[linux.git] / fs / ufs / ialloc.c

/*
 *  linux/fs/ufs/ialloc.c
 *
 * Copyright (c) 1998
 * Daniel Pirkl <[email protected]>
 * Charles University, Faculty of Mathematics and Physics
 *
 *  from
 *
 *  linux/fs/ext2/ialloc.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card ([email protected])
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  BSD ufs-inspired inode and directory allocation by 
 *  Stephen Tweedie ([email protected]), 1993
 *  Big-endian to little-endian byte-swapping/bitmaps by
 *        David S. Miller ([email protected]), 1995
 *
 * UFS2 write support added by
 * Evgeniy Dushistov <[email protected]>, 2007
 */

#include <linux/fs.h>
#include <linux/time.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/sched.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>

#include "ufs_fs.h"
#include "ufs.h"
#include "swab.h"
#include "util.h"

/*
 * NOTE! When we get the inode, we're the only people
 * that have access to it, and as such there are no
 * race conditions we have to worry about. The inode
 * is not on the hash-lists, and it cannot be reached
 * through the filesystem because the directory entry
 * has been deleted earlier.
 *
 * HOWEVER: we must make sure that we get no aliases,
 * which means that we have to call "clear_inode()"
 * _before_ we mark the inode not in use in the inode
 * bitmaps. Otherwise a newly created file might use
 * the same inode number (not actually the same pointer
 * though), and then we'd have two inodes sharing the
 * same inode number and space on the harddisk.
 */
void ufs_free_inode (struct inode * inode)
{
	struct super_block * sb;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	int is_directory;
	unsigned ino, cg, bit;
	
	UFSD("ENTER, ino %lu\n", inode->i_ino);

	sb = inode->i_sb;
	uspi = UFS_SB(sb)->s_uspi;
	usb1 = ubh_get_usb_first(uspi);
	
	ino = inode->i_ino;

	mutex_lock(&UFS_SB(sb)->s_lock);

	if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
		ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return;
	}
	
	cg = ufs_inotocg (ino);
	bit = ufs_inotocgoff (ino);
	ucpi = ufs_load_cylinder (sb, cg);
	if (!ucpi) {
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return;
	}
	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg))
		ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");

	ucg->cg_time = cpu_to_fs32(sb, get_seconds());

	is_directory = S_ISDIR(inode->i_mode);

	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
		ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
	else {
		ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
		if (ino < ucpi->c_irotor)
			ucpi->c_irotor = ino;
		fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
		uspi->cs_total.cs_nifree++;
		fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);

		if (is_directory) {
			fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
			uspi->cs_total.cs_ndir--;
			fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
		}
	}

	ubh_mark_buffer_dirty (USPI_UBH(uspi));
	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
	if (sb->s_flags & MS_SYNCHRONOUS)
		ubh_sync_block(UCPI_UBH(ucpi));
	
	ufs_mark_sb_dirty(sb);
	mutex_unlock(&UFS_SB(sb)->s_lock);
	UFSD("EXIT\n");
}

/*
 * Nullify new chunk of inodes,
 * BSD people also set ui_gen field of inode
 * during nullification, but we not care about
 * that because of linux ufs do not support NFS
 */
static void ufs2_init_inodes_chunk(struct super_block *sb,
				   struct ufs_cg_private_info *ucpi,
				   struct ufs_cylinder_group *ucg)
{
	struct buffer_head *bh;
	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
	sector_t beg = uspi->s_sbbase +
		ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg +
			      fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk));
	sector_t end = beg + uspi->s_fpb;

	UFSD("ENTER cgno %d\n", ucpi->c_cgx);

	for (; beg < end; ++beg) {
		bh = sb_getblk(sb, beg);
		lock_buffer(bh);
		memset(bh->b_data, 0, sb->s_blocksize);
		set_buffer_uptodate(bh);
		mark_buffer_dirty(bh);
		unlock_buffer(bh);
		if (sb->s_flags & MS_SYNCHRONOUS)
			sync_dirty_buffer(bh);
		brelse(bh);
	}

	fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb);
	ubh_mark_buffer_dirty(UCPI_UBH(ucpi));
	if (sb->s_flags & MS_SYNCHRONOUS)
		ubh_sync_block(UCPI_UBH(ucpi));

