[mirror_ubuntu-bionic-kernel.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/smp_lock.h>
#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"

/* This is only called on sync() and umount(), when s_dirt=1. */
static void sysv_write_super(struct super_block *sb)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);
	unsigned long time = get_seconds(), old_time;

	lock_kernel();
	if (sb->s_flags & MS_RDONLY)
		goto clean;

	/*
	 * 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);
	}
clean:
	sb->s_dirt = 0;
	unlock_kernel();
}

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

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

static struct buffer_head * sysv_update_inode(struct inode * inode)
{
	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;

	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 NULL;
	}
	raw_inode = sysv_raw_inode(sb, ino, &bh);
	if (!raw_inode) {
		printk("unable to read i-node block\n");
		return NULL;
	}

	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);
	return bh;
}

int sysv_write_inode(struct inode * inode, int wait)
{
	struct buffer_head *bh;
	lock_kernel();
	bh = sysv_update_inode(inode);
	brelse(bh);
	unlock_kernel();
	return 0;
}

int sysv_sync_inode(struct inode * inode)
{
        int err = 0;
        struct buffer_head *bh;

        bh = sysv_update_inode(inode);
        if (bh && buffer_dirty(bh)) {
                sync_dirty_buffer(bh);
                if (buffer_req(bh) && !buffer_uptodate(bh)) {
                        printk ("IO error syncing sysv inode [%s:%08lx]\n",
                                inode->i_sb->s_id, inode->i_ino);
                        err = -1;
                }
        }
        else if (!bh)
                err = -1;
        brelse (bh);
        return err;
}

