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

// SPDX-License-Identifier: GPL-2.0
/*
 *  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/cred.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;
		fallthrough;
	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_size = strlen((char *)AFFS_HEAD(bh)->table);
		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_set_mtime(inode,
			inode_set_atime(inode, inode_set_ctime(inode, (be32_to_cpu(tail->change.days) * 86400LL + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + AFFS_EPOCH_DELTA) + sys_tz.tz_minuteswest * 60, 0).tv_sec, 0).tv_sec,
			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_get_mtime_sec(inode),
				       &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_get_mtime_sec(inode),
				       &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 mnt_idmap *idmap, 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(&nop_mnt_idmap, 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(&nop_mnt_idmap, 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);
	simple_inode_init_ts(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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/fs/affs/inode.c
	4	*
	5	* (c) 1996 Hans-Joachim Widmaier - Rewritten
	6	*
	7	* (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
	8	*
	9	* (C) 1992 Eric Youngdale Modified for ISO9660 filesystem.
	10	*
	11	* (C) 1991 Linus Torvalds - minix filesystem
	12	*/
e8edc6e0	13	#include <linux/sched.h>
5b825c3a	14	#include <linux/cred.h>
5a0e3ad6	15	#include <linux/gfp.h>
1da177e4 LT	16	#include "affs.h"
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);
1da177e4 LT	21	struct buffer_head *bh;
1da177e4	22	struct affs_tail *tail;
210f8559	23	struct inode *inode;
1da177e4 LT	24	u32 block;
	25	u32 size;
	26	u32 prot;
	27	u16 id;
	28
210f8559 DH	29	inode = iget_locked(sb, ino);
	30	if (!inode)
	31	return ERR_PTR(-ENOMEM);
	32	if (!(inode->i_state & I_NEW))
	33	return inode;
	34
9606d9aa	35	pr_debug("affs_iget(%lu)\n", inode->i_ino);
1da177e4 LT	36
	37	block = inode->i_ino;
	38	bh = affs_bread(sb, block);
	39	if (!bh) {
	40	affs_warning(sb, "read_inode", "Cannot read block %d", block);
	41	goto bad_inode;
	42	}
	43	if (affs_checksum_block(sb, bh) \|\| be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
	44	affs_warning(sb,"read_inode",
	45	"Checksum or type (ptype=%d) error on inode %d",
	46	AFFS_HEAD(bh)->ptype, block);
	47	goto bad_inode;
	48	}
	49
1da177e4 LT	50	tail = AFFS_TAIL(sb, bh);
	51	prot = be32_to_cpu(tail->protect);
	52
	53	inode->i_size = 0;
bfe86848	54	set_nlink(inode, 1);
1da177e4 LT	55	inode->i_mode = 0;
	56	AFFS_I(inode)->i_extcnt = 1;
	57	AFFS_I(inode)->i_ext_last = ~1;
	58	AFFS_I(inode)->i_protect = prot;
dca3c336	59	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	60	AFFS_I(inode)->i_blkcnt = 0;
	61	AFFS_I(inode)->i_lc = NULL;
	62	AFFS_I(inode)->i_lc_size = 0;
	63	AFFS_I(inode)->i_lc_shift = 0;
	64	AFFS_I(inode)->i_lc_mask = 0;
	65	AFFS_I(inode)->i_ac = NULL;
	66	AFFS_I(inode)->i_ext_bh = NULL;
	67	AFFS_I(inode)->mmu_private = 0;
	68	AFFS_I(inode)->i_lastalloc = 0;
	69	AFFS_I(inode)->i_pa_cnt = 0;
	70
79bda4d5	71	if (affs_test_opt(sbi->s_flags, SF_SETMODE))
1da177e4 LT	72	inode->i_mode = sbi->s_mode;
