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db3e74b582
The doalloc arg in xfs_qm_dqattach_one() is a flag that indicates
whether a new area to handle quota information will be allocated
if needed. Originally, it was passed to xfs_qm_dqget(), but has
been removed by the following commit (probably by mistake):
commit 8e9b6e7fa4
Author: Christoph Hellwig <hch@lst.de>
Date: Sun Feb 8 21:51:42 2009 +0100
xfs: remove the unused XFS_QMOPT_DQLOCK flag
As the result, xfs_qm_dqget() called from xfs_qm_dqattach_one()
never allocates the new area even if it is needed.
This patch gives the doalloc arg to xfs_qm_dqget() in
xfs_qm_dqattach_one() to fix this problem.
Signed-off-by: Mitsuo Hayasaka <mitsuo.hayasaka.hu@hitachi.com>
Cc: Alex Elder <aelder@sgi.com>
Cc: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
2416 lines
58 KiB
C
2416 lines
58 KiB
C
/*
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* Copyright (c) 2000-2005 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_alloc.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_ialloc_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_ialloc.h"
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#include "xfs_itable.h"
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#include "xfs_rtalloc.h"
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#include "xfs_error.h"
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#include "xfs_bmap.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_utils.h"
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#include "xfs_qm.h"
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#include "xfs_trace.h"
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/*
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* The global quota manager. There is only one of these for the entire
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* system, _not_ one per file system. XQM keeps track of the overall
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* quota functionality, including maintaining the freelist and hash
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* tables of dquots.
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*/
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struct mutex xfs_Gqm_lock;
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struct xfs_qm *xfs_Gqm;
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uint ndquot;
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kmem_zone_t *qm_dqzone;
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kmem_zone_t *qm_dqtrxzone;
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STATIC void xfs_qm_list_init(xfs_dqlist_t *, char *, int);
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STATIC void xfs_qm_list_destroy(xfs_dqlist_t *);
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STATIC int xfs_qm_init_quotainos(xfs_mount_t *);
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STATIC int xfs_qm_init_quotainfo(xfs_mount_t *);
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STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *);
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static struct shrinker xfs_qm_shaker = {
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.shrink = xfs_qm_shake,
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.seeks = DEFAULT_SEEKS,
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};
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/*
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* Initialize the XQM structure.
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* Note that there is not one quota manager per file system.
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*/
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STATIC struct xfs_qm *
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xfs_Gqm_init(void)
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{
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xfs_dqhash_t *udqhash, *gdqhash;
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xfs_qm_t *xqm;
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size_t hsize;
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uint i;
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/*
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* Initialize the dquot hash tables.
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*/
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udqhash = kmem_zalloc_greedy(&hsize,
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XFS_QM_HASHSIZE_LOW * sizeof(xfs_dqhash_t),
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XFS_QM_HASHSIZE_HIGH * sizeof(xfs_dqhash_t));
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if (!udqhash)
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goto out;
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gdqhash = kmem_zalloc_large(hsize);
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if (!gdqhash)
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goto out_free_udqhash;
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hsize /= sizeof(xfs_dqhash_t);
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ndquot = hsize << 8;
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xqm = kmem_zalloc(sizeof(xfs_qm_t), KM_SLEEP);
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xqm->qm_dqhashmask = hsize - 1;
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xqm->qm_usr_dqhtable = udqhash;
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xqm->qm_grp_dqhtable = gdqhash;
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ASSERT(xqm->qm_usr_dqhtable != NULL);
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ASSERT(xqm->qm_grp_dqhtable != NULL);
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for (i = 0; i < hsize; i++) {
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xfs_qm_list_init(&(xqm->qm_usr_dqhtable[i]), "uxdqh", i);
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xfs_qm_list_init(&(xqm->qm_grp_dqhtable[i]), "gxdqh", i);
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}
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/*
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* Freelist of all dquots of all file systems
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*/
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INIT_LIST_HEAD(&xqm->qm_dqfrlist);
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xqm->qm_dqfrlist_cnt = 0;
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mutex_init(&xqm->qm_dqfrlist_lock);
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/*
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* dquot zone. we register our own low-memory callback.
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*/
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if (!qm_dqzone) {
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xqm->qm_dqzone = kmem_zone_init(sizeof(xfs_dquot_t),
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"xfs_dquots");
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qm_dqzone = xqm->qm_dqzone;
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} else
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xqm->qm_dqzone = qm_dqzone;
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register_shrinker(&xfs_qm_shaker);
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/*
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* The t_dqinfo portion of transactions.
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*/
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if (!qm_dqtrxzone) {
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xqm->qm_dqtrxzone = kmem_zone_init(sizeof(xfs_dquot_acct_t),
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"xfs_dqtrx");
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qm_dqtrxzone = xqm->qm_dqtrxzone;
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} else
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xqm->qm_dqtrxzone = qm_dqtrxzone;
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atomic_set(&xqm->qm_totaldquots, 0);
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xqm->qm_dqfree_ratio = XFS_QM_DQFREE_RATIO;
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xqm->qm_nrefs = 0;
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return xqm;
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out_free_udqhash:
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kmem_free_large(udqhash);
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out:
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return NULL;
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}
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/*
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* Destroy the global quota manager when its reference count goes to zero.
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*/
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STATIC void
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xfs_qm_destroy(
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struct xfs_qm *xqm)
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{
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struct xfs_dquot *dqp, *n;
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int hsize, i;
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ASSERT(xqm != NULL);
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ASSERT(xqm->qm_nrefs == 0);
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unregister_shrinker(&xfs_qm_shaker);
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hsize = xqm->qm_dqhashmask + 1;
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for (i = 0; i < hsize; i++) {
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xfs_qm_list_destroy(&(xqm->qm_usr_dqhtable[i]));
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xfs_qm_list_destroy(&(xqm->qm_grp_dqhtable[i]));
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}
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kmem_free_large(xqm->qm_usr_dqhtable);
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kmem_free_large(xqm->qm_grp_dqhtable);
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xqm->qm_usr_dqhtable = NULL;
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xqm->qm_grp_dqhtable = NULL;
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xqm->qm_dqhashmask = 0;
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/* frlist cleanup */
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mutex_lock(&xqm->qm_dqfrlist_lock);
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list_for_each_entry_safe(dqp, n, &xqm->qm_dqfrlist, q_freelist) {
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xfs_dqlock(dqp);
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list_del_init(&dqp->q_freelist);
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xfs_Gqm->qm_dqfrlist_cnt--;
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xfs_dqunlock(dqp);
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xfs_qm_dqdestroy(dqp);
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}
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mutex_unlock(&xqm->qm_dqfrlist_lock);
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mutex_destroy(&xqm->qm_dqfrlist_lock);
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kmem_free(xqm);
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}
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/*
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* Called at mount time to let XQM know that another file system is
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* starting quotas. This isn't crucial information as the individual mount
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* structures are pretty independent, but it helps the XQM keep a
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* global view of what's going on.
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*/
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/* ARGSUSED */
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STATIC int
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xfs_qm_hold_quotafs_ref(
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struct xfs_mount *mp)
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{
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/*
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* Need to lock the xfs_Gqm structure for things like this. For example,
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* the structure could disappear between the entry to this routine and
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* a HOLD operation if not locked.
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*/
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mutex_lock(&xfs_Gqm_lock);
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if (!xfs_Gqm) {
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xfs_Gqm = xfs_Gqm_init();
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if (!xfs_Gqm) {
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mutex_unlock(&xfs_Gqm_lock);
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return ENOMEM;
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}
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}
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/*
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* We can keep a list of all filesystems with quotas mounted for
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* debugging and statistical purposes, but ...
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* Just take a reference and get out.
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*/
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xfs_Gqm->qm_nrefs++;
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mutex_unlock(&xfs_Gqm_lock);
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return 0;
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}
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/*
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* Release the reference that a filesystem took at mount time,
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* so that we know when we need to destroy the entire quota manager.
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*/
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/* ARGSUSED */
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STATIC void
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xfs_qm_rele_quotafs_ref(
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struct xfs_mount *mp)
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{
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xfs_dquot_t *dqp, *n;
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ASSERT(xfs_Gqm);
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ASSERT(xfs_Gqm->qm_nrefs > 0);
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/*
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* Go thru the freelist and destroy all inactive dquots.
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*/
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mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
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list_for_each_entry_safe(dqp, n, &xfs_Gqm->qm_dqfrlist, q_freelist) {
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xfs_dqlock(dqp);
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if (dqp->dq_flags & XFS_DQ_INACTIVE) {
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ASSERT(dqp->q_mount == NULL);
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ASSERT(! XFS_DQ_IS_DIRTY(dqp));
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ASSERT(list_empty(&dqp->q_hashlist));
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ASSERT(list_empty(&dqp->q_mplist));
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list_del_init(&dqp->q_freelist);
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xfs_Gqm->qm_dqfrlist_cnt--;
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xfs_dqunlock(dqp);
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xfs_qm_dqdestroy(dqp);
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} else {
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xfs_dqunlock(dqp);
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}
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}
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mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
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/*
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* Destroy the entire XQM. If somebody mounts with quotaon, this'll
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* be restarted.
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*/
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mutex_lock(&xfs_Gqm_lock);
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if (--xfs_Gqm->qm_nrefs == 0) {
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xfs_qm_destroy(xfs_Gqm);
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xfs_Gqm = NULL;
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}
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mutex_unlock(&xfs_Gqm_lock);
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}
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/*
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* Just destroy the quotainfo structure.
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*/
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void
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xfs_qm_unmount(
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struct xfs_mount *mp)
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{
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if (mp->m_quotainfo) {
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xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
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xfs_qm_destroy_quotainfo(mp);
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}
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}
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/*
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* This is called from xfs_mountfs to start quotas and initialize all
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* necessary data structures like quotainfo. This is also responsible for
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* running a quotacheck as necessary. We are guaranteed that the superblock
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* is consistently read in at this point.
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*
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* If we fail here, the mount will continue with quota turned off. We don't
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* need to inidicate success or failure at all.
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*/
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void
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xfs_qm_mount_quotas(
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xfs_mount_t *mp)
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{
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int error = 0;
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uint sbf;
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/*
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* If quotas on realtime volumes is not supported, we disable
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* quotas immediately.
