[linux.git] / fs / hpfs / inode.c

/*
 *  linux/fs/hpfs/inode.c
 *
 *  Mikulas Patocka ([email protected]), 1998-1999
 *
 *  inode VFS functions
 */

#include <linux/slab.h>
#include <linux/user_namespace.h>
#include "hpfs_fn.h"

void hpfs_init_inode(struct inode *i)
{
	struct super_block *sb = i->i_sb;
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);

	i->i_uid = hpfs_sb(sb)->sb_uid;
	i->i_gid = hpfs_sb(sb)->sb_gid;
	i->i_mode = hpfs_sb(sb)->sb_mode;
	i->i_size = -1;
	i->i_blocks = -1;
	
	hpfs_inode->i_dno = 0;
	hpfs_inode->i_n_secs = 0;
	hpfs_inode->i_file_sec = 0;
	hpfs_inode->i_disk_sec = 0;
	hpfs_inode->i_dpos = 0;
	hpfs_inode->i_dsubdno = 0;
	hpfs_inode->i_ea_mode = 0;
	hpfs_inode->i_ea_uid = 0;
	hpfs_inode->i_ea_gid = 0;
	hpfs_inode->i_ea_size = 0;

	hpfs_inode->i_rddir_off = NULL;
	hpfs_inode->i_dirty = 0;

	i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0;
	i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0;
	i->i_atime.tv_sec = i->i_atime.tv_nsec = 0;
}

void hpfs_read_inode(struct inode *i)
{
	struct buffer_head *bh;
	struct fnode *fnode;
	struct super_block *sb = i->i_sb;
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	void *ea;
	int ea_size;

	if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
		/*i->i_mode |= S_IFREG;
		i->i_mode &= ~0111;
		i->i_op = &hpfs_file_iops;
		i->i_fop = &hpfs_file_ops;
		clear_nlink(i);*/
		make_bad_inode(i);
		return;
	}
	if (hpfs_sb(i->i_sb)->sb_eas) {
		if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
			if (ea_size == 2) {
				i_uid_write(i, le16_to_cpu(*(__le16*)ea));
				hpfs_inode->i_ea_uid = 1;
			}
			kfree(ea);
		}
		if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
			if (ea_size == 2) {
				i_gid_write(i, le16_to_cpu(*(__le16*)ea));
				hpfs_inode->i_ea_gid = 1;
			}
			kfree(ea);
		}
		if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
			kfree(ea);
			i->i_mode = S_IFLNK | 0777;
			i->i_op = &page_symlink_inode_operations;
			i->i_data.a_ops = &hpfs_symlink_aops;
			set_nlink(i, 1);
			i->i_size = ea_size;
			i->i_blocks = 1;
			brelse(bh);
			return;
		}
		if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
			int rdev = 0;
			umode_t mode = hpfs_sb(sb)->sb_mode;
			if (ea_size == 2) {
				mode = le16_to_cpu(*(__le16*)ea);
				hpfs_inode->i_ea_mode = 1;
			}
			kfree(ea);
			i->i_mode = mode;
			if (S_ISBLK(mode) || S_ISCHR(mode)) {
				if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
					if (ea_size == 4)
						rdev = le32_to_cpu(*(__le32*)ea);
					kfree(ea);
				}
			}
			if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
				brelse(bh);
				set_nlink(i, 1);
				i->i_size = 0;
				i->i_blocks = 1;
				init_special_inode(i, mode,
					new_decode_dev(rdev));
				return;
			}
		}
	}
	if (fnode_is_dir(fnode)) {
		int n_dnodes, n_subdirs;
		i->i_mode |= S_IFDIR;
		i->i_op = &hpfs_dir_iops;
		i->i_fop = &hpfs_dir_ops;
		hpfs_inode->i_parent_dir = le32_to_cpu(fnode->up);
		hpfs_inode->i_dno = le32_to_cpu(fnode->u.external[0].disk_secno);
		if (hpfs_sb(sb)->sb_chk >= 2) {
			struct buffer_head *bh0;
			if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
		}
		n_dnodes = 0; n_subdirs = 0;
		hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL);
		i->i_blocks = 4 * n_dnodes;
		i->i_size = 2048 * n_dnodes;
		set_nlink(i, 2 + n_subdirs);
	} else {
		i->i_mode |= S_IFREG;
		if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111;
		i->i_op = &hpfs_file_iops;
		i->i_fop = &hpfs_file_ops;
		set_nlink(i, 1);
		i->i_size = le32_to_cpu(fnode->file_size);
		i->i_blocks = ((i->i_size + 511) >> 9) + 1;
		i->i_data.a_ops = &hpfs_aops;
		hpfs_i(i)->mmu_private = i->i_size;
	}
	brelse(bh);
}

