fs/freevxfs/vxfs_inode.c - kernel/lockdown - Git at Google

 /*
  * Copyright (c) 2000-2001 Christoph Hellwig.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions, and the following disclaimer,
  *    without modification.
  * 2. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL").
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */

 /*
  * Veritas filesystem driver - inode routines.
  */
 #include <linux/fs.h>
 #include <linux/buffer_head.h>
 #include <linux/pagemap.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>

 #include "vxfs.h"
 #include "vxfs_inode.h"
 #include "vxfs_extern.h"


 struct kmem_cache		*vxfs_inode_cachep;


 #ifdef DIAGNOSTIC
 /*
  * Dump inode contents (partially).
  */
 void
 vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
 {
 	printk(KERN_DEBUG "\n\n");
 	if (ino)
 		printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
 	else
 		printk(KERN_DEBUG "dumping unknown vxfs inode\n");

 	printk(KERN_DEBUG "---------------------------\n");
 	printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
 	printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
 			vip->vii_nlink, vip->vii_uid, vip->vii_gid);
 	printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
 			vip->vii_size, vip->vii_blocks);
 	printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
 }
 #endif


 /**
  * vxfs_blkiget - find inode based on extent #
  * @sbp:	superblock of the filesystem we search in
  * @extent:	number of the extent to search
  * @ino:	inode number to search
  *
  * Description:
  *  vxfs_blkiget searches inode @ino in the filesystem described by
  *  @sbp in the extent @extent.
  *  Returns the matching VxFS inode on success, else a NULL pointer.
  *
  * NOTE:
  *  While __vxfs_iget uses the pagecache vxfs_blkiget uses the
  *  buffercache.  This function should not be used outside the
  *  read_super() method, otherwise the data may be incoherent.
  */
 struct vxfs_inode_info *
 vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
 {
 	struct buffer_head		*bp;
 	u_long				block, offset;

 	block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
 	offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
 	bp = sb_bread(sbp, block);

 	if (bp && buffer_mapped(bp)) {
 		struct vxfs_inode_info	*vip;
 		struct vxfs_dinode	*dip;

 		if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
 			goto fail;
 		dip = (struct vxfs_dinode *)(bp->b_data + offset);
 		memcpy(vip, dip, sizeof(*vip));
 #ifdef DIAGNOSTIC
 		vxfs_dumpi(vip, ino);
 #endif
 		brelse(bp);
 		return (vip);
 	}

 fail:
 	printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
 	brelse(bp);
 	return NULL;
 }

 /**
  * __vxfs_iget - generic find inode facility
  * @sbp:		VFS superblock
  * @ino:		inode number
  * @ilistp:		inode list
  *
  * Description:
  *  Search the for inode number @ino in the filesystem
  *  described by @sbp.  Use the specified inode table (@ilistp).
  *  Returns the matching VxFS inode on success, else an error code.
  */
 static struct vxfs_inode_info *
 __vxfs_iget(ino_t ino, struct inode *ilistp)
 {
 	struct page			*pp;
 	u_long				offset;

 	offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
 	pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);

 	if (!IS_ERR(pp)) {
 		struct vxfs_inode_info	*vip;
 		struct vxfs_dinode	*dip;
 		caddr_t			kaddr = (char *)page_address(pp);

 		if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
 			goto fail;
 		dip = (struct vxfs_dinode *)(kaddr + offset);
 		memcpy(vip, dip, sizeof(*vip));
 #ifdef DIAGNOSTIC
 		vxfs_dumpi(vip, ino);
 #endif
 		vxfs_put_page(pp);
 		return (vip);
 	}

 	printk(KERN_WARNING "vxfs: error on page %p\n", pp);
 	return ERR_CAST(pp);

 fail:
 	printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
 	vxfs_put_page(pp);
 	return ERR_PTR(-ENOMEM);
 }

