| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_shared.h" |
| #include "xfs_format.h" |
| #include "xfs_log_format.h" |
| #include "xfs_trans_resv.h" |
| #include "xfs_bit.h" |
| #include "xfs_sb.h" |
| #include "xfs_mount.h" |
| #include "xfs_inode.h" |
| #include "xfs_iwalk.h" |
| #include "xfs_quota.h" |
| #include "xfs_bmap.h" |
| #include "xfs_bmap_util.h" |
| #include "xfs_trans.h" |
| #include "xfs_trans_space.h" |
| #include "xfs_qm.h" |
| #include "xfs_trace.h" |
| #include "xfs_icache.h" |
| #include "xfs_error.h" |
| |
| /* |
| * The global quota manager. There is only one of these for the entire |
| * system, _not_ one per file system. XQM keeps track of the overall |
| * quota functionality, including maintaining the freelist and hash |
| * tables of dquots. |
| */ |
| STATIC int xfs_qm_init_quotainos(xfs_mount_t *); |
| STATIC int xfs_qm_init_quotainfo(xfs_mount_t *); |
| |
| STATIC void xfs_qm_destroy_quotainos(xfs_quotainfo_t *qi); |
| 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 |
| * fuzzy lookups instead of exact matches. Holding the lock over multiple |
| * operations is fine as all callers are used either during mount/umount |
| * or quotaoff. |
| */ |
| #define XFS_DQ_LOOKUP_BATCH 32 |
| |
| STATIC int |
| xfs_qm_dquot_walk( |
| struct xfs_mount *mp, |
| int type, |
| int (*execute)(struct xfs_dquot *dqp, void *data), |
| void *data) |
| { |
| struct xfs_quotainfo *qi = mp->m_quotainfo; |
| struct radix_tree_root *tree = xfs_dquot_tree(qi, type); |
| uint32_t next_index; |
| int last_error = 0; |
| int skipped; |
| int nr_found; |
| |
| restart: |
| skipped = 0; |
| next_index = 0; |
| nr_found = 0; |
| |
| while (1) { |
| struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH]; |
| int error = 0; |
| int i; |
| |
| mutex_lock(&qi->qi_tree_lock); |
| nr_found = radix_tree_gang_lookup(tree, (void **)batch, |
| next_index, XFS_DQ_LOOKUP_BATCH); |
| if (!nr_found) { |
| mutex_unlock(&qi->qi_tree_lock); |
| break; |
| } |
| |
| for (i = 0; i < nr_found; i++) { |
| struct xfs_dquot *dqp = batch[i]; |
| |
| next_index = be32_to_cpu(dqp->q_core.d_id) + 1; |
| |
| error = execute(batch[i], data); |
| if (error == -EAGAIN) { |
| skipped++; |
| continue; |
| } |
| if (error && last_error != -EFSCORRUPTED) |
| last_error = error; |
| } |
| |
| mutex_unlock(&qi->qi_tree_lock); |
| |
| /* bail out if the filesystem is corrupted. */ |
| if (last_error == -EFSCORRUPTED) { |
| skipped = 0; |
| break; |
| } |
| /* we're done if id overflows back to zero */ |
| if (!next_index) |
| break; |
| } |
| |
| if (skipped) { |
| delay(1); |
| goto restart; |
| } |
| |
| return last_error; |
| } |
| |
| |
| /* |
| * Purge a dquot from all tracking data structures and free it. |
| */ |
| STATIC int |
| xfs_qm_dqpurge( |
| struct xfs_dquot *dqp, |
| void *data) |
| { |
| struct xfs_mount *mp = dqp->q_mount; |
| struct xfs_quotainfo *qi = mp->m_quotainfo; |
| |
| xfs_dqlock(dqp); |
| if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) { |
| xfs_dqunlock(dqp); |
| return -EAGAIN; |
| } |
| |
| dqp->dq_flags |= XFS_DQ_FREEING; |
| |
| xfs_dqflock(dqp); |
| |
| /* |
| * If we are turning this type of quotas off, we don't care |
| * about the dirty metadata sitting in this dquot. OTOH, if |
| * we're unmounting, we do care, so we flush it and wait. |
| */ |
| if (XFS_DQ_IS_DIRTY(dqp)) { |
| struct xfs_buf *bp = NULL; |
| int error; |
| |
| /* |
| * We don't care about getting disk errors here. We need |
| * to purge this dquot anyway, so we go ahead regardless. |
| */ |
| error = xfs_qm_dqflush(dqp, &bp); |
| if (!error) { |
| error = xfs_bwrite(bp); |
| xfs_buf_relse(bp); |
| } |
| xfs_dqflock(dqp); |
| } |
| |
| ASSERT(atomic_read(&dqp->q_pincount) == 0); |
| ASSERT(XFS_FORCED_SHUTDOWN(mp) || |
| !test_bit(XFS_LI_IN_AIL, &dqp->q_logitem.qli_item.li_flags)); |
| |
| xfs_dqfunlock(dqp); |
| xfs_dqunlock(dqp); |
| |
| radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags), |
| be32_to_cpu(dqp->q_core.d_id)); |
| qi->qi_dquots--; |
| |
| /* |
| * We move dquots to the freelist as soon as their reference count |
| * hits zero, so it really should be on the freelist here. |
| */ |
| ASSERT(!list_empty(&dqp->q_lru)); |
| list_lru_del(&qi->qi_lru, &dqp->q_lru); |
| XFS_STATS_DEC(mp, xs_qm_dquot_unused); |
| |
| xfs_qm_dqdestroy(dqp); |
| return 0; |
| } |
| |
| /* |
| * Purge the dquot cache. |
| */ |
| void |
| xfs_qm_dqpurge_all( |
| struct xfs_mount *mp, |
| uint flags) |
