[linux.git] / fs / sysv / inode.c

/*
 *  linux/fs/sysv/inode.c
 *
 *  minix/inode.c
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  xenix/inode.c
 *  Copyright (C) 1992  Doug Evans
 *
 *  coh/inode.c
 *  Copyright (C) 1993  Pascal Haible, Bruno Haible
 *
 *  sysv/inode.c
 *  Copyright (C) 1993  Paul B. Monday
 *
 *  sysv/inode.c
 *  Copyright (C) 1993  Bruno Haible
 *  Copyright (C) 1997, 1998  Krzysztof G. Baranowski
 *
 *  This file contains code for allocating/freeing inodes and for read/writing
 *  the superblock.
 */

#include <linux/highuid.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>
#include <linux/namei.h>
#include <asm/byteorder.h>
#include "sysv.h"

static int sysv_sync_fs(struct super_block *sb, int wait)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);
	unsigned long time = get_seconds(), old_time;

	lock_super(sb);

	/*
	 * If we are going to write out the super block,
	 * then attach current time stamp.
	 * But if the filesystem was marked clean, keep it clean.
	 */
	old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
	if (sbi->s_type == FSTYPE_SYSV4) {
		if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
			*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
		*sbi->s_sb_time = cpu_to_fs32(sbi, time);
		mark_buffer_dirty(sbi->s_bh2);
	}

	unlock_super(sb);

	return 0;
}

static void sysv_write_super(struct super_block *sb)
{
	if (!(sb->s_flags & MS_RDONLY))
		sysv_sync_fs(sb, 1);
	else
		sb->s_dirt = 0;
}

static int sysv_remount(struct super_block *sb, int *flags, char *data)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);
	lock_super(sb);
	if (sbi->s_forced_ro)
		*flags |= MS_RDONLY;
	if (!(*flags & MS_RDONLY))
		sb->s_dirt = 1;
	unlock_super(sb);
	return 0;
}

static void sysv_put_super(struct super_block *sb)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);

	if (sb->s_dirt)
		sysv_write_super(sb);

	if (!(sb->s_flags & MS_RDONLY)) {
		/* XXX ext2 also updates the state here */
		mark_buffer_dirty(sbi->s_bh1);
		if (sbi->s_bh1 != sbi->s_bh2)
			mark_buffer_dirty(sbi->s_bh2);
	}

	brelse(sbi->s_bh1);
	if (sbi->s_bh1 != sbi->s_bh2)
		brelse(sbi->s_bh2);

	kfree(sbi);
}

static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf)
{
	struct super_block *sb = dentry->d_sb;
	struct sysv_sb_info *sbi = SYSV_SB(sb);
	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);

	buf->f_type = sb->s_magic;
	buf->f_bsize = sb->s_blocksize;
	buf->f_blocks = sbi->s_ndatazones;
	buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
	buf->f_files = sbi->s_ninodes;
	buf->f_ffree = sysv_count_free_inodes(sb);
	buf->f_namelen = SYSV_NAMELEN;
	buf->f_fsid.val[0] = (u32)id;
	buf->f_fsid.val[1] = (u32)(id >> 32);
	return 0;
}

/* 
 * NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
 */
static inline void read3byte(struct sysv_sb_info *sbi,
	unsigned char * from, unsigned char * to)
{
	if (sbi->s_bytesex == BYTESEX_PDP) {
		to[0] = from[0];
		to[1] = 0;
		to[2] = from[1];
		to[3] = from[2];
	} else if (sbi->s_bytesex == BYTESEX_LE) {
		to[0] = from[0];
		to[1] = from[1];
		to[2] = from[2];
		to[3] = 0;
	} else {
		to[0] = 0;
		to[1] = from[0];
		to[2] = from[1];
		to[3] = from[2];
	}
}

static inline void write3byte(struct sysv_sb_info *sbi,
	unsigned char * from, unsigned char * to)
{
	if (sbi->s_bytesex == BYTESEX_PDP) {
		to[0] = from[0];
		to[1] = from[2];
		to[2] = from[3];
	} else if (sbi->s_bytesex == BYTESEX_LE) {
		to[0] = from[0];
		to[1] = from[1];
		to[2] = from[2];
	} else {
		to[0] = from[1];
		to[1] = from[2];
		to[2] = from[3];
	}
}