 /**
  * vxfs_stiget - find inode using the structural inode list
  * @sbp:	VFS superblock
  * @ino:	inode #
  *
  * Description:
  *  Find inode @ino in the filesystem described by @sbp using
  *  the structural inode list.
  *  Returns the matching VxFS inode on success, else a NULL pointer.
  */
 struct vxfs_inode_info *
 vxfs_stiget(struct super_block *sbp, ino_t ino)
 {
 	struct vxfs_inode_info *vip;

 	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
 	return IS_ERR(vip) ? NULL : vip;
 }

 /**
  * vxfs_transmod - mode for a VxFS inode
  * @vip:	VxFS inode
  *
  * Description:
  *  vxfs_transmod returns a Linux mode_t for a given
  *  VxFS inode structure.
  */
 static __inline__ umode_t
 vxfs_transmod(struct vxfs_inode_info *vip)
 {
 	umode_t			ret = vip->vii_mode & ~VXFS_TYPE_MASK;

 	if (VXFS_ISFIFO(vip))
 		ret |= S_IFIFO;
 	if (VXFS_ISCHR(vip))
 		ret |= S_IFCHR;
 	if (VXFS_ISDIR(vip))
 		ret |= S_IFDIR;
 	if (VXFS_ISBLK(vip))
 		ret |= S_IFBLK;
 	if (VXFS_ISLNK(vip))
 		ret |= S_IFLNK;
 	if (VXFS_ISREG(vip))
 		ret |= S_IFREG;
 	if (VXFS_ISSOC(vip))
 		ret |= S_IFSOCK;

 	return (ret);
 }

 /**
  * vxfs_iinit- helper to fill inode fields
  * @ip:		VFS inode
  * @vip:	VxFS inode
  *
  * Description:
  *  vxfs_instino is a helper function to fill in all relevant
  *  fields in @ip from @vip.
  */
 static void
 vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip)
 {

 	ip->i_mode = vxfs_transmod(vip);
 	i_uid_write(ip, (uid_t)vip->vii_uid);
 	i_gid_write(ip, (gid_t)vip->vii_gid);

 	set_nlink(ip, vip->vii_nlink);
 	ip->i_size = vip->vii_size;

 	ip->i_atime.tv_sec = vip->vii_atime;
 	ip->i_ctime.tv_sec = vip->vii_ctime;
 	ip->i_mtime.tv_sec = vip->vii_mtime;
 	ip->i_atime.tv_nsec = 0;
 	ip->i_ctime.tv_nsec = 0;
 	ip->i_mtime.tv_nsec = 0;

 	ip->i_blocks = vip->vii_blocks;
 	ip->i_generation = vip->vii_gen;

 	ip->i_private = vip;

 }

 /**
  * vxfs_get_fake_inode - get fake inode structure
  * @sbp:		filesystem superblock
  * @vip:		fspriv inode
  *
  * Description:
  *  vxfs_fake_inode gets a fake inode (not in the inode hash) for a
  *  superblock, vxfs_inode pair.
  *  Returns the filled VFS inode.
  */
 struct inode *
 vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
 {
 	struct inode			*ip = NULL;

 	if ((ip = new_inode(sbp))) {
 		ip->i_ino = get_next_ino();
 		vxfs_iinit(ip, vip);
 		ip->i_mapping->a_ops = &vxfs_aops;
 	}
 	return (ip);
 }

 /**
  * vxfs_put_fake_inode - free faked inode
  * *ip:			VFS inode
  *
  * Description:
  *  vxfs_put_fake_inode frees all data associated with @ip.
  */
 void
 vxfs_put_fake_inode(struct inode *ip)
 {
 	iput(ip);
 }

