diff options
Diffstat (limited to 'fs/xfs/xfs_qm.c')
-rw-r--r-- | fs/xfs/xfs_qm.c | 382 |
1 files changed, 215 insertions, 167 deletions
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index d320794d03ce..3e6c2e6c9cd2 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -17,6 +17,7 @@ */ #include "xfs.h" #include "xfs_fs.h" +#include "xfs_format.h" #include "xfs_bit.h" #include "xfs_log.h" #include "xfs_trans.h" @@ -37,7 +38,6 @@ #include "xfs_attr.h" #include "xfs_buf_item.h" #include "xfs_trans_space.h" -#include "xfs_utils.h" #include "xfs_qm.h" #include "xfs_trace.h" #include "xfs_icache.h" @@ -51,8 +51,9 @@ */ STATIC int xfs_qm_init_quotainos(xfs_mount_t *); STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); -STATIC int xfs_qm_shake(struct shrinker *, struct shrink_control *); + +STATIC void xfs_qm_dqfree_one(struct xfs_dquot *dqp); /* * We use the batch lookup interface to iterate over the dquots as it * currently is the only interface into the radix tree code that allows @@ -203,12 +204,9 @@ xfs_qm_dqpurge( * We move dquots to the freelist as soon as their reference count * hits zero, so it really should be on the freelist here. */ - mutex_lock(&qi->qi_lru_lock); ASSERT(!list_empty(&dqp->q_lru)); - list_del_init(&dqp->q_lru); - qi->qi_lru_count--; + list_lru_del(&qi->qi_lru, &dqp->q_lru); XFS_STATS_DEC(xs_qm_dquot_unused); - mutex_unlock(&qi->qi_lru_lock); xfs_qm_dqdestroy(dqp); @@ -680,6 +678,143 @@ xfs_qm_calc_dquots_per_chunk( return ndquots; } +struct xfs_qm_isolate { + struct list_head buffers; + struct list_head dispose; +}; + +static enum lru_status +xfs_qm_dquot_isolate( + struct list_head *item, + spinlock_t *lru_lock, + void *arg) +{ + struct xfs_dquot *dqp = container_of(item, + struct xfs_dquot, q_lru); + struct xfs_qm_isolate *isol = arg; + + if (!xfs_dqlock_nowait(dqp)) + goto out_miss_busy; + + /* + * This dquot has acquired a reference in the meantime remove it from + * the freelist and try again. + */ + if (dqp->q_nrefs) { + xfs_dqunlock(dqp); + XFS_STATS_INC(xs_qm_dqwants); + + trace_xfs_dqreclaim_want(dqp); + list_del_init(&dqp->q_lru); + XFS_STATS_DEC(xs_qm_dquot_unused); + return LRU_REMOVED; + } + + /* + * If the dquot is dirty, flush it. If it's already being flushed, just + * skip it so there is time for the IO to complete before we try to + * reclaim it again on the next LRU pass. + */ + if (!xfs_dqflock_nowait(dqp)) { + xfs_dqunlock(dqp); + goto out_miss_busy; + } + + if (XFS_DQ_IS_DIRTY(dqp)) { + struct xfs_buf *bp = NULL; + int error; + + trace_xfs_dqreclaim_dirty(dqp); + + /* we have to drop the LRU lock to flush the dquot */ + spin_unlock(lru_lock); + + error = xfs_qm_dqflush(dqp, &bp); + if (error) { + xfs_warn(dqp->q_mount, "%s: dquot %p flush failed", + __func__, dqp); + goto out_unlock_dirty; + } + + xfs_buf_delwri_queue(bp, &isol->buffers); + xfs_buf_relse(bp); + goto out_unlock_dirty; + } + xfs_dqfunlock(dqp); + + /* + * Prevent lookups now that we are past the point of no return. + */ + dqp->dq_flags |= XFS_DQ_FREEING; + xfs_dqunlock(dqp); + + ASSERT(dqp->q_nrefs == 0); + list_move_tail(&dqp->q_lru, &isol->dispose); + XFS_STATS_DEC(xs_qm_dquot_unused); + trace_xfs_dqreclaim_done(dqp); + XFS_STATS_INC(xs_qm_dqreclaims); + return LRU_REMOVED; + +out_miss_busy: + trace_xfs_dqreclaim_busy(dqp); + XFS_STATS_INC(xs_qm_dqreclaim_misses); + return LRU_SKIP; + +out_unlock_dirty: + trace_xfs_dqreclaim_busy(dqp); + XFS_STATS_INC(xs_qm_dqreclaim_misses); + xfs_dqunlock(dqp); + spin_lock(lru_lock); + return LRU_RETRY; +} + +static unsigned long +xfs_qm_shrink_scan( + struct shrinker *shrink, + struct shrink_control *sc) +{ + struct xfs_quotainfo *qi = container_of(shrink, + struct xfs_quotainfo, qi_shrinker); + struct xfs_qm_isolate isol; + unsigned long freed; + int error; + unsigned long nr_to_scan = sc->nr_to_scan; + + if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT)) + return 0; + + INIT_LIST_HEAD(&isol.buffers); + INIT_LIST_HEAD(&isol.dispose); + + freed = list_lru_walk_node(&qi->qi_lru, sc->nid, xfs_qm_dquot_isolate, &isol, + &nr_to_scan); + + error = xfs_buf_delwri_submit(&isol.buffers); + if (error) + xfs_warn(NULL, "%s: dquot reclaim failed", __func__); + + while (!list_empty(&isol.dispose)) { + struct xfs_dquot *dqp; + + dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru); + list_del_init(&dqp->q_lru); + xfs_qm_dqfree_one(dqp); + } + + return freed; +} + +static unsigned long +xfs_qm_shrink_count( + struct shrinker *shrink, + struct shrink_control *sc) +{ + struct xfs_quotainfo *qi = container_of(shrink, + struct xfs_quotainfo, qi_shrinker); + + return list_lru_count_node(&qi->qi_lru, sc->nid); +} + /* * This initializes all the quota information that's kept in the * mount structure @@ -696,11 +831,18 @@ xfs_qm_init_quotainfo( qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP); + if ((error = list_lru_init(&qinf->qi_lru))) { + kmem_free(qinf); + mp->m_quotainfo = NULL; + return error; + } + /* * See if quotainodes are setup, and if not, allocate them, * and change the superblock accordingly. */ if ((error = xfs_qm_init_quotainos(mp))) { + list_lru_destroy(&qinf->qi_lru); kmem_free(qinf); mp->m_quotainfo = NULL; return error; @@ -711,10 +853,6 @@ xfs_qm_init_quotainfo( INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS); mutex_init(&qinf->qi_tree_lock); - INIT_LIST_HEAD(&qinf->qi_lru_list); - qinf->qi_lru_count = 0; - mutex_init(&qinf->qi_lru_lock); - /* mutex used to serialize quotaoffs */ mutex_init(&qinf->qi_quotaofflock); @@ -779,8 +917,10 @@ xfs_qm_init_quotainfo( qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT; } - qinf->qi_shrinker.shrink = xfs_qm_shake; + qinf->qi_shrinker.count_objects = xfs_qm_shrink_count; + qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan; qinf->qi_shrinker.seeks = DEFAULT_SEEKS; + qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE; register_shrinker(&qinf->qi_shrinker); return 0; } @@ -801,6 +941,7 @@ xfs_qm_destroy_quotainfo( ASSERT(qi != NULL); unregister_shrinker(&qi->qi_shrinker); + list_lru_destroy(&qi->qi_lru); if (qi->qi_uquotaip) { IRELE(qi->qi_uquotaip); @@ -834,21 +975,52 @@ xfs_qm_qino_alloc( int error; int committed; + *ip = NULL; + /* + * With superblock that doesn't have separate pquotino, we + * share an inode between gquota and pquota. If the on-disk + * superblock has GQUOTA and the filesystem is now mounted + * with PQUOTA, just use sb_gquotino for sb_pquotino and + * vice-versa. + */ + if (!xfs_sb_version_has_pquotino(&mp->m_sb) && + (flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) { + xfs_ino_t ino = NULLFSINO; + + if ((flags & XFS_QMOPT_PQUOTA) && + (mp->m_sb.sb_gquotino != NULLFSINO)) { + ino = mp->m_sb.sb_gquotino; + ASSERT(mp->m_sb.sb_pquotino == NULLFSINO); + } else if ((flags & XFS_QMOPT_GQUOTA) && + (mp->m_sb.sb_pquotino != NULLFSINO)) { + ino = mp->m_sb.sb_pquotino; + ASSERT(mp->m_sb.sb_gquotino == NULLFSINO); + } + if (ino != NULLFSINO) { + error = xfs_iget(mp, NULL, ino, 0, 0, ip); + if (error) + return error; + mp->m_sb.sb_gquotino = NULLFSINO; + mp->m_sb.sb_pquotino = NULLFSINO; + } + } + 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))) { + error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create, + XFS_QM_QINOCREATE_SPACE_RES(mp), 0); + if (error) { 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; + if (!