linux/fs/xfs/xfs_trans_dquot.c
Kaixu Xia b3b29cd106 xfs: directly return if the delta equal to zero
The xfs_trans_mod_dquot() function will allocate new tp->t_dqinfo if
it is NULL and make the changes in the tp->t_dqinfo->dqs[XFS_QM_TRANS
_{USR,GRP,PRJ}]. Nowadays seems none of the callers want to join the
dquots to the transaction and push them to device when the delta is
zero. Actually, most of time the caller would check the delta and go
on only when the delta value is not zero, so we should bail out when
it is zero.

Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-12-09 09:49:38 -08:00

862 lines
20 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2002 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
#include "xfs_quota.h"
#include "xfs_qm.h"
#include "xfs_trace.h"
STATIC void xfs_trans_alloc_dqinfo(xfs_trans_t *);
/*
* Add the locked dquot to the transaction.
* The dquot must be locked, and it cannot be associated with any
* transaction.
*/
void
xfs_trans_dqjoin(
struct xfs_trans *tp,
struct xfs_dquot *dqp)
{
ASSERT(XFS_DQ_IS_LOCKED(dqp));
ASSERT(dqp->q_logitem.qli_dquot == dqp);
/*
* Get a log_item_desc to point at the new item.
*/
xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
}
/*
* This is called to mark the dquot as needing
* to be logged when the transaction is committed. The dquot must
* already be associated with the given transaction.
* Note that it marks the entire transaction as dirty. In the ordinary
* case, this gets called via xfs_trans_commit, after the transaction
* is already dirty. However, there's nothing stop this from getting
* called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
* flag.
*/
void
xfs_trans_log_dquot(
struct xfs_trans *tp,
struct xfs_dquot *dqp)
{
ASSERT(XFS_DQ_IS_LOCKED(dqp));
/* Upgrade the dquot to bigtime format if possible. */
if (dqp->q_id != 0 &&
xfs_sb_version_hasbigtime(&tp->t_mountp->m_sb) &&
!(dqp->q_type & XFS_DQTYPE_BIGTIME))
dqp->q_type |= XFS_DQTYPE_BIGTIME;
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
}
/*
* Carry forward whatever is left of the quota blk reservation to
* the spanky new transaction
*/
void
xfs_trans_dup_dqinfo(
struct xfs_trans *otp,
struct xfs_trans *ntp)
{
struct xfs_dqtrx *oq, *nq;
int i, j;
struct xfs_dqtrx *oqa, *nqa;
uint64_t blk_res_used;
if (!otp->t_dqinfo)
return;
xfs_trans_alloc_dqinfo(ntp);
for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
oqa = otp->t_dqinfo->dqs[j];
nqa = ntp->t_dqinfo->dqs[j];
for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
blk_res_used = 0;
if (oqa[i].qt_dquot == NULL)
break;
oq = &oqa[i];
nq = &nqa[i];
if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
blk_res_used = oq->qt_bcount_delta;
nq->qt_dquot = oq->qt_dquot;
nq->qt_bcount_delta = nq->qt_icount_delta = 0;
nq->qt_rtbcount_delta = 0;
/*
* Transfer whatever is left of the reservations.
*/
nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
oq->qt_blk_res = blk_res_used;
nq->qt_rtblk_res = oq->qt_rtblk_res -
oq->qt_rtblk_res_used;
oq->qt_rtblk_res = oq->qt_rtblk_res_used;
nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
oq->qt_ino_res = oq->qt_ino_res_used;
}
}
}
/*
* Wrap around mod_dquot to account for both user and group quotas.
