[net-next-2.6.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;
		/* ... and leave ->i_op and ->i_fop pointing to empty */
		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, struct writeback_control *wbc)
{
	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;
c765d479	122	/* ... and leave ->i_op and ->i_fop pointing to empty */
1da177e4 LT	123	break;
	124	#endif
	125	case ST_LINKFILE:
	126	affs_warning(sb, "read_inode", "inode is LINKFILE");
	127	goto bad_inode;
	128	case ST_FILE:
	129	size = be32_to_cpu(tail->size);
	130	inode->i_mode \|= S_IFREG;
	131	AFFS_I(inode)->mmu_private = inode->i_size = size;
	132	if (inode->i_size) {
	133	AFFS_I(inode)->i_blkcnt = (size - 1) /
	134	sbi->s_data_blksize + 1;
	135	AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
	136	sbi->s_hashsize + 1;
	137	}
	138	if (tail->link_chain)
	139	inode->i_nlink = 2;
	140	inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
	141	inode->i_op = &affs_file_inode_operations;
	142	inode->i_fop = &affs_file_operations;
	143	break;
	144	case ST_SOFTLINK:
	145	inode->i_mode \|= S_IFLNK;
	146	inode->i_op = &affs_symlink_inode_operations;
	147	inode->i_data.a_ops = &affs_symlink_aops;
	148	break;
	149	}
	150
	151	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
	152	= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
	153	be32_to_cpu(tail->change.mins) * 60 +
	154	be32_to_cpu(tail->change.ticks) / 50 +
	155	((8 * 365 + 2) * 24 * 60 * 60)) +
	156	sys_tz.tz_minuteswest * 60;
	157	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	158	affs_brelse(bh);
210f8559 DH	159	unlock_new_inode(inode);
210f8559 DH	160	return inode;
1da177e4 LT	161
1da177e4 LT	162	bad_inode:
1da177e4	163	affs_brelse(bh);
210f8559 DH	164	iget_failed(inode);
210f8559 DH	165	return ERR_PTR(-EIO);
1da177e4 LT	166	}
	167
	168	int
a9185b41	169	affs_write_inode(struct inode inode, struct writeback_control wbc)
1da177e4 LT	170	{
	171	struct super_block *sb = inode->i_sb;
	172	struct buffer_head *bh;
	173	struct affs_tail *tail;
	174	uid_t uid;
	175	gid_t gid;
	176
	177	pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino);
	178
	179	if (!inode->i_nlink)
	180	// possibly free block
	181	return 0;
	182	bh = affs_bread(sb, inode->i_ino);
	183	if (!bh) {
	184	affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
	185	return -EIO;
	186	}
	187	tail = AFFS_TAIL(sb, bh);
	188	if (tail->stype == cpu_to_be32(ST_ROOT)) {
	189	secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
	190	} else {
	191	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	192	tail->size = cpu_to_be32(inode->i_size);
	193	secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
	194	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
	195	uid = inode->i_uid;
	196	gid = inode->i_gid;
	197	if (AFFS_SB(sb)->s_flags & SF_MUFS) {
	198	if (inode->i_uid == 0 \|\| inode->i_uid == 0xFFFF)
	199	uid = inode->i_uid ^ ~0;
	200	if (inode->i_gid == 0 \|\| inode->i_gid == 0xFFFF)
	201	gid = inode->i_gid ^ ~0;
	202	}
	203	if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
	204	tail->uid = cpu_to_be16(uid);
	205	if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
	206	tail->gid = cpu_to_be16(gid);
	207	}
	208	}
	209	affs_fix_checksum(sb, bh);
	210	mark_buffer_dirty_inode(bh, inode);
	211	affs_brelse(bh);
	212	affs_free_prealloc(inode);
	213	return 0;
	214	}
	215
	216	int
	217	affs_notify_change(struct dentry dentry, struct iattr attr)
	218	{
	219	struct inode *inode = dentry->d_inode;
	220	int error;
	221
	222	pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid);
	223
	224	error = inode_change_ok(inode,attr);
	225	if (error)
	226	goto out;
	227
	228	if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) \|\|
	229	((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) \|\|
	230	((attr->ia_valid & ATTR_MODE) &&
	231	(AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE \| SF_IMMUTABLE)))) {
	232	if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
	233	error = -EPERM;
234	goto out;
235	}
236
237	error = inode_setattr(inode, attr);
238	if (!error && (attr->ia_valid & ATTR_MODE))
239	mode_to_prot(inode);
240	out:
241	return error;
242	}
243
1da177e4 LT	244	void
	245	affs_delete_inode(struct inode *inode)
	246	{
	247	pr_debug("AFFS: delete_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
fef26658	248	truncate_inode_pages(&inode->i_data, 0);
1da177e4	249	inode->i_size = 0;
