// 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;
}

void gfs2_setup_inode(struct inode *inode)
{
        gfp_t gfp_mask;

        /*
         * Ensure all page cache allocations are done from GFP_NOFS context to
         * prevent direct reclaim recursion back into the filesystem and blowing
         * stacks or deadlocking.
         */
        gfp_mask = mapping_gfp_mask(inode->i_mapping);
        mapping_set_gfp_mask(inode->i_mapping, gfp_mask & ~__GFP_FS);
}

/**
 * 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_state_read_once(inode) & I_NEW) {
                struct gfs2_sbd *sdp = GFS2_SB(inode);
                struct gfs2_glock *io_gl;
                int extra_flags = 0;

                gfs2_setup_inode(inode);
                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;

                /*
                 * The only caller that sets @blktype to GFS2_BLKST_UNLINKED is
                 * delete_work_func().  Make sure not to cancel the delete work
                 * from within itself here.
                 */
                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_set_atime(inode,
                                1LL << (8 * sizeof(inode_get_atime_sec(inode)) - 1),
                                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);
        if (ip->i_gl) {
                gfs2_glock_put(ip->i_gl);
                ip->i_gl = NULL;
        }
        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);
}


/**
 * gfs2_lookup_meta - Look up an inode in a metadata directory
 * @dip: The directory
 * @name: The name of the inode
 */
struct inode *gfs2_lookup_meta(struct inode *dip, const char *name)
{
        struct qstr qstr;
        struct inode *inode;

        gfs2_str2qstr(&qstr, name);
        inode = gfs2_lookupi(dip, &qstr, 1);
        if (IS_ERR_OR_NULL(inode))
                return inode ? inode : ERR_PTR(-ENOENT);

        /*
         * Must not call back into the filesystem when allocating
         * pages in the metadata inode's address space.
         */
        mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS);

        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(&nop_mnt_idmap, 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(&nop_mnt_idmap, &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);
        if (error)
                goto out_trans_end;

        ip->i_no_formal_ino = ip->i_generation;
        ip->i_inode.i_ino = ip->i_no_addr;
        ip->i_goal = ip->i_no_addr;
        if (*dblocks > 1)
                ip->i_eattr = ip->i_no_addr + 1;

out_trans_end:
        gfs2_trans_end(sdp);
out_ipreserv:
        gfs2_inplace_release(ip);
out_quota:
        gfs2_quota_unlock(ip);
out:
        return error;
}

static void gfs2_final_release_pages(struct gfs2_inode *ip)
{
        struct inode *inode = &ip->i_inode;
        struct gfs2_glock *gl = ip->i_gl;

        /* This can only happen during incomplete inode creation. */
        if (unlikely(!gl))
                return;

        truncate_inode_pages(gfs2_glock2aspace(gl), 0);
        truncate_inode_pages(&inode->i_data, 0);

        if (atomic_read(&gl->gl_revokes) == 0) {
                clear_bit(GLF_LFLUSH, &gl->gl_flags);
                clear_bit(GLF_DIRTY, &gl->gl_flags);
        }
}

int gfs2_dinode_dealloc(struct gfs2_inode *ip)
{
        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
        struct gfs2_rgrpd *rgd;
        struct gfs2_holder gh;
        int error;

        if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
                gfs2_consist_inode(ip);
                return -EIO;
        }

        gfs2_rindex_update(sdp);

        error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
        if (error)
                return error;

        rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
        if (!rgd) {
                gfs2_consist_inode(ip);
                error = -EIO;
                goto out_qs;
        }

        error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
                                   LM_FLAG_NODE_SCOPE, &gh);
        if (error)
                goto out_qs;

        error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
                                 sdp->sd_jdesc->jd_blocks);
        if (error)
                goto out_rg_gunlock;

        gfs2_free_di(rgd, ip);

        gfs2_final_release_pages(ip);

        gfs2_trans_end(sdp);

out_rg_gunlock:
        gfs2_glock_dq_uninit(&gh);
out_qs:
        gfs2_quota_unhold(ip);
        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
 *
 * FIXME: Change to allocate the disk blocks and write them out in the same
 * transaction.  That way, we can no longer end up in a situation in which an
 * inode is allocated, the node crashes, and the block looks like a valid
 * inode.  (With atomic creates in place, we will also no longer need to zero
 * the link count and dirty the inode here on failure.)
 *
 * 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 d_gh, gh;
        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, dealloc_error;
        u32 aflags = 0;
        unsigned blocks = 1;
        struct gfs2_diradd da = { .bh = NULL, .save_loc = 1, };
        bool xattr_initialized = false;

