[deliverable/linux.git] / include / linux / quotaops.h

/*
 * Definitions for diskquota-operations. When diskquota is configured these
 * macros expand to the right source-code.
 *
 * Author:  Marco van Wieringen <mvw@planets.elm.net>
 */
#ifndef _LINUX_QUOTAOPS_
#define _LINUX_QUOTAOPS_

#include <linux/smp_lock.h>
#include <linux/fs.h>

static inline struct quota_info *sb_dqopt(struct super_block *sb)
{
	return &sb->s_dquot;
}

#if defined(CONFIG_QUOTA)

/*
 * declaration of quota_function calls in kernel.
 */
void sync_dquots(struct super_block *sb, int type);

int dquot_initialize(struct inode *inode, int type);
int dquot_drop(struct inode *inode);
struct dquot *dqget(struct super_block *sb, unsigned int id, int type);
void dqput(struct dquot *dquot);
int dquot_scan_active(struct super_block *sb,
		      int (*fn)(struct dquot *dquot, unsigned long priv),
		      unsigned long priv);
struct dquot *dquot_alloc(struct super_block *sb, int type);
void dquot_destroy(struct dquot *dquot);

int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
int dquot_alloc_inode(const struct inode *inode, qsize_t number);

int dquot_free_space(struct inode *inode, qsize_t number);
int dquot_free_inode(const struct inode *inode, qsize_t number);

int dquot_transfer(struct inode *inode, struct iattr *iattr);
int dquot_commit(struct dquot *dquot);
int dquot_acquire(struct dquot *dquot);
int dquot_release(struct dquot *dquot);
int dquot_commit_info(struct super_block *sb, int type);
int dquot_mark_dquot_dirty(struct dquot *dquot);

int vfs_quota_on(struct super_block *sb, int type, int format_id,
 	char *path, int remount);
int vfs_quota_enable(struct inode *inode, int type, int format_id,
	unsigned int flags);
int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
 	struct path *path);
int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
 	int format_id, int type);
int vfs_quota_off(struct super_block *sb, int type, int remount);
int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
int vfs_quota_sync(struct super_block *sb, int type);
int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);

void vfs_dq_drop(struct inode *inode);
int vfs_dq_transfer(struct inode *inode, struct iattr *iattr);
int vfs_dq_quota_on_remount(struct super_block *sb);

static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
{
	return sb_dqopt(sb)->info + type;
}

/*
 * Functions for checking status of quota
 */

static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
{
	return sb_dqopt(sb)->flags &
				dquot_state_flag(DQUOT_USAGE_ENABLED, type);
}

static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
	return sb_dqopt(sb)->flags &
				dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
}

static inline int sb_has_quota_suspended(struct super_block *sb, int type)
{
	return sb_dqopt(sb)->flags &
				dquot_state_flag(DQUOT_SUSPENDED, type);
}

static inline int sb_any_quota_suspended(struct super_block *sb)
{
	return sb_has_quota_suspended(sb, USRQUOTA) ||
		sb_has_quota_suspended(sb, GRPQUOTA);
}

/* Does kernel know about any quota information for given sb + type? */
static inline int sb_has_quota_loaded(struct super_block *sb, int type)
{
	/* Currently if anything is on, then quota usage is on as well */
	return sb_has_quota_usage_enabled(sb, type);
}

static inline int sb_any_quota_loaded(struct super_block *sb)
{
	return sb_has_quota_loaded(sb, USRQUOTA) ||
		sb_has_quota_loaded(sb, GRPQUOTA);
}

static inline int sb_has_quota_active(struct super_block *sb, int type)
{
	return sb_has_quota_loaded(sb, type) &&
	       !sb_has_quota_suspended(sb, type);
}

static inline int sb_any_quota_active(struct super_block *sb)
{
	return sb_has_quota_active(sb, USRQUOTA) ||
	       sb_has_quota_active(sb, GRPQUOTA);
}

/*
 * Operations supported for diskquotas.
 */
extern struct dquot_operations dquot_operations;
extern struct quotactl_ops vfs_quotactl_ops;

#define sb_dquot_ops (&dquot_operations)
#define sb_quotactl_ops (&vfs_quotactl_ops)

/* It is better to call this function outside of any transaction as it might
 * need a lot of space in journal for dquot structure allocation. */
static inline void vfs_dq_init(struct inode *inode)
{
	BUG_ON(!inode->i_sb);
	if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
		inode->i_sb->dq_op->initialize(inode, -1);
}

