[linux-2.6-block.git] / fs / sysv / inode.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  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/writeback.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);
	u32 time = (u32)ktime_get_real_seconds(), old_time;

	mutex_lock(&sbi->s_lock);

	/*
	 * 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, 0x7c269d38u - old_time))
			*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38u - time);
		*sbi->s_sb_time = cpu_to_fs32(sbi, time);
		mark_buffer_dirty(sbi->s_bh2);
	}

	mutex_unlock(&sbi->s_lock);

	return 0;
}

static int sysv_remount(struct super_block *sb, int *flags, char *data)
{
	struct sysv_sb_info *sbi = SYSV_SB(sb);

	sync_filesystem(sb);
	if (sbi->s_forced_ro)
		*flags |= SB_RDONLY;
	return 0;
}

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

	if (!sb_rdonly(sb)) {
		/* 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 = u64_to_fsid(id);
	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 = {
	.get_link	= page_get_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)) {
		inode->i_op = &sysv_symlink_inode_operations;
		inode_nohighmem(inode);
		inode->i_mapping->a_ops = &sysv_aops;
	} 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);
	i_uid_write(inode, (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid));
	i_gid_write(inode, (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid));
	set_nlink(inode, 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_set_ctime(inode, fs32_to_cpu(sbi, raw_inode->i_ctime), 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 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(i_uid_read(inode)));
	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(i_gid_read(inode)));
	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_get_ctime(inode).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 err;
}

int sysv_write_inode(struct inode *inode, struct writeback_control *wbc)
{
	return __sysv_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
}

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

static void sysv_evict_inode(struct inode *inode)
{
	truncate_inode_pages_final(&inode->i_data);
	if (!inode->i_nlink) {
		inode->i_size = 0;
		sysv_truncate(inode);
	}
	invalidate_inode_buffers(inode);
	clear_inode(inode);
	if (!inode->i_nlink)
		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 = alloc_inode_sb(sb, sysv_inode_cachep, GFP_KERNEL);
	if (!si)
		return NULL;
	return &si->vfs_inode;
}

static void sysv_free_in_core_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,
	.free_inode	= sysv_free_in_core_inode,
	.write_inode	= sysv_write_inode,
	.evict_inode	= sysv_evict_inode,
	.put_super	= sysv_put_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|SLAB_ACCOUNT,
			init_once);
	if (!sysv_inode_cachep)
		return -ENOMEM;
	return 0;
}

