[linux-2.6-block.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 = affs_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_nohighmem(inode);
		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)) {
		affs_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);
		affs_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 = setattr_prepare(dentry, 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)
		affs_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(inode);
	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;
1da177e4 LT	71	else
c1618208	72	inode->i_mode = affs_prot_to_mode(prot);
1da177e4 LT	73
1da177e4 LT	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;
21fc61c7	143	inode_nohighmem(inode);
1da177e4 LT	144	inode->i_op = &affs_symlink_inode_operations;
	145	inode->i_data.a_ops = &affs_symlink_aops;
	146	break;
	147	}
	148
	149	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
	150	= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
	151	be32_to_cpu(tail->change.mins) * 60 +
	152	be32_to_cpu(tail->change.ticks) / 50 +
	153	((8 * 365 + 2) * 24 * 60 * 60)) +
	154	sys_tz.tz_minuteswest * 60;
	155	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	156	affs_brelse(bh);
210f8559 DH	157	unlock_new_inode(inode);
210f8559 DH	158	return inode;
1da177e4 LT	159
1da177e4 LT	160	bad_inode:
1da177e4	161	affs_brelse(bh);
210f8559 DH	162	iget_failed(inode);
210f8559 DH	163	return ERR_PTR(-EIO);
1da177e4 LT	164	}
	165
	166	int
a9185b41	167	affs_write_inode(struct inode inode, struct writeback_control wbc)
1da177e4 LT	168	{
	169	struct super_block *sb = inode->i_sb;
	170	struct buffer_head *bh;
	171	struct affs_tail *tail;
	172	uid_t uid;
	173	gid_t gid;
	174
9606d9aa	175	pr_debug("write_inode(%lu)\n", inode->i_ino);
1da177e4 LT	176
	177	if (!inode->i_nlink)
	178	// possibly free block
	179	return 0;
	180	bh = affs_bread(sb, inode->i_ino);
	181	if (!bh) {
	182	affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
	183	return -EIO;
	184	}
	185	tail = AFFS_TAIL(sb, bh);
	186	if (tail->stype == cpu_to_be32(ST_ROOT)) {
c1618208 FF	187	affs_secs_to_datestamp(inode->i_mtime.tv_sec,
c1618208 FF	188	&AFFS_ROOT_TAIL(sb, bh)->root_change);
1da177e4 LT	189	} else {
	190	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	191	tail->size = cpu_to_be32(inode->i_size);
c1618208	192	affs_secs_to_datestamp(inode->i_mtime.tv_sec, &tail->change);
1da177e4	193	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
8fed10be EB	194	uid = i_uid_read(inode);
8fed10be EB	195	gid = i_gid_read(inode);
79bda4d5	196	if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
8fed10be EB	197	if (uid == 0 \|\| uid == 0xFFFF)
	198	uid = uid ^ ~0;
	199	if (gid == 0 \|\| gid == 0xFFFF)
	200	gid = gid ^ ~0;
1da177e4	201	}
79bda4d5	202	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
1da177e4	203	tail->uid = cpu_to_be16(uid);
79bda4d5	204	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
1da177e4 LT	205	tail->gid = cpu_to_be16(gid);
	206	}
	207	}
	208	affs_fix_checksum(sb, bh);
	209	mark_buffer_dirty_inode(bh, inode);
	210	affs_brelse(bh);
	211	affs_free_prealloc(inode);
	212	return 0;
	213	}
	214
	215	int
	216	affs_notify_change(struct dentry dentry, struct iattr attr)
	217	{
2b0143b5	218	struct inode *inode = d_inode(dentry);
1da177e4 LT	219	int error;
1da177e4 LT	220
9606d9aa	221	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
1da177e4	222
31051c85	223	error = setattr_prepare(dentry, attr);
1da177e4 LT	224	if (error)
	225	goto out;
	226
a0016ff2	227	if (((attr->ia_valid & ATTR_UID) &&
79bda4d5	228	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) \|\|
a0016ff2	229	((attr->ia_valid & ATTR_GID) &&
79bda4d5	230	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) \|\|
1da177e4	231	((attr->ia_valid & ATTR_MODE) &&
a0016ff2 FF	232	(AFFS_SB(inode->i_sb)->s_flags &
a0016ff2 FF	233	(AFFS_MOUNT_SF_SETMODE \| AFFS_MOUNT_SF_IMMUTABLE)))) {
79bda4d5	234	if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
1da177e4 LT	235	error = -EPERM;
	236	goto out;
	237	}
	238
1025774c CH	239	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	240	attr->ia_size != i_size_read(inode)) {
1dc1834f	241	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	242	if (error)
1025774c CH	243	return error;
1dc1834f MS	244
	245	truncate_setsize(inode, attr->ia_size);
	246	affs_truncate(inode);
1025774c CH	247	}
	248
	249	setattr_copy(inode, attr);
	250	mark_inode_dirty(inode);
	251
	252	if (attr->ia_valid & ATTR_MODE)
c1618208	253	affs_mode_to_prot(inode);
1da177e4 LT	254	out:
	255	return error;
	256	}
	257
1da177e4	258	void
f053ddde	259	affs_evict_inode(struct inode *inode)