static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
{
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	/*if (le32_to_cpu(fnode->acl_size_l) || le16_to_cpu(fnode->acl_size_s)) {
		   Some unknown structures like ACL may be in fnode,
		   we'd better not overwrite them
		hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 structures", i->i_ino);
	} else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) {
		__le32 ea;
		if (!uid_eq(i->i_uid, hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) {
			ea = cpu_to_le32(i_uid_read(i));
			hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
			hpfs_inode->i_ea_uid = 1;
		}
		if (!gid_eq(i->i_gid, hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) {
			ea = cpu_to_le32(i_gid_read(i));
			hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2);
			hpfs_inode->i_ea_gid = 1;
		}
		if (!S_ISLNK(i->i_mode))
			if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
			  | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
			  && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
			  | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) {
				ea = cpu_to_le32(i->i_mode);
				/* sick, but legal */
				hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2);
				hpfs_inode->i_ea_mode = 1;
			}
		if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
			ea = cpu_to_le32(new_encode_dev(i->i_rdev));
			hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4);
		}
	}
}

void hpfs_write_inode(struct inode *i)
{
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	struct inode *parent;
	if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
	if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) {
		if (*hpfs_inode->i_rddir_off)
			pr_err("write_inode: some position still there\n");
		kfree(hpfs_inode->i_rddir_off);
		hpfs_inode->i_rddir_off = NULL;
	}
	if (!i->i_nlink) {
		return;
	}
	parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
	if (parent) {
		hpfs_inode->i_dirty = 0;
		if (parent->i_state & I_NEW) {
			hpfs_init_inode(parent);
			hpfs_read_inode(parent);
			unlock_new_inode(parent);
		}
		hpfs_write_inode_nolock(i);
		iput(parent);
	}
}

void hpfs_write_inode_nolock(struct inode *i)
{
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	struct buffer_head *bh;
	struct fnode *fnode;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
	if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
	if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
		if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
			brelse(bh);
			return;
		}
	} else de = NULL;
	if (S_ISREG(i->i_mode)) {
		fnode->file_size = cpu_to_le32(i->i_size);
		if (de) de->file_size = cpu_to_le32(i->i_size);
	} else if (S_ISDIR(i->i_mode)) {
		fnode->file_size = cpu_to_le32(0);
		if (de) de->file_size = cpu_to_le32(0);
	}
	hpfs_write_inode_ea(i, fnode);
	if (de) {
		de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
		de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
		de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
		de->read_only = !(i->i_mode & 0222);
		de->ea_size = cpu_to_le32(hpfs_inode->i_ea_size);
		hpfs_mark_4buffers_dirty(&qbh);
		hpfs_brelse4(&qbh);
	}
	if (S_ISDIR(i->i_mode)) {
		if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
			de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
			de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
			de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
			de->read_only = !(i->i_mode & 0222);
			de->ea_size = cpu_to_le32(/*hpfs_inode->i_ea_size*/0);
			de->file_size = cpu_to_le32(0);
			hpfs_mark_4buffers_dirty(&qbh);
			hpfs_brelse4(&qbh);
		} else
			hpfs_error(i->i_sb,
				"directory %08lx doesn't have '.' entry",
				(unsigned long)i->i_ino);
	}
	mark_buffer_dirty(bh);
	brelse(bh);
}

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

	hpfs_lock(inode->i_sb);
	if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root)
		goto out_unlock;
	if ((attr->ia_valid & ATTR_UID) &&
	    from_kuid(&init_user_ns, attr->ia_uid) >= 0x10000)
		goto out_unlock;
	if ((attr->ia_valid & ATTR_GID) &&
	    from_kgid(&init_user_ns, attr->ia_gid) >= 0x10000)
		goto out_unlock;
	if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
		goto out_unlock;

