![Nathan Scott](/assets/img/avatar_default.png)
pure bloat. SGI-PV: 952969 SGI-Modid: xfs-linux-melb:xfs-kern:26251a Signed-off-by: Nathan Scott <nathans@sgi.com>
1600 lines
40 KiB
C
1600 lines
40 KiB
C
/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_inum.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_alloc.h"
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#include "xfs_dmapi.h"
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#include "xfs_quota.h"
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#include "xfs_mount.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_alloc_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dir2_sf.h"
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#include "xfs_attr_sf.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_bmap.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_itable.h"
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#include "xfs_rw.h"
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#include "xfs_acl.h"
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#include "xfs_cap.h"
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#include "xfs_mac.h"
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#include "xfs_attr.h"
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#include "xfs_buf_item.h"
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#include "xfs_trans_space.h"
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#include "xfs_trans_priv.h"
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#include "xfs_qm.h"
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/*
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LOCK ORDER
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inode lock (ilock)
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dquot hash-chain lock (hashlock)
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xqm dquot freelist lock (freelistlock
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mount's dquot list lock (mplistlock)
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user dquot lock - lock ordering among dquots is based on the uid or gid
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group dquot lock - similar to udquots. Between the two dquots, the udquot
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has to be locked first.
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pin lock - the dquot lock must be held to take this lock.
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flush lock - ditto.
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*/
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STATIC void xfs_qm_dqflush_done(xfs_buf_t *, xfs_dq_logitem_t *);
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#ifdef DEBUG
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xfs_buftarg_t *xfs_dqerror_target;
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int xfs_do_dqerror;
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int xfs_dqreq_num;
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int xfs_dqerror_mod = 33;
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#endif
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/*
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* Allocate and initialize a dquot. We don't always allocate fresh memory;
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* we try to reclaim a free dquot if the number of incore dquots are above
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* a threshold.
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* The only field inside the core that gets initialized at this point
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* is the d_id field. The idea is to fill in the entire q_core
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* when we read in the on disk dquot.
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*/
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STATIC xfs_dquot_t *
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xfs_qm_dqinit(
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xfs_mount_t *mp,
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xfs_dqid_t id,
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uint type)
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{
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xfs_dquot_t *dqp;
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boolean_t brandnewdquot;
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brandnewdquot = xfs_qm_dqalloc_incore(&dqp);
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dqp->dq_flags = type;
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dqp->q_core.d_id = cpu_to_be32(id);
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dqp->q_mount = mp;
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/*
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* No need to re-initialize these if this is a reclaimed dquot.
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*/
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if (brandnewdquot) {
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dqp->dq_flnext = dqp->dq_flprev = dqp;
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mutex_init(&dqp->q_qlock);
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initnsema(&dqp->q_flock, 1, "fdq");
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sv_init(&dqp->q_pinwait, SV_DEFAULT, "pdq");
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#ifdef XFS_DQUOT_TRACE
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dqp->q_trace = ktrace_alloc(DQUOT_TRACE_SIZE, KM_SLEEP);
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xfs_dqtrace_entry(dqp, "DQINIT");
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#endif
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} else {
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/*
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* Only the q_core portion was zeroed in dqreclaim_one().
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* So, we need to reset others.
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*/
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dqp->q_nrefs = 0;
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dqp->q_blkno = 0;
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dqp->MPL_NEXT = dqp->HL_NEXT = NULL;
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dqp->HL_PREVP = dqp->MPL_PREVP = NULL;
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dqp->q_bufoffset = 0;
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dqp->q_fileoffset = 0;
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dqp->q_transp = NULL;
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dqp->q_gdquot = NULL;
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dqp->q_res_bcount = 0;
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dqp->q_res_icount = 0;
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dqp->q_res_rtbcount = 0;
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dqp->q_pincount = 0;
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dqp->q_hash = NULL;
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ASSERT(dqp->dq_flnext == dqp->dq_flprev);
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#ifdef XFS_DQUOT_TRACE
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ASSERT(dqp->q_trace);
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xfs_dqtrace_entry(dqp, "DQRECLAIMED_INIT");
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#endif
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}
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/*
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* log item gets initialized later
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*/
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return (dqp);
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}
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/*
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* This is called to free all the memory associated with a dquot
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*/
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void
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xfs_qm_dqdestroy(
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xfs_dquot_t *dqp)
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{
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ASSERT(! XFS_DQ_IS_ON_FREELIST(dqp));
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mutex_destroy(&dqp->q_qlock);
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freesema(&dqp->q_flock);
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sv_destroy(&dqp->q_pinwait);
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#ifdef XFS_DQUOT_TRACE
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if (dqp->q_trace)
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ktrace_free(dqp->q_trace);
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dqp->q_trace = NULL;
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#endif
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kmem_zone_free(xfs_Gqm->qm_dqzone, dqp);
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atomic_dec(&xfs_Gqm->qm_totaldquots);
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}
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/*
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* This is what a 'fresh' dquot inside a dquot chunk looks like on disk.
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*/
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STATIC void
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xfs_qm_dqinit_core(
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xfs_dqid_t id,
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uint type,
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xfs_dqblk_t *d)
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{
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/*
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* Caller has zero'd the entire dquot 'chunk' already.
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*/
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d->dd_diskdq.d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
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d->dd_diskdq.d_version = XFS_DQUOT_VERSION;
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d->dd_diskdq.d_id = cpu_to_be32(id);
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d->dd_diskdq.d_flags = type;
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}
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#ifdef XFS_DQUOT_TRACE
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/*
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* Dquot tracing for debugging.
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*/
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/* ARGSUSED */
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void
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__xfs_dqtrace_entry(
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xfs_dquot_t *dqp,
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char *func,
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void *retaddr,
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xfs_inode_t *ip)
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{
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xfs_dquot_t *udqp = NULL;
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xfs_ino_t ino = 0;
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ASSERT(dqp->q_trace);
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if (ip) {
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ino = ip->i_ino;
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udqp = ip->i_udquot;
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}
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ktrace_enter(dqp->q_trace,
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(void *)(__psint_t)DQUOT_KTRACE_ENTRY,
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(void *)func,
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(void *)(__psint_t)dqp->q_nrefs,
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(void *)(__psint_t)dqp->dq_flags,
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(void *)(__psint_t)dqp->q_res_bcount,
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_bcount),
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_icount),
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_blk_hardlimit),
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_blk_softlimit),
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_ino_hardlimit),
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(void *)(__psint_t)be64_to_cpu(dqp->q_core.d_ino_softlimit),
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(void *)(__psint_t)be32_to_cpu(dqp->q_core.d_id),
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(void *)(__psint_t)current_pid(),
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(void *)(__psint_t)ino,
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(void *)(__psint_t)retaddr,
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(void *)(__psint_t)udqp);
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return;
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}
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#endif
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/*
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* If default limits are in force, push them into the dquot now.
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* We overwrite the dquot limits only if they are zero and this
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* is not the root dquot.
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*/
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void
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xfs_qm_adjust_dqlimits(
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xfs_mount_t *mp,
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xfs_disk_dquot_t *d)
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{
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xfs_quotainfo_t *q = mp->m_quotainfo;
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ASSERT(d->d_id);
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if (q->qi_bsoftlimit && !d->d_blk_softlimit)
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d->d_blk_softlimit = cpu_to_be64(q->qi_bsoftlimit);
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if (q->qi_bhardlimit && !d->d_blk_hardlimit)
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d->d_blk_hardlimit = cpu_to_be64(q->qi_bhardlimit);
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if (q->qi_isoftlimit && !d->d_ino_softlimit)
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d->d_ino_softlimit = cpu_to_be64(q->qi_isoftlimit);
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if (q->qi_ihardlimit && !d->d_ino_hardlimit)
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d->d_ino_hardlimit = cpu_to_be64(q->qi_ihardlimit);
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if (q->qi_rtbsoftlimit && !d->d_rtb_softlimit)
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d->d_rtb_softlimit = cpu_to_be64(q->qi_rtbsoftlimit);
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if (q->qi_rtbhardlimit && !d->d_rtb_hardlimit)
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d->d_rtb_hardlimit = cpu_to_be64(q->qi_rtbhardlimit);
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}
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/*
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* Check the limits and timers of a dquot and start or reset timers
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* if necessary.
