WebSVN - shark - Blame - Rev 1618 - /shark/branches/xen/drivers/linuxc26/include/linux/quotaops.h

Rev	Author	Line No.	Line
422	giacomo	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>
		6	*
		7	* Version: $Id: quotaops.h,v 1.1 2004-01-28 15:26:25 giacomo Exp $
		8	*
		9	*/
		10	#ifndef _LINUX_QUOTAOPS_
		11	#define _LINUX_QUOTAOPS_
		12
		13	#include <linux/config.h>
		14	#include <linux/smp_lock.h>
		15
		16	#include <linux/fs.h>
		17
		18	#if defined(CONFIG_QUOTA)
		19
		20	/*
		21	* declaration of quota_function calls in kernel.
		22	*/
		23	extern void sync_dquots(struct super_block *sb, int type);
		24
		25	extern void dquot_initialize(struct inode *inode, int type);
		26	extern void dquot_drop(struct inode *inode);
		27
		28	extern int dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
		29	extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
		30
		31	extern void dquot_free_space(struct inode *inode, qsize_t number);
		32	extern void dquot_free_inode(const struct inode *inode, unsigned long number);
		33
		34	extern int dquot_transfer(struct inode inode, struct iattr iattr);
		35
		36	/*
		37	* Operations supported for diskquotas.
		38	*/
		39	extern struct dquot_operations dquot_operations;
		40	extern struct quotactl_ops vfs_quotactl_ops;
		41
		42	#define sb_dquot_ops (&dquot_operations)
		43	#define sb_quotactl_ops (&vfs_quotactl_ops)
		44
		45	static __inline__ void DQUOT_INIT(struct inode *inode)
		46	{
		47	if (!inode->i_sb)
		48	BUG();
		49	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
		50	inode->i_sb->dq_op->initialize(inode, -1);
		51	}
		52
		53	static __inline__ void DQUOT_DROP(struct inode *inode)
		54	{
		55	if (IS_QUOTAINIT(inode)) {
		56	if (!inode->i_sb)
		57	BUG();
		58	inode->i_sb->dq_op->drop(inode); /* Ops must be set when there's any quota... */
		59	}
		60	}
		61
		62	static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		63	{
		64	if (sb_any_quota_enabled(inode->i_sb)) {
		65	/* Used space is updated in alloc_space() */
		66	if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
		67	return 1;
		68	}
		69	else {
		70	spin_lock(&dq_data_lock);
		71	inode_add_bytes(inode, nr);
		72	spin_unlock(&dq_data_lock);
		73	}
		74	return 0;
		75	}
		76
		77	static __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
		78	{
		79	int ret;
		80	if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
		81	mark_inode_dirty(inode);
		82	return ret;
		83	}
		84
		85	static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		86	{
		87	if (sb_any_quota_enabled(inode->i_sb)) {
		88	/* Used space is updated in alloc_space() */
		89	if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
		90	return 1;
		91	}
		92	else {
		93	spin_lock(&dq_data_lock);
		94	inode_add_bytes(inode, nr);
		95	spin_unlock(&dq_data_lock);
		96	}
		97	return 0;
		98	}
		99
		100	static __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
		101	{
		102	int ret;
		103	if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
		104	mark_inode_dirty(inode);
		105	return ret;
		106	}
		107
		108	static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
		109	{
		110	if (sb_any_quota_enabled(inode->i_sb)) {
		111	DQUOT_INIT(inode);
		112	if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
		113	return 1;
		114	}
		115	return 0;
		116	}
		117
		118	static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		119	{
		120	if (sb_any_quota_enabled(inode->i_sb))
		121	inode->i_sb->dq_op->free_space(inode, nr);
		122	else {
		123	spin_lock(&dq_data_lock);
		124	inode_sub_bytes(inode, nr);
		125	spin_unlock(&dq_data_lock);
		126	}
		127	}
		128
		129	static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
		130	{
		131	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
		132	mark_inode_dirty(inode);
		133	}
		134
		135	static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
		136	{
		137	if (sb_any_quota_enabled(inode->i_sb))
		138	inode->i_sb->dq_op->free_inode(inode, 1);
		139	}
		140
		141	static __inline__ int DQUOT_TRANSFER(struct inode inode, struct iattr iattr)
		142	{
		143	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
		144	DQUOT_INIT(inode);
		145	if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
		146	return 1;
		147	}
		148	return 0;
		149	}
		150
		151	#define DQUOT_SYNC(sb) sync_dquots(sb, -1)
		152
		153	static __inline__ int DQUOT_OFF(struct super_block *sb)
		154	{
		155	int ret = -ENOSYS;
		156
		157	if (sb->s_qcop && sb->s_qcop->quota_off)
		158	ret = sb->s_qcop->quota_off(sb, -1);
		159	return ret;
		160	}
		161
		162	#else
		163
		164	/*
		165	* NO-OP when quota not configured.
		166	*/
		167	#define sb_dquot_ops (NULL)
		168	#define sb_quotactl_ops (NULL)
		169	#define sync_dquots_dev(dev,type) (NULL)
		170	#define DQUOT_INIT(inode) do { } while(0)
		171	#define DQUOT_DROP(inode) do { } while(0)
		172	#define DQUOT_ALLOC_INODE(inode) (0)
		173	#define DQUOT_FREE_INODE(inode) do { } while(0)
		174	#define DQUOT_SYNC(sb) do { } while(0)
		175	#define DQUOT_OFF(sb) do { } while(0)
		176	#define DQUOT_TRANSFER(inode, iattr) (0)
		177	extern __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		178	{
		179	inode_add_bytes(inode, nr);
		180	return 0;
		181	}
		182
		183	extern __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
		184	{
		185	DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
		186	mark_inode_dirty(inode);
		187	return 0;
		188	}
		189
		190	extern __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		191	{
		192	inode_add_bytes(inode, nr);
		193	return 0;
		194	}
		195
		196	extern __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
		197	{
		198	DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
		199	mark_inode_dirty(inode);
		200	return 0;
		201	}
		202
		203	extern __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
		204	{
		205	inode_sub_bytes(inode, nr);
		206	}
		207
		208	extern __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
		209	{
		210	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
		211	mark_inode_dirty(inode);
		212	}
		213
		214	#endif /* CONFIG_QUOTA */
		215
		216	#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		217	#define DQUOT_PREALLOC_BLOCK(inode, nr) DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		218	#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		219	#define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		220	#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		221	#define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
		222
		223	#endif /* _LINUX_QUOTAOPS_ */

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