Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2198 insertions, 0 deletions

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
new file mode 100644
index 000000000..23e6962cd
--- /dev/null
+++ b/fs/gfs2/inode.c
@@ -0,0 +1,2198 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
+ * Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
+ */
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/completion.h>
+#include <linux/buffer_head.h>
+#include <linux/namei.h>
+#include <linux/mm.h>
+#include <linux/cred.h>
+#include <linux/xattr.h>
+#include <linux/posix_acl.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/crc32.h>
+#include <linux/iomap.h>
+#include <linux/security.h>
+#include <linux/fiemap.h>
+#include <linux/uaccess.h>
+
+#include "gfs2.h"
+#include "incore.h"
+#include "acl.h"
+#include "bmap.h"
+#include "dir.h"
+#include "xattr.h"
+#include "glock.h"
+#include "inode.h"
+#include "meta_io.h"
+#include "quota.h"
+#include "rgrp.h"
+#include "trans.h"
+#include "util.h"
+#include "super.h"
+#include "glops.h"
+
+static const struct inode_operations gfs2_file_iops;
+static const struct inode_operations gfs2_dir_iops;
+static const struct inode_operations gfs2_symlink_iops;
+
+/**
+ * gfs2_set_iop - Sets inode operations
+ * @inode: The inode with correct i_mode filled in
+ *
+ * GFS2 lookup code fills in vfs inode contents based on info obtained
+ * from directory entry inside gfs2_inode_lookup().
+ */
+
+static void gfs2_set_iop(struct inode *inode)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	umode_t mode = inode->i_mode;
+
+	if (S_ISREG(mode)) {
+		inode->i_op = &gfs2_file_iops;
+		if (gfs2_localflocks(sdp))
+			inode->i_fop = &gfs2_file_fops_nolock;
+		else
+			inode->i_fop = &gfs2_file_fops;
+	} else if (S_ISDIR(mode)) {
+		inode->i_op = &gfs2_dir_iops;
+		if (gfs2_localflocks(sdp))
+			inode->i_fop = &gfs2_dir_fops_nolock;
+		else
+			inode->i_fop = &gfs2_dir_fops;
+	} else if (S_ISLNK(mode)) {
+		inode->i_op = &gfs2_symlink_iops;
+	} else {
+		inode->i_op = &gfs2_file_iops;
+		init_special_inode(inode, inode->i_mode, inode->i_rdev);
+	}
+}
+
+static int iget_test(struct inode *inode, void *opaque)
+{
+	u64 no_addr = *(u64 *)opaque;
+
+	return GFS2_I(inode)->i_no_addr == no_addr;
+}
+
+static int iget_set(struct inode *inode, void *opaque)
+{
+	u64 no_addr = *(u64 *)opaque;
+
+	GFS2_I(inode)->i_no_addr = no_addr;
+	inode->i_ino = no_addr;
+	return 0;
+}
+
+/**
+ * gfs2_inode_lookup - Lookup an inode
+ * @sb: The super block
+ * @type: The type of the inode
+ * @no_addr: The inode number
+ * @no_formal_ino: The inode generation number
+ * @blktype: Requested block type (GFS2_BLKST_DINODE or GFS2_BLKST_UNLINKED;
+ *           GFS2_BLKST_FREE to indicate not to verify)
+ *
+ * If @type is DT_UNKNOWN, the inode type is fetched from disk.
+ *
+ * If @blktype is anything other than GFS2_BLKST_FREE (which is used as a
+ * placeholder because it doesn't otherwise make sense), the on-disk block type
+ * is verified to be @blktype.
+ *
+ * When @no_formal_ino is non-zero, this function will return ERR_PTR(-ESTALE)
+ * if it detects that @no_formal_ino doesn't match the actual inode generation
+ * number.  However, it doesn't always know unless @type is DT_UNKNOWN.
+ *
+ * Returns: A VFS inode, or an error
+ */
+
+struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
+				u64 no_addr, u64 no_formal_ino,
+				unsigned int blktype)
+{
+	struct inode *inode;
+	struct gfs2_inode *ip;
+	struct gfs2_holder i_gh;
+	int error;
+
+	gfs2_holder_mark_uninitialized(&i_gh);
+	inode = iget5_locked(sb, no_addr, iget_test, iget_set, &no_addr);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	ip = GFS2_I(inode);
+
+	if (inode->i_state & I_NEW) {
+		struct gfs2_sbd *sdp = GFS2_SB(inode);
+		struct gfs2_glock *io_gl;
+		int extra_flags = 0;
+
+		error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE,
+				       &ip->i_gl);
+		if (unlikely(error))
+			goto fail;
+
+		error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE,
+				       &io_gl);
+		if (unlikely(error))
+			goto fail;
+
+		if (blktype == GFS2_BLKST_UNLINKED)
+			extra_flags |= LM_FLAG_TRY;
+		else
+			gfs2_cancel_delete_work(io_gl);
+		error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED,
+					   GL_EXACT | GL_NOPID | extra_flags,
+					   &ip->i_iopen_gh);
+		gfs2_glock_put(io_gl);
+		if (unlikely(error))
+			goto fail;
+
+		if (type == DT_UNKNOWN || blktype != GFS2_BLKST_FREE) {
+			/*
+			 * The GL_SKIP flag indicates to skip reading the inode
+			 * block.  We read the inode when instantiating it
+			 * after possibly checking the block type.
+			 */
+			error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE,
+						   GL_SKIP, &i_gh);
+			if (error)
+				goto fail;
+
+			error = -ESTALE;
+			if (no_formal_ino &&
+			    gfs2_inode_already_deleted(ip->i_gl, no_formal_ino))
+				goto fail;
+
+			if (blktype != GFS2_BLKST_FREE) {
+				error = gfs2_check_blk_type(sdp, no_addr,
+							    blktype);
+				if (error)
+					goto fail;
+			}
+		}
+
+		set_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags);
+
+		/* Lowest possible timestamp; will be overwritten in gfs2_dinode_in. */
+		inode->i_atime.tv_sec = 1LL << (8 * sizeof(inode->i_atime.tv_sec) - 1);
+		inode->i_atime.tv_nsec = 0;
+
+		glock_set_object(ip->i_gl, ip);
+
+		if (type == DT_UNKNOWN) {
+			/* Inode glock must be locked already */
+			error = gfs2_instantiate(&i_gh);
+			if (error) {
+				glock_clear_object(ip->i_gl, ip);
+				goto fail;
+			}
+		} else {
+			ip->i_no_formal_ino = no_formal_ino;
+			inode->i_mode = DT2IF(type);
+		}
+
+		if (gfs2_holder_initialized(&i_gh))
+			gfs2_glock_dq_uninit(&i_gh);
+		glock_set_object(ip->i_iopen_gh.gh_gl, ip);
+
+		gfs2_set_iop(inode);
+		unlock_new_inode(inode);
+	}
+
+	if (no_formal_ino && ip->i_no_formal_ino &&
+	    no_formal_ino != ip->i_no_formal_ino) {
+		iput(inode);
+		return ERR_PTR(-ESTALE);
+	}
+
+	return inode;
+
+fail:
+	if (error == GLR_TRYFAILED)
+		error = -EAGAIN;
+	if (gfs2_holder_initialized(&ip->i_iopen_gh))
+		gfs2_glock_dq_uninit(&ip->i_iopen_gh);
+	if (gfs2_holder_initialized(&i_gh))
+		gfs2_glock_dq_uninit(&i_gh);
+	iget_failed(inode);
+	return ERR_PTR(error);
+}
+
+/**
+ * gfs2_lookup_by_inum - look up an inode by inode number
+ * @sdp: The super block
+ * @no_addr: The inode number
+ * @no_formal_ino: The inode generation number (0 for any)
+ * @blktype: Requested block type (see gfs2_inode_lookup)
+ */
+struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
+				  u64 no_formal_ino, unsigned int blktype)
+{
+	struct super_block *sb = sdp->sd_vfs;
+	struct inode *inode;
+	int error;
+
+	inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, no_formal_ino,
+				  blktype);
+	if (IS_ERR(inode))
+		return inode;
+
+	if (no_formal_ino) {
+		error = -EIO;
+		if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
+			goto fail_iput;
+	}
+	return inode;
+
+fail_iput:
+	iput(inode);
+	return ERR_PTR(error);
+}
+
+
+struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
+{
+	struct qstr qstr;
+	struct inode *inode;
+	gfs2_str2qstr(&qstr, name);
+	inode = gfs2_lookupi(dip, &qstr, 1);
+	/* gfs2_lookupi has inconsistent callers: vfs
+	 * related routines expect NULL for no entry found,
+	 * gfs2_lookup_simple callers expect ENOENT
+	 * and do not check for NULL.