| { |
| if (flags & XFS_QMOPT_UQUOTA) |
| xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL); |
| if (flags & XFS_QMOPT_GQUOTA) |
| xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL); |
| if (flags & XFS_QMOPT_PQUOTA) |
| xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL); |
| } |
| |
| /* |
| * Just destroy the quotainfo structure. |
| */ |
| void |
| xfs_qm_unmount( |
| struct xfs_mount *mp) |
| { |
| if (mp->m_quotainfo) { |
| xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL); |
| xfs_qm_destroy_quotainfo(mp); |
| } |
| } |
| |
| /* |
| * Called from the vfsops layer. |
| */ |
| void |
| xfs_qm_unmount_quotas( |
| 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); |
| 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) { |
| xfs_irele(mp->m_quotainfo->qi_uquotaip); |
| mp->m_quotainfo->qi_uquotaip = NULL; |
| } |
| if (mp->m_quotainfo->qi_gquotaip) { |
| xfs_irele(mp->m_quotainfo->qi_gquotaip); |
| mp->m_quotainfo->qi_gquotaip = NULL; |
| } |
| if (mp->m_quotainfo->qi_pquotaip) { |
| xfs_irele(mp->m_quotainfo->qi_pquotaip); |
| mp->m_quotainfo->qi_pquotaip = NULL; |
| } |
| } |
| } |
| |
| STATIC int |
| xfs_qm_dqattach_one( |
| xfs_inode_t *ip, |
| xfs_dqid_t id, |
| uint type, |
| bool doalloc, |
| 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; |
| } |
| |
| /* |
| * 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_inode(ip, type, doalloc, &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; |
| } |
| |
| static bool |
| xfs_qm_need_dqattach( |
| struct xfs_inode *ip) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| |
| if (!XFS_IS_QUOTA_RUNNING(mp)) |
| return false; |
| if (!XFS_IS_QUOTA_ON(mp)) |
| return false; |
| if (!XFS_NOT_DQATTACHED(mp, ip)) |
| return false; |
| if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino)) |
| return false; |
| return true; |
| } |
| |
| /* |
| * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON |
| * into account. |
| * If @doalloc is true, 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, |
| bool doalloc) |
| { |
| xfs_mount_t *mp = ip->i_mount; |
| int error = 0; |
| |
| if (!xfs_qm_need_dqattach(ip)) |
| return 0; |
| |
| ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| |
| if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) { |
| error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER, |
| doalloc, &ip->i_udquot); |
| if (error) |
| goto done; |
| ASSERT(ip->i_udquot); |
| } |
| |
| if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) { |
| error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP, |
| doalloc, &ip->i_gdquot); |
| if (error) |
| goto done; |
| ASSERT(ip->i_gdquot); |
| } |
| |
| if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) { |
| error = xfs_qm_dqattach_one(ip, ip->i_d.di_projid, XFS_DQ_PROJ, |
| doalloc, &ip->i_pdquot); |
| if (error) |
| goto done; |
| ASSERT(ip->i_pdquot); |
| } |
| |
| done: |
| /* |
| * Don't worry about the dquots that we may have attached before any |
| * error - they'll get detached later if it has not already been done. |
| */ |
| ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| return error; |
| } |
| |
| int |
| xfs_qm_dqattach( |
| struct xfs_inode *ip) |
| { |
| int error; |
| |
| if (!xfs_qm_need_dqattach(ip)) |
| return 0; |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| error = xfs_qm_dqattach_locked(ip, false); |
| 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 || ip->i_pdquot)) |
| return; |
| |
| trace_xfs_dquot_dqdetach(ip); |
| |
| ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino)); |
| 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; |
| } |
| if (ip->i_pdquot) { |
| xfs_qm_dqrele(ip->i_pdquot); |
| ip->i_pdquot = NULL; |
| } |
| } |
| |
| struct xfs_qm_isolate { |
| struct list_head buffers; |
| struct list_head dispose; |
| }; |
| |
| static enum lru_status |
| xfs_qm_dquot_isolate( |
| struct list_head *item, |
| struct list_lru_one *lru, |
| spinlock_t *lru_lock, |
| void *arg) |
| __releases(lru_lock) __acquires(lru_lock) |
| { |
| 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(dqp->q_mount, xs_qm_dqwants); |
| |
| trace_xfs_dqreclaim_want(dqp); |
| list_lru_isolate(lru, &dqp->q_lru); |
| XFS_STATS_DEC(dqp->q_mount, 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) |
| 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_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose); |
| XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused); |
