[deliverable/linux.git] / fs / quota / quota_v2.c

/*
 *	vfsv0 quota IO operations on file
 */

#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/mount.h>
#include <linux/dqblk_v2.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/quotaops.h>

#include <asm/byteorder.h>

#include "quota_tree.h"
#include "quotaio_v2.h"

MODULE_AUTHOR("Jan Kara");
MODULE_DESCRIPTION("Quota format v2 support");
MODULE_LICENSE("GPL");

#define __QUOTA_V2_PARANOIA

static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot);
static void v2r0_disk2memdqb(struct dquot *dquot, void *dp);
static int v2r0_is_id(void *dp, struct dquot *dquot);
static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot);
static void v2r1_disk2memdqb(struct dquot *dquot, void *dp);
static int v2r1_is_id(void *dp, struct dquot *dquot);

static struct qtree_fmt_operations v2r0_qtree_ops = {
	.mem2disk_dqblk = v2r0_mem2diskdqb,
	.disk2mem_dqblk = v2r0_disk2memdqb,
	.is_id = v2r0_is_id,
};

static struct qtree_fmt_operations v2r1_qtree_ops = {
	.mem2disk_dqblk = v2r1_mem2diskdqb,
	.disk2mem_dqblk = v2r1_disk2memdqb,
	.is_id = v2r1_is_id,
};

#define QUOTABLOCK_BITS 10
#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)

static inline qsize_t v2_stoqb(qsize_t space)
{
	return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
}

static inline qsize_t v2_qbtos(qsize_t blocks)
{
	return blocks << QUOTABLOCK_BITS;
}

static int v2_read_header(struct super_block *sb, int type,
			  struct v2_disk_dqheader *dqhead)
{
	ssize_t size;

	size = sb->s_op->quota_read(sb, type, (char *)dqhead,
				    sizeof(struct v2_disk_dqheader), 0);
	if (size != sizeof(struct v2_disk_dqheader)) {
		printk(KERN_WARNING "quota_v2: Failed header read:"
		       " expected=%zd got=%zd\n",
			sizeof(struct v2_disk_dqheader), size);
		return 0;
	}
	return 1;
}

/* Check whether given file is really vfsv0 quotafile */
static int v2_check_quota_file(struct super_block *sb, int type)
{
	struct v2_disk_dqheader dqhead;
	static const uint quota_magics[] = V2_INITQMAGICS;
	static const uint quota_versions[] = V2_INITQVERSIONS;
 
	if (!v2_read_header(sb, type, &dqhead))
		return 0;
	if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
	    le32_to_cpu(dqhead.dqh_version) > quota_versions[type])
		return 0;
	return 1;
}

/* Read information header from quota file */
static int v2_read_file_info(struct super_block *sb, int type)
{
	struct v2_disk_dqinfo dinfo;
	struct v2_disk_dqheader dqhead;
	struct mem_dqinfo *info = sb_dqinfo(sb, type);
	struct qtree_mem_dqinfo *qinfo;
	ssize_t size;
	unsigned int version;

	if (!v2_read_header(sb, type, &dqhead))
		return -1;
	version = le32_to_cpu(dqhead.dqh_version);
	if ((info->dqi_fmt_id == QFMT_VFS_V0 && version != 0) ||
	    (info->dqi_fmt_id == QFMT_VFS_V1 && version != 1))
		return -1;

	size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
	       sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
	if (size != sizeof(struct v2_disk_dqinfo)) {
		printk(KERN_WARNING "quota_v2: Can't read info structure on device %s.\n",
			sb->s_id);
		return -1;
	}
	info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
	if (!info->dqi_priv) {
		printk(KERN_WARNING
		       "Not enough memory for quota information structure.\n");
		return -1;
	}
	qinfo = info->dqi_priv;
	if (version == 0) {
		/* limits are stored as unsigned 32-bit data */
		info->dqi_maxblimit = 0xffffffff;
		info->dqi_maxilimit = 0xffffffff;
	} else {
		/* used space is stored as unsigned 64-bit value */
		info->dqi_maxblimit = 0xffffffffffffffffULL;	/* 2^64-1 */
		info->dqi_maxilimit = 0xffffffffffffffffULL;
	}
	info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
	info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
	info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
	qinfo->dqi_sb = sb;
	qinfo->dqi_type = type;
	qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
	qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
	qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
	qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
	qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
	qinfo->dqi_qtree_depth = qtree_depth(qinfo);
	if (version == 0) {
		qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk);
		qinfo->dqi_ops = &v2r0_qtree_ops;
	} else {
		qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk);
		qinfo->dqi_ops = &v2r1_qtree_ops;
	}
	return 0;
}

