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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>
*/
#ifndef _LINUX_QUOTAOPS_
#define _LINUX_QUOTAOPS_
#include <linux/fs.h>
static inline struct quota_info *sb_dqopt(struct super_block *sb)
{
return &sb->s_dquot;
}
/* i_mutex must being held */
static inline bool is_quota_modification(struct inode *inode, struct iattr *ia)
{
return (ia->ia_valid & ATTR_SIZE && ia->ia_size != inode->i_size) ||
(ia->ia_valid & ATTR_UID && ia->ia_uid != inode->i_uid) ||
(ia->ia_valid & ATTR_GID && ia->ia_gid != inode->i_gid);
}
#if defined(CONFIG_QUOTA)
/*
* declaration of quota_function calls in kernel.
*/
void inode_add_rsv_space(struct inode *inode, qsize_t number);
void inode_claim_rsv_space(struct inode *inode, qsize_t number);
void inode_sub_rsv_space(struct inode *inode, qsize_t number);
void dquot_initialize(struct inode *inode);
void 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 warn, int reserve);
void __dquot_free_space(struct inode *inode, qsize_t number, int reserve);
int dquot_alloc_inode(const struct inode *inode);
int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
void dquot_free_inode(const struct inode *inode);
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 dquot_file_open(struct inode *inode, struct file *file);
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 wait);
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 fs_disk_quota *di);
int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
struct fs_disk_quota *di);
int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
int dquot_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 bool 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 bool 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 bool sb_has_quota_suspended(struct super_block *sb, int type)
{
return sb_dqopt(sb)->flags &
dquot_state_flag(DQUOT_SUSPENDED, type);
}
static inline unsigned sb_any_quota_suspended(struct super_block *sb)
{
unsigned type, tmsk = 0;
for (type = 0; type < MAXQUOTAS; type++)
tmsk |= sb_has_quota_suspended(sb, type) << type;
return tmsk;
}
/* Does kernel know about any quota information for given sb + type? */
static inline bool 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 unsigned sb_any_quota_loaded(struct super_block *sb)
{
unsigned type, tmsk = 0;
for (type = 0; type < MAXQUOTAS; type++)
tmsk |= sb_has_quota_loaded(sb, type) << type;
return tmsk;
}
static inline bool 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 unsigned sb_any_quota_active(struct super_block *sb)
{
return sb_any_quota_loaded(sb) & ~sb_any_quota_suspended(sb);
}
/*
* Operations supported for diskquotas.
*/
extern const struct dquot_operations dquot_operations;
extern const struct quotactl_ops vfs_quotactl_ops;
#define sb_dquot_ops (&dquot_operations)
#define sb_quotactl_ops (&vfs_quotactl_ops)
/* Cannot be called inside a transaction */
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 dquot_initialize(struct inode *inode)
{
}
static inline void dquot_drop(struct inode *inode)
{
}
static inline int dquot_alloc_inode(const struct inode *inode)
{
return 0;
}
static inline void dquot_free_inode(const struct inode *inode)
{
}
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 dquot_transfer(struct inode *inode, struct iattr *iattr)
{
return 0;
}
static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
int warn, int reserve)
{
if (!reserve)
inode_add_bytes(inode, number);
return 0;
}
static inline void __dquot_free_space(struct inode *inode, qsize_t number,
int reserve)
{
if (!reserve)
inode_sub_bytes(inode, number);
}
static inline int dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
{
inode_add_bytes(inode, number);
return 0;
}
#define dquot_file_open generic_file_open
#endif /* CONFIG_QUOTA */
static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
{
return __dquot_alloc_space(inode, nr, 1, 0);
}
static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
{
int ret;
ret = dquot_alloc_space_nodirty(inode, nr);
if (!ret)
mark_inode_dirty(inode);
return ret;
}
static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
{
return dquot_alloc_space_nodirty(inode, nr << inode->i_blkbits);
}
static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
{
return dquot_alloc_space(inode, nr << inode->i_blkbits);
}
static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
{
return __dquot_alloc_space(inode, nr << inode->i_blkbits, 0, 0);
}
static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
{
int ret;
ret = dquot_prealloc_block_nodirty(inode, nr);
if (!ret)
mark_inode_dirty(inode);
return ret;
}
static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
{
return __dquot_alloc_space(inode, nr << inode->i_blkbits, 1, 1);
}
static inline int dquot_claim_block(struct inode *inode, qsize_t nr)
{
int ret;
ret = dquot_claim_space_nodirty(inode, nr << inode->i_blkbits);
if (!ret)
mark_inode_dirty(inode);
return ret;
}
static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
{
__dquot_free_space(inode, nr, 0);
}
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_block_nodirty(struct inode *inode, qsize_t nr)
{
dquot_free_space_nodirty(inode, nr << inode->i_blkbits);
}
static inline void dquot_free_block(struct inode *inode, qsize_t nr)
{
dquot_free_space(inode, nr << inode->i_blkbits);
}
static inline void dquot_release_reservation_block(struct inode *inode,
qsize_t nr)
{
__dquot_free_space(inode, nr << inode->i_blkbits, 1);
}
#endif /* _LINUX_QUOTAOPS_ */
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