*/
void
xfs_trans_mod_dquot_byino(
xfs_trans_t *tp,
xfs_inode_t *ip,
uint field,
int64_t delta)
{
xfs_mount_t *mp = tp->t_mountp;
if (!XFS_IS_QUOTA_RUNNING(mp) ||
!XFS_IS_QUOTA_ON(mp) ||
xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
return;
if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
(void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
(void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
(void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
}
STATIC struct xfs_dqtrx *
xfs_trans_get_dqtrx(
struct xfs_trans *tp,
struct xfs_dquot *dqp)
{
int i;
struct xfs_dqtrx *qa;
switch (xfs_dquot_type(dqp)) {
case XFS_DQTYPE_USER:
qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
break;
case XFS_DQTYPE_GROUP:
qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
break;
case XFS_DQTYPE_PROJ:
qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
break;
default:
return NULL;
}
for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
if (qa[i].qt_dquot == NULL ||
qa[i].qt_dquot == dqp)
return &qa[i];
}
return NULL;
}
/*
* Make the changes in the transaction structure.
* The moral equivalent to xfs_trans_mod_sb().
* We don't touch any fields in the dquot, so we don't care
* if it's locked or not (most of the time it won't be).
*/
void
xfs_trans_mod_dquot(
struct xfs_trans *tp,
struct xfs_dquot *dqp,
uint field,
int64_t delta)
{
struct xfs_dqtrx *qtrx;
ASSERT(tp);
ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
qtrx = NULL;
if (!delta)
return;
if (tp->t_dqinfo == NULL)
xfs_trans_alloc_dqinfo(tp);
/*
* Find either the first free slot or the slot that belongs
* to this dquot.
*/
qtrx = xfs_trans_get_dqtrx(tp, dqp);
ASSERT(qtrx);
if (qtrx->qt_dquot == NULL)
qtrx->qt_dquot = dqp;
trace_xfs_trans_mod_dquot_before(qtrx);
trace_xfs_trans_mod_dquot(tp, dqp, field, delta);
switch (field) {
/* regular disk blk reservation */
case XFS_TRANS_DQ_RES_BLKS:
qtrx->qt_blk_res += delta;
break;
/* inode reservation */
case XFS_TRANS_DQ_RES_INOS:
qtrx->qt_ino_res += delta;
break;
/* disk blocks used. */
case XFS_TRANS_DQ_BCOUNT:
qtrx->qt_bcount_delta += delta;
break;
case XFS_TRANS_DQ_DELBCOUNT:
qtrx->qt_delbcnt_delta += delta;
break;
/* Inode Count */
case XFS_TRANS_DQ_ICOUNT:
if (qtrx->qt_ino_res && delta > 0) {
qtrx->qt_ino_res_used += delta;
ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
}
qtrx->qt_icount_delta += delta;
break;
/* rtblk reservation */
case XFS_TRANS_DQ_RES_RTBLKS:
qtrx->qt_rtblk_res += delta;
break;
/* rtblk count */
case XFS_TRANS_DQ_RTBCOUNT:
if (qtrx->qt_rtblk_res && delta > 0) {
qtrx->qt_rtblk_res_used += delta;
ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
}
qtrx->qt_rtbcount_delta += delta;
break;
case XFS_TRANS_DQ_DELRTBCOUNT:
qtrx->qt_delrtb_delta += delta;
break;
default:
ASSERT(0);
}
trace_xfs_trans_mod_dquot_after(qtrx);
}
/*
* Given an array of dqtrx structures, lock all the dquots associated and join
* them to the transaction, provided they have been modified. We know that the
* highest number of dquots of one type - usr, grp and prj - involved in a
* transaction is 3 so we don't need to make this very generic.
