[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_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 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 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
b85f4b87	186	static inline int vfs_dq_alloc_inode(struct inode *inode)
1da177e4	187	{
f55abc0f	188	if (sb_any_quota_active(inode->i_sb)) {
b85f4b87	189	vfs_dq_init(inode);
1da177e4 LT	190	if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
	191	return 1;
	192	}
	193	return 0;
	194	}
	195
b85f4b87	196	static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4	197	{
f55abc0f	198	if (sb_any_quota_active(inode->i_sb))
1da177e4 LT	199	inode->i_sb->dq_op->free_space(inode, nr);
	200	else
	201	inode_sub_bytes(inode, nr);
	202	}
	203
b85f4b87	204	static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4	205	{
b85f4b87	206	vfs_dq_free_space_nodirty(inode, nr);
1da177e4 LT	207	mark_inode_dirty(inode);
	208	}
	209
b85f4b87	210	static inline void vfs_dq_free_inode(struct inode *inode)
1da177e4	211	{
f55abc0f	212	if (sb_any_quota_active(inode->i_sb))
1da177e4 LT	213	inode->i_sb->dq_op->free_inode(inode, 1);
	214	}
	215
1da177e4	216	/* The following two functions cannot be called inside a transaction */
b85f4b87	217	static inline void vfs_dq_sync(struct super_block *sb)
03f6e92b JK	218	{
	219	sync_dquots(sb, -1);
	220	}
1da177e4	221
b85f4b87	222	static inline int vfs_dq_off(struct super_block *sb, int remount)
1da177e4 LT	223	{
	224	int ret = -ENOSYS;
	225
0ff5af83 JK	226	if (sb->s_qcop && sb->s_qcop->quota_off)
	227	ret = sb->s_qcop->quota_off(sb, -1, remount);
	228	return ret;
	229	}
	230
1da177e4 LT	231	#else
1da177e4 LT	232
f55abc0f	233	static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
03b06343 JK	234	{
	235	return 0;
	236	}
	237
f55abc0f	238	static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
03b06343 JK	239	{
	240	return 0;
	241	}
	242
	243	static inline int sb_has_quota_suspended(struct super_block *sb, int type)
	244	{
	245	return 0;
	246	}
	247
	248	static inline int sb_any_quota_suspended(struct super_block *sb)
	249	{
	250	return 0;
	251	}
74abb989	252
f55abc0f JK	253	/* Does kernel know about any quota information for given sb + type? */
	254	static inline int sb_has_quota_loaded(struct super_block *sb, int type)
	255	{
	256	return 0;
	257	}
	258
	259	static inline int sb_any_quota_loaded(struct super_block *sb)
	260	{
	261	return 0;
	262	}
	263
	264	static inline int sb_has_quota_active(struct super_block *sb, int type)
	265	{
	266	return 0;
	267	}
	268
	269	static inline int sb_any_quota_active(struct super_block *sb)
	270	{
	271	return 0;
	272	}
	273
1da177e4 LT	274	/*
	275	* NO-OP when quota not configured.
	276	*/
	277	#define sb_dquot_ops (NULL)
	278	#define sb_quotactl_ops (NULL)
50f8c370	279
b85f4b87	280	static inline void vfs_dq_init(struct inode *inode)
50f8c370 AM	281	{
	282	}
	283
b85f4b87	284	static inline void vfs_dq_drop(struct inode *inode)
50f8c370 AM	285	{
	286	}
	287
b85f4b87	288	static inline int vfs_dq_alloc_inode(struct inode *inode)
50f8c370 AM	289	{
	290	return 0;
	291	}
	292
b85f4b87	293	static inline void vfs_dq_free_inode(struct inode *inode)
50f8c370 AM	294	{
	295	}
	296
b85f4b87	297	static inline void vfs_dq_sync(struct super_block *sb)
50f8c370 AM	298	{
	299	}
	300
b85f4b87	301	static inline int vfs_dq_off(struct super_block *sb, int remount)
50f8c370 AM	302	{
	303	return 0;
	304	}
	305
b85f4b87	306	static inline int vfs_dq_quota_on_remount(struct super_block *sb)
50f8c370 AM	307	{
	308	return 0;
	309	}
	310
b85f4b87	311	static inline int vfs_dq_transfer(struct inode inode, struct iattr iattr)
50f8c370 AM	312	{
	313	return 0;
	314	}
	315
b85f4b87	316	static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	317	{
	318	inode_add_bytes(inode, nr);
	319	return 0;
	320	}
	321