+	 */
+	if (inode == NULL)
+		return ERR_PTR(-ENOENT);
+	else
+		return inode;
+}
+
+
+/**
+ * gfs2_lookupi - Look up a filename in a directory and return its inode
+ * @dir: The inode of the directory containing the inode to look-up
+ * @name: The name of the inode to look for
+ * @is_root: If 1, ignore the caller's permissions
+ *
+ * This can be called via the VFS filldir function when NFS is doing
+ * a readdirplus and the inode which its intending to stat isn't
+ * already in cache. In this case we must not take the directory glock
+ * again, since the readdir call will have already taken that lock.
+ *
+ * Returns: errno
+ */
+
+struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
+			   int is_root)
+{
+	struct super_block *sb = dir->i_sb;
+	struct gfs2_inode *dip = GFS2_I(dir);
+	struct gfs2_holder d_gh;
+	int error = 0;
+	struct inode *inode = NULL;
+
+	gfs2_holder_mark_uninitialized(&d_gh);
+	if (!name->len || name->len > GFS2_FNAMESIZE)
+		return ERR_PTR(-ENAMETOOLONG);
+
+	if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
+	    (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
+	     dir == d_inode(sb->s_root))) {
+		igrab(dir);
+		return dir;
+	}
+
+	if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
+		error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
+		if (error)
+			return ERR_PTR(error);
+	}
+
+	if (!is_root) {
+		error = gfs2_permission(&init_user_ns, dir, MAY_EXEC);
+		if (error)
+			goto out;
+	}
+
+	inode = gfs2_dir_search(dir, name, false);
+	if (IS_ERR(inode))
+		error = PTR_ERR(inode);
+out:
+	if (gfs2_holder_initialized(&d_gh))
+		gfs2_glock_dq_uninit(&d_gh);
+	if (error == -ENOENT)
+		return NULL;
+	return inode ? inode : ERR_PTR(error);
+}
+
+/**
+ * create_ok - OK to create a new on-disk inode here?
+ * @dip:  Directory in which dinode is to be created
+ * @name:  Name of new dinode
+ * @mode:
+ *
+ * Returns: errno
+ */
+
+static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
+		     umode_t mode)
+{
+	int error;
+
+	error = gfs2_permission(&init_user_ns, &dip->i_inode,
+				MAY_WRITE | MAY_EXEC);
+	if (error)
+		return error;
+
+	/*  Don't create entries in an unlinked directory  */
+	if (!dip->i_inode.i_nlink)
+		return -ENOENT;
+
+	if (dip->i_entries == (u32)-1)
+		return -EFBIG;
+	if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
+		return -EMLINK;
+
+	return 0;
+}
+
+static void munge_mode_uid_gid(const struct gfs2_inode *dip,
+			       struct inode *inode)
+{
+	if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
+	    (dip->i_inode.i_mode & S_ISUID) &&
+	    !uid_eq(dip->i_inode.i_uid, GLOBAL_ROOT_UID)) {
+		if (S_ISDIR(inode->i_mode))
+			inode->i_mode |= S_ISUID;
+		else if (!uid_eq(dip->i_inode.i_uid, current_fsuid()))
+			inode->i_mode &= ~07111;
+		inode->i_uid = dip->i_inode.i_uid;
+	} else
+		inode->i_uid = current_fsuid();
+
+	if (dip->i_inode.i_mode & S_ISGID) {
+		if (S_ISDIR(inode->i_mode))
+			inode->i_mode |= S_ISGID;
+		inode->i_gid = dip->i_inode.i_gid;
+	} else
+		inode->i_gid = current_fsgid();
+}
+
+static int alloc_dinode(struct gfs2_inode *ip, u32 flags, unsigned *dblocks)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	struct gfs2_alloc_parms ap = { .target = *dblocks, .aflags = flags, };
+	int error;
+
+	error = gfs2_quota_lock_check(ip, &ap);
+	if (error)
+		goto out;
+
+	error = gfs2_inplace_reserve(ip, &ap);
+	if (error)
+		goto out_quota;
+
+	error = gfs2_trans_begin(sdp, (*dblocks * RES_RG_BIT) + RES_STATFS + RES_QUOTA, 0);
+	if (error)
+		goto out_ipreserv;
+
+	error = gfs2_alloc_blocks(ip, &ip->i_no_addr, dblocks, 1, &ip->i_generation);
+	ip->i_no_formal_ino = ip->i_generation;
+	ip->i_inode.i_ino = ip->i_no_addr;
+	ip->i_goal = ip->i_no_addr;
+
+	gfs2_trans_end(sdp);
+
+out_ipreserv:
+	gfs2_inplace_release(ip);
+out_quota:
+	gfs2_quota_unlock(ip);
+out:
+	return error;
+}
+
+static void gfs2_init_dir(struct buffer_head *dibh,
+			  const struct gfs2_inode *parent)
+{
+	struct gfs2_dinode *di = (struct gfs2_dinode *)dibh->b_data;
+	struct gfs2_dirent *dent = (struct gfs2_dirent *)(di+1);
+
+	gfs2_qstr2dirent(&gfs2_qdot, GFS2_DIRENT_SIZE(gfs2_qdot.len), dent);
+	dent->de_inum = di->di_num; /* already GFS2 endian */
+	dent->de_type = cpu_to_be16(DT_DIR);
+
+	dent = (struct gfs2_dirent *)((char*)dent + GFS2_DIRENT_SIZE(1));
+	gfs2_qstr2dirent(&gfs2_qdotdot, dibh->b_size - GFS2_DIRENT_SIZE(1) - sizeof(struct gfs2_dinode), dent);
+	gfs2_inum_out(parent, dent);
+	dent->de_type = cpu_to_be16(DT_DIR);
+	
+}
+
+/**
+ * gfs2_init_xattr - Initialise an xattr block for a new inode
+ * @ip: The inode in question
+ *
+ * This sets up an empty xattr block for a new inode, ready to
+ * take any ACLs, LSM xattrs, etc.
+ */
+
+static void gfs2_init_xattr(struct gfs2_inode *ip)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
+	struct buffer_head *bh;
+	struct gfs2_ea_header *ea;
+
+	bh = gfs2_meta_new(ip->i_gl, ip->i_eattr);
+	gfs2_trans_add_meta(ip->i_gl, bh);
+	gfs2_metatype_set(bh, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
+	gfs2_buffer_clear_tail(bh, sizeof(struct gfs2_meta_header));
+
+	ea = GFS2_EA_BH2FIRST(bh);
+	ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
+	ea->ea_type = GFS2_EATYPE_UNUSED;
+	ea->ea_flags = GFS2_EAFLAG_LAST;
+
+	brelse(bh);
+}
+
+/**
+ * init_dinode - Fill in a new dinode structure
+ * @dip: The directory this inode is being created in
+ * @ip: The inode
+ * @symname: The symlink destination (if a symlink)
+ *
+ */
+
+static void init_dinode(struct gfs2_inode *dip, struct gfs2_inode *ip,
+			const char *symname)
+{
+	struct gfs2_dinode *di;
+	struct buffer_head *dibh;
+
+	dibh = gfs2_meta_new(ip->i_gl, ip->i_no_addr);
+	gfs2_trans_add_meta(ip->i_gl, dibh);
+	di = (struct gfs2_dinode *)dibh->b_data;
+	gfs2_dinode_out(ip, di);
+
+	di->di_major = cpu_to_be32(imajor(&ip->i_inode));
+	di->di_minor = cpu_to_be32(iminor(&ip->i_inode));
+	di->__pad1 = 0;
+	di->__pad2 = 0;
+	di->__pad3 = 0;
+	memset(&di->__pad4, 0, sizeof(di->__pad4));
+	memset(&di->di_reserved, 0, sizeof(di->di_reserved));
+	gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
+
+	switch(ip->i_inode.i_mode & S_IFMT) {
+	case S_IFDIR:
+		gfs2_init_dir(dibh, dip);
+		break;
+	case S_IFLNK:
+		memcpy(dibh->b_data + sizeof(struct gfs2_dinode), symname, ip->i_inode.i_size);
+		break;
+	}
+
+	set_buffer_uptodate(dibh);
+	brelse(dibh);
+}
+
+/**
+ * gfs2_trans_da_blks - Calculate number of blocks to link inode
+ * @dip: The directory we are linking into
+ * @da: The dir add information
+ * @nr_inodes: The number of inodes involved
+ *
+ * This calculate the number of blocks we need to reserve in a
+ * transaction to link @nr_inodes into a directory. In most cases
+ * @nr_inodes will be 2 (the directory plus the inode being linked in)
+ * but in case of rename, 4 may be required.
