[mirror_ubuntu-bionic-kernel.git] / fs / ufs / ialloc.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/fs/ufs/ialloc.c
 *
 * Copyright (c) 1998
 * Daniel Pirkl <daniel.pirkl@email.cz>
 * Charles University, Faculty of Mathematics and Physics
 *
 *  from
 *
 *  linux/fs/ext2/ialloc.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  BSD ufs-inspired inode and directory allocation by 
 *  Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
 *  Big-endian to little-endian byte-swapping/bitmaps by
 *        David S. Miller (davem@caip.rutgers.edu), 1995
 *
 * UFS2 write support added by
 * Evgeniy Dushistov <dushistov@mail.ru>, 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_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;
	
	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_cg_private_info * ucpi;
	struct ufs_cylinder_group * ucg;
	struct inode * inode;
	struct timespec64 ts;
	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;

	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(inode);
	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));
	if (insert_inode_locked(inode) < 0) {
		err = -EIO;
		goto failed;
	}
	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);
		ktime_get_real_ts64(&ts);
		ufs2_inode->ui_birthtime = cpu_to_fs64(sb, ts.tv_sec);
		ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, ts.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);
	unlock_new_inode(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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/fs/ufs/ialloc.c
	4	*
	5	* Copyright (c) 1998
	6	* Daniel Pirkl <daniel.pirkl@email.cz>
	7	* Charles University, Faculty of Mathematics and Physics
	8	*
	9	* from
	10	*
	11	* linux/fs/ext2/ialloc.c
	12	*
	13	* Copyright (C) 1992, 1993, 1994, 1995
	14	* Remy Card (card@masi.ibp.fr)
	15	* Laboratoire MASI - Institut Blaise Pascal
	16	* Universite Pierre et Marie Curie (Paris VI)
	17	*
	18	* BSD ufs-inspired inode and directory allocation by
	19	* Stephen Tweedie (sct@dcs.ed.ac.uk), 1993
	20	* Big-endian to little-endian byte-swapping/bitmaps by
	21	* David S. Miller (davem@caip.rutgers.edu), 1995
3313e292 ED	22	*
	23	* UFS2 write support added by
	24	* Evgeniy Dushistov <dushistov@mail.ru>, 2007
1da177e4 LT	25	*/
	26
	27	#include <linux/fs.h>
1da177e4 LT	28	#include <linux/time.h>
	29	#include <linux/stat.h>
	30	#include <linux/string.h>
1da177e4 LT	31	#include <linux/buffer_head.h>
	32	#include <linux/sched.h>
	33	#include <linux/bitops.h>
	34	#include <asm/byteorder.h>
	35
e5420598	36	#include "ufs_fs.h"
bcd6d4ec	37	#include "ufs.h"
1da177e4 LT	38	#include "swab.h"
	39	#include "util.h"
	40
1da177e4 LT	41	/*
	42	* NOTE! When we get the inode, we're the only people
	43	* that have access to it, and as such there are no
	44	* race conditions we have to worry about. The inode
	45	* is not on the hash-lists, and it cannot be reached
	46	* through the filesystem because the directory entry
	47	* has been deleted earlier.
	48	*
	49	* HOWEVER: we must make sure that we get no aliases,
	50	* which means that we have to call "clear_inode()"
	51	* _before_ we mark the inode not in use in the inode
	52	* bitmaps. Otherwise a newly created file might use
	53	* the same inode number (not actually the same pointer
	54	* though), and then we'd have two inodes sharing the
	55	* same inode number and space on the harddisk.