 /**
  * vxfs_iget - get an inode
  * @sbp:	the superblock to get the inode for
  * @ino:	the number of the inode to get
  *
  * Description:
  *  vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
  *  in all relevant fields in the new inode.
  */
 struct inode *
 vxfs_iget(struct super_block *sbp, ino_t ino)
 {
 	struct vxfs_inode_info		*vip;
 	const struct address_space_operations	*aops;
 	struct inode *ip;

 	ip = iget_locked(sbp, ino);
 	if (!ip)
 		return ERR_PTR(-ENOMEM);
 	if (!(ip->i_state & I_NEW))
 		return ip;

 	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
 	if (IS_ERR(vip)) {
 		iget_failed(ip);
 		return ERR_CAST(vip);
 	}

 	vxfs_iinit(ip, vip);

 	if (VXFS_ISIMMED(vip))
 		aops = &vxfs_immed_aops;
 	else
 		aops = &vxfs_aops;

 	if (S_ISREG(ip->i_mode)) {
 		ip->i_fop = &generic_ro_fops;
 		ip->i_mapping->a_ops = aops;
 	} else if (S_ISDIR(ip->i_mode)) {
 		ip->i_op = &vxfs_dir_inode_ops;
 		ip->i_fop = &vxfs_dir_operations;
 		ip->i_mapping->a_ops = aops;
 	} else if (S_ISLNK(ip->i_mode)) {
 		if (!VXFS_ISIMMED(vip)) {
 			ip->i_op = &page_symlink_inode_operations;
 			ip->i_mapping->a_ops = &vxfs_aops;
 		} else {
 			ip->i_op = &vxfs_immed_symlink_iops;
 			vip->vii_immed.vi_immed[ip->i_size] = '\0';
 		}
 	} else
 		init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));

 	unlock_new_inode(ip);
 	return ip;
 }

 static void vxfs_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(vxfs_inode_cachep, inode->i_private);
 }

 /**
  * vxfs_evict_inode - remove inode from main memory
  * @ip:		inode to discard.
  *
  * Description:
  *  vxfs_evict_inode() is called on the final iput and frees the private
  *  inode area.
  */
 void
 vxfs_evict_inode(struct inode *ip)
 {
 	truncate_inode_pages(&ip->i_data, 0);
 	clear_inode(ip);
 	call_rcu(&ip->i_rcu, vxfs_i_callback);
 }
	/*
	* Copyright (c) 2000-2001 Christoph Hellwig.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions, and the following disclaimer,
	* without modification.
	* 2. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL").
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.
	*/

	/*
	* Veritas filesystem driver - inode routines.
	*/
	#include <linux/fs.h>
	#include <linux/buffer_head.h>
	#include <linux/pagemap.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>

	#include "vxfs.h"
	#include "vxfs_inode.h"
	#include "vxfs_extern.h"


	struct kmem_cache *vxfs_inode_cachep;


	#ifdef DIAGNOSTIC
	/*
	* Dump inode contents (partially).
	*/
	void
	vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
	{
	printk(KERN_DEBUG "\n\n");
	if (ino)
	printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
	else
	printk(KERN_DEBUG "dumping unknown vxfs inode\n");

	printk(KERN_DEBUG "---------------------------\n");
	printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
	printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
	vip->vii_nlink, vip->vii_uid, vip->vii_gid);
	printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
	vip->vii_size, vip->vii_blocks);
	printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
	}
	#endif


	/**
	* vxfs_blkiget - find inode based on extent #
	* @sbp: superblock of the filesystem we search in
	* @extent: number of the extent to search
	* @ino: inode number to search
	*
	* Description:
	* vxfs_blkiget searches inode @ino in the filesystem described by
	* @sbp in the extent @extent.
	* Returns the matching VxFS inode on success, else a NULL pointer.
	*
	* NOTE:
	* While __vxfs_iget uses the pagecache vxfs_blkiget uses the
	* buffercache. This function should not be used outside the
	* read_super() method, otherwise the data may be incoherent.
	*/
	struct vxfs_inode_info *
	vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
	{
	struct buffer_head *bp;
	u_long block, offset;

	block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
	offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
	bp = sb_bread(sbp, block);

	if (bp && buffer_mapped(bp)) {
	struct vxfs_inode_info *vip;
	struct vxfs_dinode *dip;

	if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
	goto fail;
	dip = (struct vxfs_dinode *)(bp->b_data + offset);
	memcpy(vip, dip, sizeof(*vip));
	#ifdef DIAGNOSTIC
	vxfs_dumpi(vip, ino);
	#endif
	brelse(bp);
	return (vip);
	}

	fail:
	printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
	brelse(bp);
	return NULL;
	}