/* The following allocation/freeing/transfer functions *must* be called inside
 * a transaction (deadlocks possible otherwise) */
static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
{
	if (sb_any_quota_active(inode->i_sb)) {
		/* Used space is updated in alloc_space() */
		if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
			return 1;
	}
	else
		inode_add_bytes(inode, nr);
	return 0;
}

static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
{
	int ret;
        if (!(ret =  vfs_dq_prealloc_space_nodirty(inode, nr)))
		mark_inode_dirty(inode);
	return ret;
}

static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
{
	if (sb_any_quota_active(inode->i_sb)) {
		/* Used space is updated in alloc_space() */
		if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
			return 1;
	}
	else
		inode_add_bytes(inode, nr);
	return 0;
}

static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
{
	int ret;
	if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
		mark_inode_dirty(inode);
	return ret;
}

static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
{
	if (sb_any_quota_active(inode->i_sb)) {
		/* Used space is updated in alloc_space() */
		if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
			return 1;
	}
	return 0;
}

static inline int vfs_dq_alloc_inode(struct inode *inode)
{
	if (sb_any_quota_active(inode->i_sb)) {
		vfs_dq_init(inode);
		if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
			return 1;
	}
	return 0;
}

static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
{
	if (sb_any_quota_active(inode->i_sb))
		inode->i_sb->dq_op->free_space(inode, nr);
	else
		inode_sub_bytes(inode, nr);
}

static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
{
	vfs_dq_free_space_nodirty(inode, nr);
	mark_inode_dirty(inode);
}

static inline void vfs_dq_free_inode(struct inode *inode)
{
	if (sb_any_quota_active(inode->i_sb))
		inode->i_sb->dq_op->free_inode(inode, 1);
}

/* The following two functions cannot be called inside a transaction */
static inline void vfs_dq_sync(struct super_block *sb)
{
	sync_dquots(sb, -1);
}

static inline int vfs_dq_off(struct super_block *sb, int remount)
{
	int ret = -ENOSYS;

	if (sb->s_qcop && sb->s_qcop->quota_off)
		ret = sb->s_qcop->quota_off(sb, -1, remount);
	return ret;
}

#else

static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_has_quota_suspended(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_any_quota_suspended(struct super_block *sb)
{
	return 0;
}

/* Does kernel know about any quota information for given sb + type? */
static inline int sb_has_quota_loaded(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_any_quota_loaded(struct super_block *sb)
{
	return 0;
}

static inline int sb_has_quota_active(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_any_quota_active(struct super_block *sb)
{
	return 0;
}

/*
 * NO-OP when quota not configured.
 */
#define sb_dquot_ops				(NULL)
#define sb_quotactl_ops				(NULL)

static inline void vfs_dq_init(struct inode *inode)
{
}

static inline void vfs_dq_drop(struct inode *inode)
{
}

static inline int vfs_dq_alloc_inode(struct inode *inode)
{
	return 0;
}

static inline void vfs_dq_free_inode(struct inode *inode)
{
}

static inline void vfs_dq_sync(struct super_block *sb)
{
}

static inline int vfs_dq_off(struct super_block *sb, int remount)
{
	return 0;
}

static inline int vfs_dq_quota_on_remount(struct super_block *sb)
{
	return 0;
}

static inline int vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
{
	return 0;
}

static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
{
	inode_add_bytes(inode, nr);
	return 0;
}

static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
{
	vfs_dq_prealloc_space_nodirty(inode, nr);
	mark_inode_dirty(inode);
	return 0;
}

static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
{
	inode_add_bytes(inode, nr);
	return 0;
}

static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
{
	vfs_dq_alloc_space_nodirty(inode, nr);
	mark_inode_dirty(inode);
	return 0;
}

static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
{
	return 0;
}

static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
{
	inode_sub_bytes(inode, nr);
}

static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
{
	vfs_dq_free_space_nodirty(inode, nr);
	mark_inode_dirty(inode);
}	

#endif /* CONFIG_QUOTA */

static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
{
	return vfs_dq_prealloc_space_nodirty(inode,
			nr << inode->i_sb->s_blocksize_bits);
}

static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
{
	return vfs_dq_prealloc_space(inode,
			nr << inode->i_sb->s_blocksize_bits);
}

static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
{
 	return vfs_dq_alloc_space_nodirty(inode,
			nr << inode->i_sb->s_blocksize_bits);
}

static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
{
	return vfs_dq_alloc_space(inode,
			nr << inode->i_sb->s_blocksize_bits);
}

static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
{
	return vfs_dq_reserve_space(inode,
			nr << inode->i_blkbits);
}

static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
{
	vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
}

static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
{
	vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
}

