// SPDX-License-Identifier: GPL-2.0

  /*

   * Copyright (c) 2000-2006 Silicon Graphics, Inc.

   * All Rights Reserved.

   */

  #include "xfs.h"

  #include "xfs_shared.h"

  #include "xfs_format.h"

  #include "xfs_log_format.h"
  #include "xfs_trans_resv.h"

  #include "xfs_sb.h"

  #include "xfs_mount.h"

  #include "xfs_inode.h"

  #include "xfs_btree.h"

  #include "xfs_bmap.h"

  #include "xfs_alloc.h"

  #include "xfs_fsops.h"

  #include "xfs_trans.h"

  #include "xfs_buf_item.h"

  #include "xfs_log.h"

  #include "xfs_log_priv.h"

  #include "xfs_dir2.h"

  #include "xfs_extfree_item.h"
  #include "xfs_mru_cache.h"
  #include "xfs_inode_item.h"

  #include "xfs_icache.h"

  #include "xfs_trace.h"

  #include "xfs_icreate_item.h"

  #include "xfs_filestream.h"
  #include "xfs_quota.h"

  #include "xfs_sysfs.h"

  #include "xfs_ondisk.h"

  #include "xfs_rmap_item.h"

  #include "xfs_refcount_item.h"

  #include "xfs_bmap_item.h"

  #include "xfs_reflink.h"

  #include <linux/magic.h>

  #include <linux/fs_context.h>
  #include <linux/fs_parser.h>

  static const struct super_operations xfs_super_operations;

  static struct kset *xfs_kset;		/* top-level xfs sysfs dir */

  #ifdef DEBUG
  static struct xfs_kobj xfs_dbg_kobj;	/* global debug sysfs attrs */
  #endif

  enum xfs_dax_mode {
  	XFS_DAX_INODE = 0,
  	XFS_DAX_ALWAYS = 1,
  	XFS_DAX_NEVER = 2,
  };
  
  static void
  xfs_mount_set_dax_mode(
  	struct xfs_mount	*mp,
  	enum xfs_dax_mode	mode)
  {
  	switch (mode) {
  	case XFS_DAX_INODE:
  		mp->m_flags &= ~(XFS_MOUNT_DAX_ALWAYS | XFS_MOUNT_DAX_NEVER);
  		break;
  	case XFS_DAX_ALWAYS:
  		mp->m_flags |= XFS_MOUNT_DAX_ALWAYS;
  		mp->m_flags &= ~XFS_MOUNT_DAX_NEVER;
  		break;
  	case XFS_DAX_NEVER:
  		mp->m_flags |= XFS_MOUNT_DAX_NEVER;
  		mp->m_flags &= ~XFS_MOUNT_DAX_ALWAYS;
  		break;
  	}
  }
  
  static const struct constant_table dax_param_enums[] = {
  	{"inode",	XFS_DAX_INODE },
  	{"always",	XFS_DAX_ALWAYS },
  	{"never",	XFS_DAX_NEVER },
  	{}
  };

  /*
   * Table driven mount option parser.

   */
  enum {

  	Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev,

  	Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,

  	Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,

  	Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
  	Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
  	Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
  	Opt_prjquota, Opt_uquota, Opt_gquota, Opt_pquota,

  	Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce,

  	Opt_discard, Opt_nodiscard, Opt_dax, Opt_dax_enum,

  };

  static const struct fs_parameter_spec xfs_fs_parameters[] = {

  	fsparam_u32("logbufs",		Opt_logbufs),
  	fsparam_string("logbsize",	Opt_logbsize),
  	fsparam_string("logdev",	Opt_logdev),
  	fsparam_string("rtdev",		Opt_rtdev),
  	fsparam_flag("wsync",		Opt_wsync),
  	fsparam_flag("noalign",		Opt_noalign),
  	fsparam_flag("swalloc",		Opt_swalloc),
  	fsparam_u32("sunit",		Opt_sunit),
  	fsparam_u32("swidth",		Opt_swidth),
  	fsparam_flag("nouuid",		Opt_nouuid),
  	fsparam_flag("grpid",		Opt_grpid),
  	fsparam_flag("nogrpid",		Opt_nogrpid),
  	fsparam_flag("bsdgroups",	Opt_bsdgroups),
  	fsparam_flag("sysvgroups",	Opt_sysvgroups),
  	fsparam_string("allocsize",	Opt_allocsize),
  	fsparam_flag("norecovery",	Opt_norecovery),
  	fsparam_flag("inode64",		Opt_inode64),
  	fsparam_flag("inode32",		Opt_inode32),
  	fsparam_flag("ikeep",		Opt_ikeep),
  	fsparam_flag("noikeep",		Opt_noikeep),
  	fsparam_flag("largeio",		Opt_largeio),
  	fsparam_flag("nolargeio",	Opt_nolargeio),
  	fsparam_flag("attr2",		Opt_attr2),
  	fsparam_flag("noattr2",		Opt_noattr2),
  	fsparam_flag("filestreams",	Opt_filestreams),
  	fsparam_flag("quota",		Opt_quota),
  	fsparam_flag("noquota",		Opt_noquota),
  	fsparam_flag("usrquota",	Opt_usrquota),
  	fsparam_flag("grpquota",	Opt_grpquota),
  	fsparam_flag("prjquota",	Opt_prjquota),
  	fsparam_flag("uquota",		Opt_uquota),
  	fsparam_flag("gquota",		Opt_gquota),
  	fsparam_flag("pquota",		Opt_pquota),
  	fsparam_flag("uqnoenforce",	Opt_uqnoenforce),
  	fsparam_flag("gqnoenforce",	Opt_gqnoenforce),
  	fsparam_flag("pqnoenforce",	Opt_pqnoenforce),
  	fsparam_flag("qnoenforce",	Opt_qnoenforce),
  	fsparam_flag("discard",		Opt_discard),
  	fsparam_flag("nodiscard",	Opt_nodiscard),
  	fsparam_flag("dax",		Opt_dax),

  	fsparam_enum("dax",		Opt_dax_enum, dax_param_enums),

  	{}

  };

  struct proc_xfs_info {

  	uint64_t	flag;
  	char		*str;

  };

  static int
  xfs_fs_show_options(
  	struct seq_file		*m,
  	struct dentry		*root)

  {
  	static struct proc_xfs_info xfs_info_set[] = {
  		/* the few simple ones we can get from the mount struct */

  		{ XFS_MOUNT_IKEEP,		",ikeep" },
  		{ XFS_MOUNT_WSYNC,		",wsync" },
  		{ XFS_MOUNT_NOALIGN,		",noalign" },
  		{ XFS_MOUNT_SWALLOC,		",swalloc" },
  		{ XFS_MOUNT_NOUUID,		",nouuid" },
  		{ XFS_MOUNT_NORECOVERY,		",norecovery" },
  		{ XFS_MOUNT_ATTR2,		",attr2" },
  		{ XFS_MOUNT_FILESTREAMS,	",filestreams" },
  		{ XFS_MOUNT_GRPID,		",grpid" },
  		{ XFS_MOUNT_DISCARD,		",discard" },

  		{ XFS_MOUNT_LARGEIO,		",largeio" },

  		{ XFS_MOUNT_DAX_ALWAYS,		",dax=always" },
  		{ XFS_MOUNT_DAX_NEVER,		",dax=never" },

  		{ 0, NULL }
  	};

  	struct xfs_mount	*mp = XFS_M(root->d_sb);

  	struct proc_xfs_info	*xfs_infop;
  
  	for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) {
  		if (mp->m_flags & xfs_infop->flag)
  			seq_puts(m, xfs_infop->str);
  	}

  
  	seq_printf(m, ",inode%d",
  		(mp->m_flags & XFS_MOUNT_SMALL_INUMS) ? 32 : 64);

  	if (mp->m_flags & XFS_MOUNT_ALLOCSIZE)

  		seq_printf(m, ",allocsize=%dk",

  			   (1 << mp->m_allocsize_log) >> 10);

  
  	if (mp->m_logbufs > 0)

  		seq_printf(m, ",logbufs=%d", mp->m_logbufs);

  	if (mp->m_logbsize > 0)

  		seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10);

  
  	if (mp->m_logname)

  		seq_show_option(m, "logdev", mp->m_logname);

  	if (mp->m_rtname)

  		seq_show_option(m, "rtdev", mp->m_rtname);

  
  	if (mp->m_dalign > 0)

  		seq_printf(m, ",sunit=%d",

  				(int)XFS_FSB_TO_BB(mp, mp->m_dalign));
  	if (mp->m_swidth > 0)

  		seq_printf(m, ",swidth=%d",

  				(int)XFS_FSB_TO_BB(mp, mp->m_swidth));
  
  	if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD))

  		seq_puts(m, ",usrquota");

  	else if (mp->m_qflags & XFS_UQUOTA_ACCT)

  		seq_puts(m, ",uqnoenforce");

  	if (mp->m_qflags & XFS_PQUOTA_ACCT) {

  		if (mp->m_qflags & XFS_PQUOTA_ENFD)

  			seq_puts(m, ",prjquota");

  		else

  			seq_puts(m, ",pqnoenforce");

