![Glauber Costa](/assets/img/avatar_default.png)
This patch adds the missing call to list_lru_destroy (spotted by Li Zhong) and moves the deletion to after the shrinker is unregistered, as correctly spotted by Dave Signed-off-by: Glauber Costa <glommer@openvz.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Dave Chinner <dchinner@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2127 lines
51 KiB
C
2127 lines
51 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_format.h"
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#include "xfs_bit.h"
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#include "xfs_log.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_qm.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_cksum.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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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 void xfs_qm_dqfree_one(struct xfs_dquot *dqp);
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/*
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* We use the batch lookup interface to iterate over the dquots as it
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* currently is the only interface into the radix tree code that allows
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* fuzzy lookups instead of exact matches. Holding the lock over multiple
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* operations is fine as all callers are used either during mount/umount
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* or quotaoff.
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*/
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#define XFS_DQ_LOOKUP_BATCH 32
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STATIC int
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xfs_qm_dquot_walk(
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struct xfs_mount *mp,
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int type,
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int (*execute)(struct xfs_dquot *dqp, void *data),
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void *data)
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{
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struct xfs_quotainfo *qi = mp->m_quotainfo;
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struct radix_tree_root *tree = xfs_dquot_tree(qi, type);
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uint32_t next_index;
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int last_error = 0;
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int skipped;
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int nr_found;
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restart:
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skipped = 0;
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next_index = 0;
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nr_found = 0;
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while (1) {
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struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
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int error = 0;
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int i;
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mutex_lock(&qi->qi_tree_lock);
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nr_found = radix_tree_gang_lookup(tree, (void **)batch,
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next_index, XFS_DQ_LOOKUP_BATCH);
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if (!nr_found) {
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mutex_unlock(&qi->qi_tree_lock);
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break;
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}
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for (i = 0; i < nr_found; i++) {
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struct xfs_dquot *dqp = batch[i];
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next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
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error = execute(batch[i], data);
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if (error == EAGAIN) {
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skipped++;
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continue;
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}
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if (error && last_error != EFSCORRUPTED)
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last_error = error;
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}
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mutex_unlock(&qi->qi_tree_lock);
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/* bail out if the filesystem is corrupted. */
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if (last_error == EFSCORRUPTED) {
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skipped = 0;
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break;
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}
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}
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if (skipped) {
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delay(1);
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goto restart;
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}
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return last_error;
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}
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/*
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* Purge a dquot from all tracking data structures and free it.
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*/
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STATIC int
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xfs_qm_dqpurge(
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struct xfs_dquot *dqp,
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void *data)
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{
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struct xfs_mount *mp = dqp->q_mount;
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struct xfs_quotainfo *qi = mp->m_quotainfo;
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struct xfs_dquot *gdqp = NULL;
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struct xfs_dquot *pdqp = NULL;
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xfs_dqlock(dqp);
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if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
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xfs_dqunlock(dqp);
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return EAGAIN;
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}
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/*
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* If this quota has a hint attached, prepare for releasing it now.
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*/
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gdqp = dqp->q_gdquot;
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if (gdqp) {
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xfs_dqlock(gdqp);
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dqp->q_gdquot = NULL;
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}
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pdqp = dqp->q_pdquot;
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if (pdqp) {
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xfs_dqlock(pdqp);
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dqp->q_pdquot = NULL;
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}
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dqp->dq_flags |= XFS_DQ_FREEING;
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xfs_dqflock(dqp);
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/*
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* If we are turning this type of quotas off, we don't care
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* about the dirty metadata sitting in this dquot. OTOH, if
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* we're unmounting, we do care, so we flush it and wait.
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*/
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if (XFS_DQ_IS_DIRTY(dqp)) {
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struct xfs_buf *bp = NULL;
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int error;
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/*
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* We don't care about getting disk errors here. We need
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* to purge this dquot anyway, so we go ahead regardless.
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*/
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error = xfs_qm_dqflush(dqp, &bp);
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if (error) {
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xfs_warn(mp, "%s: dquot %p flush failed",
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__func__, dqp);
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} else {
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error = xfs_bwrite(bp);
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xfs_buf_relse(bp);
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}
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xfs_dqflock(dqp);
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}
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ASSERT(atomic_read(&dqp->q_pincount) == 0);
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ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
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!(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
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xfs_dqfunlock(dqp);
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xfs_dqunlock(dqp);
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radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
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be32_to_cpu(dqp->q_core.d_id));
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qi->qi_dquots--;
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/*
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* We move dquots to the freelist as soon as their reference count
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* hits zero, so it really should be on the freelist here.