/* Write information header to quota file */
static int v2_write_file_info(struct super_block *sb, int type)
{
	struct v2_disk_dqinfo dinfo;
	struct mem_dqinfo *info = sb_dqinfo(sb, type);
	struct qtree_mem_dqinfo *qinfo = info->dqi_priv;
	ssize_t size;

	spin_lock(&dq_data_lock);
	info->dqi_flags &= ~DQF_INFO_DIRTY;
	dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
	dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
	dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
	spin_unlock(&dq_data_lock);
	dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks);
	dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk);
	dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry);
	size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
	       sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
	if (size != sizeof(struct v2_disk_dqinfo)) {
		printk(KERN_WARNING "Can't write info structure on device %s.\n",
			sb->s_id);
		return -1;
	}
	return 0;
}

static void v2r0_disk2memdqb(struct dquot *dquot, void *dp)
{
	struct v2r0_disk_dqblk *d = dp, empty;
	struct mem_dqblk *m = &dquot->dq_dqb;

	m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
	m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit);
	m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes);
	m->dqb_itime = le64_to_cpu(d->dqb_itime);
	m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit));
	m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit));
	m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
	m->dqb_btime = le64_to_cpu(d->dqb_btime);
	/* We need to escape back all-zero structure */
	memset(&empty, 0, sizeof(struct v2r0_disk_dqblk));
	empty.dqb_itime = cpu_to_le64(1);
	if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk)))
		m->dqb_itime = 0;
}

static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot)
{
	struct v2r0_disk_dqblk *d = dp;
	struct mem_dqblk *m = &dquot->dq_dqb;
	struct qtree_mem_dqinfo *info =
			sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;

	d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
	d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
	d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
	d->dqb_itime = cpu_to_le64(m->dqb_itime);
	d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit));
	d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
	d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
	d->dqb_btime = cpu_to_le64(m->dqb_btime);
	d->dqb_id = cpu_to_le32(dquot->dq_id);
	if (qtree_entry_unused(info, dp))
		d->dqb_itime = cpu_to_le64(1);
}

static int v2r0_is_id(void *dp, struct dquot *dquot)
{
	struct v2r0_disk_dqblk *d = dp;
	struct qtree_mem_dqinfo *info =
			sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;

	if (qtree_entry_unused(info, dp))
		return 0;
	return le32_to_cpu(d->dqb_id) == dquot->dq_id;
}

static void v2r1_disk2memdqb(struct dquot *dquot, void *dp)
{
	struct v2r1_disk_dqblk *d = dp, empty;
	struct mem_dqblk *m = &dquot->dq_dqb;

	m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
	m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
	m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
	m->dqb_itime = le64_to_cpu(d->dqb_itime);
	m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit));
	m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit));
	m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
	m->dqb_btime = le64_to_cpu(d->dqb_btime);
	/* We need to escape back all-zero structure */
	memset(&empty, 0, sizeof(struct v2r1_disk_dqblk));
	empty.dqb_itime = cpu_to_le64(1);
	if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk)))
		m->dqb_itime = 0;
}

static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot)
{
	struct v2r1_disk_dqblk *d = dp;
	struct mem_dqblk *m = &dquot->dq_dqb;
	struct qtree_mem_dqinfo *info =
			sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;

	d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
	d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
	d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
	d->dqb_itime = cpu_to_le64(m->dqb_itime);
	d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit));
	d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(m->dqb_bsoftlimit));
	d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
	d->dqb_btime = cpu_to_le64(m->dqb_btime);
	d->dqb_id = cpu_to_le32(dquot->dq_id);
	if (qtree_entry_unused(info, dp))
		d->dqb_itime = cpu_to_le64(1);
}

static int v2r1_is_id(void *dp, struct dquot *dquot)
{
	struct v2r1_disk_dqblk *d = dp;
	struct qtree_mem_dqinfo *info =
			sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;

	if (qtree_entry_unused(info, dp))
		return 0;
	return le32_to_cpu(d->dqb_id) == dquot->dq_id;
}

static int v2_read_dquot(struct dquot *dquot)
{
	return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}

static int v2_write_dquot(struct dquot *dquot)
{
	return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}

