mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
243 lines
6.1 KiB
243 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (c) 2000-2005 Silicon Graphics, Inc. |
|
* All Rights Reserved. |
|
*/ |
|
#ifndef __XFS_DQUOT_H__ |
|
#define __XFS_DQUOT_H__ |
|
|
|
/* |
|
* Dquots are structures that hold quota information about a user or a group, |
|
* much like inodes are for files. In fact, dquots share many characteristics |
|
* with inodes. However, dquots can also be a centralized resource, relative |
|
* to a collection of inodes. In this respect, dquots share some characteristics |
|
* of the superblock. |
|
* XFS dquots exploit both those in its algorithms. They make every attempt |
|
* to not be a bottleneck when quotas are on and have minimal impact, if any, |
|
* when quotas are off. |
|
*/ |
|
|
|
struct xfs_mount; |
|
struct xfs_trans; |
|
|
|
enum { |
|
XFS_QLOWSP_1_PCNT = 0, |
|
XFS_QLOWSP_3_PCNT, |
|
XFS_QLOWSP_5_PCNT, |
|
XFS_QLOWSP_MAX |
|
}; |
|
|
|
struct xfs_dquot_res { |
|
/* Total resources allocated and reserved. */ |
|
xfs_qcnt_t reserved; |
|
|
|
/* Total resources allocated. */ |
|
xfs_qcnt_t count; |
|
|
|
/* Absolute and preferred limits. */ |
|
xfs_qcnt_t hardlimit; |
|
xfs_qcnt_t softlimit; |
|
|
|
/* |
|
* For root dquots, this is the default grace period, in seconds. |
|
* Otherwise, this is when the quota grace period expires, |
|
* in seconds since the Unix epoch. |
|
*/ |
|
time64_t timer; |
|
|
|
/* |
|
* For root dquots, this is the maximum number of warnings that will |
|
* be issued for this quota type. Otherwise, this is the number of |
|
* warnings issued against this quota. Note that none of this is |
|
* implemented. |
|
*/ |
|
xfs_qwarncnt_t warnings; |
|
}; |
|
|
|
/* |
|
* The incore dquot structure |
|
*/ |
|
struct xfs_dquot { |
|
struct list_head q_lru; |
|
struct xfs_mount *q_mount; |
|
xfs_dqtype_t q_type; |
|
uint16_t q_flags; |
|
xfs_dqid_t q_id; |
|
uint q_nrefs; |
|
int q_bufoffset; |
|
xfs_daddr_t q_blkno; |
|
xfs_fileoff_t q_fileoffset; |
|
|
|
struct xfs_dquot_res q_blk; /* regular blocks */ |
|
struct xfs_dquot_res q_ino; /* inodes */ |
|
struct xfs_dquot_res q_rtb; /* realtime blocks */ |
|
|
|
struct xfs_dq_logitem q_logitem; |
|
|
|
xfs_qcnt_t q_prealloc_lo_wmark; |
|
xfs_qcnt_t q_prealloc_hi_wmark; |
|
int64_t q_low_space[XFS_QLOWSP_MAX]; |
|
struct mutex q_qlock; |
|
struct completion q_flush; |
|
atomic_t q_pincount; |
|
struct wait_queue_head q_pinwait; |
|
}; |
|
|
|
/* |
|
* Lock hierarchy for q_qlock: |
|
* XFS_QLOCK_NORMAL is the implicit default, |
|
* XFS_QLOCK_NESTED is the dquot with the higher id in xfs_dqlock2 |
|
*/ |
|
enum { |
|
XFS_QLOCK_NORMAL = 0, |
|
XFS_QLOCK_NESTED, |
|
}; |
|
|
|
/* |
|
* Manage the q_flush completion queue embedded in the dquot. This completion |
|
* queue synchronizes processes attempting to flush the in-core dquot back to |
|
* disk. |
|
*/ |
|
static inline void xfs_dqflock(struct xfs_dquot *dqp) |
|
{ |
|
wait_for_completion(&dqp->q_flush); |
|
} |
|
|
|
static inline bool xfs_dqflock_nowait(struct xfs_dquot *dqp) |
|
{ |
|
return try_wait_for_completion(&dqp->q_flush); |
|
} |
|
|
|
static inline void xfs_dqfunlock(struct xfs_dquot *dqp) |
|
{ |
|
complete(&dqp->q_flush); |
|
} |
|
|
|
static inline int xfs_dqlock_nowait(struct xfs_dquot *dqp) |
|
{ |
|
return mutex_trylock(&dqp->q_qlock); |
|
} |
|
|
|
static inline void xfs_dqlock(struct xfs_dquot *dqp) |
|
{ |
|
mutex_lock(&dqp->q_qlock); |
|
} |
|
|
|
static inline void xfs_dqunlock(struct xfs_dquot *dqp) |
