[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;

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 (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("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("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("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_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("%s(dir=%u, inode=%u, \"%pd\", type=%d)\n",
		 __func__, (u32)dir->i_ino,
	         (u32)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
754661f1	16	extern const struct inode_operations affs_symlink_inode_operations;
1da177e4	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
	71	if (sbi->s_flags & SF_SETMODE)
	72	inode->i_mode = sbi->s_mode;
	73	else
	74	inode->i_mode = prot_to_mode(prot);
	75
	76	id = be16_to_cpu(tail->uid);
	77	if (id == 0 \|\| sbi->s_flags & SF_SETUID)
	78	inode->i_uid = sbi->s_uid;
	79	else if (id == 0xFFFF && 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
	84	id = be16_to_cpu(tail->gid);
	85	if (id == 0 \|\| sbi->s_flags & SF_SETGID)
	86	inode->i_gid = sbi->s_gid;
	87	else if (id == 0xFFFF && 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;
	96	/* fall through */
	97	case ST_USERDIR:
	98	if (be32_to_cpu(tail->stype) == ST_USERDIR \|\|
	99	sbi->s_flags & SF_SETMODE) {
	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);
1da177e4 LT	138	inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops;
	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;
	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)) {
	187	secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change);
	188	} else {
	189	tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect);
	190	tail->size = cpu_to_be32(inode->i_size);
	191	secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change);
	192	if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) {
8fed10be EB	193	uid = i_uid_read(inode);
8fed10be EB	194	gid = i_gid_read(inode);
1da177e4	195	if (AFFS_SB(sb)->s_flags & SF_MUFS) {
8fed10be EB	196	if (uid == 0 \|\| uid == 0xFFFF)
	197	uid = uid ^ ~0;
	198	if (gid == 0 \|\| gid == 0xFFFF)
	199	gid = gid ^ ~0;
1da177e4 LT	200	}
	201	if (!(AFFS_SB(sb)->s_flags & SF_SETUID))
	202	tail->uid = cpu_to_be16(uid);
	203	if (!(AFFS_SB(sb)->s_flags & SF_SETGID))
	204	tail->gid = cpu_to_be16(gid);
	205	}
	206	}
	207	affs_fix_checksum(sb, bh);
	208	mark_buffer_dirty_inode(bh, inode);
	209	affs_brelse(bh);
	210	affs_free_prealloc(inode);
	211	return 0;
	212	}
	213
	214	int
	215	affs_notify_change(struct dentry dentry, struct iattr attr)
	216	{
	217	struct inode *inode = dentry->d_inode;
	218	int error;
	219
9606d9aa	220	pr_debug("notify_change(%lu,0x%x)\n", inode->i_ino, attr->ia_valid);
1da177e4 LT	221
	222	error = inode_change_ok(inode,attr);
	223	if (error)
	224	goto out;
	225
	226	if (((attr->ia_valid & ATTR_UID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETUID)) \|\|
	227	((attr->ia_valid & ATTR_GID) && (AFFS_SB(inode->i_sb)->s_flags & SF_SETGID)) \|\|
	228	((attr->ia_valid & ATTR_MODE) &&
	229	(AFFS_SB(inode->i_sb)->s_flags & (SF_SETMODE \| SF_IMMUTABLE)))) {
	230	if (!(AFFS_SB(inode->i_sb)->s_flags & SF_QUIET))
	231	error = -EPERM;
	232	goto out;
	233	}
	234
1025774c CH	235	if ((attr->ia_valid & ATTR_SIZE) &&
1025774c CH	236	attr->ia_size != i_size_read(inode)) {
1dc1834f	237	error = inode_newsize_ok(inode, attr->ia_size);
1025774c CH	238	if (error)
1025774c CH	239	return error;
1dc1834f MS	240
	241	truncate_setsize(inode, attr->ia_size);
	242	affs_truncate(inode);
1025774c CH	243	}
	244
	245	setattr_copy(inode, attr);
	246	mark_inode_dirty(inode);
	247
	248	if (attr->ia_valid & ATTR_MODE)
1da177e4 LT	249	mode_to_prot(inode);
	250	out:
	251	return error;
	252	}
	253
1da177e4	254	void
f053ddde	255	affs_evict_inode(struct inode *inode)
1da177e4	256	{
dca3c336	257	unsigned long cache_page;
9606d9aa FF	258	pr_debug("evict_inode(ino=%lu, nlink=%u)\n",
9606d9aa FF	259	inode->i_ino, inode->i_nlink);
91b0abe3	260	truncate_inode_pages_final(&inode->i_data);
1da177e4	261
f053ddde AV	262	if (!inode->i_nlink) {
	263	inode->i_size = 0;
	264	affs_truncate(inode);
	265	}
dca3c336	266
f053ddde	267	invalidate_inode_buffers(inode);
dbd5768f	268	clear_inode(inode);