static int v2_release_dquot(struct dquot *dquot)
{
	return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
}

static int v2_free_file_info(struct super_block *sb, int type)
{
	kfree(sb_dqinfo(sb, type)->dqi_priv);
	return 0;
}

static const struct quota_format_ops v2_format_ops = {
	.check_quota_file	= v2_check_quota_file,
	.read_file_info		= v2_read_file_info,
	.write_file_info	= v2_write_file_info,
	.free_file_info		= v2_free_file_info,
	.read_dqblk		= v2_read_dquot,
	.commit_dqblk		= v2_write_dquot,
	.release_dqblk		= v2_release_dquot,
};

static struct quota_format_type v2r0_quota_format = {
	.qf_fmt_id	= QFMT_VFS_V0,
	.qf_ops		= &v2_format_ops,
	.qf_owner	= THIS_MODULE
};

static struct quota_format_type v2r1_quota_format = {
	.qf_fmt_id	= QFMT_VFS_V1,
	.qf_ops		= &v2_format_ops,
	.qf_owner	= THIS_MODULE
};

static int __init init_v2_quota_format(void)
{
	int ret;

	ret = register_quota_format(&v2r0_quota_format);
	if (ret)
		return ret;
	return register_quota_format(&v2r1_quota_format);
}

static void __exit exit_v2_quota_format(void)
{
	unregister_quota_format(&v2r0_quota_format);
	unregister_quota_format(&v2r1_quota_format);
}

