set(vp, attr, (void *)data, size, xflags);
 }

 STATIC ssize_t
 xfs_vn_getxattr(
 	struct dentry	*dentry,
 	const char	*name,
 	void		*data,
 	size_t		size)
 {
 	bhv_vnode_t	*vp = vn_from_inode(dentry->d_inode);
 	char		*attr = (char *)name;
 	attrnames_t	*namesp;
 	int		xflags = 0;
 	ssize_t		error;

 	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 	if (!namesp)
 		return -EOPNOTSUPP;
 	attr += namesp->attr_namelen;
 	error = namesp->attr_capable(vp, NULL);
 	if (error)
 		return error;

 	/* Convert Linux syscall to XFS internal ATTR flags */
 	if (!size) {
 		xflags |= ATTR_KERNOVAL;
 		data = NULL;
 	}
 	xflags |= namesp->attr_flag;
 	return namesp->attr_get(vp, attr, (void *)data, size, xflags);
 }

 STATIC ssize_t
 xfs_vn_listxattr(
 	struct dentry		*dentry,
 	char			*data,
 	size_t			size)
 {
 	bhv_vnode_t		*vp = vn_from_inode(dentry->d_inode);
 	int			error, xflags = ATTR_KERNAMELS;
 	ssize_t			result;

 	if (!size)
 		xflags |= ATTR_KERNOVAL;
 	xflags |= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;

 	error = attr_generic_list(vp, data, size, xflags, &result);
 	if (error < 0)
 		return error;
 	return result;
 }

 STATIC int
 xfs_vn_removexattr(
 	struct dentry	*dentry,
 	const char	*name)
 {
 	bhv_vnode_t	*vp = vn_from_inode(dentry->d_inode);
 	char		*attr = (char *)name;
 	attrnames_t	*namesp;
 	int		xflags = 0;
 	int		error;

 	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
 	if (!namesp)
 		return -EOPNOTSUPP;
 	attr += namesp->attr_namelen;
 	error = namesp->attr_capable(vp, NULL);
 	if (error)
 		return error;
 	xflags |= namesp->attr_flag;
 	return namesp->attr_remove(vp, attr, xflags);
 }


 const struct inode_operations xfs_inode_operations = {
 	.permission		= xfs_vn_permission,
 	.truncate		= xfs_vn_truncate,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
 	.setxattr		= xfs_vn_setxattr,
 	.getxattr		= xfs_vn_getxattr,
 	.listxattr		= xfs_vn_listxattr,
 	.removexattr		= xfs_vn_removexattr,
 };

 const struct inode_operations xfs_dir_inode_operations = {
 	.create			= xfs_vn_create,
 	.lookup			= xfs_vn_lookup,
 	.link			= xfs_vn_link,
 	.unlink			= xfs_vn_unlink,
 	.symlink		= xfs_vn_symlink,
 	.mkdir			= xfs_vn_mkdir,
 	.rmdir			= xfs_vn_rmdir,
 	.mknod			= xfs_vn_mknod,
 	.rename			= xfs_vn_rename,
 	.permission		= xfs_vn_permission,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
 	.setxattr		= xfs_vn_setxattr,
 	.getxattr		= xfs_vn_getxattr,
 	.listxattr		= xfs_vn_listxattr,
 	.removexattr		= xfs_vn_removexattr,
 };

 const struct inode_operations xfs_symlink_inode_operations = {
 	.readlink		= generic_readlink,
 	.follow_link		= xfs_vn_follow_link,
 	.put_link		= xfs_vn_put_link,
 	.permission		= xfs_vn_permission,
 	.getattr		= xfs_vn_getattr,
 	.setattr		= xfs_vn_setattr,
 	.setxattr		= xfs_vn_setxattr,
 	.getxattr		= xfs_vn_getxattr,
 	.listxattr		= xfs_vn_listxattr,
 	.removexattr		= xfs_vn_removexattr,
 };
	/*
	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
	* All Rights Reserved.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation.
	*
	* This program is distributed in the hope that it would be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	*/
	#include "xfs.h"
	#include "xfs_fs.h"
	#include "xfs_bit.h"
	#include "xfs_log.h"
	#include "xfs_inum.h"
	#include "xfs_trans.h"
	#include "xfs_sb.h"
	#include "xfs_ag.h"
	#include "xfs_dir2.h"
	#include "xfs_alloc.h"
	#include "xfs_dmapi.h"
	#include "xfs_quota.h"
	#include "xfs_mount.h"
	#include "xfs_bmap_btree.h"
	#include "xfs_alloc_btree.h"
	#include "xfs_ialloc_btree.h"
	#include "xfs_dir2_sf.h"
	#include "xfs_attr_sf.h"
	#include "xfs_dinode.h"
	#include "xfs_inode.h"
	#include "xfs_bmap.h"
	#include "xfs_btree.h"
	#include "xfs_ialloc.h"
	#include "xfs_rtalloc.h"
	#include "xfs_error.h"
	#include "xfs_itable.h"
	#include "xfs_rw.h"
	#include "xfs_acl.h"
	#include "xfs_attr.h"
	#include "xfs_buf_item.h"
	#include "xfs_utils.h"