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* This gets called even when quota enforcement is OFF, which makes our
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* life a little less complicated. (We just don't reject any quota
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* reservations in that case, when enforcement is off).
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* We also return 0 as the values of the timers in Q_GETQUOTA calls, when
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* enforcement's off.
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* In contrast, warnings are a little different in that they don't
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* 'automatically' get started when limits get exceeded. They do
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* get reset to zero, however, when we find the count to be under
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* the soft limit (they are only ever set non-zero via userspace).
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*/
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void
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xfs_qm_adjust_dqtimers(
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xfs_mount_t *mp,
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xfs_disk_dquot_t *d)
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{
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ASSERT(d->d_id);
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#ifdef QUOTADEBUG
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if (d->d_blk_hardlimit)
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ASSERT(be64_to_cpu(d->d_blk_softlimit) <=
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be64_to_cpu(d->d_blk_hardlimit));
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if (d->d_ino_hardlimit)
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ASSERT(be64_to_cpu(d->d_ino_softlimit) <=
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be64_to_cpu(d->d_ino_hardlimit));
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if (d->d_rtb_hardlimit)
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ASSERT(be64_to_cpu(d->d_rtb_softlimit) <=
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be64_to_cpu(d->d_rtb_hardlimit));
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#endif
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if (!d->d_btimer) {
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if ((d->d_blk_softlimit &&
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(be64_to_cpu(d->d_bcount) >=
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be64_to_cpu(d->d_blk_softlimit))) ||
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(d->d_blk_hardlimit &&
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(be64_to_cpu(d->d_bcount) >=
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be64_to_cpu(d->d_blk_hardlimit)))) {
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d->d_btimer = cpu_to_be32(get_seconds() +
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XFS_QI_BTIMELIMIT(mp));
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} else {
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d->d_bwarns = 0;
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}
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} else {
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if ((!d->d_blk_softlimit ||
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(be64_to_cpu(d->d_bcount) <
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be64_to_cpu(d->d_blk_softlimit))) &&
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(!d->d_blk_hardlimit ||
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(be64_to_cpu(d->d_bcount) <
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be64_to_cpu(d->d_blk_hardlimit)))) {
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d->d_btimer = 0;
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}
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}
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if (!d->d_itimer) {
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if ((d->d_ino_softlimit &&
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(be64_to_cpu(d->d_icount) >=
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be64_to_cpu(d->d_ino_softlimit))) ||
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(d->d_ino_hardlimit &&
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(be64_to_cpu(d->d_icount) >=
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be64_to_cpu(d->d_ino_hardlimit)))) {
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d->d_itimer = cpu_to_be32(get_seconds() +
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XFS_QI_ITIMELIMIT(mp));
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} else {
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d->d_iwarns = 0;
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}
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} else {
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if ((!d->d_ino_softlimit ||
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(be64_to_cpu(d->d_icount) <
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be64_to_cpu(d->d_ino_softlimit))) &&
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(!d->d_ino_hardlimit ||
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(be64_to_cpu(d->d_icount) <
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be64_to_cpu(d->d_ino_hardlimit)))) {
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d->d_itimer = 0;
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}
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}
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if (!d->d_rtbtimer) {
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if ((d->d_rtb_softlimit &&
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(be64_to_cpu(d->d_rtbcount) >=
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be64_to_cpu(d->d_rtb_softlimit))) ||
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(d->d_rtb_hardlimit &&
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(be64_to_cpu(d->d_rtbcount) >=
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be64_to_cpu(d->d_rtb_hardlimit)))) {
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d->d_rtbtimer = cpu_to_be32(get_seconds() +
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XFS_QI_RTBTIMELIMIT(mp));
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} else {
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d->d_rtbwarns = 0;
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}
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} else {
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if ((!d->d_rtb_softlimit ||
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(be64_to_cpu(d->d_rtbcount) <
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be64_to_cpu(d->d_rtb_softlimit))) &&
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(!d->d_rtb_hardlimit ||
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(be64_to_cpu(d->d_rtbcount) <
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be64_to_cpu(d->d_rtb_hardlimit)))) {
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d->d_rtbtimer = 0;
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}
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}
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}
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/*
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* initialize a buffer full of dquots and log the whole thing
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*/
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STATIC void
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xfs_qm_init_dquot_blk(
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xfs_trans_t *tp,
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xfs_mount_t *mp,
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xfs_dqid_t id,
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uint type,
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xfs_buf_t *bp)
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{
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xfs_dqblk_t *d;
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int curid, i;
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ASSERT(tp);
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ASSERT(XFS_BUF_ISBUSY(bp));
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ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
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d = (xfs_dqblk_t *)XFS_BUF_PTR(bp);
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/*
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* ID of the first dquot in the block - id's are zero based.
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*/
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curid = id - (id % XFS_QM_DQPERBLK(mp));
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ASSERT(curid >= 0);
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memset(d, 0, BBTOB(XFS_QI_DQCHUNKLEN(mp)));
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for (i = 0; i < XFS_QM_DQPERBLK(mp); i++, d++, curid++)
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xfs_qm_dqinit_core(curid, type, d);
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xfs_trans_dquot_buf(tp, bp,
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(type & XFS_DQ_USER ? XFS_BLI_UDQUOT_BUF :
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((type & XFS_DQ_PROJ) ? XFS_BLI_PDQUOT_BUF :
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XFS_BLI_GDQUOT_BUF)));
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xfs_trans_log_buf(tp, bp, 0, BBTOB(XFS_QI_DQCHUNKLEN(mp)) - 1);
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}
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/*
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* Allocate a block and fill it with dquots.
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* This is called when the bmapi finds a hole.
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*/
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STATIC int
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xfs_qm_dqalloc(
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xfs_trans_t **tpp,
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xfs_mount_t *mp,
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xfs_dquot_t *dqp,
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xfs_inode_t *quotip,
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xfs_fileoff_t offset_fsb,
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xfs_buf_t **O_bpp)
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{
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xfs_fsblock_t firstblock;
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xfs_bmap_free_t flist;
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xfs_bmbt_irec_t map;
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int nmaps, error, committed;
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xfs_buf_t *bp;
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xfs_trans_t *tp = *tpp;
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ASSERT(tp != NULL);
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xfs_dqtrace_entry(dqp, "DQALLOC");
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/*
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* Initialize the bmap freelist prior to calling bmapi code.
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*/
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XFS_BMAP_INIT(&flist, &firstblock);
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xfs_ilock(quotip, XFS_ILOCK_EXCL);
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/*
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* Return if this type of quotas is turned off while we didn't
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* have an inode lock
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*/
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if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
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xfs_iunlock(quotip, XFS_ILOCK_EXCL);
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return (ESRCH);
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}
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/*
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* xfs_trans_commit normally decrements the vnode ref count
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* when it unlocks the inode. Since we want to keep the quota
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* inode around, we bump the vnode ref count now.