1da177e4	260	{
dca3c336	261	unsigned long cache_page;
9606d9aa FF	262	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
9606d9aa FF	263	inode->i_ino, inode->i_nlink);
91b0abe3	264	truncate_inode_pages_final(&inode->i_data);
1da177e4	265
f053ddde AV	266	if (!inode->i_nlink) {
	267	inode->i_size = 0;
	268	affs_truncate(inode);
	269	}
dca3c336	270
f053ddde	271	invalidate_inode_buffers(inode);
dbd5768f	272	clear_inode(inode);
dca3c336 RZ	273	affs_free_prealloc(inode);
dca3c336 RZ	274	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4	275	if (cache_page) {
9606d9aa	276	pr_debug("freeing ext cache\n");
1da177e4 LT	277	AFFS_I(inode)->i_lc = NULL;
	278	AFFS_I(inode)->i_ac = NULL;
	279	free_page(cache_page);
	280	}
	281	affs_brelse(AFFS_I(inode)->i_ext_bh);
	282	AFFS_I(inode)->i_ext_last = ~1;
	283	AFFS_I(inode)->i_ext_bh = NULL;
f053ddde AV	284
	285	if (!inode->i_nlink)
	286	affs_free_block(inode->i_sb, inode->i_ino);
1da177e4 LT	287	}
	288
	289	struct inode *
	290	affs_new_inode(struct inode *dir)
	291	{
	292	struct super_block *sb = dir->i_sb;
	293	struct inode *inode;
	294	u32 block;
	295	struct buffer_head *bh;
	296
	297	if (!(inode = new_inode(sb)))
	298	goto err_inode;
	299
	300	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	301	goto err_block;
	302
	303	bh = affs_getzeroblk(sb, block);
	304	if (!bh)
	305	goto err_bh;
	306	mark_buffer_dirty_inode(bh, inode);
	307	affs_brelse(bh);
	308
21559981 DH	309	inode->i_uid = current_fsuid();
21559981 DH	310	inode->i_gid = current_fsgid();
1da177e4	311	inode->i_ino = block;
bfe86848	312	set_nlink(inode, 1);
02027d42	313	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
dca3c336	314	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	315	AFFS_I(inode)->i_blkcnt = 0;
	316	AFFS_I(inode)->i_lc = NULL;
	317	AFFS_I(inode)->i_lc_size = 0;
	318	AFFS_I(inode)->i_lc_shift = 0;
	319	AFFS_I(inode)->i_lc_mask = 0;
	320	AFFS_I(inode)->i_ac = NULL;
	321	AFFS_I(inode)->i_ext_bh = NULL;
	322	AFFS_I(inode)->mmu_private = 0;
	323	AFFS_I(inode)->i_protect = 0;
	324	AFFS_I(inode)->i_lastalloc = 0;
	325	AFFS_I(inode)->i_pa_cnt = 0;
	326	AFFS_I(inode)->i_extcnt = 1;
	327	AFFS_I(inode)->i_ext_last = ~1;
	328
	329	insert_inode_hash(inode);
	330
	331	return inode;
	332
	333	err_bh:
	334	affs_free_block(sb, block);
	335	err_block:
	336	iput(inode);
	337	err_inode:
	338	return NULL;
	339	}
	340
	341	/*
	342	* Add an entry to a directory. Create the header block
	343	* and insert it into the hash table.
	344	*/
	345
	346	int
	347	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	348	{
	349	struct super_block *sb = dir->i_sb;
	350	struct buffer_head *inode_bh = NULL;
78f444f6	351	struct buffer_head *bh;
1da177e4 LT	352	u32 block = 0;
	353	int retval;
	354
08fe100d GU	355	pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
08fe100d GU	356	dir->i_ino, inode->i_ino, dentry, type);
1da177e4 LT	357
	358	retval = -EIO;
	359	bh = affs_bread(sb, inode->i_ino);
	360	if (!bh)
	361	goto done;
	362
	363	affs_lock_link(inode);
	364	switch (type) {
	365	case ST_LINKFILE:
	366	case ST_LINKDIR:
1da177e4 LT	367	retval = -ENOSPC;
	368	block = affs_alloc_block(dir, dir->i_ino);
	369	if (!block)
	370	goto err;
	371	retval = -EIO;
dca3c336	372	inode_bh = bh;
1da177e4 LT	373	bh = affs_getzeroblk(sb, block);
	374	if (!bh)
	375	goto err;
	376	break;
	377	default:
	378	break;
	379	}
	380
	381	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	382	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	383	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	384	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	385	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	386
	387	if (inode_bh) {
	388	__be32 chain;
	389	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	390	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	391	AFFS_TAIL(sb, bh)->link_chain = chain;
	392	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	393	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	394	mark_buffer_dirty_inode(inode_bh, inode);
bfe86848	395	set_nlink(inode, 2);
7de9c6ee	396	ihold(inode);
1da177e4 LT	397	}
	398	affs_fix_checksum(sb, bh);
	399	mark_buffer_dirty_inode(bh, inode);
	400	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	401
	402	affs_lock_dir(dir);
	403	retval = affs_insert_hash(dir, bh);
	404	mark_buffer_dirty_inode(bh, inode);
	405	affs_unlock_dir(dir);
	406	affs_unlock_link(inode);
	407
	408	d_instantiate(dentry, inode);
	409	done:
	410	affs_brelse(inode_bh);
	411	affs_brelse(bh);
	412	return retval;
	413	err:
	414	if (block)
	415	affs_free_block(sb, block);
	416	affs_unlock_link(inode);
	417	goto done;
	418	}