static const struct inode_operations sysv_symlink_inode_operations = {
	.readlink	= generic_readlink,
	.follow_link	= page_follow_link_light,
	.put_link	= page_put_link,
	.getattr	= sysv_getattr,
};

void sysv_set_inode(struct inode *inode, dev_t rdev)
{
	if (S_ISREG(inode->i_mode)) {
		inode->i_op = &sysv_file_inode_operations;
		inode->i_fop = &sysv_file_operations;
		inode->i_mapping->a_ops = &sysv_aops;
	} else if (S_ISDIR(inode->i_mode)) {
		inode->i_op = &sysv_dir_inode_operations;
		inode->i_fop = &sysv_dir_operations;
		inode->i_mapping->a_ops = &sysv_aops;
	} else if (S_ISLNK(inode->i_mode)) {
		if (inode->i_blocks) {
			inode->i_op = &sysv_symlink_inode_operations;
			inode->i_mapping->a_ops = &sysv_aops;
		} else {
			inode->i_op = &sysv_fast_symlink_inode_operations;
			nd_terminate_link(SYSV_I(inode)->i_data, inode->i_size,
				sizeof(SYSV_I(inode)->i_data) - 1);
		}
	} else
		init_special_inode(inode, inode->i_mode, rdev);
}

struct inode *sysv_iget(struct super_block *sb, unsigned int ino)
{
	struct sysv_sb_info * sbi = SYSV_SB(sb);
	struct buffer_head * bh;
	struct sysv_inode * raw_inode;
	struct sysv_inode_info * si;
	struct inode *inode;
	unsigned int block;

	if (!ino || ino > sbi->s_ninodes) {
		printk("Bad inode number on dev %s: %d is out of range\n",
		       sb->s_id, ino);
		return ERR_PTR(-EIO);
	}

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

	raw_inode = sysv_raw_inode(sb, ino, &bh);
	if (!raw_inode) {
		printk("Major problem: unable to read inode from dev %s\n",
		       inode->i_sb->s_id);
		goto bad_inode;
	}
	/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
	inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
	inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid);
	inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid);
	inode->i_nlink = fs16_to_cpu(sbi, raw_inode->i_nlink);
	inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
	inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
	inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
	inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
	inode->i_ctime.tv_nsec = 0;
	inode->i_atime.tv_nsec = 0;
	inode->i_mtime.tv_nsec = 0;
	inode->i_blocks = 0;

	si = SYSV_I(inode);
	for (block = 0; block < 10+1+1+1; block++)
		read3byte(sbi, &raw_inode->i_data[3*block],
				(u8 *)&si->i_data[block]);
	brelse(bh);
	si->i_dir_start_lookup = 0;
	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
		sysv_set_inode(inode,
			       old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
	else
		sysv_set_inode(inode, 0);
	unlock_new_inode(inode);
	return inode;

bad_inode:
	iget_failed(inode);
	return ERR_PTR(-EIO);
}

int sysv_write_inode(struct inode *inode, int wait)
{
	struct super_block * sb = inode->i_sb;
	struct sysv_sb_info * sbi = SYSV_SB(sb);
	struct buffer_head * bh;
	struct sysv_inode * raw_inode;
	struct sysv_inode_info * si;
	unsigned int ino, block;
	int err = 0;

	ino = inode->i_ino;
	if (!ino || ino > sbi->s_ninodes) {
		printk("Bad inode number on dev %s: %d is out of range\n",
		       inode->i_sb->s_id, ino);
		return -EIO;
	}
	raw_inode = sysv_raw_inode(sb, ino, &bh);
	if (!raw_inode) {
		printk("unable to read i-node block\n");
		return -EIO;
	}

	raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
	raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
	raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
	raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
	raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
	raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
	raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);