+ *
+ * Returns: Number of blocks
+ */
+
+static unsigned gfs2_trans_da_blks(const struct gfs2_inode *dip,
+				   const struct gfs2_diradd *da,
+				   unsigned nr_inodes)
+{
+	return da->nr_blocks + gfs2_rg_blocks(dip, da->nr_blocks) +
+	       (nr_inodes * RES_DINODE) + RES_QUOTA + RES_STATFS;
+}
+
+static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
+		       struct gfs2_inode *ip, struct gfs2_diradd *da)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
+	struct gfs2_alloc_parms ap = { .target = da->nr_blocks, };
+	int error;
+
+	if (da->nr_blocks) {
+		error = gfs2_quota_lock_check(dip, &ap);
+		if (error)
+			goto fail_quota_locks;
+
+		error = gfs2_inplace_reserve(dip, &ap);
+		if (error)
+			goto fail_quota_locks;
+
+		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, da, 2), 0);
+		if (error)
+			goto fail_ipreserv;
+	} else {
+		error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
+		if (error)
+			goto fail_quota_locks;
+	}
+
+	error = gfs2_dir_add(&dip->i_inode, name, ip, da);
+
+	gfs2_trans_end(sdp);
+fail_ipreserv:
+	gfs2_inplace_release(dip);
+fail_quota_locks:
+	gfs2_quota_unlock(dip);
+	return error;
+}
+
+static int gfs2_initxattrs(struct inode *inode, const struct xattr *xattr_array,
+		    void *fs_info)
+{
+	const struct xattr *xattr;
+	int err = 0;
+
+	for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+		err = __gfs2_xattr_set(inode, xattr->name, xattr->value,
+				       xattr->value_len, 0,
+				       GFS2_EATYPE_SECURITY);
+		if (err < 0)
+			break;
+	}
+	return err;
+}
+
+/**
+ * gfs2_create_inode - Create a new inode
+ * @dir: The parent directory
+ * @dentry: The new dentry
+ * @file: If non-NULL, the file which is being opened
+ * @mode: The permissions on the new inode
+ * @dev: For device nodes, this is the device number
+ * @symname: For symlinks, this is the link destination
+ * @size: The initial size of the inode (ignored for directories)
+ * @excl: Force fail if inode exists
+ *
+ * Returns: 0 on success, or error code
+ */
+
+static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
+			     struct file *file,
+			     umode_t mode, dev_t dev, const char *symname,
+			     unsigned int size, int excl)
+{
+	const struct qstr *name = &dentry->d_name;
+	struct posix_acl *default_acl, *acl;
+	struct gfs2_holder ghs[2];
+	struct inode *inode = NULL;
+	struct gfs2_inode *dip = GFS2_I(dir), *ip;
+	struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
+	struct gfs2_glock *io_gl;
+	int error, free_vfs_inode = 1;
+	u32 aflags = 0;
+	unsigned blocks = 1;
+	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
+
+	if (!name->len || name->len > GFS2_FNAMESIZE)
+		return -ENAMETOOLONG;
+
+	error = gfs2_qa_get(dip);
+	if (error)
+		return error;
+
+	error = gfs2_rindex_update(sdp);
+	if (error)
+		goto fail;
+
+	error = gfs2_glock_nq_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
+	if (error)
+		goto fail;
+	gfs2_holder_mark_uninitialized(ghs + 1);
+
+	error = create_ok(dip, name, mode);
+	if (error)
+		goto fail_gunlock;
+
+	inode = gfs2_dir_search(dir, &dentry->d_name, !S_ISREG(mode) || excl);
+	error = PTR_ERR(inode);
+	if (!IS_ERR(inode)) {
+		if (S_ISDIR(inode->i_mode)) {
+			iput(inode);
+			inode = ERR_PTR(-EISDIR);
+			goto fail_gunlock;
+		}
+		d_instantiate(dentry, inode);
+		error = 0;
+		if (file) {
+			if (S_ISREG(inode->i_mode))
+				error = finish_open(file, dentry, gfs2_open_common);
+			else
+				error = finish_no_open(file, NULL);
+		}
+		gfs2_glock_dq_uninit(ghs);
+		goto fail;
+	} else if (error != -ENOENT) {
+		goto fail_gunlock;
+	}
+
+	error = gfs2_diradd_alloc_required(dir, name, &da);
+	if (error < 0)
+		goto fail_gunlock;
+
+	inode = new_inode(sdp->sd_vfs);
+	error = -ENOMEM;
+	if (!inode)
+		goto fail_gunlock;
+
+	error = posix_acl_create(dir, &mode, &default_acl, &acl);
+	if (error)
+		goto fail_gunlock;
+
+	ip = GFS2_I(inode);
+	error = gfs2_qa_get(ip);
+	if (error)
+		goto fail_free_acls;
+
+	inode->i_mode = mode;
+	set_nlink(inode, S_ISDIR(mode) ? 2 : 1);
+	inode->i_rdev = dev;
+	inode->i_size = size;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
+	munge_mode_uid_gid(dip, inode);
+	check_and_update_goal(dip);
+	ip->i_goal = dip->i_goal;
+	ip->i_diskflags = 0;
+	ip->i_eattr = 0;
+	ip->i_height = 0;
+	ip->i_depth = 0;
+	ip->i_entries = 0;
+	ip->i_no_addr = 0; /* Temporarily zero until real addr is assigned */
+
+	switch(mode & S_IFMT) {
+	case S_IFREG:
+		if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
+		    gfs2_tune_get(sdp, gt_new_files_jdata))
+			ip->i_diskflags |= GFS2_DIF_JDATA;
+		gfs2_set_aops(inode);
+		break;
+	case S_IFDIR:
+		ip->i_diskflags |= (dip->i_diskflags & GFS2_DIF_INHERIT_JDATA);
+		ip->i_diskflags |= GFS2_DIF_JDATA;
+		ip->i_entries = 2;
+		break;
+	}
+
+	/* Force SYSTEM flag on all files and subdirs of a SYSTEM directory */
+	if (dip->i_diskflags & GFS2_DIF_SYSTEM)
+		ip->i_diskflags |= GFS2_DIF_SYSTEM;
+
+	gfs2_set_inode_flags(inode);
+
+	if ((GFS2_I(d_inode(sdp->sd_root_dir)) == dip) ||
+	    (dip->i_diskflags & GFS2_DIF_TOPDIR))
+		aflags |= GFS2_AF_ORLOV;
+
+	if (default_acl || acl)
+		blocks++;
+
+	error = alloc_dinode(ip, aflags, &blocks);
+	if (error)
+		goto fail_free_inode;
+
+	gfs2_set_inode_blocks(inode, blocks);
+
+	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
+	if (error)
+		goto fail_free_inode;
+
+	error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
+	if (error)
+		goto fail_free_inode;
+	gfs2_cancel_delete_work(io_gl);
+
+	error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr);
+	BUG_ON(error);
+
+	error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT | GL_NOPID,
+				   &ip->i_iopen_gh);
+	if (error)
+		goto fail_gunlock2;
+
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
+	if (error)
+		goto fail_gunlock3;
+
+	error = gfs2_trans_begin(sdp, blocks, 0);
+	if (error)
+		goto fail_gunlock3;
+
+	if (blocks > 1) {
+		ip->i_eattr = ip->i_no_addr + 1;
+		gfs2_init_xattr(ip);
+	}
+	init_dinode(dip, ip, symname);
+	gfs2_trans_end(sdp);
+
+	glock_set_object(ip->i_gl, ip);
+	glock_set_object(io_gl, ip);
+	gfs2_set_iop(inode);
+
+	free_vfs_inode = 0; /* After this point, the inode is no longer
+			       considered free. Any failures need to undo
+			       the gfs2 structures. */
+	if (default_acl) {
+		error = __gfs2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
+		if (error)
+			goto fail_gunlock4;
+		posix_acl_release(default_acl);
+		default_acl = NULL;
+	}
+	if (acl) {
+		error = __gfs2_set_acl(inode, acl, ACL_TYPE_ACCESS);
+		if (error)
+			goto fail_gunlock4;
+		posix_acl_release(acl);
+		acl = NULL;
+	}
+
+	error = security_inode_init_security(&ip->i_inode, &dip->i_inode, name,
+					     &gfs2_initxattrs, NULL);
+	if (error)
+		goto fail_gunlock4;
+
+	error = link_dinode(dip, name, ip, &da);
+	if (error)
+		goto fail_gunlock4;
+
+	mark_inode_dirty(inode);
+	d_instantiate(dentry, inode);
+	/* After instantiate, errors should result in evict which will destroy
+	 * both inode and iopen glocks properly. */
+	if (file) {
+		file->f_mode |= FMODE_CREATED;
