[mirror_ubuntu-hirsute-kernel.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/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;
		/* 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>
5b825c3a	13	#include <linux/cred.h>
5a0e3ad6	14	#include <linux/gfp.h>
1da177e4 LT	15	#include "affs.h"
1da177e4 LT	16
210f8559	17	struct inode affs_iget(struct super_block sb, unsigned long ino)
1da177e4	18	{
1da177e4 LT	19	struct affs_sb_info *sbi = AFFS_SB(sb);
1da177e4 LT	20	struct buffer_head *bh;
1da177e4	21	struct affs_tail *tail;
210f8559	22	struct inode *inode;
1da177e4 LT	23	u32 block;
	24	u32 size;
	25	u32 prot;
	26	u16 id;
	27
210f8559 DH	28	inode = iget_locked(sb, ino);
	29	if (!inode)
	30	return ERR_PTR(-ENOMEM);
	31	if (!(inode->i_state & I_NEW))
	32	return inode;
	33
9606d9aa	34	pr_debug("affs_iget(%lu)\n", inode->i_ino);
1da177e4 LT	35
	36	block = inode->i_ino;
	37	bh = affs_bread(sb, block);
	38	if (!bh) {
	39	affs_warning(sb, "read_inode", "Cannot read block %d", block);
	40	goto bad_inode;
	41	}
	42	if (affs_checksum_block(sb, bh) \|\| be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) {
	43	affs_warning(sb,"read_inode",
	44	"Checksum or type (ptype=%d) error on inode %d",
	45	AFFS_HEAD(bh)->ptype, block);
	46	goto bad_inode;
	47	}
	48
1da177e4 LT	49	tail = AFFS_TAIL(sb, bh);
	50	prot = be32_to_cpu(tail->protect);
	51
	52	inode->i_size = 0;
bfe86848	53	set_nlink(inode, 1);
1da177e4 LT	54	inode->i_mode = 0;
	55	AFFS_I(inode)->i_extcnt = 1;
	56	AFFS_I(inode)->i_ext_last = ~1;
	57	AFFS_I(inode)->i_protect = prot;
dca3c336	58	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	59	AFFS_I(inode)->i_blkcnt = 0;
	60	AFFS_I(inode)->i_lc = NULL;
	61	AFFS_I(inode)->i_lc_size = 0;
	62	AFFS_I(inode)->i_lc_shift = 0;
	63	AFFS_I(inode)->i_lc_mask = 0;
	64	AFFS_I(inode)->i_ac = NULL;
	65	AFFS_I(inode)->i_ext_bh = NULL;
	66	AFFS_I(inode)->mmu_private = 0;
	67	AFFS_I(inode)->i_lastalloc = 0;
	68	AFFS_I(inode)->i_pa_cnt = 0;
	69
79bda4d5	70	if (affs_test_opt(sbi->s_flags, SF_SETMODE))
1da177e4 LT	71	inode->i_mode = sbi->s_mode;
1da177e4 LT	72	else
c1618208	73	inode->i_mode = affs_prot_to_mode(prot);
1da177e4 LT	74
1da177e4 LT	75	id = be16_to_cpu(tail->uid);
79bda4d5	76	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETUID))
1da177e4	77	inode->i_uid = sbi->s_uid;
79bda4d5	78	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	79	i_uid_write(inode, 0);
1da177e4	80	else
8fed10be	81	i_uid_write(inode, id);
1da177e4 LT	82
1da177e4 LT	83	id = be16_to_cpu(tail->gid);
79bda4d5	84	if (id == 0 \|\| affs_test_opt(sbi->s_flags, SF_SETGID))
1da177e4	85	inode->i_gid = sbi->s_gid;
79bda4d5	86	else if (id == 0xFFFF && affs_test_opt(sbi->s_flags, SF_MUFS))
8fed10be	87	i_gid_write(inode, 0);
1da177e4	88	else
8fed10be	89	i_gid_write(inode, id);
1da177e4 LT	90
	91	switch (be32_to_cpu(tail->stype)) {
	92	case ST_ROOT:
	93	inode->i_uid = sbi->s_uid;
	94	inode->i_gid = sbi->s_gid;
	95	/* fall through */
	96	case ST_USERDIR:
	97	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
79bda4d5	98	affs_test_opt(sbi->s_flags, SF_SETMODE)) {
1da177e4 LT	99	if (inode->i_mode & S_IRUSR)
	100	inode->i_mode \|= S_IXUSR;
	101	if (inode->i_mode & S_IRGRP)
	102	inode->i_mode \|= S_IXGRP;
	103	if (inode->i_mode & S_IROTH)
	104	inode->i_mode \|= S_IXOTH;
	105	inode->i_mode \|= S_IFDIR;
	106	} else
	107	inode->i_mode = S_IRUGO \| S_IXUGO \| S_IWUSR \| S_IFDIR;
1da177e4 LT	108	/* Maybe it should be controlled by mount parameter? */
	109	//inode->i_mode \|= S_ISVTX;
	110	inode->i_op = &affs_dir_inode_operations;
	111	inode->i_fop = &affs_dir_operations;
	112	break;
	113	case ST_LINKDIR:
	114	#if 0
	115	affs_warning(sb, "read_inode", "inode is LINKDIR");
	116	goto bad_inode;
	117	#else
	118	inode->i_mode \|= S_IFDIR;
c765d479	119	/* ... and leave ->i_op and ->i_fop pointing to empty */
1da177e4 LT	120	break;
	121	#endif
	122	case ST_LINKFILE:
	123	affs_warning(sb, "read_inode", "inode is LINKFILE");
	124	goto bad_inode;
	125	case ST_FILE:
	126	size = be32_to_cpu(tail->size);
	127	inode->i_mode \|= S_IFREG;
	128	AFFS_I(inode)->mmu_private = inode->i_size = size;
	129	if (inode->i_size) {
	130	AFFS_I(inode)->i_blkcnt = (size - 1) /
	131	sbi->s_data_blksize + 1;
	132	AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) /
	133	sbi->s_hashsize + 1;
	134	}
	135	if (tail->link_chain)
bfe86848	136	set_nlink(inode, 2);
79bda4d5	137	inode->i_mapping->a_ops = affs_test_opt(sbi->s_flags, SF_OFS) ?