	#include <linux/capability.h>
	#include <linux/xattr.h>
	#include <linux/namei.h>
	#include <linux/security.h>

	/*
	* Get a XFS inode from a given vnode.
	*/
	xfs_inode_t *
	xfs_vtoi(
	bhv_vnode_t *vp)
	{
	bhv_desc_t *bdp;

	bdp = bhv_lookup_range(VN_BHV_HEAD(vp),
	VNODE_POSITION_XFS, VNODE_POSITION_XFS);
	if (unlikely(bdp == NULL))
	return NULL;
	return XFS_BHVTOI(bdp);
	}

	/*
	* Bring the atime in the XFS inode uptodate.
	* Used before logging the inode to disk or when the Linux inode goes away.
	*/
	void
	xfs_synchronize_atime(
	xfs_inode_t *ip)
	{
	bhv_vnode_t *vp;

	vp = XFS_ITOV_NULL(ip);
	if (vp) {
	struct inode *inode = &vp->v_inode;
	ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
	ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
	}
	}

	/*
	* Change the requested timestamp in the given inode.
	* We don't lock across timestamp updates, and we don't log them but
	* we do record the fact that there is dirty information in core.
	*
	* NOTE -- callers MUST combine XFS_ICHGTIME_MOD or XFS_ICHGTIME_CHG
	* with XFS_ICHGTIME_ACC to be sure that access time
	* update will take. Calling first with XFS_ICHGTIME_ACC
	* and then XFS_ICHGTIME_MOD may fail to modify the access
	* timestamp if the filesystem is mounted noacctm.
	*/
	void
	xfs_ichgtime(
	xfs_inode_t *ip,
	int flags)
	{
	struct inode *inode = vn_to_inode(XFS_ITOV(ip));
	timespec_t tv;

	nanotime(&tv);
	if (flags & XFS_ICHGTIME_MOD) {
	inode->i_mtime = tv;
	ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
	ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
	}
	if (flags & XFS_ICHGTIME_ACC) {
	inode->i_atime = tv;
	ip->i_d.di_atime.t_sec = (__int32_t)tv.tv_sec;
	ip->i_d.di_atime.t_nsec = (__int32_t)tv.tv_nsec;
	}
	if (flags & XFS_ICHGTIME_CHG) {
	inode->i_ctime = tv;
	ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
	ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
	}

	/*
	* We update the i_update_core field _after_ changing
	* the timestamps in order to coordinate properly with
	* xfs_iflush() so that we don't lose timestamp updates.
	* This keeps us from having to hold the inode lock
	* while doing this. We use the SYNCHRONIZE macro to
	* ensure that the compiler does not reorder the update
	* of i_update_core above the timestamp updates above.
	*/
	SYNCHRONIZE();
	ip->i_update_core = 1;
	if (!(inode->i_state & I_LOCK))
	mark_inode_dirty_sync(inode);
	}

	/*
	* Variant on the above which avoids querying the system clock
	* in situations where we know the Linux inode timestamps have
	* just been updated (and so we can update our inode cheaply).
	*/
	void
	xfs_ichgtime_fast(
	xfs_inode_t *ip,
	struct inode *inode,
	int flags)
	{
	timespec_t *tvp;

	/*
	* Atime updates for read() & friends are handled lazily now, and
	* explicit updates must go through xfs_ichgtime()
	*/
	ASSERT((flags & XFS_ICHGTIME_ACC) == 0);