*/
STATIC void
xfs_trans_dqlockedjoin(
struct xfs_trans *tp,
struct xfs_dqtrx *q)
{
ASSERT(q[0].qt_dquot != NULL);
if (q[1].qt_dquot == NULL) {
xfs_dqlock(q[0].qt_dquot);
xfs_trans_dqjoin(tp, q[0].qt_dquot);
} else {
ASSERT(XFS_QM_TRANS_MAXDQS == 2);
xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
xfs_trans_dqjoin(tp, q[0].qt_dquot);
xfs_trans_dqjoin(tp, q[1].qt_dquot);
}
}
/* Apply dqtrx changes to the quota reservation counters. */
static inline void
xfs_apply_quota_reservation_deltas(
struct xfs_dquot_res *res,
uint64_t reserved,
int64_t res_used,
int64_t count_delta)
{
if (reserved != 0) {
/*
* Subtle math here: If reserved > res_used (the normal case),
* we're simply subtracting the unused transaction quota
* reservation from the dquot reservation.
*
* If, however, res_used > reserved, then we have allocated
* more quota blocks than were reserved for the transaction.
* We must add that excess to the dquot reservation since it
* tracks (usage + resv) and by definition we didn't reserve
* that excess.
*/
res->reserved -= abs(reserved - res_used);
} else if (count_delta != 0) {
/*
* These blks were never reserved, either inside a transaction
* or outside one (in a delayed allocation). Also, this isn't
* always a negative number since we sometimes deliberately
* skip quota reservations.
*/
res->reserved += count_delta;
}
}
/*
* Called by xfs_trans_commit() and similar in spirit to
* xfs_trans_apply_sb_deltas().
* Go thru all the dquots belonging to this transaction and modify the
* INCORE dquot to reflect the actual usages.
* Unreserve just the reservations done by this transaction.
* dquot is still left locked at exit.
*/
void
xfs_trans_apply_dquot_deltas(
struct xfs_trans *tp)
{
int i, j;
struct xfs_dquot *dqp;
struct xfs_dqtrx *qtrx, *qa;
int64_t totalbdelta;
int64_t totalrtbdelta;
if (!tp->t_dqinfo)
return;
ASSERT(tp->t_dqinfo);
for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
qa = tp->t_dqinfo->dqs[j];
if (qa[0].qt_dquot == NULL)
continue;
/*
* Lock all of the dquots and join them to the transaction.
*/
xfs_trans_dqlockedjoin(tp, qa);
for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
uint64_t blk_res_used;
qtrx = &qa[i];
/*
* The array of dquots is filled
* sequentially, not sparsely.
*/
if ((dqp = qtrx->qt_dquot) == NULL)
break;
ASSERT(XFS_DQ_IS_LOCKED(dqp));
/*
* adjust the actual number of blocks used
*/
/*
* The issue here is - sometimes we don't make a blkquota
* reservation intentionally to be fair to users
* (when the amount is small). On the other hand,
* delayed allocs do make reservations, but that's
* outside of a transaction, so we have no
* idea how much was really reserved.
* So, here we've accumulated delayed allocation blks and
* non-delay blks. The assumption is that the
* delayed ones are always reserved (outside of a
* transaction), and the others may or may not have
* quota reservations.
*/
totalbdelta = qtrx->qt_bcount_delta +
qtrx->qt_delbcnt_delta;
totalrtbdelta = qtrx->qt_rtbcount_delta +
qtrx->qt_delrtb_delta;
if (totalbdelta != 0 || totalrtbdelta != 0 ||
qtrx->qt_icount_delta != 0) {
trace_xfs_trans_apply_dquot_deltas_before(dqp);
trace_xfs_trans_apply_dquot_deltas(qtrx);
}
#ifdef DEBUG
if (totalbdelta < 0)
ASSERT(dqp->q_blk.count >= -totalbdelta);
if (totalrtbdelta < 0)
ASSERT(dqp->q_rtb.count >= -totalrtbdelta);
if (qtrx->qt_icount_delta < 0)
ASSERT(dqp->q_ino.count >= -qtrx->qt_icount_delta);
#endif
if (totalbdelta)
dqp->q_blk.count += totalbdelta;
if (qtrx->qt_icount_delta)
dqp->q_ino.count += qtrx->qt_icount_delta;
if (totalrtbdelta)
dqp->q_rtb.count += totalrtbdelta;
if (totalbdelta != 0 || totalrtbdelta != 0 ||
qtrx->qt_icount_delta != 0)
trace_xfs_trans_apply_dquot_deltas_after(dqp);
/*
* Get any default limits in use.