| trace_xfs_dqreclaim_done(dqp); |
| XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims); |
| return LRU_REMOVED; |
| |
| out_miss_busy: |
| trace_xfs_dqreclaim_busy(dqp); |
| XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses); |
| return LRU_SKIP; |
| |
| out_unlock_dirty: |
| trace_xfs_dqreclaim_busy(dqp); |
| XFS_STATS_INC(dqp->q_mount, 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; |
| |
| if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM)) |
| return 0; |
| |
| INIT_LIST_HEAD(&isol.buffers); |
| INIT_LIST_HEAD(&isol.dispose); |
| |
| freed = list_lru_shrink_walk(&qi->qi_lru, sc, |
| xfs_qm_dquot_isolate, &isol); |
| |
| 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_shrink_count(&qi->qi_lru, sc); |
| } |
| |
| STATIC void |
| xfs_qm_set_defquota( |
| xfs_mount_t *mp, |
| uint type, |
| xfs_quotainfo_t *qinf) |
| { |
| xfs_dquot_t *dqp; |
| struct xfs_def_quota *defq; |
| struct xfs_disk_dquot *ddqp; |
| int error; |
| |
| error = xfs_qm_dqget_uncached(mp, 0, type, &dqp); |
| if (error) |
| return; |
| |
| ddqp = &dqp->q_core; |
| defq = xfs_get_defquota(dqp, qinf); |
| |
| /* |
| * Timers and warnings have been already set, let's just set the |
| * default limits for this quota type |
| */ |
| defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit); |
| defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit); |
| defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit); |
| defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit); |
| defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit); |
| defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit); |
| xfs_qm_dqdestroy(dqp); |
| } |
| |
| /* Initialize quota time limits from the root dquot. */ |
| static void |
| xfs_qm_init_timelimits( |
| struct xfs_mount *mp, |
| struct xfs_quotainfo *qinf) |
| { |
| struct xfs_disk_dquot *ddqp; |
| struct xfs_dquot *dqp; |
| uint type; |
| int error; |
| |
| 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; |
| |
| /* |
| * We try to get the limits from the superuser's limits fields. |
| * This is quite hacky, but it is standard quota practice. |
| * |
| * Since we may not have done a quotacheck by this point, just read |
| * the dquot without attaching it to any hashtables or lists. |
| * |
| * Timers and warnings are globally set by the first timer found in |
| * user/group/proj quota types, otherwise a default value is used. |
| * This should be split into different fields per quota type. |
| */ |
| if (XFS_IS_UQUOTA_RUNNING(mp)) |
| type = XFS_DQ_USER; |
| else if (XFS_IS_GQUOTA_RUNNING(mp)) |
| type = XFS_DQ_GROUP; |
| else |
| type = XFS_DQ_PROJ; |
| error = xfs_qm_dqget_uncached(mp, 0, type, &dqp); |
| if (error) |
| return; |
| |
| 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. |
| */ |
| if (ddqp->d_btimer) |
| qinf->qi_btimelimit = be32_to_cpu(ddqp->d_btimer); |
| if (ddqp->d_itimer) |
| qinf->qi_itimelimit = be32_to_cpu(ddqp->d_itimer); |
| if (ddqp->d_rtbtimer) |
| qinf->qi_rtbtimelimit = be32_to_cpu(ddqp->d_rtbtimer); |
| if (ddqp->d_bwarns) |
| qinf->qi_bwarnlimit = be16_to_cpu(ddqp->d_bwarns); |
| if (ddqp->d_iwarns) |
| qinf->qi_iwarnlimit = be16_to_cpu(ddqp->d_iwarns); |
| if (ddqp->d_rtbwarns) |
| qinf->qi_rtbwarnlimit = be16_to_cpu(ddqp->d_rtbwarns); |
| |
| xfs_qm_dqdestroy(dqp); |
| } |
| |
| /* |
| * This initializes all the quota information that's kept in the |
| * mount structure |
| */ |
| STATIC int |
| xfs_qm_init_quotainfo( |
| struct xfs_mount *mp) |
| { |
| struct xfs_quotainfo *qinf; |
| int error; |
| |
| ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| |
| qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), 0); |
| |
| error = list_lru_init(&qinf->qi_lru); |
| if (error) |
| goto out_free_qinf; |
| |
| /* |
| * See if quotainodes are setup, and if not, allocate them, |
| * and change the superblock accordingly. |
| */ |
| error = xfs_qm_init_quotainos(mp); |
| if (error) |
| goto out_free_lru; |
| |
| INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS); |
| INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS); |
| INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS); |
| mutex_init(&qinf->qi_tree_lock); |
| |
| /* 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); |
| qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen); |
| |
| mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD); |
| |
| xfs_qm_init_timelimits(mp, qinf); |