	si = SYSV_I(inode);
	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
		si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
	for (block = 0; block < 10+1+1+1; block++)
		write3byte(sbi, (u8 *)&si->i_data[block],
			&raw_inode->i_data[3*block]);
	mark_buffer_dirty(bh);
	if (wait) {
                sync_dirty_buffer(bh);
                if (buffer_req(bh) && !buffer_uptodate(bh)) {
                        printk ("IO error syncing sysv inode [%s:%08x]\n",
                                sb->s_id, ino);
                        err = -EIO;
                }
        }
	brelse(bh);
	return 0;
}

int sysv_sync_inode(struct inode *inode)
{
	return sysv_write_inode(inode, 1);
}

static void sysv_delete_inode(struct inode *inode)
{
	truncate_inode_pages(&inode->i_data, 0);
	inode->i_size = 0;
	sysv_truncate(inode);
	sysv_free_inode(inode);
}

static struct kmem_cache *sysv_inode_cachep;

static struct inode *sysv_alloc_inode(struct super_block *sb)
{
	struct sysv_inode_info *si;

	si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
	if (!si)
		return NULL;
	return &si->vfs_inode;
}

static void sysv_destroy_inode(struct inode *inode)
{
	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
}

static void init_once(void *p)
{
	struct sysv_inode_info *si = (struct sysv_inode_info *)p;

	inode_init_once(&si->vfs_inode);
}

const struct super_operations sysv_sops = {
	.alloc_inode	= sysv_alloc_inode,
	.destroy_inode	= sysv_destroy_inode,
	.write_inode	= sysv_write_inode,
	.delete_inode	= sysv_delete_inode,
	.put_super	= sysv_put_super,
	.write_super	= sysv_write_super,
	.sync_fs	= sysv_sync_fs,
	.remount_fs	= sysv_remount,
	.statfs		= sysv_statfs,
};

int __init sysv_init_icache(void)
{
	sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
			sizeof(struct sysv_inode_info), 0,
			SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
			init_once);
	if (!sysv_inode_cachep)
		return -ENOMEM;
	return 0;
}