* Start/reset the timer(s) if needed.
*/
if (dqp->q_id) {
xfs_qm_adjust_dqlimits(dqp);
xfs_qm_adjust_dqtimers(dqp);
}
dqp->q_flags |= XFS_DQFLAG_DIRTY;
/*
* add this to the list of items to get logged
*/
xfs_trans_log_dquot(tp, dqp);
/*
* Take off what's left of the original reservation.
* In case of delayed allocations, there's no
* reservation that a transaction structure knows of.
*/
blk_res_used = max_t(int64_t, 0, qtrx->qt_bcount_delta);
xfs_apply_quota_reservation_deltas(&dqp->q_blk,
qtrx->qt_blk_res, blk_res_used,
qtrx->qt_bcount_delta);
/*
* Adjust the RT reservation.
*/
xfs_apply_quota_reservation_deltas(&dqp->q_rtb,
qtrx->qt_rtblk_res,
qtrx->qt_rtblk_res_used,
qtrx->qt_rtbcount_delta);
/*
* Adjust the inode reservation.
*/
ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
xfs_apply_quota_reservation_deltas(&dqp->q_ino,
qtrx->qt_ino_res,
qtrx->qt_ino_res_used,
qtrx->qt_icount_delta);
ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
}
}
}
/*
* Release the reservations, and adjust the dquots accordingly.
* This is called only when the transaction is being aborted. If by
* any chance we have done dquot modifications incore (ie. deltas) already,
* we simply throw those away, since that's the expected behavior
* when a transaction is curtailed without a commit.
*/
void
xfs_trans_unreserve_and_mod_dquots(
struct xfs_trans *tp)
{
int i, j;
struct xfs_dquot *dqp;
struct xfs_dqtrx *qtrx, *qa;
bool locked;
if (!tp->t_dqinfo)
return;
for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
qa = tp->t_dqinfo->dqs[j];
for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
qtrx = &qa[i];
/*
* We assume that the array of dquots is filled
* sequentially, not sparsely.
*/
if ((dqp = qtrx->qt_dquot) == NULL)
break;
/*
* Unreserve the original reservation. We don't care
* about the number of blocks used field, or deltas.
* Also we don't bother to zero the fields.
*/
locked = false;
if (qtrx->qt_blk_res) {
xfs_dqlock(dqp);
locked = true;
dqp->q_blk.reserved -=
(xfs_qcnt_t)qtrx->qt_blk_res;
}
if (qtrx->qt_ino_res) {
if (!locked) {
xfs_dqlock(dqp);
locked = true;
}
dqp->q_ino.reserved -=
(xfs_qcnt_t)qtrx->qt_ino_res;
}
if (qtrx->qt_rtblk_res) {
if (!locked) {
xfs_dqlock(dqp);
locked = true;
}
dqp->q_rtb.reserved -=
(xfs_qcnt_t)qtrx->qt_rtblk_res;
}
if (locked)
xfs_dqunlock(dqp);
}
}
}
STATIC void
xfs_quota_warn(
struct xfs_mount *mp,
struct xfs_dquot *dqp,
int type)
{
enum quota_type qtype;
switch (xfs_dquot_type(dqp)) {
case XFS_DQTYPE_PROJ:
qtype = PRJQUOTA;
break;
case XFS_DQTYPE_USER:
qtype = USRQUOTA;
break;
case XFS_DQTYPE_GROUP:
qtype = GRPQUOTA;
break;
default:
return;
}
quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
mp->m_super->s_dev, type);
}
/*
* Decide if we can make an additional reservation against a quota resource.
* Returns an inode QUOTA_NL_ warning code and whether or not it's fatal.
