[net-next-2.6.git] / fs / jfs / jfs_inode.c

/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/fs.h>
#include <linux/quotaops.h>
#include "jfs_incore.h"
#include "jfs_inode.h"
#include "jfs_filsys.h"
#include "jfs_imap.h"
#include "jfs_dinode.h"
#include "jfs_debug.h"


void jfs_set_inode_flags(struct inode *inode)
{
	unsigned int flags = JFS_IP(inode)->mode2;

	inode->i_flags &= ~(S_IMMUTABLE | S_APPEND |
		S_NOATIME | S_DIRSYNC | S_SYNC);

	if (flags & JFS_IMMUTABLE_FL)
		inode->i_flags |= S_IMMUTABLE;
	if (flags & JFS_APPEND_FL)
		inode->i_flags |= S_APPEND;
	if (flags & JFS_NOATIME_FL)
		inode->i_flags |= S_NOATIME;
	if (flags & JFS_DIRSYNC_FL)
		inode->i_flags |= S_DIRSYNC;
	if (flags & JFS_SYNC_FL)
		inode->i_flags |= S_SYNC;
}

void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
{
	unsigned int flags = jfs_ip->vfs_inode.i_flags;

	jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL | JFS_APPEND_FL | JFS_NOATIME_FL |
			   JFS_DIRSYNC_FL | JFS_SYNC_FL);
	if (flags & S_IMMUTABLE)
		jfs_ip->mode2 |= JFS_IMMUTABLE_FL;
	if (flags & S_APPEND)
		jfs_ip->mode2 |= JFS_APPEND_FL;
	if (flags & S_NOATIME)
		jfs_ip->mode2 |= JFS_NOATIME_FL;
	if (flags & S_DIRSYNC)
		jfs_ip->mode2 |= JFS_DIRSYNC_FL;
	if (flags & S_SYNC)
		jfs_ip->mode2 |= JFS_SYNC_FL;
}

/*
 * NAME:	ialloc()
 *
 * FUNCTION:	Allocate a new inode
 *
 */
struct inode *ialloc(struct inode *parent, umode_t mode)
{
	struct super_block *sb = parent->i_sb;
	struct inode *inode;
	struct jfs_inode_info *jfs_inode;
	int rc;

	inode = new_inode(sb);
	if (!inode) {
		jfs_warn("ialloc: new_inode returned NULL!");
		rc = -ENOMEM;
		goto fail;
	}

	jfs_inode = JFS_IP(inode);

	rc = diAlloc(parent, S_ISDIR(mode), inode);
	if (rc) {
		jfs_warn("ialloc: diAlloc returned %d!", rc);
		if (rc == -EIO)
			make_bad_inode(inode);
		goto fail_put;
	}

	if (insert_inode_locked(inode) < 0) {
		rc = -EINVAL;
		goto fail_unlock;
	}

	inode->i_uid = current_fsuid();
	if (parent->i_mode & S_ISGID) {
		inode->i_gid = parent->i_gid;
		if (S_ISDIR(mode))
			mode |= S_ISGID;
	} else
		inode->i_gid = current_fsgid();

	/*
	 * New inodes need to save sane values on disk when
	 * uid & gid mount options are used
	 */
	jfs_inode->saved_uid = inode->i_uid;
	jfs_inode->saved_gid = inode->i_gid;

	/*
	 * Allocate inode to quota.
	 */
	dquot_initialize(inode);
	rc = dquot_alloc_inode(inode);
	if (rc)
		goto fail_drop;

	inode->i_mode = mode;
	/* inherit flags from parent */
	jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;

	if (S_ISDIR(mode)) {
		jfs_inode->mode2 |= IDIRECTORY;
		jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
	}
	else {
		jfs_inode->mode2 |= INLINEEA | ISPARSE;
		if (S_ISLNK(mode))
			jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL|JFS_APPEND_FL);
	}
	jfs_inode->mode2 |= mode;

	inode->i_blocks = 0;
	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
	jfs_inode->otime = inode->i_ctime.tv_sec;
	inode->i_generation = JFS_SBI(sb)->gengen++;

	jfs_inode->cflag = 0;