	UFSD("EXIT\n");
}

/*
 * There are two policies for allocating an inode.  If the new inode is
 * a directory, then a forward search is made for a block group with both
 * free space and a low directory-to-inode ratio; if that fails, then of
 * the groups with above-average free space, that group with the fewest
 * directories already is chosen.
 *
 * For other inodes, search forward from the parent directory's block
 * group to find a free inode.
 */
struct inode *ufs_new_inode(struct inode *dir, umode_t mode)
{
	struct super_block * sb;
	struct ufs_sb_info * sbi;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	struct inode * inode;
	unsigned cg, bit, i, j, start;
	struct ufs_inode_info *ufsi;
	int err = -ENOSPC;

	UFSD("ENTER\n");
	
	/* Cannot create files in a deleted directory */
	if (!dir || !dir->i_nlink)
		return ERR_PTR(-EPERM);
	sb = dir->i_sb;
	inode = new_inode(sb);
	if (!inode)
		return ERR_PTR(-ENOMEM);
	ufsi = UFS_I(inode);
	sbi = UFS_SB(sb);
	uspi = sbi->s_uspi;
	usb1 = ubh_get_usb_first(uspi);

	mutex_lock(&sbi->s_lock);

	/*
	 * Try to place the inode in its parent directory
	 */
	i = ufs_inotocg(dir->i_ino);
	if (sbi->fs_cs(i).cs_nifree) {
		cg = i;
		goto cg_found;
	}

	/*
	 * Use a quadratic hash to find a group with a free inode
	 */
	for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
		i += j;
		if (i >= uspi->s_ncg)
			i -= uspi->s_ncg;
		if (sbi->fs_cs(i).cs_nifree) {
			cg = i;
			goto cg_found;
		}
	}

	/*
	 * That failed: try linear search for a free inode
	 */
	i = ufs_inotocg(dir->i_ino) + 1;
	for (j = 2; j < uspi->s_ncg; j++) {
		i++;
		if (i >= uspi->s_ncg)
			i = 0;
		if (sbi->fs_cs(i).cs_nifree) {
			cg = i;
			goto cg_found;
		}
	}

	goto failed;

cg_found:
	ucpi = ufs_load_cylinder (sb, cg);
	if (!ucpi) {
		err = -EIO;
		goto failed;
	}
	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
	if (!ufs_cg_chkmagic(sb, ucg)) 
		ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");

	start = ucpi->c_irotor;
	bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
	if (!(bit < uspi->s_ipg)) {
		bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
		if (!(bit < start)) {
			ufs_error (sb, "ufs_new_inode",
			    "cylinder group %u corrupted - error in inode bitmap\n", cg);
			err = -EIO;
			goto failed;
		}
	}
	UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
		ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
	else {
		ufs_panic (sb, "ufs_new_inode", "internal error");
		err = -EIO;
		goto failed;
	}

	if (uspi->fs_magic == UFS2_MAGIC) {
		u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);

		if (bit + uspi->s_inopb > initediblk &&
		    initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
			ufs2_init_inodes_chunk(sb, ucpi, ucg);
	}

	fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
	uspi->cs_total.cs_nifree--;
	fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
	
	if (S_ISDIR(mode)) {
		fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
		uspi->cs_total.cs_ndir++;
		fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
	}
	ubh_mark_buffer_dirty (USPI_UBH(uspi));
	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
	if (sb->s_flags & MS_SYNCHRONOUS)
		ubh_sync_block(UCPI_UBH(ucpi));
	ufs_mark_sb_dirty(sb);

	inode->i_ino = cg * uspi->s_ipg + bit;
	inode_init_owner(inode, dir, mode);
	inode->i_blocks = 0;
	inode->i_generation = 0;
	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
	ufsi->i_flags = UFS_I(dir)->i_flags;
	ufsi->i_lastfrag = 0;
	ufsi->i_shadow = 0;
	ufsi->i_osync = 0;
	ufsi->i_oeftflag = 0;
	ufsi->i_dir_start_lookup = 0;
	memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
	insert_inode_hash(inode);
	mark_inode_dirty(inode);

	if (uspi->fs_magic == UFS2_MAGIC) {
		struct buffer_head *bh;
		struct ufs2_inode *ufs2_inode;