| |
| if (XFS_IS_UQUOTA_RUNNING(mp)) |
| xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf); |
| if (XFS_IS_GQUOTA_RUNNING(mp)) |
| xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf); |
| if (XFS_IS_PQUOTA_RUNNING(mp)) |
| xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf); |
| |
| 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; |
| |
| error = register_shrinker(&qinf->qi_shrinker); |
| if (error) |
| goto out_free_inos; |
| |
| return 0; |
| |
| out_free_inos: |
| mutex_destroy(&qinf->qi_quotaofflock); |
| mutex_destroy(&qinf->qi_tree_lock); |
| xfs_qm_destroy_quotainos(qinf); |
| out_free_lru: |
| list_lru_destroy(&qinf->qi_lru); |
| out_free_qinf: |
| kmem_free(qinf); |
| mp->m_quotainfo = NULL; |
| return error; |
| } |
| |
| /* |
| * 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); |
| |
| unregister_shrinker(&qi->qi_shrinker); |
| list_lru_destroy(&qi->qi_lru); |
| xfs_qm_destroy_quotainos(qi); |
| mutex_destroy(&qi->qi_tree_lock); |
| mutex_destroy(&qi->qi_quotaofflock); |
| kmem_free(qi); |
| mp->m_quotainfo = NULL; |
| } |
| |
| /* |
| * 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, |
| uint flags) |
| { |
| xfs_trans_t *tp; |
| int error; |
| bool need_alloc = true; |
| |
| *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; |
| if (XFS_IS_CORRUPT(mp, |
| mp->m_sb.sb_pquotino != NULLFSINO)) |
| return -EFSCORRUPTED; |
| } else if ((flags & XFS_QMOPT_GQUOTA) && |
| (mp->m_sb.sb_pquotino != NULLFSINO)) { |
| ino = mp->m_sb.sb_pquotino; |
| if (XFS_IS_CORRUPT(mp, |
| mp->m_sb.sb_gquotino != NULLFSINO)) |
| return -EFSCORRUPTED; |
| } |
| 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; |
| need_alloc = false; |
| } |
| } |
| |
| error = xfs_trans_alloc(mp, &M_RES(mp)->tr_create, |
| XFS_QM_QINOCREATE_SPACE_RES(mp), 0, 0, &tp); |
| if (error) |
| return error; |
| |
| if (need_alloc) { |
| error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, ip); |
| if (error) { |
| xfs_trans_cancel(tp); |
| 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)); |
| |
| 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 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 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_log_sb(tp); |
| |
| error = xfs_trans_commit(tp); |
| if (error) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_alert(mp, "%s failed (error %d)!", __func__, error); |
| } |
| if (need_alloc) |
| xfs_finish_inode_setup(*ip); |
| return error; |
| } |
| |
| |
| STATIC void |
| xfs_qm_reset_dqcounts( |
| xfs_mount_t *mp, |
| xfs_buf_t *bp, |
| xfs_dqid_t id, |
| uint type) |
| { |
| struct xfs_dqblk *dqb; |
| int j; |
| xfs_failaddr_t fa; |
| |
| trace_xfs_reset_dqcounts(bp, _RET_IP_); |
| |
| /* |
| * Reset all counters and timers. They'll be |
| * started afresh by xfs_qm_quotacheck. |
| */ |
| #ifdef DEBUG |
| j = (int)XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB) / |
| sizeof(xfs_dqblk_t); |
| ASSERT(mp->m_quotainfo->qi_dqperchunk == j); |
| #endif |
| dqb = bp->b_addr; |
| for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) { |
| struct xfs_disk_dquot *ddq; |
| |
| ddq = (struct xfs_disk_dquot *)&dqb[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_dquot_verify. |
| */ |
| fa = xfs_dqblk_verify(mp, &dqb[j], id + j, type); |
| if (fa) |
| xfs_dqblk_repair(mp, &dqb[j], id + j, type); |
| |
| /* |
| * Reset type in case we are reusing group quota file for |
| * project quotas or vice versa |
| */ |
| ddq->d_flags = type; |
| 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; |
| |
| if (xfs_sb_version_hascrc(&mp->m_sb)) { |
| xfs_update_cksum((char *)&dqb[j], |
| sizeof(struct xfs_dqblk), |
| XFS_DQUOT_CRC_OFF); |
| } |
| } |
| } |
| |
| STATIC int |
| xfs_qm_reset_dqcounts_all( |
| struct xfs_mount *mp, |
| xfs_dqid_t firstid, |
| xfs_fsblock_t bno, |
| xfs_filblks_t blkcnt, |
| uint flags, |
| struct list_head *buffer_list) |
| { |
| struct xfs_buf *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, |
| &xfs_dquot_buf_ops); |
| |
| /* |
| * CRC and validation errors will return a EFSCORRUPTED here. If |
| * this occurs, re-read without CRC validation so that we can |
| * repair the damage via xfs_qm_reset_dqcounts(). This process |
| * will leave a trace in the log indicating corruption has |
| * been detected. |
| */ |
| if (error == -EFSCORRUPTED) { |
| error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, |
| XFS_FSB_TO_DADDR(mp, bno), |
| mp->m_quotainfo->qi_dqchunklen, 0, &bp, |