dca3c336	250	affs_truncate(inode);
1da177e4 LT	251	clear_inode(inode);
	252	affs_free_block(inode->i_sb, inode->i_ino);
	253	}
	254
	255	void
	256	affs_clear_inode(struct inode *inode)
	257	{
dca3c336	258	unsigned long cache_page;
1da177e4 LT	259
1da177e4 LT	260	pr_debug("AFFS: clear_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
dca3c336 RZ	261
	262	affs_free_prealloc(inode);
	263	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4 LT	264	if (cache_page) {
	265	pr_debug("AFFS: freeing ext cache\n");
	266	AFFS_I(inode)->i_lc = NULL;
	267	AFFS_I(inode)->i_ac = NULL;
	268	free_page(cache_page);
	269	}
	270	affs_brelse(AFFS_I(inode)->i_ext_bh);
	271	AFFS_I(inode)->i_ext_last = ~1;
	272	AFFS_I(inode)->i_ext_bh = NULL;
	273	}
	274
	275	struct inode *
	276	affs_new_inode(struct inode *dir)
	277	{
	278	struct super_block *sb = dir->i_sb;
	279	struct inode *inode;
	280	u32 block;
	281	struct buffer_head *bh;
	282
	283	if (!(inode = new_inode(sb)))
	284	goto err_inode;
	285
	286	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	287	goto err_block;
	288
	289	bh = affs_getzeroblk(sb, block);
	290	if (!bh)
	291	goto err_bh;
	292	mark_buffer_dirty_inode(bh, inode);
	293	affs_brelse(bh);
	294
21559981 DH	295	inode->i_uid = current_fsuid();
21559981 DH	296	inode->i_gid = current_fsgid();
1da177e4 LT	297	inode->i_ino = block;
	298	inode->i_nlink = 1;
	299	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
dca3c336	300	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	301	AFFS_I(inode)->i_blkcnt = 0;
	302	AFFS_I(inode)->i_lc = NULL;
	303	AFFS_I(inode)->i_lc_size = 0;
	304	AFFS_I(inode)->i_lc_shift = 0;
	305	AFFS_I(inode)->i_lc_mask = 0;
	306	AFFS_I(inode)->i_ac = NULL;
	307	AFFS_I(inode)->i_ext_bh = NULL;
	308	AFFS_I(inode)->mmu_private = 0;
	309	AFFS_I(inode)->i_protect = 0;
	310	AFFS_I(inode)->i_lastalloc = 0;
	311	AFFS_I(inode)->i_pa_cnt = 0;
	312	AFFS_I(inode)->i_extcnt = 1;
	313	AFFS_I(inode)->i_ext_last = ~1;
	314
	315	insert_inode_hash(inode);
	316
	317	return inode;
	318
	319	err_bh:
	320	affs_free_block(sb, block);
	321	err_block:
	322	iput(inode);
	323	err_inode:
	324	return NULL;
	325	}
	326
	327	/*
	328	* Add an entry to a directory. Create the header block
	329	* and insert it into the hash table.
	330	*/
	331
	332	int
	333	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	334	{
	335	struct super_block *sb = dir->i_sb;
	336	struct buffer_head *inode_bh = NULL;
	337	struct buffer_head *bh = NULL;
	338	u32 block = 0;
	339	int retval;
	340
	341	pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
	342	(u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
	343
	344	retval = -EIO;
	345	bh = affs_bread(sb, inode->i_ino);
	346	if (!bh)
	347	goto done;
	348
	349	affs_lock_link(inode);
	350	switch (type) {
	351	case ST_LINKFILE:
	352	case ST_LINKDIR:
1da177e4 LT	353	retval = -ENOSPC;
	354	block = affs_alloc_block(dir, dir->i_ino);
	355	if (!block)
	356	goto err;
	357	retval = -EIO;
dca3c336	358	inode_bh = bh;
1da177e4 LT	359	bh = affs_getzeroblk(sb, block);
	360	if (!bh)
	361	goto err;
	362	break;
	363	default:
	364	break;
	365	}
	366
	367	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	368	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	369	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	370	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	371	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	372
	373	if (inode_bh) {
	374	__be32 chain;
	375	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	376	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	377	AFFS_TAIL(sb, bh)->link_chain = chain;
	378	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	379	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	380	mark_buffer_dirty_inode(inode_bh, inode);
	381	inode->i_nlink = 2;
	382	atomic_inc(&inode->i_count);
	383	}
	384	affs_fix_checksum(sb, bh);
	385	mark_buffer_dirty_inode(bh, inode);
	386	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	387
	388	affs_lock_dir(dir);
	389	retval = affs_insert_hash(dir, bh);
	390	mark_buffer_dirty_inode(bh, inode);
	391	affs_unlock_dir(dir);
	392	affs_unlock_link(inode);
	393
	394	d_instantiate(dentry, inode);
	395	done:
	396	affs_brelse(inode_bh);
	397	affs_brelse(bh);
	398	return retval;
	399	err:
	400	if (block)
	401	affs_free_block(sb, block);
	402	affs_unlock_link(inode);
	403	goto done;
	404	}