		/*
		 * setup birth date, we do it here because of there is no sense
		 * to hold it in struct ufs_inode_info, and lose 64 bit
		 */
		bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
		if (!bh) {
			ufs_warning(sb, "ufs_read_inode",
				    "unable to read inode %lu\n",
				    inode->i_ino);
			err = -EIO;
			goto fail_remove_inode;
		}
		lock_buffer(bh);
		ufs2_inode = (struct ufs2_inode *)bh->b_data;
		ufs2_inode += ufs_inotofsbo(inode->i_ino);
		ufs2_inode->ui_birthtime = cpu_to_fs64(sb, CURRENT_TIME.tv_sec);
		ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, CURRENT_TIME.tv_nsec);
		mark_buffer_dirty(bh);
		unlock_buffer(bh);
		if (sb->s_flags & MS_SYNCHRONOUS)
			sync_dirty_buffer(bh);
		brelse(bh);
	}

	mutex_unlock(&sbi->s_lock);

	UFSD("allocating inode %lu\n", inode->i_ino);
	UFSD("EXIT\n");
	return inode;

fail_remove_inode:
	mutex_unlock(&sbi->s_lock);
	clear_nlink(inode);
	iput(inode);
	UFSD("EXIT (FAILED): err %d\n", err);
	return ERR_PTR(err);
failed:
	mutex_unlock(&sbi->s_lock);
	make_bad_inode(inode);
	iput (inode);
	UFSD("EXIT (FAILED): err %d\n", err);
	return ERR_PTR(err);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/ufs/ialloc.c
	3	*
	4	* Copyright (c) 1998
	5	* Daniel Pirkl <[email protected]>
	6	* Charles University, Faculty of Mathematics and Physics
	7	*
	8	* from
	9	*
	10	* linux/fs/ext2/ialloc.c
	11	*
	12	* Copyright (C) 1992, 1993, 1994, 1995
	13	* Remy Card ([email protected])
	14	* Laboratoire MASI - Institut Blaise Pascal
	15	* Universite Pierre et Marie Curie (Paris VI)
	16	*
	17	* BSD ufs-inspired inode and directory allocation by
	18	* Stephen Tweedie ([email protected]), 1993
	19	* Big-endian to little-endian byte-swapping/bitmaps by
	20	* David S. Miller ([email protected]), 1995
3313e292 ED	21	*
	22	* UFS2 write support added by
	23	* Evgeniy Dushistov <[email protected]>, 2007
1da177e4 LT	24	*/
	25
	26	#include <linux/fs.h>
1da177e4 LT	27	#include <linux/time.h>
	28	#include <linux/stat.h>
	29	#include <linux/string.h>
1da177e4 LT	30	#include <linux/buffer_head.h>
	31	#include <linux/sched.h>
	32	#include <linux/bitops.h>
	33	#include <asm/byteorder.h>
	34
e5420598	35	#include "ufs_fs.h"
bcd6d4ec	36	#include "ufs.h"
1da177e4 LT	37	#include "swab.h"
	38	#include "util.h"
	39
1da177e4 LT	40	/*
	41	* NOTE! When we get the inode, we're the only people
	42	* that have access to it, and as such there are no
	43	* race conditions we have to worry about. The inode
	44	* is not on the hash-lists, and it cannot be reached
	45	* through the filesystem because the directory entry
	46	* has been deleted earlier.
	47	*
	48	* HOWEVER: we must make sure that we get no aliases,
	49	* which means that we have to call "clear_inode()"
	50	* _before_ we mark the inode not in use in the inode
	51	* bitmaps. Otherwise a newly created file might use
	52	* the same inode number (not actually the same pointer
	53	* though), and then we'd have two inodes sharing the
	54	* same inode number and space on the harddisk.
	55	*/
	56	void ufs_free_inode (struct inode * inode)
	57	{
	58	struct super_block * sb;
	59	struct ufs_sb_private_info * uspi;
	60	struct ufs_super_block_first * usb1;
	61	struct ufs_cg_private_info * ucpi;
	62	struct ufs_cylinder_group * ucg;
	63	int is_directory;