| NULL); |
| } |
| |
| if (error) |
| break; |
| |
| /* |
| * A corrupt buffer might not have a verifier attached, so |
| * make sure we have the correct one attached before writeback |
| * occurs. |
| */ |
| bp->b_ops = &xfs_dquot_buf_ops; |
| xfs_qm_reset_dqcounts(mp, bp, firstid, type); |
| xfs_buf_delwri_queue(bp, buffer_list); |
| xfs_buf_relse(bp); |
| |
| /* goto the next block. */ |
| bno++; |
| firstid += mp->m_quotainfo->qi_dqperchunk; |
| } |
| |
| return error; |
| } |
| |
| /* |
| * Iterate over all allocated dquot blocks in this quota inode, zeroing all |
| * counters for every chunk of dquots that we find. |
| */ |
| STATIC int |
| xfs_qm_reset_dqcounts_buf( |
| struct xfs_mount *mp, |
| struct xfs_inode *qip, |
| uint flags, |
| struct list_head *buffer_list) |
| { |
| struct xfs_bmbt_irec *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), 0); |
| |
| lblkno = 0; |
| maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes); |
| do { |
| uint lock_mode; |
| |
| 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. |
| */ |
| lock_mode = xfs_ilock_data_map_shared(qip); |
| error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno, |
| map, &nmaps, 0); |
| xfs_iunlock(qip, lock_mode); |
| 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, |
| &xfs_dquot_buf_ops); |
| rablkno++; |
| } |
| } |
| /* |
| * Iterate thru all the blks in the extent and |
| * reset the counters of all the dquots inside them. |
| */ |
| error = xfs_qm_reset_dqcounts_all(mp, firstid, |
| map[i].br_startblock, |
| map[i].br_blockcount, |
| flags, buffer_list); |
| if (error) |
| goto out; |
| } |
| } while (nmaps > 0); |
| |
| out: |
| 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, |
| uint type, |
| xfs_qcnt_t nblks, |
| xfs_qcnt_t rtblks) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_dquot *dqp; |
| xfs_dqid_t id; |
| int error; |
| |
| id = xfs_qm_id_for_quotatype(ip, type); |
| error = xfs_qm_dqget(mp, id, type, true, &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); |
| xfs_qm_adjust_dqtimers(mp, &dqp->q_core); |
| } |
| |
| dqp->dq_flags |= XFS_DQ_DIRTY; |
| xfs_qm_dqput(dqp); |
| 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( |
| struct xfs_mount *mp, |
| struct xfs_trans *tp, |
| xfs_ino_t ino, |
| void *data) |
| { |
| struct xfs_inode *ip; |
| xfs_qcnt_t nblks; |
| xfs_filblks_t rtblks = 0; /* total rt blks */ |
| int error; |
| |
| ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| |
| /* |
| * rootino must have its resources accounted for, not so with the quota |
| * inodes. |
| */ |
| if (xfs_is_quota_inode(&mp->m_sb, ino)) |
| return 0; |
| |
| /* |
| * We don't _need_ to take the ilock EXCL here because quotacheck runs |
| * at mount time and therefore nobody will be racing chown/chproj. |
| */ |
| error = xfs_iget(mp, tp, ino, XFS_IGET_DONTCACHE, 0, &ip); |
| if (error == -EINVAL || error == -ENOENT) |
| return 0; |
| if (error) |
| return error; |
| |
| ASSERT(ip->i_delayed_blks == 0); |
| |
| if (XFS_IS_REALTIME_INODE(ip)) { |
| struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK); |
| |
| if (!(ifp->if_flags & XFS_IFEXTENTS)) { |
| error = xfs_iread_extents(tp, ip, XFS_DATA_FORK); |
| if (error) |
| goto error0; |
| } |
| |
| xfs_bmap_count_leaves(ifp, &rtblks); |
| } |
| |
| 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, XFS_DQ_USER, nblks, |
| rtblks); |
| if (error) |
| goto error0; |
| } |
| |
| if (XFS_IS_GQUOTA_ON(mp)) { |
| error = xfs_qm_quotacheck_dqadjust(ip, XFS_DQ_GROUP, nblks, |
| rtblks); |
| if (error) |
| goto error0; |
| } |
| |
| if (XFS_IS_PQUOTA_ON(mp)) { |
| error = xfs_qm_quotacheck_dqadjust(ip, XFS_DQ_PROJ, nblks, |
| rtblks); |
| if (error) |
| goto error0; |
| } |
| |
| error0: |
| xfs_irele(ip); |
| return error; |
| } |
| |
| STATIC int |
| xfs_qm_flush_one( |
| struct xfs_dquot *dqp, |
| void *data) |
| { |
| struct xfs_mount *mp = dqp->q_mount; |
| struct list_head *buffer_list = data; |
| struct xfs_buf *bp = NULL; |
| int error = 0; |
| |
| xfs_dqlock(dqp); |
| if (dqp->dq_flags & XFS_DQ_FREEING) |
| goto out_unlock; |
| if (!XFS_DQ_IS_DIRTY(dqp)) |
| goto out_unlock; |
| |
| /* |
| * The only way the dquot is already flush locked by the time quotacheck |
| * gets here is if reclaim flushed it before the dqadjust walk dirtied |
| * it for the final time. Quotacheck collects all dquot bufs in the |
| * local delwri queue before dquots are dirtied, so reclaim can't have |