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*/
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if (mp->m_sb.sb_rextents) {
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xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
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mp->m_qflags = 0;
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goto write_changes;
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}
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ASSERT(XFS_IS_QUOTA_RUNNING(mp));
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/*
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* Allocate the quotainfo structure inside the mount struct, and
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* create quotainode(s), and change/rev superblock if necessary.
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*/
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error = xfs_qm_init_quotainfo(mp);
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if (error) {
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/*
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* We must turn off quotas.
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*/
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ASSERT(mp->m_quotainfo == NULL);
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mp->m_qflags = 0;
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goto write_changes;
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}
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/*
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* If any of the quotas are not consistent, do a quotacheck.
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*/
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if (XFS_QM_NEED_QUOTACHECK(mp)) {
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error = xfs_qm_quotacheck(mp);
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if (error) {
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/* Quotacheck failed and disabled quotas. */
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return;
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}
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}
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/*
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* If one type of quotas is off, then it will lose its
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* quotachecked status, since we won't be doing accounting for
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* that type anymore.
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*/
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if (!XFS_IS_UQUOTA_ON(mp))
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mp->m_qflags &= ~XFS_UQUOTA_CHKD;
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if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
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mp->m_qflags &= ~XFS_OQUOTA_CHKD;
|
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|
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write_changes:
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/*
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* We actually don't have to acquire the m_sb_lock at all.
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* This can only be called from mount, and that's single threaded. XXX
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*/
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spin_lock(&mp->m_sb_lock);
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sbf = mp->m_sb.sb_qflags;
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mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
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spin_unlock(&mp->m_sb_lock);
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|
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if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
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if (xfs_qm_write_sb_changes(mp, XFS_SB_QFLAGS)) {
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/*
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* We could only have been turning quotas off.
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* We aren't in very good shape actually because
|
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* the incore structures are convinced that quotas are
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* off, but the on disk superblock doesn't know that !
|
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*/
|
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ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
|
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xfs_alert(mp, "%s: Superblock update failed!",
|
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__func__);
|
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}
|
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}
|
|
|
|
if (error) {
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xfs_warn(mp, "Failed to initialize disk quotas.");
|
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return;
|
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}
|
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}
|
|
|
|
/*
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|
* Called from the vfsops layer.
|
|
*/
|
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void
|
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xfs_qm_unmount_quotas(
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xfs_mount_t *mp)
|
|
{
|
|
/*
|
|
* Release the dquots that root inode, et al might be holding,
|
|
* before we flush quotas and blow away the quotainfo structure.
|
|
*/
|
|
ASSERT(mp->m_rootip);
|
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xfs_qm_dqdetach(mp->m_rootip);
|
|
if (mp->m_rbmip)
|
|
xfs_qm_dqdetach(mp->m_rbmip);
|
|
if (mp->m_rsumip)
|
|
xfs_qm_dqdetach(mp->m_rsumip);
|
|
|
|
/*
|
|
* Release the quota inodes.
|
|
*/
|
|
if (mp->m_quotainfo) {
|
|
if (mp->m_quotainfo->qi_uquotaip) {
|
|
IRELE(mp->m_quotainfo->qi_uquotaip);
|
|
mp->m_quotainfo->qi_uquotaip = NULL;
|
|
}
|
|
if (mp->m_quotainfo->qi_gquotaip) {
|
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IRELE(mp->m_quotainfo->qi_gquotaip);
|
|
mp->m_quotainfo->qi_gquotaip = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Flush all dquots of the given file system to disk. The dquots are
|
|
* _not_ purged from memory here, just their data written to disk.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_dqflush_all(
|
|
struct xfs_mount *mp,
|
|
int sync_mode)
|
|
{
|
|
struct xfs_quotainfo *q = mp->m_quotainfo;
|
|
int recl;
|
|
struct xfs_dquot *dqp;
|
|
int error;
|
|
|
|
if (!q)
|
|
return 0;
|
|
again:
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
|
|
xfs_dqlock(dqp);
|
|
if (! XFS_DQ_IS_DIRTY(dqp)) {
|
|
xfs_dqunlock(dqp);
|
|
continue;
|
|
}
|
|
|
|
/* XXX a sentinel would be better */
|
|
recl = q->qi_dqreclaims;
|
|
if (!xfs_dqflock_nowait(dqp)) {
|
|
/*
|
|
* If we can't grab the flush lock then 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.
|
|
*/
|
|
xfs_qm_dqflock_pushbuf_wait(dqp);
|
|
}
|
|
/*
|
|
* Let go of the mplist lock. We don't want to hold it
|
|
* across a disk write.
|
|
*/
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
error = xfs_qm_dqflush(dqp, sync_mode);
|
|
xfs_dqunlock(dqp);
|
|
if (error)
|
|
return error;
|
|
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
if (recl != q->qi_dqreclaims) {
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
/* XXX restart limit */
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
/* return ! busy */
|
|
return 0;
|
|
}
|
|
/*
|
|
* Release the group dquot pointers the user dquots may be
|
|
* carrying around as a hint. mplist is locked on entry and exit.
|
|
*/
|
|
STATIC void
|
|
xfs_qm_detach_gdquots(
|
|
struct xfs_mount *mp)
|
|
{
|
|
struct xfs_quotainfo *q = mp->m_quotainfo;
|
|
struct xfs_dquot *dqp, *gdqp;
|
|
int nrecl;
|
|
|
|
again:
|
|
ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
|
|
list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
|
|
xfs_dqlock(dqp);
|
|
if ((gdqp = dqp->q_gdquot)) {
|
|
xfs_dqlock(gdqp);
|
|
dqp->q_gdquot = NULL;
|
|
}
|
|
xfs_dqunlock(dqp);
|
|
|
|
if (gdqp) {
|
|
/*
|
|
* Can't hold the mplist lock across a dqput.
|
|
* XXXmust convert to marker based iterations here.
|
|
*/
|
|
nrecl = q->qi_dqreclaims;
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
xfs_qm_dqput(gdqp);
|
|
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
if (nrecl != q->qi_dqreclaims)
|
|
goto again;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Go through all the incore dquots of this file system and take them
|
|
* off the mplist and hashlist, if the dquot type matches the dqtype
|
|
* parameter. This is used when turning off quota accounting for
|
|
* users and/or groups, as well as when the filesystem is unmounting.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_dqpurge_int(
|
|
struct xfs_mount *mp,
|
|
uint flags)
|
|
{
|
|
struct xfs_quotainfo *q = mp->m_quotainfo;
|
|
struct xfs_dquot *dqp, *n;
|
|
uint dqtype;
|
|
int nrecl;
|
|
int nmisses;
|
|
|
|
if (!q)
|
|
return 0;
|
|
|
|
dqtype = (flags & XFS_QMOPT_UQUOTA) ? XFS_DQ_USER : 0;
|
|
dqtype |= (flags & XFS_QMOPT_PQUOTA) ? XFS_DQ_PROJ : 0;
|
|
dqtype |= (flags & XFS_QMOPT_GQUOTA) ? XFS_DQ_GROUP : 0;
|
|
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
|
|
/*
|
|
* In the first pass through all incore dquots of this filesystem,
|
|
* we release the group dquot pointers the user dquots may be
|
|
* carrying around as a hint. We need to do this irrespective of
|
|
* what's being turned off.
|
|
*/
|
|
xfs_qm_detach_gdquots(mp);
|
|
|
|
again:
|
|
nmisses = 0;
|
|
ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
|
|
/*
|
|
* Try to get rid of all of the unwanted dquots. The idea is to
|
|
* get them off mplist and hashlist, but leave them on freelist.
|
|
*/
|
|
list_for_each_entry_safe(dqp, n, &q->qi_dqlist, q_mplist) {
|
|
/*
|
|
* It's OK to look at the type without taking dqlock here.
|
|
* We're holding the mplist lock here, and that's needed for
|
|
* a dqreclaim.
|
|
*/
|
|
if ((dqp->dq_flags & dqtype) == 0)
|
|
continue;
|
|
|
|
if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
|
|
nrecl = q->qi_dqreclaims;
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
mutex_lock(&dqp->q_hash->qh_lock);
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
|
|
/*
|
|
* XXXTheoretically, we can get into a very long
|
|
* ping pong game here.
|
|
* No one can be adding dquots to the mplist at
|
|
* this point, but somebody might be taking things off.
|
|
*/
|
|
if (nrecl != q->qi_dqreclaims) {
|
|
mutex_unlock(&dqp->q_hash->qh_lock);
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Take the dquot off the mplist and hashlist. It may remain on
|
|
* freelist in INACTIVE state.
|
|
*/
|
|
nmisses += xfs_qm_dqpurge(dqp);
|
|
}
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
return nmisses;
|
|
}
|
|
|
|
int
|
|
xfs_qm_dqpurge_all(
|
|
xfs_mount_t *mp,
|
|
uint flags)
|
|
{
|
|
int ndquots;
|
|
|
|
/*
|
|
* Purge the dquot cache.
|
|
* None of the dquots should really be busy at this point.
|
|
*/
|
|
if (mp->m_quotainfo) {
|
|
while ((ndquots = xfs_qm_dqpurge_int(mp, flags))) {
|
|
delay(ndquots * 10);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_qm_dqattach_one(
|
|
xfs_inode_t *ip,
|
|
xfs_dqid_t id,
|
|
uint type,
|
|
uint doalloc,
|
|
xfs_dquot_t *udqhint, /* hint */
|
|
xfs_dquot_t **IO_idqpp)
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
int error;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
error = 0;
|
|
|
|
/*
|
|
* See if we already have it in the inode itself. IO_idqpp is
|
|
* &i_udquot or &i_gdquot. This made the code look weird, but
|
|
* made the logic a lot simpler.
|
|
*/
|
|
dqp = *IO_idqpp;
|
|
if (dqp) {
|
|
trace_xfs_dqattach_found(dqp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* udqhint is the i_udquot field in inode, and is non-NULL only
|
|
* when the type arg is group/project. Its purpose is to save a
|
|
* lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
|
|
* the user dquot.
|
|
*/
|
|
if (udqhint) {
|
|
ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
|
|
xfs_dqlock(udqhint);
|
|
|
|
/*
|
|
* No need to take dqlock to look at the id.