void sysv_destroy_icache(void)
{
	kmem_cache_destroy(sysv_inode_cachep);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/sysv/inode.c
	3	*
	4	* minix/inode.c
	5	* Copyright (C) 1991, 1992 Linus Torvalds
	6	*
	7	* xenix/inode.c
	8	* Copyright (C) 1992 Doug Evans
	9	*
	10	* coh/inode.c
	11	* Copyright (C) 1993 Pascal Haible, Bruno Haible
	12	*
	13	* sysv/inode.c
	14	* Copyright (C) 1993 Paul B. Monday
	15	*
	16	* sysv/inode.c
	17	* Copyright (C) 1993 Bruno Haible
	18	* Copyright (C) 1997, 1998 Krzysztof G. Baranowski
	19	*
	20	* This file contains code for allocating/freeing inodes and for read/writing
	21	* the superblock.
	22	*/
	23
1da177e4 LT	24	#include <linux/highuid.h>
	25	#include <linux/slab.h>
	26	#include <linux/init.h>
	27	#include <linux/buffer_head.h>
	28	#include <linux/vfs.h>
21acaf8e	29	#include <linux/namei.h>
1da177e4 LT	30	#include <asm/byteorder.h>
	31	#include "sysv.h"
	32
ad43ffde	33	static int sysv_sync_fs(struct super_block *sb, int wait)
1da177e4 LT	34	{
	35	struct sysv_sb_info *sbi = SYSV_SB(sb);
	36	unsigned long time = get_seconds(), old_time;
	37
ebc1ac16	38	lock_super(sb);
1da177e4 LT	39
	40	/*
	41	* If we are going to write out the super block,
	42	* then attach current time stamp.
	43	* But if the filesystem was marked clean, keep it clean.
	44	*/
	45	old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
	46	if (sbi->s_type == FSTYPE_SYSV4) {
	47	if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
	48	*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
	49	*sbi->s_sb_time = cpu_to_fs32(sbi, time);
	50	mark_buffer_dirty(sbi->s_bh2);
	51	}
ad43ffde	52
ebc1ac16	53	unlock_super(sb);
ad43ffde CH	54
	55	return 0;
	56	}
	57
	58	static void sysv_write_super(struct super_block *sb)
	59	{
	60	if (!(sb->s_flags & MS_RDONLY))
	61	sysv_sync_fs(sb, 1);
	62	else
	63	sb->s_dirt = 0;
1da177e4 LT	64	}
	65
	66	static int sysv_remount(struct super_block sb, int flags, char *data)
	67	{
	68	struct sysv_sb_info *sbi = SYSV_SB(sb);
bbd6851a	69	lock_super(sb);
1da177e4 LT	70	if (sbi->s_forced_ro)
	71	*flags \|= MS_RDONLY;
	72	if (!(*flags & MS_RDONLY))
	73	sb->s_dirt = 1;
bbd6851a	74	unlock_super(sb);
1da177e4 LT	75	return 0;
	76	}
	77
	78	static void sysv_put_super(struct super_block *sb)
	79	{
	80	struct sysv_sb_info *sbi = SYSV_SB(sb);
	81
8c85e125 CH	82	if (sb->s_dirt)
	83	sysv_write_super(sb);
	84
1da177e4 LT	85	if (!(sb->s_flags & MS_RDONLY)) {
	86	/* XXX ext2 also updates the state here */
	87	mark_buffer_dirty(sbi->s_bh1);
	88	if (sbi->s_bh1 != sbi->s_bh2)
	89	mark_buffer_dirty(sbi->s_bh2);
	90	}
	91
	92	brelse(sbi->s_bh1);
	93	if (sbi->s_bh1 != sbi->s_bh2)
	94	brelse(sbi->s_bh2);
	95
	96	kfree(sbi);
	97	}
	98
726c3342	99	static int sysv_statfs(struct dentry dentry, struct kstatfs buf)
1da177e4	100	{
726c3342	101	struct super_block *sb = dentry->d_sb;
1da177e4	102	struct sysv_sb_info *sbi = SYSV_SB(sb);
1c5b4541	103	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1da177e4 LT	104
	105	buf->f_type = sb->s_magic;
	106	buf->f_bsize = sb->s_blocksize;
	107	buf->f_blocks = sbi->s_ndatazones;
	108	buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
	109	buf->f_files = sbi->s_ninodes;
	110	buf->f_ffree = sysv_count_free_inodes(sb);
	111	buf->f_namelen = SYSV_NAMELEN;
1c5b4541 CL	112	buf->f_fsid.val[0] = (u32)id;
1c5b4541 CL	113	buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4 LT	114	return 0;
	115	}
	116
	117	/*
	118	* NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
	119	*/
	120	static inline void read3byte(struct sysv_sb_info *sbi,
	121	unsigned char * from, unsigned char * to)
	122	{
	123	if (sbi->s_bytesex == BYTESEX_PDP) {
	124	to[0] = from[0];
	125	to[1] = 0;
	126	to[2] = from[1];
	127	to[3] = from[2];
	128	} else if (sbi->s_bytesex == BYTESEX_LE) {
	129	to[0] = from[0];
	130	to[1] = from[1];