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*/
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ASSERT(!list_empty(&dqp->q_lru));
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list_lru_del(&qi->qi_lru, &dqp->q_lru);
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XFS_STATS_DEC(xs_qm_dquot_unused);
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xfs_qm_dqdestroy(dqp);
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if (gdqp)
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xfs_qm_dqput(gdqp);
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if (pdqp)
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xfs_qm_dqput(pdqp);
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return 0;
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}
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/*
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* Purge the dquot cache.
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*/
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void
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xfs_qm_dqpurge_all(
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struct xfs_mount *mp,
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uint flags)
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{
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if (flags & XFS_QMOPT_UQUOTA)
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xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
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if (flags & XFS_QMOPT_GQUOTA)
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xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
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if (flags & XFS_QMOPT_PQUOTA)
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xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
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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))
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mp->m_qflags &= ~XFS_GQUOTA_CHKD;
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if (!XFS_IS_PQUOTA_ON(mp))
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mp->m_qflags &= ~XFS_PQUOTA_CHKD;
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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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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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}
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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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/*
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* Called from the vfsops layer.
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*/
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void
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xfs_qm_unmount_quotas(
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xfs_mount_t *mp)
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{
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/*
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* Release the dquots that root inode, et al might be holding,
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* before we flush quotas and blow away the quotainfo structure.
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*/
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ASSERT(mp->m_rootip);
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xfs_qm_dqdetach(mp->m_rootip);
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if (mp->m_rbmip)
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xfs_qm_dqdetach(mp->m_rbmip);
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if (mp->m_rsumip)
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xfs_qm_dqdetach(mp->m_rsumip);
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/*
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* Release the quota inodes.
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*/
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if (mp->m_quotainfo) {
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if (mp->m_quotainfo->qi_uquotaip) {
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IRELE(mp->m_quotainfo->qi_uquotaip);
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mp->m_quotainfo->qi_uquotaip = NULL;
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}
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if (mp->m_quotainfo->qi_gquotaip) {
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IRELE(mp->m_quotainfo->qi_gquotaip);
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mp->m_quotainfo->qi_gquotaip = NULL;
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}
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if (mp->m_quotainfo->qi_pquotaip) {
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IRELE(mp->m_quotainfo->qi_pquotaip);
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mp->m_quotainfo->qi_pquotaip = NULL;
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}
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}
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}
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STATIC int
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xfs_qm_dqattach_one(
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xfs_inode_t *ip,
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xfs_dqid_t id,
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uint type,
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uint doalloc,
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xfs_dquot_t *udqhint, /* hint */
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xfs_dquot_t **IO_idqpp)
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{
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xfs_dquot_t *dqp;
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int error;
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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error = 0;
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/*
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* See if we already have it in the inode itself. IO_idqpp is
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* &i_udquot or &i_gdquot. This made the code look weird, but
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* made the logic a lot simpler.
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*/
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dqp = *IO_idqpp;
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if (dqp) {
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trace_xfs_dqattach_found(dqp);
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return 0;
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}
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/*
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* udqhint is the i_udquot field in inode, and is non-NULL only
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* when the type arg is group/project. Its purpose is to save a
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* lookup by dqid (xfs_qm_dqget) by caching a group dquot inside
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* the user dquot.
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*/
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if (udqhint) {
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ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
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xfs_dqlock(udqhint);
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/*
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* No need to take dqlock to look at the id.
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*
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* The ID can't change until it gets reclaimed, and it won't
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* be reclaimed as long as we have a ref from inode and we
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* hold the ilock.
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*/
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if (type == XFS_DQ_GROUP)
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dqp = udqhint->q_gdquot;
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else
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dqp = udqhint->q_pdquot;
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if (dqp && be32_to_cpu(dqp->q_core.d_id) == id) {
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ASSERT(*IO_idqpp == NULL);
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*IO_idqpp = xfs_qm_dqhold(dqp);
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xfs_dqunlock(udqhint);
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return 0;
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}
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|
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/*
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* We can't hold a dquot lock when we call the dqget code.
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* We'll deadlock in no time, because of (not conforming to)
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* lock ordering - the inodelock comes before any dquot lock,
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* and we may drop and reacquire the ilock in xfs_qm_dqget().
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*/
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xfs_dqunlock(udqhint);
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}
|
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|
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/*
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* Find the dquot from somewhere. This bumps the
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* reference count of dquot and returns it locked.
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* This can return ENOENT if dquot didn't exist on
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* disk and we didn't ask it to allocate;
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* ESRCH if quotas got turned off suddenly.