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

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,
	.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
	24	#include <linux/smp_lock.h>
	25	#include <linux/highuid.h>
	26	#include <linux/slab.h>
	27	#include <linux/init.h>
	28	#include <linux/buffer_head.h>
	29	#include <linux/vfs.h>
21acaf8e	30	#include <linux/namei.h>
1da177e4 LT	31	#include <asm/byteorder.h>
	32	#include "sysv.h"
	33
	34	/* This is only called on sync() and umount(), when s_dirt=1. */
	35	static void sysv_write_super(struct super_block *sb)
	36	{
	37	struct sysv_sb_info *sbi = SYSV_SB(sb);
	38	unsigned long time = get_seconds(), old_time;
	39
	40	lock_kernel();
	41	if (sb->s_flags & MS_RDONLY)
	42	goto clean;
	43
	44	/*
	45	* If we are going to write out the super block,
	46	* then attach current time stamp.
	47	* But if the filesystem was marked clean, keep it clean.
	48	*/
	49	old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
	50	if (sbi->s_type == FSTYPE_SYSV4) {
	51	if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time))
	52	*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time);
	53	*sbi->s_sb_time = cpu_to_fs32(sbi, time);
	54	mark_buffer_dirty(sbi->s_bh2);
	55	}
	56	clean:
	57	sb->s_dirt = 0;
	58	unlock_kernel();
	59	}
	60
	61	static int sysv_remount(struct super_block sb, int flags, char *data)
	62	{
	63	struct sysv_sb_info *sbi = SYSV_SB(sb);
	64	if (sbi->s_forced_ro)
	65	*flags \|= MS_RDONLY;
	66	if (!(*flags & MS_RDONLY))
	67	sb->s_dirt = 1;
	68	return 0;
	69	}
	70
	71	static void sysv_put_super(struct super_block *sb)
	72	{
	73	struct sysv_sb_info *sbi = SYSV_SB(sb);
	74
	75	if (!(sb->s_flags & MS_RDONLY)) {
	76	/* XXX ext2 also updates the state here */
	77	mark_buffer_dirty(sbi->s_bh1);
	78	if (sbi->s_bh1 != sbi->s_bh2)
	79	mark_buffer_dirty(sbi->s_bh2);
	80	}
	81
	82	brelse(sbi->s_bh1);
	83	if (sbi->s_bh1 != sbi->s_bh2)
	84	brelse(sbi->s_bh2);
	85
	86	kfree(sbi);
	87	}
	88
726c3342	89	static int sysv_statfs(struct dentry dentry, struct kstatfs buf)
1da177e4	90	{
726c3342	91	struct super_block *sb = dentry->d_sb;
1da177e4	92	struct sysv_sb_info *sbi = SYSV_SB(sb);
1c5b4541	93	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1da177e4 LT	94
	95	buf->f_type = sb->s_magic;
	96	buf->f_bsize = sb->s_blocksize;
	97	buf->f_blocks = sbi->s_ndatazones;
	98	buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
	99	buf->f_files = sbi->s_ninodes;
	100	buf->f_ffree = sysv_count_free_inodes(sb);
	101	buf->f_namelen = SYSV_NAMELEN;
1c5b4541 CL	102	buf->f_fsid.val[0] = (u32)id;
1c5b4541 CL	103	buf->f_fsid.val[1] = (u32)(id >> 32);
1da177e4 LT	104	return 0;
	105	}
	106
	107	/*
	108	* NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
	109	*/
	110	static inline void read3byte(struct sysv_sb_info *sbi,
	111	unsigned char * from, unsigned char * to)
	112	{
	113	if (sbi->s_bytesex == BYTESEX_PDP) {
	114	to[0] = from[0];
	115	to[1] = 0;
	116	to[2] = from[1];
	117	to[3] = from[2];
	118	} else if (sbi->s_bytesex == BYTESEX_LE) {
	119	to[0] = from[0];
	120	to[1] = from[1];
	121	to[2] = from[2];
	122	to[3] = 0;
	123	} else {
	124	to[0] = 0;
	125	to[1] = from[0];
	126	to[2] = from[1];
	127	to[3] = from[2];
	128	}
	129	}
	130
	131	static inline void write3byte(struct sysv_sb_info *sbi,
	132	unsigned char * from, unsigned char * to)
	133	{
	134	if (sbi->s_bytesex == BYTESEX_PDP) {
	135	to[0] = from[0];
	136	to[1] = from[2];
	137	to[2] = from[3];
	138	} else if (sbi->s_bytesex == BYTESEX_LE) {
	139	to[0] = from[0];
	140	to[1] = from[1];
	141	to[2] = from[2];
	142	} else {
	143	to[0] = from[1];
	144	to[1] = from[2];
	145	to[2] = from[3];
	146	}
	147	}
	148
c5ef1c42	149	static const struct inode_operations sysv_symlink_inode_operations = {
1da177e4 LT	150	.readlink = generic_readlink,
	151	.follow_link = page_follow_link_light,
	152	.put_link = page_put_link,
	153	.getattr = sysv_getattr,
	154	};
	155
	156	void sysv_set_inode(struct inode *inode, dev_t rdev)
	157	{
	158	if (S_ISREG(inode->i_mode)) {
	159	inode->i_op = &sysv_file_inode_operations;
	160	inode->i_fop = &sysv_file_operations;
	161	inode->i_mapping->a_ops = &sysv_aops;
	162	} else if (S_ISDIR(inode->i_mode)) {
	163	inode->i_op = &sysv_dir_inode_operations;
	164	inode->i_fop = &sysv_dir_operations;
	165	inode->i_mapping->a_ops = &sysv_aops;
	166	} else if (S_ISLNK(inode->i_mode)) {
	167	if (inode->i_blocks) {
	168	inode->i_op = &sysv_symlink_inode_operations;
	169	inode->i_mapping->a_ops = &sysv_aops;
21acaf8e	170	} else {
1da177e4	171	inode->i_op = &sysv_fast_symlink_inode_operations;
21acaf8e DG	172	nd_terminate_link(SYSV_I(inode)->i_data, inode->i_size,
	173	sizeof(SYSV_I(inode)->i_data) - 1);
	174	}
1da177e4 LT	175	} else
	176	init_special_inode(inode, inode->i_mode, rdev);
	177	}
	178
b8e1343f	179	struct inode sysv_iget(struct super_block sb, unsigned int ino)
1da177e4	180	{
1da177e4 LT	181	struct sysv_sb_info * sbi = SYSV_SB(sb);
	182	struct buffer_head * bh;
	183	struct sysv_inode * raw_inode;
	184	struct sysv_inode_info * si;
b8e1343f DH	185	struct inode *inode;
b8e1343f DH	186	unsigned int block;
1da177e4 LT	187
	188	if (!ino \|\| ino > sbi->s_ninodes) {
	189	printk("Bad inode number on dev %s: %d is out of range\n",
b8e1343f DH	190	sb->s_id, ino);
b8e1343f DH	191	return ERR_PTR(-EIO);
1da177e4	192	}
b8e1343f DH	193
	194	inode = iget_locked(sb, ino);
	195	if (!inode)
	196	return ERR_PTR(-ENOMEM);
	197	if (!(inode->i_state & I_NEW))