	56	*/
	57	void ufs_free_inode (struct inode * inode)
	58	{
	59	struct super_block * sb;
	60	struct ufs_sb_private_info * uspi;
1da177e4 LT	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;
1da177e4 LT	70
	71	ino = inode->i_ino;
	72
cdd9eefd	73	mutex_lock(&UFS_SB(sb)->s_lock);
1da177e4 LT	74
	75	if (!((ino > 1) && (ino < (uspi->s_ncg * uspi->s_ipg )))) {
	76	ufs_warning(sb, "ufs_free_inode", "reserved inode or nonexistent inode %u\n", ino);
cdd9eefd	77	mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4 LT	78	return;
	79	}
	80
	81	cg = ufs_inotocg (ino);
	82	bit = ufs_inotocgoff (ino);
	83	ucpi = ufs_load_cylinder (sb, cg);
	84	if (!ucpi) {
cdd9eefd	85	mutex_unlock(&UFS_SB(sb)->s_lock);
1da177e4 LT	86	return;
1da177e4 LT	87	}
9695ef16	88	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
1da177e4 LT	89	if (!ufs_cg_chkmagic(sb, ucg))
	90	ufs_panic (sb, "ufs_free_fragments", "internal error, bad cg magic number");
	91
	92	ucg->cg_time = cpu_to_fs32(sb, get_seconds());
	93
	94	is_directory = S_ISDIR(inode->i_mode);
	95
9695ef16	96	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
1da177e4 LT	97	ufs_error(sb, "ufs_free_inode", "bit already cleared for inode %u", ino);
1da177e4 LT	98	else {
9695ef16	99	ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
1da177e4 LT	100	if (ino < ucpi->c_irotor)
	101	ucpi->c_irotor = ino;
	102	fs32_add(sb, &ucg->cg_cs.cs_nifree, 1);
ee3ffd6c	103	uspi->cs_total.cs_nifree++;
1da177e4 LT	104	fs32_add(sb, &UFS_SB(sb)->fs_cs(cg).cs_nifree, 1);
	105
	106	if (is_directory) {
	107	fs32_sub(sb, &ucg->cg_cs.cs_ndir, 1);
ee3ffd6c	108	uspi->cs_total.cs_ndir--;
1da177e4 LT	109	fs32_sub(sb, &UFS_SB(sb)->fs_cs(cg).cs_ndir, 1);
	110	}
	111	}
	112
9695ef16 ED	113	ubh_mark_buffer_dirty (USPI_UBH(uspi));
9695ef16 ED	114	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
9cb569d6 CH	115	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	116	ubh_sync_block(UCPI_UBH(ucpi));
1da177e4	117
9e9ad5f4	118	ufs_mark_sb_dirty(sb);
cdd9eefd	119	mutex_unlock(&UFS_SB(sb)->s_lock);
abf5d15f	120	UFSD("EXIT\n");
1da177e4 LT	121	}
1da177e4 LT	122
3313e292 ED	123	/*
	124	* Nullify new chunk of inodes,
	125	* BSD people also set ui_gen field of inode
	126	* during nullification, but we not care about
	127	* that because of linux ufs do not support NFS
	128	*/
	129	static void ufs2_init_inodes_chunk(struct super_block *sb,
	130	struct ufs_cg_private_info *ucpi,
	131	struct ufs_cylinder_group *ucg)
	132	{
	133	struct buffer_head *bh;
	134	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
	135	sector_t beg = uspi->s_sbbase +
	136	ufs_inotofsba(ucpi->c_cgx * uspi->s_ipg +
	137	fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk));
	138	sector_t end = beg + uspi->s_fpb;
	139
	140	UFSD("ENTER cgno %d\n", ucpi->c_cgx);
	141
	142	for (; beg < end; ++beg) {
	143	bh = sb_getblk(sb, beg);
	144	lock_buffer(bh);
	145	memset(bh->b_data, 0, sb->s_blocksize);
	146	set_buffer_uptodate(bh);
	147	mark_buffer_dirty(bh);
	148	unlock_buffer(bh);
	149	if (sb->s_flags & MS_SYNCHRONOUS)
	150	sync_dirty_buffer(bh);
	151	brelse(bh);
	152	}
	153
	154	fs32_add(sb, &ucg->cg_u.cg_u2.cg_initediblk, uspi->s_inopb);
	155	ubh_mark_buffer_dirty(UCPI_UBH(ucpi));
9cb569d6 CH	156	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	157	ubh_sync_block(UCPI_UBH(ucpi));
3313e292 ED	158
	159	UFSD("EXIT\n");
	160	}
	161
1da177e4 LT	162	/*
	163	* There are two policies for allocating an inode. If the new inode is
	164	* a directory, then a forward search is made for a block group with both
	165	* free space and a low directory-to-inode ratio; if that fails, then of
	166	* the groups with above-average free space, that group with the fewest
	167	* directories already is chosen.
	168	*
	169	* For other inodes, search forward from the parent directory's block
	170	* group to find a free inode.