	64	unsigned ino, cg, bit;
	65
abf5d15f	66	UFSD("ENTER, ino %lu\n", inode->i_ino);
1da177e4 LT	67
	68	sb = inode->i_sb;
	69	uspi = UFS_SB(sb)->s_uspi;
7b4ee73e	70	usb1 = ubh_get_usb_first(uspi);
1da177e4 LT	71
	72	ino = inode->i_ino;
	73
b6963327	74	mutex_lock(&UFS_SB(sb)->s_lock);
1da177e4 LT	75
	76	if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
	77	ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
b6963327	78	mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4 LT	79	return;
	80	}
	81
	82	cg = ufs_inotocg (ino);
	83	bit = ufs_inotocgoff (ino);
	84	ucpi = ufs_load_cylinder (sb, cg);
	85	if (!ucpi) {
b6963327	86	mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4 LT	87	return;
1da177e4 LT	88	}
9695ef16	89	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
1da177e4 LT	90	if (!ufs_cg_chkmagic(sb, ucg))
	91	ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");
	92
	93	ucg->cg_time = cpu_to_fs32(sb, get_seconds());
	94
	95	is_directory = S_ISDIR(inode->i_mode);
	96
9695ef16	97	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
1da177e4 LT	98	ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
1da177e4 LT	99	else {
9695ef16	100	ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
1da177e4 LT	101	if (ino < ucpi->c_irotor)
	102	ucpi->c_irotor = ino;
	103	fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
ee3ffd6c	104	uspi->cs_total.cs_nifree++;
1da177e4 LT	105	fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);
	106
	107	if (is_directory) {
	108	fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
ee3ffd6c	109	uspi->cs_total.cs_ndir--;
1da177e4 LT	110	fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
	111	}
	112	}
	113
9695ef16 ED	114	ubh_mark_buffer_dirty (USPI_UBH(uspi));
9695ef16 ED	115	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
9cb569d6 CH	116	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	117	ubh_sync_block(UCPI_UBH(ucpi));
1da177e4	118
9e9ad5f4	119	ufs_mark_sb_dirty(sb);
b6963327	120	mutex_unlock(&UFS_SB(sb)->s_lock);
abf5d15f	121	UFSD("EXIT\n");
1da177e4 LT	122	}
1da177e4 LT	123
3313e292 ED	124	/*
	125	* Nullify new chunk of inodes,
	126	* BSD people also set ui_gen field of inode
	127	* during nullification, but we not care about
	128	* that because of linux ufs do not support NFS
	129	*/
	130	static void ufs2_init_inodes_chunk(struct super_block *sb,
	131	struct ufs_cg_private_info *ucpi,
	132	struct ufs_cylinder_group *ucg)
	133	{
	134	struct buffer_head *bh;
	135	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
	136	sector_t beg = uspi->s_sbbase +
	137	ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg +
	138	fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk));
	139	sector_t end = beg + uspi->s_fpb;
	140
	141	UFSD("ENTER cgno %d\n", ucpi->c_cgx);
	142
	143	for (; beg < end; ++beg) {
	144	bh = sb_getblk(sb, beg);
	145	lock_buffer(bh);
	146	memset(bh->b_data, 0, sb->s_blocksize);
	147	set_buffer_uptodate(bh);
	148	mark_buffer_dirty(bh);
	149	unlock_buffer(bh);
	150	if (sb->s_flags & MS_SYNCHRONOUS)
	151	sync_dirty_buffer(bh);
	152	brelse(bh);
	153	}
	154
	155	fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb);
	156	ubh_mark_buffer_dirty(UCPI_UBH(ucpi));
9cb569d6 CH	157	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	158	ubh_sync_block(UCPI_UBH(ucpi));
