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- // 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"
- #include "xfs_error.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_has_bigtime(tp->t_mountp) &&
- !(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_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_ON(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) {
- *fatal = true;
- return QUOTA_NL_ISOFTLONGWARN;
- }
- 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);
- }
- if (XFS_IS_CORRUPT(mp, dqp->q_blk.reserved < dqp->q_blk.count) ||
- XFS_IS_CORRUPT(mp, dqp->q_rtb.reserved < dqp->q_rtb.count) ||
- XFS_IS_CORRUPT(mp, dqp->q_ino.reserved < dqp->q_ino.count))
- goto error_corrupt;
- xfs_dqunlock(dqp);
- return 0;
- error_return:
- xfs_dqunlock(dqp);
- if (xfs_dquot_type(dqp) == XFS_DQTYPE_PROJ)
- return -ENOSPC;
- return -EDQUOT;
- error_corrupt:
- xfs_dqunlock(dqp);
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
- return -EFSCORRUPTED;
- }
- /*
- * 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_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 dblocks,
- int64_t rblocks,
- bool force)
- {
- struct xfs_mount *mp = ip->i_mount;
- unsigned int qflags = 0;
- int error;
- if (!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));
- if (force)
- qflags |= XFS_QMOPT_FORCE_RES;
- /* Reserve data device quota against the inode's dquots. */
- error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
- ip->i_gdquot, ip->i_pdquot, dblocks, 0,
- XFS_QMOPT_RES_REGBLKS | qflags);
- if (error)
- return error;
- /* Do the same but for realtime blocks. */
- error = xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
- ip->i_gdquot, ip->i_pdquot, rblocks, 0,
- XFS_QMOPT_RES_RTBLKS | qflags);
- if (error) {
- xfs_trans_reserve_quota_bydquots(tp, mp, ip->i_udquot,
- ip->i_gdquot, ip->i_pdquot, -dblocks, 0,
- XFS_QMOPT_RES_REGBLKS);
- return error;
- }
- return 0;
- }
- /* Change the quota reservations for an inode creation activity. */
- int
- xfs_trans_reserve_quota_icreate(
- struct xfs_trans *tp,
- struct xfs_dquot *udqp,
- struct xfs_dquot *gdqp,
- struct xfs_dquot *pdqp,
- int64_t dblocks)
- {
- struct xfs_mount *mp = tp->t_mountp;
- if (!XFS_IS_QUOTA_ON(mp))
- return 0;
- return xfs_trans_reserve_quota_bydquots(tp, mp, udqp, gdqp, pdqp,
- dblocks, 1, XFS_QMOPT_RES_REGBLKS);
- }
- STATIC void
- xfs_trans_alloc_dqinfo(
- xfs_trans_t *tp)
- {
- tp->t_dqinfo = kmem_cache_zalloc(xfs_dqtrx_cache,
- GFP_KERNEL | __GFP_NOFAIL);
- }
- void
- xfs_trans_free_dqinfo(
- xfs_trans_t *tp)
- {
- if (!tp->t_dqinfo)
- return;
- kmem_cache_free(xfs_dqtrx_cache, tp->t_dqinfo);
- tp->t_dqinfo = NULL;
- }
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