	/*
	* We're not supposed to change timestamps in readonly-mounted
	* filesystems. Throw it away if anyone asks us.
	*/
	if (unlikely(IS_RDONLY(inode)))
	return;

	if (flags & XFS_ICHGTIME_MOD) {
	tvp = &inode->i_mtime;
	ip->i_d.di_mtime.t_sec = (__int32_t)tvp->tv_sec;
	ip->i_d.di_mtime.t_nsec = (__int32_t)tvp->tv_nsec;
	}
	if (flags & XFS_ICHGTIME_CHG) {
	tvp = &inode->i_ctime;
	ip->i_d.di_ctime.t_sec = (__int32_t)tvp->tv_sec;
	ip->i_d.di_ctime.t_nsec = (__int32_t)tvp->tv_nsec;
	}

	/*
	* We update the i_update_core field _after_ changing
	* the timestamps in order to coordinate properly with
	* xfs_iflush() so that we don't lose timestamp updates.
	* This keeps us from having to hold the inode lock
	* while doing this. We use the SYNCHRONIZE macro to
	* ensure that the compiler does not reorder the update
	* of i_update_core above the timestamp updates above.
	*/
	SYNCHRONIZE();
	ip->i_update_core = 1;
	if (!(inode->i_state & I_LOCK))
	mark_inode_dirty_sync(inode);
	}


	/*
	* Pull the link count and size up from the xfs inode to the linux inode
	*/
	STATIC void
	xfs_validate_fields(
	struct inode *ip,
	bhv_vattr_t *vattr)
	{
	vattr->va_mask = XFS_AT_NLINK\|XFS_AT_SIZE\|XFS_AT_NBLOCKS;
	if (!bhv_vop_getattr(vn_from_inode(ip), vattr, ATTR_LAZY, NULL)) {
	ip->i_nlink = vattr->va_nlink;
	ip->i_blocks = vattr->va_nblocks;

	/* we're under i_sem so i_size can't change under us */
	if (i_size_read(ip) != vattr->va_size)
	i_size_write(ip, vattr->va_size);
	}
	}

	/*
	* Hook in SELinux. This is not quite correct yet, what we really need
	* here (as we do for default ACLs) is a mechanism by which creation of
	* these attrs can be journalled at inode creation time (along with the
	* inode, of course, such that log replay can't cause these to be lost).
	*/
	STATIC int
	xfs_init_security(
	bhv_vnode_t *vp,
	struct inode *dir)
	{
	struct inode *ip = vn_to_inode(vp);
	size_t length;
	void *value;
	char *name;
	int error;

	error = security_inode_init_security(ip, dir, &name, &value, &length);
	if (error) {
	if (error == -EOPNOTSUPP)
	return 0;
	return -error;
	}

	error = bhv_vop_attr_set(vp, name, value, length, ATTR_SECURE, NULL);
	if (!error)
	VMODIFY(vp);

	kfree(name);
	kfree(value);
	return error;
	}

	/*
	* Determine whether a process has a valid fs_struct (kernel daemons
	* like knfsd don't have an fs_struct).
	*
	* XXX(hch): nfsd is broken, better fix it instead.
	*/
	STATIC_INLINE int
	xfs_has_fs_struct(struct task_struct *task)
	{
	return (task->fs != init_task.fs);
	}

	STATIC void
	xfs_cleanup_inode(
	bhv_vnode_t *dvp,
	bhv_vnode_t *vp,
	struct dentry *dentry,
	int mode)
	{
	struct dentry teardown = {};

	/* Oh, the horror.
	* If we can't add the ACL or we fail in
	* xfs_init_security we must back out.
	* ENOSPC can hit here, among other things.
	*/
	teardown.d_inode = vn_to_inode(vp);
	teardown.d_name = dentry->d_name;

	if (S_ISDIR(mode))
	bhv_vop_rmdir(dvp, &teardown, NULL);
	else
	bhv_vop_remove(dvp, &teardown, NULL);
	VN_RELE(vp);
	}

	STATIC int
	xfs_vn_mknod(
	struct inode *dir,
	struct dentry *dentry,
	int mode,
	dev_t rdev)
	{
	struct inode *ip;
	bhv_vattr_t vattr = { 0 };
	bhv_vnode_t vp = NULL, dvp = vn_from_inode(dir);
	xfs_acl_t *default_acl = NULL;
	attrexists_t test_default_acl = _ACL_DEFAULT_EXISTS;
	int error;