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*/
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VN_HOLD(XFS_ITOV(quotip));
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xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL);
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nmaps = 1;
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if ((error = xfs_bmapi(tp, quotip,
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offset_fsb, XFS_DQUOT_CLUSTER_SIZE_FSB,
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XFS_BMAPI_METADATA | XFS_BMAPI_WRITE,
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&firstblock,
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XFS_QM_DQALLOC_SPACE_RES(mp),
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&map, &nmaps, &flist, NULL))) {
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goto error0;
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}
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ASSERT(map.br_blockcount == XFS_DQUOT_CLUSTER_SIZE_FSB);
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ASSERT(nmaps == 1);
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ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
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(map.br_startblock != HOLESTARTBLOCK));
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/*
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|
* Keep track of the blkno to save a lookup later
|
|
*/
|
|
dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
|
|
|
|
/* now we can just get the buffer (there's nothing to read yet) */
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
|
|
dqp->q_blkno,
|
|
XFS_QI_DQCHUNKLEN(mp),
|
|
0);
|
|
if (!bp || (error = XFS_BUF_GETERROR(bp)))
|
|
goto error1;
|
|
/*
|
|
* Make a chunk of dquots out of this buffer and log
|
|
* the entire thing.
|
|
*/
|
|
xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id),
|
|
dqp->dq_flags & XFS_DQ_ALLTYPES, bp);
|
|
|
|
/*
|
|
* xfs_bmap_finish() may commit the current transaction and
|
|
* start a second transaction if the freelist is not empty.
|
|
*
|
|
* Since we still want to modify this buffer, we need to
|
|
* ensure that the buffer is not released on commit of
|
|
* the first transaction and ensure the buffer is added to the
|
|
* second transaction.
|
|
*
|
|
* If there is only one transaction then don't stop the buffer
|
|
* from being released when it commits later on.
|
|
*/
|
|
|
|
xfs_trans_bhold(tp, bp);
|
|
|
|
if ((error = xfs_bmap_finish(tpp, &flist, firstblock, &committed))) {
|
|
goto error1;
|
|
}
|
|
|
|
if (committed) {
|
|
tp = *tpp;
|
|
xfs_trans_bjoin(tp, bp);
|
|
} else {
|
|
xfs_trans_bhold_release(tp, bp);
|
|
}
|
|
|
|
*O_bpp = bp;
|
|
return 0;
|
|
|
|
error1:
|
|
xfs_bmap_cancel(&flist);
|
|
error0:
|
|
xfs_iunlock(quotip, XFS_ILOCK_EXCL);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Maps a dquot to the buffer containing its on-disk version.
|
|
* This returns a ptr to the buffer containing the on-disk dquot
|
|
* in the bpp param, and a ptr to the on-disk dquot within that buffer
|
|
*/
|
|
STATIC int
|
|
xfs_qm_dqtobp(
|
|
xfs_trans_t **tpp,
|
|
xfs_dquot_t *dqp,
|
|
xfs_disk_dquot_t **O_ddpp,
|
|
xfs_buf_t **O_bpp,
|
|
uint flags)
|
|
{
|
|
xfs_bmbt_irec_t map;
|
|
int nmaps, error;
|
|
xfs_buf_t *bp;
|
|
xfs_inode_t *quotip;
|
|
xfs_mount_t *mp;
|
|
xfs_disk_dquot_t *ddq;
|
|
xfs_dqid_t id;
|
|
boolean_t newdquot;
|
|
xfs_trans_t *tp = (tpp ? *tpp : NULL);
|
|
|
|
mp = dqp->q_mount;
|
|
id = be32_to_cpu(dqp->q_core.d_id);
|
|
nmaps = 1;
|
|
newdquot = B_FALSE;
|
|
|
|
/*
|
|
* If we don't know where the dquot lives, find out.
|
|
*/
|
|
if (dqp->q_blkno == (xfs_daddr_t) 0) {
|
|
/* We use the id as an index */
|
|
dqp->q_fileoffset = (xfs_fileoff_t)id / XFS_QM_DQPERBLK(mp);
|
|
nmaps = 1;
|
|
quotip = XFS_DQ_TO_QIP(dqp);
|
|
xfs_ilock(quotip, XFS_ILOCK_SHARED);
|
|
/*
|
|
* Return if this type of quotas is turned off while we didn't
|
|
* have an inode lock
|
|
*/
|
|
if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
|
|
xfs_iunlock(quotip, XFS_ILOCK_SHARED);
|
|
return (ESRCH);
|
|
}
|
|
/*
|
|
* Find the block map; no allocations yet
|
|
*/
|
|
error = xfs_bmapi(NULL, quotip, dqp->q_fileoffset,
|
|
XFS_DQUOT_CLUSTER_SIZE_FSB,
|
|
XFS_BMAPI_METADATA,
|
|
NULL, 0, &map, &nmaps, NULL, NULL);
|
|
|
|
xfs_iunlock(quotip, XFS_ILOCK_SHARED);
|
|
if (error)
|
|
return (error);
|
|
ASSERT(nmaps == 1);
|
|
ASSERT(map.br_blockcount == 1);
|
|
|
|
/*
|
|
* offset of dquot in the (fixed sized) dquot chunk.
|
|
*/
|
|
dqp->q_bufoffset = (id % XFS_QM_DQPERBLK(mp)) *
|
|
sizeof(xfs_dqblk_t);
|
|
if (map.br_startblock == HOLESTARTBLOCK) {
|
|
/*
|
|
* We don't allocate unless we're asked to
|
|
*/
|
|
if (!(flags & XFS_QMOPT_DQALLOC))
|
|
return (ENOENT);
|
|
|
|
ASSERT(tp);
|
|
if ((error = xfs_qm_dqalloc(tpp, mp, dqp, quotip,
|
|
dqp->q_fileoffset, &bp)))
|
|
return (error);
|
|
tp = *tpp;
|
|
newdquot = B_TRUE;
|
|
} else {
|
|
/*
|
|
* store the blkno etc so that we don't have to do the
|
|
* mapping all the time
|
|
*/
|
|
dqp->q_blkno = XFS_FSB_TO_DADDR(mp, map.br_startblock);
|
|
}
|
|
}
|
|
ASSERT(dqp->q_blkno != DELAYSTARTBLOCK);
|
|
ASSERT(dqp->q_blkno != HOLESTARTBLOCK);
|
|
|
|
/*
|
|
* Read in the buffer, unless we've just done the allocation
|
|
* (in which case we already have the buf).
|
|
*/
|
|
if (! newdquot) {
|
|
xfs_dqtrace_entry(dqp, "DQTOBP READBUF");
|
|
if ((error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp,
|
|
dqp->q_blkno,
|
|
XFS_QI_DQCHUNKLEN(mp),
|
|
0, &bp))) {
|
|
return (error);
|
|
}
|
|
if (error || !bp)
|
|
return XFS_ERROR(error);
|
|
}
|
|
ASSERT(XFS_BUF_ISBUSY(bp));
|
|
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
|
|
|
|
/*
|
|
* calculate the location of the dquot inside the buffer.
|
|
*/
|
|
ddq = (xfs_disk_dquot_t *)((char *)XFS_BUF_PTR(bp) + dqp->q_bufoffset);
|
|
|
|
/*
|
|
* A simple sanity check in case we got a corrupted dquot...
|
|
*/
|
|
if (xfs_qm_dqcheck(ddq, id, dqp->dq_flags & XFS_DQ_ALLTYPES,
|
|
flags & (XFS_QMOPT_DQREPAIR|XFS_QMOPT_DOWARN),
|
|
"dqtobp")) {
|
|
if (!(flags & XFS_QMOPT_DQREPAIR)) {
|
|
xfs_trans_brelse(tp, bp);
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
XFS_BUF_BUSY(bp); /* We dirtied this */
|
|
}
|
|
|
|
*O_bpp = bp;
|
|
*O_ddpp = ddq;
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Read in the ondisk dquot using dqtobp() then copy it to an incore version,
|
|
* and release the buffer immediately.
