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/*
* 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>
#if defined(CONFIG_QUOTA)
#include <linux/fs.h>
/*
* declaration of quota_function calls in kernel.
*/
extern void dquot_initialize(struct inode *inode, short type);
extern void dquot_drop(struct inode *inode);
extern int quota_off(struct super_block *sb, short type);
extern int sync_dquots(kdev_t dev, short type);
extern int dquot_alloc_block(struct inode *inode, unsigned long number, char prealloc);
extern int dquot_alloc_inode(const struct inode *inode, unsigned long number);
extern void dquot_free_block(struct inode *inode, unsigned long number);
extern void dquot_free_inode(const struct inode *inode, unsigned long number);
extern int dquot_transfer(struct inode *inode, struct iattr *iattr);
/*
* Operations supported for diskquotas.
*/
#define sb_any_quota_enabled(sb) ((sb)->s_dquot.flags & (DQUOT_USR_ENABLED | DQUOT_GRP_ENABLED))
static __inline__ void DQUOT_INIT(struct inode *inode)
{
if (!inode->i_sb)
BUG();
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
inode->i_sb->dq_op->initialize(inode, -1);
unlock_kernel();
}
static __inline__ void DQUOT_DROP(struct inode *inode)
{
lock_kernel();
if (IS_QUOTAINIT(inode)) {
if (!inode->i_sb)
BUG();
inode->i_sb->dq_op->drop(inode); /* Ops must be set when there's any quota... */
}
unlock_kernel();
}
static __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb)) {
/* Number of used blocks is updated in alloc_block() */
if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 1) == NO_QUOTA) {
unlock_kernel();
return 1;
}
}
else
inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
return 0;
}
static __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
{
int ret;
if (!(ret = DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr)))
mark_inode_dirty(inode);
return ret;
}
static __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb)) {
/* Number of used blocks is updated in alloc_block() */
if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 0) == NO_QUOTA) {
unlock_kernel();
return 1;
}
}
else
inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
return 0;
}
static __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
{
int ret;
if (!(ret = DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr)))
mark_inode_dirty(inode);
return ret;
}
static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
{
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb)) {
DQUOT_INIT(inode);
if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA) {
unlock_kernel();
return 1;
}
}
unlock_kernel();
return 0;
}
static __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb))
inode->i_sb->dq_op->free_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize));
else
inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
}
static __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
{
DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
mark_inode_dirty(inode);
}
static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
{
lock_kernel();
if (sb_any_quota_enabled(inode->i_sb))
inode->i_sb->dq_op->free_inode(inode, 1);
unlock_kernel();
}
static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
{
lock_kernel();
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) {
unlock_kernel();
return 1;
}
}
unlock_kernel();
return 0;
}
#define DQUOT_SYNC(dev) sync_dquots(dev, -1)
#define DQUOT_OFF(sb) quota_off(sb, -1)
#else
/*
* NO-OP when quota not configured.
*/
#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(dev) do { } while(0)
#define DQUOT_OFF(sb) do { } while(0)
#define DQUOT_TRANSFER(inode, iattr) (0)
extern __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
return 0;
}
extern __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
{
DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr);
mark_inode_dirty(inode);
return 0;
}
extern __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
return 0;
}
extern __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
{
DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr);
mark_inode_dirty(inode);
return 0;
}
extern __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
{
lock_kernel();
inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
unlock_kernel();
}
extern __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
{
DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
mark_inode_dirty(inode);
}
#endif /* CONFIG_QUOTA */
#endif /* _LINUX_QUOTAOPS_ */
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