	/*
	* Irix uses Missed'em'V split, but doesn't want to see
	* the upper 5 bits of (14bit) major.
	*/
	if (unlikely(!sysv_valid_dev(rdev) \|\| MAJOR(rdev) & ~0x1ff))
	return -EINVAL;

	if (unlikely(test_default_acl && test_default_acl(dvp))) {
	if (!_ACL_ALLOC(default_acl)) {
	return -ENOMEM;
	}
	if (!_ACL_GET_DEFAULT(dvp, default_acl)) {
	_ACL_FREE(default_acl);
	default_acl = NULL;
	}
	}

	if (IS_POSIXACL(dir) && !default_acl && xfs_has_fs_struct(current))
	mode &= ~current->fs->umask;

	vattr.va_mask = XFS_AT_TYPE\|XFS_AT_MODE;
	vattr.va_mode = mode;

	switch (mode & S_IFMT) {
	case S_IFCHR: case S_IFBLK: case S_IFIFO: case S_IFSOCK:
	vattr.va_rdev = sysv_encode_dev(rdev);
	vattr.va_mask \|= XFS_AT_RDEV;
	/FALLTHROUGH/
	case S_IFREG:
	error = bhv_vop_create(dvp, dentry, &vattr, &vp, NULL);
	break;
	case S_IFDIR:
	error = bhv_vop_mkdir(dvp, dentry, &vattr, &vp, NULL);
	break;
	default:
	error = EINVAL;
	break;
	}

	if (unlikely(!error)) {
	error = xfs_init_security(vp, dir);
	if (error)
	xfs_cleanup_inode(dvp, vp, dentry, mode);
	}

	if (unlikely(default_acl)) {
	if (!error) {
	error = _ACL_INHERIT(vp, &vattr, default_acl);
	if (!error)
	VMODIFY(vp);
	else
	xfs_cleanup_inode(dvp, vp, dentry, mode);
	}
	_ACL_FREE(default_acl);
	}

	if (likely(!error)) {
	ASSERT(vp);
	ip = vn_to_inode(vp);

	if (S_ISCHR(mode) \|\| S_ISBLK(mode))
	ip->i_rdev = rdev;
	else if (S_ISDIR(mode))
	xfs_validate_fields(ip, &vattr);
	d_instantiate(dentry, ip);
	xfs_validate_fields(dir, &vattr);
	}
	return -error;
	}

	STATIC int
	xfs_vn_create(
	struct inode *dir,
	struct dentry *dentry,
	int mode,
	struct nameidata *nd)
	{
	return xfs_vn_mknod(dir, dentry, mode, 0);
	}

	STATIC int
	xfs_vn_mkdir(
	struct inode *dir,
	struct dentry *dentry,
	int mode)
	{
	return xfs_vn_mknod(dir, dentry, mode\|S_IFDIR, 0);
	}

	STATIC struct dentry *
	xfs_vn_lookup(
	struct inode *dir,
	struct dentry *dentry,
	struct nameidata *nd)
	{
	bhv_vnode_t vp = vn_from_inode(dir), cvp;
	int error;

	if (dentry->d_name.len >= MAXNAMELEN)
	return ERR_PTR(-ENAMETOOLONG);

	error = bhv_vop_lookup(vp, dentry, &cvp, 0, NULL, NULL);
	if (unlikely(error)) {
	if (unlikely(error != ENOENT))
	return ERR_PTR(-error);
	d_add(dentry, NULL);
	return NULL;
	}

	return d_splice_alias(vn_to_inode(cvp), dentry);
	}

	STATIC int
	xfs_vn_link(
	struct dentry *old_dentry,
	struct inode *dir,
	struct dentry *dentry)
	{
	struct inode ip; / inode of guy being linked to */
	bhv_vnode_t tdvp; / target directory for new name/link */
	bhv_vnode_t vp; / vp of name being linked */
	bhv_vattr_t vattr;
	int error;

	ip = old_dentry->d_inode; /* inode being linked to */
	tdvp = vn_from_inode(dir);
	vp = vn_from_inode(ip);

	VN_HOLD(vp);
	error = bhv_vop_link(tdvp, vp, dentry, NULL);
	if (unlikely(error)) {
	VN_RELE(vp);
	} else {
	VMODIFY(tdvp);
	xfs_validate_fields(ip, &vattr);
	d_instantiate(dentry, ip);
	}
	return -error;
	}