	198	return inode;
	199
1da177e4 LT	200	raw_inode = sysv_raw_inode(sb, ino, &bh);
	201	if (!raw_inode) {
	202	printk("Major problem: unable to read inode from dev %s\n",
	203	inode->i_sb->s_id);
	204	goto bad_inode;
	205	}
	206	/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
	207	inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
	208	inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid);
	209	inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid);
	210	inode->i_nlink = fs16_to_cpu(sbi, raw_inode->i_nlink);
	211	inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
	212	inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
	213	inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
	214	inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime);
	215	inode->i_ctime.tv_nsec = 0;
	216	inode->i_atime.tv_nsec = 0;
	217	inode->i_mtime.tv_nsec = 0;
ba52de12	218	inode->i_blocks = 0;
1da177e4 LT	219
	220	si = SYSV_I(inode);
	221	for (block = 0; block < 10+1+1+1; block++)
	222	read3byte(sbi, &raw_inode->i_data[3*block],
	223	(u8 *)&si->i_data[block]);
	224	brelse(bh);
	225	si->i_dir_start_lookup = 0;
	226	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	227	sysv_set_inode(inode,
	228	old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
	229	else
	230	sysv_set_inode(inode, 0);
b8e1343f DH	231	unlock_new_inode(inode);
b8e1343f DH	232	return inode;
1da177e4 LT	233
1da177e4 LT	234	bad_inode:
b8e1343f DH	235	iget_failed(inode);
b8e1343f DH	236	return ERR_PTR(-EIO);
1da177e4 LT	237	}
	238
	239	static struct buffer_head * sysv_update_inode(struct inode * inode)
	240	{
	241	struct super_block * sb = inode->i_sb;
	242	struct sysv_sb_info * sbi = SYSV_SB(sb);
	243	struct buffer_head * bh;
	244	struct sysv_inode * raw_inode;
	245	struct sysv_inode_info * si;
	246	unsigned int ino, block;
	247
	248	ino = inode->i_ino;
	249	if (!ino \|\| ino > sbi->s_ninodes) {
	250	printk("Bad inode number on dev %s: %d is out of range\n",
	251	inode->i_sb->s_id, ino);
	252	return NULL;
	253	}
	254	raw_inode = sysv_raw_inode(sb, ino, &bh);
	255	if (!raw_inode) {
	256	printk("unable to read i-node block\n");
	257	return NULL;
	258	}
	259
	260	raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
	261	raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(inode->i_uid));
	262	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(inode->i_gid));
	263	raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
	264	raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
	265	raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
	266	raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
	267	raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec);
	268
	269	si = SYSV_I(inode);
	270	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	271	si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
	272	for (block = 0; block < 10+1+1+1; block++)
	273	write3byte(sbi, (u8 *)&si->i_data[block],
	274	&raw_inode->i_data[3*block]);
	275	mark_buffer_dirty(bh);
	276	return bh;
	277	}
	278
	279	int sysv_write_inode(struct inode * inode, int wait)
	280	{
	281	struct buffer_head *bh;
	282	lock_kernel();
	283	bh = sysv_update_inode(inode);
	284	brelse(bh);
	285	unlock_kernel();
	286	return 0;
	287	}
	288
	289	int sysv_sync_inode(struct inode * inode)
	290	{
	291	int err = 0;
	292	struct buffer_head *bh;
	293
	294	bh = sysv_update_inode(inode);
	295	if (bh && buffer_dirty(bh)) {
	296	sync_dirty_buffer(bh);
	297	if (buffer_req(bh) && !buffer_uptodate(bh)) {
	298	printk ("IO error syncing sysv inode [%s:%08lx]\n",
	299	inode->i_sb->s_id, inode->i_ino);
	300	err = -1;
301	}
302	}
303	else if (!bh)
304	err = -1;
305	brelse (bh);
306	return err;
307	}
308
309	static void sysv_delete_inode(struct inode *inode)
310	{
fef26658	311	truncate_inode_pages(&inode->i_data, 0);
1da177e4 LT	312	inode->i_size = 0;
	313	sysv_truncate(inode);
	314	lock_kernel();
	315	sysv_free_inode(inode);
	316	unlock_kernel();
	317	}
	318
e18b890b	319	static struct kmem_cache *sysv_inode_cachep;
1da177e4 LT	320
	321	static struct inode sysv_alloc_inode(struct super_block sb)
	322	{
	323	struct sysv_inode_info *si;
	324
e94b1766	325	si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL);
1da177e4 LT	326	if (!si)
	327	return NULL;
	328	return &si->vfs_inode;
	329	}
	330
	331	static void sysv_destroy_inode(struct inode *inode)
	332	{
	333	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
	334	}
	335
51cc5068	336	static void init_once(void *p)
1da177e4 LT	337	{
	338	struct sysv_inode_info si = (struct sysv_inode_info )p;
	339
a35afb83	340	inode_init_once(&si->vfs_inode);
1da177e4 LT	341	}
1da177e4 LT	342
ee9b6d61	343	const struct super_operations sysv_sops = {
1da177e4 LT	344	.alloc_inode = sysv_alloc_inode,
1da177e4 LT	345	.destroy_inode = sysv_destroy_inode,
1da177e4 LT	346	.write_inode = sysv_write_inode,
	347	.delete_inode = sysv_delete_inode,
	348	.put_super = sysv_put_super,
	349	.write_super = sysv_write_super,
	350	.remount_fs = sysv_remount,
	351	.statfs = sysv_statfs,
	352	};
	353
	354	int __init sysv_init_icache(void)
	355	{
	356	sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
	357	sizeof(struct sysv_inode_info), 0,
4b6a9316	358	SLAB_RECLAIM_ACCOUNT\|SLAB_MEM_SPREAD,
20c2df83	359	init_once);
1da177e4 LT	360	if (!sysv_inode_cachep)
	361	return -ENOMEM;
	362	return 0;
	363	}
	364
	365	void sysv_destroy_icache(void)
	366	{
	367	kmem_cache_destroy(sysv_inode_cachep);
	368	}