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*/
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error = xfs_qm_dqget(ip->i_mount, ip, id, type,
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doalloc | XFS_QMOPT_DOWARN, &dqp);
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if (error)
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return error;
|
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|
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trace_xfs_dqattach_get(dqp);
|
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|
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/*
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* dqget may have dropped and re-acquired the ilock, but it guarantees
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* that the dquot returned is the one that should go in the inode.
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*/
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*IO_idqpp = dqp;
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xfs_dqunlock(dqp);
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return 0;
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}
|
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|
|
|
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/*
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* Given a udquot and group/project type, attach the group/project
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* dquot pointer to the udquot as a hint for future lookups.
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*/
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STATIC void
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xfs_qm_dqattach_hint(
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struct xfs_inode *ip,
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int type)
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{
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struct xfs_dquot **dqhintp;
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struct xfs_dquot *dqp;
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struct xfs_dquot *udq = ip->i_udquot;
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|
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ASSERT(type == XFS_DQ_GROUP || type == XFS_DQ_PROJ);
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xfs_dqlock(udq);
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|
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if (type == XFS_DQ_GROUP) {
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dqp = ip->i_gdquot;
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dqhintp = &udq->q_gdquot;
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} else {
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dqp = ip->i_pdquot;
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dqhintp = &udq->q_pdquot;
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}
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|
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if (*dqhintp) {
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struct xfs_dquot *tmp;
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|
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if (*dqhintp == dqp)
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goto done;
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|
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tmp = *dqhintp;
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*dqhintp = NULL;
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xfs_qm_dqrele(tmp);
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}
|
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|
|
*dqhintp = xfs_qm_dqhold(dqp);
|
|
done:
|
|
xfs_dqunlock(udq);
|
|
}
|
|
|
|
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 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_qm_need_dqattach(ip))
|
|
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_GQUOTA_ON(mp)) {
|
|
error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
|
|
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++;
|
|
}
|
|
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
if (XFS_IS_PQUOTA_ON(mp)) {
|
|
error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
|
|
flags & XFS_QMOPT_DQALLOC,
|
|
ip->i_udquot, &ip->i_pdquot);
|
|
/*
|
|
* 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/project quota to the user quota as a hint.
|
|
* This WON'T, in general, result in a thrash.
|
|
*/
|
|
if (nquotas > 1 && ip->i_udquot) {
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
ASSERT(ip->i_gdquot || !XFS_IS_GQUOTA_ON(mp));
|
|
ASSERT(ip->i_pdquot || !XFS_IS_PQUOTA_ON(mp));
|
|
|
|
/*
|
|
* We do not have 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)
|
|
xfs_qm_dqattach_hint(ip, XFS_DQ_GROUP);
|
|
|
|
if (ip->i_udquot->q_pdquot != ip->i_pdquot)
|
|
xfs_qm_dqattach_hint(ip, XFS_DQ_PROJ);
|
|
}
|
|
|
|
done:
|
|
#ifdef DEBUG
|
|
if (!error) {
|
|
if (XFS_IS_UQUOTA_ON(mp))
|
|
ASSERT(ip->i_udquot);
|
|
if (XFS_IS_GQUOTA_ON(mp))
|
|
ASSERT(ip->i_gdquot);
|
|
if (XFS_IS_PQUOTA_ON(mp))
|
|
ASSERT(ip->i_pdquot);
|
|
}
|
|
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
|
|
#endif
|
|
return error;
|
|
}
|
|
|
|
int
|
|
xfs_qm_dqattach(
|
|
struct xfs_inode *ip,
|
|
uint flags)
|
|
{
|
|
int error;
|
|
|
|
if (!xfs_qm_need_dqattach(ip))
|
|
return 0;
|
|
|
|
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 || 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;
|
|
}
|
|
}
|
|
|
|
int
|
|
xfs_qm_calc_dquots_per_chunk(
|
|
struct xfs_mount *mp,
|
|
unsigned int nbblks) /* basic block units */
|
|
{
|
|
unsigned int ndquots;
|
|
|
|
ASSERT(nbblks > 0);
|
|
ndquots = BBTOB(nbblks);
|
|
do_div(ndquots, sizeof(xfs_dqblk_t));
|
|
|
|
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
|
|
*/
|
|
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));
|
|
|
|
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;
|
|
}
|
|
|
|
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_qm_calc_dquots_per_chunk(mp,
|
|
qinf->qi_dqchunklen);
|
|
|
|
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.
|
|
*
|
|
* Since we may not have done a quotacheck by this point, just read
|
|
* the dquot without attaching it to any hashtables or lists.
