xfs_dquot.rar_Hold

/* * Copyright (c) 2000-2003 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_format.h" #include "xfs_log_format.h" #include "xfs_shared.h" #include "xfs_trans_resv.h" #include "xfs_bit.h" #include "xfs_mount.h" #include "xfs_inode.h" #include "xfs_bmap.h" #include "xfs_bmap_util.h" #include "xfs_alloc.h" #include "xfs_quota.h" #include "xfs_error.h" #include "xfs_trans.h" #include "xfs_buf_item.h" #include "xfs_trans_space.h" #include "xfs_trans_priv.h" #include "xfs_qm.h" #include "xfs_cksum.h" #include "xfs_trace.h" #include "xfs_log.h" #include "xfs_bmap_btree.h" /* * Lock order: * * ip->i_lock * qi->qi_tree_lock * dquot->q_qlock (xfs_dqlock() and friends) * dquot->q_flush (xfs_dqflock() and friends) * qi->qi_lru_lock * * If two dquots need to be locked the order is user before group/project, * otherwise by the lowest id first, see xfs_dqlock2. */ #ifdef DEBUG xfs_buftarg_t *xfs_dqerror_target; int xfs_do_dqerror; int xfs_dqreq_num; int xfs_dqerror_mod = 33; #endif struct kmem_zone *xfs_qm_dqtrxzone; static struct kmem_zone *xfs_qm_dqzone; static struct lock_class_key xfs_dquot_group_class; static struct lock_class_key xfs_dquot_project_class; /* * This is called to free all the memory associated with a dquot */ void xfs_qm_dqdestroy( xfs_dquot_t *dqp) { ASSERT(list_empty(&dqp->q_lru)); mutex_destroy(&dqp->q_qlock); kmem_zone_free(xfs_qm_dqzone, dqp); XFS_STATS_DEC(xs_qm_dquot); } /* * If default limits are in force, push them into the dquot now. * We overwrite the dquot limits only if they are zero and this * is not the root dquot. */ void xfs_qm_adjust_dqlimits( struct xfs_mount *mp, struct xfs_dquot *dq) { struct xfs_quotainfo *q = mp->m_quotainfo; struct xfs_disk_dquot *d = &dq->q_core; int prealloc = 0; ASSERT(d->d_id); if (q->qi_bsoftlimit && !d->d_blk_softlimit) { d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit); prealloc = 1; } if (q->qi_bhardlimit && !d->d_blk_hardlimit) { d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit); prealloc = 1; } if (q->qi_isoftlimit && !d->d_ino_softlimit) d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit); if (q->qi_ihardlimit && !d->d_ino_hardlimit) d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit); if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit) d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit); if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit) d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit); if (prealloc) xfs_dquot_set_prealloc_limits(dq); } /* * Check the limits and timers of a dquot and start or reset timers * if necessary. * This gets called even when quota enforcement is OFF, which makes our * life a little less complicated. (We just don't reject any quota * reservations in that case, when enforcement is off). * We also return 0 as the values of the timers in Q_GETQUOTA calls, when * enforcement's off. * In contrast, warnings are a little different in that they don't * 'automatically' get started when limits get exceeded. They do * get reset to zero, however, when we find the count to be under * the soft limit (they are only ever set non-zero via userspace). */ void xfs_qm_adjust_dqtimers( xfs_mount_t *mp, xfs_disk_dquot_t *d) { ASSERT(d->d_id); #ifdef DEBUG if (d->d_blk_hardlimit) ASSERT(be64_to_cpu(d->d_blk_softlimit) <= be64_to_cpu(d->d_blk_hardlimit)); if (d->d_ino_hardlimit) ASSERT(be64_to_cpu(d->d_ino_softlimit) <= be64_to_cpu(d->d_ino_hardlimit)); if (d->d_rtb_hardlimit) ASSERT(be64_to_cpu(d->d_rtb_softlimit) <= be64_to_cpu(d->d_rtb_hardlimit)); #endif if (!d->d_btimer) { if ((d->d_blk_softlimit && (be64_to_cpu(d->d_bcount) > be64_to_cpu(d->d_blk_softlimit))) || (d->d_blk_hardlimit && (be64_to_cpu(d->d_bcount) > be64_to_cpu(d->d_blk_hardlimit)))) { d->d_btimer = cpu_to_be32(get_seconds() + mp->m_quotainfo->qi_btimelimit); } else { d->d_bwarns = 0; } } else { if ((!d->d_blk_softlimit || (be64_to_cpu(d->d_bcount) <= be64_to_cpu(d->d_blk_softlimit))) && (!d->d_blk_hardlimit || (be64_to_cpu(d->d_bcount) <= be64_to_cpu(d->d_blk_hardlimit)))) { d->d_btimer = 0; } } if (!d->d_itimer) { if ((d->d_ino_softlimit && (be64_to_cpu(d->d_icount) > be64_to_cpu(d->d_ino_softlimit))) || (d->d_ino_hardlimit && (be64_to_cpu(d->d_icount) > be64_to_cpu(d->d_ino_hardlimit)))) { d->d_itimer = cpu_to_be32(get_seconds() + mp->m_quotainfo->qi_itimelimit); } else { d->d_iwarns = 0; } } else { if ((!d->d_ino_softlimit || (be64_to_cpu(d->d_icount) <= be64_to_cpu(d->d_ino_softlimit))) && (!d->d_ino_hardlimit || (be64_to_cpu(d->d_icount) <= be64_to_cpu(d->d_ino_hardlimit)))) { d->d_itimer = 0; } } if (!d->d_rtbtimer) { if ((d->d_rtb_softlimit && (be64_to_cpu(d->d_rtbcount) > be64_to_cpu(d->d_rtb_softlimit))) || (d->d_rtb_hardlimit && (be64_to_cpu(d->d_rtbcount) > be64_to_cpu(d->d_rtb_hardlimit)))) { d->d_rtbtimer = cpu_to_be32(get_seconds() + mp->m_quotainfo->qi_rtbtimelimit); } else { d->d_rtbwarns = 0; } } else { if ((!d->d_rtb_softlimit || (be64_to_cpu(d->d_rtbcount) <= be64_to_cpu(d->d_rtb_softlimit))) && (!d->d_rtb_hardlimit || (be64_to_cpu(d->d_rtbcount) <= be64_to_cpu(d->d_rtb_hardlimit)))) { d->d_rtbtimer = 0; } } } /* * initialize a buffer full of dquots and log the whole thing */ STATIC void xfs_qm_init_dquot_blk( xfs_trans_t *tp, xfs_mount_t *mp, xfs_dqid_t id, uint type, xfs_buf_t *bp) { struct xfs_quotainfo *q = mp->m_quotainfo; xfs_dqblk_t *d; int curid, i; ASSERT(tp); ASSERT(xfs_buf_islocked(bp)); d = bp->b_addr; /* * ID of the first dquot in the block - id's are zero based. */ curid = id - (id % q->qi_dqperchunk); ASSERT(curid >= 0); memset(d, 0, BBTOB(q->qi_dqchunklen)); for (i = 0; i < q->qi_dqperchunk; i++, d++, curid++) { d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC); d->dd_diskdq.d_version = XFS_DQUOT_VERSION; d->dd_diskdq.d_id = cpu_to_be32(curid); d->dd_diskdq.d_flags = type; if (xfs_sb_version_hascrc(&mp->m_sb)) { uuid_copy(&d->dd_uuid, &mp->m_sb.sb_uuid); xfs_update_cksum((char *)d, sizeof(struct xfs_dqblk), XFS_DQUOT_CRC_OFF); } } xfs_trans_dquot_buf(tp, bp, (type & XFS_DQ_USER ? XFS_BLF_UDQUOT_BUF : ((type & XFS_DQ_PROJ) ? XFS_BLF_PDQUOT_BUF : XFS_BLF_GDQUOT_BUF))); xfs_trans_log_buf(tp, bp, 0, BBTOB(q->qi_dqchunklen) - 1); } /* * Initialize the dynamic speculative preallocation thresholds. The lo/hi * watermarks correspond to the soft and hard limits by default. If a soft limit * is not specified, we use 95% of the hard limit. */ void xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp) { __uint64_t space; dqp->q_prealloc_hi_wmark = be64_to_cpu(dqp->q_core.d_blk_hardlimit); dqp->q_prealloc_lo_wmark = be64_to_cpu(dqp->q_core.d_blk_softlimit); if (!dqp->q_prealloc_lo_wmark) { dqp->q_prealloc_lo_wmark = dqp->q_prealloc_hi_wmark; do_div(dqp->q_prealloc_lo_wmark, 100); dqp->q_prealloc_lo_wmark *= 95; } space = dqp->q_prealloc_hi_wmark; do_div(space, 100); dqp->q_low_space[XFS_Q