*
* Note that we assume that the numeric difference between the inode and block
* warning codes will always be 3 since it's userspace ABI now, and will never
* decrease the quota reservation, so the *BELOW messages are irrelevant.
*/
static inline int
xfs_dqresv_check(
struct xfs_dquot_res *res,
struct xfs_quota_limits *qlim,
int64_t delta,
bool *fatal)
{
xfs_qcnt_t hardlimit = res->hardlimit;
xfs_qcnt_t softlimit = res->softlimit;
xfs_qcnt_t total_count = res->reserved + delta;
BUILD_BUG_ON(QUOTA_NL_BHARDWARN != QUOTA_NL_IHARDWARN + 3);
BUILD_BUG_ON(QUOTA_NL_BSOFTLONGWARN != QUOTA_NL_ISOFTLONGWARN + 3);
BUILD_BUG_ON(QUOTA_NL_BSOFTWARN != QUOTA_NL_ISOFTWARN + 3);
*fatal = false;
if (delta <= 0)
return QUOTA_NL_NOWARN;
if (!hardlimit)
hardlimit = qlim->hard;
if (!softlimit)
softlimit = qlim->soft;
if (hardlimit && total_count > hardlimit) {
*fatal = true;
return QUOTA_NL_IHARDWARN;
}
if (softlimit && total_count > softlimit) {
time64_t now = ktime_get_real_seconds();
if ((res->timer != 0 && now > res->timer) ||
(res->warnings != 0 && res->warnings >= qlim->warn)) {
*fatal = true;
return QUOTA_NL_ISOFTLONGWARN;
}
res->warnings++;
return QUOTA_NL_ISOFTWARN;
}
return QUOTA_NL_NOWARN;
}
/*
* This reserves disk blocks and inodes against a dquot.
* Flags indicate if the dquot is to be locked here and also
* if the blk reservation is for RT or regular blocks.
* Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
*/
STATIC int
xfs_trans_dqresv(
struct xfs_trans *tp,
struct xfs_mount *mp,
struct xfs_dquot *dqp,
int64_t nblks,
long ninos,
uint flags)
{
struct xfs_quotainfo *q = mp->m_quotainfo;
struct xfs_def_quota *defq;
struct xfs_dquot_res *blkres;
struct xfs_quota_limits *qlim;
xfs_dqlock(dqp);
defq = xfs_get_defquota(q, xfs_dquot_type(dqp));
if (flags & XFS_TRANS_DQ_RES_BLKS) {
blkres = &dqp->q_blk;
qlim = &defq->blk;
} else {
blkres = &dqp->q_rtb;
qlim = &defq->rtb;
}
if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
xfs_dquot_is_enforced(dqp)) {
int quota_nl;
bool fatal;
/*
* dquot is locked already. See if we'd go over the hardlimit
* or exceed the timelimit if we'd reserve resources.
*/
quota_nl = xfs_dqresv_check(blkres, qlim, nblks, &fatal);
if (quota_nl != QUOTA_NL_NOWARN) {
/*
* Quota block warning codes are 3 more than the inode
* codes, which we check above.
*/
xfs_quota_warn(mp, dqp, quota_nl + 3);
if (fatal)
goto error_return;
}
quota_nl = xfs_dqresv_check(&dqp->q_ino, &defq->ino, ninos,
&fatal);
if (quota_nl != QUOTA_NL_NOWARN) {
xfs_quota_warn(mp, dqp, quota_nl);
if (fatal)
goto error_return;
}
}
/*
* Change the reservation, but not the actual usage.
* Note that q_blk.reserved = q_blk.count + resv
*/
blkres->reserved += (xfs_qcnt_t)nblks;
dqp->q_ino.reserved += (xfs_qcnt_t)ninos;
/*
* note the reservation amt in the trans struct too,
* so that the transaction knows how much was reserved by
* it against this particular dquot.
* We don't do this when we are reserving for a delayed allocation,
* because we don't have the luxury of a transaction envelope then.