void sysv_destroy_icache(void)
{
	/*
	 * Make sure all delayed rcu free inodes are flushed before we
	 * destroy cache.
	 */
	rcu_barrier();
	kmem_cache_destroy(sysv_inode_cachep);
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/fs/sysv/inode.c
	4	*
	5	* minix/inode.c
	6	* Copyright (C) 1991, 1992 Linus Torvalds
	7	*
	8	* xenix/inode.c
	9	* Copyright (C) 1992 Doug Evans
	10	*
	11	* coh/inode.c
	12	* Copyright (C) 1993 Pascal Haible, Bruno Haible
	13	*
	14	* sysv/inode.c
	15	* Copyright (C) 1993 Paul B. Monday
	16	*
	17	* sysv/inode.c
	18	* Copyright (C) 1993 Bruno Haible
	19	* Copyright (C) 1997, 1998 Krzysztof G. Baranowski
	20	*
	21	* This file contains code for allocating/freeing inodes and for read/writing
	22	* the superblock.
	23	*/
	24
1da177e4 LT	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>
a9185b41	30	#include <linux/writeback.h>
21acaf8e	31	#include <linux/namei.h>
1da177e4 LT	32	#include <asm/byteorder.h>
	33	#include "sysv.h"
	34
ad43ffde	35	static int sysv_sync_fs(struct super_block *sb, int wait)
1da177e4 LT	36	{
1da177e4 LT	37	struct sysv_sb_info *sbi = SYSV_SB(sb);
3e811f05	38	u32 time = (u32)ktime_get_real_seconds(), old_time;
1da177e4	39
c07cb01c	40	mutex_lock(&sbi->s_lock);
1da177e4 LT	41
	42	/*
	43	* If we are going to write out the super block,
	44	* then attach current time stamp.
	45	* But if the filesystem was marked clean, keep it clean.
	46	*/
	47	old_time = fs32_to_cpu(sbi, *sbi->s_sb_time);
	48	if (sbi->s_type == FSTYPE_SYSV4) {
3e811f05 AB	49	if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38u - old_time))
3e811f05 AB	50	*sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38u - time);
1da177e4 LT	51	*sbi->s_sb_time = cpu_to_fs32(sbi, time);
	52	mark_buffer_dirty(sbi->s_bh2);
	53	}
ad43ffde	54
c07cb01c	55	mutex_unlock(&sbi->s_lock);
ad43ffde CH	56
	57	return 0;
	58	}
	59
1da177e4 LT	60	static int sysv_remount(struct super_block sb, int flags, char *data)
	61	{
	62	struct sysv_sb_info *sbi = SYSV_SB(sb);
eee45893	63
02b9984d	64	sync_filesystem(sb);
1da177e4	65	if (sbi->s_forced_ro)
1751e8a6	66	*flags \|= SB_RDONLY;
1da177e4 LT	67	return 0;
	68	}
	69
	70	static void sysv_put_super(struct super_block *sb)
	71	{
	72	struct sysv_sb_info *sbi = SYSV_SB(sb);
	73
bc98a42c	74	if (!sb_rdonly(sb)) {
1da177e4 LT	75	/* XXX ext2 also updates the state here */
	76	mark_buffer_dirty(sbi->s_bh1);
	77	if (sbi->s_bh1 != sbi->s_bh2)
	78	mark_buffer_dirty(sbi->s_bh2);
	79	}
	80
	81	brelse(sbi->s_bh1);
	82	if (sbi->s_bh1 != sbi->s_bh2)
	83	brelse(sbi->s_bh2);
	84
	85	kfree(sbi);
	86	}
	87
726c3342	88	static int sysv_statfs(struct dentry dentry, struct kstatfs buf)
1da177e4	89	{
726c3342	90	struct super_block *sb = dentry->d_sb;
1da177e4	91	struct sysv_sb_info *sbi = SYSV_SB(sb);
1c5b4541	92	u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
1da177e4 LT	93
	94	buf->f_type = sb->s_magic;
	95	buf->f_bsize = sb->s_blocksize;
	96	buf->f_blocks = sbi->s_ndatazones;
	97	buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb);
	98	buf->f_files = sbi->s_ninodes;
	99	buf->f_ffree = sysv_count_free_inodes(sb);
	100	buf->f_namelen = SYSV_NAMELEN;
6d1349c7	101	buf->f_fsid = u64_to_fsid(id);
1da177e4 LT	102	return 0;
	103	}
	104
	105	/*
	106	* NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32
	107	*/
	108	static inline void read3byte(struct sysv_sb_info *sbi,
	109	unsigned char * from, unsigned char * to)
	110	{
	111	if (sbi->s_bytesex == BYTESEX_PDP) {
	112	to[0] = from[0];
	113	to[1] = 0;
	114	to[2] = from[1];
	115	to[3] = from[2];
	116	} else if (sbi->s_bytesex == BYTESEX_LE) {
	117	to[0] = from[0];
	118	to[1] = from[1];
	119	to[2] = from[2];
	120	to[3] = 0;
	121	} else {
	122	to[0] = 0;
	123	to[1] = from[0];
	124	to[2] = from[1];
	125	to[3] = from[2];
	126	}
	127	}
	128
	129	static inline void write3byte(struct sysv_sb_info *sbi,
	130	unsigned char * from, unsigned char * to)
	131	{
	132	if (sbi->s_bytesex == BYTESEX_PDP) {