/*
 * Define uppercase equivalents for compatibility with old function names
 * Can go away when we think all users have been converted (15/04/2008)
 */
#define DQUOT_INIT(inode) vfs_dq_init(inode)
#define DQUOT_DROP(inode) vfs_dq_drop(inode)
#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
				vfs_dq_prealloc_space_nodirty(inode, nr)
#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
				vfs_dq_alloc_space_nodirty(inode, nr)
#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
				vfs_dq_prealloc_block_nodirty(inode, nr)
#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
				vfs_dq_alloc_block_nodirty(inode, nr)
#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
				vfs_dq_free_space_nodirty(inode, nr)
#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
				vfs_dq_free_block_nodirty(inode, nr)
#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)

#endif /* _LINUX_QUOTAOPS_ */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Definitions for diskquota-operations. When diskquota is configured these
	3	* macros expand to the right source-code.
	4	*
	5	* Author: Marco van Wieringen <mvw@planets.elm.net>
1da177e4 LT	6	*/
	7	#ifndef _LINUX_QUOTAOPS_
	8	#define _LINUX_QUOTAOPS_
	9
1da177e4	10	#include <linux/smp_lock.h>
1da177e4 LT	11	#include <linux/fs.h>
1da177e4 LT	12
03b06343 JK	13	static inline struct quota_info sb_dqopt(struct super_block sb)
	14	{
	15	return &sb->s_dquot;
	16	}
74abb989	17
1da177e4 LT	18	#if defined(CONFIG_QUOTA)
	19
	20	/*
	21	* declaration of quota_function calls in kernel.
	22	*/
b85f4b87 JK	23	void sync_dquots(struct super_block *sb, int type);
	24
	25	int dquot_initialize(struct inode *inode, int type);
	26	int dquot_drop(struct inode *inode);
3d9ea253 JK	27	struct dquot dqget(struct super_block sb, unsigned int id, int type);
3d9ea253 JK	28	void dqput(struct dquot *dquot);
12c77527 JK	29	int dquot_scan_active(struct super_block *sb,
	30	int (fn)(struct dquot dquot, unsigned long priv),
	31	unsigned long priv);
7d9056ba JK	32	struct dquot dquot_alloc(struct super_block sb, int type);
7d9056ba JK	33	void dquot_destroy(struct dquot *dquot);
b85f4b87 JK	34
b85f4b87 JK	35	int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
12095460	36	int dquot_alloc_inode(const struct inode *inode, qsize_t number);
b85f4b87 JK	37
b85f4b87 JK	38	int dquot_free_space(struct inode *inode, qsize_t number);
12095460	39	int dquot_free_inode(const struct inode *inode, qsize_t number);
b85f4b87 JK	40
	41	int dquot_transfer(struct inode inode, struct iattr iattr);
	42	int dquot_commit(struct dquot *dquot);
	43	int dquot_acquire(struct dquot *dquot);
	44	int dquot_release(struct dquot *dquot);
	45	int dquot_commit_info(struct super_block *sb, int type);
	46	int dquot_mark_dquot_dirty(struct dquot *dquot);
	47
	48	int vfs_quota_on(struct super_block *sb, int type, int format_id,
	49	char *path, int remount);
f55abc0f JK	50	int vfs_quota_enable(struct inode *inode, int type, int format_id,
f55abc0f JK	51	unsigned int flags);
77e69dac AV	52	int vfs_quota_on_path(struct super_block *sb, int type, int format_id,
77e69dac AV	53	struct path *path);
b85f4b87 JK	54	int vfs_quota_on_mount(struct super_block sb, char qf_name,
	55	int format_id, int type);
	56	int vfs_quota_off(struct super_block *sb, int type, int remount);
f55abc0f	57	int vfs_quota_disable(struct super_block *sb, int type, unsigned int flags);
b85f4b87 JK	58	int vfs_quota_sync(struct super_block *sb, int type);
	59	int vfs_get_dqinfo(struct super_block sb, int type, struct if_dqinfo ii);
	60	int vfs_set_dqinfo(struct super_block sb, int type, struct if_dqinfo ii);
	61	int vfs_get_dqblk(struct super_block sb, int type, qid_t id, struct if_dqblk di);
	62	int vfs_set_dqblk(struct super_block sb, int type, qid_t id, struct if_dqblk di);
	63
	64	void vfs_dq_drop(struct inode *inode);
	65	int vfs_dq_transfer(struct inode inode, struct iattr iattr);
	66	int vfs_dq_quota_on_remount(struct super_block *sb);