        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, &d_gh);
        if (error)
                goto fail;
        gfs2_holder_mark_uninitialized(&gh);

        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 = NULL;
                        error = -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(&d_gh);
                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;
        gfs2_setup_inode(inode);
        ip = GFS2_I(inode);

        error = posix_acl_create(dir, &mode, &default_acl, &acl);
        if (error)
                goto fail_gunlock;

        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;
        simple_inode_init_ts(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_dealloc_inode;

        error = gfs2_glock_get(sdp, ip->i_no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
        if (error)
                goto fail_dealloc_inode;
        gfs2_cancel_delete_work(io_gl);
        io_gl->gl_no_formal_ino = ip->i_no_formal_ino;

retry:
        error = insert_inode_locked4(inode, ip->i_no_addr, iget_test, &ip->i_no_addr);
        if (error == -EBUSY)
                goto retry;
        if (error)
                goto fail_gunlock2;

        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, &gh);
        if (error)
                goto fail_gunlock3;
        clear_bit(GLF_INSTANTIATE_NEEDED, &ip->i_gl->gl_flags);

        error = gfs2_trans_begin(sdp, blocks, 0);
        if (error)
                goto fail_gunlock3;

        if (blocks > 1) {
                gfs2_init_xattr(ip);
                xattr_initialized = true;
        }
        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);

        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(&d_gh);
        gfs2_qa_put(ip);
        gfs2_glock_dq_uninit(&gh);
        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_dealloc_inode:
        dealloc_error = 0;
        if (ip->i_eattr)
                dealloc_error = gfs2_ea_dealloc(ip, xattr_initialized);
        clear_nlink(inode);
        mark_inode_dirty(inode);
        if (!dealloc_error)
                dealloc_error = gfs2_dinode_dealloc(ip);
        if (dealloc_error)
                fs_warn(sdp, "%s: %d\n", __func__, dealloc_error);
        ip->i_no_addr = 0;
fail_free_inode:
        if (ip->i_gl) {
                gfs2_glock_put(ip->i_gl);
                ip->i_gl = NULL;
        }
        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(&d_gh);
        if (!IS_ERR_OR_NULL(inode)) {
                if (inode_state_read_once(inode) & I_NEW)
                        iget_failed(inode);
                else
                        iput(inode);
        }
        if (gfs2_holder_initialized(&gh))
                gfs2_glock_dq_uninit(&gh);
fail:
        gfs2_qa_put(dip);
        return error;
}

/**
 * gfs2_create - Create a file
 * @idmap: idmap 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 mnt_idmap *idmap, 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 d_gh, gh;
        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, &d_gh);
        gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);

        error = gfs2_glock_nq(&d_gh);
        if (error)
                goto out_parent;

        error = gfs2_glock_nq(&gh);
        if (error)
                goto out_child;

        error = -ENOENT;
        if (inode->i_nlink == 0)
                goto out_gunlock;

        error = gfs2_permission(&nop_mnt_idmap, 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 = -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);
        inode_set_ctime_current(&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(&gh);
out_child:
        gfs2_glock_dq(&d_gh);
out_parent:
        gfs2_qa_put(dip);
        gfs2_holder_uninit(&d_gh);
        gfs2_holder_uninit(&gh);
        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(&nop_mnt_idmap, &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_set_ctime_current(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 d_gh, r_gh, gh;
        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, &d_gh);
        gfs2_holder_init(ip->i_gl,  LM_ST_EXCLUSIVE, 0, &gh);