	STATIC int
	xfs_vn_unlink(
	struct inode *dir,
	struct dentry *dentry)
	{
	struct inode *inode;
	bhv_vnode_t dvp; / directory containing name to remove */
	bhv_vattr_t vattr;
	int error;

	inode = dentry->d_inode;
	dvp = vn_from_inode(dir);

	error = bhv_vop_remove(dvp, dentry, NULL);
	if (likely(!error)) {
	xfs_validate_fields(dir, &vattr); /* size needs update */
	xfs_validate_fields(inode, &vattr);
	}
	return -error;
	}

	STATIC int
	xfs_vn_symlink(
	struct inode *dir,
	struct dentry *dentry,
	const char *symname)
	{
	struct inode *ip;
	bhv_vattr_t va = { 0 };
	bhv_vnode_t dvp; / directory containing name of symlink */
	bhv_vnode_t cvp; / used to lookup symlink to put in dentry */
	int error;

	dvp = vn_from_inode(dir);
	cvp = NULL;

	va.va_mode = S_IFLNK \|
	(irix_symlink_mode ? 0777 & ~current->fs->umask : S_IRWXUGO);
	va.va_mask = XFS_AT_TYPE\|XFS_AT_MODE;

	error = bhv_vop_symlink(dvp, dentry, &va, (char *)symname, &cvp, NULL);
	if (likely(!error && cvp)) {
	error = xfs_init_security(cvp, dir);
	if (likely(!error)) {
	ip = vn_to_inode(cvp);
	d_instantiate(dentry, ip);
	xfs_validate_fields(dir, &va);
	xfs_validate_fields(ip, &va);
	} else {
	xfs_cleanup_inode(dvp, cvp, dentry, 0);
	}
	}
	return -error;
	}

	STATIC int
	xfs_vn_rmdir(
	struct inode *dir,
	struct dentry *dentry)
	{
	struct inode *inode = dentry->d_inode;
	bhv_vnode_t *dvp = vn_from_inode(dir);
	bhv_vattr_t vattr;
	int error;

	error = bhv_vop_rmdir(dvp, dentry, NULL);
	if (likely(!error)) {
	xfs_validate_fields(inode, &vattr);
	xfs_validate_fields(dir, &vattr);
	}
	return -error;
	}

	STATIC int
	xfs_vn_rename(
	struct inode *odir,
	struct dentry *odentry,
	struct inode *ndir,
	struct dentry *ndentry)
	{
	struct inode *new_inode = ndentry->d_inode;
	bhv_vnode_t fvp; / from directory */
	bhv_vnode_t tvp; / target directory */
	bhv_vattr_t vattr;
	int error;

	fvp = vn_from_inode(odir);
	tvp = vn_from_inode(ndir);

	error = bhv_vop_rename(fvp, odentry, tvp, ndentry, NULL);
	if (likely(!error)) {
	if (new_inode)
	xfs_validate_fields(new_inode, &vattr);
	xfs_validate_fields(odir, &vattr);
	if (ndir != odir)
	xfs_validate_fields(ndir, &vattr);
	}
	return -error;
	}

	/*
	* careful here - this function can get called recursively, so
	* we need to be very careful about how much stack we use.
	* uio is kmalloced for this reason...
	*/
	STATIC void *
	xfs_vn_follow_link(
	struct dentry *dentry,
	struct nameidata *nd)
	{
	bhv_vnode_t *vp;
	uio_t *uio;
	iovec_t iov;
	int error;
	char *link;

	ASSERT(dentry);
	ASSERT(nd);

	link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
	if (!link) {
	nd_set_link(nd, ERR_PTR(-ENOMEM));
	return NULL;
	}

	uio = kmalloc(sizeof(uio_t), GFP_KERNEL);
	if (!uio) {
	kfree(link);
	nd_set_link(nd, ERR_PTR(-ENOMEM));
	return NULL;
	}

	vp = vn_from_inode(dentry->d_inode);

	iov.iov_base = link;
	iov.iov_len = MAXPATHLEN;

	uio->uio_iov = &iov;
	uio->uio_offset = 0;
	uio->uio_segflg = UIO_SYSSPACE;
	uio->uio_resid = MAXPATHLEN;
	uio->uio_iovcnt = 1;

	error = bhv_vop_readlink(vp, uio, 0, NULL);
	if (unlikely(error)) {
	kfree(link);
	link = ERR_PTR(-error);
	} else {
	link[MAXPATHLEN - uio->uio_resid] = '\0';
	}
	kfree(uio);

	nd_set_link(nd, link);
	return NULL;
	}

	STATIC void
	xfs_vn_put_link(
	struct dentry *dentry,
	struct nameidata *nd,
	void *p)
	{
	char *s = nd_get_link(nd);

	if (!IS_ERR(s))
	kfree(s);
	}

	#ifdef CONFIG_XFS_POSIX_ACL
	STATIC int
	xfs_vn_permission(
	struct inode *inode,
	int mode,
	struct nameidata *nd)
	{
	return -bhv_vop_access(vn_from_inode(inode), mode << 6, NULL);
	}
	#else
	#define xfs_vn_permission NULL
	#endif