1da177e4	67
03b06343 JK	68	static inline struct mem_dqinfo sb_dqinfo(struct super_block sb, int type)
	69	{
	70	return sb_dqopt(sb)->info + type;
	71	}
74abb989 JK	72
	73	/*
	74	* Functions for checking status of quota
	75	*/
	76
f55abc0f	77	static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
03b06343	78	{
f55abc0f JK	79	return sb_dqopt(sb)->flags &
f55abc0f JK	80	dquot_state_flag(DQUOT_USAGE_ENABLED, type);
03b06343	81	}
74abb989	82
f55abc0f	83	static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
03b06343	84	{
f55abc0f JK	85	return sb_dqopt(sb)->flags &
f55abc0f JK	86	dquot_state_flag(DQUOT_LIMITS_ENABLED, type);
03b06343	87	}
74abb989	88
03b06343 JK	89	static inline int sb_has_quota_suspended(struct super_block *sb, int type)
03b06343 JK	90	{
f55abc0f JK	91	return sb_dqopt(sb)->flags &
f55abc0f JK	92	dquot_state_flag(DQUOT_SUSPENDED, type);
03b06343	93	}
74abb989	94
03b06343 JK	95	static inline int sb_any_quota_suspended(struct super_block *sb)
	96	{
	97	return sb_has_quota_suspended(sb, USRQUOTA) \|\|
	98	sb_has_quota_suspended(sb, GRPQUOTA);
	99	}
74abb989	100
f55abc0f JK	101	/* Does kernel know about any quota information for given sb + type? */
	102	static inline int sb_has_quota_loaded(struct super_block *sb, int type)
	103	{
	104	/* Currently if anything is on, then quota usage is on as well */
	105	return sb_has_quota_usage_enabled(sb, type);
	106	}
	107
	108	static inline int sb_any_quota_loaded(struct super_block *sb)
	109	{
	110	return sb_has_quota_loaded(sb, USRQUOTA) \|\|
	111	sb_has_quota_loaded(sb, GRPQUOTA);
	112	}
	113
	114	static inline int sb_has_quota_active(struct super_block *sb, int type)
	115	{
	116	return sb_has_quota_loaded(sb, type) &&
	117	!sb_has_quota_suspended(sb, type);
	118	}
	119
	120	static inline int sb_any_quota_active(struct super_block *sb)
	121	{
	122	return sb_has_quota_active(sb, USRQUOTA) \|\|
	123	sb_has_quota_active(sb, GRPQUOTA);
	124	}
	125
1da177e4 LT	126	/*
	127	* Operations supported for diskquotas.
	128	*/
	129	extern struct dquot_operations dquot_operations;
	130	extern struct quotactl_ops vfs_quotactl_ops;
	131
	132	#define sb_dquot_ops (&dquot_operations)
	133	#define sb_quotactl_ops (&vfs_quotactl_ops)
	134
	135	/* It is better to call this function outside of any transaction as it might
	136	* need a lot of space in journal for dquot structure allocation. */
b85f4b87	137	static inline void vfs_dq_init(struct inode *inode)
1da177e4 LT	138	{
1da177e4 LT	139	BUG_ON(!inode->i_sb);
f55abc0f	140	if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
1da177e4 LT	141	inode->i_sb->dq_op->initialize(inode, -1);
	142	}
	143
1da177e4 LT	144	/* The following allocation/freeing/transfer functions must be called inside
1da177e4 LT	145	* a transaction (deadlocks possible otherwise) */
b85f4b87	146	static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4	147	{
f55abc0f	148	if (sb_any_quota_active(inode->i_sb)) {
1da177e4 LT	149	/* Used space is updated in alloc_space() */
	150	if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
	151	return 1;
	152	}
	153	else
	154	inode_add_bytes(inode, nr);
	155	return 0;
	156	}
	157
b85f4b87	158	static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4 LT	159	{
1da177e4 LT	160	int ret;
b85f4b87	161	if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
1da177e4 LT	162	mark_inode_dirty(inode);
	163	return ret;
	164	}
	165
b85f4b87	166	static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4	167	{
f55abc0f	168	if (sb_any_quota_active(inode->i_sb)) {
1da177e4 LT	169	/* Used space is updated in alloc_space() */
	170	if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
	171	return 1;
	172	}
	173	else
	174	inode_add_bytes(inode, nr);
	175	return 0;
	176	}
	177
b85f4b87	178	static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4 LT	179	{
1da177e4 LT	180	int ret;
b85f4b87	181	if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
1da177e4 LT	182	mark_inode_dirty(inode);