	/* Zero remaining fields */
	memset(&jfs_inode->acl, 0, sizeof(dxd_t));
	memset(&jfs_inode->ea, 0, sizeof(dxd_t));
	jfs_inode->next_index = 0;
	jfs_inode->acltype = 0;
	jfs_inode->btorder = 0;
	jfs_inode->btindex = 0;
	jfs_inode->bxflag = 0;
	jfs_inode->blid = 0;
	jfs_inode->atlhead = 0;
	jfs_inode->atltail = 0;
	jfs_inode->xtlid = 0;
	jfs_set_inode_flags(inode);

	jfs_info("ialloc returns inode = 0x%p\n", inode);

	return inode;

fail_drop:
	dquot_drop(inode);
	inode->i_flags |= S_NOQUOTA;
fail_unlock:
	inode->i_nlink = 0;
	unlock_new_inode(inode);
fail_put:
	iput(inode);
fail:
	return ERR_PTR(rc);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Copyright (C) International Business Machines Corp., 2000-2004
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
63f83c9f	6	* the Free Software Foundation; either version 2 of the License, or
1da177e4	7	* (at your option) any later version.
63f83c9f	8	*
1da177e4 LT	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	12	* the GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
63f83c9f	15	* along with this program; if not, write to the Free Software
1da177e4 LT	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	17	*/
	18
	19	#include <linux/fs.h>
	20	#include <linux/quotaops.h>
	21	#include "jfs_incore.h"
1868f4aa	22	#include "jfs_inode.h"
1da177e4 LT	23	#include "jfs_filsys.h"
	24	#include "jfs_imap.h"
	25	#include "jfs_dinode.h"
	26	#include "jfs_debug.h"
	27
fa3241d2 HP	28
	29	void jfs_set_inode_flags(struct inode *inode)
	30	{
	31	unsigned int flags = JFS_IP(inode)->mode2;
	32
	33	inode->i_flags &= ~(S_IMMUTABLE \| S_APPEND \|
	34	S_NOATIME \| S_DIRSYNC \| S_SYNC);
	35
	36	if (flags & JFS_IMMUTABLE_FL)
	37	inode->i_flags \|= S_IMMUTABLE;
	38	if (flags & JFS_APPEND_FL)
	39	inode->i_flags \|= S_APPEND;
	40	if (flags & JFS_NOATIME_FL)
	41	inode->i_flags \|= S_NOATIME;
	42	if (flags & JFS_DIRSYNC_FL)
	43	inode->i_flags \|= S_DIRSYNC;
	44	if (flags & JFS_SYNC_FL)
	45	inode->i_flags \|= S_SYNC;
	46	}
	47
3e2221c7 DK	48	void jfs_get_inode_flags(struct jfs_inode_info *jfs_ip)
	49	{
	50	unsigned int flags = jfs_ip->vfs_inode.i_flags;
	51
	52	jfs_ip->mode2 &= ~(JFS_IMMUTABLE_FL \| JFS_APPEND_FL \| JFS_NOATIME_FL \|
	53	JFS_DIRSYNC_FL \| JFS_SYNC_FL);
	54	if (flags & S_IMMUTABLE)
	55	jfs_ip->mode2 \|= JFS_IMMUTABLE_FL;
	56	if (flags & S_APPEND)
	57	jfs_ip->mode2 \|= JFS_APPEND_FL;
	58	if (flags & S_NOATIME)
	59	jfs_ip->mode2 \|= JFS_NOATIME_FL;
	60	if (flags & S_DIRSYNC)
	61	jfs_ip->mode2 \|= JFS_DIRSYNC_FL;
	62	if (flags & S_SYNC)
	63	jfs_ip->mode2 \|= JFS_SYNC_FL;
	64	}
	65
1da177e4 LT	66	/*
	67	* NAME: ialloc()
	68	*
	69	* FUNCTION: Allocate a new inode
	70	*
	71	*/
	72	struct inode ialloc(struct inode parent, umode_t mode)
	73	{
	74	struct super_block *sb = parent->i_sb;
	75	struct inode *inode;