  	}
  	if (mp->m_qflags & XFS_GQUOTA_ACCT) {

  		if (mp->m_qflags & XFS_GQUOTA_ENFD)

  			seq_puts(m, ",grpquota");

  		else

  			seq_puts(m, ",gqnoenforce");

  	}

  
  	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))

  		seq_puts(m, ",noquota");

  
  	return 0;

  }

  /*

   * Set parameters for inode allocation heuristics, taking into account
   * filesystem size and inode32/inode64 mount options; i.e. specifically
   * whether or not XFS_MOUNT_SMALL_INUMS is set.
   *
   * Inode allocation patterns are altered only if inode32 is requested
   * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large.
   * If altered, XFS_MOUNT_32BITINODES is set as well.
   *
   * An agcount independent of that in the mount structure is provided
   * because in the growfs case, mp->m_sb.sb_agcount is not yet updated
   * to the potentially higher ag count.
   *
   * Returns the maximum AG index which may contain inodes.

   */

  xfs_agnumber_t

  xfs_set_inode_alloc(
  	struct xfs_mount *mp,
  	xfs_agnumber_t	agcount)

  {

  	xfs_agnumber_t	index;

  	xfs_agnumber_t	maxagi = 0;

  	xfs_sb_t	*sbp = &mp->m_sb;
  	xfs_agnumber_t	max_metadata;

  	xfs_agino_t	agino;
  	xfs_ino_t	ino;

  	/*
  	 * Calculate how much should be reserved for inodes to meet
  	 * the max inode percentage.  Used only for inode32.

  	 */

  	if (M_IGEO(mp)->maxicount) {

  		uint64_t	icount;

  
  		icount = sbp->sb_dblocks * sbp->sb_imax_pct;
  		do_div(icount, 100);
  		icount += sbp->sb_agblocks - 1;
  		do_div(icount, sbp->sb_agblocks);
  		max_metadata = icount;
  	} else {

  		max_metadata = agcount;

  	}

  	/* Get the last possible inode in the filesystem */

  	agino =	XFS_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1);

  	ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino);
  
  	/*
  	 * If user asked for no more than 32-bit inodes, and the fs is
  	 * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter
  	 * the allocator to accommodate the request.
  	 */
  	if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32)
  		mp->m_flags |= XFS_MOUNT_32BITINODES;
  	else
  		mp->m_flags &= ~XFS_MOUNT_32BITINODES;

  	for (index = 0; index < agcount; index++) {

  		struct xfs_perag	*pag;

  		ino = XFS_AGINO_TO_INO(mp, index, agino);

  
  		pag = xfs_perag_get(mp, index);

  		if (mp->m_flags & XFS_MOUNT_32BITINODES) {
  			if (ino > XFS_MAXINUMBER_32) {
  				pag->pagi_inodeok = 0;
  				pag->pagf_metadata = 0;
  			} else {
  				pag->pagi_inodeok = 1;
  				maxagi++;
  				if (index < max_metadata)
  					pag->pagf_metadata = 1;
  				else
  					pag->pagf_metadata = 0;
  			}
  		} else {
  			pag->pagi_inodeok = 1;
  			pag->pagf_metadata = 0;
  		}

  		xfs_perag_put(pag);
  	}

  	return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount;

  }

  STATIC int

  xfs_blkdev_get(
  	xfs_mount_t		*mp,
  	const char		*name,
  	struct block_device	**bdevp)
  {
  	int			error = 0;

  	*bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL,
  				    mp);

  	if (IS_ERR(*bdevp)) {
  		error = PTR_ERR(*bdevp);

  		xfs_warn(mp, "Invalid device [%s], error=%d", name, error);

  	}

  	return error;

  }

  STATIC void

  xfs_blkdev_put(
  	struct block_device	*bdev)
  {
  	if (bdev)

  		blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);

  }

  void
  xfs_blkdev_issue_flush(
  	xfs_buftarg_t		*buftarg)
  {

  	blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS);

  }

  STATIC void
  xfs_close_devices(
  	struct xfs_mount	*mp)
  {

  	struct dax_device *dax_ddev = mp->m_ddev_targp->bt_daxdev;

  	if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {

  		struct block_device *logdev = mp->m_logdev_targp->bt_bdev;

  		struct dax_device *dax_logdev = mp->m_logdev_targp->bt_daxdev;

  		xfs_free_buftarg(mp->m_logdev_targp);

  		xfs_blkdev_put(logdev);

  		fs_put_dax(dax_logdev);

  	}
  	if (mp->m_rtdev_targp) {

  		struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev;

  		struct dax_device *dax_rtdev = mp->m_rtdev_targp->bt_daxdev;

  		xfs_free_buftarg(mp->m_rtdev_targp);

  		xfs_blkdev_put(rtdev);

  		fs_put_dax(dax_rtdev);

  	}

  	xfs_free_buftarg(mp->m_ddev_targp);

  	fs_put_dax(dax_ddev);

  }
  
  /*
   * The file system configurations are:
   *	(1) device (partition) with data and internal log
   *	(2) logical volume with data and log subvolumes.
   *	(3) logical volume with data, log, and realtime subvolumes.
   *
   * We only have to handle opening the log and realtime volumes here if
   * they are present.  The data subvolume has already been opened by
   * get_sb_bdev() and is stored in sb->s_bdev.
   */
  STATIC int
  xfs_open_devices(

  	struct xfs_mount	*mp)

  {
  	struct block_device	*ddev = mp->m_super->s_bdev;

  	struct dax_device	*dax_ddev = fs_dax_get_by_bdev(ddev);
  	struct dax_device	*dax_logdev = NULL, *dax_rtdev = NULL;

  	struct block_device	*logdev = NULL, *rtdev = NULL;
  	int			error;
  
  	/*
  	 * Open real time and log devices - order is important.
  	 */

  	if (mp->m_logname) {
  		error = xfs_blkdev_get(mp, mp->m_logname, &logdev);

  		if (error)
  			goto out;

  		dax_logdev = fs_dax_get_by_bdev(logdev);

  	}

  	if (mp->m_rtname) {
  		error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev);

  		if (error)
  			goto out_close_logdev;
  
  		if (rtdev == ddev || rtdev == logdev) {

  			xfs_warn(mp,
  	"Cannot mount filesystem with identical rtdev and ddev/logdev.");

  			error = -EINVAL;

  			goto out_close_rtdev;
  		}

  		dax_rtdev = fs_dax_get_by_bdev(rtdev);

  	}
  
  	/*
  	 * Setup xfs_mount buffer target pointers
  	 */

  	error = -ENOMEM;

  	mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev, dax_ddev);

  	if (!mp->m_ddev_targp)
  		goto out_close_rtdev;
  
  	if (rtdev) {

  		mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, dax_rtdev);

  		if (!mp->m_rtdev_targp)
  			goto out_free_ddev_targ;
  	}
  
  	if (logdev && logdev != ddev) {

  		mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, dax_logdev);

  		if (!mp->m_logdev_targp)
  			goto out_free_rtdev_targ;
  	} else {
  		mp->m_logdev_targp = mp->m_ddev_targp;
  	}
  
  	return 0;
  
   out_free_rtdev_targ:
  	if (mp->m_rtdev_targp)

  		xfs_free_buftarg(mp->m_rtdev_targp);

   out_free_ddev_targ:

  	xfs_free_buftarg(mp->m_ddev_targp);

   out_close_rtdev:

  	xfs_blkdev_put(rtdev);

  	fs_put_dax(dax_rtdev);

   out_close_logdev:

  	if (logdev && logdev != ddev) {

  		xfs_blkdev_put(logdev);

  		fs_put_dax(dax_logdev);
  	}

   out:

  	fs_put_dax(dax_ddev);

  	return error;
  }

  /*
   * Setup xfs_mount buffer target pointers based on superblock
   */
  STATIC int
  xfs_setup_devices(
  	struct xfs_mount	*mp)
  {
  	int			error;

