[deliverable/linux.git] / fs / affs / inode.c

/*
 *  linux/fs/affs/inode.c
 *
 *  (c) 1996  Hans-Joachim Widmaier - Rewritten
 *
 *  (C) 1993  Ray Burr - Modified for Amiga FFS filesystem.
 *
 *  (C) 1992  Eric Youngdale Modified for ISO9660 filesystem.
 *
 *  (C) 1991  Linus Torvalds - minix filesystem
 */
#include <linux/sched.h>
#include "affs.h"

extern const struct inode_operations affs_symlink_inode_operations;
extern struct timezone sys_tz;

struct inode *affs_iget(struct super_block *sb, unsigned long ino)
{
	struct affs_sb_info	*sbi = AFFS_SB(sb);
	struct buffer_head	*bh;
	struct affs_head	*head;
	struct affs_tail	*tail;
	struct inode		*inode;
	u32			 block;
	u32			 size;
	u32			 prot;
	u16			 id;

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

	pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);

	block = inode->i_ino;
	bh = affs_bread(sb, block);
	if (!bh) {
		affs_warning(sb, "read_inode", "Cannot read block %d", block);
		goto bad_inode;
	}
	if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
		affs_warning(sb,"read_inode",
			   "Checksum or type (ptype=%d) error on inode %d",
			   AFFS_HEAD(bh)->ptype, block);
		goto bad_inode;
	}

	head = AFFS_HEAD(bh);
	tail = AFFS_TAIL(sb, bh);
	prot = be32_to_cpu(tail->protect);

	inode->i_size = 0;
	inode->i_nlink = 1;
	inode->i_mode = 0;
	AFFS_I(inode)->i_extcnt = 1;
	AFFS_I(inode)->i_ext_last = ~1;
	AFFS_I(inode)->i_protect = prot;
	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
	AFFS_I(inode)->i_blkcnt = 0;
	AFFS_I(inode)->i_lc = NULL;
	AFFS_I(inode)->i_lc_size = 0;
	AFFS_I(inode)->i_lc_shift = 0;
	AFFS_I(inode)->i_lc_mask = 0;
	AFFS_I(inode)->i_ac = NULL;
	AFFS_I(inode)->i_ext_bh = NULL;
	AFFS_I(inode)->mmu_private = 0;
	AFFS_I(inode)->i_lastalloc = 0;
	AFFS_I(inode)->i_pa_cnt = 0;

	if (sbi->s_flags & SF_SETMODE)
		inode->i_mode = sbi->s_mode;
	else
		inode->i_mode = prot_to_mode(prot);

	id = be16_to_cpu(tail->uid);
	if (id == 0 || sbi->s_flags & SF_SETUID)
		inode->i_uid = sbi->s_uid;
	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
		inode->i_uid = 0;
	else
		inode->i_uid = id;

	id = be16_to_cpu(tail->gid);
	if (id == 0 || sbi->s_flags & SF_SETGID)
		inode->i_gid = sbi->s_gid;
	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
		inode->i_gid = 0;
	else
		inode->i_gid = id;

	switch (be32_to_cpu(tail->stype)) {
	case ST_ROOT:
		inode->i_uid = sbi->s_uid;
		inode->i_gid = sbi->s_gid;
		/* fall through */
	case ST_USERDIR:
		if (be32_to_cpu(tail->stype) == ST_USERDIR ||
		    sbi->s_flags & SF_SETMODE) {
			if (inode->i_mode & S_IRUSR)
				inode->i_mode |= S_IXUSR;
			if (inode->i_mode & S_IRGRP)
				inode->i_mode |= S_IXGRP;
			if (inode->i_mode & S_IROTH)
				inode->i_mode |= S_IXOTH;
			inode->i_mode |= S_IFDIR;
		} else
			inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR;
		/* Maybe it should be controlled by mount parameter? */
		//inode->i_mode |= S_ISVTX;
		inode->i_op = &affs_dir_inode_operations;
		inode->i_fop = &affs_dir_operations;
		break;
	case ST_LINKDIR:
#if 0
		affs_warning(sb, "read_inode", "inode is LINKDIR");
		goto bad_inode;
#else
		inode->i_mode |= S_IFDIR;
		inode->i_op = NULL;
		inode->i_fop = NULL;
		break;
#endif
	case ST_LINKFILE:
		affs_warning(sb, "read_inode", "inode is LINKFILE");
		goto bad_inode;
	case ST_FILE:
		size = be32_to_cpu(tail->size);
		inode->i_mode |= S_IFREG;
		AFFS_I(inode)->mmu_private = inode->i_size = size;
		if (inode->i_size) {
			AFFS_I(inode)->i_blkcnt = (size - 1) /
					       sbi->s_data_blksize + 1;
			AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
					       sbi->s_hashsize + 1;
		}
		if (tail->link_chain)
			inode->i_nlink = 2;
		inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
		inode->i_op = &affs_file_inode_operations;
		inode->i_fop = &affs_file_operations;
		break;
	case ST_SOFTLINK:
		inode->i_mode |= S_IFLNK;
		inode->i_op = &affs_symlink_inode_operations;
		inode->i_data.a_ops = &affs_symlink_aops;
		break;
	}

