[mirror_ubuntu-bionic-kernel.git] / fs / freevxfs / vxfs_inode.c

/*
 * Copyright (c) 2000-2001 Christoph Hellwig.
 * Copyright (c) 2016 Krzysztof Blaszkowski
 * 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 <linux/namei.h>

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


#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_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);
}

static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
		struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
{
	struct inode *inode = &vip->vfs_inode;

	vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
	vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
	vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
	vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
	vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
	vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
	vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
	vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
	vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
	vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
	vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
	vip->vii_orgtype = dip->vdi_orgtype;

	vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
	vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);

	if (VXFS_ISDIR(vip))
		vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
	else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
		vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);

	/* don't endian swap the fields that differ by orgtype */
	memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));

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

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

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

	inode->i_blocks = vip->vii_blocks;
	inode->i_generation = vip->vii_gen;
}

/**
 * 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 inode *
vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
{
	struct buffer_head		*bp;
	struct inode			*inode;
	u_long				block, offset;

	inode = new_inode(sbp);
	if (!inode)
		return NULL;
	inode->i_ino = get_next_ino();

	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 = VXFS_INO(inode);
		struct vxfs_dinode	*dip;

		dip = (struct vxfs_dinode *)(bp->b_data + offset);
		dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
		vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
#ifdef DIAGNOSTIC
		vxfs_dumpi(vip, ino);
#endif
		brelse(bp);
		return inode;
	}

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

/**
 * __vxfs_iget - generic find inode facility
 * @ilistp:		inode list
 * @vip:		VxFS inode to fill in
 * @ino:		inode number
 *
 * Description:
 *  Search the for inode number @ino in the filesystem
 *  described by @sbp.  Use the specified inode table (@ilistp).
 *  Returns the matching inode on success, else an error code.
 */
static int
__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
{
	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_dinode	*dip;
		caddr_t			kaddr = (char *)page_address(pp);

		dip = (struct vxfs_dinode *)(kaddr + offset);
		dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
		vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
#ifdef DIAGNOSTIC
		vxfs_dumpi(vip, ino);
#endif
		vxfs_put_page(pp);
		return 0;
	}

	printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
		pp, (unsigned long)ino);
	return PTR_ERR(pp);
}

/**
 * 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 inode on success, else a NULL pointer.
 */
struct inode *
vxfs_stiget(struct super_block *sbp, ino_t ino)
{
	struct inode *inode;
	int error;

	inode = new_inode(sbp);
	if (!inode)
		return NULL;
	inode->i_ino = get_next_ino();

	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
	if (error) {
		iput(inode);
		return NULL;
	}

	return inode;
}

/**
 * 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;
	int error;

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

	vip = VXFS_INO(ip);
	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
	if (error) {
		iget_failed(ip);
		return ERR_PTR(error);
	}