3313e292 ED	159
	160	UFSD("EXIT\n");
	161	}
	162
1da177e4 LT	163	/*
	164	* There are two policies for allocating an inode. If the new inode is
	165	* a directory, then a forward search is made for a block group with both
	166	* free space and a low directory-to-inode ratio; if that fails, then of
	167	* the groups with above-average free space, that group with the fewest
	168	* directories already is chosen.
	169	*
	170	* For other inodes, search forward from the parent directory's block
	171	* group to find a free inode.
	172	*/
6a9a06d9	173	struct inode ufs_new_inode(struct inode dir, umode_t mode)
1da177e4 LT	174	{
	175	struct super_block * sb;
	176	struct ufs_sb_info * sbi;
	177	struct ufs_sb_private_info * uspi;
	178	struct ufs_super_block_first * usb1;
	179	struct ufs_cg_private_info * ucpi;
	180	struct ufs_cylinder_group * ucg;
	181	struct inode * inode;
	182	unsigned cg, bit, i, j, start;
	183	struct ufs_inode_info *ufsi;
3313e292	184	int err = -ENOSPC;
1da177e4	185
abf5d15f	186	UFSD("ENTER\n");
1da177e4 LT	187
	188	/* Cannot create files in a deleted directory */
	189	if (!dir \|\| !dir->i_nlink)
	190	return ERR_PTR(-EPERM);
	191	sb = dir->i_sb;
	192	inode = new_inode(sb);
	193	if (!inode)
	194	return ERR_PTR(-ENOMEM);
	195	ufsi = UFS_I(inode);
	196	sbi = UFS_SB(sb);
	197	uspi = sbi->s_uspi;
7b4ee73e	198	usb1 = ubh_get_usb_first(uspi);
1da177e4	199
b6963327	200	mutex_lock(&sbi->s_lock);
1da177e4 LT	201
	202	/*
	203	* Try to place the inode in its parent directory
	204	*/
	205	i = ufs_inotocg(dir->i_ino);
	206	if (sbi->fs_cs(i).cs_nifree) {
	207	cg = i;
	208	goto cg_found;
	209	}
	210
	211	/*
	212	* Use a quadratic hash to find a group with a free inode
	213	*/
	214	for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
	215	i += j;
	216	if (i >= uspi->s_ncg)
	217	i -= uspi->s_ncg;
	218	if (sbi->fs_cs(i).cs_nifree) {
	219	cg = i;
	220	goto cg_found;
	221	}
	222	}
	223
	224	/*
	225	* That failed: try linear search for a free inode
	226	*/
	227	i = ufs_inotocg(dir->i_ino) + 1;
	228	for (j = 2; j < uspi->s_ncg; j++) {
	229	i++;
	230	if (i >= uspi->s_ncg)
	231	i = 0;
	232	if (sbi->fs_cs(i).cs_nifree) {
	233	cg = i;
	234	goto cg_found;
	235	}
	236	}
3313e292	237
1da177e4 LT	238	goto failed;
	239
	240	cg_found:
	241	ucpi = ufs_load_cylinder (sb, cg);
3313e292 ED	242	if (!ucpi) {
3313e292 ED	243	err = -EIO;
1da177e4	244	goto failed;
3313e292	245	}
9695ef16	246	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
1da177e4 LT	247	if (!ufs_cg_chkmagic(sb, ucg))
	248	ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
	249
	250	start = ucpi->c_irotor;
9695ef16	251	bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
1da177e4	252	if (!(bit < uspi->s_ipg)) {
9695ef16	253	bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
1da177e4 LT	254	if (!(bit < start)) {
	255	ufs_error (sb, "ufs_new_inode",
	256	"cylinder group %u corrupted - error in inode bitmap\n", cg);
3313e292	257	err = -EIO;
1da177e4 LT	258	goto failed;
	259	}
	260	}
abf5d15f	261	UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
9695ef16 ED	262	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
9695ef16 ED	263	ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
1da177e4 LT	264	else {