	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
		       = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
		         be32_to_cpu(tail->change.mins) * 60 +
			 be32_to_cpu(tail->change.ticks) / 50 +
			 ((8 * 365 + 2) * 24 * 60 * 60)) +
			 sys_tz.tz_minuteswest * 60;
	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	affs_brelse(bh);
	unlock_new_inode(inode);
	return inode;

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

int
affs_write_inode(struct inode *inode, int unused)
{
	struct super_block	*sb = inode->i_sb;
	struct buffer_head	*bh;
	struct affs_tail	*tail;
	uid_t			 uid;
	gid_t			 gid;

	pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);

	if (!inode->i_nlink)
		// possibly free block
		return 0;
	bh = affs_bread(sb, inode->i_ino);
	if (!bh) {
		affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
		return -EIO;
	}
	tail = AFFS_TAIL(sb, bh);
	if (tail->stype == cpu_to_be32(ST_ROOT)) {
		secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
	} else {
		tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
		tail->size = cpu_to_be32(inode->i_size);
		secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
		if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
			uid = inode->i_uid;
			gid = inode->i_gid;
			if (AFFS_SB(sb)->s_flags & SF_MUFS) {
				if (inode->i_uid == 0 || inode->i_uid == 0xFFFF)
					uid = inode->i_uid ^ ~0;
				if (inode->i_gid == 0 || inode->i_gid == 0xFFFF)
					gid = inode->i_gid ^ ~0;
			}
			if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
				tail->uid = cpu_to_be16(uid);
			if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
				tail->gid = cpu_to_be16(gid);
		}
	}
	affs_fix_checksum(sb, bh);
	mark_buffer_dirty_inode(bh, inode);
	affs_brelse(bh);
	affs_free_prealloc(inode);
	return 0;
}

int
affs_notify_change(struct dentry *dentry, struct iattr *attr)
{
	struct inode *inode = dentry->d_inode;
	int error;

	pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);

	error = inode_change_ok(inode,attr);
	if (error)
		goto out;

	if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) ||
	    ((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) ||
	    ((attr->ia_valid & ATTR_MODE) &&
	     (AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE | SF_IMMUTABLE)))) {
		if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
			error = -EPERM;
		goto out;
	}

	error = inode_setattr(inode, attr);
	if (!error && (attr->ia_valid & ATTR_MODE))
		mode_to_prot(inode);
out:
	return error;
}

void
affs_delete_inode(struct inode *inode)
{
	pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
	truncate_inode_pages(&inode->i_data, 0);
	inode->i_size = 0;
	affs_truncate(inode);
	clear_inode(inode);
	affs_free_block(inode->i_sb, inode->i_ino);
}

void
affs_clear_inode(struct inode *inode)
{
	unsigned long cache_page;

	pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);

	affs_free_prealloc(inode);
	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
	if (cache_page) {
		pr_debug("AFFS: freeing ext cache\n");
		AFFS_I(inode)->i_lc = NULL;
		AFFS_I(inode)->i_ac = NULL;
		free_page(cache_page);
	}
	affs_brelse(AFFS_I(inode)->i_ext_bh);
	AFFS_I(inode)->i_ext_last = ~1;
	AFFS_I(inode)->i_ext_bh = NULL;
}

struct inode *
affs_new_inode(struct inode *dir)
{
	struct super_block	*sb = dir->i_sb;
	struct inode		*inode;
	u32			 block;
	struct buffer_head	*bh;

	if (!(inode = new_inode(sb)))
		goto err_inode;

	if (!(block = affs_alloc_block(dir, dir->i_ino)))
		goto err_block;