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

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

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

	setattr_copy(inode, attr);

	hpfs_write_inode(inode);

 out_unlock:
	hpfs_unlock(inode->i_sb);
	return error;
}

void hpfs_write_if_changed(struct inode *inode)
{
	struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);

	if (hpfs_inode->i_dirty)
		hpfs_write_inode(inode);
}

void hpfs_evict_inode(struct inode *inode)
{
	truncate_inode_pages_final(&inode->i_data);
	clear_inode(inode);
	if (!inode->i_nlink) {
		hpfs_lock(inode->i_sb);
		hpfs_remove_fnode(inode->i_sb, inode->i_ino);
		hpfs_unlock(inode->i_sb);
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/hpfs/inode.c
	3	*
	4	* Mikulas Patocka ([email protected]), 1998-1999
	5	*
	6	* inode VFS functions
	7	*/
	8
5a0e3ad6	9	#include <linux/slab.h>
0e1a43c7	10	#include <linux/user_namespace.h>
1da177e4 LT	11	#include "hpfs_fn.h"
	12
	13	void hpfs_init_inode(struct inode *i)
	14	{
	15	struct super_block *sb = i->i_sb;
	16	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	17
	18	i->i_uid = hpfs_sb(sb)->sb_uid;
	19	i->i_gid = hpfs_sb(sb)->sb_gid;
	20	i->i_mode = hpfs_sb(sb)->sb_mode;
1da177e4 LT	21	i->i_size = -1;
	22	i->i_blocks = -1;
	23
	24	hpfs_inode->i_dno = 0;
	25	hpfs_inode->i_n_secs = 0;
	26	hpfs_inode->i_file_sec = 0;
	27	hpfs_inode->i_disk_sec = 0;
	28	hpfs_inode->i_dpos = 0;
	29	hpfs_inode->i_dsubdno = 0;
	30	hpfs_inode->i_ea_mode = 0;
	31	hpfs_inode->i_ea_uid = 0;
	32	hpfs_inode->i_ea_gid = 0;
	33	hpfs_inode->i_ea_size = 0;
	34
	35	hpfs_inode->i_rddir_off = NULL;
	36	hpfs_inode->i_dirty = 0;
	37
	38	i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0;
	39	i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0;
	40	i->i_atime.tv_sec = i->i_atime.tv_nsec = 0;
	41	}
	42
	43	void hpfs_read_inode(struct inode *i)
	44	{
	45	struct buffer_head *bh;
	46	struct fnode *fnode;
	47	struct super_block *sb = i->i_sb;
	48	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
7e7742ee	49	void *ea;
1da177e4 LT	50	int ea_size;
	51
	52	if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
	53	/*i->i_mode \|= S_IFREG;
	54	i->i_mode &= ~0111;
	55	i->i_op = &hpfs_file_iops;
	56	i->i_fop = &hpfs_file_ops;
6d6b77f1	57	clear_nlink(i);*/
1da177e4 LT	58	make_bad_inode(i);
	59	return;
	60	}
	61	if (hpfs_sb(i->i_sb)->sb_eas) {
	62	if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
	63	if (ea_size == 2) {
0e1a43c7	64	i_uid_write(i, le16_to_cpu((__le16)ea));
1da177e4 LT	65	hpfs_inode->i_ea_uid = 1;
	66	}
	67	kfree(ea);
	68	}
	69	if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
	70	if (ea_size == 2) {
0e1a43c7	71	i_gid_write(i, le16_to_cpu((__le16)ea));
1da177e4 LT	72	hpfs_inode->i_ea_gid = 1;
	73	}
	74	kfree(ea);
	75	}
	76	if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
	77	kfree(ea);
	78	i->i_mode = S_IFLNK \| 0777;
	79	i->i_op = &page_symlink_inode_operations;
	80	i->i_data.a_ops = &hpfs_symlink_aops;
bfe86848	81	set_nlink(i, 1);
1da177e4 LT	82	i->i_size = ea_size;
	83	i->i_blocks = 1;
	84	brelse(bh);
	85	return;
	86	}
	87	if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
	88	int rdev = 0;
	89	umode_t mode = hpfs_sb(sb)->sb_mode;
	90	if (ea_size == 2) {
2ef10312	91	mode = le16_to_cpu((__le16)ea);
1da177e4 LT	92	hpfs_inode->i_ea_mode = 1;
	93	}
	94	kfree(ea);
	95	i->i_mode = mode;
	96	if (S_ISBLK(mode) \|\| S_ISCHR(mode)) {
	97	if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
	98	if (ea_size == 4)
2ef10312	99	rdev = le32_to_cpu((__le32)ea);
1da177e4 LT	100	kfree(ea);
	101	}
	102	}
	103	if (S_ISBLK(mode) \|\| S_ISCHR(mode) \|\| S_ISFIFO(mode) \|\| S_ISSOCK(mode)) {
	104	brelse(bh);
bfe86848	105	set_nlink(i, 1);
1da177e4 LT	106	i->i_size = 0;
	107	i->i_blocks = 1;
	108	init_special_inode(i, mode,
	109	new_decode_dev(rdev));
	110	return;