1da177e4 LT	73	else
c1618208	74	inode->i_mode = affs_prot_to_mode(prot);
1da177e4 LT	75
1da177e4 LT	76	id = be16_to_cpu(tail->uid);
79bda4d5	77	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETUID))
1da177e4	78	inode->i_uid = sbi->s_uid;
79bda4d5	79	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	80	i_uid_write(inode, 0);
1da177e4	81	else
8fed10be	82	i_uid_write(inode, id);
1da177e4 LT	83
1da177e4 LT	84	id = be16_to_cpu(tail->gid);
79bda4d5	85	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETGID))
1da177e4	86	inode->i_gid = sbi->s_gid;
79bda4d5	87	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	88	i_gid_write(inode, 0);
1da177e4	89	else
8fed10be	90	i_gid_write(inode, id);
1da177e4 LT	91
	92	switch (be32_to_cpu(tail->stype)) {
	93	case ST_ROOT:
	94	inode->i_uid = sbi->s_uid;
	95	inode->i_gid = sbi->s_gid;
df561f66	96	fallthrough;
1da177e4 LT	97	case ST_USERDIR:
1da177e4 LT	98	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
79bda4d5	99	affs_test_opt(sbi->s_flags, SF_SETMODE)) {
1da177e4 LT	100	if (inode->i_mode & S_IRUSR)
	101	inode->i_mode \|= S_IXUSR;
	102	if (inode->i_mode & S_IRGRP)
	103	inode->i_mode \|= S_IXGRP;
	104	if (inode->i_mode & S_IROTH)
	105	inode->i_mode \|= S_IXOTH;
	106	inode->i_mode \|= S_IFDIR;
	107	} else
	108	inode->i_mode = S_IRUGO \| S_IXUGO \| S_IWUSR \| S_IFDIR;
1da177e4 LT	109	/* Maybe it should be controlled by mount parameter? */
	110	//inode->i_mode \|= S_ISVTX;
	111	inode->i_op = &affs_dir_inode_operations;
	112	inode->i_fop = &affs_dir_operations;
	113	break;
	114	case ST_LINKDIR:
	115	#if 0
	116	affs_warning(sb, "read_inode", "inode is LINKDIR");
	117	goto bad_inode;
	118	#else
	119	inode->i_mode \|= S_IFDIR;
c765d479	120	/* ... and leave ->i_op and ->i_fop pointing to empty */
1da177e4 LT	121	break;
	122	#endif
	123	case ST_LINKFILE:
	124	affs_warning(sb, "read_inode", "inode is LINKFILE");
	125	goto bad_inode;
	126	case ST_FILE:
	127	size = be32_to_cpu(tail->size);
	128	inode->i_mode \|= S_IFREG;
	129	AFFS_I(inode)->mmu_private = inode->i_size = size;
	130	if (inode->i_size) {
	131	AFFS_I(inode)->i_blkcnt = (size - 1) /
	132	sbi->s_data_blksize + 1;
	133	AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
	134	sbi->s_hashsize + 1;
	135	}
	136	if (tail->link_chain)
bfe86848	137	set_nlink(inode, 2);
79bda4d5	138	inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
a0016ff2	139	&affs_aops_ofs : &affs_aops;
1da177e4 LT	140	inode->i_op = &affs_file_inode_operations;
	141	inode->i_fop = &affs_file_operations;
	142	break;
	143	case ST_SOFTLINK:
f1bf9072	144	inode->i_size = strlen((char *)AFFS_HEAD(bh)->table);
1da177e4	145	inode->i_mode \|= S_IFLNK;
21fc61c7	146	inode_nohighmem(inode);
1da177e4 LT	147	inode->i_op = &affs_symlink_inode_operations;
	148	inode->i_data.a_ops = &affs_symlink_aops;
	149	break;
	150	}
	151
ea7719af JL	152	inode_set_mtime(inode,
	153	inode_set_atime(inode, inode_set_ctime(inode, (be32_to_cpu(tail->change.days) * 86400LL + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + AFFS_EPOCH_DELTA) + sys_tz.tz_minuteswest * 60, 0).tv_sec, 0).tv_sec,
	154	0);
1da177e4	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)) {
ea7719af	186	affs_secs_to_datestamp(inode_get_mtime_sec(inode),
c1618208	187	&AFFS_ROOT_TAIL(sb, bh)->root_change);
