include/linux/quotaops.h - linux/kernel/git/mellanox/linux - Git at Google

 /*
  * Definitions for diskquota-operations. When diskquota is configured these
  * macros expand to the right source-code.
  *
  * Author:  Marco van Wieringen <mvw@planets.elm.net>
  *
  * Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
  *
  */
 #ifndef _LINUX_QUOTAOPS_
 #define _LINUX_QUOTAOPS_

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

 #include <linux/fs.h>

 #if defined(CONFIG_QUOTA)

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

 extern int dquot_initialize(struct inode *inode, int type);
 extern int dquot_drop(struct inode *inode);

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

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

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

 extern int vfs_quota_on(struct super_block *sb, int type, int format_id, char *path);
 extern int vfs_quota_on_mount(struct super_block *sb, char *qf_name,
 		int format_id, int type);
 extern int vfs_quota_off(struct super_block *sb, int type);
 #define vfs_quota_off_mount(sb, type) vfs_quota_off(sb, type)
 extern int vfs_quota_sync(struct super_block *sb, int type);
 extern int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 extern int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 extern int vfs_get_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
 extern int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);

 /*
  * 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 DQUOT_INIT(struct inode *inode)
 {
 	BUG_ON(!inode->i_sb);
 	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
 		inode->i_sb->dq_op->initialize(inode, -1);
 }

 /* The same as with DQUOT_INIT */
 static __inline__ void DQUOT_DROP(struct inode *inode)
 {
 	/* Here we can get arbitrary inode from clear_inode() so we have
 	 * to be careful. OTOH we don't need locking as quota operations
 	 * are allowed to change only at mount time */
 	if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
 	    && inode->i_sb->dq_op->drop) {
 		int cnt;
 		/* Test before calling to rule out calls from proc and such
                  * where we are not allowed to block. Note that this is
 		 * actually reliable test even without the lock - the caller
 		 * must assure that nobody can come after the DQUOT_DROP and
 		 * add quota pointers back anyway */
 		for (cnt = 0; cnt < MAXQUOTAS; cnt++)
 			if (inode->i_dquot[cnt] != NODQUOT)
 				break;
 		if (cnt < MAXQUOTAS)
 			inode->i_sb->dq_op->drop(inode);
 	}
 }

 /* The following allocation/freeing/transfer functions *must* be called inside
  * a transaction (deadlocks possible otherwise) */
 static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	if (sb_any_quota_enabled(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 DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
 	int ret;
         if (!(ret =  DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
 		mark_inode_dirty(inode);
 	return ret;
 }

 static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	if (sb_any_quota_enabled(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 DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
 	int ret;
 	if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
 		mark_inode_dirty(inode);
 	return ret;
 }

 static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
 {
 	if (sb_any_quota_enabled(inode->i_sb)) {
 		DQUOT_INIT(inode);
 		if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
 			return 1;
 	}
 	return 0;
 }

 static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	if (sb_any_quota_enabled(inode->i_sb))
 		inode->i_sb->dq_op->free_space(inode, nr);
 	else
 		inode_sub_bytes(inode, nr);
 }

 static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
 {
 	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 }

 static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
 {
 	if (sb_any_quota_enabled(inode->i_sb))
 		inode->i_sb->dq_op->free_inode(inode, 1);
 }

 static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
 {
 	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
 		DQUOT_INIT(inode);
 		if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
 			return 1;
 	}
 	return 0;
 }

 /* The following two functions cannot be called inside a transaction */
 #define DQUOT_SYNC(sb)	sync_dquots(sb, -1)

 static __inline__ int DQUOT_OFF(struct super_block *sb)
 {
 	int ret = -ENOSYS;

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

 #else

 /*
  * NO-OP when quota not configured.
  */
 #define sb_dquot_ops				(NULL)
 #define sb_quotactl_ops				(NULL)
 #define sync_dquots_dev(dev,type)		(NULL)
 #define DQUOT_INIT(inode)			do { } while(0)
 #define DQUOT_DROP(inode)			do { } while(0)
 #define DQUOT_ALLOC_INODE(inode)		(0)
 #define DQUOT_FREE_INODE(inode)			do { } while(0)
 #define DQUOT_SYNC(sb)				do { } while(0)
 #define DQUOT_OFF(sb)				do { } while(0)
 #define DQUOT_TRANSFER(inode, iattr)		(0)
 static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	inode_add_bytes(inode, nr);
 	return 0;
 }

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

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

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

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

 static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
 {
 	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 }

 #endif /* CONFIG_QUOTA */

 #define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr)	DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
 #define DQUOT_PREALLOC_BLOCK(inode, nr)	DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
 #define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
 #define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
 #define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
 #define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)

 #endif /* _LINUX_QUOTAOPS_ */
	/*
	* Definitions for diskquota-operations. When diskquota is configured these
	* macros expand to the right source-code.
	*
	* Author: Marco van Wieringen <mvw@planets.elm.net>
	*
	* Version: $Id: quotaops.h,v 1.2 1998/01/15 16:22:26 ecd Exp $
	*
	*/
	#ifndef _LINUX_QUOTAOPS_
	#define _LINUX_QUOTAOPS_