a0016ff2	138	&affs_aops_ofs : &affs_aops;
1da177e4 LT	139	inode->i_op = &affs_file_inode_operations;
	140	inode->i_fop = &affs_file_operations;
	141	break;
	142	case ST_SOFTLINK:
	143	inode->i_mode \|= S_IFLNK;
21fc61c7	144	inode_nohighmem(inode);
1da177e4 LT	145	inode->i_op = &affs_symlink_inode_operations;
	146	inode->i_data.a_ops = &affs_symlink_aops;
	147	break;
	148	}
	149
	150	inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec
	151	= (be32_to_cpu(tail->change.days) * (24 * 60 * 60) +
	152	be32_to_cpu(tail->change.mins) * 60 +
	153	be32_to_cpu(tail->change.ticks) / 50 +
	154	((8 * 365 + 2) * 24 * 60 * 60)) +
	155	sys_tz.tz_minuteswest * 60;
	156	inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0;
	157	affs_brelse(bh);
210f8559 DH	158	unlock_new_inode(inode);
210f8559 DH	159	return inode;
1da177e4 LT	160
1da177e4 LT	161	bad_inode:
1da177e4	162	affs_brelse(bh);
210f8559 DH	163	iget_failed(inode);
210f8559 DH	164	return ERR_PTR(-EIO);
1da177e4 LT	165	}
	166
	167	int
a9185b41	168	affs_write_inode(struct inode inode, struct writeback_control wbc)
1da177e4 LT	169	{
	170	struct super_block *sb = inode->i_sb;
	171	struct buffer_head *bh;
	172	struct affs_tail *tail;
	173	uid_t uid;
	174	gid_t gid;
	175
9606d9aa	176	pr_debug("write_inode(%lu)\n", inode->i_ino);
1da177e4 LT	177
	178	if (!inode->i_nlink)
	179	// possibly free block
	180	return 0;
	181	bh = affs_bread(sb, inode->i_ino);
	182	if (!bh) {
	183	affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino);
	184	return -EIO;
	185	}
	186	tail = AFFS_TAIL(sb, bh);
	187	if (tail->stype == cpu_to_be32(ST_ROOT)) {
c1618208 FF	188	affs_secs_to_datestamp(inode->i_mtime.tv_sec,
c1618208 FF	189	&AFFS_ROOT_TAIL(sb, bh)->root_change);
1da177e4 LT	190	} else {
	191	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	192	tail->size = cpu_to_be32(inode->i_size);
c1618208	193	affs_secs_to_datestamp(inode->i_mtime.tv_sec, &tail->change);
1da177e4	194	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
8fed10be EB	195	uid = i_uid_read(inode);
8fed10be EB	196	gid = i_gid_read(inode);
79bda4d5	197	if (affs_test_opt(AFFS_SB(sb)->s_flags, SF_MUFS)) {
8fed10be EB	198	if (uid == 0 \|\| uid == 0xFFFF)
	199	uid = uid ^ ~0;
	200	if (gid == 0 \|\| gid == 0xFFFF)
	201	gid = gid ^ ~0;
1da177e4	202	}
79bda4d5	203	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETUID))
1da177e4	204	tail->uid = cpu_to_be16(uid);
79bda4d5	205	if (!affs_test_opt(AFFS_SB(sb)->s_flags, SF_SETGID))
1da177e4 LT	206	tail->gid = cpu_to_be16(gid);
	207	}
	208	}
	209	affs_fix_checksum(sb, bh);
	210	mark_buffer_dirty_inode(bh, inode);
	211	affs_brelse(bh);
	212	affs_free_prealloc(inode);
	213	return 0;
	214	}
	215
	216	int
	217	affs_notify_change(struct dentry dentry, struct iattr attr)
	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
31051c85	224	error = setattr_prepare(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	}
	249
	250	setattr_copy(inode, attr);
	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);
02027d42	314	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(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	}