	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;
			inode_nohighmem(ip);
			ip->i_mapping->a_ops = &vxfs_aops;
		} else {
			ip->i_op = &simple_symlink_inode_operations;
			ip->i_link = vip->vii_immed.vi_immed;
			nd_terminate_link(ip->i_link, ip->i_size,
					  sizeof(vip->vii_immed.vi_immed) - 1);
		}
	} 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_final(&ip->i_data);
	clear_inode(ip);
}
Commit	Line	Data
1da177e4 LT	1	/*
1da177e4 LT	2	* Copyright (c) 2000-2001 Christoph Hellwig.
1cce1701	3	* Copyright (c) 2016 Krzysztof Blaszkowski
1da177e4 LT	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions, and the following disclaimer,
	11	* without modification.
	12	* 2. The name of the author may not be used to endorse or promote products
	13	* derived from this software without specific prior written permission.
	14	*
	15	* Alternatively, this software may be distributed under the terms of the
	16	* GNU General Public License ("GPL").
	17	*
	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
	19	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	20	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	21	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
	22	* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	23	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	24	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	25	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	26	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	27	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	28	* SUCH DAMAGE.
	29	*/
	30
	31	/*
	32	* Veritas filesystem driver - inode routines.
	33	*/
	34	#include <linux/fs.h>
	35	#include <linux/buffer_head.h>
	36	#include <linux/pagemap.h>
	37	#include <linux/kernel.h>
	38	#include <linux/slab.h>
df64c082	39	#include <linux/namei.h>
1da177e4 LT	40
	41	#include "vxfs.h"
	42	#include "vxfs_inode.h"
	43	#include "vxfs_extern.h"
	44
	45
1da177e4 LT	46	#ifdef DIAGNOSTIC
	47	/*
	48	* Dump inode contents (partially).
	49	*/
	50	void
	51	vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
	52	{
	53	printk(KERN_DEBUG "\n\n");
	54	if (ino)
	55	printk(KERN_DEBUG "dumping vxfs inode %ld\n", ino);
	56	else
	57	printk(KERN_DEBUG "dumping unknown vxfs inode\n");
	58
	59	printk(KERN_DEBUG "---------------------------\n");
	60	printk(KERN_DEBUG "mode is %x\n", vip->vii_mode);
	61	printk(KERN_DEBUG "nlink:%u, uid:%u, gid:%u\n",
	62	vip->vii_nlink, vip->vii_uid, vip->vii_gid);
	63	printk(KERN_DEBUG "size:%Lx, blocks:%u\n",
	64	vip->vii_size, vip->vii_blocks);
	65	printk(KERN_DEBUG "orgtype:%u\n", vip->vii_orgtype);
	66	}
	67	#endif
	68
2f137e31 CH	69	/**
	70	* vxfs_transmod - mode for a VxFS inode
	71	* @vip: VxFS inode
	72	*
	73	* Description:
	74	* vxfs_transmod returns a Linux mode_t for a given
	75	* VxFS inode structure.
	76	*/
	77	static __inline__ umode_t
	78	vxfs_transmod(struct vxfs_inode_info *vip)
	79	{
	80	umode_t ret = vip->vii_mode & ~VXFS_TYPE_MASK;
	81
	82	if (VXFS_ISFIFO(vip))
	83	ret \|= S_IFIFO;
	84	if (VXFS_ISCHR(vip))
	85	ret \|= S_IFCHR;
	86	if (VXFS_ISDIR(vip))
	87	ret \|= S_IFDIR;
	88	if (VXFS_ISBLK(vip))
	89	ret \|= S_IFBLK;
	90	if (VXFS_ISLNK(vip))
	91	ret \|= S_IFLNK;
	92	if (VXFS_ISREG(vip))
	93	ret \|= S_IFREG;
	94	if (VXFS_ISSOC(vip))
	95	ret \|= S_IFSOCK;
	96
	97	return (ret);
	98	}
	99
0d83f7fc KB	100	static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
	101	struct vxfs_inode_info vip, struct vxfs_dinode dip)
	102	{
2f137e31 CH	103	struct inode *inode = &vip->vfs_inode;
2f137e31 CH	104
0d83f7fc KB	105	vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
	106	vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
	107	vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
	108	vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
	109	vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
	110	vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