	111	}
	112	}
	113	}
c4c99543	114	if (fnode_is_dir(fnode)) {
7e7742ee	115	int n_dnodes, n_subdirs;
1da177e4 LT	116	i->i_mode \|= S_IFDIR;
	117	i->i_op = &hpfs_dir_iops;
	118	i->i_fop = &hpfs_dir_ops;
0b69760b MP	119	hpfs_inode->i_parent_dir = le32_to_cpu(fnode->up);
0b69760b MP	120	hpfs_inode->i_dno = le32_to_cpu(fnode->u.external[0].disk_secno);
1da177e4 LT	121	if (hpfs_sb(sb)->sb_chk >= 2) {
	122	struct buffer_head *bh0;
	123	if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
	124	}
	125	n_dnodes = 0; n_subdirs = 0;
	126	hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL);
	127	i->i_blocks = 4 * n_dnodes;
	128	i->i_size = 2048 * n_dnodes;
bfe86848	129	set_nlink(i, 2 + n_subdirs);
1da177e4 LT	130	} else {
	131	i->i_mode \|= S_IFREG;
	132	if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111;
	133	i->i_op = &hpfs_file_iops;
	134	i->i_fop = &hpfs_file_ops;
bfe86848	135	set_nlink(i, 1);
0b69760b	136	i->i_size = le32_to_cpu(fnode->file_size);
1da177e4 LT	137	i->i_blocks = ((i->i_size + 511) >> 9) + 1;
	138	i->i_data.a_ops = &hpfs_aops;
	139	hpfs_i(i)->mmu_private = i->i_size;
	140	}
	141	brelse(bh);
	142	}
	143
	144	static void hpfs_write_inode_ea(struct inode i, struct fnode fnode)
	145	{
	146	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
0b69760b	147	/*if (le32_to_cpu(fnode->acl_size_l) \|\| le16_to_cpu(fnode->acl_size_s)) {
1da177e4 LT	148	Some unknown structures like ACL may be in fnode,
1da177e4 LT	149	we'd better not overwrite them
8a168ca7	150	hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 structures", i->i_ino);
1da177e4	151	} else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) {
2ef10312	152	__le32 ea;
0e1a43c7 EB	153	if (!uid_eq(i->i_uid, hpfs_sb(i->i_sb)->sb_uid) \|\| hpfs_inode->i_ea_uid) {
0e1a43c7 EB	154	ea = cpu_to_le32(i_uid_read(i));
1da177e4 LT	155	hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
	156	hpfs_inode->i_ea_uid = 1;
	157	}
0e1a43c7 EB	158	if (!gid_eq(i->i_gid, hpfs_sb(i->i_sb)->sb_gid) \|\| hpfs_inode->i_ea_gid) {
0e1a43c7 EB	159	ea = cpu_to_le32(i_gid_read(i));
1da177e4 LT	160	hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2);
	161	hpfs_inode->i_ea_gid = 1;
	162	}
	163	if (!S_ISLNK(i->i_mode))
	164	if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
	165	\| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
	166	&& i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
	167	\| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) \|\| hpfs_inode->i_ea_mode) {
	168	ea = cpu_to_le32(i->i_mode);
2ef10312	169	/* sick, but legal */
1da177e4 LT	170	hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2);
	171	hpfs_inode->i_ea_mode = 1;
	172	}
	173	if (S_ISBLK(i->i_mode) \|\| S_ISCHR(i->i_mode)) {
	174	ea = cpu_to_le32(new_encode_dev(i->i_rdev));
	175	hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4);
	176	}
	177	}
	178	}
	179
	180	void hpfs_write_inode(struct inode *i)
	181	{
	182	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	183	struct inode *parent;
	184	if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
	185	if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) {
b7cb1ce2	186	if (*hpfs_inode->i_rddir_off)
a19189e5	187	pr_err("write_inode: some position still there\n");
1da177e4 LT	188	kfree(hpfs_inode->i_rddir_off);
	189	hpfs_inode->i_rddir_off = NULL;
	190	}
1da177e4	191	if (!i->i_nlink) {
1da177e4 LT	192	return;
	193	}
	194	parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
	195	if (parent) {
	196	hpfs_inode->i_dirty = 0;
	197	if (parent->i_state & I_NEW) {
	198	hpfs_init_inode(parent);
	199	hpfs_read_inode(parent);
	200	unlock_new_inode(parent);
	201	}
1da177e4	202	hpfs_write_inode_nolock(i);
1da177e4	203	iput(parent);
1da177e4	204	}
1da177e4 LT	205	}
	206
	207	void hpfs_write_inode_nolock(struct inode *i)
	208	{