*ip) { + 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; + } } /* @@ -860,21 +1032,25 @@ xfs_qm_qino_alloc( 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_GQUOTINO | XFS_SB_PQUOTINO | XFS_SB_QFLAGS)) == + (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | + XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | + XFS_SB_QFLAGS)); xfs_sb_version_addquota(&mp->m_sb); mp->m_sb.sb_uquotino = NULLFSINO; mp->m_sb.sb_gquotino = NULLFSINO; + mp->m_sb.sb_pquotino = NULLFSINO; - /* qflags will get updated _after_ quotacheck */ - mp->m_sb.sb_qflags = 0; + /* qflags will get updated fully _after_ quotacheck */ + mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT; } if (flags & XFS_QMOPT_UQUOTA) mp->m_sb.sb_uquotino = (*ip)->i_ino; - else + else if (flags & XFS_QMOPT_GQUOTA) mp->m_sb.sb_gquotino = (*ip)->i_ino; + else + mp->m_sb.sb_pquotino = (*ip)->i_ino; spin_unlock(&mp->m_sb_lock); xfs_mod_sb(tp, sbfields); @@ -1484,11 +1660,10 @@ xfs_qm_init_quotainos( if (error) goto error_rele; } - /* XXX: Use gquotino for now */ if (XFS_IS_PQUOTA_ON(mp) && - mp->m_sb.sb_gquotino != NULLFSINO) { - ASSERT(mp->m_sb.sb_gquotino > 0); - error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino, + mp->m_sb.sb_pquotino != NULLFSINO) { + ASSERT(mp->m_sb.sb_pquotino > 0); + error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino, 0, 0, &pip); if (error) goto error_rele; @@ -1496,7 +1671,8 @@ xfs_qm_init_quotainos( } else { flags |= XFS_QMOPT_SBVERSION; sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | - XFS_SB_GQUOTINO | XFS_SB_QFLAGS); + XFS_SB_GQUOTINO | XFS_SB_PQUOTINO | + XFS_SB_QFLAGS); } /* @@ -1524,9 +1700,8 @@ xfs_qm_init_quotainos( flags &= ~XFS_QMOPT_SBVERSION; } if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) { - /* XXX: Use XFS_SB_GQUOTINO for now */ error = xfs_qm_qino_alloc(mp, &pip, - sbflags | XFS_SB_GQUOTINO, + sbflags | XFS_SB_PQUOTINO, flags | XFS_QMOPT_PQUOTA); if (error) goto error_rele; @@ -1565,132 +1740,6 @@ xfs_qm_dqfree_one( xfs_qm_dqdestroy(dqp); } -STATIC void -xfs_qm_dqreclaim_one( - struct xfs_dquot *dqp, - struct list_head *buffer_list, - struct list_head *dispose_list) -{ - struct xfs_mount *mp = dqp->q_mount; - struct xfs_quotainfo *qi = mp->m_quotainfo; - int error; - - if (!xfs_dqlock_nowait(dqp)) - goto out_move_tail; - - /* - * This dquot has acquired a reference in the meantime remove it from - * the freelist and try again. - */ - if (dqp->q_nrefs) { - xfs_dqunlock(dqp); - - trace_xfs_dqreclaim_want(dqp); - XFS_STATS_INC(xs_qm_dqwants); - - list_del_init(&dqp->q_lru); - qi->qi_lru_count--; - XFS_STATS_DEC(xs_qm_dquot_unused); - return; - } - - /* - * 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 out_unlock_move_tail; - - if (XFS_DQ_IS_DIRTY(dqp)) { - struct xfs_buf *bp = NULL; - - trace_xfs_dqreclaim_dirty(dqp); - - error = xfs_qm_dqflush(dqp, &bp); - if (error) { - xfs_warn(mp, "%s: dquot %p flush failed", - __func__, dqp); - goto