  	error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize);

  	if (error)
  		return error;
  
  	if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) {
  		unsigned int	log_sector_size = BBSIZE;
  
  		if (xfs_sb_version_hassector(&mp->m_sb))
  			log_sector_size = mp->m_sb.sb_logsectsize;
  		error = xfs_setsize_buftarg(mp->m_logdev_targp,

  					    log_sector_size);
  		if (error)
  			return error;
  	}
  	if (mp->m_rtdev_targp) {
  		error = xfs_setsize_buftarg(mp->m_rtdev_targp,

  					    mp->m_sb.sb_sectsize);
  		if (error)
  			return error;
  	}
  
  	return 0;
  }

  STATIC int
  xfs_init_mount_workqueues(
  	struct xfs_mount	*mp)
  {

  	mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s",

  			WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_super->s_id);

  	if (!mp->m_buf_workqueue)
  		goto out;

  	mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",

  			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);

  	if (!mp->m_unwritten_workqueue)

  		goto out_destroy_buf;

  	mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",

  			WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_UNBOUND,

  			0, mp->m_super->s_id);

  	if (!mp->m_cil_workqueue)
  		goto out_destroy_unwritten;

  
  	mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s",

  			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);

  	if (!mp->m_reclaim_workqueue)
  		goto out_destroy_cil;

  	mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",

  			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_super->s_id);

  	if (!mp->m_eofblocks_workqueue)

  		goto out_destroy_reclaim;

  	mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,

  					       mp->m_super->s_id);

  	if (!mp->m_sync_workqueue)
  		goto out_destroy_eofb;

  	return 0;

  out_destroy_eofb:
  	destroy_workqueue(mp->m_eofblocks_workqueue);

  out_destroy_reclaim:
  	destroy_workqueue(mp->m_reclaim_workqueue);
  out_destroy_cil:
  	destroy_workqueue(mp->m_cil_workqueue);

  out_destroy_unwritten:
  	destroy_workqueue(mp->m_unwritten_workqueue);

  out_destroy_buf:
  	destroy_workqueue(mp->m_buf_workqueue);

  out:
  	return -ENOMEM;
  }
  
  STATIC void
  xfs_destroy_mount_workqueues(
  	struct xfs_mount	*mp)
  {

  	destroy_workqueue(mp->m_sync_workqueue);

  	destroy_workqueue(mp->m_eofblocks_workqueue);

  	destroy_workqueue(mp->m_reclaim_workqueue);

  	destroy_workqueue(mp->m_cil_workqueue);

  	destroy_workqueue(mp->m_unwritten_workqueue);

  	destroy_workqueue(mp->m_buf_workqueue);

  }

  static void
  xfs_flush_inodes_worker(
  	struct work_struct	*work)
  {
  	struct xfs_mount	*mp = container_of(work, struct xfs_mount,
  						   m_flush_inodes_work);
  	struct super_block	*sb = mp->m_super;
  
  	if (down_read_trylock(&sb->s_umount)) {
  		sync_inodes_sb(sb);
  		up_read(&sb->s_umount);
  	}
  }

  /*
   * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK
   * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting
   * for IO to complete so that we effectively throttle multiple callers to the
   * rate at which IO is completing.
   */
  void
  xfs_flush_inodes(
  	struct xfs_mount	*mp)
  {

  	/*
  	 * If flush_work() returns true then that means we waited for a flush
  	 * which was already in progress.  Don't bother running another scan.
  	 */
  	if (flush_work(&mp->m_flush_inodes_work))

  		return;

  	queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work);
  	flush_work(&mp->m_flush_inodes_work);

  }

  /* Catch misguided souls that try to use this interface on XFS */

  STATIC struct inode *

  xfs_fs_alloc_inode(

  	struct super_block	*sb)
  {

  	BUG();

  	return NULL;

  }

  #ifdef DEBUG
  static void
  xfs_check_delalloc(
  	struct xfs_inode	*ip,
  	int			whichfork)
  {
  	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
  	struct xfs_bmbt_irec	got;
  	struct xfs_iext_cursor	icur;
  
  	if (!ifp || !xfs_iext_lookup_extent(ip, ifp, 0, &icur, &got))
  		return;
  	do {
  		if (isnullstartblock(got.br_startblock)) {
  			xfs_warn(ip->i_mount,
  	"ino %llx %s fork has delalloc extent at [0x%llx:0x%llx]",
  				ip->i_ino,
  				whichfork == XFS_DATA_FORK ? "data" : "cow",
  				got.br_startoff, got.br_blockcount);
  		}
  	} while (xfs_iext_next_extent(ifp, &icur, &got));
  }
  #else
  #define xfs_check_delalloc(ip, whichfork)	do { } while (0)
  #endif

  /*

   * Now that the generic code is guaranteed not to be accessing

   * the linux inode, we can inactivate and reclaim the inode.

   */

  STATIC void

  xfs_fs_destroy_inode(

  	struct inode		*inode)

  {

  	struct xfs_inode	*ip = XFS_I(inode);

  	trace_xfs_destroy_inode(ip);

  	ASSERT(!rwsem_is_locked(&inode->i_rwsem));

  	XFS_STATS_INC(ip->i_mount, vn_rele);
  	XFS_STATS_INC(ip->i_mount, vn_remove);
  
  	xfs_inactive(ip);

  	if (!XFS_FORCED_SHUTDOWN(ip->i_mount) && ip->i_delayed_blks) {
  		xfs_check_delalloc(ip, XFS_DATA_FORK);
  		xfs_check_delalloc(ip, XFS_COW_FORK);
  		ASSERT(0);
  	}

  	XFS_STATS_INC(ip->i_mount, vn_reclaim);

  
  	/*
  	 * We should never get here with one of the reclaim flags already set.
  	 */
  	ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE));
  	ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM));
  
  	/*

  	 * We always use background reclaim here because even if the inode is
  	 * clean, it still may be under IO and hence we have wait for IO
  	 * completion to occur before we can reclaim the inode. The background
  	 * reclaim path handles this more efficiently than we can here, so
  	 * simply let background reclaim tear down all inodes.

  	 */

  	xfs_inode_set_reclaim_tag(ip);

  }

  static void
  xfs_fs_dirty_inode(
  	struct inode			*inode,
  	int				flag)
  {
  	struct xfs_inode		*ip = XFS_I(inode);
  	struct xfs_mount		*mp = ip->i_mount;
  	struct xfs_trans		*tp;
  
  	if (!(inode->i_sb->s_flags & SB_LAZYTIME))
  		return;
  	if (flag != I_DIRTY_SYNC || !(inode->i_state & I_DIRTY_TIME))
  		return;
  
  	if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
  		return;
  	xfs_ilock(ip, XFS_ILOCK_EXCL);
  	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
  	xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
  	xfs_trans_commit(tp);
  }

  /*
   * Slab object creation initialisation for the XFS inode.
   * This covers only the idempotent fields in the XFS inode;
   * all other fields need to be initialised on allocation

   * from the slab. This avoids the need to repeatedly initialise

   * fields in the xfs inode that left in the initialise state
   * when freeing the inode.
   */

  STATIC void
  xfs_fs_inode_init_once(

  	void			*inode)
  {
  	struct xfs_inode	*ip = inode;
  
  	memset(ip, 0, sizeof(struct xfs_inode));

  
  	/* vfs inode */
  	inode_init_once(VFS_I(ip));
  
  	/* xfs inode */

  	atomic_set(&ip->i_pincount, 0);
  	spin_lock_init(&ip->i_flags_lock);

  	mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
  		     "xfsino", ip->i_ino);

  	mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER,
  		     "xfsino", ip->i_ino);

  }

  /*
   * We do an unlocked check for XFS_IDONTCACHE here because we are already
   * serialised against cache hits here via the inode->i_lock and igrab() in
   * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be
   * racing with us, and it avoids needing to grab a spinlock here for every inode
   * we drop the final reference on.
   */
  STATIC int
  xfs_fs_drop_inode(
  	struct inode		*inode)
  {
  	struct xfs_inode	*ip = XFS_I(inode);

  	/*
  	 * If this unlinked inode is in the middle of recovery, don't
  	 * drop the inode just yet; log recovery will take care of
  	 * that.  See the comment for this inode flag.
  	 */
  	if (ip->i_flags & XFS_IRECOVERY) {
  		ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED);
  		return 0;
  	}

  	return generic_drop_inode(inode);

  }

  static void
  xfs_mount_free(

  	struct xfs_mount	*mp)
  {

  	kfree(mp->m_rtname);
  	kfree(mp->m_logname);

  	kmem_free(mp);

  }

  STATIC int

  xfs_fs_sync_fs(

  	struct super_block	*sb,
  	int			wait)
  {

  	struct xfs_mount	*mp = XFS_M(sb);

  	/*

  	 * Doing anything during the async pass would be counterproductive.