+		error = finish_open(file, dentry, gfs2_open_common);
+	}
+	gfs2_glock_dq_uninit(ghs);
+	gfs2_qa_put(ip);
+	gfs2_glock_dq_uninit(ghs + 1);
+	gfs2_glock_put(io_gl);
+	gfs2_qa_put(dip);
+	unlock_new_inode(inode);
+	return error;
+
+fail_gunlock4:
+	glock_clear_object(ip->i_gl, ip);
+	glock_clear_object(io_gl, ip);
+fail_gunlock3:
+	gfs2_glock_dq_uninit(&ip->i_iopen_gh);
+fail_gunlock2:
+	gfs2_glock_put(io_gl);
+fail_free_inode:
+	if (ip->i_gl) {
+		if (free_vfs_inode) /* else evict will do the put for us */
+			gfs2_glock_put(ip->i_gl);
+	}
+	gfs2_rs_deltree(&ip->i_res);
+	gfs2_qa_put(ip);
+fail_free_acls:
+	posix_acl_release(default_acl);
+	posix_acl_release(acl);
+fail_gunlock:
+	gfs2_dir_no_add(&da);
+	gfs2_glock_dq_uninit(ghs);
+	if (!IS_ERR_OR_NULL(inode)) {
+		clear_nlink(inode);
+		if (!free_vfs_inode)
+			mark_inode_dirty(inode);
+		set_bit(free_vfs_inode ? GIF_FREE_VFS_INODE : GIF_ALLOC_FAILED,
+			&GFS2_I(inode)->i_flags);
+		if (inode->i_state & I_NEW)
+			iget_failed(inode);
+		else
+			iput(inode);
+	}
+	if (gfs2_holder_initialized(ghs + 1))
+		gfs2_glock_dq_uninit(ghs + 1);
+fail:
+	gfs2_qa_put(dip);
+	return error;
+}
+
+/**
+ * gfs2_create - Create a file
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @dir: The directory in which to create the file
+ * @dentry: The dentry of the new file
+ * @mode: The mode of the new file
+ * @excl: Force fail if inode exists
+ *
+ * Returns: errno
+ */
+
+static int gfs2_create(struct user_namespace *mnt_userns, struct inode *dir,
+		       struct dentry *dentry, umode_t mode, bool excl)
+{
+	return gfs2_create_inode(dir, dentry, NULL, S_IFREG | mode, 0, NULL, 0, excl);
+}
+
+/**
+ * __gfs2_lookup - Look up a filename in a directory and return its inode
+ * @dir: The directory inode
+ * @dentry: The dentry of the new inode
+ * @file: File to be opened
+ *
+ *
+ * Returns: errno
+ */
+
+static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
+				    struct file *file)
+{
+	struct inode *inode;
+	struct dentry *d;
+	struct gfs2_holder gh;
+	struct gfs2_glock *gl;
+	int error;
+
+	inode = gfs2_lookupi(dir, &dentry->d_name, 0);
+	if (inode == NULL) {
+		d_add(dentry, NULL);
+		return NULL;
+	}
+	if (IS_ERR(inode))
+		return ERR_CAST(inode);
+
+	gl = GFS2_I(inode)->i_gl;
+	error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
+	if (error) {
+		iput(inode);
+		return ERR_PTR(error);
+	}
+
+	d = d_splice_alias(inode, dentry);
+	if (IS_ERR(d)) {
+		gfs2_glock_dq_uninit(&gh);
+		return d;
+	}
+	if (file && S_ISREG(inode->i_mode))
+		error = finish_open(file, dentry, gfs2_open_common);
+
+	gfs2_glock_dq_uninit(&gh);
+	if (error) {
+		dput(d);
+		return ERR_PTR(error);
+	}
+	return d;
+}
+
+static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
+				  unsigned flags)
+{
+	return __gfs2_lookup(dir, dentry, NULL);
+}
+
+/**
+ * gfs2_link - Link to a file
+ * @old_dentry: The inode to link
+ * @dir: Add link to this directory
+ * @dentry: The name of the link
+ *
+ * Link the inode in "old_dentry" into the directory "dir" with the
+ * name in "dentry".
+ *
+ * Returns: errno
+ */
+
+static int gfs2_link(struct dentry *old_dentry, struct inode *dir,
+		     struct dentry *dentry)
+{
+	struct gfs2_inode *dip = GFS2_I(dir);
+	struct gfs2_sbd *sdp = GFS2_SB(dir);
+	struct inode *inode = d_inode(old_dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder ghs[2];
+	struct buffer_head *dibh;
+	struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
+	int error;
+
+	if (S_ISDIR(inode->i_mode))
+		return -EPERM;
+
+	error = gfs2_qa_get(dip);
+	if (error)
+		return error;
+
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, ghs + 1);
+
+	error = gfs2_glock_nq(ghs); /* parent */
+	if (error)
+		goto out_parent;
+
+	error = gfs2_glock_nq(ghs + 1); /* child */
+	if (error)
+		goto out_child;
+
+	error = -ENOENT;
+	if (inode->i_nlink == 0)
+		goto out_gunlock;
+
+	error = gfs2_permission(&init_user_ns, dir, MAY_WRITE | MAY_EXEC);
+	if (error)
+		goto out_gunlock;
+
+	error = gfs2_dir_check(dir, &dentry->d_name, NULL);
+	switch (error) {
+	case -ENOENT:
+		break;
+	case 0:
+		error = -EEXIST;
+		goto out_gunlock;
+	default:
+		goto out_gunlock;
+	}
+
+	error = -EINVAL;
+	if (!dip->i_inode.i_nlink)
+		goto out_gunlock;
+	error = -EFBIG;
+	if (dip->i_entries == (u32)-1)
+		goto out_gunlock;
+	error = -EPERM;
+	if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+		goto out_gunlock;
+	error = -EINVAL;
+	if (!ip->i_inode.i_nlink)
+		goto out_gunlock;
+	error = -EMLINK;
+	if (ip->i_inode.i_nlink == (u32)-1)
+		goto out_gunlock;
+
+	error = gfs2_diradd_alloc_required(dir, &dentry->d_name, &da);
+	if (error < 0)
+		goto out_gunlock;
+
+	if (da.nr_blocks) {
+		struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
+		error = gfs2_quota_lock_check(dip, &ap);
+		if (error)
+			goto out_gunlock;
+
+		error = gfs2_inplace_reserve(dip, &ap);
+		if (error)
+			goto out_gunlock_q;
+
+		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(dip, &da, 2), 0);
+		if (error)
+			goto out_ipres;
+	} else {
+		error = gfs2_trans_begin(sdp, 2 * RES_DINODE + RES_LEAF, 0);
+		if (error)
+			goto out_ipres;
+	}
+
+	error = gfs2_meta_inode_buffer(ip, &dibh);
+	if (error)
+		goto out_end_trans;
+
+	error = gfs2_dir_add(dir, &dentry->d_name, ip, &da);
+	if (error)
+		goto out_brelse;
+
+	gfs2_trans_add_meta(ip->i_gl, dibh);
+	inc_nlink(&ip->i_inode);
+	ip->i_inode.i_ctime = current_time(&ip->i_inode);
+	ihold(inode);
+	d_instantiate(dentry, inode);
+	mark_inode_dirty(inode);
+
+out_brelse:
+	brelse(dibh);
+out_end_trans:
+	gfs2_trans_end(sdp);
+out_ipres:
+	if (da.nr_blocks)
+		gfs2_inplace_release(dip);
+out_gunlock_q:
+	if (da.nr_blocks)
+		gfs2_quota_unlock(dip);
+out_gunlock:
+	gfs2_dir_no_add(&da);
+	gfs2_glock_dq(ghs + 1);
+out_child:
+	gfs2_glock_dq(ghs);
+out_parent:
+	gfs2_qa_put(dip);
+	gfs2_holder_uninit(ghs);
+	gfs2_holder_uninit(ghs + 1);
+	return error;
+}
+
+/*
+ * gfs2_unlink_ok - check to see that a inode is still in a directory
+ * @dip: the directory
+ * @name: the name of the file
+ * @ip: the inode
+ *
+ * Assumes that the lock on (at least) @dip is held.
+ *
+ * Returns: 0 if the parent/child relationship is correct, errno if it isn't
+ */
+
+static int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
+			  const struct gfs2_inode *ip)
+{
+	int error;
+
+	if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
+		return -EPERM;
+
+	if ((dip->i_inode.i_mode & S_ISVTX) &&
+	    !uid_eq(dip->i_inode.i_uid, current_fsuid()) &&
+	    !uid_eq(ip->i_inode.i_uid, current_fsuid()) && !capable(CAP_FOWNER))
+		return -EPERM;
+
+	if (IS_APPEND(&dip->i_inode))
+		return -EPERM;
+
+	error = gfs2_permission(&init_user_ns, &dip->i_inode,
+				MAY_WRITE | MAY_EXEC);
+	if (error)
+		return error;
+
+	return gfs2_dir_check(&dip->i_inode, name, ip);
+}
+
+/**
+ * gfs2_unlink_inode - Removes an inode from its parent dir and unlinks it
+ * @dip: The parent directory
+ * @dentry: The dentry to unlink
+ *
+ * Called with all the locks and in a transaction. This will only be
+ * called for a directory after it has been checked to ensure it is empty.