	111	vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
	112	vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
	113	vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
	114	vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
	115	vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
	116	vip->vii_orgtype = dip->vdi_orgtype;
	117
	118	vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
	119	vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
	120
	121	if (VXFS_ISDIR(vip))
	122	vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
	123	else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
	124	vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);
	125
	126	/* don't endian swap the fields that differ by orgtype */
	127	memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
2f137e31 CH	128
	129	inode->i_mode = vxfs_transmod(vip);
	130	i_uid_write(inode, (uid_t)vip->vii_uid);
	131	i_gid_write(inode, (gid_t)vip->vii_gid);
	132
	133	set_nlink(inode, vip->vii_nlink);
	134	inode->i_size = vip->vii_size;
	135
	136	inode->i_atime.tv_sec = vip->vii_atime;
	137	inode->i_ctime.tv_sec = vip->vii_ctime;
	138	inode->i_mtime.tv_sec = vip->vii_mtime;
	139	inode->i_atime.tv_nsec = 0;
	140	inode->i_ctime.tv_nsec = 0;
	141	inode->i_mtime.tv_nsec = 0;
	142
	143	inode->i_blocks = vip->vii_blocks;
	144	inode->i_generation = vip->vii_gen;
0d83f7fc	145	}
1da177e4 LT	146
	147	/**
	148	* vxfs_blkiget - find inode based on extent #
	149	* @sbp: superblock of the filesystem we search in
	150	* @extent: number of the extent to search
	151	* @ino: inode number to search
	152	*
	153	* Description:
	154	* vxfs_blkiget searches inode @ino in the filesystem described by
	155	* @sbp in the extent @extent.
	156	* Returns the matching VxFS inode on success, else a NULL pointer.
	157	*
	158	* NOTE:
	159	* While __vxfs_iget uses the pagecache vxfs_blkiget uses the
	160	* buffercache. This function should not be used outside the
	161	* read_super() method, otherwise the data may be incoherent.
	162	*/
8985f53e	163	struct inode *
1da177e4 LT	164	vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
	165	{
	166	struct buffer_head *bp;
8985f53e	167	struct inode *inode;
1da177e4 LT	168	u_long block, offset;
1da177e4 LT	169
2f137e31 CH	170	inode = new_inode(sbp);
	171	if (!inode)
	172	return NULL;
	173	inode->i_ino = get_next_ino();
	174
1da177e4 LT	175	block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
	176	offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
	177	bp = sb_bread(sbp, block);
	178
82f703bb	179	if (bp && buffer_mapped(bp)) {
2f137e31	180	struct vxfs_inode_info *vip = VXFS_INO(inode);
1da177e4 LT	181	struct vxfs_dinode *dip;
1da177e4 LT	182
1da177e4	183	dip = (struct vxfs_dinode *)(bp->b_data + offset);
0d83f7fc	184	dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
2f137e31	185	vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
1da177e4 LT	186	#ifdef DIAGNOSTIC
	187	vxfs_dumpi(vip, ino);
	188	#endif
	189	brelse(bp);
8985f53e	190	return inode;
1da177e4 LT	191	}
1da177e4 LT	192
1da177e4 LT	193	printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
1da177e4 LT	194	brelse(bp);
2f137e31	195	iput(inode);
1da177e4 LT	196	return NULL;
	197	}
	198
	199	/**
	200	* __vxfs_iget - generic find inode facility
1da177e4	201	* @ilistp: inode list
2f137e31 CH	202	* @vip: VxFS inode to fill in
2f137e31 CH	203	* @ino: inode number
1da177e4 LT	204	*
	205	* Description:
	206	* Search the for inode number @ino in the filesystem
	207	* described by @sbp. Use the specified inode table (@ilistp).
8985f53e	208	* Returns the matching inode on success, else an error code.
1da177e4	209	*/
2f137e31 CH	210	static int
2f137e31 CH	211	__vxfs_iget(struct inode ilistp, struct vxfs_inode_info vip, ino_t ino)
1da177e4 LT	212	{
	213	struct page *pp;
	214	u_long offset;
	215
	216	offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
	217	pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
	218