  	 */

  	if (!wait)

  		return 0;

  	xfs_log_force(mp, XFS_LOG_SYNC);

  	if (laptop_mode) {

  		/*
  		 * The disk must be active because we're syncing.

  		 * We schedule log work now (now that the disk is

  		 * active) instead of later (when it might not be).
  		 */

  		flush_delayed_work(&mp->m_log->l_work);

  	}

  	return 0;

  }
  
  STATIC int

  xfs_fs_statfs(

  	struct dentry		*dentry,

  	struct kstatfs		*statp)
  {

  	struct xfs_mount	*mp = XFS_M(dentry->d_sb);
  	xfs_sb_t		*sbp = &mp->m_sb;

  	struct xfs_inode	*ip = XFS_I(d_inode(dentry));

  	uint64_t		fakeinos, id;
  	uint64_t		icount;
  	uint64_t		ifree;
  	uint64_t		fdblocks;

  	xfs_extlen_t		lsize;

  	int64_t			ffree;

  	statp->f_type = XFS_SUPER_MAGIC;

  	statp->f_namelen = MAXNAMELEN - 1;
  
  	id = huge_encode_dev(mp->m_ddev_targp->bt_dev);

  	statp->f_fsid = u64_to_fsid(id);

  	icount = percpu_counter_sum(&mp->m_icount);

  	ifree = percpu_counter_sum(&mp->m_ifree);

  	fdblocks = percpu_counter_sum(&mp->m_fdblocks);

  
  	spin_lock(&mp->m_sb_lock);
  	statp->f_bsize = sbp->sb_blocksize;
  	lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0;
  	statp->f_blocks = sbp->sb_dblocks - lsize;

  	spin_unlock(&mp->m_sb_lock);

  	/* make sure statp->f_bfree does not underflow */
  	statp->f_bfree = max_t(int64_t, fdblocks - mp->m_alloc_set_aside, 0);

  	statp->f_bavail = statp->f_bfree;

  	fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);

  	statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);

  	if (M_IGEO(mp)->maxicount)

  		statp->f_files = min_t(typeof(statp->f_files),
  					statp->f_files,

  					M_IGEO(mp)->maxicount);

  	/* If sb_icount overshot maxicount, report actual allocation */
  	statp->f_files = max_t(typeof(statp->f_files),
  					statp->f_files,
  					sbp->sb_icount);

  	/* make sure statp->f_ffree does not underflow */

  	ffree = statp->f_files - (icount - ifree);

  	statp->f_ffree = max_t(int64_t, ffree, 0);

  	if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&

  	    ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
  			      (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))

  		xfs_qm_statvfs(ip, statp);

  
  	if (XFS_IS_REALTIME_MOUNT(mp) &&
  	    (ip->i_d.di_flags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) {
  		statp->f_blocks = sbp->sb_rblocks;
  		statp->f_bavail = statp->f_bfree =
  			sbp->sb_frextents * sbp->sb_rextsize;
  	}

  	return 0;

  }

  STATIC void
  xfs_save_resvblks(struct xfs_mount *mp)
  {

  	uint64_t resblks = 0;

  
  	mp->m_resblks_save = mp->m_resblks;
  	xfs_reserve_blocks(mp, &resblks, NULL);
  }
  
  STATIC void
  xfs_restore_resvblks(struct xfs_mount *mp)
  {

  	uint64_t resblks;

  
  	if (mp->m_resblks_save) {
  		resblks = mp->m_resblks_save;
  		mp->m_resblks_save = 0;
  	} else
  		resblks = xfs_default_resblks(mp);
  
  	xfs_reserve_blocks(mp, &resblks, NULL);
  }

  /*
   * Trigger writeback of all the dirty metadata in the file system.
   *
   * This ensures that the metadata is written to their location on disk rather
   * than just existing in transactions in the log. This means after a quiesce
   * there is no log replay required to write the inodes to disk - this is the
   * primary difference between a sync and a quiesce.
   *

   * We cancel log work early here to ensure all transactions the log worker may
   * run have finished before we clean up and log the superblock and write an
   * unmount record. The unfreeze process is responsible for restarting the log
   * worker correctly.

   */
  void
  xfs_quiesce_attr(
  	struct xfs_mount	*mp)
  {
  	int	error = 0;

  	cancel_delayed_work_sync(&mp->m_log->l_work);

  
  	/* force the log to unpin objects from the now complete transactions */
  	xfs_log_force(mp, XFS_LOG_SYNC);

  
  	/* Push the superblock and write an unmount record */
  	error = xfs_log_sbcount(mp);
  	if (error)
  		xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. "
  				"Frozen image may not be consistent.");

  	xfs_log_quiesce(mp);
  }
  
  /*
   * Second stage of a freeze. The data is already frozen so we only
   * need to take care of the metadata. Once that's done sync the superblock
   * to the log to dirty it in case of a crash while frozen. This ensures that we
   * will recover the unlinked inode lists on the next mount.
   */
  STATIC int
  xfs_fs_freeze(
  	struct super_block	*sb)
  {
  	struct xfs_mount	*mp = XFS_M(sb);

  	unsigned int		flags;
  	int			ret;

  	/*
  	 * The filesystem is now frozen far enough that memory reclaim
  	 * cannot safely operate on the filesystem. Hence we need to
  	 * set a GFP_NOFS context here to avoid recursion deadlocks.
  	 */
  	flags = memalloc_nofs_save();

  	xfs_stop_block_reaping(mp);
  	xfs_save_resvblks(mp);
  	xfs_quiesce_attr(mp);

  	ret = xfs_sync_sb(mp, true);
  	memalloc_nofs_restore(flags);
  	return ret;

  }
  
  STATIC int
  xfs_fs_unfreeze(
  	struct super_block	*sb)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	xfs_restore_resvblks(mp);
  	xfs_log_work_queue(mp);
  	xfs_start_block_reaping(mp);
  	return 0;
  }
  
  /*
   * This function fills in xfs_mount_t fields based on mount args.
   * Note: the superblock _has_ now been read in.
   */
  STATIC int
  xfs_finish_flags(
  	struct xfs_mount	*mp)
  {
  	int			ronly = (mp->m_flags & XFS_MOUNT_RDONLY);
  
  	/* Fail a mount where the logbuf is smaller than the log stripe */
  	if (xfs_sb_version_haslogv2(&mp->m_sb)) {
  		if (mp->m_logbsize <= 0 &&
  		    mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) {
  			mp->m_logbsize = mp->m_sb.sb_logsunit;
  		} else if (mp->m_logbsize > 0 &&
  			   mp->m_logbsize < mp->m_sb.sb_logsunit) {
  			xfs_warn(mp,
  		"logbuf size must be greater than or equal to log stripe size");
  			return -EINVAL;
  		}
  	} else {
  		/* Fail a mount if the logbuf is larger than 32K */
  		if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) {
  			xfs_warn(mp,
  		"logbuf size for version 1 logs must be 16K or 32K");
  			return -EINVAL;
  		}
  	}
  
  	/*
  	 * V5 filesystems always use attr2 format for attributes.
  	 */
  	if (xfs_sb_version_hascrc(&mp->m_sb) &&
  	    (mp->m_flags & XFS_MOUNT_NOATTR2)) {
  		xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. "
  			     "attr2 is always enabled for V5 filesystems.");
  		return -EINVAL;
  	}
  
  	/*
  	 * mkfs'ed attr2 will turn on attr2 mount unless explicitly
  	 * told by noattr2 to turn it off
  	 */
  	if (xfs_sb_version_hasattr2(&mp->m_sb) &&
  	    !(mp->m_flags & XFS_MOUNT_NOATTR2))
  		mp->m_flags |= XFS_MOUNT_ATTR2;
  