|
|
*/
|
|
error = xfs_qm_dqread(mp, 0,
|
|
XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
|
|
(XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
|
|
XFS_DQ_PROJ),
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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);
|
|
|
|
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;
|
|
}
|
|
if (qi->qi_pquotaip) {
|
|
IRELE(qi->qi_pquotaip);
|
|
qi->qi_pquotaip = NULL;
|
|
}
|
|
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,
|
|
__int64_t sbfields,
|
|
uint flags)
|
|
{
|
|
xfs_trans_t *tp;
|
|
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);
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_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 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_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)
|
|
{
|
|
struct xfs_dqblk *dqb;
|
|
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
|
|
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_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;
|
|
|
|
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_dqiter_bufs(
|
|
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;
|
|
|
|
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 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(
|
|
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), KM_SLEEP);
|
|
|
|
lblkno = 0;
|
|
maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
|
|
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,
|
|
NULL);
|
|
rablkno++;
|
|
}
|
|
}
|
|
/*
|
|
* Iterate thru all the blks in the extent and
|
|
* reset the counters of all the dquots inside them.
|
|
*/
|
|
error = xfs_qm_dqiter_bufs(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,
|
|
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);
|
|
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 (xfs_is_quota_inode(&mp->m_sb, ino)) {
|
|
*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;
|
|
}
|
|
|
|
STATIC int
|
|
xfs_qm_flush_one(
|
|
struct xfs_dquot *dqp,
|
|
void *data)
|
|
{
|
|
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;
|
|
|
|
xfs_dqflock(dqp);
|
|
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.
|
|
*/
|
|
int
|
|
xfs_qm_quotacheck(
|
|
xfs_mount_t *mp)
|
|
{
|
|
int done, count, error, error2;
|
|
xfs_ino_t lastino;
|
|
size_t structsz;
|
|
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;
|
|
|
|
count = INT_MAX;
|
|
structsz = 1;
|
|
lastino = 0;
|
|
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_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
|
|
&buffer_list);
|
|
if (error)
|
|
goto error_return;
|
|
flags |= XFS_UQUOTA_CHKD;
|
|
}
|
|
|
|
if (gip) {
|
|
error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
|
|
&buffer_list);
|
|
if (error)
|
|
goto error_return;
|
|
flags |= XFS_GQUOTA_CHKD;
|
|
}
|
|
|
|
if (pip) {
|
|
error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
|
|
&buffer_list);
|
|
if (error)
|
|
goto error_return;
|
|
flags |= XFS_PQUOTA_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 (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:
|
|
while (!list_empty(&buffer_list)) {
|
|
struct xfs_buf *bp =
|
|
list_first_entry(&buffer_list, struct xfs_buf, b_list);
|
|
list_del_init(&bp->b_list);
|
|
xfs_buf_relse(bp);
|
|
}
|
|
|
|
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 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;
|
|
__int64_t sbflags = 0;
|
|
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 XFS_ERROR(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;
|
|
sbflags |= (XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO |
|
|
XFS_SB_GQUOTINO | XFS_SB_PQUOTINO |
|
|
XFS_SB_QFLAGS);
|
|
}
|
|
|
|
/*
|
|
* 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,
|
|
sbflags | XFS_SB_UQUOTINO,
|
|
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,
|
|
sbflags | XFS_SB_GQUOTINO,
|
|
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,
|
|
sbflags | XFS_SB_PQUOTINO,
|
|
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)
|
|
IRELE(uip);
|
|
if (gip)
|
|
IRELE(gip);
|
|
if (pip)
|
|
IRELE(pip);
|
|
return XFS_ERROR(error);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
error = xfs_trans_reserve(tp, &M_RES(mp)->tr_qm_sbchange, 0, 0);
|
|
if (error) {
|
|
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,
|
|
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, XFS_QMOPT_DQALLOC);
|
|
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, NULL, uid,
|
|
XFS_DQ_USER,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&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, NULL, gid,
|
|
XFS_DQ_GROUP,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&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 (xfs_get_projid(ip) != prid) {
|
|
xfs_iunlock(ip, lockflags);
|
|
error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
|
|
XFS_DQ_PROJ,
|
|
XFS_QMOPT_DQALLOC |
|
|
XFS_QMOPT_DOWARN,
|
|
&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 if (uq)
|
|
xfs_qm_dqrele(uq);
|
|
if (O_gdqpp)
|
|
*O_gdqpp = gq;
|
|
else if (gq)
|
|
xfs_qm_dqrele(gq);
|
|
if (O_pdqpp)
|
|
*O_pdqpp = pq;
|
|
else if (pq)
|
|
xfs_qm_dqrele(pq);
|
|
return 0;
|
|
|
|
error_rele:
|
|
if (gq)
|
|
xfs_qm_dqrele(gq);
|
|
if (uq)
|
|
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(
|
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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struct xfs_dquot *udqp,
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struct xfs_dquot *gdqp,
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struct xfs_dquot *pdqp,
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uint flags)
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{
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struct xfs_mount *mp = ip->i_mount;
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uint delblks, blkflags, prjflags = 0;
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struct xfs_dquot *udq_unres = NULL;
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struct xfs_dquot *gdq_unres = NULL;
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struct xfs_dquot *pdq_unres = NULL;
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struct xfs_dquot *udq_delblks = NULL;
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struct xfs_dquot *gdq_delblks = NULL;
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struct xfs_dquot *pdq_delblks = NULL;
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int error;
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
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ASSERT(XFS_IS_QUOTA_RUNNING(mp));
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delblks = ip->i_delayed_blks;
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blkflags = XFS_IS_REALTIME_INODE(ip) ?