| * possibly queued it for I/O. The only way out is to push the buffer to |
| * cycle the flush lock. |
| */ |
| if (!xfs_dqflock_nowait(dqp)) { |
| /* buf is pinned in-core by delwri list */ |
| bp = xfs_buf_incore(mp->m_ddev_targp, dqp->q_blkno, |
| mp->m_quotainfo->qi_dqchunklen, 0); |
| if (!bp) { |
| error = -EINVAL; |
| goto out_unlock; |
| } |
| xfs_buf_unlock(bp); |
| |
| xfs_buf_delwri_pushbuf(bp, buffer_list); |
| xfs_buf_rele(bp); |
| |
| error = -EAGAIN; |
| goto out_unlock; |
| } |
| |
| error = xfs_qm_dqflush(dqp, &bp); |
| if (error) |
| goto out_unlock; |
| |
| xfs_buf_delwri_queue(bp, buffer_list); |
| xfs_buf_relse(bp); |
| out_unlock: |
| xfs_dqunlock(dqp); |
| return error; |
| } |
| |
| /* |
| * Walk thru all the filesystem inodes and construct a consistent view |
| * of the disk quota world. If the quotacheck fails, disable quotas. |
| */ |
| STATIC int |
| xfs_qm_quotacheck( |
| xfs_mount_t *mp) |
| { |
| int error, error2; |
| uint flags; |
| LIST_HEAD (buffer_list); |
| struct xfs_inode *uip = mp->m_quotainfo->qi_uquotaip; |
| struct xfs_inode *gip = mp->m_quotainfo->qi_gquotaip; |
| struct xfs_inode *pip = mp->m_quotainfo->qi_pquotaip; |
| |
| flags = 0; |
| |
| ASSERT(uip || gip || pip); |
| ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| |
| 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. |
| */ |
| if (uip) { |
| error = xfs_qm_reset_dqcounts_buf(mp, uip, XFS_QMOPT_UQUOTA, |
| &buffer_list); |
| if (error) |
| goto error_return; |
| flags |= XFS_UQUOTA_CHKD; |
| } |
| |
| if (gip) { |
| error = xfs_qm_reset_dqcounts_buf(mp, gip, XFS_QMOPT_GQUOTA, |
| &buffer_list); |
| if (error) |
| goto error_return; |
| flags |= XFS_GQUOTA_CHKD; |
| } |
| |
| if (pip) { |
| error = xfs_qm_reset_dqcounts_buf(mp, pip, XFS_QMOPT_PQUOTA, |
| &buffer_list); |
| if (error) |
| goto error_return; |
| flags |= XFS_PQUOTA_CHKD; |
| } |
| |
| error = xfs_iwalk_threaded(mp, 0, 0, xfs_qm_dqusage_adjust, 0, true, |
| NULL); |
| if (error) |
| goto error_return; |
| |
| /* |
| * We've made all the changes that we need to make incore. Flush them |
| * down to disk buffers if everything was updated successfully. |
| */ |
| if (XFS_IS_UQUOTA_ON(mp)) { |
| error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one, |
| &buffer_list); |
| } |
| if (XFS_IS_GQUOTA_ON(mp)) { |
| error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one, |
| &buffer_list); |
| if (!error) |
| error = error2; |
| } |
| if (XFS_IS_PQUOTA_ON(mp)) { |
| error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one, |
| &buffer_list); |
| if (!error) |
| error = error2; |
| } |
| |
| error2 = xfs_buf_delwri_submit(&buffer_list); |
| if (!error) |
| error = error2; |
| |
| /* |
| * 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; |
| } |
| |
| /* |
| * 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_ALL_QUOTA_CHKD; |
| mp->m_qflags |= flags; |
| |
| error_return: |
| xfs_buf_delwri_cancel(&buffer_list); |
| |
| if (error) { |
| xfs_warn(mp, |
| "Quotacheck: Unsuccessful (Error %d): Disabling quotas.", |
| error); |
| /* |
| * We must turn off quotas. |
| */ |
| ASSERT(mp->m_quotainfo != 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 from xfs_mountfs to start quotas and initialize all |
| * necessary data structures like quotainfo. This is also responsible for |
| * running a quotacheck as necessary. We are guaranteed that the superblock |
| * is consistently read in at this point. |
| * |
| * If we fail here, the mount will continue with quota turned off. We don't |
| * need to inidicate success or failure at all. |
| */ |
| void |
| xfs_qm_mount_quotas( |
| struct xfs_mount *mp) |
| { |
| int error = 0; |
| uint sbf; |
| |
| /* |
| * If quotas on realtime volumes is not supported, we disable |
| * quotas immediately. |
| */ |
| if (mp->m_sb.sb_rextents) { |
| xfs_notice(mp, "Cannot turn on quotas for realtime filesystem"); |
| mp->m_qflags = 0; |
| goto write_changes; |
| } |
| |
| ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| |
| /* |
| * Allocate the quotainfo structure inside the mount struct, and |
| * create quotainode(s), and change/rev superblock if necessary. |
| */ |
| error = xfs_qm_init_quotainfo(mp); |
| if (error) { |
| /* |
| * We must turn off quotas. |
| */ |
| ASSERT(mp->m_quotainfo == NULL); |
| mp->m_qflags = 0; |
| goto write_changes; |
| } |
| /* |
| * If any of the quotas are not consistent, do a quotacheck. |
| */ |
| if (XFS_QM_NEED_QUOTACHECK(mp)) { |