  	/*
  	 * prohibit r/w mounts of read-only filesystems
  	 */
  	if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) {
  		xfs_warn(mp,
  			"cannot mount a read-only filesystem as read-write");
  		return -EROFS;
  	}
  
  	if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) &&
  	    (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) &&
  	    !xfs_sb_version_has_pquotino(&mp->m_sb)) {
  		xfs_warn(mp,
  		  "Super block does not support project and group quota together");
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static int
  xfs_init_percpu_counters(
  	struct xfs_mount	*mp)
  {
  	int		error;
  
  	error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL);
  	if (error)
  		return -ENOMEM;
  
  	error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL);
  	if (error)
  		goto free_icount;
  
  	error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL);
  	if (error)
  		goto free_ifree;
  
  	error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
  	if (error)
  		goto free_fdblocks;
  
  	return 0;
  
  free_fdblocks:
  	percpu_counter_destroy(&mp->m_fdblocks);
  free_ifree:
  	percpu_counter_destroy(&mp->m_ifree);
  free_icount:
  	percpu_counter_destroy(&mp->m_icount);
  	return -ENOMEM;
  }
  
  void
  xfs_reinit_percpu_counters(
  	struct xfs_mount	*mp)
  {
  	percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount);
  	percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree);
  	percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks);
  }
  
  static void
  xfs_destroy_percpu_counters(
  	struct xfs_mount	*mp)
  {
  	percpu_counter_destroy(&mp->m_icount);
  	percpu_counter_destroy(&mp->m_ifree);
  	percpu_counter_destroy(&mp->m_fdblocks);
  	ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
  	       percpu_counter_sum(&mp->m_delalloc_blks) == 0);
  	percpu_counter_destroy(&mp->m_delalloc_blks);
  }
  
  static void
  xfs_fs_put_super(
  	struct super_block	*sb)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	/* if ->fill_super failed, we have no mount to tear down */
  	if (!sb->s_fs_info)
  		return;
  
  	xfs_notice(mp, "Unmounting Filesystem");
  	xfs_filestream_unmount(mp);
  	xfs_unmountfs(mp);
  
  	xfs_freesb(mp);
  	free_percpu(mp->m_stats.xs_stats);
  	xfs_destroy_percpu_counters(mp);
  	xfs_destroy_mount_workqueues(mp);
  	xfs_close_devices(mp);
  
  	sb->s_fs_info = NULL;
  	xfs_mount_free(mp);
  }
  
  static long
  xfs_fs_nr_cached_objects(
  	struct super_block	*sb,
  	struct shrink_control	*sc)
  {
  	/* Paranoia: catch incorrect calls during mount setup or teardown */
  	if (WARN_ON_ONCE(!sb->s_fs_info))
  		return 0;
  	return xfs_reclaim_inodes_count(XFS_M(sb));
  }
  
  static long
  xfs_fs_free_cached_objects(
  	struct super_block	*sb,
  	struct shrink_control	*sc)

  {

  	return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan);
  }

  static const struct super_operations xfs_super_operations = {
  	.alloc_inode		= xfs_fs_alloc_inode,
  	.destroy_inode		= xfs_fs_destroy_inode,
  	.dirty_inode		= xfs_fs_dirty_inode,
  	.drop_inode		= xfs_fs_drop_inode,
  	.put_super		= xfs_fs_put_super,
  	.sync_fs		= xfs_fs_sync_fs,
  	.freeze_fs		= xfs_fs_freeze,
  	.unfreeze_fs		= xfs_fs_unfreeze,
  	.statfs			= xfs_fs_statfs,
  	.show_options		= xfs_fs_show_options,
  	.nr_cached_objects	= xfs_fs_nr_cached_objects,
  	.free_cached_objects	= xfs_fs_free_cached_objects,
  };

  static int
  suffix_kstrtoint(
  	const char	*s,
  	unsigned int	base,
  	int		*res)
  {
  	int		last, shift_left_factor = 0, _res;
  	char		*value;
  	int		ret = 0;
  
  	value = kstrdup(s, GFP_KERNEL);
  	if (!value)
  		return -ENOMEM;
  
  	last = strlen(value) - 1;
  	if (value[last] == 'K' || value[last] == 'k') {
  		shift_left_factor = 10;
  		value[last] = '\0';
  	}
  	if (value[last] == 'M' || value[last] == 'm') {
  		shift_left_factor = 20;
  		value[last] = '\0';
  	}
  	if (value[last] == 'G' || value[last] == 'g') {
  		shift_left_factor = 30;
  		value[last] = '\0';
  	}
  
  	if (kstrtoint(value, base, &_res))
  		ret = -EINVAL;
  	kfree(value);
  	*res = _res << shift_left_factor;
  	return ret;

  }

  /*

   * Set mount state from a mount option.
   *
   * NOTE: mp->m_super is NULL here!

   */

  static int
  xfs_fc_parse_param(
  	struct fs_context	*fc,
  	struct fs_parameter	*param)

  {

  	struct xfs_mount	*mp = fc->s_fs_info;
  	struct fs_parse_result	result;
  	int			size = 0;
  	int			opt;

  	opt = fs_parse(fc, xfs_fs_parameters, param, &result);

  	if (opt < 0)
  		return opt;

  	switch (opt) {
  	case Opt_logbufs:
  		mp->m_logbufs = result.uint_32;
  		return 0;
  	case Opt_logbsize:
  		if (suffix_kstrtoint(param->string, 10, &mp->m_logbsize))
  			return -EINVAL;
  		return 0;
  	case Opt_logdev:
  		kfree(mp->m_logname);
  		mp->m_logname = kstrdup(param->string, GFP_KERNEL);
  		if (!mp->m_logname)
  			return -ENOMEM;
  		return 0;
  	case Opt_rtdev:
  		kfree(mp->m_rtname);
  		mp->m_rtname = kstrdup(param->string, GFP_KERNEL);
  		if (!mp->m_rtname)
  			return -ENOMEM;
  		return 0;
  	case Opt_allocsize:
  		if (suffix_kstrtoint(param->string, 10, &size))
  			return -EINVAL;
  		mp->m_allocsize_log = ffs(size) - 1;
  		mp->m_flags |= XFS_MOUNT_ALLOCSIZE;
  		return 0;
  	case Opt_grpid:
  	case Opt_bsdgroups:
  		mp->m_flags |= XFS_MOUNT_GRPID;
  		return 0;
  	case Opt_nogrpid:
  	case Opt_sysvgroups:
  		mp->m_flags &= ~XFS_MOUNT_GRPID;
  		return 0;
  	case Opt_wsync:
  		mp->m_flags |= XFS_MOUNT_WSYNC;
  		return 0;
  	case Opt_norecovery:
  		mp->m_flags |= XFS_MOUNT_NORECOVERY;
  		return 0;
  	case Opt_noalign:
  		mp->m_flags |= XFS_MOUNT_NOALIGN;
  		return 0;
  	case Opt_swalloc:
  		mp->m_flags |= XFS_MOUNT_SWALLOC;
  		return 0;
  	case Opt_sunit:
  		mp->m_dalign = result.uint_32;
  		return 0;
  	case Opt_swidth:
  		mp->m_swidth = result.uint_32;
  		return 0;
  	case Opt_inode32:
  		mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
  		return 0;
  	case Opt_inode64:
  		mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
  		return 0;
  	case Opt_nouuid:
  		mp->m_flags |= XFS_MOUNT_NOUUID;
  		return 0;

  	case Opt_largeio:
  		mp->m_flags |= XFS_MOUNT_LARGEIO;
  		return 0;
  	case Opt_nolargeio:
  		mp->m_flags &= ~XFS_MOUNT_LARGEIO;
  		return 0;

  	case Opt_filestreams:
  		mp->m_flags |= XFS_MOUNT_FILESTREAMS;
  		return 0;
  	case Opt_noquota:
  		mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
  		mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
  		mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
  		return 0;
  	case Opt_quota:
  	case Opt_uquota:
  	case Opt_usrquota:
  		mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
  				 XFS_UQUOTA_ENFD);
  		return 0;
  	case Opt_qnoenforce:
  	case Opt_uqnoenforce:
  		mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
  		mp->m_qflags &= ~XFS_UQUOTA_ENFD;
  		return 0;
  	case Opt_pquota:
  	case Opt_prjquota:
  		mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
  				 XFS_PQUOTA_ENFD);
  		return 0;
  	case Opt_pqnoenforce:
  		mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
  		mp->m_qflags &= ~XFS_PQUOTA_ENFD;
  		return 0;
  	case Opt_gquota:
  	case Opt_grpquota:
  		mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
  				 XFS_GQUOTA_ENFD);
  		return 0;
  	case Opt_gqnoenforce:
  		mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
  		mp->m_qflags &= ~XFS_GQUOTA_ENFD;
  		return 0;
  	case Opt_discard:
  		mp->m_flags |= XFS_MOUNT_DISCARD;
  		return 0;
  	case Opt_nodiscard:
  		mp->m_flags &= ~XFS_MOUNT_DISCARD;
  		return 0;
  #ifdef CONFIG_FS_DAX
  	case Opt_dax:

  		xfs_mount_set_dax_mode(mp, XFS_DAX_ALWAYS);
  		return 0;
  	case Opt_dax_enum:
  		xfs_mount_set_dax_mode(mp, result.uint_32);

  		return 0;
  #endif

  	/* Following mount options will be removed in September 2025 */
  	case Opt_ikeep:
  		xfs_warn(mp, "%s mount option is deprecated.", param->key);
  		mp->m_flags |= XFS_MOUNT_IKEEP;
  		return 0;
  	case Opt_noikeep:
  		xfs_warn(mp, "%s mount option is deprecated.", param->key);
  		mp->m_flags &= ~XFS_MOUNT_IKEEP;
  		return 0;
  	case Opt_attr2:
  		xfs_warn(mp, "%s mount option is deprecated.", param->key);
  		mp->m_flags |= XFS_MOUNT_ATTR2;
  		return 0;
  	case Opt_noattr2:
  		xfs_warn(mp, "%s mount option is deprecated.", param->key);
  		mp->m_flags &= ~XFS_MOUNT_ATTR2;
  		mp->m_flags |= XFS_MOUNT_NOATTR2;
  		return 0;

  	default:
  		xfs_warn(mp, "unknown mount option [%s].", param->key);
  		return -EINVAL;
  	}

  	return 0;
  }

  static int
  xfs_fc_validate_params(

  	struct xfs_mount	*mp)
  {

  	/*

  	 * no recovery flag requires a read-only mount

  	 */

  	if ((mp->m_flags & XFS_MOUNT_NORECOVERY) &&
  	    !(mp->m_flags & XFS_MOUNT_RDONLY)) {
  		xfs_warn(mp, "no-recovery mounts must be read-only.");

  		return -EINVAL;

  	}

  	if ((mp->m_flags & XFS_MOUNT_NOALIGN) &&
  	    (mp->m_dalign || mp->m_swidth)) {

  		xfs_warn(mp,

  	"sunit and swidth options incompatible with the noalign option");
  		return -EINVAL;

  	}

  	if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) {
  		xfs_warn(mp, "quota support not available in this kernel.");

  		return -EINVAL;

  	}

  	if ((mp->m_dalign && !mp->m_swidth) ||
  	    (!mp->m_dalign && mp->m_swidth)) {
  		xfs_warn(mp, "sunit and swidth must be specified together");
  		return -EINVAL;
  	}

  	if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) {
  		xfs_warn(mp,
  	"stripe width (%d) must be a multiple of the stripe unit (%d)",
  			mp->m_swidth, mp->m_dalign);
  		return -EINVAL;
  	}

  	if (mp->m_logbufs != -1 &&
  	    mp->m_logbufs != 0 &&
  	    (mp->m_logbufs < XLOG_MIN_ICLOGS ||
  	     mp->m_logbufs > XLOG_MAX_ICLOGS)) {
  		xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]",
  			mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS);
  		return -EINVAL;
  	}

  	if (mp->m_logbsize != -1 &&
  	    mp->m_logbsize !=  0 &&
  	    (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE ||
  	     mp->m_logbsize > XLOG_MAX_RECORD_BSIZE ||
  	     !is_power_of_2(mp->m_logbsize))) {
  		xfs_warn(mp,
  			"invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]",
  			mp->m_logbsize);
  		return -EINVAL;
  	}

  	if ((mp->m_flags & XFS_MOUNT_ALLOCSIZE) &&
  	    (mp->m_allocsize_log > XFS_MAX_IO_LOG ||
  	     mp->m_allocsize_log < XFS_MIN_IO_LOG)) {
  		xfs_warn(mp, "invalid log iosize: %d [not %d-%d]",
  			mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG);
  		return -EINVAL;
  	}

  	return 0;

  }

  static int
  xfs_fc_fill_super(

  	struct super_block	*sb,

  	struct fs_context	*fc)

  {

  	struct xfs_mount	*mp = sb->s_fs_info;

  	struct inode		*root;

  	int			flags = 0, error;

  	mp->m_super = sb;

  	error = xfs_fc_validate_params(mp);

  	if (error)

  		goto out_free_names;

  
  	sb_min_blocksize(sb, BBSIZE);

  	sb->s_xattr = xfs_xattr_handlers;

  	sb->s_export_op = &xfs_export_operations;

  #ifdef CONFIG_XFS_QUOTA

  	sb->s_qcop = &xfs_quotactl_operations;

  	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;

  #endif

  	sb->s_op = &xfs_super_operations;

  	/*
  	 * Delay mount work if the debug hook is set. This is debug
  	 * instrumention to coordinate simulation of xfs mount failures with
  	 * VFS superblock operations
  	 */
  	if (xfs_globals.mount_delay) {
  		xfs_notice(mp, "Delaying mount for %d seconds.",
  			xfs_globals.mount_delay);
  		msleep(xfs_globals.mount_delay * 1000);
  	}

  	if (fc->sb_flags & SB_SILENT)

  		flags |= XFS_MFSI_QUIET;

  	error = xfs_open_devices(mp);

  	if (error)

  		goto out_free_names;

  	error = xfs_init_mount_workqueues(mp);

  	if (error)
  		goto out_close_devices;

  	error = xfs_init_percpu_counters(mp);

  	if (error)
  		goto out_destroy_workqueues;

  	/* Allocate stats memory before we do operations that might use it */
  	mp->m_stats.xs_stats = alloc_percpu(struct xfsstats);
  	if (!mp->m_stats.xs_stats) {

  		error = -ENOMEM;

  		goto out_destroy_counters;
  	}

  	error = xfs_readsb(mp, flags);
  	if (error)

  		goto out_free_stats;

  
  	error = xfs_finish_flags(mp);

  	if (error)

  		goto out_free_sb;

  	error = xfs_setup_devices(mp);

  	if (error)

  		goto out_free_sb;

  	/* V4 support is undergoing deprecation. */
  	if (!xfs_sb_version_hascrc(&mp->m_sb)) {
  #ifdef CONFIG_XFS_SUPPORT_V4
  		xfs_warn_once(mp,
  	"Deprecated V4 format (crc=0) will not be supported after September 2030.");
  #else
  		xfs_warn(mp,
  	"Deprecated V4 format (crc=0) not supported by kernel.");
  		error = -EINVAL;
  		goto out_free_sb;
  #endif
  	}

  	/*
  	 * XFS block mappings use 54 bits to store the logical block offset.
  	 * This should suffice to handle the maximum file size that the VFS
  	 * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT
  	 * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes
  	 * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON
  	 * to check this assertion.
  	 *
  	 * Avoid integer overflow by comparing the maximum bmbt offset to the
  	 * maximum pagecache offset in units of fs blocks.
  	 */
  	if (XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE) > XFS_MAX_FILEOFF) {
  		xfs_warn(mp,
  "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!",
  			 XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE),
  			 XFS_MAX_FILEOFF);
  		error = -EINVAL;
  		goto out_free_sb;
  	}

  	error = xfs_filestream_mount(mp);
  	if (error)

  		goto out_free_sb;

  	/*
  	 * we must configure the block size in the superblock before we run the
  	 * full mount process as the mount process can lookup and cache inodes.