+ *
+ * Returns: 0 on success, or an error
+ */
+
+static int gfs2_unlink_inode(struct gfs2_inode *dip,
+			     const struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	int error;
+
+	error = gfs2_dir_del(dip, dentry);
+	if (error)
+		return error;
+
+	ip->i_entries = 0;
+	inode->i_ctime = current_time(inode);
+	if (S_ISDIR(inode->i_mode))
+		clear_nlink(inode);
+	else
+		drop_nlink(inode);
+	mark_inode_dirty(inode);
+	if (inode->i_nlink == 0)
+		gfs2_unlink_di(inode);
+	return 0;
+}
+
+
+/**
+ * gfs2_unlink - Unlink an inode (this does rmdir as well)
+ * @dir: The inode of the directory containing the inode to unlink
+ * @dentry: The file itself
+ *
+ * This routine uses the type of the inode as a flag to figure out
+ * whether this is an unlink or an rmdir.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_unlink(struct inode *dir, struct dentry *dentry)
+{
+	struct gfs2_inode *dip = GFS2_I(dir);
+	struct gfs2_sbd *sdp = GFS2_SB(dir);
+	struct inode *inode = d_inode(dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder ghs[3];
+	struct gfs2_rgrpd *rgd;
+	int error;
+
+	error = gfs2_rindex_update(sdp);
+	if (error)
+		return error;
+
+	error = -EROFS;
+
+	gfs2_holder_init(dip->i_gl, LM_ST_EXCLUSIVE, 0, ghs);
+	gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, ghs + 1);
+
+	rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
+	if (!rgd)
+		goto out_inodes;
+
+	gfs2_holder_init(rgd->rd_gl, LM_ST_EXCLUSIVE, LM_FLAG_NODE_SCOPE, ghs + 2);
+
+
+	error = gfs2_glock_nq(ghs); /* parent */
+	if (error)
+		goto out_parent;
+
+	error = gfs2_glock_nq(ghs + 1); /* child */
+	if (error)
+		goto out_child;
+
+	error = -ENOENT;
+	if (inode->i_nlink == 0)
+		goto out_rgrp;
+
+	if (S_ISDIR(inode->i_mode)) {
+		error = -ENOTEMPTY;
+		if (ip->i_entries > 2 || inode->i_nlink > 2)
+			goto out_rgrp;
+	}
+
+	error = gfs2_glock_nq(ghs + 2); /* rgrp */
+	if (error)
+		goto out_rgrp;
+
+	error = gfs2_unlink_ok(dip, &dentry->d_name, ip);
+	if (error)
+		goto out_gunlock;
+
+	error = gfs2_trans_begin(sdp, 2*RES_DINODE + 3*RES_LEAF + RES_RG_BIT, 0);
+	if (error)
+		goto out_gunlock;
+
+	error = gfs2_unlink_inode(dip, dentry);
+	gfs2_trans_end(sdp);
+
+out_gunlock:
+	gfs2_glock_dq(ghs + 2);
+out_rgrp:
+	gfs2_glock_dq(ghs + 1);
+out_child:
+	gfs2_glock_dq(ghs);
+out_parent:
+	gfs2_holder_uninit(ghs + 2);
+out_inodes:
+	gfs2_holder_uninit(ghs + 1);
+	gfs2_holder_uninit(ghs);
+	return error;
+}
+
+/**
+ * gfs2_symlink - Create a symlink
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @dir: The directory to create the symlink in
+ * @dentry: The dentry to put the symlink in
+ * @symname: The thing which the link points to
+ *
+ * Returns: errno
+ */
+
+static int gfs2_symlink(struct user_namespace *mnt_userns, struct inode *dir,
+			struct dentry *dentry, const char *symname)
+{
+	unsigned int size;
+
+	size = strlen(symname);
+	if (size >= gfs2_max_stuffed_size(GFS2_I(dir)))
+		return -ENAMETOOLONG;
+
+	return gfs2_create_inode(dir, dentry, NULL, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
+}
+
+/**
+ * gfs2_mkdir - Make a directory
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @dir: The parent directory of the new one
+ * @dentry: The dentry of the new directory
+ * @mode: The mode of the new directory
+ *
+ * Returns: errno
+ */
+
+static int gfs2_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
+		      struct dentry *dentry, umode_t mode)
+{
+	unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));
+	return gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0);
+}
+
+/**
+ * gfs2_mknod - Make a special file
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @dir: The directory in which the special file will reside
+ * @dentry: The dentry of the special file
+ * @mode: The mode of the special file
+ * @dev: The device specification of the special file
+ *
+ */
+
+static int gfs2_mknod(struct user_namespace *mnt_userns, struct inode *dir,
+		      struct dentry *dentry, umode_t mode, dev_t dev)
+{
+	return gfs2_create_inode(dir, dentry, NULL, mode, dev, NULL, 0, 0);
+}
+
+/**
+ * gfs2_atomic_open - Atomically open a file
+ * @dir: The directory
+ * @dentry: The proposed new entry
+ * @file: The proposed new struct file
+ * @flags: open flags
+ * @mode: File mode
+ *
+ * Returns: error code or 0 for success
+ */
+
+static int gfs2_atomic_open(struct inode *dir, struct dentry *dentry,
+			    struct file *file, unsigned flags,
+			    umode_t mode)
+{
+	struct dentry *d;
+	bool excl = !!(flags & O_EXCL);
+
+	if (!d_in_lookup(dentry))
+		goto skip_lookup;
+
+	d = __gfs2_lookup(dir, dentry, file);
+	if (IS_ERR(d))
+		return PTR_ERR(d);
+	if (d != NULL)
+		dentry = d;
+	if (d_really_is_positive(dentry)) {
+		if (!(file->f_mode & FMODE_OPENED))
+			return finish_no_open(file, d);
+		dput(d);
+		return excl && (flags & O_CREAT) ? -EEXIST : 0;
+	}
+
+	BUG_ON(d != NULL);
+
+skip_lookup:
+	if (!(flags & O_CREAT))
+		return -ENOENT;
+
+	return gfs2_create_inode(dir, dentry, file, S_IFREG | mode, 0, NULL, 0, excl);
+}
+
+/*
+ * gfs2_ok_to_move - check if it's ok to move a directory to another directory
+ * @this: move this
+ * @to: to here
+ *
+ * Follow @to back to the root and make sure we don't encounter @this
+ * Assumes we already hold the rename lock.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
+{
+	struct inode *dir = &to->i_inode;
+	struct super_block *sb = dir->i_sb;
+	struct inode *tmp;
+	int error = 0;
+
+	igrab(dir);
+
+	for (;;) {
+		if (dir == &this->i_inode) {
+			error = -EINVAL;
+			break;
+		}
+		if (dir == d_inode(sb->s_root)) {
+			error = 0;
+			break;
+		}
+
+		tmp = gfs2_lookupi(dir, &gfs2_qdotdot, 1);
+		if (!tmp) {
+			error = -ENOENT;
+			break;
+		}
+		if (IS_ERR(tmp)) {
+			error = PTR_ERR(tmp);
+			break;
+		}
+
+		iput(dir);
+		dir = tmp;
+	}
+
+	iput(dir);
+
+	return error;
+}
+
+/**
+ * update_moved_ino - Update an inode that's being moved
+ * @ip: The inode being moved
+ * @ndip: The parent directory of the new filename
+ * @dir_rename: True of ip is a directory
+ *
+ * Returns: errno
+ */
+
+static int update_moved_ino(struct gfs2_inode *ip, struct gfs2_inode *ndip,
+			    int dir_rename)
+{
+	if (dir_rename)
+		return gfs2_dir_mvino(ip, &gfs2_qdotdot, ndip, DT_DIR);
+
+	ip->i_inode.i_ctime = current_time(&ip->i_inode);
+	mark_inode_dirty_sync(&ip->i_inode);
+	return 0;
+}
+
+
+/**
+ * gfs2_rename - Rename a file
+ * @odir: Parent directory of old file name
+ * @odentry: The old dentry of the file
+ * @ndir: Parent directory of new file name
+ * @ndentry: The new dentry of the file
+ *
+ * Returns: errno
+ */
+
+static int gfs2_rename(struct inode *odir, struct dentry *odentry,
+		       struct inode *ndir, struct dentry *ndentry)
+{
+	struct gfs2_inode *odip = GFS2_I(odir);
+	struct gfs2_inode *ndip = GFS2_I(ndir);
+	struct gfs2_inode *ip = GFS2_I(d_inode(odentry));
+	struct gfs2_inode *nip = NULL;
+	struct gfs2_sbd *sdp = GFS2_SB(odir);
+	struct gfs2_holder ghs[4], r_gh, rd_gh;
+	struct gfs2_rgrpd *nrgd;
+	unsigned int num_gh;
+	int dir_rename = 0;
+	struct gfs2_diradd da = { .nr_blocks = 0, .save_loc = 0, };
+	unsigned int x;
+	int error;
+
+	gfs2_holder_mark_uninitialized(&r_gh);
+	gfs2_holder_mark_uninitialized(&rd_gh);
+	if (d_really_is_positive(ndentry)) {
+		nip = GFS2_I(d_inode(ndentry));
+		if (ip == nip)
+			return 0;
+	}
+
+	error = gfs2_rindex_update(sdp);
+	if (error)
+		return error;
+
+	error = gfs2_qa_get(ndip);
+	if (error)
+		return error;
+
+	if (odip != ndip) {
+		error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
+					   0, &r_gh);
+		if (error)
+			goto out;
+
+		if (S_ISDIR(ip->i_inode.i_mode)) {
+			dir_rename = 1;
+			/* don't move a directory into its subdir */
+			error = gfs2_ok_to_move(ip, ndip);
+			if (error)
+				goto out_gunlock_r;
+		}
+	}
+
+	num_gh = 1;
+	gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
+	if (odip != ndip) {
+		gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE,GL_ASYNC,
+				 ghs + num_gh);
+		num_gh++;
+	}
+	gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
+	num_gh++;
+
+	if (nip) {
+		gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
+				 ghs + num_gh);
+		num_gh++;
+	}
+
+	for (x = 0; x < num_gh; x++) {
+		error = gfs2_glock_nq(ghs + x);
+		if (error)
+			goto out_gunlock;
+	}
+	error = gfs2_glock_async_wait(num_gh, ghs);
+	if (error)
+		goto out_gunlock;
+
+	if (nip) {
+		/* Grab the resource group glock for unlink flag twiddling.
