[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"

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;
	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 (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)
		i_uid_write(inode, 0);
	else
		i_uid_write(inode, 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)
		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 ||
		    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 = (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 = i_uid_read(inode);
			gid = i_gid_read(inode);
			if (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_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;
	}

	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("AFFS: evict_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
	truncate_inode_pages(&inode->i_data, 0);

	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("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;

	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 = 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);
		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
754661f1	16	extern const struct inode_operations affs_symlink_inode_operations;
1da177e4 LT	17	extern struct timezone sys_tz;
1da177e4 LT	18
210f8559	19	struct inode affs_iget(struct super_block sb, unsigned long ino)
1da177e4	20	{
1da177e4 LT	21	struct affs_sb_info *sbi = AFFS_SB(sb);
	22	struct buffer_head *bh;
	23	struct affs_head *head;
	24	struct affs_tail *tail;
210f8559	25	struct inode *inode;
1da177e4 LT	26	u32 block;
	27	u32 size;
	28	u32 prot;
	29	u16 id;
	30
210f8559 DH	31	inode = iget_locked(sb, ino);
	32	if (!inode)
	33	return ERR_PTR(-ENOMEM);
	34	if (!(inode->i_state & I_NEW))
	35	return inode;
	36
	37	pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino);
1da177e4 LT	38
	39	block = inode->i_ino;
	40	bh = affs_bread(sb, block);
	41	if (!bh) {
	42	affs_warning(sb, "read_inode", "Cannot read block %d", block);
	43	goto bad_inode;
	44	}
	45	if (affs_checksum_block(sb, bh) \|\| be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
	46	affs_warning(sb,"read_inode",
	47	"Checksum or type (ptype=%d) error on inode %d",
	48	AFFS_HEAD(bh)->ptype, block);
	49	goto bad_inode;
	50	}
	51
	52	head = AFFS_HEAD(bh);
	53	tail = AFFS_TAIL(sb, bh);
	54	prot = be32_to_cpu(tail->protect);
	55
	56	inode->i_size = 0;
bfe86848	57	set_nlink(inode, 1);
1da177e4 LT	58	inode->i_mode = 0;
	59	AFFS_I(inode)->i_extcnt = 1;
	60	AFFS_I(inode)->i_ext_last = ~1;
	61	AFFS_I(inode)->i_protect = prot;
dca3c336	62	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	63	AFFS_I(inode)->i_blkcnt = 0;
	64	AFFS_I(inode)->i_lc = NULL;
	65	AFFS_I(inode)->i_lc_size = 0;
	66	AFFS_I(inode)->i_lc_shift = 0;
	67	AFFS_I(inode)->i_lc_mask = 0;
	68	AFFS_I(inode)->i_ac = NULL;
	69	AFFS_I(inode)->i_ext_bh = NULL;
	70	AFFS_I(inode)->mmu_private = 0;
	71	AFFS_I(inode)->i_lastalloc = 0;
	72	AFFS_I(inode)->i_pa_cnt = 0;
	73
	74	if (sbi->s_flags & SF_SETMODE)
	75	inode->i_mode = sbi->s_mode;
	76	else
	77	inode->i_mode = prot_to_mode(prot);
	78
	79	id = be16_to_cpu(tail->uid);
	80	if (id == 0 \|\| sbi->s_flags & SF_SETUID)
	81	inode->i_uid = sbi->s_uid;
	82	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
8fed10be	83	i_uid_write(inode, 0);
1da177e4	84	else
8fed10be	85	i_uid_write(inode, id);
1da177e4 LT	86
	87	id = be16_to_cpu(tail->gid);
	88	if (id == 0 \|\| sbi->s_flags & SF_SETGID)
	89	inode->i_gid = sbi->s_gid;
	90	else if (id == 0xFFFF && sbi->s_flags & SF_MUFS)
8fed10be	91	i_gid_write(inode, 0);
1da177e4	92	else
8fed10be	93	i_gid_write(inode, id);
1da177e4 LT	94
	95	switch (be32_to_cpu(tail->stype)) {
	96	case ST_ROOT:
	97	inode->i_uid = sbi->s_uid;
	98	inode->i_gid = sbi->s_gid;
	99	/* fall through */
	100	case ST_USERDIR:
	101	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
	102	sbi->s_flags & SF_SETMODE) {
	103	if (inode->i_mode & S_IRUSR)
	104	inode->i_mode \|= S_IXUSR;
	105	if (inode->i_mode & S_IRGRP)
	106	inode->i_mode \|= S_IXGRP;
	107	if (inode->i_mode & S_IROTH)
	108	inode->i_mode \|= S_IXOTH;
	109	inode->i_mode \|= S_IFDIR;
	110	} else
	111	inode->i_mode = S_IRUGO \| S_IXUGO \| S_IWUSR \| S_IFDIR;
1da177e4 LT	112	/* Maybe it should be controlled by mount parameter? */
	113	//inode->i_mode \|= S_ISVTX;
	114	inode->i_op = &affs_dir_inode_operations;
	115	inode->i_fop = &affs_dir_operations;
	116	break;
	117	case ST_LINKDIR:
	118	#if 0
	119	affs_warning(sb, "read_inode", "inode is LINKDIR");
	120	goto bad_inode;
	121	#else
	122	inode->i_mode \|= S_IFDIR;
c765d479	123	/* ... and leave ->i_op and ->i_fop pointing to empty */
1da177e4 LT	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)
bfe86848	140	set_nlink(inode, 2);
1da177e4 LT	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
a9185b41	170	affs_write_inode(struct inode inode, struct writeback_control wbc)
1da177e4 LT	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)) {
8fed10be EB	196	uid = i_uid_read(inode);
8fed10be EB	197	gid = i_gid_read(inode);
1da177e4	198	if (AFFS_SB(sb)->s_flags & SF_MUFS) {
8fed10be EB	199	if (uid == 0 \|\| uid == 0xFFFF)
	200	uid = uid ^ ~0;
	201	if (gid == 0 \|\| gid == 0xFFFF)
	202	gid = gid ^ ~0;
1da177e4 LT	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
1025774c CH	238	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	239	attr->ia_size != i_size_read(inode)) {
1dc1834f	240	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	241	if (error)
1025774c CH	242	return error;
1dc1834f MS	243
	244	truncate_setsize(inode, attr->ia_size);
	245	affs_truncate(inode);
1025774c CH	246	}
	247
	248	setattr_copy(inode, attr);
	249	mark_inode_dirty(inode);
	250
	251	if (attr->ia_valid & ATTR_MODE)
1da177e4 LT	252	mode_to_prot(inode);
	253	out:
	254	return error;
	255	}
	256
1da177e4	257	void
f053ddde	258	affs_evict_inode(struct inode *inode)
1da177e4	259	{
dca3c336	260	unsigned long cache_page;
f053ddde AV	261	pr_debug("AFFS: evict_inode(ino=%lu, nlink=%u)\n", inode->i_ino, inode->i_nlink);
f053ddde AV	262	truncate_inode_pages(&inode->i_data, 0);
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 LT	273	if (cache_page) {
	274	pr_debug("AFFS: freeing ext cache\n");
	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;
	349	struct buffer_head *bh = NULL;
	350	u32 block = 0;
	351	int retval;
	352
	353	pr_debug("AFFS: add_entry(dir=%u, inode=%u, \"%*s\", type=%d)\n", (u32)dir->i_ino,
	354	(u32)inode->i_ino, (int)dentry->d_name.len, dentry->d_name.name, type);
	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	}