	/**
	* __vxfs_iget - generic find inode facility
	* @sbp: VFS superblock
	* @ino: inode number
	* @ilistp: inode list
	*
	* Description:
	* Search the for inode number @ino in the filesystem
	* described by @sbp. Use the specified inode table (@ilistp).
	* Returns the matching VxFS inode on success, else an error code.
	*/
	static struct vxfs_inode_info *
	__vxfs_iget(ino_t ino, struct inode *ilistp)
	{
	struct page *pp;
	u_long offset;

	offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
	pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);

	if (!IS_ERR(pp)) {
	struct vxfs_inode_info *vip;
	struct vxfs_dinode *dip;
	caddr_t kaddr = (char *)page_address(pp);

	if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
	goto fail;
	dip = (struct vxfs_dinode *)(kaddr + offset);
	memcpy(vip, dip, sizeof(*vip));
	#ifdef DIAGNOSTIC
	vxfs_dumpi(vip, ino);
	#endif
	vxfs_put_page(pp);
	return (vip);
	}

	printk(KERN_WARNING "vxfs: error on page %p\n", pp);
	return ERR_CAST(pp);

	fail:
	printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
	vxfs_put_page(pp);
	return ERR_PTR(-ENOMEM);
	}

	/**
	* vxfs_stiget - find inode using the structural inode list
	* @sbp: VFS superblock
	* @ino: inode #
	*
	* Description:
	* Find inode @ino in the filesystem described by @sbp using
	* the structural inode list.
	* Returns the matching VxFS inode on success, else a NULL pointer.
	*/
	struct vxfs_inode_info *
	vxfs_stiget(struct super_block *sbp, ino_t ino)
	{
	struct vxfs_inode_info *vip;

	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
	return IS_ERR(vip) ? NULL : vip;
	}

	/**
	* vxfs_transmod - mode for a VxFS inode
	* @vip: VxFS inode
	*
	* Description:
	* vxfs_transmod returns a Linux mode_t for a given
	* VxFS inode structure.
	*/
	static __inline__ umode_t
	vxfs_transmod(struct vxfs_inode_info *vip)
	{
	umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;

	if (VXFS_ISFIFO(vip))
	ret \|= S_IFIFO;
	if (VXFS_ISCHR(vip))
	ret \|= S_IFCHR;
	if (VXFS_ISDIR(vip))
	ret \|= S_IFDIR;
	if (VXFS_ISBLK(vip))
	ret \|= S_IFBLK;
	if (VXFS_ISLNK(vip))
	ret \|= S_IFLNK;
	if (VXFS_ISREG(vip))
	ret \|= S_IFREG;
	if (VXFS_ISSOC(vip))
	ret \|= S_IFSOCK;

	return (ret);
	}

	/**
	* vxfs_iinit- helper to fill inode fields
	* @ip: VFS inode
	* @vip: VxFS inode
	*
	* Description:
	* vxfs_instino is a helper function to fill in all relevant
	* fields in @ip from @vip.
	*/
	static void
	vxfs_iinit(struct inode ip, struct vxfs_inode_info vip)
	{

	ip->i_mode = vxfs_transmod(vip);
	i_uid_write(ip, (uid_t)vip->vii_uid);
	i_gid_write(ip, (gid_t)vip->vii_gid);

	set_nlink(ip, vip->vii_nlink);
	ip->i_size = vip->vii_size;

	ip->i_atime.tv_sec = vip->vii_atime;
	ip->i_ctime.tv_sec = vip->vii_ctime;
	ip->i_mtime.tv_sec = vip->vii_mtime;
	ip->i_atime.tv_nsec = 0;
	ip->i_ctime.tv_nsec = 0;
	ip->i_mtime.tv_nsec = 0;

	ip->i_blocks = vip->vii_blocks;
	ip->i_generation = vip->vii_gen;

	ip->i_private = vip;