|
|
*
|
|
*/
|
|
/* ARGSUSED */
|
|
STATIC int
|
|
xfs_qm_dqread(
|
|
xfs_trans_t **tpp,
|
|
xfs_dqid_t id,
|
|
xfs_dquot_t *dqp, /* dquot to get filled in */
|
|
uint flags)
|
|
{
|
|
xfs_disk_dquot_t *ddqp;
|
|
xfs_buf_t *bp;
|
|
int error;
|
|
xfs_trans_t *tp;
|
|
|
|
ASSERT(tpp);
|
|
|
|
/*
|
|
* get a pointer to the on-disk dquot and the buffer containing it
|
|
* dqp already knows its own type (GROUP/USER).
|
|
*/
|
|
xfs_dqtrace_entry(dqp, "DQREAD");
|
|
if ((error = xfs_qm_dqtobp(tpp, dqp, &ddqp, &bp, flags))) {
|
|
return (error);
|
|
}
|
|
tp = *tpp;
|
|
|
|
/* copy everything from disk dquot to the incore dquot */
|
|
memcpy(&dqp->q_core, ddqp, sizeof(xfs_disk_dquot_t));
|
|
ASSERT(be32_to_cpu(dqp->q_core.d_id) == id);
|
|
xfs_qm_dquot_logitem_init(dqp);
|
|
|
|
/*
|
|
* Reservation counters are defined as reservation plus current usage
|
|
* to avoid having to add everytime.
|
|
*/
|
|
dqp->q_res_bcount = be64_to_cpu(ddqp->d_bcount);
|
|
dqp->q_res_icount = be64_to_cpu(ddqp->d_icount);
|
|
dqp->q_res_rtbcount = be64_to_cpu(ddqp->d_rtbcount);
|
|
|
|
/* Mark the buf so that this will stay incore a little longer */
|
|
XFS_BUF_SET_VTYPE_REF(bp, B_FS_DQUOT, XFS_DQUOT_REF);
|
|
|
|
/*
|
|
* We got the buffer with a xfs_trans_read_buf() (in dqtobp())
|
|
* So we need to release with xfs_trans_brelse().
|
|
* The strategy here is identical to that of inodes; we lock
|
|
* the dquot in xfs_qm_dqget() before making it accessible to
|
|
* others. This is because dquots, like inodes, need a good level of
|
|
* concurrency, and we don't want to take locks on the entire buffers
|
|
* for dquot accesses.
|
|
* Note also that the dquot buffer may even be dirty at this point, if
|
|
* this particular dquot was repaired. We still aren't afraid to
|
|
* brelse it because we have the changes incore.
|
|
*/
|
|
ASSERT(XFS_BUF_ISBUSY(bp));
|
|
ASSERT(XFS_BUF_VALUSEMA(bp) <= 0);
|
|
xfs_trans_brelse(tp, bp);
|
|
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* allocate an incore dquot from the kernel heap,
|
|
* and fill its core with quota information kept on disk.
|
|
* If XFS_QMOPT_DQALLOC is set, it'll allocate a dquot on disk
|
|
* if it wasn't already allocated.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_idtodq(
|
|
xfs_mount_t *mp,
|
|
xfs_dqid_t id, /* gid or uid, depending on type */
|
|
uint type, /* UDQUOT or GDQUOT */
|
|
uint flags, /* DQALLOC, DQREPAIR */
|
|
xfs_dquot_t **O_dqpp)/* OUT : incore dquot, not locked */
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
int error;
|
|
xfs_trans_t *tp;
|
|
int cancelflags=0;
|
|
|
|
dqp = xfs_qm_dqinit(mp, id, type);
|
|
tp = NULL;
|
|
if (flags & XFS_QMOPT_DQALLOC) {
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_DQALLOC);
|
|
if ((error = xfs_trans_reserve(tp,
|
|
XFS_QM_DQALLOC_SPACE_RES(mp),
|
|
XFS_WRITE_LOG_RES(mp) +
|
|
BBTOB(XFS_QI_DQCHUNKLEN(mp)) - 1 +
|
|
128,
|
|
0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_WRITE_LOG_COUNT))) {
|
|
cancelflags = 0;
|
|
goto error0;
|
|
}
|
|
cancelflags = XFS_TRANS_RELEASE_LOG_RES;
|
|
}
|
|
|
|
/*
|
|
* Read it from disk; xfs_dqread() takes care of
|
|
* all the necessary initialization of dquot's fields (locks, etc)
|
|
*/
|
|
if ((error = xfs_qm_dqread(&tp, id, dqp, flags))) {
|
|
/*
|
|
* This can happen if quotas got turned off (ESRCH),
|
|
* or if the dquot didn't exist on disk and we ask to
|
|
* allocate (ENOENT).
|
|
*/
|
|
xfs_dqtrace_entry(dqp, "DQREAD FAIL");
|
|
cancelflags |= XFS_TRANS_ABORT;
|
|
goto error0;
|
|
}
|
|
if (tp) {
|
|
if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES,
|
|
NULL)))
|
|
goto error1;
|
|
}
|
|
|
|
*O_dqpp = dqp;
|
|
return (0);
|
|
|
|
error0:
|
|
ASSERT(error);
|
|
if (tp)
|
|
xfs_trans_cancel(tp, cancelflags);
|
|
error1:
|
|
xfs_qm_dqdestroy(dqp);
|
|
*O_dqpp = NULL;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Lookup a dquot in the incore dquot hashtable. We keep two separate
|
|
* hashtables for user and group dquots; and, these are global tables
|
|
* inside the XQM, not per-filesystem tables.
|
|
* The hash chain must be locked by caller, and it is left locked
|
|
* on return. Returning dquot is locked.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_dqlookup(
|
|
xfs_mount_t *mp,
|
|
xfs_dqid_t id,
|
|
xfs_dqhash_t *qh,
|
|
xfs_dquot_t **O_dqpp)
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
uint flist_locked;
|
|
xfs_dquot_t *d;
|
|
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
|
|
|
|
flist_locked = B_FALSE;
|
|
|
|
/*
|
|
* Traverse the hashchain looking for a match
|
|
*/
|
|
for (dqp = qh->qh_next; dqp != NULL; dqp = dqp->HL_NEXT) {
|
|
/*
|
|
* We already have the hashlock. We don't need the
|
|
* dqlock to look at the id field of the dquot, since the
|
|
* id can't be modified without the hashlock anyway.
|
|
*/
|
|
if (be32_to_cpu(dqp->q_core.d_id) == id && dqp->q_mount == mp) {
|
|
xfs_dqtrace_entry(dqp, "DQFOUND BY LOOKUP");
|
|
/*
|
|
* All in core dquots must be on the dqlist of mp
|
|
*/
|
|
ASSERT(dqp->MPL_PREVP != NULL);
|
|
|
|
xfs_dqlock(dqp);
|
|
if (dqp->q_nrefs == 0) {
|
|
ASSERT (XFS_DQ_IS_ON_FREELIST(dqp));
|
|
if (! xfs_qm_freelist_lock_nowait(xfs_Gqm)) {
|
|
xfs_dqtrace_entry(dqp, "DQLOOKUP: WANT");
|
|
|
|
/*
|
|
* We may have raced with dqreclaim_one()
|
|
* (and lost). So, flag that we don't
|
|
* want the dquot to be reclaimed.