        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, &r_gh);


        error = gfs2_glock_nq(&d_gh);
        if (error)
                goto out_parent;

        error = gfs2_glock_nq(&gh);
        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(&r_gh); /* 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(&r_gh);
out_rgrp:
        gfs2_glock_dq(&gh);
out_child:
        gfs2_glock_dq(&d_gh);
out_parent:
        gfs2_holder_uninit(&r_gh);
out_inodes:
        gfs2_holder_uninit(&gh);
        gfs2_holder_uninit(&d_gh);
        return error;
}

/**
 * gfs2_symlink - Create a symlink
 * @idmap: idmap 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 mnt_idmap *idmap, 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
 * @idmap: idmap 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: the dentry, or ERR_PTR(errno)
 */

static struct dentry *gfs2_mkdir(struct mnt_idmap *idmap, struct inode *dir,
                                 struct dentry *dentry, umode_t mode)
{
        unsigned dsize = gfs2_max_stuffed_size(GFS2_I(dir));

        return ERR_PTR(gfs2_create_inode(dir, dentry, NULL, S_IFDIR | mode, 0, NULL, dsize, 0));
}

/**
 * gfs2_mknod - Make a special file
 * @idmap: idmap 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 mnt_idmap *idmap, 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)
{
        bool excl = !!(flags & O_EXCL);

        if (d_in_lookup(dentry)) {
                struct dentry *d = __gfs2_lookup(dir, dentry, file);
                if (file->f_mode & FMODE_OPENED) {
                        if (IS_ERR(d))
                                return PTR_ERR(d);
                        dput(d);
                        return excl && (flags & O_CREAT) ? -EEXIST : 0;
                }
                if (d || d_really_is_positive(dentry))
                        return finish_no_open(file, d);
        }
        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);

        inode_set_ctime_current(&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 retries = 0, 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++;
        }

again:
        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, retries);
        if (error == -ESTALE) {
                retries++;
                goto again;
        }
        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(&nop_mnt_idmap, 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(&nop_mnt_idmap, 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 retries = 0, 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++;

again:
        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, retries);
        if (error == -ESTALE) {
                retries++;
                goto again;
        }
        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(&nop_mnt_idmap, odentry->d_inode,
                                        MAY_WRITE);
                if (error)
                        goto out_gunlock;
        }
        if (S_ISDIR(new_mode)) {
                error = gfs2_permission(&nop_mnt_idmap, 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 mnt_idmap *idmap, 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
 * @idmap: idmap 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 mnt_idmap *idmap, 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(&nop_mnt_idmap, 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(&nop_mnt_idmap, 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
 * @idmap: idmap 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 mnt_idmap *idmap,
                        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(&nop_mnt_idmap, inode, attr->ia_valid);
        if (error)
                goto error;

        error = setattr_prepare(&nop_mnt_idmap, 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(&nop_mnt_idmap, dentry,
                                                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
 * @idmap: idmap 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 mnt_idmap *idmap,
                        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(&nop_mnt_idmap, request_mask, inode, stat);

        if (gfs2_holder_initialized(&gh))
                gfs2_glock_dq_uninit(&gh);

        return 0;
}

static bool fault_in_fiemap(struct fiemap_extent_info *fi)
{
        struct fiemap_extent __user *dest = fi->fi_extents_start;
        size_t size = sizeof(*dest) * fi->fi_extents_max;

        return fault_in_safe_writeable((char __user *)dest, size) == 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);

retry:
        ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
        if (ret)
                goto out;

        pagefault_disable();
        ret = iomap_fiemap(inode, fieinfo, start, len, &gfs2_iomap_ops);
        pagefault_enable();

        gfs2_glock_dq_uninit(&gh);

        if (ret == -EFAULT && fault_in_fiemap(fieinfo)) {
                fieinfo->fi_extents_mapped = 0;
                goto retry;
        }

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, enum fs_update_time type,
                unsigned int flags)
{
        struct gfs2_inode *ip = GFS2_I(inode);
        struct gfs2_glock *gl = ip->i_gl;
        struct gfs2_holder *gh;
        int error;

        if (flags & IOCB_NOWAIT)
                return -EAGAIN;

        gh = gfs2_glock_is_locked_by_me(gl);
        if (gh && gl->gl_state != LM_ST_EXCLUSIVE) {
                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, type, 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_inode_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_inode_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,
};