1da177e4 LT	188	} else {
	189	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	190	tail->size = cpu_to_be32(inode->i_size);
ea7719af JL	191	affs_secs_to_datestamp(inode_get_mtime_sec(inode),
ea7719af JL	192	&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
c1632a0f	216	affs_notify_change(struct mnt_idmap idmap, struct dentry dentry,
549c7297	217	struct iattr *attr)
1da177e4	218	{
2b0143b5	219	struct inode *inode = d_inode(dentry);
1da177e4 LT	220	int error;
1da177e4 LT	221
9606d9aa	222	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
1da177e4	223
c1632a0f	224	error = setattr_prepare(&nop_mnt_idmap, dentry, attr);
1da177e4 LT	225	if (error)
	226	goto out;
	227
a0016ff2	228	if (((attr->ia_valid & ATTR_UID) &&
79bda4d5	229	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETUID)) \|\|
a0016ff2	230	((attr->ia_valid & ATTR_GID) &&
79bda4d5	231	affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_SETGID)) \|\|
1da177e4	232	((attr->ia_valid & ATTR_MODE) &&
a0016ff2 FF	233	(AFFS_SB(inode->i_sb)->s_flags &
a0016ff2 FF	234	(AFFS_MOUNT_SF_SETMODE \| AFFS_MOUNT_SF_IMMUTABLE)))) {
79bda4d5	235	if (!affs_test_opt(AFFS_SB(inode->i_sb)->s_flags, SF_QUIET))
1da177e4 LT	236	error = -EPERM;
	237	goto out;
	238	}
	239
1025774c CH	240	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	241	attr->ia_size != i_size_read(inode)) {
1dc1834f	242	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	243	if (error)
1025774c CH	244	return error;
1dc1834f MS	245
	246	truncate_setsize(inode, attr->ia_size);
	247	affs_truncate(inode);
1025774c CH	248	}
1025774c CH	249
c1632a0f	250	setattr_copy(&nop_mnt_idmap, inode, attr);
1025774c CH	251	mark_inode_dirty(inode);
	252
	253	if (attr->ia_valid & ATTR_MODE)
c1618208	254	affs_mode_to_prot(inode);
1da177e4 LT	255	out:
	256	return error;
	257	}
	258
1da177e4	259	void
f053ddde	260	affs_evict_inode(struct inode *inode)
1da177e4	261	{
dca3c336	262	unsigned long cache_page;
9606d9aa FF	263	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
9606d9aa FF	264	inode->i_ino, inode->i_nlink);
91b0abe3	265	truncate_inode_pages_final(&inode->i_data);
1da177e4	266
f053ddde AV	267	if (!inode->i_nlink) {
	268	inode->i_size = 0;
	269	affs_truncate(inode);
	270	}
dca3c336	271
f053ddde	272	invalidate_inode_buffers(inode);
dbd5768f	273	clear_inode(inode);
dca3c336 RZ	274	affs_free_prealloc(inode);
dca3c336 RZ	275	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4	276	if (cache_page) {
9606d9aa	277	pr_debug("freeing ext cache\n");
1da177e4 LT	278	AFFS_I(inode)->i_lc = NULL;
	279	AFFS_I(inode)->i_ac = NULL;
	280	free_page(cache_page);
	281	}
	282	affs_brelse(AFFS_I(inode)->i_ext_bh);
	283	AFFS_I(inode)->i_ext_last = ~1;
	284	AFFS_I(inode)->i_ext_bh = NULL;
f053ddde AV	285
	286	if (!inode->i_nlink)
	287	affs_free_block(inode->i_sb, inode->i_ino);
1da177e4 LT	288	}
	289
	290	struct inode *
	291	affs_new_inode(struct inode *dir)
	292	{
	293	struct super_block *sb = dir->i_sb;
	294	struct inode *inode;
	295	u32 block;
	296	struct buffer_head *bh;
	297
	298	if (!(inode = new_inode(sb)))
	299	goto err_inode;
	300
	301	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	302	goto err_block;
	303
	304	bh = affs_getzeroblk(sb, block);
	305	if (!bh)
	306	goto err_bh;