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

	#include <linux/fs.h>

	#if defined(CONFIG_QUOTA)

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

	extern int dquot_initialize(struct inode *inode, int type);
	extern int dquot_drop(struct inode *inode);

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

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

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

	extern int vfs_quota_on(struct super_block sb, int type, int format_id, char path);
	extern int vfs_quota_on_mount(struct super_block sb, char qf_name,
	int format_id, int type);
	extern int vfs_quota_off(struct super_block *sb, int type);
	#define vfs_quota_off_mount(sb, type) vfs_quota_off(sb, type)
	extern int vfs_quota_sync(struct super_block *sb, int type);
	extern int vfs_get_dqinfo(struct super_block sb, int type, struct if_dqinfo ii);
	extern int vfs_set_dqinfo(struct super_block sb, int type, struct if_dqinfo ii);
	extern int vfs_get_dqblk(struct super_block sb, int type, qid_t id, struct if_dqblk di);
	extern int vfs_set_dqblk(struct super_block sb, int type, qid_t id, struct if_dqblk di);

	/*
	* 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 DQUOT_INIT(struct inode *inode)
	{
	BUG_ON(!inode->i_sb);
	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
	inode->i_sb->dq_op->initialize(inode, -1);
	}

	/* The same as with DQUOT_INIT */
	static __inline__ void DQUOT_DROP(struct inode *inode)
	{
	/* Here we can get arbitrary inode from clear_inode() so we have
	* to be careful. OTOH we don't need locking as quota operations
	* are allowed to change only at mount time */
	if (!IS_NOQUOTA(inode) && inode->i_sb && inode->i_sb->dq_op
	&& inode->i_sb->dq_op->drop) {
	int cnt;
	/* Test before calling to rule out calls from proc and such
	* where we are not allowed to block. Note that this is
	* actually reliable test even without the lock - the caller
	* must assure that nobody can come after the DQUOT_DROP and
	* add quota pointers back anyway */
	for (cnt = 0; cnt < MAXQUOTAS; cnt++)
	if (inode->i_dquot[cnt] != NODQUOT)
	break;
	if (cnt < MAXQUOTAS)
	inode->i_sb->dq_op->drop(inode);
	}
	}

	/* The following allocation/freeing/transfer functions must be called inside
	* a transaction (deadlocks possible otherwise) */
	static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
	{
	if (sb_any_quota_enabled(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 DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
	{
	int ret;
	if (!(ret = DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
	mark_inode_dirty(inode);
	return ret;
	}

	static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
	{
	if (sb_any_quota_enabled(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 DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
	{
	int ret;
	if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
	mark_inode_dirty(inode);
	return ret;
	}

	static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
	{
	if (sb_any_quota_enabled(inode->i_sb)) {
	DQUOT_INIT(inode);
	if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
	return 1;
	}
	return 0;
	}

	static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
	{
	if (sb_any_quota_enabled(inode->i_sb))
	inode->i_sb->dq_op->free_space(inode, nr);
	else
	inode_sub_bytes(inode, nr);
	}

	static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
	{
	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
	mark_inode_dirty(inode);
	}

	static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
	{
	if (sb_any_quota_enabled(inode->i_sb))
	inode->i_sb->dq_op->free_inode(inode, 1);
	}

	static __inline__ int DQUOT_TRANSFER(struct inode inode, struct iattr iattr)
	{
	if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
	DQUOT_INIT(inode);
	if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
	return 1;
	}
	return 0;
	}

	/* The following two functions cannot be called inside a transaction */
	#define DQUOT_SYNC(sb) sync_dquots(sb, -1)

	static __inline__ int DQUOT_OFF(struct super_block *sb)
	{
	int ret = -ENOSYS;

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

	#else

	/*
	* NO-OP when quota not configured.
	*/
	#define sb_dquot_ops (NULL)
	#define sb_quotactl_ops (NULL)
	#define sync_dquots_dev(dev,type) (NULL)
	#define DQUOT_INIT(inode) do { } while(0)
	#define DQUOT_DROP(inode) do { } while(0)
	#define DQUOT_ALLOC_INODE(inode) (0)
	#define DQUOT_FREE_INODE(inode) do { } while(0)
	#define DQUOT_SYNC(sb) do { } while(0)
	#define DQUOT_OFF(sb) do { } while(0)
	#define DQUOT_TRANSFER(inode, iattr) (0)
	static inline int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
	{
	inode_add_bytes(inode, nr);
	return 0;
	}

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

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

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

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

	static inline void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
	{
	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
	mark_inode_dirty(inode);
	}

	#endif /* CONFIG_QUOTA */

	#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
	#define DQUOT_PREALLOC_BLOCK(inode, nr) DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
	#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
	#define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
	#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
	#define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)

	#endif /* _LINUX_QUOTAOPS_ */