	219	if (!IS_ERR(pp)) {
1da177e4 LT	220	struct vxfs_dinode *dip;
	221	caddr_t kaddr = (char *)page_address(pp);
	222
1da177e4	223	dip = (struct vxfs_dinode *)(kaddr + offset);
0d83f7fc	224	dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
2f137e31	225	vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
1da177e4 LT	226	#ifdef DIAGNOSTIC
	227	vxfs_dumpi(vip, ino);
	228	#endif
	229	vxfs_put_page(pp);
2f137e31	230	return 0;
1da177e4 LT	231	}
1da177e4 LT	232
2f137e31 CH	233	printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
	234	pp, (unsigned long)ino);
	235	return PTR_ERR(pp);
1da177e4 LT	236	}
	237
	238	/**
	239	* vxfs_stiget - find inode using the structural inode list
	240	* @sbp: VFS superblock
	241	* @ino: inode #
	242	*
	243	* Description:
	244	* Find inode @ino in the filesystem described by @sbp using
	245	* the structural inode list.
8985f53e	246	* Returns the matching inode on success, else a NULL pointer.
1da177e4	247	*/
8985f53e	248	struct inode *
1da177e4 LT	249	vxfs_stiget(struct super_block *sbp, ino_t ino)
1da177e4 LT	250	{
8985f53e	251	struct inode *inode;
2f137e31	252	int error;
d0b07948	253
2f137e31	254	inode = new_inode(sbp);
8985f53e	255	if (!inode)
2f137e31 CH	256	return NULL;
2f137e31 CH	257	inode->i_ino = get_next_ino();
1da177e4	258
2f137e31 CH	259	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
	260	if (error) {
	261	iput(inode);
	262	return NULL;
1da177e4	263	}
2f137e31 CH	264
2f137e31 CH	265	return inode;
1da177e4 LT	266	}
1da177e4 LT	267
1da177e4	268	/**
d0b07948 DH	269	* vxfs_iget - get an inode
	270	* @sbp: the superblock to get the inode for
	271	* @ino: the number of the inode to get
1da177e4 LT	272	*
1da177e4 LT	273	* Description:
d0b07948 DH	274	* vxfs_read_inode creates an inode, reads the disk inode for @ino and fills
d0b07948 DH	275	* in all relevant fields in the new inode.
1da177e4	276	*/
d0b07948 DH	277	struct inode *
d0b07948 DH	278	vxfs_iget(struct super_block *sbp, ino_t ino)
1da177e4	279	{
1da177e4	280	struct vxfs_inode_info *vip;
f5e54d6e	281	const struct address_space_operations *aops;
d0b07948	282	struct inode *ip;
2f137e31	283	int error;
d0b07948 DH	284
	285	ip = iget_locked(sbp, ino);
	286	if (!ip)
	287	return ERR_PTR(-ENOMEM);
	288	if (!(ip->i_state & I_NEW))
	289	return ip;
	290
2f137e31 CH	291	vip = VXFS_INO(ip);
	292	error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
	293	if (error) {
d0b07948	294	iget_failed(ip);
2f137e31	295	return ERR_PTR(error);
d0b07948	296	}
1da177e4	297
1da177e4 LT	298	if (VXFS_ISIMMED(vip))
	299	aops = &vxfs_immed_aops;
	300	else
	301	aops = &vxfs_aops;
	302
	303	if (S_ISREG(ip->i_mode)) {
dc487002	304	ip->i_fop = &generic_ro_fops;
1da177e4 LT	305	ip->i_mapping->a_ops = aops;
	306	} else if (S_ISDIR(ip->i_mode)) {
	307	ip->i_op = &vxfs_dir_inode_ops;
	308	ip->i_fop = &vxfs_dir_operations;
	309	ip->i_mapping->a_ops = aops;
	310	} else if (S_ISLNK(ip->i_mode)) {
	311	if (!VXFS_ISIMMED(vip)) {
	312	ip->i_op = &page_symlink_inode_operations;
21fc61c7	313	inode_nohighmem(ip);
1da177e4	314	ip->i_mapping->a_ops = &vxfs_aops;
a63d0ff3	315	} else {
df64c082 AV	316	ip->i_op = &simple_symlink_inode_operations;
	317	ip->i_link = vip->vii_immed.vi_immed;
	318	nd_terminate_link(ip->i_link, ip->i_size,
	319	sizeof(vip->vii_immed.vi_immed) - 1);
a63d0ff3	320	}
1da177e4 LT	321	} else
	322	init_special_inode(ip, ip->i_mode, old_decode_dev(vip->vii_rdev));
	323
d0b07948 DH	324	unlock_new_inode(ip);
d0b07948 DH	325	return ip;
1da177e4 LT	326	}
	327
	328	/**
b57922d9	329	* vxfs_evict_inode - remove inode from main memory
1da177e4 LT	330	* @ip: inode to discard.
	331	*
	332	* Description:
b57922d9	333	* vxfs_evict_inode() is called on the final iput and frees the private
1da177e4 LT	334	* inode area.
	335	*/
	336	void
b57922d9	337	vxfs_evict_inode(struct inode *ip)
1da177e4	338	{
91b0abe3	339	truncate_inode_pages_final(&ip->i_data);
dbd5768f	340	clear_inode(ip);
1da177e4	341	}