393 lines
10 KiB
C
393 lines
10 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>
|
|
|
|
#define DQUOT_SPACE_WARN 0x1
|
|
#define DQUOT_SPACE_RESERVE 0x2
|
|
#define DQUOT_SPACE_NOFAIL 0x4
|
|
|
|
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 && !uid_eq(ia->ia_uid, inode->i_uid)) ||
|
|
(ia->ia_valid & ATTR_GID && !gid_eq(ia->ia_gid, inode->i_gid));
|
|
}
|
|
|
|
#if defined(CONFIG_QUOTA)
|
|
|
|
#define quota_error(sb, fmt, args...) \
|
|
__quota_error((sb), __func__, fmt , ## args)
|
|
|
|
extern __printf(3, 4)
|
|
void __quota_error(struct super_block *sb, const char *func,
|
|
const char *fmt, ...);
|
|
|
|
/*
|
|
* 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 inode_reclaim_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, struct kqid qid);
|
|
static inline struct dquot *dqgrab(struct dquot *dquot)
|
|
{
|
|
/* Make sure someone else has active reference to dquot */
|
|
WARN_ON_ONCE(!atomic_read(&dquot->dq_count));
|
|
WARN_ON_ONCE(!test_bit(DQ_ACTIVE_B, &dquot->dq_flags));
|
|
atomic_inc(&dquot->dq_count);
|
|
return dquot;
|
|
}
|
|
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 flags);
|
|
void __dquot_free_space(struct inode *inode, qsize_t number, int flags);
|
|
|
|
int dquot_alloc_inode(struct inode *inode);
|
|
|
|
int dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
|
|
void dquot_free_inode(struct inode *inode);
|
|
void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);
|
|
|
|
int dquot_disable(struct super_block *sb, int type, unsigned int flags);
|
|
/* Suspend quotas on remount RO */
|
|
static inline int dquot_suspend(struct super_block *sb, int type)
|
|
{
|
|
return dquot_disable(sb, type, DQUOT_SUSPENDED);
|
|
}
|
|
int dquot_resume(struct super_block *sb, int type);
|
|
|
|
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 dquot_enable(struct inode *inode, int type, int format_id,
|
|
unsigned int flags);
|
|
int dquot_quota_on(struct super_block *sb, int type, int format_id,
|
|
struct path *path);
|
|
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
|
|
int format_id, int type);
|
|
int dquot_quota_off(struct super_block *sb, int type);
|
|
int dquot_writeback_dquots(struct super_block *sb, int type);
|
|
int dquot_quota_sync(struct super_block *sb, int type);
|
|
int dquot_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
|
|
int dquot_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
|
|
int dquot_get_dqblk(struct super_block *sb, struct kqid id,
|
|
struct qc_dqblk *di);
|
|
int dquot_set_dqblk(struct super_block *sb, struct kqid id,
|
|
struct qc_dqblk *di);
|
|
|
|
int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
|
|
int dquot_transfer(struct inode *inode, struct iattr *iattr);
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* Operations supported for diskquotas.
|
|
*/
|
|
extern const struct dquot_operations dquot_operations;
|
|
extern const struct quotactl_ops dquot_quotactl_ops;
|
|
extern const struct quotactl_ops dquot_quotactl_sysfile_ops;
|
|
|
|
#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 void dquot_initialize(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline void dquot_drop(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline int dquot_alloc_inode(struct inode *inode)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void dquot_free_inode(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
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 flags)
|
|
{
|
|
if (!(flags & DQUOT_SPACE_RESERVE))
|
|
inode_add_bytes(inode, number);
|
|
return 0;
|
|
}
|
|
|
|
static inline void __dquot_free_space(struct inode *inode, qsize_t number,
|
|
int flags)
|
|
{
|
|
if (!(flags & DQUOT_SPACE_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;
|
|
}
|
|
|
|
static inline int dquot_reclaim_space_nodirty(struct inode *inode,
|
|
qsize_t number)
|
|
{
|
|
inode_sub_bytes(inode, number);
|
|
return 0;
|
|
}
|
|
|
|
static inline int dquot_disable(struct super_block *sb, int type,
|
|
unsigned int flags)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dquot_suspend(struct super_block *sb, int type)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int dquot_resume(struct super_block *sb, int type)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#define dquot_file_open generic_file_open
|
|
|
|
static inline int dquot_writeback_dquots(struct super_block *sb, int type)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_QUOTA */
|
|
|
|
static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
|
|
{
|
|
return __dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN);
|
|
}
|
|
|
|
static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
|
|
{
|
|
__dquot_alloc_space(inode, nr, DQUOT_SPACE_WARN|DQUOT_SPACE_NOFAIL);
|
|
mark_inode_dirty_sync(inode);
|
|
}
|
|
|
|
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 fully dirty. Since we are allocating blocks, inode
|
|
* would become fully dirty soon anyway and it reportedly
|
|
* reduces lock contention.
|
|
*/
|
|
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 void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
|
|
{
|
|
dquot_alloc_space_nofail(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);
|
|
}
|
|
|
|
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_sync(inode);
|
|
return ret;
|
|
}
|
|
|
|
static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
return __dquot_alloc_space(inode, nr << inode->i_blkbits,
|
|
DQUOT_SPACE_WARN|DQUOT_SPACE_RESERVE);
|
|
}
|
|
|
|
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_sync(inode);
|
|
return ret;
|
|
}
|
|
|
|
static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
|
|
{
|
|
dquot_reclaim_space_nodirty(inode, nr << inode->i_blkbits);
|
|
mark_inode_dirty_sync(inode);
|
|
}
|
|
|
|
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_sync(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, DQUOT_SPACE_RESERVE);
|
|
}
|
|
|
|
unsigned int qtype_enforce_flag(int type);
|
|
|
|
#endif /* _LINUX_QUOTAOPS_ */
|