	bh = affs_getzeroblk(sb, block);
	if (!bh)
		goto err_bh;
	mark_buffer_dirty_inode(bh, inode);
	affs_brelse(bh);

	inode->i_uid     = current->fsuid;
	inode->i_gid     = current->fsgid;
	inode->i_ino     = block;
	inode->i_nlink   = 1;
	inode->i_mtime   = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
	AFFS_I(inode)->i_blkcnt = 0;
	AFFS_I(inode)->i_lc = NULL;
	AFFS_I(inode)->i_lc_size = 0;
	AFFS_I(inode)->i_lc_shift = 0;
	AFFS_I(inode)->i_lc_mask = 0;
	AFFS_I(inode)->i_ac = NULL;
	AFFS_I(inode)->i_ext_bh = NULL;
	AFFS_I(inode)->mmu_private = 0;
	AFFS_I(inode)->i_protect = 0;
	AFFS_I(inode)->i_lastalloc = 0;
	AFFS_I(inode)->i_pa_cnt = 0;
	AFFS_I(inode)->i_extcnt = 1;
	AFFS_I(inode)->i_ext_last = ~1;

	insert_inode_hash(inode);

	return inode;

err_bh:
	affs_free_block(sb, block);
err_block:
	iput(inode);
err_inode:
	return NULL;
}

/*
 * Add an entry to a directory. Create the header block
 * and insert it into the hash table.
 */

int
affs_add_entry(struct inode *dir, struct inode *inode, struct dentry *dentry, s32 type)
{
	struct super_block *sb = dir->i_sb;
	struct buffer_head *inode_bh = NULL;
	struct buffer_head *bh = NULL;
	u32 block = 0;
	int retval;

	pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
	         (u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);

	retval = -EIO;
	bh = affs_bread(sb, inode->i_ino);
	if (!bh)
		goto done;

	affs_lock_link(inode);
	switch (type) {
	case ST_LINKFILE:
	case ST_LINKDIR:
		retval = -ENOSPC;
		block = affs_alloc_block(dir, dir->i_ino);
		if (!block)
			goto err;
		retval = -EIO;
		inode_bh = bh;
		bh = affs_getzeroblk(sb, block);
		if (!bh)
			goto err;
		break;
	default:
		break;
	}

	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);

	if (inode_bh) {
		__be32 chain;
	       	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
		AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
		AFFS_TAIL(sb, bh)->link_chain = chain;
		AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
		affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
		mark_buffer_dirty_inode(inode_bh, inode);
		inode->i_nlink = 2;
		atomic_inc(&inode->i_count);
	}
	affs_fix_checksum(sb, bh);
	mark_buffer_dirty_inode(bh, inode);
	dentry->d_fsdata = (void *)(long)bh->b_blocknr;

	affs_lock_dir(dir);
	retval = affs_insert_hash(dir, bh);
	mark_buffer_dirty_inode(bh, inode);
	affs_unlock_dir(dir);
	affs_unlock_link(inode);