module_init(init_v2_quota_format);
module_exit(exit_v2_quota_format);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* vfsv0 quota IO operations on file
	3	*/
	4
	5	#include <linux/errno.h>
	6	#include <linux/fs.h>
	7	#include <linux/mount.h>
	8	#include <linux/dqblk_v2.h>
1da177e4 LT	9	#include <linux/kernel.h>
	10	#include <linux/init.h>
	11	#include <linux/module.h>
	12	#include <linux/slab.h>
74abb989	13	#include <linux/quotaops.h>
1da177e4 LT	14
	15	#include <asm/byteorder.h>
	16
1ccd14b9	17	#include "quota_tree.h"
cf770c13 JK	18	#include "quotaio_v2.h"
cf770c13 JK	19
1da177e4 LT	20	MODULE_AUTHOR("Jan Kara");
	21	MODULE_DESCRIPTION("Quota format v2 support");
	22	MODULE_LICENSE("GPL");
	23
	24	#define __QUOTA_V2_PARANOIA
	25
498c6015 JK	26	static void v2r0_mem2diskdqb(void dp, struct dquot dquot);
	27	static void v2r0_disk2memdqb(struct dquot dquot, void dp);
	28	static int v2r0_is_id(void dp, struct dquot dquot);
	29	static void v2r1_mem2diskdqb(void dp, struct dquot dquot);
	30	static void v2r1_disk2memdqb(struct dquot dquot, void dp);
	31	static int v2r1_is_id(void dp, struct dquot dquot);
	32
	33	static struct qtree_fmt_operations v2r0_qtree_ops = {
	34	.mem2disk_dqblk = v2r0_mem2diskdqb,
	35	.disk2mem_dqblk = v2r0_disk2memdqb,
	36	.is_id = v2r0_is_id,
	37	};
	38
	39	static struct qtree_fmt_operations v2r1_qtree_ops = {
	40	.mem2disk_dqblk = v2r1_mem2diskdqb,
	41	.disk2mem_dqblk = v2r1_disk2memdqb,
	42	.is_id = v2r1_is_id,
1ccd14b9	43	};
1da177e4	44
12095460 JK	45	#define QUOTABLOCK_BITS 10
	46	#define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
	47
	48	static inline qsize_t v2_stoqb(qsize_t space)
	49	{
	50	return (space + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS;
	51	}
	52
	53	static inline qsize_t v2_qbtos(qsize_t blocks)
	54	{
	55	return blocks << QUOTABLOCK_BITS;
	56	}
	57
498c6015 JK	58	static int v2_read_header(struct super_block *sb, int type,
	59	struct v2_disk_dqheader *dqhead)
	60	{
	61	ssize_t size;
	62
	63	size = sb->s_op->quota_read(sb, type, (char *)dqhead,
	64	sizeof(struct v2_disk_dqheader), 0);
	65	if (size != sizeof(struct v2_disk_dqheader)) {
	66	printk(KERN_WARNING "quota_v2: Failed header read:"
	67	" expected=%zd got=%zd\n",
	68	sizeof(struct v2_disk_dqheader), size);
	69	return 0;
	70	}
	71	return 1;
	72	}
	73
1da177e4 LT	74	/* Check whether given file is really vfsv0 quotafile */
	75	static int v2_check_quota_file(struct super_block *sb, int type)
	76	{
	77	struct v2_disk_dqheader dqhead;
1da177e4 LT	78	static const uint quota_magics[] = V2_INITQMAGICS;
	79	static const uint quota_versions[] = V2_INITQVERSIONS;
	80
498c6015	81	if (!v2_read_header(sb, type, &dqhead))
1da177e4	82	return 0;
1da177e4	83	if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] \|\|
498c6015	84	le32_to_cpu(dqhead.dqh_version) > quota_versions[type])
1da177e4 LT	85	return 0;
	86	return 1;
	87	}
	88
	89	/* Read information header from quota file */
	90	static int v2_read_file_info(struct super_block *sb, int type)
	91	{
	92	struct v2_disk_dqinfo dinfo;
498c6015	93	struct v2_disk_dqheader dqhead;
1ccd14b9	94	struct mem_dqinfo *info = sb_dqinfo(sb, type);
e3d4d56b	95	struct qtree_mem_dqinfo *qinfo;
1da177e4	96	ssize_t size;
498c6015 JK	97	unsigned int version;
	98
	99	if (!v2_read_header(sb, type, &dqhead))
869835df	100	return -1;
498c6015	101	version = le32_to_cpu(dqhead.dqh_version);
869835df JK	102	if ((info->dqi_fmt_id == QFMT_VFS_V0 && version != 0) \|\|
	103	(info->dqi_fmt_id == QFMT_VFS_V1 && version != 1))
	104	return -1;
1da177e4 LT	105
	106	size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
	107	sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
	108	if (size != sizeof(struct v2_disk_dqinfo)) {
498c6015	109	printk(KERN_WARNING "quota_v2: Can't read info structure on device %s.\n",
1da177e4 LT	110	sb->s_id);
	111	return -1;
	112	}
e3d4d56b JK	113	info->dqi_priv = kmalloc(sizeof(struct qtree_mem_dqinfo), GFP_NOFS);
	114	if (!info->dqi_priv) {
	115	printk(KERN_WARNING
	116	"Not enough memory for quota information structure.\n");
	117	return -1;
	118	}
	119	qinfo = info->dqi_priv;
498c6015 JK	120	if (version == 0) {
	121	/* limits are stored as unsigned 32-bit data */
	122	info->dqi_maxblimit = 0xffffffff;
	123	info->dqi_maxilimit = 0xffffffff;
	124	} else {
	125	/* used space is stored as unsigned 64-bit value */