b85f4b87	322	static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
1da177e4	323	{
b85f4b87	324	vfs_dq_prealloc_space_nodirty(inode, nr);
1da177e4 LT	325	mark_inode_dirty(inode);
	326	return 0;
	327	}
	328
b85f4b87	329	static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	330	{
	331	inode_add_bytes(inode, nr);
	332	return 0;
	333	}
	334
b85f4b87	335	static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
1da177e4	336	{
b85f4b87	337	vfs_dq_alloc_space_nodirty(inode, nr);
1da177e4 LT	338	mark_inode_dirty(inode);
	339	return 0;
	340	}
	341
b85f4b87	342	static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
1da177e4 LT	343	{
	344	inode_sub_bytes(inode, nr);
	345	}
	346
b85f4b87	347	static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
1da177e4	348	{
b85f4b87	349	vfs_dq_free_space_nodirty(inode, nr);
1da177e4 LT	350	mark_inode_dirty(inode);
	351	}
	352
	353	#endif /* CONFIG_QUOTA */
	354
b85f4b87	355	static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	356	{
b85f4b87	357	return vfs_dq_prealloc_space_nodirty(inode,
03f6e92b JK	358	nr << inode->i_sb->s_blocksize_bits);
	359	}
	360
b85f4b87	361	static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
03f6e92b	362	{
b85f4b87	363	return vfs_dq_prealloc_space(inode,
03f6e92b JK	364	nr << inode->i_sb->s_blocksize_bits);
	365	}
	366
b85f4b87	367	static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	368	{
b85f4b87	369	return vfs_dq_alloc_space_nodirty(inode,
03f6e92b JK	370	nr << inode->i_sb->s_blocksize_bits);
	371	}
	372
b85f4b87	373	static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
03f6e92b	374	{
b85f4b87	375	return vfs_dq_alloc_space(inode,
03f6e92b JK	376	nr << inode->i_sb->s_blocksize_bits);
	377	}
	378
b85f4b87	379	static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
03f6e92b	380	{
b85f4b87	381	vfs_dq_free_space_nodirty(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b JK	382	}
03f6e92b JK	383
b85f4b87	384	static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
03f6e92b	385	{
b85f4b87	386	vfs_dq_free_space(inode, nr << inode->i_sb->s_blocksize_bits);
03f6e92b	387	}
1da177e4	388
b85f4b87 JK	389	/*
	390	* Define uppercase equivalents for compatibility with old function names
	391	* Can go away when we think all users have been converted (15/04/2008)
	392	*/
	393	#define DQUOT_INIT(inode) vfs_dq_init(inode)
	394	#define DQUOT_DROP(inode) vfs_dq_drop(inode)
	395	#define DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr) \
	396	vfs_dq_prealloc_space_nodirty(inode, nr)
	397	#define DQUOT_PREALLOC_SPACE(inode, nr) vfs_dq_prealloc_space(inode, nr)
	398	#define DQUOT_ALLOC_SPACE_NODIRTY(inode, nr) \
	399	vfs_dq_alloc_space_nodirty(inode, nr)
	400	#define DQUOT_ALLOC_SPACE(inode, nr) vfs_dq_alloc_space(inode, nr)
	401	#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) \
	402	vfs_dq_prealloc_block_nodirty(inode, nr)
	403	#define DQUOT_PREALLOC_BLOCK(inode, nr) vfs_dq_prealloc_block(inode, nr)
	404	#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) \
	405	vfs_dq_alloc_block_nodirty(inode, nr)
	406	#define DQUOT_ALLOC_BLOCK(inode, nr) vfs_dq_alloc_block(inode, nr)
	407	#define DQUOT_ALLOC_INODE(inode) vfs_dq_alloc_inode(inode)
	408	#define DQUOT_FREE_SPACE_NODIRTY(inode, nr) \
	409	vfs_dq_free_space_nodirty(inode, nr)
	410	#define DQUOT_FREE_SPACE(inode, nr) vfs_dq_free_space(inode, nr)
	411	#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) \
	412	vfs_dq_free_block_nodirty(inode, nr)
	413	#define DQUOT_FREE_BLOCK(inode, nr) vfs_dq_free_block(inode, nr)
	414	#define DQUOT_FREE_INODE(inode) vfs_dq_free_inode(inode)
	415	#define DQUOT_TRANSFER(inode, iattr) vfs_dq_transfer(inode, iattr)
	416	#define DQUOT_SYNC(sb) vfs_dq_sync(sb)
	417	#define DQUOT_OFF(sb, remount) vfs_dq_off(sb, remount)
	418	#define DQUOT_ON_REMOUNT(sb) vfs_dq_quota_on_remount(sb)
	419
1da177e4	420	#endif /* _LINUX_QUOTAOPS_ */