[net-next-2.6.git] / fs / freevxfs / vxfs_inode.c

/*
 * 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__ mode_t
vxfs_transmod(struct vxfs_inode_info *vip)
{
	mode_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);
	ip->i_uid = (uid_t)vip->vii_uid;
	ip->i_gid = (gid_t)vip->vii_gid;

	ip->i_nlink = 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 asssociated 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;
}

/**
 * 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);
	end_writeback(ip);
	kmem_cache_free(vxfs_inode_cachep, ip->i_private);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (c) 2000-2001 Christoph Hellwig.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions, and the following disclaimer,
	10	* without modification.
	11	* 2. The name of the author may not be used to endorse or promote products
	12	* derived from this software without specific prior written permission.
	13	*
	14	* Alternatively, this software may be distributed under the terms of the
	15	* GNU General Public License ("GPL").
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
	21	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
	30	/*
	31	* Veritas filesystem driver - inode routines.
	32	*/
	33	#include <linux/fs.h>
	34	#include <linux/buffer_head.h>
	35	#include <linux/pagemap.h>
	36	#include <linux/kernel.h>
	37	#include <linux/slab.h>
	38
	39	#include "vxfs.h"
	40	#include "vxfs_inode.h"
	41	#include "vxfs_extern.h"
	42
	43
e18b890b	44	struct kmem_cache *vxfs_inode_cachep;
1da177e4 LT	45
	46
	47	#ifdef DIAGNOSTIC
	48	/*
	49	* Dump inode contents (partially).
	50	*/
	51	void
	52	vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
	53	{
	54	printk(KERN_DEBUG "\n\n");
	55	if (ino)
	56	printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
	57	else
	58	printk(KERN_DEBUG "dumping unknown vxfs inode\n");
	59
	60	printk(KERN_DEBUG "---------------------------\n");
	61	printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
	62	printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
	63	vip->vii_nlink, vip->vii_uid, vip->vii_gid);
	64	printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
	65	vip->vii_size, vip->vii_blocks);
	66	printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
	67	}
	68	#endif
	69
	70
	71	/**
	72	* vxfs_blkiget - find inode based on extent #
	73	* @sbp: superblock of the filesystem we search in
	74	* @extent: number of the extent to search
	75	* @ino: inode number to search
	76	*
	77	* Description:
	78	* vxfs_blkiget searches inode @ino in the filesystem described by
	79	* @sbp in the extent @extent.
	80	* Returns the matching VxFS inode on success, else a NULL pointer.
	81	*
	82	* NOTE:
	83	* While __vxfs_iget uses the pagecache vxfs_blkiget uses the
	84	* buffercache. This function should not be used outside the
	85	* read_super() method, otherwise the data may be incoherent.
	86	*/
	87	struct vxfs_inode_info *
	88	vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
	89	{
	90	struct buffer_head *bp;
	91	u_long block, offset;
	92
	93	block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
	94	offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
	95	bp = sb_bread(sbp, block);
	96
82f703bb	97	if (bp && buffer_mapped(bp)) {
1da177e4 LT	98	struct vxfs_inode_info *vip;
	99	struct vxfs_dinode *dip;
	100
e94b1766	101	if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
1da177e4 LT	102	goto fail;
	103	dip = (struct vxfs_dinode *)(bp->b_data + offset);
	104	memcpy(vip, dip, sizeof(*vip));
	105	#ifdef DIAGNOSTIC
	106	vxfs_dumpi(vip, ino);
	107	#endif
	108	brelse(bp);
	109	return (vip);
	110	}
	111
	112	fail:
	113	printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
	114	brelse(bp);
	115	return NULL;
	116	}
	117
	118	/**
	119	* __vxfs_iget - generic find inode facility
	120	* @sbp: VFS superblock
	121	* @ino: inode number
	122	* @ilistp: inode list
	123	*
	124	* Description:
	125	* Search the for inode number @ino in the filesystem
	126	* described by @sbp. Use the specified inode table (@ilistp).
d0b07948	127	* Returns the matching VxFS inode on success, else an error code.