| error = xfs_qm_quotacheck(mp); |
| if (error) { |
| /* Quotacheck failed and disabled quotas. */ |
| return; |
| } |
| } |
| /* |
| * 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. |
| */ |
| if (!XFS_IS_UQUOTA_ON(mp)) |
| mp->m_qflags &= ~XFS_UQUOTA_CHKD; |
| if (!XFS_IS_GQUOTA_ON(mp)) |
| mp->m_qflags &= ~XFS_GQUOTA_CHKD; |
| if (!XFS_IS_PQUOTA_ON(mp)) |
| mp->m_qflags &= ~XFS_PQUOTA_CHKD; |
| |
| write_changes: |
| /* |
| * We actually don't have to acquire the m_sb_lock at all. |
| * This can only be called from mount, and that's single threaded. XXX |
| */ |
| spin_lock(&mp->m_sb_lock); |
| sbf = mp->m_sb.sb_qflags; |
| mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL; |
| spin_unlock(&mp->m_sb_lock); |
| |
| if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) { |
| if (xfs_sync_sb(mp, false)) { |
| /* |
| * We could only have been turning quotas off. |
| * We aren't in very good shape actually because |
| * the incore structures are convinced that quotas are |
| * off, but the on disk superblock doesn't know that ! |
| */ |
| ASSERT(!(XFS_IS_QUOTA_RUNNING(mp))); |
| xfs_alert(mp, "%s: Superblock update failed!", |
| __func__); |
| } |
| } |
| |
| if (error) { |
| xfs_warn(mp, "Failed to initialize disk quotas."); |
| return; |
| } |
| } |
| |
| /* |
| * 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) |
| { |
| struct xfs_inode *uip = NULL; |
| struct xfs_inode *gip = NULL; |
| struct xfs_inode *pip = NULL; |
| int error; |
| uint flags = 0; |
| |
| ASSERT(mp->m_quotainfo); |
| |
| /* |
| * 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); |
| error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino, |
| 0, 0, &uip); |
| if (error) |
| return error; |
| } |
| if (XFS_IS_GQUOTA_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, |
| 0, 0, &gip); |
| if (error) |
| goto error_rele; |
| } |
| if (XFS_IS_PQUOTA_ON(mp) && |
| 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; |
| } |
| } else { |
| flags |= XFS_QMOPT_SBVERSION; |
| } |
| |
| /* |
| * Create the three 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) { |
| error = xfs_qm_qino_alloc(mp, &uip, |
| flags | XFS_QMOPT_UQUOTA); |
| if (error) |
| goto error_rele; |
| |
| flags &= ~XFS_QMOPT_SBVERSION; |
| } |
| if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) { |
| error = xfs_qm_qino_alloc(mp, &gip, |
| flags | XFS_QMOPT_GQUOTA); |
| if (error) |
| goto error_rele; |
| |
| flags &= ~XFS_QMOPT_SBVERSION; |
| } |
| if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) { |
| error = xfs_qm_qino_alloc(mp, &pip, |
| flags | XFS_QMOPT_PQUOTA); |
| if (error) |
| goto error_rele; |
| } |
| |
| mp->m_quotainfo->qi_uquotaip = uip; |
| mp->m_quotainfo->qi_gquotaip = gip; |
| mp->m_quotainfo->qi_pquotaip = pip; |
| |
| return 0; |
| |
| error_rele: |
| if (uip) |
| xfs_irele(uip); |
| if (gip) |
| xfs_irele(gip); |
| if (pip) |
| xfs_irele(pip); |
| return error; |
| } |
| |
| STATIC void |
| xfs_qm_destroy_quotainos( |
| xfs_quotainfo_t *qi) |
| { |
| if (qi->qi_uquotaip) { |
| xfs_irele(qi->qi_uquotaip); |
| qi->qi_uquotaip = NULL; /* paranoia */ |
| } |
| if (qi->qi_gquotaip) { |
| xfs_irele(qi->qi_gquotaip); |
| qi->qi_gquotaip = NULL; |
| } |
| if (qi->qi_pquotaip) { |
| xfs_irele(qi->qi_pquotaip); |
| qi->qi_pquotaip = NULL; |
| } |
| } |
| |
| STATIC void |
| xfs_qm_dqfree_one( |
| struct xfs_dquot *dqp) |
| { |
| struct xfs_mount *mp = dqp->q_mount; |
| struct xfs_quotainfo *qi = mp->m_quotainfo; |
| |
| mutex_lock(&qi->qi_tree_lock); |
| radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags), |
| be32_to_cpu(dqp->q_core.d_id)); |
| |
| qi->qi_dquots--; |
| mutex_unlock(&qi->qi_tree_lock); |
| |
| xfs_qm_dqdestroy(dqp); |
| } |
| |
| /* --------------- 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, |
| xfs_dqid_t uid, |
| xfs_dqid_t gid, |
| prid_t prid, |
| uint flags, |
| struct xfs_dquot **O_udqpp, |
| struct xfs_dquot **O_gdqpp, |
| struct xfs_dquot **O_pdqpp) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_dquot *uq = NULL; |
| struct xfs_dquot *gq = NULL; |
| struct xfs_dquot *pq = NULL; |
| 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, true); |
| if (error) { |
| xfs_iunlock(ip, lockflags); |
| return error; |
| } |
| } |
| |
| 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); |
| error = xfs_qm_dqget(mp, uid, XFS_DQ_USER, true, &uq); |
| if (error) { |
| 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 = xfs_qm_dqhold(ip->i_udquot); |