|
|
*/
|
|
dqp->dq_flags |= XFS_DQ_WANT;
|
|
xfs_dqunlock(dqp);
|
|
xfs_qm_freelist_lock(xfs_Gqm);
|
|
xfs_dqlock(dqp);
|
|
dqp->dq_flags &= ~(XFS_DQ_WANT);
|
|
}
|
|
flist_locked = B_TRUE;
|
|
}
|
|
|
|
/*
|
|
* id couldn't have changed; we had the hashlock all
|
|
* along
|
|
*/
|
|
ASSERT(be32_to_cpu(dqp->q_core.d_id) == id);
|
|
|
|
if (flist_locked) {
|
|
if (dqp->q_nrefs != 0) {
|
|
xfs_qm_freelist_unlock(xfs_Gqm);
|
|
flist_locked = B_FALSE;
|
|
} else {
|
|
/*
|
|
* take it off the freelist
|
|
*/
|
|
xfs_dqtrace_entry(dqp,
|
|
"DQLOOKUP: TAKEOFF FL");
|
|
XQM_FREELIST_REMOVE(dqp);
|
|
/* xfs_qm_freelist_print(&(xfs_Gqm->
|
|
qm_dqfreelist),
|
|
"after removal"); */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* grab a reference
|
|
*/
|
|
XFS_DQHOLD(dqp);
|
|
|
|
if (flist_locked)
|
|
xfs_qm_freelist_unlock(xfs_Gqm);
|
|
/*
|
|
* move the dquot to the front of the hashchain
|
|
*/
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
|
|
if (dqp->HL_PREVP != &qh->qh_next) {
|
|
xfs_dqtrace_entry(dqp,
|
|
"DQLOOKUP: HASH MOVETOFRONT");
|
|
if ((d = dqp->HL_NEXT))
|
|
d->HL_PREVP = dqp->HL_PREVP;
|
|
*(dqp->HL_PREVP) = d;
|
|
d = qh->qh_next;
|
|
d->HL_PREVP = &dqp->HL_NEXT;
|
|
dqp->HL_NEXT = d;
|
|
dqp->HL_PREVP = &qh->qh_next;
|
|
qh->qh_next = dqp;
|
|
}
|
|
xfs_dqtrace_entry(dqp, "LOOKUP END");
|
|
*O_dqpp = dqp;
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
|
|
return (0);
|
|
}
|
|
}
|
|
|
|
*O_dqpp = NULL;
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(qh));
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Given the file system, inode OR id, and type (UDQUOT/GDQUOT), return a
|
|
* a locked dquot, doing an allocation (if requested) as needed.
|
|
* When both an inode and an id are given, the inode's id takes precedence.
|
|
* That is, if the id changes while we don't hold the ilock inside this
|
|
* function, the new dquot is returned, not necessarily the one requested
|
|
* in the id argument.
|
|
*/
|
|
int
|
|
xfs_qm_dqget(
|
|
xfs_mount_t *mp,
|
|
xfs_inode_t *ip, /* locked inode (optional) */
|
|
xfs_dqid_t id, /* uid/projid/gid depending on type */
|
|
uint type, /* XFS_DQ_USER/XFS_DQ_PROJ/XFS_DQ_GROUP */
|
|
uint flags, /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
|
|
xfs_dquot_t **O_dqpp) /* OUT : locked incore dquot */
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
xfs_dqhash_t *h;
|
|
uint version;
|
|
int error;
|
|
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
if ((! XFS_IS_UQUOTA_ON(mp) && type == XFS_DQ_USER) ||
|
|
(! XFS_IS_PQUOTA_ON(mp) && type == XFS_DQ_PROJ) ||
|
|
(! XFS_IS_GQUOTA_ON(mp) && type == XFS_DQ_GROUP)) {
|
|
return (ESRCH);
|
|
}
|
|
h = XFS_DQ_HASH(mp, id, type);
|
|
|
|
#ifdef DEBUG
|
|
if (xfs_do_dqerror) {
|
|
if ((xfs_dqerror_target == mp->m_ddev_targp) &&
|
|
(xfs_dqreq_num++ % xfs_dqerror_mod) == 0) {
|
|
cmn_err(CE_DEBUG, "Returning error in dqget");
|
|
return (EIO);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
again:
|
|
|
|
#ifdef DEBUG
|
|
ASSERT(type == XFS_DQ_USER ||
|
|
type == XFS_DQ_PROJ ||
|
|
type == XFS_DQ_GROUP);
|
|
if (ip) {
|
|
ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
|
|
if (type == XFS_DQ_USER)
|
|
ASSERT(ip->i_udquot == NULL);
|
|
else
|
|
ASSERT(ip->i_gdquot == NULL);
|
|
}
|
|
#endif
|
|
XFS_DQ_HASH_LOCK(h);
|
|
|
|
/*
|
|
* Look in the cache (hashtable).
|
|
* The chain is kept locked during lookup.
|
|
*/
|
|
if (xfs_qm_dqlookup(mp, id, h, O_dqpp) == 0) {
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqcachehits);
|
|
/*
|
|
* The dquot was found, moved to the front of the chain,
|
|
* taken off the freelist if it was on it, and locked
|
|
* at this point. Just unlock the hashchain and return.
|
|
*/
|
|
ASSERT(*O_dqpp);
|
|
ASSERT(XFS_DQ_IS_LOCKED(*O_dqpp));
|
|
XFS_DQ_HASH_UNLOCK(h);
|
|
xfs_dqtrace_entry(*O_dqpp, "DQGET DONE (FROM CACHE)");
|
|
return (0); /* success */
|
|
}
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqcachemisses);
|
|
|
|
/*
|
|
* Dquot cache miss. We don't want to keep the inode lock across
|
|
* a (potential) disk read. Also we don't want to deal with the lock
|
|
* ordering between quotainode and this inode. OTOH, dropping the inode
|
|
* lock here means dealing with a chown that can happen before
|
|
* we re-acquire the lock.
|
|
*/
|
|
if (ip)
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
/*
|
|
* Save the hashchain version stamp, and unlock the chain, so that
|
|
* we don't keep the lock across a disk read
|
|
*/
|
|
version = h->qh_version;
|
|
XFS_DQ_HASH_UNLOCK(h);
|
|
|
|
/*
|
|
* Allocate the dquot on the kernel heap, and read the ondisk
|
|
* portion off the disk. Also, do all the necessary initialization
|
|
* This can return ENOENT if dquot didn't exist on disk and we didn't
|
|
* ask it to allocate; ESRCH if quotas got turned off suddenly.
|
|
*/
|
|
if ((error = xfs_qm_idtodq(mp, id, type,
|
|
flags & (XFS_QMOPT_DQALLOC|XFS_QMOPT_DQREPAIR|
|
|
XFS_QMOPT_DOWARN),
|
|
&dqp))) {
|
|
if (ip)
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* See if this is mount code calling to look at the overall quota limits
|
|
* which are stored in the id == 0 user or group's dquot.
|
|
* Since we may not have done a quotacheck by this point, just return
|
|
* the dquot without attaching it to any hashtables, lists, etc, or even
|
|
* taking a reference.
|
|
* The caller must dqdestroy this once done.
|
|
*/
|
|
if (flags & XFS_QMOPT_DQSUSER) {
|
|
ASSERT(id == 0);
|
|
ASSERT(! ip);
|
|
goto dqret;
|
|
}
|
|
|
|
/*
|
|
* Dquot lock comes after hashlock in the lock ordering
|
|
*/
|
|
if (ip) {
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
if (! XFS_IS_DQTYPE_ON(mp, type)) {
|
|
/* inode stays locked on return */
|
|
xfs_qm_dqdestroy(dqp);
|
|
return XFS_ERROR(ESRCH);
|
|
}
|
|
/*
|
|
* A dquot could be attached to this inode by now, since
|
|
* we had dropped the ilock.