	STATIC int
	xfs_vn_getattr(
	struct vfsmount *mnt,
	struct dentry *dentry,
	struct kstat *stat)
	{
	struct inode *inode = dentry->d_inode;
	bhv_vnode_t *vp = vn_from_inode(inode);
	bhv_vattr_t vattr = { .va_mask = XFS_AT_STAT };
	int error;

	error = bhv_vop_getattr(vp, &vattr, ATTR_LAZY, NULL);
	if (likely(!error)) {
	stat->size = i_size_read(inode);
	stat->dev = inode->i_sb->s_dev;
	stat->rdev = (vattr.va_rdev == 0) ? 0 :
	MKDEV(sysv_major(vattr.va_rdev) & 0x1ff,
	sysv_minor(vattr.va_rdev));
	stat->mode = vattr.va_mode;
	stat->nlink = vattr.va_nlink;
	stat->uid = vattr.va_uid;
	stat->gid = vattr.va_gid;
	stat->ino = vattr.va_nodeid;
	stat->atime = vattr.va_atime;
	stat->mtime = vattr.va_mtime;
	stat->ctime = vattr.va_ctime;
	stat->blocks = vattr.va_nblocks;
	stat->blksize = vattr.va_blocksize;
	}
	return -error;
	}

	STATIC int
	xfs_vn_setattr(
	struct dentry *dentry,
	struct iattr *attr)
	{
	struct inode *inode = dentry->d_inode;
	unsigned int ia_valid = attr->ia_valid;
	bhv_vnode_t *vp = vn_from_inode(inode);
	bhv_vattr_t vattr = { 0 };
	int flags = 0;
	int error;

	if (ia_valid & ATTR_UID) {
	vattr.va_mask \|= XFS_AT_UID;
	vattr.va_uid = attr->ia_uid;
	}
	if (ia_valid & ATTR_GID) {
	vattr.va_mask \|= XFS_AT_GID;
	vattr.va_gid = attr->ia_gid;
	}
	if (ia_valid & ATTR_SIZE) {
	vattr.va_mask \|= XFS_AT_SIZE;
	vattr.va_size = attr->ia_size;
	}
	if (ia_valid & ATTR_ATIME) {
	vattr.va_mask \|= XFS_AT_ATIME;
	vattr.va_atime = attr->ia_atime;
	inode->i_atime = attr->ia_atime;
	}
	if (ia_valid & ATTR_MTIME) {
	vattr.va_mask \|= XFS_AT_MTIME;
	vattr.va_mtime = attr->ia_mtime;
	}
	if (ia_valid & ATTR_CTIME) {
	vattr.va_mask \|= XFS_AT_CTIME;
	vattr.va_ctime = attr->ia_ctime;
	}
	if (ia_valid & ATTR_MODE) {
	vattr.va_mask \|= XFS_AT_MODE;
	vattr.va_mode = attr->ia_mode;
	if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
	inode->i_mode &= ~S_ISGID;
	}

	if (ia_valid & (ATTR_MTIME_SET \| ATTR_ATIME_SET))
	flags \|= ATTR_UTIME;
	#ifdef ATTR_NO_BLOCK
	if ((ia_valid & ATTR_NO_BLOCK))
	flags \|= ATTR_NONBLOCK;
	#endif

	error = bhv_vop_setattr(vp, &vattr, flags, NULL);
	if (likely(!error))
	__vn_revalidate(vp, &vattr);
	return -error;
	}

	STATIC void
	xfs_vn_truncate(
	struct inode *inode)
	{
	block_truncate_page(inode->i_mapping, inode->i_size, xfs_get_blocks);
	}

	STATIC int
	xfs_vn_setxattr(
	struct dentry *dentry,
	const char *name,
	const void *data,
	size_t size,
	int flags)
	{
	bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
	char attr = (char )name;
	attrnames_t *namesp;
	int xflags = 0;
	int error;

