[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 <linux/gfp.h>
#include "affs.h"

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_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_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;
	}

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

	inode->i_size = 0;
	set_nlink(inode, 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 (affs_test_opt(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 || affs_test_opt(sbi->s_flags, SF_SETUID))
		inode->i_uid = sbi->s_uid;
	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
		i_uid_write(inode, 0);
	else
		i_uid_write(inode, id);

	id = be16_to_cpu(tail->gid);
	if (id == 0 || affs_test_opt(sbi->s_flags, SF_SETGID))
		inode->i_gid = sbi->s_gid;
	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
		i_gid_write(inode, 0);
	else
		i_gid_write(inode, 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 ||
		    affs_test_opt(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)
			set_nlink(inode, 2);
		inode->i_mapping->a_ops = affs_test_opt(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("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 = i_uid_read(inode);
			gid = i_gid_read(inode);
			if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
				if (uid == 0 || uid == 0xFFFF)
					uid = uid ^ ~0;
				if (gid == 0 || gid == 0xFFFF)
					gid = gid ^ ~0;
			}
			if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
				tail->uid = cpu_to_be16(uid);
			if (!affs_test_opt(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 = d_inode(dentry);
	int error;

	pr_debug("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_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) ||
	    ((attr->ia_valid & ATTR_GID) &&
	      affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) ||
	    ((attr->ia_valid & ATTR_MODE) &&
	     (AFFS_SB(inode->i_sb)->s_flags &
	      (AFFS_MOUNT_SF_SETMODE | AFFS_MOUNT_SF_IMMUTABLE)))) {
		if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
			error = -EPERM;
		goto out;
	}

	if ((attr->ia_valid & ATTR_SIZE) &&
	    attr->ia_size != i_size_read(inode)) {
		error = inode_newsize_ok(inode, attr->ia_size);
		if (error)
			return error;

		truncate_setsize(inode, attr->ia_size);
		affs_truncate(inode);
	}

	setattr_copy(inode, attr);
	mark_inode_dirty(inode);

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

void
affs_evict_inode(struct inode *inode)
{
	unsigned long cache_page;
	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
		 inode->i_ino, inode->i_nlink);
	truncate_inode_pages_final(&inode->i_data);

	if (!inode->i_nlink) {
		inode->i_size = 0;
		affs_truncate(inode);
	}

	invalidate_inode_buffers(inode);
	clear_inode(inode);
	affs_free_prealloc(inode);
	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
	if (cache_page) {
		pr_debug("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;

	if (!inode->i_nlink)
		affs_free_block(inode->i_sb, inode->i_ino);
}

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;
	set_nlink(inode, 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;
	u32 block = 0;
	int retval;

	pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
		 dir->i_ino, inode->i_ino, dentry, 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);
		set_nlink(inode, 2);
		ihold(inode);
	}
	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>
5a0e3ad6	13	#include <linux/gfp.h>
1da177e4 LT	14	#include "affs.h"
1da177e4 LT	15
210f8559	16	struct inode affs_iget(struct super_block sb, unsigned long ino)
1da177e4	17	{
1da177e4 LT	18	struct affs_sb_info *sbi = AFFS_SB(sb);
1da177e4 LT	19	struct buffer_head *bh;
1da177e4	20	struct affs_tail *tail;
210f8559	21	struct inode *inode;
1da177e4 LT	22	u32 block;
	23	u32 size;
	24	u32 prot;
	25	u16 id;
	26
210f8559 DH	27	inode = iget_locked(sb, ino);
	28	if (!inode)
	29	return ERR_PTR(-ENOMEM);
	30	if (!(inode->i_state & I_NEW))
	31	return inode;
	32
9606d9aa	33	pr_debug("affs_iget(%lu)\n", inode->i_ino);
1da177e4 LT	34
	35	block = inode->i_ino;
	36	bh = affs_bread(sb, block);
	37	if (!bh) {
	38	affs_warning(sb, "read_inode", "Cannot read block %d", block);
	39	goto bad_inode;
	40	}
	41	if (affs_checksum_block(sb, bh) \|\| be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
	42	affs_warning(sb,"read_inode",
	43	"Checksum or type (ptype=%d) error on inode %d",
	44	AFFS_HEAD(bh)->ptype, block);
	45	goto bad_inode;
	46	}
	47
1da177e4 LT	48	tail = AFFS_TAIL(sb, bh);
	49	prot = be32_to_cpu(tail->protect);
	50
	51	inode->i_size = 0;
bfe86848	52	set_nlink(inode, 1);
1da177e4 LT	53	inode->i_mode = 0;
	54	AFFS_I(inode)->i_extcnt = 1;
	55	AFFS_I(inode)->i_ext_last = ~1;
	56	AFFS_I(inode)->i_protect = prot;
dca3c336	57	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	58	AFFS_I(inode)->i_blkcnt = 0;
	59	AFFS_I(inode)->i_lc = NULL;
	60	AFFS_I(inode)->i_lc_size = 0;
	61	AFFS_I(inode)->i_lc_shift = 0;
	62	AFFS_I(inode)->i_lc_mask = 0;
	63	AFFS_I(inode)->i_ac = NULL;
	64	AFFS_I(inode)->i_ext_bh = NULL;
	65	AFFS_I(inode)->mmu_private = 0;
	66	AFFS_I(inode)->i_lastalloc = 0;
	67	AFFS_I(inode)->i_pa_cnt = 0;
	68
79bda4d5	69	if (affs_test_opt(sbi->s_flags, SF_SETMODE))
1da177e4 LT	70	inode->i_mode = sbi->s_mode;
	71	else
	72	inode->i_mode = prot_to_mode(prot);
	73
	74	id = be16_to_cpu(tail->uid);
79bda4d5	75	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETUID))
1da177e4	76	inode->i_uid = sbi->s_uid;
79bda4d5	77	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	78	i_uid_write(inode, 0);
1da177e4	79	else
8fed10be	80	i_uid_write(inode, id);
1da177e4 LT	81
1da177e4 LT	82	id = be16_to_cpu(tail->gid);
79bda4d5	83	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETGID))
1da177e4	84	inode->i_gid = sbi->s_gid;
79bda4d5	85	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	86	i_gid_write(inode, 0);
1da177e4	87	else
8fed10be	88	i_gid_write(inode, id);
1da177e4 LT	89
	90	switch (be32_to_cpu(tail->stype)) {
	91	case ST_ROOT:
	92	inode->i_uid = sbi->s_uid;
	93	inode->i_gid = sbi->s_gid;
	94	/* fall through */
	95	case ST_USERDIR:
	96	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
79bda4d5	97	affs_test_opt(sbi->s_flags, SF_SETMODE)) {
1da177e4 LT	98	if (inode->i_mode & S_IRUSR)
	99	inode->i_mode \|= S_IXUSR;
	100	if (inode->i_mode & S_IRGRP)
	101	inode->i_mode \|= S_IXGRP;
	102	if (inode->i_mode & S_IROTH)
	103	inode->i_mode \|= S_IXOTH;
	104	inode->i_mode \|= S_IFDIR;
	105	} else
	106	inode->i_mode = S_IRUGO \| S_IXUGO \| S_IWUSR \| S_IFDIR;
1da177e4 LT	107	/* Maybe it should be controlled by mount parameter? */
	108	//inode->i_mode \|= S_ISVTX;
	109	inode->i_op = &affs_dir_inode_operations;
	110	inode->i_fop = &affs_dir_operations;
	111	break;
	112	case ST_LINKDIR:
	113	#if 0
	114	affs_warning(sb, "read_inode", "inode is LINKDIR");
	115	goto bad_inode;
	116	#else
	117	inode->i_mode \|= S_IFDIR;
c765d479	118	/* ... and leave ->i_op and ->i_fop pointing to empty */
1da177e4 LT	119	break;
	120	#endif
	121	case ST_LINKFILE:
	122	affs_warning(sb, "read_inode", "inode is LINKFILE");
	123	goto bad_inode;
	124	case ST_FILE:
	125	size = be32_to_cpu(tail->size);
	126	inode->i_mode \|= S_IFREG;
	127	AFFS_I(inode)->mmu_private = inode->i_size = size;
	128	if (inode->i_size) {
	129	AFFS_I(inode)->i_blkcnt = (size - 1) /
	130	sbi->s_data_blksize + 1;
	131	AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
	132	sbi->s_hashsize + 1;
	133	}
	134	if (tail->link_chain)
bfe86848	135	set_nlink(inode, 2);