+		 * This is the case where the target dinode already exists
+		 * so we unlink before doing the rename.
+		 */
+		nrgd = gfs2_blk2rgrpd(sdp, nip->i_no_addr, 1);
+		if (!nrgd) {
+			error = -ENOENT;
+			goto out_gunlock;
+		}
+		error = gfs2_glock_nq_init(nrgd->rd_gl, LM_ST_EXCLUSIVE,
+					   LM_FLAG_NODE_SCOPE, &rd_gh);
+		if (error)
+			goto out_gunlock;
+	}
+
+	error = -ENOENT;
+	if (ip->i_inode.i_nlink == 0)
+		goto out_gunlock;
+
+	/* Check out the old directory */
+
+	error = gfs2_unlink_ok(odip, &odentry->d_name, ip);
+	if (error)
+		goto out_gunlock;
+
+	/* Check out the new directory */
+
+	if (nip) {
+		error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
+		if (error)
+			goto out_gunlock;
+
+		if (nip->i_inode.i_nlink == 0) {
+			error = -EAGAIN;
+			goto out_gunlock;
+		}
+
+		if (S_ISDIR(nip->i_inode.i_mode)) {
+			if (nip->i_entries < 2) {
+				gfs2_consist_inode(nip);
+				error = -EIO;
+				goto out_gunlock;
+			}
+			if (nip->i_entries > 2) {
+				error = -ENOTEMPTY;
+				goto out_gunlock;
+			}
+		}
+	} else {
+		error = gfs2_permission(&init_user_ns, ndir,
+					MAY_WRITE | MAY_EXEC);
+		if (error)
+			goto out_gunlock;
+
+		error = gfs2_dir_check(ndir, &ndentry->d_name, NULL);
+		switch (error) {
+		case -ENOENT:
+			error = 0;
+			break;
+		case 0:
+			error = -EEXIST;
+			goto out_gunlock;
+		default:
+			goto out_gunlock;
+		}
+
+		if (odip != ndip) {
+			if (!ndip->i_inode.i_nlink) {
+				error = -ENOENT;
+				goto out_gunlock;
+			}
+			if (ndip->i_entries == (u32)-1) {
+				error = -EFBIG;
+				goto out_gunlock;
+			}
+			if (S_ISDIR(ip->i_inode.i_mode) &&
+			    ndip->i_inode.i_nlink == (u32)-1) {
+				error = -EMLINK;
+				goto out_gunlock;
+			}
+		}
+	}
+
+	/* Check out the dir to be renamed */
+
+	if (dir_rename) {
+		error = gfs2_permission(&init_user_ns, d_inode(odentry),
+					MAY_WRITE);
+		if (error)
+			goto out_gunlock;
+	}
+
+	if (nip == NULL) {
+		error = gfs2_diradd_alloc_required(ndir, &ndentry->d_name, &da);
+		if (error)
+			goto out_gunlock;
+	}
+
+	if (da.nr_blocks) {
+		struct gfs2_alloc_parms ap = { .target = da.nr_blocks, };
+		error = gfs2_quota_lock_check(ndip, &ap);
+		if (error)
+			goto out_gunlock;
+
+		error = gfs2_inplace_reserve(ndip, &ap);
+		if (error)
+			goto out_gunlock_q;
+
+		error = gfs2_trans_begin(sdp, gfs2_trans_da_blks(ndip, &da, 4) +
+					 4 * RES_LEAF + 4, 0);
+		if (error)
+			goto out_ipreserv;
+	} else {
+		error = gfs2_trans_begin(sdp, 4 * RES_DINODE +
+					 5 * RES_LEAF + 4, 0);
+		if (error)
+			goto out_gunlock;
+	}
+
+	/* Remove the target file, if it exists */
+
+	if (nip)
+		error = gfs2_unlink_inode(ndip, ndentry);
+
+	error = update_moved_ino(ip, ndip, dir_rename);
+	if (error)
+		goto out_end_trans;
+
+	error = gfs2_dir_del(odip, odentry);
+	if (error)
+		goto out_end_trans;
+
+	error = gfs2_dir_add(ndir, &ndentry->d_name, ip, &da);
+	if (error)
+		goto out_end_trans;
+
+out_end_trans:
+	gfs2_trans_end(sdp);
+out_ipreserv:
+	if (da.nr_blocks)
+		gfs2_inplace_release(ndip);
+out_gunlock_q:
+	if (da.nr_blocks)
+		gfs2_quota_unlock(ndip);
+out_gunlock:
+	gfs2_dir_no_add(&da);
+	if (gfs2_holder_initialized(&rd_gh))
+		gfs2_glock_dq_uninit(&rd_gh);
+
+	while (x--) {
+		if (gfs2_holder_queued(ghs + x))
+			gfs2_glock_dq(ghs + x);
+		gfs2_holder_uninit(ghs + x);
+	}
+out_gunlock_r:
+	if (gfs2_holder_initialized(&r_gh))
+		gfs2_glock_dq_uninit(&r_gh);
+out:
+	gfs2_qa_put(ndip);
+	return error;
+}
+
+/**
+ * gfs2_exchange - exchange two files
+ * @odir: Parent directory of old file name
+ * @odentry: The old dentry of the file
+ * @ndir: Parent directory of new file name
+ * @ndentry: The new dentry of the file
+ * @flags: The rename flags
+ *
+ * Returns: errno
+ */
+
+static int gfs2_exchange(struct inode *odir, struct dentry *odentry,
+			 struct inode *ndir, struct dentry *ndentry,
+			 unsigned int flags)
+{
+	struct gfs2_inode *odip = GFS2_I(odir);
+	struct gfs2_inode *ndip = GFS2_I(ndir);
+	struct gfs2_inode *oip = GFS2_I(odentry->d_inode);
+	struct gfs2_inode *nip = GFS2_I(ndentry->d_inode);
+	struct gfs2_sbd *sdp = GFS2_SB(odir);
+	struct gfs2_holder ghs[4], r_gh;
+	unsigned int num_gh;
+	unsigned int x;
+	umode_t old_mode = oip->i_inode.i_mode;
+	umode_t new_mode = nip->i_inode.i_mode;
+	int error;
+
+	gfs2_holder_mark_uninitialized(&r_gh);
+	error = gfs2_rindex_update(sdp);
+	if (error)
+		return error;
+
+	if (odip != ndip) {
+		error = gfs2_glock_nq_init(sdp->sd_rename_gl, LM_ST_EXCLUSIVE,
+					   0, &r_gh);
+		if (error)
+			goto out;
+
+		if (S_ISDIR(old_mode)) {
+			/* don't move a directory into its subdir */