	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
	if (!namesp)
	return -EOPNOTSUPP;
	attr += namesp->attr_namelen;
	error = namesp->attr_capable(vp, NULL);
	if (error)
	return error;

	/* Convert Linux syscall to XFS internal ATTR flags */
	if (flags & XATTR_CREATE)
	xflags \|= ATTR_CREATE;
	if (flags & XATTR_REPLACE)
	xflags \|= ATTR_REPLACE;
	xflags \|= namesp->attr_flag;
	return namesp->attr_set(vp, attr, (void *)data, size, xflags);
	}

	STATIC ssize_t
	xfs_vn_getxattr(
	struct dentry *dentry,
	const char *name,
	void *data,
	size_t size)
	{
	bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
	char attr = (char )name;
	attrnames_t *namesp;
	int xflags = 0;
	ssize_t error;

	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
	if (!namesp)
	return -EOPNOTSUPP;
	attr += namesp->attr_namelen;
	error = namesp->attr_capable(vp, NULL);
	if (error)
	return error;

	/* Convert Linux syscall to XFS internal ATTR flags */
	if (!size) {
	xflags \|= ATTR_KERNOVAL;
	data = NULL;
	}
	xflags \|= namesp->attr_flag;
	return namesp->attr_get(vp, attr, (void *)data, size, xflags);
	}

	STATIC ssize_t
	xfs_vn_listxattr(
	struct dentry *dentry,
	char *data,
	size_t size)
	{
	bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
	int error, xflags = ATTR_KERNAMELS;
	ssize_t result;

	if (!size)
	xflags \|= ATTR_KERNOVAL;
	xflags \|= capable(CAP_SYS_ADMIN) ? ATTR_KERNFULLS : ATTR_KERNORMALS;

	error = attr_generic_list(vp, data, size, xflags, &result);
	if (error < 0)
	return error;
	return result;
	}

	STATIC int
	xfs_vn_removexattr(
	struct dentry *dentry,
	const char *name)
	{
	bhv_vnode_t *vp = vn_from_inode(dentry->d_inode);
	char attr = (char )name;
	attrnames_t *namesp;
	int xflags = 0;
	int error;

	namesp = attr_lookup_namespace(attr, attr_namespaces, ATTR_NAMECOUNT);
	if (!namesp)
	return -EOPNOTSUPP;
	attr += namesp->attr_namelen;
	error = namesp->attr_capable(vp, NULL);
	if (error)
	return error;
	xflags \|= namesp->attr_flag;
	return namesp->attr_remove(vp, attr, xflags);
	}


	const struct inode_operations xfs_inode_operations = {
	.permission = xfs_vn_permission,
	.truncate = xfs_vn_truncate,
	.getattr = xfs_vn_getattr,
	.setattr = xfs_vn_setattr,
	.setxattr = xfs_vn_setxattr,
	.getxattr = xfs_vn_getxattr,
	.listxattr = xfs_vn_listxattr,
	.removexattr = xfs_vn_removexattr,
	};

	const struct inode_operations xfs_dir_inode_operations = {
	.create = xfs_vn_create,
	.lookup = xfs_vn_lookup,
	.link = xfs_vn_link,
	.unlink = xfs_vn_unlink,
	.symlink = xfs_vn_symlink,
	.mkdir = xfs_vn_mkdir,
	.rmdir = xfs_vn_rmdir,
	.mknod = xfs_vn_mknod,
	.rename = xfs_vn_rename,
	.permission = xfs_vn_permission,
	.getattr = xfs_vn_getattr,
	.setattr = xfs_vn_setattr,
	.setxattr = xfs_vn_setxattr,
	.getxattr = xfs_vn_getxattr,
	.listxattr = xfs_vn_listxattr,
	.removexattr = xfs_vn_removexattr,
	};

	const struct inode_operations xfs_symlink_inode_operations = {
	.readlink = generic_readlink,
	.follow_link = xfs_vn_follow_link,
	.put_link = xfs_vn_put_link,
	.permission = xfs_vn_permission,
	.getattr = xfs_vn_getattr,
	.setattr = xfs_vn_setattr,
	.setxattr = xfs_vn_setxattr,
	.getxattr = xfs_vn_getxattr,
	.listxattr = xfs_vn_listxattr,
	.removexattr = xfs_vn_removexattr,
	};