79bda4d5	136	inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
a0016ff2	137	&affs_aops_ofs : &affs_aops;
1da177e4 LT	138	inode->i_op = &affs_file_inode_operations;
	139	inode->i_fop = &affs_file_operations;
	140	break;
	141	case ST_SOFTLINK:
	142	inode->i_mode \|= S_IFLNK;
	143	inode->i_op = &affs_symlink_inode_operations;
	144	inode->i_data.a_ops = &affs_symlink_aops;
	145	break;
	146	}
	147
	148	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
	149	= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
	150	be32_to_cpu(tail->change.mins) * 60 +
	151	be32_to_cpu(tail->change.ticks) / 50 +
	152	((8 * 365 + 2) * 24 * 60 * 60)) +
	153	sys_tz.tz_minuteswest * 60;
	154	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	155	affs_brelse(bh);
210f8559 DH	156	unlock_new_inode(inode);
210f8559 DH	157	return inode;
1da177e4 LT	158
1da177e4 LT	159	bad_inode:
1da177e4	160	affs_brelse(bh);
210f8559 DH	161	iget_failed(inode);
210f8559 DH	162	return ERR_PTR(-EIO);
1da177e4 LT	163	}
	164
	165	int
a9185b41	166	affs_write_inode(struct inode inode, struct writeback_control wbc)
1da177e4 LT	167	{
	168	struct super_block *sb = inode->i_sb;
	169	struct buffer_head *bh;
	170	struct affs_tail *tail;
	171	uid_t uid;
	172	gid_t gid;
	173
9606d9aa	174	pr_debug("write_inode(%lu)\n", inode->i_ino);
1da177e4 LT	175
	176	if (!inode->i_nlink)
	177	// possibly free block
	178	return 0;
	179	bh = affs_bread(sb, inode->i_ino);
	180	if (!bh) {
	181	affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
	182	return -EIO;
	183	}
	184	tail = AFFS_TAIL(sb, bh);
	185	if (tail->stype == cpu_to_be32(ST_ROOT)) {
	186	secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
	187	} else {
	188	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	189	tail->size = cpu_to_be32(inode->i_size);
	190	secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
	191	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
8fed10be EB	192	uid = i_uid_read(inode);
8fed10be EB	193	gid = i_gid_read(inode);
79bda4d5	194	if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
8fed10be EB	195	if (uid == 0 \|\| uid == 0xFFFF)
	196	uid = uid ^ ~0;
	197	if (gid == 0 \|\| gid == 0xFFFF)
	198	gid = gid ^ ~0;
1da177e4	199	}
79bda4d5	200	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
1da177e4	201	tail->uid = cpu_to_be16(uid);
79bda4d5	202	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
1da177e4 LT	203	tail->gid = cpu_to_be16(gid);
	204	}
	205	}
	206	affs_fix_checksum(sb, bh);
	207	mark_buffer_dirty_inode(bh, inode);
	208	affs_brelse(bh);
	209	affs_free_prealloc(inode);
	210	return 0;
	211	}
	212
	213	int
	214	affs_notify_change(struct dentry dentry, struct iattr attr)
	215	{
2b0143b5	216	struct inode *inode = d_inode(dentry);
1da177e4 LT	217	int error;
1da177e4 LT	218
9606d9aa	219	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
1da177e4 LT	220
	221	error = inode_change_ok(inode,attr);
	222	if (error)
	223	goto out;
	224
a0016ff2	225	if (((attr->ia_valid & ATTR_UID) &&
79bda4d5	226	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) \|\|
a0016ff2	227	((attr->ia_valid & ATTR_GID) &&
79bda4d5	228	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) \|\|
1da177e4	229	((attr->ia_valid & ATTR_MODE) &&
a0016ff2 FF	230	(AFFS_SB(inode->i_sb)->s_flags &
a0016ff2 FF	231	(AFFS_MOUNT_SF_SETMODE \| AFFS_MOUNT_SF_IMMUTABLE)))) {
79bda4d5	232	if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
1da177e4 LT	233	error = -EPERM;
	234	goto out;
	235	}
	236
1025774c CH	237	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	238	attr->ia_size != i_size_read(inode)) {
1dc1834f	239	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	240	if (error)
1025774c CH	241	return error;
1dc1834f MS	242
	243	truncate_setsize(inode, attr->ia_size);
	244	affs_truncate(inode);
1025774c CH	245	}
	246
	247	setattr_copy(inode, attr);
	248	mark_inode_dirty(inode);
	249
	250	if (attr->ia_valid & ATTR_MODE)
1da177e4 LT	251	mode_to_prot(inode);
	252	out:
	253	return error;
	254	}
	255
1da177e4	256	void
f053ddde	257	affs_evict_inode(struct inode *inode)
1da177e4	258	{
dca3c336	259	unsigned long cache_page;
9606d9aa FF	260	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
9606d9aa FF	261	inode->i_ino, inode->i_nlink);
91b0abe3	262	truncate_inode_pages_final(&inode->i_data);
1da177e4	263
f053ddde AV	264	if (!inode->i_nlink) {
	265	inode->i_size = 0;