1da177e4 LT	128	*/
	129	static struct vxfs_inode_info *
	130	__vxfs_iget(ino_t ino, struct inode *ilistp)
	131	{
	132	struct page *pp;
	133	u_long offset;
	134
	135	offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
	136	pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
	137
	138	if (!IS_ERR(pp)) {
	139	struct vxfs_inode_info *vip;
	140	struct vxfs_dinode *dip;
	141	caddr_t kaddr = (char *)page_address(pp);
	142
e94b1766	143	if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
1da177e4 LT	144	goto fail;
	145	dip = (struct vxfs_dinode *)(kaddr + offset);
	146	memcpy(vip, dip, sizeof(*vip));
	147	#ifdef DIAGNOSTIC
	148	vxfs_dumpi(vip, ino);
	149	#endif
	150	vxfs_put_page(pp);
	151	return (vip);
	152	}
	153
	154	printk(KERN_WARNING "vxfs: error on page %p\n", pp);
d0b07948	155	return ERR_CAST(pp);
1da177e4 LT	156
	157	fail:
	158	printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
	159	vxfs_put_page(pp);
d0b07948	160	return ERR_PTR(-ENOMEM);
1da177e4 LT	161	}
	162
	163	/**
	164	* vxfs_stiget - find inode using the structural inode list
	165	* @sbp: VFS superblock
	166	* @ino: inode #
	167	*
	168	* Description:
	169	* Find inode @ino in the filesystem described by @sbp using
	170	* the structural inode list.
	171	* Returns the matching VxFS inode on success, else a NULL pointer.
	172	*/
	173	struct vxfs_inode_info *
	174	vxfs_stiget(struct super_block *sbp, ino_t ino)
	175	{
d0b07948 DH	176	struct vxfs_inode_info *vip;
	177
	178	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
	179	return IS_ERR(vip) ? NULL : vip;
1da177e4 LT	180	}
	181
	182	/**
	183	* vxfs_transmod - mode for a VxFS inode
	184	* @vip: VxFS inode
	185	*
	186	* Description:
	187	* vxfs_transmod returns a Linux mode_t for a given
	188	* VxFS inode structure.
	189	*/
	190	static __inline__ mode_t
	191	vxfs_transmod(struct vxfs_inode_info *vip)
	192	{
	193	mode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
	194
	195	if (VXFS_ISFIFO(vip))
	196	ret \|= S_IFIFO;
	197	if (VXFS_ISCHR(vip))
	198	ret \|= S_IFCHR;
	199	if (VXFS_ISDIR(vip))
	200	ret \|= S_IFDIR;
	201	if (VXFS_ISBLK(vip))
	202	ret \|= S_IFBLK;
	203	if (VXFS_ISLNK(vip))
	204	ret \|= S_IFLNK;
	205	if (VXFS_ISREG(vip))
	206	ret \|= S_IFREG;
	207	if (VXFS_ISSOC(vip))
	208	ret \|= S_IFSOCK;
	209
	210	return (ret);
	211	}
	212
	213	/**
	214	* vxfs_iinit- helper to fill inode fields
	215	* @ip: VFS inode
	216	* @vip: VxFS inode
	217	*
	218	* Description:
	219	* vxfs_instino is a helper function to fill in all relevant
	220	* fields in @ip from @vip.
	221	*/
	222	static void
	223	vxfs_iinit(struct inode ip, struct vxfs_inode_info vip)
	224	{
	225
	226	ip->i_mode = vxfs_transmod(vip);
	227	ip->i_uid = (uid_t)vip->vii_uid;
	228	ip->i_gid = (gid_t)vip->vii_gid;
	229
	230	ip->i_nlink = vip->vii_nlink;
	231	ip->i_size = vip->vii_size;
	232
	233	ip->i_atime.tv_sec = vip->vii_atime;
	234	ip->i_ctime.tv_sec = vip->vii_ctime;
	235	ip->i_mtime.tv_sec = vip->vii_mtime;
	236	ip->i_atime.tv_nsec = 0;
	237	ip->i_ctime.tv_nsec = 0;
	238	ip->i_mtime.tv_nsec = 0;
	239
1da177e4 LT	240	ip->i_blocks = vip->vii_blocks;
	241	ip->i_generation = vip->vii_gen;
	242
8e18e294	243	ip->i_private = vip;
1da177e4 LT	244
	245	}
	246
	247	/**
	248	* vxfs_get_fake_inode - get fake inode structure
	249	* @sbp: filesystem superblock
	250	* @vip: fspriv inode
	251	*
	252	* Description:
	253	* vxfs_fake_inode gets a fake inode (not in the inode hash) for a
	254	* superblock, vxfs_inode pair.