	171	*/
6a9a06d9	172	struct inode ufs_new_inode(struct inode dir, umode_t mode)
1da177e4 LT	173	{
	174	struct super_block * sb;
	175	struct ufs_sb_info * sbi;
	176	struct ufs_sb_private_info * uspi;
1da177e4 LT	177	struct ufs_cg_private_info * ucpi;
	178	struct ufs_cylinder_group * ucg;
	179	struct inode * inode;
a88e99e9	180	struct timespec64 ts;
1da177e4 LT	181	unsigned cg, bit, i, j, start;
1da177e4 LT	182	struct ufs_inode_info *ufsi;
3313e292	183	int err = -ENOSPC;
1da177e4	184
abf5d15f	185	UFSD("ENTER\n");
1da177e4 LT	186
	187	/* Cannot create files in a deleted directory */
	188	if (!dir \|\| !dir->i_nlink)
	189	return ERR_PTR(-EPERM);
	190	sb = dir->i_sb;
	191	inode = new_inode(sb);
	192	if (!inode)
	193	return ERR_PTR(-ENOMEM);
	194	ufsi = UFS_I(inode);
	195	sbi = UFS_SB(sb);
	196	uspi = sbi->s_uspi;
1da177e4	197
cdd9eefd	198	mutex_lock(&sbi->s_lock);
1da177e4 LT	199
	200	/*
	201	* Try to place the inode in its parent directory
	202	*/
	203	i = ufs_inotocg(dir->i_ino);
	204	if (sbi->fs_cs(i).cs_nifree) {
	205	cg = i;
	206	goto cg_found;
	207	}
	208
	209	/*
	210	* Use a quadratic hash to find a group with a free inode
	211	*/
	212	for ( j = 1; j < uspi->s_ncg; j <<= 1 ) {
	213	i += j;
	214	if (i >= uspi->s_ncg)
	215	i -= uspi->s_ncg;
	216	if (sbi->fs_cs(i).cs_nifree) {
	217	cg = i;
	218	goto cg_found;
	219	}
	220	}
	221
	222	/*
	223	* That failed: try linear search for a free inode
	224	*/
	225	i = ufs_inotocg(dir->i_ino) + 1;
	226	for (j = 2; j < uspi->s_ncg; j++) {
	227	i++;
	228	if (i >= uspi->s_ncg)
	229	i = 0;
	230	if (sbi->fs_cs(i).cs_nifree) {
	231	cg = i;
	232	goto cg_found;
	233	}
	234	}
3313e292	235
1da177e4 LT	236	goto failed;
	237
	238	cg_found:
	239	ucpi = ufs_load_cylinder (sb, cg);
3313e292 ED	240	if (!ucpi) {
3313e292 ED	241	err = -EIO;
1da177e4	242	goto failed;
3313e292	243	}
9695ef16	244	ucg = ubh_get_ucg(UCPI_UBH(ucpi));
1da177e4 LT	245	if (!ufs_cg_chkmagic(sb, ucg))
	246	ufs_panic (sb, "ufs_new_inode", "internal error, bad cg magic number");
	247
	248	start = ucpi->c_irotor;
9695ef16	249	bit = ubh_find_next_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, uspi->s_ipg, start);
1da177e4	250	if (!(bit < uspi->s_ipg)) {
9695ef16	251	bit = ubh_find_first_zero_bit (UCPI_UBH(ucpi), ucpi->c_iusedoff, start);
1da177e4 LT	252	if (!(bit < start)) {
	253	ufs_error (sb, "ufs_new_inode",
	254	"cylinder group %u corrupted - error in inode bitmap\n", cg);
3313e292	255	err = -EIO;
1da177e4 LT	256	goto failed;
	257	}
	258	}
abf5d15f	259	UFSD("start = %u, bit = %u, ipg = %u\n", start, bit, uspi->s_ipg);
9695ef16 ED	260	if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit))
9695ef16 ED	261	ubh_setbit (UCPI_UBH(ucpi), ucpi->c_iusedoff, bit);
1da177e4 LT	262	else {
1da177e4 LT	263	ufs_panic (sb, "ufs_new_inode", "internal error");
3313e292	264	err = -EIO;
1da177e4 LT	265	goto failed;
1da177e4 LT	266	}
3313e292 ED	267
	268	if (uspi->fs_magic == UFS2_MAGIC) {
	269	u32 initediblk = fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_initediblk);
	270