	d_instantiate(dentry, inode);
done:
	affs_brelse(inode_bh);
	affs_brelse(bh);
	return retval;
err:
	if (block)
		affs_free_block(sb, block);
	affs_unlock_link(inode);
	goto done;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/affs/inode.c
	3	*
	4	* (c) 1996 Hans-Joachim Widmaier - Rewritten
	5	*
	6	* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
	7	*
	8	* (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
	9	*
	10	* (C) 1991 Linus Torvalds - minix filesystem
	11	*/
e8edc6e0	12	#include <linux/sched.h>
1da177e4 LT	13	#include "affs.h"
1da177e4 LT	14
754661f1	15	extern const struct inode_operations affs_symlink_inode_operations;
1da177e4 LT	16	extern struct timezone sys_tz;
1da177e4 LT	17
210f8559	18	struct inode affs_iget(struct super_block sb, unsigned long ino)
1da177e4	19	{
1da177e4 LT	20	struct affs_sb_info *sbi = AFFS_SB(sb);
	21	struct buffer_head *bh;
	22	struct affs_head *head;
	23	struct affs_tail *tail;
210f8559	24	struct inode *inode;
1da177e4 LT	25	u32 block;
	26	u32 size;
	27	u32 prot;
	28	u16 id;
	29
210f8559 DH	30	inode = iget_locked(sb, ino);
	31	if (!inode)
	32	return ERR_PTR(-ENOMEM);
	33	if (!(inode->i_state & I_NEW))
	34	return inode;
	35
	36	pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
1da177e4 LT	37
	38	block = inode->i_ino;
	39	bh = affs_bread(sb, block);
	40	if (!bh) {
	41	affs_warning(sb, "read_inode", "Cannot read block %d", block);
	42	goto bad_inode;
	43	}
	44	if (affs_checksum_block(sb, bh) \|\| be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
	45	affs_warning(sb,"read_inode",
	46	"Checksum or type (ptype=%d) error on inode %d",
	47	AFFS_HEAD(bh)->ptype, block);
	48	goto bad_inode;
	49	}
	50
	51	head = AFFS_HEAD(bh);
	52	tail = AFFS_TAIL(sb, bh);
	53	prot = be32_to_cpu(tail->protect);
	54
	55	inode->i_size = 0;
	56	inode->i_nlink = 1;
	57	inode->i_mode = 0;
	58	AFFS_I(inode)->i_extcnt = 1;
	59	AFFS_I(inode)->i_ext_last = ~1;
	60	AFFS_I(inode)->i_protect = prot;
dca3c336	61	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	62	AFFS_I(inode)->i_blkcnt = 0;
	63	AFFS_I(inode)->i_lc = NULL;
	64	AFFS_I(inode)->i_lc_size = 0;
	65	AFFS_I(inode)->i_lc_shift = 0;
	66	AFFS_I(inode)->i_lc_mask = 0;
	67	AFFS_I(inode)->i_ac = NULL;
	68	AFFS_I(inode)->i_ext_bh = NULL;
	69	AFFS_I(inode)->mmu_private = 0;
	70	AFFS_I(inode)->i_lastalloc = 0;
	71	AFFS_I(inode)->i_pa_cnt = 0;
	72
	73	if (sbi->s_flags & SF_SETMODE)
	74	inode->i_mode = sbi->s_mode;
	75	else
	76	inode->i_mode = prot_to_mode(prot);
	77
	78	id = be16_to_cpu(tail->uid);
	79	if (id == 0 \|\| sbi->s_flags & SF_SETUID)
	80	inode->i_uid = sbi->s_uid;
	81	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
	82	inode->i_uid = 0;
	83	else
	84	inode->i_uid = id;
	85
	86	id = be16_to_cpu(tail->gid);
	87	if (id == 0 \|\| sbi->s_flags & SF_SETGID)
	88	inode->i_gid = sbi->s_gid;
	89	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
	90	inode->i_gid = 0;
	91	else
	92	inode->i_gid = id;
	93
	94	switch (be32_to_cpu(tail->stype)) {
	95	case ST_ROOT:
	96	inode->i_uid = sbi->s_uid;
	97	inode->i_gid = sbi->s_gid;
	98	/* fall through */
	99	case ST_USERDIR:
	100	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
	101	sbi->s_flags & SF_SETMODE) {
	102	if (inode->i_mode & S_IRUSR)
	103	inode->i_mode \|= S_IXUSR;
	104	if (inode->i_mode & S_IRGRP)
	105	inode->i_mode \|= S_IXGRP;
	106	if (inode->i_mode & S_IROTH)
	107	inode->i_mode \|= S_IXOTH;
	108	inode->i_mode \|= S_IFDIR;
	109	} else
	110	inode->i_mode = S_IRUGO \| S_IXUGO \| S_IWUSR \| S_IFDIR;
1da177e4 LT	111	/* Maybe it should be controlled by mount parameter? */
	112	//inode->i_mode \|= S_ISVTX;
	113	inode->i_op = &affs_dir_inode_operations;
	114	inode->i_fop = &affs_dir_operations;
	115	break;
	116	case ST_LINKDIR:
	117	#if 0
	118	affs_warning(sb, "read_inode", "inode is LINKDIR");
	119	goto bad_inode;
	120	#else
	121	inode->i_mode \|= S_IFDIR;
	122	inode->i_op = NULL;
	123	inode->i_fop = NULL;
	124	break;
	125	#endif
	126	case ST_LINKFILE:
	127	affs_warning(sb, "read_inode", "inode is LINKFILE");
	128	goto bad_inode;
	129	case ST_FILE:
	130	size = be32_to_cpu(tail->size);
	131	inode->i_mode \|= S_IFREG;
	132	AFFS_I(inode)->mmu_private = inode->i_size = size;
	133	if (inode->i_size) {
	134	AFFS_I(inode)->i_blkcnt = (size - 1) /
	135	sbi->s_data_blksize + 1;
	136	AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
	137	sbi->s_hashsize + 1;
	138	}
	139	if (tail->link_chain)
	140	inode->i_nlink = 2;
	141	inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
	142	inode->i_op = &affs_file_inode_operations;
	143	inode->i_fop = &affs_file_operations;
	144	break;
	145	case ST_SOFTLINK:
	146	inode->i_mode \|= S_IFLNK;
	147	inode->i_op = &affs_symlink_inode_operations;
	148	inode->i_data.a_ops = &affs_symlink_aops;
	149	break;
	150	}
	151
	152	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
	153	= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
	154	be32_to_cpu(tail->change.mins) * 60 +
	155	be32_to_cpu(tail->change.ticks) / 50 +
	156	((8 * 365 + 2) * 24 * 60 * 60)) +
	157	sys_tz.tz_minuteswest * 60;
	158	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	159	affs_brelse(bh);
210f8559 DH	160	unlock_new_inode(inode);
210f8559 DH	161	return inode;
1da177e4 LT	162
1da177e4 LT	163	bad_inode:
1da177e4	164	affs_brelse(bh);
210f8559 DH	165	iget_failed(inode);
210f8559 DH	166	return ERR_PTR(-EIO);
1da177e4 LT	167	}
	168
	169	int
	170	affs_write_inode(struct inode *inode, int unused)
	171	{
	172	struct super_block *sb = inode->i_sb;
	173	struct buffer_head *bh;
	174	struct affs_tail *tail;
	175	uid_t uid;
	176	gid_t gid;
	177
	178	pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
	179
	180	if (!inode->i_nlink)
	181	// possibly free block
	182	return 0;
	183	bh = affs_bread(sb, inode->i_ino);
	184	if (!bh) {
	185	affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
	186	return -EIO;
	187	}
	188	tail = AFFS_TAIL(sb, bh);
	189	if (tail->stype == cpu_to_be32(ST_ROOT)) {
	190	secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
	191	} else {
	192	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	193	tail->size = cpu_to_be32(inode->i_size);
	194	secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
	195	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
	196	uid = inode->i_uid;
	197	gid = inode->i_gid;
	198	if (AFFS_SB(sb)->s_flags & SF_MUFS) {
	199	if (inode->i_uid == 0 \|\| inode->i_uid == 0xFFFF)
	200	uid = inode->i_uid ^ ~0;
	201	if (inode->i_gid == 0 \|\| inode->i_gid == 0xFFFF)
	202	gid = inode->i_gid ^ ~0;
	203	}
	204	if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
	205	tail->uid = cpu_to_be16(uid);
	206	if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
	207	tail->gid = cpu_to_be16(gid);
	208	}
	209	}
	210	affs_fix_checksum(sb, bh);
	211	mark_buffer_dirty_inode(bh, inode);
	212	affs_brelse(bh);
	213	affs_free_prealloc(inode);
	214	return 0;
	215	}
	216
	217	int
	218	affs_notify_change(struct dentry dentry, struct iattr attr)
	219	{
	220	struct inode *inode = dentry->d_inode;
	221	int error;
	222
	223	pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
	224
	225	error = inode_change_ok(inode,attr);
	226	if (error)
	227	goto out;
	228
	229	if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) \|\|
	230	((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) \|\|
231	((attr->ia_valid & ATTR_MODE) &&
232	(AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE \| SF_IMMUTABLE)))) {
233	if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
234	error = -EPERM;
235	goto out;
236	}
237
238	error = inode_setattr(inode, attr);
239	if (!error && (attr->ia_valid & ATTR_MODE))
240	mode_to_prot(inode);
241	out:
242	return error;
243	}
244
1da177e4 LT	245	void
	246	affs_delete_inode(struct inode *inode)
	247	{
	248	pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
fef26658	249	truncate_inode_pages(&inode->i_data, 0);
1da177e4	250	inode->i_size = 0;
dca3c336	251	affs_truncate(inode);
1da177e4 LT	252	clear_inode(inode);
	253	affs_free_block(inode->i_sb, inode->i_ino);
	254	}
	255
	256	void
	257	affs_clear_inode(struct inode *inode)
	258	{
dca3c336	259	unsigned long cache_page;
1da177e4 LT	260