	133	to[0] = from[0];
	134	to[1] = from[2];
	135	to[2] = from[3];
	136	} else if (sbi->s_bytesex == BYTESEX_LE) {
	137	to[0] = from[0];
	138	to[1] = from[1];
	139	to[2] = from[2];
	140	} else {
	141	to[0] = from[1];
	142	to[1] = from[2];
	143	to[2] = from[3];
	144	}
	145	}
	146
c5ef1c42	147	static const struct inode_operations sysv_symlink_inode_operations = {
6b255391	148	.get_link = page_get_link,
1da177e4 LT	149	.getattr = sysv_getattr,
	150	};
	151
	152	void sysv_set_inode(struct inode *inode, dev_t rdev)
	153	{
	154	if (S_ISREG(inode->i_mode)) {
	155	inode->i_op = &sysv_file_inode_operations;
	156	inode->i_fop = &sysv_file_operations;
	157	inode->i_mapping->a_ops = &sysv_aops;
	158	} else if (S_ISDIR(inode->i_mode)) {
	159	inode->i_op = &sysv_dir_inode_operations;
	160	inode->i_fop = &sysv_dir_operations;
	161	inode->i_mapping->a_ops = &sysv_aops;
	162	} else if (S_ISLNK(inode->i_mode)) {
0ebf7f10	163	inode->i_op = &sysv_symlink_inode_operations;
21fc61c7	164	inode_nohighmem(inode);
0ebf7f10	165	inode->i_mapping->a_ops = &sysv_aops;
1da177e4 LT	166	} else
	167	init_special_inode(inode, inode->i_mode, rdev);
	168	}
	169
b8e1343f	170	struct inode sysv_iget(struct super_block sb, unsigned int ino)
1da177e4	171	{
1da177e4 LT	172	struct sysv_sb_info * sbi = SYSV_SB(sb);
	173	struct buffer_head * bh;
	174	struct sysv_inode * raw_inode;
	175	struct sysv_inode_info * si;
b8e1343f DH	176	struct inode *inode;
b8e1343f DH	177	unsigned int block;
1da177e4 LT	178
	179	if (!ino \|\| ino > sbi->s_ninodes) {
	180	printk("Bad inode number on dev %s: %d is out of range\n",
b8e1343f DH	181	sb->s_id, ino);
b8e1343f DH	182	return ERR_PTR(-EIO);
1da177e4	183	}
b8e1343f DH	184
	185	inode = iget_locked(sb, ino);
	186	if (!inode)
	187	return ERR_PTR(-ENOMEM);
	188	if (!(inode->i_state & I_NEW))
	189	return inode;
	190
1da177e4 LT	191	raw_inode = sysv_raw_inode(sb, ino, &bh);
	192	if (!raw_inode) {
	193	printk("Major problem: unable to read inode from dev %s\n",
	194	inode->i_sb->s_id);
	195	goto bad_inode;
	196	}
	197	/* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */
	198	inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode);
a726ecce EB	199	i_uid_write(inode, (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid));
a726ecce EB	200	i_gid_write(inode, (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid));
bfe86848	201	set_nlink(inode, fs16_to_cpu(sbi, raw_inode->i_nlink));
1da177e4 LT	202	inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size);
	203	inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime);
	204	inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime);
c801b095	205	inode_set_ctime(inode, fs32_to_cpu(sbi, raw_inode->i_ctime), 0);
1da177e4 LT	206	inode->i_atime.tv_nsec = 0;
1da177e4 LT	207	inode->i_mtime.tv_nsec = 0;
ba52de12	208	inode->i_blocks = 0;
1da177e4 LT	209
	210	si = SYSV_I(inode);
	211	for (block = 0; block < 10+1+1+1; block++)
	212	read3byte(sbi, &raw_inode->i_data[3*block],
	213	(u8 *)&si->i_data[block]);
	214	brelse(bh);
	215	si->i_dir_start_lookup = 0;
	216	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	217	sysv_set_inode(inode,
	218	old_decode_dev(fs32_to_cpu(sbi, si->i_data[0])));
	219	else
	220	sysv_set_inode(inode, 0);
b8e1343f DH	221	unlock_new_inode(inode);
b8e1343f DH	222	return inode;
1da177e4 LT	223
1da177e4 LT	224	bad_inode:
b8e1343f DH	225	iget_failed(inode);
b8e1343f DH	226	return ERR_PTR(-EIO);
1da177e4 LT	227	}
1da177e4 LT	228
a9185b41	229	static int __sysv_write_inode(struct inode *inode, int wait)
1da177e4 LT	230	{
	231	struct super_block * sb = inode->i_sb;
	232	struct sysv_sb_info * sbi = SYSV_SB(sb);
	233	struct buffer_head * bh;
	234	struct sysv_inode * raw_inode;
	235	struct sysv_inode_info * si;
	236	unsigned int ino, block;
05459ca8	237	int err = 0;
1da177e4 LT	238
	239	ino = inode->i_ino;
	240	if (!ino \|\| ino > sbi->s_ninodes) {
	241	printk("Bad inode number on dev %s: %d is out of range\n",