|
{ |
|
mutex_unlock(&dqp->q_qlock); |
|
} |
|
|
|
static inline int |
|
xfs_dquot_type(const struct xfs_dquot *dqp) |
|
{ |
|
return dqp->q_type & XFS_DQTYPE_REC_MASK; |
|
} |
|
|
|
static inline int xfs_this_quota_on(struct xfs_mount *mp, xfs_dqtype_t type) |
|
{ |
|
switch (type) { |
|
case XFS_DQTYPE_USER: |
|
return XFS_IS_UQUOTA_ON(mp); |
|
case XFS_DQTYPE_GROUP: |
|
return XFS_IS_GQUOTA_ON(mp); |
|
case XFS_DQTYPE_PROJ: |
|
return XFS_IS_PQUOTA_ON(mp); |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static inline struct xfs_dquot *xfs_inode_dquot( |
|
struct xfs_inode *ip, |
|
xfs_dqtype_t type) |
|
{ |
|
switch (type) { |
|
case XFS_DQTYPE_USER: |
|
return ip->i_udquot; |
|
case XFS_DQTYPE_GROUP: |
|
return ip->i_gdquot; |
|
case XFS_DQTYPE_PROJ: |
|
return ip->i_pdquot; |
|
default: |
|
return NULL; |
|
} |
|
} |
|
|
|
/* Decide if the dquot's limits are actually being enforced. */ |
|
static inline bool |
|
xfs_dquot_is_enforced( |
|
const struct xfs_dquot *dqp) |
|
{ |
|
switch (xfs_dquot_type(dqp)) { |
|
case XFS_DQTYPE_USER: |
|
return XFS_IS_UQUOTA_ENFORCED(dqp->q_mount); |
|
case XFS_DQTYPE_GROUP: |
|
return XFS_IS_GQUOTA_ENFORCED(dqp->q_mount); |
|
case XFS_DQTYPE_PROJ: |
|
return XFS_IS_PQUOTA_ENFORCED(dqp->q_mount); |
|
} |
|
ASSERT(0); |
|
return false; |
|
} |
|
|
|
/* |
|
* Check whether a dquot is under low free space conditions. We assume the quota |
|
* is enabled and enforced. |
|
*/ |
|
static inline bool xfs_dquot_lowsp(struct xfs_dquot *dqp) |
|
{ |
|
int64_t freesp; |
|
|
|
freesp = dqp->q_blk.hardlimit - dqp->q_blk.reserved; |
|
if (freesp < dqp->q_low_space[XFS_QLOWSP_1_PCNT]) |
|
return true; |
|
|
|
return false; |
|
} |
|
|
|
void xfs_dquot_to_disk(struct xfs_disk_dquot *ddqp, struct xfs_dquot *dqp); |
|
|
|
#define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock))) |
|
#define XFS_DQ_IS_DIRTY(dqp) ((dqp)->q_flags & XFS_DQFLAG_DIRTY) |
|
|
|
void xfs_qm_dqdestroy(struct xfs_dquot *dqp); |
|
int xfs_qm_dqflush(struct xfs_dquot *dqp, struct xfs_buf **bpp); |
|
void xfs_qm_dqunpin_wait(struct xfs_dquot *dqp); |
|
void xfs_qm_adjust_dqtimers(struct xfs_dquot *d); |
|
void xfs_qm_adjust_dqlimits(struct xfs_dquot *d); |
|
xfs_dqid_t xfs_qm_id_for_quotatype(struct xfs_inode *ip, |
|
xfs_dqtype_t type); |
|
int xfs_qm_dqget(struct xfs_mount *mp, xfs_dqid_t id, |
|
xfs_dqtype_t type, bool can_alloc, |
|
struct xfs_dquot **dqpp); |
|
int xfs_qm_dqget_inode(struct xfs_inode *ip, xfs_dqtype_t type, |
|
bool can_alloc, struct xfs_dquot **dqpp); |
|
int xfs_qm_dqget_next(struct xfs_mount *mp, xfs_dqid_t id, |
|
xfs_dqtype_t type, struct xfs_dquot **dqpp); |
|
int xfs_qm_dqget_uncached(struct xfs_mount *mp, |
|
xfs_dqid_t id, xfs_dqtype_t type, |
|
struct xfs_dquot **dqpp); |
|
void xfs_qm_dqput(struct xfs_dquot *dqp); |
|
|
|
void xfs_dqlock2(struct xfs_dquot *, struct xfs_dquot *); |
|
|
|
void xfs_dquot_set_prealloc_limits(struct xfs_dquot *); |
|
|
|
static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) |
|
{ |
|
xfs_dqlock(dqp); |
|
dqp->q_nrefs++; |
|
xfs_dqunlock(dqp); |
|
return dqp; |
|
} |
|
|
|
typedef int (*xfs_qm_dqiterate_fn)(struct xfs_dquot *dq, |
|
xfs_dqtype_t type, void *priv); |
|
int xfs_qm_dqiterate(struct xfs_mount *mp, xfs_dqtype_t type, |
|
xfs_qm_dqiterate_fn iter_fn, void *priv); |
|
|
|
time64_t xfs_dquot_set_timeout(struct xfs_mount *mp, time64_t timeout); |
|
time64_t xfs_dquot_set_grace_period(time64_t grace); |
|
|
|
#endif /* __XFS_DQUOT_H__ */
|
|
|