82fdfa92 JK	126	info->dqi_maxblimit = 0xffffffffffffffffULL; /* 2^64-1 */
82fdfa92 JK	127	info->dqi_maxilimit = 0xffffffffffffffffULL;
498c6015	128	}
1da177e4 LT	129	info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
	130	info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
	131	info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
e3d4d56b JK	132	qinfo->dqi_sb = sb;
	133	qinfo->dqi_type = type;
	134	qinfo->dqi_blocks = le32_to_cpu(dinfo.dqi_blocks);
	135	qinfo->dqi_free_blk = le32_to_cpu(dinfo.dqi_free_blk);
	136	qinfo->dqi_free_entry = le32_to_cpu(dinfo.dqi_free_entry);
	137	qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
	138	qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
	139	qinfo->dqi_qtree_depth = qtree_depth(qinfo);
498c6015 JK	140	if (version == 0) {
	141	qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk);
	142	qinfo->dqi_ops = &v2r0_qtree_ops;
	143	} else {
	144	qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk);
	145	qinfo->dqi_ops = &v2r1_qtree_ops;
	146	}
1da177e4 LT	147	return 0;
	148	}
	149
	150	/* Write information header to quota file */
	151	static int v2_write_file_info(struct super_block *sb, int type)
	152	{
	153	struct v2_disk_dqinfo dinfo;
1ccd14b9	154	struct mem_dqinfo *info = sb_dqinfo(sb, type);
e3d4d56b	155	struct qtree_mem_dqinfo *qinfo = info->dqi_priv;
1da177e4 LT	156	ssize_t size;
	157
	158	spin_lock(&dq_data_lock);
	159	info->dqi_flags &= ~DQF_INFO_DIRTY;
	160	dinfo.dqi_bgrace = cpu_to_le32(info->dqi_bgrace);
	161	dinfo.dqi_igrace = cpu_to_le32(info->dqi_igrace);
	162	dinfo.dqi_flags = cpu_to_le32(info->dqi_flags & DQF_MASK);
	163	spin_unlock(&dq_data_lock);
e3d4d56b JK	164	dinfo.dqi_blocks = cpu_to_le32(qinfo->dqi_blocks);
	165	dinfo.dqi_free_blk = cpu_to_le32(qinfo->dqi_free_blk);
	166	dinfo.dqi_free_entry = cpu_to_le32(qinfo->dqi_free_entry);
1da177e4 LT	167	size = sb->s_op->quota_write(sb, type, (char *)&dinfo,
	168	sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
	169	if (size != sizeof(struct v2_disk_dqinfo)) {
	170	printk(KERN_WARNING "Can't write info structure on device %s.\n",
	171	sb->s_id);
	172	return -1;
	173	}
	174	return 0;
	175	}
	176
498c6015	177	static void v2r0_disk2memdqb(struct dquot dquot, void dp)
1da177e4	178	{
498c6015	179	struct v2r0_disk_dqblk *d = dp, empty;
1ccd14b9 JK	180	struct mem_dqblk *m = &dquot->dq_dqb;
1ccd14b9 JK	181
1da177e4 LT	182	m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
	183	m->dqb_isoftlimit = le32_to_cpu(d->dqb_isoftlimit);
	184	m->dqb_curinodes = le32_to_cpu(d->dqb_curinodes);
	185	m->dqb_itime = le64_to_cpu(d->dqb_itime);
12095460 JK	186	m->dqb_bhardlimit = v2_qbtos(le32_to_cpu(d->dqb_bhardlimit));
12095460 JK	187	m->dqb_bsoftlimit = v2_qbtos(le32_to_cpu(d->dqb_bsoftlimit));
1da177e4 LT	188	m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
1da177e4 LT	189	m->dqb_btime = le64_to_cpu(d->dqb_btime);
1ccd14b9	190	/* We need to escape back all-zero structure */
498c6015	191	memset(&empty, 0, sizeof(struct v2r0_disk_dqblk));
1ccd14b9	192	empty.dqb_itime = cpu_to_le64(1);
498c6015	193	if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk)))
1ccd14b9	194	m->dqb_itime = 0;
1da177e4 LT	195	}
1da177e4 LT	196
498c6015	197	static void v2r0_mem2diskdqb(void dp, struct dquot dquot)
1da177e4	198	{
498c6015	199	struct v2r0_disk_dqblk *d = dp;
1ccd14b9 JK	200	struct mem_dqblk *m = &dquot->dq_dqb;
1ccd14b9 JK	201	struct qtree_mem_dqinfo *info =
e3d4d56b	202	sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
1ccd14b9	203
1da177e4 LT	204	d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
	205	d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
	206	d->dqb_curinodes = cpu_to_le32(m->dqb_curinodes);
	207	d->dqb_itime = cpu_to_le64(m->dqb_itime);
cf770c13 JK	208	d->dqb_bhardlimit = cpu_to_le32(v2_stoqb(m->dqb_bhardlimit));
cf770c13 JK	209	d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
1da177e4 LT	210	d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
1da177e4 LT	211	d->dqb_btime = cpu_to_le64(m->dqb_btime);
1ccd14b9 JK	212	d->dqb_id = cpu_to_le32(dquot->dq_id);
	213	if (qtree_entry_unused(info, dp))
	214	d->dqb_itime = cpu_to_le64(1);
1da177e4 LT	215	}
1da177e4 LT	216
498c6015 JK	217	static int v2r0_is_id(void dp, struct dquot dquot)
	218	{
	219	struct v2r0_disk_dqblk *d = dp;
	220	struct qtree_mem_dqinfo *info =