	}

	/**
	* vxfs_get_fake_inode - get fake inode structure
	* @sbp: filesystem superblock
	* @vip: fspriv inode
	*
	* Description:
	* vxfs_fake_inode gets a fake inode (not in the inode hash) for a
	* superblock, vxfs_inode pair.
	* Returns the filled VFS inode.
	*/
	struct inode *
	vxfs_get_fake_inode(struct super_block sbp, struct vxfs_inode_info vip)
	{
	struct inode *ip = NULL;

	if ((ip = new_inode(sbp))) {
	ip->i_ino = get_next_ino();
	vxfs_iinit(ip, vip);
	ip->i_mapping->a_ops = &vxfs_aops;
	}
	return (ip);
	}

	/**
	* vxfs_put_fake_inode - free faked inode
	* *ip: VFS inode
	*
	* Description:
	* vxfs_put_fake_inode frees all data associated with @ip.
	*/
	void
	vxfs_put_fake_inode(struct inode *ip)
	{
	iput(ip);
	}

	/**
	* vxfs_iget - get an inode
	* @sbp: the superblock to get the inode for
	* @ino: the number of the inode to get
	*
	* Description:
	* vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
	* in all relevant fields in the new inode.
	*/
	struct inode *
	vxfs_iget(struct super_block *sbp, ino_t ino)
	{
	struct vxfs_inode_info *vip;
	const struct address_space_operations *aops;
	struct inode *ip;

	ip = iget_locked(sbp, ino);
	if (!ip)
	return ERR_PTR(-ENOMEM);
	if (!(ip->i_state & I_NEW))
	return ip;

	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
	if (IS_ERR(vip)) {
	iget_failed(ip);
	return ERR_CAST(vip);
	}

	vxfs_iinit(ip, vip);

	if (VXFS_ISIMMED(vip))
	aops = &vxfs_immed_aops;
	else
	aops = &vxfs_aops;

	if (S_ISREG(ip->i_mode)) {
	ip->i_fop = &generic_ro_fops;
	ip->i_mapping->a_ops = aops;
	} else if (S_ISDIR(ip->i_mode)) {
	ip->i_op = &vxfs_dir_inode_ops;
	ip->i_fop = &vxfs_dir_operations;
	ip->i_mapping->a_ops = aops;
	} else if (S_ISLNK(ip->i_mode)) {
	if (!VXFS_ISIMMED(vip)) {
	ip->i_op = &page_symlink_inode_operations;
	ip->i_mapping->a_ops = &vxfs_aops;
	} else {
	ip->i_op = &vxfs_immed_symlink_iops;
	vip->vii_immed.vi_immed[ip->i_size] = '\0';
	}
	} else
	init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));

	unlock_new_inode(ip);
	return ip;
	}

	static void vxfs_i_callback(struct rcu_head *head)
	{
	struct inode *inode = container_of(head, struct inode, i_rcu);
	kmem_cache_free(vxfs_inode_cachep, inode->i_private);
	}

	/**
	* vxfs_evict_inode - remove inode from main memory
	* @ip: inode to discard.
	*
	* Description:
	* vxfs_evict_inode() is called on the final iput and frees the private
	* inode area.
	*/
	void
	vxfs_evict_inode(struct inode *ip)
	{
	truncate_inode_pages(&ip->i_data, 0);
	clear_inode(ip);
	call_rcu(&ip->i_rcu, vxfs_i_callback);
	}