	183	return ret;
	184	}
	185
f18df228 MC	186	static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
	187	{
	188	if (sb_any_quota_active(inode->i_sb)) {
	189	/* Used space is updated in alloc_space() */
	190	if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
	191	return 1;
	192	}
	193	return 0;
	194	}
	195
b85f4b87	196	static inline int vfs_dq_alloc_inode(struct inode *inode)
1da177e4	197	{
f55abc0f	198	if (sb_any_quota_active(inode->i_sb)) {
b85f4b87	199	vfs_dq_init(inode);
1da177e4 LT	200	if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
	201	return 1;
	202	}
	203	return 0;
	204	}
	205
b85f4b87	206	static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4	207	{
f55abc0f	208	if (sb_any_quota_active(inode->i_sb))
1da177e4 LT	209	inode->i_sb->dq_op->free_space(inode, nr);
	210	else
	211	inode_sub_bytes(inode, nr);
	212	}
	213
b85f4b87	214	static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4	215	{
b85f4b87	216	vfs_dq_free_space_nodirty(inode, nr);
1da177e4 LT	217	mark_inode_dirty(inode);
	218	}
	219
b85f4b87	220	static inline void vfs_dq_free_inode(struct inode *inode)
1da177e4	221	{
f55abc0f	222	if (sb_any_quota_active(inode->i_sb))
1da177e4 LT	223	inode->i_sb->dq_op->free_inode(inode, 1);
	224	}
	225
1da177e4	226	/* The following two functions cannot be called inside a transaction */
b85f4b87	227	static inline void vfs_dq_sync(struct super_block *sb)
03f6e92b JK	228	{
	229	sync_dquots(sb, -1);
	230	}
1da177e4	231
b85f4b87	232	static inline int vfs_dq_off(struct super_block *sb, int remount)
1da177e4 LT	233	{
	234	int ret = -ENOSYS;
	235
0ff5af83 JK	236	if (sb->s_qcop && sb->s_qcop->quota_off)
	237	ret = sb->s_qcop->quota_off(sb, -1, remount);
	238	return ret;
	239	}
	240
1da177e4 LT	241	#else
1da177e4 LT	242
f55abc0f	243	static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
03b06343 JK	244	{
	245	return 0;
	246	}
	247
f55abc0f	248	static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
03b06343 JK	249	{
	250	return 0;
	251	}
	252
	253	static inline int sb_has_quota_suspended(struct super_block *sb, int type)
	254	{
	255	return 0;
	256	}
	257
	258	static inline int sb_any_quota_suspended(struct super_block *sb)
	259	{
	260	return 0;
	261	}
74abb989	262
f55abc0f JK	263	/* Does kernel know about any quota information for given sb + type? */
	264	static inline int sb_has_quota_loaded(struct super_block *sb, int type)
	265	{
	266	return 0;
	267	}
	268
	269	static inline int sb_any_quota_loaded(struct super_block *sb)
	270	{
	271	return 0;
	272	}
	273
	274	static inline int sb_has_quota_active(struct super_block *sb, int type)
	275	{
	276	return 0;
	277	}
	278
	279	static inline int sb_any_quota_active(struct super_block *sb)
	280	{
	281	return 0;
	282	}
	283
1da177e4 LT	284	/*
	285	* NO-OP when quota not configured.
	286	*/
	287	#define sb_dquot_ops (NULL)
	288	#define sb_quotactl_ops (NULL)
50f8c370	289
b85f4b87	290	static inline void vfs_dq_init(struct inode *inode)
50f8c370 AM	291	{
	292	}
	293
b85f4b87	294	static inline void vfs_dq_drop(struct inode *inode)
50f8c370 AM	295	{
	296	}
	297
b85f4b87	298	static inline int vfs_dq_alloc_inode(struct inode *inode)
50f8c370 AM	299	{
	300	return 0;
	301	}
	302
b85f4b87	303	static inline void vfs_dq_free_inode(struct inode *inode)
50f8c370 AM	304	{
	305	}
	306
b85f4b87	307	static inline void vfs_dq_sync(struct super_block *sb)
50f8c370 AM	308	{
	309	}
	310
b85f4b87	311	static inline int vfs_dq_off(struct super_block *sb, int remount)
50f8c370 AM	312	{
	313	return 0;
	314	}
	315
b85f4b87	316	static inline int vfs_dq_quota_on_remount(struct super_block *sb)
50f8c370 AM	317	{
	318	return 0;
	319	}
	320
b85f4b87	321	static inline int vfs_dq_transfer(struct inode inode, struct iattr iattr)
50f8c370 AM	322	{
	323	return 0;
	324	}
	325
b85f4b87	326	static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	327	{
	328	inode_add_bytes(inode, nr);
	329	return 0;
	330	}
	331