  	 */

  	sb->s_magic = XFS_SUPER_MAGIC;

  	sb->s_blocksize = mp->m_sb.sb_blocksize;
  	sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1;

  	sb->s_maxbytes = MAX_LFS_FILESIZE;

  	sb->s_max_links = XFS_MAXLINK;

  	sb->s_time_gran = 1;

  	if (xfs_sb_version_hasbigtime(&mp->m_sb)) {
  		sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN);
  		sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX);
  	} else {
  		sb->s_time_min = XFS_LEGACY_TIME_MIN;
  		sb->s_time_max = XFS_LEGACY_TIME_MAX;
  	}

  	trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max);

  	sb->s_iflags |= SB_I_CGROUPWB;

  	set_posix_acl_flag(sb);

  	/* version 5 superblocks support inode version counters. */
  	if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)

  		sb->s_flags |= SB_I_VERSION;

  	if (xfs_sb_version_hasbigtime(&mp->m_sb))
  		xfs_warn(mp,
   "EXPERIMENTAL big timestamp feature in use. Use at your own risk!");

  	if (mp->m_flags & XFS_MOUNT_DAX_ALWAYS) {

  		bool rtdev_is_dax = false, datadev_is_dax;

  		xfs_warn(mp,

  		"DAX enabled. Warning: EXPERIMENTAL, use at your own risk");

  		datadev_is_dax = bdev_dax_supported(mp->m_ddev_targp->bt_bdev,
  			sb->s_blocksize);

  		if (mp->m_rtdev_targp)

  			rtdev_is_dax = bdev_dax_supported(
  				mp->m_rtdev_targp->bt_bdev, sb->s_blocksize);
  		if (!rtdev_is_dax && !datadev_is_dax) {

  			xfs_alert(mp,

  			"DAX unsupported by block device. Turning off DAX.");

  			xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER);

  		}

  		if (xfs_sb_version_hasreflink(&mp->m_sb)) {

  			xfs_alert(mp,

  		"DAX and reflink cannot be used together!");

  			error = -EINVAL;
  			goto out_filestream_unmount;
  		}

  	}

  	if (mp->m_flags & XFS_MOUNT_DISCARD) {
  		struct request_queue *q = bdev_get_queue(sb->s_bdev);
  
  		if (!blk_queue_discard(q)) {
  			xfs_warn(mp, "mounting with \"discard\" option, but "
  					"the device does not support discard");
  			mp->m_flags &= ~XFS_MOUNT_DISCARD;
  		}
  	}

  	if (xfs_sb_version_hasreflink(&mp->m_sb)) {
  		if (mp->m_sb.sb_rblocks) {
  			xfs_alert(mp,

  	"reflink not compatible with realtime device!");

  			error = -EINVAL;
  			goto out_filestream_unmount;
  		}
  
  		if (xfs_globals.always_cow) {
  			xfs_info(mp, "using DEBUG-only always_cow mode.");
  			mp->m_always_cow = true;
  		}

  	}

  	if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {

  		xfs_alert(mp,

  	"reverse mapping btree not compatible with realtime device!");
  		error = -EINVAL;
  		goto out_filestream_unmount;

  	}

  	if (xfs_sb_version_hasinobtcounts(&mp->m_sb))
  		xfs_warn(mp,
   "EXPERIMENTAL inode btree counters feature in use. Use at your own risk!");

  	error = xfs_mountfs(mp);

  	if (error)

  		goto out_filestream_unmount;

  	root = igrab(VFS_I(mp->m_rootip));

  	if (!root) {

  		error = -ENOENT;

  		goto out_unmount;

  	}

  	sb->s_root = d_make_root(root);

  	if (!sb->s_root) {

  		error = -ENOMEM;

  		goto out_unmount;

  	}

  	return 0;

   out_filestream_unmount:

  	xfs_filestream_unmount(mp);

   out_free_sb:
  	xfs_freesb(mp);

   out_free_stats:
  	free_percpu(mp->m_stats.xs_stats);

   out_destroy_counters:

  	xfs_destroy_percpu_counters(mp);

   out_destroy_workqueues:

  	xfs_destroy_mount_workqueues(mp);

   out_close_devices:

  	xfs_close_devices(mp);

   out_free_names:

  	sb->s_fs_info = NULL;

  	xfs_mount_free(mp);

  	return error;

   out_unmount:

  	xfs_filestream_unmount(mp);

  	xfs_unmountfs(mp);

  	goto out_free_sb;

  }

  static int
  xfs_fc_get_tree(
  	struct fs_context	*fc)
  {
  	return get_tree_bdev(fc, xfs_fc_fill_super);
  }

  static int
  xfs_remount_rw(
  	struct xfs_mount	*mp)
  {
  	struct xfs_sb		*sbp = &mp->m_sb;
  	int error;
  
  	if (mp->m_flags & XFS_MOUNT_NORECOVERY) {
  		xfs_warn(mp,
  			"ro->rw transition prohibited on norecovery mount");
  		return -EINVAL;
  	}
  
  	if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
  	    xfs_sb_has_ro_compat_feature(sbp, XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) {
  		xfs_warn(mp,
  	"ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem",
  			(sbp->sb_features_ro_compat &
  				XFS_SB_FEAT_RO_COMPAT_UNKNOWN));
  		return -EINVAL;
  	}
  
  	mp->m_flags &= ~XFS_MOUNT_RDONLY;
  
  	/*
  	 * If this is the first remount to writeable state we might have some
  	 * superblock changes to update.
  	 */
  	if (mp->m_update_sb) {
  		error = xfs_sync_sb(mp, false);
  		if (error) {
  			xfs_warn(mp, "failed to write sb changes");
  			return error;
  		}
  		mp->m_update_sb = false;
  	}
  
  	/*
  	 * Fill out the reserve pool if it is empty. Use the stashed value if
  	 * it is non-zero, otherwise go with the default.
  	 */
  	xfs_restore_resvblks(mp);
  	xfs_log_work_queue(mp);
  
  	/* Recover any CoW blocks that never got remapped. */
  	error = xfs_reflink_recover_cow(mp);
  	if (error) {
  		xfs_err(mp,
  			"Error %d recovering leftover CoW allocations.", error);

  		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);

  		return error;
  	}
  	xfs_start_block_reaping(mp);
  
  	/* Create the per-AG metadata reservation pool .*/
  	error = xfs_fs_reserve_ag_blocks(mp);
  	if (error && error != -ENOSPC)
  		return error;
  
  	return 0;
  }
  
  static int
  xfs_remount_ro(
  	struct xfs_mount	*mp)
  {
  	int error;
  
  	/*
  	 * Cancel background eofb scanning so it cannot race with the final
  	 * log force+buftarg wait and deadlock the remount.
  	 */
  	xfs_stop_block_reaping(mp);
  
  	/* Get rid of any leftover CoW reservations... */
  	error = xfs_icache_free_cowblocks(mp, NULL);
  	if (error) {
  		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
  		return error;
  	}
  
  	/* Free the per-AG metadata reservation pool. */
  	error = xfs_fs_unreserve_ag_blocks(mp);
  	if (error) {
  		xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
  		return error;
  	}
  
  	/*
  	 * Before we sync the metadata, we need to free up the reserve block
  	 * pool so that the used block count in the superblock on disk is
  	 * correct at the end of the remount. Stash the current* reserve pool
  	 * size so that if we get remounted rw, we can return it to the same
  	 * size.
  	 */
  	xfs_save_resvblks(mp);
  
  	xfs_quiesce_attr(mp);
  	mp->m_flags |= XFS_MOUNT_RDONLY;
  
  	return 0;
  }
  
  /*
   * Logically we would return an error here to prevent users from believing
   * they might have changed mount options using remount which can't be changed.
   *
   * But unfortunately mount(8) adds all options from mtab and fstab to the mount
   * arguments in some cases so we can't blindly reject options, but have to
   * check for each specified option if it actually differs from the currently
   * set option and only reject it if that's the case.
   *
   * Until that is implemented we return success for every remount request, and
   * silently ignore all options that we can't actually change.
   */
  static int
  xfs_fc_reconfigure(
  	struct fs_context *fc)
  {
  	struct xfs_mount	*mp = XFS_M(fc->root->d_sb);
  	struct xfs_mount        *new_mp = fc->s_fs_info;
  	xfs_sb_t		*sbp = &mp->m_sb;
  	int			flags = fc->sb_flags;
  	int			error;

  	/* version 5 superblocks always support version counters. */
  	if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5)
  		fc->sb_flags |= SB_I_VERSION;

  	error = xfs_fc_validate_params(new_mp);
  	if (error)
  		return error;
  
  	sync_filesystem(mp->m_super);
  
  	/* inode32 -> inode64 */
  	if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
  	    !(new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
  		mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS;
  		mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
  	}
  
  	/* inode64 -> inode32 */
  	if (!(mp->m_flags & XFS_MOUNT_SMALL_INUMS) &&
  	    (new_mp->m_flags & XFS_MOUNT_SMALL_INUMS)) {
  		mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
  		mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount);
  	}
  
  	/* ro -> rw */
  	if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(flags & SB_RDONLY)) {
  		error = xfs_remount_rw(mp);
  		if (error)
  			return error;
  	}
  
  	/* rw -> ro */
  	if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (flags & SB_RDONLY)) {
  		error = xfs_remount_ro(mp);
  		if (error)
  			return error;
  	}
  
  	return 0;
  }

  static void xfs_fc_free(
  	struct fs_context	*fc)
  {
  	struct xfs_mount	*mp = fc->s_fs_info;
  
