diff options
author | Darrick J. Wong <darrick.wong@oracle.com> | 2020-07-14 20:37:34 +0300 |
---|---|---|
committer | Darrick J. Wong <darrick.wong@oracle.com> | 2020-07-29 06:24:14 +0300 |
commit | 292b47b4fcfad2b8b2bc749d68c8baa63fc8bf36 (patch) | |
tree | afe206a198abc4146de93905413197dd38fcba05 /fs | |
parent | d1520deab039ca1bac50c53b941a3df3b3a680de (diff) | |
download | linux-292b47b4fcfad2b8b2bc749d68c8baa63fc8bf36.tar.xz |
xfs: refactor xfs_trans_dqresv
Now that we've refactored the resource usage and limits into
per-resource structures, we can refactor some of the open-coded
reservation limit checking in xfs_trans_dqresv.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/xfs/xfs_trans_dquot.c | 155 |
1 files changed, 79 insertions, 76 deletions
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c index 6f0bfd522116..9dc8dd9f852c 100644 --- a/fs/xfs/xfs_trans_dquot.c +++ b/fs/xfs/xfs_trans_dquot.c @@ -555,6 +555,58 @@ xfs_quota_warn( } /* + * 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; + } + + 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. @@ -569,99 +621,51 @@ xfs_trans_dqresv( long ninos, uint flags) { - xfs_qcnt_t hardlimit; - xfs_qcnt_t softlimit; - time64_t timer; - xfs_qwarncnt_t warns; - xfs_qwarncnt_t warnlimit; - xfs_qcnt_t total_count; - xfs_qcnt_t *resbcountp; 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) { - hardlimit = dqp->q_blk.hardlimit; - if (!hardlimit) - hardlimit = defq->blk.hard; - softlimit = dqp->q_blk.softlimit; - if (!softlimit) - softlimit = defq->blk.soft; - timer = dqp->q_blk.timer; - warns = dqp->q_blk.warnings; - warnlimit = defq->blk.warn; - resbcountp = &dqp->q_blk.reserved; + blkres = &dqp->q_blk; + qlim = &defq->blk; } else { - ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS); - hardlimit = dqp->q_rtb.hardlimit; - if (!hardlimit) - hardlimit = defq->rtb.hard; - softlimit = dqp->q_rtb.softlimit; - if (!softlimit) - softlimit = defq->rtb.soft; - timer = dqp->q_rtb.timer; - warns = dqp->q_rtb.warnings; - warnlimit = defq->rtb.warn; - resbcountp = &dqp->q_rtb.reserved; + blkres = &dqp->q_rtb; + qlim = &defq->rtb; } if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id && ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) || (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) || (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) { - if (nblks > 0) { + 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) { /* - * dquot is locked already. See if we'd go over the - * hardlimit or exceed the timelimit if we allocate - * nblks. + * Quota block warning codes are 3 more than the inode + * codes, which we check above. */ - total_count = *resbcountp + nblks; - if (hardlimit && total_count > hardlimit) { - xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN); + xfs_quota_warn(mp, dqp, quota_nl + 3); + if (fatal) goto error_return; - } - if (softlimit && total_count > softlimit) { - if ((timer != 0 && - ktime_get_real_seconds() > timer) || - (warns != 0 && warns >= warnlimit)) { - xfs_quota_warn(mp, dqp, - QUOTA_NL_BSOFTLONGWARN); - goto error_return; - } - - xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN); - } } - if (ninos > 0) { - total_count = dqp->q_ino.reserved + ninos; - timer = dqp->q_ino.timer; - warns = dqp->q_ino.warnings; - warnlimit = defq->ino.warn; - hardlimit = dqp->q_ino.hardlimit; - if (!hardlimit) - hardlimit = defq->ino.hard; - softlimit = dqp->q_ino.softlimit; - if (!softlimit) - softlimit = defq->ino.soft; - - if (hardlimit && total_count > hardlimit) { - xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN); + + 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; - } - if (softlimit && total_count > softlimit) { - if ((timer != 0 && - ktime_get_real_seconds() > timer) || - (warns != 0 && warns >= warnlimit)) { - xfs_quota_warn(mp, dqp, - QUOTA_NL_ISOFTLONGWARN); - goto error_return; - } - xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN); - } } } @@ -669,9 +673,8 @@ xfs_trans_dqresv( * Change the reservation, but not the actual usage. * Note that q_blk.reserved = q_blk.count + resv */ - (*resbcountp) += (xfs_qcnt_t)nblks; - if (ninos != 0) - dqp->q_ino.reserved += (xfs_qcnt_t)ninos; + blkres->reserved += (xfs_qcnt_t)nblks; + dqp->q_ino.reserved += (xfs_qcnt_t)ninos; /* * note the reservation amt in the trans struct too, |