|
|
*/
|
|
if (type == XFS_DQ_USER) {
|
|
if (ip->i_udquot) {
|
|
xfs_qm_dqdestroy(dqp);
|
|
dqp = ip->i_udquot;
|
|
xfs_dqlock(dqp);
|
|
goto dqret;
|
|
}
|
|
} else {
|
|
if (ip->i_gdquot) {
|
|
xfs_qm_dqdestroy(dqp);
|
|
dqp = ip->i_gdquot;
|
|
xfs_dqlock(dqp);
|
|
goto dqret;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Hashlock comes after ilock in lock order
|
|
*/
|
|
XFS_DQ_HASH_LOCK(h);
|
|
if (version != h->qh_version) {
|
|
xfs_dquot_t *tmpdqp;
|
|
/*
|
|
* Now, see if somebody else put the dquot in the
|
|
* hashtable before us. This can happen because we didn't
|
|
* keep the hashchain lock. We don't have to worry about
|
|
* lock order between the two dquots here since dqp isn't
|
|
* on any findable lists yet.
|
|
*/
|
|
if (xfs_qm_dqlookup(mp, id, h, &tmpdqp) == 0) {
|
|
/*
|
|
* Duplicate found. Just throw away the new dquot
|
|
* and start over.
|
|
*/
|
|
xfs_qm_dqput(tmpdqp);
|
|
XFS_DQ_HASH_UNLOCK(h);
|
|
xfs_qm_dqdestroy(dqp);
|
|
XQM_STATS_INC(xqmstats.xs_qm_dquot_dups);
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Put the dquot at the beginning of the hash-chain and mp's list
|
|
* LOCK ORDER: hashlock, freelistlock, mplistlock, udqlock, gdqlock ..
|
|
*/
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(h));
|
|
dqp->q_hash = h;
|
|
XQM_HASHLIST_INSERT(h, dqp);
|
|
|
|
/*
|
|
* Attach this dquot to this filesystem's list of all dquots,
|
|
* kept inside the mount structure in m_quotainfo field
|
|
*/
|
|
xfs_qm_mplist_lock(mp);
|
|
|
|
/*
|
|
* We return a locked dquot to the caller, with a reference taken
|
|
*/
|
|
xfs_dqlock(dqp);
|
|
dqp->q_nrefs = 1;
|
|
|
|
XQM_MPLIST_INSERT(&(XFS_QI_MPL_LIST(mp)), dqp);
|
|
|
|
xfs_qm_mplist_unlock(mp);
|
|
XFS_DQ_HASH_UNLOCK(h);
|
|
dqret:
|
|
ASSERT((ip == NULL) || XFS_ISLOCKED_INODE_EXCL(ip));
|
|
xfs_dqtrace_entry(dqp, "DQGET DONE");
|
|
*O_dqpp = dqp;
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Release a reference to the dquot (decrement ref-count)
|
|
* and unlock it. If there is a group quota attached to this
|
|
* dquot, carefully release that too without tripping over
|
|
* deadlocks'n'stuff.
|
|
*/
|
|
void
|
|
xfs_qm_dqput(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
xfs_dquot_t *gdqp;
|
|
|
|
ASSERT(dqp->q_nrefs > 0);
|
|
ASSERT(XFS_DQ_IS_LOCKED(dqp));
|
|
xfs_dqtrace_entry(dqp, "DQPUT");
|
|
|
|
if (dqp->q_nrefs != 1) {
|
|
dqp->q_nrefs--;
|
|
xfs_dqunlock(dqp);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* drop the dqlock and acquire the freelist and dqlock
|
|
* in the right order; but try to get it out-of-order first
|
|
*/
|
|
if (! xfs_qm_freelist_lock_nowait(xfs_Gqm)) {
|
|
xfs_dqtrace_entry(dqp, "DQPUT: FLLOCK-WAIT");
|
|
xfs_dqunlock(dqp);
|
|
xfs_qm_freelist_lock(xfs_Gqm);
|
|
xfs_dqlock(dqp);
|
|
}
|
|
|
|
while (1) {
|
|
gdqp = NULL;
|
|
|
|
/* We can't depend on nrefs being == 1 here */
|
|
if (--dqp->q_nrefs == 0) {
|
|
xfs_dqtrace_entry(dqp, "DQPUT: ON FREELIST");
|
|
/*
|
|
* insert at end of the freelist.
|
|
*/
|
|
XQM_FREELIST_INSERT(&(xfs_Gqm->qm_dqfreelist), dqp);
|
|
|
|
/*
|
|
* If we just added a udquot to the freelist, then
|
|
* we want to release the gdquot reference that
|
|
* it (probably) has. Otherwise it'll keep the
|
|
* gdquot from getting reclaimed.
|
|
*/
|
|
if ((gdqp = dqp->q_gdquot)) {
|
|
/*
|
|
* Avoid a recursive dqput call
|
|
*/
|
|
xfs_dqlock(gdqp);
|
|
dqp->q_gdquot = NULL;
|
|
}
|
|
|
|
/* xfs_qm_freelist_print(&(xfs_Gqm->qm_dqfreelist),
|
|
"@@@@@++ Free list (after append) @@@@@+");
|
|
*/
|
|
}
|
|
xfs_dqunlock(dqp);
|
|
|
|
/*
|
|
* If we had a group quota inside the user quota as a hint,
|
|
* release it now.
|
|
*/
|
|
if (! gdqp)
|
|
break;
|
|
dqp = gdqp;
|
|
}
|
|
xfs_qm_freelist_unlock(xfs_Gqm);
|
|
}
|
|
|
|
/*
|
|
* Release a dquot. Flush it if dirty, then dqput() it.
|
|
* dquot must not be locked.
|
|
*/
|
|
void
|
|
xfs_qm_dqrele(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
ASSERT(dqp);
|
|
xfs_dqtrace_entry(dqp, "DQRELE");
|
|
|
|
xfs_dqlock(dqp);
|
|
/*
|
|
* We don't care to flush it if the dquot is dirty here.
|
|
* That will create stutters that we want to avoid.
|
|
* Instead we do a delayed write when we try to reclaim
|
|
* a dirty dquot. Also xfs_sync will take part of the burden...
|
|
*/
|
|
xfs_qm_dqput(dqp);
|
|
}
|
|
|
|
|
|
/*
|
|
* Write a modified dquot to disk.
|
|
* The dquot must be locked and the flush lock too taken by caller.
|
|
* The flush lock will not be unlocked until the dquot reaches the disk,
|
|
* but the dquot is free to be unlocked and modified by the caller
|
|
* in the interim. Dquot is still locked on return. This behavior is
|
|
* identical to that of inodes.
|
|
*/
|
|
int
|
|
xfs_qm_dqflush(
|
|
xfs_dquot_t *dqp,
|
|
uint flags)
|
|
{
|
|
xfs_mount_t *mp;
|
|
xfs_buf_t *bp;
|
|
xfs_disk_dquot_t *ddqp;
|
|
int error;
|
|
SPLDECL(s);
|
|
|
|
ASSERT(XFS_DQ_IS_LOCKED(dqp));
|
|
ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp));
|
|
xfs_dqtrace_entry(dqp, "DQFLUSH");
|
|
|
|
/*
|
|
* If not dirty, nada.
|
|
*/
|
|
if (!XFS_DQ_IS_DIRTY(dqp)) {
|
|
xfs_dqfunlock(dqp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Cant flush a pinned dquot. Wait for it.