	131	to[2] = from[2];
	132	to[3] = 0;
	133	} else {
	134	to[0] = 0;
	135	to[1] = from[0];
	136	to[2] = from[1];
	137	to[3] = from[2];
	138	}
	139	}
	140
	141	static inline void write3byte(struct sysv_sb_info *sbi,
	142	unsigned char * from, unsigned char * to)
	143	{
	144	if (sbi->s_bytesex == BYTESEX_PDP) {
	145	to[0] = from[0];
	146	to[1] = from[2];
	147	to[2] = from[3];
	148	} else if (sbi->s_bytesex == BYTESEX_LE) {
	149	to[0] = from[0];
	150	to[1] = from[1];
	151	to[2] = from[2];
	152	} else {
	153	to[0] = from[1];
	154	to[1] = from[2];
	155	to[2] = from[3];
	156	}
	157	}
	158
c5ef1c42	159	static const struct inode_operations sysv_symlink_inode_operations = {
1da177e4 LT	160	.readlink = generic_readlink,
	161	.follow_link = page_follow_link_light,
	162	.put_link = page_put_link,
	163	.getattr = sysv_getattr,
	164	};
	165
	166	void sysv_set_inode(struct inode *inode, dev_t rdev)
	167	{
	168	if (S_ISREG(inode->i_mode)) {
	169	inode->i_op = &sysv_file_inode_operations;
	170	inode->i_fop = &sysv_file_operations;
	171	inode->i_mapping->a_ops = &sysv_aops;
	172	} else if (S_ISDIR(inode->i_mode)) {
	173	inode->i_op = &sysv_dir_inode_operations;
	174	inode->i_fop = &sysv_dir_operations;
	175	inode->i_mapping->a_ops = &sysv_aops;
	176	} else if (S_ISLNK(inode->i_mode)) {
	177	if (inode->i_blocks) {
	178	inode->i_op = &sysv_symlink_inode_operations;
	179	inode->i_mapping->a_ops = &sysv_aops;
21acaf8e	180	} else {
1da177e4	181	inode->i_op = &sysv_fast_symlink_inode_operations;
21acaf8e DG	182	nd_terminate_link(SYSV_I(inode)->i_data, inode->i_size,
	183	sizeof(SYSV_I(inode)->i_data) - 1);
	184	}
1da177e4 LT	185	} else
	186	init_special_inode(inode, inode->i_mode, rdev);
	187	}
	188
b8e1343f	189	struct inode sysv_iget(struct super_block sb, unsigned int ino)
1da177e4	190	{
1da177e4 LT	191	struct sysv_sb_info * sbi = SYSV_SB(sb);
	192	struct buffer_head * bh;
	193	struct sysv_inode * raw_inode;
	194	struct sysv_inode_info * si;
b8e1343f DH	195	struct inode *inode;
b8e1343f DH	196	unsigned int block;
1da177e4 LT	197
	198	if (!ino \|\| ino > sbi->s_ninodes) {
	199	printk("Bad inode number on dev %s: %d is out of range\n",
b8e1343f DH	200	sb->s_id, ino);
b8e1343f DH	201	return ERR_PTR(-EIO);
1da177e4	202	}
b8e1343f DH	203
	204	inode = iget_locked(sb, ino);
	205	if (!inode)
	206	return ERR_PTR(-ENOMEM);
	207	if (!(inode->i_state & I_NEW))
	208	return inode;
	209
1da177e4 LT	210	raw_inode = sysv_raw_inode(sb, ino, &bh);
	211	if (!raw_inode) {
	212	printk("Major problem: unable to read inode from dev %s\n",
	213	inode->i_sb->s_id);
	214	goto bad_inode;
	215	}
	216	/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
	217	inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
	218	inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid);
	219	inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid);
	220	inode->i_nlink = fs16_to_cpu(sbi, raw_inode->i_nlink);
	221	inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
	222	inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
	223	inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
	224	inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
	225	inode->i_ctime.tv_nsec = 0;
	226	inode->i_atime.tv_nsec = 0;
	227	inode->i_mtime.tv_nsec = 0;
ba52de12	228	inode->i_blocks = 0;
1da177e4 LT	229
	230	si = SYSV_I(inode);
	231	for (block = 0; block < 10+1+1+1; block++)
	232	read3byte(sbi, &raw_inode->i_data[3*block],
	233	(u8 *)&si->i_data[block]);
	234	brelse(bh);
	235	si->i_dir_start_lookup = 0;
	236	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	237	sysv_set_inode(inode,
	238	old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
	239	else
	240	sysv_set_inode(inode, 0);
b8e1343f DH	241	unlock_new_inode(inode);
b8e1343f DH	242	return inode;
1da177e4 LT	243
1da177e4 LT	244	bad_inode:
b8e1343f DH	245	iget_failed(inode);
b8e1343f DH	246	return ERR_PTR(-EIO);
1da177e4 LT	247	}
1da177e4 LT	248
05459ca8	249	int sysv_write_inode(struct inode *inode, int wait)
1da177e4 LT	250	{
	251	struct super_block * sb = inode->i_sb;
	252	struct sysv_sb_info * sbi = SYSV_SB(sb);
	253	struct buffer_head * bh;
	254	struct sysv_inode * raw_inode;
	255	struct sysv_inode_info * si;
	256	unsigned int ino, block;
05459ca8	257	int err = 0;
1da177e4 LT	258
	259	ino = inode->i_ino;
	260	if (!ino \|\| ino > sbi->s_ninodes) {
	261	printk("Bad inode number on dev %s: %d is out of range\n",
	262	inode->i_sb->s_id, ino);
05459ca8	263	return -EIO;
1da177e4 LT	264	}
	265	raw_inode = sysv_raw_inode(sb, ino, &bh);
	266	if (!raw_inode) {
	267	printk("unable to read i-node block\n");
05459ca8	268	return -EIO;
1da177e4 LT	269	}
	270
	271	raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
	272	raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
	273	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
	274	raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
	275	raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
	276	raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
	277	raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
	278	raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
	279
	280	si = SYSV_I(inode);
	281	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	282	si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
	283	for (block = 0; block < 10+1+1+1; block++)
	284	write3byte(sbi, (u8 *)&si->i_data[block],
	285	&raw_inode->i_data[3*block]);
	286	mark_buffer_dirty(bh);
05459ca8 AV	287	if (wait) {
	288	sync_dirty_buffer(bh);
	289	if (buffer_req(bh) && !buffer_uptodate(bh)) {
	290	printk ("IO error syncing sysv inode [%s:%08x]\n",
	291	sb->s_id, ino);
	292	err = -EIO;
	293	}
	294	}
1da177e4	295	brelse(bh);
1da177e4 LT	296	return 0;
	297	}
	298
05459ca8	299	int sysv_sync_inode(struct inode *inode)
1da177e4	300	{
05459ca8	301	return sysv_write_inode(inode, 1);
1da177e4 LT	302	}
	303
	304	static void sysv_delete_inode(struct inode *inode)
	305	{
fef26658	306	truncate_inode_pages(&inode->i_data, 0);
1da177e4 LT	307	inode->i_size = 0;
1da177e4 LT	308	sysv_truncate(inode);
1da177e4	309	sysv_free_inode(inode);
1da177e4 LT	310	}
1da177e4 LT	311
e18b890b	312	static struct kmem_cache *sysv_inode_cachep;
1da177e4 LT	313
	314	static struct inode sysv_alloc_inode(struct super_block sb)
	315	{
	316	struct sysv_inode_info *si;
	317
e94b1766	318	si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
1da177e4 LT	319	if (!si)
	320	return NULL;
	321	return &si->vfs_inode;
	322	}
	323
	324	static void sysv_destroy_inode(struct inode *inode)
	325	{
	326	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
	327	}
	328
51cc5068	329	static void init_once(void *p)
1da177e4 LT	330	{
	331	struct sysv_inode_info si = (struct sysv_inode_info )p;
	332
a35afb83	333	inode_init_once(&si->vfs_inode);
1da177e4 LT	334	}
1da177e4 LT	335
ee9b6d61	336	const struct super_operations sysv_sops = {
1da177e4 LT	337	.alloc_inode = sysv_alloc_inode,
1da177e4 LT	338	.destroy_inode = sysv_destroy_inode,
1da177e4 LT	339	.write_inode = sysv_write_inode,
	340	.delete_inode = sysv_delete_inode,
	341	.put_super = sysv_put_super,
	342	.write_super = sysv_write_super,
ad43ffde	343	.sync_fs = sysv_sync_fs,
1da177e4 LT	344	.remount_fs = sysv_remount,
	345	.statfs = sysv_statfs,
	346	};
	347
	348	int __init sysv_init_icache(void)
	349	{
	350	sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
	351	sizeof(struct sysv_inode_info), 0,
4b6a9316	352	SLAB_RECLAIM_ACCOUNT\|SLAB_MEM_SPREAD,
20c2df83	353	init_once);
1da177e4 LT	354	if (!sysv_inode_cachep)
	355	return -ENOMEM;
	356	return 0;
	357	}
	358
	359	void sysv_destroy_icache(void)
	360	{
	361	kmem_cache_destroy(sysv_inode_cachep);
	362	}