1da177e4 LT	261	pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
dca3c336 RZ	262
	263	affs_free_prealloc(inode);
	264	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4 LT	265	if (cache_page) {
	266	pr_debug("AFFS: freeing ext cache\n");
	267	AFFS_I(inode)->i_lc = NULL;
	268	AFFS_I(inode)->i_ac = NULL;
	269	free_page(cache_page);
	270	}
	271	affs_brelse(AFFS_I(inode)->i_ext_bh);
	272	AFFS_I(inode)->i_ext_last = ~1;
	273	AFFS_I(inode)->i_ext_bh = NULL;
	274	}
	275
	276	struct inode *
	277	affs_new_inode(struct inode *dir)
	278	{
	279	struct super_block *sb = dir->i_sb;
	280	struct inode *inode;
	281	u32 block;
	282	struct buffer_head *bh;
	283
	284	if (!(inode = new_inode(sb)))
	285	goto err_inode;
	286
	287	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	288	goto err_block;
	289
	290	bh = affs_getzeroblk(sb, block);
	291	if (!bh)
	292	goto err_bh;
	293	mark_buffer_dirty_inode(bh, inode);
	294	affs_brelse(bh);
	295
	296	inode->i_uid = current->fsuid;
	297	inode->i_gid = current->fsgid;
	298	inode->i_ino = block;
	299	inode->i_nlink = 1;
	300	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
dca3c336	301	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	302	AFFS_I(inode)->i_blkcnt = 0;
	303	AFFS_I(inode)->i_lc = NULL;
	304	AFFS_I(inode)->i_lc_size = 0;
	305	AFFS_I(inode)->i_lc_shift = 0;
	306	AFFS_I(inode)->i_lc_mask = 0;
	307	AFFS_I(inode)->i_ac = NULL;
	308	AFFS_I(inode)->i_ext_bh = NULL;
	309	AFFS_I(inode)->mmu_private = 0;
	310	AFFS_I(inode)->i_protect = 0;
	311	AFFS_I(inode)->i_lastalloc = 0;
	312	AFFS_I(inode)->i_pa_cnt = 0;
	313	AFFS_I(inode)->i_extcnt = 1;
	314	AFFS_I(inode)->i_ext_last = ~1;
	315
	316	insert_inode_hash(inode);
	317
	318	return inode;
	319
	320	err_bh:
	321	affs_free_block(sb, block);
	322	err_block:
	323	iput(inode);
	324	err_inode:
	325	return NULL;
	326	}
	327
	328	/*
	329	* Add an entry to a directory. Create the header block
	330	* and insert it into the hash table.
	331	*/
	332
	333	int
	334	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	335	{
	336	struct super_block *sb = dir->i_sb;
	337	struct buffer_head *inode_bh = NULL;
	338	struct buffer_head *bh = NULL;
	339	u32 block = 0;
	340	int retval;
	341
	342	pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
	343	(u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
	344
	345	retval = -EIO;
	346	bh = affs_bread(sb, inode->i_ino);
	347	if (!bh)
	348	goto done;
	349
	350	affs_lock_link(inode);
	351	switch (type) {
	352	case ST_LINKFILE:
	353	case ST_LINKDIR:
1da177e4 LT	354	retval = -ENOSPC;
	355	block = affs_alloc_block(dir, dir->i_ino);
	356	if (!block)
	357	goto err;
	358	retval = -EIO;
dca3c336	359	inode_bh = bh;
1da177e4 LT	360	bh = affs_getzeroblk(sb, block);
	361	if (!bh)
	362	goto err;
	363	break;
	364	default:
	365	break;
	366	}
	367
	368	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	369	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	370	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	371	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	372	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	373
	374	if (inode_bh) {
	375	__be32 chain;
	376	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	377	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	378	AFFS_TAIL(sb, bh)->link_chain = chain;
	379	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	380	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	381	mark_buffer_dirty_inode(inode_bh, inode);
	382	inode->i_nlink = 2;
	383	atomic_inc(&inode->i_count);
	384	}
	385	affs_fix_checksum(sb, bh);
	386	mark_buffer_dirty_inode(bh, inode);
	387	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	388
	389	affs_lock_dir(dir);
	390	retval = affs_insert_hash(dir, bh);
	391	mark_buffer_dirty_inode(bh, inode);
	392	affs_unlock_dir(dir);
	393	affs_unlock_link(inode);
	394
	395	d_instantiate(dentry, inode);
	396	done:
	397	affs_brelse(inode_bh);
	398	affs_brelse(bh);
	399	return retval;
	400	err:
	401	if (block)
	402	affs_free_block(sb, block);
	403	affs_unlock_link(inode);
	404	goto done;
	405	}