	76	struct jfs_inode_info *jfs_inode;
	77	int rc;
	78
	79	inode = new_inode(sb);
	80	if (!inode) {
	81	jfs_warn("ialloc: new_inode returned NULL!");
1f3403fa DK	82	rc = -ENOMEM;
1f3403fa DK	83	goto fail;
1da177e4 LT	84	}
	85
	86	jfs_inode = JFS_IP(inode);
	87
	88	rc = diAlloc(parent, S_ISDIR(mode), inode);
	89	if (rc) {
	90	jfs_warn("ialloc: diAlloc returned %d!", rc);
087387f9 AM	91	if (rc == -EIO)
087387f9 AM	92	make_bad_inode(inode);
1f3403fa DK	93	goto fail_put;
	94	}
	95
	96	if (insert_inode_locked(inode) < 0) {
	97	rc = -EINVAL;
	98	goto fail_unlock;
1da177e4 LT	99	}
1da177e4 LT	100
8f659adf	101	inode->i_uid = current_fsuid();
1da177e4 LT	102	if (parent->i_mode & S_ISGID) {
	103	inode->i_gid = parent->i_gid;
	104	if (S_ISDIR(mode))
	105	mode \|= S_ISGID;
	106	} else
8f659adf	107	inode->i_gid = current_fsgid();
1da177e4	108
69eb66d7 DK	109	/*
	110	* New inodes need to save sane values on disk when
	111	* uid & gid mount options are used
	112	*/
	113	jfs_inode->saved_uid = inode->i_uid;
	114	jfs_inode->saved_gid = inode->i_gid;
	115
1da177e4 LT	116	/*
	117	* Allocate inode to quota.
	118	*/
871a2931	119	dquot_initialize(inode);
63936dda CH	120	rc = dquot_alloc_inode(inode);
63936dda CH	121	if (rc)
1f3403fa	122	goto fail_drop;
1da177e4 LT	123
1da177e4 LT	124	inode->i_mode = mode;
fa3241d2 HP	125	/* inherit flags from parent */
	126	jfs_inode->mode2 = JFS_IP(parent)->mode2 & JFS_FL_INHERIT;
	127
	128	if (S_ISDIR(mode)) {
	129	jfs_inode->mode2 \|= IDIRECTORY;
	130	jfs_inode->mode2 &= ~JFS_DIRSYNC_FL;
	131	}
4837c672	132	else {
fa3241d2	133	jfs_inode->mode2 \|= INLINEEA \| ISPARSE;
4837c672 DK	134	if (S_ISLNK(mode))
	135	jfs_inode->mode2 &= ~(JFS_IMMUTABLE_FL\|JFS_APPEND_FL);
	136	}
fa3241d2 HP	137	jfs_inode->mode2 \|= mode;
fa3241d2 HP	138
1da177e4 LT	139	inode->i_blocks = 0;
	140	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
	141	jfs_inode->otime = inode->i_ctime.tv_sec;
	142	inode->i_generation = JFS_SBI(sb)->gengen++;
	143
	144	jfs_inode->cflag = 0;
	145
	146	/* Zero remaining fields */
	147	memset(&jfs_inode->acl, 0, sizeof(dxd_t));
	148	memset(&jfs_inode->ea, 0, sizeof(dxd_t));
	149	jfs_inode->next_index = 0;
	150	jfs_inode->acltype = 0;
	151	jfs_inode->btorder = 0;
	152	jfs_inode->btindex = 0;
	153	jfs_inode->bxflag = 0;
	154	jfs_inode->blid = 0;
	155	jfs_inode->atlhead = 0;
	156	jfs_inode->atltail = 0;
	157	jfs_inode->xtlid = 0;
fa3241d2	158	jfs_set_inode_flags(inode);
1da177e4 LT	159
	160	jfs_info("ialloc returns inode = 0x%p\n", inode);
	161
	162	return inode;
1f3403fa DK	163
1f3403fa DK	164	fail_drop:
9f754758	165	dquot_drop(inode);
1f3403fa DK	166	inode->i_flags \|= S_NOQUOTA;
	167	fail_unlock:
	168	inode->i_nlink = 0;
	169	unlock_new_inode(inode);
	170	fail_put:
	171	iput(inode);
	172	fail:
	173	return ERR_PTR(rc);
1da177e4	174	}