b85f4b87	332	static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4	333	{
b85f4b87	334	vfs_dq_prealloc_space_nodirty(inode, nr);
1da177e4 LT	335	mark_inode_dirty(inode);
	336	return 0;
	337	}
	338
b85f4b87	339	static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	340	{
	341	inode_add_bytes(inode, nr);
	342	return 0;
	343	}
	344
b85f4b87	345	static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4	346	{
b85f4b87	347	vfs_dq_alloc_space_nodirty(inode, nr);
1da177e4 LT	348	mark_inode_dirty(inode);
	349	return 0;
	350	}
	351
f18df228 MC	352	static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
	353	{
	354	return 0;
	355	}
	356
b85f4b87	357	static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	358	{
	359	inode_sub_bytes(inode, nr);
	360	}
	361
b85f4b87	362	static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4	363	{
b85f4b87	364	vfs_dq_free_space_nodirty(inode, nr);
1da177e4 LT	365	mark_inode_dirty(inode);
	366	}
	367
	368	#endif /* CONFIG_QUOTA */
	369
b85f4b87	370	static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	371	{
b85f4b87	372	return vfs_dq_prealloc_space_nodirty(inode,
03f6e92b JK	373	nr << inode->i_sb->s_blocksize_bits);
	374	}
	375
b85f4b87	376	static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
03f6e92b	377	{
b85f4b87	378	return vfs_dq_prealloc_space(inode,
03f6e92b JK	379	nr << inode->i_sb->s_blocksize_bits);
	380	}
	381
b85f4b87	382	static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	383	{
b85f4b87	384	return vfs_dq_alloc_space_nodirty(inode,
03f6e92b JK	385	nr << inode->i_sb->s_blocksize_bits);
	386	}
	387
b85f4b87	388	static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
03f6e92b	389	{
b85f4b87	390	return vfs_dq_alloc_space(inode,
03f6e92b JK	391	nr << inode->i_sb->s_blocksize_bits);
	392	}
	393
f18df228 MC	394	static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
	395	{
	396	return vfs_dq_reserve_space(inode,
	397	nr << inode->i_blkbits);
	398	}
	399
b85f4b87	400	static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	401	{
b85f4b87	402	vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b JK	403	}
03f6e92b JK	404
b85f4b87	405	static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
03f6e92b	406	{
b85f4b87	407	vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b	408	}
1da177e4	409
b85f4b87 JK	410	/*
	411	* Define uppercase equivalents for compatibility with old function names
	412	* Can go away when we think all users have been converted (15/04/2008)
	413	*/
	414	#define DQUOT_INIT(inode) vfs_dq_init(inode)
	415	#define DQUOT_DROP(inode) vfs_dq_drop(inode)
	416	#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
	417	vfs_dq_prealloc_space_nodirty(inode, nr)
	418	#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
	419	#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
	420	vfs_dq_alloc_space_nodirty(inode, nr)
	421	#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
	422	#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
	423	vfs_dq_prealloc_block_nodirty(inode, nr)
	424	#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
	425	#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
	426	vfs_dq_alloc_block_nodirty(inode, nr)
	427	#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
	428	#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
	429	#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
	430	vfs_dq_free_space_nodirty(inode, nr)
	431	#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
	432	#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
	433	vfs_dq_free_block_nodirty(inode, nr)
	434	#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
	435	#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
	436	#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
	437	#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
	438	#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
	439	#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
	440
1da177e4	441	#endif /* _LINUX_QUOTAOPS_ */