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422 giacomo 1
/*
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 * Definitions for diskquota-operations. When diskquota is configured these
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 * macros expand to the right source-code.
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 *
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 * Author:  Marco van Wieringen <mvw@planets.elm.net>
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 *
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 * Version: $Id: quotaops.h,v 1.1 2004-01-28 15:26:25 giacomo Exp $
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 *
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 */
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#ifndef _LINUX_QUOTAOPS_
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#define _LINUX_QUOTAOPS_
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#include <linux/config.h>
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#include <linux/smp_lock.h>
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#include <linux/fs.h>
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#if defined(CONFIG_QUOTA)
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/*
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 * declaration of quota_function calls in kernel.
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 */
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extern void sync_dquots(struct super_block *sb, int type);
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extern void dquot_initialize(struct inode *inode, int type);
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extern void dquot_drop(struct inode *inode);
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extern int  dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
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extern int  dquot_alloc_inode(const struct inode *inode, unsigned long number);
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extern void dquot_free_space(struct inode *inode, qsize_t number);
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extern void dquot_free_inode(const struct inode *inode, unsigned long number);
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extern int  dquot_transfer(struct inode *inode, struct iattr *iattr);
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/*
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 * Operations supported for diskquotas.
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 */
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extern struct dquot_operations dquot_operations;
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extern struct quotactl_ops vfs_quotactl_ops;
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#define sb_dquot_ops (&dquot_operations)
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#define sb_quotactl_ops (&vfs_quotactl_ops)
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static __inline__ void DQUOT_INIT(struct inode *inode)
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{
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        if (!inode->i_sb)
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                BUG();
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        if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode))
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                inode->i_sb->dq_op->initialize(inode, -1);
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}
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static __inline__ void DQUOT_DROP(struct inode *inode)
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{
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        if (IS_QUOTAINIT(inode)) {
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                if (!inode->i_sb)
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                        BUG();
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                inode->i_sb->dq_op->drop(inode);        /* Ops must be set when there's any quota... */
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        }
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}
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static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
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        if (sb_any_quota_enabled(inode->i_sb)) {
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                /* Used space is updated in alloc_space() */
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                if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA)
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                        return 1;
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        }
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        else {
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                spin_lock(&dq_data_lock);
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                inode_add_bytes(inode, nr);
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                spin_unlock(&dq_data_lock);
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        }
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        return 0;
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}
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static __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
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{
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        int ret;
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        if (!(ret =  DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
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                mark_inode_dirty(inode);
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        return ret;
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}
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static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
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        if (sb_any_quota_enabled(inode->i_sb)) {
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                /* Used space is updated in alloc_space() */
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                if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA)
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                        return 1;
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        }
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        else {
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                spin_lock(&dq_data_lock);
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                inode_add_bytes(inode, nr);
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                spin_unlock(&dq_data_lock);
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        }
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        return 0;
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}
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static __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
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{
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        int ret;
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        if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
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                mark_inode_dirty(inode);
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        return ret;
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}
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static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
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{
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        if (sb_any_quota_enabled(inode->i_sb)) {
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                DQUOT_INIT(inode);
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                if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
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                        return 1;
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        }
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        return 0;
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}
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static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
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        if (sb_any_quota_enabled(inode->i_sb))
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                inode->i_sb->dq_op->free_space(inode, nr);
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        else {
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                spin_lock(&dq_data_lock);
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                inode_sub_bytes(inode, nr);
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                spin_unlock(&dq_data_lock);
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        }
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}
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static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
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{
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        DQUOT_FREE_SPACE_NODIRTY(inode, nr);
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        mark_inode_dirty(inode);
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}
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static __inline__ void DQUOT_FREE_INODE(struct inode *inode)
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{
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        if (sb_any_quota_enabled(inode->i_sb))
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                inode->i_sb->dq_op->free_inode(inode, 1);
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}
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static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
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{
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        if (sb_any_quota_enabled(inode->i_sb) && !IS_NOQUOTA(inode)) {
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                DQUOT_INIT(inode);
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                if (inode->i_sb->dq_op->transfer(inode, iattr) == NO_QUOTA)
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                        return 1;
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        }
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        return 0;
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}
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#define DQUOT_SYNC(sb)  sync_dquots(sb, -1)
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static __inline__ int DQUOT_OFF(struct super_block *sb)
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{
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        int ret = -ENOSYS;
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        if (sb->s_qcop && sb->s_qcop->quota_off)
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                ret = sb->s_qcop->quota_off(sb, -1);
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        return ret;
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}
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#else
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/*
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 * NO-OP when quota not configured.
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 */
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#define sb_dquot_ops                            (NULL)
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#define sb_quotactl_ops                         (NULL)
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#define sync_dquots_dev(dev,type)               (NULL)
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#define DQUOT_INIT(inode)                       do { } while(0)
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#define DQUOT_DROP(inode)                       do { } while(0)
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#define DQUOT_ALLOC_INODE(inode)                (0)
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#define DQUOT_FREE_INODE(inode)                 do { } while(0)
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#define DQUOT_SYNC(sb)                          do { } while(0)
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#define DQUOT_OFF(sb)                           do { } while(0)
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#define DQUOT_TRANSFER(inode, iattr)            (0)
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extern __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
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        inode_add_bytes(inode, nr);
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        return 0;
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}
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extern __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
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{
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        DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
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        mark_inode_dirty(inode);
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        return 0;
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}
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extern __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
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        inode_add_bytes(inode, nr);
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        return 0;
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}
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extern __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
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{
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        DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
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        mark_inode_dirty(inode);
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        return 0;
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}
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extern __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
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{
205
        inode_sub_bytes(inode, nr);
206
}
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extern __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
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{
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        DQUOT_FREE_SPACE_NODIRTY(inode, nr);
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        mark_inode_dirty(inode);
212
}      
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214
#endif /* CONFIG_QUOTA */
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#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#define DQUOT_PREALLOC_BLOCK(inode, nr) DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
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#endif /* _LINUX_QUOTAOPS_ */