dca3c336 RZ	269	affs_free_prealloc(inode);
dca3c336 RZ	270	cache_page = (unsigned long)AFFS_I(inode)->i_lc;
1da177e4	271	if (cache_page) {
9606d9aa	272	pr_debug("freeing ext cache\n");
1da177e4 LT	273	AFFS_I(inode)->i_lc = NULL;
	274	AFFS_I(inode)->i_ac = NULL;
	275	free_page(cache_page);
	276	}
	277	affs_brelse(AFFS_I(inode)->i_ext_bh);
	278	AFFS_I(inode)->i_ext_last = ~1;
	279	AFFS_I(inode)->i_ext_bh = NULL;
f053ddde AV	280
	281	if (!inode->i_nlink)
	282	affs_free_block(inode->i_sb, inode->i_ino);
1da177e4 LT	283	}
	284
	285	struct inode *
	286	affs_new_inode(struct inode *dir)
	287	{
	288	struct super_block *sb = dir->i_sb;
	289	struct inode *inode;
	290	u32 block;
	291	struct buffer_head *bh;
	292
	293	if (!(inode = new_inode(sb)))
	294	goto err_inode;
	295
	296	if (!(block = affs_alloc_block(dir, dir->i_ino)))
	297	goto err_block;
	298
	299	bh = affs_getzeroblk(sb, block);
	300	if (!bh)
	301	goto err_bh;
	302	mark_buffer_dirty_inode(bh, inode);
	303	affs_brelse(bh);
	304
21559981 DH	305	inode->i_uid = current_fsuid();
21559981 DH	306	inode->i_gid = current_fsgid();
1da177e4	307	inode->i_ino = block;
bfe86848	308	set_nlink(inode, 1);
1da177e4	309	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
dca3c336	310	atomic_set(&AFFS_I(inode)->i_opencnt, 0);
1da177e4 LT	311	AFFS_I(inode)->i_blkcnt = 0;
	312	AFFS_I(inode)->i_lc = NULL;
	313	AFFS_I(inode)->i_lc_size = 0;
	314	AFFS_I(inode)->i_lc_shift = 0;
	315	AFFS_I(inode)->i_lc_mask = 0;
	316	AFFS_I(inode)->i_ac = NULL;
	317	AFFS_I(inode)->i_ext_bh = NULL;
	318	AFFS_I(inode)->mmu_private = 0;
	319	AFFS_I(inode)->i_protect = 0;
	320	AFFS_I(inode)->i_lastalloc = 0;
	321	AFFS_I(inode)->i_pa_cnt = 0;
	322	AFFS_I(inode)->i_extcnt = 1;
	323	AFFS_I(inode)->i_ext_last = ~1;
	324
	325	insert_inode_hash(inode);
	326
	327	return inode;
	328
	329	err_bh:
	330	affs_free_block(sb, block);
	331	err_block:
	332	iput(inode);
	333	err_inode:
	334	return NULL;
	335	}
	336
	337	/*
	338	* Add an entry to a directory. Create the header block
	339	* and insert it into the hash table.
	340	*/
	341
	342	int
	343	affs_add_entry(struct inode dir, struct inode inode, struct dentry *dentry, s32 type)
	344	{
	345	struct super_block *sb = dir->i_sb;
	346	struct buffer_head *inode_bh = NULL;
	347	struct buffer_head *bh = NULL;
	348	u32 block = 0;
	349	int retval;
	350
a455589f	351	pr_debug("%s(dir=%u, inode=%u, \"%pd\", type=%d)\n",
9606d9aa	352	__func__, (u32)dir->i_ino,
a455589f	353	(u32)inode->i_ino, dentry, type);
1da177e4 LT	354
	355	retval = -EIO;
	356	bh = affs_bread(sb, inode->i_ino);
	357	if (!bh)
	358	goto done;
	359
	360	affs_lock_link(inode);
	361	switch (type) {
	362	case ST_LINKFILE:
	363	case ST_LINKDIR:
1da177e4 LT	364	retval = -ENOSPC;
	365	block = affs_alloc_block(dir, dir->i_ino);
	366	if (!block)
	367	goto err;
	368	retval = -EIO;
dca3c336	369	inode_bh = bh;
1da177e4 LT	370	bh = affs_getzeroblk(sb, block);
	371	if (!bh)
	372	goto err;
	373	break;
	374	default:
	375	break;
	376	}
	377
	378	AFFS_HEAD(bh)->ptype = cpu_to_be32(T_SHORT);
	379	AFFS_HEAD(bh)->key = cpu_to_be32(bh->b_blocknr);
	380	affs_copy_name(AFFS_TAIL(sb, bh)->name, dentry);
	381	AFFS_TAIL(sb, bh)->stype = cpu_to_be32(type);
	382	AFFS_TAIL(sb, bh)->parent = cpu_to_be32(dir->i_ino);
	383
	384	if (inode_bh) {
	385	__be32 chain;
	386	chain = AFFS_TAIL(sb, inode_bh)->link_chain;
	387	AFFS_TAIL(sb, bh)->original = cpu_to_be32(inode->i_ino);
	388	AFFS_TAIL(sb, bh)->link_chain = chain;
	389	AFFS_TAIL(sb, inode_bh)->link_chain = cpu_to_be32(block);
	390	affs_adjust_checksum(inode_bh, block - be32_to_cpu(chain));
	391	mark_buffer_dirty_inode(inode_bh, inode);
bfe86848	392	set_nlink(inode, 2);
7de9c6ee	393	ihold(inode);
1da177e4 LT	394	}
	395	affs_fix_checksum(sb, bh);
	396	mark_buffer_dirty_inode(bh, inode);
	397	dentry->d_fsdata = (void *)(long)bh->b_blocknr;
	398
	399	affs_lock_dir(dir);
	400	retval = affs_insert_hash(dir, bh);
	401	mark_buffer_dirty_inode(bh, inode);
	402	affs_unlock_dir(dir);
	403	affs_unlock_link(inode);
	404
	405	d_instantiate(dentry, inode);
	406	done:
	407	affs_brelse(inode_bh);
	408	affs_brelse(bh);
	409	return retval;
	410	err:
	411	if (block)
	412	affs_free_block(sb, block);
	413	affs_unlock_link(inode);
	414	goto done;
	415	}