*/
if (tp) {
ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
xfs_trans_mod_dquot(tp, dqp, flags & XFS_QMOPT_RESBLK_MASK,
nblks);
xfs_trans_mod_dquot(tp, dqp, XFS_TRANS_DQ_RES_INOS, ninos);
}
ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count);
ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count);
ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count);
xfs_dqunlock(dqp);
return 0;
error_return:
xfs_dqunlock(dqp);
if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
return -ENOSPC;
return -EDQUOT;
}
/*
* Given dquot(s), make disk block and/or inode reservations against them.
* The fact that this does the reservation against user, group and
* project quotas is important, because this follows a all-or-nothing
* approach.
*
* flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
* XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT. Used by pquota.
* XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
* XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
* dquots are unlocked on return, if they were not locked by caller.
*/
int
xfs_trans_reserve_quota_bydquots(
struct xfs_trans *tp,
struct xfs_mount *mp,
struct xfs_dquot *udqp,
struct xfs_dquot *gdqp,
struct xfs_dquot *pdqp,
int64_t nblks,
long ninos,
uint flags)
{
int error;
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
return 0;
ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
if (udqp) {
error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos, flags);
if (error)
return error;
}
if (gdqp) {
error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
if (error)
goto unwind_usr;
}
if (pdqp) {
error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
if (error)
goto unwind_grp;
}
/*
* Didn't change anything critical, so, no need to log
*/
return 0;
unwind_grp:
flags |= XFS_QMOPT_FORCE_RES;
if (gdqp)
xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
unwind_usr:
flags |= XFS_QMOPT_FORCE_RES;
if (udqp)
xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
return error;
}
/*
* Lock the dquot and change the reservation if we can.
* This doesn't change the actual usage, just the reservation.
* The inode sent in is locked.
*/
int
xfs_trans_reserve_quota_nblks(
struct xfs_trans *tp,
struct xfs_inode *ip,
int64_t nblks,
long ninos,
uint flags)
{
struct xfs_mount *mp = ip->i_mount;
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
return 0;
ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT((flags & ~(XFS_QMOPT_FORCE_RES)) == XFS_TRANS_DQ_RES_RTBLKS ||
(flags & ~(XFS_QMOPT_FORCE_RES)) == XFS_TRANS_DQ_RES_BLKS);
/*
* Reserve nblks against these dquots, with trans as the mediator.
*/
return xfs_trans_reserve_quota_bydquots(tp, mp,
ip->i_udquot, ip->i_gdquot,
ip->i_pdquot,
nblks, ninos, flags);
}
/*
* This routine is called to allocate a quotaoff log item.
*/
struct xfs_qoff_logitem *
xfs_trans_get_qoff_item(
struct xfs_trans *tp,
struct xfs_qoff_logitem *startqoff,
uint flags)
{
struct xfs_qoff_logitem *q;
ASSERT(tp != NULL);
q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
ASSERT(q != NULL);
/*
* Get a log_item_desc to point at the new item.
*/
xfs_trans_add_item(tp, &q->qql_item);
return q;
}
/*
* This is called to mark the quotaoff logitem as needing
* to be logged when the transaction is committed. The logitem must
* already be associated with the given transaction.
*/
void
xfs_trans_log_quotaoff_item(
struct xfs_trans *tp,
struct xfs_qoff_logitem *qlp)
{
tp->t_flags |= XFS_TRANS_DIRTY;
set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
}
STATIC void
xfs_trans_alloc_dqinfo(
xfs_trans_t *tp)
{
tp->t_dqinfo = kmem_cache_zalloc(xfs_qm_dqtrxzone,
GFP_KERNEL | __GFP_NOFAIL);
}
void
xfs_trans_free_dqinfo(
xfs_trans_t *tp)
{
if (!tp->t_dqinfo)
return;
kmem_cache_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
tp->t_dqinfo = NULL;
}