	307	mark_buffer_dirty_inode(bh, inode);
	308	affs_brelse(bh);
	309
21559981 DH	310	inode->i_uid = current_fsuid();
21559981 DH	311	inode->i_gid = current_fsgid();
1da177e4	312	inode->i_ino = block;
bfe86848	313	set_nlink(inode, 1);
ea7719af	314	simple_inode_init_ts(inode);
dca3c336	315	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	316	AFFS_I(inode)->i_blkcnt = 0;
	317	AFFS_I(inode)->i_lc = NULL;
	318	AFFS_I(inode)->i_lc_size = 0;
	319	AFFS_I(inode)->i_lc_shift = 0;
	320	AFFS_I(inode)->i_lc_mask = 0;
	321	AFFS_I(inode)->i_ac = NULL;
	322	AFFS_I(inode)->i_ext_bh = NULL;
	323	AFFS_I(inode)->mmu_private = 0;
	324	AFFS_I(inode)->i_protect = 0;
	325	AFFS_I(inode)->i_lastalloc = 0;
	326	AFFS_I(inode)->i_pa_cnt = 0;
	327	AFFS_I(inode)->i_extcnt = 1;
	328	AFFS_I(inode)->i_ext_last = ~1;
	329
	330	insert_inode_hash(inode);
	331
	332	return inode;
	333
	334	err_bh:
	335	affs_free_block(sb, block);
	336	err_block:
	337	iput(inode);
	338	err_inode:
	339	return NULL;
	340	}
	341
	342	/*
	343	* Add an entry to a directory. Create the header block
	344	* and insert it into the hash table.
	345	*/
	346
	347	int
	348	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	349	{
	350	struct super_block *sb = dir->i_sb;
	351	struct buffer_head *inode_bh = NULL;
78f444f6	352	struct buffer_head *bh;
1da177e4 LT	353	u32 block = 0;
	354	int retval;
	355
08fe100d GU	356	pr_debug("%s(dir=%lu, inode=%lu, \"%pd\", type=%d)\n", __func__,
08fe100d GU	357	dir->i_ino, inode->i_ino, dentry, type);
1da177e4 LT	358
	359	retval = -EIO;
	360	bh = affs_bread(sb, inode->i_ino);
	361	if (!bh)
	362	goto done;
	363
	364	affs_lock_link(inode);
	365	switch (type) {
	366	case ST_LINKFILE:
	367	case ST_LINKDIR:
1da177e4 LT	368	retval = -ENOSPC;
	369	block = affs_alloc_block(dir, dir->i_ino);
	370	if (!block)
	371	goto err;
	372	retval = -EIO;
dca3c336	373	inode_bh = bh;
1da177e4 LT	374	bh = affs_getzeroblk(sb, block);
	375	if (!bh)
	376	goto err;
	377	break;
	378	default:
	379	break;
	380	}
	381
	382	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	383	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	384	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	385	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	386	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	387
	388	if (inode_bh) {
	389	__be32 chain;
	390	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	391	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	392	AFFS_TAIL(sb, bh)->link_chain = chain;
	393	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	394	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	395	mark_buffer_dirty_inode(inode_bh, inode);
bfe86848	396	set_nlink(inode, 2);
7de9c6ee	397	ihold(inode);
1da177e4 LT	398	}
	399	affs_fix_checksum(sb, bh);
	400	mark_buffer_dirty_inode(bh, inode);
	401	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	402
	403	affs_lock_dir(dir);
	404	retval = affs_insert_hash(dir, bh);
	405	mark_buffer_dirty_inode(bh, inode);
	406	affs_unlock_dir(dir);
	407	affs_unlock_link(inode);
	408
	409	d_instantiate(dentry, inode);
	410	done:
	411	affs_brelse(inode_bh);
	412	affs_brelse(bh);
	413	return retval;
	414	err:
	415	if (block)
	416	affs_free_block(sb, block);
	417	affs_unlock_link(inode);
	418	goto done;
	419	}