468 lines
12 KiB
C
468 lines
12 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|
|
#if defined(CONFIG_QUOTA)
|
|
|
|
/*
|
|
* declaration of quota_function calls in kernel.
|
|
*/
|
|
void sync_quota_sb(struct super_block *sb, int type);
|
|
static inline void writeout_quota_sb(struct super_block *sb, int type)
|
|
{
|
|
if (sb->s_qcop->quota_sync)
|
|
sb->s_qcop->quota_sync(sb, type);
|
|
}
|
|
|
|
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);
|
|
|
|
int dquot_initialize(struct inode *inode, int type);
|
|
int 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 prealloc);
|
|
int dquot_alloc_inode(const struct inode *inode, qsize_t number);
|
|
|
|
int dquot_reserve_space(struct inode *inode, qsize_t number, int prealloc);
|
|
int dquot_claim_space(struct inode *inode, qsize_t number);
|
|
void dquot_release_reserved_space(struct inode *inode, qsize_t number);
|
|
|
|
int dquot_free_space(struct inode *inode, qsize_t number);
|
|
int dquot_free_inode(const struct inode *inode, qsize_t number);
|
|
|
|
int dquot_transfer(struct inode *inode, struct iattr *iattr);
|
|
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 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 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 if_dqblk *di);
|
|
int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
|
|
|
|
void vfs_dq_drop(struct inode *inode);
|
|
int vfs_dq_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 int 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 int 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 int sb_has_quota_suspended(struct super_block *sb, int type)
|
|
{
|
|
return sb_dqopt(sb)->flags &
|
|
dquot_state_flag(DQUOT_SUSPENDED, type);
|
|
}
|
|
|
|
static inline int sb_any_quota_suspended(struct super_block *sb)
|
|
{
|
|
return sb_has_quota_suspended(sb, USRQUOTA) ||
|
|
sb_has_quota_suspended(sb, GRPQUOTA);
|
|
}
|
|
|
|
/* Does kernel know about any quota information for given sb + type? */
|
|
static inline int 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 int sb_any_quota_loaded(struct super_block *sb)
|
|
{
|
|
return sb_has_quota_loaded(sb, USRQUOTA) ||
|
|
sb_has_quota_loaded(sb, GRPQUOTA);
|
|
}
|
|
|
|
static inline int 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 int sb_any_quota_active(struct super_block *sb)
|
|
{
|
|
return sb_has_quota_active(sb, USRQUOTA) ||
|
|
sb_has_quota_active(sb, GRPQUOTA);
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
|
|
/* 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 vfs_dq_init(struct inode *inode)
|
|
{
|
|
BUG_ON(!inode->i_sb);
|
|
if (sb_any_quota_active(inode->i_sb) && !IS_NOQUOTA(inode))
|
|
inode->i_sb->dq_op->initialize(inode, -1);
|
|
}
|
|
|
|
/* The following allocation/freeing/transfer functions *must* be called inside
|
|
* a transaction (deadlocks possible otherwise) */
|
|
static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(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 vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
int ret;
|
|
if (!(ret = vfs_dq_prealloc_space_nodirty(inode, nr)))
|
|
mark_inode_dirty(inode);
|
|
return ret;
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(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 vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
int ret;
|
|
if (!(ret = vfs_dq_alloc_space_nodirty(inode, nr)))
|
|
mark_inode_dirty(inode);
|
|
return ret;
|
|
}
|
|
|
|
static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb)) {
|
|
/* Used space is updated in alloc_space() */
|
|
if (inode->i_sb->dq_op->reserve_space(inode, nr, 0) == NO_QUOTA)
|
|
return 1;
|
|
}
|
|
else
|
|
inode_add_rsv_space(inode, nr);
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_inode(struct inode *inode)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb)) {
|
|
vfs_dq_init(inode);
|
|
if (inode->i_sb->dq_op->alloc_inode(inode, 1) == NO_QUOTA)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Convert in-memory reserved quotas to real consumed quotas
|
|
*/
|
|
static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb)) {
|
|
if (inode->i_sb->dq_op->claim_space(inode, nr) == NO_QUOTA)
|
|
return 1;
|
|
} else
|
|
inode_claim_rsv_space(inode, nr);
|
|
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Release reserved (in-memory) quotas
|
|
*/
|
|
static inline
|
|
void vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb))
|
|
inode->i_sb->dq_op->release_rsv(inode, nr);
|
|
else
|
|
inode_sub_rsv_space(inode, nr);
|
|
}
|
|
|
|
static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb))
|
|
inode->i_sb->dq_op->free_space(inode, nr);
|
|
else
|
|
inode_sub_bytes(inode, nr);
|
|
}
|
|
|
|
static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_free_space_nodirty(inode, nr);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
static inline void vfs_dq_free_inode(struct inode *inode)
|
|
{
|
|
if (sb_any_quota_active(inode->i_sb))
|
|
inode->i_sb->dq_op->free_inode(inode, 1);
|
|
}
|
|
|
|
/* 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 vfs_dq_init(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline void vfs_dq_drop(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_inode(struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void vfs_dq_free_inode(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline void sync_quota_sb(struct super_block *sb, int type)
|
|
{
|
|
}
|
|
|
|
static inline void writeout_quota_sb(struct super_block *sb, int type)
|
|
{
|
|
}
|
|
|
|
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 vfs_dq_transfer(struct inode *inode, struct iattr *iattr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_prealloc_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
inode_add_bytes(inode, nr);
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_prealloc_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_prealloc_space_nodirty(inode, nr);
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
inode_add_bytes(inode, nr);
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_alloc_space_nodirty(inode, nr);
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_reserve_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int vfs_dq_claim_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_alloc_space(inode, nr);
|
|
}
|
|
|
|
static inline
|
|
int vfs_dq_release_reservation_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void vfs_dq_free_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
inode_sub_bytes(inode, nr);
|
|
}
|
|
|
|
static inline void vfs_dq_free_space(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_free_space_nodirty(inode, nr);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
#endif /* CONFIG_QUOTA */
|
|
|
|
static inline int vfs_dq_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_prealloc_space_nodirty(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline int vfs_dq_prealloc_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_prealloc_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_block_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_alloc_space_nodirty(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline int vfs_dq_alloc_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_alloc_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline int vfs_dq_reserve_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_reserve_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline int vfs_dq_claim_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
return vfs_dq_claim_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline
|
|
void vfs_dq_release_reservation_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_release_reservation_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline void vfs_dq_free_block_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_free_space_nodirty(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
static inline void vfs_dq_free_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
vfs_dq_free_space(inode, nr << inode->i_blkbits);
|
|
}
|
|
|
|
#endif /* _LINUX_QUOTAOPS_ */
|