+			error = gfs2_ok_to_move(oip, ndip);
+			if (error)
+				goto out_gunlock_r;
+		}
+
+		if (S_ISDIR(new_mode)) {
+			/* don't move a directory into its subdir */
+			error = gfs2_ok_to_move(nip, odip);
+			if (error)
+				goto out_gunlock_r;
+		}
+	}
+
+	num_gh = 1;
+	gfs2_holder_init(odip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs);
+	if (odip != ndip) {
+		gfs2_holder_init(ndip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC,
+				 ghs + num_gh);
+		num_gh++;
+	}
+	gfs2_holder_init(oip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
+	num_gh++;
+
+	gfs2_holder_init(nip->i_gl, LM_ST_EXCLUSIVE, GL_ASYNC, ghs + num_gh);
+	num_gh++;
+
+	for (x = 0; x < num_gh; x++) {
+		error = gfs2_glock_nq(ghs + x);
+		if (error)
+			goto out_gunlock;
+	}
+
+	error = gfs2_glock_async_wait(num_gh, ghs);
+	if (error)
+		goto out_gunlock;
+
+	error = -ENOENT;
+	if (oip->i_inode.i_nlink == 0 || nip->i_inode.i_nlink == 0)
+		goto out_gunlock;
+
+	error = gfs2_unlink_ok(odip, &odentry->d_name, oip);
+	if (error)
+		goto out_gunlock;
+	error = gfs2_unlink_ok(ndip, &ndentry->d_name, nip);
+	if (error)
+		goto out_gunlock;
+
+	if (S_ISDIR(old_mode)) {
+		error = gfs2_permission(&init_user_ns, odentry->d_inode,
+					MAY_WRITE);
+		if (error)
+			goto out_gunlock;
+	}
+	if (S_ISDIR(new_mode)) {
+		error = gfs2_permission(&init_user_ns, ndentry->d_inode,
+					MAY_WRITE);
+		if (error)
+			goto out_gunlock;
+	}
+	error = gfs2_trans_begin(sdp, 4 * RES_DINODE + 4 * RES_LEAF, 0);
+	if (error)
+		goto out_gunlock;
+
+	error = update_moved_ino(oip, ndip, S_ISDIR(old_mode));
+	if (error)
+		goto out_end_trans;
+
+	error = update_moved_ino(nip, odip, S_ISDIR(new_mode));
+	if (error)
+		goto out_end_trans;
+
+	error = gfs2_dir_mvino(ndip, &ndentry->d_name, oip,
+			       IF2DT(old_mode));
+	if (error)
+		goto out_end_trans;
+
+	error = gfs2_dir_mvino(odip, &odentry->d_name, nip,
+			       IF2DT(new_mode));
+	if (error)
+		goto out_end_trans;
+
+	if (odip != ndip) {
+		if (S_ISDIR(new_mode) && !S_ISDIR(old_mode)) {
+			inc_nlink(&odip->i_inode);
+			drop_nlink(&ndip->i_inode);
+		} else if (S_ISDIR(old_mode) && !S_ISDIR(new_mode)) {
+			inc_nlink(&ndip->i_inode);
+			drop_nlink(&odip->i_inode);
+		}
+	}
+	mark_inode_dirty(&ndip->i_inode);
+	if (odip != ndip)
+		mark_inode_dirty(&odip->i_inode);
+
+out_end_trans:
+	gfs2_trans_end(sdp);
+out_gunlock:
+	while (x--) {
+		if (gfs2_holder_queued(ghs + x))
+			gfs2_glock_dq(ghs + x);
+		gfs2_holder_uninit(ghs + x);
+	}
+out_gunlock_r:
+	if (gfs2_holder_initialized(&r_gh))
+		gfs2_glock_dq_uninit(&r_gh);
+out:
+	return error;
+}
+
+static int gfs2_rename2(struct user_namespace *mnt_userns, struct inode *odir,
+			struct dentry *odentry, struct inode *ndir,
+			struct dentry *ndentry, unsigned int flags)
+{
+	flags &= ~RENAME_NOREPLACE;
+
+	if (flags & ~RENAME_EXCHANGE)
+		return -EINVAL;
+
+	if (flags & RENAME_EXCHANGE)
+		return gfs2_exchange(odir, odentry, ndir, ndentry, flags);
+
+	return gfs2_rename(odir, odentry, ndir, ndentry);
+}
+
+/**
+ * gfs2_get_link - Follow a symbolic link
+ * @dentry: The dentry of the link
+ * @inode: The inode of the link
+ * @done: destructor for return value
+ *
+ * This can handle symlinks of any size.
+ *
+ * Returns: 0 on success or error code
+ */
+
+static const char *gfs2_get_link(struct dentry *dentry,
+				 struct inode *inode,
+				 struct delayed_call *done)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder i_gh;
+	struct buffer_head *dibh;
+	unsigned int size;
+	char *buf;
+	int error;
+
+	if (!dentry)
+		return ERR_PTR(-ECHILD);
+
+	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
+	error = gfs2_glock_nq(&i_gh);
+	if (error) {
+		gfs2_holder_uninit(&i_gh);
+		return ERR_PTR(error);
+	}
+
+	size = (unsigned int)i_size_read(&ip->i_inode);
+	if (size == 0) {
+		gfs2_consist_inode(ip);
+		buf = ERR_PTR(-EIO);
+		goto out;
+	}
+
+	error = gfs2_meta_inode_buffer(ip, &dibh);
+	if (error) {
+		buf = ERR_PTR(error);
+		goto out;
+	}
+
+	buf = kzalloc(size + 1, GFP_NOFS);
+	if (!buf)
+		buf = ERR_PTR(-ENOMEM);
+	else
+		memcpy(buf, dibh->b_data + sizeof(struct gfs2_dinode), size);
+	brelse(dibh);
+out:
+	gfs2_glock_dq_uninit(&i_gh);
+	if (!IS_ERR(buf))
+		set_delayed_call(done, kfree_link, buf);
+	return buf;
+}
+
+/**
+ * gfs2_permission
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @inode: The inode
+ * @mask: The mask to be tested
+ *
+ * This may be called from the VFS directly, or from within GFS2 with the
+ * inode locked, so we look to see if the glock is already locked and only
+ * lock the glock if its not already been done.
