mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Darrick J. Wong](/assets/img/avatar_default.png)
Refactor the code that sets the default quota grace period into a helper function so that we can override the ondisk behavior later. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Allison Collins <allison.henderson@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
243 lines
6.1 KiB
C
243 lines
6.1 KiB
C
// 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__ */
|