out_unlock_move_tail; - } - - xfs_buf_delwri_queue(bp, buffer_list); - xfs_buf_relse(bp); - /* - * Give the dquot another try on the freelist, as the - * flushing will take some time. - */ - goto out_unlock_move_tail; - } - xfs_dqfunlock(dqp); - - /* - * Prevent lookups now that we are past the point of no return. - */ - dqp->dq_flags |= XFS_DQ_FREEING; - xfs_dqunlock(dqp); - - ASSERT(dqp->q_nrefs == 0); - list_move_tail(&dqp->q_lru, dispose_list); - qi->qi_lru_count--; - XFS_STATS_DEC(xs_qm_dquot_unused); - - trace_xfs_dqreclaim_done(dqp); - XFS_STATS_INC(xs_qm_dqreclaims); - return; - - /* - * Move the dquot to the tail of the list so that we don't spin on it. - */ -out_unlock_move_tail: - xfs_dqunlock(dqp); -out_move_tail: - list_move_tail(&dqp->q_lru, &qi->qi_lru_list); - trace_xfs_dqreclaim_busy(dqp); - XFS_STATS_INC(xs_qm_dqreclaim_misses); -} - -STATIC int -xfs_qm_shake( - struct shrinker *shrink, - struct shrink_control *sc) -{ - struct xfs_quotainfo *qi = - container_of(shrink, struct xfs_quotainfo, qi_shrinker); - int nr_to_scan = sc->nr_to_scan; - LIST_HEAD (buffer_list); - LIST_HEAD (dispose_list); - struct xfs_dquot *dqp; - int error; - - if ((sc->gfp_mask & (__GFP_FS|__GFP_WAIT)) != (__GFP_FS|__GFP_WAIT)) - return 0; - if (!nr_to_scan) - goto out; - - mutex_lock(&qi->qi_lru_lock); - while (!list_empty(&qi->qi_lru_list)) { - if (nr_to_scan-- <= 0) - break; - dqp = list_first_entry(&qi->qi_lru_list, struct xfs_dquot, - q_lru); - xfs_qm_dqreclaim_one(dqp, &buffer_list, &dispose_list); - } - mutex_unlock(&qi->qi_lru_lock); - - error = xfs_buf_delwri_submit(&buffer_list); - if (error) - xfs_warn(NULL, "%s: dquot reclaim failed", __func__); - - while (!list_empty(&dispose_list)) { - dqp = list_first_entry(&dispose_list, struct xfs_dquot, q_lru); - list_del_init(&dqp->q_lru); - xfs_qm_dqfree_one(dqp); - } - -out: - return (qi->qi_lru_count / 100) * sysctl_vfs_cache_pressure; -} - /* * Start a transaction and write the incore superblock changes to * disk. flags parameter indicates which fields have changed. @@ -1704,8 +1753,7 @@ xfs_qm_write_sb_changes( int error; tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE); - error = xfs_trans_reserve(tp, 0, XFS_QM_SBCHANGE_LOG_RES(mp), - 0, 0, XFS_DEFAULT_LOG_COUNT); + error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0); if (error) { xfs_trans_cancel(tp, 0); return error; @@ -1734,8 +1782,8 @@ xfs_qm_write_sb_changes( int xfs_qm_vop_dqalloc( struct xfs_inode *ip, - uid_t uid, - gid_t gid, + xfs_dqid_t uid, + xfs_dqid_t gid, prid_t prid, uint flags, struct xfs_dquot **O_udqpp, @@ -1782,7 +1830,7 @@ xfs_qm_vop_dqalloc( * holding ilock. */ xfs_iunlock(ip, lockflags); - error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t) uid, + error = xfs_qm_dqget(mp, NULL, uid, XFS_DQ_USER, XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, @@ -1809,7 +1857,7 @@ xfs_qm_vop_dqalloc( if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) { if (ip->i_d.di_gid != gid) { xfs_iunlock(ip, lockflags); - error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)gid, + error = xfs_qm_dqget(mp, NULL, gid, XFS_DQ_GROUP, XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, @@ -1943,7 +1991,7 @@ xfs_qm_vop_chown_reserve( 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)) { + ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) { udq_delblks = udqp; /* * If there are delayed allocation blocks, then we have to |