	266	affs_truncate(inode);
	267	}
dca3c336	268
f053ddde	269	invalidate_inode_buffers(inode);
dbd5768f	270	clear_inode(inode);
dca3c336 RZ	271	affs_free_prealloc(inode);
dca3c336 RZ	272	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4	273	if (cache_page) {
9606d9aa	274	pr_debug("freeing ext cache\n");
1da177e4 LT	275	AFFS_I(inode)->i_lc = NULL;
	276	AFFS_I(inode)->i_ac = NULL;
	277	free_page(cache_page);
	278	}
	279	affs_brelse(AFFS_I(inode)->i_ext_bh);
	280	AFFS_I(inode)->i_ext_last = ~1;
	281	AFFS_I(inode)->i_ext_bh = NULL;
f053ddde AV	282
	283	if (!inode->i_nlink)
	284	affs_free_block(inode->i_sb, inode->i_ino);
1da177e4 LT	285	}
	286
	287	struct inode *
	288	affs_new_inode(struct inode *dir)
	289	{
	290	struct super_block *sb = dir->i_sb;
	291	struct inode *inode;
	292	u32 block;
	293	struct buffer_head *bh;
	294
	295	if (!(inode = new_inode(sb)))
	296	goto err_inode;
	297
	298	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	299	goto err_block;
	300
	301	bh = affs_getzeroblk(sb, block);
	302	if (!bh)
	303	goto err_bh;
	304	mark_buffer_dirty_inode(bh, inode);
	305	affs_brelse(bh);
	306
21559981 DH	307	inode->i_uid = current_fsuid();
21559981 DH	308	inode->i_gid = current_fsgid();
1da177e4	309	inode->i_ino = block;
bfe86848	310	set_nlink(inode, 1);
1da177e4	311	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
dca3c336	312	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	313	AFFS_I(inode)->i_blkcnt = 0;
	314	AFFS_I(inode)->i_lc = NULL;
	315	AFFS_I(inode)->i_lc_size = 0;
	316	AFFS_I(inode)->i_lc_shift = 0;
	317	AFFS_I(inode)->i_lc_mask = 0;
	318	AFFS_I(inode)->i_ac = NULL;
	319	AFFS_I(inode)->i_ext_bh = NULL;
	320	AFFS_I(inode)->mmu_private = 0;
	321	AFFS_I(inode)->i_protect = 0;
	322	AFFS_I(inode)->i_lastalloc = 0;
	323	AFFS_I(inode)->i_pa_cnt = 0;
	324	AFFS_I(inode)->i_extcnt = 1;
	325	AFFS_I(inode)->i_ext_last = ~1;
	326
	327	insert_inode_hash(inode);
	328
	329	return inode;
	330
	331	err_bh:
	332	affs_free_block(sb, block);
	333	err_block:
	334	iput(inode);
	335	err_inode:
	336	return NULL;
	337	}
	338
	339	/*
	340	* Add an entry to a directory. Create the header block
	341	* and insert it into the hash table.
	342	*/
	343
	344	int
	345	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	346	{
	347	struct super_block *sb = dir->i_sb;
	348	struct buffer_head *inode_bh = NULL;
78f444f6	349	struct buffer_head *bh;
1da177e4 LT	350	u32 block = 0;
	351	int retval;
	352
08fe100d GU	353	pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
08fe100d GU	354	dir->i_ino, inode->i_ino, dentry, type);
1da177e4 LT	355
	356	retval = -EIO;
	357	bh = affs_bread(sb, inode->i_ino);
	358	if (!bh)
	359	goto done;
	360
	361	affs_lock_link(inode);
	362	switch (type) {
	363	case ST_LINKFILE:
	364	case ST_LINKDIR:
1da177e4 LT	365	retval = -ENOSPC;
	366	block = affs_alloc_block(dir, dir->i_ino);
	367	if (!block)
	368	goto err;
	369	retval = -EIO;
dca3c336	370	inode_bh = bh;
1da177e4 LT	371	bh = affs_getzeroblk(sb, block);
	372	if (!bh)
	373	goto err;
	374	break;
	375	default:
	376	break;
	377	}
	378
	379	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	380	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	381	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	382	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	383	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	384
	385	if (inode_bh) {
	386	__be32 chain;
	387	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	388	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	389	AFFS_TAIL(sb, bh)->link_chain = chain;
	390	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	391	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	392	mark_buffer_dirty_inode(inode_bh, inode);
bfe86848	393	set_nlink(inode, 2);
7de9c6ee	394	ihold(inode);
1da177e4 LT	395	}
	396	affs_fix_checksum(sb, bh);
	397	mark_buffer_dirty_inode(bh, inode);
	398	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	399
	400	affs_lock_dir(dir);
	401	retval = affs_insert_hash(dir, bh);
	402	mark_buffer_dirty_inode(bh, inode);
	403	affs_unlock_dir(dir);
	404	affs_unlock_link(inode);
	405
	406	d_instantiate(dentry, inode);
	407	done:
	408	affs_brelse(inode_bh);
	409	affs_brelse(bh);
	410	return retval;
	411	err:
	412	if (block)
	413	affs_free_block(sb, block);
	414	affs_unlock_link(inode);
	415	goto done;
	416	}