	255	* Returns the filled VFS inode.
	256	*/
	257	struct inode *
	258	vxfs_get_fake_inode(struct super_block sbp, struct vxfs_inode_info vip)
	259	{
	260	struct inode *ip = NULL;
	261
	262	if ((ip = new_inode(sbp))) {
85fe4025	263	ip->i_ino = get_next_ino();
1da177e4 LT	264	vxfs_iinit(ip, vip);
	265	ip->i_mapping->a_ops = &vxfs_aops;
	266	}
	267	return (ip);
	268	}
	269
	270	/**
	271	* vxfs_put_fake_inode - free faked inode
	272	* *ip: VFS inode
	273	*
	274	* Description:
	275	* vxfs_put_fake_inode frees all data asssociated with @ip.
	276	*/
	277	void
	278	vxfs_put_fake_inode(struct inode *ip)
	279	{
	280	iput(ip);
	281	}
	282
	283	/**
d0b07948 DH	284	* vxfs_iget - get an inode
	285	* @sbp: the superblock to get the inode for
	286	* @ino: the number of the inode to get
1da177e4 LT	287	*
1da177e4 LT	288	* Description:
d0b07948 DH	289	* vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
d0b07948 DH	290	* in all relevant fields in the new inode.
1da177e4	291	*/
d0b07948 DH	292	struct inode *
d0b07948 DH	293	vxfs_iget(struct super_block *sbp, ino_t ino)
1da177e4	294	{
1da177e4	295	struct vxfs_inode_info *vip;
f5e54d6e	296	const struct address_space_operations *aops;
d0b07948 DH	297	struct inode *ip;
	298
	299	ip = iget_locked(sbp, ino);
	300	if (!ip)
	301	return ERR_PTR(-ENOMEM);
	302	if (!(ip->i_state & I_NEW))
	303	return ip;
	304
	305	vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
	306	if (IS_ERR(vip)) {
	307	iget_failed(ip);
	308	return ERR_CAST(vip);
	309	}
1da177e4 LT	310
	311	vxfs_iinit(ip, vip);
	312
	313	if (VXFS_ISIMMED(vip))
	314	aops = &vxfs_immed_aops;
	315	else
	316	aops = &vxfs_aops;
	317
	318	if (S_ISREG(ip->i_mode)) {
dc487002	319	ip->i_fop = &generic_ro_fops;
1da177e4 LT	320	ip->i_mapping->a_ops = aops;
	321	} else if (S_ISDIR(ip->i_mode)) {
	322	ip->i_op = &vxfs_dir_inode_ops;
	323	ip->i_fop = &vxfs_dir_operations;
	324	ip->i_mapping->a_ops = aops;
	325	} else if (S_ISLNK(ip->i_mode)) {
	326	if (!VXFS_ISIMMED(vip)) {
	327	ip->i_op = &page_symlink_inode_operations;
	328	ip->i_mapping->a_ops = &vxfs_aops;
a63d0ff3	329	} else {
1da177e4	330	ip->i_op = &vxfs_immed_symlink_iops;
a63d0ff3 DG	331	vip->vii_immed.vi_immed[ip->i_size] = '\0';
a63d0ff3 DG	332	}
1da177e4 LT	333	} else
	334	init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
	335
d0b07948 DH	336	unlock_new_inode(ip);
d0b07948 DH	337	return ip;
1da177e4 LT	338	}
	339
	340	/**
b57922d9	341	* vxfs_evict_inode - remove inode from main memory
1da177e4 LT	342	* @ip: inode to discard.
	343	*
	344	* Description:
b57922d9	345	* vxfs_evict_inode() is called on the final iput and frees the private
1da177e4 LT	346	* inode area.
	347	*/
	348	void
b57922d9	349	vxfs_evict_inode(struct inode *ip)
1da177e4	350	{
b57922d9 AV	351	truncate_inode_pages(&ip->i_data, 0);
b57922d9 AV	352	end_writeback(ip);
8e18e294	353	kmem_cache_free(vxfs_inode_cachep, ip->i_private);
1da177e4	354	}