|
|
*/
|
|
xfs_qm_dqunpin_wait(dqp);
|
|
|
|
/*
|
|
* This may have been unpinned because the filesystem is shutting
|
|
* down forcibly. If that's the case we must not write this dquot
|
|
* to disk, because the log record didn't make it to disk!
|
|
*/
|
|
if (XFS_FORCED_SHUTDOWN(dqp->q_mount)) {
|
|
dqp->dq_flags &= ~(XFS_DQ_DIRTY);
|
|
xfs_dqfunlock(dqp);
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
/*
|
|
* Get the buffer containing the on-disk dquot
|
|
* We don't need a transaction envelope because we know that the
|
|
* the ondisk-dquot has already been allocated for.
|
|
*/
|
|
if ((error = xfs_qm_dqtobp(NULL, dqp, &ddqp, &bp, XFS_QMOPT_DOWARN))) {
|
|
xfs_dqtrace_entry(dqp, "DQTOBP FAIL");
|
|
ASSERT(error != ENOENT);
|
|
/*
|
|
* Quotas could have gotten turned off (ESRCH)
|
|
*/
|
|
xfs_dqfunlock(dqp);
|
|
return (error);
|
|
}
|
|
|
|
if (xfs_qm_dqcheck(&dqp->q_core, be32_to_cpu(ddqp->d_id),
|
|
0, XFS_QMOPT_DOWARN, "dqflush (incore copy)")) {
|
|
xfs_force_shutdown(dqp->q_mount, SHUTDOWN_CORRUPT_INCORE);
|
|
return XFS_ERROR(EIO);
|
|
}
|
|
|
|
/* This is the only portion of data that needs to persist */
|
|
memcpy(ddqp, &(dqp->q_core), sizeof(xfs_disk_dquot_t));
|
|
|
|
/*
|
|
* Clear the dirty field and remember the flush lsn for later use.
|
|
*/
|
|
dqp->dq_flags &= ~(XFS_DQ_DIRTY);
|
|
mp = dqp->q_mount;
|
|
|
|
/* lsn is 64 bits */
|
|
AIL_LOCK(mp, s);
|
|
dqp->q_logitem.qli_flush_lsn = dqp->q_logitem.qli_item.li_lsn;
|
|
AIL_UNLOCK(mp, s);
|
|
|
|
/*
|
|
* Attach an iodone routine so that we can remove this dquot from the
|
|
* AIL and release the flush lock once the dquot is synced to disk.
|
|
*/
|
|
xfs_buf_attach_iodone(bp, (void(*)(xfs_buf_t *, xfs_log_item_t *))
|
|
xfs_qm_dqflush_done, &(dqp->q_logitem.qli_item));
|
|
/*
|
|
* If the buffer is pinned then push on the log so we won't
|
|
* get stuck waiting in the write for too long.
|
|
*/
|
|
if (XFS_BUF_ISPINNED(bp)) {
|
|
xfs_dqtrace_entry(dqp, "DQFLUSH LOG FORCE");
|
|
xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE);
|
|
}
|
|
|
|
if (flags & XFS_QMOPT_DELWRI) {
|
|
xfs_bdwrite(mp, bp);
|
|
} else if (flags & XFS_QMOPT_ASYNC) {
|
|
xfs_bawrite(mp, bp);
|
|
} else {
|
|
error = xfs_bwrite(mp, bp);
|
|
}
|
|
xfs_dqtrace_entry(dqp, "DQFLUSH END");
|
|
/*
|
|
* dqp is still locked, but caller is free to unlock it now.
|
|
*/
|
|
return (error);
|
|
|
|
}
|
|
|
|
/*
|
|
* This is the dquot flushing I/O completion routine. It is called
|
|
* from interrupt level when the buffer containing the dquot is
|
|
* flushed to disk. It is responsible for removing the dquot logitem
|
|
* from the AIL if it has not been re-logged, and unlocking the dquot's
|
|
* flush lock. This behavior is very similar to that of inodes..
|
|
*/
|
|
/*ARGSUSED*/
|
|
STATIC void
|
|
xfs_qm_dqflush_done(
|
|
xfs_buf_t *bp,
|
|
xfs_dq_logitem_t *qip)
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
SPLDECL(s);
|
|
|
|
dqp = qip->qli_dquot;
|
|
|
|
/*
|
|
* We only want to pull the item from the AIL if its
|
|
* location in the log has not changed since we started the flush.
|
|
* Thus, we only bother if the dquot's lsn has
|
|
* not changed. First we check the lsn outside the lock
|
|
* since it's cheaper, and then we recheck while
|
|
* holding the lock before removing the dquot from the AIL.
|
|
*/
|
|
if ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
|
|
qip->qli_item.li_lsn == qip->qli_flush_lsn) {
|
|
|
|
AIL_LOCK(dqp->q_mount, s);
|
|
/*
|
|
* xfs_trans_delete_ail() drops the AIL lock.
|
|
*/
|
|
if (qip->qli_item.li_lsn == qip->qli_flush_lsn)
|
|
xfs_trans_delete_ail(dqp->q_mount,
|
|
(xfs_log_item_t*)qip, s);
|
|
else
|
|
AIL_UNLOCK(dqp->q_mount, s);
|
|
}
|
|
|
|
/*
|
|
* Release the dq's flush lock since we're done with it.
|
|
*/
|
|
xfs_dqfunlock(dqp);
|
|
}
|
|
|
|
|
|
int
|
|
xfs_qm_dqflock_nowait(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
int locked;
|
|
|
|
locked = cpsema(&((dqp)->q_flock));
|
|
|
|
/* XXX ifdef these out */
|
|
if (locked)
|
|
(dqp)->dq_flags |= XFS_DQ_FLOCKED;
|
|
return (locked);
|
|
}
|
|
|
|
|
|
int
|
|
xfs_qm_dqlock_nowait(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
return (mutex_trylock(&((dqp)->q_qlock)));
|
|
}
|
|
|
|
void
|
|
xfs_dqlock(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
mutex_lock(&(dqp->q_qlock));
|
|
}
|
|
|
|
void
|
|
xfs_dqunlock(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
mutex_unlock(&(dqp->q_qlock));
|
|
if (dqp->q_logitem.qli_dquot == dqp) {
|
|
/* Once was dqp->q_mount, but might just have been cleared */
|
|
xfs_trans_unlocked_item(dqp->q_logitem.qli_item.li_mountp,
|
|
(xfs_log_item_t*)&(dqp->q_logitem));
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
xfs_dqunlock_nonotify(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
mutex_unlock(&(dqp->q_qlock));
|
|
}
|
|
|
|
void
|
|
xfs_dqlock2(
|
|
xfs_dquot_t *d1,
|
|
xfs_dquot_t *d2)
|
|
{
|
|
if (d1 && d2) {
|
|
ASSERT(d1 != d2);
|
|
if (be32_to_cpu(d1->q_core.d_id) >
|
|
be32_to_cpu(d2->q_core.d_id)) {
|
|
xfs_dqlock(d2);
|
|
xfs_dqlock(d1);
|
|
} else {
|
|
xfs_dqlock(d1);
|
|
xfs_dqlock(d2);
|
|
}
|
|
} else {
|
|
if (d1) {
|
|
xfs_dqlock(d1);
|
|
} else if (d2) {
|
|
xfs_dqlock(d2);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Take a dquot out of the mount's dqlist as well as the hashlist.
|
|
* This is called via unmount as well as quotaoff, and the purge
|
|
* will always succeed unless there are soft (temp) references
|
|
* outstanding.
|
|
*
|
|
* This returns 0 if it was purged, 1 if it wasn't. It's not an error code
|
|
* that we're returning! XXXsup - not cool.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
xfs_qm_dqpurge(
|
|
xfs_dquot_t *dqp,
|
|
uint flags)
|
|
{
|
|
xfs_dqhash_t *thishash;
|
|
xfs_mount_t *mp;
|
|
|
|
mp = dqp->q_mount;
|
|
|
|
ASSERT(XFS_QM_IS_MPLIST_LOCKED(mp));
|
|
ASSERT(XFS_DQ_IS_HASH_LOCKED(dqp->q_hash));
|
|
|
|
xfs_dqlock(dqp);
|
|
/*
|
|
* We really can't afford to purge a dquot that is
|
|
* referenced, because these are hard refs.
|
|
* It shouldn't happen in general because we went thru _all_ inodes in
|
|
* dqrele_all_inodes before calling this and didn't let the mountlock go.
|
|
* However it is possible that we have dquots with temporary
|
|
* references that are not attached to an inode. e.g. see xfs_setattr().
|
|
*/
|
|
if (dqp->q_nrefs != 0) {
|
|
xfs_dqunlock(dqp);
|
|
XFS_DQ_HASH_UNLOCK(dqp->q_hash);
|
|
return (1);
|
|
}
|
|
|
|
ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
|
|
|
|
/*
|
|
* If we're turning off quotas, we have to make sure that, for
|
|
* example, we don't delete quota disk blocks while dquots are
|
|
* in the process of getting written to those disk blocks.
|
|
* This dquot might well be on AIL, and we can't leave it there
|
|
* if we're turning off quotas. Basically, we need this flush
|
|
* lock, and are willing to block on it.
|
|
*/
|
|
if (! xfs_qm_dqflock_nowait(dqp)) {
|
|
/*
|
|
* Block on the flush lock after nudging dquot buffer,
|
|
* if it is incore.
|
|
*/
|
|
xfs_qm_dqflock_pushbuf_wait(dqp);
|
|
}
|
|
|
|
/*
|
|
* XXXIf we're turning this type of quotas off, we don't care
|
|
* about the dirty metadata sitting in this dquot. OTOH, if
|
|
* we're unmounting, we do care, so we flush it and wait.
|
|
*/
|
|
if (XFS_DQ_IS_DIRTY(dqp)) {
|
|
xfs_dqtrace_entry(dqp, "DQPURGE ->DQFLUSH: DQDIRTY");
|
|
/* dqflush unlocks dqflock */
|
|
/*
|
|
* Given that dqpurge is a very rare occurrence, it is OK
|
|
* that we're holding the hashlist and mplist locks
|
|
* across the disk write. But, ... XXXsup
|
|
*
|
|
* We don't care about getting disk errors here. We need
|
|
* to purge this dquot anyway, so we go ahead regardless.
|
|
*/
|
|
(void) xfs_qm_dqflush(dqp, XFS_QMOPT_SYNC);
|
|
xfs_dqflock(dqp);
|
|
}
|
|
ASSERT(dqp->q_pincount == 0);
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
|
|
!(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
|
|
|
|
thishash = dqp->q_hash;
|
|
XQM_HASHLIST_REMOVE(thishash, dqp);
|
|
XQM_MPLIST_REMOVE(&(XFS_QI_MPL_LIST(mp)), dqp);
|
|
/*
|
|
* XXX Move this to the front of the freelist, if we can get the
|
|
* freelist lock.
|
|
*/
|
|
ASSERT(XFS_DQ_IS_ON_FREELIST(dqp));
|
|
|
|
dqp->q_mount = NULL;
|
|
dqp->q_hash = NULL;
|
|
dqp->dq_flags = XFS_DQ_INACTIVE;
|
|
memset(&dqp->q_core, 0, sizeof(dqp->q_core));
|
|
xfs_dqfunlock(dqp);
|
|
xfs_dqunlock(dqp);
|
|
XFS_DQ_HASH_UNLOCK(thishash);
|
|
return (0);
|
|
}
|
|
|
|
|
|
#ifdef QUOTADEBUG
|
|
void
|
|
xfs_qm_dqprint(xfs_dquot_t *dqp)
|
|
{
|
|
cmn_err(CE_DEBUG, "-----------KERNEL DQUOT----------------");
|
|
cmn_err(CE_DEBUG, "---- dquotID = %d",
|
|
(int)be32_to_cpu(dqp->q_core.d_id));
|
|
cmn_err(CE_DEBUG, "---- type = %s", DQFLAGTO_TYPESTR(dqp));
|
|
cmn_err(CE_DEBUG, "---- fs = 0x%p", dqp->q_mount);
|
|
cmn_err(CE_DEBUG, "---- blkno = 0x%x", (int) dqp->q_blkno);
|
|
cmn_err(CE_DEBUG, "---- boffset = 0x%x", (int) dqp->q_bufoffset);
|
|
cmn_err(CE_DEBUG, "---- blkhlimit = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_blk_hardlimit),
|
|
(int)be64_to_cpu(dqp->q_core.d_blk_hardlimit));
|
|
cmn_err(CE_DEBUG, "---- blkslimit = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_blk_softlimit),
|
|
(int)be64_to_cpu(dqp->q_core.d_blk_softlimit));
|
|
cmn_err(CE_DEBUG, "---- inohlimit = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_ino_hardlimit),
|
|
(int)be64_to_cpu(dqp->q_core.d_ino_hardlimit));
|
|
cmn_err(CE_DEBUG, "---- inoslimit = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_ino_softlimit),
|
|
(int)be64_to_cpu(dqp->q_core.d_ino_softlimit));
|
|
cmn_err(CE_DEBUG, "---- bcount = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_bcount),
|
|
(int)be64_to_cpu(dqp->q_core.d_bcount));
|
|
cmn_err(CE_DEBUG, "---- icount = %Lu (0x%x)",
|
|
be64_to_cpu(dqp->q_core.d_icount),
|
|
(int)be64_to_cpu(dqp->q_core.d_icount));
|
|
cmn_err(CE_DEBUG, "---- btimer = %d",
|
|
(int)be32_to_cpu(dqp->q_core.d_btimer));
|
|
cmn_err(CE_DEBUG, "---- itimer = %d",
|
|
(int)be32_to_cpu(dqp->q_core.d_itimer));
|
|
cmn_err(CE_DEBUG, "---------------------------");
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Give the buffer a little push if it is incore and
|
|
* wait on the flush lock.
|
|
*/
|
|
void
|
|
xfs_qm_dqflock_pushbuf_wait(
|
|
xfs_dquot_t *dqp)
|
|
{
|
|
xfs_buf_t *bp;
|
|
|
|
/*
|
|
* Check to see if the dquot has been flushed delayed
|
|
* write. If so, grab its buffer and send it
|
|
* out immediately. We'll be able to acquire
|
|
* the flush lock when the I/O completes.
|
|
*/
|
|
bp = xfs_incore(dqp->q_mount->m_ddev_targp, dqp->q_blkno,
|
|
XFS_QI_DQCHUNKLEN(dqp->q_mount),
|
|
XFS_INCORE_TRYLOCK);
|
|
if (bp != NULL) {
|
|
if (XFS_BUF_ISDELAYWRITE(bp)) {
|
|
if (XFS_BUF_ISPINNED(bp)) {
|
|
xfs_log_force(dqp->q_mount,
|
|
(xfs_lsn_t)0,
|
|
XFS_LOG_FORCE);
|
|
}
|
|
xfs_bawrite(dqp->q_mount, bp);
|
|
} else {
|
|
xfs_buf_relse(bp);
|
|
}
|
|
}
|
|
xfs_dqflock(dqp);
|
|
}
|