	209	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	210	struct buffer_head *bh;
	211	struct fnode *fnode;
	212	struct quad_buffer_head qbh;
	213	struct hpfs_dirent *de;
	214	if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
	215	if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
	216	if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
	217	if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
	218	brelse(bh);
	219	return;
	220	}
	221	} else de = NULL;
	222	if (S_ISREG(i->i_mode)) {
0b69760b MP	223	fnode->file_size = cpu_to_le32(i->i_size);
0b69760b MP	224	if (de) de->file_size = cpu_to_le32(i->i_size);
1da177e4	225	} else if (S_ISDIR(i->i_mode)) {
0b69760b MP	226	fnode->file_size = cpu_to_le32(0);
0b69760b MP	227	if (de) de->file_size = cpu_to_le32(0);
1da177e4 LT	228	}
	229	hpfs_write_inode_ea(i, fnode);
	230	if (de) {
0b69760b MP	231	de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
	232	de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
	233	de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
1da177e4	234	de->read_only = !(i->i_mode & 0222);
0b69760b	235	de->ea_size = cpu_to_le32(hpfs_inode->i_ea_size);
1da177e4 LT	236	hpfs_mark_4buffers_dirty(&qbh);
	237	hpfs_brelse4(&qbh);
	238	}
	239	if (S_ISDIR(i->i_mode)) {
	240	if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
0b69760b MP	241	de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
	242	de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
	243	de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
1da177e4	244	de->read_only = !(i->i_mode & 0222);
0b69760b MP	245	de->ea_size = cpu_to_le32(/hpfs_inode->i_ea_size/0);
0b69760b MP	246	de->file_size = cpu_to_le32(0);
1da177e4 LT	247	hpfs_mark_4buffers_dirty(&qbh);
1da177e4 LT	248	hpfs_brelse4(&qbh);
18debbbc RD	249	} else
	250	hpfs_error(i->i_sb,
	251	"directory %08lx doesn't have '.' entry",
	252	(unsigned long)i->i_ino);
1da177e4 LT	253	}
	254	mark_buffer_dirty(bh);
	255	brelse(bh);
	256	}
	257
ca30bc99	258	int hpfs_setattr(struct dentry dentry, struct iattr attr)
1da177e4 LT	259	{
1da177e4 LT	260	struct inode *inode = dentry->d_inode;
ca30bc99 CH	261	int error = -EINVAL;
ca30bc99 CH	262
9a311b96	263	hpfs_lock(inode->i_sb);
ca30bc99 CH	264	if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root)
ca30bc99 CH	265	goto out_unlock;
0e1a43c7 EB	266	if ((attr->ia_valid & ATTR_UID) &&
0e1a43c7 EB	267	from_kuid(&init_user_ns, attr->ia_uid) >= 0x10000)
48f10e8c	268	goto out_unlock;
0e1a43c7 EB	269	if ((attr->ia_valid & ATTR_GID) &&
0e1a43c7 EB	270	from_kgid(&init_user_ns, attr->ia_gid) >= 0x10000)
48f10e8c	271	goto out_unlock;
ca30bc99 CH	272	if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
	273	goto out_unlock;
	274
	275	error = inode_change_ok(inode, attr);
	276	if (error)
	277	goto out_unlock;
	278
1025774c CH	279	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	280	attr->ia_size != i_size_read(inode)) {
70b31c4c	281	error = inode_newsize_ok(inode, attr->ia_size);
1025774c	282	if (error)
274052ef	283	goto out_unlock;
70b31c4c MS	284
	285	truncate_setsize(inode, attr->ia_size);
	286	hpfs_truncate(inode);
1025774c CH	287	}
	288
	289	setattr_copy(inode, attr);
ca30bc99 CH	290
	291	hpfs_write_inode(inode);
	292
	293	out_unlock:
9a311b96	294	hpfs_unlock(inode->i_sb);
1da177e4 LT	295	return error;
	296	}
	297
	298	void hpfs_write_if_changed(struct inode *inode)
	299	{
	300	struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
	301
	302	if (hpfs_inode->i_dirty)
	303	hpfs_write_inode(inode);
	304	}
	305
ea544009	306	void hpfs_evict_inode(struct inode *inode)
1da177e4	307	{
91b0abe3	308	truncate_inode_pages_final(&inode->i_data);
dbd5768f	309	clear_inode(inode);
ea544009	310	if (!inode->i_nlink) {
9a311b96	311	hpfs_lock(inode->i_sb);
ea544009	312	hpfs_remove_fnode(inode->i_sb, inode->i_ino);
9a311b96	313	hpfs_unlock(inode->i_sb);
ea544009	314	}
1da177e4	315	}