1da177e4 LT	265	ufs_panic (sb, "ufs_new_inode", "internal error");
3313e292	266	err = -EIO;
1da177e4 LT	267	goto failed;
1da177e4 LT	268	}
3313e292 ED	269
	270	if (uspi->fs_magic == UFS2_MAGIC) {
	271	u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);
	272
	273	if (bit + uspi->s_inopb > initediblk &&
	274	initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
	275	ufs2_init_inodes_chunk(sb, ucpi, ucg);
	276	}
	277
1da177e4	278	fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
ee3ffd6c	279	uspi->cs_total.cs_nifree--;
1da177e4 LT	280	fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
	281
	282	if (S_ISDIR(mode)) {
	283	fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
ee3ffd6c	284	uspi->cs_total.cs_ndir++;
1da177e4 LT	285	fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
1da177e4 LT	286	}
9695ef16 ED	287	ubh_mark_buffer_dirty (USPI_UBH(uspi));
9695ef16 ED	288	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
9cb569d6 CH	289	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	290	ubh_sync_block(UCPI_UBH(ucpi));
9e9ad5f4	291	ufs_mark_sb_dirty(sb);
1da177e4	292
3313e292	293	inode->i_ino = cg * uspi->s_ipg + bit;
be8ded59	294	inode_init_owner(inode, dir, mode);
1da177e4	295	inode->i_blocks = 0;
3313e292	296	inode->i_generation = 0;
1da177e4 LT	297	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
	298	ufsi->i_flags = UFS_I(dir)->i_flags;
	299	ufsi->i_lastfrag = 0;
1da177e4 LT	300	ufsi->i_shadow = 0;
	301	ufsi->i_osync = 0;
	302	ufsi->i_oeftflag = 0;
dd187a26	303	ufsi->i_dir_start_lookup = 0;
1da177e4	304	memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
1da177e4 LT	305	insert_inode_hash(inode);
	306	mark_inode_dirty(inode);
	307
3313e292 ED	308	if (uspi->fs_magic == UFS2_MAGIC) {
	309	struct buffer_head *bh;
	310	struct ufs2_inode *ufs2_inode;
	311
	312	/*
	313	* setup birth date, we do it here because of there is no sense
	314	* to hold it in struct ufs_inode_info, and lose 64 bit
	315	*/
	316	bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
	317	if (!bh) {
	318	ufs_warning(sb, "ufs_read_inode",
	319	"unable to read inode %lu\n",
	320	inode->i_ino);
	321	err = -EIO;
	322	goto fail_remove_inode;
	323	}
	324	lock_buffer(bh);
	325	ufs2_inode = (struct ufs2_inode *)bh->b_data;
	326	ufs2_inode += ufs_inotofsbo(inode->i_ino);
2189850f ED	327	ufs2_inode->ui_birthtime = cpu_to_fs64(sb, CURRENT_TIME.tv_sec);
2189850f ED	328	ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, CURRENT_TIME.tv_nsec);
3313e292 ED	329	mark_buffer_dirty(bh);
	330	unlock_buffer(bh);
	331	if (sb->s_flags & MS_SYNCHRONOUS)
	332	sync_dirty_buffer(bh);
	333	brelse(bh);
	334	}
	335
b6963327	336	mutex_unlock(&sbi->s_lock);
1da177e4	337
abf5d15f ED	338	UFSD("allocating inode %lu\n", inode->i_ino);
abf5d15f ED	339	UFSD("EXIT\n");
1da177e4 LT	340	return inode;
1da177e4 LT	341
3313e292	342	fail_remove_inode:
b6963327	343	mutex_unlock(&sbi->s_lock);
6d6b77f1	344	clear_nlink(inode);
3313e292 ED	345	iput(inode);
	346	UFSD("EXIT (FAILED): err %d\n", err);
	347	return ERR_PTR(err);
1da177e4	348	failed:
b6963327	349	mutex_unlock(&sbi->s_lock);
1da177e4 LT	350	make_bad_inode(inode);
1da177e4 LT	351	iput (inode);
3313e292 ED	352	UFSD("EXIT (FAILED): err %d\n", err);
3313e292 ED	353	return ERR_PTR(err);
1da177e4	354	}