+ *
+ * Returns: errno
+ */
+
+int gfs2_permission(struct user_namespace *mnt_userns, struct inode *inode,
+		    int mask)
+{
+	int may_not_block = mask & MAY_NOT_BLOCK;
+	struct gfs2_inode *ip;
+	struct gfs2_holder i_gh;
+	struct gfs2_glock *gl;
+	int error;
+
+	gfs2_holder_mark_uninitialized(&i_gh);
+	ip = GFS2_I(inode);
+	gl = rcu_dereference_check(ip->i_gl, !may_not_block);
+	if (unlikely(!gl)) {
+		/* inode is getting torn down, must be RCU mode */
+		WARN_ON_ONCE(!may_not_block);
+		return -ECHILD;
+        }
+	if (gfs2_glock_is_locked_by_me(gl) == NULL) {
+		if (may_not_block)
+			return -ECHILD;
+		error = gfs2_glock_nq_init(gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
+		if (error)
+			return error;
+	}
+
+	if ((mask & MAY_WRITE) && IS_IMMUTABLE(inode))
+		error = -EPERM;
+	else
+		error = generic_permission(&init_user_ns, inode, mask);
+	if (gfs2_holder_initialized(&i_gh))
+		gfs2_glock_dq_uninit(&i_gh);
+
+	return error;
+}
+
+static int __gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
+{
+	setattr_copy(&init_user_ns, inode, attr);
+	mark_inode_dirty(inode);
+	return 0;
+}
+
+static int gfs2_setattr_simple(struct inode *inode, struct iattr *attr)
+{
+	int error;
+
+	if (current->journal_info)
+		return __gfs2_setattr_simple(inode, attr);
+
+	error = gfs2_trans_begin(GFS2_SB(inode), RES_DINODE, 0);
+	if (error)
+		return error;
+
+	error = __gfs2_setattr_simple(inode, attr);
+	gfs2_trans_end(GFS2_SB(inode));
+	return error;
+}
+
+static int setattr_chown(struct inode *inode, struct iattr *attr)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	kuid_t ouid, nuid;
+	kgid_t ogid, ngid;
+	int error;
+	struct gfs2_alloc_parms ap;
+
+	ouid = inode->i_uid;
+	ogid = inode->i_gid;
+	nuid = attr->ia_uid;
+	ngid = attr->ia_gid;
+
+	if (!(attr->ia_valid & ATTR_UID) || uid_eq(ouid, nuid))
+		ouid = nuid = NO_UID_QUOTA_CHANGE;
+	if (!(attr->ia_valid & ATTR_GID) || gid_eq(ogid, ngid))
+		ogid = ngid = NO_GID_QUOTA_CHANGE;
+	error = gfs2_qa_get(ip);
+	if (error)
+		return error;
+
+	error = gfs2_rindex_update(sdp);
+	if (error)
+		goto out;
+
+	error = gfs2_quota_lock(ip, nuid, ngid);
+	if (error)
+		goto out;
+
+	ap.target = gfs2_get_inode_blocks(&ip->i_inode);
+
+	if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
+	    !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
+		error = gfs2_quota_check(ip, nuid, ngid, &ap);
+		if (error)
+			goto out_gunlock_q;
+	}
+
+	error = gfs2_trans_begin(sdp, RES_DINODE + 2 * RES_QUOTA, 0);
+	if (error)
+		goto out_gunlock_q;
+
+	error = gfs2_setattr_simple(inode, attr);
+	if (error)
+		goto out_end_trans;
+
+	if (!uid_eq(ouid, NO_UID_QUOTA_CHANGE) ||
+	    !gid_eq(ogid, NO_GID_QUOTA_CHANGE)) {
+		gfs2_quota_change(ip, -(s64)ap.target, ouid, ogid);
+		gfs2_quota_change(ip, ap.target, nuid, ngid);
+	}
+
+out_end_trans:
+	gfs2_trans_end(sdp);
+out_gunlock_q:
+	gfs2_quota_unlock(ip);
+out:
+	gfs2_qa_put(ip);
+	return error;
+}
+
+/**
+ * gfs2_setattr - Change attributes on an inode
+ * @mnt_userns: User namespace of the mount the inode was found from
+ * @dentry: The dentry which is changing
+ * @attr: The structure describing the change
+ *
+ * The VFS layer wants to change one or more of an inodes attributes.  Write
+ * that change out to disk.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_setattr(struct user_namespace *mnt_userns,
+			struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *inode = d_inode(dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder i_gh;
+	int error;
+
+	error = gfs2_qa_get(ip);
+	if (error)
+		return error;
+
+	error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
+	if (error)
+		goto out;
+
+	error = may_setattr(&init_user_ns, inode, attr->ia_valid);
+	if (error)
+		goto error;
+
+	error = setattr_prepare(&init_user_ns, dentry, attr);
+	if (error)
+		goto error;
+
+	if (attr->ia_valid & ATTR_SIZE)
+		error = gfs2_setattr_size(inode, attr->ia_size);
+	else if (attr->ia_valid & (ATTR_UID | ATTR_GID))
+		error = setattr_chown(inode, attr);
+	else {
+		error = gfs2_setattr_simple(inode, attr);
+		if (!error && attr->ia_valid & ATTR_MODE)
+			error = posix_acl_chmod(&init_user_ns, inode,
+						inode->i_mode);
+	}
+
+error:
+	if (!error)
+		mark_inode_dirty(inode);
+	gfs2_glock_dq_uninit(&i_gh);
+out:
+	gfs2_qa_put(ip);
+	return error;
+}
+
+/**
+ * gfs2_getattr - Read out an inode's attributes
+ * @mnt_userns:	user namespace of the mount the inode was found from
+ * @path: Object to query
+ * @stat: The inode's stats
+ * @request_mask: Mask of STATX_xxx flags indicating the caller's interests
+ * @flags: AT_STATX_xxx setting
+ *
+ * This may be called from the VFS directly, or from within GFS2 with the
+ * inode locked, so we look to see if the glock is already locked and only
+ * lock the glock if its not already been done. Note that its the NFS
+ * readdirplus operation which causes this to be called (from filldir)
+ * with the glock already held.
+ *
+ * Returns: errno
+ */
+
+static int gfs2_getattr(struct user_namespace *mnt_userns,
+			const struct path *path, struct kstat *stat,
+			u32 request_mask, unsigned int flags)
+{
+	struct inode *inode = d_inode(path->dentry);
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	u32 gfsflags;
+	int error;
+
+	gfs2_holder_mark_uninitialized(&gh);
+	if (gfs2_glock_is_locked_by_me(ip->i_gl) == NULL) {
+		error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &gh);
+		if (error)
+			return error;
+	}
+
+	gfsflags = ip->i_diskflags;
+	if (gfsflags & GFS2_DIF_APPENDONLY)
+		stat->attributes |= STATX_ATTR_APPEND;
+	if (gfsflags & GFS2_DIF_IMMUTABLE)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+
+	stat->attributes_mask |= (STATX_ATTR_APPEND |
+				  STATX_ATTR_COMPRESSED |
+				  STATX_ATTR_ENCRYPTED |
+				  STATX_ATTR_IMMUTABLE |
+				  STATX_ATTR_NODUMP);
+
+	generic_fillattr(&init_user_ns, inode, stat);
+
+	if (gfs2_holder_initialized(&gh))
+		gfs2_glock_dq_uninit(&gh);
+
+	return 0;
+}
+
+static int gfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+		       u64 start, u64 len)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	int ret;
+
+	inode_lock_shared(inode);
+
+	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+	if (ret)
+		goto out;
+
+	ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
+
+	gfs2_glock_dq_uninit(&gh);
+
+out:
+	inode_unlock_shared(inode);
+	return ret;
+}
+
+loff_t gfs2_seek_data(struct file *file, loff_t offset)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	loff_t ret;
+
+	inode_lock_shared(inode);
+	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+	if (!ret)
+		ret = iomap_seek_data(inode, offset, &gfs2_iomap_ops);
+	gfs2_glock_dq_uninit(&gh);
+	inode_unlock_shared(inode);
+
+	if (ret < 0)
+		return ret;
+	return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
+}
+
+loff_t gfs2_seek_hole(struct file *file, loff_t offset)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_holder gh;
+	loff_t ret;
+
+	inode_lock_shared(inode);
+	ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
+	if (!ret)
+		ret = iomap_seek_hole(inode, offset, &gfs2_iomap_ops);
+	gfs2_glock_dq_uninit(&gh);
+	inode_unlock_shared(inode);
+
+	if (ret < 0)
+		return ret;
+	return vfs_setpos(file, ret, inode->i_sb->s_maxbytes);
+}
+
+static int gfs2_update_time(struct inode *inode, struct timespec64 *time,
+			    int flags)
+{
+	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_glock *gl = ip->i_gl;
+	struct gfs2_holder *gh;
+	int error;
+
+	gh = gfs2_glock_is_locked_by_me(gl);
+	if (gh && !gfs2_glock_is_held_excl(gl)) {
+		gfs2_glock_dq(gh);
+		gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, gh);
+		error = gfs2_glock_nq(gh);
+		if (error)
+			return error;
+	}
+	return generic_update_time(inode, time, flags);
+}
+
+static const struct inode_operations gfs2_file_iops = {
+	.permission = gfs2_permission,
+	.setattr = gfs2_setattr,
+	.getattr = gfs2_getattr,
+	.listxattr = gfs2_listxattr,
+	.fiemap = gfs2_fiemap,
+	.get_acl = gfs2_get_acl,
+	.set_acl = gfs2_set_acl,
+	.update_time = gfs2_update_time,
+	.fileattr_get = gfs2_fileattr_get,
+	.fileattr_set = gfs2_fileattr_set,
+};
+
+static const struct inode_operations gfs2_dir_iops = {
+	.create = gfs2_create,
+	.lookup = gfs2_lookup,
+	.link = gfs2_link,
+	.unlink = gfs2_unlink,
+	.symlink = gfs2_symlink,
+	.mkdir = gfs2_mkdir,
+	.rmdir = gfs2_unlink,
+	.mknod = gfs2_mknod,
+	.rename = gfs2_rename2,
+	.permission = gfs2_permission,
+	.setattr = gfs2_setattr,
+	.getattr = gfs2_getattr,
+	.listxattr = gfs2_listxattr,
+	.fiemap = gfs2_fiemap,
+	.get_acl = gfs2_get_acl,
+	.set_acl = gfs2_set_acl,
+	.update_time = gfs2_update_time,
+	.atomic_open = gfs2_atomic_open,
+	.fileattr_get = gfs2_fileattr_get,
+	.fileattr_set = gfs2_fileattr_set,
+};
+
+static const struct inode_operations gfs2_symlink_iops = {
+	.get_link = gfs2_get_link,
+	.permission = gfs2_permission,
+	.setattr = gfs2_setattr,
+	.getattr = gfs2_getattr,
+	.listxattr = gfs2_listxattr,
+	.fiemap = gfs2_fiemap,
+};
+