	271	if (bit + uspi->s_inopb > initediblk &&
	272	initediblk < fs32_to_cpu(sb, ucg->cg_u.cg_u2.cg_niblk))
	273	ufs2_init_inodes_chunk(sb, ucpi, ucg);
	274	}
	275
1da177e4	276	fs32_sub(sb, &ucg->cg_cs.cs_nifree, 1);
ee3ffd6c	277	uspi->cs_total.cs_nifree--;
1da177e4 LT	278	fs32_sub(sb, &sbi->fs_cs(cg).cs_nifree, 1);
	279
	280	if (S_ISDIR(mode)) {
	281	fs32_add(sb, &ucg->cg_cs.cs_ndir, 1);
ee3ffd6c	282	uspi->cs_total.cs_ndir++;
1da177e4 LT	283	fs32_add(sb, &sbi->fs_cs(cg).cs_ndir, 1);
1da177e4 LT	284	}
9695ef16 ED	285	ubh_mark_buffer_dirty (USPI_UBH(uspi));
9695ef16 ED	286	ubh_mark_buffer_dirty (UCPI_UBH(ucpi));
9cb569d6 CH	287	if (sb->s_flags & MS_SYNCHRONOUS)
9cb569d6 CH	288	ubh_sync_block(UCPI_UBH(ucpi));
9e9ad5f4	289	ufs_mark_sb_dirty(sb);
1da177e4	290
3313e292	291	inode->i_ino = cg * uspi->s_ipg + bit;
be8ded59	292	inode_init_owner(inode, dir, mode);
1da177e4	293	inode->i_blocks = 0;
3313e292	294	inode->i_generation = 0;
02027d42	295	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
1da177e4 LT	296	ufsi->i_flags = UFS_I(dir)->i_flags;
1da177e4 LT	297	ufsi->i_lastfrag = 0;
1da177e4 LT	298	ufsi->i_shadow = 0;
	299	ufsi->i_osync = 0;
	300	ufsi->i_oeftflag = 0;
dd187a26	301	ufsi->i_dir_start_lookup = 0;
1da177e4	302	memset(&ufsi->i_u1, 0, sizeof(ufsi->i_u1));
e4502c63 AV	303	if (insert_inode_locked(inode) < 0) {
	304	err = -EIO;
	305	goto failed;
	306	}
1da177e4 LT	307	mark_inode_dirty(inode);
1da177e4 LT	308
3313e292 ED	309	if (uspi->fs_magic == UFS2_MAGIC) {
	310	struct buffer_head *bh;
	311	struct ufs2_inode *ufs2_inode;
	312
	313	/*
	314	* setup birth date, we do it here because of there is no sense
	315	* to hold it in struct ufs_inode_info, and lose 64 bit
	316	*/
	317	bh = sb_bread(sb, uspi->s_sbbase + ufs_inotofsba(inode->i_ino));
	318	if (!bh) {
	319	ufs_warning(sb, "ufs_read_inode",
	320	"unable to read inode %lu\n",
	321	inode->i_ino);
	322	err = -EIO;
	323	goto fail_remove_inode;
	324	}
	325	lock_buffer(bh);
	326	ufs2_inode = (struct ufs2_inode *)bh->b_data;
	327	ufs2_inode += ufs_inotofsbo(inode->i_ino);
a88e99e9 DD	328	ktime_get_real_ts64(&ts);
	329	ufs2_inode->ui_birthtime = cpu_to_fs64(sb, ts.tv_sec);
	330	ufs2_inode->ui_birthnsec = cpu_to_fs32(sb, ts.tv_nsec);
3313e292 ED	331	mark_buffer_dirty(bh);
	332	unlock_buffer(bh);
	333	if (sb->s_flags & MS_SYNCHRONOUS)
	334	sync_dirty_buffer(bh);
	335	brelse(bh);
	336	}
cdd9eefd	337	mutex_unlock(&sbi->s_lock);
1da177e4	338
abf5d15f ED	339	UFSD("allocating inode %lu\n", inode->i_ino);
abf5d15f ED	340	UFSD("EXIT\n");
1da177e4 LT	341	return inode;
1da177e4 LT	342
3313e292	343	fail_remove_inode:
cdd9eefd	344	mutex_unlock(&sbi->s_lock);
6d6b77f1	345	clear_nlink(inode);
e4502c63	346	unlock_new_inode(inode);
3313e292 ED	347	iput(inode);
	348	UFSD("EXIT (FAILED): err %d\n", err);
	349	return ERR_PTR(err);
1da177e4	350	failed:
cdd9eefd	351	mutex_unlock(&sbi->s_lock);
1da177e4 LT	352	make_bad_inode(inode);
1da177e4 LT	353	iput (inode);
3313e292 ED	354	UFSD("EXIT (FAILED): err %d\n", err);
3313e292 ED	355	return ERR_PTR(err);
1da177e4	356	}