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XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
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if (XFS_IS_UQUOTA_ON(mp) && udqp &&
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ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
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udq_delblks = udqp;
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/*
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* If there are delayed allocation blocks, then we have to
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* unreserve those from the old dquot, and add them to the
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* new dquot.
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*/
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if (delblks) {
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ASSERT(ip->i_udquot);
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udq_unres = ip->i_udquot;
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}
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}
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if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
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ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
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gdq_delblks = gdqp;
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if (delblks) {
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ASSERT(ip->i_gdquot);
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gdq_unres = ip->i_gdquot;
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}
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}
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if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
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xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
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prjflags = XFS_QMOPT_ENOSPC;
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pdq_delblks = pdqp;
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if (delblks) {
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ASSERT(ip->i_pdquot);
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pdq_unres = ip->i_pdquot;
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}
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}
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error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
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udq_delblks, gdq_delblks, pdq_delblks,
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ip->i_d.di_nblocks, 1,
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flags | blkflags | prjflags);
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if (error)
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return error;
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/*
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* Do the delayed blks reservations/unreservations now. Since, these
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* are done without the help of a transaction, if a reservation fails
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* its previous reservations won't be automatically undone by trans
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* code. So, we have to do it manually here.
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*/
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if (delblks) {
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/*
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* Do the reservations first. Unreservation can't fail.
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*/
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ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
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ASSERT(udq_unres || gdq_unres || pdq_unres);
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error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
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udq_delblks, gdq_delblks, pdq_delblks,
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(xfs_qcnt_t)delblks, 0,
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flags | blkflags | prjflags);
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if (error)
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return error;
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xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
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udq_unres, gdq_unres, pdq_unres,
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-((xfs_qcnt_t)delblks), 0, blkflags);
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}
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return (0);
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}
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int
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xfs_qm_vop_rename_dqattach(
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struct xfs_inode **i_tab)
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{
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struct xfs_mount *mp = i_tab[0]->i_mount;
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int i;
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if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
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return 0;
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for (i = 0; (i < 4 && i_tab[i]); i++) {
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struct xfs_inode *ip = i_tab[i];
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int error;
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/*
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* Watch out for duplicate entries in the table.
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*/
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if (i == 0 || ip != i_tab[i-1]) {
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if (XFS_NOT_DQATTACHED(mp, ip)) {
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error = xfs_qm_dqattach(ip, 0);
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if (error)
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return error;
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}
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}
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}
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return 0;
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}
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void
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xfs_qm_vop_create_dqattach(
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struct xfs_trans *tp,
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struct xfs_inode *ip,
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struct xfs_dquot *udqp,
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struct xfs_dquot *gdqp,
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struct xfs_dquot *pdqp)
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{
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struct xfs_mount *mp = tp->t_mountp;
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if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
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return;
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ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
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ASSERT(XFS_IS_QUOTA_RUNNING(mp));
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if (udqp) {
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ASSERT(ip->i_udquot == NULL);
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ASSERT(XFS_IS_UQUOTA_ON(mp));
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ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
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ip->i_udquot = xfs_qm_dqhold(udqp);
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xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
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}
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if (gdqp) {
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ASSERT(ip->i_gdquot == NULL);
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ASSERT(XFS_IS_GQUOTA_ON(mp));
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ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
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ip->i_gdquot = xfs_qm_dqhold(gdqp);
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xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
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}
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if (pdqp) {
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ASSERT(ip->i_pdquot == NULL);
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ASSERT(XFS_IS_PQUOTA_ON(mp));
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ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
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ip->i_pdquot = xfs_qm_dqhold(pdqp);
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xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
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}
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}
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