	221	sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
	222
	223	if (qtree_entry_unused(info, dp))
	224	return 0;
	225	return le32_to_cpu(d->dqb_id) == dquot->dq_id;
	226	}
	227
	228	static void v2r1_disk2memdqb(struct dquot dquot, void dp)
	229	{
	230	struct v2r1_disk_dqblk *d = dp, empty;
	231	struct mem_dqblk *m = &dquot->dq_dqb;
	232
	233	m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
	234	m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
	235	m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
	236	m->dqb_itime = le64_to_cpu(d->dqb_itime);
	237	m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit));
	238	m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit));
	239	m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
	240	m->dqb_btime = le64_to_cpu(d->dqb_btime);
	241	/* We need to escape back all-zero structure */
	242	memset(&empty, 0, sizeof(struct v2r1_disk_dqblk));
	243	empty.dqb_itime = cpu_to_le64(1);
	244	if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk)))
	245	m->dqb_itime = 0;
	246	}
	247
	248	static void v2r1_mem2diskdqb(void dp, struct dquot dquot)
	249	{
	250	struct v2r1_disk_dqblk *d = dp;
	251	struct mem_dqblk *m = &dquot->dq_dqb;
	252	struct qtree_mem_dqinfo *info =
	253	sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
	254
	255	d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
	256	d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
	257	d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
	258	d->dqb_itime = cpu_to_le64(m->dqb_itime);
	259	d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit));
	260	d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(m->dqb_bsoftlimit));
	261	d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
	262	d->dqb_btime = cpu_to_le64(m->dqb_btime);
	263	d->dqb_id = cpu_to_le32(dquot->dq_id);
	264	if (qtree_entry_unused(info, dp))
	265	d->dqb_itime = cpu_to_le64(1);
	266	}
	267
	268	static int v2r1_is_id(void dp, struct dquot dquot)
1da177e4	269	{
498c6015	270	struct v2r1_disk_dqblk *d = dp;
1ccd14b9	271	struct qtree_mem_dqinfo *info =
e3d4d56b	272	sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
1da177e4	273
1ccd14b9	274	if (qtree_entry_unused(info, dp))
1da177e4	275	return 0;
1ccd14b9	276	return le32_to_cpu(d->dqb_id) == dquot->dq_id;
1da177e4 LT	277	}
1da177e4 LT	278
1ccd14b9	279	static int v2_read_dquot(struct dquot *dquot)
1da177e4	280	{
e3d4d56b	281	return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
1da177e4 LT	282	}
1da177e4 LT	283
1da177e4 LT	284	static int v2_write_dquot(struct dquot *dquot)
1da177e4 LT	285	{
e3d4d56b	286	return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
1da177e4 LT	287	}
1da177e4 LT	288
1da177e4 LT	289	static int v2_release_dquot(struct dquot *dquot)
1da177e4 LT	290	{
e3d4d56b JK	291	return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
	292	}
	293
	294	static int v2_free_file_info(struct super_block *sb, int type)
	295	{
	296	kfree(sb_dqinfo(sb, type)->dqi_priv);
	297	return 0;
1da177e4 LT	298	}
1da177e4 LT	299
1472da5f	300	static const struct quota_format_ops v2_format_ops = {
1da177e4 LT	301	.check_quota_file = v2_check_quota_file,
	302	.read_file_info = v2_read_file_info,
	303	.write_file_info = v2_write_file_info,
e3d4d56b	304	.free_file_info = v2_free_file_info,
1da177e4 LT	305	.read_dqblk = v2_read_dquot,
	306	.commit_dqblk = v2_write_dquot,
	307	.release_dqblk = v2_release_dquot,
	308	};
	309
498c6015	310	static struct quota_format_type v2r0_quota_format = {
1da177e4 LT	311	.qf_fmt_id = QFMT_VFS_V0,
	312	.qf_ops = &v2_format_ops,
	313	.qf_owner = THIS_MODULE
	314	};
	315
498c6015 JK	316	static struct quota_format_type v2r1_quota_format = {
	317	.qf_fmt_id = QFMT_VFS_V1,
	318	.qf_ops = &v2_format_ops,
	319	.qf_owner = THIS_MODULE
	320	};
	321
1da177e4 LT	322	static int __init init_v2_quota_format(void)
1da177e4 LT	323	{
498c6015 JK	324	int ret;
	325
	326	ret = register_quota_format(&v2r0_quota_format);
	327	if (ret)
	328	return ret;
	329	return register_quota_format(&v2r1_quota_format);
1da177e4 LT	330	}
	331
	332	static void __exit exit_v2_quota_format(void)
	333	{
498c6015 JK	334	unregister_quota_format(&v2r0_quota_format);
498c6015 JK	335	unregister_quota_format(&v2r1_quota_format);
1da177e4 LT	336	}
	337
	338	module_init(init_v2_quota_format);
	339	module_exit(exit_v2_quota_format);