	242	inode->i_sb->s_id, ino);
05459ca8	243	return -EIO;
1da177e4 LT	244	}
	245	raw_inode = sysv_raw_inode(sb, ino, &bh);
	246	if (!raw_inode) {
	247	printk("unable to read i-node block\n");
05459ca8	248	return -EIO;
1da177e4 LT	249	}
	250
	251	raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode);
a726ecce EB	252	raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(i_uid_read(inode)));
a726ecce EB	253	raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(i_gid_read(inode)));
1da177e4 LT	254	raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink);
	255	raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size);
	256	raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec);
	257	raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec);
c801b095	258	raw_inode->i_ctime = cpu_to_fs32(sbi, inode_get_ctime(inode).tv_sec);
1da177e4 LT	259
	260	si = SYSV_I(inode);
	261	if (S_ISCHR(inode->i_mode) \|\| S_ISBLK(inode->i_mode))
	262	si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev));
	263	for (block = 0; block < 10+1+1+1; block++)
	264	write3byte(sbi, (u8 *)&si->i_data[block],
	265	&raw_inode->i_data[3*block]);
	266	mark_buffer_dirty(bh);
05459ca8 AV	267	if (wait) {
	268	sync_dirty_buffer(bh);
	269	if (buffer_req(bh) && !buffer_uptodate(bh)) {
	270	printk ("IO error syncing sysv inode [%s:%08x]\n",
	271	sb->s_id, ino);
	272	err = -EIO;
	273	}
	274	}
1da177e4	275	brelse(bh);
c4b7d1ba	276	return err;
1da177e4 LT	277	}
1da177e4 LT	278
a9185b41 CH	279	int sysv_write_inode(struct inode inode, struct writeback_control wbc)
	280	{
	281	return __sysv_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
	282	}
	283
05459ca8	284	int sysv_sync_inode(struct inode *inode)
1da177e4	285	{
a9185b41	286	return __sysv_write_inode(inode, 1);
1da177e4 LT	287	}
1da177e4 LT	288
d299eadc	289	static void sysv_evict_inode(struct inode *inode)
1da177e4	290	{
91b0abe3	291	truncate_inode_pages_final(&inode->i_data);
d299eadc AV	292	if (!inode->i_nlink) {
	293	inode->i_size = 0;
	294	sysv_truncate(inode);
	295	}
	296	invalidate_inode_buffers(inode);
dbd5768f	297	clear_inode(inode);
d299eadc AV	298	if (!inode->i_nlink)
d299eadc AV	299	sysv_free_inode(inode);
1da177e4 LT	300	}
1da177e4 LT	301
e18b890b	302	static struct kmem_cache *sysv_inode_cachep;
1da177e4 LT	303
	304	static struct inode sysv_alloc_inode(struct super_block sb)
	305	{
	306	struct sysv_inode_info *si;
	307
fd60b288	308	si = alloc_inode_sb(sb, sysv_inode_cachep, GFP_KERNEL);
1da177e4 LT	309	if (!si)
	310	return NULL;
	311	return &si->vfs_inode;
	312	}
	313
6becf8ed	314	static void sysv_free_in_core_inode(struct inode *inode)
1da177e4 LT	315	{
	316	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
	317	}
	318
51cc5068	319	static void init_once(void *p)
1da177e4 LT	320	{
	321	struct sysv_inode_info si = (struct sysv_inode_info )p;
	322
a35afb83	323	inode_init_once(&si->vfs_inode);
1da177e4 LT	324	}
1da177e4 LT	325
ee9b6d61	326	const struct super_operations sysv_sops = {
1da177e4	327	.alloc_inode = sysv_alloc_inode,
6becf8ed	328	.free_inode = sysv_free_in_core_inode,
1da177e4	329	.write_inode = sysv_write_inode,
d299eadc	330	.evict_inode = sysv_evict_inode,
1da177e4	331	.put_super = sysv_put_super,
ad43ffde	332	.sync_fs = sysv_sync_fs,
1da177e4 LT	333	.remount_fs = sysv_remount,
	334	.statfs = sysv_statfs,
	335	};
	336
	337	int __init sysv_init_icache(void)
	338	{
	339	sysv_inode_cachep = kmem_cache_create("sysv_inode_cache",
	340	sizeof(struct sysv_inode_info), 0,
5d097056	341	SLAB_RECLAIM_ACCOUNT\|SLAB_MEM_SPREAD\|SLAB_ACCOUNT,
20c2df83	342	init_once);
1da177e4 LT	343	if (!sysv_inode_cachep)
	344	return -ENOMEM;
	345	return 0;
	346	}
	347
	348	void sysv_destroy_icache(void)
	349	{
8c0a8537 KS	350	/*
	351	* Make sure all delayed rcu free inodes are flushed before we
	352	* destroy cache.
	353	*/
	354	rcu_barrier();
1da177e4 LT	355	kmem_cache_destroy(sysv_inode_cachep);
1da177e4 LT	356	}