xfs: remove XFS_DQ_INACTIVE
Free dquots when purging them during umount instead of keeping them around on the freelist in a degraded state. The out of order locking in xfs_qm_dqpurge will be removed again later in this series. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Ben Myers <bpm@sgi.com>
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@ -1302,6 +1302,14 @@ xfs_qm_dqpurge(
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ASSERT(mutex_is_locked(&mp->m_quotainfo->qi_dqlist_lock));
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ASSERT(mutex_is_locked(&dqp->q_hash->qh_lock));
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/*
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* XXX(hch): horrible locking order, will get cleaned up ASAP.
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*/
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if (!mutex_trylock(&xfs_Gqm->qm_dqfrlist_lock)) {
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mutex_unlock(&dqp->q_hash->qh_lock);
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return 1;
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}
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xfs_dqlock(dqp);
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/*
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* We really can't afford to purge a dquot that is
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@ -1364,25 +1372,23 @@ xfs_qm_dqpurge(
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list_del_init(&dqp->q_hashlist);
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qh->qh_version++;
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list_del_init(&dqp->q_mplist);
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mp->m_quotainfo->qi_dqreclaims++;
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mp->m_quotainfo->qi_dquots--;
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/*
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* XXX Move this to the front of the freelist, if we can get the
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* freelist lock.
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*/
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ASSERT(!list_empty(&dqp->q_freelist));
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dqp->q_mount = NULL;
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dqp->q_hash = NULL;
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dqp->dq_flags = XFS_DQ_INACTIVE;
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memset(&dqp->q_core, 0, sizeof(dqp->q_core));
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list_del_init(&dqp->q_freelist);
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xfs_Gqm->qm_dqfrlist_cnt--;
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xfs_dqfunlock(dqp);
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xfs_dqunlock(dqp);
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mutex_unlock(&qh->qh_lock);
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return (0);
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}
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mutex_unlock(&xfs_Gqm->qm_dqfrlist_lock);
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mutex_unlock(&qh->qh_lock);
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xfs_qm_dqdestroy(dqp);
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return 0;
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}
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/*
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* Give the buffer a little push if it is incore and
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@ -154,12 +154,17 @@ 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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mutex_lock(&xqm->qm_dqfrlist_lock);
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ASSERT(list_empty(&xqm->qm_dqfrlist));
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mutex_unlock(&xqm->qm_dqfrlist_lock);
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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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@ -171,17 +176,6 @@ xfs_qm_destroy(
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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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@ -232,33 +226,9 @@ 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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@ -1728,8 +1698,6 @@ again:
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* both the dquot and the freelistlock.
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*/
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if (dqp->dq_flags & XFS_DQ_WANT) {
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ASSERT(! (dqp->dq_flags & XFS_DQ_INACTIVE));
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trace_xfs_dqreclaim_want(dqp);
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XQM_STATS_INC(xqmstats.xs_qm_dqwants);
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restarts++;
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@ -1737,23 +1705,6 @@ again:
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goto dqunlock;
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}
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/*
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* If the dquot is inactive, we are assured that it is
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* not on the mplist or the hashlist, and that makes our
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* life easier.
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*/
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if (dqp->dq_flags & XFS_DQ_INACTIVE) {
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ASSERT(mp == 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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dqpout = dqp;
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XQM_STATS_INC(xqmstats.xs_qm_dqinact_reclaims);
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goto dqunlock;
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}
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ASSERT(dqp->q_hash);
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ASSERT(!list_empty(&dqp->q_mplist));
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@ -88,7 +88,6 @@ typedef struct xfs_dqblk {
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#define XFS_DQ_GROUP 0x0004 /* a group quota */
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#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
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#define XFS_DQ_WANT 0x0010 /* for lookup/reclaim race */
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#define XFS_DQ_INACTIVE 0x0020 /* dq off mplist & hashlist */
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#define XFS_DQ_ALLTYPES (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
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@ -97,8 +96,7 @@ typedef struct xfs_dqblk {
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{ XFS_DQ_PROJ, "PROJ" }, \
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{ XFS_DQ_GROUP, "GROUP" }, \
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{ XFS_DQ_DIRTY, "DIRTY" }, \
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{ XFS_DQ_WANT, "WANT" }, \
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{ XFS_DQ_INACTIVE, "INACTIVE" }
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{ XFS_DQ_WANT, "WANT" }
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/*
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* In the worst case, when both user and group quotas are on,
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