|
|
*
|
|
* The ID can't change until it gets reclaimed, and it won't
|
|
* be reclaimed as long as we have a ref from inode and we
|
|
* hold the ilock.
|
|
*/
|
|
dqp = udqhint->q_gdquot;
|
|
if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
|
|
xfs_dqlock(dqp);
|
|
XFS_DQHOLD(dqp);
|
|
ASSERT(*IO_idqpp == NULL);
|
|
*IO_idqpp = dqp;
|
|
|
|
xfs_dqunlock(dqp);
|
|
xfs_dqunlock(udqhint);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We can't hold a dquot lock when we call the dqget code.
|
|
* We'll deadlock in no time, because of (not conforming to)
|
|
* lock ordering - the inodelock comes before any dquot lock,
|
|
* and we may drop and reacquire the ilock in xfs_qm_dqget().
|
|
*/
|
|
xfs_dqunlock(udqhint);
|
|
}
|
|
|
|
/*
|
|
* Find the dquot from somewhere. This bumps the
|
|
* reference count of dquot and returns it locked.
|
|
* 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.
|
|
*/
|
|
error = xfs_qm_dqget(ip->i_mount, ip, id, type,
|
|
doalloc | XFS_QMOPT_DOWARN, &dqp);
|
|
if (error)
|
|
return error;
|
|
|
|
trace_xfs_dqattach_get(dqp);
|
|
|
|
/*
|
|
* dqget may have dropped and re-acquired the ilock, but it guarantees
|
|
* that the dquot returned is the one that should go in the inode.
|
|
*/
|
|
*IO_idqpp = dqp;
|
|
xfs_dqunlock(dqp);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Given a udquot and gdquot, attach a ptr to the group dquot in the
|
|
* udquot as a hint for future lookups. The idea sounds simple, but the
|
|
* execution isn't, because the udquot might have a group dquot attached
|
|
* already and getting rid of that gets us into lock ordering constraints.
|
|
* The process is complicated more by the fact that the dquots may or may not
|
|
* be locked on entry.
|
|
*/
|
|
STATIC void
|
|
xfs_qm_dqattach_grouphint(
|
|
xfs_dquot_t *udq,
|
|
xfs_dquot_t *gdq)
|
|
{
|
|
xfs_dquot_t *tmp;
|
|
|
|
xfs_dqlock(udq);
|
|
|
|
if ((tmp = udq->q_gdquot)) {
|
|
if (tmp == gdq) {
|
|
xfs_dqunlock(udq);
|
|
return;
|
|
}
|
|
|
|
udq->q_gdquot = NULL;
|
|
/*
|
|
* We can't keep any dqlocks when calling dqrele,
|
|
* because the freelist lock comes before dqlocks.
|
|
*/
|
|
xfs_dqunlock(udq);
|
|
/*
|
|
* we took a hard reference once upon a time in dqget,
|
|
* so give it back when the udquot no longer points at it
|
|
* dqput() does the unlocking of the dquot.
|
|
*/
|
|
xfs_qm_dqrele(tmp);
|
|
|
|
xfs_dqlock(udq);
|
|
xfs_dqlock(gdq);
|
|
|
|
} else {
|
|
ASSERT(XFS_DQ_IS_LOCKED(udq));
|
|
xfs_dqlock(gdq);
|
|
}
|
|
|
|
ASSERT(XFS_DQ_IS_LOCKED(udq));
|
|
ASSERT(XFS_DQ_IS_LOCKED(gdq));
|
|
/*
|
|
* Somebody could have attached a gdquot here,
|
|
* when we dropped the uqlock. If so, just do nothing.
|
|
*/
|
|
if (udq->q_gdquot == NULL) {
|
|
XFS_DQHOLD(gdq);
|
|
udq->q_gdquot = gdq;
|
|
}
|
|
|
|
xfs_dqunlock(gdq);
|
|
xfs_dqunlock(udq);
|
|
}
|
|
|
|
|
|
/*
|
|
* Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
|
|
* into account.
|
|
* If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
|
|
* Inode may get unlocked and relocked in here, and the caller must deal with
|
|
* the consequences.
|
|
*/
|
|
int
|
|
xfs_qm_dqattach_locked(
|
|
xfs_inode_t *ip,
|
|
uint flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
uint nquotas = 0;
|
|
int error = 0;
|
|
|
|
if (!XFS_IS_QUOTA_RUNNING(mp) ||
|
|
!XFS_IS_QUOTA_ON(mp) ||
|
|
!XFS_NOT_DQATTACHED(mp, ip) ||
|
|
ip->i_ino == mp->m_sb.sb_uquotino ||
|
|
ip->i_ino == mp->m_sb.sb_gquotino)
|
|
return 0;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
|
|
if (XFS_IS_UQUOTA_ON(mp)) {
|
|
error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
|
|
flags & XFS_QMOPT_DQALLOC,
|
|
NULL, &ip->i_udquot);
|
|
if (error)
|
|
goto done;
|
|
nquotas++;
|
|
}
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
if (XFS_IS_OQUOTA_ON(mp)) {
|
|
error = XFS_IS_GQUOTA_ON(mp) ?
|
|
xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
|
|
flags & XFS_QMOPT_DQALLOC,
|
|
ip->i_udquot, &ip->i_gdquot) :
|
|
xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
|
|
flags & XFS_QMOPT_DQALLOC,
|
|
ip->i_udquot, &ip->i_gdquot);
|
|
/*
|
|
* Don't worry about the udquot that we may have
|
|
* attached above. It'll get detached, if not already.
|
|
*/
|
|
if (error)
|
|
goto done;
|
|
nquotas++;
|
|
}
|
|
|
|
/*
|
|
* Attach this group quota to the user quota as a hint.
|
|
* This WON'T, in general, result in a thrash.
|
|
*/
|
|
if (nquotas == 2) {
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(ip->i_udquot);
|
|
ASSERT(ip->i_gdquot);
|
|
|
|
/*
|
|
* We may or may not have the i_udquot locked at this point,
|
|
* but this check is OK since we don't depend on the i_gdquot to
|
|
* be accurate 100% all the time. It is just a hint, and this
|
|
* will succeed in general.
|
|
*/
|
|
if (ip->i_udquot->q_gdquot == ip->i_gdquot)
|
|
goto done;
|
|
/*
|
|
* Attach i_gdquot to the gdquot hint inside the i_udquot.
|
|
*/
|
|
xfs_qm_dqattach_grouphint(ip->i_udquot, ip->i_gdquot);
|
|
}
|
|
|
|
done:
|
|
#ifdef DEBUG
|
|
if (!error) {
|
|
if (XFS_IS_UQUOTA_ON(mp))
|
|
ASSERT(ip->i_udquot);
|
|
if (XFS_IS_OQUOTA_ON(mp))
|
|
ASSERT(ip->i_gdquot);
|
|
}
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_qm_dqattach(
|
|
struct xfs_inode *ip,
|
|
uint flags)
|
|
{
|
|
int error;
|
|
|
|
xfs_ilock(ip, XFS_ILOCK_EXCL);
|
|
error = xfs_qm_dqattach_locked(ip, flags);
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Release dquots (and their references) if any.
|
|
* The inode should be locked EXCL except when this's called by
|
|
* xfs_ireclaim.
|
|
*/
|
|
void
|
|
xfs_qm_dqdetach(
|
|
xfs_inode_t *ip)
|
|
{
|
|
if (!(ip->i_udquot || ip->i_gdquot))
|
|
return;
|
|
|
|
trace_xfs_dquot_dqdetach(ip);
|
|
|
|
ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_uquotino);
|
|
ASSERT(ip->i_ino != ip->i_mount->m_sb.sb_gquotino);
|
|
if (ip->i_udquot) {
|
|
xfs_qm_dqrele(ip->i_udquot);
|
|
ip->i_udquot = NULL;
|
|
}
|
|
if (ip->i_gdquot) {
|
|
xfs_qm_dqrele(ip->i_gdquot);
|
|
ip->i_gdquot = NULL;
|
|
}
|
|
}
|
|
|
|
int
|
|
xfs_qm_sync(
|
|
struct xfs_mount *mp,
|
|
int flags)
|
|
{
|
|
struct xfs_quotainfo *q = mp->m_quotainfo;
|
|
int recl, restarts;
|
|
struct xfs_dquot *dqp;
|
|
int error;
|
|
|
|
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
|
|
return 0;
|
|
|
|
restarts = 0;
|
|
|
|
again:
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
/*
|
|
* dqpurge_all() also takes the mplist lock and iterate thru all dquots
|
|
* in quotaoff. However, if the QUOTA_ACTIVE bits are not cleared
|
|
* when we have the mplist lock, we know that dquots will be consistent
|
|
* as long as we have it locked.
|
|
*/
|
|
if (!XFS_IS_QUOTA_ON(mp)) {
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
return 0;
|
|
}
|
|
ASSERT(mutex_is_locked(&q->qi_dqlist_lock));
|
|
list_for_each_entry(dqp, &q->qi_dqlist, q_mplist) {
|
|
/*
|
|
* If this is vfs_sync calling, then skip the dquots that
|
|
* don't 'seem' to be dirty. ie. don't acquire dqlock.
|
|
* This is very similar to what xfs_sync does with inodes.
|
|
*/
|
|
if (flags & SYNC_TRYLOCK) {
|
|
if (!XFS_DQ_IS_DIRTY(dqp))
|
|
continue;
|
|
if (!xfs_qm_dqlock_nowait(dqp))
|
|
continue;
|
|
} else {
|
|
xfs_dqlock(dqp);
|
|
}
|
|
|
|
/*
|
|
* Now, find out for sure if this dquot is dirty or not.
|
|
*/
|
|
if (! XFS_DQ_IS_DIRTY(dqp)) {
|
|
xfs_dqunlock(dqp);
|
|
continue;
|
|
}
|
|
|
|
/* XXX a sentinel would be better */
|
|
recl = q->qi_dqreclaims;
|
|
if (!xfs_dqflock_nowait(dqp)) {
|
|
if (flags & SYNC_TRYLOCK) {
|
|
xfs_dqunlock(dqp);
|
|
continue;
|
|
}
|
|
/*
|
|
* If we can't grab the flush lock then if the caller
|
|
* really wanted us to give this our best shot, so
|
|
* see if we can give a push to the buffer before we wait
|
|
* on the flush lock. At this point, we know that
|
|
* even though the dquot is being flushed,
|
|
* it has (new) dirty data.
|
|
*/
|
|
xfs_qm_dqflock_pushbuf_wait(dqp);
|
|
}
|
|
/*
|
|
* Let go of the mplist lock. We don't want to hold it
|
|
* across a disk write
|
|
*/
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
error = xfs_qm_dqflush(dqp, flags);
|
|
xfs_dqunlock(dqp);
|
|
if (error && XFS_FORCED_SHUTDOWN(mp))
|
|
return 0; /* Need to prevent umount failure */
|
|
else if (error)
|
|
return error;
|
|
|
|
mutex_lock(&q->qi_dqlist_lock);
|
|
if (recl != q->qi_dqreclaims) {
|
|
if (++restarts >= XFS_QM_SYNC_MAX_RESTARTS)
|
|
break;
|
|
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
goto again;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&q->qi_dqlist_lock);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The hash chains and the mplist use the same xfs_dqhash structure as
|
|
* their list head, but we can take the mplist qh_lock and one of the
|
|
* hash qh_locks at the same time without any problem as they aren't
|
|
* related.
|
|
*/
|
|
static struct lock_class_key xfs_quota_mplist_class;
|
|
|
|
/*
|
|
* This initializes all the quota information that's kept in the
|
|
* mount structure
|
|
*/
|
|
STATIC int
|
|
xfs_qm_init_quotainfo(
|
|
xfs_mount_t *mp)
|
|
{
|
|
xfs_quotainfo_t *qinf;
|
|
int error;
|
|
xfs_dquot_t *dqp;
|
|
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
|
|
/*
|
|
* Tell XQM that we exist as soon as possible.
|
|
*/
|
|
if ((error = xfs_qm_hold_quotafs_ref(mp))) {
|
|
return error;
|
|
}
|
|
|
|
qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
|
|
|
|
/*
|
|
* See if quotainodes are setup, and if not, allocate them,
|
|
* and change the superblock accordingly.
|
|
*/
|
|
if ((error = xfs_qm_init_quotainos(mp))) {
|
|
kmem_free(qinf);
|
|
mp->m_quotainfo = NULL;
|
|
return error;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&qinf->qi_dqlist);
|
|
mutex_init(&qinf->qi_dqlist_lock);
|
|
lockdep_set_class(&qinf->qi_dqlist_lock, &xfs_quota_mplist_class);
|
|
|
|
qinf->qi_dqreclaims = 0;
|
|
|
|
/* mutex used to serialize quotaoffs */
|
|
mutex_init(&qinf->qi_quotaofflock);
|
|
|
|
/* Precalc some constants */
|
|
qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
|
|
ASSERT(qinf->qi_dqchunklen);
|
|
qinf->qi_dqperchunk = BBTOB(qinf->qi_dqchunklen);
|
|
do_div(qinf->qi_dqperchunk, sizeof(xfs_dqblk_t));
|
|
|
|
mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
|
|
|
|
/*
|
|
* We try to get the limits from the superuser's limits fields.
|
|
* This is quite hacky, but it is standard quota practice.
|
|
* We look at the USR dquot with id == 0 first, but if user quotas
|
|
* are not enabled we goto the GRP dquot with id == 0.
|
|
* We don't really care to keep separate default limits for user
|
|
* and group quotas, at least not at this point.
|
|
*/
|
|
error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)0,
|
|
XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
|
|
(XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
|
|
XFS_DQ_PROJ),
|
|
XFS_QMOPT_DQSUSER|XFS_QMOPT_DOWARN,
|
|
&dqp);
|
|
if (! error) {
|
|
xfs_disk_dquot_t *ddqp = &dqp->q_core;
|
|
|
|
/*
|
|
* The warnings and timers set the grace period given to
|
|
* a user or group before he or she can not perform any
|
|
* more writing. If it is zero, a default is used.
|
|
*/
|
|
qinf->qi_btimelimit = ddqp->d_btimer ?
|
|
be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
|
|
qinf->qi_itimelimit = ddqp->d_itimer ?
|
|
be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
|
|
qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
|
|
be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
|
|
qinf->qi_bwarnlimit = ddqp->d_bwarns ?
|
|
be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
|
|
qinf->qi_iwarnlimit = ddqp->d_iwarns ?
|
|
be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
|
|
qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
|
|
be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
|
|
qinf->qi_bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
|
|
qinf->qi_bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
|
|
qinf->qi_ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
|
|
qinf->qi_isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
|
|
qinf->qi_rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
|
|
qinf->qi_rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
|
|
|
|
/*
|
|
* We sent the XFS_QMOPT_DQSUSER flag to dqget because
|
|
* we don't want this dquot cached. We haven't done a
|
|
* quotacheck yet, and quotacheck doesn't like incore dquots.
|
|
*/
|
|
xfs_qm_dqdestroy(dqp);
|
|
} else {
|
|
qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
|
|
qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
|
|
qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
|
|
qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
|
|
qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
|
|
qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Gets called when unmounting a filesystem or when all quotas get
|
|
* turned off.
|
|
* This purges the quota inodes, destroys locks and frees itself.
|
|
*/
|
|
void
|
|
xfs_qm_destroy_quotainfo(
|
|
xfs_mount_t *mp)
|
|
{
|
|
xfs_quotainfo_t *qi;
|
|
|
|
qi = mp->m_quotainfo;
|
|
ASSERT(qi != NULL);
|
|
ASSERT(xfs_Gqm != NULL);
|
|
|
|
/*
|
|
* Release the reference that XQM kept, so that we know
|
|
* when the XQM structure should be freed. We cannot assume
|
|
* that xfs_Gqm is non-null after this point.
|
|
*/
|
|
xfs_qm_rele_quotafs_ref(mp);
|
|
|
|
ASSERT(list_empty(&qi->qi_dqlist));
|
|
mutex_destroy(&qi->qi_dqlist_lock);
|
|
|
|
if (qi->qi_uquotaip) {
|
|
IRELE(qi->qi_uquotaip);
|
|
qi->qi_uquotaip = NULL; /* paranoia */
|
|
}
|
|
if (qi->qi_gquotaip) {
|
|
IRELE(qi->qi_gquotaip);
|
|
qi->qi_gquotaip = NULL;
|
|
}
|
|
mutex_destroy(&qi->qi_quotaofflock);
|
|
kmem_free(qi);
|
|
mp->m_quotainfo = NULL;
|
|
}
|
|
|
|
|
|
|
|
/* ------------------- PRIVATE STATIC FUNCTIONS ----------------------- */
|
|
|
|
/* ARGSUSED */
|
|
STATIC void
|
|
xfs_qm_list_init(
|
|
xfs_dqlist_t *list,
|
|
char *str,
|
|
int n)
|
|
{
|
|
mutex_init(&list->qh_lock);
|
|
INIT_LIST_HEAD(&list->qh_list);
|
|
list->qh_version = 0;
|
|
list->qh_nelems = 0;
|
|
}
|
|
|
|
STATIC void
|
|
xfs_qm_list_destroy(
|
|
xfs_dqlist_t *list)
|
|
{
|
|
mutex_destroy(&(list->qh_lock));
|
|
}
|
|
|
|
/*
|
|
* Create an inode and return with a reference already taken, but unlocked
|
|
* This is how we create quota inodes
|
|
*/
|
|
STATIC int
|
|
xfs_qm_qino_alloc(
|
|
xfs_mount_t *mp,
|
|
xfs_inode_t **ip,
|
|
__int64_t sbfields,
|
|
uint flags)
|
|
{
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
int committed;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
|
|
if ((error = xfs_trans_reserve(tp,
|
|
XFS_QM_QINOCREATE_SPACE_RES(mp),
|
|
XFS_CREATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES,
|
|
XFS_CREATE_LOG_COUNT))) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
|
|
error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip, &committed);
|
|
if (error) {
|
|
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES |
|
|
XFS_TRANS_ABORT);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Make the changes in the superblock, and log those too.
|
|
* sbfields arg may contain fields other than *QUOTINO;
|
|
* VERSIONNUM for example.
|
|
*/
|
|
spin_lock(&mp->m_sb_lock);
|
|
if (flags & XFS_QMOPT_SBVERSION) {
|
|
ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
|
|
ASSERT((sbfields & (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
|
|
XFS_SB_GQUOTINO | XFS_SB_QFLAGS)) ==
|
|
(XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
|
|
XFS_SB_GQUOTINO | XFS_SB_QFLAGS));
|
|
|
|
xfs_sb_version_addquota(&mp->m_sb);
|
|
mp->m_sb.sb_uquotino = NULLFSINO;
|
|
mp->m_sb.sb_gquotino = NULLFSINO;
|
|
|
|
/* qflags will get updated _after_ quotacheck */
|
|
mp->m_sb.sb_qflags = 0;
|
|
}
|
|
if (flags & XFS_QMOPT_UQUOTA)
|
|
mp->m_sb.sb_uquotino = (*ip)->i_ino;
|
|
else
|
|
mp->m_sb.sb_gquotino = (*ip)->i_ino;
|
|
spin_unlock(&mp->m_sb_lock);
|
|
xfs_mod_sb(tp, sbfields);
|
|
|
|
if ((error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES))) {
|
|
xfs_alert(mp, "%s failed (error %d)!", __func__, error);
|
|
return error;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
STATIC void
|
|
xfs_qm_reset_dqcounts(
|
|
xfs_mount_t *mp,
|
|
xfs_buf_t *bp,
|
|
xfs_dqid_t id,
|
|
uint type)
|
|
{
|
|
xfs_disk_dquot_t *ddq;
|
|
int j;
|
|
|
|
trace_xfs_reset_dqcounts(bp, _RET_IP_);
|
|
|
|
/*
|
|
* Reset all counters and timers. They'll be
|
|
* started afresh by xfs_qm_quotacheck.
|
|
*/
|
|
#ifdef DEBUG
|
|
j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
|
|
do_div(j, sizeof(xfs_dqblk_t));
|
|
ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
|
|
#endif
|
|
ddq = bp->b_addr;
|
|
for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
|
|
/*
|
|
* Do a sanity check, and if needed, repair the dqblk. Don't
|
|
* output any warnings because it's perfectly possible to
|
|
* find uninitialised dquot blks. See comment in xfs_qm_dqcheck.
|
|
*/
|
|
(void) xfs_qm_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
|
|
"xfs_quotacheck");
|
|
ddq->d_bcount = 0;
|
|
ddq->d_icount = 0;
|
|
ddq->d_rtbcount = 0;
|
|
ddq->d_btimer = 0;
|
|
ddq->d_itimer = 0;
|
|
ddq->d_rtbtimer = 0;
|
|
ddq->d_bwarns = 0;
|
|
ddq->d_iwarns = 0;
|
|
ddq->d_rtbwarns = 0;
|
|
ddq = (xfs_disk_dquot_t *) ((xfs_dqblk_t *)ddq + 1);
|
|
}
|
|
}
|
|
|
|
STATIC int
|
|
xfs_qm_dqiter_bufs(
|
|
xfs_mount_t *mp,
|
|
xfs_dqid_t firstid,
|
|
xfs_fsblock_t bno,
|
|
xfs_filblks_t blkcnt,
|
|
uint flags)
|
|
{
|
|
xfs_buf_t *bp;
|
|
int error;
|
|
int type;
|
|
|
|
ASSERT(blkcnt > 0);
|
|
type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
|
|
(flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
|
|
error = 0;
|
|
|
|
/*
|
|
* Blkcnt arg can be a very big number, and might even be
|
|
* larger than the log itself. So, we have to break it up into
|
|
* manageable-sized transactions.
|
|
* Note that we don't start a permanent transaction here; we might
|
|
* not be able to get a log reservation for the whole thing up front,
|
|
* and we don't really care to either, because we just discard
|
|
* everything if we were to crash in the middle of this loop.
|
|
*/
|
|
while (blkcnt--) {
|
|
error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
|
|
XFS_FSB_TO_DADDR(mp, bno),
|
|
mp->m_quotainfo->qi_dqchunklen, 0, &bp);
|
|
if (error)
|
|
break;
|
|
|
|
xfs_qm_reset_dqcounts(mp, bp, firstid, type);
|
|
xfs_buf_delwri_queue(bp);
|
|
xfs_buf_relse(bp);
|
|
/*
|
|
* goto the next block.
|
|
*/
|
|
bno++;
|
|
firstid += mp->m_quotainfo->qi_dqperchunk;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
|
|
* caller supplied function for every chunk of dquots that we find.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_dqiterate(
|
|
xfs_mount_t *mp,
|
|
xfs_inode_t *qip,
|
|
uint flags)
|
|
{
|
|
xfs_bmbt_irec_t *map;
|
|
int i, nmaps; /* number of map entries */
|
|
int error; /* return value */
|
|
xfs_fileoff_t lblkno;
|
|
xfs_filblks_t maxlblkcnt;
|
|
xfs_dqid_t firstid;
|
|
xfs_fsblock_t rablkno;
|
|
xfs_filblks_t rablkcnt;
|
|
|
|
error = 0;
|
|
/*
|
|
* This looks racy, but we can't keep an inode lock across a
|
|
* trans_reserve. But, this gets called during quotacheck, and that
|
|
* happens only at mount time which is single threaded.
|
|
*/
|
|
if (qip->i_d.di_nblocks == 0)
|
|
return 0;
|
|
|
|
map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
|
|
|
|
lblkno = 0;
|
|
maxlblkcnt = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp));
|
|
do {
|
|
nmaps = XFS_DQITER_MAP_SIZE;
|
|
/*
|
|
* We aren't changing the inode itself. Just changing
|
|
* some of its data. No new blocks are added here, and
|
|
* the inode is never added to the transaction.
|
|
*/
|
|
xfs_ilock(qip, XFS_ILOCK_SHARED);
|
|
error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
|
|
map, &nmaps, 0);
|
|
xfs_iunlock(qip, XFS_ILOCK_SHARED);
|
|
if (error)
|
|
break;
|
|
|
|
ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
|
|
for (i = 0; i < nmaps; i++) {
|
|
ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
|
|
ASSERT(map[i].br_blockcount);
|
|
|
|
|
|
lblkno += map[i].br_blockcount;
|
|
|
|
if (map[i].br_startblock == HOLESTARTBLOCK)
|
|
continue;
|
|
|
|
firstid = (xfs_dqid_t) map[i].br_startoff *
|
|
mp->m_quotainfo->qi_dqperchunk;
|
|
/*
|
|
* Do a read-ahead on the next extent.
|
|
*/
|
|
if ((i+1 < nmaps) &&
|
|
(map[i+1].br_startblock != HOLESTARTBLOCK)) {
|
|
rablkcnt = map[i+1].br_blockcount;
|
|
rablkno = map[i+1].br_startblock;
|
|
while (rablkcnt--) {
|
|
xfs_buf_readahead(mp->m_ddev_targp,
|
|
XFS_FSB_TO_DADDR(mp, rablkno),
|
|
mp->m_quotainfo->qi_dqchunklen);
|
|
rablkno++;
|
|
}
|
|
}
|
|
/*
|
|
* Iterate thru all the blks in the extent and
|
|
* reset the counters of all the dquots inside them.
|
|
*/
|
|
if ((error = xfs_qm_dqiter_bufs(mp,
|
|
firstid,
|
|
map[i].br_startblock,
|
|
map[i].br_blockcount,
|
|
flags))) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (error)
|
|
break;
|
|
} while (nmaps > 0);
|
|
|
|
kmem_free(map);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Called by dqusage_adjust in doing a quotacheck.
|
|
*
|
|
* Given the inode, and a dquot id this updates both the incore dqout as well
|
|
* as the buffer copy. This is so that once the quotacheck is done, we can
|
|
* just log all the buffers, as opposed to logging numerous updates to
|
|
* individual dquots.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_quotacheck_dqadjust(
|
|
struct xfs_inode *ip,
|
|
xfs_dqid_t id,
|
|
uint type,
|
|
xfs_qcnt_t nblks,
|
|
xfs_qcnt_t rtblks)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_dquot *dqp;
|
|
int error;
|
|
|
|
error = xfs_qm_dqget(mp, ip, id, type,
|
|
XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
|
|
if (error) {
|
|
/*
|
|
* Shouldn't be able to turn off quotas here.
|
|
*/
|
|
ASSERT(error != ESRCH);
|
|
ASSERT(error != ENOENT);
|
|
return error;
|
|
}
|
|
|
|
trace_xfs_dqadjust(dqp);
|
|
|
|
/*
|
|
* Adjust the inode count and the block count to reflect this inode's
|
|
* resource usage.
|
|
*/
|
|
be64_add_cpu(&dqp->q_core.d_icount, 1);
|
|
dqp->q_res_icount++;
|
|
if (nblks) {
|
|
be64_add_cpu(&dqp->q_core.d_bcount, nblks);
|
|
dqp->q_res_bcount += nblks;
|
|
}
|
|
if (rtblks) {
|
|
be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
|
|
dqp->q_res_rtbcount += rtblks;
|
|
}
|
|
|
|
/*
|
|
* Set default limits, adjust timers (since we changed usages)
|
|
*
|
|
* There are no timers for the default values set in the root dquot.
|
|
*/
|
|
if (dqp->q_core.d_id) {
|
|
xfs_qm_adjust_dqlimits(mp, &dqp->q_core);
|
|
xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
|
|
}
|
|
|
|
dqp->dq_flags |= XFS_DQ_DIRTY;
|
|
xfs_qm_dqput(dqp);
|
|
return 0;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_qm_get_rtblks(
|
|
xfs_inode_t *ip,
|
|
xfs_qcnt_t *O_rtblks)
|
|
{
|
|
xfs_filblks_t rtblks; /* total rt blks */
|
|
xfs_extnum_t idx; /* extent record index */
|
|
xfs_ifork_t *ifp; /* inode fork pointer */
|
|
xfs_extnum_t nextents; /* number of extent entries */
|
|
int error;
|
|
|
|
ASSERT(XFS_IS_REALTIME_INODE(ip));
|
|
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
|
|
if (!(ifp->if_flags & XFS_IFEXTENTS)) {
|
|
if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
|
|
return error;
|
|
}
|
|
rtblks = 0;
|
|
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
|
|
for (idx = 0; idx < nextents; idx++)
|
|
rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
|
|
*O_rtblks = (xfs_qcnt_t)rtblks;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* callback routine supplied to bulkstat(). Given an inumber, find its
|
|
* dquots and update them to account for resources taken by that inode.
|
|
*/
|
|
/* ARGSUSED */
|
|
STATIC int
|
|
xfs_qm_dqusage_adjust(
|
|
xfs_mount_t *mp, /* mount point for filesystem */
|
|
xfs_ino_t ino, /* inode number to get data for */
|
|
void __user *buffer, /* not used */
|
|
int ubsize, /* not used */
|
|
int *ubused, /* not used */
|
|
int *res) /* result code value */
|
|
{
|
|
xfs_inode_t *ip;
|
|
xfs_qcnt_t nblks, rtblks = 0;
|
|
int error;
|
|
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
|
|
/*
|
|
* rootino must have its resources accounted for, not so with the quota
|
|
* inodes.
|
|
*/
|
|
if (ino == mp->m_sb.sb_uquotino || ino == mp->m_sb.sb_gquotino) {
|
|
*res = BULKSTAT_RV_NOTHING;
|
|
return XFS_ERROR(EINVAL);
|
|
}
|
|
|
|
/*
|
|
* We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
|
|
* interface expects the inode to be exclusively locked because that's
|
|
* the case in all other instances. It's OK that we do this because
|
|
* quotacheck is done only at mount time.
|
|
*/
|
|
error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
|
|
if (error) {
|
|
*res = BULKSTAT_RV_NOTHING;
|
|
return error;
|
|
}
|
|
|
|
ASSERT(ip->i_delayed_blks == 0);
|
|
|
|
if (XFS_IS_REALTIME_INODE(ip)) {
|
|
/*
|
|
* Walk thru the extent list and count the realtime blocks.
|
|
*/
|
|
error = xfs_qm_get_rtblks(ip, &rtblks);
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
|
|
nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
|
|
|
|
/*
|
|
* Add the (disk blocks and inode) resources occupied by this
|
|
* inode to its dquots. We do this adjustment in the incore dquot,
|
|
* and also copy the changes to its buffer.
|
|
* We don't care about putting these changes in a transaction
|
|
* envelope because if we crash in the middle of a 'quotacheck'
|
|
* we have to start from the beginning anyway.
|
|
* Once we're done, we'll log all the dquot bufs.
|
|
*
|
|
* The *QUOTA_ON checks below may look pretty racy, but quotachecks
|
|
* and quotaoffs don't race. (Quotachecks happen at mount time only).
|
|
*/
|
|
if (XFS_IS_UQUOTA_ON(mp)) {
|
|
error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
|
|
XFS_DQ_USER, nblks, rtblks);
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
|
|
if (XFS_IS_GQUOTA_ON(mp)) {
|
|
error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
|
|
XFS_DQ_GROUP, nblks, rtblks);
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
|
|
if (XFS_IS_PQUOTA_ON(mp)) {
|
|
error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
|
|
XFS_DQ_PROJ, nblks, rtblks);
|
|
if (error)
|
|
goto error0;
|
|
}
|
|
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
IRELE(ip);
|
|
*res = BULKSTAT_RV_DIDONE;
|
|
return 0;
|
|
|
|
error0:
|
|
xfs_iunlock(ip, XFS_ILOCK_EXCL);
|
|
IRELE(ip);
|
|
*res = BULKSTAT_RV_GIVEUP;
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Walk thru all the filesystem inodes and construct a consistent view
|
|
* of the disk quota world. If the quotacheck fails, disable quotas.
|
|
*/
|
|
int
|
|
xfs_qm_quotacheck(
|
|
xfs_mount_t *mp)
|
|
{
|
|
int done, count, error;
|
|
xfs_ino_t lastino;
|
|
size_t structsz;
|
|
xfs_inode_t *uip, *gip;
|
|
uint flags;
|
|
|
|
count = INT_MAX;
|
|
structsz = 1;
|
|
lastino = 0;
|
|
flags = 0;
|
|
|
|
ASSERT(mp->m_quotainfo->qi_uquotaip || mp->m_quotainfo->qi_gquotaip);
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
|
|
/*
|
|
* There should be no cached dquots. The (simplistic) quotacheck
|
|
* algorithm doesn't like that.
|
|
*/
|
|
ASSERT(list_empty(&mp->m_quotainfo->qi_dqlist));
|
|
|
|
xfs_notice(mp, "Quotacheck needed: Please wait.");
|
|
|
|
/*
|
|
* First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
|
|
* their counters to zero. We need a clean slate.
|
|
* We don't log our changes till later.
|
|
*/
|
|
uip = mp->m_quotainfo->qi_uquotaip;
|
|
if (uip) {
|
|
error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA);
|
|
if (error)
|
|
goto error_return;
|
|
flags |= XFS_UQUOTA_CHKD;
|
|
}
|
|
|
|
gip = mp->m_quotainfo->qi_gquotaip;
|
|
if (gip) {
|
|
error = xfs_qm_dqiterate(mp, gip, XFS_IS_GQUOTA_ON(mp) ?
|
|
XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
|
|
if (error)
|
|
goto error_return;
|
|
flags |= XFS_OQUOTA_CHKD;
|
|
}
|
|
|
|
do {
|
|
/*
|
|
* Iterate thru all the inodes in the file system,
|
|
* adjusting the corresponding dquot counters in core.
|
|
*/
|
|
error = xfs_bulkstat(mp, &lastino, &count,
|
|
xfs_qm_dqusage_adjust,
|
|
structsz, NULL, &done);
|
|
if (error)
|
|
break;
|
|
|
|
} while (!done);
|
|
|
|
/*
|
|
* We've made all the changes that we need to make incore.
|
|
* Flush them down to disk buffers if everything was updated
|
|
* successfully.
|
|
*/
|
|
if (!error)
|
|
error = xfs_qm_dqflush_all(mp, 0);
|
|
|
|
/*
|
|
* We can get this error if we couldn't do a dquot allocation inside
|
|
* xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
|
|
* dirty dquots that might be cached, we just want to get rid of them
|
|
* and turn quotaoff. The dquots won't be attached to any of the inodes
|
|
* at this point (because we intentionally didn't in dqget_noattach).
|
|
*/
|
|
if (error) {
|
|
xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
|
|
goto error_return;
|
|
}
|
|
|
|
/*
|
|
* We didn't log anything, because if we crashed, we'll have to
|
|
* start the quotacheck from scratch anyway. However, we must make
|
|
* sure that our dquot changes are secure before we put the
|
|
* quotacheck'd stamp on the superblock. So, here we do a synchronous
|
|
* flush.
|
|
*/
|
|
xfs_flush_buftarg(mp->m_ddev_targp, 1);
|
|
|
|
/*
|
|
* If one type of quotas is off, then it will lose its
|
|
* quotachecked status, since we won't be doing accounting for
|
|
* that type anymore.
|
|
*/
|
|
mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
|
|
mp->m_qflags |= flags;
|
|
|
|
error_return:
|
|
if (error) {
|
|
xfs_warn(mp,
|
|
"Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
|
|
error);
|
|
/*
|
|
* We must turn off quotas.
|
|
*/
|
|
ASSERT(mp->m_quotainfo != NULL);
|
|
ASSERT(xfs_Gqm != NULL);
|
|
xfs_qm_destroy_quotainfo(mp);
|
|
if (xfs_mount_reset_sbqflags(mp)) {
|
|
xfs_warn(mp,
|
|
"Quotacheck: Failed to reset quota flags.");
|
|
}
|
|
} else
|
|
xfs_notice(mp, "Quotacheck: Done.");
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This is called after the superblock has been read in and we're ready to
|
|
* iget the quota inodes.
|
|
*/
|
|
STATIC int
|
|
xfs_qm_init_quotainos(
|
|
xfs_mount_t *mp)
|
|
{
|
|
xfs_inode_t *uip, *gip;
|
|
int error;
|
|
__int64_t sbflags;
|
|
uint flags;
|
|
|
|
ASSERT(mp->m_quotainfo);
|
|
uip = gip = NULL;
|
|
sbflags = 0;
|
|
flags = 0;
|
|
|
|
/*
|
|
* Get the uquota and gquota inodes
|
|
*/
|
|
if (xfs_sb_version_hasquota(&mp->m_sb)) {
|
|
if (XFS_IS_UQUOTA_ON(mp) &&
|
|
mp->m_sb.sb_uquotino != NULLFSINO) {
|
|
ASSERT(mp->m_sb.sb_uquotino > 0);
|
|
if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
|
|
0, 0, &uip)))
|
|
return XFS_ERROR(error);
|
|
}
|
|
if (XFS_IS_OQUOTA_ON(mp) &&
|
|
mp->m_sb.sb_gquotino != NULLFSINO) {
|
|
ASSERT(mp->m_sb.sb_gquotino > 0);
|
|
if ((error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
|
|
0, 0, &gip))) {
|
|
if (uip)
|
|
IRELE(uip);
|
|
return XFS_ERROR(error);
|
|
}
|
|
}
|
|
} else {
|
|
flags |= XFS_QMOPT_SBVERSION;
|
|
sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
|
|
XFS_SB_GQUOTINO | XFS_SB_QFLAGS);
|
|
}
|
|
|
|
/*
|
|
* Create the two inodes, if they don't exist already. The changes
|
|
* made above will get added to a transaction and logged in one of
|
|
* the qino_alloc calls below. If the device is readonly,
|
|
* temporarily switch to read-write to do this.
|
|
*/
|
|
if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
|
|
if ((error = xfs_qm_qino_alloc(mp, &uip,
|
|
sbflags | XFS_SB_UQUOTINO,
|
|
flags | XFS_QMOPT_UQUOTA)))
|
|
return XFS_ERROR(error);
|
|
|
|
flags &= ~XFS_QMOPT_SBVERSION;
|
|
}
|
|
if (XFS_IS_OQUOTA_ON(mp) && gip == NULL) {
|
|
flags |= (XFS_IS_GQUOTA_ON(mp) ?
|
|
XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
|
|
error = xfs_qm_qino_alloc(mp, &gip,
|
|
sbflags | XFS_SB_GQUOTINO, flags);
|
|
if (error) {
|
|
if (uip)
|
|
IRELE(uip);
|
|
|
|
return XFS_ERROR(error);
|
|
}
|
|
}
|
|
|
|
mp->m_quotainfo->qi_uquotaip = uip;
|
|
mp->m_quotainfo->qi_gquotaip = gip;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* Just pop the least recently used dquot off the freelist and
|
|
* recycle it. The returned dquot is locked.
|
|
*/
|
|
STATIC xfs_dquot_t *
|
|
xfs_qm_dqreclaim_one(void)
|
|
{
|
|
xfs_dquot_t *dqpout;
|
|
xfs_dquot_t *dqp;
|
|
int restarts;
|
|
int startagain;
|
|
|
|
restarts = 0;
|
|
dqpout = NULL;
|
|
|
|
/* lockorder: hashchainlock, freelistlock, mplistlock, dqlock, dqflock */
|
|
again:
|
|
startagain = 0;
|
|
mutex_lock(&xfs_Gqm->qm_dqfrlist_lock);
|
|
|
|
list_for_each_entry(dqp, &xfs_Gqm->qm_dqfrlist, q_freelist) {
|
|
struct xfs_mount *mp = dqp->q_mount;
|
|
xfs_dqlock(dqp);
|
|
|
|
/*
|
|
* We are racing with dqlookup here. Naturally we don't
|
|
* want to reclaim a dquot that lookup wants. We release the
|
|
* freelist lock and start over, so that lookup will grab
|
|
* both the dquot and the freelistlock.
|
|
*/
|
|
if (dqp->dq_flags & XFS_DQ_WANT) {
|
|
ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
|
|
|
|
trace_xfs_dqreclaim_want(dqp);
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqwants);
|
|
restarts++;
|
|
startagain = 1;
|
|
goto dqunlock;
|
|
}
|
|
|
|
/*
|
|
* If the dquot is inactive, we are assured that it is
|
|
* not on the mplist or the hashlist, and that makes our
|
|
* life easier.
|
|
*/
|
|
if (dqp->dq_flags & XFS_DQ_INACTIVE) {
|
|
ASSERT(mp == NULL);
|
|
ASSERT(! XFS_DQ_IS_DIRTY(dqp));
|
|
ASSERT(list_empty(&dqp->q_hashlist));
|
|
ASSERT(list_empty(&dqp->q_mplist));
|
|
list_del_init(&dqp->q_freelist);
|
|
xfs_Gqm->qm_dqfrlist_cnt--;
|
|
dqpout = dqp;
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
|
|
goto dqunlock;
|
|
}
|
|
|
|
ASSERT(dqp->q_hash);
|
|
ASSERT(!list_empty(&dqp->q_mplist));
|
|
|
|
/*
|
|
* Try to grab the flush lock. If this dquot is in the process
|
|
* of getting flushed to disk, we don't want to reclaim it.
|
|
*/
|
|
if (!xfs_dqflock_nowait(dqp))
|
|
goto dqunlock;
|
|
|
|
/*
|
|
* We have the flush lock so we know that this is not in the
|
|
* process of being flushed. So, if this is dirty, flush it
|
|
* DELWRI so that we don't get a freelist infested with
|
|
* dirty dquots.
|
|
*/
|
|
if (XFS_DQ_IS_DIRTY(dqp)) {
|
|
int error;
|
|
|
|
trace_xfs_dqreclaim_dirty(dqp);
|
|
|
|
/*
|
|
* We flush it delayed write, so don't bother
|
|
* releasing the freelist lock.
|
|
*/
|
|
error = xfs_qm_dqflush(dqp, 0);
|
|
if (error) {
|
|
xfs_warn(mp, "%s: dquot %p flush failed",
|
|
__func__, dqp);
|
|
}
|
|
goto dqunlock;
|
|
}
|
|
|
|
/*
|
|
* We're trying to get the hashlock out of order. This races
|
|
* with dqlookup; so, we giveup and goto the next dquot if
|
|
* we couldn't get the hashlock. This way, we won't starve
|
|
* a dqlookup process that holds the hashlock that is
|
|
* waiting for the freelist lock.
|
|
*/
|
|
if (!mutex_trylock(&dqp->q_hash->qh_lock)) {
|
|
restarts++;
|
|
goto dqfunlock;
|
|
}
|
|
|
|
/*
|
|
* This races with dquot allocation code as well as dqflush_all
|
|
* and reclaim code. So, if we failed to grab the mplist lock,
|
|
* giveup everything and start over.
|
|
*/
|
|
if (!mutex_trylock(&mp->m_quotainfo->qi_dqlist_lock)) {
|
|
restarts++;
|
|
startagain = 1;
|
|
goto qhunlock;
|
|
}
|
|
|
|
ASSERT(dqp->q_nrefs == 0);
|
|
list_del_init(&dqp->q_mplist);
|
|
mp->m_quotainfo->qi_dquots--;
|
|
mp->m_quotainfo->qi_dqreclaims++;
|
|
list_del_init(&dqp->q_hashlist);
|
|
dqp->q_hash->qh_version++;
|
|
list_del_init(&dqp->q_freelist);
|
|
xfs_Gqm->qm_dqfrlist_cnt--;
|
|
dqpout = dqp;
|
|
mutex_unlock(&mp->m_quotainfo->qi_dqlist_lock);
|
|
qhunlock:
|
|
mutex_unlock(&dqp->q_hash->qh_lock);
|
|
dqfunlock:
|
|
xfs_dqfunlock(dqp);
|
|
dqunlock:
|
|
xfs_dqunlock(dqp);
|
|
if (dqpout)
|
|
break;
|
|
if (restarts >= XFS_QM_RECLAIM_MAX_RESTARTS)
|
|
break;
|
|
if (startagain) {
|
|
mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
|
|
goto again;
|
|
}
|
|
}
|
|
mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
|
|
return dqpout;
|
|
}
|
|
|
|
/*
|
|
* Traverse the freelist of dquots and attempt to reclaim a maximum of
|
|
* 'howmany' dquots. This operation races with dqlookup(), and attempts to
|
|
* favor the lookup function ...
|
|
*/
|
|
STATIC int
|
|
xfs_qm_shake_freelist(
|
|
int howmany)
|
|
{
|
|
int nreclaimed = 0;
|
|
xfs_dquot_t *dqp;
|
|
|
|
if (howmany <= 0)
|
|
return 0;
|
|
|
|
while (nreclaimed < howmany) {
|
|
dqp = xfs_qm_dqreclaim_one();
|
|
if (!dqp)
|
|
return nreclaimed;
|
|
xfs_qm_dqdestroy(dqp);
|
|
nreclaimed++;
|
|
}
|
|
return nreclaimed;
|
|
}
|
|
|
|
/*
|
|
* The kmem_shake interface is invoked when memory is running low.
|
|
*/
|
|
/* ARGSUSED */
|
|
STATIC int
|
|
xfs_qm_shake(
|
|
struct shrinker *shrink,
|
|
struct shrink_control *sc)
|
|
{
|
|
int ndqused, nfree, n;
|
|
gfp_t gfp_mask = sc->gfp_mask;
|
|
|
|
if (!kmem_shake_allow(gfp_mask))
|
|
return 0;
|
|
if (!xfs_Gqm)
|
|
return 0;
|
|
|
|
nfree = xfs_Gqm->qm_dqfrlist_cnt; /* free dquots */
|
|
/* incore dquots in all f/s's */
|
|
ndqused = atomic_read(&xfs_Gqm->qm_totaldquots) - nfree;
|
|
|
|
ASSERT(ndqused >= 0);
|
|
|
|
if (nfree <= ndqused && nfree < ndquot)
|
|
return 0;
|
|
|
|
ndqused *= xfs_Gqm->qm_dqfree_ratio; /* target # of free dquots */
|
|
n = nfree - ndqused - ndquot; /* # over target */
|
|
|
|
return xfs_qm_shake_freelist(MAX(nfree, n));
|
|
}
|
|
|
|
|
|
/*------------------------------------------------------------------*/
|
|
|
|
/*
|
|
* Return a new incore dquot. Depending on the number of
|
|
* dquots in the system, we either allocate a new one on the kernel heap,
|
|
* or reclaim a free one.
|
|
* Return value is B_TRUE if we allocated a new dquot, B_FALSE if we managed
|
|
* to reclaim an existing one from the freelist.
|
|
*/
|
|
boolean_t
|
|
xfs_qm_dqalloc_incore(
|
|
xfs_dquot_t **O_dqpp)
|
|
{
|
|
xfs_dquot_t *dqp;
|
|
|
|
/*
|
|
* Check against high water mark to see if we want to pop
|
|
* a nincompoop dquot off the freelist.
|
|
*/
|
|
if (atomic_read(&xfs_Gqm->qm_totaldquots) >= ndquot) {
|
|
/*
|
|
* Try to recycle a dquot from the freelist.
|
|
*/
|
|
if ((dqp = xfs_qm_dqreclaim_one())) {
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqreclaims);
|
|
/*
|
|
* Just zero the core here. The rest will get
|
|
* reinitialized by caller. XXX we shouldn't even
|
|
* do this zero ...
|
|
*/
|
|
memset(&dqp->q_core, 0, sizeof(dqp->q_core));
|
|
*O_dqpp = dqp;
|
|
return B_FALSE;
|
|
}
|
|
XQM_STATS_INC(xqmstats.xs_qm_dqreclaim_misses);
|
|
}
|
|
|
|
/*
|
|
* Allocate a brand new dquot on the kernel heap and return it
|
|
* to the caller to initialize.
|
|
*/
|
|
ASSERT(xfs_Gqm->qm_dqzone != NULL);
|
|
*O_dqpp = kmem_zone_zalloc(xfs_Gqm->qm_dqzone, KM_SLEEP);
|
|
atomic_inc(&xfs_Gqm->qm_totaldquots);
|
|
|
|
return B_TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Start a transaction and write the incore superblock changes to
|
|
* disk. flags parameter indicates which fields have changed.
|
|
*/
|
|
int
|
|
xfs_qm_write_sb_changes(
|
|
xfs_mount_t *mp,
|
|
__int64_t flags)
|
|
{
|
|
xfs_trans_t *tp;
|
|
int error;
|
|
|
|
tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
|
|
if ((error = xfs_trans_reserve(tp, 0,
|
|
mp->m_sb.sb_sectsize + 128, 0,
|
|
0,
|
|
XFS_DEFAULT_LOG_COUNT))) {
|
|
xfs_trans_cancel(tp, 0);
|
|
return error;
|
|
}
|
|
|
|
xfs_mod_sb(tp, flags);
|
|
error = xfs_trans_commit(tp, 0);
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/* --------------- utility functions for vnodeops ---------------- */
|
|
|
|
|
|
/*
|
|
* Given an inode, a uid, gid and prid make sure that we have
|
|
* allocated relevant dquot(s) on disk, and that we won't exceed inode
|
|
* quotas by creating this file.
|
|
* This also attaches dquot(s) to the given inode after locking it,
|
|
* and returns the dquots corresponding to the uid and/or gid.
|
|
*
|
|
* in : inode (unlocked)
|
|
* out : udquot, gdquot with references taken and unlocked
|
|
*/
|
|
int
|
|
xfs_qm_vop_dqalloc(
|
|
struct xfs_inode *ip,
|
|
uid_t uid,
|
|
gid_t gid,
|
|
prid_t prid,
|
|
uint flags,
|
|
struct xfs_dquot **O_udqpp,
|
|
struct xfs_dquot **O_gdqpp)
|
|
{
|
|
struct xfs_mount *mp = ip->i_mount;
|
|
struct xfs_dquot *uq, *gq;
|
|
int error;
|
|
uint lockflags;
|
|
|
|
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
|
|
return 0;
|
|
|
|
lockflags = XFS_ILOCK_EXCL;
|
|
xfs_ilock(ip, lockflags);
|
|
|
|
if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
|
|
gid = ip->i_d.di_gid;
|
|
|
|
/*
|
|
* Attach the dquot(s) to this inode, doing a dquot allocation
|
|
* if necessary. The dquot(s) will not be locked.
|
|
*/
|
|
if (XFS_NOT_DQATTACHED(mp, ip)) {
|
|
error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
|
|
if (error) {
|
|
xfs_iunlock(ip, lockflags);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
uq = gq = NULL;
|
|
if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
|
|
if (ip->i_d.di_uid != uid) {
|
|
/*
|
|
* What we need is the dquot that has this uid, and
|
|
* if we send the inode to dqget, the uid of the inode
|
|
* takes priority over what's sent in the uid argument.
|
|
* We must unlock inode here before calling dqget if
|
|
* we're not sending the inode, because otherwise
|
|
* we'll deadlock by doing trans_reserve while
|
|
* holding ilock.
|
|
*/
|
|
xfs_iunlock(ip, lockflags);
|
|
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid,
|
|
XFS_DQ_USER,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&uq))) {
|
|
ASSERT(error != ENOENT);
|
|
return error;
|
|
}
|
|
/*
|
|
* Get the ilock in the right order.
|
|
*/
|
|
xfs_dqunlock(uq);
|
|
lockflags = XFS_ILOCK_SHARED;
|
|
xfs_ilock(ip, lockflags);
|
|
} else {
|
|
/*
|
|
* Take an extra reference, because we'll return
|
|
* this to caller
|
|
*/
|
|
ASSERT(ip->i_udquot);
|
|
uq = ip->i_udquot;
|
|
xfs_dqlock(uq);
|
|
XFS_DQHOLD(uq);
|
|
xfs_dqunlock(uq);
|
|
}
|
|
}
|
|
if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
|
|
if (ip->i_d.di_gid != gid) {
|
|
xfs_iunlock(ip, lockflags);
|
|
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid,
|
|
XFS_DQ_GROUP,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&gq))) {
|
|
if (uq)
|
|
xfs_qm_dqrele(uq);
|
|
ASSERT(error != ENOENT);
|
|
return error;
|
|
}
|
|
xfs_dqunlock(gq);
|
|
lockflags = XFS_ILOCK_SHARED;
|
|
xfs_ilock(ip, lockflags);
|
|
} else {
|
|
ASSERT(ip->i_gdquot);
|
|
gq = ip->i_gdquot;
|
|
xfs_dqlock(gq);
|
|
XFS_DQHOLD(gq);
|
|
xfs_dqunlock(gq);
|
|
}
|
|
} else if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
|
|
if (xfs_get_projid(ip) != prid) {
|
|
xfs_iunlock(ip, lockflags);
|
|
if ((error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
|
|
XFS_DQ_PROJ,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&gq))) {
|
|
if (uq)
|
|
xfs_qm_dqrele(uq);
|
|
ASSERT(error != ENOENT);
|
|
return (error);
|
|
}
|
|
xfs_dqunlock(gq);
|
|
lockflags = XFS_ILOCK_SHARED;
|
|
xfs_ilock(ip, lockflags);
|
|
} else {
|
|
ASSERT(ip->i_gdquot);
|
|
gq = ip->i_gdquot;
|
|
xfs_dqlock(gq);
|
|
XFS_DQHOLD(gq);
|
|
xfs_dqunlock(gq);
|
|
}
|
|
}
|
|
if (uq)
|
|
trace_xfs_dquot_dqalloc(ip);
|
|
|
|
xfs_iunlock(ip, lockflags);
|
|
if (O_udqpp)
|
|
*O_udqpp = uq;
|
|
else if (uq)
|
|
xfs_qm_dqrele(uq);
|
|
if (O_gdqpp)
|
|
*O_gdqpp = gq;
|
|
else if (gq)
|
|
xfs_qm_dqrele(gq);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Actually transfer ownership, and do dquot modifications.
|
|
* These were already reserved.
|
|
*/
|
|
xfs_dquot_t *
|
|
xfs_qm_vop_chown(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip,
|
|
xfs_dquot_t **IO_olddq,
|
|
xfs_dquot_t *newdq)
|
|
{
|
|
xfs_dquot_t *prevdq;
|
|
uint bfield = XFS_IS_REALTIME_INODE(ip) ?
|
|
XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
|
|
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
|
|
|
|
/* old dquot */
|
|
prevdq = *IO_olddq;
|
|
ASSERT(prevdq);
|
|
ASSERT(prevdq != newdq);
|
|
|
|
xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
|
|
xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
|
|
|
|
/* the sparkling new dquot */
|
|
xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
|
|
xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
|
|
|
|
/*
|
|
* Take an extra reference, because the inode
|
|
* is going to keep this dquot pointer even
|
|
* after the trans_commit.
|
|
*/
|
|
xfs_dqlock(newdq);
|
|
XFS_DQHOLD(newdq);
|
|
xfs_dqunlock(newdq);
|
|
*IO_olddq = newdq;
|
|
|
|
return prevdq;
|
|
}
|
|
|
|
/*
|
|
* Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
|
|
*/
|
|
int
|
|
xfs_qm_vop_chown_reserve(
|
|
xfs_trans_t *tp,
|
|
xfs_inode_t *ip,
|
|
xfs_dquot_t *udqp,
|
|
xfs_dquot_t *gdqp,
|
|
uint flags)
|
|
{
|
|
xfs_mount_t *mp = ip->i_mount;
|
|
uint delblks, blkflags, prjflags = 0;
|
|
xfs_dquot_t *unresudq, *unresgdq, *delblksudq, *delblksgdq;
|
|
int error;
|
|
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
|
|
delblks = ip->i_delayed_blks;
|
|
delblksudq = delblksgdq = unresudq = unresgdq = NULL;
|
|
blkflags = XFS_IS_REALTIME_INODE(ip) ?
|
|
XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
|
|
|
|
if (XFS_IS_UQUOTA_ON(mp) && udqp &&
|
|
ip->i_d.di_uid != (uid_t)be32_to_cpu(udqp->q_core.d_id)) {
|
|
delblksudq = udqp;
|
|
/*
|
|
* If there are delayed allocation blocks, then we have to
|
|
* unreserve those from the old dquot, and add them to the
|
|
* new dquot.
|
|
*/
|
|
if (delblks) {
|
|
ASSERT(ip->i_udquot);
|
|
unresudq = ip->i_udquot;
|
|
}
|
|
}
|
|
if (XFS_IS_OQUOTA_ON(ip->i_mount) && gdqp) {
|
|
if (XFS_IS_PQUOTA_ON(ip->i_mount) &&
|
|
xfs_get_projid(ip) != be32_to_cpu(gdqp->q_core.d_id))
|
|
prjflags = XFS_QMOPT_ENOSPC;
|
|
|
|
if (prjflags ||
|
|
(XFS_IS_GQUOTA_ON(ip->i_mount) &&
|
|
ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id))) {
|
|
delblksgdq = gdqp;
|
|
if (delblks) {
|
|
ASSERT(ip->i_gdquot);
|
|
unresgdq = ip->i_gdquot;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
|
|
delblksudq, delblksgdq, ip->i_d.di_nblocks, 1,
|
|
flags | blkflags | prjflags)))
|
|
return (error);
|
|
|
|
/*
|
|
* Do the delayed blks reservations/unreservations now. Since, these
|
|
* are done without the help of a transaction, if a reservation fails
|
|
* its previous reservations won't be automatically undone by trans
|
|
* code. So, we have to do it manually here.
|
|
*/
|
|
if (delblks) {
|
|
/*
|
|
* Do the reservations first. Unreservation can't fail.
|
|
*/
|
|
ASSERT(delblksudq || delblksgdq);
|
|
ASSERT(unresudq || unresgdq);
|
|
if ((error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
|
|
delblksudq, delblksgdq, (xfs_qcnt_t)delblks, 0,
|
|
flags | blkflags | prjflags)))
|
|
return (error);
|
|
xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
|
|
unresudq, unresgdq, -((xfs_qcnt_t)delblks), 0,
|
|
blkflags);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
xfs_qm_vop_rename_dqattach(
|
|
struct xfs_inode **i_tab)
|
|
{
|
|
struct xfs_mount *mp = i_tab[0]->i_mount;
|
|
int i;
|
|
|
|
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
|
|
return 0;
|
|
|
|
for (i = 0; (i < 4 && i_tab[i]); i++) {
|
|
struct xfs_inode *ip = i_tab[i];
|
|
int error;
|
|
|
|
/*
|
|
* Watch out for duplicate entries in the table.
|
|
*/
|
|
if (i == 0 || ip != i_tab[i-1]) {
|
|
if (XFS_NOT_DQATTACHED(mp, ip)) {
|
|
error = xfs_qm_dqattach(ip, 0);
|
|
if (error)
|
|
return error;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
xfs_qm_vop_create_dqattach(
|
|
struct xfs_trans *tp,
|
|
struct xfs_inode *ip,
|
|
struct xfs_dquot *udqp,
|
|
struct xfs_dquot *gdqp)
|
|
{
|
|
struct xfs_mount *mp = tp->t_mountp;
|
|
|
|
if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
|
|
return;
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(XFS_IS_QUOTA_RUNNING(mp));
|
|
|
|
if (udqp) {
|
|
xfs_dqlock(udqp);
|
|
XFS_DQHOLD(udqp);
|
|
xfs_dqunlock(udqp);
|
|
ASSERT(ip->i_udquot == NULL);
|
|
ip->i_udquot = udqp;
|
|
ASSERT(XFS_IS_UQUOTA_ON(mp));
|
|
ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
|
|
xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
|
|
}
|
|
if (gdqp) {
|
|
xfs_dqlock(gdqp);
|
|
XFS_DQHOLD(gdqp);
|
|
xfs_dqunlock(gdqp);
|
|
ASSERT(ip->i_gdquot == NULL);
|
|
ip->i_gdquot = gdqp;
|
|
ASSERT(XFS_IS_OQUOTA_ON(mp));
|
|
ASSERT((XFS_IS_GQUOTA_ON(mp) ?
|
|
ip->i_d.di_gid : xfs_get_projid(ip)) ==
|
|
be32_to_cpu(gdqp->q_core.d_id));
|
|
xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
|
|
}
|
|
}
|
|
|