| } |
| } |
| 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, gid, XFS_DQ_GROUP, true, &gq); |
| if (error) { |
| ASSERT(error != -ENOENT); |
| goto error_rele; |
| } |
| xfs_dqunlock(gq); |
| lockflags = XFS_ILOCK_SHARED; |
| xfs_ilock(ip, lockflags); |
| } else { |
| ASSERT(ip->i_gdquot); |
| gq = xfs_qm_dqhold(ip->i_gdquot); |
| } |
| } |
| if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) { |
| if (ip->i_d.di_projid != prid) { |
| xfs_iunlock(ip, lockflags); |
| error = xfs_qm_dqget(mp, (xfs_dqid_t)prid, XFS_DQ_PROJ, |
| true, &pq); |
| if (error) { |
| ASSERT(error != -ENOENT); |
| goto error_rele; |
| } |
| xfs_dqunlock(pq); |
| lockflags = XFS_ILOCK_SHARED; |
| xfs_ilock(ip, lockflags); |
| } else { |
| ASSERT(ip->i_pdquot); |
| pq = xfs_qm_dqhold(ip->i_pdquot); |
| } |
| } |
| if (uq) |
| trace_xfs_dquot_dqalloc(ip); |
| |
| xfs_iunlock(ip, lockflags); |
| if (O_udqpp) |
| *O_udqpp = uq; |
| else |
| xfs_qm_dqrele(uq); |
| if (O_gdqpp) |
| *O_gdqpp = gq; |
| else |
| xfs_qm_dqrele(gq); |
| if (O_pdqpp) |
| *O_pdqpp = pq; |
| else |
| xfs_qm_dqrele(pq); |
| return 0; |
| |
| error_rele: |
| xfs_qm_dqrele(gq); |
| xfs_qm_dqrele(uq); |
| return error; |
| } |
| |
| /* |
| * 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. |
| */ |
| *IO_olddq = xfs_qm_dqhold(newdq); |
| |
| return prevdq; |
| } |
| |
| /* |
| * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID). |
| */ |
| int |
| xfs_qm_vop_chown_reserve( |
| struct xfs_trans *tp, |
| struct xfs_inode *ip, |
| struct xfs_dquot *udqp, |
| struct xfs_dquot *gdqp, |
| struct xfs_dquot *pdqp, |
| uint flags) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| uint64_t delblks; |
| unsigned int blkflags, prjflags = 0; |
| struct xfs_dquot *udq_unres = NULL; |
| struct xfs_dquot *gdq_unres = NULL; |
| struct xfs_dquot *pdq_unres = NULL; |
| struct xfs_dquot *udq_delblks = NULL; |
| struct xfs_dquot *gdq_delblks = NULL; |
| struct xfs_dquot *pdq_delblks = NULL; |
| int error; |
| |
| |
| ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED)); |
| ASSERT(XFS_IS_QUOTA_RUNNING(mp)); |
| |
| delblks = ip->i_delayed_blks; |
| 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 != be32_to_cpu(udqp->q_core.d_id)) { |
| udq_delblks = 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); |
| udq_unres = ip->i_udquot; |
| } |
| } |
| if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp && |
| ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) { |
| gdq_delblks = gdqp; |
| if (delblks) { |
| ASSERT(ip->i_gdquot); |
| gdq_unres = ip->i_gdquot; |
| } |
| } |
| |
| if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp && |
| ip->i_d.di_projid != be32_to_cpu(pdqp->q_core.d_id)) { |
| prjflags = XFS_QMOPT_ENOSPC; |
| pdq_delblks = pdqp; |
| if (delblks) { |
| ASSERT(ip->i_pdquot); |
| pdq_unres = ip->i_pdquot; |
| } |
| } |
| |
| error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount, |
| udq_delblks, gdq_delblks, pdq_delblks, |
| ip->i_d.di_nblocks, 1, |
| flags | blkflags | prjflags); |
| if (error) |
| 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(udq_delblks || gdq_delblks || pdq_delblks); |
| ASSERT(udq_unres || gdq_unres || pdq_unres); |
| error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, |
| udq_delblks, gdq_delblks, pdq_delblks, |
| (xfs_qcnt_t)delblks, 0, |
| flags | blkflags | prjflags); |
| if (error) |
| return error; |
| xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount, |
| udq_unres, gdq_unres, pdq_unres, |
| -((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); |
| 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_dquot *pdqp) |
| { |
| 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_IS_UQUOTA_ON(mp)) { |
| ASSERT(ip->i_udquot == NULL); |
| ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id)); |
| |
| ip->i_udquot = xfs_qm_dqhold(udqp); |
| xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1); |
| } |
| if (gdqp && XFS_IS_GQUOTA_ON(mp)) { |
| ASSERT(ip->i_gdquot == NULL); |
| ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id)); |
| ip->i_gdquot = xfs_qm_dqhold(gdqp); |
| xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1); |
| } |
| if (pdqp && XFS_IS_PQUOTA_ON(mp)) { |
| ASSERT(ip->i_pdquot == NULL); |
| ASSERT(ip->i_d.di_projid == be32_to_cpu(pdqp->q_core.d_id)); |
| |
| ip->i_pdquot = xfs_qm_dqhold(pdqp); |
| xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1); |
| } |
| } |
| |