  	/*
  	 * mp is stored in the fs_context when it is initialized.
  	 * mp is transferred to the superblock on a successful mount,
  	 * but if an error occurs before the transfer we have to free
  	 * it here.
  	 */
  	if (mp)
  		xfs_mount_free(mp);
  }
  
  static const struct fs_context_operations xfs_context_ops = {
  	.parse_param = xfs_fc_parse_param,
  	.get_tree    = xfs_fc_get_tree,
  	.reconfigure = xfs_fc_reconfigure,
  	.free        = xfs_fc_free,
  };
  
  static int xfs_init_fs_context(
  	struct fs_context	*fc)
  {
  	struct xfs_mount	*mp;

  	mp = kmem_alloc(sizeof(struct xfs_mount), KM_ZERO);

  	if (!mp)
  		return -ENOMEM;

  	spin_lock_init(&mp->m_sb_lock);
  	spin_lock_init(&mp->m_agirotor_lock);
  	INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC);
  	spin_lock_init(&mp->m_perag_lock);
  	mutex_init(&mp->m_growlock);

  	INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker);

  	INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker);
  	INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
  	INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
  	mp->m_kobj.kobject.kset = xfs_kset;
  	/*
  	 * We don't create the finobt per-ag space reservation until after log
  	 * recovery, so we must set this to true so that an ifree transaction
  	 * started during log recovery will not depend on space reservations
  	 * for finobt expansion.
  	 */
  	mp->m_finobt_nores = true;

  	/*
  	 * These can be overridden by the mount option parsing.
  	 */
  	mp->m_logbufs = -1;
  	mp->m_logbsize = -1;
  	mp->m_allocsize_log = 16; /* 64k */
  
  	/*
  	 * Copy binary VFS mount flags we are interested in.
  	 */
  	if (fc->sb_flags & SB_RDONLY)
  		mp->m_flags |= XFS_MOUNT_RDONLY;
  	if (fc->sb_flags & SB_DIRSYNC)
  		mp->m_flags |= XFS_MOUNT_DIRSYNC;
  	if (fc->sb_flags & SB_SYNCHRONOUS)
  		mp->m_flags |= XFS_MOUNT_WSYNC;
  
  	fc->s_fs_info = mp;
  	fc->ops = &xfs_context_ops;
  
  	return 0;
  }

  static struct file_system_type xfs_fs_type = {

  	.owner			= THIS_MODULE,
  	.name			= "xfs",

  	.init_fs_context	= xfs_init_fs_context,

  	.parameters		= xfs_fs_parameters,

  	.kill_sb		= kill_block_super,
  	.fs_flags		= FS_REQUIRES_DEV,
  };

  MODULE_ALIAS_FS("xfs");

  STATIC int __init

  xfs_init_zones(void)
  {

  	xfs_log_ticket_zone = kmem_cache_create("xfs_log_ticket",
  						sizeof(struct xlog_ticket),
  						0, 0, NULL);

  	if (!xfs_log_ticket_zone)

  		goto out;

  	xfs_bmap_free_item_zone = kmem_cache_create("xfs_bmap_free_item",
  					sizeof(struct xfs_extent_free_item),
  					0, 0, NULL);

  	if (!xfs_bmap_free_item_zone)
  		goto out_destroy_log_ticket_zone;

  	xfs_btree_cur_zone = kmem_cache_create("xfs_btree_cur",
  					       sizeof(struct xfs_btree_cur),
  					       0, 0, NULL);

  	if (!xfs_btree_cur_zone)
  		goto out_destroy_bmap_free_item_zone;

  	xfs_da_state_zone = kmem_cache_create("xfs_da_state",
  					      sizeof(struct xfs_da_state),
  					      0, 0, NULL);

  	if (!xfs_da_state_zone)
  		goto out_destroy_btree_cur_zone;

  	xfs_ifork_zone = kmem_cache_create("xfs_ifork",
  					   sizeof(struct xfs_ifork),
  					   0, 0, NULL);

  	if (!xfs_ifork_zone)

  		goto out_destroy_da_state_zone;

  	xfs_trans_zone = kmem_cache_create("xf_trans",
  					   sizeof(struct xfs_trans),
  					   0, 0, NULL);

  	if (!xfs_trans_zone)
  		goto out_destroy_ifork_zone;

  	/*
  	 * The size of the zone allocated buf log item is the maximum
  	 * size possible under XFS.  This wastes a little bit of memory,
  	 * but it is much faster.
  	 */

  	xfs_buf_item_zone = kmem_cache_create("xfs_buf_item",
  					      sizeof(struct xfs_buf_log_item),
  					      0, 0, NULL);

  	if (!xfs_buf_item_zone)

  		goto out_destroy_trans_zone;

  	xfs_efd_zone = kmem_cache_create("xfs_efd_item",
  					(sizeof(struct xfs_efd_log_item) +
  					(XFS_EFD_MAX_FAST_EXTENTS - 1) *
  					sizeof(struct xfs_extent)),
  					0, 0, NULL);

  	if (!xfs_efd_zone)
  		goto out_destroy_buf_item_zone;

  	xfs_efi_zone = kmem_cache_create("xfs_efi_item",
  					 (sizeof(struct xfs_efi_log_item) +
  					 (XFS_EFI_MAX_FAST_EXTENTS - 1) *
  					 sizeof(struct xfs_extent)),
  					 0, 0, NULL);

  	if (!xfs_efi_zone)
  		goto out_destroy_efd_zone;

  	xfs_inode_zone = kmem_cache_create("xfs_inode",
  					   sizeof(struct xfs_inode), 0,
  					   (SLAB_HWCACHE_ALIGN |
  					    SLAB_RECLAIM_ACCOUNT |
  					    SLAB_MEM_SPREAD | SLAB_ACCOUNT),
  					   xfs_fs_inode_init_once);

  	if (!xfs_inode_zone)
  		goto out_destroy_efi_zone;

  	xfs_ili_zone = kmem_cache_create("xfs_ili",
  					 sizeof(struct xfs_inode_log_item), 0,

  					 SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
  					 NULL);

  	if (!xfs_ili_zone)
  		goto out_destroy_inode_zone;

  
  	xfs_icreate_zone = kmem_cache_create("xfs_icr",
  					     sizeof(struct xfs_icreate_item),
  					     0, 0, NULL);

  	if (!xfs_icreate_zone)
  		goto out_destroy_ili_zone;

  	xfs_rud_zone = kmem_cache_create("xfs_rud_item",
  					 sizeof(struct xfs_rud_log_item),
  					 0, 0, NULL);

  	if (!xfs_rud_zone)
  		goto out_destroy_icreate_zone;

  	xfs_rui_zone = kmem_cache_create("xfs_rui_item",

  			xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS),

  			0, 0, NULL);

  	if (!xfs_rui_zone)
  		goto out_destroy_rud_zone;

  	xfs_cud_zone = kmem_cache_create("xfs_cud_item",
  					 sizeof(struct xfs_cud_log_item),
  					 0, 0, NULL);

  	if (!xfs_cud_zone)
  		goto out_destroy_rui_zone;

  	xfs_cui_zone = kmem_cache_create("xfs_cui_item",

  			xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS),

  			0, 0, NULL);

  	if (!xfs_cui_zone)
  		goto out_destroy_cud_zone;

  	xfs_bud_zone = kmem_cache_create("xfs_bud_item",
  					 sizeof(struct xfs_bud_log_item),
  					 0, 0, NULL);

  	if (!xfs_bud_zone)
  		goto out_destroy_cui_zone;

  	xfs_bui_zone = kmem_cache_create("xfs_bui_item",

  			xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS),

  			0, 0, NULL);

  	if (!xfs_bui_zone)
  		goto out_destroy_bud_zone;

  	return 0;

   out_destroy_bud_zone:

  	kmem_cache_destroy(xfs_bud_zone);

   out_destroy_cui_zone:

  	kmem_cache_destroy(xfs_cui_zone);

   out_destroy_cud_zone:

  	kmem_cache_destroy(xfs_cud_zone);

   out_destroy_rui_zone:

  	kmem_cache_destroy(xfs_rui_zone);

   out_destroy_rud_zone:

  	kmem_cache_destroy(xfs_rud_zone);

   out_destroy_icreate_zone:

  	kmem_cache_destroy(xfs_icreate_zone);

   out_destroy_ili_zone:

  	kmem_cache_destroy(xfs_ili_zone);

   out_destroy_inode_zone:

  	kmem_cache_destroy(xfs_inode_zone);

   out_destroy_efi_zone: